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ffplay: precalculate audio output frame size and byte per sec

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Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Marton Balint 2013-12-15 19:51:32 +01:00
parent f4c62b9f64
commit e98cd24a89
1 changed files with 8 additions and 0 deletions
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8
ffplay.c
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@ -145,6 +145,8 @@ typedef struct AudioParams {
int channels;
int64_t channel_layout;
enum AVSampleFormat fmt;
int frame_size;
int bytes_per_sec;
} AudioParams;
typedef struct Clock {
@ -2468,6 +2470,12 @@ static int audio_open(void *opaque, int64_t wanted_channel_layout, int wanted_nb
audio_hw_params->freq = spec.freq;
audio_hw_params->channel_layout = wanted_channel_layout;
audio_hw_params->channels = spec.channels;
audio_hw_params->frame_size = av_samples_get_buffer_size(NULL, audio_hw_params->channels, 1, audio_hw_params->fmt, 1);
audio_hw_params->bytes_per_sec = av_samples_get_buffer_size(NULL, audio_hw_params->channels, audio_hw_params->freq, audio_hw_params->fmt, 1);
if (audio_hw_params->bytes_per_sec <= 0 || audio_hw_params->frame_size <= 0) {
av_log(NULL, AV_LOG_ERROR, "av_samples_get_buffer_size failed\n");
return -1;
}
return spec.size;
}