mov: call mov_rewrite_dvd_sub_extradata() after parsing dimensions from tkhd

This also moves mov_rewrite_dvd_sub_extradata() to mov.c.

Sample-Id: NeroRecodeSample.mp4

1 files changed, 55 insertions, 0 deletions

diff --git a/libavformat/mov.c b/libavformat/mov.c
index 8fc096fba4..5d0719c057 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -1309,6 +1309,57 @@ static void mov_parse_stsd_subtitle(MOVContext *c, AVIOContext *pb,
     st->codec->height = sc->height;
 }
 
+static uint32_t yuv_to_rgba(uint32_t ycbcr)
+{
+    uint8_t r, g, b;
+    int y, cb, cr;
+
+    y  = (ycbcr >> 16) & 0xFF;
+    cr = (ycbcr >> 8)  & 0xFF;
+    cb =  ycbcr        & 0xFF;
+
+    b = av_clip_uint8(1.164 * (y - 16)                      + 2.018 * (cb - 128));
+    g = av_clip_uint8(1.164 * (y - 16) - 0.813 * (cr - 128) - 0.391 * (cb - 128));
+    r = av_clip_uint8(1.164 * (y - 16) + 1.596 * (cr - 128));
+
+    return (r << 16) | (g << 8) | b;
+}
+
+static int mov_rewrite_dvd_sub_extradata(AVStream *st)
+{
+    char buf[256] = {0};
+    uint8_t *src = st->codec->extradata;
+    int i;
+
+    if (st->codec->extradata_size != 64)
+        return 0;
+
+    if (st->codec->width > 0 &&  st->codec->height > 0)
+        snprintf(buf, sizeof(buf), "size: %dx%d\n",
+                 st->codec->width, st->codec->height);
+    av_strlcat(buf, "palette: ", sizeof(buf));
+
+    for (i = 0; i < 16; i++) {
+        uint32_t yuv = AV_RB32(src + i * 4);
+        uint32_t rgba = yuv_to_rgba(yuv);
+
+        av_strlcatf(buf, sizeof(buf), "%06x%s", rgba, i != 15 ? ", " : "");
+    }
+
+    if (av_strlcat(buf, "\n", sizeof(buf)) >= sizeof(buf))
+        return 0;
+
+    av_freep(&st->codec->extradata);
+    st->codec->extradata_size = 0;
+    st->codec->extradata = av_mallocz(strlen(buf) + FF_INPUT_BUFFER_PADDING_SIZE);
+    if (!st->codec->extradata)
+        return AVERROR(ENOMEM);
+    st->codec->extradata_size = strlen(buf);
+    memcpy(st->codec->extradata, buf, st->codec->extradata_size);
+
+    return 0;
+}
+
 static int mov_parse_stsd_data(MOVContext *c, AVIOContext *pb,
                                 AVStream *st, MOVStreamContext *sc,
                                 int size)
@@ -2891,6 +2942,10 @@ static int mov_read_header(AVFormatContext *s)
                 st->codec->width  = sc->width;
                 st->codec->height = sc->height;
             }
+            if (st->codec->codec_id == AV_CODEC_ID_DVD_SUBTITLE) {
+                if ((err = mov_rewrite_dvd_sub_extradata(st)) < 0)
+                    return err;
+            }
         }
     }