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;
196 mantissa <<= 13; // preserve half-float NaN bits if set
197 } else if (exp == 0x0) {
198 // convert half-float zero/denorm to single precision value
201 exp = HALF_FLOAT_MIN_BIASED_EXP_AS_SINGLE_FP_EXP;
202 // check for leading 1 in denorm mantissa
203 while (!(mantissa & (1 << 10))) {
204 // for every leading 0, decrement single precision exponent by 1
205 // and shift half-float mantissa value to the left
209 // clamp the mantissa to 10 bits
210 mantissa &= ((1 << 10) - 1);
211 // shift left to generate single-precision mantissa of 23 bits
215 // shift left to generate single-precision mantissa of 23 bits
217 // generate single precision biased exponent value
218 exp = (exp << 13) + HALF_FLOAT_MIN_BIASED_EXP_AS_SINGLE_FP_EXP;
221 f.i = (sign << 31) | exp | mantissa;
226 static int zip_uncompress(EXRContext *s, const uint8_t *src, int compressed_size,
227 int uncompressed_size, EXRThreadData *td)
229 unsigned long dest_len = uncompressed_size;
231 if (uncompress(td->tmp, &dest_len, src, compressed_size) != Z_OK ||
232 dest_len != uncompressed_size)
233 return AVERROR_INVALIDDATA;
235 av_assert1(uncompressed_size % 2 == 0);
237 s->dsp.predictor(td->tmp, uncompressed_size);
238 s->dsp.reorder_pixels(td->uncompressed_data, td->tmp, uncompressed_size);
243 static int rle_uncompress(EXRContext *ctx, const uint8_t *src, int compressed_size,
244 int uncompressed_size, EXRThreadData *td)
246 uint8_t *d = td->tmp;
247 const int8_t *s = src;
248 int ssize = compressed_size;
249 int dsize = uncompressed_size;
250 uint8_t *dend = d + dsize;
259 if ((dsize -= count) < 0 ||
260 (ssize -= count + 1) < 0)
261 return AVERROR_INVALIDDATA;
268 if ((dsize -= count) < 0 ||
270 return AVERROR_INVALIDDATA;
280 return AVERROR_INVALIDDATA;
282 av_assert1(uncompressed_size % 2 == 0);
284 ctx->dsp.predictor(td->tmp, uncompressed_size);
285 ctx->dsp.reorder_pixels(td->uncompressed_data, td->tmp, uncompressed_size);
290 #define USHORT_RANGE (1 << 16)
291 #define BITMAP_SIZE (1 << 13)
293 static uint16_t reverse_lut(const uint8_t *bitmap, uint16_t *lut)
297 for (i = 0; i < USHORT_RANGE; i++)
298 if ((i == 0) || (bitmap[i >> 3] & (1 << (i & 7))))
303 memset(lut + k, 0, (USHORT_RANGE - k) * 2);
308 static void apply_lut(const uint16_t *lut, uint16_t *dst, int dsize)
312 for (i = 0; i < dsize; ++i)
313 dst[i] = lut[dst[i]];
316 #define HUF_ENCBITS 16 // literal (value) bit length
317 #define HUF_DECBITS 14 // decoding bit size (>= 8)
319 #define HUF_ENCSIZE ((1 << HUF_ENCBITS) + 1) // encoding table size
320 #define HUF_DECSIZE (1 << HUF_DECBITS) // decoding table size
321 #define HUF_DECMASK (HUF_DECSIZE - 1)
323 typedef struct HufDec {
329 static void huf_canonical_code_table(uint64_t *hcode)
331 uint64_t c, n[59] = { 0 };
334 for (i = 0; i < HUF_ENCSIZE; ++i)
338 for (i = 58; i > 0; --i) {
339 uint64_t nc = ((c + n[i]) >> 1);
344 for (i = 0; i < HUF_ENCSIZE; ++i) {
348 hcode[i] = l | (n[l]++ << 6);
352 #define SHORT_ZEROCODE_RUN 59
353 #define LONG_ZEROCODE_RUN 63
354 #define SHORTEST_LONG_RUN (2 + LONG_ZEROCODE_RUN - SHORT_ZEROCODE_RUN)
355 #define LONGEST_LONG_RUN (255 + SHORTEST_LONG_RUN)
357 static int huf_unpack_enc_table(GetByteContext *gb,
358 int32_t im, int32_t iM, uint64_t *hcode)
361 int ret = init_get_bits8(&gbit, gb->buffer, bytestream2_get_bytes_left(gb));
365 for (; im <= iM; im++) {
366 uint64_t l = hcode[im] = get_bits(&gbit, 6);
368 if (l == LONG_ZEROCODE_RUN) {
369 int zerun = get_bits(&gbit, 8) + SHORTEST_LONG_RUN;
371 if (im + zerun > iM + 1)
372 return AVERROR_INVALIDDATA;
378 } else if (l >= SHORT_ZEROCODE_RUN) {
379 int zerun = l - SHORT_ZEROCODE_RUN + 2;
381 if (im + zerun > iM + 1)
382 return AVERROR_INVALIDDATA;
391 bytestream2_skip(gb, (get_bits_count(&gbit) + 7) / 8);
392 huf_canonical_code_table(hcode);
397 static int huf_build_dec_table(const uint64_t *hcode, int im,
398 int iM, HufDec *hdecod)
400 for (; im <= iM; im++) {
401 uint64_t c = hcode[im] >> 6;
402 int i, l = hcode[im] & 63;
405 return AVERROR_INVALIDDATA;
407 if (l > HUF_DECBITS) {
408 HufDec *pl = hdecod + (c >> (l - HUF_DECBITS));
410 return AVERROR_INVALIDDATA;
414 pl->p = av_realloc(pl->p, pl->lit * sizeof(int));
416 return AVERROR(ENOMEM);
418 pl->p[pl->lit - 1] = im;
420 HufDec *pl = hdecod + (c << (HUF_DECBITS - l));
422 for (i = 1 << (HUF_DECBITS - l); i > 0; i--, pl++) {
423 if (pl->len || pl->p)
424 return AVERROR_INVALIDDATA;
434 #define get_char(c, lc, gb) \
436 c = (c << 8) | bytestream2_get_byte(gb); \
440 #define get_code(po, rlc, c, lc, gb, out, oe, outb) \
444 get_char(c, lc, gb); \
449 if (out + cs > oe || out == outb) \
450 return AVERROR_INVALIDDATA; \
456 } else if (out < oe) { \
459 return AVERROR_INVALIDDATA; \
463 static int huf_decode(const uint64_t *hcode, const HufDec *hdecod,
464 GetByteContext *gb, int nbits,
465 int rlc, int no, uint16_t *out)
468 uint16_t *outb = out;
469 uint16_t *oe = out + no;
470 const uint8_t *ie = gb->buffer + (nbits + 7) / 8; // input byte size
475 while (gb->buffer < ie) {
478 while (lc >= HUF_DECBITS) {
479 const HufDec pl = hdecod[(c >> (lc - HUF_DECBITS)) & HUF_DECMASK];
483 get_code(pl.lit, rlc, c, lc, gb, out, oe, outb);
488 return AVERROR_INVALIDDATA;
490 for (j = 0; j < pl.lit; j++) {
491 int l = hcode[pl.p[j]] & 63;
493 while (lc < l && bytestream2_get_bytes_left(gb) > 0)
497 if ((hcode[pl.p[j]] >> 6) ==
498 ((c >> (lc - l)) & ((1LL << l) - 1))) {
500 get_code(pl.p[j], rlc, c, lc, gb, out, oe, outb);
507 return AVERROR_INVALIDDATA;
517 const HufDec pl = hdecod[(c << (HUF_DECBITS - lc)) & HUF_DECMASK];
519 if (pl.len && lc >= pl.len) {
521 get_code(pl.lit, rlc, c, lc, gb, out, oe, outb);
523 return AVERROR_INVALIDDATA;
527 if (out - outb != no)
528 return AVERROR_INVALIDDATA;
532 static int huf_uncompress(GetByteContext *gb,
533 uint16_t *dst, int dst_size)
535 int32_t src_size, im, iM;
541 src_size = bytestream2_get_le32(gb);
542 im = bytestream2_get_le32(gb);
543 iM = bytestream2_get_le32(gb);
544 bytestream2_skip(gb, 4);
545 nBits = bytestream2_get_le32(gb);
546 if (im < 0 || im >= HUF_ENCSIZE ||
547 iM < 0 || iM >= HUF_ENCSIZE ||
549 return AVERROR_INVALIDDATA;
551 bytestream2_skip(gb, 4);
553 freq = av_mallocz_array(HUF_ENCSIZE, sizeof(*freq));
554 hdec = av_mallocz_array(HUF_DECSIZE, sizeof(*hdec));
555 if (!freq || !hdec) {
556 ret = AVERROR(ENOMEM);
560 if ((ret = huf_unpack_enc_table(gb, im, iM, freq)) < 0)
563 if (nBits > 8 * bytestream2_get_bytes_left(gb)) {
564 ret = AVERROR_INVALIDDATA;
568 if ((ret = huf_build_dec_table(freq, im, iM, hdec)) < 0)
570 ret = huf_decode(freq, hdec, gb, nBits, iM, dst_size, dst);
573 for (i = 0; i < HUF_DECSIZE; i++)
575 av_freep(&hdec[i].p);
583 static inline void wdec14(uint16_t l, uint16_t h, uint16_t *a, uint16_t *b)
588 int ai = ls + (hi & 1) + (hi >> 1);
590 int16_t bs = ai - hi;
597 #define A_OFFSET (1 << (NBITS - 1))
598 #define MOD_MASK ((1 << NBITS) - 1)
600 static inline void wdec16(uint16_t l, uint16_t h, uint16_t *a, uint16_t *b)
604 int bb = (m - (d >> 1)) & MOD_MASK;
605 int aa = (d + bb - A_OFFSET) & MOD_MASK;
610 static void wav_decode(uint16_t *in, int nx, int ox,
611 int ny, int oy, uint16_t mx)
613 int w14 = (mx < (1 << 14));
614 int n = (nx > ny) ? ny : nx;
627 uint16_t *ey = in + oy * (ny - p2);
628 uint16_t i00, i01, i10, i11;
634 for (; py <= ey; py += oy2) {
636 uint16_t *ex = py + ox * (nx - p2);
638 for (; px <= ex; px += ox2) {
639 uint16_t *p01 = px + ox1;
640 uint16_t *p10 = px + oy1;
641 uint16_t *p11 = p10 + ox1;
644 wdec14(*px, *p10, &i00, &i10);
645 wdec14(*p01, *p11, &i01, &i11);
646 wdec14(i00, i01, px, p01);
647 wdec14(i10, i11, p10, p11);
649 wdec16(*px, *p10, &i00, &i10);
650 wdec16(*p01, *p11, &i01, &i11);
651 wdec16(i00, i01, px, p01);
652 wdec16(i10, i11, p10, p11);
657 uint16_t *p10 = px + oy1;
660 wdec14(*px, *p10, &i00, p10);
662 wdec16(*px, *p10, &i00, p10);
670 uint16_t *ex = py + ox * (nx - p2);
672 for (; px <= ex; px += ox2) {
673 uint16_t *p01 = px + ox1;
676 wdec14(*px, *p01, &i00, p01);
678 wdec16(*px, *p01, &i00, p01);
689 static int piz_uncompress(EXRContext *s, const uint8_t *src, int ssize,
690 int dsize, EXRThreadData *td)
693 uint16_t maxval, min_non_zero, max_non_zero;
695 uint16_t *tmp = (uint16_t *)td->tmp;
699 int pixel_half_size;/* 1 for half, 2 for float and uint32 */
704 td->bitmap = av_malloc(BITMAP_SIZE);
706 td->lut = av_malloc(1 << 17);
707 if (!td->bitmap || !td->lut) {
708 av_freep(&td->bitmap);
710 return AVERROR(ENOMEM);
713 bytestream2_init(&gb, src, ssize);
714 min_non_zero = bytestream2_get_le16(&gb);
715 max_non_zero = bytestream2_get_le16(&gb);
717 if (max_non_zero >= BITMAP_SIZE)
718 return AVERROR_INVALIDDATA;
720 memset(td->bitmap, 0, FFMIN(min_non_zero, BITMAP_SIZE));
721 if (min_non_zero <= max_non_zero)
722 bytestream2_get_buffer(&gb, td->bitmap + min_non_zero,
723 max_non_zero - min_non_zero + 1);
724 memset(td->bitmap + max_non_zero + 1, 0, BITMAP_SIZE - max_non_zero - 1);
726 maxval = reverse_lut(td->bitmap, td->lut);
728 ret = huf_uncompress(&gb, tmp, dsize / sizeof(uint16_t));
733 for (i = 0; i < s->nb_channels; i++) {
734 channel = &s->channels[i];
736 if (channel->pixel_type == EXR_HALF)
741 for (j = 0; j < pixel_half_size; j++)
742 wav_decode(ptr + j, td->xsize, pixel_half_size, td->ysize,
743 td->xsize * pixel_half_size, maxval);
744 ptr += td->xsize * td->ysize * pixel_half_size;
747 apply_lut(td->lut, tmp, dsize / sizeof(uint16_t));
749 out = (uint16_t *)td->uncompressed_data;
750 for (i = 0; i < td->ysize; i++) {
752 for (j = 0; j < s->nb_channels; j++) {
753 channel = &s->channels[j];
754 if (channel->pixel_type == EXR_HALF)
759 in = tmp + tmp_offset * td->xsize * td->ysize + i * td->xsize * pixel_half_size;
760 tmp_offset += pixel_half_size;
763 s->bbdsp.bswap16_buf(out, in, td->xsize * pixel_half_size);
765 memcpy(out, in, td->xsize * 2 * pixel_half_size);
767 out += td->xsize * pixel_half_size;
774 static int pxr24_uncompress(EXRContext *s, const uint8_t *src,
775 int compressed_size, int uncompressed_size,
778 unsigned long dest_len, expected_len = 0;
779 const uint8_t *in = td->tmp;
783 for (i = 0; i < s->nb_channels; i++) {
784 if (s->channels[i].pixel_type == EXR_FLOAT) {
785 expected_len += (td->xsize * td->ysize * 3);/* PRX 24 store float in 24 bit instead of 32 */
786 } else if (s->channels[i].pixel_type == EXR_HALF) {
787 expected_len += (td->xsize * td->ysize * 2);
789 expected_len += (td->xsize * td->ysize * 4);
793 dest_len = expected_len;
795 if (uncompress(td->tmp, &dest_len, src, compressed_size) != Z_OK) {
796 return AVERROR_INVALIDDATA;
797 } else if (dest_len != expected_len) {
798 return AVERROR_INVALIDDATA;
801 out = td->uncompressed_data;
802 for (i = 0; i < td->ysize; i++)
803 for (c = 0; c < s->nb_channels; c++) {
804 EXRChannel *channel = &s->channels[c];
805 const uint8_t *ptr[4];
808 switch (channel->pixel_type) {
811 ptr[1] = ptr[0] + td->xsize;
812 ptr[2] = ptr[1] + td->xsize;
813 in = ptr[2] + td->xsize;
815 for (j = 0; j < td->xsize; ++j) {
816 uint32_t diff = ((unsigned)*(ptr[0]++) << 24) |
817 (*(ptr[1]++) << 16) |
820 bytestream_put_le32(&out, pixel);
825 ptr[1] = ptr[0] + td->xsize;
826 in = ptr[1] + td->xsize;
827 for (j = 0; j < td->xsize; j++) {
828 uint32_t diff = (*(ptr[0]++) << 8) | *(ptr[1]++);
831 bytestream_put_le16(&out, pixel);
836 ptr[1] = ptr[0] + s->xdelta;
837 ptr[2] = ptr[1] + s->xdelta;
838 ptr[3] = ptr[2] + s->xdelta;
839 in = ptr[3] + s->xdelta;
841 for (j = 0; j < s->xdelta; ++j) {
842 uint32_t diff = ((uint32_t)*(ptr[0]++) << 24) |
843 (*(ptr[1]++) << 16) |
844 (*(ptr[2]++) << 8 ) |
847 bytestream_put_le32(&out, pixel);
851 return AVERROR_INVALIDDATA;
858 static void unpack_14(const uint8_t b[14], uint16_t s[16])
860 unsigned short shift = (b[ 2] >> 2) & 15;
861 unsigned short bias = (0x20 << shift);
864 s[ 0] = (b[0] << 8) | b[1];
866 s[ 4] = s[ 0] + ((((b[ 2] << 4) | (b[ 3] >> 4)) & 0x3f) << shift) - bias;
867 s[ 8] = s[ 4] + ((((b[ 3] << 2) | (b[ 4] >> 6)) & 0x3f) << shift) - bias;
868 s[12] = s[ 8] + ((b[ 4] & 0x3f) << shift) - bias;
870 s[ 1] = s[ 0] + ((b[ 5] >> 2) << shift) - bias;
871 s[ 5] = s[ 4] + ((((b[ 5] << 4) | (b[ 6] >> 4)) & 0x3f) << shift) - bias;
872 s[ 9] = s[ 8] + ((((b[ 6] << 2) | (b[ 7] >> 6)) & 0x3f) << shift) - bias;
873 s[13] = s[12] + ((b[ 7] & 0x3f) << shift) - bias;
875 s[ 2] = s[ 1] + ((b[ 8] >> 2) << shift) - bias;
876 s[ 6] = s[ 5] + ((((b[ 8] << 4) | (b[ 9] >> 4)) & 0x3f) << shift) - bias;
877 s[10] = s[ 9] + ((((b[ 9] << 2) | (b[10] >> 6)) & 0x3f) << shift) - bias;
878 s[14] = s[13] + ((b[10] & 0x3f) << shift) - bias;
880 s[ 3] = s[ 2] + ((b[11] >> 2) << shift) - bias;
881 s[ 7] = s[ 6] + ((((b[11] << 4) | (b[12] >> 4)) & 0x3f) << shift) - bias;
882 s[11] = s[10] + ((((b[12] << 2) | (b[13] >> 6)) & 0x3f) << shift) - bias;
883 s[15] = s[14] + ((b[13] & 0x3f) << shift) - bias;
885 for (i = 0; i < 16; ++i) {
893 static void unpack_3(const uint8_t b[3], uint16_t s[16])
897 s[0] = (b[0] << 8) | b[1];
904 for (i = 1; i < 16; i++)
909 static int b44_uncompress(EXRContext *s, const uint8_t *src, int compressed_size,
910 int uncompressed_size, EXRThreadData *td) {
911 const int8_t *sr = src;
912 int stay_to_uncompress = compressed_size;
913 int nb_b44_block_w, nb_b44_block_h;
914 int index_tl_x, index_tl_y, index_out, index_tmp;
915 uint16_t tmp_buffer[16]; /* B44 use 4x4 half float pixel */
917 int target_channel_offset = 0;
919 /* calc B44 block count */
920 nb_b44_block_w = td->xsize / 4;
921 if ((td->xsize % 4) != 0)
924 nb_b44_block_h = td->ysize / 4;
925 if ((td->ysize % 4) != 0)
928 for (c = 0; c < s->nb_channels; c++) {
929 if (s->channels[c].pixel_type == EXR_HALF) {/* B44 only compress half float data */
930 for (iY = 0; iY < nb_b44_block_h; iY++) {
931 for (iX = 0; iX < nb_b44_block_w; iX++) {/* For each B44 block */
932 if (stay_to_uncompress < 3) {
933 av_log(s, AV_LOG_ERROR, "Not enough data for B44A block: %d", stay_to_uncompress);
934 return AVERROR_INVALIDDATA;
937 if (src[compressed_size - stay_to_uncompress + 2] == 0xfc) { /* B44A block */
938 unpack_3(sr, tmp_buffer);
940 stay_to_uncompress -= 3;
941 } else {/* B44 Block */
942 if (stay_to_uncompress < 14) {
943 av_log(s, AV_LOG_ERROR, "Not enough data for B44 block: %d", stay_to_uncompress);
944 return AVERROR_INVALIDDATA;
946 unpack_14(sr, tmp_buffer);
948 stay_to_uncompress -= 14;
951 /* copy data to uncompress buffer (B44 block can exceed target resolution)*/
955 for (y = index_tl_y; y < FFMIN(index_tl_y + 4, td->ysize); y++) {
956 for (x = index_tl_x; x < FFMIN(index_tl_x + 4, td->xsize); x++) {
957 index_out = target_channel_offset * td->xsize + y * td->channel_line_size + 2 * x;
958 index_tmp = (y-index_tl_y) * 4 + (x-index_tl_x);
959 td->uncompressed_data[index_out] = tmp_buffer[index_tmp] & 0xff;
960 td->uncompressed_data[index_out + 1] = tmp_buffer[index_tmp] >> 8;
965 target_channel_offset += 2;
966 } else {/* Float or UINT 32 channel */
967 if (stay_to_uncompress < td->ysize * td->xsize * 4) {
968 av_log(s, AV_LOG_ERROR, "Not enough data for uncompress channel: %d", stay_to_uncompress);
969 return AVERROR_INVALIDDATA;
972 for (y = 0; y < td->ysize; y++) {
973 index_out = target_channel_offset * td->xsize + y * td->channel_line_size;
974 memcpy(&td->uncompressed_data[index_out], sr, td->xsize * 4);
977 target_channel_offset += 4;
979 stay_to_uncompress -= td->ysize * td->xsize * 4;
986 static int decode_block(AVCodecContext *avctx, void *tdata,
987 int jobnr, int threadnr)
989 EXRContext *s = avctx->priv_data;
990 AVFrame *const p = s->picture;
991 EXRThreadData *td = &s->thread_data[threadnr];
992 const uint8_t *channel_buffer[4] = { 0 };
993 const uint8_t *buf = s->buf;
994 uint64_t line_offset, uncompressed_size;
998 uint64_t tile_x, tile_y, tile_level_x, tile_level_y;
1000 int step = s->desc->flags & AV_PIX_FMT_FLAG_FLOAT ? 4 : 2 * s->desc->nb_components;
1001 int bxmin = 0, axmax = 0, window_xoffset = 0;
1002 int window_xmin, window_xmax, window_ymin, window_ymax;
1003 int data_xoffset, data_yoffset, data_window_offset, xsize, ysize;
1004 int i, x, buf_size = s->buf_size;
1005 int c, rgb_channel_count;
1006 float one_gamma = 1.0f / s->gamma;
1007 avpriv_trc_function trc_func = avpriv_get_trc_function_from_trc(s->apply_trc_type);
1010 line_offset = AV_RL64(s->gb.buffer + jobnr * 8);
1013 if (buf_size < 20 || line_offset > buf_size - 20)
1014 return AVERROR_INVALIDDATA;
1016 src = buf + line_offset + 20;
1018 tile_x = AV_RL32(src - 20);
1019 tile_y = AV_RL32(src - 16);
1020 tile_level_x = AV_RL32(src - 12);
1021 tile_level_y = AV_RL32(src - 8);
1023 data_size = AV_RL32(src - 4);
1024 if (data_size <= 0 || data_size > buf_size - line_offset - 20)
1025 return AVERROR_INVALIDDATA;
1027 if (tile_level_x || tile_level_y) { /* tile level, is not the full res level */
1028 avpriv_report_missing_feature(s->avctx, "Subres tile before full res tile");
1029 return AVERROR_PATCHWELCOME;
1032 line = s->ymin + s->tile_attr.ySize * tile_y;
1033 col = s->tile_attr.xSize * tile_x;
1035 if (line < s->ymin || line > s->ymax ||
1036 s->xmin + col < s->xmin || s->xmin + col > s->xmax)
1037 return AVERROR_INVALIDDATA;
1039 td->ysize = FFMIN(s->tile_attr.ySize, s->ydelta - tile_y * s->tile_attr.ySize);
1040 td->xsize = FFMIN(s->tile_attr.xSize, s->xdelta - tile_x * s->tile_attr.xSize);
1042 if (td->xsize * (uint64_t)s->current_channel_offset > INT_MAX)
1043 return AVERROR_INVALIDDATA;
1045 td->channel_line_size = td->xsize * s->current_channel_offset;/* uncompress size of one line */
1046 uncompressed_size = td->channel_line_size * (uint64_t)td->ysize;/* uncompress size of the block */
1048 if (buf_size < 8 || line_offset > buf_size - 8)
1049 return AVERROR_INVALIDDATA;
1051 src = buf + line_offset + 8;
1052 line = AV_RL32(src - 8);
1054 if (line < s->ymin || line > s->ymax)
1055 return AVERROR_INVALIDDATA;
1057 data_size = AV_RL32(src - 4);
1058 if (data_size <= 0 || data_size > buf_size - line_offset - 8)
1059 return AVERROR_INVALIDDATA;
1061 td->ysize = FFMIN(s->scan_lines_per_block, s->ymax - line + 1); /* s->ydelta - line ?? */
1062 td->xsize = s->xdelta;
1064 if (td->xsize * (uint64_t)s->current_channel_offset > INT_MAX)
1065 return AVERROR_INVALIDDATA;
1067 td->channel_line_size = td->xsize * s->current_channel_offset;/* uncompress size of one line */
1068 uncompressed_size = td->channel_line_size * (uint64_t)td->ysize;/* uncompress size of the block */
1070 if ((s->compression == EXR_RAW && (data_size != uncompressed_size ||
1071 line_offset > buf_size - uncompressed_size)) ||
1072 (s->compression != EXR_RAW && (data_size > uncompressed_size ||
1073 line_offset > buf_size - data_size))) {
1074 return AVERROR_INVALIDDATA;
1078 window_xmin = FFMIN(avctx->width, FFMAX(0, s->xmin + col));
1079 window_xmax = FFMIN(avctx->width, FFMAX(0, s->xmin + col + td->xsize));
1080 window_ymin = FFMIN(avctx->height, FFMAX(0, line ));
1081 window_ymax = FFMIN(avctx->height, FFMAX(0, line + td->ysize));
1082 xsize = window_xmax - window_xmin;
1083 ysize = window_ymax - window_ymin;
1085 /* tile or scanline not visible skip decoding */
1086 if (xsize <= 0 || ysize <= 0)
1089 /* is the first tile or is a scanline */
1092 /* pixels to add at the left of the display window */
1093 window_xoffset = FFMAX(0, s->xmin);
1094 /* bytes to add at the left of the display window */
1095 bxmin = window_xoffset * step;
1098 /* is the last tile or is a scanline */
1099 if(col + td->xsize == s->xdelta) {
1100 window_xmax = avctx->width;
1101 /* bytes to add at the right of the display window */
1102 axmax = FFMAX(0, (avctx->width - (s->xmax + 1))) * step;
1105 if (data_size < uncompressed_size || s->is_tile) { /* td->tmp is use for tile reorganization */
1106 av_fast_padded_malloc(&td->tmp, &td->tmp_size, uncompressed_size);
1108 return AVERROR(ENOMEM);
1111 if (data_size < uncompressed_size) {
1112 av_fast_padded_malloc(&td->uncompressed_data,
1113 &td->uncompressed_size, uncompressed_size + 64);/* Force 64 padding for AVX2 reorder_pixels dst */
1115 if (!td->uncompressed_data)
1116 return AVERROR(ENOMEM);
1118 ret = AVERROR_INVALIDDATA;
1119 switch (s->compression) {
1122 ret = zip_uncompress(s, src, data_size, uncompressed_size, td);
1125 ret = piz_uncompress(s, src, data_size, uncompressed_size, td);
1128 ret = pxr24_uncompress(s, src, data_size, uncompressed_size, td);
1131 ret = rle_uncompress(s, src, data_size, uncompressed_size, td);
1135 ret = b44_uncompress(s, src, data_size, uncompressed_size, td);
1139 av_log(avctx, AV_LOG_ERROR, "decode_block() failed.\n");
1142 src = td->uncompressed_data;
1145 /* offsets to crop data outside display window */
1146 data_xoffset = FFABS(FFMIN(0, s->xmin + col)) * (s->pixel_type == EXR_HALF ? 2 : 4);
1147 data_yoffset = FFABS(FFMIN(0, line));
1148 data_window_offset = (data_yoffset * td->channel_line_size) + data_xoffset;
1151 channel_buffer[0] = src + (td->xsize * s->channel_offsets[0]) + data_window_offset;
1152 channel_buffer[1] = src + (td->xsize * s->channel_offsets[1]) + data_window_offset;
1153 channel_buffer[2] = src + (td->xsize * s->channel_offsets[2]) + data_window_offset;
1154 rgb_channel_count = 3;
1155 } else { /* put y data in the first channel_buffer */
1156 channel_buffer[0] = src + (td->xsize * s->channel_offsets[1]) + data_window_offset;
1157 rgb_channel_count = 1;
1159 if (s->channel_offsets[3] >= 0)
1160 channel_buffer[3] = src + (td->xsize * s->channel_offsets[3]) + data_window_offset;
1162 if (s->desc->flags & AV_PIX_FMT_FLAG_FLOAT) {
1164 /* todo: change this when a floating point pixel format with luma with alpha is implemented */
1165 int channel_count = s->channel_offsets[3] >= 0 ? 4 : rgb_channel_count;
1167 channel_buffer[1] = channel_buffer[0];
1168 channel_buffer[2] = channel_buffer[0];
1171 for (c = 0; c < channel_count; c++) {
1172 int plane = s->desc->comp[c].plane;
1173 ptr = p->data[plane] + window_ymin * p->linesize[plane] + (window_xmin * 4);
1175 for (i = 0; i < ysize; i++, ptr += p->linesize[plane]) {
1177 union av_intfloat32 *ptr_x;
1179 src = channel_buffer[c];
1180 ptr_x = (union av_intfloat32 *)ptr;
1182 // Zero out the start if xmin is not 0
1183 memset(ptr_x, 0, bxmin);
1184 ptr_x += window_xoffset;
1186 if (s->pixel_type == EXR_FLOAT) {
1188 union av_intfloat32 t;
1189 if (trc_func && c < 3) {
1190 for (x = 0; x < xsize; x++) {
1191 t.i = bytestream_get_le32(&src);
1192 t.f = trc_func(t.f);
1196 for (x = 0; x < xsize; x++) {
1197 t.i = bytestream_get_le32(&src);
1198 if (t.f > 0.0f && c < 3) /* avoid negative values */
1199 t.f = powf(t.f, one_gamma);
1203 } else if (s->pixel_type == EXR_HALF) {
1205 if (c < 3 || !trc_func) {
1206 for (x = 0; x < xsize; x++) {
1207 *ptr_x++ = s->gamma_table[bytestream_get_le16(&src)];
1210 for (x = 0; x < xsize; x++) {
1211 *ptr_x++ = exr_half2float(bytestream_get_le16(&src));;
1216 // Zero out the end if xmax+1 is not w
1217 memset(ptr_x, 0, axmax);
1218 channel_buffer[c] += td->channel_line_size;
1223 av_assert1(s->pixel_type == EXR_UINT);
1224 ptr = p->data[0] + window_ymin * p->linesize[0] + (window_xmin * s->desc->nb_components * 2);
1226 for (i = 0; i < ysize; i++, ptr += p->linesize[0]) {
1229 const uint8_t *rgb[3];
1232 for (c = 0; c < rgb_channel_count; c++) {
1233 rgb[c] = channel_buffer[c];
1236 if (channel_buffer[3])
1237 a = channel_buffer[3];
1239 ptr_x = (uint16_t *) ptr;
1241 // Zero out the start if xmin is not 0
1242 memset(ptr_x, 0, bxmin);
1243 ptr_x += window_xoffset * s->desc->nb_components;
1245 for (x = 0; x < xsize; x++) {
1246 for (c = 0; c < rgb_channel_count; c++) {
1247 *ptr_x++ = bytestream_get_le32(&rgb[c]) >> 16;
1250 if (channel_buffer[3])
1251 *ptr_x++ = bytestream_get_le32(&a) >> 16;
1254 // Zero out the end if xmax+1 is not w
1255 memset(ptr_x, 0, axmax);
1257 channel_buffer[0] += td->channel_line_size;
1258 channel_buffer[1] += td->channel_line_size;
1259 channel_buffer[2] += td->channel_line_size;
1260 if (channel_buffer[3])
1261 channel_buffer[3] += td->channel_line_size;
1269 * Check if the variable name corresponds to its data type.
1271 * @param s the EXRContext
1272 * @param value_name name of the variable to check
1273 * @param value_type type of the variable to check
1274 * @param minimum_length minimum length of the variable data
1276 * @return bytes to read containing variable data
1277 * -1 if variable is not found
1278 * 0 if buffer ended prematurely
1280 static int check_header_variable(EXRContext *s,
1281 const char *value_name,
1282 const char *value_type,
1283 unsigned int minimum_length)
1287 if (bytestream2_get_bytes_left(&s->gb) >= minimum_length &&
1288 !strcmp(s->gb.buffer, value_name)) {
1289 // found value_name, jump to value_type (null terminated strings)
1290 s->gb.buffer += strlen(value_name) + 1;
1291 if (!strcmp(s->gb.buffer, value_type)) {
1292 s->gb.buffer += strlen(value_type) + 1;
1293 var_size = bytestream2_get_le32(&s->gb);
1294 // don't go read past boundaries
1295 if (var_size > bytestream2_get_bytes_left(&s->gb))
1298 // value_type not found, reset the buffer
1299 s->gb.buffer -= strlen(value_name) + 1;
1300 av_log(s->avctx, AV_LOG_WARNING,
1301 "Unknown data type %s for header variable %s.\n",
1302 value_type, value_name);
1309 static int decode_header(EXRContext *s, AVFrame *frame)
1311 AVDictionary *metadata = NULL;
1312 int magic_number, version, i, flags, sar = 0;
1313 int layer_match = 0;
1315 int dup_channels = 0;
1317 s->current_channel_offset = 0;
1324 s->channel_offsets[0] = -1;
1325 s->channel_offsets[1] = -1;
1326 s->channel_offsets[2] = -1;
1327 s->channel_offsets[3] = -1;
1328 s->pixel_type = EXR_UNKNOWN;
1329 s->compression = EXR_UNKN;
1333 s->tile_attr.xSize = -1;
1334 s->tile_attr.ySize = -1;
1338 if (bytestream2_get_bytes_left(&s->gb) < 10) {
1339 av_log(s->avctx, AV_LOG_ERROR, "Header too short to parse.\n");
1340 return AVERROR_INVALIDDATA;
1343 magic_number = bytestream2_get_le32(&s->gb);
1344 if (magic_number != 20000630) {
1345 /* As per documentation of OpenEXR, it is supposed to be
1346 * int 20000630 little-endian */
1347 av_log(s->avctx, AV_LOG_ERROR, "Wrong magic number %d.\n", magic_number);
1348 return AVERROR_INVALIDDATA;
1351 version = bytestream2_get_byte(&s->gb);
1353 avpriv_report_missing_feature(s->avctx, "Version %d", version);
1354 return AVERROR_PATCHWELCOME;
1357 flags = bytestream2_get_le24(&s->gb);
1362 avpriv_report_missing_feature(s->avctx, "deep data");
1363 return AVERROR_PATCHWELCOME;
1366 avpriv_report_missing_feature(s->avctx, "multipart");
1367 return AVERROR_PATCHWELCOME;
1371 while (bytestream2_get_bytes_left(&s->gb) > 0 && *s->gb.buffer) {
1373 if ((var_size = check_header_variable(s, "channels",
1374 "chlist", 38)) >= 0) {
1375 GetByteContext ch_gb;
1377 ret = AVERROR_INVALIDDATA;
1381 bytestream2_init(&ch_gb, s->gb.buffer, var_size);
1383 while (bytestream2_get_bytes_left(&ch_gb) >= 19) {
1384 EXRChannel *channel;
1385 enum ExrPixelType current_pixel_type;
1386 int channel_index = -1;
1389 if (strcmp(s->layer, "") != 0) {
1390 if (strncmp(ch_gb.buffer, s->layer, strlen(s->layer)) == 0) {
1392 av_log(s->avctx, AV_LOG_INFO,
1393 "Channel match layer : %s.\n", ch_gb.buffer);
1394 ch_gb.buffer += strlen(s->layer);
1395 if (*ch_gb.buffer == '.')
1396 ch_gb.buffer++; /* skip dot if not given */
1399 av_log(s->avctx, AV_LOG_INFO,
1400 "Channel doesn't match layer : %s.\n", ch_gb.buffer);
1406 if (layer_match) { /* only search channel if the layer match is valid */
1407 if (!av_strcasecmp(ch_gb.buffer, "R") ||
1408 !av_strcasecmp(ch_gb.buffer, "X") ||
1409 !av_strcasecmp(ch_gb.buffer, "U")) {
1412 } else if (!av_strcasecmp(ch_gb.buffer, "G") ||
1413 !av_strcasecmp(ch_gb.buffer, "V")) {
1416 } else if (!av_strcasecmp(ch_gb.buffer, "Y")) {
1419 } else if (!av_strcasecmp(ch_gb.buffer, "B") ||
1420 !av_strcasecmp(ch_gb.buffer, "Z") ||
1421 !av_strcasecmp(ch_gb.buffer, "W")) {
1424 } else if (!av_strcasecmp(ch_gb.buffer, "A")) {
1427 av_log(s->avctx, AV_LOG_WARNING,
1428 "Unsupported channel %.256s.\n", ch_gb.buffer);
1432 /* skip until you get a 0 */
1433 while (bytestream2_get_bytes_left(&ch_gb) > 0 &&
1434 bytestream2_get_byte(&ch_gb))
1437 if (bytestream2_get_bytes_left(&ch_gb) < 4) {
1438 av_log(s->avctx, AV_LOG_ERROR, "Incomplete header.\n");
1439 ret = AVERROR_INVALIDDATA;
1443 current_pixel_type = bytestream2_get_le32(&ch_gb);
1444 if (current_pixel_type >= EXR_UNKNOWN) {
1445 avpriv_report_missing_feature(s->avctx, "Pixel type %d",
1446 current_pixel_type);
1447 ret = AVERROR_PATCHWELCOME;
1451 bytestream2_skip(&ch_gb, 4);
1452 xsub = bytestream2_get_le32(&ch_gb);
1453 ysub = bytestream2_get_le32(&ch_gb);
1455 if (xsub != 1 || ysub != 1) {
1456 avpriv_report_missing_feature(s->avctx,
1457 "Subsampling %dx%d",
1459 ret = AVERROR_PATCHWELCOME;
1463 if (channel_index >= 0 && s->channel_offsets[channel_index] == -1) { /* channel has not been previously assigned */
1464 if (s->pixel_type != EXR_UNKNOWN &&
1465 s->pixel_type != current_pixel_type) {
1466 av_log(s->avctx, AV_LOG_ERROR,
1467 "RGB channels not of the same depth.\n");
1468 ret = AVERROR_INVALIDDATA;
1471 s->pixel_type = current_pixel_type;
1472 s->channel_offsets[channel_index] = s->current_channel_offset;
1473 } else if (channel_index >= 0) {
1474 av_log(s->avctx, AV_LOG_WARNING,
1475 "Multiple channels with index %d.\n", channel_index);
1476 if (++dup_channels > 10) {
1477 ret = AVERROR_INVALIDDATA;
1482 s->channels = av_realloc(s->channels,
1483 ++s->nb_channels * sizeof(EXRChannel));
1485 ret = AVERROR(ENOMEM);
1488 channel = &s->channels[s->nb_channels - 1];
1489 channel->pixel_type = current_pixel_type;
1490 channel->xsub = xsub;
1491 channel->ysub = ysub;
1493 if (current_pixel_type == EXR_HALF) {
1494 s->current_channel_offset += 2;
1495 } else {/* Float or UINT32 */
1496 s->current_channel_offset += 4;
1500 /* Check if all channels are set with an offset or if the channels
1501 * are causing an overflow */
1502 if (!s->is_luma) {/* if we expected to have at least 3 channels */
1503 if (FFMIN3(s->channel_offsets[0],
1504 s->channel_offsets[1],
1505 s->channel_offsets[2]) < 0) {
1506 if (s->channel_offsets[0] < 0)
1507 av_log(s->avctx, AV_LOG_ERROR, "Missing red channel.\n");
1508 if (s->channel_offsets[1] < 0)
1509 av_log(s->avctx, AV_LOG_ERROR, "Missing green channel.\n");
1510 if (s->channel_offsets[2] < 0)
1511 av_log(s->avctx, AV_LOG_ERROR, "Missing blue channel.\n");
1512 ret = AVERROR_INVALIDDATA;
1517 // skip one last byte and update main gb
1518 s->gb.buffer = ch_gb.buffer + 1;
1520 } else if ((var_size = check_header_variable(s, "dataWindow", "box2i",
1522 int xmin, ymin, xmax, ymax;
1524 ret = AVERROR_INVALIDDATA;
1528 xmin = bytestream2_get_le32(&s->gb);
1529 ymin = bytestream2_get_le32(&s->gb);
1530 xmax = bytestream2_get_le32(&s->gb);
1531 ymax = bytestream2_get_le32(&s->gb);
1533 if (xmin > xmax || ymin > ymax ||
1534 (unsigned)xmax - xmin >= INT_MAX ||
1535 (unsigned)ymax - ymin >= INT_MAX) {
1536 ret = AVERROR_INVALIDDATA;
1543 s->xdelta = (s->xmax - s->xmin) + 1;
1544 s->ydelta = (s->ymax - s->ymin) + 1;
1547 } else if ((var_size = check_header_variable(s, "displayWindow",
1548 "box2i", 34)) >= 0) {
1550 ret = AVERROR_INVALIDDATA;
1554 bytestream2_skip(&s->gb, 8);
1555 s->w = bytestream2_get_le32(&s->gb) + 1;
1556 s->h = bytestream2_get_le32(&s->gb) + 1;
1559 } else if ((var_size = check_header_variable(s, "lineOrder",
1560 "lineOrder", 25)) >= 0) {
1563 ret = AVERROR_INVALIDDATA;
1567 line_order = bytestream2_get_byte(&s->gb);
1568 av_log(s->avctx, AV_LOG_DEBUG, "line order: %d.\n", line_order);
1569 if (line_order > 2) {
1570 av_log(s->avctx, AV_LOG_ERROR, "Unknown line order.\n");
1571 ret = AVERROR_INVALIDDATA;
1576 } else if ((var_size = check_header_variable(s, "pixelAspectRatio",
1577 "float", 31)) >= 0) {
1579 ret = AVERROR_INVALIDDATA;
1583 sar = bytestream2_get_le32(&s->gb);
1586 } else if ((var_size = check_header_variable(s, "compression",
1587 "compression", 29)) >= 0) {
1589 ret = AVERROR_INVALIDDATA;
1593 if (s->compression == EXR_UNKN)
1594 s->compression = bytestream2_get_byte(&s->gb);
1596 av_log(s->avctx, AV_LOG_WARNING,
1597 "Found more than one compression attribute.\n");
1600 } else if ((var_size = check_header_variable(s, "tiles",
1601 "tiledesc", 22)) >= 0) {
1605 av_log(s->avctx, AV_LOG_WARNING,
1606 "Found tile attribute and scanline flags. Exr will be interpreted as scanline.\n");
1608 s->tile_attr.xSize = bytestream2_get_le32(&s->gb);
1609 s->tile_attr.ySize = bytestream2_get_le32(&s->gb);
1611 tileLevel = bytestream2_get_byte(&s->gb);
1612 s->tile_attr.level_mode = tileLevel & 0x0f;
1613 s->tile_attr.level_round = (tileLevel >> 4) & 0x0f;
1615 if (s->tile_attr.level_mode >= EXR_TILE_LEVEL_UNKNOWN) {
1616 avpriv_report_missing_feature(s->avctx, "Tile level mode %d",
1617 s->tile_attr.level_mode);
1618 ret = AVERROR_PATCHWELCOME;
1622 if (s->tile_attr.level_round >= EXR_TILE_ROUND_UNKNOWN) {
1623 avpriv_report_missing_feature(s->avctx, "Tile level round %d",
1624 s->tile_attr.level_round);
1625 ret = AVERROR_PATCHWELCOME;
1630 } else if ((var_size = check_header_variable(s, "writer",
1631 "string", 1)) >= 0) {
1632 uint8_t key[256] = { 0 };
1634 bytestream2_get_buffer(&s->gb, key, FFMIN(sizeof(key) - 1, var_size));
1635 av_dict_set(&metadata, "writer", key, 0);
1640 // Check if there are enough bytes for a header
1641 if (bytestream2_get_bytes_left(&s->gb) <= 9) {
1642 av_log(s->avctx, AV_LOG_ERROR, "Incomplete header\n");
1643 ret = AVERROR_INVALIDDATA;
1647 // Process unknown variables
1648 for (i = 0; i < 2; i++) // value_name and value_type
1649 while (bytestream2_get_byte(&s->gb) != 0);
1651 // Skip variable length
1652 bytestream2_skip(&s->gb, bytestream2_get_le32(&s->gb));
1655 ff_set_sar(s->avctx, av_d2q(av_int2float(sar), 255));
1657 if (s->compression == EXR_UNKN) {
1658 av_log(s->avctx, AV_LOG_ERROR, "Missing compression attribute.\n");
1659 ret = AVERROR_INVALIDDATA;
1664 if (s->tile_attr.xSize < 1 || s->tile_attr.ySize < 1) {
1665 av_log(s->avctx, AV_LOG_ERROR, "Invalid tile attribute.\n");
1666 ret = AVERROR_INVALIDDATA;
1671 if (bytestream2_get_bytes_left(&s->gb) <= 0) {
1672 av_log(s->avctx, AV_LOG_ERROR, "Incomplete frame.\n");
1673 ret = AVERROR_INVALIDDATA;
1677 frame->metadata = metadata;
1679 // aaand we are done
1680 bytestream2_skip(&s->gb, 1);
1683 av_dict_free(&metadata);
1687 static int decode_frame(AVCodecContext *avctx, void *data,
1688 int *got_frame, AVPacket *avpkt)
1690 EXRContext *s = avctx->priv_data;
1691 ThreadFrame frame = { .f = data };
1692 AVFrame *picture = data;
1695 int i, y, ret, ymax;
1698 int nb_blocks; /* nb scanline or nb tile */
1699 uint64_t start_offset_table;
1700 uint64_t start_next_scanline;
1701 PutByteContext offset_table_writer;
1703 bytestream2_init(&s->gb, avpkt->data, avpkt->size);
1705 if ((ret = decode_header(s, picture)) < 0)
1708 switch (s->pixel_type) {
1711 if (s->channel_offsets[3] >= 0) {
1713 avctx->pix_fmt = AV_PIX_FMT_GBRAPF32;
1715 /* todo: change this when a floating point pixel format with luma with alpha is implemented */
1716 avctx->pix_fmt = AV_PIX_FMT_GBRAPF32;
1720 avctx->pix_fmt = AV_PIX_FMT_GBRPF32;
1722 avctx->pix_fmt = AV_PIX_FMT_GRAYF32;
1727 if (s->channel_offsets[3] >= 0) {
1729 avctx->pix_fmt = AV_PIX_FMT_RGBA64;
1731 avctx->pix_fmt = AV_PIX_FMT_YA16;
1735 avctx->pix_fmt = AV_PIX_FMT_RGB48;
1737 avctx->pix_fmt = AV_PIX_FMT_GRAY16;
1742 av_log(avctx, AV_LOG_ERROR, "Missing channel list.\n");
1743 return AVERROR_INVALIDDATA;
1746 if (s->apply_trc_type != AVCOL_TRC_UNSPECIFIED)
1747 avctx->color_trc = s->apply_trc_type;
1749 switch (s->compression) {
1753 s->scan_lines_per_block = 1;
1757 s->scan_lines_per_block = 16;
1762 s->scan_lines_per_block = 32;
1765 avpriv_report_missing_feature(avctx, "Compression %d", s->compression);
1766 return AVERROR_PATCHWELCOME;
1769 /* Verify the xmin, xmax, ymin and ymax before setting the actual image size.
1770 * It's possible for the data window can larger or outside the display window */
1771 if (s->xmin > s->xmax || s->ymin > s->ymax ||
1772 s->ydelta == 0xFFFFFFFF || s->xdelta == 0xFFFFFFFF) {
1773 av_log(avctx, AV_LOG_ERROR, "Wrong or missing size information.\n");
1774 return AVERROR_INVALIDDATA;
1777 if ((ret = ff_set_dimensions(avctx, s->w, s->h)) < 0)
1780 s->desc = av_pix_fmt_desc_get(avctx->pix_fmt);
1782 return AVERROR_INVALIDDATA;
1784 if (s->desc->flags & AV_PIX_FMT_FLAG_FLOAT) {
1785 planes = s->desc->nb_components;
1786 out_line_size = avctx->width * 4;
1789 out_line_size = avctx->width * 2 * s->desc->nb_components;
1793 nb_blocks = ((s->xdelta + s->tile_attr.xSize - 1) / s->tile_attr.xSize) *
1794 ((s->ydelta + s->tile_attr.ySize - 1) / s->tile_attr.ySize);
1795 } else { /* scanline */
1796 nb_blocks = (s->ydelta + s->scan_lines_per_block - 1) /
1797 s->scan_lines_per_block;
1800 if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
1803 if (bytestream2_get_bytes_left(&s->gb)/8 < nb_blocks)
1804 return AVERROR_INVALIDDATA;
1806 // check offset table and recreate it if need
1807 if (!s->is_tile && bytestream2_peek_le64(&s->gb) == 0) {
1808 av_log(s->avctx, AV_LOG_DEBUG, "recreating invalid scanline offset table\n");
1810 start_offset_table = bytestream2_tell(&s->gb);
1811 start_next_scanline = start_offset_table + nb_blocks * 8;
1812 bytestream2_init_writer(&offset_table_writer, &avpkt->data[start_offset_table], nb_blocks * 8);
1814 for (y = 0; y < nb_blocks; y++) {
1815 /* write offset of prev scanline in offset table */
1816 bytestream2_put_le64(&offset_table_writer, start_next_scanline);
1818 /* get len of next scanline */
1819 bytestream2_seek(&s->gb, start_next_scanline + 4, SEEK_SET);/* skip line number */
1820 start_next_scanline += (bytestream2_get_le32(&s->gb) + 8);
1822 bytestream2_seek(&s->gb, start_offset_table, SEEK_SET);
1825 // save pointer we are going to use in decode_block
1826 s->buf = avpkt->data;
1827 s->buf_size = avpkt->size;
1829 // Zero out the start if ymin is not 0
1830 for (i = 0; i < planes; i++) {
1831 ptr = picture->data[i];
1832 for (y = 0; y < FFMIN(s->ymin, s->h); y++) {
1833 memset(ptr, 0, out_line_size);
1834 ptr += picture->linesize[i];
1838 s->picture = picture;
1840 avctx->execute2(avctx, decode_block, s->thread_data, NULL, nb_blocks);
1842 ymax = FFMAX(0, s->ymax + 1);
1843 // Zero out the end if ymax+1 is not h
1844 if (ymax < avctx->height)
1845 for (i = 0; i < planes; i++) {
1846 ptr = picture->data[i] + (ymax * picture->linesize[i]);
1847 for (y = ymax; y < avctx->height; y++) {
1848 memset(ptr, 0, out_line_size);
1849 ptr += picture->linesize[i];
1853 picture->pict_type = AV_PICTURE_TYPE_I;
1859 static av_cold int decode_init(AVCodecContext *avctx)
1861 EXRContext *s = avctx->priv_data;
1863 union av_intfloat32 t;
1864 float one_gamma = 1.0f / s->gamma;
1865 avpriv_trc_function trc_func = NULL;
1869 ff_exrdsp_init(&s->dsp);
1872 ff_bswapdsp_init(&s->bbdsp);
1875 trc_func = avpriv_get_trc_function_from_trc(s->apply_trc_type);
1877 for (i = 0; i < 65536; ++i) {
1878 t = exr_half2float(i);
1879 t.f = trc_func(t.f);
1880 s->gamma_table[i] = t;
1883 if (one_gamma > 0.9999f && one_gamma < 1.0001f) {
1884 for (i = 0; i < 65536; ++i) {
1885 s->gamma_table[i] = exr_half2float(i);
1888 for (i = 0; i < 65536; ++i) {
1889 t = exr_half2float(i);
1890 /* If negative value we reuse half value */
1892 s->gamma_table[i] = t;
1894 t.f = powf(t.f, one_gamma);
1895 s->gamma_table[i] = t;
1901 // allocate thread data, used for non EXR_RAW compression types
1902 s->thread_data = av_mallocz_array(avctx->thread_count, sizeof(EXRThreadData));
1903 if (!s->thread_data)
1904 return AVERROR_INVALIDDATA;
1909 static av_cold int decode_end(AVCodecContext *avctx)
1911 EXRContext *s = avctx->priv_data;
1913 for (i = 0; i < avctx->thread_count; i++) {
1914 EXRThreadData *td = &s->thread_data[i];
1915 av_freep(&td->uncompressed_data);
1917 av_freep(&td->bitmap);
1921 av_freep(&s->thread_data);
1922 av_freep(&s->channels);
1927 #define OFFSET(x) offsetof(EXRContext, x)
1928 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1929 static const AVOption options[] = {
1930 { "layer", "Set the decoding layer", OFFSET(layer),
1931 AV_OPT_TYPE_STRING, { .str = "" }, 0, 0, VD },
1932 { "gamma", "Set the float gamma value when decoding", OFFSET(gamma),
1933 AV_OPT_TYPE_FLOAT, { .dbl = 1.0f }, 0.001, FLT_MAX, VD },
1935 // XXX: Note the abuse of the enum using AVCOL_TRC_UNSPECIFIED to subsume the existing gamma option
1936 { "apply_trc", "color transfer characteristics to apply to EXR linear input", OFFSET(apply_trc_type),
1937 AV_OPT_TYPE_INT, {.i64 = AVCOL_TRC_UNSPECIFIED }, 1, AVCOL_TRC_NB-1, VD, "apply_trc_type"},
1938 { "bt709", "BT.709", 0,
1939 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_BT709 }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1940 { "gamma", "gamma", 0,
1941 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_UNSPECIFIED }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1942 { "gamma22", "BT.470 M", 0,
1943 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_GAMMA22 }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1944 { "gamma28", "BT.470 BG", 0,
1945 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_GAMMA28 }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1946 { "smpte170m", "SMPTE 170 M", 0,
1947 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_SMPTE170M }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1948 { "smpte240m", "SMPTE 240 M", 0,
1949 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_SMPTE240M }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1950 { "linear", "Linear", 0,
1951 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_LINEAR }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1953 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_LOG }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1954 { "log_sqrt", "Log square root", 0,
1955 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_LOG_SQRT }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1956 { "iec61966_2_4", "IEC 61966-2-4", 0,
1957 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_IEC61966_2_4 }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1958 { "bt1361", "BT.1361", 0,
1959 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_BT1361_ECG }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1960 { "iec61966_2_1", "IEC 61966-2-1", 0,
1961 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_IEC61966_2_1 }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1962 { "bt2020_10bit", "BT.2020 - 10 bit", 0,
1963 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_BT2020_10 }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1964 { "bt2020_12bit", "BT.2020 - 12 bit", 0,
1965 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_BT2020_12 }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1966 { "smpte2084", "SMPTE ST 2084", 0,
1967 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_SMPTEST2084 }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1968 { "smpte428_1", "SMPTE ST 428-1", 0,
1969 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_SMPTEST428_1 }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
1974 static const AVClass exr_class = {
1975 .class_name = "EXR",
1976 .item_name = av_default_item_name,
1978 .version = LIBAVUTIL_VERSION_INT,
1981 AVCodec ff_exr_decoder = {
1983 .long_name = NULL_IF_CONFIG_SMALL("OpenEXR image"),
1984 .type = AVMEDIA_TYPE_VIDEO,
1985 .id = AV_CODEC_ID_EXR,
1986 .priv_data_size = sizeof(EXRContext),
1987 .init = decode_init,
1988 .close = decode_end,
1989 .decode = decode_frame,
1990 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS |
1991 AV_CODEC_CAP_SLICE_THREADS,
1992 .priv_class = &exr_class,