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 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_flt2uint() and exr_halflt2uint() is credited to Reimar Döffinger.
34 * exr_half2float() is credited to Aaftab Munshi, Dan Ginsburg, Dave Shreiner.
40 #include "libavutil/common.h"
41 #include "libavutil/imgutils.h"
42 #include "libavutil/intfloat.h"
43 #include "libavutil/opt.h"
44 #include "libavutil/color_utils.h"
47 #include "bytestream.h"
72 enum ExrTileLevelMode {
74 EXR_TILE_LEVEL_MIPMAP,
75 EXR_TILE_LEVEL_RIPMAP,
76 EXR_TILE_LEVEL_UNKNOWN,
79 enum ExrTileLevelRound {
82 EXR_TILE_ROUND_UNKNOWN,
85 typedef struct EXRChannel {
87 enum ExrPixelType pixel_type;
90 typedef struct EXRTileAttribute {
93 enum ExrTileLevelMode level_mode;
94 enum ExrTileLevelRound level_round;
97 typedef struct EXRThreadData {
98 uint8_t *uncompressed_data;
99 int uncompressed_size;
110 typedef struct EXRContext {
113 AVCodecContext *avctx;
115 enum ExrCompr compression;
116 enum ExrPixelType pixel_type;
117 int channel_offsets[4]; // 0 = red, 1 = green, 2 = blue and 3 = alpha
118 const AVPixFmtDescriptor *desc;
123 uint32_t xdelta, ydelta;
125 uint64_t scan_line_size;
126 int scan_lines_per_block;
128 EXRTileAttribute tile_attr; /* header data attribute of tile */
129 int is_tile; /* 0 if scanline, 1 if tile */
135 EXRChannel *channels;
137 int current_channel_offset;
139 EXRThreadData *thread_data;
143 enum AVColorTransferCharacteristic apply_trc_type;
145 uint16_t gamma_table[65536];
148 /* -15 stored using a single precision bias of 127 */
149 #define HALF_FLOAT_MIN_BIASED_EXP_AS_SINGLE_FP_EXP 0x38000000
151 /* max exponent value in single precision that will be converted
152 * to Inf or Nan when stored as a half-float */
153 #define HALF_FLOAT_MAX_BIASED_EXP_AS_SINGLE_FP_EXP 0x47800000
155 /* 255 is the max exponent biased value */
156 #define FLOAT_MAX_BIASED_EXP (0xFF << 23)
158 #define HALF_FLOAT_MAX_BIASED_EXP (0x1F << 10)
161 * Convert a half float as a uint16_t into a full float.
163 * @param hf half float as uint16_t
165 * @return float value
167 static union av_intfloat32 exr_half2float(uint16_t hf)
169 unsigned int sign = (unsigned int) (hf >> 15);
170 unsigned int mantissa = (unsigned int) (hf & ((1 << 10) - 1));
171 unsigned int exp = (unsigned int) (hf & HALF_FLOAT_MAX_BIASED_EXP);
172 union av_intfloat32 f;
174 if (exp == HALF_FLOAT_MAX_BIASED_EXP) {
175 // we have a half-float NaN or Inf
176 // half-float NaNs will be converted to a single precision NaN
177 // half-float Infs will be converted to a single precision Inf
178 exp = FLOAT_MAX_BIASED_EXP;
180 mantissa = (1 << 23) - 1; // set all bits to indicate a NaN
181 } else if (exp == 0x0) {
182 // convert half-float zero/denorm to single precision value
185 exp = HALF_FLOAT_MIN_BIASED_EXP_AS_SINGLE_FP_EXP;
186 // check for leading 1 in denorm mantissa
187 while ((mantissa & (1 << 10))) {
188 // for every leading 0, decrement single precision exponent by 1
189 // and shift half-float mantissa value to the left
193 // clamp the mantissa to 10-bits
194 mantissa &= ((1 << 10) - 1);
195 // shift left to generate single-precision mantissa of 23-bits
199 // shift left to generate single-precision mantissa of 23-bits
201 // generate single precision biased exponent value
202 exp = (exp << 13) + HALF_FLOAT_MIN_BIASED_EXP_AS_SINGLE_FP_EXP;
205 f.i = (sign << 31) | exp | mantissa;
212 * Convert from 32-bit float as uint32_t to uint16_t.
214 * @param v 32-bit float
216 * @return normalized 16-bit unsigned int
218 static inline uint16_t exr_flt2uint(uint32_t v)
220 unsigned int exp = v >> 23;
221 // "HACK": negative values result in exp< 0, so clipping them to 0
222 // is also handled by this condition, avoids explicit check for sign bit.
223 if (exp <= 127 + 7 - 24) // we would shift out all bits anyway
228 return (v + (1 << 23)) >> (127 + 7 - exp);
232 * Convert from 16-bit float as uint16_t to uint16_t.
234 * @param v 16-bit float
236 * @return normalized 16-bit unsigned int
238 static inline uint16_t exr_halflt2uint(uint16_t v)
240 unsigned exp = 14 - (v >> 10);
245 return (v & 0x8000) ? 0 : 0xffff;
248 return (v + (1 << 16)) >> (exp + 1);
251 static void predictor(uint8_t *src, int size)
253 uint8_t *t = src + 1;
254 uint8_t *stop = src + size;
257 int d = (int) t[-1] + (int) t[0] - 128;
263 static void reorder_pixels(uint8_t *src, uint8_t *dst, int size)
265 const int8_t *t1 = src;
266 const int8_t *t2 = src + (size + 1) / 2;
268 int8_t *stop = s + size;
283 static int zip_uncompress(const uint8_t *src, int compressed_size,
284 int uncompressed_size, EXRThreadData *td)
286 unsigned long dest_len = uncompressed_size;
288 if (uncompress(td->tmp, &dest_len, src, compressed_size) != Z_OK ||
289 dest_len != uncompressed_size)
290 return AVERROR_INVALIDDATA;
292 predictor(td->tmp, uncompressed_size);
293 reorder_pixels(td->tmp, td->uncompressed_data, uncompressed_size);
298 static int rle_uncompress(const uint8_t *src, int compressed_size,
299 int uncompressed_size, EXRThreadData *td)
301 uint8_t *d = td->tmp;
302 const int8_t *s = src;
303 int ssize = compressed_size;
304 int dsize = uncompressed_size;
305 uint8_t *dend = d + dsize;
314 if ((dsize -= count) < 0 ||
315 (ssize -= count + 1) < 0)
316 return AVERROR_INVALIDDATA;
323 if ((dsize -= count) < 0 ||
325 return AVERROR_INVALIDDATA;
335 return AVERROR_INVALIDDATA;
337 predictor(td->tmp, uncompressed_size);
338 reorder_pixels(td->tmp, td->uncompressed_data, uncompressed_size);
343 #define USHORT_RANGE (1 << 16)
344 #define BITMAP_SIZE (1 << 13)
346 static uint16_t reverse_lut(const uint8_t *bitmap, uint16_t *lut)
350 for (i = 0; i < USHORT_RANGE; i++)
351 if ((i == 0) || (bitmap[i >> 3] & (1 << (i & 7))))
356 memset(lut + k, 0, (USHORT_RANGE - k) * 2);
361 static void apply_lut(const uint16_t *lut, uint16_t *dst, int dsize)
365 for (i = 0; i < dsize; ++i)
366 dst[i] = lut[dst[i]];
369 #define HUF_ENCBITS 16 // literal (value) bit length
370 #define HUF_DECBITS 14 // decoding bit size (>= 8)
372 #define HUF_ENCSIZE ((1 << HUF_ENCBITS) + 1) // encoding table size
373 #define HUF_DECSIZE (1 << HUF_DECBITS) // decoding table size
374 #define HUF_DECMASK (HUF_DECSIZE - 1)
376 typedef struct HufDec {
382 static void huf_canonical_code_table(uint64_t *hcode)
384 uint64_t c, n[59] = { 0 };
387 for (i = 0; i < HUF_ENCSIZE; ++i)
391 for (i = 58; i > 0; --i) {
392 uint64_t nc = ((c + n[i]) >> 1);
397 for (i = 0; i < HUF_ENCSIZE; ++i) {
401 hcode[i] = l | (n[l]++ << 6);
405 #define SHORT_ZEROCODE_RUN 59
406 #define LONG_ZEROCODE_RUN 63
407 #define SHORTEST_LONG_RUN (2 + LONG_ZEROCODE_RUN - SHORT_ZEROCODE_RUN)
408 #define LONGEST_LONG_RUN (255 + SHORTEST_LONG_RUN)
410 static int huf_unpack_enc_table(GetByteContext *gb,
411 int32_t im, int32_t iM, uint64_t *hcode)
414 int ret = init_get_bits8(&gbit, gb->buffer, bytestream2_get_bytes_left(gb));
418 for (; im <= iM; im++) {
419 uint64_t l = hcode[im] = get_bits(&gbit, 6);
421 if (l == LONG_ZEROCODE_RUN) {
422 int zerun = get_bits(&gbit, 8) + SHORTEST_LONG_RUN;
424 if (im + zerun > iM + 1)
425 return AVERROR_INVALIDDATA;
431 } else if (l >= SHORT_ZEROCODE_RUN) {
432 int zerun = l - SHORT_ZEROCODE_RUN + 2;
434 if (im + zerun > iM + 1)
435 return AVERROR_INVALIDDATA;
444 bytestream2_skip(gb, (get_bits_count(&gbit) + 7) / 8);
445 huf_canonical_code_table(hcode);
450 static int huf_build_dec_table(const uint64_t *hcode, int im,
451 int iM, HufDec *hdecod)
453 for (; im <= iM; im++) {
454 uint64_t c = hcode[im] >> 6;
455 int i, l = hcode[im] & 63;
458 return AVERROR_INVALIDDATA;
460 if (l > HUF_DECBITS) {
461 HufDec *pl = hdecod + (c >> (l - HUF_DECBITS));
463 return AVERROR_INVALIDDATA;
467 pl->p = av_realloc(pl->p, pl->lit * sizeof(int));
469 return AVERROR(ENOMEM);
471 pl->p[pl->lit - 1] = im;
473 HufDec *pl = hdecod + (c << (HUF_DECBITS - l));
475 for (i = 1 << (HUF_DECBITS - l); i > 0; i--, pl++) {
476 if (pl->len || pl->p)
477 return AVERROR_INVALIDDATA;
487 #define get_char(c, lc, gb) \
489 c = (c << 8) | bytestream2_get_byte(gb); \
493 #define get_code(po, rlc, c, lc, gb, out, oe, outb) \
497 get_char(c, lc, gb); \
502 if (out + cs > oe || out == outb) \
503 return AVERROR_INVALIDDATA; \
509 } else if (out < oe) { \
512 return AVERROR_INVALIDDATA; \
516 static int huf_decode(const uint64_t *hcode, const HufDec *hdecod,
517 GetByteContext *gb, int nbits,
518 int rlc, int no, uint16_t *out)
521 uint16_t *outb = out;
522 uint16_t *oe = out + no;
523 const uint8_t *ie = gb->buffer + (nbits + 7) / 8; // input byte size
528 while (gb->buffer < ie) {
531 while (lc >= HUF_DECBITS) {
532 const HufDec pl = hdecod[(c >> (lc - HUF_DECBITS)) & HUF_DECMASK];
536 get_code(pl.lit, rlc, c, lc, gb, out, oe, outb);
541 return AVERROR_INVALIDDATA;
543 for (j = 0; j < pl.lit; j++) {
544 int l = hcode[pl.p[j]] & 63;
546 while (lc < l && bytestream2_get_bytes_left(gb) > 0)
550 if ((hcode[pl.p[j]] >> 6) ==
551 ((c >> (lc - l)) & ((1LL << l) - 1))) {
553 get_code(pl.p[j], rlc, c, lc, gb, out, oe, outb);
560 return AVERROR_INVALIDDATA;
570 const HufDec pl = hdecod[(c << (HUF_DECBITS - lc)) & HUF_DECMASK];
574 get_code(pl.lit, rlc, c, lc, gb, out, oe, outb);
576 return AVERROR_INVALIDDATA;
580 if (out - outb != no)
581 return AVERROR_INVALIDDATA;
585 static int huf_uncompress(GetByteContext *gb,
586 uint16_t *dst, int dst_size)
588 int32_t src_size, im, iM;
594 src_size = bytestream2_get_le32(gb);
595 im = bytestream2_get_le32(gb);
596 iM = bytestream2_get_le32(gb);
597 bytestream2_skip(gb, 4);
598 nBits = bytestream2_get_le32(gb);
599 if (im < 0 || im >= HUF_ENCSIZE ||
600 iM < 0 || iM >= HUF_ENCSIZE ||
602 return AVERROR_INVALIDDATA;
604 bytestream2_skip(gb, 4);
606 freq = av_mallocz_array(HUF_ENCSIZE, sizeof(*freq));
607 hdec = av_mallocz_array(HUF_DECSIZE, sizeof(*hdec));
608 if (!freq || !hdec) {
609 ret = AVERROR(ENOMEM);
613 if ((ret = huf_unpack_enc_table(gb, im, iM, freq)) < 0)
616 if (nBits > 8 * bytestream2_get_bytes_left(gb)) {
617 ret = AVERROR_INVALIDDATA;
621 if ((ret = huf_build_dec_table(freq, im, iM, hdec)) < 0)
623 ret = huf_decode(freq, hdec, gb, nBits, iM, dst_size, dst);
626 for (i = 0; i < HUF_DECSIZE; i++)
628 av_freep(&hdec[i].p);
636 static inline void wdec14(uint16_t l, uint16_t h, uint16_t *a, uint16_t *b)
641 int ai = ls + (hi & 1) + (hi >> 1);
643 int16_t bs = ai - hi;
650 #define A_OFFSET (1 << (NBITS - 1))
651 #define MOD_MASK ((1 << NBITS) - 1)
653 static inline void wdec16(uint16_t l, uint16_t h, uint16_t *a, uint16_t *b)
657 int bb = (m - (d >> 1)) & MOD_MASK;
658 int aa = (d + bb - A_OFFSET) & MOD_MASK;
663 static void wav_decode(uint16_t *in, int nx, int ox,
664 int ny, int oy, uint16_t mx)
666 int w14 = (mx < (1 << 14));
667 int n = (nx > ny) ? ny : nx;
680 uint16_t *ey = in + oy * (ny - p2);
681 uint16_t i00, i01, i10, i11;
687 for (; py <= ey; py += oy2) {
689 uint16_t *ex = py + ox * (nx - p2);
691 for (; px <= ex; px += ox2) {
692 uint16_t *p01 = px + ox1;
693 uint16_t *p10 = px + oy1;
694 uint16_t *p11 = p10 + ox1;
697 wdec14(*px, *p10, &i00, &i10);
698 wdec14(*p01, *p11, &i01, &i11);
699 wdec14(i00, i01, px, p01);
700 wdec14(i10, i11, p10, p11);
702 wdec16(*px, *p10, &i00, &i10);
703 wdec16(*p01, *p11, &i01, &i11);
704 wdec16(i00, i01, px, p01);
705 wdec16(i10, i11, p10, p11);
710 uint16_t *p10 = px + oy1;
713 wdec14(*px, *p10, &i00, p10);
715 wdec16(*px, *p10, &i00, p10);
723 uint16_t *ex = py + ox * (nx - p2);
725 for (; px <= ex; px += ox2) {
726 uint16_t *p01 = px + ox1;
729 wdec14(*px, *p01, &i00, p01);
731 wdec16(*px, *p01, &i00, p01);
742 static int piz_uncompress(EXRContext *s, const uint8_t *src, int ssize,
743 int dsize, EXRThreadData *td)
746 uint16_t maxval, min_non_zero, max_non_zero;
748 uint16_t *tmp = (uint16_t *)td->tmp;
753 td->bitmap = av_malloc(BITMAP_SIZE);
755 td->lut = av_malloc(1 << 17);
756 if (!td->bitmap || !td->lut) {
757 av_freep(&td->bitmap);
759 return AVERROR(ENOMEM);
762 bytestream2_init(&gb, src, ssize);
763 min_non_zero = bytestream2_get_le16(&gb);
764 max_non_zero = bytestream2_get_le16(&gb);
766 if (max_non_zero >= BITMAP_SIZE)
767 return AVERROR_INVALIDDATA;
769 memset(td->bitmap, 0, FFMIN(min_non_zero, BITMAP_SIZE));
770 if (min_non_zero <= max_non_zero)
771 bytestream2_get_buffer(&gb, td->bitmap + min_non_zero,
772 max_non_zero - min_non_zero + 1);
773 memset(td->bitmap + max_non_zero + 1, 0, BITMAP_SIZE - max_non_zero - 1);
775 maxval = reverse_lut(td->bitmap, td->lut);
777 ret = huf_uncompress(&gb, tmp, dsize / sizeof(uint16_t));
782 for (i = 0; i < s->nb_channels; i++) {
783 EXRChannel *channel = &s->channels[i];
784 int size = channel->pixel_type;
786 for (j = 0; j < size; j++)
787 wav_decode(ptr + j, td->xsize, size, td->ysize,
788 td->xsize * size, maxval);
789 ptr += td->xsize * td->ysize * size;
792 apply_lut(td->lut, tmp, dsize / sizeof(uint16_t));
794 out = td->uncompressed_data;
795 for (i = 0; i < td->ysize; i++)
796 for (j = 0; j < s->nb_channels; j++) {
797 uint16_t *in = tmp + j * td->xsize * td->ysize + i * td->xsize;
798 memcpy(out, in, td->xsize * 2);
799 out += td->xsize * 2;
805 static int pxr24_uncompress(EXRContext *s, const uint8_t *src,
806 int compressed_size, int uncompressed_size,
809 unsigned long dest_len, expected_len;
810 const uint8_t *in = td->tmp;
814 if (s->pixel_type == EXR_FLOAT)
815 expected_len = (uncompressed_size / 4) * 3; /* PRX 24 store float in 24 bit instead of 32 */
817 expected_len = uncompressed_size;
819 dest_len = expected_len;
821 if (uncompress(td->tmp, &dest_len, src, compressed_size) != Z_OK) {
822 return AVERROR_INVALIDDATA;
823 } else if (dest_len != expected_len) {
824 return AVERROR_INVALIDDATA;
827 out = td->uncompressed_data;
828 for (i = 0; i < td->ysize; i++)
829 for (c = 0; c < s->nb_channels; c++) {
830 EXRChannel *channel = &s->channels[c];
831 const uint8_t *ptr[4];
834 switch (channel->pixel_type) {
837 ptr[1] = ptr[0] + td->xsize;
838 ptr[2] = ptr[1] + td->xsize;
839 in = ptr[2] + td->xsize;
841 for (j = 0; j < td->xsize; ++j) {
842 uint32_t diff = (*(ptr[0]++) << 24) |
843 (*(ptr[1]++) << 16) |
846 bytestream_put_le32(&out, pixel);
851 ptr[1] = ptr[0] + td->xsize;
852 in = ptr[1] + td->xsize;
853 for (j = 0; j < td->xsize; j++) {
854 uint32_t diff = (*(ptr[0]++) << 8) | *(ptr[1]++);
857 bytestream_put_le16(&out, pixel);
861 return AVERROR_INVALIDDATA;
868 static void unpack_14(const uint8_t b[14], uint16_t s[16])
870 unsigned short shift = (b[ 2] >> 2);
871 unsigned short bias = (0x20 << shift);
874 s[ 0] = (b[0] << 8) | b[1];
876 s[ 4] = s[ 0] + ((((b[ 2] << 4) | (b[ 3] >> 4)) & 0x3f) << shift) - bias;
877 s[ 8] = s[ 4] + ((((b[ 3] << 2) | (b[ 4] >> 6)) & 0x3f) << shift) - bias;
878 s[12] = s[ 8] + ((b[ 4] & 0x3f) << shift) - bias;
880 s[ 1] = s[ 0] + ((b[ 5] >> 2) << shift) - bias;
881 s[ 5] = s[ 4] + ((((b[ 5] << 4) | (b[ 6] >> 4)) & 0x3f) << shift) - bias;
882 s[ 9] = s[ 8] + ((((b[ 6] << 2) | (b[ 7] >> 6)) & 0x3f) << shift) - bias;
883 s[13] = s[12] + ((b[ 7] & 0x3f) << shift) - bias;
885 s[ 2] = s[ 1] + ((b[ 8] >> 2) << shift) - bias;
886 s[ 6] = s[ 5] + ((((b[ 8] << 4) | (b[ 9] >> 4)) & 0x3f) << shift) - bias;
887 s[10] = s[ 9] + ((((b[ 9] << 2) | (b[10] >> 6)) & 0x3f) << shift) - bias;
888 s[14] = s[13] + ((b[10] & 0x3f) << shift) - bias;
890 s[ 3] = s[ 2] + ((b[11] >> 2) << shift) - bias;
891 s[ 7] = s[ 6] + ((((b[11] << 4) | (b[12] >> 4)) & 0x3f) << shift) - bias;
892 s[11] = s[10] + ((((b[12] << 2) | (b[13] >> 6)) & 0x3f) << shift) - bias;
893 s[15] = s[14] + ((b[13] & 0x3f) << shift) - bias;
895 for (i = 0; i < 16; ++i) {
903 static void unpack_3(const uint8_t b[3], uint16_t s[16])
907 s[0] = (b[0] << 8) | b[1];
914 for (i = 1; i < 16; i++)
919 static int b44_uncompress(EXRContext *s, const uint8_t *src, int compressed_size,
920 int uncompressed_size, EXRThreadData *td) {
921 const int8_t *sr = src;
922 int stayToUncompress = compressed_size;
923 int nbB44BlockW, nbB44BlockH;
924 int indexHgX, indexHgY, indexOut, indexTmp;
925 uint16_t tmpBuffer[16]; /* B44 use 4x4 half float pixel */
928 /* calc B44 block count */
929 nbB44BlockW = td->xsize / 4;
930 if ((td->xsize % 4) != 0)
933 nbB44BlockH = td->ysize / 4;
934 if ((td->ysize % 4) != 0)
937 for (c = 0; c < s->nb_channels; c++) {
938 for (iY = 0; iY < nbB44BlockH; iY++) {
939 for (iX = 0; iX < nbB44BlockW; iX++) {/* For each B44 block */
940 if (stayToUncompress < 3) {
941 av_log(s, AV_LOG_ERROR, "Not enough data for B44A block: %d", stayToUncompress);
942 return AVERROR_INVALIDDATA;
945 if (src[compressed_size - stayToUncompress + 2] == 0xfc) { /* B44A block */
946 unpack_3(sr, tmpBuffer);
948 stayToUncompress -= 3;
949 } else {/* B44 Block */
950 if (stayToUncompress < 14) {
951 av_log(s, AV_LOG_ERROR, "Not enough data for B44 block: %d", stayToUncompress);
952 return AVERROR_INVALIDDATA;
954 unpack_14(sr, tmpBuffer);
956 stayToUncompress -= 14;
959 /* copy data to uncompress buffer (B44 block can exceed target resolution)*/
963 for (y = indexHgY; y < FFMIN(indexHgY + 4, td->ysize); y++) {
964 for (x = indexHgX; x < FFMIN(indexHgX + 4, td->xsize); x++) {
965 indexOut = (c * td->xsize + y * td->xsize * s->nb_channels + x) * 2;
966 indexTmp = (y-indexHgY) * 4 + (x-indexHgX);
967 td->uncompressed_data[indexOut] = tmpBuffer[indexTmp] & 0xff;
968 td->uncompressed_data[indexOut + 1] = tmpBuffer[indexTmp] >> 8;
978 static int decode_block(AVCodecContext *avctx, void *tdata,
979 int jobnr, int threadnr)
981 EXRContext *s = avctx->priv_data;
982 AVFrame *const p = s->picture;
983 EXRThreadData *td = &s->thread_data[threadnr];
984 const uint8_t *channel_buffer[4] = { 0 };
985 const uint8_t *buf = s->buf;
986 uint64_t line_offset, uncompressed_size;
987 uint32_t xdelta = s->xdelta;
990 uint32_t data_size, line, col = 0;
991 uint32_t tileX, tileY, tileLevelX, tileLevelY;
992 int channelLineSize, indexSrc, tX, tY, tCh;
994 int axmax = (avctx->width - (s->xmax + 1)) * 2 * s->desc->nb_components; /* nb pixel to add at the right of the datawindow */
995 int bxmin = s->xmin * 2 * s->desc->nb_components; /* nb pixel to add at the left of the datawindow */
996 int i, x, buf_size = s->buf_size;
997 float one_gamma = 1.0f / s->gamma;
998 avpriv_trc_function trc_func = avpriv_get_trc_function_from_trc(s->apply_trc_type);
1001 line_offset = AV_RL64(s->gb.buffer + jobnr * 8);
1004 if (line_offset > buf_size - 20)
1005 return AVERROR_INVALIDDATA;
1007 src = buf + line_offset + 20;
1009 tileX = AV_RL32(src - 20);
1010 tileY = AV_RL32(src - 16);
1011 tileLevelX = AV_RL32(src - 12);
1012 tileLevelY = AV_RL32(src - 8);
1014 data_size = AV_RL32(src - 4);
1015 if (data_size <= 0 || data_size > buf_size)
1016 return AVERROR_INVALIDDATA;
1018 if (tileLevelX || tileLevelY) { /* tile level, is not the full res level */
1019 avpriv_report_missing_feature(s->avctx, "Subres tile before full res tile");
1020 return AVERROR_PATCHWELCOME;
1023 line = s->tile_attr.ySize * tileY;
1024 col = s->tile_attr.xSize * tileX;
1026 td->ysize = FFMIN(s->tile_attr.ySize, s->ydelta - tileY * s->tile_attr.ySize);
1027 td->xsize = FFMIN(s->tile_attr.xSize, s->xdelta - tileX * s->tile_attr.xSize);
1028 uncompressed_size = s->current_channel_offset * td->ysize * td->xsize;
1030 if (col) { /* not the first tile of the line */
1031 bxmin = 0; axmax = 0; /* doesn't add pixel at the left of the datawindow */
1034 if ((col + td->xsize) != s->xdelta)/* not the last tile of the line */
1035 axmax = 0; /* doesn't add pixel at the right of the datawindow */
1037 if (line_offset > buf_size - 8)
1038 return AVERROR_INVALIDDATA;
1040 src = buf + line_offset + 8;
1041 line = AV_RL32(src - 8);
1043 if (line < s->ymin || line > s->ymax)
1044 return AVERROR_INVALIDDATA;
1046 data_size = AV_RL32(src - 4);
1047 if (data_size <= 0 || data_size > buf_size)
1048 return AVERROR_INVALIDDATA;
1050 td->ysize = FFMIN(s->scan_lines_per_block, s->ymax - line + 1); /* s->ydelta - line ?? */
1051 td->xsize = s->xdelta;
1052 uncompressed_size = s->scan_line_size * td->ysize;
1053 if ((s->compression == EXR_RAW && (data_size != uncompressed_size ||
1054 line_offset > buf_size - uncompressed_size)) ||
1055 (s->compression != EXR_RAW && (data_size > uncompressed_size ||
1056 line_offset > buf_size - data_size))) {
1057 return AVERROR_INVALIDDATA;
1061 if (data_size < uncompressed_size || s->is_tile) { /* td->tmp is use for tile reorganization */
1062 av_fast_padded_malloc(&td->tmp, &td->tmp_size, uncompressed_size);
1064 return AVERROR(ENOMEM);
1067 if (data_size < uncompressed_size) {
1068 av_fast_padded_malloc(&td->uncompressed_data,
1069 &td->uncompressed_size, uncompressed_size);
1071 if (!td->uncompressed_data)
1072 return AVERROR(ENOMEM);
1074 ret = AVERROR_INVALIDDATA;
1075 switch (s->compression) {
1078 ret = zip_uncompress(src, data_size, uncompressed_size, td);
1081 ret = piz_uncompress(s, src, data_size, uncompressed_size, td);
1084 ret = pxr24_uncompress(s, src, data_size, uncompressed_size, td);
1087 ret = rle_uncompress(src, data_size, uncompressed_size, td);
1091 ret = b44_uncompress(s, src, data_size, uncompressed_size, td);
1095 av_log(avctx, AV_LOG_ERROR, "decode_block() failed.\n");
1098 src = td->uncompressed_data;
1103 channelLineSize = td->xsize * 2;
1104 if (s->pixel_type == EXR_FLOAT)
1105 channelLineSize *= 2;
1107 /* reorganise tile data to have each channel one after the other instead of line by line */
1108 for (tY = 0; tY < td->ysize; tY ++) {
1109 for (tCh = 0; tCh < s->nb_channels; tCh++) {
1110 for (tX = 0; tX < channelLineSize; tX++) {
1111 td->tmp[tCh * channelLineSize * td->ysize + tY * channelLineSize + tX] = src[indexSrc];
1117 channel_buffer[0] = td->tmp + td->xsize * s->channel_offsets[0] * td->ysize;
1118 channel_buffer[1] = td->tmp + td->xsize * s->channel_offsets[1] * td->ysize;
1119 channel_buffer[2] = td->tmp + td->xsize * s->channel_offsets[2] * td->ysize;
1120 if (s->channel_offsets[3] >= 0)
1121 channel_buffer[3] = td->tmp + td->xsize * s->channel_offsets[3];
1123 channel_buffer[0] = src + xdelta * s->channel_offsets[0];
1124 channel_buffer[1] = src + xdelta * s->channel_offsets[1];
1125 channel_buffer[2] = src + xdelta * s->channel_offsets[2];
1126 if (s->channel_offsets[3] >= 0)
1127 channel_buffer[3] = src + xdelta * s->channel_offsets[3];
1130 ptr = p->data[0] + line * p->linesize[0] + (col * s->desc->nb_components * 2);
1133 i < td->ysize; i++, ptr += p->linesize[0]) {
1135 const uint8_t *r, *g, *b, *a;
1137 r = channel_buffer[0];
1138 g = channel_buffer[1];
1139 b = channel_buffer[2];
1140 if (channel_buffer[3])
1141 a = channel_buffer[3];
1143 ptr_x = (uint16_t *) ptr;
1145 // Zero out the start if xmin is not 0
1146 memset(ptr_x, 0, bxmin);
1147 ptr_x += s->xmin * s->desc->nb_components;
1149 if (s->pixel_type == EXR_FLOAT) {
1152 for (x = 0; x < td->xsize; x++) {
1153 union av_intfloat32 t;
1154 t.i = bytestream_get_le32(&r);
1155 t.f = trc_func(t.f);
1156 *ptr_x++ = exr_flt2uint(t.i);
1158 t.i = bytestream_get_le32(&g);
1159 t.f = trc_func(t.f);
1160 *ptr_x++ = exr_flt2uint(t.i);
1162 t.i = bytestream_get_le32(&b);
1163 t.f = trc_func(t.f);
1164 *ptr_x++ = exr_flt2uint(t.i);
1165 if (channel_buffer[3])
1166 *ptr_x++ = exr_flt2uint(bytestream_get_le32(&a));
1169 for (x = 0; x < td->xsize; x++) {
1170 union av_intfloat32 t;
1171 t.i = bytestream_get_le32(&r);
1172 if (t.f > 0.0f) /* avoid negative values */
1173 t.f = powf(t.f, one_gamma);
1174 *ptr_x++ = exr_flt2uint(t.i);
1176 t.i = bytestream_get_le32(&g);
1178 t.f = powf(t.f, one_gamma);
1179 *ptr_x++ = exr_flt2uint(t.i);
1181 t.i = bytestream_get_le32(&b);
1183 t.f = powf(t.f, one_gamma);
1184 *ptr_x++ = exr_flt2uint(t.i);
1185 if (channel_buffer[3])
1186 *ptr_x++ = exr_flt2uint(bytestream_get_le32(&a));
1191 for (x = 0; x < td->xsize; x++) {
1192 *ptr_x++ = s->gamma_table[bytestream_get_le16(&r)];
1193 *ptr_x++ = s->gamma_table[bytestream_get_le16(&g)];
1194 *ptr_x++ = s->gamma_table[bytestream_get_le16(&b)];
1195 if (channel_buffer[3])
1196 *ptr_x++ = exr_halflt2uint(bytestream_get_le16(&a));
1200 // Zero out the end if xmax+1 is not w
1201 memset(ptr_x, 0, axmax);
1204 channel_buffer[0] += channelLineSize;
1205 channel_buffer[1] += channelLineSize;
1206 channel_buffer[2] += channelLineSize;
1207 if (channel_buffer[3])
1208 channel_buffer[3] += channelLineSize;
1210 channel_buffer[0] += s->scan_line_size;
1211 channel_buffer[1] += s->scan_line_size;
1212 channel_buffer[2] += s->scan_line_size;
1213 if (channel_buffer[3])
1214 channel_buffer[3] += s->scan_line_size;
1222 * Check if the variable name corresponds to its data type.
1224 * @param s the EXRContext
1225 * @param value_name name of the variable to check
1226 * @param value_type type of the variable to check
1227 * @param minimum_length minimum length of the variable data
1229 * @return bytes to read containing variable data
1230 * -1 if variable is not found
1231 * 0 if buffer ended prematurely
1233 static int check_header_variable(EXRContext *s,
1234 const char *value_name,
1235 const char *value_type,
1236 unsigned int minimum_length)
1240 if (bytestream2_get_bytes_left(&s->gb) >= minimum_length &&
1241 !strcmp(s->gb.buffer, value_name)) {
1242 // found value_name, jump to value_type (null terminated strings)
1243 s->gb.buffer += strlen(value_name) + 1;
1244 if (!strcmp(s->gb.buffer, value_type)) {
1245 s->gb.buffer += strlen(value_type) + 1;
1246 var_size = bytestream2_get_le32(&s->gb);
1247 // don't go read past boundaries
1248 if (var_size > bytestream2_get_bytes_left(&s->gb))
1251 // value_type not found, reset the buffer
1252 s->gb.buffer -= strlen(value_name) + 1;
1253 av_log(s->avctx, AV_LOG_WARNING,
1254 "Unknown data type %s for header variable %s.\n",
1255 value_type, value_name);
1262 static int decode_header(EXRContext *s)
1264 int magic_number, version, i, flags, sar = 0;
1266 s->current_channel_offset = 0;
1273 s->channel_offsets[0] = -1;
1274 s->channel_offsets[1] = -1;
1275 s->channel_offsets[2] = -1;
1276 s->channel_offsets[3] = -1;
1277 s->pixel_type = EXR_UNKNOWN;
1278 s->compression = EXR_UNKN;
1282 s->tile_attr.xSize = -1;
1283 s->tile_attr.ySize = -1;
1286 if (bytestream2_get_bytes_left(&s->gb) < 10) {
1287 av_log(s->avctx, AV_LOG_ERROR, "Header too short to parse.\n");
1288 return AVERROR_INVALIDDATA;
1291 magic_number = bytestream2_get_le32(&s->gb);
1292 if (magic_number != 20000630) {
1293 /* As per documentation of OpenEXR, it is supposed to be
1294 * int 20000630 little-endian */
1295 av_log(s->avctx, AV_LOG_ERROR, "Wrong magic number %d.\n", magic_number);
1296 return AVERROR_INVALIDDATA;
1299 version = bytestream2_get_byte(&s->gb);
1301 avpriv_report_missing_feature(s->avctx, "Version %d", version);
1302 return AVERROR_PATCHWELCOME;
1305 flags = bytestream2_get_le24(&s->gb);
1309 else if (flags & 0x02)
1312 avpriv_report_missing_feature(s->avctx, "flags %d", flags);
1313 return AVERROR_PATCHWELCOME;
1317 while (bytestream2_get_bytes_left(&s->gb) > 0 && *s->gb.buffer) {
1319 if ((var_size = check_header_variable(s, "channels",
1320 "chlist", 38)) >= 0) {
1321 GetByteContext ch_gb;
1323 return AVERROR_INVALIDDATA;
1325 bytestream2_init(&ch_gb, s->gb.buffer, var_size);
1327 while (bytestream2_get_bytes_left(&ch_gb) >= 19) {
1328 EXRChannel *channel;
1329 enum ExrPixelType current_pixel_type;
1330 int channel_index = -1;
1333 if (strcmp(s->layer, "") != 0) {
1334 if (strncmp(ch_gb.buffer, s->layer, strlen(s->layer)) == 0) {
1335 ch_gb.buffer += strlen(s->layer);
1336 if (*ch_gb.buffer == '.')
1337 ch_gb.buffer++; /* skip dot if not given */
1338 av_log(s->avctx, AV_LOG_INFO,
1339 "Layer %s.%s matched.\n", s->layer, ch_gb.buffer);
1343 if (!strcmp(ch_gb.buffer, "R") ||
1344 !strcmp(ch_gb.buffer, "X") ||
1345 !strcmp(ch_gb.buffer, "U"))
1347 else if (!strcmp(ch_gb.buffer, "G") ||
1348 !strcmp(ch_gb.buffer, "Y") ||
1349 !strcmp(ch_gb.buffer, "V"))
1351 else if (!strcmp(ch_gb.buffer, "B") ||
1352 !strcmp(ch_gb.buffer, "Z") ||
1353 !strcmp(ch_gb.buffer, "W"))
1355 else if (!strcmp(ch_gb.buffer, "A"))
1358 av_log(s->avctx, AV_LOG_WARNING,
1359 "Unsupported channel %.256s.\n", ch_gb.buffer);
1361 /* skip until you get a 0 */
1362 while (bytestream2_get_bytes_left(&ch_gb) > 0 &&
1363 bytestream2_get_byte(&ch_gb))
1366 if (bytestream2_get_bytes_left(&ch_gb) < 4) {
1367 av_log(s->avctx, AV_LOG_ERROR, "Incomplete header.\n");
1368 return AVERROR_INVALIDDATA;
1371 current_pixel_type = bytestream2_get_le32(&ch_gb);
1372 if (current_pixel_type >= EXR_UNKNOWN) {
1373 avpriv_report_missing_feature(s->avctx, "Pixel type %d",
1374 current_pixel_type);
1375 return AVERROR_PATCHWELCOME;
1378 bytestream2_skip(&ch_gb, 4);
1379 xsub = bytestream2_get_le32(&ch_gb);
1380 ysub = bytestream2_get_le32(&ch_gb);
1381 if (xsub != 1 || ysub != 1) {
1382 avpriv_report_missing_feature(s->avctx,
1383 "Subsampling %dx%d",
1385 return AVERROR_PATCHWELCOME;
1388 if (s->channel_offsets[channel_index] == -1){/* channel have not been previously assign */
1389 if (channel_index >= 0) {
1390 if (s->pixel_type != EXR_UNKNOWN &&
1391 s->pixel_type != current_pixel_type) {
1392 av_log(s->avctx, AV_LOG_ERROR,
1393 "RGB channels not of the same depth.\n");
1394 return AVERROR_INVALIDDATA;
1396 s->pixel_type = current_pixel_type;
1397 s->channel_offsets[channel_index] = s->current_channel_offset;
1401 s->channels = av_realloc(s->channels,
1402 ++s->nb_channels * sizeof(EXRChannel));
1404 return AVERROR(ENOMEM);
1405 channel = &s->channels[s->nb_channels - 1];
1406 channel->pixel_type = current_pixel_type;
1407 channel->xsub = xsub;
1408 channel->ysub = ysub;
1410 s->current_channel_offset += 1 << current_pixel_type;
1413 /* Check if all channels are set with an offset or if the channels
1414 * are causing an overflow */
1415 if (FFMIN3(s->channel_offsets[0],
1416 s->channel_offsets[1],
1417 s->channel_offsets[2]) < 0) {
1418 if (s->channel_offsets[0] < 0)
1419 av_log(s->avctx, AV_LOG_ERROR, "Missing red channel.\n");
1420 if (s->channel_offsets[1] < 0)
1421 av_log(s->avctx, AV_LOG_ERROR, "Missing green channel.\n");
1422 if (s->channel_offsets[2] < 0)
1423 av_log(s->avctx, AV_LOG_ERROR, "Missing blue channel.\n");
1424 return AVERROR_INVALIDDATA;
1427 // skip one last byte and update main gb
1428 s->gb.buffer = ch_gb.buffer + 1;
1430 } else if ((var_size = check_header_variable(s, "dataWindow", "box2i",
1433 return AVERROR_INVALIDDATA;
1435 s->xmin = bytestream2_get_le32(&s->gb);
1436 s->ymin = bytestream2_get_le32(&s->gb);
1437 s->xmax = bytestream2_get_le32(&s->gb);
1438 s->ymax = bytestream2_get_le32(&s->gb);
1439 s->xdelta = (s->xmax - s->xmin) + 1;
1440 s->ydelta = (s->ymax - s->ymin) + 1;
1443 } else if ((var_size = check_header_variable(s, "displayWindow",
1444 "box2i", 34)) >= 0) {
1446 return AVERROR_INVALIDDATA;
1448 bytestream2_skip(&s->gb, 8);
1449 s->w = bytestream2_get_le32(&s->gb) + 1;
1450 s->h = bytestream2_get_le32(&s->gb) + 1;
1453 } else if ((var_size = check_header_variable(s, "lineOrder",
1454 "lineOrder", 25)) >= 0) {
1457 return AVERROR_INVALIDDATA;
1459 line_order = bytestream2_get_byte(&s->gb);
1460 av_log(s->avctx, AV_LOG_DEBUG, "line order: %d.\n", line_order);
1461 if (line_order > 2) {
1462 av_log(s->avctx, AV_LOG_ERROR, "Unknown line order.\n");
1463 return AVERROR_INVALIDDATA;
1467 } else if ((var_size = check_header_variable(s, "pixelAspectRatio",
1468 "float", 31)) >= 0) {
1470 return AVERROR_INVALIDDATA;
1472 sar = bytestream2_get_le32(&s->gb);
1475 } else if ((var_size = check_header_variable(s, "compression",
1476 "compression", 29)) >= 0) {
1478 return AVERROR_INVALIDDATA;
1480 if (s->compression == EXR_UNKN)
1481 s->compression = bytestream2_get_byte(&s->gb);
1483 av_log(s->avctx, AV_LOG_WARNING,
1484 "Found more than one compression attribute.\n");
1487 } else if ((var_size = check_header_variable(s, "tiles",
1488 "tiledesc", 22)) >= 0) {
1492 av_log(s->avctx, AV_LOG_WARNING,
1493 "Found tile attribute and scanline flags. Exr will be interpreted as scanline.\n");
1495 s->tile_attr.xSize = bytestream2_get_le32(&s->gb);
1496 s->tile_attr.ySize = bytestream2_get_le32(&s->gb);
1498 tileLevel = bytestream2_get_byte(&s->gb);
1499 s->tile_attr.level_mode = tileLevel & 0x0f;
1500 s->tile_attr.level_round = (tileLevel >> 4) & 0x0f;
1502 if (s->tile_attr.level_mode >= EXR_TILE_LEVEL_UNKNOWN){
1503 avpriv_report_missing_feature(s->avctx, "Tile level mode %d",
1504 s->tile_attr.level_mode);
1505 return AVERROR_PATCHWELCOME;
1508 if (s->tile_attr.level_round >= EXR_TILE_ROUND_UNKNOWN) {
1509 avpriv_report_missing_feature(s->avctx, "Tile level round %d",
1510 s->tile_attr.level_round);
1511 return AVERROR_PATCHWELCOME;
1517 // Check if there are enough bytes for a header
1518 if (bytestream2_get_bytes_left(&s->gb) <= 9) {
1519 av_log(s->avctx, AV_LOG_ERROR, "Incomplete header\n");
1520 return AVERROR_INVALIDDATA;
1523 // Process unknown variables
1524 for (i = 0; i < 2; i++) // value_name and value_type
1525 while (bytestream2_get_byte(&s->gb) != 0);
1527 // Skip variable length
1528 bytestream2_skip(&s->gb, bytestream2_get_le32(&s->gb));
1531 ff_set_sar(s->avctx, av_d2q(av_int2float(sar), 255));
1533 if (s->compression == EXR_UNKN) {
1534 av_log(s->avctx, AV_LOG_ERROR, "Missing compression attribute.\n");
1535 return AVERROR_INVALIDDATA;
1539 if (s->tile_attr.xSize < 1 || s->tile_attr.ySize < 1) {
1540 av_log(s->avctx, AV_LOG_ERROR, "Invalid tile attribute.\n");
1541 return AVERROR_INVALIDDATA;
1545 s->scan_line_size = s->xdelta * s->current_channel_offset;
1547 if (bytestream2_get_bytes_left(&s->gb) <= 0) {
1548 av_log(s->avctx, AV_LOG_ERROR, "Incomplete frame.\n");
1549 return AVERROR_INVALIDDATA;
1552 // aaand we are done
1553 bytestream2_skip(&s->gb, 1);
1557 static int decode_frame(AVCodecContext *avctx, void *data,
1558 int *got_frame, AVPacket *avpkt)
1560 EXRContext *s = avctx->priv_data;
1561 ThreadFrame frame = { .f = data };
1562 AVFrame *picture = data;
1567 int nb_blocks;/* nb scanline or nb tile */
1569 bytestream2_init(&s->gb, avpkt->data, avpkt->size);
1571 if ((ret = decode_header(s)) < 0)
1574 switch (s->pixel_type) {
1577 if (s->channel_offsets[3] >= 0)
1578 avctx->pix_fmt = AV_PIX_FMT_RGBA64;
1580 avctx->pix_fmt = AV_PIX_FMT_RGB48;
1583 avpriv_request_sample(avctx, "32-bit unsigned int");
1584 return AVERROR_PATCHWELCOME;
1586 av_log(avctx, AV_LOG_ERROR, "Missing channel list.\n");
1587 return AVERROR_INVALIDDATA;
1590 if (s->apply_trc_type != AVCOL_TRC_UNSPECIFIED)
1591 avctx->color_trc = s->apply_trc_type;
1593 switch (s->compression) {
1597 s->scan_lines_per_block = 1;
1601 s->scan_lines_per_block = 16;
1606 s->scan_lines_per_block = 32;
1609 avpriv_report_missing_feature(avctx, "Compression %d", s->compression);
1610 return AVERROR_PATCHWELCOME;
1613 /* Verify the xmin, xmax, ymin, ymax and xdelta before setting
1614 * the actual image size. */
1615 if (s->xmin > s->xmax ||
1616 s->ymin > s->ymax ||
1617 s->xdelta != s->xmax - s->xmin + 1 ||
1620 av_log(avctx, AV_LOG_ERROR, "Wrong or missing size information.\n");
1621 return AVERROR_INVALIDDATA;
1624 if ((ret = ff_set_dimensions(avctx, s->w, s->h)) < 0)
1627 s->desc = av_pix_fmt_desc_get(avctx->pix_fmt);
1629 return AVERROR_INVALIDDATA;
1630 out_line_size = avctx->width * 2 * s->desc->nb_components;
1633 nb_blocks = ((s->xdelta + s->tile_attr.xSize - 1) / s->tile_attr.xSize) *
1634 ((s->ydelta + s->tile_attr.ySize - 1) / s->tile_attr.ySize);
1635 } else { /* scanline */
1636 nb_blocks = (s->ydelta + s->scan_lines_per_block - 1) /
1637 s->scan_lines_per_block;
1640 if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
1643 if (bytestream2_get_bytes_left(&s->gb) < nb_blocks * 8)
1644 return AVERROR_INVALIDDATA;
1646 // save pointer we are going to use in decode_block
1647 s->buf = avpkt->data;
1648 s->buf_size = avpkt->size;
1649 ptr = picture->data[0];
1651 // Zero out the start if ymin is not 0
1652 for (y = 0; y < s->ymin; y++) {
1653 memset(ptr, 0, out_line_size);
1654 ptr += picture->linesize[0];
1657 s->picture = picture;
1659 avctx->execute2(avctx, decode_block, s->thread_data, NULL, nb_blocks);
1661 // Zero out the end if ymax+1 is not h
1662 for (y = s->ymax + 1; y < avctx->height; y++) {
1663 memset(ptr, 0, out_line_size);
1664 ptr += picture->linesize[0];
1667 picture->pict_type = AV_PICTURE_TYPE_I;
1673 static av_cold int decode_init(AVCodecContext *avctx)
1675 EXRContext *s = avctx->priv_data;
1677 union av_intfloat32 t;
1678 float one_gamma = 1.0f / s->gamma;
1679 avpriv_trc_function trc_func = NULL;
1683 trc_func = avpriv_get_trc_function_from_trc(s->apply_trc_type);
1685 for (i = 0; i < 65536; ++i) {
1686 t = exr_half2float(i);
1687 t.f = trc_func(t.f);
1688 s->gamma_table[i] = exr_flt2uint(t.i);
1691 if (one_gamma > 0.9999f && one_gamma < 1.0001f) {
1692 for (i = 0; i < 65536; ++i)
1693 s->gamma_table[i] = exr_halflt2uint(i);
1695 for (i = 0; i < 65536; ++i) {
1696 t = exr_half2float(i);
1697 /* If negative value we reuse half value */
1699 s->gamma_table[i] = exr_halflt2uint(i);
1701 t.f = powf(t.f, one_gamma);
1702 s->gamma_table[i] = exr_flt2uint(t.i);
1708 // allocate thread data, used for non EXR_RAW compreesion types
1709 s->thread_data = av_mallocz_array(avctx->thread_count, sizeof(EXRThreadData));
1710 if (!s->thread_data)
1711 return AVERROR_INVALIDDATA;
1717 static int decode_init_thread_copy(AVCodecContext *avctx)
1718 { EXRContext *s = avctx->priv_data;
1720 // allocate thread data, used for non EXR_RAW compreesion types
1721 s->thread_data = av_mallocz_array(avctx->thread_count, sizeof(EXRThreadData));
1722 if (!s->thread_data)
1723 return AVERROR_INVALIDDATA;
1729 static av_cold int decode_end(AVCodecContext *avctx)
1731 EXRContext *s = avctx->priv_data;
1733 for (i = 0; i < avctx->thread_count; i++) {
1734 EXRThreadData *td = &s->thread_data[i];
1735 av_freep(&td->uncompressed_data);
1737 av_freep(&td->bitmap);
1741 av_freep(&s->thread_data);
1742 av_freep(&s->channels);
1747 #define OFFSET(x) offsetof(EXRContext, x)
1748 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1749 static const AVOption options[] = {
1750 { "layer", "Set the decoding layer", OFFSET(layer),
1751 AV_OPT_TYPE_STRING, { .str = "" }, 0, 0, VD },
1752 { "gamma", "Set the float gamma value when decoding", OFFSET(gamma),
1753 AV_OPT_TYPE_FLOAT, { .dbl = 1.0f }, 0.001, FLT_MAX, VD },
1755 // XXX: Note the abuse of the enum using AVCOL_TRC_UNSPECIFIED to subsume the existing gamma option
1756 { "apply_trc", "color transfer characteristics to apply to EXR linear input", OFFSET(apply_trc_type),
1757 AV_OPT_TYPE_INT, {.i64 = AVCOL_TRC_UNSPECIFIED }, 1, AVCOL_TRC_NB-1, VD, "apply_trc_type"},
1758 { "bt709", "BT.709", 0,
1759 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_BT709 }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1760 { "gamma", "gamma", 0,
1761 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_UNSPECIFIED }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1762 { "gamma22", "BT.470 M", 0,
1763 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_GAMMA22 }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1764 { "gamma28", "BT.470 BG", 0,
1765 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_GAMMA28 }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1766 { "smpte170m", "SMPTE 170 M", 0,
1767 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_SMPTE170M }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1768 { "smpte240m", "SMPTE 240 M", 0,
1769 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_SMPTE240M }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1770 { "linear", "Linear", 0,
1771 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_LINEAR }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1773 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_LOG }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1774 { "log_sqrt", "Log square root", 0,
1775 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_LOG_SQRT }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1776 { "iec61966_2_4", "IEC 61966-2-4", 0,
1777 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_IEC61966_2_4 }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1778 { "bt1361", "BT.1361", 0,
1779 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_BT1361_ECG }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1780 { "iec61966_2_1", "IEC 61966-2-1", 0,
1781 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_IEC61966_2_1 }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1782 { "bt2020_10bit", "BT.2020 - 10 bit", 0,
1783 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_BT2020_10 }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1784 { "bt2020_12bit", "BT.2020 - 12 bit", 0,
1785 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_BT2020_12 }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1786 { "smpte2084", "SMPTE ST 2084", 0,
1787 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_SMPTEST2084 }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1788 { "smpte428_1", "SMPTE ST 428-1", 0,
1789 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_SMPTEST428_1 }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1794 static const AVClass exr_class = {
1795 .class_name = "EXR",
1796 .item_name = av_default_item_name,
1798 .version = LIBAVUTIL_VERSION_INT,
1801 AVCodec ff_exr_decoder = {
1803 .long_name = NULL_IF_CONFIG_SMALL("OpenEXR image"),
1804 .type = AVMEDIA_TYPE_VIDEO,
1805 .id = AV_CODEC_ID_EXR,
1806 .priv_data_size = sizeof(EXRContext),
1807 .init = decode_init,
1808 .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
1809 .close = decode_end,
1810 .decode = decode_frame,
1811 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS |
1812 AV_CODEC_CAP_SLICE_THREADS,
1813 .priv_class = &exr_class,