| /* |
| * 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. |
| */ |
| |
| // VP8 Set Active and ROI Maps |
| // =========================== |
| // |
| // This is an example demonstrating how to control the VP8 encoder's |
| // ROI and Active maps. |
| // |
| // ROI (Reigon of Interest) maps are a way for the application to assign |
| // each macroblock in the image to a region, and then set quantizer and |
| // filtering parameters on that image. |
| // |
| // Active maps are a way for the application to specify on a |
| // macroblock-by-macroblock basis whether there is any activity in that |
| // macroblock. |
| // |
| // |
| // Configuration |
| // ------------- |
| // An ROI map is set on frame 22. If the width of the image in macroblocks |
| // is evenly divisble by 4, then the output will appear to have distinct |
| // columns, where the quantizer, loopfilter, and static threshold differ |
| // from column to column. |
| // |
| // An active map is set on frame 33. If the width of the image in macroblocks |
| // is evenly divisble by 4, then the output will appear to have distinct |
| // columns, where one column will have motion and the next will not. |
| // |
| // The active map is cleared on frame 44. |
| // |
| // Observing The Effects |
| // --------------------- |
| // Use the `simple_decoder` example to decode this sample, and observe |
| // the change in the image at frames 22, 33, and 44. |
| |
| #include <assert.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include "vpx/vp8cx.h" |
| #include "vpx/vpx_encoder.h" |
| |
| #include "../tools_common.h" |
| #include "../video_writer.h" |
| |
| static const char *exec_name; |
| |
| void usage_exit(void) { |
| fprintf(stderr, "Usage: %s <codec> <width> <height> <infile> <outfile>\n", |
| exec_name); |
| exit(EXIT_FAILURE); |
| } |
| |
| static void set_roi_map(const vpx_codec_enc_cfg_t *cfg, |
| vpx_codec_ctx_t *codec) { |
| unsigned int i; |
| vpx_roi_map_t roi; |
| memset(&roi, 0, sizeof(roi)); |
| |
| roi.rows = (cfg->g_h + 15) / 16; |
| roi.cols = (cfg->g_w + 15) / 16; |
| |
| roi.delta_q[0] = 0; |
| roi.delta_q[1] = -2; |
| roi.delta_q[2] = -4; |
| roi.delta_q[3] = -6; |
| |
| roi.delta_lf[0] = 0; |
| roi.delta_lf[1] = 1; |
| roi.delta_lf[2] = 2; |
| roi.delta_lf[3] = 3; |
| |
| roi.static_threshold[0] = 1500; |
| roi.static_threshold[1] = 1000; |
| roi.static_threshold[2] = 500; |
| roi.static_threshold[3] = 0; |
| |
| roi.roi_map = (uint8_t *)malloc(roi.rows * roi.cols); |
| for (i = 0; i < roi.rows * roi.cols; ++i) roi.roi_map[i] = i % 4; |
| |
| if (vpx_codec_control(codec, VP8E_SET_ROI_MAP, &roi)) |
| die_codec(codec, "Failed to set ROI map"); |
| |
| free(roi.roi_map); |
| } |
| |
| static void set_active_map(const vpx_codec_enc_cfg_t *cfg, |
| vpx_codec_ctx_t *codec) { |
| unsigned int i; |
| vpx_active_map_t map = { 0, 0, 0 }; |
| |
| map.rows = (cfg->g_h + 15) / 16; |
| map.cols = (cfg->g_w + 15) / 16; |
| |
| map.active_map = (uint8_t *)malloc(map.rows * map.cols); |
| for (i = 0; i < map.rows * map.cols; ++i) map.active_map[i] = i % 2; |
| |
| if (vpx_codec_control(codec, VP8E_SET_ACTIVEMAP, &map)) |
| die_codec(codec, "Failed to set active map"); |
| |
| free(map.active_map); |
| } |
| |
| static void unset_active_map(const vpx_codec_enc_cfg_t *cfg, |
| vpx_codec_ctx_t *codec) { |
| vpx_active_map_t map = { 0, 0, 0 }; |
| |
| map.rows = (cfg->g_h + 15) / 16; |
| map.cols = (cfg->g_w + 15) / 16; |
| map.active_map = NULL; |
| |
| if (vpx_codec_control(codec, VP8E_SET_ACTIVEMAP, &map)) |
| die_codec(codec, "Failed to set active map"); |
| } |
| |
| static int encode_frame(vpx_codec_ctx_t *codec, vpx_image_t *img, |
| int frame_index, VpxVideoWriter *writer) { |
| int got_pkts = 0; |
| vpx_codec_iter_t iter = NULL; |
| const vpx_codec_cx_pkt_t *pkt = NULL; |
| const vpx_codec_err_t res = |
| vpx_codec_encode(codec, img, frame_index, 1, 0, VPX_DL_GOOD_QUALITY); |
| if (res != VPX_CODEC_OK) die_codec(codec, "Failed to encode frame"); |
| |
| while ((pkt = vpx_codec_get_cx_data(codec, &iter)) != NULL) { |
| got_pkts = 1; |
| |
| if (pkt->kind == VPX_CODEC_CX_FRAME_PKT) { |
| const int keyframe = (pkt->data.frame.flags & VPX_FRAME_IS_KEY) != 0; |
| if (!vpx_video_writer_write_frame(writer, pkt->data.frame.buf, |
| pkt->data.frame.sz, |
| pkt->data.frame.pts)) { |
| die_codec(codec, "Failed to write compressed frame"); |
| } |
| |
| printf(keyframe ? "K" : "."); |
| fflush(stdout); |
| } |
| } |
| |
| return got_pkts; |
| } |
| |
| int main(int argc, char **argv) { |
| FILE *infile = NULL; |
| vpx_codec_ctx_t codec; |
| vpx_codec_enc_cfg_t cfg; |
| int frame_count = 0; |
| vpx_image_t raw; |
| vpx_codec_err_t res; |
| VpxVideoInfo info; |
| VpxVideoWriter *writer = NULL; |
| const VpxInterface *encoder = NULL; |
| const int fps = 2; // TODO(dkovalev) add command line argument |
| const double bits_per_pixel_per_frame = 0.067; |
| |
| exec_name = argv[0]; |
| if (argc != 6) die("Invalid number of arguments"); |
| |
| memset(&info, 0, sizeof(info)); |
| |
| encoder = get_vpx_encoder_by_name(argv[1]); |
| if (encoder == NULL) { |
| die("Unsupported codec."); |
| } |
| assert(encoder != NULL); |
| info.codec_fourcc = encoder->fourcc; |
| info.frame_width = (int)strtol(argv[2], NULL, 0); |
| info.frame_height = (int)strtol(argv[3], NULL, 0); |
| info.time_base.numerator = 1; |
| info.time_base.denominator = fps; |
| |
| if (info.frame_width <= 0 || info.frame_height <= 0 || |
| (info.frame_width % 2) != 0 || (info.frame_height % 2) != 0) { |
| die("Invalid frame size: %dx%d", info.frame_width, info.frame_height); |
| } |
| |
| if (!vpx_img_alloc(&raw, VPX_IMG_FMT_I420, info.frame_width, |
| info.frame_height, 1)) { |
| die("Failed to allocate image."); |
| } |
| |
| printf("Using %s\n", vpx_codec_iface_name(encoder->codec_interface())); |
| |
| res = vpx_codec_enc_config_default(encoder->codec_interface(), &cfg, 0); |
| if (res) die_codec(&codec, "Failed to get default codec config."); |
| |
| cfg.g_w = info.frame_width; |
| cfg.g_h = info.frame_height; |
| cfg.g_timebase.num = info.time_base.numerator; |
| cfg.g_timebase.den = info.time_base.denominator; |
| cfg.rc_target_bitrate = |
| (unsigned int)(bits_per_pixel_per_frame * cfg.g_w * cfg.g_h * fps / 1000); |
| cfg.g_lag_in_frames = 0; |
| |
| writer = vpx_video_writer_open(argv[5], kContainerIVF, &info); |
| if (!writer) die("Failed to open %s for writing.", argv[5]); |
| |
| if (!(infile = fopen(argv[4], "rb"))) |
| die("Failed to open %s for reading.", argv[4]); |
| |
| if (vpx_codec_enc_init(&codec, encoder->codec_interface(), &cfg, 0)) |
| die("Failed to initialize encoder"); |
| |
| // Encode frames. |
| while (vpx_img_read(&raw, infile)) { |
| ++frame_count; |
| |
| if (frame_count == 22 && encoder->fourcc == VP8_FOURCC) { |
| set_roi_map(&cfg, &codec); |
| } else if (frame_count == 33) { |
| set_active_map(&cfg, &codec); |
| } else if (frame_count == 44) { |
| unset_active_map(&cfg, &codec); |
| } |
| |
| encode_frame(&codec, &raw, frame_count, writer); |
| } |
| |
| // Flush encoder. |
| while (encode_frame(&codec, NULL, -1, writer)) { |
| } |
| |
| printf("\n"); |
| fclose(infile); |
| printf("Processed %d frames.\n", frame_count); |
| |
| vpx_img_free(&raw); |
| if (vpx_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec."); |
| |
| vpx_video_writer_close(writer); |
| |
| return EXIT_SUCCESS; |
| } |