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Diffstat (limited to 'media/libaom/src/examples/set_maps.c')
| -rw-r--r-- | media/libaom/src/examples/set_maps.c | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/media/libaom/src/examples/set_maps.c b/media/libaom/src/examples/set_maps.c new file mode 100644 index 000000000..9aeb96e43 --- /dev/null +++ b/media/libaom/src/examples/set_maps.c @@ -0,0 +1,208 @@ +/* + * 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; +} |