libvpx: Pull from upstream

source/libvpx/examples/vp8_set_maps.c

-/*
- *  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 <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#define VPX_CODEC_DISABLE_COMPAT 1
-#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() {
-  fprintf(stderr, "Usage: %s <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 = {0};
-
-  roi.rows = cfg->g_h / 16;
-  roi.cols = cfg->g_w / 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};
-
-  map.rows = cfg->g_h / 16;
-  map.cols = cfg->g_w / 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};
-
-  map.rows = cfg->g_h / 16;
-  map.cols = cfg->g_w / 16;
-  map.active_map = NULL;
-
-  if (vpx_codec_control(codec, VP8E_SET_ACTIVEMAP, &map))
-    die_codec(codec, "Failed to set active map");
-}
-
-static void encode_frame(vpx_codec_ctx_t *codec,
-                         vpx_image_t *img,
-                         int frame_index,
-                         VpxVideoWriter *writer) {
-  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) {
-    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);
-    }
-  }
-}
-
-int main(int argc, char **argv) {
-  FILE *infile = NULL;
-  vpx_codec_ctx_t codec = {0};
-  vpx_codec_enc_cfg_t cfg = {0};
-  int frame_count = 0;
-  vpx_image_t raw = {0};
-  vpx_codec_err_t res;
-  VpxVideoInfo info = {0};
-  VpxVideoWriter *writer = NULL;
-  const VpxInterface *encoder = NULL;
-  const int fps = 2;        // TODO(dkovalev) add command line argument
-  const int bitrate = 200;   // kbit/s TODO(dkovalev) add command line argument
-
-  exec_name = argv[0];
-
-  if (argc != 5)
-    die("Invalid number of arguments");
-
-  encoder = get_vpx_encoder_by_name("vp8");  // only vp8 for now
-  if (!encoder)
-    die("Unsupported codec.");
-
-  info.codec_fourcc = encoder->fourcc;
-  info.frame_width = strtol(argv[1], NULL, 0);
-  info.frame_height = strtol(argv[2], 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->interface()));
-
-  res = vpx_codec_enc_config_default(encoder->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 = bitrate;
-
-  writer = vpx_video_writer_open(argv[4], kContainerIVF, &info);
-  if (!writer)
-    die("Failed to open %s for writing.", argv[4]);
-
-  if (!(infile = fopen(argv[3], "rb")))
-    die("Failed to open %s for reading.", argv[3]);
-
-  if (vpx_codec_enc_init(&codec, encoder->interface(), &cfg, 0))
-    die_codec(&codec, "Failed to initialize encoder");
-
-  while (vpx_img_read(&raw, infile)) {
-    ++frame_count;
-
-    if (frame_count == 22) {
-      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);
-  }
-  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;
-}