46 const uint8_t *val_table,
int nb_codes,
47 int use_static,
int is_ac)
49 uint8_t huff_size[256];
50 uint16_t huff_code[256];
51 uint16_t huff_sym[256];
54 assert(nb_codes <= 256);
56 memset(huff_size, 0,
sizeof(huff_size));
59 for (i = 0; i < 256; i++)
60 huff_sym[i] = i + 16 * is_ac;
63 huff_sym[0] = 16 * 256;
66 huff_code, 2, 2, huff_sym, 2, 2, use_static);
104 #if FF_API_MJPEG_GLOBAL_OPTS
105 if (avctx->
flags & CODEC_FLAG_EXTERN_HUFF)
113 "mjpeg: error using external huffman table\n");
146 for (i = 0; i < 64; i++) {
164 int len,
index, i,
class, n,
v, code_max;
165 uint8_t bits_table[17];
166 uint8_t val_table[256];
180 for (i = 1; i <= 16; i++) {
185 if (len < n || n > 256)
189 for (i = 0; i < n; i++) {
200 class, index, code_max + 1);
202 code_max + 1, 0,
class > 0) < 0)
208 code_max + 1, 0, 0) < 0)
245 if (nb_components <= 0 ||
251 "nb_components changing in interlaced picture\n");
255 if (s->
ls && !(s->
bits <= 8 || nb_components == 1)) {
257 "only <= 8 bits/component or 16-bit gray accepted for JPEG-LS\n");
263 for (i = 0; i < nb_components; i++) {
278 "Invalid sampling factor in component %d %d:%d\n",
290 "Subsampling in JPEG-LS is not supported.\n");
332 if (!(pix_fmt_id & 0xD0D0D0D0))
333 pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
334 if (!(pix_fmt_id & 0x0D0D0D0D))
335 pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
337 switch (pix_fmt_id) {
367 }
else if (s->
bits <= 8)
384 for (i = 0; i < 3; i++)
391 if (len != (8 + (3 * nb_components)))
397 int bw = (width + s->
h_max * 8 - 1) / (s->
h_max * 8);
398 int bh = (height + s->
v_max * 8 - 1) / (s->
v_max * 8);
418 "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
419 0, dc_index, &s->
vlcs[0][dc_index]);
431 int dc_index,
int ac_index, int16_t *quant_matrix)
433 int code, i, j,
level, val;
441 val = val * quant_matrix[0] + s->
last_dc[component];
451 i += ((unsigned)code) >> 4;
459 int sign = (~cache) >> 31;
460 level = (
NEG_USR32(sign ^ cache,code) ^ sign) - sign;
470 block[j] = level * quant_matrix[j];
479 int component,
int dc_index,
480 int16_t *quant_matrix,
int Al)
489 val = (val * quant_matrix[0] << Al) + s->
last_dc[component];
497 uint8_t *last_nnz,
int ac_index,
498 int16_t *quant_matrix,
499 int ss,
int se,
int Al,
int *EOBRUN)
510 for (i = ss; ; i++) {
514 run = ((unsigned) code) >> 4;
523 int sign = (~cache) >> 31;
524 level = (
NEG_USR32(sign ^ cache,code) ^ sign) - sign;
532 block[j] = level * quant_matrix[j] << Al;
539 block[j] = level * quant_matrix[j] << Al;
568 #define REFINE_BIT(j) { \
569 UPDATE_CACHE(re, &s->gb); \
570 sign = block[j] >> 15; \
571 block[j] += SHOW_UBITS(re, &s->gb, 1) * \
572 ((quant_matrix[j] ^ sign) - sign) << Al; \
573 LAST_SKIP_BITS(re, &s->gb, 1); \
581 av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
586 j = s->scantable.permutated[i]; \
589 else if (run-- == 0) \
596 int ac_index, int16_t *quant_matrix,
597 int ss,
int se,
int Al,
int *EOBRUN)
599 int code, i = ss, j, sign, val,
run;
600 int last =
FFMIN(se, *last_nnz);
611 run = ((unsigned) code) >> 4;
618 block[j] = ((quant_matrix[j]^val) - val) << Al;
626 run = ((unsigned) code) >> 4;
647 for (; i <= last; i++) {
664 int left[3], top[3], topleft[3];
665 const int linesize = s->
linesize[0];
666 const int mask = (1 << s->
bits) - 1;
672 for (i = 0; i < 3; i++)
673 buffer[0][i] = 1 << (s->
bits + point_transform - 1);
675 for (mb_y = 0; mb_y < s->
mb_height; mb_y++) {
676 const int modified_predictor = mb_y ? predictor : 1;
680 ptr += linesize >> 1;
682 for (i = 0; i < 3; i++)
683 top[i] = left[i] = topleft[i] =
buffer[0][i];
685 for (mb_x = 0; mb_x < s->
mb_width; mb_x++) {
689 for (i = 0; i < 3; i++) {
695 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
697 left[i] =
buffer[mb_x][i] =
708 for (mb_x = 0; mb_x < s->
mb_width; mb_x++) {
709 ptr[4 * mb_x + 1] =
buffer[mb_x][0] - ((
buffer[mb_x][1] +
buffer[mb_x][2] - 0x200) >> 2);
710 ptr[4 * mb_x + 0] =
buffer[mb_x][1] + ptr[4 * mb_x + 1];
711 ptr[4 * mb_x + 2] =
buffer[mb_x][2] + ptr[4 * mb_x + 1];
714 for (mb_x = 0; mb_x < s->
mb_width; mb_x++) {
716 ptr[4 * mb_x + 0] =
buffer[mb_x][1] + ptr[4 * mb_x + 1];
717 ptr[4 * mb_x + 2] =
buffer[mb_x][2] + ptr[4 * mb_x + 1];
720 for (mb_x = 0; mb_x < s->
mb_width; mb_x++) {
721 ptr[4 * mb_x + 0] =
buffer[mb_x][2];
722 ptr[4 * mb_x + 1] =
buffer[mb_x][1];
723 ptr[4 * mb_x + 2] =
buffer[mb_x][0];
731 int point_transform,
int nb_components)
735 for (mb_y = 0; mb_y < s->
mb_height; mb_y++) {
736 for (mb_x = 0; mb_x < s->
mb_width; mb_x++) {
740 if (mb_x == 0 || mb_y == 0 || s->
interlaced) {
741 for (i = 0; i < nb_components; i++) {
743 int n, h,
v, x, y, c, j, linesize;
752 for (j = 0; j < n; j++) {
756 (linesize * (v * mb_y + y)) +
758 if (y == 0 && mb_y == 0) {
759 if (x == 0 && mb_x == 0)
760 pred = 128 << point_transform;
764 if (x == 0 && mb_x == 0)
765 pred = ptr[-linesize];
767 PREDICT(pred, ptr[-linesize - 1],
768 ptr[-linesize], ptr[-1], predictor);
772 ptr += linesize >> 1;
782 for (i = 0; i < nb_components; i++) {
784 int n, h,
v, x, y, c, j, linesize;
793 for (j = 0; j < n; j++) {
798 (linesize * (v * mb_y + y)) +
800 PREDICT(pred, ptr[-linesize - 1],
801 ptr[-linesize], ptr[-1], predictor);
823 case 0:
copy_block8(dst, src, linesize, linesize, 8);
825 case 1:
copy_block4(dst, src, linesize, linesize, 4);
827 case 2:
copy_block2(dst, src, linesize, linesize, 2);
835 int Al,
const uint8_t *mb_bitmask,
849 "Can not flip image with CODEC_FLAG_EMU_EDGE set!\n");
853 for (i = 0; i < nb_components; i++) {
856 reference_data[c] = reference ? reference->
data[c] :
NULL;
861 int offset = (linesize[c] * (s->
v_scount[i] *
864 reference_data[c] += offset;
869 for (mb_y = 0; mb_y < s->
mb_height; mb_y++) {
870 for (mb_x = 0; mb_x < s->
mb_width; mb_x++) {
871 const int copy_mb = mb_bitmask && !
get_bits1(&mb_bitmask_gb);
881 for (i = 0; i < nb_components; i++) {
883 int n, h,
v, x, y, c, j;
891 for (j = 0; j < n; j++) {
892 block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
896 block_offset += linesize[c] >> 1;
897 ptr = data[c] + block_offset;
908 "error y=%d x=%d\n", mb_y, mb_x);
924 "error y=%d x=%d\n", mb_y, mb_x);
950 for (i = 0; i < nb_components; i++)
962 int se,
int Ah,
int Al,
963 const uint8_t *mb_bitmask,
970 const uint8_t *reference_data = reference ? reference->
data[c] :
NULL;
976 if (ss < 0 || ss >= 64 ||
977 se < ss || se >= 64 ||
990 int offset = linesize >> 1;
992 reference_data += offset;
995 for (mb_y = 0; mb_y < s->
mb_height; mb_y++) {
996 int block_offset = (mb_y * linesize * 8 >> s->
avctx->
lowres);
997 uint8_t *ptr = data + block_offset;
1000 uint8_t *last_nnz = &s->
last_nnz[c][block_idx];
1001 for (mb_x = 0; mb_x < s->
mb_width; mb_x++,
block++, last_nnz++) {
1002 const int copy_mb = mb_bitmask && !
get_bits1(&mb_bitmask_gb);
1008 quant_matrix, ss, se, Al, &EOBRUN);
1011 quant_matrix, ss, se, Al, &EOBRUN);
1014 "error y=%d x=%d\n", mb_y, mb_x);
1036 int len, nb_components, i, h,
v, predictor, point_transform;
1038 const int block_size = s->
lossless ? 1 : 8;
1039 int ilv, prev_shift;
1046 "decode_sos: nb_components (%d) unsupported\n", nb_components);
1049 if (len != 6 + 2 * nb_components) {
1053 for (i = 0; i < nb_components; i++) {
1062 "decode_sos: index(%d) out of components\n", index);
1092 for (i = 0; i < nb_components; i++)
1095 if (nb_components > 1) {
1099 }
else if (!s->
ls) {
1102 s->
mb_width = (s->
width + h * block_size - 1) / (h * block_size);
1111 s->
lossless ?
"lossless" :
"sequential DCT", s->
rgb ?
"RGB" :
"",
1112 predictor, point_transform, ilv, s->
bits,
1141 mb_bitmask, reference) < 0)
1145 mb_bitmask, reference) < 0)
1218 int t_w, t_h, v1, v2;
1229 "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1238 if (len -10 - (t_w * t_h * 3) > 0)
1239 len -= t_w * t_h * 3;
1259 "Pegasus lossless jpeg header found\n");
1306 "mjpeg: error, decode_app parser read over the end\n");
1320 for (i = 0; i < len - 2; i++)
1322 if (i > 0 && cbuf[i - 1] ==
'\n')
1331 if (!strcmp(cbuf,
"AVID")) {
1335 }
else if (!strcmp(cbuf,
"CS=ITU601"))
1337 else if ((len > 20 && !strncmp(cbuf,
"Intel(R) JPEG Library", 21)) ||
1338 (len > 19 && !strncmp(cbuf,
"Metasoft MJPEG Codec", 20)))
1350 static int find_marker(
const uint8_t **pbuf_ptr,
const uint8_t *buf_end)
1352 const uint8_t *buf_ptr;
1359 buf_ptr = *pbuf_ptr;
1360 while (buf_ptr < buf_end) {
1363 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1373 av_dlog(
NULL,
"find_marker skipped %d bytes\n", skipped);
1374 *pbuf_ptr = buf_ptr;
1379 const uint8_t **buf_ptr,
const uint8_t *buf_end,
1380 const uint8_t **unescaped_buf_ptr,
1381 int *unescaped_buf_size)
1391 "buffer too small, expanding to %d bytes\n", s->
buffer_size);
1395 if (start_code ==
SOS && !s->
ls) {
1396 const uint8_t *src = *buf_ptr;
1397 uint8_t *dst = s->
buffer;
1399 while (src < buf_end) {
1400 uint8_t x = *(src++);
1405 while (src < buf_end && x == 0xff)
1408 if (x >= 0xd0 && x <= 0xd7)
1415 *unescaped_buf_ptr = s->
buffer;
1416 *unescaped_buf_size = dst - s->
buffer;
1419 (buf_end - *buf_ptr) - (dst - s->
buffer));
1420 }
else if (start_code ==
SOS && s->
ls) {
1421 const uint8_t *src = *buf_ptr;
1422 uint8_t *dst = s->
buffer;
1430 while (src + t < buf_end) {
1431 uint8_t x = src[t++];
1433 while ((src + t < buf_end) && x == 0xff)
1446 uint8_t x = src[
b++];
1456 *unescaped_buf_ptr = dst;
1457 *unescaped_buf_size = (bit_count + 7) >> 3;
1459 *unescaped_buf_ptr = *buf_ptr;
1460 *unescaped_buf_size = buf_end - *buf_ptr;
1469 const uint8_t *buf = avpkt->
data;
1470 int buf_size = avpkt->
size;
1472 const uint8_t *buf_end, *buf_ptr;
1473 const uint8_t *unescaped_buf_ptr;
1474 int unescaped_buf_size;
1480 buf_end = buf + buf_size;
1481 while (buf_ptr < buf_end) {
1485 &unescaped_buf_size);
1487 if (start_code < 0) {
1489 }
else if (unescaped_buf_size > (1
U<<29)) {
1490 av_log(avctx,
AV_LOG_ERROR,
"MJPEG packet 0x%x too big (0x%x/0x%x), corrupt data?\n",
1491 start_code, unescaped_buf_ptr, buf_size);
1495 start_code, buf_end - buf_ptr);
1504 if (start_code >= 0xd0 && start_code <= 0xd7)
1506 "restart marker: %d\n", start_code & 0x0f);
1508 else if (start_code >=
APP0 && start_code <=
APP15)
1511 else if (start_code ==
COM)
1515 (start_code ==
SOF48 || start_code ==
LSE)) {
1520 switch (start_code) {
1575 "Found EOI before any SOF, ignoring\n");
1594 (s->
width + 15) / 16);
1597 "QP: %d\n", picture->
quality);
1605 "Can not process SOS before SOF, skipping\n");
1630 "mjpeg: unsupported coding type (%x)\n", start_code);
1641 "marker parser used %d bytes (%d bits)\n",
1655 return buf_ptr - buf;
1671 for (i = 0; i < 3; i++) {
1672 for (j = 0; j < 4; j++)
1682 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
1683 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1685 {
"extern_huff",
"Use external huffman table.",