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