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Merge commit '23a211cbba0b7c9ee694040031b2e5da1be54a00'

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* commit '23a211cbba0b7c9ee694040031b2e5da1be54a00':
  lavc: change all decoders to behave consistently with AV_EF_CRCCHECK.

Conflicts:
	libavcodec/avcodec.h
	libavcodec/tta.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-10-28 12:34:35 +01:00
commit 84f972f994
6 changed files with 23 additions and 7 deletions
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2
libavcodec/ac3dec.c
View File

@ -1330,6 +1330,8 @@ static int ac3_decode_frame(AVCodecContext * avctx, void *data,
if (av_crc(av_crc_get_table(AV_CRC_16_ANSI), 0, &buf[2],
s->frame_size - 2)) {
av_log(avctx, AV_LOG_ERROR, "frame CRC mismatch\n");
if (avctx->err_recognition & AV_EF_EXPLODE)
return AVERROR_INVALIDDATA;
err = AAC_AC3_PARSE_ERROR_CRC;
}
}

2
libavcodec/alsdec.c
View File

@ -1565,6 +1565,8 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr,
if (ctx->cur_frame_length != sconf->frame_length &&
ctx->crc_org != ctx->crc) {
av_log(avctx, AV_LOG_ERROR, "CRC error.\n");
if (avctx->err_recognition & AV_EF_EXPLODE)
return AVERROR_INVALIDDATA;
}
}

9
libavcodec/avcodec.h
View File

@ -2474,7 +2474,14 @@ typedef struct AVCodecContext {
* - decoding: Set by user.
*/
int err_recognition;
#define AV_EF_CRCCHECK (1<<0) ///< verify embedded CRCs
/**
* Verify checksums embedded in the bitstream (could be of either encoded or
* decoded data, depending on the codec) and print an error message on mismatch.
* If AV_EF_EXPLODE is also set, a mismatching checksum will result in the
* decoder returning an error.
*/
#define AV_EF_CRCCHECK (1<<0)
#define AV_EF_BITSTREAM (1<<1) ///< detect bitstream specification deviations
#define AV_EF_BUFFER (1<<2) ///< detect improper bitstream length
#define AV_EF_EXPLODE (1<<3) ///< abort decoding on minor error detection

6
libavcodec/takdec.c
View File

@ -690,7 +690,8 @@ static int tak_decode_frame(AVCodecContext *avctx, void *data,
hsize = get_bits_count(gb) / 8;
if (ff_tak_check_crc(pkt->data, hsize)) {
av_log(avctx, AV_LOG_ERROR, "CRC error\n");
return AVERROR_INVALIDDATA;
if (avctx->err_recognition & AV_EF_EXPLODE)
return AVERROR_INVALIDDATA;
}
}
@ -865,7 +866,8 @@ static int tak_decode_frame(AVCodecContext *avctx, void *data,
if (ff_tak_check_crc(pkt->data + hsize,
get_bits_count(gb) / 8 - hsize)) {
av_log(avctx, AV_LOG_ERROR, "CRC error\n");
return AVERROR_INVALIDDATA;
if (avctx->err_recognition & AV_EF_EXPLODE)
return AVERROR_INVALIDDATA;
}
}

3
libavcodec/tta.c
View File

@ -251,7 +251,8 @@ static int tta_decode_frame(AVCodecContext *avctx, void *data,
int32_t *p;
if (avctx->err_recognition & AV_EF_CRCCHECK) {
if (buf_size < 4 || tta_check_crc(s, buf, buf_size - 4))
if (buf_size < 4 ||
(tta_check_crc(s, buf, buf_size - 4) && avctx->err_recognition & AV_EF_EXPLODE))
return AVERROR_INVALIDDATA;
}

8
libavcodec/wavpack.c
View File

@ -548,9 +548,11 @@ static inline int wv_unpack_mono(WavpackFrameContext *s, GetBitContext *gb,
} while (!last && count < s->samples);
wv_reset_saved_context(s);
if ((s->avctx->err_recognition & AV_EF_CRCCHECK) &&
wv_check_crc(s, crc, crc_extra_bits))
return AVERROR_INVALIDDATA;
if (s->avctx->err_recognition & AV_EF_CRCCHECK) {
int ret = wv_check_crc(s, crc, crc_extra_bits);
if (ret < 0 && s->avctx->err_recognition & AV_EF_EXPLODE)
return ret;
}
return 0;
}