1282 lines
38 KiB
C
1282 lines
38 KiB
C
/*
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* OpenEXR (.exr) image decoder
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* Copyright (c) 2009 Jimmy Christensen
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* OpenEXR decoder
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* @author Jimmy Christensen
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*
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* For more information on the OpenEXR format, visit:
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* http://openexr.com/
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*
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* exr_flt2uint() and exr_halflt2uint() is credited to Reimar Döffinger
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*/
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#include <zlib.h>
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#include "get_bits.h"
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#include "avcodec.h"
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#include "bytestream.h"
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#include "mathops.h"
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#include "thread.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/avassert.h"
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enum ExrCompr {
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EXR_RAW = 0,
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EXR_RLE = 1,
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EXR_ZIP1 = 2,
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EXR_ZIP16 = 3,
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EXR_PIZ = 4,
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EXR_PXR24 = 5,
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EXR_B44 = 6,
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EXR_B44A = 7,
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};
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enum ExrPixelType {
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EXR_UINT,
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EXR_HALF,
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EXR_FLOAT
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};
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typedef struct EXRChannel {
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int xsub, ysub;
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enum ExrPixelType pixel_type;
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} EXRChannel;
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typedef struct EXRThreadData {
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uint8_t *uncompressed_data;
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int uncompressed_size;
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uint8_t *tmp;
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int tmp_size;
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uint8_t *bitmap;
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uint16_t *lut;
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} EXRThreadData;
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typedef struct EXRContext {
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AVFrame *picture;
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int compr;
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enum ExrPixelType pixel_type;
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int channel_offsets[4]; // 0 = red, 1 = green, 2 = blue and 3 = alpha
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const AVPixFmtDescriptor *desc;
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uint32_t xmax, xmin;
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uint32_t ymax, ymin;
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uint32_t xdelta, ydelta;
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int ysize;
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uint64_t scan_line_size;
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int scan_lines_per_block;
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const uint8_t *buf, *table;
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int buf_size;
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EXRChannel *channels;
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int nb_channels;
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EXRThreadData *thread_data;
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int thread_data_size;
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} EXRContext;
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/**
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* Converts from 32-bit float as uint32_t to uint16_t
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*
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* @param v 32-bit float
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* @return normalized 16-bit unsigned int
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*/
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static inline uint16_t exr_flt2uint(uint32_t v)
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{
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unsigned int exp = v >> 23;
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// "HACK": negative values result in exp< 0, so clipping them to 0
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// is also handled by this condition, avoids explicit check for sign bit.
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if (exp<= 127 + 7 - 24) // we would shift out all bits anyway
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return 0;
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if (exp >= 127)
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return 0xffff;
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v &= 0x007fffff;
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return (v + (1 << 23)) >> (127 + 7 - exp);
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}
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/**
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* Converts from 16-bit float as uint16_t to uint16_t
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*
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* @param v 16-bit float
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* @return normalized 16-bit unsigned int
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*/
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static inline uint16_t exr_halflt2uint(uint16_t v)
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{
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unsigned exp = 14 - (v >> 10);
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if (exp >= 14) {
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if (exp == 14) return (v >> 9) & 1;
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else return (v & 0x8000) ? 0 : 0xffff;
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}
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v <<= 6;
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return (v + (1 << 16)) >> (exp + 1);
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}
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/**
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* Gets the size of the header variable
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*
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* @param **buf the current pointer location in the header where
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* the variable data starts
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* @param *buf_end pointer location of the end of the buffer
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* @return size of variable data
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*/
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static unsigned int get_header_variable_length(const uint8_t **buf,
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const uint8_t *buf_end)
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{
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unsigned int variable_buffer_data_size = bytestream_get_le32(buf);
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if (variable_buffer_data_size >= buf_end - *buf)
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return 0;
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return variable_buffer_data_size;
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}
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/**
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* Checks if the variable name corresponds with it's data type
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*
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* @param *avctx the AVCodecContext
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* @param **buf the current pointer location in the header where
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* the variable name starts
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* @param *buf_end pointer location of the end of the buffer
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* @param *value_name name of the varible to check
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* @param *value_type type of the varible to check
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* @param minimum_length minimum length of the variable data
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* @param variable_buffer_data_size variable length read from the header
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* after it's checked
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* @return negative if variable is invalid
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*/
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static int check_header_variable(AVCodecContext *avctx,
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const uint8_t **buf,
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const uint8_t *buf_end,
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const char *value_name,
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const char *value_type,
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unsigned int minimum_length,
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unsigned int *variable_buffer_data_size)
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{
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if (buf_end - *buf >= minimum_length && !strcmp(*buf, value_name)) {
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*buf += strlen(value_name)+1;
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if (!strcmp(*buf, value_type)) {
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*buf += strlen(value_type)+1;
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*variable_buffer_data_size = get_header_variable_length(buf, buf_end);
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if (!*variable_buffer_data_size)
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av_log(avctx, AV_LOG_ERROR, "Incomplete header\n");
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return 1;
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}
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*buf -= strlen(value_name)+1;
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av_log(avctx, AV_LOG_WARNING, "Unknown data type for header variable %s\n", value_name);
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}
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return -1;
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}
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static void predictor(uint8_t *src, int size)
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{
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uint8_t *t = src + 1;
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uint8_t *stop = src + size;
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while (t < stop) {
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int d = (int)t[-1] + (int)t[0] - 128;
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t[0] = d;
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++t;
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}
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}
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static void reorder_pixels(uint8_t *src, uint8_t *dst, int size)
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{
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const int8_t *t1 = src;
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const int8_t *t2 = src + (size + 1) / 2;
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int8_t *s = dst;
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int8_t *stop = s + size;
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while (1) {
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if (s < stop)
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*(s++) = *(t1++);
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else
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break;
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if (s < stop)
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*(s++) = *(t2++);
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else
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break;
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}
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}
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static int zip_uncompress(const uint8_t *src, int compressed_size,
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int uncompressed_size, EXRThreadData *td)
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{
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unsigned long dest_len = uncompressed_size;
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if (uncompress(td->tmp, &dest_len, src, compressed_size) != Z_OK ||
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dest_len != uncompressed_size)
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return AVERROR(EINVAL);
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predictor(td->tmp, uncompressed_size);
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reorder_pixels(td->tmp, td->uncompressed_data, uncompressed_size);
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return 0;
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}
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static int rle_uncompress(const uint8_t *src, int compressed_size,
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int uncompressed_size, EXRThreadData *td)
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{
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int8_t *d = (int8_t *)td->tmp;
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const int8_t *s = (const int8_t *)src;
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int ssize = compressed_size;
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int dsize = uncompressed_size;
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int8_t *dend = d + dsize;
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int count;
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while (ssize > 0) {
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count = *s++;
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if (count < 0) {
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count = -count;
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if ((dsize -= count ) < 0 ||
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(ssize -= count + 1) < 0)
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return -1;
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while (count--)
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*d++ = *s++;
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} else {
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count++;
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if ((dsize -= count) < 0 ||
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(ssize -= 2 ) < 0)
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return -1;
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while (count--)
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*d++ = *s;
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s++;
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}
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}
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if (dend != d)
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return AVERROR_INVALIDDATA;
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predictor(td->tmp, uncompressed_size);
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reorder_pixels(td->tmp, td->uncompressed_data, uncompressed_size);
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return 0;
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}
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#define USHORT_RANGE (1 << 16)
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#define BITMAP_SIZE (1 << 13)
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static uint16_t reverse_lut(const uint8_t *bitmap, uint16_t *lut)
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{
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int i, k = 0;
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for (i = 0; i < USHORT_RANGE; i++) {
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if ((i == 0) || (bitmap[i >> 3] & (1 << (i & 7))))
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lut[k++] = i;
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}
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i = k - 1;
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memset(lut + k, 0, (USHORT_RANGE - k) * 2);
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return i;
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}
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static void apply_lut(const uint16_t *lut, uint16_t *dst, int dsize)
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{
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int i;
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for (i = 0; i < dsize; ++i)
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dst[i] = lut[dst[i]];
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}
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#define HUF_ENCBITS 16 // literal (value) bit length
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#define HUF_DECBITS 14 // decoding bit size (>= 8)
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#define HUF_ENCSIZE ((1 << HUF_ENCBITS) + 1) // encoding table size
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#define HUF_DECSIZE (1 << HUF_DECBITS) // decoding table size
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#define HUF_DECMASK (HUF_DECSIZE - 1)
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typedef struct HufDec {
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int len;
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int lit;
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int *p;
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} HufDec;
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static void huf_canonical_code_table(uint64_t *hcode)
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{
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uint64_t c, n[59] = { 0 };
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int i;
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for (i = 0; i < HUF_ENCSIZE; ++i)
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n[hcode[i]] += 1;
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c = 0;
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for (i = 58; i > 0; --i) {
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uint64_t nc = ((c + n[i]) >> 1);
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n[i] = c;
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c = nc;
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}
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for (i = 0; i < HUF_ENCSIZE; ++i) {
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int l = hcode[i];
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if (l > 0)
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hcode[i] = l | (n[l]++ << 6);
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}
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}
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#define SHORT_ZEROCODE_RUN 59
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#define LONG_ZEROCODE_RUN 63
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#define SHORTEST_LONG_RUN (2 + LONG_ZEROCODE_RUN - SHORT_ZEROCODE_RUN)
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#define LONGEST_LONG_RUN (255 + SHORTEST_LONG_RUN)
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static int huf_unpack_enc_table(GetByteContext *gb,
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int32_t im, int32_t iM, uint64_t *hcode)
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{
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GetBitContext gbit;
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init_get_bits8(&gbit, gb->buffer, bytestream2_get_bytes_left(gb));
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for (; im <= iM; im++) {
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uint64_t l = hcode[im] = get_bits(&gbit, 6);
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if (l == LONG_ZEROCODE_RUN) {
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int zerun = get_bits(&gbit, 8) + SHORTEST_LONG_RUN;
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if (im + zerun > iM + 1)
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return AVERROR_INVALIDDATA;
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while (zerun--)
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hcode[im++] = 0;
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im--;
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} else if (l >= (uint64_t) SHORT_ZEROCODE_RUN) {
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int zerun = l - SHORT_ZEROCODE_RUN + 2;
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if (im + zerun > iM + 1)
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return AVERROR_INVALIDDATA;
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while (zerun--)
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hcode[im++] = 0;
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im--;
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}
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}
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bytestream2_skip(gb, (get_bits_count(&gbit) + 7) / 8);
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huf_canonical_code_table(hcode);
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return 0;
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}
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static int huf_build_dec_table(const uint64_t *hcode, int im,
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int iM, HufDec *hdecod)
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{
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for (; im <= iM; im++) {
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uint64_t c = hcode[im] >> 6;
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int i, l = hcode[im] & 63;
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if (c >> l)
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return AVERROR_INVALIDDATA;
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if (l > HUF_DECBITS) {
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HufDec *pl = hdecod + (c >> (l - HUF_DECBITS));
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if (pl->len)
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return AVERROR_INVALIDDATA;
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pl->lit++;
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pl->p = av_realloc_f(pl->p, pl->lit, sizeof(int));
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if (!pl->p)
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return AVERROR(ENOMEM);
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pl->p[pl->lit - 1] = im;
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} else if (l) {
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HufDec *pl = hdecod + (c << (HUF_DECBITS - l));
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for (i = 1 << (HUF_DECBITS - l); i > 0; i--, pl++) {
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if (pl->len || pl->p)
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return AVERROR_INVALIDDATA;
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pl->len = l;
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pl->lit = im;
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}
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}
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}
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return 0;
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}
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#define get_char(c, lc, gb) { \
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c = (c << 8) | bytestream2_get_byte(gb); \
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lc += 8; \
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}
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#define get_code(po, rlc, c, lc, gb, out, oe) { \
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if (po == rlc) { \
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if (lc < 8) \
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get_char(c, lc, gb); \
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lc -= 8; \
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\
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cs = c >> lc; \
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\
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if (out + cs > oe) \
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return AVERROR_INVALIDDATA; \
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\
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s = out[-1]; \
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\
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while (cs-- > 0) \
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*out++ = s; \
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} else if (out < oe) { \
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*out++ = po; \
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} else { \
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return AVERROR_INVALIDDATA; \
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} \
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}
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static int huf_decode(const uint64_t *hcode, const HufDec *hdecod,
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GetByteContext *gb, int nbits,
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int rlc, int no, uint16_t *out)
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{
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uint64_t c = 0;
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uint16_t *outb = out;
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uint16_t *oe = out + no;
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const uint8_t *ie = gb->buffer + (nbits + 7) / 8; // input byte size
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uint8_t cs, s;
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int i, lc = 0;
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while (gb->buffer < ie) {
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get_char(c, lc, gb);
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while (lc >= HUF_DECBITS) {
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const HufDec pl = hdecod[(c >> (lc-HUF_DECBITS)) & HUF_DECMASK];
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if (pl.len) {
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lc -= pl.len;
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get_code(pl.lit, rlc, c, lc, gb, out, oe);
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} else {
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int j;
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if (!pl.p)
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return AVERROR_INVALIDDATA;
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for (j = 0; j < pl.lit; j++) {
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int l = hcode[pl.p[j]] & 63;
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while (lc < l && bytestream2_get_bytes_left(gb) > 0)
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get_char(c, lc, gb);
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|
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if (lc >= l) {
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if ((hcode[pl.p[j]] >> 6) ==
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((c >> (lc - l)) & ((1LL << l) - 1))) {
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lc -= l;
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get_code(pl.p[j], rlc, c, lc, gb, out, oe);
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break;
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}
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}
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}
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if (j == pl.lit)
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return AVERROR_INVALIDDATA;
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}
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}
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}
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i = (8 - nbits) & 7;
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c >>= i;
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lc -= i;
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while (lc > 0) {
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const HufDec pl = hdecod[(c << (HUF_DECBITS - lc)) & HUF_DECMASK];
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if (pl.len) {
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lc -= pl.len;
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get_code(pl.lit, rlc, c, lc, gb, out, oe);
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} else {
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return AVERROR_INVALIDDATA;
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}
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}
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if (out - outb != no)
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return AVERROR_INVALIDDATA;
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return 0;
|
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}
|
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|
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static int huf_uncompress(GetByteContext *gb,
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uint16_t *dst, int dst_size)
|
|
{
|
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int32_t src_size, im, iM;
|
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uint32_t nBits;
|
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uint64_t *freq;
|
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HufDec *hdec;
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int ret, i;
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src_size = bytestream2_get_le32(gb);
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im = bytestream2_get_le32(gb);
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iM = bytestream2_get_le32(gb);
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bytestream2_skip(gb, 4);
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nBits = bytestream2_get_le32(gb);
|
|
if (im < 0 || im >= HUF_ENCSIZE ||
|
|
iM < 0 || iM >= HUF_ENCSIZE ||
|
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src_size < 0)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
bytestream2_skip(gb, 4);
|
|
|
|
freq = av_calloc(HUF_ENCSIZE, sizeof(*freq));
|
|
hdec = av_calloc(HUF_DECSIZE, sizeof(*hdec));
|
|
if (!freq || !hdec) {
|
|
ret = AVERROR(ENOMEM);
|
|
goto fail;
|
|
}
|
|
|
|
if ((ret = huf_unpack_enc_table(gb, im, iM, freq)) < 0)
|
|
goto fail;
|
|
|
|
if (nBits > 8 * bytestream2_get_bytes_left(gb)) {
|
|
ret = AVERROR_INVALIDDATA;
|
|
goto fail;
|
|
}
|
|
|
|
if ((ret = huf_build_dec_table(freq, im, iM, hdec)) < 0)
|
|
goto fail;
|
|
ret = huf_decode(freq, hdec, gb, nBits, iM, dst_size, dst);
|
|
|
|
fail:
|
|
for (i = 0; i < HUF_DECSIZE; i++) {
|
|
if (hdec)
|
|
av_freep(&hdec[i].p);
|
|
}
|
|
|
|
av_free(freq);
|
|
av_free(hdec);
|
|
|
|
return ret;
|
|
}
|
|
|
|
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, *tmp = (uint16_t *)td->tmp;
|
|
int8_t *out;
|
|
int ret, i, j;
|
|
|
|
if (!td->bitmap)
|
|
td->bitmap = av_malloc(BITMAP_SIZE);
|
|
if (!td->lut)
|
|
td->lut = av_malloc(1 << 17);
|
|
if (!td->bitmap || !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, 0, BITMAP_SIZE - max_non_zero);
|
|
|
|
maxval = reverse_lut(td->bitmap, td->lut);
|
|
|
|
ret = huf_uncompress(&gb, tmp, dsize / sizeof(int16_t));
|
|
if (ret)
|
|
return ret;
|
|
|
|
ptr = tmp;
|
|
for (i = 0; i < s->nb_channels; i++) {
|
|
EXRChannel *channel = &s->channels[i];
|
|
int size = channel->pixel_type;
|
|
|
|
for (j = 0; j < size; j++)
|
|
wav_decode(ptr + j, s->xdelta, size, s->ysize, s->xdelta * size, maxval);
|
|
ptr += s->xdelta * s->ysize * size;
|
|
}
|
|
|
|
apply_lut(td->lut, tmp, dsize / sizeof(int16_t));
|
|
|
|
out = td->uncompressed_data;
|
|
for (i = 0; i < s->ysize; i++) {
|
|
for (j = 0; j < s->nb_channels; j++) {
|
|
uint16_t *in = tmp + j * s->xdelta * s->ysize + i * s->xdelta;
|
|
memcpy(out, in, s->xdelta * 2);
|
|
out += s->xdelta * 2;
|
|
}
|
|
}
|
|
|
|
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 i, x, buf_size = s->buf_size;
|
|
int av_unused ret;
|
|
|
|
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_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(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;
|
|
ThreadFrame frame = { .f = data };
|
|
AVFrame *picture = data;
|
|
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) {
|
|
avpriv_report_missing_feature(avctx, "Version %d", version);
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
|
|
flags = bytestream_get_le24(&buf);
|
|
if (flags & 0x2) {
|
|
avpriv_report_missing_feature(avctx, "Tile support");
|
|
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;
|
|
enum ExrPixelType current_pixel_type;
|
|
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) {
|
|
avpriv_report_missing_feature(avctx, "Subsampling %dx%d", 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:
|
|
avpriv_request_sample(avctx, "32-bit unsigned int");
|
|
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;
|
|
case EXR_PIZ:
|
|
s->scan_lines_per_block = 32;
|
|
break;
|
|
default:
|
|
avpriv_report_missing_feature(avctx, "Compression %d", s->compr);
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
|
|
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, &frame, 0)) < 0)
|
|
return ret;
|
|
|
|
if (buf_end - buf < scan_line_blocks * 8)
|
|
return AVERROR_INVALIDDATA;
|
|
s->table = buf;
|
|
ptr = picture->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 += picture->linesize[0];
|
|
}
|
|
|
|
s->picture = picture;
|
|
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 += picture->linesize[0];
|
|
}
|
|
|
|
picture->pict_type = AV_PICTURE_TYPE_I;
|
|
*got_frame = 1;
|
|
|
|
return buf_size;
|
|
}
|
|
|
|
static av_cold int decode_end(AVCodecContext *avctx)
|
|
{
|
|
EXRContext *s = avctx->priv_data;
|
|
int i;
|
|
|
|
for (i = 0; i < s->thread_data_size / sizeof(EXRThreadData); 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(&s->thread_data);
|
|
s->thread_data_size = 0;
|
|
av_freep(&s->channels);
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVCodec ff_exr_decoder = {
|
|
.name = "exr",
|
|
.long_name = NULL_IF_CONFIG_SMALL("OpenEXR image"),
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_EXR,
|
|
.priv_data_size = sizeof(EXRContext),
|
|
.close = decode_end,
|
|
.decode = decode_frame,
|
|
.capabilities = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS | CODEC_CAP_SLICE_THREADS,
|
|
};
|