1 /* 2 * Copyright (c) 2010 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 multi-resolution encoding in VP8. 13 * High-resolution input video is down-sampled to lower-resolutions. The 14 * encoder then encodes the video and outputs multiple bitstreams with 15 * different resolutions. 16 */ 17 #include <stdio.h> 18 #include <stdlib.h> 19 #include <stdarg.h> 20 #include <string.h> 21 #include <math.h> 22 #define VPX_CODEC_DISABLE_COMPAT 1 23 #include "vpx/vpx_encoder.h" 24 #include "vpx/vp8cx.h" 25 #include "vpx_ports/mem_ops.h" 26 #include "./tools_common.h" 27 #define interface (vpx_codec_vp8_cx()) 28 #define fourcc 0x30385056 29 30 #define IVF_FILE_HDR_SZ (32) 31 #define IVF_FRAME_HDR_SZ (12) 32 33 /* 34 * The input video frame is downsampled several times to generate a multi-level 35 * hierarchical structure. NUM_ENCODERS is defined as the number of encoding 36 * levels required. For example, if the size of input video is 1280x720, 37 * NUM_ENCODERS is 3, and down-sampling factor is 2, the encoder outputs 3 38 * bitstreams with resolution of 1280x720(level 0), 640x360(level 1), and 39 * 320x180(level 2) respectively. 40 */ 41 #define NUM_ENCODERS 3 42 43 /* This example uses the scaler function in libyuv. */ 44 #include "third_party/libyuv/include/libyuv/basic_types.h" 45 #include "third_party/libyuv/include/libyuv/scale.h" 46 #include "third_party/libyuv/include/libyuv/cpu_id.h" 47 48 static void die(const char *fmt, ...) { 49 va_list ap; 50 51 va_start(ap, fmt); 52 vprintf(fmt, ap); 53 if(fmt[strlen(fmt)-1] != '\n') 54 printf("\n"); 55 exit(EXIT_FAILURE); 56 } 57 58 static void die_codec(vpx_codec_ctx_t *ctx, const char *s) { 59 const char *detail = vpx_codec_error_detail(ctx); 60 61 printf("%s: %s\n", s, vpx_codec_error(ctx)); 62 if(detail) 63 printf(" %s\n",detail); 64 exit(EXIT_FAILURE); 65 } 66 67 int (*read_frame_p)(FILE *f, vpx_image_t *img); 68 69 static int read_frame(FILE *f, vpx_image_t *img) { 70 size_t nbytes, to_read; 71 int res = 1; 72 73 to_read = img->w*img->h*3/2; 74 nbytes = fread(img->planes[0], 1, to_read, f); 75 if(nbytes != to_read) { 76 res = 0; 77 if(nbytes > 0) 78 printf("Warning: Read partial frame. Check your width & height!\n"); 79 } 80 return res; 81 } 82 83 static int read_frame_by_row(FILE *f, vpx_image_t *img) { 84 size_t nbytes, to_read; 85 int res = 1; 86 int plane; 87 88 for (plane = 0; plane < 3; plane++) 89 { 90 unsigned char *ptr; 91 int w = (plane ? (1 + img->d_w) / 2 : img->d_w); 92 int h = (plane ? (1 + img->d_h) / 2 : img->d_h); 93 int r; 94 95 /* Determine the correct plane based on the image format. The for-loop 96 * always counts in Y,U,V order, but this may not match the order of 97 * the data on disk. 98 */ 99 switch (plane) 100 { 101 case 1: 102 ptr = img->planes[img->fmt==VPX_IMG_FMT_YV12? VPX_PLANE_V : VPX_PLANE_U]; 103 break; 104 case 2: 105 ptr = img->planes[img->fmt==VPX_IMG_FMT_YV12?VPX_PLANE_U : VPX_PLANE_V]; 106 break; 107 default: 108 ptr = img->planes[plane]; 109 } 110 111 for (r = 0; r < h; r++) 112 { 113 to_read = w; 114 115 nbytes = fread(ptr, 1, to_read, f); 116 if(nbytes != to_read) { 117 res = 0; 118 if(nbytes > 0) 119 printf("Warning: Read partial frame. Check your width & height!\n"); 120 break; 121 } 122 123 ptr += img->stride[plane]; 124 } 125 if (!res) 126 break; 127 } 128 129 return res; 130 } 131 132 static void write_ivf_file_header(FILE *outfile, 133 const vpx_codec_enc_cfg_t *cfg, 134 int frame_cnt) { 135 char header[32]; 136 137 if(cfg->g_pass != VPX_RC_ONE_PASS && cfg->g_pass != VPX_RC_LAST_PASS) 138 return; 139 header[0] = 'D'; 140 header[1] = 'K'; 141 header[2] = 'I'; 142 header[3] = 'F'; 143 mem_put_le16(header+4, 0); /* version */ 144 mem_put_le16(header+6, 32); /* headersize */ 145 mem_put_le32(header+8, fourcc); /* headersize */ 146 mem_put_le16(header+12, cfg->g_w); /* width */ 147 mem_put_le16(header+14, cfg->g_h); /* height */ 148 mem_put_le32(header+16, cfg->g_timebase.den); /* rate */ 149 mem_put_le32(header+20, cfg->g_timebase.num); /* scale */ 150 mem_put_le32(header+24, frame_cnt); /* length */ 151 mem_put_le32(header+28, 0); /* unused */ 152 153 (void) fwrite(header, 1, 32, outfile); 154 } 155 156 static void write_ivf_frame_header(FILE *outfile, 157 const vpx_codec_cx_pkt_t *pkt) 158 { 159 char header[12]; 160 vpx_codec_pts_t pts; 161 162 if(pkt->kind != VPX_CODEC_CX_FRAME_PKT) 163 return; 164 165 pts = pkt->data.frame.pts; 166 mem_put_le32(header, pkt->data.frame.sz); 167 mem_put_le32(header+4, pts&0xFFFFFFFF); 168 mem_put_le32(header+8, pts >> 32); 169 170 (void) fwrite(header, 1, 12, outfile); 171 } 172 173 int main(int argc, char **argv) 174 { 175 FILE *infile, *outfile[NUM_ENCODERS]; 176 vpx_codec_ctx_t codec[NUM_ENCODERS]; 177 vpx_codec_enc_cfg_t cfg[NUM_ENCODERS]; 178 vpx_codec_pts_t frame_cnt = 0; 179 vpx_image_t raw[NUM_ENCODERS]; 180 vpx_codec_err_t res[NUM_ENCODERS]; 181 182 int i; 183 long width; 184 long height; 185 int frame_avail; 186 int got_data; 187 int flags = 0; 188 189 /*Currently, only realtime mode is supported in multi-resolution encoding.*/ 190 int arg_deadline = VPX_DL_REALTIME; 191 192 /* Set show_psnr to 1/0 to show/not show PSNR. Choose show_psnr=0 if you 193 don't need to know PSNR, which will skip PSNR calculation and save 194 encoding time. */ 195 int show_psnr = 0; 196 uint64_t psnr_sse_total[NUM_ENCODERS] = {0}; 197 uint64_t psnr_samples_total[NUM_ENCODERS] = {0}; 198 double psnr_totals[NUM_ENCODERS][4] = {{0,0}}; 199 int psnr_count[NUM_ENCODERS] = {0}; 200 201 /* Set the required target bitrates for each resolution level. 202 * If target bitrate for highest-resolution level is set to 0, 203 * (i.e. target_bitrate[0]=0), we skip encoding at that level. 204 */ 205 unsigned int target_bitrate[NUM_ENCODERS]={1000, 500, 100}; 206 /* Enter the frame rate of the input video */ 207 int framerate = 30; 208 /* Set down-sampling factor for each resolution level. 209 dsf[0] controls down sampling from level 0 to level 1; 210 dsf[1] controls down sampling from level 1 to level 2; 211 dsf[2] is not used. */ 212 vpx_rational_t dsf[NUM_ENCODERS] = {{2, 1}, {2, 1}, {1, 1}}; 213 214 if(argc!= (5+NUM_ENCODERS)) 215 die("Usage: %s <width> <height> <infile> <outfile(s)> <output psnr?>\n", 216 argv[0]); 217 218 printf("Using %s\n",vpx_codec_iface_name(interface)); 219 220 width = strtol(argv[1], NULL, 0); 221 height = strtol(argv[2], NULL, 0); 222 223 if(width < 16 || width%2 || height <16 || height%2) 224 die("Invalid resolution: %ldx%ld", width, height); 225 226 /* Open input video file for encoding */ 227 if(!(infile = fopen(argv[3], "rb"))) 228 die("Failed to open %s for reading", argv[3]); 229 230 /* Open output file for each encoder to output bitstreams */ 231 for (i=0; i< NUM_ENCODERS; i++) 232 { 233 if(!target_bitrate[i]) 234 { 235 outfile[i] = NULL; 236 continue; 237 } 238 239 if(!(outfile[i] = fopen(argv[i+4], "wb"))) 240 die("Failed to open %s for writing", argv[i+4]); 241 } 242 243 show_psnr = strtol(argv[NUM_ENCODERS + 4], NULL, 0); 244 245 /* Populate default encoder configuration */ 246 for (i=0; i< NUM_ENCODERS; i++) 247 { 248 res[i] = vpx_codec_enc_config_default(interface, &cfg[i], 0); 249 if(res[i]) { 250 printf("Failed to get config: %s\n", vpx_codec_err_to_string(res[i])); 251 return EXIT_FAILURE; 252 } 253 } 254 255 /* 256 * Update the default configuration according to needs of the application. 257 */ 258 /* Highest-resolution encoder settings */ 259 cfg[0].g_w = width; 260 cfg[0].g_h = height; 261 cfg[0].g_threads = 1; /* number of threads used */ 262 cfg[0].rc_dropframe_thresh = 30; 263 cfg[0].rc_end_usage = VPX_CBR; 264 cfg[0].rc_resize_allowed = 0; 265 cfg[0].rc_min_quantizer = 4; 266 cfg[0].rc_max_quantizer = 56; 267 cfg[0].rc_undershoot_pct = 98; 268 cfg[0].rc_overshoot_pct = 100; 269 cfg[0].rc_buf_initial_sz = 500; 270 cfg[0].rc_buf_optimal_sz = 600; 271 cfg[0].rc_buf_sz = 1000; 272 cfg[0].g_error_resilient = 1; /* Enable error resilient mode */ 273 cfg[0].g_lag_in_frames = 0; 274 275 /* Disable automatic keyframe placement */ 276 /* Note: These 3 settings are copied to all levels. But, except the lowest 277 * resolution level, all other levels are set to VPX_KF_DISABLED internally. 278 */ 279 //cfg[0].kf_mode = VPX_KF_DISABLED; 280 cfg[0].kf_mode = VPX_KF_AUTO; 281 cfg[0].kf_min_dist = 3000; 282 cfg[0].kf_max_dist = 3000; 283 284 cfg[0].rc_target_bitrate = target_bitrate[0]; /* Set target bitrate */ 285 cfg[0].g_timebase.num = 1; /* Set fps */ 286 cfg[0].g_timebase.den = framerate; 287 288 /* Other-resolution encoder settings */ 289 for (i=1; i< NUM_ENCODERS; i++) 290 { 291 memcpy(&cfg[i], &cfg[0], sizeof(vpx_codec_enc_cfg_t)); 292 293 cfg[i].g_threads = 1; /* number of threads used */ 294 cfg[i].rc_target_bitrate = target_bitrate[i]; 295 296 /* Note: Width & height of other-resolution encoders are calculated 297 * from the highest-resolution encoder's size and the corresponding 298 * down_sampling_factor. 299 */ 300 { 301 unsigned int iw = cfg[i-1].g_w*dsf[i-1].den + dsf[i-1].num - 1; 302 unsigned int ih = cfg[i-1].g_h*dsf[i-1].den + dsf[i-1].num - 1; 303 cfg[i].g_w = iw/dsf[i-1].num; 304 cfg[i].g_h = ih/dsf[i-1].num; 305 } 306 307 /* Make width & height to be multiplier of 2. */ 308 // Should support odd size ??? 309 if((cfg[i].g_w)%2)cfg[i].g_w++; 310 if((cfg[i].g_h)%2)cfg[i].g_h++; 311 } 312 313 /* Allocate image for each encoder */ 314 for (i=0; i< NUM_ENCODERS; i++) 315 if(!vpx_img_alloc(&raw[i], VPX_IMG_FMT_I420, cfg[i].g_w, cfg[i].g_h, 32)) 316 die("Failed to allocate image", cfg[i].g_w, cfg[i].g_h); 317 318 if (raw[0].stride[VPX_PLANE_Y] == raw[0].d_w) 319 read_frame_p = read_frame; 320 else 321 read_frame_p = read_frame_by_row; 322 323 for (i=0; i< NUM_ENCODERS; i++) 324 if(outfile[i]) 325 write_ivf_file_header(outfile[i], &cfg[i], 0); 326 327 /* Initialize multi-encoder */ 328 if(vpx_codec_enc_init_multi(&codec[0], interface, &cfg[0], NUM_ENCODERS, 329 (show_psnr ? VPX_CODEC_USE_PSNR : 0), &dsf[0])) 330 die_codec(&codec[0], "Failed to initialize encoder"); 331 332 /* The extra encoding configuration parameters can be set as follows. */ 333 /* Set encoding speed */ 334 for ( i=0; i<NUM_ENCODERS; i++) 335 { 336 int speed = -6; 337 if(vpx_codec_control(&codec[i], VP8E_SET_CPUUSED, speed)) 338 die_codec(&codec[i], "Failed to set cpu_used"); 339 } 340 341 /* Set static threshold. */ 342 for ( i=0; i<NUM_ENCODERS; i++) 343 { 344 unsigned int static_thresh = 1; 345 if(vpx_codec_control(&codec[i], VP8E_SET_STATIC_THRESHOLD, static_thresh)) 346 die_codec(&codec[i], "Failed to set static threshold"); 347 } 348 349 /* Set NOISE_SENSITIVITY to do TEMPORAL_DENOISING */ 350 /* Enable denoising for the highest-resolution encoder. */ 351 if(vpx_codec_control(&codec[0], VP8E_SET_NOISE_SENSITIVITY, 1)) 352 die_codec(&codec[0], "Failed to set noise_sensitivity"); 353 for ( i=1; i< NUM_ENCODERS; i++) 354 { 355 if(vpx_codec_control(&codec[i], VP8E_SET_NOISE_SENSITIVITY, 0)) 356 die_codec(&codec[i], "Failed to set noise_sensitivity"); 357 } 358 359 360 frame_avail = 1; 361 got_data = 0; 362 363 while(frame_avail || got_data) 364 { 365 vpx_codec_iter_t iter[NUM_ENCODERS]={NULL}; 366 const vpx_codec_cx_pkt_t *pkt[NUM_ENCODERS]; 367 368 flags = 0; 369 frame_avail = read_frame_p(infile, &raw[0]); 370 371 if(frame_avail) 372 { 373 for ( i=1; i<NUM_ENCODERS; i++) 374 { 375 /*Scale the image down a number of times by downsampling factor*/ 376 /* FilterMode 1 or 2 give better psnr than FilterMode 0. */ 377 I420Scale(raw[i-1].planes[VPX_PLANE_Y], raw[i-1].stride[VPX_PLANE_Y], 378 raw[i-1].planes[VPX_PLANE_U], raw[i-1].stride[VPX_PLANE_U], 379 raw[i-1].planes[VPX_PLANE_V], raw[i-1].stride[VPX_PLANE_V], 380 raw[i-1].d_w, raw[i-1].d_h, 381 raw[i].planes[VPX_PLANE_Y], raw[i].stride[VPX_PLANE_Y], 382 raw[i].planes[VPX_PLANE_U], raw[i].stride[VPX_PLANE_U], 383 raw[i].planes[VPX_PLANE_V], raw[i].stride[VPX_PLANE_V], 384 raw[i].d_w, raw[i].d_h, 1); 385 } 386 } 387 388 /* Encode each frame at multi-levels */ 389 if(vpx_codec_encode(&codec[0], frame_avail? &raw[0] : NULL, 390 frame_cnt, 1, flags, arg_deadline)) 391 die_codec(&codec[0], "Failed to encode frame"); 392 393 for (i=NUM_ENCODERS-1; i>=0 ; i--) 394 { 395 got_data = 0; 396 397 while( (pkt[i] = vpx_codec_get_cx_data(&codec[i], &iter[i])) ) 398 { 399 got_data = 1; 400 switch(pkt[i]->kind) { 401 case VPX_CODEC_CX_FRAME_PKT: 402 write_ivf_frame_header(outfile[i], pkt[i]); 403 (void) fwrite(pkt[i]->data.frame.buf, 1, 404 pkt[i]->data.frame.sz, outfile[i]); 405 break; 406 case VPX_CODEC_PSNR_PKT: 407 if (show_psnr) 408 { 409 int j; 410 411 psnr_sse_total[i] += pkt[i]->data.psnr.sse[0]; 412 psnr_samples_total[i] += pkt[i]->data.psnr.samples[0]; 413 for (j = 0; j < 4; j++) 414 { 415 //fprintf(stderr, "%.3lf ", pkt[i]->data.psnr.psnr[j]); 416 psnr_totals[i][j] += pkt[i]->data.psnr.psnr[j]; 417 } 418 psnr_count[i]++; 419 } 420 421 break; 422 default: 423 break; 424 } 425 printf(pkt[i]->kind == VPX_CODEC_CX_FRAME_PKT 426 && (pkt[i]->data.frame.flags & VPX_FRAME_IS_KEY)? "K":"."); 427 fflush(stdout); 428 } 429 } 430 frame_cnt++; 431 } 432 printf("\n"); 433 434 fclose(infile); 435 436 printf("Processed %ld frames.\n",(long int)frame_cnt-1); 437 for (i=0; i< NUM_ENCODERS; i++) 438 { 439 /* Calculate PSNR and print it out */ 440 if ( (show_psnr) && (psnr_count[i]>0) ) 441 { 442 int j; 443 double ovpsnr = sse_to_psnr(psnr_samples_total[i], 255.0, 444 psnr_sse_total[i]); 445 446 fprintf(stderr, "\n ENC%d PSNR (Overall/Avg/Y/U/V)", i); 447 448 fprintf(stderr, " %.3lf", ovpsnr); 449 for (j = 0; j < 4; j++) 450 { 451 fprintf(stderr, " %.3lf", psnr_totals[i][j]/psnr_count[i]); 452 } 453 } 454 455 if(vpx_codec_destroy(&codec[i])) 456 die_codec(&codec[i], "Failed to destroy codec"); 457 458 vpx_img_free(&raw[i]); 459 460 if(!outfile[i]) 461 continue; 462 463 /* Try to rewrite the file header with the actual frame count */ 464 if(!fseek(outfile[i], 0, SEEK_SET)) 465 write_ivf_file_header(outfile[i], &cfg[i], frame_cnt-1); 466 fclose(outfile[i]); 467 } 468 printf("\n"); 469 470 return EXIT_SUCCESS; 471 } 472
