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Implement DELTA_FLI opcodes correctly. Patch by Steven Johnson

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Originally committed as revision 7165 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Steven Johnson 2006-11-24 00:16:32 +00:00 committed by Alex Beregszaszi
parent 37e6f5f321
commit fce2200da0
1 changed files with 7 additions and 1 deletions
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8
libavcodec/flicvideo.c
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@ -246,9 +246,15 @@ static int flic_decode_frame_8BPP(AVCodecContext *avctx,
while (compressed_lines > 0) {
line_packets = LE_16(&buf[stream_ptr]);
stream_ptr += 2;
if (line_packets < 0) {
if ((line_packets & 0xC000) == 0xC000) {
// line skip opcode
line_packets = -line_packets;
y_ptr += line_packets * s->frame.linesize[0];
} else if ((line_packets & 0xC000) == 0x4000) {
av_log(avctx, AV_LOG_ERROR, "Undefined opcode (%x) in DELTA_FLI\n", line_packets);
} else if ((line_packets & 0xC000) == 0x8000) {
// "last byte" opcode
pixels[y_ptr + s->frame.linesize[0] - 1] = line_packets & 0xff;
} else {
compressed_lines--;
pixel_ptr = y_ptr;