mov: Use defines for trun flags

Signed-off-by: Martin Storsjö <martin@martin.st>

libavformat/isom.h

@@ -164,6 +164,13 @@ void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id);
 #define MOV_TFHD_DEFAULT_FLAGS          0x20
 #define MOV_TFHD_DURATION_IS_EMPTY  0x010000
 
+#define MOV_TRUN_DATA_OFFSET            0x01
+#define MOV_TRUN_FIRST_SAMPLE_FLAGS     0x04
+#define MOV_TRUN_SAMPLE_DURATION       0x100
+#define MOV_TRUN_SAMPLE_SIZE           0x200
+#define MOV_TRUN_SAMPLE_FLAGS          0x400
+#define MOV_TRUN_SAMPLE_CTS            0x800
+
 int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb, MOVAtom atom);
 enum CodecID ff_mov_get_lpcm_codec_id(int bps, int flags);
 

libavformat/mov.c

@@ -2262,8 +2262,8 @@ static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
         return AVERROR(ENOMEM);
     sc->ctts_data = ctts_data;
 
-    if (flags & 0x001) data_offset        = avio_rb32(pb);
-    if (flags & 0x004) first_sample_flags = avio_rb32(pb);
+    if (flags & MOV_TRUN_DATA_OFFSET)        data_offset        = avio_rb32(pb);
+    if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS) first_sample_flags = avio_rb32(pb);
     dts    = sc->track_end - sc->time_offset;
     offset = frag->base_data_offset + data_offset;
     distance = 0;
@@ -2274,14 +2274,15 @@ static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
         unsigned sample_duration = frag->duration;
         int keyframe;
 
-        if (flags & 0x100) sample_duration = avio_rb32(pb);
-        if (flags & 0x200) sample_size     = avio_rb32(pb);
-        if (flags & 0x400) sample_flags    = avio_rb32(pb);
+        if (flags & MOV_TRUN_SAMPLE_DURATION) sample_duration = avio_rb32(pb);
+        if (flags & MOV_TRUN_SAMPLE_SIZE)     sample_size     = avio_rb32(pb);
+        if (flags & MOV_TRUN_SAMPLE_FLAGS)    sample_flags    = avio_rb32(pb);
         sc->ctts_data[sc->ctts_count].count = 1;
-        sc->ctts_data[sc->ctts_count].duration = (flags & 0x800) ? avio_rb32(pb) : 0;
+        sc->ctts_data[sc->ctts_count].duration = (flags & MOV_TRUN_SAMPLE_CTS) ?
+                                                  avio_rb32(pb) : 0;
         sc->ctts_count++;
         if ((keyframe = st->codec->codec_type == AVMEDIA_TYPE_AUDIO ||
-             (flags & 0x004 && !i && !(sample_flags & 0xffff0000)) || sample_flags & 0x2000000))
+             (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS && !i && !(sample_flags & 0xffff0000)) || sample_flags & 0x2000000))
             distance = 0;
         av_add_index_entry(st, offset, dts, sample_size, distance,
                            keyframe ? AVINDEX_KEYFRAME : 0);

libavformat/movenc.c

@@ -2229,7 +2229,7 @@ static uint32_t get_sample_flags(MOVTrack *track, MOVIentry *entry)
 static int mov_write_trun_tag(AVIOContext *pb, MOVTrack *track)
 {
     int64_t pos = avio_tell(pb);
-    uint32_t flags = 1; /* data-offset-present */
+    uint32_t flags = MOV_TRUN_DATA_OFFSET;
     int i;
 
     for (i = 0; i < track->entry; i++) {
@@ -2237,16 +2237,16 @@ static int mov_write_trun_tag(AVIOContext *pb, MOVTrack *track)
             track->track_duration - track->cluster[i].dts + track->start_dts :
             track->cluster[i + 1].dts - track->cluster[i].dts;
         if (duration != track->default_duration)
-            flags |= 0x100; /* sample-duration-present */
+            flags |= MOV_TRUN_SAMPLE_DURATION;
         if (track->cluster[i].size != track->default_size)
-            flags |= 0x200; /* sample-size-present */
+            flags |= MOV_TRUN_SAMPLE_SIZE;
         if (i > 0 && get_sample_flags(track, &track->cluster[i]) != track->default_sample_flags)
-            flags |= 0x400; /* sample-flags-present */
+            flags |= MOV_TRUN_SAMPLE_FLAGS;
     }
-    if (!(flags & 0x400))
-        flags |= 0x4; /* first-sample-flags-present */
+    if (!(flags & MOV_TRUN_SAMPLE_FLAGS))
+        flags |= MOV_TRUN_FIRST_SAMPLE_FLAGS;
     if (track->flags & MOV_TRACK_CTTS)
-        flags |= 0x800; /* sample-composition-time-offsets-present */
+        flags |= MOV_TRUN_SAMPLE_CTS;
 
     avio_wb32(pb, 0); /* size placeholder */
     ffio_wfourcc(pb, "trun");
@@ -2256,20 +2256,20 @@ static int mov_write_trun_tag(AVIOContext *pb, MOVTrack *track)
     avio_wb32(pb, track->entry); /* sample count */
     track->moof_size_offset = avio_tell(pb);
     avio_wb32(pb, 0); /* data offset */
-    if (flags & 0x4) /* first sample flags */
+    if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS)
         avio_wb32(pb, get_sample_flags(track, &track->cluster[0]));
 
     for (i = 0; i < track->entry; i++) {
         int64_t duration = i + 1 == track->entry ?
             track->track_duration - track->cluster[i].dts + track->start_dts :
             track->cluster[i + 1].dts - track->cluster[i].dts;
-        if (flags & 0x100)
+        if (flags & MOV_TRUN_SAMPLE_DURATION)
             avio_wb32(pb, duration);
-        if (flags & 0x200)
+        if (flags & MOV_TRUN_SAMPLE_SIZE)
             avio_wb32(pb, track->cluster[i].size);
-        if (flags & 0x400)
+        if (flags & MOV_TRUN_SAMPLE_FLAGS)
             avio_wb32(pb, get_sample_flags(track, &track->cluster[i]));
-        if (flags & 0x800)
+        if (flags & MOV_TRUN_SAMPLE_CTS)
             avio_wb32(pb, track->cluster[i].cts);
     }