Add WebMAudioClient & WebMVideoClient to remove FFmpeg dependencies in WebMStreamParser.

BUG=108756
TEST=All existing ChunkDemuxer & PipelineIntegrationTests still pass.


Review URL: https://chromiumcodereview.appspot.com/12674009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@189461 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 154 insertions, 0 deletions

diff --git a/media/webm/webm_video_client.cc b/media/webm/webm_video_client.cc
new file mode 100644
index 0000000..bb4b111
--- /dev/null
+++ b/media/webm/webm_video_client.cc
@@ -0,0 +1,154 @@
+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "media/webm/webm_video_client.h"
+
+#include "media/base/video_decoder_config.h"
+#include "media/webm/webm_constants.h"
+
+namespace media {
+
+WebMVideoClient::WebMVideoClient(const LogCB& log_cb)
+    : log_cb_(log_cb) {
+  Reset();
+}
+
+WebMVideoClient::~WebMVideoClient() {
+}
+
+void WebMVideoClient::Reset() {
+  pixel_width_ = -1;
+  pixel_height_ = -1;
+  crop_bottom_ = -1;
+  crop_top_ = -1;
+  crop_left_ = -1;
+  crop_right_ = -1;
+  display_width_ = -1;
+  display_height_ = -1;
+  display_unit_ = -1;
+}
+
+bool WebMVideoClient::InitializeConfig(
+    const std::string& codec_id, const std::vector<uint8>& codec_private,
+    bool is_encrypted, VideoDecoderConfig* config) {
+  DCHECK(config);
+
+  VideoCodec video_codec = kUnknownVideoCodec;
+  VideoCodecProfile profile = VIDEO_CODEC_PROFILE_UNKNOWN;
+  if (codec_id == "V_VP8") {
+    video_codec = kCodecVP8;
+    profile = VP8PROFILE_MAIN;
+  } else {
+    MEDIA_LOG(log_cb_) << "Unsupported video codec_id " << codec_id;
+    return false;
+  }
+
+  if (pixel_width_ <= 0 || pixel_height_ <= 0)
+    return false;
+
+  // Set crop and display unit defaults if these elements are not present.
+  if (crop_bottom_ == -1)
+    crop_bottom_ = 0;
+
+  if (crop_top_ == -1)
+    crop_top_ = 0;
+
+  if (crop_left_ == -1)
+    crop_left_ = 0;
+
+  if (crop_right_ == -1)
+    crop_right_ = 0;
+
+  if (display_unit_ == -1)
+    display_unit_ = 0;
+
+  gfx::Size coded_size(pixel_width_, pixel_height_);
+  gfx::Rect visible_rect(crop_top_, crop_left_,
+                         pixel_width_ - (crop_left_ + crop_right_),
+                         pixel_height_ - (crop_top_ + crop_bottom_));
+  gfx::Size natural_size = coded_size;
+  if (display_unit_ == 0) {
+    if (display_width_ <= 0)
+      display_width_ = pixel_width_;
+    if (display_height_ <= 0)
+      display_height_ = pixel_height_;
+    natural_size = gfx::Size(display_width_, display_height_);
+  } else if (display_unit_ == 3) {
+    if (display_width_ <= 0 || display_height_ <= 0)
+      return false;
+    natural_size = gfx::Size(display_width_, display_height_);
+  } else {
+    MEDIA_LOG(log_cb_) << "Unsupported display unit type " << display_unit_;
+    return false;
+  }
+  const uint8* extra_data = NULL;
+  size_t extra_data_size = 0;
+  if (codec_private.size() > 0) {
+    extra_data = &codec_private[0];
+    extra_data_size = codec_private.size();
+  }
+
+  config->Initialize(
+      video_codec, profile, VideoFrame::YV12, coded_size,
+      visible_rect, natural_size, extra_data, extra_data_size,
+      is_encrypted, true);
+  return config->IsValidConfig();
+}
+
+bool WebMVideoClient::OnUInt(int id, int64 val) {
+  int64* dst = NULL;
+
+  switch (id) {
+    case kWebMIdPixelWidth:
+      dst = &pixel_width_;
+      break;
+    case kWebMIdPixelHeight:
+      dst = &pixel_height_;
+      break;
+    case kWebMIdPixelCropTop:
+      dst = &crop_top_;
+      break;
+    case kWebMIdPixelCropBottom:
+      dst = &crop_bottom_;
+      break;
+    case kWebMIdPixelCropLeft:
+      dst = &crop_left_;
+      break;
+    case kWebMIdPixelCropRight:
+      dst = &crop_right_;
+      break;
+    case kWebMIdDisplayWidth:
+      dst = &display_width_;
+      break;
+    case kWebMIdDisplayHeight:
+      dst = &display_height_;
+      break;
+    case kWebMIdDisplayUnit:
+      dst = &display_unit_;
+      break;
+    default:
+      return true;
+  }
+
+  if (*dst != -1) {
+    MEDIA_LOG(log_cb_) << "Multiple values for id " << std::hex << id
+                       << " specified (" << *dst << " and " << val << ")";
+    return false;
+  }
+
+  *dst = val;
+  return true;
+}
+
+bool WebMVideoClient::OnBinary(int id, const uint8* data, int size) {
+  // Accept binary fields we don't care about for now.
+  return true;
+}
+
+bool WebMVideoClient::OnFloat(int id, double val) {
+  // Accept float fields we don't care about for now.
+  return true;
+}
+
+}  // namespace media