2 * Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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.
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.
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 #define interface (vpx_codec_vp8_cx())
27 #define fourcc 0x30385056
29 #define IVF_FILE_HDR_SZ (32)
30 #define IVF_FRAME_HDR_SZ (12)
33 * The input video frame is downsampled several times to generate a multi-level
34 * hierarchical structure. NUM_ENCODERS is defined as the number of encoding
35 * levels required. For example, if the size of input video is 1280x720,
36 * NUM_ENCODERS is 3, and down-sampling factor is 2, the encoder outputs 3
37 * bitstreams with resolution of 1280x720(level 0), 640x360(level 1), and
38 * 320x180(level 2) respectively.
40 #define NUM_ENCODERS 3
42 /* This example uses the scaler function in libyuv. */
43 #include "third_party/libyuv/include/libyuv/basic_types.h"
44 #include "third_party/libyuv/include/libyuv/scale.h"
45 #include "third_party/libyuv/include/libyuv/cpu_id.h"
47 static double vp8_mse2psnr(double Samples, double Peak, double Mse)
51 if ((double)Mse > 0.0)
52 psnr = 10.0 * log10(Peak * Peak * Samples / Mse);
54 psnr = 60; // Limit to prevent / 0
62 static void die(const char *fmt, ...) {
67 if(fmt[strlen(fmt)-1] != '\n')
72 static void die_codec(vpx_codec_ctx_t *ctx, const char *s) {
73 const char *detail = vpx_codec_error_detail(ctx);
75 printf("%s: %s\n", s, vpx_codec_error(ctx));
77 printf(" %s\n",detail);
81 int (*read_frame_p)(FILE *f, vpx_image_t *img);
83 static int read_frame(FILE *f, vpx_image_t *img) {
84 size_t nbytes, to_read;
87 to_read = img->w*img->h*3/2;
88 nbytes = fread(img->planes[0], 1, to_read, f);
89 if(nbytes != to_read) {
92 printf("Warning: Read partial frame. Check your width & height!\n");
97 static int read_frame_by_row(FILE *f, vpx_image_t *img) {
98 size_t nbytes, to_read;
102 for (plane = 0; plane < 3; plane++)
105 int w = (plane ? (1 + img->d_w) / 2 : img->d_w);
106 int h = (plane ? (1 + img->d_h) / 2 : img->d_h);
109 /* Determine the correct plane based on the image format. The for-loop
110 * always counts in Y,U,V order, but this may not match the order of
116 ptr = img->planes[img->fmt==VPX_IMG_FMT_YV12? VPX_PLANE_V : VPX_PLANE_U];
119 ptr = img->planes[img->fmt==VPX_IMG_FMT_YV12?VPX_PLANE_U : VPX_PLANE_V];
122 ptr = img->planes[plane];
125 for (r = 0; r < h; r++)
129 nbytes = fread(ptr, 1, to_read, f);
130 if(nbytes != to_read) {
133 printf("Warning: Read partial frame. Check your width & height!\n");
137 ptr += img->stride[plane];
146 static void write_ivf_file_header(FILE *outfile,
147 const vpx_codec_enc_cfg_t *cfg,
151 if(cfg->g_pass != VPX_RC_ONE_PASS && cfg->g_pass != VPX_RC_LAST_PASS)
157 mem_put_le16(header+4, 0); /* version */
158 mem_put_le16(header+6, 32); /* headersize */
159 mem_put_le32(header+8, fourcc); /* headersize */
160 mem_put_le16(header+12, cfg->g_w); /* width */
161 mem_put_le16(header+14, cfg->g_h); /* height */
162 mem_put_le32(header+16, cfg->g_timebase.den); /* rate */
163 mem_put_le32(header+20, cfg->g_timebase.num); /* scale */
164 mem_put_le32(header+24, frame_cnt); /* length */
165 mem_put_le32(header+28, 0); /* unused */
167 if(fwrite(header, 1, 32, outfile));
170 static void write_ivf_frame_header(FILE *outfile,
171 const vpx_codec_cx_pkt_t *pkt)
176 if(pkt->kind != VPX_CODEC_CX_FRAME_PKT)
179 pts = pkt->data.frame.pts;
180 mem_put_le32(header, pkt->data.frame.sz);
181 mem_put_le32(header+4, pts&0xFFFFFFFF);
182 mem_put_le32(header+8, pts >> 32);
184 if(fwrite(header, 1, 12, outfile));
187 int main(int argc, char **argv)
189 FILE *infile, *outfile[NUM_ENCODERS];
190 vpx_codec_ctx_t codec[NUM_ENCODERS];
191 vpx_codec_enc_cfg_t cfg[NUM_ENCODERS];
192 vpx_codec_pts_t frame_cnt = 0;
193 vpx_image_t raw[NUM_ENCODERS];
194 vpx_codec_err_t res[NUM_ENCODERS];
203 /*Currently, only realtime mode is supported in multi-resolution encoding.*/
204 int arg_deadline = VPX_DL_REALTIME;
206 /* Set show_psnr to 1/0 to show/not show PSNR. Choose show_psnr=0 if you
207 don't need to know PSNR, which will skip PSNR calculation and save
210 uint64_t psnr_sse_total[NUM_ENCODERS] = {0};
211 uint64_t psnr_samples_total[NUM_ENCODERS] = {0};
212 double psnr_totals[NUM_ENCODERS][4] = {{0,0}};
213 int psnr_count[NUM_ENCODERS] = {0};
215 /* Set the required target bitrates for each resolution level. */
216 unsigned int target_bitrate[NUM_ENCODERS]={1400, 500, 100};
217 /* Enter the frame rate of the input video */
219 /* Set down-sampling factor for each resolution level.
220 dsf[0] controls down sampling from level 0 to level 1;
221 dsf[1] controls down sampling from level 1 to level 2;
222 dsf[2] is not used. */
223 vpx_rational_t dsf[NUM_ENCODERS] = {{2, 1}, {2, 1}, {1, 1}};
225 if(argc!= (5+NUM_ENCODERS))
226 die("Usage: %s <width> <height> <infile> <outfile(s)> <output psnr?>\n",
229 printf("Using %s\n",vpx_codec_iface_name(interface));
231 width = strtol(argv[1], NULL, 0);
232 height = strtol(argv[2], NULL, 0);
234 if(width < 16 || width%2 || height <16 || height%2)
235 die("Invalid resolution: %ldx%ld", width, height);
237 /* Open input video file for encoding */
238 if(!(infile = fopen(argv[3], "rb")))
239 die("Failed to open %s for reading", argv[3]);
241 /* Open output file for each encoder to output bitstreams */
242 for (i=0; i< NUM_ENCODERS; i++)
244 if(!(outfile[i] = fopen(argv[i+4], "wb")))
245 die("Failed to open %s for writing", argv[i+4]);
248 show_psnr = strtol(argv[NUM_ENCODERS + 4], NULL, 0);
250 /* Populate default encoder configuration */
251 for (i=0; i< NUM_ENCODERS; i++)
253 res[i] = vpx_codec_enc_config_default(interface, &cfg[i], 0);
255 printf("Failed to get config: %s\n", vpx_codec_err_to_string(res[i]));
261 * Update the default configuration according to needs of the application.
263 /* Highest-resolution encoder settings */
266 cfg[0].g_threads = 1; /* number of threads used */
267 cfg[0].rc_dropframe_thresh = 0;
268 cfg[0].rc_end_usage = VPX_CBR;
269 cfg[0].rc_resize_allowed = 0;
270 cfg[0].rc_min_quantizer = 4;
271 cfg[0].rc_max_quantizer = 56;
272 cfg[0].rc_undershoot_pct = 98;
273 cfg[0].rc_overshoot_pct = 100;
274 cfg[0].rc_buf_initial_sz = 500;
275 cfg[0].rc_buf_optimal_sz = 600;
276 cfg[0].rc_buf_sz = 1000;
277 //cfg[0].rc_dropframe_thresh = 10;
278 cfg[0].g_error_resilient = 1; /* Enable error resilient mode */
279 cfg[0].g_lag_in_frames = 0;
281 /* Disable automatic keyframe placement */
282 //cfg[0].kf_mode = VPX_KF_DISABLED;
283 cfg[0].kf_min_dist = cfg[0].kf_max_dist = 1000;
285 cfg[0].rc_target_bitrate = target_bitrate[0]; /* Set target bitrate */
286 cfg[0].g_timebase.num = 1; /* Set fps */
287 cfg[0].g_timebase.den = framerate;
289 /* Other-resolution encoder settings */
290 for (i=1; i< NUM_ENCODERS; i++)
292 memcpy(&cfg[i], &cfg[0], sizeof(vpx_codec_enc_cfg_t));
294 cfg[i].g_threads = 1; /* number of threads used */
295 cfg[i].rc_target_bitrate = target_bitrate[i];
297 /* Note: Width & height of other-resolution encoders are calculated
298 * from the highest-resolution encoder's size and the corresponding
299 * down_sampling_factor.
302 unsigned int iw = cfg[i-1].g_w*dsf[i-1].den + dsf[i-1].num - 1;
303 unsigned int ih = cfg[i-1].g_h*dsf[i-1].den + dsf[i-1].num - 1;
304 cfg[i].g_w = iw/dsf[i-1].num;
305 cfg[i].g_h = ih/dsf[i-1].num;
308 /* Make width & height to be multiplier of 2. */
309 // Should support odd size ???
310 if((cfg[i].g_w)%2)cfg[i].g_w++;
311 if((cfg[i].g_h)%2)cfg[i].g_h++;
314 /* Allocate image for each encoder */
315 for (i=0; i< NUM_ENCODERS; i++)
316 if(!vpx_img_alloc(&raw[i], VPX_IMG_FMT_I420, cfg[i].g_w, cfg[i].g_h, 32))
317 die("Failed to allocate image", cfg[i].g_w, cfg[i].g_h);
319 if (raw[0].stride[VPX_PLANE_Y] == raw[0].d_w)
320 read_frame_p = read_frame;
322 read_frame_p = read_frame_by_row;
324 for (i=0; i< NUM_ENCODERS; i++)
325 write_ivf_file_header(outfile[i], &cfg[i], 0);
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");
332 /* The extra encoding configuration parameters can be set as follows. */
333 /* Set encoding speed */
334 for ( i=0; i<NUM_ENCODERS; i++)
337 if(vpx_codec_control(&codec[i], VP8E_SET_CPUUSED, speed))
338 die_codec(&codec[i], "Failed to set cpu_used");
340 /* Set static thresh for highest-resolution encoder. Set it to 1000 for
341 * better performance. */
343 unsigned int static_thresh = 1000;
344 if(vpx_codec_control(&codec[0], VP8E_SET_STATIC_THRESHOLD, static_thresh))
345 die_codec(&codec[0], "Failed to set static threshold");
347 /* Set static thresh = 0 for other encoders for better quality */
348 for ( i=1; i<NUM_ENCODERS; i++)
350 unsigned int static_thresh = 0;
351 if(vpx_codec_control(&codec[i], VP8E_SET_STATIC_THRESHOLD, static_thresh))
352 die_codec(&codec[i], "Failed to set static threshold");
358 while(frame_avail || got_data)
360 vpx_codec_iter_t iter[NUM_ENCODERS]={NULL};
361 const vpx_codec_cx_pkt_t *pkt[NUM_ENCODERS];
364 frame_avail = read_frame_p(infile, &raw[0]);
368 for ( i=1; i<NUM_ENCODERS; i++)
370 /*Scale the image down a number of times by downsampling factor*/
371 /* FilterMode 1 or 2 give better psnr than FilterMode 0. */
372 I420Scale(raw[i-1].planes[VPX_PLANE_Y], raw[i-1].stride[VPX_PLANE_Y],
373 raw[i-1].planes[VPX_PLANE_U], raw[i-1].stride[VPX_PLANE_U],
374 raw[i-1].planes[VPX_PLANE_V], raw[i-1].stride[VPX_PLANE_V],
375 raw[i-1].d_w, raw[i-1].d_h,
376 raw[i].planes[VPX_PLANE_Y], raw[i].stride[VPX_PLANE_Y],
377 raw[i].planes[VPX_PLANE_U], raw[i].stride[VPX_PLANE_U],
378 raw[i].planes[VPX_PLANE_V], raw[i].stride[VPX_PLANE_V],
379 raw[i].d_w, raw[i].d_h, 1);
383 /* Encode each frame at multi-levels */
384 if(vpx_codec_encode(&codec[0], frame_avail? &raw[0] : NULL,
385 frame_cnt, 1, flags, arg_deadline))
386 die_codec(&codec[0], "Failed to encode frame");
388 for (i=NUM_ENCODERS-1; i>=0 ; i--)
392 while( (pkt[i] = vpx_codec_get_cx_data(&codec[i], &iter[i])) )
395 switch(pkt[i]->kind) {
396 case VPX_CODEC_CX_FRAME_PKT:
397 write_ivf_frame_header(outfile[i], pkt[i]);
398 if(fwrite(pkt[i]->data.frame.buf, 1, pkt[i]->data.frame.sz,
401 case VPX_CODEC_PSNR_PKT:
406 psnr_sse_total[i] += pkt[i]->data.psnr.sse[0];
407 psnr_samples_total[i] += pkt[i]->data.psnr.samples[0];
408 for (j = 0; j < 4; j++)
410 //fprintf(stderr, "%.3lf ", pkt[i]->data.psnr.psnr[j]);
411 psnr_totals[i][j] += pkt[i]->data.psnr.psnr[j];
420 printf(pkt[i]->kind == VPX_CODEC_CX_FRAME_PKT
421 && (pkt[i]->data.frame.flags & VPX_FRAME_IS_KEY)? "K":".");
431 for (i=0; i< NUM_ENCODERS; i++)
433 printf("Processed %ld frames.\n",(long int)frame_cnt-1);
435 /* Calculate PSNR and print it out */
436 if ( (show_psnr) && (psnr_count[i]>0) )
439 double ovpsnr = vp8_mse2psnr(psnr_samples_total[i], 255.0,
442 fprintf(stderr, "\n ENC%d PSNR (Overall/Avg/Y/U/V)", i);
444 fprintf(stderr, " %.3lf", ovpsnr);
445 for (j = 0; j < 4; j++)
447 fprintf(stderr, " %.3lf", psnr_totals[i][j]/psnr_count[i]);
451 if(vpx_codec_destroy(&codec[i]))
452 die_codec(&codec[i], "Failed to destroy codec");
454 /* Try to rewrite the file header with the actual frame count */
455 if(!fseek(outfile[i], 0, SEEK_SET))
456 write_ivf_file_header(outfile[i], &cfg[i], frame_cnt-1);
459 vpx_img_free(&raw[i]);