WebM Codec SDK
vp9_lossless_encoder
1 /*
2  * Copyright (c) 2014 The WebM project authors. All Rights Reserved.
3  *
4  * Use of this source code is governed by a BSD-style license
5  * that can be found in the LICENSE file in the root of the source
6  * tree. An additional intellectual property rights grant can be found
7  * in the file PATENTS. All contributing project authors may
8  * be found in the AUTHORS file in the root of the source tree.
9  */
10 
11 #include <stdio.h>
12 #include <stdlib.h>
13 #include <string.h>
14 
15 #include "vpx/vpx_encoder.h"
16 #include "vpx/vp8cx.h"
17 
18 #include "../tools_common.h"
19 #include "../video_writer.h"
20 
21 static const char *exec_name;
22 
23 void usage_exit(void) {
24  fprintf(stderr, "vp9_lossless_encoder: Example demonstrating VP9 lossless "
25  "encoding feature. Supports raw input only.\n");
26  fprintf(stderr, "Usage: %s <width> <height> <infile> <outfile>\n", exec_name);
27  exit(EXIT_FAILURE);
28 }
29 
30 static int encode_frame(vpx_codec_ctx_t *codec,
31  vpx_image_t *img,
32  int frame_index,
33  int flags,
34  VpxVideoWriter *writer) {
35  int got_pkts = 0;
36  vpx_codec_iter_t iter = NULL;
37  const vpx_codec_cx_pkt_t *pkt = NULL;
38  const vpx_codec_err_t res = vpx_codec_encode(codec, img, frame_index, 1,
39  flags, VPX_DL_GOOD_QUALITY);
40  if (res != VPX_CODEC_OK)
41  die_codec(codec, "Failed to encode frame");
42 
43  while ((pkt = vpx_codec_get_cx_data(codec, &iter)) != NULL) {
44  got_pkts = 1;
45 
46  if (pkt->kind == VPX_CODEC_CX_FRAME_PKT) {
47  const int keyframe = (pkt->data.frame.flags & VPX_FRAME_IS_KEY) != 0;
48  if (!vpx_video_writer_write_frame(writer,
49  pkt->data.frame.buf,
50  pkt->data.frame.sz,
51  pkt->data.frame.pts)) {
52  die_codec(codec, "Failed to write compressed frame");
53  }
54  printf(keyframe ? "K" : ".");
55  fflush(stdout);
56  }
57  }
58 
59  return got_pkts;
60 }
61 
62 int main(int argc, char **argv) {
63  FILE *infile = NULL;
64  vpx_codec_ctx_t codec;
66  int frame_count = 0;
67  vpx_image_t raw;
68  vpx_codec_err_t res;
69  VpxVideoInfo info = {0};
70  VpxVideoWriter *writer = NULL;
71  const VpxInterface *encoder = NULL;
72  const int fps = 30;
73 
74  exec_name = argv[0];
75 
76  if (argc < 5)
77  die("Invalid number of arguments");
78 
79  encoder = get_vpx_encoder_by_name("vp9");
80  if (!encoder)
81  die("Unsupported codec.");
82 
83  info.codec_fourcc = encoder->fourcc;
84  info.frame_width = strtol(argv[1], NULL, 0);
85  info.frame_height = strtol(argv[2], NULL, 0);
86  info.time_base.numerator = 1;
87  info.time_base.denominator = fps;
88 
89  if (info.frame_width <= 0 ||
90  info.frame_height <= 0 ||
91  (info.frame_width % 2) != 0 ||
92  (info.frame_height % 2) != 0) {
93  die("Invalid frame size: %dx%d", info.frame_width, info.frame_height);
94  }
95 
96  if (!vpx_img_alloc(&raw, VPX_IMG_FMT_I420, info.frame_width,
97  info.frame_height, 1)) {
98  die("Failed to allocate image.");
99  }
100 
101  printf("Using %s\n", vpx_codec_iface_name(encoder->codec_interface()));
102 
103  res = vpx_codec_enc_config_default(encoder->codec_interface(), &cfg, 0);
104  if (res)
105  die_codec(&codec, "Failed to get default codec config.");
106 
107  cfg.g_w = info.frame_width;
108  cfg.g_h = info.frame_height;
109  cfg.g_timebase.num = info.time_base.numerator;
110  cfg.g_timebase.den = info.time_base.denominator;
111 
112  writer = vpx_video_writer_open(argv[4], kContainerIVF, &info);
113  if (!writer)
114  die("Failed to open %s for writing.", argv[4]);
115 
116  if (!(infile = fopen(argv[3], "rb")))
117  die("Failed to open %s for reading.", argv[3]);
118 
119  if (vpx_codec_enc_init(&codec, encoder->codec_interface(), &cfg, 0))
120  die_codec(&codec, "Failed to initialize encoder");
121 
122  if (vpx_codec_control_(&codec, VP9E_SET_LOSSLESS, 1))
123  die_codec(&codec, "Failed to use lossless mode");
124 
125  // Encode frames.
126  while (vpx_img_read(&raw, infile)) {
127  encode_frame(&codec, &raw, frame_count++, 0, writer);
128  }
129 
130  // Flush encoder.
131  while (encode_frame(&codec, NULL, -1, 0, writer)) {}
132 
133  printf("\n");
134  fclose(infile);
135  printf("Processed %d frames.\n", frame_count);
136 
137  vpx_img_free(&raw);
138  if (vpx_codec_destroy(&codec))
139  die_codec(&codec, "Failed to destroy codec.");
140 
141  vpx_video_writer_close(writer);
142 
143  return EXIT_SUCCESS;
144 }
Image Descriptor.
Definition: vpx_image.h:82
Describes the encoder algorithm interface to applications.
const char * vpx_codec_iface_name(vpx_codec_iface_t *iface)
Return the name for a given interface.
struct vpx_rational g_timebase
Stream timebase units.
Definition: vpx_encoder.h:397
int den
Definition: vpx_encoder.h:261
vpx_codec_err_t vpx_codec_encode(vpx_codec_ctx_t *ctx, const vpx_image_t *img, vpx_codec_pts_t pts, unsigned long duration, vpx_enc_frame_flags_t flags, unsigned long deadline)
Encode a frame.
Encoder configuration structure.
Definition: vpx_encoder.h:314
Encoder output packet.
Definition: vpx_encoder.h:195
struct vpx_codec_cx_pkt::@1::@2 frame
vpx_image_t * vpx_img_alloc(vpx_image_t *img, vpx_img_fmt_t fmt, unsigned int d_w, unsigned int d_h, unsigned int align)
Open a descriptor, allocating storage for the underlying image.
Definition: vpx_image.h:56
unsigned int g_w
Width of the frame.
Definition: vpx_encoder.h:357
unsigned int g_h
Height of the frame.
Definition: vpx_encoder.h:367
enum vpx_codec_cx_pkt_kind kind
Definition: vpx_encoder.h:196
Codec control function to set lossless encoding mode.
Definition: vp8cx.h:349
Operation completed without error.
Definition: vpx_codec.h:91
void vpx_img_free(vpx_image_t *img)
Close an image descriptor.
int num
Definition: vpx_encoder.h:260
#define VPX_DL_GOOD_QUALITY
Definition: vpx_encoder.h:914
Provides definitions for using VP8 or VP9 encoder algorithm within the vpx Codec Interface.
#define vpx_codec_enc_init(ctx, iface, cfg, flags)
Convenience macro for vpx_codec_enc_init_ver()
Definition: vpx_encoder.h:813
vpx_codec_err_t
Algorithm return codes.
Definition: vpx_codec.h:89
const vpx_codec_cx_pkt_t * vpx_codec_get_cx_data(vpx_codec_ctx_t *ctx, vpx_codec_iter_t *iter)
Encoded data iterator.
union vpx_codec_cx_pkt::@1 data
vpx_codec_err_t vpx_codec_enc_config_default(vpx_codec_iface_t *iface, vpx_codec_enc_cfg_t *cfg, unsigned int reserved)
Get a default configuration.
vpx_codec_err_t vpx_codec_control_(vpx_codec_ctx_t *ctx, int ctrl_id,...)
Control algorithm.
vpx_codec_err_t vpx_codec_destroy(vpx_codec_ctx_t *ctx)
Destroy a codec instance.
#define VPX_FRAME_IS_KEY
Definition: vpx_encoder.h:130
const void * vpx_codec_iter_t
Iterator.
Definition: vpx_codec.h:188
Definition: vpx_encoder.h:176
Codec context structure.
Definition: vpx_codec.h:199