Function frame_data_ensure

fftools/ffmpeg.c:413–475

}

static int frame_data_ensure(AVBufferRef **dst, int writable)
{
    AVBufferRef *src = *dst;

    if (!src || (writable && !av_buffer_is_writable(src))) {
        FrameData *fd;

        fd = av_mallocz(sizeof(*fd));
        if (!fd)
            return AVERROR(ENOMEM);

        *dst = av_buffer_create((uint8_t *)fd, sizeof(*fd),
                                frame_data_free, NULL, 0);
        if (!*dst) {
            av_buffer_unref(&src);
            av_freep(&fd);
            return AVERROR(ENOMEM);
        }

        if (src) {
            const FrameData *fd_src = (const FrameData *)src->data;

            memcpy(fd, fd_src, sizeof(*fd));
            fd->par_enc = NULL;
            fd->side_data = NULL;
            fd->nb_side_data = 0;

            if (fd_src->par_enc) {
                int ret = 0;

                fd->par_enc = avcodec_parameters_alloc();
                ret = fd->par_enc ?
                      avcodec_parameters_copy(fd->par_enc, fd_src->par_enc) :
                      AVERROR(ENOMEM);
                if (ret < 0) {
                    av_buffer_unref(dst);
                    av_buffer_unref(&src);
                    return ret;
                }
            }

            if (fd_src->nb_side_data) {
                int ret = clone_side_data(&fd->side_data, &fd->nb_side_data,
                                          fd_src->side_data, fd_src->nb_side_data, 0);
                if (ret < 0) {
                    av_buffer_unref(dst);
                    av_buffer_unref(&src);
                    return ret;
                }
            }

            av_buffer_unref(&src);
        } else {
            fd->dec.frame_num = UINT64_MAX;
            fd->dec.pts       = AV_NOPTS_VALUE;

            for (unsigned i = 0; i < FF_ARRAY_ELEMS(fd->wallclock); i++)
                fd->wallclock[i] = INT64_MIN;