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Diffstat (limited to 'libavcodec/exr.c')
| -rw-r--r-- | libavcodec/exr.c | 814 |
1 files changed, 814 insertions, 0 deletions
diff --git a/libavcodec/exr.c b/libavcodec/exr.c new file mode 100644 index 0000000..cba0c4d --- /dev/null +++ b/libavcodec/exr.c @@ -0,0 +1,814 @@ +/* + * 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 Döffinger + */ + +#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 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_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) { + 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: + 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; + default: + av_log(avctx, AV_LOG_ERROR, "Compression type %d is not supported\n", 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_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), + .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"), +}; |
