AOMedia Codec SDK
lossless_encoder
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#include <stdio.h>
13#include <stdlib.h>
14#include <string.h>
15
16#include "aom/aom_encoder.h"
17#include "aom/aomcx.h"
18#include "common/tools_common.h"
19#include "common/video_writer.h"
20
21static const char *exec_name;
22
23void usage_exit(void) {
24 fprintf(stderr,
25 "lossless_encoder: Example demonstrating lossless "
26 "encoding feature. Supports raw input only.\n");
27 fprintf(stderr, "Usage: %s <width> <height> <infile> <outfile>\n", exec_name);
28 exit(EXIT_FAILURE);
29}
30
31static int encode_frame(aom_codec_ctx_t *codec, aom_image_t *img,
32 int frame_index, int flags, AvxVideoWriter *writer) {
33 int got_pkts = 0;
34 aom_codec_iter_t iter = NULL;
35 const aom_codec_cx_pkt_t *pkt = NULL;
36 const aom_codec_err_t res =
37 aom_codec_encode(codec, img, frame_index, 1, flags);
38 if (res != AOM_CODEC_OK) die_codec(codec, "Failed to encode frame");
39
40 while ((pkt = aom_codec_get_cx_data(codec, &iter)) != NULL) {
41 got_pkts = 1;
42
43 if (pkt->kind == AOM_CODEC_CX_FRAME_PKT) {
44 const int keyframe = (pkt->data.frame.flags & AOM_FRAME_IS_KEY) != 0;
45 if (!aom_video_writer_write_frame(writer, pkt->data.frame.buf,
46 pkt->data.frame.sz,
47 pkt->data.frame.pts)) {
48 die_codec(codec, "Failed to write compressed frame");
49 }
50 printf(keyframe ? "K" : ".");
51 fflush(stdout);
52 }
53 }
54
55 return got_pkts;
56}
57
58int main(int argc, char **argv) {
59 FILE *infile = NULL;
60 aom_codec_ctx_t codec;
62 int frame_count = 0;
63 aom_image_t raw;
65 AvxVideoInfo info;
66 AvxVideoWriter *writer = NULL;
67 const AvxInterface *encoder = NULL;
68 const int fps = 30;
69
70 exec_name = argv[0];
71
72 // Clear explicitly, as simply assigning "{ 0 }" generates
73 // "missing-field-initializers" warning in some compilers.
74 memset(&info, 0, sizeof(info));
75
76 if (argc < 5) die("Invalid number of arguments");
77
78 encoder = get_aom_encoder_by_name("av1");
79 if (!encoder) die("Unsupported codec.");
80
81 info.codec_fourcc = encoder->fourcc;
82 info.frame_width = (int)strtol(argv[1], NULL, 0);
83 info.frame_height = (int)strtol(argv[2], NULL, 0);
84 info.time_base.numerator = 1;
85 info.time_base.denominator = fps;
86
87 if (info.frame_width <= 0 || info.frame_height <= 0 ||
88 (info.frame_width % 2) != 0 || (info.frame_height % 2) != 0) {
89 die("Invalid frame size: %dx%d", info.frame_width, info.frame_height);
90 }
91
92 if (!aom_img_alloc(&raw, AOM_IMG_FMT_I420, info.frame_width,
93 info.frame_height, 1)) {
94 die("Failed to allocate image.");
95 }
96
97 printf("Using %s\n", aom_codec_iface_name(encoder->codec_interface()));
98
99 res = aom_codec_enc_config_default(encoder->codec_interface(), &cfg, 0);
100 if (res) die_codec(&codec, "Failed to get default codec config.");
101
102 cfg.g_w = info.frame_width;
103 cfg.g_h = info.frame_height;
104 cfg.g_timebase.num = info.time_base.numerator;
105 cfg.g_timebase.den = info.time_base.denominator;
106
107 writer = aom_video_writer_open(argv[4], kContainerIVF, &info);
108 if (!writer) die("Failed to open %s for writing.", argv[4]);
109
110 if (!(infile = fopen(argv[3], "rb")))
111 die("Failed to open %s for reading.", argv[3]);
112
113 if (aom_codec_enc_init(&codec, encoder->codec_interface(), &cfg, 0))
114 die_codec(&codec, "Failed to initialize encoder");
115
117 die_codec(&codec, "Failed to use lossless mode");
118
119 // Encode frames.
120 while (aom_img_read(&raw, infile)) {
121 encode_frame(&codec, &raw, frame_count++, 0, writer);
122 }
123
124 // Flush encoder.
125 while (encode_frame(&codec, NULL, -1, 0, writer)) {
126 }
127
128 printf("\n");
129 fclose(infile);
130 printf("Processed %d frames.\n", frame_count);
131
132 aom_img_free(&raw);
133 if (aom_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec.");
134
135 aom_video_writer_close(writer);
136
137 return EXIT_SUCCESS;
138}
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.
@ AV1E_SET_LOSSLESS
Codec control function to set lossless encoding mode.
Definition: aomcx.h:283
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,...)
Control algorithm.
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:101
const void * aom_codec_iter_t
Iterator.
Definition: aom_codec.h:194
@ AOM_CODEC_OK
Operation completed without error.
Definition: aom_codec.h:103
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:764
aom_codec_err_t aom_codec_enc_config_default(aom_codec_iface_t *iface, aom_codec_enc_cfg_t *cfg, unsigned int reserved)
Get a default configuration.
#define AOM_FRAME_IS_KEY
Definition: aom_encoder.h:96
@ AOM_CODEC_CX_FRAME_PKT
Definition: aom_encoder.h:126
Codec context structure.
Definition: aom_codec.h:204
Encoder output packet.
Definition: aom_encoder.h:138
size_t sz
Definition: aom_encoder.h:143
enum aom_codec_cx_pkt_kind kind
Definition: aom_encoder.h:139
union aom_codec_cx_pkt::@1 data
aom_codec_pts_t pts
time stamp to show frame (in timebase units)
Definition: aom_encoder.h:145
struct aom_codec_cx_pkt::@1::@2 frame
aom_codec_frame_flags_t flags
Definition: aom_encoder.h:148
void * buf
Definition: aom_encoder.h:142
Encoder configuration structure.
Definition: aom_encoder.h:228
struct aom_rational g_timebase
Stream timebase units.
Definition: aom_encoder.h:325
unsigned int g_h
Height of the frame.
Definition: aom_encoder.h:276
unsigned int g_w
Width of the frame.
Definition: aom_encoder.h:267
Image Descriptor.
Definition: aom_image.h:141
int num
Definition: aom_encoder.h:179
int den
Definition: aom_encoder.h:180