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authorRamiro Polla <ramiro.polla@gmail.com>2009-03-30 03:34:15 +0000
committerRamiro Polla <ramiro.polla@gmail.com>2009-03-30 03:34:15 +0000
commit7b18e13a7c158a1bf50bcbeb363ecb0fe38cd5be (patch)
tree3c728a83366026df8cc1a7e19151398909de7946 /libavcodec/mlpdec.c
parent125cf771f6d17b9b9db7588cbf8f36619bc41f35 (diff)
mlpdec: Cleaner and better termination word check.
Originally committed as revision 18236 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/mlpdec.c')
-rw-r--r--libavcodec/mlpdec.c23
1 files changed, 12 insertions, 11 deletions
diff --git a/libavcodec/mlpdec.c b/libavcodec/mlpdec.c
index ff725e43d9..3be27b40f8 100644
--- a/libavcodec/mlpdec.c
+++ b/libavcodec/mlpdec.c
@@ -1021,19 +1021,20 @@ static int read_access_unit(AVCodecContext *avctx, void* data, int *data_size,
&& get_bits1(&gb) == 0);
skip_bits(&gb, (-get_bits_count(&gb)) & 15);
- if (substream_data_len[substr] * 8 - get_bits_count(&gb) >= 32 &&
- (show_bits_long(&gb, 32) == END_OF_STREAM ||
- show_bits_long(&gb, 20) == 0xd234e)) {
- skip_bits(&gb, 18);
+ if (substream_data_len[substr] * 8 - get_bits_count(&gb) >= 32) {
+ int shorten_by;
+
+ if (get_bits(&gb, 16) != 0xD234)
+ return -1;
+
+ shorten_by = get_bits(&gb, 16);
+ if (m->avctx->codec_id == CODEC_ID_TRUEHD && shorten_by & 0x2000)
+ s->blockpos -= FFMIN(shorten_by & 0x1FFF, s->blockpos);
+ else if (m->avctx->codec_id == CODEC_ID_MLP && shorten_by != 0xD234)
+ return -1;
+
if (substr == m->max_decoded_substream)
av_log(m->avctx, AV_LOG_INFO, "End of stream indicated.\n");
-
- if (get_bits1(&gb)) {
- int shorten_by = get_bits(&gb, 13);
- shorten_by = FFMIN(shorten_by, s->blockpos);
- s->blockpos -= shorten_by;
- } else
- skip_bits(&gb, 13);
}
if (substream_data_len[substr] * 8 - get_bits_count(&gb) >= 16 &&
substream_parity_present[substr]) {