src/audio/paudio/SDL_paudio.c
author Sam Lantinga <slouken@libsdl.org>
Sun, 28 May 2006 13:04:16 +0000
branchSDL-1.3
changeset 1662 782fd950bd46
parent 1402 d910939febfa
child 1668 4da1ee79c9af
permissions -rw-r--r--
Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. WARNING: None of the video drivers have been updated for the new API yet! The API is still under design and very fluid. The code is now run through a consistent indent format: indent -i4 -nut -nsc -br -ce The headers are being converted to automatically generate doxygen documentation.
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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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    Carsten Griwodz
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    griff@kom.tu-darmstadt.de
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    based on linux/SDL_dspaudio.c by Sam Lantinga
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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 <errno.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/time.h>
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#include <sys/ioctl.h>
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#include <sys/stat.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_audiodev_c.h"
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#include "SDL_paudio.h"
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#define DEBUG_AUDIO 1
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/* A conflict within AIX 4.3.3 <sys/> headers and probably others as well.
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 * I guess nobody ever uses audio... Shame over AIX header files.  */
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#include <sys/machine.h>
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#undef BIG_ENDIAN
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#include <sys/audio.h>
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/* The tag name used by paud audio */
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#define Paud_DRIVER_NAME         "paud"
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/* Open the audio device for playback, and don't block if busy */
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/* #define OPEN_FLAGS	(O_WRONLY|O_NONBLOCK) */
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#define OPEN_FLAGS	O_WRONLY
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/* Audio driver functions */
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static int Paud_OpenAudio (_THIS, SDL_AudioSpec * spec);
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static void Paud_WaitAudio (_THIS);
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static void Paud_PlayAudio (_THIS);
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static Uint8 *Paud_GetAudioBuf (_THIS);
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static void Paud_CloseAudio (_THIS);
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/* Audio driver bootstrap functions */
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static int
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Audio_Available (void)
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{
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    int fd;
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    int available;
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    available = 0;
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    fd = SDL_OpenAudioPath (NULL, 0, OPEN_FLAGS, 0);
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    if (fd >= 0) {
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        available = 1;
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        close (fd);
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    }
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    return (available);
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}
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static void
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Audio_DeleteDevice (SDL_AudioDevice * device)
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{
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    SDL_free (device->hidden);
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    SDL_free (device);
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}
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static SDL_AudioDevice *
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Audio_CreateDevice (int devindex)
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{
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    SDL_AudioDevice *this;
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    /* Initialize all variables that we clean on shutdown */
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    this = (SDL_AudioDevice *) SDL_malloc (sizeof (SDL_AudioDevice));
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    if (this) {
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        SDL_memset (this, 0, (sizeof *this));
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        this->hidden = (struct SDL_PrivateAudioData *)
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            SDL_malloc ((sizeof *this->hidden));
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    }
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    if ((this == NULL) || (this->hidden == NULL)) {
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        SDL_OutOfMemory ();
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        if (this) {
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            SDL_free (this);
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        }
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        return (0);
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    }
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    SDL_memset (this->hidden, 0, (sizeof *this->hidden));
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    audio_fd = -1;
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    /* Set the function pointers */
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    this->OpenAudio = Paud_OpenAudio;
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    this->WaitAudio = Paud_WaitAudio;
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    this->PlayAudio = Paud_PlayAudio;
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    this->GetAudioBuf = Paud_GetAudioBuf;
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    this->CloseAudio = Paud_CloseAudio;
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    this->free = Audio_DeleteDevice;
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    return this;
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}
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AudioBootStrap Paud_bootstrap = {
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    Paud_DRIVER_NAME, "AIX Paudio",
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    Audio_Available, Audio_CreateDevice
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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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Paud_WaitAudio (_THIS)
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{
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    fd_set fdset;
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    /* See if we need to use timed audio synchronization */
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    if (frame_ticks) {
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        /* Use timer for general audio synchronization */
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        Sint32 ticks;
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        ticks = ((Sint32) (next_frame - SDL_GetTicks ())) - FUDGE_TICKS;
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        if (ticks > 0) {
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            SDL_Delay (ticks);
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        }
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    } else {
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        audio_buffer paud_bufinfo;
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        /* Use select() for audio synchronization */
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        struct timeval timeout;
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        FD_ZERO (&fdset);
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        FD_SET (audio_fd, &fdset);
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        if (ioctl (audio_fd, AUDIO_BUFFER, &paud_bufinfo) < 0) {
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#ifdef DEBUG_AUDIO
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            fprintf (stderr, "Couldn't get audio buffer information\n");
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#endif
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            timeout.tv_sec = 10;
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            timeout.tv_usec = 0;
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        } else {
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            long ms_in_buf = paud_bufinfo.write_buf_time;
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            timeout.tv_sec = ms_in_buf / 1000;
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            ms_in_buf = ms_in_buf - timeout.tv_sec * 1000;
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            timeout.tv_usec = ms_in_buf * 1000;
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#ifdef DEBUG_AUDIO
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            fprintf (stderr,
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                     "Waiting for write_buf_time=%ld,%ld\n",
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                     timeout.tv_sec, timeout.tv_usec);
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#endif
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        }
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#ifdef DEBUG_AUDIO
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        fprintf (stderr, "Waiting for audio to get ready\n");
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#endif
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        if (select (audio_fd + 1, NULL, &fdset, NULL, &timeout) <= 0) {
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            const char *message =
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                "Audio timeout - buggy audio driver? (disabled)";
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            /*
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             * In general we should never print to the screen,
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             * but in this case we have no other way of letting
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             * the user know what happened.
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             */
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            fprintf (stderr, "SDL: %s - %s\n", strerror (errno), message);
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            this->enabled = 0;
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            /* Don't try to close - may hang */
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            audio_fd = -1;
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#ifdef DEBUG_AUDIO
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            fprintf (stderr, "Done disabling audio\n");
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#endif
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        }
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#ifdef DEBUG_AUDIO
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        fprintf (stderr, "Ready!\n");
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#endif
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    }
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}
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static void
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Paud_PlayAudio (_THIS)
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{
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    int written;
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    /* Write the audio data, checking for EAGAIN on broken audio drivers */
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    do {
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        written = write (audio_fd, mixbuf, mixlen);
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        if ((written < 0) && ((errno == 0) || (errno == EAGAIN))) {
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            SDL_Delay (1);      /* Let a little CPU time go by */
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        }
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    }
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    while ((written < 0) &&
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           ((errno == 0) || (errno == EAGAIN) || (errno == EINTR)));
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    /* If timer synchronization is enabled, set the next write frame */
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    if (frame_ticks) {
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        next_frame += frame_ticks;
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    }
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    /* If we couldn't write, assume fatal error for now */
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    if (written < 0) {
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        this->enabled = 0;
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    }
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#ifdef DEBUG_AUDIO
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    fprintf (stderr, "Wrote %d bytes of audio data\n", written);
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#endif
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}
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static Uint8 *
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Paud_GetAudioBuf (_THIS)
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{
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    return mixbuf;
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}
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static void
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Paud_CloseAudio (_THIS)
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{
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    if (mixbuf != NULL) {
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        SDL_FreeAudioMem (mixbuf);
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        mixbuf = NULL;
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    }
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    if (audio_fd >= 0) {
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        close (audio_fd);
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        audio_fd = -1;
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    }
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}
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static int
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Paud_OpenAudio (_THIS, SDL_AudioSpec * spec)
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{
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    char audiodev[1024];
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    int format;
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    int bytes_per_sample;
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   247
    Uint16 test_format;
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    audio_init paud_init;
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    audio_buffer paud_bufinfo;
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    audio_status paud_status;
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    audio_control paud_control;
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    audio_change paud_change;
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   254
    /* Reset the timer synchronization flag */
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    frame_ticks = 0.0;
0
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   256
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   257
    /* Open the audio device */
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   258
    audio_fd = SDL_OpenAudioPath (audiodev, sizeof (audiodev), OPEN_FLAGS, 0);
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   259
    if (audio_fd < 0) {
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   260
        SDL_SetError ("Couldn't open %s: %s", audiodev, strerror (errno));
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   261
        return -1;
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   262
    }
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   263
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   264
    /*
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   265
     * We can't set the buffer size - just ask the device for the maximum
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   266
     * that we can have.
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   267
     */
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   268
    if (ioctl (audio_fd, AUDIO_BUFFER, &paud_bufinfo) < 0) {
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   269
        SDL_SetError ("Couldn't get audio buffer information");
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   270
        return -1;
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   271
    }
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   272
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   273
    mixbuf = NULL;
0
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   274
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   275
    if (spec->channels > 1)
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   276
        spec->channels = 2;
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   277
    else
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        spec->channels = 1;
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   280
    /*
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   281
     * Fields in the audio_init structure:
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   282
     *
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   283
     * Ignored by us:
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   284
     *
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   285
     * paud.loadpath[LOAD_PATH]; * DSP code to load, MWave chip only?
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   286
     * paud.slot_number;         * slot number of the adapter
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   287
     * paud.device_id;           * adapter identification number
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   288
     *
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   289
     * Input:
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   290
     *
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   291
     * paud.srate;           * the sampling rate in Hz
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   292
     * paud.bits_per_sample; * 8, 16, 32, ...
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diff changeset
   293
     * paud.bsize;           * block size for this rate
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   294
     * paud.mode;            * ADPCM, PCM, MU_LAW, A_LAW, SOURCE_MIX
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   295
     * paud.channels;        * 1=mono, 2=stereo
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diff changeset
   296
     * paud.flags;           * FIXED - fixed length data
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   297
     *                       * LEFT_ALIGNED, RIGHT_ALIGNED (var len only)
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   298
     *                       * TWOS_COMPLEMENT - 2's complement data
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   299
     *                       * SIGNED - signed? comment seems wrong in sys/audio.h
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   300
     *                       * BIG_ENDIAN
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diff changeset
   301
     * paud.operation;       * PLAY, RECORD
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diff changeset
   302
     *
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diff changeset
   303
     * Output:
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diff changeset
   304
     *
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   305
     * paud.flags;           * PITCH            - pitch is supported
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   306
     *                       * INPUT            - input is supported
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   307
     *                       * OUTPUT           - output is supported
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   308
     *                       * MONITOR          - monitor is supported
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   309
     *                       * VOLUME           - volume is supported
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   310
     *                       * VOLUME_DELAY     - volume delay is supported
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diff changeset
   311
     *                       * BALANCE          - balance is supported
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diff changeset
   312
     *                       * BALANCE_DELAY    - balance delay is supported
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   313
     *                       * TREBLE           - treble control is supported
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diff changeset
   314
     *                       * BASS             - bass control is supported
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diff changeset
   315
     *                       * BESTFIT_PROVIDED - best fit returned
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diff changeset
   316
     *                       * LOAD_CODE        - DSP load needed
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diff changeset
   317
     * paud.rc;              * NO_PLAY         - DSP code can't do play requests
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diff changeset
   318
     *                       * NO_RECORD       - DSP code can't do record requests
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diff changeset
   319
     *                       * INVALID_REQUEST - request was invalid
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diff changeset
   320
     *                       * CONFLICT        - conflict with open's flags
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diff changeset
   321
     *                       * OVERLOADED      - out of DSP MIPS or memory
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diff changeset
   322
     * paud.position_resolution; * smallest increment for position
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diff changeset
   323
     */
0
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parents:
diff changeset
   324
1662
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diff changeset
   325
    paud_init.srate = spec->freq;
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diff changeset
   326
    paud_init.mode = PCM;
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diff changeset
   327
    paud_init.operation = PLAY;
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diff changeset
   328
    paud_init.channels = spec->channels;
0
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diff changeset
   329
1662
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diff changeset
   330
    /* Try for a closest match on audio format */
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diff changeset
   331
    format = 0;
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diff changeset
   332
    for (test_format = SDL_FirstAudioFormat (spec->format);
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diff changeset
   333
         !format && test_format;) {
0
74212992fb08 Initial revision
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diff changeset
   334
#ifdef DEBUG_AUDIO
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
   335
        fprintf (stderr, "Trying format 0x%4.4x\n", test_format);
0
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diff changeset
   336
#endif
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
   337
        switch (test_format) {
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diff changeset
   338
        case AUDIO_U8:
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diff changeset
   339
            bytes_per_sample = 1;
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diff changeset
   340
            paud_init.bits_per_sample = 8;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
   341
            paud_init.flags = TWOS_COMPLEMENT | FIXED;
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diff changeset
   342
            format = 1;
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diff changeset
   343
            break;
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diff changeset
   344
        case AUDIO_S8:
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diff changeset
   345
            bytes_per_sample = 1;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
   346
            paud_init.bits_per_sample = 8;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
   347
            paud_init.flags = SIGNED | TWOS_COMPLEMENT | FIXED;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
   348
            format = 1;
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diff changeset
   349
            break;
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diff changeset
   350
        case AUDIO_S16LSB:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
   351
            bytes_per_sample = 2;
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diff changeset
   352
            paud_init.bits_per_sample = 16;
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diff changeset
   353
            paud_init.flags = SIGNED | TWOS_COMPLEMENT | FIXED;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
   354
            format = 1;
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diff changeset
   355
            break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
   356
        case AUDIO_S16MSB:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
   357
            bytes_per_sample = 2;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
   358
            paud_init.bits_per_sample = 16;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
   359
            paud_init.flags = BIG_ENDIAN | SIGNED | TWOS_COMPLEMENT | FIXED;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   360
            format = 1;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   361
            break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   362
        case AUDIO_U16LSB:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   363
            bytes_per_sample = 2;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   364
            paud_init.bits_per_sample = 16;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   365
            paud_init.flags = TWOS_COMPLEMENT | FIXED;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   366
            format = 1;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   367
            break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   368
        case AUDIO_U16MSB:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   369
            bytes_per_sample = 2;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   370
            paud_init.bits_per_sample = 16;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   371
            paud_init.flags = BIG_ENDIAN | TWOS_COMPLEMENT | FIXED;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   372
            format = 1;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   373
            break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   374
        default:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   375
            break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   376
        }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   377
        if (!format) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   378
            test_format = SDL_NextAudioFormat ();
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   379
        }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   380
    }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   381
    if (format == 0) {
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   382
#ifdef DEBUG_AUDIO
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   383
        fprintf (stderr, "Couldn't find any hardware audio formats\n");
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   384
#endif
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   385
        SDL_SetError ("Couldn't find any hardware audio formats");
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   386
        return -1;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   387
    }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   388
    spec->format = test_format;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   389
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   390
    /*
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   391
     * We know the buffer size and the max number of subsequent writes
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   392
     * that can be pending. If more than one can pend, allow the application
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   393
     * to do something like double buffering between our write buffer and
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   394
     * the device's own buffer that we are filling with write() anyway.
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   395
     *
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   396
     * We calculate spec->samples like this because SDL_CalculateAudioSpec()
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   397
     * will give put paud_bufinfo.write_buf_cap (or paud_bufinfo.write_buf_cap/2)
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   398
     * into spec->size in return.
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   399
     */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   400
    if (paud_bufinfo.request_buf_cap == 1) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   401
        spec->samples = paud_bufinfo.write_buf_cap
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   402
            / bytes_per_sample / spec->channels;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   403
    } else {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   404
        spec->samples = paud_bufinfo.write_buf_cap
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   405
            / bytes_per_sample / spec->channels / 2;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   406
    }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   407
    paud_init.bsize = bytes_per_sample * spec->channels;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   408
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   409
    SDL_CalculateAudioSpec (spec);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   410
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   411
    /*
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   412
     * The AIX paud device init can't modify the values of the audio_init
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   413
     * structure that we pass to it. So we don't need any recalculation
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   414
     * of this stuff and no reinit call as in linux dsp and dma code.
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   415
     *
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   416
     * /dev/paud supports all of the encoding formats, so we don't need
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   417
     * to do anything like reopening the device, either.
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   418
     */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   419
    if (ioctl (audio_fd, AUDIO_INIT, &paud_init) < 0) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   420
        switch (paud_init.rc) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   421
        case 1:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   422
            SDL_SetError
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   423
                ("Couldn't set audio format: DSP can't do play requests");
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   424
            return -1;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   425
            break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   426
        case 2:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   427
            SDL_SetError
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   428
                ("Couldn't set audio format: DSP can't do record requests");
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   429
            return -1;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   430
            break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   431
        case 4:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   432
            SDL_SetError ("Couldn't set audio format: request was invalid");
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   433
            return -1;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   434
            break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   435
        case 5:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   436
            SDL_SetError
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   437
                ("Couldn't set audio format: conflict with open's flags");
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   438
            return -1;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   439
            break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   440
        case 6:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   441
            SDL_SetError
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   442
                ("Couldn't set audio format: out of DSP MIPS or memory");
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   443
            return -1;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   444
            break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   445
        default:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   446
            SDL_SetError
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   447
                ("Couldn't set audio format: not documented in sys/audio.h");
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   448
            return -1;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   449
            break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   450
        }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   451
    }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   452
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   453
    /* Allocate mixing buffer */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   454
    mixlen = spec->size;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   455
    mixbuf = (Uint8 *) SDL_AllocAudioMem (mixlen);
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   456
    if (mixbuf == NULL) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   457
        return -1;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   458
    }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   459
    SDL_memset (mixbuf, spec->silence, spec->size);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   460
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   461
    /*
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   462
     * Set some paramters: full volume, first speaker that we can find.
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   463
     * Ignore the other settings for now.
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   464
     */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   465
    paud_change.input = AUDIO_IGNORE;   /* the new input source */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   466
    paud_change.output = OUTPUT_1;      /* EXTERNAL_SPEAKER,INTERNAL_SPEAKER,OUTPUT_1 */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   467
    paud_change.monitor = AUDIO_IGNORE; /* the new monitor state */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   468
    paud_change.volume = 0x7fffffff;    /* volume level [0-0x7fffffff] */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   469
    paud_change.volume_delay = AUDIO_IGNORE;    /* the new volume delay */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   470
    paud_change.balance = 0x3fffffff;   /* the new balance */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   471
    paud_change.balance_delay = AUDIO_IGNORE;   /* the new balance delay */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   472
    paud_change.treble = AUDIO_IGNORE;  /* the new treble state */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   473
    paud_change.bass = AUDIO_IGNORE;    /* the new bass state */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   474
    paud_change.pitch = AUDIO_IGNORE;   /* the new pitch state */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   475
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   476
    paud_control.ioctl_request = AUDIO_CHANGE;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   477
    paud_control.request_info = (char *) &paud_change;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   478
    if (ioctl (audio_fd, AUDIO_CONTROL, &paud_control) < 0) {
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   479
#ifdef DEBUG_AUDIO
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   480
        fprintf (stderr, "Can't change audio display settings\n");
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   481
#endif
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   482
    }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   483
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   484
    /*
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   485
     * Tell the device to expect data. Actual start will wait for
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   486
     * the first write() call.
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   487
     */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   488
    paud_control.ioctl_request = AUDIO_START;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   489
    paud_control.position = 0;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   490
    if (ioctl (audio_fd, AUDIO_CONTROL, &paud_control) < 0) {
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   491
#ifdef DEBUG_AUDIO
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   492
        fprintf (stderr, "Can't start audio play\n");
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   493
#endif
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   494
        SDL_SetError ("Can't start audio play");
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   495
        return -1;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   496
    }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   497
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   498
    /* Check to see if we need to use select() workaround */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   499
    {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   500
        char *workaround;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   501
        workaround = SDL_getenv ("SDL_DSP_NOSELECT");
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   502
        if (workaround) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   503
            frame_ticks = (float) (spec->samples * 1000) / spec->freq;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   504
            next_frame = SDL_GetTicks () + frame_ticks;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   505
        }
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   506
    }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   507
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   508
    /* Get the parent process id (we're the parent of the audio thread) */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   509
    parent = getpid ();
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   510
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   511
    /* We're ready to rock and roll. :-) */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   512
    return 0;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   513
}
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   514
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
   515
/* vi: set ts=4 sw=4 expandtab: */