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fix probing and demuxing of pond.dv, issue #887

Originally committed as revision 19197 to svn://svn.ffmpeg.org/ffmpeg/trunk

Baptiste Coudurier authored on 2009/06/15 10:41:59
Showing 1 changed files
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@@ -400,7 +400,7 @@ typedef struct RawDVContext {
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 static int dv_read_header(AVFormatContext *s,
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                           AVFormatParameters *ap)
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 {
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-    unsigned state;
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+    unsigned state, marker_pos = 0;
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     RawDVContext *c = s->priv_data;
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     c->dv_demux = dv_init_demux(s);
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@@ -413,6 +413,13 @@ static int dv_read_header(AVFormatContext *s,
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             av_log(s, AV_LOG_ERROR, "Cannot find DV header.\n");
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             return -1;
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         }
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+        if (state == 0x003f0700 || state == 0xff3f0700)
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+            marker_pos = url_ftell(s->pb);
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+        if (state == 0xff3f0701 && url_ftell(s->pb) - marker_pos == 80) {
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+            url_fseek(s->pb, -163, SEEK_CUR);
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+            state = get_be32(s->pb);
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+            break;
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+        }
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         state = (state << 8) | get_byte(s->pb);
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     }
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     AV_WB32(c->buf, state);
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@@ -476,7 +483,7 @@ static int dv_read_close(AVFormatContext *s)
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 static int dv_probe(AVProbeData *p)
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 {
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-    unsigned state;
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+    unsigned state, marker_pos = 0;
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     int i;
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     if (p->buf_size < 5)
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@@ -486,6 +493,10 @@ static int dv_probe(AVProbeData *p)
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     for (i = 4; i < p->buf_size; i++) {
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         if ((state & 0xffffff7f) == 0x1f07003f)
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             return AVPROBE_SCORE_MAX*3/4; // not max to avoid dv in mov to match
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+        if (state == 0x003f0700 || state == 0xff3f0700)
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+            marker_pos = i;
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+        if (state == 0xff3f0701 && i - marker_pos == 80)
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+            return AVPROBE_SCORE_MAX/4;
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         state = (state << 8) | p->buf[i];
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     }
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