Function avcodec_parameters_copy

libavcodec/codec_par.c:107–136

}

int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
{
    int ret;

    codec_parameters_reset(dst);
    memcpy(dst, src, sizeof(*dst));

    dst->ch_layout      = (AVChannelLayout){0};
    dst->extradata      = NULL;
    dst->extradata_size = 0;
    dst->coded_side_data      = NULL;
    dst->nb_coded_side_data   = 0;
    if (src->extradata) {
        dst->extradata = av_mallocz(src->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
        if (!dst->extradata)
            return AVERROR(ENOMEM);
        memcpy(dst->extradata, src->extradata, src->extradata_size);
        dst->extradata_size = src->extradata_size;
    }
    ret = codec_parameters_copy_side_data(&dst->coded_side_data, &dst->nb_coded_side_data,
                                           src->coded_side_data,  src->nb_coded_side_data);
    if (ret < 0)
        return ret;

    ret = av_channel_layout_copy(&dst->ch_layout, &src->ch_layout);
    if (ret < 0)
        return ret;

    return 0;
}

int avcodec_parameters_from_context(AVCodecParameters *par,
                                    const AVCodecContext *codec)