add libvpx 89cc6825 (matching current chrome canary) from repo https://chromium.googlesource.com/webm/libvpx

libs/libvpx/examples/postproc.c

@@ -0,0 +1,138 @@
+/*
+ *  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.
+ */
+
+// Postprocessing Decoder
+// ======================
+//
+// This example adds postprocessing to the simple decoder loop.
+//
+// Initializing Postprocessing
+// ---------------------------
+// You must inform the codec that you might request postprocessing at
+// initialization time. This is done by passing the VPX_CODEC_USE_POSTPROC
+// flag to `vpx_codec_dec_init`. If the codec does not support
+// postprocessing, this call will return VPX_CODEC_INCAPABLE. For
+// demonstration purposes, we also fall back to default initialization if
+// the codec does not provide support.
+//
+// Using Adaptive Postprocessing
+// -----------------------------
+// VP6 provides "adaptive postprocessing." It will automatically select the
+// best postprocessing filter on a frame by frame basis based on the amount
+// of time remaining before the user's specified deadline expires. The
+// special value 0 indicates that the codec should take as long as
+// necessary to provide the best quality frame. This example gives the
+// codec 15ms (15000us) to return a frame. Remember that this is a soft
+// deadline, and the codec may exceed it doing its regular processing. In
+// these cases, no additional postprocessing will be done.
+//
+// Codec Specific Postprocessing Controls
+// --------------------------------------
+// Some codecs provide fine grained controls over their built-in
+// postprocessors. VP8 is one example. The following sample code toggles
+// postprocessing on and off every 15 frames.
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "vpx/vp8dx.h"
+#include "vpx/vpx_decoder.h"
+
+#include "../tools_common.h"
+#include "../video_reader.h"
+#include "./vpx_config.h"
+
+static const char *exec_name;
+
+void usage_exit(void) {
+  fprintf(stderr, "Usage: %s <infile> <outfile>\n", exec_name);
+  exit(EXIT_FAILURE);
+}
+
+int main(int argc, char **argv) {
+  int frame_cnt = 0;
+  FILE *outfile = NULL;
+  vpx_codec_ctx_t codec;
+  vpx_codec_err_t res;
+  VpxVideoReader *reader = NULL;
+  const VpxInterface *decoder = NULL;
+  const VpxVideoInfo *info = NULL;
+
+  exec_name = argv[0];
+
+  if (argc != 3)
+    die("Invalid number of arguments.");
+
+  reader = vpx_video_reader_open(argv[1]);
+  if (!reader)
+    die("Failed to open %s for reading.", argv[1]);
+
+  if (!(outfile = fopen(argv[2], "wb")))
+    die("Failed to open %s for writing", argv[2]);
+
+  info = vpx_video_reader_get_info(reader);
+
+  decoder = get_vpx_decoder_by_fourcc(info->codec_fourcc);
+  if (!decoder)
+    die("Unknown input codec.");
+
+  printf("Using %s\n", vpx_codec_iface_name(decoder->codec_interface()));
+
+  res = vpx_codec_dec_init(&codec, decoder->codec_interface(), NULL,
+                           VPX_CODEC_USE_POSTPROC);
+  if (res == VPX_CODEC_INCAPABLE)
+    die_codec(&codec, "Postproc not supported by this decoder.");
+
+  if (res)
+    die_codec(&codec, "Failed to initialize decoder.");
+
+  while (vpx_video_reader_read_frame(reader)) {
+    vpx_codec_iter_t iter = NULL;
+    vpx_image_t *img = NULL;
+    size_t frame_size = 0;
+    const unsigned char *frame = vpx_video_reader_get_frame(reader,
+                                                            &frame_size);
+
+    ++frame_cnt;
+
+    if (frame_cnt % 30 == 1) {
+      vp8_postproc_cfg_t pp = {0, 0, 0};
+
+    if (vpx_codec_control(&codec, VP8_SET_POSTPROC, &pp))
+      die_codec(&codec, "Failed to turn off postproc.");
+    } else if (frame_cnt % 30 == 16) {
+      vp8_postproc_cfg_t pp = {VP8_DEBLOCK | VP8_DEMACROBLOCK | VP8_MFQE,
+                               4, 0};
+      if (vpx_codec_control(&codec, VP8_SET_POSTPROC, &pp))
+        die_codec(&codec, "Failed to turn on postproc.");
+    };
+
+    // Decode the frame with 15ms deadline
+    if (vpx_codec_decode(&codec, frame, (unsigned int)frame_size, NULL, 15000))
+      die_codec(&codec, "Failed to decode frame");
+
+    while ((img = vpx_codec_get_frame(&codec, &iter)) != NULL) {
+      vpx_img_write(img, outfile);
+    }
+  }
+
+  printf("Processed %d frames.\n", frame_cnt);
+  if (vpx_codec_destroy(&codec))
+    die_codec(&codec, "Failed to destroy codec");
+
+  printf("Play: ffplay -f rawvideo -pix_fmt yuv420p -s %dx%d %s\n",
+         info->frame_width, info->frame_height, argv[2]);
+
+  vpx_video_reader_close(reader);
+
+  fclose(outfile);
+  return EXIT_SUCCESS;
+}