diff options
Diffstat (limited to 'audio/sdlaudio.c')
-rw-r--r-- | audio/sdlaudio.c | 327 |
1 files changed, 217 insertions, 110 deletions
diff --git a/audio/sdlaudio.c b/audio/sdlaudio.c index 978686a..673e2a1 100644 --- a/audio/sdlaudio.c +++ b/audio/sdlaudio.c @@ -1,8 +1,8 @@ /* - * QEMU SDL audio output driver - * - * Copyright (c) 2004 Vassili Karpov (malc) - * + * 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 @@ -25,22 +25,15 @@ #include <SDL_thread.h> #include "vl.h" -#include "audio/audio_int.h" - -typedef struct SDLVoice { - HWVoice hw; -} SDLVoice; - -#define dolog(...) AUD_log ("sdl", __VA_ARGS__) -#ifdef DEBUG -#define ldebug(...) dolog (__VA_ARGS__) -#else -#define ldebug(...) -#endif +#define AUDIO_CAP "sdl" +#include "audio_int.h" -#define QC_SDL_SAMPLES "QEMU_SDL_SAMPLES" - -#define errstr() SDL_GetError () +typedef struct SDLVoiceOut { + HWVoiceOut hw; + int live; + int rpos; + int decr; +} SDLVoiceOut; static struct { int nb_samples; @@ -56,91 +49,129 @@ struct SDLAudioState { } glob_sdl; typedef struct SDLAudioState SDLAudioState; -static void sdl_hw_run (HWVoice *hw) +static void GCC_FMT_ATTR (1, 2) sdl_logerr (const char *fmt, ...) { - (void) hw; + 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) +static int sdl_lock (SDLAudioState *s, const char *forfn) { if (SDL_LockMutex (s->mutex)) { - dolog ("SDL_LockMutex failed\nReason: %s\n", errstr ()); + sdl_logerr ("SDL_LockMutex for %s failed\n", forfn); return -1; } return 0; } -static int sdl_unlock (SDLAudioState *s) +static int sdl_unlock (SDLAudioState *s, const char *forfn) { if (SDL_UnlockMutex (s->mutex)) { - dolog ("SDL_UnlockMutex failed\nReason: %s\n", errstr ()); + sdl_logerr ("SDL_UnlockMutex for %s failed\n", forfn); return -1; } return 0; } -static int sdl_post (SDLAudioState *s) +static int sdl_post (SDLAudioState *s, const char *forfn) { if (SDL_SemPost (s->sem)) { - dolog ("SDL_SemPost failed\nReason: %s\n", errstr ()); + sdl_logerr ("SDL_SemPost for %s failed\n", forfn); return -1; } return 0; } -static int sdl_wait (SDLAudioState *s) +static int sdl_wait (SDLAudioState *s, const char *forfn) { if (SDL_SemWait (s->sem)) { - dolog ("SDL_SemWait failed\nReason: %s\n", errstr ()); + sdl_logerr ("SDL_SemWait for %s failed\n", forfn); return -1; } return 0; } -static int sdl_unlock_and_post (SDLAudioState *s) +static int sdl_unlock_and_post (SDLAudioState *s, const char *forfn) { - if (sdl_unlock (s)) + if (sdl_unlock (s, forfn)) { return -1; + } - return sdl_post (s); -} - -static int sdl_hw_write (SWVoice *sw, void *buf, int len) -{ - int ret; - SDLAudioState *s = &glob_sdl; - sdl_lock (s); - ret = pcm_hw_write (sw, buf, len); - sdl_unlock_and_post (s); - return ret; + return sdl_post (s, forfn); } -static int AUD_to_sdlfmt (audfmt_e fmt, int *shift) +static int aud_to_sdlfmt (audfmt_e fmt, int *shift) { - *shift = 0; switch (fmt) { - case AUD_FMT_S8: return AUDIO_S8; - case AUD_FMT_U8: return AUDIO_U8; - case AUD_FMT_S16: *shift = 1; return AUDIO_S16LSB; - case AUD_FMT_U16: *shift = 1; return AUDIO_U16LSB; + case AUD_FMT_S8: + *shift = 0; + return AUDIO_S8; + + case AUD_FMT_U8: + *shift = 0; + return AUDIO_U8; + + case AUD_FMT_S16: + *shift = 1; + return AUDIO_S16LSB; + + case AUD_FMT_U16: + *shift = 1; + return AUDIO_U16LSB; + default: - dolog ("Internal logic error: Bad audio format %d\nAborting\n", fmt); - exit (EXIT_FAILURE); + dolog ("Internal logic error: Bad audio format %d\n", fmt); +#ifdef DEBUG_AUDIO + abort (); +#endif + return AUDIO_U8; } } -static int sdl_to_audfmt (int fmt) +static int sdl_to_audfmt (int sdlfmt, audfmt_e *fmt, int *endianess) { - switch (fmt) { - case AUDIO_S8: return AUD_FMT_S8; - case AUDIO_U8: return AUD_FMT_U8; - case AUDIO_S16LSB: return AUD_FMT_S16; - case AUDIO_U16LSB: return AUD_FMT_U16; + switch (sdlfmt) { + case AUDIO_S8: + *endianess = 0; + *fmt = AUD_FMT_S8; + break; + + case AUDIO_U8: + *endianess = 0; + *fmt = AUD_FMT_U8; + break; + + case AUDIO_S16LSB: + *endianess = 0; + *fmt = AUD_FMT_S16; + break; + + case AUDIO_U16LSB: + *endianess = 0; + *fmt = AUD_FMT_U16; + break; + + case AUDIO_S16MSB: + *endianess = 1; + *fmt = AUD_FMT_S16; + break; + + case AUDIO_U16MSB: + *endianess = 1; + *fmt = AUD_FMT_U16; + break; + default: - dolog ("Internal logic error: Unrecognized SDL audio format %d\n" - "Aborting\n", fmt); - exit (EXIT_FAILURE); + dolog ("Unrecognized SDL audio format %d\n", sdlfmt); + return -1; } + + return 0; } static int sdl_open (SDL_AudioSpec *req, SDL_AudioSpec *obt) @@ -149,7 +180,7 @@ static int sdl_open (SDL_AudioSpec *req, SDL_AudioSpec *obt) status = SDL_OpenAudio (req, obt); if (status) { - dolog ("SDL_OpenAudio failed\nReason: %s\n", errstr ()); + sdl_logerr ("SDL_OpenAudio failed\n"); } return status; } @@ -157,9 +188,9 @@ static int sdl_open (SDL_AudioSpec *req, SDL_AudioSpec *obt) static void sdl_close (SDLAudioState *s) { if (s->initialized) { - sdl_lock (s); + sdl_lock (s, "sdl_close"); s->exit = 1; - sdl_unlock_and_post (s); + sdl_unlock_and_post (s, "sdl_close"); SDL_PauseAudio (1); SDL_CloseAudio (); s->initialized = 0; @@ -168,31 +199,40 @@ static void sdl_close (SDLAudioState *s) static void sdl_callback (void *opaque, Uint8 *buf, int len) { - SDLVoice *sdl = opaque; + SDLVoiceOut *sdl = opaque; SDLAudioState *s = &glob_sdl; - HWVoice *hw = &sdl->hw; - int samples = len >> hw->shift; + HWVoiceOut *hw = &sdl->hw; + int samples = len >> hw->info.shift; if (s->exit) { return; } while (samples) { - int to_mix, live, decr; + int to_mix, decr; /* dolog ("in callback samples=%d\n", samples); */ - sdl_wait (s); + sdl_wait (s, "sdl_callback"); if (s->exit) { return; } - sdl_lock (s); - live = pcm_hw_get_live (hw); - if (live <= 0) + 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, live); + to_mix = audio_MIN (samples, sdl->live); decr = to_mix; while (to_mix) { int chunk = audio_MIN (to_mix, hw->samples - hw->rpos); @@ -200,44 +240,86 @@ static void sdl_callback (void *opaque, Uint8 *buf, int len) /* dolog ("in callback to_mix %d, chunk %d\n", to_mix, chunk); */ hw->clip (buf, src, chunk); - memset (src, 0, chunk * sizeof (st_sample_t)); - hw->rpos = (hw->rpos + chunk) % hw->samples; + mixeng_clear (src, chunk); + sdl->rpos = (sdl->rpos + chunk) % hw->samples; to_mix -= chunk; - buf += chunk << hw->shift; + buf += chunk << hw->info.shift; } samples -= decr; - pcm_hw_dec_live (hw, decr); + sdl->live -= decr; + sdl->decr += decr; again: - sdl_unlock (s); + if (sdl_unlock (s, "sdl_callback")) { + return; + } } /* dolog ("done len=%d\n", len); */ } -static void sdl_hw_fini (HWVoice *hw) +static int sdl_write_out (SWVoiceOut *sw, void *buf, int len) { - ldebug ("sdl_hw_fini %d fixed=%d\n", - glob_sdl.initialized, audio_state.fixed_format); + return audio_pcm_sw_write (sw, buf, len); +} + +static int sdl_run_out (HWVoiceOut *hw) +{ + int decr, live; + SDLVoiceOut *sdl = (SDLVoiceOut *) hw; + SDLAudioState *s = &glob_sdl; + + if (sdl_lock (s, "sdl_callback")) { + return 0; + } + + live = audio_pcm_hw_get_live_out (hw); + + 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_callback"); + } + else { + sdl_unlock (s, "sdl_callback"); + } + return decr; +} + +static void sdl_fini_out (HWVoiceOut *hw) +{ + (void) hw; + sdl_close (&glob_sdl); } -static int sdl_hw_init (HWVoice *hw, int freq, int nchannels, audfmt_e fmt) +static int sdl_init_out (HWVoiceOut *hw, int freq, int nchannels, audfmt_e fmt) { - SDLVoice *sdl = (SDLVoice *) hw; + SDLVoiceOut *sdl = (SDLVoiceOut *) hw; SDLAudioState *s = &glob_sdl; SDL_AudioSpec req, obt; int shift; - - ldebug ("sdl_hw_init %d freq=%d fixed=%d\n", - s->initialized, freq, audio_state.fixed_format); + int endianess; + int err; + audfmt_e effective_fmt; if (nchannels != 2) { - dolog ("Bogus channel count %d\n", nchannels); + dolog ("Can not init DAC. Bogus channel count %d\n", nchannels); return -1; } req.freq = freq; - req.format = AUD_to_sdlfmt (fmt, &shift); + req.format = aud_to_sdlfmt (fmt, &shift); req.channels = nchannels; req.samples = conf.nb_samples; shift <<= nchannels == 2; @@ -245,12 +327,23 @@ static int sdl_hw_init (HWVoice *hw, int freq, int nchannels, audfmt_e fmt) req.callback = sdl_callback; req.userdata = sdl; - if (sdl_open (&req, &obt)) + if (sdl_open (&req, &obt)) { + return -1; + } + + err = sdl_to_audfmt (obt.format, &effective_fmt, &endianess); + if (err) { + sdl_close (s); return -1; + } - hw->freq = obt.freq; - hw->fmt = sdl_to_audfmt (obt.format); - hw->nchannels = obt.channels; + audio_pcm_init_info ( + &hw->info, + obt.freq, + obt.channels, + effective_fmt, + audio_need_to_swap_endian (endianess) + ); hw->bufsize = obt.samples << shift; s->initialized = 1; @@ -259,7 +352,7 @@ static int sdl_hw_init (HWVoice *hw, int freq, int nchannels, audfmt_e fmt) return 0; } -static int sdl_hw_ctl (HWVoice *hw, int cmd, ...) +static int sdl_ctl_out (HWVoiceOut *hw, int cmd, ...) { (void) hw; @@ -278,24 +371,22 @@ static int sdl_hw_ctl (HWVoice *hw, int cmd, ...) static void *sdl_audio_init (void) { SDLAudioState *s = &glob_sdl; - conf.nb_samples = audio_get_conf_int (QC_SDL_SAMPLES, conf.nb_samples); if (SDL_InitSubSystem (SDL_INIT_AUDIO)) { - dolog ("SDL failed to initialize audio subsystem\nReason: %s\n", - errstr ()); + sdl_logerr ("SDL failed to initialize audio subsystem\n"); return NULL; } s->mutex = SDL_CreateMutex (); if (!s->mutex) { - dolog ("Failed to create SDL mutex\nReason: %s\n", errstr ()); + sdl_logerr ("Failed to create SDL mutex\n"); SDL_QuitSubSystem (SDL_INIT_AUDIO); return NULL; } s->sem = SDL_CreateSemaphore (0); if (!s->sem) { - dolog ("Failed to create SDL semaphore\nReason: %s\n", errstr ()); + sdl_logerr ("Failed to create SDL semaphore\n"); SDL_DestroyMutex (s->mutex); SDL_QuitSubSystem (SDL_INIT_AUDIO); return NULL; @@ -313,20 +404,36 @@ static void sdl_audio_fini (void *opaque) SDL_QuitSubSystem (SDL_INIT_AUDIO); } -struct pcm_ops sdl_pcm_ops = { - sdl_hw_init, - sdl_hw_fini, - sdl_hw_run, - sdl_hw_write, - sdl_hw_ctl +static struct audio_option sdl_options[] = { + {"SAMPLES", AUD_OPT_INT, &conf.nb_samples, + "Size of SDL buffer in samples", NULL, 0}, + {NULL, 0, NULL, NULL, NULL, 0} +}; + +static struct audio_pcm_ops sdl_pcm_ops = { + sdl_init_out, + sdl_fini_out, + sdl_run_out, + sdl_write_out, + sdl_ctl_out, + + NULL, + NULL, + NULL, + NULL, + NULL }; -struct audio_output_driver sdl_output_driver = { - "sdl", - sdl_audio_init, - sdl_audio_fini, - &sdl_pcm_ops, - 1, - 1, - sizeof (SDLVoice) +struct audio_driver sdl_audio_driver = { + INIT_FIELD (name = ) "sdl", + INIT_FIELD (descr = ) "SDL http://www.libsdl.org", + INIT_FIELD (options = ) sdl_options, + INIT_FIELD (init = ) sdl_audio_init, + INIT_FIELD (fini = ) sdl_audio_fini, + INIT_FIELD (pcm_ops = ) &sdl_pcm_ops, + INIT_FIELD (can_be_default = ) 1, + INIT_FIELD (max_voices_out = ) 1, + INIT_FIELD (max_voices_in = ) 0, + INIT_FIELD (voice_size_out = ) sizeof (SDLVoiceOut), + INIT_FIELD (voice_size_in = ) 0 }; |