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| 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 // VP8 Set Active and ROI Maps |
| 13 // =========================== |
| 14 // |
| 15 // This is an example demonstrating how to control the VP8 encoder's |
| 16 // ROI and Active maps. |
| 17 // |
| 18 // ROI (Reigon of Interest) maps are a way for the application to assign |
| 19 // each macroblock in the image to a region, and then set quantizer and |
| 20 // filtering parameters on that image. |
| 21 // |
| 22 // Active maps are a way for the application to specify on a |
| 23 // macroblock-by-macroblock basis whether there is any activity in that |
| 24 // macroblock. |
| 25 // |
| 26 // |
| 27 // Configuration |
| 28 // ------------- |
| 29 // An ROI map is set on frame 22. If the width of the image in macroblocks |
| 30 // is evenly divisble by 4, then the output will appear to have distinct |
| 31 // columns, where the quantizer, loopfilter, and static threshold differ |
| 32 // from column to column. |
| 33 // |
| 34 // An active map is set on frame 33. If the width of the image in macroblocks |
| 35 // is evenly divisble by 4, then the output will appear to have distinct |
| 36 // columns, where one column will have motion and the next will not. |
| 37 // |
| 38 // The active map is cleared on frame 44. |
| 39 // |
| 40 // Observing The Effects |
| 41 // --------------------- |
| 42 // Use the `simple_decoder` example to decode this sample, and observe |
| 43 // the change in the image at frames 22, 33, and 44. |
| 44 |
| 45 #include <stdio.h> |
| 46 #include <stdlib.h> |
| 47 #include <string.h> |
| 48 |
| 49 #define VPX_CODEC_DISABLE_COMPAT 1 |
| 50 #include "vpx/vp8cx.h" |
| 51 #include "vpx/vpx_encoder.h" |
| 52 |
| 53 #include "./tools_common.h" |
| 54 #include "./video_writer.h" |
| 55 |
| 56 static const char *exec_name; |
| 57 |
| 58 void usage_exit() { |
| 59 fprintf(stderr, "Usage: %s <codec> <width> <height> <infile> <outfile>\n", |
| 60 exec_name); |
| 61 exit(EXIT_FAILURE); |
| 62 } |
| 63 |
| 64 static void set_roi_map(const vpx_codec_enc_cfg_t *cfg, |
| 65 vpx_codec_ctx_t *codec) { |
| 66 unsigned int i; |
| 67 vpx_roi_map_t roi = {0}; |
| 68 |
| 69 roi.rows = (cfg->g_h + 15) / 16; |
| 70 roi.cols = (cfg->g_w + 15) / 16; |
| 71 |
| 72 roi.delta_q[0] = 0; |
| 73 roi.delta_q[1] = -2; |
| 74 roi.delta_q[2] = -4; |
| 75 roi.delta_q[3] = -6; |
| 76 |
| 77 roi.delta_lf[0] = 0; |
| 78 roi.delta_lf[1] = 1; |
| 79 roi.delta_lf[2] = 2; |
| 80 roi.delta_lf[3] = 3; |
| 81 |
| 82 roi.static_threshold[0] = 1500; |
| 83 roi.static_threshold[1] = 1000; |
| 84 roi.static_threshold[2] = 500; |
| 85 roi.static_threshold[3] = 0; |
| 86 |
| 87 roi.roi_map = (uint8_t *)malloc(roi.rows * roi.cols); |
| 88 for (i = 0; i < roi.rows * roi.cols; ++i) |
| 89 roi.roi_map[i] = i % 4; |
| 90 |
| 91 if (vpx_codec_control(codec, VP8E_SET_ROI_MAP, &roi)) |
| 92 die_codec(codec, "Failed to set ROI map"); |
| 93 |
| 94 free(roi.roi_map); |
| 95 } |
| 96 |
| 97 static void set_active_map(const vpx_codec_enc_cfg_t *cfg, |
| 98 vpx_codec_ctx_t *codec) { |
| 99 unsigned int i; |
| 100 vpx_active_map_t map = {0}; |
| 101 |
| 102 map.rows = (cfg->g_h + 15) / 16; |
| 103 map.cols = (cfg->g_w + 15) / 16; |
| 104 |
| 105 map.active_map = (uint8_t *)malloc(map.rows * map.cols); |
| 106 for (i = 0; i < map.rows * map.cols; ++i) |
| 107 map.active_map[i] = i % 2; |
| 108 |
| 109 if (vpx_codec_control(codec, VP8E_SET_ACTIVEMAP, &map)) |
| 110 die_codec(codec, "Failed to set active map"); |
| 111 |
| 112 free(map.active_map); |
| 113 } |
| 114 |
| 115 static void unset_active_map(const vpx_codec_enc_cfg_t *cfg, |
| 116 vpx_codec_ctx_t *codec) { |
| 117 vpx_active_map_t map = {0}; |
| 118 |
| 119 map.rows = (cfg->g_h + 15) / 16; |
| 120 map.cols = (cfg->g_w + 15) / 16; |
| 121 map.active_map = NULL; |
| 122 |
| 123 if (vpx_codec_control(codec, VP8E_SET_ACTIVEMAP, &map)) |
| 124 die_codec(codec, "Failed to set active map"); |
| 125 } |
| 126 |
| 127 static void encode_frame(vpx_codec_ctx_t *codec, |
| 128 vpx_image_t *img, |
| 129 int frame_index, |
| 130 VpxVideoWriter *writer) { |
| 131 vpx_codec_iter_t iter = NULL; |
| 132 const vpx_codec_cx_pkt_t *pkt = NULL; |
| 133 const vpx_codec_err_t res = vpx_codec_encode(codec, img, frame_index, 1, 0, |
| 134 VPX_DL_GOOD_QUALITY); |
| 135 if (res != VPX_CODEC_OK) |
| 136 die_codec(codec, "Failed to encode frame"); |
| 137 |
| 138 while ((pkt = vpx_codec_get_cx_data(codec, &iter)) != NULL) { |
| 139 if (pkt->kind == VPX_CODEC_CX_FRAME_PKT) { |
| 140 const int keyframe = (pkt->data.frame.flags & VPX_FRAME_IS_KEY) != 0; |
| 141 if (!vpx_video_writer_write_frame(writer, |
| 142 pkt->data.frame.buf, |
| 143 pkt->data.frame.sz, |
| 144 pkt->data.frame.pts)) { |
| 145 die_codec(codec, "Failed to write compressed frame"); |
| 146 } |
| 147 |
| 148 printf(keyframe ? "K" : "."); |
| 149 fflush(stdout); |
| 150 } |
| 151 } |
| 152 } |
| 153 |
| 154 int main(int argc, char **argv) { |
| 155 FILE *infile = NULL; |
| 156 vpx_codec_ctx_t codec = {0}; |
| 157 vpx_codec_enc_cfg_t cfg = {0}; |
| 158 int frame_count = 0; |
| 159 vpx_image_t raw = {0}; |
| 160 vpx_codec_err_t res; |
| 161 VpxVideoInfo info = {0}; |
| 162 VpxVideoWriter *writer = NULL; |
| 163 const VpxInterface *encoder = NULL; |
| 164 const int fps = 2; // TODO(dkovalev) add command line argument |
| 165 const double bits_per_pixel_per_frame = 0.067; |
| 166 |
| 167 exec_name = argv[0]; |
| 168 |
| 169 if (argc != 6) |
| 170 die("Invalid number of arguments"); |
| 171 |
| 172 encoder = get_vpx_encoder_by_name(argv[1]); |
| 173 if (!encoder) |
| 174 die("Unsupported codec."); |
| 175 |
| 176 info.codec_fourcc = encoder->fourcc; |
| 177 info.frame_width = strtol(argv[2], NULL, 0); |
| 178 info.frame_height = strtol(argv[3], NULL, 0); |
| 179 info.time_base.numerator = 1; |
| 180 info.time_base.denominator = fps; |
| 181 |
| 182 if (info.frame_width <= 0 || |
| 183 info.frame_height <= 0 || |
| 184 (info.frame_width % 2) != 0 || |
| 185 (info.frame_height % 2) != 0) { |
| 186 die("Invalid frame size: %dx%d", info.frame_width, info.frame_height); |
| 187 } |
| 188 |
| 189 if (!vpx_img_alloc(&raw, VPX_IMG_FMT_I420, info.frame_width, |
| 190 info.frame_height, 1)) { |
| 191 die("Failed to allocate image."); |
| 192 } |
| 193 |
| 194 printf("Using %s\n", vpx_codec_iface_name(encoder->interface())); |
| 195 |
| 196 res = vpx_codec_enc_config_default(encoder->interface(), &cfg, 0); |
| 197 if (res) |
| 198 die_codec(&codec, "Failed to get default codec config."); |
| 199 |
| 200 cfg.g_w = info.frame_width; |
| 201 cfg.g_h = info.frame_height; |
| 202 cfg.g_timebase.num = info.time_base.numerator; |
| 203 cfg.g_timebase.den = info.time_base.denominator; |
| 204 cfg.rc_target_bitrate = (unsigned int)(bits_per_pixel_per_frame * cfg.g_w * |
| 205 cfg.g_h * fps / 1000); |
| 206 cfg.g_lag_in_frames = 0; |
| 207 |
| 208 writer = vpx_video_writer_open(argv[5], kContainerIVF, &info); |
| 209 if (!writer) |
| 210 die("Failed to open %s for writing.", argv[5]); |
| 211 |
| 212 if (!(infile = fopen(argv[4], "rb"))) |
| 213 die("Failed to open %s for reading.", argv[4]); |
| 214 |
| 215 if (vpx_codec_enc_init(&codec, encoder->interface(), &cfg, 0)) |
| 216 die_codec(&codec, "Failed to initialize encoder"); |
| 217 |
| 218 while (vpx_img_read(&raw, infile)) { |
| 219 ++frame_count; |
| 220 |
| 221 if (frame_count == 22 && encoder->fourcc == VP8_FOURCC) { |
| 222 set_roi_map(&cfg, &codec); |
| 223 } else if (frame_count == 33) { |
| 224 set_active_map(&cfg, &codec); |
| 225 } else if (frame_count == 44) { |
| 226 unset_active_map(&cfg, &codec); |
| 227 } |
| 228 |
| 229 encode_frame(&codec, &raw, frame_count, writer); |
| 230 } |
| 231 encode_frame(&codec, NULL, -1, writer); |
| 232 printf("\n"); |
| 233 fclose(infile); |
| 234 printf("Processed %d frames.\n", frame_count); |
| 235 |
| 236 vpx_img_free(&raw); |
| 237 if (vpx_codec_destroy(&codec)) |
| 238 die_codec(&codec, "Failed to destroy codec."); |
| 239 |
| 240 vpx_video_writer_close(writer); |
| 241 |
| 242 return EXIT_SUCCESS; |
| 243 } |
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