static int init(struct ao *ao)
{
if (SDL_WasInit(SDL_INIT_AUDIO)) {
mp_msg(MSGT_AO, MSGL_ERR, "[sdl] already initialized\n");
return -1;
}
struct priv *priv = ao->priv;
if (SDL_InitSubSystem(SDL_INIT_AUDIO)) {
if (!ao->probing)
mp_msg(MSGT_AO, MSGL_ERR, "[sdl] SDL_Init failed\n");
uninit(ao, true);
return -1;
}
struct mp_chmap_sel sel = {0};
mp_chmap_sel_add_waveext_def(&sel);
if (!ao_chmap_sel_adjust(ao, &sel, &ao->channels)) {
uninit(ao, true);
return -1;
}
SDL_AudioSpec desired, obtained;
switch (ao->format) {
case AF_FORMAT_U8: desired.format = AUDIO_U8; break;
case AF_FORMAT_S8: desired.format = AUDIO_S8; break;
case AF_FORMAT_U16_LE: desired.format = AUDIO_U16LSB; break;
case AF_FORMAT_U16_BE: desired.format = AUDIO_U16MSB; break;
default:
case AF_FORMAT_S16_LE: desired.format = AUDIO_S16LSB; break;
case AF_FORMAT_S16_BE: desired.format = AUDIO_S16MSB; break;
#ifdef AUDIO_S32LSB
case AF_FORMAT_S32_LE: desired.format = AUDIO_S32LSB; break;
#endif
#ifdef AUDIO_S32MSB
case AF_FORMAT_S32_BE: desired.format = AUDIO_S32MSB; break;
#endif
#ifdef AUDIO_F32LSB
case AF_FORMAT_FLOAT_LE: desired.format = AUDIO_F32LSB; break;
#endif
#ifdef AUDIO_F32MSB
case AF_FORMAT_FLOAT_BE: desired.format = AUDIO_F32MSB; break;
#endif
}
desired.freq = ao->samplerate;
desired.channels = ao->channels.num;
desired.samples = FFMIN(32768, ceil_power_of_two(ao->samplerate *
priv->buflen));
desired.callback = audio_callback;
desired.userdata = ao;
mp_msg(MSGT_AO, MSGL_V, "[sdl] requested format: %d Hz, %d channels, %x, "
"buffer size: %d samples\n",
(int) desired.freq, (int) desired.channels,
(int) desired.format, (int) desired.samples);
obtained = desired;
if (SDL_OpenAudio(&desired, &obtained)) {
if (!ao->probing)
mp_msg(MSGT_AO, MSGL_ERR, "[sdl] could not open audio: %s\n",
SDL_GetError());
uninit(ao, true);
return -1;
}
mp_msg(MSGT_AO, MSGL_V, "[sdl] obtained format: %d Hz, %d channels, %x, "
"buffer size: %d samples\n",
(int) obtained.freq, (int) obtained.channels,
(int) obtained.format, (int) obtained.samples);
switch (obtained.format) {
case AUDIO_U8: ao->format = AF_FORMAT_U8; break;
case AUDIO_S8: ao->format = AF_FORMAT_S8; break;
case AUDIO_S16LSB: ao->format = AF_FORMAT_S16_LE; break;
case AUDIO_S16MSB: ao->format = AF_FORMAT_S16_BE; break;
case AUDIO_U16LSB: ao->format = AF_FORMAT_U16_LE; break;
case AUDIO_U16MSB: ao->format = AF_FORMAT_U16_BE; break;
#ifdef AUDIO_S32LSB
case AUDIO_S32LSB: ao->format = AF_FORMAT_S32_LE; break;
#endif
#ifdef AUDIO_S32MSB
case AUDIO_S32MSB: ao->format = AF_FORMAT_S32_BE; break;
#endif
#ifdef AUDIO_F32LSB
case AUDIO_F32LSB: ao->format = AF_FORMAT_FLOAT_LE; break;
#endif
#ifdef AUDIO_F32MSB
case AUDIO_F32MSB: ao->format = AF_FORMAT_FLOAT_BE; break;
#endif
default:
if (!ao->probing)
mp_msg(MSGT_AO, MSGL_ERR,
"[sdl] could not find matching format\n");
uninit(ao, true);
return -1;
}
if (!ao_chmap_sel_get_def(ao, &sel, &ao->channels, obtained.channels)) {
uninit(ao, true);
return -1;
}
ao->samplerate = obtained.freq;
priv->buffer = av_fifo_alloc(obtained.size * priv->bufcnt);
priv->buffer_mutex = SDL_CreateMutex();
if (!priv->buffer_mutex) {
mp_msg(MSGT_AO, MSGL_ERR, "[sdl] SDL_CreateMutex failed\n");
uninit(ao, true);
return -1;
}
priv->underrun_cond = SDL_CreateCond();
if (!priv->underrun_cond) {
mp_msg(MSGT_AO, MSGL_ERR, "[sdl] SDL_CreateCond failed\n");
uninit(ao, true);
return -1;
}
priv->unpause = 1;
priv->paused = 1;
priv->callback_time0 = priv->callback_time1 = mp_time_us();
return 1;
}
static int init(struct ao *ao)
{
if (SDL_WasInit(SDL_INIT_AUDIO)) {
MP_ERR(ao, "already initialized\n");
return -1;
}
struct priv *priv = ao->priv;
if (SDL_InitSubSystem(SDL_INIT_AUDIO)) {
if (!ao->probing)
MP_ERR(ao, "SDL_Init failed\n");
uninit(ao);
return -1;
}
struct mp_chmap_sel sel = {0};
mp_chmap_sel_add_waveext_def(&sel);
if (!ao_chmap_sel_adjust(ao, &sel, &ao->channels)) {
uninit(ao);
return -1;
}
ao->format = af_fmt_from_planar(ao->format);
SDL_AudioSpec desired, obtained;
desired.format = AUDIO_S16SYS;
for (int n = 0; fmtmap[n][0]; n++) {
if (ao->format == fmtmap[n][0]) {
desired.format = fmtmap[n][1];
break;
}
}
desired.freq = ao->samplerate;
desired.channels = ao->channels.num;
desired.samples = MPMIN(32768, ceil_power_of_two(ao->samplerate *
priv->buflen));
desired.callback = audio_callback;
desired.userdata = ao;
MP_VERBOSE(ao, "requested format: %d Hz, %d channels, %x, "
"buffer size: %d samples\n",
(int) desired.freq, (int) desired.channels,
(int) desired.format, (int) desired.samples);
obtained = desired;
if (SDL_OpenAudio(&desired, &obtained)) {
if (!ao->probing)
MP_ERR(ao, "could not open audio: %s\n", SDL_GetError());
uninit(ao);
return -1;
}
MP_VERBOSE(ao, "obtained format: %d Hz, %d channels, %x, "
"buffer size: %d samples\n",
(int) obtained.freq, (int) obtained.channels,
(int) obtained.format, (int) obtained.samples);
// The sample count is usually the number of samples the callback requests,
// which we assume is the period size. Normally, ao.c will allocate a large
// enough buffer. But in case the period size should be pathologically
// large, this will help.
ao->device_buffer = 3 * obtained.samples;
ao->format = 0;
for (int n = 0; fmtmap[n][0]; n++) {
if (obtained.format == fmtmap[n][1]) {
ao->format = fmtmap[n][0];
break;
}
}
if (!ao->format) {
if (!ao->probing)
MP_ERR(ao, "could not find matching format\n");
uninit(ao);
return -1;
}
if (!ao_chmap_sel_get_def(ao, &sel, &ao->channels, obtained.channels)) {
uninit(ao);
return -1;
}
ao->samplerate = obtained.freq;
priv->paused = 1;
return 1;
}
