samplefmt: add a function for copying audio samples.

1 files changed, 15 insertions, 0 deletions

diff --git a/libavutil/samplefmt.h b/libavutil/samplefmt.h
index 1cb01a357f..9011889e68 100644
--- a/libavutil/samplefmt.h
+++ b/libavutil/samplefmt.h
@@ -194,4 +194,19 @@ int av_samples_fill_arrays(uint8_t **audio_data, int *linesize,
 int av_samples_alloc(uint8_t **audio_data, int *linesize, int nb_channels,
                      int nb_samples, enum AVSampleFormat sample_fmt, int align);
 
+/**
+ * Copy samples from src to dst.
+ *
+ * @param dst destination array of pointers to data planes
+ * @param src source array of pointers to data planes
+ * @param dst_offset offset in samples at which the data will be written to dst
+ * @param src_offset offset in samples at which the data will be read from src
+ * @param nb_samples number of samples to be copied
+ * @param nb_channels number of audio channels
+ * @param sample_fmt audio sample format
+ */
+int av_samples_copy(uint8_t **dst, uint8_t * const *src, int dst_offset,
+                    int src_offset, int nb_samples, int nb_channels,
+                    enum AVSampleFormat sample_fmt);
+
 #endif /* AVUTIL_SAMPLEFMT_H */