| /* |
| * Copyright (c) 2016, Alliance for Open Media. All rights reserved |
| * |
| * This source code is subject to the terms of the BSD 2 Clause License and |
| * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License |
| * was not distributed with this source code in the LICENSE file, you can |
| * obtain it at www.aomedia.org/license/software. If the Alliance for Open |
| * Media Patent License 1.0 was not distributed with this source code in the |
| * PATENTS file, you can obtain it at www.aomedia.org/license/patent. |
| */ |
| |
| // AOM Set Active and ROI Maps |
| // =========================== |
| // |
| // This is an example demonstrating how to control the AOM 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 "aom/aom_encoder.h" |
| #include "aom/aomcx.h" |
| #include "common/tools_common.h" |
| #include "common/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_active_map(const aom_codec_enc_cfg_t *cfg, |
| aom_codec_ctx_t *codec) { |
| unsigned int i; |
| aom_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 (aom_codec_control(codec, AOME_SET_ACTIVEMAP, &map)) |
| die_codec(codec, "Failed to set active map"); |
| |
| free(map.active_map); |
| } |
| |
| static void unset_active_map(const aom_codec_enc_cfg_t *cfg, |
| aom_codec_ctx_t *codec) { |
| aom_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 (aom_codec_control(codec, AOME_SET_ACTIVEMAP, &map)) |
| die_codec(codec, "Failed to set active map"); |
| } |
| |
| static int encode_frame(aom_codec_ctx_t *codec, aom_image_t *img, |
| int frame_index, AvxVideoWriter *writer) { |
| int got_pkts = 0; |
| aom_codec_iter_t iter = NULL; |
| const aom_codec_cx_pkt_t *pkt = NULL; |
| const aom_codec_err_t res = aom_codec_encode(codec, img, frame_index, 1, 0); |
| if (res != AOM_CODEC_OK) die_codec(codec, "Failed to encode frame"); |
| |
| while ((pkt = aom_codec_get_cx_data(codec, &iter)) != NULL) { |
| got_pkts = 1; |
| |
| if (pkt->kind == AOM_CODEC_CX_FRAME_PKT) { |
| const int keyframe = (pkt->data.frame.flags & AOM_FRAME_IS_KEY) != 0; |
| if (!aom_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; |
| aom_codec_ctx_t codec; |
| aom_codec_enc_cfg_t cfg; |
| int frame_count = 0; |
| const int limit = 15; |
| aom_image_t raw; |
| aom_codec_err_t res; |
| AvxVideoInfo info; |
| AvxVideoWriter *writer = NULL; |
| const AvxInterface *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_aom_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 (!aom_img_alloc(&raw, AOM_IMG_FMT_I420, info.frame_width, |
| info.frame_height, 1)) { |
| die("Failed to allocate image."); |
| } |
| |
| printf("Using %s\n", aom_codec_iface_name(encoder->codec_interface())); |
| |
| res = aom_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 = aom_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 (aom_codec_enc_init(&codec, encoder->codec_interface(), &cfg, 0)) |
| die_codec(&codec, "Failed to initialize encoder"); |
| |
| // Encode frames. |
| while (aom_img_read(&raw, infile) && frame_count < limit) { |
| ++frame_count; |
| |
| if (frame_count == 5) { |
| set_active_map(&cfg, &codec); |
| } else if (frame_count == 11) { |
| 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); |
| |
| aom_img_free(&raw); |
| if (aom_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec."); |
| |
| aom_video_writer_close(writer); |
| |
| return EXIT_SUCCESS; |
| } |