[FFmpeg-devel] [PATCH 5/6] lavf: add API to append a bsf to a stream's list

[Rodger Combs]

---
 libavformat/avformat.h | 12 ++++++++++++
 libavformat/utils.c    | 20 ++++++++++++++++++++
 2 files changed, 32 insertions(+)

diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index bb3a674..33f6d28 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -2799,6 +2799,18 @@ int avformat_match_stream_specifier(AVFormatContext *s, AVStream *st,
 int avformat_queue_attached_pictures(AVFormatContext *s);
 
 /**
+ * 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 av_stream_add_bitstream_filter(AVStream *st, const char *name,
+                                   const char *args);
+
+/**
  * Apply a list of bitstream filters to a packet.
  *
  * @param codec AVCodecContext, usually from an AVStream
diff --git a/libavformat/utils.c b/libavformat/utils.c
index dcacf44..8f22c32 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -4631,6 +4631,26 @@ uint8_t *av_stream_new_side_data(AVStream *st, enum AVPacketSideDataType type,
     return data;
 }
 
+int av_stream_add_bitstream_filter(AVStream *st, const char *name,
+                                   const char *args)
+{
+    AVBitStreamFilterContext *bsfc = NULL;
+    AVBitStreamFilterContext **dest = &st->bsfc;
+    while (*dest && (*dest)->next)
+        dest = &(*dest)->next;
+
+    if (!(bsfc = av_bitstream_filter_init(name))) {
+        av_log(NULL, AV_LOG_FATAL, "Unknown bitstream filter %s\n", name);
+        return AVERROR(EINVAL);
+    }
+    if (args && !(bsfc->args = av_strdup(args))) {
+        av_bitstream_filter_close(bsfc);
+        return AVERROR(ENOMEM);
+    }
+    *dest = bsfc;
+    return 1;
+}
+
 int av_apply_bitstream_filters(AVCodecContext *codec, AVPacket *pkt,
                                AVBitStreamFilterContext *bsfc)
 {
-- 
2.6.3