2 * OpenEXR (.exr) image decoder
3 * Copyright (c) 2006 Industrial Light & Magic, a division of Lucas Digital Ltd. LLC
4 * Copyright (c) 2009 Jimmy Christensen
6 * B44/B44A, Tile, UINT32 added by Jokyo Images support by CNC - French National Center for Cinema
8 * This file is part of FFmpeg.
10 * FFmpeg is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
13 * version 2.1 of the License, or (at your option) any later version.
15 * FFmpeg is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Lesser General Public License for more details.
20 * You should have received a copy of the GNU Lesser General Public
21 * License along with FFmpeg; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
28 * @author Jimmy Christensen
30 * For more information on the OpenEXR format, visit:
33 * exr_half2float() is credited to Aaftab Munshi, Dan Ginsburg, Dave Shreiner.
39 #include "libavutil/avassert.h"
40 #include "libavutil/common.h"
41 #include "libavutil/imgutils.h"
42 #include "libavutil/intfloat.h"
43 #include "libavutil/avstring.h"
44 #include "libavutil/opt.h"
45 #include "libavutil/color_utils.h"
48 #include "bytestream.h"
81 enum ExrTileLevelMode {
83 EXR_TILE_LEVEL_MIPMAP,
84 EXR_TILE_LEVEL_RIPMAP,
85 EXR_TILE_LEVEL_UNKNOWN,
88 enum ExrTileLevelRound {
91 EXR_TILE_ROUND_UNKNOWN,
94 typedef struct EXRChannel {
96 enum ExrPixelType pixel_type;
99 typedef struct EXRTileAttribute {
102 enum ExrTileLevelMode level_mode;
103 enum ExrTileLevelRound level_round;
106 typedef struct EXRThreadData {
107 uint8_t *uncompressed_data;
108 int uncompressed_size;
118 int channel_line_size;
121 typedef struct EXRContext {
124 AVCodecContext *avctx;
128 BswapDSPContext bbdsp;
131 enum ExrCompr compression;
132 enum ExrPixelType pixel_type;
133 int channel_offsets[4]; // 0 = red, 1 = green, 2 = blue and 3 = alpha
134 const AVPixFmtDescriptor *desc;
139 uint32_t xdelta, ydelta;
141 int scan_lines_per_block;
143 EXRTileAttribute tile_attr; /* header data attribute of tile */
144 int is_tile; /* 0 if scanline, 1 if tile */
146 int is_luma;/* 1 if there is an Y plane */
152 EXRChannel *channels;
154 int current_channel_offset;
156 EXRThreadData *thread_data;
160 enum AVColorTransferCharacteristic apply_trc_type;
162 union av_intfloat32 gamma_table[65536];
165 /* -15 stored using a single precision bias of 127 */
166 #define HALF_FLOAT_MIN_BIASED_EXP_AS_SINGLE_FP_EXP 0x38000000
168 /* max exponent value in single precision that will be converted
169 * to Inf or Nan when stored as a half-float */
170 #define HALF_FLOAT_MAX_BIASED_EXP_AS_SINGLE_FP_EXP 0x47800000
172 /* 255 is the max exponent biased value */
173 #define FLOAT_MAX_BIASED_EXP (0xFF << 23)
175 #define HALF_FLOAT_MAX_BIASED_EXP (0x1F << 10)
178 * Convert a half float as a uint16_t into a full float.
180 * @param hf half float as uint16_t
182 * @return float value
184 static union av_intfloat32 exr_half2float(uint16_t hf)
186 unsigned int sign = (unsigned int) (hf >> 15);
187 unsigned int mantissa = (unsigned int) (hf & ((1 << 10) - 1));
188 unsigned int exp = (unsigned int) (hf & HALF_FLOAT_MAX_BIASED_EXP);
189 union av_intfloat32 f;
191 if (exp == HALF_FLOAT_MAX_BIASED_EXP) {
192 // we have a half-float NaN or Inf
193 // half-float NaNs will be converted to a single precision NaN
194 // half-float Infs will be converted to a single precision Inf
195 exp = FLOAT_MAX_BIASED_EXP;
197 mantissa = (1 << 23) - 1; // set all bits to indicate a NaN
198 } else if (exp == 0x0) {
199 // convert half-float zero/denorm to single precision value
202 exp = HALF_FLOAT_MIN_BIASED_EXP_AS_SINGLE_FP_EXP;
203 // check for leading 1 in denorm mantissa
204 while (!(mantissa & (1 << 10))) {
205 // for every leading 0, decrement single precision exponent by 1
206 // and shift half-float mantissa value to the left
210 // clamp the mantissa to 10 bits
211 mantissa &= ((1 << 10) - 1);
212 // shift left to generate single-precision mantissa of 23 bits
216 // shift left to generate single-precision mantissa of 23 bits
218 // generate single precision biased exponent value
219 exp = (exp << 13) + HALF_FLOAT_MIN_BIASED_EXP_AS_SINGLE_FP_EXP;
222 f.i = (sign << 31) | exp | mantissa;
227 static int zip_uncompress(EXRContext *s, const uint8_t *src, int compressed_size,
228 int uncompressed_size, EXRThreadData *td)
230 unsigned long dest_len = uncompressed_size;
232 if (uncompress(td->tmp, &dest_len, src, compressed_size) != Z_OK ||
233 dest_len != uncompressed_size)
234 return AVERROR_INVALIDDATA;
236 av_assert1(uncompressed_size % 2 == 0);
238 s->dsp.predictor(td->tmp, uncompressed_size);
239 s->dsp.reorder_pixels(td->uncompressed_data, td->tmp, uncompressed_size);
244 static int rle_uncompress(EXRContext *ctx, const uint8_t *src, int compressed_size,
245 int uncompressed_size, EXRThreadData *td)
247 uint8_t *d = td->tmp;
248 const int8_t *s = src;
249 int ssize = compressed_size;
250 int dsize = uncompressed_size;
251 uint8_t *dend = d + dsize;
260 if ((dsize -= count) < 0 ||
261 (ssize -= count + 1) < 0)
262 return AVERROR_INVALIDDATA;
269 if ((dsize -= count) < 0 ||
271 return AVERROR_INVALIDDATA;
281 return AVERROR_INVALIDDATA;
283 av_assert1(uncompressed_size % 2 == 0);
285 ctx->dsp.predictor(td->tmp, uncompressed_size);
286 ctx->dsp.reorder_pixels(td->uncompressed_data, td->tmp, uncompressed_size);
291 #define USHORT_RANGE (1 << 16)
292 #define BITMAP_SIZE (1 << 13)
294 static uint16_t reverse_lut(const uint8_t *bitmap, uint16_t *lut)
298 for (i = 0; i < USHORT_RANGE; i++)
299 if ((i == 0) || (bitmap[i >> 3] & (1 << (i & 7))))
304 memset(lut + k, 0, (USHORT_RANGE - k) * 2);
309 static void apply_lut(const uint16_t *lut, uint16_t *dst, int dsize)
313 for (i = 0; i < dsize; ++i)
314 dst[i] = lut[dst[i]];
317 #define HUF_ENCBITS 16 // literal (value) bit length
318 #define HUF_DECBITS 14 // decoding bit size (>= 8)
320 #define HUF_ENCSIZE ((1 << HUF_ENCBITS) + 1) // encoding table size
321 #define HUF_DECSIZE (1 << HUF_DECBITS) // decoding table size
322 #define HUF_DECMASK (HUF_DECSIZE - 1)
324 typedef struct HufDec {
330 static void huf_canonical_code_table(uint64_t *hcode)
332 uint64_t c, n[59] = { 0 };
335 for (i = 0; i < HUF_ENCSIZE; ++i)
339 for (i = 58; i > 0; --i) {
340 uint64_t nc = ((c + n[i]) >> 1);
345 for (i = 0; i < HUF_ENCSIZE; ++i) {
349 hcode[i] = l | (n[l]++ << 6);
353 #define SHORT_ZEROCODE_RUN 59
354 #define LONG_ZEROCODE_RUN 63
355 #define SHORTEST_LONG_RUN (2 + LONG_ZEROCODE_RUN - SHORT_ZEROCODE_RUN)
356 #define LONGEST_LONG_RUN (255 + SHORTEST_LONG_RUN)
358 static int huf_unpack_enc_table(GetByteContext *gb,
359 int32_t im, int32_t iM, uint64_t *hcode)
362 int ret = init_get_bits8(&gbit, gb->buffer, bytestream2_get_bytes_left(gb));
366 for (; im <= iM; im++) {
367 uint64_t l = hcode[im] = get_bits(&gbit, 6);
369 if (l == LONG_ZEROCODE_RUN) {
370 int zerun = get_bits(&gbit, 8) + SHORTEST_LONG_RUN;
372 if (im + zerun > iM + 1)
373 return AVERROR_INVALIDDATA;
379 } else if (l >= SHORT_ZEROCODE_RUN) {
380 int zerun = l - SHORT_ZEROCODE_RUN + 2;
382 if (im + zerun > iM + 1)
383 return AVERROR_INVALIDDATA;
392 bytestream2_skip(gb, (get_bits_count(&gbit) + 7) / 8);
393 huf_canonical_code_table(hcode);
398 static int huf_build_dec_table(const uint64_t *hcode, int im,
399 int iM, HufDec *hdecod)
401 for (; im <= iM; im++) {
402 uint64_t c = hcode[im] >> 6;
403 int i, l = hcode[im] & 63;
406 return AVERROR_INVALIDDATA;
408 if (l > HUF_DECBITS) {
409 HufDec *pl = hdecod + (c >> (l - HUF_DECBITS));
411 return AVERROR_INVALIDDATA;
415 pl->p = av_realloc(pl->p, pl->lit * sizeof(int));
417 return AVERROR(ENOMEM);
419 pl->p[pl->lit - 1] = im;
421 HufDec *pl = hdecod + (c << (HUF_DECBITS - l));
423 for (i = 1 << (HUF_DECBITS - l); i > 0; i--, pl++) {
424 if (pl->len || pl->p)
425 return AVERROR_INVALIDDATA;
435 #define get_char(c, lc, gb) \
437 c = (c << 8) | bytestream2_get_byte(gb); \
441 #define get_code(po, rlc, c, lc, gb, out, oe, outb) \
445 get_char(c, lc, gb); \
450 if (out + cs > oe || out == outb) \
451 return AVERROR_INVALIDDATA; \
457 } else if (out < oe) { \
460 return AVERROR_INVALIDDATA; \
464 static int huf_decode(const uint64_t *hcode, const HufDec *hdecod,
465 GetByteContext *gb, int nbits,
466 int rlc, int no, uint16_t *out)
469 uint16_t *outb = out;
470 uint16_t *oe = out + no;
471 const uint8_t *ie = gb->buffer + (nbits + 7) / 8; // input byte size
476 while (gb->buffer < ie) {
479 while (lc >= HUF_DECBITS) {
480 const HufDec pl = hdecod[(c >> (lc - HUF_DECBITS)) & HUF_DECMASK];
484 get_code(pl.lit, rlc, c, lc, gb, out, oe, outb);
489 return AVERROR_INVALIDDATA;
491 for (j = 0; j < pl.lit; j++) {
492 int l = hcode[pl.p[j]] & 63;
494 while (lc < l && bytestream2_get_bytes_left(gb) > 0)
498 if ((hcode[pl.p[j]] >> 6) ==
499 ((c >> (lc - l)) & ((1LL << l) - 1))) {
501 get_code(pl.p[j], rlc, c, lc, gb, out, oe, outb);
508 return AVERROR_INVALIDDATA;
518 const HufDec pl = hdecod[(c << (HUF_DECBITS - lc)) & HUF_DECMASK];
520 if (pl.len && lc >= pl.len) {
522 get_code(pl.lit, rlc, c, lc, gb, out, oe, outb);
524 return AVERROR_INVALIDDATA;
528 if (out - outb != no)
529 return AVERROR_INVALIDDATA;
533 static int huf_uncompress(GetByteContext *gb,
534 uint16_t *dst, int dst_size)
536 int32_t src_size, im, iM;
542 src_size = bytestream2_get_le32(gb);
543 im = bytestream2_get_le32(gb);
544 iM = bytestream2_get_le32(gb);
545 bytestream2_skip(gb, 4);
546 nBits = bytestream2_get_le32(gb);
547 if (im < 0 || im >= HUF_ENCSIZE ||
548 iM < 0 || iM >= HUF_ENCSIZE ||
550 return AVERROR_INVALIDDATA;
552 bytestream2_skip(gb, 4);
554 freq = av_mallocz_array(HUF_ENCSIZE, sizeof(*freq));
555 hdec = av_mallocz_array(HUF_DECSIZE, sizeof(*hdec));
556 if (!freq || !hdec) {
557 ret = AVERROR(ENOMEM);
561 if ((ret = huf_unpack_enc_table(gb, im, iM, freq)) < 0)
564 if (nBits > 8 * bytestream2_get_bytes_left(gb)) {
565 ret = AVERROR_INVALIDDATA;
569 if ((ret = huf_build_dec_table(freq, im, iM, hdec)) < 0)
571 ret = huf_decode(freq, hdec, gb, nBits, iM, dst_size, dst);
574 for (i = 0; i < HUF_DECSIZE; i++)
576 av_freep(&hdec[i].p);
584 static inline void wdec14(uint16_t l, uint16_t h, uint16_t *a, uint16_t *b)
589 int ai = ls + (hi & 1) + (hi >> 1);
591 int16_t bs = ai - hi;
598 #define A_OFFSET (1 << (NBITS - 1))
599 #define MOD_MASK ((1 << NBITS) - 1)
601 static inline void wdec16(uint16_t l, uint16_t h, uint16_t *a, uint16_t *b)
605 int bb = (m - (d >> 1)) & MOD_MASK;
606 int aa = (d + bb - A_OFFSET) & MOD_MASK;
611 static void wav_decode(uint16_t *in, int nx, int ox,
612 int ny, int oy, uint16_t mx)
614 int w14 = (mx < (1 << 14));
615 int n = (nx > ny) ? ny : nx;
628 uint16_t *ey = in + oy * (ny - p2);
629 uint16_t i00, i01, i10, i11;
635 for (; py <= ey; py += oy2) {
637 uint16_t *ex = py + ox * (nx - p2);
639 for (; px <= ex; px += ox2) {
640 uint16_t *p01 = px + ox1;
641 uint16_t *p10 = px + oy1;
642 uint16_t *p11 = p10 + ox1;
645 wdec14(*px, *p10, &i00, &i10);
646 wdec14(*p01, *p11, &i01, &i11);
647 wdec14(i00, i01, px, p01);
648 wdec14(i10, i11, p10, p11);
650 wdec16(*px, *p10, &i00, &i10);
651 wdec16(*p01, *p11, &i01, &i11);
652 wdec16(i00, i01, px, p01);
653 wdec16(i10, i11, p10, p11);
658 uint16_t *p10 = px + oy1;
661 wdec14(*px, *p10, &i00, p10);
663 wdec16(*px, *p10, &i00, p10);
671 uint16_t *ex = py + ox * (nx - p2);
673 for (; px <= ex; px += ox2) {
674 uint16_t *p01 = px + ox1;
677 wdec14(*px, *p01, &i00, p01);
679 wdec16(*px, *p01, &i00, p01);
690 static int piz_uncompress(EXRContext *s, const uint8_t *src, int ssize,
691 int dsize, EXRThreadData *td)
694 uint16_t maxval, min_non_zero, max_non_zero;
696 uint16_t *tmp = (uint16_t *)td->tmp;
700 int pixel_half_size;/* 1 for half, 2 for float and uint32 */
705 td->bitmap = av_malloc(BITMAP_SIZE);
707 td->lut = av_malloc(1 << 17);
708 if (!td->bitmap || !td->lut) {
709 av_freep(&td->bitmap);
711 return AVERROR(ENOMEM);
714 bytestream2_init(&gb, src, ssize);
715 min_non_zero = bytestream2_get_le16(&gb);
716 max_non_zero = bytestream2_get_le16(&gb);
718 if (max_non_zero >= BITMAP_SIZE)
719 return AVERROR_INVALIDDATA;
721 memset(td->bitmap, 0, FFMIN(min_non_zero, BITMAP_SIZE));
722 if (min_non_zero <= max_non_zero)
723 bytestream2_get_buffer(&gb, td->bitmap + min_non_zero,
724 max_non_zero - min_non_zero + 1);
725 memset(td->bitmap + max_non_zero + 1, 0, BITMAP_SIZE - max_non_zero - 1);
727 maxval = reverse_lut(td->bitmap, td->lut);
729 ret = huf_uncompress(&gb, tmp, dsize / sizeof(uint16_t));
734 for (i = 0; i < s->nb_channels; i++) {
735 channel = &s->channels[i];
737 if (channel->pixel_type == EXR_HALF)
742 for (j = 0; j < pixel_half_size; j++)
743 wav_decode(ptr + j, td->xsize, pixel_half_size, td->ysize,
744 td->xsize * pixel_half_size, maxval);
745 ptr += td->xsize * td->ysize * pixel_half_size;
748 apply_lut(td->lut, tmp, dsize / sizeof(uint16_t));
750 out = (uint16_t *)td->uncompressed_data;
751 for (i = 0; i < td->ysize; i++) {
753 for (j = 0; j < s->nb_channels; j++) {
754 channel = &s->channels[j];
755 if (channel->pixel_type == EXR_HALF)
760 in = tmp + tmp_offset * td->xsize * td->ysize + i * td->xsize * pixel_half_size;
761 tmp_offset += pixel_half_size;
764 s->bbdsp.bswap16_buf(out, in, td->xsize * pixel_half_size);
766 memcpy(out, in, td->xsize * 2 * pixel_half_size);
768 out += td->xsize * pixel_half_size;
775 static int pxr24_uncompress(EXRContext *s, const uint8_t *src,
776 int compressed_size, int uncompressed_size,
779 unsigned long dest_len, expected_len = 0;
780 const uint8_t *in = td->tmp;
784 for (i = 0; i < s->nb_channels; i++) {
785 if (s->channels[i].pixel_type == EXR_FLOAT) {
786 expected_len += (td->xsize * td->ysize * 3);/* PRX 24 store float in 24 bit instead of 32 */
787 } else if (s->channels[i].pixel_type == EXR_HALF) {
788 expected_len += (td->xsize * td->ysize * 2);
790 expected_len += (td->xsize * td->ysize * 4);
794 dest_len = expected_len;
796 if (uncompress(td->tmp, &dest_len, src, compressed_size) != Z_OK) {
797 return AVERROR_INVALIDDATA;
798 } else if (dest_len != expected_len) {
799 return AVERROR_INVALIDDATA;
802 out = td->uncompressed_data;
803 for (i = 0; i < td->ysize; i++)
804 for (c = 0; c < s->nb_channels; c++) {
805 EXRChannel *channel = &s->channels[c];
806 const uint8_t *ptr[4];
809 switch (channel->pixel_type) {
812 ptr[1] = ptr[0] + td->xsize;
813 ptr[2] = ptr[1] + td->xsize;
814 in = ptr[2] + td->xsize;
816 for (j = 0; j < td->xsize; ++j) {
817 uint32_t diff = ((unsigned)*(ptr[0]++) << 24) |
818 (*(ptr[1]++) << 16) |
821 bytestream_put_le32(&out, pixel);
826 ptr[1] = ptr[0] + td->xsize;
827 in = ptr[1] + td->xsize;
828 for (j = 0; j < td->xsize; j++) {
829 uint32_t diff = (*(ptr[0]++) << 8) | *(ptr[1]++);
832 bytestream_put_le16(&out, pixel);
837 ptr[1] = ptr[0] + s->xdelta;
838 ptr[2] = ptr[1] + s->xdelta;
839 ptr[3] = ptr[2] + s->xdelta;
840 in = ptr[3] + s->xdelta;
842 for (j = 0; j < s->xdelta; ++j) {
843 uint32_t diff = ((uint32_t)*(ptr[0]++) << 24) |
844 (*(ptr[1]++) << 16) |
845 (*(ptr[2]++) << 8 ) |
848 bytestream_put_le32(&out, pixel);
852 return AVERROR_INVALIDDATA;
859 static void unpack_14(const uint8_t b[14], uint16_t s[16])
861 unsigned short shift = (b[ 2] >> 2) & 15;
862 unsigned short bias = (0x20 << shift);
865 s[ 0] = (b[0] << 8) | b[1];
867 s[ 4] = s[ 0] + ((((b[ 2] << 4) | (b[ 3] >> 4)) & 0x3f) << shift) - bias;
868 s[ 8] = s[ 4] + ((((b[ 3] << 2) | (b[ 4] >> 6)) & 0x3f) << shift) - bias;
869 s[12] = s[ 8] + ((b[ 4] & 0x3f) << shift) - bias;
871 s[ 1] = s[ 0] + ((b[ 5] >> 2) << shift) - bias;
872 s[ 5] = s[ 4] + ((((b[ 5] << 4) | (b[ 6] >> 4)) & 0x3f) << shift) - bias;
873 s[ 9] = s[ 8] + ((((b[ 6] << 2) | (b[ 7] >> 6)) & 0x3f) << shift) - bias;
874 s[13] = s[12] + ((b[ 7] & 0x3f) << shift) - bias;
876 s[ 2] = s[ 1] + ((b[ 8] >> 2) << shift) - bias;
877 s[ 6] = s[ 5] + ((((b[ 8] << 4) | (b[ 9] >> 4)) & 0x3f) << shift) - bias;
878 s[10] = s[ 9] + ((((b[ 9] << 2) | (b[10] >> 6)) & 0x3f) << shift) - bias;
879 s[14] = s[13] + ((b[10] & 0x3f) << shift) - bias;
881 s[ 3] = s[ 2] + ((b[11] >> 2) << shift) - bias;
882 s[ 7] = s[ 6] + ((((b[11] << 4) | (b[12] >> 4)) & 0x3f) << shift) - bias;
883 s[11] = s[10] + ((((b[12] << 2) | (b[13] >> 6)) & 0x3f) << shift) - bias;
884 s[15] = s[14] + ((b[13] & 0x3f) << shift) - bias;
886 for (i = 0; i < 16; ++i) {
894 static void unpack_3(const uint8_t b[3], uint16_t s[16])
898 s[0] = (b[0] << 8) | b[1];
905 for (i = 1; i < 16; i++)
910 static int b44_uncompress(EXRContext *s, const uint8_t *src, int compressed_size,
911 int uncompressed_size, EXRThreadData *td) {
912 const int8_t *sr = src;
913 int stay_to_uncompress = compressed_size;
914 int nb_b44_block_w, nb_b44_block_h;
915 int index_tl_x, index_tl_y, index_out, index_tmp;
916 uint16_t tmp_buffer[16]; /* B44 use 4x4 half float pixel */
918 int target_channel_offset = 0;
920 /* calc B44 block count */
921 nb_b44_block_w = td->xsize / 4;
922 if ((td->xsize % 4) != 0)
925 nb_b44_block_h = td->ysize / 4;
926 if ((td->ysize % 4) != 0)
929 for (c = 0; c < s->nb_channels; c++) {
930 if (s->channels[c].pixel_type == EXR_HALF) {/* B44 only compress half float data */
931 for (iY = 0; iY < nb_b44_block_h; iY++) {
932 for (iX = 0; iX < nb_b44_block_w; iX++) {/* For each B44 block */
933 if (stay_to_uncompress < 3) {
934 av_log(s, AV_LOG_ERROR, "Not enough data for B44A block: %d", stay_to_uncompress);
935 return AVERROR_INVALIDDATA;
938 if (src[compressed_size - stay_to_uncompress + 2] == 0xfc) { /* B44A block */
939 unpack_3(sr, tmp_buffer);
941 stay_to_uncompress -= 3;
942 } else {/* B44 Block */
943 if (stay_to_uncompress < 14) {
944 av_log(s, AV_LOG_ERROR, "Not enough data for B44 block: %d", stay_to_uncompress);
945 return AVERROR_INVALIDDATA;
947 unpack_14(sr, tmp_buffer);
949 stay_to_uncompress -= 14;
952 /* copy data to uncompress buffer (B44 block can exceed target resolution)*/
956 for (y = index_tl_y; y < FFMIN(index_tl_y + 4, td->ysize); y++) {
957 for (x = index_tl_x; x < FFMIN(index_tl_x + 4, td->xsize); x++) {
958 index_out = target_channel_offset * td->xsize + y * td->channel_line_size + 2 * x;
959 index_tmp = (y-index_tl_y) * 4 + (x-index_tl_x);
960 td->uncompressed_data[index_out] = tmp_buffer[index_tmp] & 0xff;
961 td->uncompressed_data[index_out + 1] = tmp_buffer[index_tmp] >> 8;
966 target_channel_offset += 2;
967 } else {/* Float or UINT 32 channel */
968 if (stay_to_uncompress < td->ysize * td->xsize * 4) {
969 av_log(s, AV_LOG_ERROR, "Not enough data for uncompress channel: %d", stay_to_uncompress);
970 return AVERROR_INVALIDDATA;
973 for (y = 0; y < td->ysize; y++) {
974 index_out = target_channel_offset * td->xsize + y * td->channel_line_size;
975 memcpy(&td->uncompressed_data[index_out], sr, td->xsize * 4);
978 target_channel_offset += 4;
980 stay_to_uncompress -= td->ysize * td->xsize * 4;
987 static int decode_block(AVCodecContext *avctx, void *tdata,
988 int jobnr, int threadnr)
990 EXRContext *s = avctx->priv_data;
991 AVFrame *const p = s->picture;
992 EXRThreadData *td = &s->thread_data[threadnr];
993 const uint8_t *channel_buffer[4] = { 0 };
994 const uint8_t *buf = s->buf;
995 uint64_t line_offset, uncompressed_size;
999 uint64_t tile_x, tile_y, tile_level_x, tile_level_y;
1001 int step = s->desc->flags & AV_PIX_FMT_FLAG_FLOAT ? 4 : 2 * s->desc->nb_components;
1002 int bxmin = 0, axmax = 0, window_xoffset = 0;
1003 int window_xmin, window_xmax, window_ymin, window_ymax;
1004 int data_xoffset, data_yoffset, data_window_offset, xsize, ysize;
1005 int i, x, buf_size = s->buf_size;
1006 int c, rgb_channel_count;
1007 float one_gamma = 1.0f / s->gamma;
1008 avpriv_trc_function trc_func = avpriv_get_trc_function_from_trc(s->apply_trc_type);
1011 line_offset = AV_RL64(s->gb.buffer + jobnr * 8);
1014 if (buf_size < 20 || line_offset > buf_size - 20)
1015 return AVERROR_INVALIDDATA;
1017 src = buf + line_offset + 20;
1019 tile_x = AV_RL32(src - 20);
1020 tile_y = AV_RL32(src - 16);
1021 tile_level_x = AV_RL32(src - 12);
1022 tile_level_y = AV_RL32(src - 8);
1024 data_size = AV_RL32(src - 4);
1025 if (data_size <= 0 || data_size > buf_size - line_offset - 20)
1026 return AVERROR_INVALIDDATA;
1028 if (tile_level_x || tile_level_y) { /* tile level, is not the full res level */
1029 avpriv_report_missing_feature(s->avctx, "Subres tile before full res tile");
1030 return AVERROR_PATCHWELCOME;
1033 line = s->ymin + s->tile_attr.ySize * tile_y;
1034 col = s->tile_attr.xSize * tile_x;
1036 if (line < s->ymin || line > s->ymax ||
1037 s->xmin + col < s->xmin || s->xmin + col > s->xmax)
1038 return AVERROR_INVALIDDATA;
1040 td->ysize = FFMIN(s->tile_attr.ySize, s->ydelta - tile_y * s->tile_attr.ySize);
1041 td->xsize = FFMIN(s->tile_attr.xSize, s->xdelta - tile_x * s->tile_attr.xSize);
1043 td->channel_line_size = td->xsize * s->current_channel_offset;/* uncompress size of one line */
1044 uncompressed_size = td->channel_line_size * (uint64_t)td->ysize;/* uncompress size of the block */
1046 if (buf_size < 8 || line_offset > buf_size - 8)
1047 return AVERROR_INVALIDDATA;
1049 src = buf + line_offset + 8;
1050 line = AV_RL32(src - 8);
1052 if (line < s->ymin || line > s->ymax)
1053 return AVERROR_INVALIDDATA;
1055 data_size = AV_RL32(src - 4);
1056 if (data_size <= 0 || data_size > buf_size - line_offset - 8)
1057 return AVERROR_INVALIDDATA;
1059 td->ysize = FFMIN(s->scan_lines_per_block, s->ymax - line + 1); /* s->ydelta - line ?? */
1060 td->xsize = s->xdelta;
1062 td->channel_line_size = td->xsize * s->current_channel_offset;/* uncompress size of one line */
1063 uncompressed_size = td->channel_line_size * (uint64_t)td->ysize;/* uncompress size of the block */
1065 if ((s->compression == EXR_RAW && (data_size != uncompressed_size ||
1066 line_offset > buf_size - uncompressed_size)) ||
1067 (s->compression != EXR_RAW && (data_size > uncompressed_size ||
1068 line_offset > buf_size - data_size))) {
1069 return AVERROR_INVALIDDATA;
1073 window_xmin = FFMIN(avctx->width, FFMAX(0, s->xmin + col));
1074 window_xmax = FFMIN(avctx->width, FFMAX(0, s->xmin + col + td->xsize));
1075 window_ymin = FFMIN(avctx->height, FFMAX(0, line ));
1076 window_ymax = FFMIN(avctx->height, FFMAX(0, line + td->ysize));
1077 xsize = window_xmax - window_xmin;
1078 ysize = window_ymax - window_ymin;
1080 /* tile or scanline not visible skip decoding */
1081 if (xsize <= 0 || ysize <= 0)
1084 /* is the first tile or is a scanline */
1087 /* pixels to add at the left of the display window */
1088 window_xoffset = FFMAX(0, s->xmin);
1089 /* bytes to add at the left of the display window */
1090 bxmin = window_xoffset * step;
1093 /* is the last tile or is a scanline */
1094 if(col + td->xsize == s->xdelta) {
1095 window_xmax = avctx->width;
1096 /* bytes to add at the right of the display window */
1097 axmax = FFMAX(0, (avctx->width - (s->xmax + 1))) * step;
1100 if (data_size < uncompressed_size || s->is_tile) { /* td->tmp is use for tile reorganization */
1101 av_fast_padded_malloc(&td->tmp, &td->tmp_size, uncompressed_size);
1103 return AVERROR(ENOMEM);
1106 if (data_size < uncompressed_size) {
1107 av_fast_padded_malloc(&td->uncompressed_data,
1108 &td->uncompressed_size, uncompressed_size + 64);/* Force 64 padding for AVX2 reorder_pixels dst */
1110 if (!td->uncompressed_data)
1111 return AVERROR(ENOMEM);
1113 ret = AVERROR_INVALIDDATA;
1114 switch (s->compression) {
1117 ret = zip_uncompress(s, src, data_size, uncompressed_size, td);
1120 ret = piz_uncompress(s, src, data_size, uncompressed_size, td);
1123 ret = pxr24_uncompress(s, src, data_size, uncompressed_size, td);
1126 ret = rle_uncompress(s, src, data_size, uncompressed_size, td);
1130 ret = b44_uncompress(s, src, data_size, uncompressed_size, td);
1134 av_log(avctx, AV_LOG_ERROR, "decode_block() failed.\n");
1137 src = td->uncompressed_data;
1140 /* offsets to crop data outside display window */
1141 data_xoffset = FFABS(FFMIN(0, s->xmin + col)) * (s->pixel_type == EXR_HALF ? 2 : 4);
1142 data_yoffset = FFABS(FFMIN(0, line));
1143 data_window_offset = (data_yoffset * td->channel_line_size) + data_xoffset;
1146 channel_buffer[0] = src + (td->xsize * s->channel_offsets[0]) + data_window_offset;
1147 channel_buffer[1] = src + (td->xsize * s->channel_offsets[1]) + data_window_offset;
1148 channel_buffer[2] = src + (td->xsize * s->channel_offsets[2]) + data_window_offset;
1149 rgb_channel_count = 3;
1150 } else { /* put y data in the first channel_buffer */
1151 channel_buffer[0] = src + (td->xsize * s->channel_offsets[1]) + data_window_offset;
1152 rgb_channel_count = 1;
1154 if (s->channel_offsets[3] >= 0)
1155 channel_buffer[3] = src + (td->xsize * s->channel_offsets[3]) + data_window_offset;
1157 if (s->desc->flags & AV_PIX_FMT_FLAG_FLOAT) {
1159 /* todo: change this when a floating point pixel format with luma with alpha is implemented */
1160 int channel_count = s->channel_offsets[3] >= 0 ? 4 : rgb_channel_count;
1162 channel_buffer[1] = channel_buffer[0];
1163 channel_buffer[2] = channel_buffer[0];
1166 for (c = 0; c < channel_count; c++) {
1167 int plane = s->desc->comp[c].plane;
1168 ptr = p->data[plane] + window_ymin * p->linesize[plane] + (window_xmin * 4);
1170 for (i = 0; i < ysize; i++, ptr += p->linesize[plane]) {
1172 union av_intfloat32 *ptr_x;
1174 src = channel_buffer[c];
1175 ptr_x = (union av_intfloat32 *)ptr;
1177 // Zero out the start if xmin is not 0
1178 memset(ptr_x, 0, bxmin);
1179 ptr_x += window_xoffset;
1181 if (s->pixel_type == EXR_FLOAT) {
1183 union av_intfloat32 t;
1184 if (trc_func && c < 3) {
1185 for (x = 0; x < xsize; x++) {
1186 t.i = bytestream_get_le32(&src);
1187 t.f = trc_func(t.f);
1191 for (x = 0; x < xsize; x++) {
1192 t.i = bytestream_get_le32(&src);
1193 if (t.f > 0.0f && c < 3) /* avoid negative values */
1194 t.f = powf(t.f, one_gamma);
1198 } else if (s->pixel_type == EXR_HALF) {
1201 for (x = 0; x < xsize; x++) {
1202 *ptr_x++ = s->gamma_table[bytestream_get_le16(&src)];
1205 for (x = 0; x < xsize; x++) {
1206 *ptr_x++ = exr_half2float(bytestream_get_le16(&src));;
1211 // Zero out the end if xmax+1 is not w
1212 memset(ptr_x, 0, axmax);
1213 channel_buffer[c] += td->channel_line_size;
1218 av_assert1(s->pixel_type == EXR_UINT);
1219 ptr = p->data[0] + window_ymin * p->linesize[0] + (window_xmin * s->desc->nb_components * 2);
1221 for (i = 0; i < ysize; i++, ptr += p->linesize[0]) {
1224 const uint8_t *rgb[3];
1227 for (c = 0; c < rgb_channel_count; c++) {
1228 rgb[c] = channel_buffer[c];
1231 if (channel_buffer[3])
1232 a = channel_buffer[3];
1234 ptr_x = (uint16_t *) ptr;
1236 // Zero out the start if xmin is not 0
1237 memset(ptr_x, 0, bxmin);
1238 ptr_x += window_xoffset * s->desc->nb_components;
1240 for (x = 0; x < xsize; x++) {
1241 for (c = 0; c < rgb_channel_count; c++) {
1242 *ptr_x++ = bytestream_get_le32(&rgb[c]) >> 16;
1245 if (channel_buffer[3])
1246 *ptr_x++ = bytestream_get_le32(&a) >> 16;
1249 // Zero out the end if xmax+1 is not w
1250 memset(ptr_x, 0, axmax);
1252 channel_buffer[0] += td->channel_line_size;
1253 channel_buffer[1] += td->channel_line_size;
1254 channel_buffer[2] += td->channel_line_size;
1255 if (channel_buffer[3])
1256 channel_buffer[3] += td->channel_line_size;
1264 * Check if the variable name corresponds to its data type.
1266 * @param s the EXRContext
1267 * @param value_name name of the variable to check
1268 * @param value_type type of the variable to check
1269 * @param minimum_length minimum length of the variable data
1271 * @return bytes to read containing variable data
1272 * -1 if variable is not found
1273 * 0 if buffer ended prematurely
1275 static int check_header_variable(EXRContext *s,
1276 const char *value_name,
1277 const char *value_type,
1278 unsigned int minimum_length)
1282 if (bytestream2_get_bytes_left(&s->gb) >= minimum_length &&
1283 !strcmp(s->gb.buffer, value_name)) {
1284 // found value_name, jump to value_type (null terminated strings)
1285 s->gb.buffer += strlen(value_name) + 1;
1286 if (!strcmp(s->gb.buffer, value_type)) {
1287 s->gb.buffer += strlen(value_type) + 1;
1288 var_size = bytestream2_get_le32(&s->gb);
1289 // don't go read past boundaries
1290 if (var_size > bytestream2_get_bytes_left(&s->gb))
1293 // value_type not found, reset the buffer
1294 s->gb.buffer -= strlen(value_name) + 1;
1295 av_log(s->avctx, AV_LOG_WARNING,
1296 "Unknown data type %s for header variable %s.\n",
1297 value_type, value_name);
1304 static int decode_header(EXRContext *s, AVFrame *frame)
1306 AVDictionary *metadata = NULL;
1307 int magic_number, version, i, flags, sar = 0;
1308 int layer_match = 0;
1310 int dup_channels = 0;
1312 s->current_channel_offset = 0;
1319 s->channel_offsets[0] = -1;
1320 s->channel_offsets[1] = -1;
1321 s->channel_offsets[2] = -1;
1322 s->channel_offsets[3] = -1;
1323 s->pixel_type = EXR_UNKNOWN;
1324 s->compression = EXR_UNKN;
1328 s->tile_attr.xSize = -1;
1329 s->tile_attr.ySize = -1;
1333 if (bytestream2_get_bytes_left(&s->gb) < 10) {
1334 av_log(s->avctx, AV_LOG_ERROR, "Header too short to parse.\n");
1335 return AVERROR_INVALIDDATA;
1338 magic_number = bytestream2_get_le32(&s->gb);
1339 if (magic_number != 20000630) {
1340 /* As per documentation of OpenEXR, it is supposed to be
1341 * int 20000630 little-endian */
1342 av_log(s->avctx, AV_LOG_ERROR, "Wrong magic number %d.\n", magic_number);
1343 return AVERROR_INVALIDDATA;
1346 version = bytestream2_get_byte(&s->gb);
1348 avpriv_report_missing_feature(s->avctx, "Version %d", version);
1349 return AVERROR_PATCHWELCOME;
1352 flags = bytestream2_get_le24(&s->gb);
1357 avpriv_report_missing_feature(s->avctx, "deep data");
1358 return AVERROR_PATCHWELCOME;
1361 avpriv_report_missing_feature(s->avctx, "multipart");
1362 return AVERROR_PATCHWELCOME;
1366 while (bytestream2_get_bytes_left(&s->gb) > 0 && *s->gb.buffer) {
1368 if ((var_size = check_header_variable(s, "channels",
1369 "chlist", 38)) >= 0) {
1370 GetByteContext ch_gb;
1372 ret = AVERROR_INVALIDDATA;
1376 bytestream2_init(&ch_gb, s->gb.buffer, var_size);
1378 while (bytestream2_get_bytes_left(&ch_gb) >= 19) {
1379 EXRChannel *channel;
1380 enum ExrPixelType current_pixel_type;
1381 int channel_index = -1;
1384 if (strcmp(s->layer, "") != 0) {
1385 if (strncmp(ch_gb.buffer, s->layer, strlen(s->layer)) == 0) {
1387 av_log(s->avctx, AV_LOG_INFO,
1388 "Channel match layer : %s.\n", ch_gb.buffer);
1389 ch_gb.buffer += strlen(s->layer);
1390 if (*ch_gb.buffer == '.')
1391 ch_gb.buffer++; /* skip dot if not given */
1394 av_log(s->avctx, AV_LOG_INFO,
1395 "Channel doesn't match layer : %s.\n", ch_gb.buffer);
1401 if (layer_match) { /* only search channel if the layer match is valid */
1402 if (!av_strcasecmp(ch_gb.buffer, "R") ||
1403 !av_strcasecmp(ch_gb.buffer, "X") ||
1404 !av_strcasecmp(ch_gb.buffer, "U")) {
1407 } else if (!av_strcasecmp(ch_gb.buffer, "G") ||
1408 !av_strcasecmp(ch_gb.buffer, "V")) {
1411 } else if (!av_strcasecmp(ch_gb.buffer, "Y")) {
1414 } else if (!av_strcasecmp(ch_gb.buffer, "B") ||
1415 !av_strcasecmp(ch_gb.buffer, "Z") ||
1416 !av_strcasecmp(ch_gb.buffer, "W")) {
1419 } else if (!av_strcasecmp(ch_gb.buffer, "A")) {
1422 av_log(s->avctx, AV_LOG_WARNING,
1423 "Unsupported channel %.256s.\n", ch_gb.buffer);
1427 /* skip until you get a 0 */
1428 while (bytestream2_get_bytes_left(&ch_gb) > 0 &&
1429 bytestream2_get_byte(&ch_gb))
1432 if (bytestream2_get_bytes_left(&ch_gb) < 4) {
1433 av_log(s->avctx, AV_LOG_ERROR, "Incomplete header.\n");
1434 ret = AVERROR_INVALIDDATA;
1438 current_pixel_type = bytestream2_get_le32(&ch_gb);
1439 if (current_pixel_type >= EXR_UNKNOWN) {
1440 avpriv_report_missing_feature(s->avctx, "Pixel type %d",
1441 current_pixel_type);
1442 ret = AVERROR_PATCHWELCOME;
1446 bytestream2_skip(&ch_gb, 4);
1447 xsub = bytestream2_get_le32(&ch_gb);
1448 ysub = bytestream2_get_le32(&ch_gb);
1450 if (xsub != 1 || ysub != 1) {
1451 avpriv_report_missing_feature(s->avctx,
1452 "Subsampling %dx%d",
1454 ret = AVERROR_PATCHWELCOME;
1458 if (channel_index >= 0 && s->channel_offsets[channel_index] == -1) { /* channel has not been previously assigned */
1459 if (s->pixel_type != EXR_UNKNOWN &&
1460 s->pixel_type != current_pixel_type) {
1461 av_log(s->avctx, AV_LOG_ERROR,
1462 "RGB channels not of the same depth.\n");
1463 ret = AVERROR_INVALIDDATA;
1466 s->pixel_type = current_pixel_type;
1467 s->channel_offsets[channel_index] = s->current_channel_offset;
1468 } else if (channel_index >= 0) {
1469 av_log(s->avctx, AV_LOG_WARNING,
1470 "Multiple channels with index %d.\n", channel_index);
1471 if (++dup_channels > 10) {
1472 ret = AVERROR_INVALIDDATA;
1477 s->channels = av_realloc(s->channels,
1478 ++s->nb_channels * sizeof(EXRChannel));
1480 ret = AVERROR(ENOMEM);
1483 channel = &s->channels[s->nb_channels - 1];
1484 channel->pixel_type = current_pixel_type;
1485 channel->xsub = xsub;
1486 channel->ysub = ysub;
1488 if (current_pixel_type == EXR_HALF) {
1489 s->current_channel_offset += 2;
1490 } else {/* Float or UINT32 */
1491 s->current_channel_offset += 4;
1495 /* Check if all channels are set with an offset or if the channels
1496 * are causing an overflow */
1497 if (!s->is_luma) {/* if we expected to have at least 3 channels */
1498 if (FFMIN3(s->channel_offsets[0],
1499 s->channel_offsets[1],
1500 s->channel_offsets[2]) < 0) {
1501 if (s->channel_offsets[0] < 0)
1502 av_log(s->avctx, AV_LOG_ERROR, "Missing red channel.\n");
1503 if (s->channel_offsets[1] < 0)
1504 av_log(s->avctx, AV_LOG_ERROR, "Missing green channel.\n");
1505 if (s->channel_offsets[2] < 0)
1506 av_log(s->avctx, AV_LOG_ERROR, "Missing blue channel.\n");
1507 ret = AVERROR_INVALIDDATA;
1512 // skip one last byte and update main gb
1513 s->gb.buffer = ch_gb.buffer + 1;
1515 } else if ((var_size = check_header_variable(s, "dataWindow", "box2i",
1518 ret = AVERROR_INVALIDDATA;
1522 s->xmin = bytestream2_get_le32(&s->gb);
1523 s->ymin = bytestream2_get_le32(&s->gb);
1524 s->xmax = bytestream2_get_le32(&s->gb);
1525 s->ymax = bytestream2_get_le32(&s->gb);
1526 s->xdelta = (s->xmax - s->xmin) + 1;
1527 s->ydelta = (s->ymax - s->ymin) + 1;
1530 } else if ((var_size = check_header_variable(s, "displayWindow",
1531 "box2i", 34)) >= 0) {
1533 ret = AVERROR_INVALIDDATA;
1537 bytestream2_skip(&s->gb, 8);
1538 s->w = bytestream2_get_le32(&s->gb) + 1;
1539 s->h = bytestream2_get_le32(&s->gb) + 1;
1542 } else if ((var_size = check_header_variable(s, "lineOrder",
1543 "lineOrder", 25)) >= 0) {
1546 ret = AVERROR_INVALIDDATA;
1550 line_order = bytestream2_get_byte(&s->gb);
1551 av_log(s->avctx, AV_LOG_DEBUG, "line order: %d.\n", line_order);
1552 if (line_order > 2) {
1553 av_log(s->avctx, AV_LOG_ERROR, "Unknown line order.\n");
1554 ret = AVERROR_INVALIDDATA;
1559 } else if ((var_size = check_header_variable(s, "pixelAspectRatio",
1560 "float", 31)) >= 0) {
1562 ret = AVERROR_INVALIDDATA;
1566 sar = bytestream2_get_le32(&s->gb);
1569 } else if ((var_size = check_header_variable(s, "compression",
1570 "compression", 29)) >= 0) {
1572 ret = AVERROR_INVALIDDATA;
1576 if (s->compression == EXR_UNKN)
1577 s->compression = bytestream2_get_byte(&s->gb);
1579 av_log(s->avctx, AV_LOG_WARNING,
1580 "Found more than one compression attribute.\n");
1583 } else if ((var_size = check_header_variable(s, "tiles",
1584 "tiledesc", 22)) >= 0) {
1588 av_log(s->avctx, AV_LOG_WARNING,
1589 "Found tile attribute and scanline flags. Exr will be interpreted as scanline.\n");
1591 s->tile_attr.xSize = bytestream2_get_le32(&s->gb);
1592 s->tile_attr.ySize = bytestream2_get_le32(&s->gb);
1594 tileLevel = bytestream2_get_byte(&s->gb);
1595 s->tile_attr.level_mode = tileLevel & 0x0f;
1596 s->tile_attr.level_round = (tileLevel >> 4) & 0x0f;
1598 if (s->tile_attr.level_mode >= EXR_TILE_LEVEL_UNKNOWN) {
1599 avpriv_report_missing_feature(s->avctx, "Tile level mode %d",
1600 s->tile_attr.level_mode);
1601 ret = AVERROR_PATCHWELCOME;
1605 if (s->tile_attr.level_round >= EXR_TILE_ROUND_UNKNOWN) {
1606 avpriv_report_missing_feature(s->avctx, "Tile level round %d",
1607 s->tile_attr.level_round);
1608 ret = AVERROR_PATCHWELCOME;
1613 } else if ((var_size = check_header_variable(s, "writer",
1614 "string", 1)) >= 0) {
1615 uint8_t key[256] = { 0 };
1617 bytestream2_get_buffer(&s->gb, key, FFMIN(sizeof(key) - 1, var_size));
1618 av_dict_set(&metadata, "writer", key, 0);
1623 // Check if there are enough bytes for a header
1624 if (bytestream2_get_bytes_left(&s->gb) <= 9) {
1625 av_log(s->avctx, AV_LOG_ERROR, "Incomplete header\n");
1626 ret = AVERROR_INVALIDDATA;
1630 // Process unknown variables
1631 for (i = 0; i < 2; i++) // value_name and value_type
1632 while (bytestream2_get_byte(&s->gb) != 0);
1634 // Skip variable length
1635 bytestream2_skip(&s->gb, bytestream2_get_le32(&s->gb));
1638 ff_set_sar(s->avctx, av_d2q(av_int2float(sar), 255));
1640 if (s->compression == EXR_UNKN) {
1641 av_log(s->avctx, AV_LOG_ERROR, "Missing compression attribute.\n");
1642 ret = AVERROR_INVALIDDATA;
1647 if (s->tile_attr.xSize < 1 || s->tile_attr.ySize < 1) {
1648 av_log(s->avctx, AV_LOG_ERROR, "Invalid tile attribute.\n");
1649 ret = AVERROR_INVALIDDATA;
1654 if (bytestream2_get_bytes_left(&s->gb) <= 0) {
1655 av_log(s->avctx, AV_LOG_ERROR, "Incomplete frame.\n");
1656 ret = AVERROR_INVALIDDATA;
1660 frame->metadata = metadata;
1662 // aaand we are done
1663 bytestream2_skip(&s->gb, 1);
1666 av_dict_free(&metadata);
1670 static int decode_frame(AVCodecContext *avctx, void *data,
1671 int *got_frame, AVPacket *avpkt)
1673 EXRContext *s = avctx->priv_data;
1674 ThreadFrame frame = { .f = data };
1675 AVFrame *picture = data;
1678 int i, y, ret, ymax;
1681 int nb_blocks; /* nb scanline or nb tile */
1682 uint64_t start_offset_table;
1683 uint64_t start_next_scanline;
1684 PutByteContext offset_table_writer;
1686 bytestream2_init(&s->gb, avpkt->data, avpkt->size);
1688 if ((ret = decode_header(s, picture)) < 0)
1691 switch (s->pixel_type) {
1694 if (s->channel_offsets[3] >= 0) {
1696 avctx->pix_fmt = AV_PIX_FMT_GBRAPF32;
1698 /* todo: change this when a floating point pixel format with luma with alpha is implemented */
1699 avctx->pix_fmt = AV_PIX_FMT_GBRAPF32;
1703 avctx->pix_fmt = AV_PIX_FMT_GBRPF32;
1705 avctx->pix_fmt = AV_PIX_FMT_GRAYF32;
1710 if (s->channel_offsets[3] >= 0) {
1712 avctx->pix_fmt = AV_PIX_FMT_RGBA64;
1714 avctx->pix_fmt = AV_PIX_FMT_YA16;
1718 avctx->pix_fmt = AV_PIX_FMT_RGB48;
1720 avctx->pix_fmt = AV_PIX_FMT_GRAY16;
1725 av_log(avctx, AV_LOG_ERROR, "Missing channel list.\n");
1726 return AVERROR_INVALIDDATA;
1729 if (s->apply_trc_type != AVCOL_TRC_UNSPECIFIED)
1730 avctx->color_trc = s->apply_trc_type;
1732 switch (s->compression) {
1736 s->scan_lines_per_block = 1;
1740 s->scan_lines_per_block = 16;
1745 s->scan_lines_per_block = 32;
1748 avpriv_report_missing_feature(avctx, "Compression %d", s->compression);
1749 return AVERROR_PATCHWELCOME;
1752 /* Verify the xmin, xmax, ymin and ymax before setting the actual image size.
1753 * It's possible for the data window can larger or outside the display window */
1754 if (s->xmin > s->xmax || s->ymin > s->ymax ||
1755 s->ydelta == 0xFFFFFFFF || s->xdelta == 0xFFFFFFFF) {
1756 av_log(avctx, AV_LOG_ERROR, "Wrong or missing size information.\n");
1757 return AVERROR_INVALIDDATA;
1760 if ((ret = ff_set_dimensions(avctx, s->w, s->h)) < 0)
1763 s->desc = av_pix_fmt_desc_get(avctx->pix_fmt);
1765 return AVERROR_INVALIDDATA;
1767 if (s->desc->flags & AV_PIX_FMT_FLAG_FLOAT) {
1768 planes = s->desc->nb_components;
1769 out_line_size = avctx->width * 4;
1772 out_line_size = avctx->width * 2 * s->desc->nb_components;
1776 nb_blocks = ((s->xdelta + s->tile_attr.xSize - 1) / s->tile_attr.xSize) *
1777 ((s->ydelta + s->tile_attr.ySize - 1) / s->tile_attr.ySize);
1778 } else { /* scanline */
1779 nb_blocks = (s->ydelta + s->scan_lines_per_block - 1) /
1780 s->scan_lines_per_block;
1783 if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
1786 if (bytestream2_get_bytes_left(&s->gb) < nb_blocks * 8)
1787 return AVERROR_INVALIDDATA;
1789 // check offset table and recreate it if need
1790 if (!s->is_tile && bytestream2_peek_le64(&s->gb) == 0) {
1791 av_log(s->avctx, AV_LOG_DEBUG, "recreating invalid scanline offset table\n");
1793 start_offset_table = bytestream2_tell(&s->gb);
1794 start_next_scanline = start_offset_table + nb_blocks * 8;
1795 bytestream2_init_writer(&offset_table_writer, &avpkt->data[start_offset_table], nb_blocks * 8);
1797 for (y = 0; y < nb_blocks; y++) {
1798 /* write offset of prev scanline in offset table */
1799 bytestream2_put_le64(&offset_table_writer, start_next_scanline);
1801 /* get len of next scanline */
1802 bytestream2_seek(&s->gb, start_next_scanline + 4, SEEK_SET);/* skip line number */
1803 start_next_scanline += (bytestream2_get_le32(&s->gb) + 8);
1805 bytestream2_seek(&s->gb, start_offset_table, SEEK_SET);
1808 // save pointer we are going to use in decode_block
1809 s->buf = avpkt->data;
1810 s->buf_size = avpkt->size;
1812 // Zero out the start if ymin is not 0
1813 for (i = 0; i < planes; i++) {
1814 ptr = picture->data[i];
1815 for (y = 0; y < s->ymin; y++) {
1816 memset(ptr, 0, out_line_size);
1817 ptr += picture->linesize[i];
1821 s->picture = picture;
1823 avctx->execute2(avctx, decode_block, s->thread_data, NULL, nb_blocks);
1825 ymax = FFMAX(0, s->ymax + 1);
1826 // Zero out the end if ymax+1 is not h
1827 for (i = 0; i < planes; i++) {
1828 ptr = picture->data[i] + (ymax * picture->linesize[i]);
1829 for (y = ymax; y < avctx->height; y++) {
1830 memset(ptr, 0, out_line_size);
1831 ptr += picture->linesize[i];
1835 picture->pict_type = AV_PICTURE_TYPE_I;
1841 static av_cold int decode_init(AVCodecContext *avctx)
1843 EXRContext *s = avctx->priv_data;
1845 union av_intfloat32 t;
1846 float one_gamma = 1.0f / s->gamma;
1847 avpriv_trc_function trc_func = NULL;
1851 ff_exrdsp_init(&s->dsp);
1854 ff_bswapdsp_init(&s->bbdsp);
1857 trc_func = avpriv_get_trc_function_from_trc(s->apply_trc_type);
1859 for (i = 0; i < 65536; ++i) {
1860 t = exr_half2float(i);
1861 t.f = trc_func(t.f);
1862 s->gamma_table[i] = t;
1865 if (one_gamma > 0.9999f && one_gamma < 1.0001f) {
1866 for (i = 0; i < 65536; ++i) {
1867 s->gamma_table[i] = exr_half2float(i);
1870 for (i = 0; i < 65536; ++i) {
1871 t = exr_half2float(i);
1872 /* If negative value we reuse half value */
1874 s->gamma_table[i] = t;
1876 t.f = powf(t.f, one_gamma);
1877 s->gamma_table[i] = t;
1883 // allocate thread data, used for non EXR_RAW compression types
1884 s->thread_data = av_mallocz_array(avctx->thread_count, sizeof(EXRThreadData));
1885 if (!s->thread_data)
1886 return AVERROR_INVALIDDATA;
1891 static av_cold int decode_end(AVCodecContext *avctx)
1893 EXRContext *s = avctx->priv_data;
1895 for (i = 0; i < avctx->thread_count; i++) {
1896 EXRThreadData *td = &s->thread_data[i];
1897 av_freep(&td->uncompressed_data);
1899 av_freep(&td->bitmap);
1903 av_freep(&s->thread_data);
1904 av_freep(&s->channels);
1909 #define OFFSET(x) offsetof(EXRContext, x)
1910 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1911 static const AVOption options[] = {
1912 { "layer", "Set the decoding layer", OFFSET(layer),
1913 AV_OPT_TYPE_STRING, { .str = "" }, 0, 0, VD },
1914 { "gamma", "Set the float gamma value when decoding", OFFSET(gamma),
1915 AV_OPT_TYPE_FLOAT, { .dbl = 1.0f }, 0.001, FLT_MAX, VD },
1917 // XXX: Note the abuse of the enum using AVCOL_TRC_UNSPECIFIED to subsume the existing gamma option
1918 { "apply_trc", "color transfer characteristics to apply to EXR linear input", OFFSET(apply_trc_type),
1919 AV_OPT_TYPE_INT, {.i64 = AVCOL_TRC_UNSPECIFIED }, 1, AVCOL_TRC_NB-1, VD, "apply_trc_type"},
1920 { "bt709", "BT.709", 0,
1921 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_BT709 }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1922 { "gamma", "gamma", 0,
1923 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_UNSPECIFIED }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1924 { "gamma22", "BT.470 M", 0,
1925 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_GAMMA22 }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1926 { "gamma28", "BT.470 BG", 0,
1927 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_GAMMA28 }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1928 { "smpte170m", "SMPTE 170 M", 0,
1929 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_SMPTE170M }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1930 { "smpte240m", "SMPTE 240 M", 0,
1931 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_SMPTE240M }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1932 { "linear", "Linear", 0,
1933 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_LINEAR }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1935 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_LOG }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1936 { "log_sqrt", "Log square root", 0,
1937 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_LOG_SQRT }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1938 { "iec61966_2_4", "IEC 61966-2-4", 0,
1939 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_IEC61966_2_4 }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1940 { "bt1361", "BT.1361", 0,
1941 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_BT1361_ECG }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1942 { "iec61966_2_1", "IEC 61966-2-1", 0,
1943 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_IEC61966_2_1 }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1944 { "bt2020_10bit", "BT.2020 - 10 bit", 0,
1945 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_BT2020_10 }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1946 { "bt2020_12bit", "BT.2020 - 12 bit", 0,
1947 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_BT2020_12 }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1948 { "smpte2084", "SMPTE ST 2084", 0,
1949 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_SMPTEST2084 }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1950 { "smpte428_1", "SMPTE ST 428-1", 0,
1951 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_SMPTEST428_1 }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1956 static const AVClass exr_class = {
1957 .class_name = "EXR",
1958 .item_name = av_default_item_name,
1960 .version = LIBAVUTIL_VERSION_INT,
1963 AVCodec ff_exr_decoder = {
1965 .long_name = NULL_IF_CONFIG_SMALL("OpenEXR image"),
1966 .type = AVMEDIA_TYPE_VIDEO,
1967 .id = AV_CODEC_ID_EXR,
1968 .priv_data_size = sizeof(EXRContext),
1969 .init = decode_init,
1970 .close = decode_end,
1971 .decode = decode_frame,
1972 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS |
1973 AV_CODEC_CAP_SLICE_THREADS,
1974 .priv_class = &exr_class,