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tta: remove pointless code

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Checking seek table crc in decoder is pointless, as seek table is not used in
decoder anyway, so also stop storing seek table into extradata.
This commit is contained in:
Paul B Mahol 2013-05-30 19:57:47 +00:00
parent 2886e8065e
commit c4e0e31424
3 changed files with 13 additions and 28 deletions
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15
libavcodec/tta.c
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@ -203,8 +203,8 @@ static av_cold int tta_decode_init(AVCodecContext * avctx)
s->avctx = avctx;
// 30bytes includes a seektable with one frame
if (avctx->extradata_size < 30)
// 30bytes includes TTA1 header
if (avctx->extradata_size < 22)
return AVERROR_INVALIDDATA;
init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
@ -278,17 +278,6 @@ static av_cold int tta_decode_init(AVCodecContext * avctx)
av_log(avctx, AV_LOG_DEBUG, "data_length: %d frame_length: %d last: %d total: %d\n",
s->data_length, s->frame_length, s->last_frame_length, total_frames);
// FIXME: seek table
if (avctx->extradata_size <= 26 || total_frames > INT_MAX / 4 ||
avctx->extradata_size - 26 < total_frames * 4)
av_log(avctx, AV_LOG_WARNING, "Seek table missing or too small\n");
else if (avctx->err_recognition & AV_EF_CRCCHECK) {
if (tta_check_crc(s, avctx->extradata + 22, total_frames * 4))
return AVERROR_INVALIDDATA;
}
skip_bits_long(&s->gb, 32 * total_frames);
skip_bits_long(&s->gb, 32); // CRC32 of seektable
if(s->frame_length >= UINT_MAX / (s->channels * sizeof(int32_t))){
av_log(avctx, AV_LOG_ERROR, "frame_length too large\n");
return AVERROR_INVALIDDATA;

24
libavformat/tta.c
View File

@ -96,6 +96,16 @@ static int tta_read_header(AVFormatContext *s)
framepos = avio_tell(s->pb) + 4*c->totalframes + 4;
st->codec->extradata_size = avio_tell(s->pb) - start_offset;
st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
if (!st->codec->extradata) {
st->codec->extradata_size = 0;
return AVERROR(ENOMEM);
}
avio_seek(s->pb, start_offset, SEEK_SET);
avio_read(s->pb, st->codec->extradata, st->codec->extradata_size);
for (i = 0; i < c->totalframes; i++) {
uint32_t size = avio_rl32(s->pb);
av_add_index_entry(st, framepos, i * c->frame_size, size, 0,
@ -110,20 +120,6 @@ static int tta_read_header(AVFormatContext *s)
st->codec->sample_rate = samplerate;
st->codec->bits_per_coded_sample = bps;
st->codec->extradata_size = avio_tell(s->pb) - start_offset;
if(st->codec->extradata_size+FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)st->codec->extradata_size){
//this check is redundant as avio_read should fail
av_log(s, AV_LOG_ERROR, "extradata_size too large\n");
return -1;
}
st->codec->extradata = av_mallocz(st->codec->extradata_size+FF_INPUT_BUFFER_PADDING_SIZE);
if (!st->codec->extradata) {
st->codec->extradata_size = 0;
return AVERROR(ENOMEM);
}
avio_seek(s->pb, start_offset, SEEK_SET);
avio_read(s->pb, st->codec->extradata, st->codec->extradata_size);
return 0;
}

2
libavformat/version.h
View File

@ -31,7 +31,7 @@
#define LIBAVFORMAT_VERSION_MAJOR 55
#define LIBAVFORMAT_VERSION_MINOR 8
#define LIBAVFORMAT_VERSION_MICRO 100
#define LIBAVFORMAT_VERSION_MICRO 101
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
LIBAVFORMAT_VERSION_MINOR, \