[FFmpeg-devel] [PATCH 2/2] alsdec: update checked AV_EF flags.
Michael Niedermayer
michaelni at gmx.at
Sat Nov 19 21:23:32 CET 2011
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 at gmx.at>
---
libavcodec/alsdec.c | 6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/libavcodec/alsdec.c b/libavcodec/alsdec.c
index d105526..fdcbd3f 100644
--- a/libavcodec/alsdec.c
+++ b/libavcodec/alsdec.c
@@ -393,7 +393,7 @@ static av_cold int read_specific_config(ALSDecContext *ctx)
if (get_bits_left(&gb) < 32)
return -1;
- if (avctx->err_recognition & AV_EF_CRCCHECK) {
+ if (avctx->err_recognition & (AV_EF_CRCCHECK|AV_EF_CAREFUL)) {
ctx->crc_table = av_crc_get_table(AV_CRC_32_IEEE_LE);
ctx->crc = 0xFFFFFFFF;
ctx->crc_org = ~get_bits_long(&gb, 32);
@@ -1476,7 +1476,7 @@ static int decode_frame(AVCodecContext *avctx,
}
// update CRC
- if (sconf->crc_enabled && (avctx->err_recognition & AV_EF_CRCCHECK)) {
+ if (sconf->crc_enabled && (avctx->err_recognition & (AV_EF_CRCCHECK|AV_EF_CAREFUL))) {
int swap = HAVE_BIGENDIAN != sconf->msb_first;
if (ctx->avctx->bits_per_raw_sample == 24) {
@@ -1710,7 +1710,7 @@ static av_cold int decode_init(AVCodecContext *avctx)
// allocate crc buffer
if (HAVE_BIGENDIAN != sconf->msb_first && sconf->crc_enabled &&
- (avctx->err_recognition & AV_EF_CRCCHECK)) {
+ (avctx->err_recognition & (AV_EF_CRCCHECK|AV_EF_CAREFUL))) {
ctx->crc_buffer = av_malloc(sizeof(*ctx->crc_buffer) *
ctx->cur_frame_length *
avctx->channels *
--
1.7.4.1
More information about the ffmpeg-devel
mailing list