32 #define BITSTREAM_READER_LE
37 #define EA_PREAMBLE_SIZE 8
38 #define kVGT_TAG MKTAG('k', 'V', 'G', 'T')
65 static int unpack(
const uint8_t *src,
const uint8_t *src_end,
unsigned char *dst,
int width,
int height) {
66 unsigned char *dst_end = dst + width*
height;
68 unsigned char *dst_start = dst;
80 while(size>0 && src<src_end) {
84 if ( src[0] & 0x80 ) {
86 if ( src[0] & 0x20 ) {
88 size1 = (((src[0] & 31) + 1) << 2);
92 offset = ((src[0] & 0x10) << 12) +
AV_RB16(&src[1]) + 1;
93 size2 = ((src[0] & 0xC) << 6) + src[3] + 5;
97 size1 = ( ( src[1] & 0xC0) >> 6 );
98 offset = (
AV_RB16(&src[1]) & 0x3FFF) + 1;
99 size2 = (src[0] & 0x3F) + 4;
103 offset = ((src[0] & 0x60) << 3) + src[1] + 1;
104 size2 = ((src[0] & 0x1C) >> 2) + 3;
110 if (size1>src_end-src)
115 run =
FFMIN(size1, dst_end-dst);
116 memcpy(dst, src, run);
122 if (dst-dst_start<offset)
125 run =
FFMIN(size2, dst_end-dst);
142 int num_blocks_packed;
147 const unsigned char *blocks_raw;
153 num_blocks_raw =
AV_RL16(&buf[2]);
154 num_blocks_packed =
AV_RL16(&buf[4]);
155 vector_bits =
AV_RL16(&buf[6]);
170 mvbits = (num_mvs*2*10+31) & ~31;
172 if (buf+(mvbits>>3)+16*num_blocks_raw+8*num_blocks_packed>buf_end)
184 buf += num_blocks_raw*16;
188 for (i=0; i<num_blocks_packed; i++) {
203 unsigned int vector =
get_bits(&gb, vector_bits);
204 const unsigned char *src;
207 if (vector < num_mvs) {
212 if (src+3*src_stride+3>=frame0_end)
216 if (offset<num_blocks_raw)
217 src = blocks_raw + 16*offset;
218 else if (offset-num_blocks_raw<num_blocks_packed)
228 src[j*src_stride + i];
244 void *
data,
int *data_size,
247 const uint8_t *buf = avpkt->
data;
248 int buf_size = avpkt->
size;
250 const uint8_t *buf_end = buf + buf_size;