* 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,
#include "libavutil/channel_layout.h"
#include "libavutil/dict.h"
#include "libavutil/log.h"
+#include "libavutil/mathematics.h"
#include "libavresample/version.h"
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
* 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()
*
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)