diff options
Diffstat (limited to 'qemu/audio/sdlaudio.c')
| -rw-r--r-- | qemu/audio/sdlaudio.c | 467 |
1 files changed, 0 insertions, 467 deletions
diff --git a/qemu/audio/sdlaudio.c b/qemu/audio/sdlaudio.c deleted file mode 100644 index db69fe141..000000000 --- a/qemu/audio/sdlaudio.c +++ /dev/null @@ -1,467 +0,0 @@ -/* - * QEMU SDL audio driver - * - * Copyright (c) 2004-2005 Vassili Karpov (malc) - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - */ -#include "qemu/osdep.h" -#include <SDL.h> -#include <SDL_thread.h> -#include "qemu-common.h" -#include "audio.h" - -#ifndef _WIN32 -#ifdef __sun__ -#define _POSIX_PTHREAD_SEMANTICS 1 -#elif defined(__OpenBSD__) || defined(__FreeBSD__) || defined(__DragonFly__) -#include <pthread.h> -#endif -#endif - -#define AUDIO_CAP "sdl" -#include "audio_int.h" - -typedef struct SDLVoiceOut { - HWVoiceOut hw; - int live; - int rpos; - int decr; -} SDLVoiceOut; - -static struct { - int nb_samples; -} conf = { - .nb_samples = 1024 -}; - -static struct SDLAudioState { - int exit; - SDL_mutex *mutex; - SDL_sem *sem; - int initialized; - bool driver_created; -} glob_sdl; -typedef struct SDLAudioState SDLAudioState; - -static void GCC_FMT_ATTR (1, 2) sdl_logerr (const char *fmt, ...) -{ - va_list ap; - - va_start (ap, fmt); - AUD_vlog (AUDIO_CAP, fmt, ap); - va_end (ap); - - AUD_log (AUDIO_CAP, "Reason: %s\n", SDL_GetError ()); -} - -static int sdl_lock (SDLAudioState *s, const char *forfn) -{ - if (SDL_LockMutex (s->mutex)) { - sdl_logerr ("SDL_LockMutex for %s failed\n", forfn); - return -1; - } - return 0; -} - -static int sdl_unlock (SDLAudioState *s, const char *forfn) -{ - if (SDL_UnlockMutex (s->mutex)) { - sdl_logerr ("SDL_UnlockMutex for %s failed\n", forfn); - return -1; - } - return 0; -} - -static int sdl_post (SDLAudioState *s, const char *forfn) -{ - if (SDL_SemPost (s->sem)) { - sdl_logerr ("SDL_SemPost for %s failed\n", forfn); - return -1; - } - return 0; -} - -static int sdl_wait (SDLAudioState *s, const char *forfn) -{ - if (SDL_SemWait (s->sem)) { - sdl_logerr ("SDL_SemWait for %s failed\n", forfn); - return -1; - } - return 0; -} - -static int sdl_unlock_and_post (SDLAudioState *s, const char *forfn) -{ - if (sdl_unlock (s, forfn)) { - return -1; - } - - return sdl_post (s, forfn); -} - -static int aud_to_sdlfmt (audfmt_e fmt) -{ - switch (fmt) { - case AUD_FMT_S8: - return AUDIO_S8; - - case AUD_FMT_U8: - return AUDIO_U8; - - case AUD_FMT_S16: - return AUDIO_S16LSB; - - case AUD_FMT_U16: - return AUDIO_U16LSB; - - default: - dolog ("Internal logic error: Bad audio format %d\n", fmt); -#ifdef DEBUG_AUDIO - abort (); -#endif - return AUDIO_U8; - } -} - -static int sdl_to_audfmt(int sdlfmt, audfmt_e *fmt, int *endianness) -{ - switch (sdlfmt) { - case AUDIO_S8: - *endianness = 0; - *fmt = AUD_FMT_S8; - break; - - case AUDIO_U8: - *endianness = 0; - *fmt = AUD_FMT_U8; - break; - - case AUDIO_S16LSB: - *endianness = 0; - *fmt = AUD_FMT_S16; - break; - - case AUDIO_U16LSB: - *endianness = 0; - *fmt = AUD_FMT_U16; - break; - - case AUDIO_S16MSB: - *endianness = 1; - *fmt = AUD_FMT_S16; - break; - - case AUDIO_U16MSB: - *endianness = 1; - *fmt = AUD_FMT_U16; - break; - - default: - dolog ("Unrecognized SDL audio format %d\n", sdlfmt); - return -1; - } - - return 0; -} - -static int sdl_open (SDL_AudioSpec *req, SDL_AudioSpec *obt) -{ - int status; -#ifndef _WIN32 - int err; - sigset_t new, old; - - /* Make sure potential threads created by SDL don't hog signals. */ - err = sigfillset (&new); - if (err) { - dolog ("sdl_open: sigfillset failed: %s\n", strerror (errno)); - return -1; - } - err = pthread_sigmask (SIG_BLOCK, &new, &old); - if (err) { - dolog ("sdl_open: pthread_sigmask failed: %s\n", strerror (err)); - return -1; - } -#endif - - status = SDL_OpenAudio (req, obt); - if (status) { - sdl_logerr ("SDL_OpenAudio failed\n"); - } - -#ifndef _WIN32 - err = pthread_sigmask (SIG_SETMASK, &old, NULL); - if (err) { - dolog ("sdl_open: pthread_sigmask (restore) failed: %s\n", - strerror (errno)); - /* We have failed to restore original signal mask, all bets are off, - so exit the process */ - exit (EXIT_FAILURE); - } -#endif - return status; -} - -static void sdl_close (SDLAudioState *s) -{ - if (s->initialized) { - sdl_lock (s, "sdl_close"); - s->exit = 1; - sdl_unlock_and_post (s, "sdl_close"); - SDL_PauseAudio (1); - SDL_CloseAudio (); - s->initialized = 0; - } -} - -static void sdl_callback (void *opaque, Uint8 *buf, int len) -{ - SDLVoiceOut *sdl = opaque; - SDLAudioState *s = &glob_sdl; - HWVoiceOut *hw = &sdl->hw; - int samples = len >> hw->info.shift; - - if (s->exit) { - return; - } - - while (samples) { - int to_mix, decr; - - /* dolog ("in callback samples=%d\n", samples); */ - sdl_wait (s, "sdl_callback"); - if (s->exit) { - return; - } - - if (sdl_lock (s, "sdl_callback")) { - return; - } - - if (audio_bug (AUDIO_FUNC, sdl->live < 0 || sdl->live > hw->samples)) { - dolog ("sdl->live=%d hw->samples=%d\n", - sdl->live, hw->samples); - return; - } - - if (!sdl->live) { - goto again; - } - - /* dolog ("in callback live=%d\n", live); */ - to_mix = audio_MIN (samples, sdl->live); - decr = to_mix; - while (to_mix) { - int chunk = audio_MIN (to_mix, hw->samples - hw->rpos); - struct st_sample *src = hw->mix_buf + hw->rpos; - - /* dolog ("in callback to_mix %d, chunk %d\n", to_mix, chunk); */ - hw->clip (buf, src, chunk); - sdl->rpos = (sdl->rpos + chunk) % hw->samples; - to_mix -= chunk; - buf += chunk << hw->info.shift; - } - samples -= decr; - sdl->live -= decr; - sdl->decr += decr; - - again: - if (sdl_unlock (s, "sdl_callback")) { - return; - } - } - /* dolog ("done len=%d\n", len); */ -} - -static int sdl_write_out (SWVoiceOut *sw, void *buf, int len) -{ - return audio_pcm_sw_write (sw, buf, len); -} - -static int sdl_run_out (HWVoiceOut *hw, int live) -{ - int decr; - SDLVoiceOut *sdl = (SDLVoiceOut *) hw; - SDLAudioState *s = &glob_sdl; - - if (sdl_lock (s, "sdl_run_out")) { - return 0; - } - - if (sdl->decr > live) { - ldebug ("sdl->decr %d live %d sdl->live %d\n", - sdl->decr, - live, - sdl->live); - } - - decr = audio_MIN (sdl->decr, live); - sdl->decr -= decr; - - sdl->live = live - decr; - hw->rpos = sdl->rpos; - - if (sdl->live > 0) { - sdl_unlock_and_post (s, "sdl_run_out"); - } - else { - sdl_unlock (s, "sdl_run_out"); - } - return decr; -} - -static void sdl_fini_out (HWVoiceOut *hw) -{ - (void) hw; - - sdl_close (&glob_sdl); -} - -static int sdl_init_out(HWVoiceOut *hw, struct audsettings *as, - void *drv_opaque) -{ - SDLVoiceOut *sdl = (SDLVoiceOut *) hw; - SDLAudioState *s = &glob_sdl; - SDL_AudioSpec req, obt; - int endianness; - int err; - audfmt_e effective_fmt; - struct audsettings obt_as; - - req.freq = as->freq; - req.format = aud_to_sdlfmt (as->fmt); - req.channels = as->nchannels; - req.samples = conf.nb_samples; - req.callback = sdl_callback; - req.userdata = sdl; - - if (sdl_open (&req, &obt)) { - return -1; - } - - err = sdl_to_audfmt(obt.format, &effective_fmt, &endianness); - if (err) { - sdl_close (s); - return -1; - } - - obt_as.freq = obt.freq; - obt_as.nchannels = obt.channels; - obt_as.fmt = effective_fmt; - obt_as.endianness = endianness; - - audio_pcm_init_info (&hw->info, &obt_as); - hw->samples = obt.samples; - - s->initialized = 1; - s->exit = 0; - SDL_PauseAudio (0); - return 0; -} - -static int sdl_ctl_out (HWVoiceOut *hw, int cmd, ...) -{ - (void) hw; - - switch (cmd) { - case VOICE_ENABLE: - SDL_PauseAudio (0); - break; - - case VOICE_DISABLE: - SDL_PauseAudio (1); - break; - } - return 0; -} - -static void *sdl_audio_init (void) -{ - SDLAudioState *s = &glob_sdl; - if (s->driver_created) { - sdl_logerr("Can't create multiple sdl backends\n"); - return NULL; - } - - if (SDL_InitSubSystem (SDL_INIT_AUDIO)) { - sdl_logerr ("SDL failed to initialize audio subsystem\n"); - return NULL; - } - - s->mutex = SDL_CreateMutex (); - if (!s->mutex) { - sdl_logerr ("Failed to create SDL mutex\n"); - SDL_QuitSubSystem (SDL_INIT_AUDIO); - return NULL; - } - - s->sem = SDL_CreateSemaphore (0); - if (!s->sem) { - sdl_logerr ("Failed to create SDL semaphore\n"); - SDL_DestroyMutex (s->mutex); - SDL_QuitSubSystem (SDL_INIT_AUDIO); - return NULL; - } - - s->driver_created = true; - return s; -} - -static void sdl_audio_fini (void *opaque) -{ - SDLAudioState *s = opaque; - sdl_close (s); - SDL_DestroySemaphore (s->sem); - SDL_DestroyMutex (s->mutex); - SDL_QuitSubSystem (SDL_INIT_AUDIO); - s->driver_created = false; -} - -static struct audio_option sdl_options[] = { - { - .name = "SAMPLES", - .tag = AUD_OPT_INT, - .valp = &conf.nb_samples, - .descr = "Size of SDL buffer in samples" - }, - { /* End of list */ } -}; - -static struct audio_pcm_ops sdl_pcm_ops = { - .init_out = sdl_init_out, - .fini_out = sdl_fini_out, - .run_out = sdl_run_out, - .write = sdl_write_out, - .ctl_out = sdl_ctl_out, -}; - -struct audio_driver sdl_audio_driver = { - .name = "sdl", - .descr = "SDL http://www.libsdl.org", - .options = sdl_options, - .init = sdl_audio_init, - .fini = sdl_audio_fini, - .pcm_ops = &sdl_pcm_ops, - .can_be_default = 1, - .max_voices_out = 1, - .max_voices_in = 0, - .voice_size_out = sizeof (SDLVoiceOut), - .voice_size_in = 0 -}; |