src/audio/alsa/SDL_alsa_audio.c
author Ryan C. Gordon <icculus@icculus.org>
Sat, 05 Mar 2016 23:25:23 -0500
changeset 10104 4cd67316b308
parent 9998 f67cf37e9cd4
child 10142 bc8ac6c0cd98
permissions -rw-r--r--
alsa: Implemented basic device detection. This is kind of nasty, because ALSA reports dozens of "devices" that aren't really things you'd ever want, or things that should be listed this way, but the default path still works as before, and it at least allows these devices to be available to apps. This does not handle hotplugging yet. You get a device list at init time and that's it.
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/*
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  Simple DirectMedia Layer
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  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
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  This software is provided 'as-is', without any express or implied
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  warranty.  In no event will the authors be held liable for any damages
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  arising from the use of this software.
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  Permission is granted to anyone to use this software for any purpose,
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  including commercial applications, and to alter it and redistribute it
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  freely, subject to the following restrictions:
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  1. The origin of this software must not be misrepresented; you must not
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     claim that you wrote the original software. If you use this software
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     in a product, an acknowledgment in the product documentation would be
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     appreciated but is not required.
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  2. Altered source versions must be plainly marked as such, and must not be
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     misrepresented as being the original software.
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  3. This notice may not be removed or altered from any source distribution.
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*/
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#include "../../SDL_internal.h"
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#if SDL_AUDIO_DRIVER_ALSA
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/* Allow access to a raw mixing buffer */
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#include <sys/types.h>
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#include <signal.h>             /* For kill() */
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#include <errno.h>
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#include <string.h>
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#include "SDL_timer.h"
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#include "SDL_audio.h"
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#include "../SDL_audiomem.h"
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#include "../SDL_audio_c.h"
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#include "SDL_alsa_audio.h"
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#ifdef SDL_AUDIO_DRIVER_ALSA_DYNAMIC
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#include "SDL_loadso.h"
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#endif
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static int (*ALSA_snd_pcm_open)
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  (snd_pcm_t **, const char *, snd_pcm_stream_t, int);
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static int (*ALSA_snd_pcm_close) (snd_pcm_t * pcm);
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static snd_pcm_sframes_t(*ALSA_snd_pcm_writei)
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  (snd_pcm_t *, const void *, snd_pcm_uframes_t);
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static int (*ALSA_snd_pcm_recover) (snd_pcm_t *, int, int);
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static int (*ALSA_snd_pcm_prepare) (snd_pcm_t *);
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static int (*ALSA_snd_pcm_drain) (snd_pcm_t *);
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static const char *(*ALSA_snd_strerror) (int);
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static size_t(*ALSA_snd_pcm_hw_params_sizeof) (void);
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static size_t(*ALSA_snd_pcm_sw_params_sizeof) (void);
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static void (*ALSA_snd_pcm_hw_params_copy)
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  (snd_pcm_hw_params_t *, const snd_pcm_hw_params_t *);
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static int (*ALSA_snd_pcm_hw_params_any) (snd_pcm_t *, snd_pcm_hw_params_t *);
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static int (*ALSA_snd_pcm_hw_params_set_access)
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  (snd_pcm_t *, snd_pcm_hw_params_t *, snd_pcm_access_t);
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static int (*ALSA_snd_pcm_hw_params_set_format)
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  (snd_pcm_t *, snd_pcm_hw_params_t *, snd_pcm_format_t);
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static int (*ALSA_snd_pcm_hw_params_set_channels)
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  (snd_pcm_t *, snd_pcm_hw_params_t *, unsigned int);
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static int (*ALSA_snd_pcm_hw_params_get_channels)
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  (const snd_pcm_hw_params_t *, unsigned int *);
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static int (*ALSA_snd_pcm_hw_params_set_rate_near)
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  (snd_pcm_t *, snd_pcm_hw_params_t *, unsigned int *, int *);
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static int (*ALSA_snd_pcm_hw_params_set_period_size_near)
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  (snd_pcm_t *, snd_pcm_hw_params_t *, snd_pcm_uframes_t *, int *);
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static int (*ALSA_snd_pcm_hw_params_get_period_size)
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  (const snd_pcm_hw_params_t *, snd_pcm_uframes_t *, int *);
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static int (*ALSA_snd_pcm_hw_params_set_periods_near)
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  (snd_pcm_t *, snd_pcm_hw_params_t *, unsigned int *, int *);
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static int (*ALSA_snd_pcm_hw_params_get_periods)
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  (const snd_pcm_hw_params_t *, unsigned int *, int *);
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static int (*ALSA_snd_pcm_hw_params_set_buffer_size_near)
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  (snd_pcm_t *pcm, snd_pcm_hw_params_t *, snd_pcm_uframes_t *);
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static int (*ALSA_snd_pcm_hw_params_get_buffer_size)
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  (const snd_pcm_hw_params_t *, snd_pcm_uframes_t *);
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static int (*ALSA_snd_pcm_hw_params) (snd_pcm_t *, snd_pcm_hw_params_t *);
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static int (*ALSA_snd_pcm_sw_params_current) (snd_pcm_t *,
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                                              snd_pcm_sw_params_t *);
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static int (*ALSA_snd_pcm_sw_params_set_start_threshold)
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  (snd_pcm_t *, snd_pcm_sw_params_t *, snd_pcm_uframes_t);
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static int (*ALSA_snd_pcm_sw_params) (snd_pcm_t *, snd_pcm_sw_params_t *);
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static int (*ALSA_snd_pcm_nonblock) (snd_pcm_t *, int);
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static int (*ALSA_snd_pcm_wait)(snd_pcm_t *, int);
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static int (*ALSA_snd_pcm_sw_params_set_avail_min)
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  (snd_pcm_t *, snd_pcm_sw_params_t *, snd_pcm_uframes_t);
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static int (*ALSA_snd_device_name_hint) (int, const char *, void ***);
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static char* (*ALSA_snd_device_name_get_hint) (const void *, const char *);
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static int (*ALSA_snd_device_name_free_hint) (void **);
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#ifdef SDL_AUDIO_DRIVER_ALSA_DYNAMIC
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#define snd_pcm_hw_params_sizeof ALSA_snd_pcm_hw_params_sizeof
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#define snd_pcm_sw_params_sizeof ALSA_snd_pcm_sw_params_sizeof
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static const char *alsa_library = SDL_AUDIO_DRIVER_ALSA_DYNAMIC;
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static void *alsa_handle = NULL;
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static int
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load_alsa_sym(const char *fn, void **addr)
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{
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    *addr = SDL_LoadFunction(alsa_handle, fn);
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    if (*addr == NULL) {
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        /* Don't call SDL_SetError(): SDL_LoadFunction already did. */
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        return 0;
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    }
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    return 1;
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}
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/* cast funcs to char* first, to please GCC's strict aliasing rules. */
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#define SDL_ALSA_SYM(x) \
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    if (!load_alsa_sym(#x, (void **) (char *) &ALSA_##x)) return -1
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#else
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#define SDL_ALSA_SYM(x) ALSA_##x = x
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#endif
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static int
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load_alsa_syms(void)
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{
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    SDL_ALSA_SYM(snd_pcm_open);
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    SDL_ALSA_SYM(snd_pcm_close);
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    SDL_ALSA_SYM(snd_pcm_writei);
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    SDL_ALSA_SYM(snd_pcm_recover);
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    SDL_ALSA_SYM(snd_pcm_prepare);
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    SDL_ALSA_SYM(snd_pcm_drain);
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    SDL_ALSA_SYM(snd_strerror);
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    SDL_ALSA_SYM(snd_pcm_hw_params_sizeof);
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    SDL_ALSA_SYM(snd_pcm_sw_params_sizeof);
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    SDL_ALSA_SYM(snd_pcm_hw_params_copy);
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    SDL_ALSA_SYM(snd_pcm_hw_params_any);
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    SDL_ALSA_SYM(snd_pcm_hw_params_set_access);
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    SDL_ALSA_SYM(snd_pcm_hw_params_set_format);
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    SDL_ALSA_SYM(snd_pcm_hw_params_set_channels);
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    SDL_ALSA_SYM(snd_pcm_hw_params_get_channels);
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    SDL_ALSA_SYM(snd_pcm_hw_params_set_rate_near);
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    SDL_ALSA_SYM(snd_pcm_hw_params_set_period_size_near);
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    SDL_ALSA_SYM(snd_pcm_hw_params_get_period_size);
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    SDL_ALSA_SYM(snd_pcm_hw_params_set_periods_near);
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    SDL_ALSA_SYM(snd_pcm_hw_params_get_periods);
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    SDL_ALSA_SYM(snd_pcm_hw_params_set_buffer_size_near);
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    SDL_ALSA_SYM(snd_pcm_hw_params_get_buffer_size);
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    SDL_ALSA_SYM(snd_pcm_hw_params);
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    SDL_ALSA_SYM(snd_pcm_sw_params_current);
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    SDL_ALSA_SYM(snd_pcm_sw_params_set_start_threshold);
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    SDL_ALSA_SYM(snd_pcm_sw_params);
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    SDL_ALSA_SYM(snd_pcm_nonblock);
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    SDL_ALSA_SYM(snd_pcm_wait);
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    SDL_ALSA_SYM(snd_pcm_sw_params_set_avail_min);
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    SDL_ALSA_SYM(snd_device_name_hint);
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    SDL_ALSA_SYM(snd_device_name_get_hint);
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    SDL_ALSA_SYM(snd_device_name_free_hint);
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    return 0;
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}
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#undef SDL_ALSA_SYM
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#ifdef SDL_AUDIO_DRIVER_ALSA_DYNAMIC
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static void
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UnloadALSALibrary(void)
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{
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    if (alsa_handle != NULL) {
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        SDL_UnloadObject(alsa_handle);
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        alsa_handle = NULL;
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    }
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}
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static int
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LoadALSALibrary(void)
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{
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    int retval = 0;
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    if (alsa_handle == NULL) {
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        alsa_handle = SDL_LoadObject(alsa_library);
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        if (alsa_handle == NULL) {
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            retval = -1;
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            /* Don't call SDL_SetError(): SDL_LoadObject already did. */
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        } else {
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            retval = load_alsa_syms();
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            if (retval < 0) {
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                UnloadALSALibrary();
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            }
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        }
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    }
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    return retval;
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}
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#else
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static void
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UnloadALSALibrary(void)
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{
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}
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static int
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LoadALSALibrary(void)
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{
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    load_alsa_syms();
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    return 0;
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}
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#endif /* SDL_AUDIO_DRIVER_ALSA_DYNAMIC */
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static const char *
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get_audio_device(void *handle, const int channels)
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{
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    const char *device;
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    if (handle != NULL) {
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        return (const char *) handle;
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    }
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    /* !!! FIXME: we also check "SDL_AUDIO_DEVICE_NAME" at the higher level. */
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    device = SDL_getenv("AUDIODEV");    /* Is there a standard variable name? */
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    if (device != NULL) {
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        return device;
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    }
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    if (channels == 6) {
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        return "plug:surround51";
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    } else if (channels == 4) {
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        return "plug:surround40";
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    }
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    return "default";
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}
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/* This function waits until it is possible to write a full sound buffer */
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static void
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ALSA_WaitDevice(_THIS)
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{
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    /* We're in blocking mode, so there's nothing to do here */
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}
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/* !!! FIXME: is there a channel swizzler in alsalib instead? */
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/*
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 * http://bugzilla.libsdl.org/show_bug.cgi?id=110
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 * "For Linux ALSA, this is FL-FR-RL-RR-C-LFE
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 *  and for Windows DirectX [and CoreAudio], this is FL-FR-C-LFE-RL-RR"
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 */
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#define SWIZ6(T) \
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    T *ptr = (T *) this->hidden->mixbuf; \
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    Uint32 i; \
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    for (i = 0; i < this->spec.samples; i++, ptr += 6) { \
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        T tmp; \
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        tmp = ptr[2]; ptr[2] = ptr[4]; ptr[4] = tmp; \
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        tmp = ptr[3]; ptr[3] = ptr[5]; ptr[5] = tmp; \
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    }
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static SDL_INLINE void
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swizzle_alsa_channels_6_64bit(_THIS)
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{
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    SWIZ6(Uint64);
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}
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static SDL_INLINE void
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swizzle_alsa_channels_6_32bit(_THIS)
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{
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    SWIZ6(Uint32);
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}
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static SDL_INLINE void
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swizzle_alsa_channels_6_16bit(_THIS)
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{
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    SWIZ6(Uint16);
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}
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static SDL_INLINE void
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swizzle_alsa_channels_6_8bit(_THIS)
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{
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    SWIZ6(Uint8);
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}
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#undef SWIZ6
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/*
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 * Called right before feeding this->hidden->mixbuf to the hardware. Swizzle
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 *  channels from Windows/Mac order to the format alsalib will want.
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 */
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static SDL_INLINE void
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swizzle_alsa_channels(_THIS)
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{
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    if (this->spec.channels == 6) {
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        const Uint16 fmtsize = (this->spec.format & 0xFF);      /* bits/channel. */
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        if (fmtsize == 16)
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            swizzle_alsa_channels_6_16bit(this);
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        else if (fmtsize == 8)
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            swizzle_alsa_channels_6_8bit(this);
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        else if (fmtsize == 32)
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            swizzle_alsa_channels_6_32bit(this);
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        else if (fmtsize == 64)
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            swizzle_alsa_channels_6_64bit(this);
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    }
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    /* !!! FIXME: update this for 7.1 if needed, later. */
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}
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static void
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ALSA_PlayDevice(_THIS)
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{
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    int status;
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    const Uint8 *sample_buf = (const Uint8 *) this->hidden->mixbuf;
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    const int frame_size = (((int) (this->spec.format & 0xFF)) / 8) *
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                                this->spec.channels;
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    snd_pcm_uframes_t frames_left = ((snd_pcm_uframes_t) this->spec.samples);
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    swizzle_alsa_channels(this);
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    while ( frames_left > 0 && this->enabled ) {
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        /* !!! FIXME: This works, but needs more testing before going live */
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        /* ALSA_snd_pcm_wait(this->hidden->pcm_handle, -1); */
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        status = ALSA_snd_pcm_writei(this->hidden->pcm_handle,
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                                     sample_buf, frames_left);
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        if (status < 0) {
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            if (status == -EAGAIN) {
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                /* Apparently snd_pcm_recover() doesn't handle this case -
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                   does it assume snd_pcm_wait() above? */
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                SDL_Delay(1);
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                continue;
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            }
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            status = ALSA_snd_pcm_recover(this->hidden->pcm_handle, status, 0);
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            if (status < 0) {
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                /* Hmm, not much we can do - abort */
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                fprintf(stderr, "ALSA write failed (unrecoverable): %s\n",
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                        ALSA_snd_strerror(status));
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                SDL_OpenedAudioDeviceDisconnected(this);
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                return;
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            }
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            continue;
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        }
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diff changeset
   337
        sample_buf += status * frame_size;
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
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parents: 3362
diff changeset
   338
        frames_left -= status;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1878
diff changeset
   339
    }
0
74212992fb08 Initial revision
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parents:
diff changeset
   340
}
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   341
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   342
static Uint8 *
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   343
ALSA_GetDeviceBuf(_THIS)
0
74212992fb08 Initial revision
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parents:
diff changeset
   344
{
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   345
    return (this->hidden->mixbuf);
0
74212992fb08 Initial revision
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parents:
diff changeset
   346
}
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   347
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1878
diff changeset
   348
static void
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   349
ALSA_CloseDevice(_THIS)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   350
{
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   351
    if (this->hidden != NULL) {
7719
31b5f9ff36ca Christoph Mallon: Remove pointless if (x) before SDL_free(x)
Sam Lantinga <slouken@libsdl.org>
parents: 7678
diff changeset
   352
        SDL_FreeAudioMem(this->hidden->mixbuf);
31b5f9ff36ca Christoph Mallon: Remove pointless if (x) before SDL_free(x)
Sam Lantinga <slouken@libsdl.org>
parents: 7678
diff changeset
   353
        this->hidden->mixbuf = NULL;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   354
        if (this->hidden->pcm_handle) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   355
            ALSA_snd_pcm_drain(this->hidden->pcm_handle);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   356
            ALSA_snd_pcm_close(this->hidden->pcm_handle);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   357
            this->hidden->pcm_handle = NULL;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   358
        }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   359
        SDL_free(this->hidden);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   360
        this->hidden = NULL;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   361
    }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   362
}
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   363
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   364
static int
3627
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   365
ALSA_finalize_hardware(_THIS, snd_pcm_hw_params_t *hwparams, int override)
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   366
{
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   367
    int status;
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   368
    snd_pcm_uframes_t bufsize;
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   369
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   370
    /* "set" the hardware with the desired parameters */
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   371
    status = ALSA_snd_pcm_hw_params(this->hidden->pcm_handle, hwparams);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   372
    if ( status < 0 ) {
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   373
        return(-1);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   374
    }
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   375
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   376
    /* Get samples for the actual buffer size */
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   377
    status = ALSA_snd_pcm_hw_params_get_buffer_size(hwparams, &bufsize);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   378
    if ( status < 0 ) {
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   379
        return(-1);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   380
    }
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   381
    if ( !override && bufsize != this->spec.samples * 2 ) {
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   382
        return(-1);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   383
    }
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   384
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   385
    /* !!! FIXME: Is this safe to do? */
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   386
    this->spec.samples = bufsize / 2;
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   387
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   388
    /* This is useful for debugging */
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   389
    if ( SDL_getenv("SDL_AUDIO_ALSA_DEBUG") ) {
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   390
        snd_pcm_uframes_t persize = 0;
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   391
        unsigned int periods = 0;
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   392
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   393
        ALSA_snd_pcm_hw_params_get_period_size(hwparams, &persize, NULL);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   394
        ALSA_snd_pcm_hw_params_get_periods(hwparams, &periods, NULL);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   395
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   396
        fprintf(stderr,
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   397
            "ALSA: period size = %ld, periods = %u, buffer size = %lu\n",
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   398
            persize, periods, bufsize);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   399
    }
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   400
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   401
    return(0);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   402
}
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   403
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   404
static int
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   405
ALSA_set_period_size(_THIS, snd_pcm_hw_params_t *params, int override)
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   406
{
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   407
    const char *env;
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   408
    int status;
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   409
    snd_pcm_hw_params_t *hwparams;
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   410
    snd_pcm_uframes_t frames;
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   411
    unsigned int periods;
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   412
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   413
    /* Copy the hardware parameters for this setup */
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   414
    snd_pcm_hw_params_alloca(&hwparams);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   415
    ALSA_snd_pcm_hw_params_copy(hwparams, params);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   416
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   417
    if ( !override ) {
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   418
        env = SDL_getenv("SDL_AUDIO_ALSA_SET_PERIOD_SIZE");
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   419
        if ( env ) {
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   420
            override = SDL_atoi(env);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   421
            if ( override == 0 ) {
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   422
                return(-1);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   423
            }
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   424
        }
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   425
    }
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   426
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   427
    frames = this->spec.samples;
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   428
    status = ALSA_snd_pcm_hw_params_set_period_size_near(
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   429
                this->hidden->pcm_handle, hwparams, &frames, NULL);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   430
    if ( status < 0 ) {
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   431
        return(-1);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   432
    }
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   433
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   434
    periods = 2;
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   435
    status = ALSA_snd_pcm_hw_params_set_periods_near(
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   436
                this->hidden->pcm_handle, hwparams, &periods, NULL);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   437
    if ( status < 0 ) {
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   438
        return(-1);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   439
    }
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   440
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   441
    return ALSA_finalize_hardware(this, hwparams, override);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   442
}
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   443
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   444
static int
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   445
ALSA_set_buffer_size(_THIS, snd_pcm_hw_params_t *params, int override)
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   446
{
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   447
    const char *env;
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   448
    int status;
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   449
    snd_pcm_hw_params_t *hwparams;
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   450
    snd_pcm_uframes_t frames;
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   451
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   452
    /* Copy the hardware parameters for this setup */
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   453
    snd_pcm_hw_params_alloca(&hwparams);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   454
    ALSA_snd_pcm_hw_params_copy(hwparams, params);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   455
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   456
    if ( !override ) {
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   457
        env = SDL_getenv("SDL_AUDIO_ALSA_SET_BUFFER_SIZE");
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   458
        if ( env ) {
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   459
            override = SDL_atoi(env);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   460
            if ( override == 0 ) {
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   461
                return(-1);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   462
            }
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   463
        }
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   464
    }
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   465
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   466
    frames = this->spec.samples * 2;
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   467
    status = ALSA_snd_pcm_hw_params_set_buffer_size_near(
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   468
                    this->hidden->pcm_handle, hwparams, &frames);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   469
    if ( status < 0 ) {
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   470
        return(-1);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   471
    }
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   472
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   473
    return ALSA_finalize_hardware(this, hwparams, override);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   474
}
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   475
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   476
static int
9394
bb28e5281770 Bunch of reworking to how we manage audio devices.
Ryan C. Gordon <icculus@icculus.org>
parents: 9393
diff changeset
   477
ALSA_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   478
{
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   479
    int status = 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   480
    snd_pcm_t *pcm_handle = NULL;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   481
    snd_pcm_hw_params_t *hwparams = NULL;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   482
    snd_pcm_sw_params_t *swparams = NULL;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   483
    snd_pcm_format_t format = 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   484
    SDL_AudioFormat test_format = 0;
3362
4e83cdb58134 Merged r4990:4991 from branches/SDL-1.2: ALSA 1.0 API and dlvsym() removal.
Ryan C. Gordon <icculus@icculus.org>
parents: 3068
diff changeset
   485
    unsigned int rate = 0;
4e83cdb58134 Merged r4990:4991 from branches/SDL-1.2: ALSA 1.0 API and dlvsym() removal.
Ryan C. Gordon <icculus@icculus.org>
parents: 3068
diff changeset
   486
    unsigned int channels = 0;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   487
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   488
    /* Initialize all variables that we clean on shutdown */
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   489
    this->hidden = (struct SDL_PrivateAudioData *)
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
   490
        SDL_malloc((sizeof *this->hidden));
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   491
    if (this->hidden == NULL) {
7038
7f22b9ba218f Changed audio subsystem's OpenDevice interface to return -1 on error.
Ryan C. Gordon <icculus@icculus.org>
parents: 6885
diff changeset
   492
        return SDL_OutOfMemory();
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   493
    }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   494
    SDL_memset(this->hidden, 0, (sizeof *this->hidden));
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   495
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   496
    /* Open the audio device */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   497
    /* Name of device should depend on # channels in spec */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   498
    status = ALSA_snd_pcm_open(&pcm_handle,
10104
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   499
                               get_audio_device(handle, this->spec.channels),
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   500
                               SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
942
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents: 939
diff changeset
   501
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   502
    if (status < 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   503
        ALSA_CloseDevice(this);
7038
7f22b9ba218f Changed audio subsystem's OpenDevice interface to return -1 on error.
Ryan C. Gordon <icculus@icculus.org>
parents: 6885
diff changeset
   504
        return SDL_SetError("ALSA: Couldn't open audio device: %s",
7f22b9ba218f Changed audio subsystem's OpenDevice interface to return -1 on error.
Ryan C. Gordon <icculus@icculus.org>
parents: 6885
diff changeset
   505
                            ALSA_snd_strerror(status));
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   506
    }
354
30935e76acb5 Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
   507
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   508
    this->hidden->pcm_handle = pcm_handle;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   509
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   510
    /* Figure out what the hardware is capable of */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   511
    snd_pcm_hw_params_alloca(&hwparams);
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   512
    status = ALSA_snd_pcm_hw_params_any(pcm_handle, hwparams);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   513
    if (status < 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   514
        ALSA_CloseDevice(this);
7038
7f22b9ba218f Changed audio subsystem's OpenDevice interface to return -1 on error.
Ryan C. Gordon <icculus@icculus.org>
parents: 6885
diff changeset
   515
        return SDL_SetError("ALSA: Couldn't get hardware config: %s",
7f22b9ba218f Changed audio subsystem's OpenDevice interface to return -1 on error.
Ryan C. Gordon <icculus@icculus.org>
parents: 6885
diff changeset
   516
                            ALSA_snd_strerror(status));
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   517
    }
354
30935e76acb5 Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
   518
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   519
    /* SDL only uses interleaved sample output */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   520
    status = ALSA_snd_pcm_hw_params_set_access(pcm_handle, hwparams,
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   521
                                               SND_PCM_ACCESS_RW_INTERLEAVED);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   522
    if (status < 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   523
        ALSA_CloseDevice(this);
7038
7f22b9ba218f Changed audio subsystem's OpenDevice interface to return -1 on error.
Ryan C. Gordon <icculus@icculus.org>
parents: 6885
diff changeset
   524
        return SDL_SetError("ALSA: Couldn't set interleaved access: %s",
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   525
                     ALSA_snd_strerror(status));
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   526
    }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   527
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   528
    /* Try for a closest match on audio format */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   529
    status = -1;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   530
    for (test_format = SDL_FirstAudioFormat(this->spec.format);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   531
         test_format && (status < 0);) {
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
   532
        status = 0;             /* if we can't support a format, it'll become -1. */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   533
        switch (test_format) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   534
        case AUDIO_U8:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   535
            format = SND_PCM_FORMAT_U8;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   536
            break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   537
        case AUDIO_S8:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   538
            format = SND_PCM_FORMAT_S8;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   539
            break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   540
        case AUDIO_S16LSB:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   541
            format = SND_PCM_FORMAT_S16_LE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   542
            break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   543
        case AUDIO_S16MSB:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   544
            format = SND_PCM_FORMAT_S16_BE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   545
            break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   546
        case AUDIO_U16LSB:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   547
            format = SND_PCM_FORMAT_U16_LE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   548
            break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   549
        case AUDIO_U16MSB:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   550
            format = SND_PCM_FORMAT_U16_BE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   551
            break;
1995
0ca6ba107642 ALSA backend can handle int32 and float32 data directly.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   552
        case AUDIO_S32LSB:
2010
39897da56f63 Whoops, wrong tokens for int32 support in ALSA driver (specified unsigned
Ryan C. Gordon <icculus@icculus.org>
parents: 2009
diff changeset
   553
            format = SND_PCM_FORMAT_S32_LE;
1995
0ca6ba107642 ALSA backend can handle int32 and float32 data directly.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   554
            break;
0ca6ba107642 ALSA backend can handle int32 and float32 data directly.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   555
        case AUDIO_S32MSB:
2010
39897da56f63 Whoops, wrong tokens for int32 support in ALSA driver (specified unsigned
Ryan C. Gordon <icculus@icculus.org>
parents: 2009
diff changeset
   556
            format = SND_PCM_FORMAT_S32_BE;
1995
0ca6ba107642 ALSA backend can handle int32 and float32 data directly.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   557
            break;
0ca6ba107642 ALSA backend can handle int32 and float32 data directly.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   558
        case AUDIO_F32LSB:
0ca6ba107642 ALSA backend can handle int32 and float32 data directly.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   559
            format = SND_PCM_FORMAT_FLOAT_LE;
0ca6ba107642 ALSA backend can handle int32 and float32 data directly.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   560
            break;
0ca6ba107642 ALSA backend can handle int32 and float32 data directly.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   561
        case AUDIO_F32MSB:
0ca6ba107642 ALSA backend can handle int32 and float32 data directly.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   562
            format = SND_PCM_FORMAT_FLOAT_BE;
0ca6ba107642 ALSA backend can handle int32 and float32 data directly.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   563
            break;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   564
        default:
2009
f2058fb367e4 ALSA was testing if (format) was set to zero as an error condition, but
Ryan C. Gordon <icculus@icculus.org>
parents: 1995
diff changeset
   565
            status = -1;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   566
            break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   567
        }
2009
f2058fb367e4 ALSA was testing if (format) was set to zero as an error condition, but
Ryan C. Gordon <icculus@icculus.org>
parents: 1995
diff changeset
   568
        if (status >= 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   569
            status = ALSA_snd_pcm_hw_params_set_format(pcm_handle,
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   570
                                                       hwparams, format);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   571
        }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   572
        if (status < 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   573
            test_format = SDL_NextAudioFormat();
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   574
        }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   575
    }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   576
    if (status < 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   577
        ALSA_CloseDevice(this);
7038
7f22b9ba218f Changed audio subsystem's OpenDevice interface to return -1 on error.
Ryan C. Gordon <icculus@icculus.org>
parents: 6885
diff changeset
   578
        return SDL_SetError("ALSA: Couldn't find any hardware audio formats");
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   579
    }
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   580
    this->spec.format = test_format;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   581
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   582
    /* Set the number of channels */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   583
    status = ALSA_snd_pcm_hw_params_set_channels(pcm_handle, hwparams,
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   584
                                                 this->spec.channels);
3362
4e83cdb58134 Merged r4990:4991 from branches/SDL-1.2: ALSA 1.0 API and dlvsym() removal.
Ryan C. Gordon <icculus@icculus.org>
parents: 3068
diff changeset
   585
    channels = this->spec.channels;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   586
    if (status < 0) {
3362
4e83cdb58134 Merged r4990:4991 from branches/SDL-1.2: ALSA 1.0 API and dlvsym() removal.
Ryan C. Gordon <icculus@icculus.org>
parents: 3068
diff changeset
   587
        status = ALSA_snd_pcm_hw_params_get_channels(hwparams, &channels);
4e83cdb58134 Merged r4990:4991 from branches/SDL-1.2: ALSA 1.0 API and dlvsym() removal.
Ryan C. Gordon <icculus@icculus.org>
parents: 3068
diff changeset
   588
        if (status < 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   589
            ALSA_CloseDevice(this);
7038
7f22b9ba218f Changed audio subsystem's OpenDevice interface to return -1 on error.
Ryan C. Gordon <icculus@icculus.org>
parents: 6885
diff changeset
   590
            return SDL_SetError("ALSA: Couldn't set audio channels");
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   591
        }
3362
4e83cdb58134 Merged r4990:4991 from branches/SDL-1.2: ALSA 1.0 API and dlvsym() removal.
Ryan C. Gordon <icculus@icculus.org>
parents: 3068
diff changeset
   592
        this->spec.channels = channels;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   593
    }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   594
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   595
    /* Set the audio rate */
3362
4e83cdb58134 Merged r4990:4991 from branches/SDL-1.2: ALSA 1.0 API and dlvsym() removal.
Ryan C. Gordon <icculus@icculus.org>
parents: 3068
diff changeset
   596
    rate = this->spec.freq;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   597
    status = ALSA_snd_pcm_hw_params_set_rate_near(pcm_handle, hwparams,
3362
4e83cdb58134 Merged r4990:4991 from branches/SDL-1.2: ALSA 1.0 API and dlvsym() removal.
Ryan C. Gordon <icculus@icculus.org>
parents: 3068
diff changeset
   598
                                                  &rate, NULL);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   599
    if (status < 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   600
        ALSA_CloseDevice(this);
7038
7f22b9ba218f Changed audio subsystem's OpenDevice interface to return -1 on error.
Ryan C. Gordon <icculus@icculus.org>
parents: 6885
diff changeset
   601
        return SDL_SetError("ALSA: Couldn't set audio frequency: %s",
7f22b9ba218f Changed audio subsystem's OpenDevice interface to return -1 on error.
Ryan C. Gordon <icculus@icculus.org>
parents: 6885
diff changeset
   602
                            ALSA_snd_strerror(status));
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   603
    }
3362
4e83cdb58134 Merged r4990:4991 from branches/SDL-1.2: ALSA 1.0 API and dlvsym() removal.
Ryan C. Gordon <icculus@icculus.org>
parents: 3068
diff changeset
   604
    this->spec.freq = rate;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   605
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   606
    /* Set the buffer size, in samples */
3627
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   607
    if ( ALSA_set_period_size(this, hwparams, 0) < 0 &&
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   608
         ALSA_set_buffer_size(this, hwparams, 0) < 0 ) {
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   609
        /* Failed to set desired buffer size, do the best you can... */
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   610
        if ( ALSA_set_period_size(this, hwparams, 1) < 0 ) {
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   611
            ALSA_CloseDevice(this);
7038
7f22b9ba218f Changed audio subsystem's OpenDevice interface to return -1 on error.
Ryan C. Gordon <icculus@icculus.org>
parents: 6885
diff changeset
   612
            return SDL_SetError("Couldn't set hardware audio parameters: %s", ALSA_snd_strerror(status));
3627
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   613
        }
3362
4e83cdb58134 Merged r4990:4991 from branches/SDL-1.2: ALSA 1.0 API and dlvsym() removal.
Ryan C. Gordon <icculus@icculus.org>
parents: 3068
diff changeset
   614
    }
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   615
    /* Set the software parameters */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   616
    snd_pcm_sw_params_alloca(&swparams);
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   617
    status = ALSA_snd_pcm_sw_params_current(pcm_handle, swparams);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   618
    if (status < 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   619
        ALSA_CloseDevice(this);
7038
7f22b9ba218f Changed audio subsystem's OpenDevice interface to return -1 on error.
Ryan C. Gordon <icculus@icculus.org>
parents: 6885
diff changeset
   620
        return SDL_SetError("ALSA: Couldn't get software config: %s",
7f22b9ba218f Changed audio subsystem's OpenDevice interface to return -1 on error.
Ryan C. Gordon <icculus@icculus.org>
parents: 6885
diff changeset
   621
                            ALSA_snd_strerror(status));
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   622
    }
5622
08e941dad8e9 Ported ALSA minimum-sample-count fix from 1.2 branch to 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents: 5594
diff changeset
   623
    status = ALSA_snd_pcm_sw_params_set_avail_min(pcm_handle, swparams, this->spec.samples);
08e941dad8e9 Ported ALSA minimum-sample-count fix from 1.2 branch to 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents: 5594
diff changeset
   624
    if (status < 0) {
08e941dad8e9 Ported ALSA minimum-sample-count fix from 1.2 branch to 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents: 5594
diff changeset
   625
        ALSA_CloseDevice(this);
7038
7f22b9ba218f Changed audio subsystem's OpenDevice interface to return -1 on error.
Ryan C. Gordon <icculus@icculus.org>
parents: 6885
diff changeset
   626
        return SDL_SetError("Couldn't set minimum available samples: %s",
7f22b9ba218f Changed audio subsystem's OpenDevice interface to return -1 on error.
Ryan C. Gordon <icculus@icculus.org>
parents: 6885
diff changeset
   627
                            ALSA_snd_strerror(status));
5622
08e941dad8e9 Ported ALSA minimum-sample-count fix from 1.2 branch to 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents: 5594
diff changeset
   628
    }
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
   629
    status =
3627
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
   630
        ALSA_snd_pcm_sw_params_set_start_threshold(pcm_handle, swparams, 1);
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   631
    if (status < 0) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   632
        ALSA_CloseDevice(this);
7038
7f22b9ba218f Changed audio subsystem's OpenDevice interface to return -1 on error.
Ryan C. Gordon <icculus@icculus.org>
parents: 6885
diff changeset
   633
        return SDL_SetError("ALSA: Couldn't set start threshold: %s",
7f22b9ba218f Changed audio subsystem's OpenDevice interface to return -1 on error.
Ryan C. Gordon <icculus@icculus.org>
parents: 6885
diff changeset
   634
                            ALSA_snd_strerror(status));
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   635
    }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   636
    status = ALSA_snd_pcm_sw_params(pcm_handle, swparams);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   637
    if (status < 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   638
        ALSA_CloseDevice(this);
7038
7f22b9ba218f Changed audio subsystem's OpenDevice interface to return -1 on error.
Ryan C. Gordon <icculus@icculus.org>
parents: 6885
diff changeset
   639
        return SDL_SetError("Couldn't set software audio parameters: %s",
7f22b9ba218f Changed audio subsystem's OpenDevice interface to return -1 on error.
Ryan C. Gordon <icculus@icculus.org>
parents: 6885
diff changeset
   640
                            ALSA_snd_strerror(status));
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   641
    }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   642
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   643
    /* Calculate the final parameters for this audio specification */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   644
    SDL_CalculateAudioSpec(&this->spec);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   645
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   646
    /* Allocate mixing buffer */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   647
    this->hidden->mixlen = this->spec.size;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   648
    this->hidden->mixbuf = (Uint8 *) SDL_AllocAudioMem(this->hidden->mixlen);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   649
    if (this->hidden->mixbuf == NULL) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   650
        ALSA_CloseDevice(this);
7038
7f22b9ba218f Changed audio subsystem's OpenDevice interface to return -1 on error.
Ryan C. Gordon <icculus@icculus.org>
parents: 6885
diff changeset
   651
        return SDL_OutOfMemory();
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   652
    }
7365
a3fc9175306d Minor ALSA tweaks (include-once macro name, len for memset() more clear).
Ryan C. Gordon <icculus@icculus.org>
parents: 7191
diff changeset
   653
    SDL_memset(this->hidden->mixbuf, this->spec.silence, this->hidden->mixlen);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   654
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   655
    /* Switch to blocking mode for playback */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   656
    ALSA_snd_pcm_nonblock(pcm_handle, 0);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   657
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   658
    /* We're ready to rock and roll. :-) */
7038
7f22b9ba218f Changed audio subsystem's OpenDevice interface to return -1 on error.
Ryan C. Gordon <icculus@icculus.org>
parents: 6885
diff changeset
   659
    return 0;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   660
}
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   661
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   662
static void
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   663
ALSA_Deinitialize(void)
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   664
{
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   665
    UnloadALSALibrary();
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   666
}
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   667
10104
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   668
static void
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   669
add_device(const int iscapture, const char *name, const char *_desc)
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   670
{
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   671
    char *desc = SDL_strdup(_desc);
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   672
    char *handle = NULL;
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   673
    char *ptr;
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   674
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   675
    if (!desc) {
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   676
        return;
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   677
    }
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   678
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   679
    /* some strings have newlines, like "HDA NVidia, HDMI 0\nHDMI Audio Output" */
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   680
    for (ptr = strchr(desc, '\n'); ptr; ptr = strchr(ptr + 1, '\n')) {
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   681
        *ptr = ' ';
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   682
    }
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   683
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   684
    handle = SDL_strdup(name);
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   685
    if (handle != NULL) {
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   686
        SDL_AddAudioDevice(iscapture, desc, handle);
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   687
    }
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   688
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   689
    SDL_free(desc);
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   690
}
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   691
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   692
static void
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   693
ALSA_DetectDevices(void)
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   694
{
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   695
    void **hints = NULL;
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   696
    int i;
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   697
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   698
    /* !!! FIXME: use udev instead. */
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   699
    /* We won't deal with disconnects and hotplugs without udev, but at least
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   700
       you'll get a reasonable device list at startup. */
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   701
#if 1 /*!SDL_USE_LIBUDEV */
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   702
    if (ALSA_snd_device_name_hint(-1, "pcm", &hints) == -1) {
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   703
        return;  /* oh well. */
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   704
    }
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   705
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   706
    for (i = 0; hints[i]; i++) {
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   707
        char *name = ALSA_snd_device_name_get_hint(hints[i], "NAME");
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   708
        char *desc = ALSA_snd_device_name_get_hint(hints[i], "DESC");
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   709
        char *ioid = ALSA_snd_device_name_get_hint(hints[i], "IOID");
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   710
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   711
        if ((ioid == NULL) || (SDL_strcmp(ioid, "Output") == 0)) {
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   712
            add_device(SDL_FALSE, name, desc);
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   713
        }
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   714
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   715
        if ((ioid == NULL) || (SDL_strcmp(ioid, "Input") == 0)) {
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   716
            add_device(SDL_TRUE, name, desc);
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   717
        }
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   718
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   719
        free(name);
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   720
        free(desc);
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   721
        free(ioid);
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   722
    }
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   723
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   724
    ALSA_snd_device_name_free_hint(hints);
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   725
#else
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   726
#error Fill in udev support here.
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   727
#endif
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   728
}
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   729
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   730
static void
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   731
ALSA_FreeDeviceHandle(void *handle)
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   732
{
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   733
#if 1 /*!SDL_USE_LIBUDEV*/
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   734
    SDL_free(handle);
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   735
#else
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   736
#error Fill in udev support here.
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   737
#endif
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   738
}
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   739
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   740
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   741
static int
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
   742
ALSA_Init(SDL_AudioDriverImpl * impl)
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   743
{
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   744
    if (LoadALSALibrary() < 0) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   745
        return 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   746
    }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   747
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   748
    /* Set the function pointers */
10104
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   749
    impl->DetectDevices = ALSA_DetectDevices;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   750
    impl->OpenDevice = ALSA_OpenDevice;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   751
    impl->WaitDevice = ALSA_WaitDevice;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   752
    impl->GetDeviceBuf = ALSA_GetDeviceBuf;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   753
    impl->PlayDevice = ALSA_PlayDevice;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   754
    impl->CloseDevice = ALSA_CloseDevice;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   755
    impl->Deinitialize = ALSA_Deinitialize;
10104
4cd67316b308 alsa: Implemented basic device detection.
Ryan C. Gordon <icculus@icculus.org>
parents: 9998
diff changeset
   756
    impl->FreeDeviceHandle = ALSA_FreeDeviceHandle;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   757
3699
4160ba33b597 Removed test for "driver is valid, but doesn't see any audio devices."
Ryan C. Gordon <icculus@icculus.org>
parents: 3697
diff changeset
   758
    return 1;   /* this audio target is available. */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   759
}
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   760
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   761
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   762
AudioBootStrap ALSA_bootstrap = {
5594
e741303e08a8 Removed needless macros in various audio targets.
Ryan C. Gordon <icculus@icculus.org>
parents: 5535
diff changeset
   763
    "alsa", "ALSA PCM audio", ALSA_Init, 0
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   764
};
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   765
6044
35448a5ea044 Lots of fixes importing SDL source wholesale into a new iOS project
Sam Lantinga <slouken@libsdl.org>
parents: 5622
diff changeset
   766
#endif /* SDL_AUDIO_DRIVER_ALSA */
35448a5ea044 Lots of fixes importing SDL source wholesale into a new iOS project
Sam Lantinga <slouken@libsdl.org>
parents: 5622
diff changeset
   767
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
   768
/* vi: set ts=4 sw=4 expandtab: */