75 #define PALETTE_COUNT 256
76 #define VQA_HEADER_SIZE 0x2A
80 #define MAX_CODEBOOK_VECTORS 0xFF00
81 #define SOLID_PIXEL_VECTORS 0x100
82 #define MAX_VECTORS (MAX_CODEBOOK_VECTORS + SOLID_PIXEL_VECTORS)
83 #define MAX_CODEBOOK_SIZE (MAX_VECTORS * 4 * 4)
85 #define CBF0_TAG MKBETAG('C', 'B', 'F', '0')
86 #define CBFZ_TAG MKBETAG('C', 'B', 'F', 'Z')
87 #define CBP0_TAG MKBETAG('C', 'B', 'P', '0')
88 #define CBPZ_TAG MKBETAG('C', 'B', 'P', 'Z')
89 #define CPL0_TAG MKBETAG('C', 'P', 'L', '0')
90 #define CPLZ_TAG MKBETAG('C', 'P', 'L', 'Z')
91 #define VPTZ_TAG MKBETAG('V', 'P', 'T', 'Z')
124 int i, j, codebook_index;
178 codebook_index = 0xFF00 * 16;
179 for (i = 0; i < 256; i++)
180 for (j = 0; j < 16; j++)
183 codebook_index = 0xF00 * 8;
184 for (i = 0; i < 256; i++)
185 for (j = 0; j < 8; j++)
200 #define CHECK_COUNT() \
201 if (dest_index + count > dest_size) { \
202 av_log(NULL, AV_LOG_ERROR, " VQA video: decode_format80 problem: next op would overflow dest_index\n"); \
203 av_log(NULL, AV_LOG_ERROR, " VQA video: current dest_index = %d, count = %d, dest_size = %d\n", \
204 dest_index, count, dest_size); \
205 return AVERROR_INVALIDDATA; \
208 #define CHECK_COPY(idx) \
209 if (idx < 0 || idx + count > dest_size) { \
210 av_log(NULL, AV_LOG_ERROR, " VQA video: decode_format80 problem: next op would overflow dest_index\n"); \
211 av_log(NULL, AV_LOG_ERROR, " VQA video: current src_pos = %d, count = %d, dest_size = %d\n", \
212 src_pos, count, dest_size); \
213 return AVERROR_INVALIDDATA; \
218 unsigned char *dest,
int dest_size,
int check_size) {
221 int count, opcode, start;
228 opcode = bytestream2_get_byte(gb);
235 if (dest_index >= dest_size) {
236 av_log(
NULL,
AV_LOG_ERROR,
" VQA video: decode_format80 problem: dest_index (%d) exceeded dest_size (%d)\n",
237 dest_index, dest_size);
241 if (opcode == 0xFF) {
243 count = bytestream2_get_le16(gb);
244 src_pos = bytestream2_get_le16(gb);
245 av_dlog(
NULL,
"(1) copy %X bytes from absolute pos %X\n", count, src_pos);
248 for (i = 0; i < count; i++)
249 dest[dest_index + i] = dest[src_pos + i];
252 }
else if (opcode == 0xFE) {
254 count = bytestream2_get_le16(gb);
255 color = bytestream2_get_byte(gb);
256 av_dlog(
NULL,
"(2) set %X bytes to %02X\n", count, color);
258 memset(&dest[dest_index], color, count);
261 }
else if ((opcode & 0xC0) == 0xC0) {
263 count = (opcode & 0x3F) + 3;
264 src_pos = bytestream2_get_le16(gb);
265 av_dlog(
NULL,
"(3) copy %X bytes from absolute pos %X\n", count, src_pos);
268 for (i = 0; i < count; i++)
269 dest[dest_index + i] = dest[src_pos + i];
272 }
else if (opcode > 0x80) {
274 count = opcode & 0x3F;
275 av_dlog(
NULL,
"(4) copy %X bytes from source to dest\n", count);
282 count = ((opcode & 0x70) >> 4) + 3;
283 src_pos = bytestream2_get_byte(gb) | ((opcode & 0x0F) << 8);
284 av_dlog(
NULL,
"(5) copy %X bytes from relpos %X\n", count, src_pos);
287 for (i = 0; i < count; i++)
288 dest[dest_index + i] = dest[dest_index - src_pos + i];
298 if (dest_index < dest_size)
299 av_log(
NULL,
AV_LOG_ERROR,
" VQA video: decode_format80 problem: decode finished with dest_index (%d) < dest_size (%d)\n",
300 dest_index, dest_size);
307 unsigned int chunk_type;
308 unsigned int chunk_size;
310 unsigned int index = 0;
312 unsigned char r,
g,
b;
327 int vector_index = 0;
336 chunk_type = bytestream2_get_be32u(&s->
gb);
338 chunk_size = bytestream2_get_be32u(&s->
gb);
340 switch (chunk_type) {
372 (chunk_type >> 24) & 0xFF,
373 (chunk_type >> 16) & 0xFF,
374 (chunk_type >> 8) & 0xFF,
375 (chunk_type >> 0) & 0xFF,
380 byte_skip = chunk_size & 0x01;
385 if ((cpl0_chunk != -1) && (cplz_chunk != -1)) {
393 if (cplz_chunk != -1) {
400 if (cpl0_chunk != -1) {
403 chunk_size = bytestream2_get_be32(&s->
gb);
410 for (i = 0; i < chunk_size / 3; i++) {
412 r = bytestream2_get_byteu(&s->
gb) * 4;
413 g = bytestream2_get_byteu(&s->
gb) * 4;
414 b = bytestream2_get_byteu(&s->
gb) * 4;
415 s->
palette[i] = (r << 16) | (g << 8) | (
b);
420 if ((cbf0_chunk != -1) && (cbfz_chunk != -1)) {
428 if (cbfz_chunk != -1) {
431 chunk_size = bytestream2_get_be32(&s->
gb);
438 if (cbf0_chunk != -1) {
441 chunk_size = bytestream2_get_be32(&s->
gb);
453 if (vptz_chunk == -1) {
461 chunk_size = bytestream2_get_be32(&s->
gb);
474 for (x = y; x < y + s->
width; x += 4, lobytes++, hibytes++) {
484 vector_index = ((hibyte << 8) | lobyte) >> 3;
485 vector_index <<= index_shift;
488 if (hibyte == 0xFF) {
490 s->
frame.
data[0][pixel_ptr + 0] = 255 - lobyte;
491 s->
frame.
data[0][pixel_ptr + 1] = 255 - lobyte;
492 s->
frame.
data[0][pixel_ptr + 2] = 255 - lobyte;
493 s->
frame.
data[0][pixel_ptr + 3] = 255 - lobyte;
503 vector_index = (hibyte << 8) | lobyte;
504 vector_index <<= index_shift;
525 if ((cbp0_chunk != -1) && (cbpz_chunk != -1)) {
531 if (cbp0_chunk != -1) {
534 chunk_size = bytestream2_get_be32(&s->
gb);
560 if (cbpz_chunk != -1) {
563 chunk_size = bytestream2_get_be32(&s->
gb);
596 void *
data,
int *data_size,