AOMedia Codec SDK

lightfield_tile_list_decoder
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. The lf_width and
20 // lf_height arguments are the number of lightfield images in each dimension.
21 // The lf_blocksize determines the number of reference images used.
22 // Run lightfield tile list decoder to decode an AV1 tile list file:
23 // examples/lightfield_tile_list_decoder vase_tile_list.ivf vase_tile_list.yuv
24 // 10 10 5 2
25
26 #include <stdio.h>
27 #include <stdlib.h>
28 #include <string.h>
29 #include <assert.h>
30
31 #include "aom/aom_decoder.h"
32 #include "aom/aomdx.h"
33 #include "common/tools_common.h"
34 #include "common/video_reader.h"
35
36 #define MAX_EXTERNAL_REFERENCES 128
37 #define AOM_BORDER_IN_PIXELS 288
38
39 static const char *exec_name;
40
41 void usage_exit(void) {
42 fprintf(stderr,
43 "Usage: %s <infile> <outfile> <lf_width> <lf_height> <lf_blocksize> "
44 "<num_tile_lists>\n",
45 exec_name);
46 exit(EXIT_FAILURE);
47 }
48
49 int main(int argc, char **argv) {
50 FILE *outfile = NULL;
51 aom_codec_ctx_t codec;
52 AvxVideoReader *reader = NULL;
53 const AvxInterface *decoder = NULL;
54 const AvxVideoInfo *info = NULL;
55 const char *lf_width_arg;
56 const char *lf_height_arg;
57 const char *lf_blocksize_arg;
58 int width, height;
59 int lf_width, lf_height, lf_blocksize;
60 int u_blocks, v_blocks;
61 int num_tile_lists;
62 aom_image_t reference_images[MAX_EXTERNAL_REFERENCES];
63 size_t frame_size = 0;
64 const unsigned char *frame = NULL;
65 int i, n;
66
67 exec_name = argv[0];
68
69 if (argc != 7) die("Invalid number of arguments.");
70
71 reader = aom_video_reader_open(argv[1]);
72 if (!reader) die("Failed to open %s for reading.", argv[1]);
73
74 if (!(outfile = fopen(argv[2], "wb")))
75 die("Failed to open %s for writing.", argv[2]);
76
77 lf_width_arg = argv[3];
78 lf_height_arg = argv[4];
79 lf_blocksize_arg = argv[5];
80 lf_width = (int)strtol(lf_width_arg, NULL, 0);
81 lf_height = (int)strtol(lf_height_arg, NULL, 0);
82 lf_blocksize = (int)strtol(lf_blocksize_arg, NULL, 0);
83 num_tile_lists = (int)strtol(argv[6], NULL, 0);
84
85 info = aom_video_reader_get_info(reader);
86 width = info->frame_width;
87 height = info->frame_height;
88
89 decoder = get_aom_decoder_by_fourcc(info->codec_fourcc);
90 if (!decoder) die("Unknown input codec.");
91 printf("Using %s\n", aom_codec_iface_name(decoder->codec_interface()));
92
93 if (aom_codec_dec_init(&codec, decoder->codec_interface(), NULL, 0))
94 die_codec(&codec, "Failed to initialize decoder.");
95
96 // How many anchor frames we have.
97 u_blocks = (lf_width + lf_blocksize - 1) / lf_blocksize;
98 v_blocks = (lf_height + lf_blocksize - 1) / lf_blocksize;
99
100 int num_references = v_blocks * u_blocks;
101
102 // Allocate memory to store decoded references.
103 aom_img_fmt_t ref_fmt = AOM_IMG_FMT_I420;
104 if (!CONFIG_LOWBITDEPTH) ref_fmt |= AOM_IMG_FMT_HIGHBITDEPTH;
105 // Allocate memory with the border so that it can be used as a reference.
106 for (i = 0; i < num_references; i++) {
107 unsigned int border = AOM_BORDER_IN_PIXELS;
108 if (!aom_img_alloc_with_border(&reference_images[i], ref_fmt, width, height,
109 32, 8, border)) {
110 die("Failed to allocate references.");
111 }
112 }
113
114 // Decode anchor frames.
115 aom_codec_control_(&codec, AV1_SET_TILE_MODE, 0);
116
117 for (i = 0; i < num_references; ++i) {
118 aom_video_reader_read_frame(reader);
119 frame = aom_video_reader_get_frame(reader, &frame_size);
120 if (aom_codec_decode(&codec, frame, frame_size, NULL))
121 die_codec(&codec, "Failed to decode frame.");
122
123 if (aom_codec_control(&codec, AV1_COPY_NEW_FRAME_IMAGE,
124 &reference_images[i]))
125 die_codec(&codec, "Failed to copy decoded reference frame");
126
127 aom_codec_iter_t iter = NULL;
128 aom_image_t *img = NULL;
129 while ((img = aom_codec_get_frame(&codec, &iter)) != NULL) {
130 char name[1024];
131 snprintf(name, sizeof(name), "ref_%d.yuv", i);
132 printf("writing ref image to %s, %d, %d\n", name, img->d_w, img->d_h);
133 FILE *ref_file = fopen(name, "wb");
134 aom_img_write(img, ref_file);
135 fclose(ref_file);
136 }
137 }
138
139 // Decode the lightfield.
140 aom_codec_control_(&codec, AV1_SET_TILE_MODE, 1);
141
142 // Set external references.
143 av1_ext_ref_frame_t set_ext_ref = { &reference_images[0], num_references };
144 aom_codec_control_(&codec, AV1D_SET_EXT_REF_PTR, &set_ext_ref);
145
146 // Must decode the camera frame header first.
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 the frame.");
151
152 // Decode tile lists one by one.
153 for (n = 0; n < num_tile_lists; n++) {
154 aom_video_reader_read_frame(reader);
155 frame = aom_video_reader_get_frame(reader, &frame_size);
156
157 if (aom_codec_decode(&codec, frame, frame_size, NULL))
158 die_codec(&codec, "Failed to decode the tile list.");
159
160 aom_codec_iter_t iter = NULL;
161 aom_image_t *img;
162 while ((img = aom_codec_get_frame(&codec, &iter)))
163 fwrite(img->img_data, 1, img->sz, outfile);
164 }
165
166 for (i = 0; i < num_references; i++) aom_img_free(&reference_images[i]);
167 if (aom_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec");
168 aom_video_reader_close(reader);
169 fclose(outfile);
170
171 return EXIT_SUCCESS;
172 }
aom_image::img_data
unsigned char * img_data
Definition: aom_image.h:188
aom_image::d_h
unsigned int d_h
Definition: aom_image.h:157
aom_codec_get_frame
aom_image_t * aom_codec_get_frame(aom_codec_ctx_t *ctx, aom_codec_iter_t *iter)
Decoded frames iterator.
aom_img_fmt_t
enum aom_img_fmt aom_img_fmt_t
List of supported image formats.
aom_codec_ctx
Codec context structure.
Definition: aom_codec.h:204
AOM_IMG_FMT_HIGHBITDEPTH
#define AOM_IMG_FMT_HIGHBITDEPTH
Definition: aom_image.h:38
aom_decoder.h
Describes the decoder algorithm interface to applications.
AV1D_SET_EXT_REF_PTR
Definition: aomdx.h:184
aom_image
Image Descriptor.
Definition: aom_image.h:141
aom_codec_decode
aom_codec_err_t aom_codec_decode(aom_codec_ctx_t *ctx, const uint8_t *data, size_t data_sz, void *user_priv)
Decode data.
aom_codec_control_
aom_codec_err_t aom_codec_control_(aom_codec_ctx_t *ctx, int ctrl_id,...)
Control algorithm.
aom_codec_dec_init
#define aom_codec_dec_init(ctx, iface, cfg, flags)
Convenience macro for aom_codec_dec_init_ver()
Definition: aom_decoder.h:142
aom_codec_iface_name
const char * aom_codec_iface_name(aom_codec_iface_t *iface)
Return the name for a given interface.
aom_codec_destroy
aom_codec_err_t aom_codec_destroy(aom_codec_ctx_t *ctx)
Destroy a codec instance.
aom_img_alloc_with_border
aom_image_t * aom_img_alloc_with_border(aom_image_t *img, aom_img_fmt_t fmt, unsigned int d_w, unsigned int d_h, unsigned int align, unsigned int size_align, unsigned int border)
Open a descriptor, allocating storage for the underlying image with a border.
aom_img_free
void aom_img_free(aom_image_t *img)
Close an image descriptor.
aom_codec_control
#define aom_codec_control(ctx, id, data)
aom_codec_control wrapper macro
Definition: aom_codec.h:423
AV1_COPY_NEW_FRAME_IMAGE
Definition: aom.h:66
aom_codec_iter_t
const void * aom_codec_iter_t
Iterator.
Definition: aom_codec.h:194
AV1_SET_TILE_MODE
Definition: aomdx.h:171
aom_image::sz
size_t sz
Definition: aom_image.h:175
av1_ext_ref_frame
Structure to hold the external reference frame pointer.
Definition: aomdx.h:80
aomdx.h
Provides definitions for using AOM or AV1 within the aom Decoder interface.
AOM_IMG_FMT_I420
Definition: aom_image.h:45
aom_image::d_w
unsigned int d_w
Definition: aom_image.h:156