/* * Copyright (c) 2012 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 how to implement a multi-layer * VP9 encoding scheme based on spatial scalability for video applications * that benefit from a scalable bitstream. */ #include #include #include #include #include #include #include #define VPX_CODEC_DISABLE_COMPAT 1 #include "vpx/vpx_encoder.h" #include "vpx/vp8cx.h" #define interface (vpx_codec_vp9_cx()) #define fourcc 0x30395056 #define IVF_FILE_HDR_SZ (32) #define IVF_FRAME_HDR_SZ (12) #define NUM_BUFFERS 8 char *input_filename; char *output_filename; unsigned int number_frames_to_code = 60 * 60; unsigned int number_frames_to_skip = 0; unsigned int number_spatial_layers = 5; unsigned int key_period = 100; typedef enum ENCODING_MODE { INTER_LAYER_PREDICTION_I, INTER_LAYER_PREDICTION_IP, USE_GOLDEN_FRAME } ENCODING_MODE; static void mem_put_le16(char *mem, unsigned int val) { mem[0] = val; mem[1] = val >> 8; } static void mem_put_le32(char *mem, unsigned int val) { mem[0] = val; mem[1] = val >> 8; mem[2] = val >> 16; mem[3] = val >> 24; } static void usage(char *program_name) { printf( "Usage: %s [-f frames] [-s skip_frames] [-w width] [-h height] \n\t" "[-n rate_num] [-d rate_den] [-b bitrate] [-l layers] " " \n", basename(program_name)); exit(EXIT_FAILURE); } 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); } 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_dummy_frame(vpx_image_t *img) { size_t to_read; to_read = img->w * img->h * 3 / 2; memset(img->planes[0], 129, to_read); return 1; } 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 */ (void)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); (void)fwrite(header, 1, 12, outfile); } static void check_parameters() { if (number_spatial_layers > 5) die("Cannot support more than 5 layers"); } static void parse_command_line(int argc, char **argv, vpx_codec_enc_cfg_t *cfg) { unsigned int width = 1920; unsigned int height = 1080; unsigned int timebase_num = 1; unsigned int timebase_den = 60; unsigned int bitrate = 1000; int c; vpx_codec_err_t res; opterr = 0; while ((c = getopt(argc, argv, "f:w:h:n:d:b:s:l:p:")) != -1) switch (c) { case 'f': number_frames_to_code = atoi(optarg); break; case 'w': width = atoi(optarg); break; case 'h': height = atoi(optarg); break; case 'n': timebase_num = atoi(optarg); break; case 'd': timebase_den = atoi(optarg); break; case 'b': bitrate = atoi(optarg); break; case 's': number_frames_to_skip = atoi(optarg); break; case 'l': number_spatial_layers = atoi(optarg); break; case 'p': key_period = atoi(optarg); break; case '?': usage(argv[0]); } // Parse required parameters if (argc - optind != 2) { usage(argv[0]); } input_filename = argv[optind]; output_filename = argv[optind + 1]; if (width < 16 || width % 2 || height < 16 || height % 2) die("Invalid resolution: %d x %d", width, height); /* Populate encoder configuration */ res = vpx_codec_enc_config_default(interface, cfg, 0); if (res) { die("Failed to get config: %s\n", vpx_codec_err_to_string(res)); } printf( "Codec %s\nframes: %d, skip: %d, layers: %d\n" "width %d, height: %d, \n" "num: %d, den: %d, bitrate: %d, \n" "key period: %d \n", vpx_codec_iface_name(interface), number_frames_to_code, number_frames_to_skip, number_spatial_layers, width, height, timebase_num, timebase_den, bitrate, key_period); // Do minimal check at the application level. Encoder parameters will be // checked internally check_parameters(); cfg->rc_target_bitrate = bitrate; cfg->g_w = width; cfg->g_h = height; cfg->g_timebase.num = timebase_num; cfg->g_timebase.den = timebase_den; cfg->ss_number_layers = number_spatial_layers; } static void set_default_configuration(vpx_codec_enc_cfg_t *cfg) { /* Real time parameters */ cfg->rc_dropframe_thresh = 0; cfg->rc_end_usage = VPX_CBR; cfg->rc_resize_allowed = 0; cfg->rc_min_quantizer = 33; cfg->rc_max_quantizer = 33; cfg->rc_undershoot_pct = 100; cfg->rc_overshoot_pct = 15; cfg->rc_buf_initial_sz = 500; cfg->rc_buf_optimal_sz = 600; cfg->rc_buf_sz = 1000; /* Enable error resilient mode */ cfg->g_error_resilient = 1; cfg->g_lag_in_frames = 0; /* Disable automatic keyframe placement */ cfg->kf_mode = VPX_KF_DISABLED; cfg->kf_min_dist = cfg->kf_max_dist = 3000; } static void initialize_codec(vpx_codec_ctx_t *codec, vpx_codec_enc_cfg_t *cfg) { int max_intra_size_pct; /* Initialize codec */ if (vpx_codec_enc_init(codec, interface, cfg, VPX_CODEC_USE_PSNR)) die_codec(codec, "Failed to initialize encoder"); vpx_codec_control(codec, VP9E_SET_SVC, 1); /* Cap CPU & first I-frame size */ vpx_codec_control(codec, VP8E_SET_CPUUSED, 1); vpx_codec_control(codec, VP8E_SET_STATIC_THRESHOLD, 1); vpx_codec_control(codec, VP8E_SET_NOISE_SENSITIVITY, 1); vpx_codec_control(codec, VP8E_SET_TOKEN_PARTITIONS, 1); max_intra_size_pct = (int)(((double)cfg->rc_buf_optimal_sz * 0.5) * ((double)cfg->g_timebase.den / cfg->g_timebase.num) / 10.0); /* printf ("max_intra_size_pct=%d\n", max_intra_size_pct); */ vpx_codec_control(codec, VP8E_SET_MAX_INTRA_BITRATE_PCT, max_intra_size_pct); } static int calculate_layer(int frame_cnt, int number_spatial_layers) { if (frame_cnt == 0) return 0; else return (frame_cnt + number_spatial_layers - 1) % number_spatial_layers; } static void switch_to_layer(int layer, unsigned int initial_width, unsigned int initial_height, vpx_codec_ctx_t *codec) { // Set layer size int scaling_factor_num[MAX_LAYERS] = {2, 1, 4, 2, 1}; int scaling_factor_den[MAX_LAYERS] = {9, 3, 9, 3, 1}; int quantizer[MAX_LAYERS] = {60, 53, 39, 33, 27}; unsigned int current_width; unsigned int current_height; current_width = initial_width * scaling_factor_num[layer + 5 - number_spatial_layers] / scaling_factor_den[layer + 5 - number_spatial_layers]; current_height = initial_height * scaling_factor_num[layer + 5 - number_spatial_layers] / scaling_factor_den[layer + 5 - number_spatial_layers]; current_width += current_width % 2; current_height += current_height % 2; vpx_codec_control(codec, VP9E_SET_WIDTH, ¤t_width); vpx_codec_control(codec, VP9E_SET_HEIGHT, ¤t_height); // Set layer context vpx_codec_control(codec, VP9E_SET_LAYER, &layer); vpx_codec_control(codec, VP9E_SET_MAX_Q, quantizer[layer + 5 - number_spatial_layers]); vpx_codec_control(codec, VP9E_SET_MIN_Q, quantizer[layer + 5 - number_spatial_layers]); } static int get_flag(int is_I_frame_in_layer, int layer, ENCODING_MODE mode) { // First layer switch (mode) { case INTER_LAYER_PREDICTION_I: if (is_I_frame_in_layer && layer == 0) return VPX_EFLAG_FORCE_KF; if (layer == 0) return VP8_EFLAG_NO_UPD_GF | VP8_EFLAG_NO_UPD_ARF | VP8_EFLAG_NO_REF_GF | VP8_EFLAG_NO_REF_ARF; else if (is_I_frame_in_layer) return VP8_EFLAG_NO_UPD_GF | VP8_EFLAG_NO_UPD_ARF | VP8_EFLAG_NO_REF_GF | VP8_EFLAG_NO_REF_LAST; else return VP8_EFLAG_NO_UPD_GF | VP8_EFLAG_NO_UPD_ARF | VP8_EFLAG_NO_REF_GF | VP8_EFLAG_NO_REF_ARF; break; case INTER_LAYER_PREDICTION_IP: if (is_I_frame_in_layer && layer == 0) return VPX_EFLAG_FORCE_KF; if (layer == 0) return VP8_EFLAG_NO_UPD_GF | VP8_EFLAG_NO_UPD_ARF | VP8_EFLAG_NO_REF_GF | VP8_EFLAG_NO_REF_ARF; else if (is_I_frame_in_layer) return VP8_EFLAG_NO_UPD_GF | VP8_EFLAG_NO_UPD_ARF | VP8_EFLAG_NO_REF_GF | VP8_EFLAG_NO_REF_LAST; else return VP8_EFLAG_NO_UPD_GF | VP8_EFLAG_NO_UPD_ARF | VP8_EFLAG_NO_REF_GF; break; case USE_GOLDEN_FRAME: if (is_I_frame_in_layer && layer == 0) return VPX_EFLAG_FORCE_KF; if (2 * number_spatial_layers - NUM_BUFFERS <= layer) { if (layer == 0) return VP8_EFLAG_NO_UPD_GF | VP8_EFLAG_NO_UPD_ARF | VP8_EFLAG_NO_REF_ARF; else if (is_I_frame_in_layer) return VP8_EFLAG_NO_UPD_ARF | VP8_EFLAG_NO_REF_GF | VP8_EFLAG_NO_REF_LAST; else return VP8_EFLAG_NO_UPD_GF | VP8_EFLAG_NO_UPD_ARF; } else { if (layer == 0) return VP8_EFLAG_NO_UPD_GF | VP8_EFLAG_NO_UPD_ARF | VP8_EFLAG_NO_REF_GF | VP8_EFLAG_NO_REF_ARF; else if (is_I_frame_in_layer) return VP8_EFLAG_NO_UPD_GF | VP8_EFLAG_NO_UPD_ARF | VP8_EFLAG_NO_REF_GF | VP8_EFLAG_NO_REF_LAST; else return VP8_EFLAG_NO_UPD_GF | VP8_EFLAG_NO_UPD_ARF | VP8_EFLAG_NO_REF_GF | VP8_EFLAG_NO_REF_ARF; } break; default: return VPX_EFLAG_FORCE_KF; } } int main(int argc, char **argv) { FILE *infile, *outfile[MAX_LAYERS]; vpx_codec_ctx_t codec; vpx_codec_enc_cfg_t cfg; int frame_cnt = 0; vpx_image_t raw; int frame_avail = 1; int got_data = 0; int i; int frames_in_layer[MAX_LAYERS] = {0}; clock_t before; clock_t after; int pts = 0; /* PTS starts at 0 */ int frame_duration = 1; /* 1 timebase tick per frame */ parse_command_line(argc, argv, &cfg); // Allocate image buffer if (!vpx_img_alloc(&raw, VPX_IMG_FMT_I420, cfg.g_w, cfg.g_h, 32)) die("Failed to allocate image", cfg.g_w, cfg.g_h); set_default_configuration(&cfg); /* Open input file */ if (!(infile = fopen(input_filename, "rb"))) die("Failed to open %s for reading", argv[1]); /* Open output file */ for (i = 0; i < number_spatial_layers; i++) { char file_name[512]; snprintf(file_name, sizeof(file_name), "%s_%d.ivf", output_filename, i); if (!(outfile[i] = fopen(file_name, "wb"))) die("Failed to open %s for writing", file_name); write_ivf_file_header(outfile[i], &cfg, 0); } initialize_codec(&codec, &cfg); // skip initial frames for (i = 0; i < number_frames_to_skip; i++) { read_frame(infile, &raw); } before = clock(); // Encoding frames while ((frame_avail || got_data) && frame_cnt <= number_frames_to_code * number_spatial_layers) { int flags = 0; vpx_codec_iter_t iter = NULL; const vpx_codec_cx_pkt_t *pkt; int layer = calculate_layer(frame_cnt, number_spatial_layers); int is_I_frame_in_layer = (((frame_cnt - 1) / number_spatial_layers % key_period) == 0); int is_dummy = (frame_cnt == 0); if (is_dummy) { // Dummy frame flags = VPX_EFLAG_FORCE_KF; frame_avail = read_dummy_frame(&raw); } else { // Regular frame // Read a new frame only at the base layer if (layer == 0) frame_avail = read_frame(infile, &raw); switch_to_layer(layer, cfg.g_w, cfg.g_h, &codec); flags = get_flag(is_I_frame_in_layer, layer, INTER_LAYER_PREDICTION_I); } // Actual Encoding if (vpx_codec_encode(&codec, frame_avail ? &raw : NULL, pts, 1, flags, VPX_DL_REALTIME)) die_codec(&codec, "Failed to encode frame"); got_data = 0; // Process data / Get PSNR statistics while ((pkt = vpx_codec_get_cx_data(&codec, &iter))) { got_data = 1; switch (pkt->kind) { case VPX_CODEC_CX_FRAME_PKT: for (i = layer; i < number_spatial_layers; i++) { write_ivf_frame_header(outfile[i], pkt); (void)fwrite(pkt->data.frame.buf, 1, pkt->data.frame.sz, outfile[i]); frames_in_layer[i]++; } break; case VPX_CODEC_PSNR_PKT: if (frame_cnt != 0) printf( "Processed Frame %d, layer %d, PSNR(Total/Y/U/V): " "%2.3f %2.3f %2.3f %2.3f \n", (frame_cnt - 1) / number_spatial_layers + 1, layer, pkt->data.psnr.psnr[0], pkt->data.psnr.psnr[1], pkt->data.psnr.psnr[2], pkt->data.psnr.psnr[3]); break; default: break; } } frame_cnt++; // TODO(ivan): Modify ts later if(!layer) pts += frame_duration; } // end while after = clock(); printf("Processed %d frames in different resolutions in %ld ms.\n", frame_cnt - 1, (int)(after - before) / (CLOCKS_PER_SEC / 1000)); fclose(infile); if (vpx_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec"); /* Try to rewrite the output file headers with the actual frame count */ for (i = 0; i < number_spatial_layers; i++) { if (!fseek(outfile[i], 0, SEEK_SET)) { write_ivf_file_header(outfile[i], &cfg, frames_in_layer[i]); } fclose(outfile[i]); } return EXIT_SUCCESS; }