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FFmpeg/libavcodec/exr.c
Andreas Rheinhardt 4243da4ff4 avcodec/codec_internal: Use union for FFCodec decode/encode callbacks 
This is possible, because every given FFCodec has to implement
exactly one of these. Doing so decreases sizeof(FFCodec) and
therefore decreases the size of the binary.
Notice that in case of position-independent code the decrease
is in .data.rel.ro, so that this translates to decreased
memory consumption.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-04-05 20:02:37 +02:00

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/*
* OpenEXR (.exr) image decoder
* Copyright (c) 2006 Industrial Light & Magic, a division of Lucas Digital Ltd. LLC
* Copyright (c) 2009 Jimmy Christensen
*
* B44/B44A, Tile, UINT32 added by Jokyo Images support by CNC - French National Center for Cinema
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* OpenEXR decoder
* @author Jimmy Christensen
*
* For more information on the OpenEXR format, visit:
* http://openexr.com/
*/
#include <float.h>
#include <zlib.h>
#include "libavutil/avassert.h"
#include "libavutil/common.h"
#include "libavutil/imgutils.h"
#include "libavutil/intfloat.h"
#include "libavutil/avstring.h"
#include "libavutil/opt.h"
#include "libavutil/color_utils.h"
#include "avcodec.h"
#include "bytestream.h"
#if HAVE_BIGENDIAN
#include "bswapdsp.h"
#endif
#include "codec_internal.h"
#include "exrdsp.h"
#include "get_bits.h"
#include "internal.h"
#include "half2float.h"
#include "mathops.h"
#include "thread.h"
enum ExrCompr {
EXR_RAW,
EXR_RLE,
EXR_ZIP1,
EXR_ZIP16,
EXR_PIZ,
EXR_PXR24,
EXR_B44,
EXR_B44A,
EXR_DWAA,
EXR_DWAB,
EXR_UNKN,
};
enum ExrPixelType {
EXR_UINT,
EXR_HALF,
EXR_FLOAT,
EXR_UNKNOWN,
};
enum ExrTileLevelMode {
EXR_TILE_LEVEL_ONE,
EXR_TILE_LEVEL_MIPMAP,
EXR_TILE_LEVEL_RIPMAP,
EXR_TILE_LEVEL_UNKNOWN,
};
enum ExrTileLevelRound {
EXR_TILE_ROUND_UP,
EXR_TILE_ROUND_DOWN,
EXR_TILE_ROUND_UNKNOWN,
};
typedef struct HuffEntry {
uint8_t len;
uint16_t sym;
uint32_t code;
} HuffEntry;
typedef struct EXRChannel {
int xsub, ysub;
enum ExrPixelType pixel_type;
} EXRChannel;
typedef struct EXRTileAttribute {
int32_t xSize;
int32_t ySize;
enum ExrTileLevelMode level_mode;
enum ExrTileLevelRound level_round;
} EXRTileAttribute;
typedef struct EXRThreadData {
uint8_t *uncompressed_data;
int uncompressed_size;
uint8_t *tmp;
int tmp_size;
uint8_t *bitmap;
uint16_t *lut;
uint8_t *ac_data;
unsigned ac_size;
uint8_t *dc_data;
unsigned dc_size;
uint8_t *rle_data;
unsigned rle_size;
uint8_t *rle_raw_data;
unsigned rle_raw_size;
float block[3][64];
int ysize, xsize;
int channel_line_size;
int run_sym;
HuffEntry *he;
uint64_t *freq;
VLC vlc;
} EXRThreadData;
typedef struct EXRContext {
AVClass *class;
AVFrame *picture;
AVCodecContext *avctx;
ExrDSPContext dsp;
#if HAVE_BIGENDIAN
BswapDSPContext bbdsp;
#endif
enum ExrCompr compression;
enum ExrPixelType pixel_type;
int channel_offsets[4]; // 0 = red, 1 = green, 2 = blue and 3 = alpha
const AVPixFmtDescriptor *desc;
int w, h;
uint32_t sar;
int32_t xmax, xmin;
int32_t ymax, ymin;
uint32_t xdelta, ydelta;
int scan_lines_per_block;
EXRTileAttribute tile_attr; /* header data attribute of tile */
int is_tile; /* 0 if scanline, 1 if tile */
int is_multipart;
int current_part;
int is_luma;/* 1 if there is an Y plane */
GetByteContext gb;
const uint8_t *buf;
int buf_size;
EXRChannel *channels;
int nb_channels;
int current_channel_offset;
uint32_t chunk_count;
EXRThreadData *thread_data;
const char *layer;
int selected_part;
enum AVColorTransferCharacteristic apply_trc_type;
float gamma;
union av_intfloat32 gamma_table[65536];
uint32_t mantissatable[2048];
uint32_t exponenttable[64];
uint16_t offsettable[64];
} EXRContext;
static int zip_uncompress(EXRContext *s, const uint8_t *src, int compressed_size,
int uncompressed_size, EXRThreadData *td)
{
unsigned long dest_len = uncompressed_size;
if (uncompress(td->tmp, &dest_len, src, compressed_size) != Z_OK ||
dest_len != uncompressed_size)
return AVERROR_INVALIDDATA;
av_assert1(uncompressed_size % 2 == 0);
s->dsp.predictor(td->tmp, uncompressed_size);
s->dsp.reorder_pixels(td->uncompressed_data, td->tmp, uncompressed_size);
return 0;
}
static int rle(uint8_t *dst, const uint8_t *src,
int compressed_size, int uncompressed_size)
{
uint8_t *d = dst;
const int8_t *s = src;
int ssize = compressed_size;
int dsize = uncompressed_size;
uint8_t *dend = d + dsize;
int count;
while (ssize > 0) {
count = *s++;
if (count < 0) {
count = -count;
if ((dsize -= count) < 0 ||
(ssize -= count + 1) < 0)
return AVERROR_INVALIDDATA;
while (count--)
*d++ = *s++;
} else {
count++;
if ((dsize -= count) < 0 ||
(ssize -= 2) < 0)
return AVERROR_INVALIDDATA;
while (count--)
*d++ = *s;
s++;
}
}
if (dend != d)
return AVERROR_INVALIDDATA;
return 0;
}
static int rle_uncompress(EXRContext *ctx, const uint8_t *src, int compressed_size,
int uncompressed_size, EXRThreadData *td)
{
rle(td->tmp, src, compressed_size, uncompressed_size);
av_assert1(uncompressed_size % 2 == 0);
ctx->dsp.predictor(td->tmp, uncompressed_size);
ctx->dsp.reorder_pixels(td->uncompressed_data, td->tmp, uncompressed_size);
return 0;
}
#define USHORT_RANGE (1 << 16)
#define BITMAP_SIZE (1 << 13)
static uint16_t reverse_lut(const uint8_t *bitmap, uint16_t *lut)
{
int i, k = 0;
for (i = 0; i < USHORT_RANGE; i++)
if ((i == 0) || (bitmap[i >> 3] & (1 << (i & 7))))
lut[k++] = i;
i = k - 1;
memset(lut + k, 0, (USHORT_RANGE - k) * 2);
return i;
}
static void apply_lut(const uint16_t *lut, uint16_t *dst, int dsize)
{
int i;
for (i = 0; i < dsize; ++i)
dst[i] = lut[dst[i]];
}
#define HUF_ENCBITS 16 // literal (value) bit length
#define HUF_ENCSIZE ((1 << HUF_ENCBITS) + 1) // encoding table size
static void huf_canonical_code_table(uint64_t *freq)
{
uint64_t c, n[59] = { 0 };
int i;
for (i = 0; i < HUF_ENCSIZE; i++)
n[freq[i]] += 1;
c = 0;
for (i = 58; i > 0; --i) {
uint64_t nc = ((c + n[i]) >> 1);
n[i] = c;
c = nc;
}
for (i = 0; i < HUF_ENCSIZE; ++i) {
int l = freq[i];
if (l > 0)
freq[i] = l | (n[l]++ << 6);
}
}
#define SHORT_ZEROCODE_RUN 59
#define LONG_ZEROCODE_RUN 63
#define SHORTEST_LONG_RUN (2 + LONG_ZEROCODE_RUN - SHORT_ZEROCODE_RUN)
#define LONGEST_LONG_RUN (255 + SHORTEST_LONG_RUN)
static int huf_unpack_enc_table(GetByteContext *gb,
int32_t im, int32_t iM, uint64_t *freq)
{
GetBitContext gbit;
int ret = init_get_bits8(&gbit, gb->buffer, bytestream2_get_bytes_left(gb));
if (ret < 0)
return ret;
for (; im <= iM; im++) {
uint64_t l = freq[im] = get_bits(&gbit, 6);
if (l == LONG_ZEROCODE_RUN) {
int zerun = get_bits(&gbit, 8) + SHORTEST_LONG_RUN;
if (im + zerun > iM + 1)
return AVERROR_INVALIDDATA;
while (zerun--)
freq[im++] = 0;
im--;
} else if (l >= SHORT_ZEROCODE_RUN) {
int zerun = l - SHORT_ZEROCODE_RUN + 2;
if (im + zerun > iM + 1)
return AVERROR_INVALIDDATA;
while (zerun--)
freq[im++] = 0;
im--;
}
}
bytestream2_skip(gb, (get_bits_count(&gbit) + 7) / 8);
huf_canonical_code_table(freq);
return 0;
}
static int huf_build_dec_table(EXRContext *s,
EXRThreadData *td, int im, int iM)
{
int j = 0;
td->run_sym = -1;
for (int i = im; i < iM; i++) {
td->he[j].sym = i;
td->he[j].len = td->freq[i] & 63;
td->he[j].code = td->freq[i] >> 6;
if (td->he[j].len > 32) {
avpriv_request_sample(s->avctx, "Too big code length");
return AVERROR_PATCHWELCOME;
}
if (td->he[j].len > 0)
j++;
else
td->run_sym = i;
}
if (im > 0)
td->run_sym = 0;
else if (iM < 65535)
td->run_sym = 65535;
if (td->run_sym == -1) {
avpriv_request_sample(s->avctx, "No place for run symbol");
return AVERROR_PATCHWELCOME;
}
td->he[j].sym = td->run_sym;
td->he[j].len = td->freq[iM] & 63;
if (td->he[j].len > 32) {
avpriv_request_sample(s->avctx, "Too big code length");
return AVERROR_PATCHWELCOME;
}
td->he[j].code = td->freq[iM] >> 6;
j++;
ff_free_vlc(&td->vlc);
return ff_init_vlc_sparse(&td->vlc, 12, j,
&td->he[0].len, sizeof(td->he[0]), sizeof(td->he[0].len),
&td->he[0].code, sizeof(td->he[0]), sizeof(td->he[0].code),
&td->he[0].sym, sizeof(td->he[0]), sizeof(td->he[0].sym), 0);
}
static int huf_decode(VLC *vlc, GetByteContext *gb, int nbits, int run_sym,
int no, uint16_t *out)
{
GetBitContext gbit;
int oe = 0;
init_get_bits(&gbit, gb->buffer, nbits);
while (get_bits_left(&gbit) > 0 && oe < no) {
uint16_t x = get_vlc2(&gbit, vlc->table, 12, 3);
if (x == run_sym) {
int run = get_bits(&gbit, 8);
uint16_t fill;
if (oe == 0 || oe + run > no)
return AVERROR_INVALIDDATA;
fill = out[oe - 1];
while (run-- > 0)
out[oe++] = fill;
} else {
out[oe++] = x;
}
}
return 0;
}
static int huf_uncompress(EXRContext *s,
EXRThreadData *td,
GetByteContext *gb,
uint16_t *dst, int dst_size)
{
int32_t im, iM;
uint32_t nBits;
int ret;
im = bytestream2_get_le32(gb);
iM = bytestream2_get_le32(gb);
bytestream2_skip(gb, 4);
nBits = bytestream2_get_le32(gb);
if (im < 0 || im >= HUF_ENCSIZE ||
iM < 0 || iM >= HUF_ENCSIZE)
return AVERROR_INVALIDDATA;
bytestream2_skip(gb, 4);
if (!td->freq)
td->freq = av_malloc_array(HUF_ENCSIZE, sizeof(*td->freq));
if (!td->he)
td->he = av_calloc(HUF_ENCSIZE, sizeof(*td->he));
if (!td->freq || !td->he) {
ret = AVERROR(ENOMEM);
return ret;
}
memset(td->freq, 0, sizeof(*td->freq) * HUF_ENCSIZE);
if ((ret = huf_unpack_enc_table(gb, im, iM, td->freq)) < 0)
return ret;
if (nBits > 8 * bytestream2_get_bytes_left(gb)) {
ret = AVERROR_INVALIDDATA;
return ret;
}
if ((ret = huf_build_dec_table(s, td, im, iM)) < 0)
return ret;
return huf_decode(&td->vlc, gb, nBits, td->run_sym, dst_size, dst);
}
static inline void wdec14(uint16_t l, uint16_t h, uint16_t *a, uint16_t *b)
{
int16_t ls = l;
int16_t hs = h;
int hi = hs;
int ai = ls + (hi & 1) + (hi >> 1);
int16_t as = ai;
int16_t bs = ai - hi;
*a = as;
*b = bs;
}
#define NBITS 16
#define A_OFFSET (1 << (NBITS - 1))
#define MOD_MASK ((1 << NBITS) - 1)
static inline void wdec16(uint16_t l, uint16_t h, uint16_t *a, uint16_t *b)
{
int m = l;
int d = h;
int bb = (m - (d >> 1)) & MOD_MASK;
int aa = (d + bb - A_OFFSET) & MOD_MASK;
*b = bb;
*a = aa;
}
static void wav_decode(uint16_t *in, int nx, int ox,
int ny, int oy, uint16_t mx)
{
int w14 = (mx < (1 << 14));
int n = (nx > ny) ? ny : nx;
int p = 1;
int p2;
while (p <= n)
p <<= 1;
p >>= 1;
p2 = p;
p >>= 1;
while (p >= 1) {
uint16_t *py = in;
uint16_t *ey = in + oy * (ny - p2);
uint16_t i00, i01, i10, i11;
int oy1 = oy * p;
int oy2 = oy * p2;
int ox1 = ox * p;
int ox2 = ox * p2;
for (; py <= ey; py += oy2) {
uint16_t *px = py;
uint16_t *ex = py + ox * (nx - p2);
for (; px <= ex; px += ox2) {
uint16_t *p01 = px + ox1;
uint16_t *p10 = px + oy1;
uint16_t *p11 = p10 + ox1;
if (w14) {
wdec14(*px, *p10, &i00, &i10);
wdec14(*p01, *p11, &i01, &i11);
wdec14(i00, i01, px, p01);
wdec14(i10, i11, p10, p11);
} else {
wdec16(*px, *p10, &i00, &i10);
wdec16(*p01, *p11, &i01, &i11);
wdec16(i00, i01, px, p01);
wdec16(i10, i11, p10, p11);
}
}
if (nx & p) {
uint16_t *p10 = px + oy1;
if (w14)
wdec14(*px, *p10, &i00, p10);
else
wdec16(*px, *p10, &i00, p10);
*px = i00;
}
}
if (ny & p) {
uint16_t *px = py;
uint16_t *ex = py + ox * (nx - p2);
for (; px <= ex; px += ox2) {
uint16_t *p01 = px + ox1;
if (w14)
wdec14(*px, *p01, &i00, p01);
else
wdec16(*px, *p01, &i00, p01);
*px = i00;
}
}
p2 = p;
p >>= 1;
}
}
static int piz_uncompress(EXRContext *s, const uint8_t *src, int ssize,
int dsize, EXRThreadData *td)
{
GetByteContext gb;
uint16_t maxval, min_non_zero, max_non_zero;
uint16_t *ptr;
uint16_t *tmp = (uint16_t *)td->tmp;
uint16_t *out;
uint16_t *in;
int ret, i, j;
int pixel_half_size;/* 1 for half, 2 for float and uint32 */
EXRChannel *channel;
int tmp_offset;
if (!td->bitmap)
td->bitmap = av_malloc(BITMAP_SIZE);
if (!td->lut)
td->lut = av_malloc(1 << 17);
if (!td->bitmap || !td->lut) {
av_freep(&td->bitmap);
av_freep(&td->lut);
return AVERROR(ENOMEM);
}
bytestream2_init(&gb, src, ssize);
min_non_zero = bytestream2_get_le16(&gb);
max_non_zero = bytestream2_get_le16(&gb);
if (max_non_zero >= BITMAP_SIZE)
return AVERROR_INVALIDDATA;
memset(td->bitmap, 0, FFMIN(min_non_zero, BITMAP_SIZE));
if (min_non_zero <= max_non_zero)
bytestream2_get_buffer(&gb, td->bitmap + min_non_zero,
max_non_zero - min_non_zero + 1);
memset(td->bitmap + max_non_zero + 1, 0, BITMAP_SIZE - max_non_zero - 1);
maxval = reverse_lut(td->bitmap, td->lut);
bytestream2_skip(&gb, 4);
ret = huf_uncompress(s, td, &gb, tmp, dsize / sizeof(uint16_t));
if (ret)
return ret;
ptr = tmp;
for (i = 0; i < s->nb_channels; i++) {
channel = &s->channels[i];
if (channel->pixel_type == EXR_HALF)
pixel_half_size = 1;
else
pixel_half_size = 2;
for (j = 0; j < pixel_half_size; j++)
wav_decode(ptr + j, td->xsize, pixel_half_size, td->ysize,
td->xsize * pixel_half_size, maxval);
ptr += td->xsize * td->ysize * pixel_half_size;
}
apply_lut(td->lut, tmp, dsize / sizeof(uint16_t));
out = (uint16_t *)td->uncompressed_data;
for (i = 0; i < td->ysize; i++) {
tmp_offset = 0;
for (j = 0; j < s->nb_channels; j++) {
channel = &s->channels[j];
if (channel->pixel_type == EXR_HALF)
pixel_half_size = 1;
else
pixel_half_size = 2;
in = tmp + tmp_offset * td->xsize * td->ysize + i * td->xsize * pixel_half_size;
tmp_offset += pixel_half_size;
#if HAVE_BIGENDIAN
s->bbdsp.bswap16_buf(out, in, td->xsize * pixel_half_size);
#else
memcpy(out, in, td->xsize * 2 * pixel_half_size);
#endif
out += td->xsize * pixel_half_size;
}
}
return 0;
}
static int pxr24_uncompress(EXRContext *s, const uint8_t *src,
int compressed_size, int uncompressed_size,
EXRThreadData *td)
{
unsigned long dest_len, expected_len = 0;
const uint8_t *in = td->tmp;
uint8_t *out;
int c, i, j;
for (i = 0; i < s->nb_channels; i++) {
if (s->channels[i].pixel_type == EXR_FLOAT) {
expected_len += (td->xsize * td->ysize * 3);/* PRX 24 store float in 24 bit instead of 32 */
} else if (s->channels[i].pixel_type == EXR_HALF) {
expected_len += (td->xsize * td->ysize * 2);
} else {//UINT 32
expected_len += (td->xsize * td->ysize * 4);
}
}
dest_len = expected_len;
if (uncompress(td->tmp, &dest_len, src, compressed_size) != Z_OK) {
return AVERROR_INVALIDDATA;
} else if (dest_len != expected_len) {
return AVERROR_INVALIDDATA;
}
out = td->uncompressed_data;
for (i = 0; i < td->ysize; i++)
for (c = 0; c < s->nb_channels; c++) {
EXRChannel *channel = &s->channels[c];
const uint8_t *ptr[4];
uint32_t pixel = 0;
switch (channel->pixel_type) {
case EXR_FLOAT:
ptr[0] = in;
ptr[1] = ptr[0] + td->xsize;
ptr[2] = ptr[1] + td->xsize;
in = ptr[2] + td->xsize;
for (j = 0; j < td->xsize; ++j) {
uint32_t diff = ((unsigned)*(ptr[0]++) << 24) |
(*(ptr[1]++) << 16) |
(*(ptr[2]++) << 8);
pixel += diff;
bytestream_put_le32(&out, pixel);
}
break;
case EXR_HALF:
ptr[0] = in;
ptr[1] = ptr[0] + td->xsize;
in = ptr[1] + td->xsize;
for (j = 0; j < td->xsize; j++) {
uint32_t diff = (*(ptr[0]++) << 8) | *(ptr[1]++);
pixel += diff;
bytestream_put_le16(&out, pixel);
}
break;
case EXR_UINT:
ptr[0] = in;
ptr[1] = ptr[0] + s->xdelta;
ptr[2] = ptr[1] + s->xdelta;
ptr[3] = ptr[2] + s->xdelta;
in = ptr[3] + s->xdelta;
for (j = 0; j < s->xdelta; ++j) {
uint32_t diff = ((uint32_t)*(ptr[0]++) << 24) |
(*(ptr[1]++) << 16) |
(*(ptr[2]++) << 8 ) |
(*(ptr[3]++));
pixel += diff;
bytestream_put_le32(&out, pixel);
}
break;
default:
return AVERROR_INVALIDDATA;
}
}
return 0;
}
static void unpack_14(const uint8_t b[14], uint16_t s[16])
{
unsigned short shift = (b[ 2] >> 2) & 15;
unsigned short bias = (0x20 << shift);
int i;
s[ 0] = (b[0] << 8) | b[1];
s[ 4] = s[ 0] + ((((b[ 2] << 4) | (b[ 3] >> 4)) & 0x3f) << shift) - bias;
s[ 8] = s[ 4] + ((((b[ 3] << 2) | (b[ 4] >> 6)) & 0x3f) << shift) - bias;
s[12] = s[ 8] + ((b[ 4] & 0x3f) << shift) - bias;
s[ 1] = s[ 0] + ((b[ 5] >> 2) << shift) - bias;
s[ 5] = s[ 4] + ((((b[ 5] << 4) | (b[ 6] >> 4)) & 0x3f) << shift) - bias;
s[ 9] = s[ 8] + ((((b[ 6] << 2) | (b[ 7] >> 6)) & 0x3f) << shift) - bias;
s[13] = s[12] + ((b[ 7] & 0x3f) << shift) - bias;
s[ 2] = s[ 1] + ((b[ 8] >> 2) << shift) - bias;
s[ 6] = s[ 5] + ((((b[ 8] << 4) | (b[ 9] >> 4)) & 0x3f) << shift) - bias;
s[10] = s[ 9] + ((((b[ 9] << 2) | (b[10] >> 6)) & 0x3f) << shift) - bias;
s[14] = s[13] + ((b[10] & 0x3f) << shift) - bias;
s[ 3] = s[ 2] + ((b[11] >> 2) << shift) - bias;
s[ 7] = s[ 6] + ((((b[11] << 4) | (b[12] >> 4)) & 0x3f) << shift) - bias;
s[11] = s[10] + ((((b[12] << 2) | (b[13] >> 6)) & 0x3f) << shift) - bias;
s[15] = s[14] + ((b[13] & 0x3f) << shift) - bias;
for (i = 0; i < 16; ++i) {
if (s[i] & 0x8000)
s[i] &= 0x7fff;
else
s[i] = ~s[i];
}
}
static void unpack_3(const uint8_t b[3], uint16_t s[16])
{
int i;
s[0] = (b[0] << 8) | b[1];
if (s[0] & 0x8000)
s[0] &= 0x7fff;
else
s[0] = ~s[0];
for (i = 1; i < 16; i++)
s[i] = s[0];
}
static int b44_uncompress(EXRContext *s, const uint8_t *src, int compressed_size,
int uncompressed_size, EXRThreadData *td) {
const int8_t *sr = src;
int stay_to_uncompress = compressed_size;
int nb_b44_block_w, nb_b44_block_h;
int index_tl_x, index_tl_y, index_out, index_tmp;
uint16_t tmp_buffer[16]; /* B44 use 4x4 half float pixel */
int c, iY, iX, y, x;
int target_channel_offset = 0;
/* calc B44 block count */
nb_b44_block_w = td->xsize / 4;
if ((td->xsize % 4) != 0)
nb_b44_block_w++;
nb_b44_block_h = td->ysize / 4;
if ((td->ysize % 4) != 0)
nb_b44_block_h++;
for (c = 0; c < s->nb_channels; c++) {
if (s->channels[c].pixel_type == EXR_HALF) {/* B44 only compress half float data */
for (iY = 0; iY < nb_b44_block_h; iY++) {
for (iX = 0; iX < nb_b44_block_w; iX++) {/* For each B44 block */
if (stay_to_uncompress < 3) {
av_log(s, AV_LOG_ERROR, "Not enough data for B44A block: %d", stay_to_uncompress);
return AVERROR_INVALIDDATA;
}
if (src[compressed_size - stay_to_uncompress + 2] == 0xfc) { /* B44A block */
unpack_3(sr, tmp_buffer);
sr += 3;
stay_to_uncompress -= 3;
} else {/* B44 Block */
if (stay_to_uncompress < 14) {
av_log(s, AV_LOG_ERROR, "Not enough data for B44 block: %d", stay_to_uncompress);
return AVERROR_INVALIDDATA;
}
unpack_14(sr, tmp_buffer);
sr += 14;
stay_to_uncompress -= 14;
}
/* copy data to uncompress buffer (B44 block can exceed target resolution)*/
index_tl_x = iX * 4;
index_tl_y = iY * 4;
for (y = index_tl_y; y < FFMIN(index_tl_y + 4, td->ysize); y++) {
for (x = index_tl_x; x < FFMIN(index_tl_x + 4, td->xsize); x++) {
index_out = target_channel_offset * td->xsize + y * td->channel_line_size + 2 * x;
index_tmp = (y-index_tl_y) * 4 + (x-index_tl_x);
td->uncompressed_data[index_out] = tmp_buffer[index_tmp] & 0xff;
td->uncompressed_data[index_out + 1] = tmp_buffer[index_tmp] >> 8;
}
}
}
}
target_channel_offset += 2;
} else {/* Float or UINT 32 channel */
if (stay_to_uncompress < td->ysize * td->xsize * 4) {
av_log(s, AV_LOG_ERROR, "Not enough data for uncompress channel: %d", stay_to_uncompress);
return AVERROR_INVALIDDATA;
}
for (y = 0; y < td->ysize; y++) {
index_out = target_channel_offset * td->xsize + y * td->channel_line_size;
memcpy(&td->uncompressed_data[index_out], sr, td->xsize * 4);
sr += td->xsize * 4;
}
target_channel_offset += 4;
stay_to_uncompress -= td->ysize * td->xsize * 4;
}
}
return 0;
}
static int ac_uncompress(EXRContext *s, GetByteContext *gb, float *block)
{
int ret = 0, n = 1;
while (n < 64) {
uint16_t val = bytestream2_get_ne16(gb);
if (val == 0xff00) {
n = 64;
} else if ((val >> 8) == 0xff) {
n += val & 0xff;
} else {
ret = n;
block[ff_zigzag_direct[n]] = av_int2float(half2float(val,
s->mantissatable,
s->exponenttable,
s->offsettable));
n++;
}
}
return ret;
}
static void idct_1d(float *blk, int step)
{
const float a = .5f * cosf( M_PI / 4.f);
const float b = .5f * cosf( M_PI / 16.f);
const float c = .5f * cosf( M_PI / 8.f);
const float d = .5f * cosf(3.f*M_PI / 16.f);
const float e = .5f * cosf(5.f*M_PI / 16.f);
const float f = .5f * cosf(3.f*M_PI / 8.f);
const float g = .5f * cosf(7.f*M_PI / 16.f);
float alpha[4], beta[4], theta[4], gamma[4];
alpha[0] = c * blk[2 * step];
alpha[1] = f * blk[2 * step];
alpha[2] = c * blk[6 * step];
alpha[3] = f * blk[6 * step];
beta[0] = b * blk[1 * step] + d * blk[3 * step] + e * blk[5 * step] + g * blk[7 * step];
beta[1] = d * blk[1 * step] - g * blk[3 * step] - b * blk[5 * step] - e * blk[7 * step];
beta[2] = e * blk[1 * step] - b * blk[3 * step] + g * blk[5 * step] + d * blk[7 * step];
beta[3] = g * blk[1 * step] - e * blk[3 * step] + d * blk[5 * step] - b * blk[7 * step];
theta[0] = a * (blk[0 * step] + blk[4 * step]);
theta[3] = a * (blk[0 * step] - blk[4 * step]);
theta[1] = alpha[0] + alpha[3];
theta[2] = alpha[1] - alpha[2];
gamma[0] = theta[0] + theta[1];
gamma[1] = theta[3] + theta[2];
gamma[2] = theta[3] - theta[2];
gamma[3] = theta[0] - theta[1];
blk[0 * step] = gamma[0] + beta[0];
blk[1 * step] = gamma[1] + beta[1];
blk[2 * step] = gamma[2] + beta[2];
blk[3 * step] = gamma[3] + beta[3];
blk[4 * step] = gamma[3] - beta[3];
blk[5 * step] = gamma[2] - beta[2];
blk[6 * step] = gamma[1] - beta[1];
blk[7 * step] = gamma[0] - beta[0];
}
static void dct_inverse(float *block)
{
for (int i = 0; i < 8; i++)
idct_1d(block + i, 8);
for (int i = 0; i < 8; i++) {
idct_1d(block, 1);
block += 8;
}
}
static void convert(float y, float u, float v,
float *b, float *g, float *r)
{
*r = y + 1.5747f * v;
*g = y - 0.1873f * u - 0.4682f * v;
*b = y + 1.8556f * u;
}
static float to_linear(float x, float scale)
{
float ax = fabsf(x);
if (ax <= 1.f) {
return FFSIGN(x) * powf(ax, 2.2f * scale);
} else {
const float log_base = expf(2.2f * scale);
return FFSIGN(x) * powf(log_base, ax - 1.f);
}
}
static int dwa_uncompress(EXRContext *s, const uint8_t *src, int compressed_size,
int uncompressed_size, EXRThreadData *td)
{
int64_t version, lo_usize, lo_size;
int64_t ac_size, dc_size, rle_usize, rle_csize, rle_raw_size;
int64_t ac_count, dc_count, ac_compression;
const int dc_w = td->xsize >> 3;
const int dc_h = td->ysize >> 3;
GetByteContext gb, agb;
int skip, ret;
if (compressed_size <= 88)
return AVERROR_INVALIDDATA;
version = AV_RL64(src + 0);
if (version != 2)
return AVERROR_INVALIDDATA;
lo_usize = AV_RL64(src + 8);
lo_size = AV_RL64(src + 16);
ac_size = AV_RL64(src + 24);
dc_size = AV_RL64(src + 32);
rle_csize = AV_RL64(src + 40);
rle_usize = AV_RL64(src + 48);
rle_raw_size = AV_RL64(src + 56);
ac_count = AV_RL64(src + 64);
dc_count = AV_RL64(src + 72);
ac_compression = AV_RL64(src + 80);
if ( compressed_size < (uint64_t)(lo_size | ac_size | dc_size | rle_csize) || compressed_size < 88LL + lo_size + ac_size + dc_size + rle_csize
|| ac_count > (uint64_t)INT_MAX/2
)
return AVERROR_INVALIDDATA;
bytestream2_init(&gb, src + 88, compressed_size - 88);
skip = bytestream2_get_le16(&gb);
if (skip < 2)
return AVERROR_INVALIDDATA;
bytestream2_skip(&gb, skip - 2);
if (lo_size > 0) {
if (lo_usize > uncompressed_size)
return AVERROR_INVALIDDATA;
bytestream2_skip(&gb, lo_size);
}
if (ac_size > 0) {
unsigned long dest_len;
GetByteContext agb = gb;
if (ac_count > 3LL * td->xsize * s->scan_lines_per_block)
return AVERROR_INVALIDDATA;
dest_len = ac_count * 2LL;
av_fast_padded_malloc(&td->ac_data, &td->ac_size, dest_len);
if (!td->ac_data)
return AVERROR(ENOMEM);
switch (ac_compression) {
case 0:
ret = huf_uncompress(s, td, &agb, (int16_t *)td->ac_data, ac_count);
if (ret < 0)
return ret;
break;
case 1:
if (uncompress(td->ac_data, &dest_len, agb.buffer, ac_size) != Z_OK ||
dest_len != ac_count * 2LL)
return AVERROR_INVALIDDATA;
break;
default:
return AVERROR_INVALIDDATA;
}
bytestream2_skip(&gb, ac_size);
}
{
unsigned long dest_len;
GetByteContext agb = gb;
if (dc_count != dc_w * dc_h * 3)
return AVERROR_INVALIDDATA;
dest_len = dc_count * 2LL;
av_fast_padded_malloc(&td->dc_data, &td->dc_size, FFALIGN(dest_len, 64) * 2);
if (!td->dc_data)
return AVERROR(ENOMEM);
if (uncompress(td->dc_data + FFALIGN(dest_len, 64), &dest_len, agb.buffer, dc_size) != Z_OK ||
(dest_len != dc_count * 2LL))
return AVERROR_INVALIDDATA;
s->dsp.predictor(td->dc_data + FFALIGN(dest_len, 64), dest_len);
s->dsp.reorder_pixels(td->dc_data, td->dc_data + FFALIGN(dest_len, 64), dest_len);
bytestream2_skip(&gb, dc_size);
}
if (rle_raw_size > 0 && rle_csize > 0 && rle_usize > 0) {
unsigned long dest_len = rle_usize;
av_fast_padded_malloc(&td->rle_data, &td->rle_size, rle_usize);
if (!td->rle_data)
return AVERROR(ENOMEM);
av_fast_padded_malloc(&td->rle_raw_data, &td->rle_raw_size, rle_raw_size);
if (!td->rle_raw_data)
return AVERROR(ENOMEM);
if (uncompress(td->rle_data, &dest_len, gb.buffer, rle_csize) != Z_OK ||
(dest_len != rle_usize))
return AVERROR_INVALIDDATA;
ret = rle(td->rle_raw_data, td->rle_data, rle_usize, rle_raw_size);
if (ret < 0)
return ret;
bytestream2_skip(&gb, rle_csize);
}
bytestream2_init(&agb, td->ac_data, ac_count * 2);
for (int y = 0; y < td->ysize; y += 8) {
for (int x = 0; x < td->xsize; x += 8) {
memset(td->block, 0, sizeof(td->block));
for (int j = 0; j < 3; j++) {
float *block = td->block[j];
const int idx = (x >> 3) + (y >> 3) * dc_w + dc_w * dc_h * j;
uint16_t *dc = (uint16_t *)td->dc_data;
union av_intfloat32 dc_val;
dc_val.i = half2float(dc[idx], s->mantissatable,
s->exponenttable, s->offsettable);
block[0] = dc_val.f;
ac_uncompress(s, &agb, block);
dct_inverse(block);
}
{
const float scale = s->pixel_type == EXR_FLOAT ? 2.f : 1.f;
const int o = s->nb_channels == 4;
float *bo = ((float *)td->uncompressed_data) +
y * td->xsize * s->nb_channels + td->xsize * (o + 0) + x;
float *go = ((float *)td->uncompressed_data) +
y * td->xsize * s->nb_channels + td->xsize * (o + 1) + x;
float *ro = ((float *)td->uncompressed_data) +
y * td->xsize * s->nb_channels + td->xsize * (o + 2) + x;
float *yb = td->block[0];
float *ub = td->block[1];
float *vb = td->block[2];
for (int yy = 0; yy < 8; yy++) {
for (int xx = 0; xx < 8; xx++) {
const int idx = xx + yy * 8;
convert(yb[idx], ub[idx], vb[idx], &bo[xx], &go[xx], &ro[xx]);
bo[xx] = to_linear(bo[xx], scale);
go[xx] = to_linear(go[xx], scale);
ro[xx] = to_linear(ro[xx], scale);
}
bo += td->xsize * s->nb_channels;
go += td->xsize * s->nb_channels;
ro += td->xsize * s->nb_channels;
}
}
}
}
if (s->nb_channels < 4)
return 0;
for (int y = 0; y < td->ysize && td->rle_raw_data; y++) {
uint32_t *ao = ((uint32_t *)td->uncompressed_data) + y * td->xsize * s->nb_channels;
uint8_t *ai0 = td->rle_raw_data + y * td->xsize;
uint8_t *ai1 = td->rle_raw_data + y * td->xsize + rle_raw_size / 2;
for (int x = 0; x < td->xsize; x++) {
uint16_t ha = ai0[x] | (ai1[x] << 8);
ao[x] = half2float(ha, s->mantissatable, s->exponenttable, s->offsettable);
}
}
return 0;
}
static int decode_block(AVCodecContext *avctx, void *tdata,
int jobnr, int threadnr)
{
EXRContext *s = avctx->priv_data;
AVFrame *const p = s->picture;
EXRThreadData *td = &s->thread_data[threadnr];
const uint8_t *channel_buffer[4] = { 0 };
const uint8_t *buf = s->buf;
uint64_t line_offset, uncompressed_size;
uint8_t *ptr;
uint32_t data_size;
int line, col = 0;
uint64_t tile_x, tile_y, tile_level_x, tile_level_y;
const uint8_t *src;
int step = s->desc->flags & AV_PIX_FMT_FLAG_FLOAT ? 4 : 2 * s->desc->nb_components;
int bxmin = 0, axmax = 0, window_xoffset = 0;
int window_xmin, window_xmax, window_ymin, window_ymax;
int data_xoffset, data_yoffset, data_window_offset, xsize, ysize;
int i, x, buf_size = s->buf_size;
int c, rgb_channel_count;
float one_gamma = 1.0f / s->gamma;
avpriv_trc_function trc_func = avpriv_get_trc_function_from_trc(s->apply_trc_type);
int ret;
line_offset = AV_RL64(s->gb.buffer + jobnr * 8);
if (s->is_tile) {
if (buf_size < 20 || line_offset > buf_size - 20)
return AVERROR_INVALIDDATA;
src = buf + line_offset + 20;
if (s->is_multipart)
src += 4;
tile_x = AV_RL32(src - 20);
tile_y = AV_RL32(src - 16);
tile_level_x = AV_RL32(src - 12);
tile_level_y = AV_RL32(src - 8);
data_size = AV_RL32(src - 4);
if (data_size <= 0 || data_size > buf_size - line_offset - 20)
return AVERROR_INVALIDDATA;
if (tile_level_x || tile_level_y) { /* tile level, is not the full res level */
avpriv_report_missing_feature(s->avctx, "Subres tile before full res tile");
return AVERROR_PATCHWELCOME;
}
if (tile_x && s->tile_attr.xSize + (int64_t)FFMAX(s->xmin, 0) >= INT_MAX / tile_x )
return AVERROR_INVALIDDATA;
if (tile_y && s->tile_attr.ySize + (int64_t)FFMAX(s->ymin, 0) >= INT_MAX / tile_y )
return AVERROR_INVALIDDATA;
line = s->ymin + s->tile_attr.ySize * tile_y;
col = s->tile_attr.xSize * tile_x;
if (line < s->ymin || line > s->ymax ||
s->xmin + col < s->xmin || s->xmin + col > s->xmax)
return AVERROR_INVALIDDATA;
td->ysize = FFMIN(s->tile_attr.ySize, s->ydelta - tile_y * s->tile_attr.ySize);
td->xsize = FFMIN(s->tile_attr.xSize, s->xdelta - tile_x * s->tile_attr.xSize);
if (td->xsize * (uint64_t)s->current_channel_offset > INT_MAX)
return AVERROR_INVALIDDATA;
td->channel_line_size = td->xsize * s->current_channel_offset;/* uncompress size of one line */
uncompressed_size = td->channel_line_size * (uint64_t)td->ysize;/* uncompress size of the block */
} else {
if (buf_size < 8 || line_offset > buf_size - 8)
return AVERROR_INVALIDDATA;
src = buf + line_offset + 8;
if (s->is_multipart)
src += 4;
line = AV_RL32(src - 8);
if (line < s->ymin || line > s->ymax)
return AVERROR_INVALIDDATA;
data_size = AV_RL32(src - 4);
if (data_size <= 0 || data_size > buf_size - line_offset - 8)
return AVERROR_INVALIDDATA;
td->ysize = FFMIN(s->scan_lines_per_block, s->ymax - line + 1); /* s->ydelta - line ?? */
td->xsize = s->xdelta;
if (td->xsize * (uint64_t)s->current_channel_offset > INT_MAX)
return AVERROR_INVALIDDATA;
td->channel_line_size = td->xsize * s->current_channel_offset;/* uncompress size of one line */
uncompressed_size = td->channel_line_size * (uint64_t)td->ysize;/* uncompress size of the block */
if ((s->compression == EXR_RAW && (data_size != uncompressed_size ||
line_offset > buf_size - uncompressed_size)) ||
(s->compression != EXR_RAW && (data_size > uncompressed_size ||
line_offset > buf_size - data_size))) {
return AVERROR_INVALIDDATA;
}
}
window_xmin = FFMIN(avctx->width, FFMAX(0, s->xmin + col));
window_xmax = FFMIN(avctx->width, FFMAX(0, s->xmin + col + td->xsize));
window_ymin = FFMIN(avctx->height, FFMAX(0, line ));
window_ymax = FFMIN(avctx->height, FFMAX(0, line + td->ysize));
xsize = window_xmax - window_xmin;
ysize = window_ymax - window_ymin;
/* tile or scanline not visible skip decoding */
if (xsize <= 0 || ysize <= 0)
return 0;
/* is the first tile or is a scanline */
if(col == 0) {
window_xmin = 0;
/* pixels to add at the left of the display window */
window_xoffset = FFMAX(0, s->xmin);
/* bytes to add at the left of the display window */
bxmin = window_xoffset * step;
}
/* is the last tile or is a scanline */
if(col + td->xsize == s->xdelta) {
window_xmax = avctx->width;
/* bytes to add at the right of the display window */
axmax = FFMAX(0, (avctx->width - (s->xmax + 1))) * step;
}
if (avctx->max_pixels && uncompressed_size > avctx->max_pixels * 16LL)
return AVERROR_INVALIDDATA;
if (data_size < uncompressed_size || s->is_tile) { /* td->tmp is use for tile reorganization */
av_fast_padded_malloc(&td->tmp, &td->tmp_size, uncompressed_size);
if (!td->tmp)
return AVERROR(ENOMEM);
}
if (data_size < uncompressed_size) {
av_fast_padded_malloc(&td->uncompressed_data,
&td->uncompressed_size, uncompressed_size + 64);/* Force 64 padding for AVX2 reorder_pixels dst */
if (!td->uncompressed_data)
return AVERROR(ENOMEM);
ret = AVERROR_INVALIDDATA;
switch (s->compression) {
case EXR_ZIP1:
case EXR_ZIP16:
ret = zip_uncompress(s, src, data_size, uncompressed_size, td);
break;
case EXR_PIZ:
ret = piz_uncompress(s, src, data_size, uncompressed_size, td);
break;
case EXR_PXR24:
ret = pxr24_uncompress(s, src, data_size, uncompressed_size, td);
break;
case EXR_RLE:
ret = rle_uncompress(s, src, data_size, uncompressed_size, td);
break;
case EXR_B44:
case EXR_B44A:
ret = b44_uncompress(s, src, data_size, uncompressed_size, td);
break;
case EXR_DWAA:
case EXR_DWAB:
ret = dwa_uncompress(s, src, data_size, uncompressed_size, td);
break;
}
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR, "decode_block() failed.\n");
return ret;
}
src = td->uncompressed_data;
}
/* offsets to crop data outside display window */
data_xoffset = FFABS(FFMIN(0, s->xmin + col)) * (s->pixel_type == EXR_HALF ? 2 : 4);
data_yoffset = FFABS(FFMIN(0, line));
data_window_offset = (data_yoffset * td->channel_line_size) + data_xoffset;
if (!s->is_luma) {
channel_buffer[0] = src + (td->xsize * s->channel_offsets[0]) + data_window_offset;
channel_buffer[1] = src + (td->xsize * s->channel_offsets[1]) + data_window_offset;
channel_buffer[2] = src + (td->xsize * s->channel_offsets[2]) + data_window_offset;
rgb_channel_count = 3;
} else { /* put y data in the first channel_buffer */
channel_buffer[0] = src + (td->xsize * s->channel_offsets[1]) + data_window_offset;
rgb_channel_count = 1;
}
if (s->channel_offsets[3] >= 0)
channel_buffer[3] = src + (td->xsize * s->channel_offsets[3]) + data_window_offset;
if (s->desc->flags & AV_PIX_FMT_FLAG_FLOAT) {
/* todo: change this when a floating point pixel format with luma with alpha is implemented */
int channel_count = s->channel_offsets[3] >= 0 ? 4 : rgb_channel_count;
if (s->is_luma) {
channel_buffer[1] = channel_buffer[0];
channel_buffer[2] = channel_buffer[0];
}
for (c = 0; c < channel_count; c++) {
int plane = s->desc->comp[c].plane;
ptr = p->data[plane] + window_ymin * p->linesize[plane] + (window_xmin * 4);
for (i = 0; i < ysize; i++, ptr += p->linesize[plane]) {
const uint8_t *src;
union av_intfloat32 *ptr_x;
src = channel_buffer[c];
ptr_x = (union av_intfloat32 *)ptr;
// Zero out the start if xmin is not 0
memset(ptr_x, 0, bxmin);
ptr_x += window_xoffset;
if (s->pixel_type == EXR_FLOAT ||
s->compression == EXR_DWAA ||
s->compression == EXR_DWAB) {
// 32-bit
union av_intfloat32 t;
if (trc_func && c < 3) {
for (x = 0; x < xsize; x++) {
t.i = bytestream_get_le32(&src);
t.f = trc_func(t.f);
*ptr_x++ = t;
}
} else if (one_gamma != 1.f) {
for (x = 0; x < xsize; x++) {
t.i = bytestream_get_le32(&src);
if (t.f > 0.0f && c < 3) /* avoid negative values */
t.f = powf(t.f, one_gamma);
*ptr_x++ = t;
}
} else {
for (x = 0; x < xsize; x++) {
t.i = bytestream_get_le32(&src);
*ptr_x++ = t;
}
}
} else if (s->pixel_type == EXR_HALF) {
// 16-bit
if (c < 3 || !trc_func) {
for (x = 0; x < xsize; x++) {
*ptr_x++ = s->gamma_table[bytestream_get_le16(&src)];
}
} else {
for (x = 0; x < xsize; x++) {
ptr_x[0].i = half2float(bytestream_get_le16(&src),
s->mantissatable,
s->exponenttable,
s->offsettable);
ptr_x++;
}
}
}
// Zero out the end if xmax+1 is not w
memset(ptr_x, 0, axmax);
channel_buffer[c] += td->channel_line_size;
}
}
} else {
av_assert1(s->pixel_type == EXR_UINT);
ptr = p->data[0] + window_ymin * p->linesize[0] + (window_xmin * s->desc->nb_components * 2);
for (i = 0; i < ysize; i++, ptr += p->linesize[0]) {
const uint8_t * a;
const uint8_t *rgb[3];
uint16_t *ptr_x;
for (c = 0; c < rgb_channel_count; c++) {
rgb[c] = channel_buffer[c];
}
if (channel_buffer[3])
a = channel_buffer[3];
ptr_x = (uint16_t *) ptr;
// Zero out the start if xmin is not 0
memset(ptr_x, 0, bxmin);
ptr_x += window_xoffset * s->desc->nb_components;
for (x = 0; x < xsize; x++) {
for (c = 0; c < rgb_channel_count; c++) {
*ptr_x++ = bytestream_get_le32(&rgb[c]) >> 16;
}
if (channel_buffer[3])
*ptr_x++ = bytestream_get_le32(&a) >> 16;
}
// Zero out the end if xmax+1 is not w
memset(ptr_x, 0, axmax);
channel_buffer[0] += td->channel_line_size;
channel_buffer[1] += td->channel_line_size;
channel_buffer[2] += td->channel_line_size;
if (channel_buffer[3])
channel_buffer[3] += td->channel_line_size;
}
}
return 0;
}
static void skip_header_chunk(EXRContext *s)
{
GetByteContext *gb = &s->gb;
while (bytestream2_get_bytes_left(gb) > 0) {
if (!bytestream2_peek_byte(gb))
break;
// Process unknown variables
for (int i = 0; i < 2; i++) // value_name and value_type
while (bytestream2_get_byte(gb) != 0);
// Skip variable length
bytestream2_skip(gb, bytestream2_get_le32(gb));
}
}
/**
* Check if the variable name corresponds to its data type.
*
* @param s the EXRContext
* @param value_name name of the variable to check
* @param value_type type of the variable to check
* @param minimum_length minimum length of the variable data
*
* @return bytes to read containing variable data
* -1 if variable is not found
* 0 if buffer ended prematurely
*/
static int check_header_variable(EXRContext *s,
const char *value_name,
const char *value_type,
unsigned int minimum_length)
{
GetByteContext *gb = &s->gb;
int var_size = -1;
if (bytestream2_get_bytes_left(gb) >= minimum_length &&
!strcmp(gb->buffer, value_name)) {
// found value_name, jump to value_type (null terminated strings)
gb->buffer += strlen(value_name) + 1;
if (!strcmp(gb->buffer, value_type)) {
gb->buffer += strlen(value_type) + 1;
var_size = bytestream2_get_le32(gb);
// don't go read past boundaries
if (var_size > bytestream2_get_bytes_left(gb))
var_size = 0;
} else {
// value_type not found, reset the buffer
gb->buffer -= strlen(value_name) + 1;
av_log(s->avctx, AV_LOG_WARNING,
"Unknown data type %s for header variable %s.\n",
value_type, value_name);
}
}
return var_size;
}
static int decode_header(EXRContext *s, AVFrame *frame)
{
AVDictionary *metadata = NULL;
GetByteContext *gb = &s->gb;
int magic_number, version, flags;
int layer_match = 0;
int ret;
int dup_channels = 0;
s->current_channel_offset = 0;
s->xmin = ~0;
s->xmax = ~0;
s->ymin = ~0;
s->ymax = ~0;
s->xdelta = ~0;
s->ydelta = ~0;
s->channel_offsets[0] = -1;
s->channel_offsets[1] = -1;
s->channel_offsets[2] = -1;
s->channel_offsets[3] = -1;
s->pixel_type = EXR_UNKNOWN;
s->compression = EXR_UNKN;
s->nb_channels = 0;
s->w = 0;
s->h = 0;
s->tile_attr.xSize = -1;
s->tile_attr.ySize = -1;
s->is_tile = 0;
s->is_multipart = 0;
s->is_luma = 0;
s->current_part = 0;
if (bytestream2_get_bytes_left(gb) < 10) {
av_log(s->avctx, AV_LOG_ERROR, "Header too short to parse.\n");
return AVERROR_INVALIDDATA;
}
magic_number = bytestream2_get_le32(gb);
if (magic_number != 20000630) {
/* As per documentation of OpenEXR, it is supposed to be
* int 20000630 little-endian */
av_log(s->avctx, AV_LOG_ERROR, "Wrong magic number %d.\n", magic_number);
return AVERROR_INVALIDDATA;
}
version = bytestream2_get_byte(gb);
if (version != 2) {
avpriv_report_missing_feature(s->avctx, "Version %d", version);
return AVERROR_PATCHWELCOME;
}
flags = bytestream2_get_le24(gb);
if (flags & 0x02)
s->is_tile = 1;
if (flags & 0x10)
s->is_multipart = 1;
if (flags & 0x08) {
avpriv_report_missing_feature(s->avctx, "deep data");
return AVERROR_PATCHWELCOME;
}
// Parse the header
while (bytestream2_get_bytes_left(gb) > 0) {
int var_size;
while (s->is_multipart && s->current_part < s->selected_part &&
bytestream2_get_bytes_left(gb) > 0) {
if (bytestream2_peek_byte(gb)) {
skip_header_chunk(s);
} else {
bytestream2_skip(gb, 1);
if (!bytestream2_peek_byte(gb))
break;
}
bytestream2_skip(gb, 1);
s->current_part++;
}
if (!bytestream2_peek_byte(gb)) {
if (!s->is_multipart)
break;
bytestream2_skip(gb, 1);
if (s->current_part == s->selected_part) {
while (bytestream2_get_bytes_left(gb) > 0) {
if (bytestream2_peek_byte(gb)) {
skip_header_chunk(s);
} else {
bytestream2_skip(gb, 1);
if (!bytestream2_peek_byte(gb))
break;
}
}
}
if (!bytestream2_peek_byte(gb))
break;
s->current_part++;
}
if ((var_size = check_header_variable(s, "channels",
"chlist", 38)) >= 0) {
GetByteContext ch_gb;
if (!var_size) {
ret = AVERROR_INVALIDDATA;
goto fail;
}
bytestream2_init(&ch_gb, gb->buffer, var_size);
while (bytestream2_get_bytes_left(&ch_gb) >= 19) {
EXRChannel *channel;
enum ExrPixelType current_pixel_type;
int channel_index = -1;
int xsub, ysub;
if (strcmp(s->layer, "") != 0) {
if (strncmp(ch_gb.buffer, s->layer, strlen(s->layer)) == 0) {
layer_match = 1;
av_log(s->avctx, AV_LOG_INFO,
"Channel match layer : %s.\n", ch_gb.buffer);
ch_gb.buffer += strlen(s->layer);
if (*ch_gb.buffer == '.')
ch_gb.buffer++; /* skip dot if not given */
} else {
layer_match = 0;
av_log(s->avctx, AV_LOG_INFO,
"Channel doesn't match layer : %s.\n", ch_gb.buffer);
}
} else {
layer_match = 1;
}
if (layer_match) { /* only search channel if the layer match is valid */
if (!av_strcasecmp(ch_gb.buffer, "R") ||
!av_strcasecmp(ch_gb.buffer, "X") ||
!av_strcasecmp(ch_gb.buffer, "U")) {
channel_index = 0;
s->is_luma = 0;
} else if (!av_strcasecmp(ch_gb.buffer, "G") ||
!av_strcasecmp(ch_gb.buffer, "V")) {
channel_index = 1;
s->is_luma = 0;
} else if (!av_strcasecmp(ch_gb.buffer, "Y")) {
channel_index = 1;
s->is_luma = 1;
} else if (!av_strcasecmp(ch_gb.buffer, "B") ||
!av_strcasecmp(ch_gb.buffer, "Z") ||
!av_strcasecmp(ch_gb.buffer, "W")) {
channel_index = 2;
s->is_luma = 0;
} else if (!av_strcasecmp(ch_gb.buffer, "A")) {
channel_index = 3;
} else {
av_log(s->avctx, AV_LOG_WARNING,
"Unsupported channel %.256s.\n", ch_gb.buffer);
}
}
/* skip until you get a 0 */
while (bytestream2_get_bytes_left(&ch_gb) > 0 &&
bytestream2_get_byte(&ch_gb))
continue;
if (bytestream2_get_bytes_left(&ch_gb) < 4) {
av_log(s->avctx, AV_LOG_ERROR, "Incomplete header.\n");
ret = AVERROR_INVALIDDATA;
goto fail;
}
current_pixel_type = bytestream2_get_le32(&ch_gb);
if (current_pixel_type >= EXR_UNKNOWN) {
avpriv_report_missing_feature(s->avctx, "Pixel type %d",
current_pixel_type);
ret = AVERROR_PATCHWELCOME;
goto fail;
}
bytestream2_skip(&ch_gb, 4);
xsub = bytestream2_get_le32(&ch_gb);
ysub = bytestream2_get_le32(&ch_gb);
if (xsub != 1 || ysub != 1) {
avpriv_report_missing_feature(s->avctx,
"Subsampling %dx%d",
xsub, ysub);
ret = AVERROR_PATCHWELCOME;
goto fail;
}
if (channel_index >= 0 && s->channel_offsets[channel_index] == -1) { /* channel has not been previously assigned */
if (s->pixel_type != EXR_UNKNOWN &&
s->pixel_type != current_pixel_type) {
av_log(s->avctx, AV_LOG_ERROR,
"RGB channels not of the same depth.\n");
ret = AVERROR_INVALIDDATA;
goto fail;
}
s->pixel_type = current_pixel_type;
s->channel_offsets[channel_index] = s->current_channel_offset;
} else if (channel_index >= 0) {
av_log(s->avctx, AV_LOG_WARNING,
"Multiple channels with index %d.\n", channel_index);
if (++dup_channels > 10) {
ret = AVERROR_INVALIDDATA;
goto fail;
}
}
s->channels = av_realloc(s->channels,
++s->nb_channels * sizeof(EXRChannel));
if (!s->channels) {
ret = AVERROR(ENOMEM);
goto fail;
}
channel = &s->channels[s->nb_channels - 1];
channel->pixel_type = current_pixel_type;
channel->xsub = xsub;
channel->ysub = ysub;
if (current_pixel_type == EXR_HALF) {
s->current_channel_offset += 2;
} else {/* Float or UINT32 */
s->current_channel_offset += 4;
}
}
/* Check if all channels are set with an offset or if the channels
* are causing an overflow */
if (!s->is_luma) {/* if we expected to have at least 3 channels */
if (FFMIN3(s->channel_offsets[0],
s->channel_offsets[1],
s->channel_offsets[2]) < 0) {
if (s->channel_offsets[0] < 0)
av_log(s->avctx, AV_LOG_ERROR, "Missing red channel.\n");
if (s->channel_offsets[1] < 0)
av_log(s->avctx, AV_LOG_ERROR, "Missing green channel.\n");
if (s->channel_offsets[2] < 0)
av_log(s->avctx, AV_LOG_ERROR, "Missing blue channel.\n");
ret = AVERROR_INVALIDDATA;
goto fail;
}
}
// skip one last byte and update main gb
gb->buffer = ch_gb.buffer + 1;
continue;
} else if ((var_size = check_header_variable(s, "dataWindow", "box2i",
31)) >= 0) {
int xmin, ymin, xmax, ymax;
if (!var_size) {
ret = AVERROR_INVALIDDATA;
goto fail;
}
xmin = bytestream2_get_le32(gb);
ymin = bytestream2_get_le32(gb);
xmax = bytestream2_get_le32(gb);
ymax = bytestream2_get_le32(gb);
if (xmin > xmax || ymin > ymax ||
ymax == INT_MAX || xmax == INT_MAX ||
(unsigned)xmax - xmin >= INT_MAX ||
(unsigned)ymax - ymin >= INT_MAX) {
ret = AVERROR_INVALIDDATA;
goto fail;
}
s->xmin = xmin;
s->xmax = xmax;
s->ymin = ymin;
s->ymax = ymax;
s->xdelta = (s->xmax - s->xmin) + 1;
s->ydelta = (s->ymax - s->ymin) + 1;
continue;
} else if ((var_size = check_header_variable(s, "displayWindow",
"box2i", 34)) >= 0) {
int32_t sx, sy, dx, dy;
if (!var_size) {
ret = AVERROR_INVALIDDATA;
goto fail;
}
sx = bytestream2_get_le32(gb);
sy = bytestream2_get_le32(gb);
dx = bytestream2_get_le32(gb);
dy = bytestream2_get_le32(gb);
s->w = (unsigned)dx - sx + 1;
s->h = (unsigned)dy - sy + 1;
continue;
} else if ((var_size = check_header_variable(s, "lineOrder",
"lineOrder", 25)) >= 0) {
int line_order;
if (!var_size) {
ret = AVERROR_INVALIDDATA;
goto fail;
}
line_order = bytestream2_get_byte(gb);
av_log(s->avctx, AV_LOG_DEBUG, "line order: %d.\n", line_order);
if (line_order > 2) {
av_log(s->avctx, AV_LOG_ERROR, "Unknown line order.\n");
ret = AVERROR_INVALIDDATA;
goto fail;
}
continue;
} else if ((var_size = check_header_variable(s, "pixelAspectRatio",
"float", 31)) >= 0) {
if (!var_size) {
ret = AVERROR_INVALIDDATA;
goto fail;
}
s->sar = bytestream2_get_le32(gb);
continue;
} else if ((var_size = check_header_variable(s, "compression",
"compression", 29)) >= 0) {
if (!var_size) {
ret = AVERROR_INVALIDDATA;
goto fail;
}
if (s->compression == EXR_UNKN)
s->compression = bytestream2_get_byte(gb);
else {
bytestream2_skip(gb, 1);
av_log(s->avctx, AV_LOG_WARNING,
"Found more than one compression attribute.\n");
}
continue;
} else if ((var_size = check_header_variable(s, "tiles",
"tiledesc", 22)) >= 0) {
char tileLevel;
if (!s->is_tile)
av_log(s->avctx, AV_LOG_WARNING,
"Found tile attribute and scanline flags. Exr will be interpreted as scanline.\n");
s->tile_attr.xSize = bytestream2_get_le32(gb);
s->tile_attr.ySize = bytestream2_get_le32(gb);
tileLevel = bytestream2_get_byte(gb);
s->tile_attr.level_mode = tileLevel & 0x0f;
s->tile_attr.level_round = (tileLevel >> 4) & 0x0f;
if (s->tile_attr.level_mode >= EXR_TILE_LEVEL_UNKNOWN) {
avpriv_report_missing_feature(s->avctx, "Tile level mode %d",
s->tile_attr.level_mode);
ret = AVERROR_PATCHWELCOME;
goto fail;
}
if (s->tile_attr.level_round >= EXR_TILE_ROUND_UNKNOWN) {
avpriv_report_missing_feature(s->avctx, "Tile level round %d",
s->tile_attr.level_round);
ret = AVERROR_PATCHWELCOME;
goto fail;
}
continue;
} else if ((var_size = check_header_variable(s, "writer",
"string", 1)) >= 0) {
uint8_t key[256] = { 0 };
bytestream2_get_buffer(gb, key, FFMIN(sizeof(key) - 1, var_size));
av_dict_set(&metadata, "writer", key, 0);
continue;
} else if ((var_size = check_header_variable(s, "framesPerSecond",
"rational", 33)) >= 0) {
if (!var_size) {
ret = AVERROR_INVALIDDATA;
goto fail;
}
s->avctx->framerate.num = bytestream2_get_le32(gb);
s->avctx->framerate.den = bytestream2_get_le32(gb);
continue;
} else if ((var_size = check_header_variable(s, "chunkCount",
"int", 23)) >= 0) {
s->chunk_count = bytestream2_get_le32(gb);
continue;
} else if ((var_size = check_header_variable(s, "type",
"string", 16)) >= 0) {
uint8_t key[256] = { 0 };
bytestream2_get_buffer(gb, key, FFMIN(sizeof(key) - 1, var_size));
if (strncmp("scanlineimage", key, var_size) &&
strncmp("tiledimage", key, var_size))
return AVERROR_PATCHWELCOME;
continue;
} else if ((var_size = check_header_variable(s, "preview",
"preview", 16)) >= 0) {
uint32_t pw = bytestream2_get_le32(gb);
uint32_t ph = bytestream2_get_le32(gb);
int64_t psize = 4LL * pw * ph;
if (psize >= bytestream2_get_bytes_left(gb))
return AVERROR_INVALIDDATA;
bytestream2_skip(gb, psize);
continue;
}
// Check if there are enough bytes for a header
if (bytestream2_get_bytes_left(gb) <= 9) {
av_log(s->avctx, AV_LOG_ERROR, "Incomplete header\n");
ret = AVERROR_INVALIDDATA;
goto fail;
}
// Process unknown variables
{
uint8_t name[256] = { 0 };
uint8_t type[256] = { 0 };
uint8_t value[256] = { 0 };
int i = 0, size;
while (bytestream2_get_bytes_left(gb) > 0 &&
bytestream2_peek_byte(gb) && i < 255) {
name[i++] = bytestream2_get_byte(gb);
}
bytestream2_skip(gb, 1);
i = 0;
while (bytestream2_get_bytes_left(gb) > 0 &&
bytestream2_peek_byte(gb) && i < 255) {
type[i++] = bytestream2_get_byte(gb);
}
bytestream2_skip(gb, 1);
size = bytestream2_get_le32(gb);
bytestream2_get_buffer(gb, value, FFMIN(sizeof(value) - 1, size));
if (!strcmp(type, "string"))
av_dict_set(&metadata, name, value, 0);
}
}
if (s->compression == EXR_UNKN) {
av_log(s->avctx, AV_LOG_ERROR, "Missing compression attribute.\n");
ret = AVERROR_INVALIDDATA;
goto fail;
}
if (s->is_tile) {
if (s->tile_attr.xSize < 1 || s->tile_attr.ySize < 1) {
av_log(s->avctx, AV_LOG_ERROR, "Invalid tile attribute.\n");
ret = AVERROR_INVALIDDATA;
goto fail;
}
}
if (bytestream2_get_bytes_left(gb) <= 0) {
av_log(s->avctx, AV_LOG_ERROR, "Incomplete frame.\n");
ret = AVERROR_INVALIDDATA;
goto fail;
}
frame->metadata = metadata;
// aaand we are done
bytestream2_skip(gb, 1);
return 0;
fail:
av_dict_free(&metadata);
return ret;
}
static int decode_frame(AVCodecContext *avctx, AVFrame *picture,
int *got_frame, AVPacket *avpkt)
{
EXRContext *s = avctx->priv_data;
GetByteContext *gb = &s->gb;
uint8_t *ptr;
int i, y, ret, ymax;
int planes;
int out_line_size;
int nb_blocks; /* nb scanline or nb tile */
uint64_t start_offset_table;
uint64_t start_next_scanline;
PutByteContext offset_table_writer;
bytestream2_init(gb, avpkt->data, avpkt->size);
if ((ret = decode_header(s, picture)) < 0)
return ret;
if ((s->compression == EXR_DWAA || s->compression == EXR_DWAB) &&
s->pixel_type == EXR_HALF) {
s->current_channel_offset *= 2;
for (int i = 0; i < 4; i++)
s->channel_offsets[i] *= 2;
}
switch (s->pixel_type) {
case EXR_FLOAT:
case EXR_HALF:
if (s->channel_offsets[3] >= 0) {
if (!s->is_luma) {
avctx->pix_fmt = AV_PIX_FMT_GBRAPF32;
} else {
/* todo: change this when a floating point pixel format with luma with alpha is implemented */
avctx->pix_fmt = AV_PIX_FMT_GBRAPF32;
}
} else {
if (!s->is_luma) {
avctx->pix_fmt = AV_PIX_FMT_GBRPF32;
} else {
avctx->pix_fmt = AV_PIX_FMT_GRAYF32;
}
}
break;
case EXR_UINT:
if (s->channel_offsets[3] >= 0) {
if (!s->is_luma) {
avctx->pix_fmt = AV_PIX_FMT_RGBA64;
} else {
avctx->pix_fmt = AV_PIX_FMT_YA16;
}
} else {
if (!s->is_luma) {
avctx->pix_fmt = AV_PIX_FMT_RGB48;
} else {
avctx->pix_fmt = AV_PIX_FMT_GRAY16;
}
}
break;
default:
av_log(avctx, AV_LOG_ERROR, "Missing channel list.\n");
return AVERROR_INVALIDDATA;
}
if (s->apply_trc_type != AVCOL_TRC_UNSPECIFIED)
avctx->color_trc = s->apply_trc_type;
switch (s->compression) {
case EXR_RAW:
case EXR_RLE:
case EXR_ZIP1:
s->scan_lines_per_block = 1;
break;
case EXR_PXR24:
case EXR_ZIP16:
s->scan_lines_per_block = 16;
break;
case EXR_PIZ:
case EXR_B44:
case EXR_B44A:
case EXR_DWAA:
s->scan_lines_per_block = 32;
break;
case EXR_DWAB:
s->scan_lines_per_block = 256;
break;
default:
avpriv_report_missing_feature(avctx, "Compression %d", s->compression);
return AVERROR_PATCHWELCOME;
}
/* Verify the xmin, xmax, ymin and ymax before setting the actual image size.
* It's possible for the data window can larger or outside the display window */
if (s->xmin > s->xmax || s->ymin > s->ymax ||
s->ydelta == 0xFFFFFFFF || s->xdelta == 0xFFFFFFFF) {
av_log(avctx, AV_LOG_ERROR, "Wrong or missing size information.\n");
return AVERROR_INVALIDDATA;
}
if ((ret = ff_set_dimensions(avctx, s->w, s->h)) < 0)
return ret;
ff_set_sar(s->avctx, av_d2q(av_int2float(s->sar), 255));
s->desc = av_pix_fmt_desc_get(avctx->pix_fmt);
if (!s->desc)
return AVERROR_INVALIDDATA;
if (s->desc->flags & AV_PIX_FMT_FLAG_FLOAT) {
planes = s->desc->nb_components;
out_line_size = avctx->width * 4;
} else {
planes = 1;
out_line_size = avctx->width * 2 * s->desc->nb_components;
}
if (s->is_tile) {
nb_blocks = ((s->xdelta + s->tile_attr.xSize - 1) / s->tile_attr.xSize) *
((s->ydelta + s->tile_attr.ySize - 1) / s->tile_attr.ySize);
} else { /* scanline */
nb_blocks = (s->ydelta + s->scan_lines_per_block - 1) /
s->scan_lines_per_block;
}
if ((ret = ff_thread_get_buffer(avctx, picture, 0)) < 0)
return ret;
if (bytestream2_get_bytes_left(gb)/8 < nb_blocks)
return AVERROR_INVALIDDATA;
// check offset table and recreate it if need
if (!s->is_tile && bytestream2_peek_le64(gb) == 0) {
av_log(s->avctx, AV_LOG_DEBUG, "recreating invalid scanline offset table\n");
start_offset_table = bytestream2_tell(gb);
start_next_scanline = start_offset_table + nb_blocks * 8;
bytestream2_init_writer(&offset_table_writer, &avpkt->data[start_offset_table], nb_blocks * 8);
for (y = 0; y < nb_blocks; y++) {
/* write offset of prev scanline in offset table */
bytestream2_put_le64(&offset_table_writer, start_next_scanline);
/* get len of next scanline */
bytestream2_seek(gb, start_next_scanline + 4, SEEK_SET);/* skip line number */
start_next_scanline += (bytestream2_get_le32(gb) + 8);
}
bytestream2_seek(gb, start_offset_table, SEEK_SET);
}
// save pointer we are going to use in decode_block
s->buf = avpkt->data;
s->buf_size = avpkt->size;
// Zero out the start if ymin is not 0
for (i = 0; i < planes; i++) {
ptr = picture->data[i];
for (y = 0; y < FFMIN(s->ymin, s->h); y++) {
memset(ptr, 0, out_line_size);
ptr += picture->linesize[i];
}
}
s->picture = picture;
avctx->execute2(avctx, decode_block, s->thread_data, NULL, nb_blocks);
ymax = FFMAX(0, s->ymax + 1);
// Zero out the end if ymax+1 is not h
if (ymax < avctx->height)
for (i = 0; i < planes; i++) {
ptr = picture->data[i] + (ymax * picture->linesize[i]);
for (y = ymax; y < avctx->height; y++) {
memset(ptr, 0, out_line_size);
ptr += picture->linesize[i];
}
}
picture->pict_type = AV_PICTURE_TYPE_I;
*got_frame = 1;
return avpkt->size;
}
static av_cold int decode_init(AVCodecContext *avctx)
{
EXRContext *s = avctx->priv_data;
uint32_t i;
union av_intfloat32 t;
float one_gamma = 1.0f / s->gamma;
avpriv_trc_function trc_func = NULL;
half2float_table(s->mantissatable, s->exponenttable, s->offsettable);
s->avctx = avctx;
ff_exrdsp_init(&s->dsp);
#if HAVE_BIGENDIAN
ff_bswapdsp_init(&s->bbdsp);
#endif
trc_func = avpriv_get_trc_function_from_trc(s->apply_trc_type);
if (trc_func) {
for (i = 0; i < 65536; ++i) {
t.i = half2float(i, s->mantissatable, s->exponenttable, s->offsettable);
t.f = trc_func(t.f);
s->gamma_table[i] = t;
}
} else {
if (one_gamma > 0.9999f && one_gamma < 1.0001f) {
for (i = 0; i < 65536; ++i) {
s->gamma_table[i].i = half2float(i, s->mantissatable, s->exponenttable, s->offsettable);
}
} else {
for (i = 0; i < 65536; ++i) {
t.i = half2float(i, s->mantissatable, s->exponenttable, s->offsettable);
/* If negative value we reuse half value */
if (t.f <= 0.0f) {
s->gamma_table[i] = t;
} else {
t.f = powf(t.f, one_gamma);
s->gamma_table[i] = t;
}
}
}
}
// allocate thread data, used for non EXR_RAW compression types
s->thread_data = av_calloc(avctx->thread_count, sizeof(*s->thread_data));
if (!s->thread_data)
return AVERROR(ENOMEM);
return 0;
}
static av_cold int decode_end(AVCodecContext *avctx)
{
EXRContext *s = avctx->priv_data;
int i;
for (i = 0; i < avctx->thread_count; i++) {
EXRThreadData *td = &s->thread_data[i];
av_freep(&td->uncompressed_data);
av_freep(&td->tmp);
av_freep(&td->bitmap);
av_freep(&td->lut);
av_freep(&td->he);
av_freep(&td->freq);
av_freep(&td->ac_data);
av_freep(&td->dc_data);
av_freep(&td->rle_data);
av_freep(&td->rle_raw_data);
ff_free_vlc(&td->vlc);
}
av_freep(&s->thread_data);
av_freep(&s->channels);
return 0;
}
#define OFFSET(x) offsetof(EXRContext, x)
#define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
static const AVOption options[] = {
{ "layer", "Set the decoding layer", OFFSET(layer),
AV_OPT_TYPE_STRING, { .str = "" }, 0, 0, VD },
{ "part", "Set the decoding part", OFFSET(selected_part),
AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VD },
{ "gamma", "Set the float gamma value when decoding", OFFSET(gamma),
AV_OPT_TYPE_FLOAT, { .dbl = 1.0f }, 0.001, FLT_MAX, VD },
// XXX: Note the abuse of the enum using AVCOL_TRC_UNSPECIFIED to subsume the existing gamma option
{ "apply_trc", "color transfer characteristics to apply to EXR linear input", OFFSET(apply_trc_type),
AV_OPT_TYPE_INT, {.i64 = AVCOL_TRC_UNSPECIFIED }, 1, AVCOL_TRC_NB-1, VD, "apply_trc_type"},
{ "bt709", "BT.709", 0,
AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_BT709 }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
{ "gamma", "gamma", 0,
AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_UNSPECIFIED }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
{ "gamma22", "BT.470 M", 0,
AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_GAMMA22 }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
{ "gamma28", "BT.470 BG", 0,
AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_GAMMA28 }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
{ "smpte170m", "SMPTE 170 M", 0,
AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_SMPTE170M }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
{ "smpte240m", "SMPTE 240 M", 0,
AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_SMPTE240M }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
{ "linear", "Linear", 0,
AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_LINEAR }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
{ "log", "Log", 0,
AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_LOG }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
{ "log_sqrt", "Log square root", 0,
AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_LOG_SQRT }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
{ "iec61966_2_4", "IEC 61966-2-4", 0,
AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_IEC61966_2_4 }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
{ "bt1361", "BT.1361", 0,
AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_BT1361_ECG }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
{ "iec61966_2_1", "IEC 61966-2-1", 0,
AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_IEC61966_2_1 }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
{ "bt2020_10bit", "BT.2020 - 10 bit", 0,
AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_BT2020_10 }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
{ "bt2020_12bit", "BT.2020 - 12 bit", 0,
AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_BT2020_12 }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
{ "smpte2084", "SMPTE ST 2084", 0,
AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_SMPTEST2084 }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
{ "smpte428_1", "SMPTE ST 428-1", 0,
AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_SMPTEST428_1 }, INT_MIN, INT_MAX, VD, "apply_trc_type"},
{ NULL },
};
static const AVClass exr_class = {
.class_name = "EXR",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
const FFCodec ff_exr_decoder = {
.p.name = "exr",
.p.long_name = NULL_IF_CONFIG_SMALL("OpenEXR image"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_EXR,
.priv_data_size = sizeof(EXRContext),
.init = decode_init,
.close = decode_end,
FF_CODEC_DECODE_CB(decode_frame),
.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS |
AV_CODEC_CAP_SLICE_THREADS,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
.p.priv_class = &exr_class,
};
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