1 /*
2 * Copyright (c) 2018, 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 Tile List Decoder
13 // ============================
14 //
15 // This is a lightfield tile list decoder example. It takes an input file that
16 // contains the anchor frames that are references of the coded tiles, the camera
17 // frame header, and tile list OBUs that include the tile information and the
18 // compressed tile data. This input file is reconstructed from the encoded
19 // lightfield ivf file, and is decodable by AV1 decoder. num_references is
20 // the number of anchor frames coded at the beginning of the light field file.
21 // num_tile_lists is the number of tile lists need to be decoded. There is an
22 // optional parameter allowing to choose the output format, and the supported
23 // formats are YUV1D(default), YUV, and NV12.
24 // Run lightfield tile list decoder to decode an AV1 tile list file:
25 // examples/lightfield_tile_list_decoder vase_tile_list.ivf vase_tile_list.yuv
26 // 4 2 0(optional)
27
28 #include <stdio.h>
29 #include <stdlib.h>
30 #include <string.h>
31 #include <assert.h>
32
33 #include "aom/aom_decoder.h"
34 #include "aom/aomdx.h"
35 #include "aom_scale/yv12config.h"
36 #include "av1/common/enums.h"
37 #include "common/tools_common.h"
38 #include "common/video_reader.h"
39
40 static const char *exec_name;
41
usage_exit(void)42 void usage_exit(void) {
43 fprintf(stderr,
44 "Usage: %s <infile> <outfile> <num_references> <num_tile_lists> "
45 "<output format(optional)>\n",
46 exec_name);
47 exit(EXIT_FAILURE);
48 }
49
write_tile_yuv1d(aom_codec_ctx_t * codec,const aom_image_t * img,FILE * file)50 static void write_tile_yuv1d(aom_codec_ctx_t *codec, const aom_image_t *img,
51 FILE *file) {
52 // read out the tile size.
53 unsigned int tile_size = 0;
54 if (AOM_CODEC_CONTROL_TYPECHECKED(codec, AV1D_GET_TILE_SIZE, &tile_size))
55 die_codec(codec, "Failed to get the tile size");
56 const unsigned int tile_width = tile_size >> 16;
57 const unsigned int tile_height = tile_size & 65535;
58 const uint32_t output_frame_width_in_tiles = img->d_w / tile_width;
59
60 unsigned int tile_count = 0;
61 if (AOM_CODEC_CONTROL_TYPECHECKED(codec, AV1D_GET_TILE_COUNT, &tile_count))
62 die_codec(codec, "Failed to get the tile size");
63
64 // Write tile to file.
65 const int shift = (img->fmt & AOM_IMG_FMT_HIGHBITDEPTH) ? 1 : 0;
66 unsigned int tile_idx;
67
68 for (tile_idx = 0; tile_idx < tile_count; ++tile_idx) {
69 const int row_offset =
70 (tile_idx / output_frame_width_in_tiles) * tile_height;
71 const int col_offset =
72 (tile_idx % output_frame_width_in_tiles) * tile_width;
73 int plane;
74
75 for (plane = 0; plane < 3; ++plane) {
76 const unsigned char *buf = img->planes[plane];
77 const int stride = img->stride[plane];
78 const int roffset =
79 (plane > 0) ? row_offset >> img->y_chroma_shift : row_offset;
80 const int coffset =
81 (plane > 0) ? col_offset >> img->x_chroma_shift : col_offset;
82 const int w = (plane > 0) ? ((tile_width >> img->x_chroma_shift) << shift)
83 : (tile_width << shift);
84 const int h =
85 (plane > 0) ? (tile_height >> img->y_chroma_shift) : tile_height;
86 int y;
87
88 // col offset needs to be adjusted for HBD.
89 buf += roffset * stride + (coffset << shift);
90
91 for (y = 0; y < h; ++y) {
92 fwrite(buf, 1, w, file);
93 buf += stride;
94 }
95 }
96 }
97 }
98
main(int argc,char ** argv)99 int main(int argc, char **argv) {
100 FILE *outfile = NULL;
101 aom_codec_ctx_t codec;
102 AvxVideoReader *reader = NULL;
103 const AvxInterface *decoder = NULL;
104 const AvxVideoInfo *info = NULL;
105 int num_references;
106 int num_tile_lists;
107 aom_image_t reference_images[MAX_EXTERNAL_REFERENCES];
108 size_t frame_size = 0;
109 const unsigned char *frame = NULL;
110 int output_format = YUV1D;
111 int i, j, n;
112
113 exec_name = argv[0];
114
115 if (argc < 5) die("Invalid number of arguments.");
116
117 reader = aom_video_reader_open(argv[1]);
118 if (!reader) die("Failed to open %s for reading.", argv[1]);
119
120 if (!(outfile = fopen(argv[2], "wb")))
121 die("Failed to open %s for writing.", argv[2]);
122
123 num_references = (int)strtol(argv[3], NULL, 0);
124 num_tile_lists = (int)strtol(argv[4], NULL, 0);
125
126 if (argc > 5) output_format = (int)strtol(argv[5], NULL, 0);
127 if (output_format < YUV1D || output_format > NV12)
128 die("Output format out of range [0, 2]");
129
130 info = aom_video_reader_get_info(reader);
131
132 decoder = get_aom_decoder_by_fourcc(info->codec_fourcc);
133 if (!decoder) die("Unknown input codec.");
134 printf("Using %s\n", aom_codec_iface_name(decoder->codec_interface()));
135
136 if (aom_codec_dec_init(&codec, decoder->codec_interface(), NULL, 0))
137 die_codec(&codec, "Failed to initialize decoder.");
138
139 if (AOM_CODEC_CONTROL_TYPECHECKED(&codec, AV1D_SET_IS_ANNEXB,
140 info->is_annexb)) {
141 die("Failed to set annex b status");
142 }
143
144 // Decode anchor frames.
145 AOM_CODEC_CONTROL_TYPECHECKED(&codec, AV1_SET_TILE_MODE, 0);
146 for (i = 0; i < num_references; ++i) {
147 aom_video_reader_read_frame(reader);
148 frame = aom_video_reader_get_frame(reader, &frame_size);
149 if (aom_codec_decode(&codec, frame, frame_size, NULL))
150 die_codec(&codec, "Failed to decode frame.");
151
152 if (i == 0) {
153 aom_img_fmt_t ref_fmt = 0;
154 if (AOM_CODEC_CONTROL_TYPECHECKED(&codec, AV1D_GET_IMG_FORMAT, &ref_fmt))
155 die_codec(&codec, "Failed to get the image format");
156
157 int frame_res[2];
158 if (AOM_CODEC_CONTROL_TYPECHECKED(&codec, AV1D_GET_FRAME_SIZE, frame_res))
159 die_codec(&codec, "Failed to get the image frame size");
160
161 // Allocate memory to store decoded references. Allocate memory with the
162 // border so that it can be used as a reference.
163 for (j = 0; j < num_references; j++) {
164 unsigned int border = AOM_DEC_BORDER_IN_PIXELS;
165 if (!aom_img_alloc_with_border(&reference_images[j], ref_fmt,
166 frame_res[0], frame_res[1], 32, 8,
167 border)) {
168 die("Failed to allocate references.");
169 }
170 }
171 }
172
173 if (AOM_CODEC_CONTROL_TYPECHECKED(&codec, AV1_COPY_NEW_FRAME_IMAGE,
174 &reference_images[i]))
175 die_codec(&codec, "Failed to copy decoded reference frame");
176
177 aom_codec_iter_t iter = NULL;
178 aom_image_t *img = NULL;
179 while ((img = aom_codec_get_frame(&codec, &iter)) != NULL) {
180 char name[1024];
181 snprintf(name, sizeof(name), "ref_%d.yuv", i);
182 printf("writing ref image to %s, %d, %d\n", name, img->d_w, img->d_h);
183 FILE *ref_file = fopen(name, "wb");
184 aom_img_write(img, ref_file);
185 fclose(ref_file);
186 }
187 }
188
189 // Decode the lightfield.
190 AOM_CODEC_CONTROL_TYPECHECKED(&codec, AV1_SET_TILE_MODE, 1);
191
192 // Set external references.
193 av1_ext_ref_frame_t set_ext_ref = { &reference_images[0], num_references };
194 AOM_CODEC_CONTROL_TYPECHECKED(&codec, AV1D_SET_EXT_REF_PTR, &set_ext_ref);
195 // Must decode the camera frame header first.
196 aom_video_reader_read_frame(reader);
197 frame = aom_video_reader_get_frame(reader, &frame_size);
198 if (aom_codec_decode(&codec, frame, frame_size, NULL))
199 die_codec(&codec, "Failed to decode the frame.");
200 // Decode tile lists one by one.
201 for (n = 0; n < num_tile_lists; n++) {
202 aom_video_reader_read_frame(reader);
203 frame = aom_video_reader_get_frame(reader, &frame_size);
204
205 if (aom_codec_decode(&codec, frame, frame_size, NULL))
206 die_codec(&codec, "Failed to decode the tile list.");
207 aom_codec_iter_t iter = NULL;
208 aom_image_t *img = aom_codec_get_frame(&codec, &iter);
209 if (!img) die_codec(&codec, "Failed to get frame.");
210
211 if (output_format == YUV1D)
212 // write the tile to the output file in 1D format.
213 write_tile_yuv1d(&codec, img, outfile);
214 else if (output_format == YUV)
215 aom_img_write(img, outfile);
216 else
217 // NV12 output format
218 aom_img_write_nv12(img, outfile);
219 }
220
221 for (i = 0; i < num_references; i++) aom_img_free(&reference_images[i]);
222 if (aom_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec");
223 aom_video_reader_close(reader);
224 fclose(outfile);
225
226 return EXIT_SUCCESS;
227 }
228