зеркало из https://github.com/mozilla/gecko-dev.git
226 строки
7.3 KiB
C
226 строки
7.3 KiB
C
/*
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* Copyright (c) 2017, Alliance for Open Media. All rights reserved
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*
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* This source code is subject to the terms of the BSD 2 Clause License and
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* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
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* was not distributed with this source code in the LICENSE file, you can
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* obtain it at www.aomedia.org/license/software. If the Alliance for Open
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* Media Patent License 1.0 was not distributed with this source code in the
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* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
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*/
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// Lightfield Decoder
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// ==================
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//
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// This is an example of a simple lightfield decoder. It builds upon the
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// simple_decoder.c example. It takes an input file containing the compressed
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// data (in ivf format), treating it as a lightfield instead of a video and
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// will decode a single lightfield tile. The lf_width and lf_height arguments
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// are the number of lightfield images in each dimension. The tile to decode
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// is specified by the tile_u, tile_v, tile_s, tile_t arguments. The tile_u,
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// tile_v specify the image and tile_s, tile_t specify the tile in the image.
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// After running the lightfield encoder, run lightfield decoder to decode a
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// single tile:
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// examples/lightfield_decoder vase10x10.ivf vase_reference.yuv 10 10 5
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "aom/aom_decoder.h"
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#include "aom/aomdx.h"
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#include "common/tools_common.h"
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#include "common/video_reader.h"
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#define MAX_EXTERNAL_REFERENCES 128
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#define AOM_BORDER_IN_PIXELS 288
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static const char *exec_name;
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void usage_exit(void) {
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fprintf(
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stderr,
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"Usage: %s <infile> <outfile> <lf_width> <lf_height> <lf_blocksize>\n",
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exec_name);
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exit(EXIT_FAILURE);
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}
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// Tile list entry provided by the application
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typedef struct {
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int image_idx;
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int reference_idx;
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int tile_col;
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int tile_row;
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} TILE_LIST_INFO;
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// M references: 0 - M-1; N images(including references): 0 - N-1;
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// Note: order the image index incrementally, so that we only go through the
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// bitstream once to construct the tile list.
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const int num_tile_lists = 2;
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const uint16_t tile_count_minus_1 = 9 - 1;
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const TILE_LIST_INFO tile_list[2][9] = {
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{ { 16, 0, 4, 5 },
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{ 83, 3, 13, 2 },
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{ 57, 2, 2, 6 },
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{ 31, 1, 11, 5 },
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{ 2, 0, 7, 4 },
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{ 77, 3, 9, 9 },
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{ 49, 1, 0, 1 },
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{ 6, 0, 3, 10 },
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{ 63, 2, 5, 8 } },
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{ { 65, 2, 11, 1 },
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{ 42, 1, 3, 7 },
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{ 88, 3, 8, 4 },
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{ 76, 3, 1, 15 },
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{ 1, 0, 2, 2 },
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{ 19, 0, 5, 6 },
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{ 60, 2, 4, 0 },
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{ 25, 1, 11, 15 },
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{ 50, 2, 5, 4 } },
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};
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int main(int argc, char **argv) {
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FILE *outfile = NULL;
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aom_codec_ctx_t codec;
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AvxVideoReader *reader = NULL;
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const AvxInterface *decoder = NULL;
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const AvxVideoInfo *info = NULL;
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const char *lf_width_arg;
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const char *lf_height_arg;
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const char *lf_blocksize_arg;
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int width, height;
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int lf_width, lf_height;
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int lf_blocksize;
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int u_blocks;
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int v_blocks;
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aom_image_t reference_images[MAX_EXTERNAL_REFERENCES];
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size_t frame_size = 0;
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const unsigned char *frame = NULL;
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int n, i;
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exec_name = argv[0];
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if (argc != 6) die("Invalid number of arguments.");
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reader = aom_video_reader_open(argv[1]);
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if (!reader) die("Failed to open %s for reading.", argv[1]);
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if (!(outfile = fopen(argv[2], "wb")))
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die("Failed to open %s for writing.", argv[2]);
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lf_width_arg = argv[3];
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lf_height_arg = argv[4];
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lf_blocksize_arg = argv[5];
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lf_width = (int)strtol(lf_width_arg, NULL, 0);
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lf_height = (int)strtol(lf_height_arg, NULL, 0);
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lf_blocksize = (int)strtol(lf_blocksize_arg, NULL, 0);
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info = aom_video_reader_get_info(reader);
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width = info->frame_width;
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height = info->frame_height;
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decoder = get_aom_decoder_by_fourcc(info->codec_fourcc);
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if (!decoder) die("Unknown input codec.");
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printf("Using %s\n", aom_codec_iface_name(decoder->codec_interface()));
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if (aom_codec_dec_init(&codec, decoder->codec_interface(), NULL, 0))
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die_codec(&codec, "Failed to initialize decoder.");
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// How many anchor frames we have.
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u_blocks = (lf_width + lf_blocksize - 1) / lf_blocksize;
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v_blocks = (lf_height + lf_blocksize - 1) / lf_blocksize;
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int num_references = v_blocks * u_blocks;
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// Allocate memory to store decoded references.
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aom_img_fmt_t ref_fmt = AOM_IMG_FMT_I420;
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if (!CONFIG_LOWBITDEPTH) ref_fmt |= AOM_IMG_FMT_HIGHBITDEPTH;
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// Allocate memory with the border so that it can be used as a reference.
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for (i = 0; i < num_references; i++) {
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unsigned int border = AOM_BORDER_IN_PIXELS;
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if (!aom_img_alloc_with_border(&reference_images[i], ref_fmt, width, height,
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32, 8, border)) {
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die("Failed to allocate references.");
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}
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}
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// Decode anchor frames.
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aom_codec_control_(&codec, AV1_SET_TILE_MODE, 0);
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for (i = 0; i < num_references; ++i) {
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aom_video_reader_read_frame(reader);
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frame = aom_video_reader_get_frame(reader, &frame_size);
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if (aom_codec_decode(&codec, frame, frame_size, NULL))
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die_codec(&codec, "Failed to decode frame.");
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if (aom_codec_control(&codec, AV1_COPY_NEW_FRAME_IMAGE,
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&reference_images[i]))
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die_codec(&codec, "Failed to copy decoded reference frame");
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aom_codec_iter_t iter = NULL;
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aom_image_t *img = NULL;
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while ((img = aom_codec_get_frame(&codec, &iter)) != NULL) {
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char name[1024];
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snprintf(name, sizeof(name), "ref_%d.yuv", i);
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printf("writing ref image to %s, %d, %d\n", name, img->d_w, img->d_h);
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FILE *ref_file = fopen(name, "wb");
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aom_img_write(img, ref_file);
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fclose(ref_file);
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}
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}
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FILE *infile = aom_video_reader_get_file(reader);
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// Record the offset of the first camera image.
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const FileOffset camera_frame_pos = ftello(infile);
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// Process 1 tile.
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for (n = 0; n < num_tile_lists; n++) {
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for (i = 0; i <= tile_count_minus_1; i++) {
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int image_idx = tile_list[n][i].image_idx;
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int ref_idx = tile_list[n][i].reference_idx;
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int tc = tile_list[n][i].tile_col;
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int tr = tile_list[n][i].tile_row;
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int frame_cnt = -1;
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// Seek to the first camera image.
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fseeko(infile, camera_frame_pos, SEEK_SET);
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// Read out the camera image
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while (frame_cnt != image_idx) {
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aom_video_reader_read_frame(reader);
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frame_cnt++;
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}
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frame = aom_video_reader_get_frame(reader, &frame_size);
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aom_codec_control_(&codec, AV1_SET_TILE_MODE, 1);
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aom_codec_control_(&codec, AV1D_EXT_TILE_DEBUG, 1);
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aom_codec_control_(&codec, AV1_SET_DECODE_TILE_ROW, tr);
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aom_codec_control_(&codec, AV1_SET_DECODE_TILE_COL, tc);
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av1_ref_frame_t ref;
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ref.idx = 0;
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ref.use_external_ref = 1;
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ref.img = reference_images[ref_idx];
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if (aom_codec_control(&codec, AV1_SET_REFERENCE, &ref)) {
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die_codec(&codec, "Failed to set reference frame.");
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}
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aom_codec_err_t aom_status =
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aom_codec_decode(&codec, frame, frame_size, NULL);
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if (aom_status) die_codec(&codec, "Failed to decode tile.");
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aom_codec_iter_t iter = NULL;
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aom_image_t *img = aom_codec_get_frame(&codec, &iter);
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aom_img_write(img, outfile);
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}
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}
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for (i = 0; i < num_references; i++) aom_img_free(&reference_images[i]);
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if (aom_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec");
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aom_video_reader_close(reader);
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fclose(outfile);
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return EXIT_SUCCESS;
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}
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