src/audio/nas/SDL_nasaudio.c
author Aaron Wishnick <schnarf@gmail.com>
Tue, 12 Aug 2008 00:50:58 +0000
branchgsoc2008_audio_resampling
changeset 2664 344c8da164f4
parent 2060 866052b01ee5
child 2859 99210400e8b9
permissions -rw-r--r--
Added streamer code. I haven't yet incorporated it into SDL_RunAudio() though.
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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 1997-2006 Sam Lantinga
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    This library is free software; you can redistribute it and/or
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    modify it under the terms of the GNU Lesser General Public
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    License as published by the Free Software Foundation; either
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    version 2.1 of the License, or (at your option) any later version.
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    This library is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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    Lesser General Public License for more details.
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    You should have received a copy of the GNU Lesser General Public
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    License along with this library; if not, write to the Free Software
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    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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    Sam Lantinga
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    slouken@libsdl.org
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    This driver was written by:
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    Erik Inge Bolsų
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    knan@mo.himolde.no
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*/
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#include "SDL_config.h"
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/* Allow access to a raw mixing buffer */
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#include <signal.h>
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#include <unistd.h>
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#include "SDL_timer.h"
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#include "SDL_audio.h"
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#include "SDL_loadso.h"
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#include "../SDL_audiomem.h"
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#include "../SDL_audio_c.h"
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#include "SDL_nasaudio.h"
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/* The tag name used by nas audio */
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#define NAS_DRIVER_NAME         "nas"
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static struct SDL_PrivateAudioData *this2 = NULL;
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static void (*NAS_AuCloseServer) (AuServer *);
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static void (*NAS_AuNextEvent) (AuServer *, AuBool, AuEvent *);
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static AuBool(*NAS_AuDispatchEvent) (AuServer *, AuEvent *);
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static AuFlowID(*NAS_AuCreateFlow) (AuServer *, AuStatus *);
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static void (*NAS_AuStartFlow) (AuServer *, AuFlowID, AuStatus *);
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static void (*NAS_AuSetElements)
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  (AuServer *, AuFlowID, AuBool, int, AuElement *, AuStatus *);
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static void (*NAS_AuWriteElement)
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  (AuServer *, AuFlowID, int, AuUint32, AuPointer, AuBool, AuStatus *);
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static AuServer *(*NAS_AuOpenServer)
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  (_AuConst char *, int, _AuConst char *, int, _AuConst char *, char **);
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static AuEventHandlerRec *(*NAS_AuRegisterEventHandler)
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  (AuServer *, AuMask, int, AuID, AuEventHandlerCallback, AuPointer);
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#ifdef SDL_AUDIO_DRIVER_NAS_DYNAMIC
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static const char *nas_library = SDL_AUDIO_DRIVER_NAS_DYNAMIC;
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static void *nas_handle = NULL;
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static int
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load_nas_sym(const char *fn, void **addr)
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{
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    *addr = SDL_LoadFunction(nas_handle, fn);
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    if (*addr == NULL) {
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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_NAS_SYM(x) \
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    if (!load_nas_sym(#x, (void **) (char *) &NAS_##x)) return -1
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#else
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#define SDL_NAS_SYM(x) NAS_##x = x
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#endif
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static int
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load_nas_syms(void)
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{
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    SDL_NAS_SYM(AuCloseServer);
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    SDL_NAS_SYM(AuNextEvent);
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    SDL_NAS_SYM(AuDispatchEvent);
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    SDL_NAS_SYM(AuCreateFlow);
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    SDL_NAS_SYM(AuStartFlow);
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    SDL_NAS_SYM(AuSetElements);
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    SDL_NAS_SYM(AuWriteElement);
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    SDL_NAS_SYM(AuOpenServer);
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    SDL_NAS_SYM(AuRegisterEventHandler);
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    return 0;
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}
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#undef SDL_NAS_SYM
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#ifdef SDL_AUDIO_DRIVER_NAS_DYNAMIC
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static void
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UnloadNASLibrary(void)
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{
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    if (nas_handle != NULL) {
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        SDL_UnloadObject(nas_handle);
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        nas_handle = NULL;
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    }
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}
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static int
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LoadNASLibrary(void)
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{
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    int retval = 0;
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    if (nas_handle == NULL) {
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        nas_handle = SDL_LoadObject(nas_library);
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        if (nas_handle == NULL) {
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            /* Copy error string so we can use it in a new SDL_SetError(). */
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            char *origerr = SDL_GetError();
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            size_t len = SDL_strlen(origerr) + 1;
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            char *err = (char *) alloca(len);
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            SDL_strlcpy(err, origerr, len);
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            retval = -1;
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            SDL_SetError("NAS: SDL_LoadObject('%s') failed: %s\n",
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                         nas_library, err);
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        } else {
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            retval = load_nas_syms();
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            if (retval < 0) {
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                UnloadNASLibrary();
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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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UnloadNASLibrary(void)
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{
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}
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static int
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LoadNASLibrary(void)
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{
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    load_nas_syms();
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    return 0;
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}
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#endif /* SDL_AUDIO_DRIVER_NAS_DYNAMIC */
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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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NAS_WaitDevice(_THIS)
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{
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    while (this->hidden->buf_free < this->hidden->mixlen) {
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        AuEvent ev;
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        NAS_AuNextEvent(this->hidden->aud, AuTrue, &ev);
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        NAS_AuDispatchEvent(this->hidden->aud, &ev);
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    }
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}
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static void
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NAS_PlayDevice(_THIS)
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{
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    while (this->hidden->mixlen > this->hidden->buf_free) {
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        /*
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         * We think the buffer is full? Yikes! Ask the server for events,
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         *  in the hope that some of them is LowWater events telling us more
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         *  of the buffer is free now than what we think.
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         */
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        AuEvent ev;
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        NAS_AuNextEvent(this->hidden->aud, AuTrue, &ev);
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        NAS_AuDispatchEvent(this->hidden->aud, &ev);
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    }
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    this->hidden->buf_free -= this->hidden->mixlen;
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    /* Write the audio data */
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    NAS_AuWriteElement(this->hidden->aud, this->hidden->flow, 0,
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                       this->hidden->mixlen, this->hidden->mixbuf, AuFalse,
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                       NULL);
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    this->hidden->written += this->hidden->mixlen;
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#ifdef DEBUG_AUDIO
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    fprintf(stderr, "Wrote %d bytes of audio data\n", this->hidden->mixlen);
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#endif
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}
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static Uint8 *
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NAS_GetDeviceBuf(_THIS)
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{
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    return (this->hidden->mixbuf);
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}
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static void
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NAS_CloseDevice(_THIS)
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{
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    if (this->hidden != NULL) {
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        if (this->hidden->mixbuf != NULL) {
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            SDL_FreeAudioMem(this->hidden->mixbuf);
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            this->hidden->mixbuf = NULL;
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        }
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        if (this->hidden->aud) {
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            NAS_AuCloseServer(this->hidden->aud);
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            this->hidden->aud = 0;
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        }
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        SDL_free(this->hidden);
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        this2 = this->hidden = NULL;
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    }
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}
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static unsigned char
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sdlformat_to_auformat(unsigned int fmt)
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{
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    switch (fmt) {
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    case AUDIO_U8:
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        return AuFormatLinearUnsigned8;
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    case AUDIO_S8:
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        return AuFormatLinearSigned8;
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    case AUDIO_U16LSB:
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        return AuFormatLinearUnsigned16LSB;
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    case AUDIO_U16MSB:
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        return AuFormatLinearUnsigned16MSB;
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    case AUDIO_S16LSB:
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        return AuFormatLinearSigned16LSB;
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    case AUDIO_S16MSB:
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        return AuFormatLinearSigned16MSB;
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    }
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    return AuNone;
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}
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static AuBool
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event_handler(AuServer * aud, AuEvent * ev, AuEventHandlerRec * hnd)
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{
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    switch (ev->type) {
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    case AuEventTypeElementNotify:
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        {
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            AuElementNotifyEvent *event = (AuElementNotifyEvent *) ev;
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            switch (event->kind) {
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            case AuElementNotifyKindLowWater:
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                if (this2->buf_free >= 0) {
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                    this2->really += event->num_bytes;
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                    gettimeofday(&this2->last_tv, 0);
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                    this2->buf_free += event->num_bytes;
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                } else {
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   248
                    this2->buf_free = event->num_bytes;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   249
                }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   250
                break;
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diff changeset
   251
            case AuElementNotifyKindState:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   252
                switch (event->cur_state) {
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diff changeset
   253
                case AuStatePause:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1402
diff changeset
   254
                    if (event->reason != AuReasonUser) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1402
diff changeset
   255
                        if (this2->buf_free >= 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1402
diff changeset
   256
                            this2->really += event->num_bytes;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1402
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   257
                            gettimeofday(&this2->last_tv, 0);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1402
diff changeset
   258
                            this2->buf_free += event->num_bytes;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1402
diff changeset
   259
                        } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   260
                            this2->buf_free = event->num_bytes;
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diff changeset
   261
                        }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1402
diff changeset
   262
                    }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   263
                    break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1402
diff changeset
   264
                }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1402
diff changeset
   265
            }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   266
        }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   267
    }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   268
    return AuTrue;
0
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parents:
diff changeset
   269
}
74212992fb08 Initial revision
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parents:
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   270
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parents:
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   271
static AuDeviceID
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   272
find_device(_THIS, int nch)
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   273
{
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   274
    /* These "Au" things are all macros, not functions... */
1895
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   275
    int i;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   276
    for (i = 0; i < AuServerNumDevices(this->hidden->aud); i++) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1402
diff changeset
   277
        if ((AuDeviceKind(AuServerDevice(this->hidden->aud, i)) ==
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   278
             AuComponentKindPhysicalOutput) &&
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   279
            AuDeviceNumTracks(AuServerDevice(this->hidden->aud, i)) == nch) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   280
            return AuDeviceIdentifier(AuServerDevice(this->hidden->aud, i));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   281
        }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   282
    }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   283
    return AuNone;
0
74212992fb08 Initial revision
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parents:
diff changeset
   284
}
74212992fb08 Initial revision
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parents:
diff changeset
   285
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   286
static int
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents: 1982
diff changeset
   287
NAS_OpenDevice(_THIS, const char *devname, int iscapture)
0
74212992fb08 Initial revision
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parents:
diff changeset
   288
{
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   289
    AuElement elms[3];
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1402
diff changeset
   290
    int buffer_size;
1982
3b4ce57c6215 First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
   291
    SDL_AudioFormat test_format, format;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1402
diff changeset
   292
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5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   293
    /* 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: 1982
diff changeset
   294
    this->hidden = (struct SDL_PrivateAudioData *)
2060
866052b01ee5 indent is evil
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diff changeset
   295
        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: 1982
diff changeset
   296
    if (this->hidden == NULL) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   297
        SDL_OutOfMemory();
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   298
        return 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   299
    }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   300
    SDL_memset(this->hidden, 0, (sizeof *this->hidden));
0
74212992fb08 Initial revision
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parents:
diff changeset
   301
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   302
    /* 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: 1402
diff changeset
   303
    format = 0;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   304
    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: 1402
diff changeset
   305
         !format && 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: 1402
diff changeset
   306
        format = sdlformat_to_auformat(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: 1402
diff changeset
   307
        if (format == AuNone) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   308
            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: 1402
diff changeset
   309
        }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   310
    }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   311
    if (format == 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   312
        NAS_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   313
        SDL_SetError("NAS: Couldn't find any hardware audio formats");
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   314
        return 0;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1402
diff changeset
   315
    }
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   316
    this->spec.format = test_format;
0
74212992fb08 Initial revision
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parents:
diff changeset
   317
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   318
    this->hidden->aud = NAS_AuOpenServer("", 0, NULL, 0, NULL, 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: 1402
diff changeset
   319
    if (this->hidden->aud == 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   320
        NAS_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   321
        SDL_SetError("NAS: Couldn't open connection to NAS server");
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   322
        return 0;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1402
diff changeset
   323
    }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   324
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   325
    this->hidden->dev = find_device(this, 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: 1402
diff changeset
   326
    if ((this->hidden->dev == AuNone)
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   327
        || (!(this->hidden->flow = NAS_AuCreateFlow(this->hidden->aud, 0)))) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   328
        NAS_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   329
        SDL_SetError("NAS: Couldn't find a fitting device on NAS server");
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   330
        return 0;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   331
    }
0
74212992fb08 Initial revision
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parents:
diff changeset
   332
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   333
    buffer_size = this->spec.freq;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   334
    if (buffer_size < 4096)
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   335
        buffer_size = 4096;
0
74212992fb08 Initial revision
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parents:
diff changeset
   336
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   337
    if (buffer_size > 32768)
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   338
        buffer_size = 32768;    /* So that the buffer won't get unmanageably big. */
0
74212992fb08 Initial revision
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parents:
diff changeset
   339
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1402
diff changeset
   340
    /* 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: 1982
diff changeset
   341
    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: 1402
diff changeset
   342
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   343
    this2 = this->hidden;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   344
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
   345
    AuMakeElementImportClient(elms, this->spec.freq, format,
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
   346
                              this->spec.channels, AuTrue, buffer_size,
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
   347
                              buffer_size / 4, 0, NULL);
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   348
    AuMakeElementExportDevice(elms + 1, 0, this->hidden->dev, this->spec.freq,
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1402
diff changeset
   349
                              AuUnlimitedSamples, 0, NULL);
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
   350
    NAS_AuSetElements(this->hidden->aud, this->hidden->flow, AuTrue, 2, elms,
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
   351
                      NULL);
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   352
    NAS_AuRegisterEventHandler(this->hidden->aud, AuEventHandlerIDMask, 0,
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   353
                               this->hidden->flow, event_handler,
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   354
                               (AuPointer) NULL);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   355
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   356
    NAS_AuStartFlow(this->hidden->aud, this->hidden->flow, NULL);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   357
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   358
    /* Allocate mixing buffer */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   359
    this->hidden->mixlen = this->spec.size;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   360
    this->hidden->mixbuf = (Uint8 *) SDL_AllocAudioMem(this->hidden->mixlen);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   361
    if (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: 1982
diff changeset
   362
        NAS_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   363
        SDL_OutOfMemory();
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   364
        return 0;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   365
    }
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   366
    SDL_memset(this->hidden->mixbuf, this->spec.silence, this->spec.size);
0
74212992fb08 Initial revision
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parents:
diff changeset
   367
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   368
    /* We're ready to rock and roll. :-) */
2049
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   369
    return 1;
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   370
}
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parents: 1982
diff changeset
   371
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diff changeset
   372
static void
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diff changeset
   373
NAS_Deinitialize(void)
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diff changeset
   374
{
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parents: 1982
diff changeset
   375
    UnloadNASLibrary();
0
74212992fb08 Initial revision
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   376
}
1895
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parents: 1402
diff changeset
   377
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diff changeset
   378
static int
2060
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   379
NAS_Init(SDL_AudioDriverImpl * impl)
2049
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parents: 1982
diff changeset
   380
{
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   381
    if (LoadNASLibrary() < 0) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   382
        return 0;
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   383
    } else {
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   384
        AuServer *aud = NAS_AuOpenServer("", 0, NULL, 0, NULL, NULL);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   385
        if (aud == NULL) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   386
            SDL_SetError("NAS: AuOpenServer() failed (no audio server?)");
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   387
            return 0;
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   388
        }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   389
        NAS_AuCloseServer(aud);
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Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   390
    }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   391
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   392
    /* Set the function pointers */
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   393
    impl->OpenDevice = NAS_OpenDevice;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   394
    impl->PlayDevice = NAS_PlayDevice;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   395
    impl->WaitDevice = NAS_WaitDevice;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   396
    impl->GetDeviceBuf = NAS_GetDeviceBuf;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   397
    impl->CloseDevice = NAS_CloseDevice;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   398
    impl->Deinitialize = NAS_Deinitialize;
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parents: 2049
diff changeset
   399
    impl->OnlyHasDefaultOutputDevice = 1;       /* !!! FIXME: is this true? */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   400
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   401
    return 1;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   402
}
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   403
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   404
AudioBootStrap NAS_bootstrap = {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   405
    NAS_DRIVER_NAME, "Network Audio System", NAS_Init, 0
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   406
};
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   407
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1402
diff changeset
   408
/* vi: set ts=4 sw=4 expandtab: */