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avformat/riffenc: Filter out "BottomUp" in ff_put_bmp_header()

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Fixes Ticket1304

Commit message and extradata size bugfix by commiter
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 6843b9dc78)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Benoit Fouet 2014-09-23 10:07:10 +02:00 committed by Michael Niedermayer
parent 77367f2728
commit dc319a52f9
1 changed files with 8 additions and 4 deletions
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12
libavformat/riffenc.c
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@ -203,11 +203,15 @@ int ff_put_wav_header(AVIOContext *pb, AVCodecContext *enc)
void ff_put_bmp_header(AVIOContext *pb, AVCodecContext *enc,
const AVCodecTag *tags, int for_asf, int ignore_extradata)
{
int keep_height = enc->extradata_size >= 9 &&
!memcmp(enc->extradata + enc->extradata_size - 9, "BottomUp", 9);
int extradata_size = enc->extradata_size - 9*keep_height;
/* size */
avio_wl32(pb, 40 + (ignore_extradata ? 0 : enc->extradata_size));
avio_wl32(pb, 40 + (ignore_extradata ? 0 :extradata_size));
avio_wl32(pb, enc->width);
//We always store RGB TopDown
avio_wl32(pb, enc->codec_tag ? enc->height : -enc->height);
avio_wl32(pb, enc->codec_tag || keep_height ? enc->height : -enc->height);
/* planes */
avio_wl16(pb, 1);
/* depth */
@ -221,9 +225,9 @@ void ff_put_bmp_header(AVIOContext *pb, AVCodecContext *enc,
avio_wl32(pb, 0);
if (!ignore_extradata) {
avio_write(pb, enc->extradata, enc->extradata_size);
avio_write(pb, enc->extradata, extradata_size);
if (!for_asf && enc->extradata_size & 1)
if (!for_asf && extradata_size & 1)
avio_w8(pb, 0);
}
}