1 /*
2 * Copyright (c) 2017, Alliance for Open Media. All rights reserved
3 *
4 * This source code is subject to the terms of the BSD 2 Clause License and
5 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
6 * was not distributed with this source code in the LICENSE file, you can
7 * obtain it at www.aomedia.org/license/software. If the Alliance for Open
8 * Media Patent License 1.0 was not distributed with this source code in the
9 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
10 */
11
12 // Lightfield Decoder
13 // ==================
14 //
15 // This is an example of a simple lightfield decoder. It builds upon the
16 // simple_decoder.c example. It takes an input file containing the compressed
17 // data (in ivf format), treating it as a lightfield instead of a video.
18 // After running the lightfield encoder, run lightfield decoder to decode a
19 // batch of tiles:
20 // examples/lightfield_decoder vase10x10.ivf vase_reference.yuv 4
21
22 #include <stdio.h>
23 #include <stdlib.h>
24 #include <string.h>
25
26 #include "aom/aom_decoder.h"
27 #include "aom/aomdx.h"
28 #include "aom_scale/yv12config.h"
29 #include "av1/common/enums.h"
30 #include "common/tools_common.h"
31 #include "common/video_reader.h"
32
33 static const char *exec_name;
34
usage_exit(void)35 void usage_exit(void) {
36 fprintf(stderr, "Usage: %s <infile> <outfile> <num_references>\n", exec_name);
37 exit(EXIT_FAILURE);
38 }
39
40 // Tile list entry provided by the application
41 typedef struct {
42 int image_idx;
43 int reference_idx;
44 int tile_col;
45 int tile_row;
46 } TILE_LIST_INFO;
47
48 // M references: 0 - M-1; N images(including references): 0 - N-1;
49 // Note: order the image index incrementally, so that we only go through the
50 // bitstream once to construct the tile list.
51 const int num_tile_lists = 2;
52 const uint16_t tile_count_minus_1 = 9 - 1;
53 const TILE_LIST_INFO tile_list[2][9] = {
54 { { 16, 0, 4, 5 },
55 { 83, 3, 13, 2 },
56 { 57, 2, 2, 6 },
57 { 31, 1, 11, 5 },
58 { 2, 0, 7, 4 },
59 { 77, 3, 9, 9 },
60 { 49, 1, 0, 1 },
61 { 6, 0, 3, 10 },
62 { 63, 2, 5, 8 } },
63 { { 65, 2, 11, 1 },
64 { 42, 1, 3, 7 },
65 { 88, 3, 8, 4 },
66 { 76, 3, 1, 15 },
67 { 1, 0, 2, 2 },
68 { 19, 0, 5, 6 },
69 { 60, 2, 4, 0 },
70 { 25, 1, 11, 15 },
71 { 50, 2, 5, 4 } },
72 };
73
main(int argc,char ** argv)74 int main(int argc, char **argv) {
75 FILE *outfile = NULL;
76 aom_codec_ctx_t codec;
77 AvxVideoReader *reader = NULL;
78 const AvxInterface *decoder = NULL;
79 const AvxVideoInfo *info = NULL;
80 int num_references;
81 aom_image_t reference_images[MAX_EXTERNAL_REFERENCES];
82 size_t frame_size = 0;
83 const unsigned char *frame = NULL;
84 int n, i, j;
85 exec_name = argv[0];
86
87 if (argc != 4) die("Invalid number of arguments.");
88
89 reader = aom_video_reader_open(argv[1]);
90 if (!reader) die("Failed to open %s for reading.", argv[1]);
91
92 if (!(outfile = fopen(argv[2], "wb")))
93 die("Failed to open %s for writing.", argv[2]);
94
95 num_references = (int)strtol(argv[3], NULL, 0);
96
97 info = aom_video_reader_get_info(reader);
98
99 decoder = get_aom_decoder_by_fourcc(info->codec_fourcc);
100 if (!decoder) die("Unknown input codec.");
101 printf("Using %s\n", aom_codec_iface_name(decoder->codec_interface()));
102
103 if (aom_codec_dec_init(&codec, decoder->codec_interface(), NULL, 0))
104 die_codec(&codec, "Failed to initialize decoder.");
105
106 if (aom_codec_control(&codec, AV1D_SET_IS_ANNEXB, info->is_annexb)) {
107 die("Failed to set annex b status");
108 }
109
110 // Decode anchor frames.
111 aom_codec_control_(&codec, AV1_SET_TILE_MODE, 0);
112 for (i = 0; i < num_references; ++i) {
113 aom_video_reader_read_frame(reader);
114 frame = aom_video_reader_get_frame(reader, &frame_size);
115 if (aom_codec_decode(&codec, frame, frame_size, NULL))
116 die_codec(&codec, "Failed to decode frame.");
117
118 if (i == 0) {
119 aom_img_fmt_t ref_fmt = 0;
120 if (aom_codec_control(&codec, AV1D_GET_IMG_FORMAT, &ref_fmt))
121 die_codec(&codec, "Failed to get the image format");
122
123 int frame_res[2];
124 if (aom_codec_control(&codec, AV1D_GET_FRAME_SIZE, frame_res))
125 die_codec(&codec, "Failed to get the image frame size");
126
127 // Allocate memory to store decoded references. Allocate memory with the
128 // border so that it can be used as a reference.
129 for (j = 0; j < num_references; j++) {
130 unsigned int border = AOM_BORDER_IN_PIXELS;
131 if (!aom_img_alloc_with_border(&reference_images[j], ref_fmt,
132 frame_res[0], frame_res[1], 32, 8,
133 border)) {
134 die("Failed to allocate references.");
135 }
136 }
137 }
138
139 if (aom_codec_control(&codec, AV1_COPY_NEW_FRAME_IMAGE,
140 &reference_images[i]))
141 die_codec(&codec, "Failed to copy decoded reference frame");
142
143 aom_codec_iter_t iter = NULL;
144 aom_image_t *img = NULL;
145 while ((img = aom_codec_get_frame(&codec, &iter)) != NULL) {
146 char name[1024];
147 snprintf(name, sizeof(name), "ref_%d.yuv", i);
148 printf("writing ref image to %s, %d, %d\n", name, img->d_w, img->d_h);
149 FILE *ref_file = fopen(name, "wb");
150 aom_img_write(img, ref_file);
151 fclose(ref_file);
152 }
153 }
154
155 FILE *infile = aom_video_reader_get_file(reader);
156 // Record the offset of the first camera image.
157 const FileOffset camera_frame_pos = ftello(infile);
158
159 // Process 1 tile.
160 for (n = 0; n < num_tile_lists; n++) {
161 for (i = 0; i <= tile_count_minus_1; i++) {
162 int image_idx = tile_list[n][i].image_idx;
163 int ref_idx = tile_list[n][i].reference_idx;
164 int tc = tile_list[n][i].tile_col;
165 int tr = tile_list[n][i].tile_row;
166 int frame_cnt = -1;
167
168 // Seek to the first camera image.
169 fseeko(infile, camera_frame_pos, SEEK_SET);
170
171 // Read out the camera image
172 while (frame_cnt != image_idx) {
173 aom_video_reader_read_frame(reader);
174 frame_cnt++;
175 }
176
177 frame = aom_video_reader_get_frame(reader, &frame_size);
178
179 aom_codec_control_(&codec, AV1_SET_TILE_MODE, 1);
180 aom_codec_control_(&codec, AV1D_EXT_TILE_DEBUG, 1);
181 aom_codec_control_(&codec, AV1_SET_DECODE_TILE_ROW, tr);
182 aom_codec_control_(&codec, AV1_SET_DECODE_TILE_COL, tc);
183
184 av1_ref_frame_t ref;
185 ref.idx = 0;
186 ref.use_external_ref = 1;
187 ref.img = reference_images[ref_idx];
188 if (aom_codec_control(&codec, AV1_SET_REFERENCE, &ref)) {
189 die_codec(&codec, "Failed to set reference frame.");
190 }
191
192 aom_codec_err_t aom_status =
193 aom_codec_decode(&codec, frame, frame_size, NULL);
194 if (aom_status) die_codec(&codec, "Failed to decode tile.");
195
196 aom_codec_iter_t iter = NULL;
197 aom_image_t *img = aom_codec_get_frame(&codec, &iter);
198 aom_img_write(img, outfile);
199 }
200 }
201
202 for (i = 0; i < num_references; i++) aom_img_free(&reference_images[i]);
203 if (aom_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec");
204 aom_video_reader_close(reader);
205 fclose(outfile);
206
207 return EXIT_SUCCESS;
208 }
209