Merge commit '7751e4693dd10ec98c20fbd9887233b575034272'

* commit '7751e4693dd10ec98c20fbd9887233b575034272':
  ogg: check that the expected number of headers had been parsed
  libx264: change default to closed gop to match x264cli
  Use avcodec_free_frame() to free AVFrames.
  lavf: use a malloced AVFrame in try_decode_frame().
  lavc: add avcodec_free_frame().
  lavc: ensure extended_data is set properly on decoding
  lavc: initialize AVFrame.extended_data in avcodec_get_frame_defaults()
  lavc: use av_mallocz to allocate AVFrames.
  lavc: rename the argument of avcodec_alloc_frame/get_frame_defaults

Conflicts:
	doc/APIchanges
	doc/examples/decoding_encoding.c
	libavcodec/utils.c
	libavcodec/version.h
	libavfilter/src_movie.c
	libavformat/oggdec.c
	libavformat/oggdec.h
	libavformat/oggparsetheora.c
	libavformat/utils.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>

4 files changed, 69 insertions, 19 deletions

diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 0d643478f6..f6522d1d1a 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -3509,7 +3509,7 @@ int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src);
 
 /**
  * Allocate an AVFrame and set its fields to default values.  The resulting
- * struct can be deallocated by simply calling av_free().
+ * struct must be freed using avcodec_free_frame().
  *
  * @return An AVFrame filled with default values or NULL on failure.
  * @see avcodec_get_frame_defaults
@@ -3519,9 +3519,21 @@ AVFrame *avcodec_alloc_frame(void);
 /**
  * Set the fields of the given AVFrame to default values.
  *
- * @param pic The AVFrame of which the fields should be set to default values.
+ * @param frame The AVFrame of which the fields should be set to default values.
  */
-void avcodec_get_frame_defaults(AVFrame *pic);
+void avcodec_get_frame_defaults(AVFrame *frame);
+
+/**
+ * Free the frame and any dynamically allocated objects in it,
+ * e.g. extended_data.
+ *
+ * @param frame frame to be freed. The pointer will be set to NULL.
+ *
+ * @warning this function does NOT free the data buffers themselves
+ * (it does not know how, since they might have been allocated with
+ *  a custom get_buffer()).
+ */
+void avcodec_free_frame(AVFrame **frame);
 
 #if FF_API_AVCODEC_OPEN
 /**
diff --git a/libavcodec/libx264.c b/libavcodec/libx264.c
index 2c4ffa205a..d012c92a48 100644
--- a/libavcodec/libx264.c
+++ b/libavcodec/libx264.c
@@ -694,6 +694,7 @@ static const AVCodecDefault x264_defaults[] = {
     { "cmp",              "-1" },
     { "threads",          AV_STRINGIFY(X264_THREADS_AUTO) },
     { "thread_type",      "0" },
+    { "flags",            "+cgop" },
     { NULL },
 };
 
diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index 79bfe1d355..b95b419955 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -695,31 +695,54 @@ enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum
     return fmt[0];
 }
 
-void avcodec_get_frame_defaults(AVFrame *pic)
+void avcodec_get_frame_defaults(AVFrame *frame)
 {
-    memset(pic, 0, sizeof(AVFrame));
+#if LIBAVCODEC_VERSION_MAJOR >= 55
+     // extended_data should explicitly be freed when needed, this code is unsafe currently
+     // also this is not compatible to the <55 ABI/API
+    if (frame->extended_data != frame->data && 0)
+        av_freep(&frame->extended_data);
+#endif
 
-    pic->pts                   =
-    pic->pkt_dts               =
-    pic->pkt_pts               =
-    pic->best_effort_timestamp = AV_NOPTS_VALUE;
-    pic->pkt_duration        = 0;
-    pic->pkt_pos             = -1;
-    pic->key_frame           = 1;
-    pic->sample_aspect_ratio = (AVRational) {0, 1 };
-    pic->format              = -1; /* unknown */
+    memset(frame, 0, sizeof(AVFrame));
+
+    frame->pts                   =
+    frame->pkt_dts               =
+    frame->pkt_pts               =
+    frame->best_effort_timestamp = AV_NOPTS_VALUE;
+    frame->pkt_duration        = 0;
+    frame->pkt_pos             = -1;
+    frame->key_frame           = 1;
+    frame->sample_aspect_ratio = (AVRational) {0, 1 };
+    frame->format              = -1; /* unknown */
+    frame->extended_data       = frame->data;
 }
 
 AVFrame *avcodec_alloc_frame(void)
 {
-    AVFrame *pic = av_malloc(sizeof(AVFrame));
+    AVFrame *frame = av_mallocz(sizeof(AVFrame));
 
-    if (pic == NULL)
+    if (frame == NULL)
         return NULL;
 
-    avcodec_get_frame_defaults(pic);
+    avcodec_get_frame_defaults(frame);
 
-    return pic;
+    return frame;
+}
+
+void avcodec_free_frame(AVFrame **frame)
+{
+    AVFrame *f;
+
+    if (!frame || !*frame)
+        return;
+
+    f = *frame;
+
+    if (f->extended_data != f->data)
+        av_freep(&f->extended_data);
+
+    av_freep(frame);
 }
 
 #define MAKE_ACCESSORS(str, name, type, field) \
@@ -1572,6 +1595,10 @@ int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *pi
     } else
         ret = 0;
 
+    /* many decoders assign whole AVFrames, thus overwriting extended_data;
+     * make sure it's set correctly */
+    picture->extended_data = picture->data;
+
     return ret;
 }
 
@@ -1629,6 +1656,7 @@ int attribute_align_arg avcodec_decode_audio4(AVCodecContext *avctx,
                                               int *got_frame_ptr,
                                               const AVPacket *avpkt)
 {
+    int planar, channels;
     int ret = 0;
 
     *got_frame_ptr = 0;
@@ -1710,6 +1738,15 @@ int attribute_align_arg avcodec_decode_audio4(AVCodecContext *avctx,
                 ret = avpkt->size;
         }
     }
+
+    /* many decoders assign whole AVFrames, thus overwriting extended_data;
+     * make sure it's set correctly; assume decoders that actually use
+     * extended_data are doing it correctly */
+    planar   = av_sample_fmt_is_planar(frame->format);
+    channels = av_get_channel_layout_nb_channels(frame->channel_layout);
+    if (!(planar && channels > AV_NUM_DATA_POINTERS))
+        frame->extended_data = frame->data;
+
     return ret;
 }
 
diff --git a/libavcodec/version.h b/libavcodec/version.h
index c1d0b7669d..d96086a4a6 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -27,7 +27,7 @@
  */
 
 #define LIBAVCODEC_VERSION_MAJOR 54
-#define LIBAVCODEC_VERSION_MINOR 58
+#define LIBAVCODEC_VERSION_MINOR 59
 #define LIBAVCODEC_VERSION_MICRO 100
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \