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avresample: Add avresample_get_out_samples

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Utility function to get the upper bound on the number of samples the
resampler would output.
This commit is contained in:
Luca Barbato
2014-04-30 19:56:05 +02:00
parent c94e2e85cb
commit b2d4565422
4 changed files with 42 additions and 8 deletions
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19
libavresample/utils.c
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@@ -622,6 +622,25 @@ int avresample_available(AVAudioResampleContext *avr)
return av_audio_fifo_size(avr->out_fifo);
}
int avresample_get_out_samples(AVAudioResampleContext *avr, int in_nb_samples)
{
int64_t samples = avresample_get_delay(avr) + (int64_t)in_nb_samples;
if (avr->resample_needed) {
samples = av_rescale_rnd(samples,
avr->out_sample_rate,
avr->in_sample_rate,
AV_ROUND_UP);
}
samples += avresample_available(avr);
if (samples > INT_MAX)
return AVERROR(EINVAL);
return samples;
}
int avresample_read(AVAudioResampleContext *avr, uint8_t **output, int nb_samples)
{
if (!output)