/lib/ffmpeg/libavcodec/exr.c
C | 830 lines | 624 code | 124 blank | 82 comment | 148 complexity | 5d5e50592f8d09dba58c5327587b77c5 MD5 | raw file
Possible License(s): GPL-3.0, CC-BY-SA-3.0, LGPL-2.0, 0BSD, Unlicense, GPL-2.0, AGPL-1.0, BSD-3-Clause, LGPL-2.1, LGPL-3.0
- /*
- * OpenEXR (.exr) image decoder
- * Copyright (c) 2009 Jimmy Christensen
- *
- * 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/
- *
- * exr_flt2uint() and exr_halflt2uint() is credited to Reimar D??ffinger
- */
- #include <zlib.h>
- #include "avcodec.h"
- #include "bytestream.h"
- #include "mathops.h"
- #include "thread.h"
- #include "libavutil/imgutils.h"
- #include "libavutil/avassert.h"
- enum ExrCompr {
- EXR_RAW = 0,
- EXR_RLE = 1,
- EXR_ZIP1 = 2,
- EXR_ZIP16 = 3,
- EXR_PIZ = 4,
- EXR_PXR24 = 5,
- EXR_B44 = 6,
- EXR_B44A = 7,
- };
- enum ExrPixelType {
- EXR_UINT,
- EXR_HALF,
- EXR_FLOAT
- };
- typedef struct EXRChannel {
- int xsub, ysub;
- enum ExrPixelType pixel_type;
- } EXRChannel;
- typedef struct EXRThreadData {
- uint8_t *uncompressed_data;
- int uncompressed_size;
- uint8_t *tmp;
- int tmp_size;
- } EXRThreadData;
- typedef struct EXRContext {
- AVFrame picture;
- int compr;
- enum ExrPixelType pixel_type;
- int channel_offsets[4]; // 0 = red, 1 = green, 2 = blue and 3 = alpha
- const AVPixFmtDescriptor *desc;
- uint32_t xmax, xmin;
- uint32_t ymax, ymin;
- uint32_t xdelta, ydelta;
- int ysize;
- uint64_t scan_line_size;
- int scan_lines_per_block;
- const uint8_t *buf, *table;
- int buf_size;
- EXRChannel *channels;
- int nb_channels;
- EXRThreadData *thread_data;
- int thread_data_size;
- } EXRContext;
- /**
- * Converts from 32-bit float as uint32_t to uint16_t
- *
- * @param v 32-bit float
- * @return normalized 16-bit unsigned int
- */
- static inline uint16_t exr_flt2uint(uint32_t v)
- {
- unsigned int exp = v >> 23;
- // "HACK": negative values result in exp< 0, so clipping them to 0
- // is also handled by this condition, avoids explicit check for sign bit.
- if (exp<= 127 + 7 - 24) // we would shift out all bits anyway
- return 0;
- if (exp >= 127)
- return 0xffff;
- v &= 0x007fffff;
- return (v + (1 << 23)) >> (127 + 7 - exp);
- }
- /**
- * Converts from 16-bit float as uint16_t to uint16_t
- *
- * @param v 16-bit float
- * @return normalized 16-bit unsigned int
- */
- static inline uint16_t exr_halflt2uint(uint16_t v)
- {
- unsigned exp = 14 - (v >> 10);
- if (exp >= 14) {
- if (exp == 14) return (v >> 9) & 1;
- else return (v & 0x8000) ? 0 : 0xffff;
- }
- v <<= 6;
- return (v + (1 << 16)) >> (exp + 1);
- }
- /**
- * Gets the size of the header variable
- *
- * @param **buf the current pointer location in the header where
- * the variable data starts
- * @param *buf_end pointer location of the end of the buffer
- * @return size of variable data
- */
- static unsigned int get_header_variable_length(const uint8_t **buf,
- const uint8_t *buf_end)
- {
- unsigned int variable_buffer_data_size = bytestream_get_le32(buf);
- if (variable_buffer_data_size >= buf_end - *buf)
- return 0;
- return variable_buffer_data_size;
- }
- /**
- * Checks if the variable name corresponds with it's data type
- *
- * @param *avctx the AVCodecContext
- * @param **buf the current pointer location in the header where
- * the variable name starts
- * @param *buf_end pointer location of the end of the buffer
- * @param *value_name name of the varible to check
- * @param *value_type type of the varible to check
- * @param minimum_length minimum length of the variable data
- * @param variable_buffer_data_size variable length read from the header
- * after it's checked
- * @return negative if variable is invalid
- */
- static int check_header_variable(AVCodecContext *avctx,
- const uint8_t **buf,
- const uint8_t *buf_end,
- const char *value_name,
- const char *value_type,
- unsigned int minimum_length,
- unsigned int *variable_buffer_data_size)
- {
- if (buf_end - *buf >= minimum_length && !strcmp(*buf, value_name)) {
- *buf += strlen(value_name)+1;
- if (!strcmp(*buf, value_type)) {
- *buf += strlen(value_type)+1;
- *variable_buffer_data_size = get_header_variable_length(buf, buf_end);
- if (!*variable_buffer_data_size)
- av_log(avctx, AV_LOG_ERROR, "Incomplete header\n");
- return 1;
- }
- *buf -= strlen(value_name)+1;
- av_log(avctx, AV_LOG_WARNING, "Unknown data type for header variable %s\n", value_name);
- }
- return -1;
- }
- static void predictor(uint8_t *src, int size)
- {
- uint8_t *t = src + 1;
- uint8_t *stop = src + size;
- while (t < stop) {
- int d = (int)t[-1] + (int)t[0] - 128;
- t[0] = d;
- ++t;
- }
- }
- static void reorder_pixels(uint8_t *src, uint8_t *dst, int size)
- {
- const int8_t *t1 = src;
- const int8_t *t2 = src + (size + 1) / 2;
- int8_t *s = dst;
- int8_t *stop = s + size;
- while (1) {
- if (s < stop)
- *(s++) = *(t1++);
- else
- break;
- if (s < stop)
- *(s++) = *(t2++);
- else
- break;
- }
- }
- static int zip_uncompress(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(EINVAL);
- predictor(td->tmp, uncompressed_size);
- reorder_pixels(td->tmp, td->uncompressed_data, uncompressed_size);
- return 0;
- }
- static int rle_uncompress(const uint8_t *src, int compressed_size,
- int uncompressed_size, EXRThreadData *td)
- {
- int8_t *d = (int8_t *)td->tmp;
- const int8_t *s = (const int8_t *)src;
- int ssize = compressed_size;
- int dsize = uncompressed_size;
- int8_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 -1;
- while (count--)
- *d++ = *s++;
- } else {
- count++;
- if ((dsize -= count) < 0 ||
- (ssize -= 2 ) < 0)
- return -1;
- while (count--)
- *d++ = *s;
- s++;
- }
- }
- if (dend != d)
- return AVERROR_INVALIDDATA;
- predictor(td->tmp, uncompressed_size);
- reorder_pixels(td->tmp, td->uncompressed_data, uncompressed_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 = uncompressed_size;
- const uint8_t *in = td->tmp;
- uint8_t *out;
- int c, i, j;
- if (uncompress(td->tmp, &dest_len, src, compressed_size) != Z_OK ||
- dest_len != uncompressed_size)
- return AVERROR(EINVAL);
- out = td->uncompressed_data;
- for (i = 0; i < s->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] + s->xdelta;
- ptr[2] = ptr[1] + s->xdelta;
- in = ptr[2] + s->xdelta;
- for (j = 0; j < s->xdelta; ++j) {
- uint32_t diff = (*(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] + s->xdelta;
- in = ptr[1] + s->xdelta;
- for (j = 0; j < s->xdelta; j++) {
- uint32_t diff = (*(ptr[0]++) << 8) | *(ptr[1]++);
- pixel += diff;
- bytestream_put_le16(&out, pixel);
- }
- break;
- default:
- av_assert1(0);
- }
- }
- }
- 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;
- uint32_t xdelta = s->xdelta;
- uint16_t *ptr_x;
- uint8_t *ptr;
- int32_t data_size, line;
- const uint8_t *src;
- int axmax = (avctx->width - (s->xmax + 1)) * 2 * s->desc->nb_components;
- int bxmin = s->xmin * 2 * s->desc->nb_components;
- int ret, i, x, buf_size = s->buf_size;
- line_offset = AV_RL64(s->table + jobnr * 8);
- // Check if the buffer has the required bytes needed from the offset
- if (line_offset > buf_size - 8)
- return AVERROR_INVALIDDATA;
- src = buf + line_offset + 8;
- 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)
- return AVERROR_INVALIDDATA;
- s->ysize = FFMIN(s->scan_lines_per_block, s->ymax - line + 1);
- uncompressed_size = s->scan_line_size * s->ysize;
- if ((s->compr == EXR_RAW && (data_size != uncompressed_size ||
- line_offset > buf_size - uncompressed_size)) ||
- (s->compr != EXR_RAW && (data_size > uncompressed_size ||
- line_offset > buf_size - data_size))) {
- return AVERROR_INVALIDDATA;
- }
- if (data_size < uncompressed_size) {
- av_fast_padded_malloc(&td->uncompressed_data, &td->uncompressed_size, uncompressed_size);
- av_fast_padded_malloc(&td->tmp, &td->tmp_size, uncompressed_size);
- if (!td->uncompressed_data || !td->tmp)
- return AVERROR(ENOMEM);
- switch (s->compr) {
- case EXR_ZIP1:
- case EXR_ZIP16:
- ret = zip_uncompress(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(src, data_size, uncompressed_size, td);
- }
- src = td->uncompressed_data;
- }
- channel_buffer[0] = src + xdelta * s->channel_offsets[0];
- channel_buffer[1] = src + xdelta * s->channel_offsets[1];
- channel_buffer[2] = src + xdelta * s->channel_offsets[2];
- if (s->channel_offsets[3] >= 0)
- channel_buffer[3] = src + xdelta * s->channel_offsets[3];
- ptr = p->data[0] + line * p->linesize[0];
- for (i = 0; i < s->scan_lines_per_block && line + i <= s->ymax; i++, ptr += p->linesize[0]) {
- const uint8_t *r, *g, *b, *a;
- r = channel_buffer[0];
- g = channel_buffer[1];
- b = channel_buffer[2];
- 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 += s->xmin * s->desc->nb_components;
- if (s->pixel_type == EXR_FLOAT) {
- // 32-bit
- for (x = 0; x < xdelta; x++) {
- *ptr_x++ = exr_flt2uint(bytestream_get_le32(&r));
- *ptr_x++ = exr_flt2uint(bytestream_get_le32(&g));
- *ptr_x++ = exr_flt2uint(bytestream_get_le32(&b));
- if (channel_buffer[3])
- *ptr_x++ = exr_flt2uint(bytestream_get_le32(&a));
- }
- } else {
- // 16-bit
- for (x = 0; x < xdelta; x++) {
- *ptr_x++ = exr_halflt2uint(bytestream_get_le16(&r));
- *ptr_x++ = exr_halflt2uint(bytestream_get_le16(&g));
- *ptr_x++ = exr_halflt2uint(bytestream_get_le16(&b));
- if (channel_buffer[3])
- *ptr_x++ = exr_halflt2uint(bytestream_get_le16(&a));
- }
- }
- // Zero out the end if xmax+1 is not w
- memset(ptr_x, 0, axmax);
- channel_buffer[0] += s->scan_line_size;
- channel_buffer[1] += s->scan_line_size;
- channel_buffer[2] += s->scan_line_size;
- if (channel_buffer[3])
- channel_buffer[3] += s->scan_line_size;
- }
- return 0;
- }
- static int decode_frame(AVCodecContext *avctx,
- void *data,
- int *got_frame,
- AVPacket *avpkt)
- {
- const uint8_t *buf = avpkt->data;
- unsigned int buf_size = avpkt->size;
- const uint8_t *buf_end = buf + buf_size;
- EXRContext *const s = avctx->priv_data;
- AVFrame *picture = data;
- AVFrame *const p = &s->picture;
- uint8_t *ptr;
- int i, y, magic_number, version, flags, ret;
- int w = 0;
- int h = 0;
- int out_line_size;
- int scan_line_blocks;
- unsigned int 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 = -1;
- s->nb_channels = 0;
- s->compr = -1;
- s->buf = buf;
- s->buf_size = buf_size;
- if (buf_size < 10) {
- av_log(avctx, AV_LOG_ERROR, "Too short header to parse\n");
- return AVERROR_INVALIDDATA;
- }
- magic_number = bytestream_get_le32(&buf);
- if (magic_number != 20000630) { // As per documentation of OpenEXR it's supposed to be int 20000630 little-endian
- av_log(avctx, AV_LOG_ERROR, "Wrong magic number %d\n", magic_number);
- return AVERROR_INVALIDDATA;
- }
- version = bytestream_get_byte(&buf);
- if (version != 2) {
- av_log(avctx, AV_LOG_ERROR, "Unsupported version %d\n", version);
- return AVERROR_PATCHWELCOME;
- }
- flags = bytestream_get_le24(&buf);
- if (flags & 0x2) {
- av_log(avctx, AV_LOG_ERROR, "Tile based images are not supported\n");
- return AVERROR_PATCHWELCOME;
- }
- // Parse the header
- while (buf < buf_end && buf[0]) {
- unsigned int variable_buffer_data_size;
- // Process the channel list
- if (check_header_variable(avctx, &buf, buf_end, "channels", "chlist", 38, &variable_buffer_data_size) >= 0) {
- const uint8_t *channel_list_end;
- if (!variable_buffer_data_size)
- return AVERROR_INVALIDDATA;
- channel_list_end = buf + variable_buffer_data_size;
- while (channel_list_end - buf >= 19) {
- EXRChannel *channel;
- int current_pixel_type = -1;
- int channel_index = -1;
- int xsub, ysub;
- if (!strcmp(buf, "R"))
- channel_index = 0;
- else if (!strcmp(buf, "G"))
- channel_index = 1;
- else if (!strcmp(buf, "B"))
- channel_index = 2;
- else if (!strcmp(buf, "A"))
- channel_index = 3;
- else
- av_log(avctx, AV_LOG_WARNING, "Unsupported channel %.256s\n", buf);
- while (bytestream_get_byte(&buf) && buf < channel_list_end)
- continue; /* skip */
- if (channel_list_end - * &buf < 4) {
- av_log(avctx, AV_LOG_ERROR, "Incomplete header\n");
- return AVERROR_INVALIDDATA;
- }
- current_pixel_type = bytestream_get_le32(&buf);
- if (current_pixel_type > 2) {
- av_log(avctx, AV_LOG_ERROR, "Unknown pixel type\n");
- return AVERROR_INVALIDDATA;
- }
- buf += 4;
- xsub = bytestream_get_le32(&buf);
- ysub = bytestream_get_le32(&buf);
- if (xsub != 1 || ysub != 1) {
- av_log(avctx, AV_LOG_ERROR, "Unsupported subsampling %dx%d\n", xsub, ysub);
- return AVERROR_PATCHWELCOME;
- }
- if (channel_index >= 0) {
- if (s->pixel_type != -1 && s->pixel_type != current_pixel_type) {
- av_log(avctx, AV_LOG_ERROR, "RGB channels not of the same depth\n");
- return AVERROR_INVALIDDATA;
- }
- s->pixel_type = current_pixel_type;
- s->channel_offsets[channel_index] = current_channel_offset;
- }
- s->channels = av_realloc_f(s->channels, ++s->nb_channels, sizeof(EXRChannel));
- if (!s->channels)
- return AVERROR(ENOMEM);
- channel = &s->channels[s->nb_channels - 1];
- channel->pixel_type = current_pixel_type;
- channel->xsub = xsub;
- channel->ysub = ysub;
- current_channel_offset += 1 << current_pixel_type;
- }
- /* Check if all channels are set with an offset or if the channels
- * are causing an overflow */
- if (FFMIN3(s->channel_offsets[0],
- s->channel_offsets[1],
- s->channel_offsets[2]) < 0) {
- if (s->channel_offsets[0] < 0)
- av_log(avctx, AV_LOG_ERROR, "Missing red channel\n");
- if (s->channel_offsets[1] < 0)
- av_log(avctx, AV_LOG_ERROR, "Missing green channel\n");
- if (s->channel_offsets[2] < 0)
- av_log(avctx, AV_LOG_ERROR, "Missing blue channel\n");
- return AVERROR_INVALIDDATA;
- }
- buf = channel_list_end;
- continue;
- } else if (check_header_variable(avctx, &buf, buf_end, "dataWindow", "box2i", 31, &variable_buffer_data_size) >= 0) {
- if (!variable_buffer_data_size)
- return AVERROR_INVALIDDATA;
- s->xmin = AV_RL32(buf);
- s->ymin = AV_RL32(buf + 4);
- s->xmax = AV_RL32(buf + 8);
- s->ymax = AV_RL32(buf + 12);
- s->xdelta = (s->xmax - s->xmin) + 1;
- s->ydelta = (s->ymax - s->ymin) + 1;
- buf += variable_buffer_data_size;
- continue;
- } else if (check_header_variable(avctx, &buf, buf_end, "displayWindow", "box2i", 34, &variable_buffer_data_size) >= 0) {
- if (!variable_buffer_data_size)
- return AVERROR_INVALIDDATA;
- w = AV_RL32(buf + 8) + 1;
- h = AV_RL32(buf + 12) + 1;
- buf += variable_buffer_data_size;
- continue;
- } else if (check_header_variable(avctx, &buf, buf_end, "lineOrder", "lineOrder", 25, &variable_buffer_data_size) >= 0) {
- if (!variable_buffer_data_size)
- return AVERROR_INVALIDDATA;
- av_log(avctx, AV_LOG_DEBUG, "line order : %d\n", *buf);
- if (*buf > 2) {
- av_log(avctx, AV_LOG_ERROR, "Unknown line order\n");
- return AVERROR_INVALIDDATA;
- }
- buf += variable_buffer_data_size;
- continue;
- } else if (check_header_variable(avctx, &buf, buf_end, "pixelAspectRatio", "float", 31, &variable_buffer_data_size) >= 0) {
- if (!variable_buffer_data_size)
- return AVERROR_INVALIDDATA;
- avctx->sample_aspect_ratio = av_d2q(av_int2float(AV_RL32(buf)), 255);
- buf += variable_buffer_data_size;
- continue;
- } else if (check_header_variable(avctx, &buf, buf_end, "compression", "compression", 29, &variable_buffer_data_size) >= 0) {
- if (!variable_buffer_data_size)
- return AVERROR_INVALIDDATA;
- if (s->compr == -1)
- s->compr = *buf;
- else
- av_log(avctx, AV_LOG_WARNING, "Found more than one compression attribute\n");
- buf += variable_buffer_data_size;
- continue;
- }
- // Check if there is enough bytes for a header
- if (buf_end - buf <= 9) {
- av_log(avctx, AV_LOG_ERROR, "Incomplete header\n");
- return AVERROR_INVALIDDATA;
- }
- // Process unknown variables
- for (i = 0; i < 2; i++) {
- // Skip variable name/type
- while (++buf < buf_end)
- if (buf[0] == 0x0)
- break;
- }
- buf++;
- // Skip variable length
- if (buf_end - buf >= 5) {
- variable_buffer_data_size = get_header_variable_length(&buf, buf_end);
- if (!variable_buffer_data_size) {
- av_log(avctx, AV_LOG_ERROR, "Incomplete header\n");
- return AVERROR_INVALIDDATA;
- }
- buf += variable_buffer_data_size;
- }
- }
- if (s->compr == -1) {
- av_log(avctx, AV_LOG_ERROR, "Missing compression attribute\n");
- return AVERROR_INVALIDDATA;
- }
- if (buf >= buf_end) {
- av_log(avctx, AV_LOG_ERROR, "Incomplete frame\n");
- return AVERROR_INVALIDDATA;
- }
- buf++;
- switch (s->pixel_type) {
- case EXR_FLOAT:
- case EXR_HALF:
- if (s->channel_offsets[3] >= 0)
- avctx->pix_fmt = AV_PIX_FMT_RGBA64;
- else
- avctx->pix_fmt = AV_PIX_FMT_RGB48;
- break;
- case EXR_UINT:
- av_log_missing_feature(avctx, "32-bit unsigned int", 1);
- return AVERROR_PATCHWELCOME;
- default:
- av_log(avctx, AV_LOG_ERROR, "Missing channel list\n");
- return AVERROR_INVALIDDATA;
- }
- switch (s->compr) {
- 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;
- default:
- av_log(avctx, AV_LOG_ERROR, "Compression type %d is not supported\n", s->compr);
- return AVERROR_PATCHWELCOME;
- }
- if (s->picture.data[0])
- ff_thread_release_buffer(avctx, &s->picture);
- if (av_image_check_size(w, h, 0, avctx))
- return AVERROR_INVALIDDATA;
- // Verify the xmin, xmax, ymin, ymax and xdelta before setting the actual image size
- if (s->xmin > s->xmax ||
- s->ymin > s->ymax ||
- s->xdelta != s->xmax - s->xmin + 1 ||
- s->xmax >= w || s->ymax >= h) {
- av_log(avctx, AV_LOG_ERROR, "Wrong sizing or missing size information\n");
- return AVERROR_INVALIDDATA;
- }
- if (w != avctx->width || h != avctx->height) {
- avcodec_set_dimensions(avctx, w, h);
- }
- s->desc = av_pix_fmt_desc_get(avctx->pix_fmt);
- out_line_size = avctx->width * 2 * s->desc->nb_components;
- s->scan_line_size = s->xdelta * current_channel_offset;
- scan_line_blocks = (s->ydelta + s->scan_lines_per_block - 1) / s->scan_lines_per_block;
- if (s->compr != EXR_RAW) {
- size_t thread_data_size, prev_size;
- EXRThreadData *m;
- prev_size = s->thread_data_size;
- if (av_size_mult(avctx->thread_count, sizeof(EXRThreadData), &thread_data_size))
- return AVERROR(EINVAL);
- m = av_fast_realloc(s->thread_data, &s->thread_data_size, thread_data_size);
- if (!m)
- return AVERROR(ENOMEM);
- s->thread_data = m;
- memset(s->thread_data + prev_size, 0, s->thread_data_size - prev_size);
- }
- if ((ret = ff_thread_get_buffer(avctx, p)) < 0) {
- av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
- return ret;
- }
- if (buf_end - buf < scan_line_blocks * 8)
- return AVERROR_INVALIDDATA;
- s->table = buf;
- ptr = p->data[0];
- // Zero out the start if ymin is not 0
- for (y = 0; y < s->ymin; y++) {
- memset(ptr, 0, out_line_size);
- ptr += p->linesize[0];
- }
- avctx->execute2(avctx, decode_block, s->thread_data, NULL, scan_line_blocks);
- // Zero out the end if ymax+1 is not h
- for (y = s->ymax + 1; y < avctx->height; y++) {
- memset(ptr, 0, out_line_size);
- ptr += p->linesize[0];
- }
- *picture = s->picture;
- *got_frame = 1;
- return buf_size;
- }
- static av_cold int decode_init(AVCodecContext *avctx)
- {
- EXRContext *s = avctx->priv_data;
- avcodec_get_frame_defaults(&s->picture);
- avctx->coded_frame = &s->picture;
- return 0;
- }
- static av_cold int decode_end(AVCodecContext *avctx)
- {
- EXRContext *s = avctx->priv_data;
- int i;
- if (s->picture.data[0])
- avctx->release_buffer(avctx, &s->picture);
- for (i = 0; i < s->thread_data_size / sizeof(EXRThreadData); i++) {
- EXRThreadData *td = &s->thread_data[i];
- av_free(td->uncompressed_data);
- av_free(td->tmp);
- }
- av_freep(&s->thread_data);
- s->thread_data_size = 0;
- av_freep(&s->channels);
- return 0;
- }
- AVCodec ff_exr_decoder = {
- .name = "exr",
- .type = AVMEDIA_TYPE_VIDEO,
- .id = AV_CODEC_ID_EXR,
- .priv_data_size = sizeof(EXRContext),
- .init = decode_init,
- .close = decode_end,
- .decode = decode_frame,
- .capabilities = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS | CODEC_CAP_SLICE_THREADS,
- .long_name = NULL_IF_CONFIG_SMALL("OpenEXR image"),
- };