From d8239786b306ffda6d5d73753d01f0ad3358e1a0 Mon Sep 17 00:00:00 2001 From: Jesse Hall Date: Tue, 17 Jul 2012 16:58:55 -0700 Subject: Delete sdl-1.2.12 Change-Id: Ia96f80df04035ae84be3af468c945f2cec14f99c --- distrib/sdl-1.2.12/src/audio/dma/SDL_dmaaudio.c | 455 ------------------------ 1 file changed, 455 deletions(-) delete mode 100644 distrib/sdl-1.2.12/src/audio/dma/SDL_dmaaudio.c (limited to 'distrib/sdl-1.2.12/src/audio/dma/SDL_dmaaudio.c') diff --git a/distrib/sdl-1.2.12/src/audio/dma/SDL_dmaaudio.c b/distrib/sdl-1.2.12/src/audio/dma/SDL_dmaaudio.c deleted file mode 100644 index 84734a3..0000000 --- a/distrib/sdl-1.2.12/src/audio/dma/SDL_dmaaudio.c +++ /dev/null @@ -1,455 +0,0 @@ -/* - SDL - Simple DirectMedia Layer - Copyright (C) 1997-2006 Sam Lantinga - - This library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - This library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with this library; if not, write to the Free Software - Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - - Sam Lantinga - slouken@libsdl.org -*/ -#include "SDL_config.h" - -/* Allow access to a raw mixing buffer */ - -#include -#include /* For strerror() */ -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#if SDL_AUDIO_DRIVER_OSS_SOUNDCARD_H -/* This is installed on some systems */ -#include -#else -/* This is recommended by OSS */ -#include -#endif - -#ifndef MAP_FAILED -#define MAP_FAILED ((Uint8 *)-1) -#endif - -#include "SDL_timer.h" -#include "SDL_audio.h" -#include "../SDL_audio_c.h" -#include "../SDL_audiodev_c.h" -#include "SDL_dmaaudio.h" - -/* The tag name used by DMA audio */ -#define DMA_DRIVER_NAME "dma" - -/* Open the audio device for playback, and don't block if busy */ -#define OPEN_FLAGS (O_RDWR|O_NONBLOCK) - -/* Audio driver functions */ -static int DMA_OpenAudio(_THIS, SDL_AudioSpec *spec); -static void DMA_WaitAudio(_THIS); -static void DMA_PlayAudio(_THIS); -static Uint8 *DMA_GetAudioBuf(_THIS); -static void DMA_CloseAudio(_THIS); - -/* Audio driver bootstrap functions */ - -static int Audio_Available(void) -{ - int available; - int fd; - - available = 0; - - fd = SDL_OpenAudioPath(NULL, 0, OPEN_FLAGS, 0); - if ( fd >= 0 ) { - int caps; - struct audio_buf_info info; - - if ( (ioctl(fd, SNDCTL_DSP_GETCAPS, &caps) == 0) && - (caps & DSP_CAP_TRIGGER) && (caps & DSP_CAP_MMAP) && - (ioctl(fd, SNDCTL_DSP_GETOSPACE, &info) == 0) ) { - available = 1; - } - close(fd); - } - return(available); -} - -static void Audio_DeleteDevice(SDL_AudioDevice *device) -{ - SDL_free(device->hidden); - SDL_free(device); -} - -static SDL_AudioDevice *Audio_CreateDevice(int devindex) -{ - SDL_AudioDevice *this; - - /* Initialize all variables that we clean on shutdown */ - this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice)); - if ( this ) { - SDL_memset(this, 0, (sizeof *this)); - this->hidden = (struct SDL_PrivateAudioData *) - SDL_malloc((sizeof *this->hidden)); - } - if ( (this == NULL) || (this->hidden == NULL) ) { - SDL_OutOfMemory(); - if ( this ) { - SDL_free(this); - } - return(0); - } - SDL_memset(this->hidden, 0, (sizeof *this->hidden)); - audio_fd = -1; - - /* Set the function pointers */ - this->OpenAudio = DMA_OpenAudio; - this->WaitAudio = DMA_WaitAudio; - this->PlayAudio = DMA_PlayAudio; - this->GetAudioBuf = DMA_GetAudioBuf; - this->CloseAudio = DMA_CloseAudio; - - this->free = Audio_DeleteDevice; - - return this; -} - -AudioBootStrap DMA_bootstrap = { - DMA_DRIVER_NAME, "OSS /dev/dsp DMA audio", - Audio_Available, Audio_CreateDevice -}; - -/* This function waits until it is possible to write a full sound buffer */ -static void DMA_WaitAudio(_THIS) -{ - fd_set fdset; - - /* Check to see if the thread-parent process is still alive */ - { static int cnt = 0; - /* Note that this only works with thread implementations - that use a different process id for each thread. - */ - if (parent && (((++cnt)%10) == 0)) { /* Check every 10 loops */ - if ( kill(parent, 0) < 0 ) { - this->enabled = 0; - } - } - } - - /* See if we need to use timed audio synchronization */ - if ( frame_ticks ) { - /* Use timer for general audio synchronization */ - Sint32 ticks; - - ticks = ((Sint32)(next_frame - SDL_GetTicks()))-FUDGE_TICKS; - if ( ticks > 0 ) { - SDL_Delay(ticks); - } - } else { - /* Use select() for audio synchronization */ - struct timeval timeout; - FD_ZERO(&fdset); - FD_SET(audio_fd, &fdset); - timeout.tv_sec = 10; - timeout.tv_usec = 0; -#ifdef DEBUG_AUDIO - fprintf(stderr, "Waiting for audio to get ready\n"); -#endif - if ( select(audio_fd+1, NULL, &fdset, NULL, &timeout) <= 0 ) { - const char *message = -#ifdef AUDIO_OSPACE_HACK - "Audio timeout - buggy audio driver? (trying ospace)"; -#else - "Audio timeout - buggy audio driver? (disabled)"; -#endif - /* In general we should never print to the screen, - but in this case we have no other way of letting - the user know what happened. - */ - fprintf(stderr, "SDL: %s\n", message); -#ifdef AUDIO_OSPACE_HACK - /* We may be able to use GET_OSPACE trick */ - frame_ticks = (float)(this->spec->samples*1000) / - this->spec->freq; - next_frame = SDL_GetTicks()+frame_ticks; -#else - this->enabled = 0; - /* Don't try to close - may hang */ - audio_fd = -1; -#ifdef DEBUG_AUDIO - fprintf(stderr, "Done disabling audio\n"); -#endif -#endif /* AUDIO_OSPACE_HACK */ - } -#ifdef DEBUG_AUDIO - fprintf(stderr, "Ready!\n"); -#endif - } -} - -static void DMA_PlayAudio(_THIS) -{ - /* If timer synchronization is enabled, set the next write frame */ - if ( frame_ticks ) { - next_frame += frame_ticks; - } - return; -} - -static Uint8 *DMA_GetAudioBuf(_THIS) -{ - count_info info; - int playing; - int filling; - - /* Get number of blocks, looping if we're not using select() */ - do { - if ( ioctl(audio_fd, SNDCTL_DSP_GETOPTR, &info) < 0 ) { - /* Uh oh... */ - this->enabled = 0; - return(NULL); - } - } while ( frame_ticks && (info.blocks < 1) ); -#ifdef DEBUG_AUDIO - if ( info.blocks > 1 ) { - printf("Warning: audio underflow (%d frags)\n", info.blocks-1); - } -#endif - playing = info.ptr / this->spec.size; - filling = (playing + 1)%num_buffers; - return (dma_buf + (filling * this->spec.size)); -} - -static void DMA_CloseAudio(_THIS) -{ - if ( dma_buf != NULL ) { - munmap(dma_buf, dma_len); - dma_buf = NULL; - } - if ( audio_fd >= 0 ) { - close(audio_fd); - audio_fd = -1; - } -} - -static int DMA_ReopenAudio(_THIS, const char *audiodev, int format, int stereo, - SDL_AudioSpec *spec) -{ - int frag_spec; - int value; - - /* Close and then reopen the audio device */ - close(audio_fd); - audio_fd = open(audiodev, O_RDWR, 0); - if ( audio_fd < 0 ) { - SDL_SetError("Couldn't open %s: %s", audiodev, strerror(errno)); - return(-1); - } - - /* Calculate the final parameters for this audio specification */ - SDL_CalculateAudioSpec(spec); - - /* Determine the power of two of the fragment size */ - for ( frag_spec = 0; (0x01<size; ++frag_spec ); - if ( (0x01<size ) { - SDL_SetError("Fragment size must be a power of two"); - return(-1); - } - - /* Set the audio buffering parameters */ - if ( ioctl(audio_fd, SNDCTL_DSP_SETFRAGMENT, &frag_spec) < 0 ) { - SDL_SetError("Couldn't set audio fragment spec"); - return(-1); - } - - /* Set the audio format */ - value = format; - if ( (ioctl(audio_fd, SNDCTL_DSP_SETFMT, &value) < 0) || - (value != format) ) { - SDL_SetError("Couldn't set audio format"); - return(-1); - } - - /* Set mono or stereo audio */ - value = (spec->channels > 1); - if ( (ioctl(audio_fd, SNDCTL_DSP_STEREO, &stereo) < 0) || - (value != stereo) ) { - SDL_SetError("Couldn't set audio channels"); - return(-1); - } - - /* Set the DSP frequency */ - value = spec->freq; - if ( ioctl(audio_fd, SNDCTL_DSP_SPEED, &value) < 0 ) { - SDL_SetError("Couldn't set audio frequency"); - return(-1); - } - spec->freq = value; - - /* We successfully re-opened the audio */ - return(0); -} - -static int DMA_OpenAudio(_THIS, SDL_AudioSpec *spec) -{ - char audiodev[1024]; - int format; - int stereo; - int value; - Uint16 test_format; - struct audio_buf_info info; - - /* Reset the timer synchronization flag */ - frame_ticks = 0.0; - - /* Open the audio device */ - audio_fd = SDL_OpenAudioPath(audiodev, sizeof(audiodev), OPEN_FLAGS, 0); - if ( audio_fd < 0 ) { - SDL_SetError("Couldn't open %s: %s", audiodev, strerror(errno)); - return(-1); - } - dma_buf = NULL; - ioctl(audio_fd, SNDCTL_DSP_RESET, 0); - - /* Get a list of supported hardware formats */ - if ( ioctl(audio_fd, SNDCTL_DSP_GETFMTS, &value) < 0 ) { - SDL_SetError("Couldn't get audio format list"); - return(-1); - } - - /* Try for a closest match on audio format */ - format = 0; - for ( test_format = SDL_FirstAudioFormat(spec->format); - ! format && test_format; ) { -#ifdef DEBUG_AUDIO - fprintf(stderr, "Trying format 0x%4.4x\n", test_format); -#endif - switch ( test_format ) { - case AUDIO_U8: - if ( value & AFMT_U8 ) { - format = AFMT_U8; - } - break; - case AUDIO_S8: - if ( value & AFMT_S8 ) { - format = AFMT_S8; - } - break; - case AUDIO_S16LSB: - if ( value & AFMT_S16_LE ) { - format = AFMT_S16_LE; - } - break; - case AUDIO_S16MSB: - if ( value & AFMT_S16_BE ) { - format = AFMT_S16_BE; - } - break; - case AUDIO_U16LSB: - if ( value & AFMT_U16_LE ) { - format = AFMT_U16_LE; - } - break; - case AUDIO_U16MSB: - if ( value & AFMT_U16_BE ) { - format = AFMT_U16_BE; - } - break; - default: - format = 0; - break; - } - if ( ! format ) { - test_format = SDL_NextAudioFormat(); - } - } - if ( format == 0 ) { - SDL_SetError("Couldn't find any hardware audio formats"); - return(-1); - } - spec->format = test_format; - - /* Set the audio format */ - value = format; - if ( (ioctl(audio_fd, SNDCTL_DSP_SETFMT, &value) < 0) || - (value != format) ) { - SDL_SetError("Couldn't set audio format"); - return(-1); - } - - /* Set mono or stereo audio (currently only two channels supported) */ - stereo = (spec->channels > 1); - ioctl(audio_fd, SNDCTL_DSP_STEREO, &stereo); - if ( stereo ) { - spec->channels = 2; - } else { - spec->channels = 1; - } - - /* Because some drivers don't allow setting the buffer size - after setting the format, we must re-open the audio device - once we know what format and channels are supported - */ - if ( DMA_ReopenAudio(this, audiodev, format, stereo, spec) < 0 ) { - /* Error is set by DMA_ReopenAudio() */ - return(-1); - } - - /* Memory map the audio buffer */ - if ( ioctl(audio_fd, SNDCTL_DSP_GETOSPACE, &info) < 0 ) { - SDL_SetError("Couldn't get OSPACE parameters"); - return(-1); - } - spec->size = info.fragsize; - spec->samples = spec->size / ((spec->format & 0xFF) / 8); - spec->samples /= spec->channels; - num_buffers = info.fragstotal; - dma_len = num_buffers*spec->size; - dma_buf = (Uint8 *)mmap(NULL, dma_len, PROT_WRITE, MAP_SHARED, - audio_fd, 0); - if ( dma_buf == MAP_FAILED ) { - SDL_SetError("DMA memory map failed"); - dma_buf = NULL; - return(-1); - } - SDL_memset(dma_buf, spec->silence, dma_len); - - /* Check to see if we need to use select() workaround */ - { char *workaround; - workaround = SDL_getenv("SDL_DSP_NOSELECT"); - if ( workaround ) { - frame_ticks = (float)(spec->samples*1000)/spec->freq; - next_frame = SDL_GetTicks()+frame_ticks; - } - } - - /* Trigger audio playback */ - value = 0; - ioctl(audio_fd, SNDCTL_DSP_SETTRIGGER, &value); - value = PCM_ENABLE_OUTPUT; - if ( ioctl(audio_fd, SNDCTL_DSP_SETTRIGGER, &value) < 0 ) { - SDL_SetError("Couldn't trigger audio output"); - return(-1); - } - - /* Get the parent process id (we're the parent of the audio thread) */ - parent = getpid(); - - /* We're ready to rock and roll. :-) */ - return(0); -} -- cgit v1.1