AOMedia AV1 Codec
set_maps
1/*
2 * Copyright (c) 2016, 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// AOM Set Active and ROI Maps
13// ===========================
14//
15// This is an example demonstrating how to control the AOM encoder's
16// ROI and Active maps.
17//
18// ROI (Reigon of Interest) maps are a way for the application to assign
19// each macroblock in the image to a region, and then set quantizer and
20// filtering parameters on that image.
21//
22// Active maps are a way for the application to specify on a
23// macroblock-by-macroblock basis whether there is any activity in that
24// macroblock.
25//
26//
27// Configuration
28// -------------
29// An ROI map is set on frame 22. If the width of the image in macroblocks
30// is evenly divisble by 4, then the output will appear to have distinct
31// columns, where the quantizer, loopfilter, and static threshold differ
32// from column to column.
33//
34// An active map is set on frame 33. If the width of the image in macroblocks
35// is evenly divisble by 4, then the output will appear to have distinct
36// columns, where one column will have motion and the next will not.
37//
38// The active map is cleared on frame 44.
39//
40// Observing The Effects
41// ---------------------
42// Use the `simple_decoder` example to decode this sample, and observe
43// the change in the image at frames 22, 33, and 44.
44
45#include <assert.h>
46#include <stdio.h>
47#include <stdlib.h>
48#include <string.h>
49
50#include "aom/aom_encoder.h"
51#include "aom/aomcx.h"
52#include "common/tools_common.h"
53#include "common/video_writer.h"
54
55static const char *exec_name;
56
57void usage_exit(void) {
58 fprintf(stderr, "Usage: %s <codec> <width> <height> <infile> <outfile>\n",
59 exec_name);
60 exit(EXIT_FAILURE);
61}
62
63static void set_active_map(const aom_codec_enc_cfg_t *cfg,
64 aom_codec_ctx_t *codec) {
65 unsigned int i;
66 aom_active_map_t map = { 0, 0, 0 };
67
68 map.rows = (cfg->g_h + 15) / 16;
69 map.cols = (cfg->g_w + 15) / 16;
70
71 map.active_map = (uint8_t *)malloc(map.rows * map.cols);
72 for (i = 0; i < map.rows * map.cols; ++i) map.active_map[i] = i % 2;
73
74 if (aom_codec_control(codec, AOME_SET_ACTIVEMAP, &map))
75 die_codec(codec, "Failed to set active map");
76
77 free(map.active_map);
78}
79
80static void unset_active_map(const aom_codec_enc_cfg_t *cfg,
81 aom_codec_ctx_t *codec) {
82 aom_active_map_t map = { 0, 0, 0 };
83
84 map.rows = (cfg->g_h + 15) / 16;
85 map.cols = (cfg->g_w + 15) / 16;
86 map.active_map = NULL;
87
88 if (aom_codec_control(codec, AOME_SET_ACTIVEMAP, &map))
89 die_codec(codec, "Failed to set active map");
90}
91
92static int encode_frame(aom_codec_ctx_t *codec, aom_image_t *img,
93 int frame_index, AvxVideoWriter *writer) {
94 int got_pkts = 0;
95 aom_codec_iter_t iter = NULL;
96 const aom_codec_cx_pkt_t *pkt = NULL;
97 const aom_codec_err_t res = aom_codec_encode(codec, img, frame_index, 1, 0);
98 if (res != AOM_CODEC_OK) die_codec(codec, "Failed to encode frame");
99
100 while ((pkt = aom_codec_get_cx_data(codec, &iter)) != NULL) {
101 got_pkts = 1;
102
103 if (pkt->kind == AOM_CODEC_CX_FRAME_PKT) {
104 const int keyframe = (pkt->data.frame.flags & AOM_FRAME_IS_KEY) != 0;
105 if (!aom_video_writer_write_frame(writer, pkt->data.frame.buf,
106 pkt->data.frame.sz,
107 pkt->data.frame.pts)) {
108 die_codec(codec, "Failed to write compressed frame");
109 }
110
111 printf(keyframe ? "K" : ".");
112 fflush(stdout);
113 }
114 }
115
116 return got_pkts;
117}
118
119int main(int argc, char **argv) {
120 FILE *infile = NULL;
121 aom_codec_ctx_t codec;
123 int frame_count = 0;
124 const int limit = 10;
125 aom_image_t raw;
126 aom_codec_err_t res;
127 AvxVideoInfo info;
128 AvxVideoWriter *writer = NULL;
129 const int fps = 2; // TODO(dkovalev) add command line argument
130 const double bits_per_pixel_per_frame = 0.067;
131
132#if CONFIG_REALTIME_ONLY
133 const int usage = 1;
134 const int speed = 7;
135#else
136 const int usage = 0;
137 const int speed = 2;
138#endif
139
140 exec_name = argv[0];
141 if (argc != 6) die("Invalid number of arguments");
142
143 memset(&info, 0, sizeof(info));
144
145 aom_codec_iface_t *encoder = get_aom_encoder_by_short_name(argv[1]);
146 if (encoder == NULL) {
147 die("Unsupported codec.");
148 }
149 assert(encoder != NULL);
150 info.codec_fourcc = get_fourcc_by_aom_encoder(encoder);
151 info.frame_width = (int)strtol(argv[2], NULL, 0);
152 info.frame_height = (int)strtol(argv[3], NULL, 0);
153 info.time_base.numerator = 1;
154 info.time_base.denominator = fps;
155
156 if (info.frame_width <= 0 || info.frame_height <= 0 ||
157 (info.frame_width % 2) != 0 || (info.frame_height % 2) != 0) {
158 die("Invalid frame size: %dx%d", info.frame_width, info.frame_height);
159 }
160
161 if (!aom_img_alloc(&raw, AOM_IMG_FMT_I420, info.frame_width,
162 info.frame_height, 1)) {
163 die("Failed to allocate image.");
164 }
165
166 printf("Using %s\n", aom_codec_iface_name(encoder));
167
168 res = aom_codec_enc_config_default(encoder, &cfg, usage);
169 if (res) die_codec(&codec, "Failed to get default codec config.");
170
171 cfg.g_w = info.frame_width;
172 cfg.g_h = info.frame_height;
173 cfg.g_timebase.num = info.time_base.numerator;
174 cfg.g_timebase.den = info.time_base.denominator;
176 (unsigned int)(bits_per_pixel_per_frame * cfg.g_w * cfg.g_h * fps / 1000);
177 cfg.g_lag_in_frames = 0;
178
179 writer = aom_video_writer_open(argv[5], kContainerIVF, &info);
180 if (!writer) die("Failed to open %s for writing.", argv[5]);
181
182 if (!(infile = fopen(argv[4], "rb")))
183 die("Failed to open %s for reading.", argv[4]);
184
185 if (aom_codec_enc_init(&codec, encoder, &cfg, 0))
186 die("Failed to initialize encoder");
187
188 if (aom_codec_control(&codec, AOME_SET_CPUUSED, speed))
189 die_codec(&codec, "Failed to set cpu-used");
190
191 // Encode frames.
192 while (aom_img_read(&raw, infile) && frame_count < limit) {
193 ++frame_count;
194
195 if (frame_count == 5) {
196 set_active_map(&cfg, &codec);
197 } else if (frame_count == 9) {
198 unset_active_map(&cfg, &codec);
199 }
200
201 encode_frame(&codec, &raw, frame_count, writer);
202 }
203
204 // Flush encoder.
205 while (encode_frame(&codec, NULL, -1, writer)) {
206 }
207
208 printf("\n");
209 fclose(infile);
210 printf("Processed %d frames.\n", frame_count);
211
212 aom_img_free(&raw);
213 if (aom_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec.");
214
215 aom_video_writer_close(writer);
216
217 return EXIT_SUCCESS;
218}
Describes the encoder algorithm interface to applications.
aom_image_t * aom_img_alloc(aom_image_t *img, aom_img_fmt_t fmt, unsigned int d_w, unsigned int d_h, unsigned int align)
Open a descriptor, allocating storage for the underlying image.
@ AOM_IMG_FMT_I420
Definition: aom_image.h:45
void aom_img_free(aom_image_t *img)
Close an image descriptor.
Provides definitions for using AOM or AV1 encoder algorithm within the aom Codec Interface.
@ AOME_SET_ACTIVEMAP
Codec control function to pass an Active map to encoder, aom_active_map_t* parameter.
Definition: aomcx.h:189
@ AOME_SET_CPUUSED
Codec control function to set encoder internal speed settings, int parameter.
Definition: aomcx.h:218
const char * aom_codec_iface_name(aom_codec_iface_t *iface)
Return the name for a given interface.
aom_codec_err_t aom_codec_control(aom_codec_ctx_t *ctx, int ctrl_id,...)
Algorithm Control.
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.
aom_codec_err_t
Algorithm return codes.
Definition: aom_codec.h:155
const void * aom_codec_iter_t
Iterator.
Definition: aom_codec.h:288
#define AOM_FRAME_IS_KEY
Definition: aom_codec.h:271
@ AOM_CODEC_OK
Operation completed without error.
Definition: aom_codec.h:157
const aom_codec_cx_pkt_t * aom_codec_get_cx_data(aom_codec_ctx_t *ctx, aom_codec_iter_t *iter)
Encoded data iterator.
aom_codec_err_t aom_codec_encode(aom_codec_ctx_t *ctx, const aom_image_t *img, aom_codec_pts_t pts, unsigned long duration, aom_enc_frame_flags_t flags)
Encode a frame.
#define aom_codec_enc_init(ctx, iface, cfg, flags)
Convenience macro for aom_codec_enc_init_ver()
Definition: aom_encoder.h:950
aom_codec_err_t aom_codec_enc_config_default(aom_codec_iface_t *iface, aom_codec_enc_cfg_t *cfg, unsigned int usage)
Get the default configuration for a usage.
@ AOM_CODEC_CX_FRAME_PKT
Definition: aom_encoder.h:109
aom active region map
Definition: aomcx.h:1456
unsigned int rows
Definition: aomcx.h:1459
unsigned int cols
Definition: aomcx.h:1460
unsigned char * active_map
specify an on (1) or off (0) each 16x16 region within a frame
Definition: aomcx.h:1458
Codec context structure.
Definition: aom_codec.h:298
Encoder output packet.
Definition: aom_encoder.h:121
size_t sz
Definition: aom_encoder.h:126
enum aom_codec_cx_pkt_kind kind
Definition: aom_encoder.h:122
union aom_codec_cx_pkt::@1 data
aom_codec_pts_t pts
time stamp to show frame (in timebase units)
Definition: aom_encoder.h:128
struct aom_codec_cx_pkt::@1::@2 frame
aom_codec_frame_flags_t flags
Definition: aom_encoder.h:131
void * buf
Definition: aom_encoder.h:125
Encoder configuration structure.
Definition: aom_encoder.h:386
struct aom_rational g_timebase
Stream timebase units.
Definition: aom_encoder.h:483
unsigned int g_h
Height of the frame.
Definition: aom_encoder.h:434
unsigned int g_lag_in_frames
Allow lagged encoding.
Definition: aom_encoder.h:512
unsigned int g_w
Width of the frame.
Definition: aom_encoder.h:425
unsigned int rc_target_bitrate
Target data rate.
Definition: aom_encoder.h:637
Image Descriptor.
Definition: aom_image.h:171
int num
Definition: aom_encoder.h:164
int den
Definition: aom_encoder.h:165