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annotate mrjunejune/generate_hls_sample.c @ 255:5ec271d612ae

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[dowa] Enforce arena ownership Co-authored-by: Copilot <[email protected]>
author MrJuneJune <me@mrjunejune.com>
date Tue, 04 Aug 2026 15:12:18 -0700
parents 543df0fe7168
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 #include "third_party/ffmpeg/ffmpeg_cli.h"
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2
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3 #include <dirent.h>
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4 #include <errno.h>
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5 #include <stdio.h>
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6 #include <stdlib.h>
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7 #include <string.h>
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8 #include <sys/stat.h>
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9 #include <unistd.h>
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10
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11 static int remove_flat_directory(const char *directory)
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12 {
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13 DIR *entries = opendir(directory);
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14 if (!entries)
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15 return errno == ENOENT ? 0 : -1;
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16
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17 struct dirent *entry;
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18 while ((entry = readdir(entries)) != NULL)
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19 {
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20 if (strcmp(entry->d_name, ".") == 0 ||
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21 strcmp(entry->d_name, "..") == 0)
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22 continue;
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23 char path[1024];
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24 int length = snprintf(path, sizeof(path), "%s/%s", directory, entry->d_name);
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25 if (length < 0 || (size_t)length >= sizeof(path) || unlink(path) != 0)
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26 {
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27 closedir(entries);
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28 return -1;
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29 }
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30 }
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31 closedir(entries);
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32 return rmdir(directory);
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33 }
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34
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35 static int write_master_playlist(const char *directory)
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36 {
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37 char path[1024];
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38 int length = snprintf(path, sizeof(path), "%s/master.m3u8", directory);
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39 if (length < 0 || (size_t)length >= sizeof(path))
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40 return -1;
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41
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42 FILE *playlist = fopen(path, "wb");
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43 if (!playlist)
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44 return -1;
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45 const char *content =
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46 "#EXTM3U\n"
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47 "#EXT-X-VERSION:7\n"
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48 "#EXT-X-STREAM-INF:BANDWIDTH=1200000,AVERAGE-BANDWIDTH=1000000,"
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49 "CODECS=\"avc1.4d401f,mp4a.40.2\"\n"
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50 "h264-stream.m3u8\n"
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51 "#EXT-X-STREAM-INF:BANDWIDTH=900000,AVERAGE-BANDWIDTH=750000,"
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52 "CODECS=\"vp09.00.10.08,opus\"\n"
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53 "vp9-stream.m3u8\n";
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54 size_t content_length = strlen(content);
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55 int result = fwrite(content, 1, content_length, playlist) == content_length
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56 ? 0
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57 : -1;
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58 fclose(playlist);
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59 return result;
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60 }
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61
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62 static const char *workspace_path(
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63 const char *path,
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64 char *buffer,
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65 size_t buffer_size)
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66 {
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67 const char *workspace = getenv("BUILD_WORKSPACE_DIRECTORY");
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68 if (!workspace || path[0] == '/')
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69 return path;
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70 int length = snprintf(buffer, buffer_size, "%s/%s", workspace, path);
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71 return length < 0 || (size_t)length >= buffer_size ? NULL : buffer;
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72 }
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73
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74 int main(int argc, char **argv)
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75 {
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76 if (argc != 3)
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77 {
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78 fprintf(stderr, "Usage: %s <input.mp4> <output-directory>\n", argv[0]);
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79 return 2;
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80 }
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81
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82 char final_buffer[1024];
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83 const char *final_directory = workspace_path(
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84 argv[2],
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85 final_buffer,
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86 sizeof(final_buffer));
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87 if (!final_directory)
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88 {
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89 fprintf(stderr, "HLS output path is too long.\n");
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90 return 1;
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91 }
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92
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93 char stage_template[1100];
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94 int stage_length = snprintf(
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95 stage_template,
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96 sizeof(stage_template),
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97 "%s.stage-XXXXXX",
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98 final_directory);
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99 if (stage_length < 0 || (size_t)stage_length >= sizeof(stage_template) ||
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100 !mkdtemp(stage_template))
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101 {
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102 fprintf(stderr, "Unable to create the HLS staging directory.\n");
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103 return 1;
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104 }
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105
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106 Fmp4HlsOpts options = ffmpeg_fmp4_hls_opts_default();
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107 options.codec = FFMPEG_HLS_VP9_OPUS;
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108 FfmpegResult result = ffmpeg_video_to_fmp4_hls(
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109 argv[1],
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110 stage_template,
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111 "vp9",
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112 &options);
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113 if (result == FFMPEG_OK)
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114 {
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115 options.codec = FFMPEG_HLS_H264_AAC;
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116 options.video_bitrate = 1200;
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117 options.audio_bitrate = 128;
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118 result = ffmpeg_video_to_fmp4_hls(
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119 argv[1],
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120 stage_template,
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121 "h264",
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122 &options);
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123 }
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124 if (result == FFMPEG_OK)
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125 {
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126 options.use_mpeg_ts = true;
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127 result = ffmpeg_video_to_fmp4_hls(
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128 argv[1],
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129 stage_template,
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130 "h264-ts",
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131 &options);
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132 }
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133 if (result != FFMPEG_OK || write_master_playlist(stage_template) != 0)
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134 {
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135 fprintf(stderr, "%s\n", ffmpeg_last_error());
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136 remove_flat_directory(stage_template);
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137 return 1;
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138 }
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139
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140 char backup_directory[1100];
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141 int backup_length = snprintf(
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142 backup_directory,
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143 sizeof(backup_directory),
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144 "%s.backup",
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145 final_directory);
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146 if (backup_length < 0 || (size_t)backup_length >= sizeof(backup_directory))
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147 {
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148 remove_flat_directory(stage_template);
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149 return 1;
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150 }
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151 remove_flat_directory(backup_directory);
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152
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153 bool had_previous = rename(final_directory, backup_directory) == 0;
543df0fe7168 [tools] Add full HLS player support
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154 if (!had_previous && errno != ENOENT)
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155 {
543df0fe7168 [tools] Add full HLS player support
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156 remove_flat_directory(stage_template);
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157 return 1;
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158 }
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159 if (rename(stage_template, final_directory) != 0)
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160 {
543df0fe7168 [tools] Add full HLS player support
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161 if (had_previous)
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162 rename(backup_directory, final_directory);
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163 remove_flat_directory(stage_template);
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164 return 1;
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165 }
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166 if (had_previous && remove_flat_directory(backup_directory) != 0)
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167 {
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168 fprintf(stderr, "Generated HLS sample, but could not remove its backup.\n");
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169 return 1;
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170 }
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171
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172 printf("Generated fMP4 and MPEG-TS HLS samples from %s in %s\n", argv[1], final_directory);
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173 return 0;
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174 }