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xmv: Read the video packet data first, then swap its bytes 

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Sven Hesse 2011-08-18 19:23:52 +02:00 committed by Michael Niedermayer
parent c062aa8deb
commit 8ea6157d83
1 changed files with 6 additions and 6 deletions
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12
libavformat/xmv.c
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@ -450,7 +450,7 @@ static int xmv_fetch_video_packet(AVFormatContext *s,
int result;
uint32_t frame_header;
uint32_t frame_size, frame_timestamp;
uint32_t i;
uint8_t *data, *end;
/* Seek to it */
if (avio_seek(pb, video->data_offset, SEEK_SET) != video->data_offset)
@ -465,17 +465,17 @@ static int xmv_fetch_video_packet(AVFormatContext *s,
if ((frame_size + 4) > video->data_size)
return AVERROR(EIO);
/* Create the packet */
result = av_new_packet(pkt, frame_size);
if (result)
/* Get the packet data */
result = av_get_packet(pb, pkt, frame_size);
if (result != frame_size)
return result;
/* Contrary to normal WMV2 video, the bit stream in XMV's
* WMV2 is little-endian.
* TODO: This manual swap is of course suboptimal.
*/
for (i = 0; i < frame_size; i += 4)
AV_WB32(pkt->data + i, avio_rl32(pb));
for (data = pkt->data, end = pkt->data + frame_size; data < end; data += 4)
AV_WB32(data, AV_RL32(data));
pkt->stream_index = video->stream_index;