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mad: handle libmad freeform parsing quirk

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This commit is contained in:
Mark Nauwelaerts 2012-02-21 18:53:57 +01:00
parent 5dead1c400
commit 838493c9a7
1 changed files with 16 additions and 0 deletions

16
ext/mad/gstmad.c
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@ -339,6 +339,22 @@ gst_mad_parse (GstAudioDecoder * dec, GstAdapter * adapter,
GST_LOG_OBJECT (mad, "decoding the header now");
if (mad_header_decode (&mad->frame.header, &mad->stream) == -1) {
/* HACK it seems mad reports wrong error when it is trying to determine
* free bitrate and scanning for next header */
if (mad->stream.error == MAD_ERROR_LOSTSYNC) {
const guint8 *ptr = mad->stream.this_frame;
guint32 header;
if (ptr >= data && ptr < data + av) {
header = GST_READ_UINT32_BE (ptr);
/* looks like possible freeform header with not much data */
if (((header & 0xFFE00000) == 0xFFE00000) &&
(((header >> 12) & 0xF) == 0x0) && (av < 4096)) {
GST_DEBUG_OBJECT (mad, "overriding freeform LOST_SYNC to BUFLEN");
mad->stream.error = MAD_ERROR_BUFLEN;
}
}
}
if (mad->stream.error == MAD_ERROR_BUFLEN) {
GST_LOG_OBJECT (mad,
"not enough data in tempbuffer (%d), breaking to get more", size);