| /* |
| * Copyright (c) 2010 The WebM project authors. All Rights Reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| /* |
| * This is an example demonstrating multi-resolution encoding in VP8. |
| * High-resolution input video is down-sampled to lower-resolutions. The |
| * encoder then encodes the video and outputs multiple bitstreams with |
| * different resolutions. |
| */ |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <stdarg.h> |
| #include <string.h> |
| #include "math.h" |
| #define VPX_CODEC_DISABLE_COMPAT 1 |
| #include "vpx/vpx_encoder.h" |
| #include "vpx/vp8cx.h" |
| #include "vpx_ports/mem_ops.h" |
| #define interface (vpx_codec_vp8_cx()) |
| #define fourcc 0x30385056 |
| |
| #define IVF_FILE_HDR_SZ (32) |
| #define IVF_FRAME_HDR_SZ (12) |
| |
| /* |
| * The input video frame is downsampled several times to generate a multi-level |
| * hierarchical structure. NUM_ENCODERS is defined as the number of encoding |
| * levels required. For example, if the size of input video is 1280x720, |
| * NUM_ENCODERS is 3, and down-sampling factor is 2, the encoder outputs 3 |
| * bitstreams with resolution of 1280x720(level 0), 640x360(level 1), and |
| * 320x180(level 2) respectively. |
| */ |
| #define NUM_ENCODERS 3 |
| |
| /* This example uses the scaler function in libyuv. */ |
| #include "third_party/libyuv/include/libyuv/basic_types.h" |
| #include "third_party/libyuv/include/libyuv/scale.h" |
| #include "third_party/libyuv/include/libyuv/cpu_id.h" |
| |
| static double vp8_mse2psnr(double Samples, double Peak, double Mse) |
| { |
| double psnr; |
| |
| if ((double)Mse > 0.0) |
| psnr = 10.0 * log10(Peak * Peak * Samples / Mse); |
| else |
| psnr = 60; // Limit to prevent / 0 |
| |
| if (psnr > 60) |
| psnr = 60; |
| |
| return psnr; |
| } |
| |
| static void die(const char *fmt, ...) { |
| va_list ap; |
| |
| va_start(ap, fmt); |
| vprintf(fmt, ap); |
| if(fmt[strlen(fmt)-1] != '\n') |
| printf("\n"); |
| exit(EXIT_FAILURE); |
| } |
| |
| static void die_codec(vpx_codec_ctx_t *ctx, const char *s) { |
| const char *detail = vpx_codec_error_detail(ctx); |
| |
| printf("%s: %s\n", s, vpx_codec_error(ctx)); |
| if(detail) |
| printf(" %s\n",detail); |
| exit(EXIT_FAILURE); |
| } |
| |
| int (*read_frame_p)(FILE *f, vpx_image_t *img); |
| |
| static int read_frame(FILE *f, vpx_image_t *img) { |
| size_t nbytes, to_read; |
| int res = 1; |
| |
| to_read = img->w*img->h*3/2; |
| nbytes = fread(img->planes[0], 1, to_read, f); |
| if(nbytes != to_read) { |
| res = 0; |
| if(nbytes > 0) |
| printf("Warning: Read partial frame. Check your width & height!\n"); |
| } |
| return res; |
| } |
| |
| static int read_frame_by_row(FILE *f, vpx_image_t *img) { |
| size_t nbytes, to_read; |
| int res = 1; |
| int plane; |
| |
| for (plane = 0; plane < 3; plane++) |
| { |
| unsigned char *ptr; |
| int w = (plane ? (1 + img->d_w) / 2 : img->d_w); |
| int h = (plane ? (1 + img->d_h) / 2 : img->d_h); |
| int r; |
| |
| /* Determine the correct plane based on the image format. The for-loop |
| * always counts in Y,U,V order, but this may not match the order of |
| * the data on disk. |
| */ |
| switch (plane) |
| { |
| case 1: |
| ptr = img->planes[img->fmt==VPX_IMG_FMT_YV12? VPX_PLANE_V : VPX_PLANE_U]; |
| break; |
| case 2: |
| ptr = img->planes[img->fmt==VPX_IMG_FMT_YV12?VPX_PLANE_U : VPX_PLANE_V]; |
| break; |
| default: |
| ptr = img->planes[plane]; |
| } |
| |
| for (r = 0; r < h; r++) |
| { |
| to_read = w; |
| |
| nbytes = fread(ptr, 1, to_read, f); |
| if(nbytes != to_read) { |
| res = 0; |
| if(nbytes > 0) |
| printf("Warning: Read partial frame. Check your width & height!\n"); |
| break; |
| } |
| |
| ptr += img->stride[plane]; |
| } |
| if (!res) |
| break; |
| } |
| |
| return res; |
| } |
| |
| static void write_ivf_file_header(FILE *outfile, |
| const vpx_codec_enc_cfg_t *cfg, |
| int frame_cnt) { |
| char header[32]; |
| |
| if(cfg->g_pass != VPX_RC_ONE_PASS && cfg->g_pass != VPX_RC_LAST_PASS) |
| return; |
| header[0] = 'D'; |
| header[1] = 'K'; |
| header[2] = 'I'; |
| header[3] = 'F'; |
| mem_put_le16(header+4, 0); /* version */ |
| mem_put_le16(header+6, 32); /* headersize */ |
| mem_put_le32(header+8, fourcc); /* headersize */ |
| mem_put_le16(header+12, cfg->g_w); /* width */ |
| mem_put_le16(header+14, cfg->g_h); /* height */ |
| mem_put_le32(header+16, cfg->g_timebase.den); /* rate */ |
| mem_put_le32(header+20, cfg->g_timebase.num); /* scale */ |
| mem_put_le32(header+24, frame_cnt); /* length */ |
| mem_put_le32(header+28, 0); /* unused */ |
| |
| if(fwrite(header, 1, 32, outfile)); |
| } |
| |
| static void write_ivf_frame_header(FILE *outfile, |
| const vpx_codec_cx_pkt_t *pkt) |
| { |
| char header[12]; |
| vpx_codec_pts_t pts; |
| |
| if(pkt->kind != VPX_CODEC_CX_FRAME_PKT) |
| return; |
| |
| pts = pkt->data.frame.pts; |
| mem_put_le32(header, pkt->data.frame.sz); |
| mem_put_le32(header+4, pts&0xFFFFFFFF); |
| mem_put_le32(header+8, pts >> 32); |
| |
| if(fwrite(header, 1, 12, outfile)); |
| } |
| |
| int main(int argc, char **argv) |
| { |
| FILE *infile, *outfile[NUM_ENCODERS]; |
| vpx_codec_ctx_t codec[NUM_ENCODERS]; |
| vpx_codec_enc_cfg_t cfg[NUM_ENCODERS]; |
| vpx_codec_pts_t frame_cnt = 0; |
| vpx_image_t raw[NUM_ENCODERS]; |
| vpx_codec_err_t res[NUM_ENCODERS]; |
| |
| int i; |
| long width; |
| long height; |
| int frame_avail; |
| int got_data; |
| int flags = 0; |
| |
| /*Currently, only realtime mode is supported in multi-resolution encoding.*/ |
| int arg_deadline = VPX_DL_REALTIME; |
| |
| /* Set show_psnr to 1/0 to show/not show PSNR. Choose show_psnr=0 if you |
| don't need to know PSNR, which will skip PSNR calculation and save |
| encoding time. */ |
| int show_psnr = 0; |
| uint64_t psnr_sse_total[NUM_ENCODERS] = {0}; |
| uint64_t psnr_samples_total[NUM_ENCODERS] = {0}; |
| double psnr_totals[NUM_ENCODERS][4] = {{0,0}}; |
| int psnr_count[NUM_ENCODERS] = {0}; |
| |
| /* Set the required target bitrates for each resolution level. |
| * If target bitrate for highest-resolution level is set to 0, |
| * (i.e. target_bitrate[0]=0), we skip encoding at that level. |
| */ |
| unsigned int target_bitrate[NUM_ENCODERS]={1400, 500, 100}; |
| /* Enter the frame rate of the input video */ |
| int framerate = 30; |
| /* Set down-sampling factor for each resolution level. |
| dsf[0] controls down sampling from level 0 to level 1; |
| dsf[1] controls down sampling from level 1 to level 2; |
| dsf[2] is not used. */ |
| vpx_rational_t dsf[NUM_ENCODERS] = {{2, 1}, {2, 1}, {1, 1}}; |
| |
| if(argc!= (5+NUM_ENCODERS)) |
| die("Usage: %s <width> <height> <infile> <outfile(s)> <output psnr?>\n", |
| argv[0]); |
| |
| printf("Using %s\n",vpx_codec_iface_name(interface)); |
| |
| width = strtol(argv[1], NULL, 0); |
| height = strtol(argv[2], NULL, 0); |
| |
| if(width < 16 || width%2 || height <16 || height%2) |
| die("Invalid resolution: %ldx%ld", width, height); |
| |
| /* Open input video file for encoding */ |
| if(!(infile = fopen(argv[3], "rb"))) |
| die("Failed to open %s for reading", argv[3]); |
| |
| /* Open output file for each encoder to output bitstreams */ |
| for (i=0; i< NUM_ENCODERS; i++) |
| { |
| if(!target_bitrate[i]) |
| { |
| outfile[i] = NULL; |
| continue; |
| } |
| |
| if(!(outfile[i] = fopen(argv[i+4], "wb"))) |
| die("Failed to open %s for writing", argv[i+4]); |
| } |
| |
| show_psnr = strtol(argv[NUM_ENCODERS + 4], NULL, 0); |
| |
| /* Populate default encoder configuration */ |
| for (i=0; i< NUM_ENCODERS; i++) |
| { |
| res[i] = vpx_codec_enc_config_default(interface, &cfg[i], 0); |
| if(res[i]) { |
| printf("Failed to get config: %s\n", vpx_codec_err_to_string(res[i])); |
| return EXIT_FAILURE; |
| } |
| } |
| |
| /* |
| * Update the default configuration according to needs of the application. |
| */ |
| /* Highest-resolution encoder settings */ |
| cfg[0].g_w = width; |
| cfg[0].g_h = height; |
| cfg[0].g_threads = 1; /* number of threads used */ |
| cfg[0].rc_dropframe_thresh = 0; |
| cfg[0].rc_end_usage = VPX_CBR; |
| cfg[0].rc_resize_allowed = 0; |
| cfg[0].rc_min_quantizer = 4; |
| cfg[0].rc_max_quantizer = 56; |
| cfg[0].rc_undershoot_pct = 98; |
| cfg[0].rc_overshoot_pct = 100; |
| cfg[0].rc_buf_initial_sz = 500; |
| cfg[0].rc_buf_optimal_sz = 600; |
| cfg[0].rc_buf_sz = 1000; |
| //cfg[0].rc_dropframe_thresh = 10; |
| cfg[0].g_error_resilient = 1; /* Enable error resilient mode */ |
| cfg[0].g_lag_in_frames = 0; |
| |
| /* Disable automatic keyframe placement */ |
| //cfg[0].kf_mode = VPX_KF_DISABLED; |
| cfg[0].kf_min_dist = cfg[0].kf_max_dist = 1000; |
| |
| cfg[0].rc_target_bitrate = target_bitrate[0]; /* Set target bitrate */ |
| cfg[0].g_timebase.num = 1; /* Set fps */ |
| cfg[0].g_timebase.den = framerate; |
| |
| /* Other-resolution encoder settings */ |
| for (i=1; i< NUM_ENCODERS; i++) |
| { |
| memcpy(&cfg[i], &cfg[0], sizeof(vpx_codec_enc_cfg_t)); |
| |
| cfg[i].g_threads = 1; /* number of threads used */ |
| cfg[i].rc_target_bitrate = target_bitrate[i]; |
| |
| /* Note: Width & height of other-resolution encoders are calculated |
| * from the highest-resolution encoder's size and the corresponding |
| * down_sampling_factor. |
| */ |
| { |
| unsigned int iw = cfg[i-1].g_w*dsf[i-1].den + dsf[i-1].num - 1; |
| unsigned int ih = cfg[i-1].g_h*dsf[i-1].den + dsf[i-1].num - 1; |
| cfg[i].g_w = iw/dsf[i-1].num; |
| cfg[i].g_h = ih/dsf[i-1].num; |
| } |
| |
| /* Make width & height to be multiplier of 2. */ |
| // Should support odd size ??? |
| if((cfg[i].g_w)%2)cfg[i].g_w++; |
| if((cfg[i].g_h)%2)cfg[i].g_h++; |
| } |
| |
| /* Allocate image for each encoder */ |
| for (i=0; i< NUM_ENCODERS; i++) |
| if(!vpx_img_alloc(&raw[i], VPX_IMG_FMT_I420, cfg[i].g_w, cfg[i].g_h, 32)) |
| die("Failed to allocate image", cfg[i].g_w, cfg[i].g_h); |
| |
| if (raw[0].stride[VPX_PLANE_Y] == raw[0].d_w) |
| read_frame_p = read_frame; |
| else |
| read_frame_p = read_frame_by_row; |
| |
| for (i=0; i< NUM_ENCODERS; i++) |
| if(outfile[i]) |
| write_ivf_file_header(outfile[i], &cfg[i], 0); |
| |
| /* Initialize multi-encoder */ |
| if(vpx_codec_enc_init_multi(&codec[0], interface, &cfg[0], NUM_ENCODERS, |
| (show_psnr ? VPX_CODEC_USE_PSNR : 0), &dsf[0])) |
| die_codec(&codec[0], "Failed to initialize encoder"); |
| |
| /* The extra encoding configuration parameters can be set as follows. */ |
| /* Set encoding speed */ |
| for ( i=0; i<NUM_ENCODERS; i++) |
| { |
| int speed = -6; |
| if(vpx_codec_control(&codec[i], VP8E_SET_CPUUSED, speed)) |
| die_codec(&codec[i], "Failed to set cpu_used"); |
| } |
| /* Set static thresh for highest-resolution encoder. Set it to 1000 for |
| * better performance. */ |
| { |
| unsigned int static_thresh = 1000; |
| if(vpx_codec_control(&codec[0], VP8E_SET_STATIC_THRESHOLD, static_thresh)) |
| die_codec(&codec[0], "Failed to set static threshold"); |
| } |
| /* Set static thresh = 0 for other encoders for better quality */ |
| for ( i=1; i<NUM_ENCODERS; i++) |
| { |
| unsigned int static_thresh = 0; |
| if(vpx_codec_control(&codec[i], VP8E_SET_STATIC_THRESHOLD, static_thresh)) |
| die_codec(&codec[i], "Failed to set static threshold"); |
| } |
| |
| frame_avail = 1; |
| got_data = 0; |
| |
| while(frame_avail || got_data) |
| { |
| vpx_codec_iter_t iter[NUM_ENCODERS]={NULL}; |
| const vpx_codec_cx_pkt_t *pkt[NUM_ENCODERS]; |
| |
| flags = 0; |
| frame_avail = read_frame_p(infile, &raw[0]); |
| |
| if(frame_avail) |
| { |
| for ( i=1; i<NUM_ENCODERS; i++) |
| { |
| /*Scale the image down a number of times by downsampling factor*/ |
| /* FilterMode 1 or 2 give better psnr than FilterMode 0. */ |
| I420Scale(raw[i-1].planes[VPX_PLANE_Y], raw[i-1].stride[VPX_PLANE_Y], |
| raw[i-1].planes[VPX_PLANE_U], raw[i-1].stride[VPX_PLANE_U], |
| raw[i-1].planes[VPX_PLANE_V], raw[i-1].stride[VPX_PLANE_V], |
| raw[i-1].d_w, raw[i-1].d_h, |
| raw[i].planes[VPX_PLANE_Y], raw[i].stride[VPX_PLANE_Y], |
| raw[i].planes[VPX_PLANE_U], raw[i].stride[VPX_PLANE_U], |
| raw[i].planes[VPX_PLANE_V], raw[i].stride[VPX_PLANE_V], |
| raw[i].d_w, raw[i].d_h, 1); |
| } |
| } |
| |
| /* Encode each frame at multi-levels */ |
| if(vpx_codec_encode(&codec[0], frame_avail? &raw[0] : NULL, |
| frame_cnt, 1, flags, arg_deadline)) |
| die_codec(&codec[0], "Failed to encode frame"); |
| |
| for (i=NUM_ENCODERS-1; i>=0 ; i--) |
| { |
| got_data = 0; |
| |
| while( (pkt[i] = vpx_codec_get_cx_data(&codec[i], &iter[i])) ) |
| { |
| got_data = 1; |
| switch(pkt[i]->kind) { |
| case VPX_CODEC_CX_FRAME_PKT: |
| write_ivf_frame_header(outfile[i], pkt[i]); |
| if(fwrite(pkt[i]->data.frame.buf, 1, pkt[i]->data.frame.sz, |
| outfile[i])); |
| break; |
| case VPX_CODEC_PSNR_PKT: |
| if (show_psnr) |
| { |
| int j; |
| |
| psnr_sse_total[i] += pkt[i]->data.psnr.sse[0]; |
| psnr_samples_total[i] += pkt[i]->data.psnr.samples[0]; |
| for (j = 0; j < 4; j++) |
| { |
| //fprintf(stderr, "%.3lf ", pkt[i]->data.psnr.psnr[j]); |
| psnr_totals[i][j] += pkt[i]->data.psnr.psnr[j]; |
| } |
| psnr_count[i]++; |
| } |
| |
| break; |
| default: |
| break; |
| } |
| printf(pkt[i]->kind == VPX_CODEC_CX_FRAME_PKT |
| && (pkt[i]->data.frame.flags & VPX_FRAME_IS_KEY)? "K":"."); |
| fflush(stdout); |
| } |
| } |
| frame_cnt++; |
| } |
| printf("\n"); |
| |
| fclose(infile); |
| |
| printf("Processed %ld frames.\n",(long int)frame_cnt-1); |
| for (i=0; i< NUM_ENCODERS; i++) |
| { |
| /* Calculate PSNR and print it out */ |
| if ( (show_psnr) && (psnr_count[i]>0) ) |
| { |
| int j; |
| double ovpsnr = vp8_mse2psnr(psnr_samples_total[i], 255.0, |
| psnr_sse_total[i]); |
| |
| fprintf(stderr, "\n ENC%d PSNR (Overall/Avg/Y/U/V)", i); |
| |
| fprintf(stderr, " %.3lf", ovpsnr); |
| for (j = 0; j < 4; j++) |
| { |
| fprintf(stderr, " %.3lf", psnr_totals[i][j]/psnr_count[i]); |
| } |
| } |
| |
| if(vpx_codec_destroy(&codec[i])) |
| die_codec(&codec[i], "Failed to destroy codec"); |
| |
| vpx_img_free(&raw[i]); |
| |
| if(!outfile[i]) |
| continue; |
| |
| /* Try to rewrite the file header with the actual frame count */ |
| if(!fseek(outfile[i], 0, SEEK_SET)) |
| write_ivf_file_header(outfile[i], &cfg[i], frame_cnt-1); |
| fclose(outfile[i]); |
| } |
| printf("\n"); |
| |
| return EXIT_SUCCESS; |
| } |
