As documented, `av_dup_packet` is broken by design, `av_packet_ref`
matches the AVFrame ref-counted API and can be safely used instead.
---
doc/APIchanges | 2 ++
libavcodec/avcodec.h | 5 ++++-
libavcodec/avpacket.c | 4 ++++
libavformat/matroskaenc.c | 7 +------
libavformat/mux.c | 10 ++++------
5 files changed, 15 insertions(+), 13 deletions(-)
diff --git a/doc/APIchanges b/doc/APIchanges
index 72c1376..70bacb6 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -16,6 +16,8 @@ API changes, most recent first:
2015-xx-xx - xxxxxxx - lavc 57.0.0 - avcodec.h
Deprecate av_free_packet, av_packet_unref replaces it
and resets the packet in a more consistent way.
+ Deprecate av_dup_packet, it is a no-op for most cases,
+ use av_packet_ref to make a non-refcounted AVPacket refcounted.
2015-xx-xx - xxxxxxx - lavc 57.0.0 - qsv.h
Add an API for allocating opaque surfaces.
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 4362aeb..a370e3e 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -3463,12 +3463,15 @@ int av_grow_packet(AVPacket *pkt, int grow_by);
*/
int av_packet_from_data(AVPacket *pkt, uint8_t *data, int size);
+#if FF_API_AVPACKET_OLD_API
/**
* @warning This is a hack - the packet memory allocation stuff is broken. The
* packet is allocated if it was not really allocated.
+ *
+ * @deprecated Use av_packet_ref
*/
+attribute_deprecated
int av_dup_packet(AVPacket *pkt);
-#if FF_API_AVPACKET_OLD_API
/**
* Free a packet.
*
diff --git a/libavcodec/avpacket.c b/libavcodec/avpacket.c
index eaea061..cec5bf8 100644
--- a/libavcodec/avpacket.c
+++ b/libavcodec/avpacket.c
@@ -128,6 +128,8 @@ int av_packet_from_data(AVPacket *pkt, uint8_t *data, int
size)
return 0;
}
+#if FF_API_AVPACKET_OLD_API
+FF_DISABLE_DEPRECATION_WARNINGS
#define ALLOC_MALLOC(data, size) data = av_malloc(size)
#define ALLOC_BUF(data, size) \
do { \
@@ -187,6 +189,8 @@ failed_alloc:
av_packet_unref(pkt);
return AVERROR(ENOMEM);
}
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
void av_packet_free_side_data(AVPacket *pkt)
{
diff --git a/libavformat/matroskaenc.c b/libavformat/matroskaenc.c
index f1bd272..baffd54 100644
--- a/libavformat/matroskaenc.c
+++ b/libavformat/matroskaenc.c
@@ -1608,12 +1608,7 @@ static int mkv_write_packet(AVFormatContext *s, AVPacket
*pkt)
// buffer an audio packet to ensure the packet containing the video
// keyframe's timecode is contained in the same cluster for WebM
if (codec_type == AVMEDIA_TYPE_AUDIO) {
- mkv->cur_audio_pkt = *pkt;
- if (pkt->buf) {
- mkv->cur_audio_pkt.buf = av_buffer_ref(pkt->buf);
- ret = mkv->cur_audio_pkt.buf ? 0 : AVERROR(ENOMEM);
- } else
- ret = av_dup_packet(&mkv->cur_audio_pkt);
+ ret = av_packet_ref(&mkv->cur_audio_pkt, pkt);
} else
ret = mkv_write_packet_internal(s, pkt);
return ret;
diff --git a/libavformat/mux.c b/libavformat/mux.c
index e86d202..4a81e36 100644
--- a/libavformat/mux.c
+++ b/libavformat/mux.c
@@ -416,12 +416,8 @@ int ff_interleave_add_packet(AVFormatContext *s, AVPacket
*pkt,
this_pktl = av_mallocz(sizeof(AVPacketList));
if (!this_pktl)
return AVERROR(ENOMEM);
- this_pktl->pkt = *pkt;
- pkt->buf = NULL;
- pkt->side_data = NULL;
- pkt->side_data_elems = 0;
- // Duplicate the packet if it uses non-allocated memory
- if ((ret = av_dup_packet(&this_pktl->pkt)) < 0) {
+
+ if ((ret = av_packet_ref(&this_pktl->pkt, pkt)) < 0) {
av_free(this_pktl);
return ret;
}
@@ -450,6 +446,8 @@ next_non_null:
s->streams[pkt->stream_index]->last_in_packet_buffer =
*next_point = this_pktl;
+ av_packet_unref(pkt);
+
return 0;
}
--
2.5.0
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