[PATCH 1/2] move visual presentation dims (apertures) from tkhd to clef atom

[Maksym Veremeyenko]

---
 libavformat/movenc.c |   40 +++++++++++++++++++++++++++++++++++-----
 1 files changed, 35 insertions(+), 5 deletions(-)

diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index 0949d29..8a85cd4 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -1215,11 +1215,8 @@ static int mov_write_tkhd_tag(ByteIOContext *pb, MOVTrack *track, AVStream *st)
     /* Track width and height, for visual only */
     if(st && (track->enc->codec_type == AVMEDIA_TYPE_VIDEO ||
               track->enc->codec_type == AVMEDIA_TYPE_SUBTITLE)) {
-        double sample_aspect_ratio = av_q2d(st->sample_aspect_ratio);
-        if(!sample_aspect_ratio || track->height != track->enc->height)
-            sample_aspect_ratio = 1;
-        put_be32(pb, sample_aspect_ratio * track->enc->width*0x10000);
-        put_be32(pb, track->height*0x10000);
+        put_be32(pb, track->enc->width << 16);
+        put_be32(pb, track->height << 16);
     }
     else {
         put_be32(pb, 0);
@@ -1228,6 +1225,36 @@ static int mov_write_tkhd_tag(ByteIOContext *pb, MOVTrack *track, AVStream *st)
     return 0x5c;
 }
 
+static int mov_write_clef_tag(ByteIOContext *pb, MOVTrack *track)
+{
+    int32_t width;
+    double sample_aspect_ratio;
+
+    sample_aspect_ratio = av_q2d(track->enc->sample_aspect_ratio);
+
+    if(!sample_aspect_ratio || track->height != track->enc->height)
+        sample_aspect_ratio = 1;
+
+    width = sample_aspect_ratio * track->enc->width;
+
+    put_be32(pb, 0x14);
+    put_tag(pb, "clef");
+    put_be32(pb, 0);
+    put_be32(pb, width << 16);
+    put_be32(pb, track->height << 16);
+
+    return 0x14;
+};
+
+static int mov_write_tapt_tag(ByteIOContext *pb, MOVTrack *track)
+{
+    int64_t pos = url_ftell(pb);
+    put_be32(pb, 0); /* size */
+    put_tag(pb, "tapt");
+    mov_write_clef_tag(pb, track);
+    return updateSize(pb, pos);
+};
+
 // This box seems important for the psp playback ... without it the movie seems to hang
 static int mov_write_edts_tag(ByteIOContext *pb, MOVTrack *track)
 {
@@ -1310,6 +1337,9 @@ static int mov_write_trak_tag(ByteIOContext *pb, MOVTrack *track, AVStream *st)
         mov_write_uuid_tag_psp(pb,track);  // PSP Movies require this uuid box
     if (track->tag == MKTAG('r','t','p',' '))
         mov_write_udta_sdp(pb, track->rtp_ctx->streams[0]->codec, track->trackID);
+    if (track->enc->codec_type == AVMEDIA_TYPE_VIDEO)
+        mov_write_tapt_tag(pb, track);
+
     return updateSize(pb, pos);
 }
 
-- 
1.7.3.5


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Content-Type: text/x-patch;
 name="0002-store-pasp-atom-for-all-types-of-quicktime-movie.patch"
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
 filename="0002-store-pasp-atom-for-all-types-of-quicktime-movie.patch"