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ac3dec: update checked AV_EF flags.

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A user who wishes to use default error concealment cannot set the
AV_EF_CRCCHECK flag because not every CRC in every format is a
reliable indicator of bitstream damage. In some formats crcrs
can be nonsensical in absence of any damage. We thus add the
AV_EF_CAREFUL flag in addition to the AV_EF_CRCCHECK flag to
allow a user to enable this reliable CRC check without having to
enable all CRC checks in all formats.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit eda3758c87)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer
2011-11-19 20:37:42 +01:00
parent 866d5c958f
commit 388e3e7853
1 changed files with 1 additions and 1 deletions
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2
libavcodec/ac3dec.c
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@@ -1371,7 +1371,7 @@ static int ac3_decode_frame(AVCodecContext * avctx, void *data,
if (s->frame_size > buf_size) { if (s->frame_size > buf_size) {
av_log(avctx, AV_LOG_ERROR, "incomplete frame\n"); av_log(avctx, AV_LOG_ERROR, "incomplete frame\n");
err = AAC_AC3_PARSE_ERROR_FRAME_SIZE; err = AAC_AC3_PARSE_ERROR_FRAME_SIZE;
} else if (avctx->err_recognition & AV_EF_CRCCHECK) { } else if (avctx->err_recognition & (AV_EF_CRCCHECK|AV_EF_CAREFUL)) {
/* check for crc mismatch */ /* check for crc mismatch */
if (av_crc(av_crc_get_table(AV_CRC_16_ANSI), 0, &buf[2], if (av_crc(av_crc_get_table(AV_CRC_16_ANSI), 0, &buf[2],
s->frame_size - 2)) { s->frame_size - 2)) {