+
+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)
+{
+ int planar = av_sample_fmt_is_planar(sample_fmt);
+ int planes = planar ? nb_channels : 1;
+ int block_align = av_get_bytes_per_sample(sample_fmt) * (planar ? 1 : nb_channels);
+ int data_size = nb_samples * block_align;
+ int i;
+
+ dst_offset *= block_align;
+ src_offset *= block_align;
+
+ for (i = 0; i < planes; i++)
+ memcpy(dst[i] + dst_offset, src[i] + src_offset, data_size);
+
+ return 0;
+}
+
+int av_samples_set_silence(uint8_t **audio_data, int 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 block_align = av_get_bytes_per_sample(sample_fmt) * (planar ? 1 : nb_channels);
+ int data_size = nb_samples * block_align;
+ int fill_char = (sample_fmt == AV_SAMPLE_FMT_U8 ||
+ sample_fmt == AV_SAMPLE_FMT_U8P) ? 0x80 : 0x00;
+ int i;
+
+ offset *= block_align;
+
+ for (i = 0; i < planes; i++)
+ memset(audio_data[i] + offset, fill_char, data_size);
+
+ return 0;
+}