static bool ffmpeg_init_audio(ffmpeg_t *handle)
{
settings_t *settings = config_get_ptr();
struct ff_config_param *params = &handle->config;
struct ff_audio_info *audio = &handle->audio;
struct ffemu_params *param = &handle->params;
AVCodec *codec = avcodec_find_encoder_by_name(
*params->acodec ? params->acodec : "flac");
if (!codec)
{
RARCH_ERR("[FFmpeg]: Cannot find acodec %s.\n",
*params->acodec ? params->acodec : "flac");
return false;
}
audio->encoder = codec;
audio->codec = avcodec_alloc_context3(codec);
audio->codec->codec_type = AVMEDIA_TYPE_AUDIO;
audio->codec->channels = param->channels;
audio->codec->channel_layout = (param->channels > 1)
? AV_CH_LAYOUT_STEREO : AV_CH_LAYOUT_MONO;
ffmpeg_audio_resolve_format(audio, codec);
ffmpeg_audio_resolve_sample_rate(handle, codec);
if (params->sample_rate)
{
audio->ratio = (double)params->sample_rate / param->samplerate;
audio->codec->sample_rate = params->sample_rate;
audio->codec->time_base = av_d2q(1.0 / params->sample_rate, 1000000);
rarch_resampler_realloc(&audio->resampler_data,
&audio->resampler,
settings->audio.resampler,
audio->ratio);
}
else
{
audio->codec->sample_fmt = AV_SAMPLE_FMT_S16;
audio->codec->sample_rate = (int)roundf(param->samplerate);
audio->codec->time_base = av_d2q(1.0 / param->samplerate, 1000000);
}
if (params->audio_qscale)
{
audio->codec->flags |= CODEC_FLAG_QSCALE;
audio->codec->global_quality = params->audio_global_quality;
}
else if (params->audio_bit_rate)
audio->codec->bit_rate = params->audio_bit_rate;
/* Allow experimental codecs. */
audio->codec->strict_std_compliance = FF_COMPLIANCE_EXPERIMENTAL;
if (handle->muxer.ctx->oformat->flags & AVFMT_GLOBALHEADER)
audio->codec->flags |= CODEC_FLAG_GLOBAL_HEADER;
if (avcodec_open2(audio->codec, codec, params->audio_opts ? ¶ms->audio_opts : NULL) != 0)
return false;
if (!audio->codec->frame_size) /* If not set (PCM), just set something. */
audio->codec->frame_size = 1024;
audio->buffer = (uint8_t*)av_malloc(
audio->codec->frame_size *
audio->codec->channels *
audio->sample_size);
#if 0
RARCH_LOG("[FFmpeg]: Audio frame size: %d.\n", audio->codec->frame_size);
#endif
if (!audio->buffer)
return false;
audio->outbuf_size = FF_MIN_BUFFER_SIZE;
audio->outbuf = (uint8_t*)av_malloc(audio->outbuf_size);
if (!audio->outbuf)
return false;
return true;
}
void init_audio(void)
{
audio_convert_init_simd();
// Resource leaks will follow if audio is initialized twice.
if (driver.audio_data)
return;
// Accomodate rewind since at some point we might have two full buffers.
size_t max_bufsamples = AUDIO_CHUNK_SIZE_NONBLOCKING * 2;
size_t outsamples_max = max_bufsamples * AUDIO_MAX_RATIO * g_settings.slowmotion_ratio;
// Used for recording even if audio isn't enabled.
rarch_assert(g_extern.audio_data.conv_outsamples = (int16_t*)malloc(outsamples_max * sizeof(int16_t)));
g_extern.audio_data.block_chunk_size = AUDIO_CHUNK_SIZE_BLOCKING;
g_extern.audio_data.nonblock_chunk_size = AUDIO_CHUNK_SIZE_NONBLOCKING;
g_extern.audio_data.chunk_size = g_extern.audio_data.block_chunk_size;
// Needs to be able to hold full content of a full max_bufsamples in addition to its own.
rarch_assert(g_extern.audio_data.rewind_buf = (int16_t*)malloc(max_bufsamples * sizeof(int16_t)));
g_extern.audio_data.rewind_size = max_bufsamples;
if (!g_settings.audio.enable)
{
g_extern.audio_active = false;
return;
}
find_audio_driver();
#ifdef HAVE_THREADS
if (g_extern.system.audio_callback.callback)
{
RARCH_LOG("Starting threaded audio driver ...\n");
if (!rarch_threaded_audio_init(&driver.audio, &driver.audio_data,
*g_settings.audio.device ? g_settings.audio.device : NULL,
g_settings.audio.out_rate, g_settings.audio.latency,
driver.audio))
{
RARCH_ERR("Cannot open threaded audio driver ... Exiting ...\n");
rarch_fail(1, "init_audio()");
}
}
else
#endif
{
driver.audio_data = driver.audio->init(*g_settings.audio.device ? g_settings.audio.device : NULL,
g_settings.audio.out_rate, g_settings.audio.latency);
}
if (!driver.audio_data)
{
RARCH_ERR("Failed to initialize audio driver. Will continue without audio.\n");
g_extern.audio_active = false;
}
g_extern.audio_data.use_float = false;
if (g_extern.audio_active && driver.audio->use_float && driver.audio->use_float(driver.audio_data))
g_extern.audio_data.use_float = true;
if (!g_settings.audio.sync && g_extern.audio_active)
{
driver.audio->set_nonblock_state(driver.audio_data, true);
g_extern.audio_data.chunk_size = g_extern.audio_data.nonblock_chunk_size;
}
// Should never happen.
if (g_extern.audio_data.in_rate <= 0.0f)
{
RARCH_WARN("Input rate is invalid (%.3f Hz). Using output rate (%u Hz).\n", g_extern.audio_data.in_rate, g_settings.audio.out_rate);
g_extern.audio_data.in_rate = g_settings.audio.out_rate;
}
g_extern.audio_data.orig_src_ratio =
g_extern.audio_data.src_ratio =
(double)g_settings.audio.out_rate / g_extern.audio_data.in_rate;
if (!rarch_resampler_realloc(&g_extern.audio_data.resampler_data, &g_extern.audio_data.resampler,
g_settings.audio.resampler, g_extern.audio_data.orig_src_ratio))
{
RARCH_ERR("Failed to initialize resampler \"%s\".\n", g_settings.audio.resampler);
g_extern.audio_active = false;
}
rarch_assert(g_extern.audio_data.data = (float*)malloc(max_bufsamples * sizeof(float)));
g_extern.audio_data.data_ptr = 0;
rarch_assert(g_settings.audio.out_rate < g_extern.audio_data.in_rate * AUDIO_MAX_RATIO);
rarch_assert(g_extern.audio_data.outsamples = (float*)malloc(outsamples_max * sizeof(float)));
g_extern.audio_data.rate_control = false;
if (!g_extern.system.audio_callback.callback && g_extern.audio_active && g_settings.audio.rate_control)
{
if (driver.audio->buffer_size && driver.audio->write_avail)
{
g_extern.audio_data.driver_buffer_size = driver.audio->buffer_size(driver.audio_data);
g_extern.audio_data.rate_control = true;
}
else
RARCH_WARN("Audio rate control was desired, but driver does not support needed features.\n");
}
rarch_main_command(RARCH_CMD_DSP_FILTER_DEINIT);
g_extern.measure_data.buffer_free_samples_count = 0;
if (g_extern.audio_active && !g_extern.audio_data.mute && g_extern.system.audio_callback.callback) // Threaded driver is initially stopped.
driver.audio->start(driver.audio_data);
}
