23 #define BITSTREAM_READER_LE
39 if (src_size < avctx->
width * avctx->
height * 3 / 2) {
52 for (h = 0; h < avctx->
height; h += 2) {
53 for (w = 0; w < avctx->
width; w += 2) {
56 U[w >> 1] = src[4] + 0x80;
57 V[w >> 1] = src[5] + 0x80;
69 const uint8_t def_lru[8] = { 0x00, 0x20, 0x40, 0x60, 0x80, 0xA0, 0xC0, 0xFF };
78 memmove(lru + 1, lru,
sizeof(*lru) * (8 - 1));
81 memmove(lru + 1, lru,
sizeof(*lru) * (c - 1));
90 int ystride,
int ustride,
int vstride)
95 for (i = 0; i < 3; i++)
98 for (y = 0; y <
height; y+=2) {
99 for (x = 0; x <
width; x += 2) {
100 Y[x + 0 + 0 * ystride] =
decode_sym(gb, lru[0]);
101 Y[x + 1 + 0 * ystride] =
decode_sym(gb, lru[0]);
102 Y[x + 0 + 1 * ystride] =
decode_sym(gb, lru[0]);
103 Y[x + 1 + 1 * ystride] =
decode_sym(gb, lru[0]);
121 int nslices, slice, slice_height;
122 uint32_t
off, slice_size;
127 nslices = bytestream2_get_le16(&gb);
128 off =
FFALIGN(nslices * 4 + 2, 16);
129 if (src_size < off) {
134 if (!nslices || avctx->
height % nslices) {
140 slice_height = avctx->
height / nslices;
141 if ((avctx->
width & 1) || (slice_height & 1)) {
143 avctx->
width, slice_height);
154 for (slice = 0; slice < nslices; slice++) {
155 slice_size = bytestream2_get_le32(&gb);
156 if (slice_size > src_size - off) {
158 "invalid slice size %d (only %d bytes left)\n",
159 slice_size, src_size - off);
162 if (slice_size <= 16) {
167 if (
AV_RL32(src + off) != slice_size - 16) {
169 "Slice sizes mismatch: got %d instead of %d\n",
170 AV_RL32(src + off), slice_size - 16);
176 Y += pic->
linesize[0] * slice_height;
177 U += pic->
linesize[1] * (slice_height >> 1);
178 V += pic->
linesize[2] * (slice_height >> 1);
192 if (avpkt->
size < 16) {