AOMedia AV1 Codec
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. 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
40static const char *exec_name;
41
42void 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
50static 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;
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;
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
99int main(int argc, char **argv) {
100 FILE *outfile = NULL;
101 AvxVideoReader *reader = NULL;
102 const AvxVideoInfo *info = NULL;
103 int num_references;
104 int num_tile_lists;
105 aom_image_t reference_images[MAX_EXTERNAL_REFERENCES];
106 size_t frame_size = 0;
107 const unsigned char *frame = NULL;
108 int output_format = YUV1D;
109 int i, j, n;
110
111 exec_name = argv[0];
112
113 if (argc < 5) die("Invalid number of arguments.");
114
115 reader = aom_video_reader_open(argv[1]);
116 if (!reader) die("Failed to open %s for reading.", argv[1]);
117
118 if (!(outfile = fopen(argv[2], "wb")))
119 die("Failed to open %s for writing.", argv[2]);
120
121 num_references = (int)strtol(argv[3], NULL, 0);
122 num_tile_lists = (int)strtol(argv[4], NULL, 0);
123
124 if (argc > 5) output_format = (int)strtol(argv[5], NULL, 0);
125 if (output_format < YUV1D || output_format > NV12)
126 die("Output format out of range [0, 2]");
127
128 info = aom_video_reader_get_info(reader);
129
130 aom_codec_iface_t *decoder = get_aom_decoder_by_fourcc(info->codec_fourcc);
131 if (!decoder) die("Unknown input codec.");
132 printf("Using %s\n", aom_codec_iface_name(decoder));
133
134 aom_codec_ctx_t codec;
135 if (aom_codec_dec_init(&codec, decoder, NULL, 0))
136 die("Failed to initialize decoder.");
137
139 info->is_annexb)) {
140 die_codec(&codec, "Failed to set annex b status");
141 }
142
143 // Decode anchor frames.
145 for (i = 0; i < num_references; ++i) {
146 aom_video_reader_read_frame(reader);
147 frame = aom_video_reader_get_frame(reader, &frame_size);
148 if (aom_codec_decode(&codec, frame, frame_size, NULL))
149 die_codec(&codec, "Failed to decode frame.");
150
151 if (i == 0) {
152 aom_img_fmt_t ref_fmt = 0;
154 die_codec(&codec, "Failed to get the image format");
155
156 int frame_res[2];
158 die_codec(&codec, "Failed to get the image frame size");
159
160 // Allocate memory to store decoded references. Allocate memory with the
161 // border so that it can be used as a reference.
162 for (j = 0; j < num_references; j++) {
163 unsigned int border = AOM_DEC_BORDER_IN_PIXELS;
164 if (!aom_img_alloc_with_border(&reference_images[j], ref_fmt,
165 frame_res[0], frame_res[1], 32, 8,
166 border)) {
167 die("Failed to allocate references.");
168 }
169 }
170 }
171
173 &reference_images[i]))
174 die_codec(&codec, "Failed to copy decoded reference frame");
175
176 aom_codec_iter_t iter = NULL;
177 aom_image_t *img = NULL;
178 while ((img = aom_codec_get_frame(&codec, &iter)) != NULL) {
179 char name[1024];
180 snprintf(name, sizeof(name), "ref_%d.yuv", i);
181 printf("writing ref image to %s, %u, %u\n", name, img->d_w, img->d_h);
182 FILE *ref_file = fopen(name, "wb");
183 aom_img_write(img, ref_file);
184 fclose(ref_file);
185 }
186 }
187
188 // Decode the lightfield.
190
191 // Set external references.
192 av1_ext_ref_frame_t set_ext_ref = { &reference_images[0], num_references };
194 // Must decode the camera frame header first.
195 aom_video_reader_read_frame(reader);
196 frame = aom_video_reader_get_frame(reader, &frame_size);
197 if (aom_codec_decode(&codec, frame, frame_size, NULL))
198 die_codec(&codec, "Failed to decode the frame.");
199 // Decode tile lists one by one.
200 for (n = 0; n < num_tile_lists; n++) {
201 aom_video_reader_read_frame(reader);
202 frame = aom_video_reader_get_frame(reader, &frame_size);
203
204 if (aom_codec_decode(&codec, frame, frame_size, NULL))
205 die_codec(&codec, "Failed to decode the tile list.");
206 aom_codec_iter_t iter = NULL;
207 aom_image_t *img = aom_codec_get_frame(&codec, &iter);
208 if (!img) die_codec(&codec, "Failed to get frame.");
209
210 if (output_format == YUV1D)
211 // write the tile to the output file in 1D format.
212 write_tile_yuv1d(&codec, img, outfile);
213 else if (output_format == YUV)
214 aom_img_write(img, outfile);
215 else
216 // NV12 output format
217 aom_img_write_nv12(img, outfile);
218 }
219
220 for (i = 0; i < num_references; i++) aom_img_free(&reference_images[i]);
221 if (aom_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec");
222 aom_video_reader_close(reader);
223 fclose(outfile);
224
225 return EXIT_SUCCESS;
226}
Describes the decoder algorithm interface to applications.
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.
#define AOM_IMG_FMT_HIGHBITDEPTH
Definition aom_image.h:38
enum aom_img_fmt aom_img_fmt_t
List of supported image formats.
void aom_img_free(aom_image_t *img)
Close an image descriptor.
Provides definitions for using AOM or AV1 within the aom Decoder interface.
@ AV1_SET_TILE_MODE
Codec control function to set the tile coding mode, unsigned int parameter.
Definition aomdx.h:313
@ AV1D_GET_FRAME_SIZE
Codec control function to get the dimensions that the current frame is decoded at,...
Definition aomdx.h:217
@ AV1D_SET_IS_ANNEXB
Codec control function to indicate whether bitstream is in Annex-B format, unsigned int parameter.
Definition aomdx.h:349
@ AV1D_GET_TILE_COUNT
Codec control function to get the tile count in a tile list, unsigned int* parameter.
Definition aomdx.h:245
@ AV1D_GET_TILE_SIZE
Codec control function to get the size of the tile, unsigned int* parameter.
Definition aomdx.h:240
@ AV1D_GET_IMG_FORMAT
Codec control function to get the image format of the stream, aom_img_fmt_t* parameter.
Definition aomdx.h:235
@ AV1D_SET_EXT_REF_PTR
Codec control function to set the external references' pointers in the decoder, av1_ext_ref_frame_t* ...
Definition aomdx.h:331
@ AV1_COPY_NEW_FRAME_IMAGE
Codec control function to copy the new frame to an external buffer.
Definition aom.h:76
const char * aom_codec_iface_name(aom_codec_iface_t *iface)
Return the name for a given interface.
const struct aom_codec_iface aom_codec_iface_t
Codec interface structure.
Definition aom_codec.h:254
aom_codec_err_t aom_codec_destroy(aom_codec_ctx_t *ctx)
Destroy a codec instance.
#define AOM_CODEC_CONTROL_TYPECHECKED(ctx, id, data)
aom_codec_control wrapper macro (adds type-checking, less flexible)
Definition aom_codec.h:521
const void * aom_codec_iter_t
Iterator.
Definition aom_codec.h:288
aom_image_t * aom_codec_get_frame(aom_codec_ctx_t *ctx, aom_codec_iter_t *iter)
Decoded frames iterator.
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.
#define aom_codec_dec_init(ctx, iface, cfg, flags)
Convenience macro for aom_codec_dec_init_ver()
Definition aom_decoder.h:129
Codec context structure.
Definition aom_codec.h:298
Image Descriptor.
Definition aom_image.h:171
unsigned int y_chroma_shift
Definition aom_image.h:195
aom_img_fmt_t fmt
Definition aom_image.h:172
int stride[3]
Definition aom_image.h:203
unsigned int x_chroma_shift
Definition aom_image.h:194
unsigned int d_w
Definition aom_image.h:186
unsigned int d_h
Definition aom_image.h:187
unsigned char * planes[3]
Definition aom_image.h:202
Structure to hold the external reference frame pointer.
Definition aomdx.h:179