[FFmpeg-devel] [PATCH] lavc/avcodec.h: document bitstream filter API

[Stefano Sabatini]

---
 libavcodec/avcodec.h | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)

diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index c38b46d..12a11aa 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -4620,14 +4620,63 @@ typedef struct AVBitStreamFilter {
     struct AVBitStreamFilter *next;
 } AVBitStreamFilter;
 
+/**
+ * Register the bitstream filter bsf.
+ *
+ * The filter will be accessible to the appliclation code through
+ * av_bitstream_filter_next() or can be directly initialized with
+ * av_bitstream_filter_init().
+ *
+ * @see avcodec_register_all()
+ */
 void av_register_bitstream_filter(AVBitStreamFilter *bsf);
+
+/**
+ * Create and initialize a bitstream filter context given a bitstream
+ * filter name.
+ *
+ * The returned context must be freed with av_bitstream_filter_close().
+ *
+ * @param name the name of the bitstream filter
+ * @return a bitstream context if a corresponding filter was found and
+ * successfully initialized, NULL otherwise.
+ */
 AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
+
+/**
+ * Filter bitstream.
+ *
+ * This function filters the buffer buf with size buf_size, and put the
+ * filtered buffer in the buffer pointed to by poutbuf.
+ *
+ * The output buffer must be freed by the caller.
+ *
+ * @param bsfc            bitstream filter context created by av_bitstream_filter_init()
+ * @param avctx           AVCodecContext accessed by the filter, may be NULL
+ * @param args            arguments which specify the filter behavior or configuration
+ * @param poutbuf         pointer which is updated to point to the filtered buffer
+ * @param poutbuf_size    pointer which is updated to the filtered buffer size in bytes
+ * @param buf             buffer containing the data to filter
+ * @param buf_size        size in bytes of buf
+ * @param keyframe        set to non-zero if the buffer to filter corresponds to a key-frame packet data
+ * @return >= 0 in case of success, a negative code in case of failure
+ */
 int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
                                AVCodecContext *avctx, const char *args,
                                uint8_t **poutbuf, int *poutbuf_size,
                                const uint8_t *buf, int buf_size, int keyframe);
+
+/**
+ * Release bitstream filter context bsf, which was created with
+ * av_bitstream_filter_init().
+ */
 void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
 
+/**
+ * If f is NULL, return the first registered bitstream filter,
+ * if f is non-NULL, return the next registered bitstream filter
+ * after f, or NULL if f is the last one.
+ */
 AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f);
 
 /* memory */
-- 
1.8.1.2