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
21static const char *exec_name;
22
23void 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
30static 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
62int main(int argc, char **argv) {
63  FILE *infile = NULL;
64  vpx_codec_ctx_t codec;
65  vpx_codec_enc_cfg_t cfg;
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}
145