---
libavutil/samplefmt.c | 19 +++++++++++++++++++
libavutil/samplefmt.h | 15 +++++++++++++++
2 files changed, 34 insertions(+)
diff --git a/libavutil/samplefmt.c b/libavutil/samplefmt.c
index 711afac..1caddf9 100644
--- a/libavutil/samplefmt.c
+++ b/libavutil/samplefmt.c
@@ -185,3 +185,22 @@ int av_samples_alloc(uint8_t **audio_data, int *linesize,
int nb_channels,
}
return 0;
}
+
+int av_samples_copy(uint8_t **dst, const uint8_t * const *src, int dst_offset,
+ int src_offset, int nb_samples, int nb_channels,
+ enum AVSampleFormat sample_fmt)
+{
+ int planar = av_sample_fmt_is_planar(sample_fmt);
+ int planes = planar ? nb_channels : 1;
+ int bps = av_get_bytes_per_sample(sample_fmt);
+ int data_size = bps * nb_samples * (planar ? 1 : nb_channels);
+ int i;
+
+ dst_offset *= bps * (planar ? 1 : nb_channels);
+ src_offset *= bps * (planar ? 1 : nb_channels);
+
+ for (i = 0; i < planes; i++)
+ memcpy(dst[i] + dst_offset, src[i] + src_offset, data_size);
+
+ return 0;
+}
diff --git a/libavutil/samplefmt.h b/libavutil/samplefmt.h
index 1cb01a3..910fe76 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, const uint8_t * const *src, int dst_offset,
+ int src_offset, int nb_samples, int nb_channels,
+ enum AVSampleFormat sample_fmt);
+
#endif /* AVUTIL_SAMPLEFMT_H */
--
1.7.9.5
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