AOMedia AV1 Codec
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 
21 static const char *exec_name;
22 
23 void 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 
31 static 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 
58 int main(int argc, char **argv) {
59  FILE *infile = NULL;
61  int frame_count = 0;
62  aom_image_t raw;
63  aom_codec_err_t res;
64  AvxVideoInfo info;
65  AvxVideoWriter *writer = NULL;
66  const int fps = 30;
67 
68  exec_name = argv[0];
69 
70  // Clear explicitly, as simply assigning "{ 0 }" generates
71  // "missing-field-initializers" warning in some compilers.
72  memset(&info, 0, sizeof(info));
73 
74  if (argc < 5) die("Invalid number of arguments");
75 
76  aom_codec_iface_t *encoder = get_aom_encoder_by_short_name("av1");
77  if (!encoder) die("Unsupported codec.");
78 
79  info.codec_fourcc = get_fourcc_by_aom_encoder(encoder);
80  info.frame_width = (int)strtol(argv[1], NULL, 0);
81  info.frame_height = (int)strtol(argv[2], NULL, 0);
82  info.time_base.numerator = 1;
83  info.time_base.denominator = fps;
84 
85  if (info.frame_width <= 0 || info.frame_height <= 0 ||
86  (info.frame_width % 2) != 0 || (info.frame_height % 2) != 0) {
87  die("Invalid frame size: %dx%d", info.frame_width, info.frame_height);
88  }
89 
90  if (!aom_img_alloc(&raw, AOM_IMG_FMT_I420, info.frame_width,
91  info.frame_height, 1)) {
92  die("Failed to allocate image.");
93  }
94 
95  printf("Using %s\n", aom_codec_iface_name(encoder));
96 
97  aom_codec_ctx_t codec;
98  res = aom_codec_enc_config_default(encoder, &cfg, 0);
99  if (res) die_codec(&codec, "Failed to get default codec config.");
100 
101  cfg.g_w = info.frame_width;
102  cfg.g_h = info.frame_height;
103  cfg.g_timebase.num = info.time_base.numerator;
104  cfg.g_timebase.den = info.time_base.denominator;
105 
106  writer = aom_video_writer_open(argv[4], kContainerIVF, &info);
107  if (!writer) die("Failed to open %s for writing.", argv[4]);
108 
109  if (!(infile = fopen(argv[3], "rb")))
110  die("Failed to open %s for reading.", argv[3]);
111 
112  if (aom_codec_enc_init(&codec, encoder, &cfg, 0))
113  die("Failed to initialize encoder");
114 
116  die_codec(&codec, "Failed to use lossless mode");
117 
118  // Encode frames.
119  while (aom_img_read(&raw, infile)) {
120  encode_frame(&codec, &raw, frame_count++, 0, writer);
121  }
122 
123  // Flush encoder.
124  while (encode_frame(&codec, NULL, -1, 0, writer)) {
125  }
126 
127  printf("\n");
128  fclose(infile);
129  printf("Processed %d frames.\n", frame_count);
130 
131  aom_img_free(&raw);
132  if (aom_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec.");
133 
134  aom_video_writer_close(writer);
135 
136  return EXIT_SUCCESS;
137 }
Operation completed without error.
Definition: aom_codec.h:157
unsigned int g_w
Width of the frame.
Definition: aom_encoder.h:406
#define AOM_CODEC_CONTROL_TYPECHECKED(ctx, id, data)
aom_codec_control wrapper macro (adds type-checking, less flexible)
Definition: aom_codec.h:520
Describes the encoder algorithm interface to applications.
#define aom_codec_enc_init(ctx, iface, cfg, flags)
Convenience macro for aom_codec_enc_init_ver()
Definition: aom_encoder.h:931
Encoder configuration structure.
Definition: aom_encoder.h:367
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.
Provides definitions for using AOM or AV1 encoder algorithm within the aom Codec Interface.
Codec context structure.
Definition: aom_codec.h:298
Image Descriptor.
Definition: aom_image.h:171
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.
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.
const struct aom_codec_iface aom_codec_iface_t
Codec interface structure.
Definition: aom_codec.h:254
const char * aom_codec_iface_name(aom_codec_iface_t *iface)
Return the name for a given interface.
struct aom_rational g_timebase
Stream timebase units.
Definition: aom_encoder.h:464
aom_codec_err_t aom_codec_destroy(aom_codec_ctx_t *ctx)
Destroy a codec instance.
enum aom_codec_cx_pkt_kind kind
Definition: aom_encoder.h:111
void aom_img_free(aom_image_t *img)
Close an image descriptor.
struct aom_codec_cx_pkt::@1::@2 frame
Definition: aom_encoder.h:98
Codec control function to set lossless encoding mode, unsigned int parameter.
Definition: aomcx.h:342
const void * aom_codec_iter_t
Iterator.
Definition: aom_codec.h:288
#define AOM_FRAME_IS_KEY
Definition: aom_codec.h:271
aom_codec_err_t
Algorithm return codes.
Definition: aom_codec.h:155
int den
Definition: aom_encoder.h:154
Encoder output packet.
Definition: aom_encoder.h:110
int num
Definition: aom_encoder.h:153
Definition: aom_image.h:45
union aom_codec_cx_pkt::@1 data
unsigned int g_h
Height of the frame.
Definition: aom_encoder.h:415