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24 #include "config_components.h"
131 0x01, 0x01, 0x11, 0x11, 0x55, 0x55, 0xff,
136 0xff, 0xff, 0x0f, 0xff, 0x33, 0xff, 0x55,
141 0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, 0xff
148 int bits_per_pixel,
int pass,
149 int color_type,
const uint8_t *
src)
151 int x,
mask, dsp_mask, j, src_x,
b, bpp;
158 switch (bits_per_pixel) {
161 for (x = 0; x <
width; x++) {
163 if ((dsp_mask << j) & 0x80) {
164 b = (
src[src_x >> 3] >> (7 - (src_x & 7))) & 1;
165 dst[x >> 3] &= 0xFF7F>>j;
166 dst[x >> 3] |=
b << (7 - j);
168 if ((
mask << j) & 0x80)
174 for (x = 0; x <
width; x++) {
175 int j2 = 2 * (x & 3);
177 if ((dsp_mask << j) & 0x80) {
178 b = (
src[src_x >> 2] >> (6 - 2*(src_x & 3))) & 3;
179 dst[x >> 2] &= 0xFF3F>>j2;
180 dst[x >> 2] |=
b << (6 - j2);
182 if ((
mask << j) & 0x80)
188 for (x = 0; x <
width; x++) {
191 if ((dsp_mask << j) & 0x80) {
192 b = (
src[src_x >> 1] >> (4 - 4*(src_x & 1))) & 15;
193 dst[x >> 1] &= 0xFF0F>>j2;
194 dst[x >> 1] |=
b << (4 - j2);
196 if ((
mask << j) & 0x80)
201 bpp = bits_per_pixel >> 3;
204 for (x = 0; x <
width; x++) {
206 if ((dsp_mask << j) & 0x80) {
210 if ((
mask << j) & 0x80)
221 for (
i = 0;
i <
w;
i++) {
222 int a,
b,
c, p, pa, pb, pc;
235 if (pa <= pb && pa <= pc)
245 #define UNROLL1(bpp, op) \
254 for (; i <= size - bpp; i += bpp) { \
255 dst[i + 0] = r = op(r, src[i + 0], last[i + 0]); \
258 dst[i + 1] = g = op(g, src[i + 1], last[i + 1]); \
261 dst[i + 2] = b = op(b, src[i + 2], last[i + 2]); \
264 dst[i + 3] = a = op(a, src[i + 3], last[i + 3]); \
268 #define UNROLL_FILTER(op) \
271 } else if (bpp == 2) { \
273 } else if (bpp == 3) { \
275 } else if (bpp == 4) { \
278 for (; i < size; i++) { \
279 dst[i] = op(dst[i - bpp], src[i], last[i]); \
284 uint8_t *
src, uint8_t *last,
int size,
int bpp)
286 int i, p,
r,
g,
b,
a;
288 switch (filter_type) {
293 for (
i = 0;
i < bpp;
i++)
297 for (;
i <
size;
i += bpp) {
298 unsigned s = *(
int *)(
src +
i);
299 p = ((
s & 0x7f7f7f7f) + (p & 0x7f7f7f7f)) ^ ((
s ^ p) & 0x80808080);
300 *(
int *)(dst +
i) = p;
303 #define OP_SUB(x, s, l) ((x) + (s))
311 for (
i = 0;
i < bpp;
i++) {
315 #define OP_AVG(x, s, l) (((((x) + (l)) >> 1) + (s)) & 0xff)
319 for (
i = 0;
i < bpp;
i++) {
323 if (bpp > 2 &&
size > 4) {
340 #define YUV2RGB(NAME, TYPE) \
341 static void deloco_ ## NAME(TYPE *dst, int size, int alpha) \
344 for (i = 0; i < size - 2; i += 3 + alpha) { \
345 int g = dst [i + 1]; \
356 if (
s->interlace_type) {
359 return 100 - 100 *
s->y /
s->cur_h;
366 uint8_t *ptr, *last_row;
369 if (!
s->interlace_type) {
370 ptr = dst + dst_stride * (
s->y +
s->y_offset) +
s->x_offset *
s->bpp;
372 last_row =
s->last_row;
374 last_row = ptr - dst_stride;
377 last_row,
s->row_size,
s->bpp);
380 if (
s->bit_depth == 16) {
381 deloco_rgb16((uint16_t *)(ptr - dst_stride),
s->row_size / 2,
384 deloco_rgb8(ptr - dst_stride,
s->row_size,
389 if (
s->y ==
s->cur_h) {
392 if (
s->bit_depth == 16) {
393 deloco_rgb16((uint16_t *)ptr,
s->row_size / 2,
396 deloco_rgb8(ptr,
s->row_size,
404 ptr = dst + dst_stride * (
s->y +
s->y_offset) +
s->x_offset *
s->bpp;
411 s->last_row,
s->pass_row_size,
s->bpp);
412 FFSWAP(uint8_t *,
s->last_row,
s->tmp_row);
413 FFSWAP(
unsigned int,
s->last_row_size,
s->tmp_row_size);
418 s->color_type,
s->last_row);
421 if (
s->y ==
s->cur_h) {
422 memset(
s->last_row, 0,
s->row_size);
433 s->crow_size =
s->pass_row_size + 1;
434 if (
s->pass_row_size != 0)
446 uint8_t *dst, ptrdiff_t dst_stride)
448 z_stream *
const zstream = &
s->zstream.zstream;
451 zstream->next_in = gb->
buffer;
454 while (zstream->avail_in > 0) {
456 if (
ret != Z_OK &&
ret != Z_STREAM_END) {
460 if (zstream->avail_out == 0) {
464 zstream->avail_out =
s->crow_size;
465 zstream->next_out =
s->crow_buf;
467 if (
ret == Z_STREAM_END && zstream->avail_in > 0) {
469 "%d undecompressed bytes left in buffer\n", zstream->avail_in);
477 const uint8_t *data_end,
void *logctx)
480 z_stream *
const zstream = &z.
zstream;
487 zstream->next_in =
data;
488 zstream->avail_in = data_end -
data;
491 while (zstream->avail_in > 0) {
497 zstream->next_out = buf;
498 zstream->avail_out = buf_size - 1;
500 if (
ret != Z_OK &&
ret != Z_STREAM_END) {
504 bp->len += zstream->next_out - buf;
505 if (
ret == Z_STREAM_END)
509 bp->str[bp->len] = 0;
523 for (
i = 0;
i < size_in;
i++)
524 extra += !!(in[
i] & 0x80);
525 if (size_in == SIZE_MAX || extra > SIZE_MAX - size_in - 1)
530 for (
i = 0;
i < size_in;
i++) {
532 *(q++) = 0xC0 | (in[
i] >> 6);
533 *(q++) = 0x80 | (in[
i] & 0x3F);
547 const char *keyword =
data;
548 const char *keyword_end = memchr(keyword, 0, data_end -
data);
549 char *kw_utf8 =
NULL, *txt_utf8 =
NULL;
556 data = keyword_end + 1;
559 if (
data == data_end)
570 text_len = data_end -
data;
605 s->width =
s->cur_w = bytestream2_get_be32(gb);
606 s->height =
s->cur_h = bytestream2_get_be32(gb);
608 s->cur_w =
s->cur_h =
s->width =
s->height = 0;
612 s->bit_depth = bytestream2_get_byte(gb);
613 if (
s->bit_depth != 1 &&
s->bit_depth != 2 &&
s->bit_depth != 4 &&
614 s->bit_depth != 8 &&
s->bit_depth != 16) {
618 s->color_type = bytestream2_get_byte(gb);
619 s->compression_type = bytestream2_get_byte(gb);
620 if (
s->compression_type) {
624 s->filter_type = bytestream2_get_byte(gb);
625 s->interlace_type = bytestream2_get_byte(gb);
629 "compression_type=%d filter_type=%d interlace_type=%d\n",
630 s->width,
s->height,
s->bit_depth,
s->color_type,
631 s->compression_type,
s->filter_type,
s->interlace_type);
635 s->cur_w =
s->cur_h =
s->width =
s->height = 0;
675 if (
s->cicp_range == 0) {
678 }
else if (
s->cicp_range != 1) {
682 }
else if (
s->iccp_data) {
685 s->iccp_data_len, &sd);
689 memcpy(sd->
data,
s->iccp_data,
s->iccp_data_len);
692 }
else if (
s->have_srgb) {
695 }
else if (
s->have_chrm) {
714 if (
s->iccp_data ||
s->have_srgb ||
s->have_cicp) {
716 }
else if (
s->gamma) {
726 if (
s->gamma > 45355 &&
s->gamma < 45555)
728 else if (
s->gamma > 35614 &&
s->gamma < 35814)
730 else if (
s->gamma > 38362 &&
s->gamma < 38562)
732 else if (
s->gamma > 99900 &&
s->gamma < 100100)
738 if (!
s->have_cicp ||
s->cicp_range == 1)
746 if (!
s->has_trns &&
s->significant_bits > 0)
761 clli->
MaxCLL =
s->clli_max / 10000;
762 clli->
MaxFALL =
s->clli_avg / 10000;
775 for (
int i = 0;
i < 3;
i++) {
794 size_t byte_depth =
s->bit_depth > 8 ? 2 : 1;
809 s->bits_per_pixel =
s->bit_depth *
s->channels;
810 s->bpp = (
s->bits_per_pixel + 7) >> 3;
811 s->row_size = (
s->cur_w *
s->bits_per_pixel + 7) >> 3;
813 if ((
s->bit_depth == 2 ||
s->bit_depth == 4 ||
s->bit_depth == 8) &&
816 }
else if ((
s->bit_depth == 2 ||
s->bit_depth == 4 ||
s->bit_depth == 8) &&
819 }
else if ((
s->bit_depth == 2 ||
s->bit_depth == 4 ||
s->bit_depth == 8) &&
822 }
else if (
s->bit_depth == 16 &&
825 }
else if (
s->bit_depth == 16 &&
828 }
else if (
s->bit_depth == 16 &&
831 }
else if ((
s->bits_per_pixel == 1 ||
s->bits_per_pixel == 2 ||
s->bits_per_pixel == 4 ||
s->bits_per_pixel == 8) &&
836 }
else if (
s->bit_depth == 8 &&
839 }
else if (
s->bit_depth == 16 &&
844 "Bit depth %d color type %d",
845 s->bit_depth,
s->color_type);
869 "and color type %d with TRNS",
870 s->bit_depth,
s->color_type);
874 s->bpp += byte_depth;
913 if (!
s->interlace_type) {
914 s->crow_size =
s->row_size + 1;
920 s->crow_size =
s->pass_row_size + 1;
922 ff_dlog(avctx,
"row_size=%d crow_size =%d\n",
923 s->row_size,
s->crow_size);
927 memcpy(p->
data[1],
s->palette, 256 *
sizeof(uint32_t));
932 if (
s->interlace_type ||
944 s->crow_buf =
s->buffer + 15;
945 s->zstream.zstream.avail_out =
s->crow_size;
946 s->zstream.zstream.next_out =
s->crow_buf;
953 s->bpp -= byte_depth;
958 s->bpp += byte_depth;
972 if ((length % 3) != 0 || length > 256 * 3)
976 for (
i = 0;
i < n;
i++) {
977 r = bytestream2_get_byte(gb);
978 g = bytestream2_get_byte(gb);
979 b = bytestream2_get_byte(gb);
980 s->palette[
i] = (0xFF
U << 24) | (
r << 16) | (
g << 8) |
b;
983 s->palette[
i] = (0xFFU << 24);
1006 if (length > 256 || !(
s->hdr_state &
PNG_PLTE))
1009 for (
i = 0;
i < length;
i++) {
1010 unsigned v = bytestream2_get_byte(gb);
1011 s->palette[
i] = (
s->palette[
i] & 0x00ffffff) | (v << 24);
1019 for (
i = 0;
i < length / 2;
i++) {
1023 if (
s->bit_depth > 8)
1024 AV_WB16(&
s->transparent_color_be[2 *
i], v);
1026 s->transparent_color_be[
i] = v;
1042 while ((
s->iccp_name[cnt++] = bytestream2_get_byte(gb)) && cnt < 81);
1049 if (bytestream2_get_byte(gb) != 0) {
1062 s->iccp_data_len = bp.len;
1066 s->iccp_name[0] = 0;
1092 int b = bytestream2_get_byteu(gb);
1096 if (bits < 0 || bits >
s->bit_depth) {
1100 s->significant_bits =
bits;
1109 uint8_t *pd = p->
data[0];
1110 for (j = 0; j <
s->height; j++) {
1112 for (k = 7; k >= 1; k--)
1113 if ((
s->width&7) >= k)
1114 pd[8*
i + k - 1] = (pd[
i]>>8-k) & 1;
1115 for (
i--;
i >= 0;
i--) {
1116 pd[8*
i + 7]= pd[
i] & 1;
1117 pd[8*
i + 6]= (pd[
i]>>1) & 1;
1118 pd[8*
i + 5]= (pd[
i]>>2) & 1;
1119 pd[8*
i + 4]= (pd[
i]>>3) & 1;
1120 pd[8*
i + 3]= (pd[
i]>>4) & 1;
1121 pd[8*
i + 2]= (pd[
i]>>5) & 1;
1122 pd[8*
i + 1]= (pd[
i]>>6) & 1;
1123 pd[8*
i + 0]= pd[
i]>>7;
1127 }
else if (
s->bits_per_pixel == 2) {
1129 uint8_t *pd = p->
data[0];
1130 for (j = 0; j <
s->height; j++) {
1133 if ((
s->width&3) >= 3) pd[4*
i + 2]= (pd[
i] >> 2) & 3;
1134 if ((
s->width&3) >= 2) pd[4*
i + 1]= (pd[
i] >> 4) & 3;
1135 if ((
s->width&3) >= 1) pd[4*
i + 0]= pd[
i] >> 6;
1136 for (
i--;
i >= 0;
i--) {
1137 pd[4*
i + 3]= pd[
i] & 3;
1138 pd[4*
i + 2]= (pd[
i]>>2) & 3;
1139 pd[4*
i + 1]= (pd[
i]>>4) & 3;
1140 pd[4*
i + 0]= pd[
i]>>6;
1143 if ((
s->width&3) >= 3) pd[4*
i + 2]= ((pd[
i]>>2) & 3)*0x55;
1144 if ((
s->width&3) >= 2) pd[4*
i + 1]= ((pd[
i]>>4) & 3)*0x55;
1145 if ((
s->width&3) >= 1) pd[4*
i + 0]= ( pd[
i]>>6 )*0x55;
1146 for (
i--;
i >= 0;
i--) {
1147 pd[4*
i + 3]= ( pd[
i] & 3)*0x55;
1148 pd[4*
i + 2]= ((pd[
i]>>2) & 3)*0x55;
1149 pd[4*
i + 1]= ((pd[
i]>>4) & 3)*0x55;
1150 pd[4*
i + 0]= ( pd[
i]>>6 )*0x55;
1155 }
else if (
s->bits_per_pixel == 4) {
1157 uint8_t *pd = p->
data[0];
1158 for (j = 0; j <
s->height; j++) {
1161 if (
s->width&1) pd[2*
i+0]= pd[
i]>>4;
1162 for (
i--;
i >= 0;
i--) {
1163 pd[2*
i + 1] = pd[
i] & 15;
1164 pd[2*
i + 0] = pd[
i] >> 4;
1167 if (
s->width & 1) pd[2*
i + 0]= (pd[
i] >> 4) * 0x11;
1168 for (
i--;
i >= 0;
i--) {
1169 pd[2*
i + 1] = (pd[
i] & 15) * 0x11;
1170 pd[2*
i + 0] = (pd[
i] >> 4) * 0x11;
1181 uint32_t sequence_number;
1182 int cur_w, cur_h, x_offset, y_offset, dispose_op, blend_op;
1197 sequence_number = bytestream2_get_be32(gb);
1198 cur_w = bytestream2_get_be32(gb);
1199 cur_h = bytestream2_get_be32(gb);
1200 x_offset = bytestream2_get_be32(gb);
1201 y_offset = bytestream2_get_be32(gb);
1203 dispose_op = bytestream2_get_byte(gb);
1204 blend_op = bytestream2_get_byte(gb);
1206 if (sequence_number == 0 &&
1207 (cur_w !=
s->width ||
1208 cur_h !=
s->height ||
1211 cur_w <= 0 || cur_h <= 0 ||
1212 x_offset < 0 || y_offset < 0 ||
1213 cur_w >
s->width - x_offset|| cur_h >
s->height - y_offset)
1221 if ((sequence_number == 0 || !
s->last_picture.f) &&
1241 s->x_offset = x_offset;
1242 s->y_offset = y_offset;
1243 s->dispose_op = dispose_op;
1244 s->blend_op = blend_op;
1252 uint8_t *pd = p->
data[0];
1253 uint8_t *pd_last =
s->last_picture.f->data[0];
1256 ls =
FFMIN(ls,
s->width *
s->bpp);
1259 for (j = 0; j <
s->height; j++) {
1260 for (
i = 0;
i < ls;
i++)
1261 pd[
i] += pd_last[
i];
1263 pd_last +=
s->last_picture.f->linesize[0];
1269 #define FAST_DIV255(x) ((((x) + 128) * 257) >> 16)
1274 uint8_t *dst = p->
data[0];
1275 ptrdiff_t dst_stride = p->
linesize[0];
1276 const uint8_t *
src =
s->last_picture.f->data[0];
1277 ptrdiff_t src_stride =
s->last_picture.f->linesize[0];
1293 for (y = 0; y <
s->y_offset; y++)
1294 memcpy(dst + y * dst_stride,
src + y * src_stride, p->
width * bpp);
1295 for (y =
s->y_offset; y < s->y_offset +
s->cur_h; y++) {
1296 memcpy(dst + y * dst_stride,
src + y * src_stride,
s->x_offset * bpp);
1297 memcpy(dst + y * dst_stride + (
s->x_offset +
s->cur_w) * bpp,
1298 src + y * src_stride + (
s->x_offset +
s->cur_w) * bpp,
1299 (p->
width -
s->cur_w -
s->x_offset) * bpp);
1301 for (y =
s->y_offset +
s->cur_h; y < p->
height; y++)
1302 memcpy(dst + y * dst_stride,
src + y * src_stride, p->
width * bpp);
1306 for (y =
s->y_offset; y < s->y_offset +
s->cur_h; ++y) {
1307 uint8_t *foreground = dst + dst_stride * y + bpp *
s->x_offset;
1308 const uint8_t *background =
src + src_stride * y + bpp *
s->x_offset;
1309 for (x =
s->x_offset; x < s->x_offset +
s->cur_w; ++x, foreground += bpp, background += bpp) {
1311 uint8_t foreground_alpha, background_alpha, output_alpha;
1320 foreground_alpha = foreground[3];
1321 background_alpha = background[3];
1325 foreground_alpha = foreground[1];
1326 background_alpha = background[1];
1330 if (foreground_alpha == 255)
1333 if (foreground_alpha == 0) {
1334 memcpy(foreground, background, bpp);
1338 output_alpha = foreground_alpha +
FAST_DIV255((255 - foreground_alpha) * background_alpha);
1342 for (
b = 0;
b < bpp - 1; ++
b) {
1343 if (output_alpha == 0) {
1345 }
else if (background_alpha == 255) {
1346 output[
b] =
FAST_DIV255(foreground_alpha * foreground[
b] + (255 - foreground_alpha) * background[
b]);
1348 output[
b] = (255 * foreground_alpha * foreground[
b] + (255 - foreground_alpha) * background_alpha * background[
b]) / (255 * output_alpha);
1352 memcpy(foreground,
output, bpp);
1365 const ptrdiff_t dst_stride =
s->picture.f->linesize[0];
1366 uint8_t *dst =
s->picture.f->data[0] +
s->y_offset * dst_stride + bpp *
s->x_offset;
1370 for (
size_t y = 0; y <
s->cur_h; y++) {
1371 memset(dst, 0, bpp *
s->cur_w);
1380 uint32_t
tag, length;
1381 int decode_next_dat = 0;
1409 length = bytestream2_get_be32(&
s->gb);
1416 uint32_t crc_sig =
AV_RB32(
s->gb.buffer + length + 4);
1417 uint32_t crc_cal = ~
av_crc(crc_tab, UINT32_MAX,
s->gb.buffer, length + 4);
1418 if (crc_sig ^ crc_cal) {
1430 tag = bytestream2_get_le32(&
s->gb);
1441 case MKTAG(
'I',
'H',
'D',
'R'):
1442 case MKTAG(
'p',
'H',
'Y',
's'):
1443 case MKTAG(
't',
'E',
'X',
't'):
1444 case MKTAG(
'I',
'D',
'A',
'T'):
1445 case MKTAG(
't',
'R',
'N',
'S'):
1446 case MKTAG(
's',
'R',
'G',
'B'):
1447 case MKTAG(
'c',
'I',
'C',
'P'):
1448 case MKTAG(
'c',
'H',
'R',
'M'):
1449 case MKTAG(
'g',
'A',
'M',
'A'):
1457 case MKTAG(
'I',
'H',
'D',
'R'):
1461 case MKTAG(
'p',
'H',
'Y',
's'):
1465 case MKTAG(
'f',
'c',
'T',
'L'):
1470 decode_next_dat = 1;
1472 case MKTAG(
'f',
'd',
'A',
'T'):
1479 bytestream2_get_be32(&gb_chunk);
1481 case MKTAG(
'I',
'D',
'A',
'T'):
1487 case MKTAG(
'P',
'L',
'T',
'E'):
1490 case MKTAG(
't',
'R',
'N',
'S'):
1493 case MKTAG(
't',
'E',
'X',
't'):
1497 case MKTAG(
'z',
'T',
'X',
't'):
1501 case MKTAG(
's',
'T',
'E',
'R'): {
1502 int mode = bytestream2_get_byte(&gb_chunk);
1505 s->stereo_mode =
mode;
1508 "Unknown value in sTER chunk (%d)\n",
mode);
1512 case MKTAG(
'c',
'I',
'C',
'P'):
1513 s->cicp_primaries = bytestream2_get_byte(&gb_chunk);
1514 s->cicp_trc = bytestream2_get_byte(&gb_chunk);
1515 if (bytestream2_get_byte(&gb_chunk) != 0)
1517 s->cicp_range = bytestream2_get_byte(&gb_chunk);
1518 if (
s->cicp_range != 0 &&
s->cicp_range != 1)
1522 case MKTAG(
's',
'R',
'G',
'B'):
1527 case MKTAG(
'i',
'C',
'C',
'P'): {
1532 case MKTAG(
'c',
'H',
'R',
'M'): {
1535 s->white_point[0] = bytestream2_get_be32(&gb_chunk);
1536 s->white_point[1] = bytestream2_get_be32(&gb_chunk);
1539 for (
i = 0;
i < 3;
i++) {
1540 s->display_primaries[
i][0] = bytestream2_get_be32(&gb_chunk);
1541 s->display_primaries[
i][1] = bytestream2_get_be32(&gb_chunk);
1546 case MKTAG(
's',
'B',
'I',
'T'):
1550 case MKTAG(
'g',
'A',
'M',
'A'): {
1553 s->gamma = bytestream2_get_be32(&gb_chunk);
1565 case MKTAG(
'c',
'L',
'L',
'i'):
1571 s->clli_max = bytestream2_get_be32u(&gb_chunk);
1572 s->clli_avg = bytestream2_get_be32u(&gb_chunk);
1574 case MKTAG(
'm',
'D',
'V',
'c'):
1580 for (
int i = 0;
i < 3;
i++) {
1581 s->mdvc_primaries[
i][0] = bytestream2_get_be16u(&gb_chunk);
1582 s->mdvc_primaries[
i][1] = bytestream2_get_be16u(&gb_chunk);
1584 s->mdvc_white_point[0] = bytestream2_get_be16u(&gb_chunk);
1585 s->mdvc_white_point[1] = bytestream2_get_be16u(&gb_chunk);
1586 s->mdvc_max_lum = bytestream2_get_be32u(&gb_chunk);
1587 s->mdvc_min_lum = bytestream2_get_be32u(&gb_chunk);
1589 case MKTAG(
'I',
'E',
'N',
'D'):
1614 if (
s->bits_per_pixel <= 4)
1618 for (
int y = 0; y <
s->height; y++) {
1621 for (
int x =
s->width - 1; x >= 0; x--) {
1622 const uint8_t idx = row[x];
1624 row[4*x+2] =
s->palette[idx] & 0xFF;
1625 row[4*x+1] = (
s->palette[idx] >> 8 ) & 0xFF;
1626 row[4*x+0] = (
s->palette[idx] >> 16) & 0xFF;
1627 row[4*x+3] =
s->palette[idx] >> 24;
1634 size_t byte_depth =
s->bit_depth > 8 ? 2 : 1;
1635 size_t raw_bpp =
s->bpp - byte_depth;
1640 for (y = 0; y <
s->height; ++y) {
1643 if (
s->bpp == 2 && byte_depth == 1) {
1644 uint8_t *
pixel = &row[2 *
s->width - 1];
1645 uint8_t *rowp = &row[1 *
s->width - 1];
1646 int tcolor =
s->transparent_color_be[0];
1647 for (x =
s->width; x > 0; --x) {
1648 *
pixel-- = *rowp == tcolor ? 0 : 0xff;
1651 }
else if (
s->bpp == 4 && byte_depth == 1) {
1652 uint8_t *
pixel = &row[4 *
s->width - 1];
1653 uint8_t *rowp = &row[3 *
s->width - 1];
1654 int tcolor =
AV_RL24(
s->transparent_color_be);
1655 for (x =
s->width; x > 0; --x) {
1663 for (x =
s->width; x > 0; --x) {
1664 uint8_t *
pixel = &row[
s->bpp * (x - 1)];
1665 memmove(
pixel, &row[raw_bpp * (x - 1)], raw_bpp);
1667 if (!memcmp(
pixel,
s->transparent_color_be, raw_bpp)) {
1668 memset(&
pixel[raw_bpp], 0, byte_depth);
1670 memset(&
pixel[raw_bpp], 0xff, byte_depth);
1678 if (
s->last_picture.f) {
1680 &&
s->last_picture.f->width == p->
width
1681 &&
s->last_picture.f->height== p->
height
1682 &&
s->last_picture.f->format== p->
format
1686 else if (CONFIG_APNG_DECODER &&
1706 s->iccp_data_len = 0;
1707 s->iccp_name[0] = 0;
1709 s->stereo_mode = -1;
1722 if (
s->stereo_mode >= 0) {
1741 #if CONFIG_PNG_DECODER
1746 const uint8_t *buf = avpkt->
data;
1747 int buf_size = avpkt->
size;
1756 sig = bytestream2_get_be64(&
s->gb);
1763 s->y =
s->has_trns = 0;
1768 ret = inflateReset(&
s->zstream.zstream);
1799 #if CONFIG_APNG_DECODER
1812 if ((
ret = inflateReset(&
s->zstream.zstream)) != Z_OK)
1820 if ((
ret = inflateReset(&
s->zstream.zstream)) != Z_OK)
1904 s->last_row_size = 0;
1906 s->tmp_row_size = 0;
1915 #if CONFIG_APNG_DECODER
1933 #if CONFIG_PNG_DECODER
static void error(const char *err)
void ff_progress_frame_report(ProgressFrame *f, int n)
Notify later decoding threads when part of their reference frame is ready.
#define AV_LOG_WARNING
Something somehow does not look correct.
#define AV_BPRINT_SIZE_UNLIMITED
#define AV_EF_EXPLODE
abort decoding on minor error detection
static void clear_frame_metadata(PNGDecContext *s)
void ff_add_png_paeth_prediction(uint8_t *dst, uint8_t *src, uint8_t *top, int w, int bpp)
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
enum AVColorRange cicp_range
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
@ AV_PIX_FMT_YA8
8 bits gray, 8 bits alpha
enum AVColorSpace colorspace
YUV colorspace type.
AVColorTransferCharacteristic
Color Transfer Characteristic.
void av_bprint_init(AVBPrint *buf, unsigned size_init, unsigned size_max)
Struct that contains both white point location and primaries location, providing the complete descrip...
unsigned int last_row_size
#define APNG_FCTL_CHUNK_SIZE
static int decode_phys_chunk(AVCodecContext *avctx, PNGDecContext *s, GetByteContext *gb)
@ AVCOL_TRC_LINEAR
"Linear transfer characteristics"
int ff_png_get_nb_channels(int color_type)
void(* add_paeth_prediction)(uint8_t *dst, uint8_t *src, uint8_t *top, int w, int bpp)
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
filter_frame For filters that do not use the this method is called when a frame is pushed to the filter s input It can be called at any time except in a reentrant way If the input frame is enough to produce output
static int decode_text_chunk(PNGDecContext *s, GetByteContext *gb, int compressed)
unsigned MaxCLL
Max content light level (cd/m^2).
This structure describes decoded (raw) audio or video data.
@ AVCOL_TRC_NB
Not part of ABI.
@ AV_PIX_FMT_RGBA64BE
packed RGBA 16:16:16:16, 64bpp, 16R, 16G, 16B, 16A, the 2-byte value for each R/G/B/A component is st...
enum AVColorTransferCharacteristic color_trc
Color Transfer Characteristic.
@ AVCOL_RANGE_JPEG
Full range content.
int ff_progress_frame_get_buffer(AVCodecContext *avctx, ProgressFrame *f, int flags)
This function sets up the ProgressFrame, i.e.
@ AVCOL_SPC_RGB
order of coefficients is actually GBR, also IEC 61966-2-1 (sRGB), YZX and ST 428-1
int flags
Frame flags, a combination of AV_FRAME_FLAGS.
AVColorPrimaries
Chromaticity coordinates of the source primaries.
unsigned int tmp_row_size
int ff_set_dimensions(AVCodecContext *s, int width, int height)
Check that the provided frame dimensions are valid and set them on the codec context.
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
#define FF_DEBUG_PICT_INFO
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Content light level needed by to transmit HDR over HDMI (CTA-861.3).
@ AV_PIX_FMT_GRAY16BE
Y , 16bpp, big-endian.
@ AV_STEREO3D_SIDEBYSIDE
Views are next to each other.
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
#define PNG_FILTER_TYPE_LOCO
AVCodec p
The public AVCodec.
@ AVCOL_TRC_IEC61966_2_1
IEC 61966-2-1 (sRGB or sYCC)
int ff_png_pass_row_size(int pass, int bits_per_pixel, int width)
enum AVDiscard skip_frame
Skip decoding for selected frames.
static void inflate(uint8_t *dst, const uint8_t *p1, int width, int threshold, const uint8_t *coordinates[], int coord, int maxc)
static av_cold int png_dec_end(AVCodecContext *avctx)
@ AVCOL_TRC_GAMMA28
also ITU-R BT470BG
enum PNGImageState pic_state
static int decode_idat_chunk(AVCodecContext *avctx, PNGDecContext *s, GetByteContext *gb, AVFrame *p)
static const uint8_t png_pass_dsp_ymask[NB_PASSES]
#define PNG_COLOR_TYPE_RGB_ALPHA
@ AVCOL_TRC_GAMMA22
also ITU-R BT470M / ITU-R BT1700 625 PAL & SECAM
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that's been allocated with av_malloc() or another memory allocation functio...
#define FF_CODEC_CAP_USES_PROGRESSFRAMES
The decoder might make use of the ProgressFrame API.
enum AVColorPrimaries color_primaries
Chromaticity coordinates of the source primaries.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
#define AV_FRAME_FLAG_KEY
A flag to mark frames that are keyframes.
#define YUV2RGB(NAME, TYPE)
static const uint16_t mask[17]
#define FF_CODEC_DECODE_CB(func)
@ AVCOL_PRI_NB
Not part of ABI.
const FFCodec ff_apng_decoder
#define AV_GET_BUFFER_FLAG_REF
The decoder will keep a reference to the frame and may reuse it later.
int ff_thread_get_buffer(AVCodecContext *avctx, AVFrame *f, int flags)
Wrapper around get_buffer() for frame-multithreaded codecs.
#define PNG_COLOR_TYPE_RGB
const FFCodec ff_png_decoder
#define AV_EF_IGNORE_ERR
ignore errors and continue
#define av_assert0(cond)
assert() equivalent, that is always enabled.
enum PNGHeaderState hdr_state
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
void ff_progress_frame_unref(ProgressFrame *f)
Give up a reference to the underlying frame contained in a ProgressFrame and reset the ProgressFrame,...
the pkt_dts and pkt_pts fields in AVFrame will work as usual Restrictions on codec whose streams don t reset across will not work because their bitstreams cannot be decoded in parallel *The contents of buffers must not be read before ff_progress_frame_await() has been called on them. reget_buffer() and buffer age optimizations no longer work. *The contents of buffers must not be written to after ff_progress_frame_report() has been called on them. This includes draw_edges(). Porting codecs to frame threading
static int percent_missing(PNGDecContext *s)
enum AVColorPrimaries av_csp_primaries_id_from_desc(const AVColorPrimariesDesc *prm)
Detects which enum AVColorPrimaries constant corresponds to the given complete gamut description.
#define CODEC_LONG_NAME(str)
@ AV_PIX_FMT_RGBA
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
int ff_decode_mastering_display_new(const AVCodecContext *avctx, AVFrame *frame, AVMasteringDisplayMetadata **mdm)
Wrapper around av_mastering_display_metadata_create_side_data(), which rejects side data overridden b...
int flags
Additional information about the frame packing.
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
@ AVDISCARD_ALL
discard all
@ AV_PIX_FMT_GRAY8A
alias for AV_PIX_FMT_YA8
enum AVColorPrimaries cicp_primaries
static int png_decode_idat(PNGDecContext *s, GetByteContext *gb, uint8_t *dst, ptrdiff_t dst_stride)
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
static av_cold int png_dec_init(AVCodecContext *avctx)
enum AVColorRange color_range
MPEG vs JPEG YUV range.
Rational number (pair of numerator and denominator).
@ APNG_DISPOSE_OP_PREVIOUS
@ AV_PIX_FMT_MONOBLACK
Y , 1bpp, 0 is black, 1 is white, in each byte pixels are ordered from the msb to the lsb.
@ AVCOL_PRI_BT709
also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP 177 Annex B
@ AV_PICTURE_TYPE_I
Intra.
@ AV_FRAME_DATA_ICC_PROFILE
The data contains an ICC profile as an opaque octet buffer following the format described by ISO 1507...
#define PNG_COLOR_TYPE_GRAY
#define UPDATE_THREAD_CONTEXT(func)
static int decode_sbit_chunk(AVCodecContext *avctx, PNGDecContext *s, GetByteContext *gb)
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
#define AV_EF_CRCCHECK
Verify checksums embedded in the bitstream (could be of either encoded or decoded data,...
static void apng_reset_background(PNGDecContext *s, const AVFrame *p)
@ AVCOL_RANGE_UNSPECIFIED
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
const uint8_t ff_png_pass_ymask[NB_PASSES]
static int output_frame(PNGDecContext *s, AVFrame *f)
static const uint8_t png_pass_mask[NB_PASSES]
static av_always_inline int bytestream2_get_bytes_left(GetByteContext *g)
static av_always_inline int bytestream2_tell(GetByteContext *g)
static void handle_small_bpp(PNGDecContext *s, AVFrame *p)
#define PNG_FILTER_VALUE_NONE
enum AVPictureType pict_type
Picture type of the frame.
int(* init)(AVBSFContext *ctx)
@ AV_PIX_FMT_RGB24
packed RGB 8:8:8, 24bpp, RGBRGB...
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
static void handle_p_frame_png(PNGDecContext *s, AVFrame *p)
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
int av_bprint_finalize(AVBPrint *buf, char **ret_str)
Finalize a print buffer.
int av_frame_copy(AVFrame *dst, const AVFrame *src)
Copy the frame data from src to dst.
static void png_put_interlaced_row(uint8_t *dst, int width, int bits_per_pixel, int pass, int color_type, const uint8_t *src)
@ AV_PIX_FMT_YA16BE
16 bits gray, 16 bits alpha (big-endian)
#define PNG_FILTER_VALUE_AVG
static AVRational av_make_q(int num, int den)
Create an AVRational.
int ff_frame_new_side_data(const AVCodecContext *avctx, AVFrame *frame, enum AVFrameSideDataType type, size_t size, AVFrameSideData **psd)
Wrapper around av_frame_new_side_data, which rejects side data overridden by the demuxer.
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
#define FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM
The decoder extracts and fills its parameters even if the frame is skipped due to the skip_frame sett...
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
#define PNG_FILTER_VALUE_PAETH
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_RL24
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames,...
#define PNG_FILTER_VALUE_UP
#define FF_COMPLIANCE_NORMAL
The reader does not expect b to be semantically here and if the code is changed by maybe adding a a division or other the signedness will almost certainly be mistaken To avoid this confusion a new type was SUINT is the C unsigned type but it holds a signed int to use the same example SUINT a
const AVCRC * av_crc_get_table(AVCRCId crc_id)
Get an initialized standard CRC table.
#define AVERROR_EXTERNAL
Generic error in an external library.
int flags
A combination of AV_PKT_FLAG values.
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values.
static int decode_trns_chunk(AVCodecContext *avctx, PNGDecContext *s, GetByteContext *gb)
#define AV_STEREO3D_FLAG_INVERT
Inverted views, Right/Bottom represents the left view.
static int populate_avctx_color_fields(AVCodecContext *avctx, AVFrame *frame)
#define FF_THREAD_FRAME
Decode more than one frame at once.
av_cold void ff_pngdsp_init(PNGDSPContext *dsp)
int av_image_get_linesize(enum AVPixelFormat pix_fmt, int width, int plane)
Compute the size of an image line with format pix_fmt and width width for the plane plane.
AVDictionary * frame_metadata
void(* add_bytes_l2)(uint8_t *dst, uint8_t *src1, uint8_t *src2, int w)
#define PNG_FILTER_VALUE_SUB
@ AV_PIX_FMT_RGB48BE
packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, the 2-byte value for each R/G/B component is stored as big...
#define i(width, name, range_min, range_max)
uint16_t mdvc_primaries[3][2]
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
uint32_t display_primaries[3][2]
void av_bprint_get_buffer(AVBPrint *buf, unsigned size, unsigned char **mem, unsigned *actual_size)
Allocate bytes in the buffer for external use.
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
static void png_handle_row(PNGDecContext *s, uint8_t *dst, ptrdiff_t dst_stride)
void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
Same behaviour av_fast_malloc but the buffer has additional AV_INPUT_BUFFER_PADDING_SIZE at the end w...
#define FF_DEBUG_STARTCODE
static int decode_fctl_chunk(AVCodecContext *avctx, PNGDecContext *s, GetByteContext *gb)
static int decode_plte_chunk(AVCodecContext *avctx, PNGDecContext *s, GetByteContext *gb)
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
const char * name
Name of the codec implementation.
void ff_inflate_end(FFZStream *zstream)
Wrapper around inflateEnd().
const uint8_t * buffer_end
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
#define AV_FRAME_FLAG_INTERLACED
A flag to mark frames whose content is interlaced.
@ AVCOL_RANGE_MPEG
Narrow or limited range content.
#define FF_CODEC_CAP_ICC_PROFILES
Codec supports embedded ICC profiles (AV_FRAME_DATA_ICC_PROFILE).
@ AV_PIX_FMT_PAL8
8 bits with AV_PIX_FMT_RGB32 palette
#define FFSWAP(type, a, b)
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
int strict_std_compliance
strictly follow the standard (MPEG-4, ...).
enum AVStereo3DType type
How views are packed within the video.
int ff_decode_content_light_new(const AVCodecContext *avctx, AVFrame *frame, AVContentLightMetadata **clm)
Wrapper around av_content_light_metadata_create_side_data(), which rejects side data overridden by th...
void av_bprintf(AVBPrint *buf, const char *fmt,...)
the pkt_dts and pkt_pts fields in AVFrame will work as usual Restrictions on codec whose streams don t reset across will not work because their bitstreams cannot be decoded in parallel *The contents of buffers must not be read before as well as code calling up to before the decode process starts Call ff_thread_finish_setup() afterwards. If some code can 't be moved
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
void ff_progress_frame_replace(ProgressFrame *dst, const ProgressFrame *src)
Do nothing if dst and src already refer to the same AVFrame; otherwise unreference dst and if src is ...
static char * iso88591_to_utf8(const char *in, size_t size_in)
void ff_png_filter_row(PNGDSPContext *dsp, uint8_t *dst, int filter_type, uint8_t *src, uint8_t *last, int size, int bpp)
main external API structure.
int active_thread_type
Which multithreading methods are in use by the codec.
static int decode_frame_common(AVCodecContext *avctx, PNGDecContext *s, AVFrame *p, const AVPacket *avpkt)
uint32_t av_crc(const AVCRC *ctx, uint32_t crc, const uint8_t *buffer, size_t length)
Calculate the CRC of a block.
#define UNROLL_FILTER(op)
ProgressFrame last_picture
uint8_t transparent_color_be[6]
the pkt_dts and pkt_pts fields in AVFrame will work as usual Restrictions on codec whose streams don t reset across will not work because their bitstreams cannot be decoded in parallel *The contents of buffers must not be read before as well as code calling up to before the decode process starts Call have update_thread_context() run it in the next thread. Add AV_CODEC_CAP_FRAME_THREADS to the codec capabilities. There will be very little speed gain at this point but it should work. Use ff_thread_get_buffer()(or ff_progress_frame_get_buffer() in case you have inter-frame dependencies and use the ProgressFrame API) to allocate frame buffers. Call ff_progress_frame_report() after some part of the current picture has decoded. A good place to put this is where draw_horiz_band() is called - add this if it isn 't called anywhere
void av_fast_padded_mallocz(void *ptr, unsigned int *size, size_t min_size)
Same behaviour av_fast_padded_malloc except that buffer will always be 0-initialized after call.
static const uint8_t png_pass_dsp_mask[NB_PASSES]
int discard_damaged_percentage
The percentage of damaged samples to discard a frame.
static int decode_iccp_chunk(PNGDecContext *s, GetByteContext *gb)
@ APNG_DISPOSE_OP_BACKGROUND
uint16_t mdvc_white_point[2]
static int decode_ihdr_chunk(AVCodecContext *avctx, PNGDecContext *s, GetByteContext *gb)
AVStereo3D * av_stereo3d_create_side_data(AVFrame *frame)
Allocate a complete AVFrameSideData and add it to the frame.
#define avpriv_request_sample(...)
Structure to hold side data for an AVFrame.
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
The ProgressFrame structure.
This structure stores compressed data.
unsigned MaxFALL
Max average light level per frame (cd/m^2).
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
int ff_inflate_init(FFZStream *zstream, void *logctx)
Wrapper around inflateInit().
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
int linesize[AV_NUM_DATA_POINTERS]
For video, a positive or negative value, which is typically indicating the size in bytes of each pict...
#define PNG_COLOR_TYPE_GRAY_ALPHA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
@ AVCOL_TRC_SMPTE428
SMPTE ST 428-1.
enum AVColorTransferCharacteristic cicp_trc
#define MKTAG(a, b, c, d)
Stereo 3D type: this structure describes how two videos are packed within a single video surface,...
static int handle_p_frame_apng(AVCodecContext *avctx, PNGDecContext *s, AVFrame *p)
int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
Check if the given dimension of an image is valid, meaning that all bytes of the image can be address...
AVColorRange
Visual content value range.
static int decode_zbuf(AVBPrint *bp, const uint8_t *data, const uint8_t *data_end, void *logctx)
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown) That is the width of a pixel divided by the height of the pixel.
#define PNG_COLOR_TYPE_PALETTE
#define AV_DICT_DONT_STRDUP_KEY
Take ownership of a key that's been allocated with av_malloc() or another memory allocation function.
const char * av_get_pix_fmt_name(enum AVPixelFormat pix_fmt)
Return the short name for a pixel format, NULL in case pix_fmt is unknown.
#define av_fourcc2str(fourcc)