[FFmpeg-cvslog] r22928 - in trunk/libavformat: isom.h mov.c
conrad
subversion
Wed Apr 21 08:36:10 CEST 2010
Author: conrad
Date: Wed Apr 21 08:36:09 2010
New Revision: 22928
Log:
mov: Read QuickTime chapters
Modified:
trunk/libavformat/isom.h
trunk/libavformat/mov.c
Modified: trunk/libavformat/isom.h
==============================================================================
--- trunk/libavformat/isom.h Wed Apr 21 08:36:05 2010 (r22927)
+++ trunk/libavformat/isom.h Wed Apr 21 08:36:09 2010 (r22928)
@@ -138,6 +138,7 @@ typedef struct MOVContext {
MOVTrackExt *trex_data;
unsigned trex_count;
int itunes_metadata; ///< metadata are itunes style
+ int chapter_track;
} MOVContext;
int ff_mp4_read_descr_len(ByteIOContext *pb);
Modified: trunk/libavformat/mov.c
==============================================================================
--- trunk/libavformat/mov.c Wed Apr 21 08:36:05 2010 (r22927)
+++ trunk/libavformat/mov.c Wed Apr 21 08:36:09 2010 (r22928)
@@ -1953,6 +1953,12 @@ static int mov_read_tfhd(MOVContext *c,
return 0;
}
+static int mov_read_chap(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
+{
+ c->chapter_track = get_be32(pb);
+ return 0;
+}
+
static int mov_read_trex(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
{
MOVTrackExt *trex;
@@ -2200,6 +2206,8 @@ static const MOVParseTableEntry mov_defa
{ MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
{ MKTAG('t','r','a','k'), mov_read_trak },
{ MKTAG('t','r','a','f'), mov_read_default },
+{ MKTAG('t','r','e','f'), mov_read_default },
+{ MKTAG('c','h','a','p'), mov_read_chap },
{ MKTAG('t','r','e','x'), mov_read_trex },
{ MKTAG('t','r','u','n'), mov_read_trun },
{ MKTAG('u','d','t','a'), mov_read_default },
@@ -2255,6 +2263,73 @@ static int mov_probe(AVProbeData *p)
return score;
}
+// must be done after parsing all trak because there's no order requirement
+static void mov_read_chapters(AVFormatContext *s)
+{
+ MOVContext *mov = s->priv_data;
+ AVStream *st = NULL;
+ MOVStreamContext *sc;
+ int64_t cur_pos;
+ uint8_t *title = NULL;
+ int i, len, i8, i16;
+
+ for (i = 0; i < s->nb_streams; i++)
+ if (s->streams[i]->id == mov->chapter_track) {
+ st = s->streams[i];
+ break;
+ }
+ if (!st) {
+ av_log(s, AV_LOG_ERROR, "Referenced QT chapter track not found\n");
+ return;
+ }
+
+ st->discard = AVDISCARD_ALL;
+ sc = st->priv_data;
+ cur_pos = url_ftell(sc->pb);
+
+ for (i = 0; i < st->nb_index_entries; i++) {
+ AVIndexEntry *sample = &st->index_entries[i];
+ int64_t end = i+1 < st->nb_index_entries ? st->index_entries[i+1].timestamp : st->duration;
+
+ if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
+ av_log(s, AV_LOG_ERROR, "Chapter %d not found in file\n", i);
+ goto finish;
+ }
+
+ title = av_malloc(sample->size+2);
+ get_buffer(sc->pb, title, sample->size);
+
+ // the first two bytes are the length of the title
+ len = AV_RB16(title);
+ if (len > sample->size-2)
+ continue;
+
+ // The samples could theoretically be in any encoding if there's an encd
+ // atom following, but in practice are only utf-8 or utf-16, distinguished
+ // instead by the presence of a BOM
+ if (AV_RB16(title+2) == 0xfeff) {
+ uint8_t *utf8 = av_malloc(2*len+3);
+
+ i8 = i16 = 0;
+ while (i16 < len) {
+ uint32_t ch;
+ uint8_t tmp;
+ GET_UTF16(ch, i16 < len ? AV_RB16(title + (i16+=2)) : 0, break;)
+ PUT_UTF8(ch, tmp, if (i8 < 2*len) utf8[2+i8++] = tmp;)
+ }
+ utf8[2+i8] = 0;
+ av_freep(&title);
+ title = utf8;
+ }
+
+ ff_new_chapter(s, i, st->time_base, sample->timestamp, end, title+2);
+ av_freep(&title);
+ }
+finish:
+ av_free(title);
+ url_fseek(sc->pb, cur_pos, SEEK_SET);
+}
+
static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
MOVContext *mov = s->priv_data;
@@ -2280,6 +2355,9 @@ static int mov_read_header(AVFormatConte
}
dprintf(mov->fc, "on_parse_exit_offset=%lld\n", url_ftell(pb));
+ if (!url_is_streamed(pb) && mov->chapter_track > 0)
+ mov_read_chapters(s);
+
return 0;
}
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