libhb: fix mp4 audio track titles

mp4 audio track titles were not being applied by libavformat


git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@6270 b64f7644-9d1e-0410-96f1-a4d463321fa5

1 files changed, 133 insertions, 0 deletions

diff --git a/contrib/ffmpeg/A03-mp4-track-title.patch b/contrib/ffmpeg/A03-mp4-track-title.patch
new file mode 100644
index 000000000..25ad12cb6
--- /dev/null
+++ b/contrib/ffmpeg/A03-mp4-track-title.patch
@@ -0,0 +1,133 @@
+diff --git a/libavformat/movenc.c b/libavformat/movenc.c
+index 0c688f6..f89b630 100644
+--- a/libavformat/movenc.c
++++ b/libavformat/movenc.c
+@@ -76,6 +76,17 @@ static const AVClass flavor ## _muxer_class = {\
+     .version    = LIBAVUTIL_VERSION_INT,\
+ };
+ 
++static int utf8len(const uint8_t *b)
++{
++    int len = 0;
++    int val;
++    while (*b) {
++        GET_UTF8(val, *b++, return -1;)
++        len++;
++    }
++    return len;
++}
++
+ //FIXME support 64 bit variant with wide placeholders
+ static int64_t update_size(AVIOContext *pb, int64_t pos)
+ {
+@@ -1325,6 +1336,15 @@ static int mov_write_hdlr_tag(AVIOContext *pb, MOVTrack *track)
+                    "Unknown hldr_type for %s / 0x%04X, writing dummy values\n",
+                    tag_buf, track->enc->codec_tag);
+         }
++        if (track->st) {
++            // hdlr.name is used by some players to identify the content title
++            // of the track. So if an alternate handler description is
++            // specified, use it.
++            AVDictionaryEntry *t;
++            t = av_dict_get(track->st->metadata, "handler", NULL, 0);
++            if (t && utf8len(t->value))
++                descr = t->value;
++        }
+     }
+ 
+     avio_wb32(pb, 0); /* size */
+@@ -1623,6 +1643,47 @@ static int mov_write_udta_sdp(AVIOContext *pb, MOVTrack *track)
+     return len + 24;
+ }
+ 
++static int mov_write_track_metadata(AVIOContext *pb, AVStream *st,
++                                    const char *tag, const char *str)
++{
++    int64_t pos = avio_tell(pb);
++    AVDictionaryEntry *t = av_dict_get(st->metadata, str, NULL, 0);
++    if (!t || !utf8len(t->value))
++        return 0;
++
++    avio_wb32(pb, 0);   /* size */
++    ffio_wfourcc(pb, tag); /* type */
++    avio_write(pb, t->value, strlen(t->value)); /* UTF8 string value */
++    return update_size(pb, pos);
++}
++
++static int mov_write_track_udta_tag(AVIOContext *pb, MOVMuxContext *mov,
++                                    AVStream *st)
++{
++    AVIOContext *pb_buf;
++    int ret, size;
++    uint8_t *buf;
++
++    if (st == NULL)
++        return 0;
++
++    ret = avio_open_dyn_buf(&pb_buf);
++    if (ret < 0)
++        return ret;
++
++    if (mov->mode & MODE_MP4)
++        mov_write_track_metadata(pb_buf, st, "name", "title");
++
++    if ((size = avio_close_dyn_buf(pb_buf, &buf)) > 0) {
++        avio_wb32(pb, size + 8);
++        ffio_wfourcc(pb, "udta");
++        avio_write(pb, buf, size);
++    }
++    av_free(buf);
++
++    return 0;
++}
++
+ static int mov_write_trak_tag(AVIOContext *pb, MOVMuxContext *mov,
+                               MOVTrack *track, AVStream *st)
+ {
+@@ -1647,6 +1708,7 @@ static int mov_write_trak_tag(AVIOContext *pb, MOVMuxContext *mov,
+         if (0.0 != sample_aspect_ratio && 1.0 != sample_aspect_ratio)
+             mov_write_tapt_tag(pb, track);
+     }
++    mov_write_track_udta_tag(pb, mov, st);
+     return update_size(pb, pos);
+ }
+ 
+@@ -1904,17 +1966,6 @@ static int mov_write_meta_tag(AVIOContext *pb, MOVMuxContext *mov,
+     return size;
+ }
+ 
+-static int utf8len(const uint8_t *b)
+-{
+-    int len = 0;
+-    int val;
+-    while (*b) {
+-        GET_UTF8(val, *b++, return -1;)
+-        len++;
+-    }
+-    return len;
+-}
+-
+ static int ascii_to_wc(AVIOContext *pb, const uint8_t *b)
+ {
+     int val;
+@@ -3266,6 +3317,7 @@ static int mov_write_header(AVFormatContext *s)
+         MOVTrack *track= &mov->tracks[i];
+         AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL,0);
+ 
++        track->st = st;
+         track->enc = st->codec;
+         track->language = ff_mov_iso639_to_lang(lang?lang->value:"und", mov->mode!=MODE_MOV);
+         if (track->language < 0)
+diff --git a/libavformat/movenc.h b/libavformat/movenc.h
+index 226a28f..687299e 100644
+--- a/libavformat/movenc.h
++++ b/libavformat/movenc.h
+@@ -133,6 +133,8 @@ typedef struct MOVTrack {
+         int     packet_entry;
+         int     slices;
+     } vc1_info;
++
++    AVStream    *st;
+ } MOVTrack;
+ 
+ typedef struct MOVMuxContext {