Import aom library

This is the reference implementation for the Alliance for Open Media's av1 video code.

The commit used was 4d668d7feb1f8abd809d1bca0418570a7f142a36.

third_party/aom/examples/set_maps.c

@@ -0,0 +1,210 @@
+/*
+ * 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/aomcx.h"
+#include "aom/aom_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_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, AOM_DL_GOOD_QUALITY);
+  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 = 30;
+  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 == 11) {
+      set_active_map(&cfg, &codec);
+    } else if (frame_count == 22) {
+      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;
+}