Function av_bsf_init

libavcodec/bsf.c:149–188

}

int av_bsf_init(AVBSFContext *ctx)
{
    int ret, i;

    /* check that the codec is supported */
    if (ctx->filter->codec_ids) {
        for (i = 0; ctx->filter->codec_ids[i] != AV_CODEC_ID_NONE; i++)
            if (ctx->par_in->codec_id == ctx->filter->codec_ids[i])
                break;
        if (ctx->filter->codec_ids[i] == AV_CODEC_ID_NONE) {
            const AVCodecDescriptor *desc = avcodec_descriptor_get(ctx->par_in->codec_id);
            av_log(ctx, AV_LOG_ERROR, "Codec '%s' (%d) is not supported by the "
                   "bitstream filter '%s'. Supported codecs are: ",
                   desc ? desc->name : "unknown", ctx->par_in->codec_id, ctx->filter->name);
            for (i = 0; ctx->filter->codec_ids[i] != AV_CODEC_ID_NONE; i++) {
                enum AVCodecID codec_id = ctx->filter->codec_ids[i];
                av_log(ctx, AV_LOG_ERROR, "%s (%d) ",
                       avcodec_get_name(codec_id), codec_id);
            }
            av_log(ctx, AV_LOG_ERROR, "\n");
            return AVERROR(EINVAL);
        }
    }

    /* initialize output parameters to be the same as input
     * init below might overwrite that */
    ret = avcodec_parameters_copy(ctx->par_out, ctx->par_in);
    if (ret < 0)
        return ret;

    ctx->time_base_out = ctx->time_base_in;

    if (ff_bsf(ctx->filter)->init) {
        ret = ff_bsf(ctx->filter)->init(ctx);
        if (ret < 0)
            return ret;
    }

    return 0;
}

void av_bsf_flush(AVBSFContext *ctx)
{