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ffplay: put audio_open into a seperate function

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Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Marton Balint 2012-04-14 16:19:15 +02:00
parent 1bf22c3a8f
commit 03095d73a3
1 changed files with 58 additions and 52 deletions
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110
ffplay.c
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@ -2241,18 +2241,69 @@ static void sdl_audio_callback(void *opaque, Uint8 *stream, int len)
is->audio_current_pts_drift = is->audio_current_pts - audio_callback_time / 1000000.0;
}
static int audio_open(VideoState *is, int64_t channel_layout, int channels, int sample_rate)
{
SDL_AudioSpec wanted_spec, spec;
const char *env;
int64_t wanted_channel_layout = 0;
int wanted_nb_channels;
env = SDL_getenv("SDL_AUDIO_CHANNELS");
if (env)
wanted_channel_layout = av_get_default_channel_layout(SDL_atoi(env));
if (!wanted_channel_layout) {
wanted_channel_layout = (channel_layout && channels == av_get_channel_layout_nb_channels(channel_layout)) ? channel_layout : av_get_default_channel_layout(channels);
wanted_channel_layout &= ~AV_CH_LAYOUT_STEREO_DOWNMIX;
wanted_nb_channels = av_get_channel_layout_nb_channels(wanted_channel_layout);
/* SDL only supports 1, 2, 4 or 6 channels at the moment, so we have to make sure not to request anything else. */
while (wanted_nb_channels > 0 && (wanted_nb_channels == 3 || wanted_nb_channels == 5 || wanted_nb_channels > (SDL_VERSION_ATLEAST(1, 2, 8) ? 6 : 2))) {
wanted_nb_channels--;
wanted_channel_layout = av_get_default_channel_layout(wanted_nb_channels);
}
}
wanted_spec.channels = av_get_channel_layout_nb_channels(wanted_channel_layout);
wanted_spec.freq = sample_rate;
if (wanted_spec.freq <= 0 || wanted_spec.channels <= 0) {
fprintf(stderr, "Invalid sample rate or channel count!\n");
return -1;
}
wanted_spec.format = AUDIO_S16SYS;
wanted_spec.silence = 0;
wanted_spec.samples = SDL_AUDIO_BUFFER_SIZE;
wanted_spec.callback = sdl_audio_callback;
wanted_spec.userdata = is;
if (SDL_OpenAudio(&wanted_spec, &spec) < 0) {
fprintf(stderr, "SDL_OpenAudio: %s\n", SDL_GetError());
return -1;
}
if (spec.format != AUDIO_S16SYS) {
fprintf(stderr, "SDL advised audio format %d is not supported!\n", spec.format);
return -1;
}
if (spec.channels != wanted_spec.channels) {
wanted_channel_layout = av_get_default_channel_layout(spec.channels);
if (!wanted_channel_layout) {
fprintf(stderr, "SDL advised channel count %d is not supported!\n", spec.channels);
return -1;
}
}
is->audio_hw_buf_size = spec.size;
is->audio_src_fmt = is->audio_tgt_fmt = AV_SAMPLE_FMT_S16;
is->audio_src_freq = is->audio_tgt_freq = spec.freq;
is->audio_src_channel_layout = is->audio_tgt_channel_layout = wanted_channel_layout;
is->audio_src_channels = is->audio_tgt_channels = spec.channels;
return 0;
}
/* open a given stream. Return 0 if OK */
static int stream_component_open(VideoState *is, int stream_index)
{
AVFormatContext *ic = is->ic;
AVCodecContext *avctx;
AVCodec *codec;
SDL_AudioSpec wanted_spec, spec;
AVDictionary *opts;
AVDictionaryEntry *t = NULL;
int64_t wanted_channel_layout = 0;
int wanted_nb_channels;
const char *env;
if (stream_index < 0 || stream_index >= ic->nb_streams)
return -1;
@ -2287,29 +2338,6 @@ static int stream_component_open(VideoState *is, int stream_index)
if(codec->capabilities & CODEC_CAP_DR1)
avctx->flags |= CODEC_FLAG_EMU_EDGE;
if (avctx->codec_type == AVMEDIA_TYPE_AUDIO) {
memset(&is->audio_pkt_temp, 0, sizeof(is->audio_pkt_temp));
env = SDL_getenv("SDL_AUDIO_CHANNELS");
if (env)
wanted_channel_layout = av_get_default_channel_layout(SDL_atoi(env));
if (!wanted_channel_layout) {
wanted_channel_layout = (avctx->channel_layout && avctx->channels == av_get_channel_layout_nb_channels(avctx->channel_layout)) ? avctx->channel_layout : av_get_default_channel_layout(avctx->channels);
wanted_channel_layout &= ~AV_CH_LAYOUT_STEREO_DOWNMIX;
wanted_nb_channels = av_get_channel_layout_nb_channels(wanted_channel_layout);
/* SDL only supports 1, 2, 4 or 6 channels at the moment, so we have to make sure not to request anything else. */
while (wanted_nb_channels > 0 && (wanted_nb_channels == 3 || wanted_nb_channels == 5 || wanted_nb_channels > (SDL_VERSION_ATLEAST(1, 2, 8) ? 6 : 2))) {
wanted_nb_channels--;
wanted_channel_layout = av_get_default_channel_layout(wanted_nb_channels);
}
}
wanted_spec.channels = av_get_channel_layout_nb_channels(wanted_channel_layout);
wanted_spec.freq = avctx->sample_rate;
if (wanted_spec.freq <= 0 || wanted_spec.channels <= 0) {
fprintf(stderr, "Invalid sample rate or channel count!\n");
return -1;
}
}
if (!av_dict_get(opts, "threads", NULL, 0))
av_dict_set(&opts, "threads", "auto", 0);
if (!codec ||
@ -2322,31 +2350,8 @@ static int stream_component_open(VideoState *is, int stream_index)
/* prepare audio output */
if (avctx->codec_type == AVMEDIA_TYPE_AUDIO) {
wanted_spec.format = AUDIO_S16SYS;
wanted_spec.silence = 0;
wanted_spec.samples = SDL_AUDIO_BUFFER_SIZE;
wanted_spec.callback = sdl_audio_callback;
wanted_spec.userdata = is;
if (SDL_OpenAudio(&wanted_spec, &spec) < 0) {
fprintf(stderr, "SDL_OpenAudio: %s\n", SDL_GetError());
if (audio_open(is, avctx->channel_layout, avctx->channels, avctx->sample_rate) < 0)
return -1;
}
is->audio_hw_buf_size = spec.size;
if (spec.format != AUDIO_S16SYS) {
fprintf(stderr, "SDL advised audio format %d is not supported!\n", spec.format);
return -1;
}
if (spec.channels != wanted_spec.channels) {
wanted_channel_layout = av_get_default_channel_layout(spec.channels);
if (!wanted_channel_layout) {
fprintf(stderr, "SDL advised channel count %d is not supported!\n", spec.channels);
return -1;
}
}
is->audio_src_fmt = is->audio_tgt_fmt = AV_SAMPLE_FMT_S16;
is->audio_src_freq = is->audio_tgt_freq = spec.freq;
is->audio_src_channel_layout = is->audio_tgt_channel_layout = wanted_channel_layout;
is->audio_src_channels = is->audio_tgt_channels = spec.channels;
}
ic->streams[stream_index]->discard = AVDISCARD_DEFAULT;
@ -2362,9 +2367,10 @@ static int stream_component_open(VideoState *is, int stream_index)
is->audio_diff_avg_count = 0;
/* since we do not have a precise anough audio fifo fullness,
we correct audio sync only if larger than this threshold */
is->audio_diff_threshold = 2.0 * SDL_AUDIO_BUFFER_SIZE / wanted_spec.freq;
is->audio_diff_threshold = 2.0 * SDL_AUDIO_BUFFER_SIZE / avctx->sample_rate;
memset(&is->audio_pkt, 0, sizeof(is->audio_pkt));
memset(&is->audio_pkt_temp, 0, sizeof(is->audio_pkt_temp));
packet_queue_start(&is->audioq);
SDL_PauseAudio(0);
break;