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typefind: Fix mp3 typefinding with multiple different headers

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(yes, this has never worked since it was introduced, don't worry)

If we want to actually detect layer/channels/samplerate changes,
it would be better to:
* not reset the various prev_* variables at every iteration.
* and actually store the values when they change

CID #206079
CID #206080
CID #206081
This commit is contained in:
Edward Hervey 2018-01-03 15:31:04 +01:00 committed by Edward Hervey
parent 7cc1431a56
commit 384d27002c
1 changed files with 6 additions and 5 deletions
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11
gst/typefind/gsttypefindfunctions.c
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@ -1443,12 +1443,12 @@ mp3_type_find_at_offset (GstTypeFind * tf, guint64 start_off,
guint found = 0; /* number of valid headers found */
guint64 offset = skipped;
gboolean changed = FALSE;
guint prev_layer = 0;
guint prev_channels = 0, prev_samplerate = 0;
while (found < GST_MP3_TYPEFIND_TRY_HEADERS) {
guint32 head;
guint length;
guint prev_layer = 0;
guint prev_channels = 0, prev_samplerate = 0;
gboolean free = FALSE;
if ((gint64) (offset - skipped + 4) >= 0 &&
@ -1495,15 +1495,16 @@ mp3_type_find_at_offset (GstTypeFind * tf, guint64 start_off,
* this header*/
if (prev_layer)
changed = TRUE;
prev_layer = layer;
prev_channels = channels;
prev_samplerate = samplerate;
} else {
found++;
GST_LOG ("found %d. header at offset %" G_GUINT64_FORMAT " (0x%"
G_GINT64_MODIFIER "X)", found, start_off + offset,
start_off + offset);
}
prev_layer = layer;
prev_channels = channels;
prev_samplerate = samplerate;
offset += length;
}
g_assert (found <= GST_MP3_TYPEFIND_TRY_HEADERS);