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 <math.h> 18 #include <stdarg.h> 19 #include <stdlib.h> 20 #include <string.h> 21 #include <time.h> 22 23 #include "../args.h" 24 #include "../tools_common.h" 25 #include "../video_writer.h" 26 27 #include "../vpx_ports/vpx_timer.h" 28 #include "vpx/svc_context.h" 29 #include "vpx/vp8cx.h" 30 #include "vpx/vpx_encoder.h" 31 #include "../vpxstats.h" 32 #include "vp9/encoder/vp9_encoder.h" 33 #define OUTPUT_RC_STATS 1 34 35 static const arg_def_t skip_frames_arg = 36 ARG_DEF("s", "skip-frames", 1, "input frames to skip"); 37 static const arg_def_t frames_arg = 38 ARG_DEF("f", "frames", 1, "number of frames to encode"); 39 static const arg_def_t threads_arg = 40 ARG_DEF("th", "threads", 1, "number of threads to use"); 41 #if OUTPUT_RC_STATS 42 static const arg_def_t output_rc_stats_arg = 43 ARG_DEF("rcstat", "output_rc_stats", 1, "output rc stats"); 44 #endif 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 spatial_layers_arg = 52 ARG_DEF("sl", "spatial-layers", 1, "number of spatial SVC layers"); 53 static const arg_def_t temporal_layers_arg = 54 ARG_DEF("tl", "temporal-layers", 1, "number of temporal SVC layers"); 55 static const arg_def_t temporal_layering_mode_arg = 56 ARG_DEF("tlm", "temporal-layering-mode", 1, 57 "temporal layering scheme." 58 "VP9E_TEMPORAL_LAYERING_MODE"); 59 static const arg_def_t kf_dist_arg = 60 ARG_DEF("k", "kf-dist", 1, "number of frames between keyframes"); 61 static const arg_def_t scale_factors_arg = 62 ARG_DEF("r", "scale-factors", 1, "scale factors (lowest to highest layer)"); 63 static const arg_def_t passes_arg = 64 ARG_DEF("p", "passes", 1, "Number of passes (1/2)"); 65 static const arg_def_t pass_arg = 66 ARG_DEF(NULL, "pass", 1, "Pass to execute (1/2)"); 67 static const arg_def_t fpf_name_arg = 68 ARG_DEF(NULL, "fpf", 1, "First pass statistics file name"); 69 static const arg_def_t min_q_arg = 70 ARG_DEF(NULL, "min-q", 1, "Minimum quantizer"); 71 static const arg_def_t max_q_arg = 72 ARG_DEF(NULL, "max-q", 1, "Maximum quantizer"); 73 static const arg_def_t min_bitrate_arg = 74 ARG_DEF(NULL, "min-bitrate", 1, "Minimum bitrate"); 75 static const arg_def_t max_bitrate_arg = 76 ARG_DEF(NULL, "max-bitrate", 1, "Maximum bitrate"); 77 static const arg_def_t lag_in_frame_arg = 78 ARG_DEF(NULL, "lag-in-frames", 1, 79 "Number of frame to input before " 80 "generating any outputs"); 81 static const arg_def_t rc_end_usage_arg = 82 ARG_DEF(NULL, "rc-end-usage", 1, "0 - 3: VBR, CBR, CQ, Q"); 83 static const arg_def_t speed_arg = 84 ARG_DEF("sp", "speed", 1, "speed configuration"); 85 static const arg_def_t aqmode_arg = 86 ARG_DEF("aq", "aqmode", 1, "aq-mode off/on"); 87 static const arg_def_t bitrates_arg = 88 ARG_DEF("bl", "bitrates", 1, "bitrates[sl * num_tl + tl]"); 89 90 #if CONFIG_VP9_HIGHBITDEPTH 91 static const struct arg_enum_list bitdepth_enum[] = { 92 { "8", VPX_BITS_8 }, { "10", VPX_BITS_10 }, { "12", VPX_BITS_12 }, { NULL, 0 } 93 }; 94 95 static const arg_def_t bitdepth_arg = ARG_DEF_ENUM( 96 "d", "bit-depth", 1, "Bit depth for codec 8, 10 or 12. ", bitdepth_enum); 97 #endif // CONFIG_VP9_HIGHBITDEPTH 98 99 static const arg_def_t *svc_args[] = { &frames_arg, 100 &width_arg, 101 &height_arg, 102 &timebase_arg, 103 &bitrate_arg, 104 &skip_frames_arg, 105 &spatial_layers_arg, 106 &kf_dist_arg, 107 &scale_factors_arg, 108 &passes_arg, 109 &pass_arg, 110 &fpf_name_arg, 111 &min_q_arg, 112 &max_q_arg, 113 &min_bitrate_arg, 114 &max_bitrate_arg, 115 &temporal_layers_arg, 116 &temporal_layering_mode_arg, 117 &lag_in_frame_arg, 118 &threads_arg, 119 &aqmode_arg, 120 #if OUTPUT_RC_STATS 121 &output_rc_stats_arg, 122 #endif 123 124 #if CONFIG_VP9_HIGHBITDEPTH 125 &bitdepth_arg, 126 #endif 127 &speed_arg, 128 &rc_end_usage_arg, 129 &bitrates_arg, 130 NULL }; 131 132 static const uint32_t default_frames_to_skip = 0; 133 static const uint32_t default_frames_to_code = 60 * 60; 134 static const uint32_t default_width = 1920; 135 static const uint32_t default_height = 1080; 136 static const uint32_t default_timebase_num = 1; 137 static const uint32_t default_timebase_den = 60; 138 static const uint32_t default_bitrate = 1000; 139 static const uint32_t default_spatial_layers = 5; 140 static const uint32_t default_temporal_layers = 1; 141 static const uint32_t default_kf_dist = 100; 142 static const uint32_t default_temporal_layering_mode = 0; 143 static const uint32_t default_output_rc_stats = 0; 144 static const int32_t default_speed = -1; // -1 means use library default. 145 static const uint32_t default_threads = 0; // zero means use library default. 146 147 typedef struct { 148 const char *input_filename; 149 const char *output_filename; 150 uint32_t frames_to_code; 151 uint32_t frames_to_skip; 152 struct VpxInputContext input_ctx; 153 stats_io_t rc_stats; 154 int passes; 155 int pass; 156 } AppInput; 157 158 static const char *exec_name; 159 160 void usage_exit(void) { 161 fprintf(stderr, "Usage: %s <options> input_filename output_filename\n", 162 exec_name); 163 fprintf(stderr, "Options:\n"); 164 arg_show_usage(stderr, svc_args); 165 exit(EXIT_FAILURE); 166 } 167 168 static void parse_command_line(int argc, const char **argv_, 169 AppInput *app_input, SvcContext *svc_ctx, 170 vpx_codec_enc_cfg_t *enc_cfg) { 171 struct arg arg; 172 char **argv = NULL; 173 char **argi = NULL; 174 char **argj = NULL; 175 vpx_codec_err_t res; 176 int passes = 0; 177 int pass = 0; 178 const char *fpf_file_name = NULL; 179 unsigned int min_bitrate = 0; 180 unsigned int max_bitrate = 0; 181 char string_options[1024] = { 0 }; 182 183 // initialize SvcContext with parameters that will be passed to vpx_svc_init 184 svc_ctx->log_level = SVC_LOG_DEBUG; 185 svc_ctx->spatial_layers = default_spatial_layers; 186 svc_ctx->temporal_layers = default_temporal_layers; 187 svc_ctx->temporal_layering_mode = default_temporal_layering_mode; 188 #if OUTPUT_RC_STATS 189 svc_ctx->output_rc_stat = default_output_rc_stats; 190 #endif 191 svc_ctx->speed = default_speed; 192 svc_ctx->threads = default_threads; 193 194 // start with default encoder configuration 195 res = vpx_codec_enc_config_default(vpx_codec_vp9_cx(), enc_cfg, 0); 196 if (res) { 197 die("Failed to get config: %s\n", vpx_codec_err_to_string(res)); 198 } 199 // update enc_cfg with app default values 200 enc_cfg->g_w = default_width; 201 enc_cfg->g_h = default_height; 202 enc_cfg->g_timebase.num = default_timebase_num; 203 enc_cfg->g_timebase.den = default_timebase_den; 204 enc_cfg->rc_target_bitrate = default_bitrate; 205 enc_cfg->kf_min_dist = default_kf_dist; 206 enc_cfg->kf_max_dist = default_kf_dist; 207 enc_cfg->rc_end_usage = VPX_CQ; 208 209 // initialize AppInput with default values 210 app_input->frames_to_code = default_frames_to_code; 211 app_input->frames_to_skip = default_frames_to_skip; 212 213 // process command line options 214 argv = argv_dup(argc - 1, argv_ + 1); 215 for (argi = argj = argv; (*argj = *argi); argi += arg.argv_step) { 216 arg.argv_step = 1; 217 218 if (arg_match(&arg, &frames_arg, argi)) { 219 app_input->frames_to_code = arg_parse_uint(&arg); 220 } else if (arg_match(&arg, &width_arg, argi)) { 221 enc_cfg->g_w = arg_parse_uint(&arg); 222 } else if (arg_match(&arg, &height_arg, argi)) { 223 enc_cfg->g_h = arg_parse_uint(&arg); 224 } else if (arg_match(&arg, &timebase_arg, argi)) { 225 enc_cfg->g_timebase = arg_parse_rational(&arg); 226 } else if (arg_match(&arg, &bitrate_arg, argi)) { 227 enc_cfg->rc_target_bitrate = arg_parse_uint(&arg); 228 } else if (arg_match(&arg, &skip_frames_arg, argi)) { 229 app_input->frames_to_skip = arg_parse_uint(&arg); 230 } else if (arg_match(&arg, &spatial_layers_arg, argi)) { 231 svc_ctx->spatial_layers = arg_parse_uint(&arg); 232 } else if (arg_match(&arg, &temporal_layers_arg, argi)) { 233 svc_ctx->temporal_layers = arg_parse_uint(&arg); 234 #if OUTPUT_RC_STATS 235 } else if (arg_match(&arg, &output_rc_stats_arg, argi)) { 236 svc_ctx->output_rc_stat = arg_parse_uint(&arg); 237 #endif 238 } else if (arg_match(&arg, &speed_arg, argi)) { 239 svc_ctx->speed = arg_parse_uint(&arg); 240 } else if (arg_match(&arg, &aqmode_arg, argi)) { 241 svc_ctx->aqmode = arg_parse_uint(&arg); 242 } else if (arg_match(&arg, &threads_arg, argi)) { 243 svc_ctx->threads = arg_parse_uint(&arg); 244 } else if (arg_match(&arg, &temporal_layering_mode_arg, argi)) { 245 svc_ctx->temporal_layering_mode = enc_cfg->temporal_layering_mode = 246 arg_parse_int(&arg); 247 if (svc_ctx->temporal_layering_mode) { 248 enc_cfg->g_error_resilient = 1; 249 } 250 } else if (arg_match(&arg, &kf_dist_arg, argi)) { 251 enc_cfg->kf_min_dist = arg_parse_uint(&arg); 252 enc_cfg->kf_max_dist = enc_cfg->kf_min_dist; 253 } else if (arg_match(&arg, &scale_factors_arg, argi)) { 254 snprintf(string_options, sizeof(string_options), "%s scale-factors=%s", 255 string_options, arg.val); 256 } else if (arg_match(&arg, &bitrates_arg, argi)) { 257 snprintf(string_options, sizeof(string_options), "%s bitrates=%s", 258 string_options, arg.val); 259 } else if (arg_match(&arg, &passes_arg, argi)) { 260 passes = arg_parse_uint(&arg); 261 if (passes < 1 || passes > 2) { 262 die("Error: Invalid number of passes (%d)\n", passes); 263 } 264 } else if (arg_match(&arg, &pass_arg, argi)) { 265 pass = arg_parse_uint(&arg); 266 if (pass < 1 || pass > 2) { 267 die("Error: Invalid pass selected (%d)\n", pass); 268 } 269 } else if (arg_match(&arg, &fpf_name_arg, argi)) { 270 fpf_file_name = arg.val; 271 } else if (arg_match(&arg, &min_q_arg, argi)) { 272 snprintf(string_options, sizeof(string_options), "%s min-quantizers=%s", 273 string_options, arg.val); 274 } else if (arg_match(&arg, &max_q_arg, argi)) { 275 snprintf(string_options, sizeof(string_options), "%s max-quantizers=%s", 276 string_options, arg.val); 277 } else if (arg_match(&arg, &min_bitrate_arg, argi)) { 278 min_bitrate = arg_parse_uint(&arg); 279 } else if (arg_match(&arg, &max_bitrate_arg, argi)) { 280 max_bitrate = arg_parse_uint(&arg); 281 } else if (arg_match(&arg, &lag_in_frame_arg, argi)) { 282 enc_cfg->g_lag_in_frames = arg_parse_uint(&arg); 283 } else if (arg_match(&arg, &rc_end_usage_arg, argi)) { 284 enc_cfg->rc_end_usage = arg_parse_uint(&arg); 285 #if CONFIG_VP9_HIGHBITDEPTH 286 } else if (arg_match(&arg, &bitdepth_arg, argi)) { 287 enc_cfg->g_bit_depth = arg_parse_enum_or_int(&arg); 288 switch (enc_cfg->g_bit_depth) { 289 case VPX_BITS_8: 290 enc_cfg->g_input_bit_depth = 8; 291 enc_cfg->g_profile = 0; 292 break; 293 case VPX_BITS_10: 294 enc_cfg->g_input_bit_depth = 10; 295 enc_cfg->g_profile = 2; 296 break; 297 case VPX_BITS_12: 298 enc_cfg->g_input_bit_depth = 12; 299 enc_cfg->g_profile = 2; 300 break; 301 default: 302 die("Error: Invalid bit depth selected (%d)\n", enc_cfg->g_bit_depth); 303 break; 304 } 305 #endif // CONFIG_VP9_HIGHBITDEPTH 306 } else { 307 ++argj; 308 } 309 } 310 311 // There will be a space in front of the string options 312 if (strlen(string_options) > 0) 313 vpx_svc_set_options(svc_ctx, string_options + 1); 314 315 if (passes == 0 || passes == 1) { 316 if (pass) { 317 fprintf(stderr, "pass is ignored since there's only one pass\n"); 318 } 319 enc_cfg->g_pass = VPX_RC_ONE_PASS; 320 } else { 321 if (pass == 0) { 322 die("pass must be specified when passes is 2\n"); 323 } 324 325 if (fpf_file_name == NULL) { 326 die("fpf must be specified when passes is 2\n"); 327 } 328 329 if (pass == 1) { 330 enc_cfg->g_pass = VPX_RC_FIRST_PASS; 331 if (!stats_open_file(&app_input->rc_stats, fpf_file_name, 0)) { 332 fatal("Failed to open statistics store"); 333 } 334 } else { 335 enc_cfg->g_pass = VPX_RC_LAST_PASS; 336 if (!stats_open_file(&app_input->rc_stats, fpf_file_name, 1)) { 337 fatal("Failed to open statistics store"); 338 } 339 enc_cfg->rc_twopass_stats_in = stats_get(&app_input->rc_stats); 340 } 341 app_input->passes = passes; 342 app_input->pass = pass; 343 } 344 345 if (enc_cfg->rc_target_bitrate > 0) { 346 if (min_bitrate > 0) { 347 enc_cfg->rc_2pass_vbr_minsection_pct = 348 min_bitrate * 100 / enc_cfg->rc_target_bitrate; 349 } 350 if (max_bitrate > 0) { 351 enc_cfg->rc_2pass_vbr_maxsection_pct = 352 max_bitrate * 100 / enc_cfg->rc_target_bitrate; 353 } 354 } 355 356 // Check for unrecognized options 357 for (argi = argv; *argi; ++argi) 358 if (argi[0][0] == '-' && strlen(argi[0]) > 1) 359 die("Error: Unrecognized option %s\n", *argi); 360 361 if (argv[0] == NULL || argv[1] == 0) { 362 usage_exit(); 363 } 364 app_input->input_filename = argv[0]; 365 app_input->output_filename = argv[1]; 366 free(argv); 367 368 if (enc_cfg->g_w < 16 || enc_cfg->g_w % 2 || enc_cfg->g_h < 16 || 369 enc_cfg->g_h % 2) 370 die("Invalid resolution: %d x %d\n", enc_cfg->g_w, enc_cfg->g_h); 371 372 printf( 373 "Codec %s\nframes: %d, skip: %d\n" 374 "layers: %d\n" 375 "width %d, height: %d,\n" 376 "num: %d, den: %d, bitrate: %d,\n" 377 "gop size: %d\n", 378 vpx_codec_iface_name(vpx_codec_vp9_cx()), app_input->frames_to_code, 379 app_input->frames_to_skip, svc_ctx->spatial_layers, enc_cfg->g_w, 380 enc_cfg->g_h, enc_cfg->g_timebase.num, enc_cfg->g_timebase.den, 381 enc_cfg->rc_target_bitrate, enc_cfg->kf_max_dist); 382 } 383 384 #if OUTPUT_RC_STATS 385 // For rate control encoding stats. 386 struct RateControlStats { 387 // Number of input frames per layer. 388 int layer_input_frames[VPX_MAX_LAYERS]; 389 // Total (cumulative) number of encoded frames per layer. 390 int layer_tot_enc_frames[VPX_MAX_LAYERS]; 391 // Number of encoded non-key frames per layer. 392 int layer_enc_frames[VPX_MAX_LAYERS]; 393 // Framerate per layer (cumulative). 394 double layer_framerate[VPX_MAX_LAYERS]; 395 // Target average frame size per layer (per-frame-bandwidth per layer). 396 double layer_pfb[VPX_MAX_LAYERS]; 397 // Actual average frame size per layer. 398 double layer_avg_frame_size[VPX_MAX_LAYERS]; 399 // Average rate mismatch per layer (|target - actual| / target). 400 double layer_avg_rate_mismatch[VPX_MAX_LAYERS]; 401 // Actual encoding bitrate per layer (cumulative). 402 double layer_encoding_bitrate[VPX_MAX_LAYERS]; 403 // Average of the short-time encoder actual bitrate. 404 // TODO(marpan): Should we add these short-time stats for each layer? 405 double avg_st_encoding_bitrate; 406 // Variance of the short-time encoder actual bitrate. 407 double variance_st_encoding_bitrate; 408 // Window (number of frames) for computing short-time encoding bitrate. 409 int window_size; 410 // Number of window measurements. 411 int window_count; 412 }; 413 414 // Note: these rate control stats assume only 1 key frame in the 415 // sequence (i.e., first frame only). 416 static void set_rate_control_stats(struct RateControlStats *rc, 417 vpx_codec_enc_cfg_t *cfg) { 418 unsigned int sl, tl; 419 // Set the layer (cumulative) framerate and the target layer (non-cumulative) 420 // per-frame-bandwidth, for the rate control encoding stats below. 421 const double framerate = cfg->g_timebase.den / cfg->g_timebase.num; 422 423 for (sl = 0; sl < cfg->ss_number_layers; ++sl) { 424 for (tl = 0; tl < cfg->ts_number_layers; ++tl) { 425 const int layer = sl * cfg->ts_number_layers + tl; 426 if (cfg->ts_number_layers == 1) 427 rc->layer_framerate[layer] = framerate; 428 else 429 rc->layer_framerate[layer] = framerate / cfg->ts_rate_decimator[tl]; 430 if (tl > 0) { 431 rc->layer_pfb[layer] = 432 1000.0 * (cfg->layer_target_bitrate[layer] - 433 cfg->layer_target_bitrate[layer - 1]) / 434 (rc->layer_framerate[layer] - rc->layer_framerate[layer - 1]); 435 } else { 436 rc->layer_pfb[layer] = 1000.0 * cfg->layer_target_bitrate[layer] / 437 rc->layer_framerate[layer]; 438 } 439 rc->layer_input_frames[layer] = 0; 440 rc->layer_enc_frames[layer] = 0; 441 rc->layer_tot_enc_frames[layer] = 0; 442 rc->layer_encoding_bitrate[layer] = 0.0; 443 rc->layer_avg_frame_size[layer] = 0.0; 444 rc->layer_avg_rate_mismatch[layer] = 0.0; 445 } 446 } 447 rc->window_count = 0; 448 rc->window_size = 15; 449 rc->avg_st_encoding_bitrate = 0.0; 450 rc->variance_st_encoding_bitrate = 0.0; 451 } 452 453 static void printout_rate_control_summary(struct RateControlStats *rc, 454 vpx_codec_enc_cfg_t *cfg, 455 int frame_cnt) { 456 unsigned int sl, tl; 457 double perc_fluctuation = 0.0; 458 int tot_num_frames = 0; 459 printf("Total number of processed frames: %d\n\n", frame_cnt - 1); 460 printf("Rate control layer stats for sl%d tl%d layer(s):\n\n", 461 cfg->ss_number_layers, cfg->ts_number_layers); 462 for (sl = 0; sl < cfg->ss_number_layers; ++sl) { 463 tot_num_frames = 0; 464 for (tl = 0; tl < cfg->ts_number_layers; ++tl) { 465 const int layer = sl * cfg->ts_number_layers + tl; 466 const int num_dropped = 467 (tl > 0) 468 ? (rc->layer_input_frames[layer] - rc->layer_enc_frames[layer]) 469 : (rc->layer_input_frames[layer] - rc->layer_enc_frames[layer] - 470 1); 471 tot_num_frames += rc->layer_input_frames[layer]; 472 rc->layer_encoding_bitrate[layer] = 0.001 * rc->layer_framerate[layer] * 473 rc->layer_encoding_bitrate[layer] / 474 tot_num_frames; 475 rc->layer_avg_frame_size[layer] = 476 rc->layer_avg_frame_size[layer] / rc->layer_enc_frames[layer]; 477 rc->layer_avg_rate_mismatch[layer] = 100.0 * 478 rc->layer_avg_rate_mismatch[layer] / 479 rc->layer_enc_frames[layer]; 480 printf("For layer#: sl%d tl%d \n", sl, tl); 481 printf("Bitrate (target vs actual): %d %f.0 kbps\n", 482 cfg->layer_target_bitrate[layer], 483 rc->layer_encoding_bitrate[layer]); 484 printf("Average frame size (target vs actual): %f %f bits\n", 485 rc->layer_pfb[layer], rc->layer_avg_frame_size[layer]); 486 printf("Average rate_mismatch: %f\n", rc->layer_avg_rate_mismatch[layer]); 487 printf( 488 "Number of input frames, encoded (non-key) frames, " 489 "and percent dropped frames: %d %d %f.0 \n", 490 rc->layer_input_frames[layer], rc->layer_enc_frames[layer], 491 100.0 * num_dropped / rc->layer_input_frames[layer]); 492 printf("\n"); 493 } 494 } 495 rc->avg_st_encoding_bitrate = rc->avg_st_encoding_bitrate / rc->window_count; 496 rc->variance_st_encoding_bitrate = 497 rc->variance_st_encoding_bitrate / rc->window_count - 498 (rc->avg_st_encoding_bitrate * rc->avg_st_encoding_bitrate); 499 perc_fluctuation = 100.0 * sqrt(rc->variance_st_encoding_bitrate) / 500 rc->avg_st_encoding_bitrate; 501 printf("Short-time stats, for window of %d frames: \n", rc->window_size); 502 printf("Average, rms-variance, and percent-fluct: %f %f %f \n", 503 rc->avg_st_encoding_bitrate, sqrt(rc->variance_st_encoding_bitrate), 504 perc_fluctuation); 505 if (frame_cnt != tot_num_frames) 506 die("Error: Number of input frames not equal to output encoded frames != " 507 "%d tot_num_frames = %d\n", 508 frame_cnt, tot_num_frames); 509 } 510 511 vpx_codec_err_t parse_superframe_index(const uint8_t *data, size_t data_sz, 512 uint64_t sizes[8], int *count) { 513 // A chunk ending with a byte matching 0xc0 is an invalid chunk unless 514 // it is a super frame index. If the last byte of real video compression 515 // data is 0xc0 the encoder must add a 0 byte. If we have the marker but 516 // not the associated matching marker byte at the front of the index we have 517 // an invalid bitstream and need to return an error. 518 519 uint8_t marker; 520 521 marker = *(data + data_sz - 1); 522 *count = 0; 523 524 if ((marker & 0xe0) == 0xc0) { 525 const uint32_t frames = (marker & 0x7) + 1; 526 const uint32_t mag = ((marker >> 3) & 0x3) + 1; 527 const size_t index_sz = 2 + mag * frames; 528 529 // This chunk is marked as having a superframe index but doesn't have 530 // enough data for it, thus it's an invalid superframe index. 531 if (data_sz < index_sz) return VPX_CODEC_CORRUPT_FRAME; 532 533 { 534 const uint8_t marker2 = *(data + data_sz - index_sz); 535 536 // This chunk is marked as having a superframe index but doesn't have 537 // the matching marker byte at the front of the index therefore it's an 538 // invalid chunk. 539 if (marker != marker2) return VPX_CODEC_CORRUPT_FRAME; 540 } 541 542 { 543 // Found a valid superframe index. 544 uint32_t i, j; 545 const uint8_t *x = &data[data_sz - index_sz + 1]; 546 547 for (i = 0; i < frames; ++i) { 548 uint32_t this_sz = 0; 549 550 for (j = 0; j < mag; ++j) this_sz |= (*x++) << (j * 8); 551 sizes[i] = this_sz; 552 } 553 *count = frames; 554 } 555 } 556 return VPX_CODEC_OK; 557 } 558 #endif 559 560 // Example pattern for spatial layers and 2 temporal layers used in the 561 // bypass/flexible mode. The pattern corresponds to the pattern 562 // VP9E_TEMPORAL_LAYERING_MODE_0101 (temporal_layering_mode == 2) used in 563 // non-flexible mode. 564 void set_frame_flags_bypass_mode(int sl, int tl, int num_spatial_layers, 565 int is_key_frame, 566 vpx_svc_ref_frame_config_t *ref_frame_config) { 567 for (sl = 0; sl < num_spatial_layers; ++sl) { 568 if (!tl) { 569 if (!sl) { 570 ref_frame_config->frame_flags[sl] = 571 VP8_EFLAG_NO_REF_GF | VP8_EFLAG_NO_REF_ARF | VP8_EFLAG_NO_UPD_GF | 572 VP8_EFLAG_NO_UPD_ARF; 573 } else { 574 if (is_key_frame) { 575 ref_frame_config->frame_flags[sl] = 576 VP8_EFLAG_NO_REF_LAST | VP8_EFLAG_NO_REF_ARF | 577 VP8_EFLAG_NO_UPD_GF | VP8_EFLAG_NO_UPD_ARF; 578 } else { 579 ref_frame_config->frame_flags[sl] = 580 VP8_EFLAG_NO_REF_ARF | VP8_EFLAG_NO_UPD_GF | VP8_EFLAG_NO_UPD_ARF; 581 } 582 } 583 } else if (tl == 1) { 584 if (!sl) { 585 ref_frame_config->frame_flags[sl] = 586 VP8_EFLAG_NO_REF_GF | VP8_EFLAG_NO_REF_ARF | VP8_EFLAG_NO_UPD_LAST | 587 VP8_EFLAG_NO_UPD_GF; 588 } else { 589 ref_frame_config->frame_flags[sl] = 590 VP8_EFLAG_NO_REF_ARF | VP8_EFLAG_NO_UPD_LAST | VP8_EFLAG_NO_UPD_GF; 591 } 592 } 593 if (tl == 0) { 594 ref_frame_config->lst_fb_idx[sl] = sl; 595 if (sl) 596 ref_frame_config->gld_fb_idx[sl] = sl - 1; 597 else 598 ref_frame_config->gld_fb_idx[sl] = 0; 599 ref_frame_config->alt_fb_idx[sl] = 0; 600 } else if (tl == 1) { 601 ref_frame_config->lst_fb_idx[sl] = sl; 602 ref_frame_config->gld_fb_idx[sl] = num_spatial_layers + sl - 1; 603 ref_frame_config->alt_fb_idx[sl] = num_spatial_layers + sl; 604 } 605 } 606 } 607 608 int main(int argc, const char **argv) { 609 AppInput app_input; 610 VpxVideoWriter *writer = NULL; 611 VpxVideoInfo info; 612 vpx_codec_ctx_t codec; 613 vpx_codec_enc_cfg_t enc_cfg; 614 SvcContext svc_ctx; 615 uint32_t i; 616 uint32_t frame_cnt = 0; 617 vpx_image_t raw; 618 vpx_codec_err_t res; 619 int pts = 0; /* PTS starts at 0 */ 620 int frame_duration = 1; /* 1 timebase tick per frame */ 621 FILE *infile = NULL; 622 int end_of_stream = 0; 623 int frames_received = 0; 624 #if OUTPUT_RC_STATS 625 VpxVideoWriter *outfile[VPX_TS_MAX_LAYERS] = { NULL }; 626 struct RateControlStats rc; 627 vpx_svc_layer_id_t layer_id; 628 vpx_svc_ref_frame_config_t ref_frame_config; 629 unsigned int sl, tl; 630 double sum_bitrate = 0.0; 631 double sum_bitrate2 = 0.0; 632 double framerate = 30.0; 633 #endif 634 struct vpx_usec_timer timer; 635 int64_t cx_time = 0; 636 memset(&svc_ctx, 0, sizeof(svc_ctx)); 637 svc_ctx.log_print = 1; 638 exec_name = argv[0]; 639 parse_command_line(argc, argv, &app_input, &svc_ctx, &enc_cfg); 640 641 // Allocate image buffer 642 #if CONFIG_VP9_HIGHBITDEPTH 643 if (!vpx_img_alloc(&raw, 644 enc_cfg.g_input_bit_depth == 8 ? VPX_IMG_FMT_I420 645 : VPX_IMG_FMT_I42016, 646 enc_cfg.g_w, enc_cfg.g_h, 32)) { 647 die("Failed to allocate image %dx%d\n", enc_cfg.g_w, enc_cfg.g_h); 648 } 649 #else 650 if (!vpx_img_alloc(&raw, VPX_IMG_FMT_I420, enc_cfg.g_w, enc_cfg.g_h, 32)) { 651 die("Failed to allocate image %dx%d\n", enc_cfg.g_w, enc_cfg.g_h); 652 } 653 #endif // CONFIG_VP9_HIGHBITDEPTH 654 655 if (!(infile = fopen(app_input.input_filename, "rb"))) 656 die("Failed to open %s for reading\n", app_input.input_filename); 657 658 // Initialize codec 659 if (vpx_svc_init(&svc_ctx, &codec, vpx_codec_vp9_cx(), &enc_cfg) != 660 VPX_CODEC_OK) 661 die("Failed to initialize encoder\n"); 662 663 #if OUTPUT_RC_STATS 664 if (svc_ctx.output_rc_stat) { 665 set_rate_control_stats(&rc, &enc_cfg); 666 framerate = enc_cfg.g_timebase.den / enc_cfg.g_timebase.num; 667 } 668 #endif 669 670 info.codec_fourcc = VP9_FOURCC; 671 info.time_base.numerator = enc_cfg.g_timebase.num; 672 info.time_base.denominator = enc_cfg.g_timebase.den; 673 674 if (!(app_input.passes == 2 && app_input.pass == 1)) { 675 // We don't save the bitstream for the 1st pass on two pass rate control 676 writer = 677 vpx_video_writer_open(app_input.output_filename, kContainerIVF, &info); 678 if (!writer) 679 die("Failed to open %s for writing\n", app_input.output_filename); 680 } 681 #if OUTPUT_RC_STATS 682 // For now, just write temporal layer streams. 683 // TODO(marpan): do spatial by re-writing superframe. 684 if (svc_ctx.output_rc_stat) { 685 for (tl = 0; tl < enc_cfg.ts_number_layers; ++tl) { 686 char file_name[PATH_MAX]; 687 688 snprintf(file_name, sizeof(file_name), "%s_t%d.ivf", 689 app_input.output_filename, tl); 690 outfile[tl] = vpx_video_writer_open(file_name, kContainerIVF, &info); 691 if (!outfile[tl]) die("Failed to open %s for writing", file_name); 692 } 693 } 694 #endif 695 696 // skip initial frames 697 for (i = 0; i < app_input.frames_to_skip; ++i) vpx_img_read(&raw, infile); 698 699 if (svc_ctx.speed != -1) 700 vpx_codec_control(&codec, VP8E_SET_CPUUSED, svc_ctx.speed); 701 if (svc_ctx.threads) { 702 vpx_codec_control(&codec, VP9E_SET_TILE_COLUMNS, (svc_ctx.threads >> 1)); 703 if (svc_ctx.threads > 1) 704 vpx_codec_control(&codec, VP9E_SET_ROW_MT, 1); 705 else 706 vpx_codec_control(&codec, VP9E_SET_ROW_MT, 0); 707 } 708 if (svc_ctx.speed >= 5 && svc_ctx.aqmode == 1) 709 vpx_codec_control(&codec, VP9E_SET_AQ_MODE, 3); 710 if (svc_ctx.speed >= 5) 711 vpx_codec_control(&codec, VP8E_SET_STATIC_THRESHOLD, 1); 712 vpx_codec_control(&codec, VP8E_SET_MAX_INTRA_BITRATE_PCT, 900); 713 714 // Encode frames 715 while (!end_of_stream) { 716 vpx_codec_iter_t iter = NULL; 717 const vpx_codec_cx_pkt_t *cx_pkt; 718 if (frame_cnt >= app_input.frames_to_code || !vpx_img_read(&raw, infile)) { 719 // We need one extra vpx_svc_encode call at end of stream to flush 720 // encoder and get remaining data 721 end_of_stream = 1; 722 } 723 724 // For BYPASS/FLEXIBLE mode, set the frame flags (reference and updates) 725 // and the buffer indices for each spatial layer of the current 726 // (super)frame to be encoded. The temporal layer_id for the current frame 727 // also needs to be set. 728 // TODO(marpan): Should rename the "VP9E_TEMPORAL_LAYERING_MODE_BYPASS" 729 // mode to "VP9E_LAYERING_MODE_BYPASS". 730 if (svc_ctx.temporal_layering_mode == VP9E_TEMPORAL_LAYERING_MODE_BYPASS) { 731 layer_id.spatial_layer_id = 0; 732 // Example for 2 temporal layers. 733 if (frame_cnt % 2 == 0) 734 layer_id.temporal_layer_id = 0; 735 else 736 layer_id.temporal_layer_id = 1; 737 // Note that we only set the temporal layer_id, since we are calling 738 // the encode for the whole superframe. The encoder will internally loop 739 // over all the spatial layers for the current superframe. 740 vpx_codec_control(&codec, VP9E_SET_SVC_LAYER_ID, &layer_id); 741 set_frame_flags_bypass_mode(sl, layer_id.temporal_layer_id, 742 svc_ctx.spatial_layers, frame_cnt == 0, 743 &ref_frame_config); 744 vpx_codec_control(&codec, VP9E_SET_SVC_REF_FRAME_CONFIG, 745 &ref_frame_config); 746 // Keep track of input frames, to account for frame drops in rate control 747 // stats/metrics. 748 for (sl = 0; sl < (unsigned int)enc_cfg.ss_number_layers; ++sl) { 749 ++rc.layer_input_frames[sl * enc_cfg.ts_number_layers + 750 layer_id.temporal_layer_id]; 751 } 752 } 753 754 vpx_usec_timer_start(&timer); 755 res = vpx_svc_encode( 756 &svc_ctx, &codec, (end_of_stream ? NULL : &raw), pts, frame_duration, 757 svc_ctx.speed >= 5 ? VPX_DL_REALTIME : VPX_DL_GOOD_QUALITY); 758 vpx_usec_timer_mark(&timer); 759 cx_time += vpx_usec_timer_elapsed(&timer); 760 761 printf("%s", vpx_svc_get_message(&svc_ctx)); 762 fflush(stdout); 763 if (res != VPX_CODEC_OK) { 764 die_codec(&codec, "Failed to encode frame"); 765 } 766 767 while ((cx_pkt = vpx_codec_get_cx_data(&codec, &iter)) != NULL) { 768 switch (cx_pkt->kind) { 769 case VPX_CODEC_CX_FRAME_PKT: { 770 SvcInternal_t *const si = (SvcInternal_t *)svc_ctx.internal; 771 if (cx_pkt->data.frame.sz > 0) { 772 #if OUTPUT_RC_STATS 773 uint64_t sizes[8]; 774 int count = 0; 775 #endif 776 vpx_video_writer_write_frame(writer, cx_pkt->data.frame.buf, 777 cx_pkt->data.frame.sz, 778 cx_pkt->data.frame.pts); 779 #if OUTPUT_RC_STATS 780 // TODO(marpan): Put this (to line728) in separate function. 781 if (svc_ctx.output_rc_stat) { 782 vpx_codec_control(&codec, VP9E_GET_SVC_LAYER_ID, &layer_id); 783 parse_superframe_index(cx_pkt->data.frame.buf, 784 cx_pkt->data.frame.sz, sizes, &count); 785 if (enc_cfg.ss_number_layers == 1) 786 sizes[0] = cx_pkt->data.frame.sz; 787 // Note computing input_layer_frames here won't account for frame 788 // drops in rate control stats. 789 // TODO(marpan): Fix this for non-bypass mode so we can get stats 790 // for dropped frames. 791 if (svc_ctx.temporal_layering_mode != 792 VP9E_TEMPORAL_LAYERING_MODE_BYPASS) { 793 for (sl = 0; sl < enc_cfg.ss_number_layers; ++sl) { 794 ++rc.layer_input_frames[sl * enc_cfg.ts_number_layers + 795 layer_id.temporal_layer_id]; 796 } 797 } 798 for (tl = layer_id.temporal_layer_id; 799 tl < enc_cfg.ts_number_layers; ++tl) { 800 vpx_video_writer_write_frame( 801 outfile[tl], cx_pkt->data.frame.buf, cx_pkt->data.frame.sz, 802 cx_pkt->data.frame.pts); 803 } 804 805 for (sl = 0; sl < enc_cfg.ss_number_layers; ++sl) { 806 for (tl = layer_id.temporal_layer_id; 807 tl < enc_cfg.ts_number_layers; ++tl) { 808 const int layer = sl * enc_cfg.ts_number_layers + tl; 809 ++rc.layer_tot_enc_frames[layer]; 810 rc.layer_encoding_bitrate[layer] += 8.0 * sizes[sl]; 811 // Keep count of rate control stats per layer, for non-key 812 // frames. 813 if (tl == (unsigned int)layer_id.temporal_layer_id && 814 !(cx_pkt->data.frame.flags & VPX_FRAME_IS_KEY)) { 815 rc.layer_avg_frame_size[layer] += 8.0 * sizes[sl]; 816 rc.layer_avg_rate_mismatch[layer] += 817 fabs(8.0 * sizes[sl] - rc.layer_pfb[layer]) / 818 rc.layer_pfb[layer]; 819 ++rc.layer_enc_frames[layer]; 820 } 821 } 822 } 823 824 // Update for short-time encoding bitrate states, for moving 825 // window of size rc->window, shifted by rc->window / 2. 826 // Ignore first window segment, due to key frame. 827 if (frame_cnt > (unsigned int)rc.window_size) { 828 tl = layer_id.temporal_layer_id; 829 for (sl = 0; sl < enc_cfg.ss_number_layers; ++sl) { 830 sum_bitrate += 0.001 * 8.0 * sizes[sl] * framerate; 831 } 832 if (frame_cnt % rc.window_size == 0) { 833 rc.window_count += 1; 834 rc.avg_st_encoding_bitrate += sum_bitrate / rc.window_size; 835 rc.variance_st_encoding_bitrate += 836 (sum_bitrate / rc.window_size) * 837 (sum_bitrate / rc.window_size); 838 sum_bitrate = 0.0; 839 } 840 } 841 842 // Second shifted window. 843 if (frame_cnt > 844 (unsigned int)(rc.window_size + rc.window_size / 2)) { 845 tl = layer_id.temporal_layer_id; 846 for (sl = 0; sl < enc_cfg.ss_number_layers; ++sl) { 847 sum_bitrate2 += 0.001 * 8.0 * sizes[sl] * framerate; 848 } 849 850 if (frame_cnt > (unsigned int)(2 * rc.window_size) && 851 frame_cnt % rc.window_size == 0) { 852 rc.window_count += 1; 853 rc.avg_st_encoding_bitrate += sum_bitrate2 / rc.window_size; 854 rc.variance_st_encoding_bitrate += 855 (sum_bitrate2 / rc.window_size) * 856 (sum_bitrate2 / rc.window_size); 857 sum_bitrate2 = 0.0; 858 } 859 } 860 } 861 #endif 862 } 863 /* 864 printf("SVC frame: %d, kf: %d, size: %d, pts: %d\n", frames_received, 865 !!(cx_pkt->data.frame.flags & VPX_FRAME_IS_KEY), 866 (int)cx_pkt->data.frame.sz, (int)cx_pkt->data.frame.pts); 867 */ 868 if (enc_cfg.ss_number_layers == 1 && enc_cfg.ts_number_layers == 1) 869 si->bytes_sum[0] += (int)cx_pkt->data.frame.sz; 870 ++frames_received; 871 break; 872 } 873 case VPX_CODEC_STATS_PKT: { 874 stats_write(&app_input.rc_stats, cx_pkt->data.twopass_stats.buf, 875 cx_pkt->data.twopass_stats.sz); 876 break; 877 } 878 default: { break; } 879 } 880 } 881 882 if (!end_of_stream) { 883 ++frame_cnt; 884 pts += frame_duration; 885 } 886 } 887 888 // Compensate for the extra frame count for the bypass mode. 889 if (svc_ctx.temporal_layering_mode == VP9E_TEMPORAL_LAYERING_MODE_BYPASS) { 890 for (sl = 0; sl < enc_cfg.ss_number_layers; ++sl) { 891 const int layer = 892 sl * enc_cfg.ts_number_layers + layer_id.temporal_layer_id; 893 --rc.layer_input_frames[layer]; 894 } 895 } 896 897 printf("Processed %d frames\n", frame_cnt); 898 fclose(infile); 899 #if OUTPUT_RC_STATS 900 if (svc_ctx.output_rc_stat) { 901 printout_rate_control_summary(&rc, &enc_cfg, frame_cnt); 902 printf("\n"); 903 } 904 #endif 905 if (vpx_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec"); 906 if (app_input.passes == 2) stats_close(&app_input.rc_stats, 1); 907 if (writer) { 908 vpx_video_writer_close(writer); 909 } 910 #if OUTPUT_RC_STATS 911 if (svc_ctx.output_rc_stat) { 912 for (tl = 0; tl < enc_cfg.ts_number_layers; ++tl) { 913 vpx_video_writer_close(outfile[tl]); 914 } 915 } 916 #endif 917 printf("Frame cnt and encoding time/FPS stats for encoding: %d %f %f \n", 918 frame_cnt, 1000 * (float)cx_time / (double)(frame_cnt * 1000000), 919 1000000 * (double)frame_cnt / (double)cx_time); 920 vpx_img_free(&raw); 921 // display average size, psnr 922 printf("%s", vpx_svc_dump_statistics(&svc_ctx)); 923 vpx_svc_release(&svc_ctx); 924 return EXIT_SUCCESS; 925 } 926
