26 #define BITSTREAM_READER_LE
49 if (avctx->
width & 1) {
68 uint8_t *dst,
const int dst_size)
73 const uint8_t *dst_end = dst + dst_size;
77 tree_size = bytestream2_get_byte(&s->
gb);
78 eof = bytestream2_get_byte(&s->
gb);
79 tree_root = eof + tree_size;
83 bits = bytestream2_get_byte(&s->
gb);
86 int bit = !!(bits &
mask);
89 node = bytestream2_get_byte(&tree);
101 bits = bytestream2_get_byteu(&s->
gb);
110 uint8_t *dest,
const int dest_len)
114 uint8_t *orig_dest = dest;
115 const uint8_t *dest_end = dest + dest_len;
117 while (dest < dest_end) {
121 opcode = bytestream2_get_byteu(&s->
gb);
125 if ((opcode & 0x80) == 0) {
127 back = ((opcode & 0x60) << 3) + bytestream2_get_byte(&s->
gb) + 1;
128 size2 = ((opcode & 0x1c) >> 2) + 3;
129 }
else if ((opcode & 0x40) == 0) {
130 size = bytestream2_peek_byte(&s->
gb) >> 6;
131 back = (bytestream2_get_be16(&s->
gb) & 0x3fff) + 1;
132 size2 = (opcode & 0x3f) + 4;
135 back = ((opcode & 0x10) << 12) + bytestream2_get_be16(&s->
gb) + 1;
136 size2 = ((opcode & 0x0c) << 6) + bytestream2_get_byte(&s->
gb) + 5;
137 if (size + size2 > dest_end - dest)
140 if (dest + size + size2 > dest_end ||
141 dest - orig_dest + size < back)
148 int finish = opcode >= 0xfc;
150 size = finish ? opcode & 3 : ((opcode & 0x1f) << 2) + 4;
151 if (dest_end - dest < size)
159 return dest - orig_dest;
168 const uint8_t *src, *src_end;
169 const uint8_t *table;
170 int mode, offset, dec_size, table_size;
179 mode = bytestream2_get_le16(&s->
gb);
181 table_size = bytestream2_get_le16(&s->
gb);
182 offset = table_size * 2;
201 src_end = src + dec_size;
203 for (j = 0; j < avctx->
height >> 1; j++) {
204 for (i = 0; i < avctx->
width >> 1; i++) {
206 if (val && val < table_size) {
207 val =
AV_RL16(table + (val << 1));
208 uval = (val >> 3) & 0xF8;
209 vval = (val >> 8) & 0xF8;
210 U[i] = uval | (uval >> 5);
211 V[i] = vval | (vval >> 5);
223 for (j = 0; j < avctx->
height >> 2; j++) {
224 for (i = 0; i < avctx->
width >> 1; i += 2) {
226 if (val && val < table_size) {
227 val =
AV_RL16(table + (val << 1));
228 uval = (val >> 3) & 0xF8;
229 vval = (val >> 8) & 0xF8;
230 U[i] = U[i+1] = U2[i] = U2[i+1] = uval | (uval >> 5);
231 V[i] = V[i+1] = V2[i] = V2[i+1] = vval | (vval >> 5);
248 unsigned chroma_off, corr_off;
253 chroma_off = bytestream2_get_le32(&s->
gb);
254 corr_off = bytestream2_get_le32(&s->
gb);
273 for (j = 1; j < avctx->
width - 1; j += 2) {
274 cur = (last + *src++) & 0x1F;
275 ybuf[j] = last + cur;
276 ybuf[j+1] = cur << 1;
281 ybuf += avctx->
width;
283 for (i = 1; i < avctx->
height; i++) {
284 last = ((prev_buf[0] >> 1) + *src++) & 0x1F;
286 for (j = 1; j < avctx->
width - 1; j += 2) {
287 cur = ((prev_buf[j + 1] >> 1) + *src++) & 0x1F;
288 ybuf[j] = last + cur;
289 ybuf[j+1] = cur << 1;
294 ybuf += avctx->
width;
298 int corr_end, dec_size;
301 if (chroma_off > corr_off)
302 corr_end = chroma_off;
307 for (i = 0; i < dec_size; i++)
313 for (j = 0; j < avctx->
height; j++) {
314 for (i = 0; i < avctx->
width; i++)
315 ybuf[i] = (src[i] << 2) | (src[i] >> 3);
343 for (i = 0; i < avctx->
height; i++) {
344 last = (ybuf[0] + (*src++ << 1)) & 0x3F;
346 for (j = 1; j < avctx->
width - 1; j += 2) {
347 cur = (ybuf[j + 1] + (*src++ << 1)) & 0x3F;
348 ybuf[j] = (last + cur) >> 1;
353 ybuf += avctx->
width;
358 for (j = 0; j < avctx->
height; j++) {
359 for (i = 0; i < avctx->
width; i++)
360 ybuf[i] = (src[i] << 2) | (src[i] >> 3);
369 void *
data,
int *data_size,
386 ftype = bytestream2_get_le32(&s->
gb);