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Code Issues Releases Activity

Drop code that attempts to decode frames that are prefixed by junk.

Browse Source 
Too often it ends up decoding random data into noise without detecting
it (for example after seeking of some MP3 data with oddly often occurring
startcode emulation).
Fixes issue1154.

Originally committed as revision 19302 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2009-06-30 03:57:27 +00:00
parent f3ac96e4d8
commit 822d0a6e0c
1 changed files with 3 additions and 8 deletions

11
libavcodec/mpegaudiodec.c

@ -2255,20 +2255,15 @@ static int decode_frame(AVCodecContext * avctx,
MPADecodeContext *s = avctx->priv_data;
uint32_t header;
int out_size;
int skipped = 0;
OUT_INT *out_samples = data;
retry:
if(buf_size < HEADER_SIZE)
return -1;
header = AV_RB32(buf);
if(ff_mpa_check_header(header) < 0){
buf++;
buf_size--;
skipped++;
av_log(avctx, AV_LOG_ERROR, "Header missing skipping one byte.\n");
goto retry;
av_log(avctx, AV_LOG_ERROR, "Header missing\n");
return -1;
}
if (ff_mpegaudio_decode_header((MPADecodeHeader *)s, header) == 1) {
@ -2297,7 +2292,7 @@ retry:
}else
av_log(avctx, AV_LOG_DEBUG, "Error while decoding MPEG audio frame.\n"); //FIXME return -1 / but also return the number of bytes consumed
s->frame_size = 0;
return buf_size + skipped;
return buf_size;
}
static void flush(AVCodecContext *avctx){