diff --git a/libavformat/internal.h b/libavformat/internal.h index 0e59da0c2d..2cb3481f8c 100644 --- a/libavformat/internal.h +++ b/libavformat/internal.h @@ -464,6 +464,17 @@ enum AVChromaLocation ff_choose_chroma_location(AVFormatContext *s, AVStream *st */ int ff_generate_avci_extradata(AVStream *st); +/** + * Add a bitstream filter to a stream. + * + * @param st output stream to add a filter to + * @param name the name of the filter to add + * @param args filter-specific argument string + * @return >0 on success; + * AVERROR code on failure + */ +int ff_stream_add_bitstream_filter(AVStream *st, const char *name, const char *args); + /** * Wrap errno on rename() error. * diff --git a/libavformat/utils.c b/libavformat/utils.c index 7e101a4fd3..95acbf3251 100644 --- a/libavformat/utils.c +++ b/libavformat/utils.c @@ -4651,6 +4651,28 @@ uint8_t *av_stream_new_side_data(AVStream *st, enum AVPacketSideDataType type, return data; } +int ff_stream_add_bitstream_filter(AVStream *st, const char *name, const char *args) +{ + AVBitStreamFilterContext *bsfc = NULL; + AVBitStreamFilterContext **dest = &st->internal->bsfc; + while (*dest && (*dest)->next) + dest = &(*dest)->next; + + if (!(bsfc = av_bitstream_filter_init(name))) { + av_log(NULL, AV_LOG_ERROR, "Unknown bitstream filter '%s'\n", name); + return AVERROR(EINVAL); + } + if (args && !(bsfc->args = av_strdup(args))) { + av_bitstream_filter_close(bsfc); + return AVERROR(ENOMEM); + } + av_log(st->codec, AV_LOG_VERBOSE, + "Automatically inserted bitstream filter '%s'; args='%s'\n", + name, args ? args : ""); + *dest = bsfc; + return 1; +} + int av_apply_bitstream_filters(AVCodecContext *codec, AVPacket *pkt, AVBitStreamFilterContext *bsfc) {