diff options
author | Luca Barbato <lu_zero@gentoo.org> | 2014-04-30 21:56:05 +0400 |
---|---|---|
committer | Luca Barbato <lu_zero@gentoo.org> | 2014-05-29 00:04:56 +0400 |
commit | b2d45654220503224aa94e78cdff19ec624e9342 (patch) | |
tree | 7aa8f0cd4eed0bef5865ea8b58c0267ac89032ec /libavresample/avresample.h | |
parent | c94e2e85cb6af8a570d8542a830556243bd32873 (diff) |
avresample: Add avresample_get_out_samples
Utility function to get the upper bound on the number of samples the
resampler would output.
Diffstat (limited to 'libavresample/avresample.h')
-rw-r--r-- | libavresample/avresample.h | 26 |
1 files changed, 19 insertions, 7 deletions
diff --git a/libavresample/avresample.h b/libavresample/avresample.h index 3358628e37..6105759399 100644 --- a/libavresample/avresample.h +++ b/libavresample/avresample.h @@ -76,9 +76,8 @@ * while (get_input(&input, &in_linesize, &in_samples)) { * uint8_t *output * int out_linesize; - * int out_samples = avresample_available(avr) + - * av_rescale_rnd(avresample_get_delay(avr) + - * in_samples, 44100, 48000, AV_ROUND_UP); + * int out_samples = avresample_get_out_samples(avr, in_samples); + * * av_samples_alloc(&output, &out_linesize, 2, out_samples, * AV_SAMPLE_FMT_S16, 0); * out_samples = avresample_convert(avr, &output, out_linesize, out_samples, @@ -97,6 +96,7 @@ #include "libavutil/channel_layout.h" #include "libavutil/dict.h" #include "libavutil/log.h" +#include "libavutil/mathematics.h" #include "libavresample/version.h" @@ -313,11 +313,23 @@ int avresample_set_compensation(AVAudioResampleContext *avr, int sample_delta, int compensation_distance); /** + * Provide the upper bound on the number of samples the configured + * conversion would output. + * + * @param avr audio resample context + * @param in_nb_samples number of input samples + * + * @return number of samples or AVERROR(EINVAL) if the value + * would exceed INT_MAX + */ + +int avresample_get_out_samples(AVAudioResampleContext *avr, int in_nb_samples); + +/** * Convert input samples and write them to the output FIFO. * - * The upper bound on the number of output samples is given by - * avresample_available() + (avresample_get_delay() + number of input samples) * - * output sample rate / input sample rate. + * The upper bound on the number of output samples can be obtained through + * avresample_get_out_samples(). * * The output data can be NULL or have fewer allocated samples than required. * In this case, any remaining samples not written to the output will be added @@ -334,7 +346,7 @@ int avresample_set_compensation(AVAudioResampleContext *avr, int sample_delta, * samples. To get this data as output, either call avresample_convert() with * NULL input or call avresample_read(). * - * @see avresample_available() + * @see avresample_get_out_samples() * @see avresample_read() * @see avresample_get_delay() * |