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dfa: implement missing TDLT coding method

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This commit is contained in:
Kostya Shishkov 2013-04-08 20:06:42 +02:00
parent fc792308c5
commit 56c1b92576
1 changed files with 21 additions and 4 deletions
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25
libavcodec/dfa.c
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@ -284,9 +284,26 @@ static int decode_wdlt(GetByteContext *gb, uint8_t *frame, int width, int height
return 0;
}
static int decode_unk6(GetByteContext *gb, uint8_t *frame, int width, int height)
static int decode_tdlt(GetByteContext *gb, uint8_t *frame, int width, int height)
{
return AVERROR_PATCHWELCOME;
const uint8_t *frame_end = frame + width * height;
int segments = bytestream2_get_le32(gb);
int skip, copy;
while (segments--) {
if (bytestream2_get_bytes_left(gb) < 2)
return AVERROR_INVALIDDATA;
copy = bytestream2_get_byteu(gb) * 2;
skip = bytestream2_get_byteu(gb) * 2;
if (frame_end - frame < copy + skip ||
bytestream2_get_bytes_left(gb) < copy)
return AVERROR_INVALIDDATA;
frame += skip;
bytestream2_get_buffer(gb, frame, copy);
frame += copy;
}
return 0;
}
static int decode_blck(GetByteContext *gb, uint8_t *frame, int width, int height)
@ -300,11 +317,11 @@ typedef int (*chunk_decoder)(GetByteContext *gb, uint8_t *frame, int width, int
static const chunk_decoder decoder[8] = {
decode_copy, decode_tsw1, decode_bdlt, decode_wdlt,
decode_unk6, decode_dsw1, decode_blck, decode_dds1,
decode_tdlt, decode_dsw1, decode_blck, decode_dds1,
};
static const char* chunk_name[8] = {
"COPY", "TSW1", "BDLT", "WDLT", "????", "DSW1", "BLCK", "DDS1"
"COPY", "TSW1", "BDLT", "WDLT", "TDLT", "DSW1", "BLCK", "DDS1"
};
static int dfa_decode_frame(AVCodecContext *avctx,