1 /* 2 * Copyright (c) 2012 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 /* 12 * This is an example demonstrating how to implement a multi-layer 13 * VP9 encoding scheme based on spatial scalability for video applications 14 * that benefit from a scalable bitstream. 15 */ 16 17 #include <stdarg.h> 18 #include <stdlib.h> 19 #include <string.h> 20 #include <time.h> 21 22 #include "./args.h" 23 #include "./tools_common.h" 24 #include "./video_writer.h" 25 26 #include "vpx/svc_context.h" 27 #include "vpx/vp8cx.h" 28 #include "vpx/vpx_encoder.h" 29 #include "./vpxstats.h" 30 31 static const struct arg_enum_list encoding_mode_enum[] = { 32 {"i", INTER_LAYER_PREDICTION_I}, 33 {"alt-ip", ALT_INTER_LAYER_PREDICTION_IP}, 34 {"ip", INTER_LAYER_PREDICTION_IP}, 35 {"gf", USE_GOLDEN_FRAME}, 36 {NULL, 0} 37 }; 38 39 static const arg_def_t encoding_mode_arg = ARG_DEF_ENUM( 40 "m", "encoding-mode", 1, "Encoding mode algorithm", encoding_mode_enum); 41 static const arg_def_t skip_frames_arg = 42 ARG_DEF("s", "skip-frames", 1, "input frames to skip"); 43 static const arg_def_t frames_arg = 44 ARG_DEF("f", "frames", 1, "number of frames to encode"); 45 static const arg_def_t width_arg = ARG_DEF("w", "width", 1, "source width"); 46 static const arg_def_t height_arg = ARG_DEF("h", "height", 1, "source height"); 47 static const arg_def_t timebase_arg = 48 ARG_DEF("t", "timebase", 1, "timebase (num/den)"); 49 static const arg_def_t bitrate_arg = ARG_DEF( 50 "b", "target-bitrate", 1, "encoding bitrate, in kilobits per second"); 51 static const arg_def_t layers_arg = 52 ARG_DEF("l", "layers", 1, "number of SVC layers"); 53 static const arg_def_t kf_dist_arg = 54 ARG_DEF("k", "kf-dist", 1, "number of frames between keyframes"); 55 static const arg_def_t scale_factors_arg = 56 ARG_DEF("r", "scale-factors", 1, "scale factors (lowest to highest layer)"); 57 static const arg_def_t quantizers_arg = 58 ARG_DEF("q", "quantizers", 1, "quantizers for non key frames, also will " 59 "be applied to key frames if -qn is not specified (lowest to " 60 "highest layer)"); 61 static const arg_def_t quantizers_keyframe_arg = 62 ARG_DEF("qn", "quantizers-keyframe", 1, "quantizers for key frames (lowest " 63 "to highest layer)"); 64 static const arg_def_t passes_arg = 65 ARG_DEF("p", "passes", 1, "Number of passes (1/2)"); 66 static const arg_def_t pass_arg = 67 ARG_DEF(NULL, "pass", 1, "Pass to execute (1/2)"); 68 static const arg_def_t fpf_name_arg = 69 ARG_DEF(NULL, "fpf", 1, "First pass statistics file name"); 70 static const arg_def_t min_q_arg = 71 ARG_DEF(NULL, "min-q", 1, "Minimum quantizer"); 72 static const arg_def_t max_q_arg = 73 ARG_DEF(NULL, "max-q", 1, "Maximum quantizer"); 74 static const arg_def_t min_bitrate_arg = 75 ARG_DEF(NULL, "min-bitrate", 1, "Minimum bitrate"); 76 static const arg_def_t max_bitrate_arg = 77 ARG_DEF(NULL, "max-bitrate", 1, "Maximum bitrate"); 78 79 static const arg_def_t *svc_args[] = { 80 &encoding_mode_arg, &frames_arg, &width_arg, &height_arg, 81 &timebase_arg, &bitrate_arg, &skip_frames_arg, &layers_arg, 82 &kf_dist_arg, &scale_factors_arg, &quantizers_arg, 83 &quantizers_keyframe_arg, &passes_arg, &pass_arg, 84 &fpf_name_arg, &min_q_arg, &max_q_arg, &min_bitrate_arg, 85 &max_bitrate_arg, NULL 86 }; 87 88 static const SVC_ENCODING_MODE default_encoding_mode = 89 INTER_LAYER_PREDICTION_IP; 90 static const uint32_t default_frames_to_skip = 0; 91 static const uint32_t default_frames_to_code = 60 * 60; 92 static const uint32_t default_width = 1920; 93 static const uint32_t default_height = 1080; 94 static const uint32_t default_timebase_num = 1; 95 static const uint32_t default_timebase_den = 60; 96 static const uint32_t default_bitrate = 1000; 97 static const uint32_t default_spatial_layers = 5; 98 static const uint32_t default_kf_dist = 100; 99 100 typedef struct { 101 const char *input_filename; 102 const char *output_filename; 103 uint32_t frames_to_code; 104 uint32_t frames_to_skip; 105 struct VpxInputContext input_ctx; 106 stats_io_t rc_stats; 107 int passes; 108 int pass; 109 } AppInput; 110 111 static const char *exec_name; 112 113 void usage_exit() { 114 fprintf(stderr, "Usage: %s <options> input_filename output_filename\n", 115 exec_name); 116 fprintf(stderr, "Options:\n"); 117 arg_show_usage(stderr, svc_args); 118 exit(EXIT_FAILURE); 119 } 120 121 static void parse_command_line(int argc, const char **argv_, 122 AppInput *app_input, SvcContext *svc_ctx, 123 vpx_codec_enc_cfg_t *enc_cfg) { 124 struct arg arg = {0}; 125 char **argv = NULL; 126 char **argi = NULL; 127 char **argj = NULL; 128 vpx_codec_err_t res; 129 int passes = 0; 130 int pass = 0; 131 const char *fpf_file_name = NULL; 132 unsigned int min_bitrate = 0; 133 unsigned int max_bitrate = 0; 134 135 // initialize SvcContext with parameters that will be passed to vpx_svc_init 136 svc_ctx->log_level = SVC_LOG_DEBUG; 137 svc_ctx->spatial_layers = default_spatial_layers; 138 svc_ctx->encoding_mode = default_encoding_mode; 139 140 // start with default encoder configuration 141 res = vpx_codec_enc_config_default(vpx_codec_vp9_cx(), enc_cfg, 0); 142 if (res) { 143 die("Failed to get config: %s\n", vpx_codec_err_to_string(res)); 144 } 145 // update enc_cfg with app default values 146 enc_cfg->g_w = default_width; 147 enc_cfg->g_h = default_height; 148 enc_cfg->g_timebase.num = default_timebase_num; 149 enc_cfg->g_timebase.den = default_timebase_den; 150 enc_cfg->rc_target_bitrate = default_bitrate; 151 enc_cfg->kf_min_dist = default_kf_dist; 152 enc_cfg->kf_max_dist = default_kf_dist; 153 154 // initialize AppInput with default values 155 app_input->frames_to_code = default_frames_to_code; 156 app_input->frames_to_skip = default_frames_to_skip; 157 158 // process command line options 159 argv = argv_dup(argc - 1, argv_ + 1); 160 for (argi = argj = argv; (*argj = *argi); argi += arg.argv_step) { 161 arg.argv_step = 1; 162 163 if (arg_match(&arg, &encoding_mode_arg, argi)) { 164 svc_ctx->encoding_mode = arg_parse_enum_or_int(&arg); 165 } else if (arg_match(&arg, &frames_arg, argi)) { 166 app_input->frames_to_code = arg_parse_uint(&arg); 167 } else if (arg_match(&arg, &width_arg, argi)) { 168 enc_cfg->g_w = arg_parse_uint(&arg); 169 } else if (arg_match(&arg, &height_arg, argi)) { 170 enc_cfg->g_h = arg_parse_uint(&arg); 171 } else if (arg_match(&arg, &timebase_arg, argi)) { 172 enc_cfg->g_timebase = arg_parse_rational(&arg); 173 } else if (arg_match(&arg, &bitrate_arg, argi)) { 174 enc_cfg->rc_target_bitrate = arg_parse_uint(&arg); 175 } else if (arg_match(&arg, &skip_frames_arg, argi)) { 176 app_input->frames_to_skip = arg_parse_uint(&arg); 177 } else if (arg_match(&arg, &layers_arg, argi)) { 178 svc_ctx->spatial_layers = arg_parse_uint(&arg); 179 } else if (arg_match(&arg, &kf_dist_arg, argi)) { 180 enc_cfg->kf_min_dist = arg_parse_uint(&arg); 181 enc_cfg->kf_max_dist = enc_cfg->kf_min_dist; 182 } else if (arg_match(&arg, &scale_factors_arg, argi)) { 183 vpx_svc_set_scale_factors(svc_ctx, arg.val); 184 } else if (arg_match(&arg, &quantizers_arg, argi)) { 185 vpx_svc_set_quantizers(svc_ctx, arg.val, 0); 186 } else if (arg_match(&arg, &quantizers_keyframe_arg, argi)) { 187 vpx_svc_set_quantizers(svc_ctx, arg.val, 1); 188 } else if (arg_match(&arg, &passes_arg, argi)) { 189 passes = arg_parse_uint(&arg); 190 if (passes < 1 || passes > 2) { 191 die("Error: Invalid number of passes (%d)\n", passes); 192 } 193 } else if (arg_match(&arg, &pass_arg, argi)) { 194 pass = arg_parse_uint(&arg); 195 if (pass < 1 || pass > 2) { 196 die("Error: Invalid pass selected (%d)\n", pass); 197 } 198 } else if (arg_match(&arg, &fpf_name_arg, argi)) { 199 fpf_file_name = arg.val; 200 } else if (arg_match(&arg, &min_q_arg, argi)) { 201 enc_cfg->rc_min_quantizer = arg_parse_uint(&arg); 202 } else if (arg_match(&arg, &max_q_arg, argi)) { 203 enc_cfg->rc_max_quantizer = arg_parse_uint(&arg); 204 } else if (arg_match(&arg, &min_bitrate_arg, argi)) { 205 min_bitrate = arg_parse_uint(&arg); 206 } else if (arg_match(&arg, &max_bitrate_arg, argi)) { 207 max_bitrate = arg_parse_uint(&arg); 208 } else { 209 ++argj; 210 } 211 } 212 213 if (passes == 0 || passes == 1) { 214 if (pass) { 215 fprintf(stderr, "pass is ignored since there's only one pass\n"); 216 } 217 enc_cfg->g_pass = VPX_RC_ONE_PASS; 218 } else { 219 if (pass == 0) { 220 die("pass must be specified when passes is 2\n"); 221 } 222 223 if (fpf_file_name == NULL) { 224 die("fpf must be specified when passes is 2\n"); 225 } 226 227 if (pass == 1) { 228 enc_cfg->g_pass = VPX_RC_FIRST_PASS; 229 if (!stats_open_file(&app_input->rc_stats, fpf_file_name, 0)) { 230 fatal("Failed to open statistics store"); 231 } 232 } else { 233 enc_cfg->g_pass = VPX_RC_LAST_PASS; 234 if (!stats_open_file(&app_input->rc_stats, fpf_file_name, 1)) { 235 fatal("Failed to open statistics store"); 236 } 237 enc_cfg->rc_twopass_stats_in = stats_get(&app_input->rc_stats); 238 } 239 app_input->passes = passes; 240 app_input->pass = pass; 241 } 242 243 if (enc_cfg->rc_target_bitrate > 0) { 244 if (min_bitrate > 0) { 245 enc_cfg->rc_2pass_vbr_minsection_pct = 246 min_bitrate * 100 / enc_cfg->rc_target_bitrate; 247 } 248 if (max_bitrate > 0) { 249 enc_cfg->rc_2pass_vbr_maxsection_pct = 250 max_bitrate * 100 / enc_cfg->rc_target_bitrate; 251 } 252 } 253 254 // Check for unrecognized options 255 for (argi = argv; *argi; ++argi) 256 if (argi[0][0] == '-' && strlen(argi[0]) > 1) 257 die("Error: Unrecognized option %s\n", *argi); 258 259 if (argv[0] == NULL || argv[1] == 0) { 260 usage_exit(); 261 } 262 app_input->input_filename = argv[0]; 263 app_input->output_filename = argv[1]; 264 free(argv); 265 266 if (enc_cfg->g_w < 16 || enc_cfg->g_w % 2 || enc_cfg->g_h < 16 || 267 enc_cfg->g_h % 2) 268 die("Invalid resolution: %d x %d\n", enc_cfg->g_w, enc_cfg->g_h); 269 270 printf( 271 "Codec %s\nframes: %d, skip: %d\n" 272 "mode: %d, layers: %d\n" 273 "width %d, height: %d,\n" 274 "num: %d, den: %d, bitrate: %d,\n" 275 "gop size: %d\n", 276 vpx_codec_iface_name(vpx_codec_vp9_cx()), app_input->frames_to_code, 277 app_input->frames_to_skip, svc_ctx->encoding_mode, 278 svc_ctx->spatial_layers, enc_cfg->g_w, enc_cfg->g_h, 279 enc_cfg->g_timebase.num, enc_cfg->g_timebase.den, 280 enc_cfg->rc_target_bitrate, enc_cfg->kf_max_dist); 281 } 282 283 int main(int argc, const char **argv) { 284 AppInput app_input = {0}; 285 VpxVideoWriter *writer = NULL; 286 VpxVideoInfo info = {0}; 287 vpx_codec_ctx_t codec; 288 vpx_codec_enc_cfg_t enc_cfg; 289 SvcContext svc_ctx; 290 uint32_t i; 291 uint32_t frame_cnt = 0; 292 vpx_image_t raw; 293 vpx_codec_err_t res; 294 int pts = 0; /* PTS starts at 0 */ 295 int frame_duration = 1; /* 1 timebase tick per frame */ 296 FILE *infile = NULL; 297 int end_of_stream = 0; 298 299 memset(&svc_ctx, 0, sizeof(svc_ctx)); 300 svc_ctx.log_print = 1; 301 exec_name = argv[0]; 302 parse_command_line(argc, argv, &app_input, &svc_ctx, &enc_cfg); 303 304 // Allocate image buffer 305 if (!vpx_img_alloc(&raw, VPX_IMG_FMT_I420, enc_cfg.g_w, enc_cfg.g_h, 32)) 306 die("Failed to allocate image %dx%d\n", enc_cfg.g_w, enc_cfg.g_h); 307 308 if (!(infile = fopen(app_input.input_filename, "rb"))) 309 die("Failed to open %s for reading\n", app_input.input_filename); 310 311 // Initialize codec 312 if (vpx_svc_init(&svc_ctx, &codec, vpx_codec_vp9_cx(), &enc_cfg) != 313 VPX_CODEC_OK) 314 die("Failed to initialize encoder\n"); 315 316 info.codec_fourcc = VP9_FOURCC; 317 info.time_base.numerator = enc_cfg.g_timebase.num; 318 info.time_base.denominator = enc_cfg.g_timebase.den; 319 if (vpx_svc_get_layer_resolution(&svc_ctx, svc_ctx.spatial_layers - 1, 320 (unsigned int *)&info.frame_width, 321 (unsigned int *)&info.frame_height) != 322 VPX_CODEC_OK) { 323 die("Failed to get output resolution"); 324 } 325 326 if (!(app_input.passes == 2 && app_input.pass == 1)) { 327 // We don't save the bitstream for the 1st pass on two pass rate control 328 writer = vpx_video_writer_open(app_input.output_filename, kContainerIVF, 329 &info); 330 if (!writer) 331 die("Failed to open %s for writing\n", app_input.output_filename); 332 } 333 334 // skip initial frames 335 for (i = 0; i < app_input.frames_to_skip; ++i) 336 vpx_img_read(&raw, infile); 337 338 // Encode frames 339 while (!end_of_stream) { 340 if (frame_cnt >= app_input.frames_to_code || !vpx_img_read(&raw, infile)) { 341 // We need one extra vpx_svc_encode call at end of stream to flush 342 // encoder and get remaining data 343 end_of_stream = 1; 344 } 345 346 res = vpx_svc_encode(&svc_ctx, &codec, (end_of_stream ? NULL : &raw), 347 pts, frame_duration, VPX_DL_REALTIME); 348 printf("%s", vpx_svc_get_message(&svc_ctx)); 349 if (res != VPX_CODEC_OK) { 350 die_codec(&codec, "Failed to encode frame"); 351 } 352 if (!(app_input.passes == 2 && app_input.pass == 1)) { 353 if (vpx_svc_get_frame_size(&svc_ctx) > 0) { 354 vpx_video_writer_write_frame(writer, 355 vpx_svc_get_buffer(&svc_ctx), 356 vpx_svc_get_frame_size(&svc_ctx), 357 pts); 358 } 359 } 360 if (vpx_svc_get_rc_stats_buffer_size(&svc_ctx) > 0) { 361 stats_write(&app_input.rc_stats, 362 vpx_svc_get_rc_stats_buffer(&svc_ctx), 363 vpx_svc_get_rc_stats_buffer_size(&svc_ctx)); 364 } 365 if (!end_of_stream) { 366 ++frame_cnt; 367 pts += frame_duration; 368 } 369 } 370 371 printf("Processed %d frames\n", frame_cnt); 372 373 fclose(infile); 374 if (vpx_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec"); 375 376 if (app_input.passes == 2) 377 stats_close(&app_input.rc_stats, 1); 378 379 if (writer) { 380 vpx_video_writer_close(writer); 381 } 382 383 vpx_img_free(&raw); 384 385 // display average size, psnr 386 printf("%s", vpx_svc_dump_statistics(&svc_ctx)); 387 388 vpx_svc_release(&svc_ctx); 389 390 return EXIT_SUCCESS; 391 } 392
