Introduce some buffering into the cast media pipeline.

chromecast/media/cma/base/mock_frame_provider.cc

+// Copyright 2014 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 "chromecast/media/cma/base/mock_frame_provider.h"
+
+#include "base/bind.h"
+#include "base/location.h"
+#include "base/message_loop/message_loop_proxy.h"
+#include "base/time/time.h"
+#include "chromecast/media/cma/base/decoder_buffer_base.h"
+#include "chromecast/media/cma/base/frame_generator_for_test.h"
+#include "media/base/audio_decoder_config.h"
+#include "media/base/decoder_buffer.h"
+#include "media/base/video_decoder_config.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/gfx/rect.h"
+#include "ui/gfx/size.h"
+
+namespace chromecast {
+namespace media {
+
+MockFrameProvider::MockFrameProvider() {
+}
+
+MockFrameProvider::~MockFrameProvider() {
+}
+
+void MockFrameProvider::Configure(
+    const std::vector<bool>& delayed_task_pattern,
+    scoped_ptr<FrameGeneratorForTest> frame_generator) {
+  delayed_task_pattern_ = delayed_task_pattern;
+  pattern_idx_ = 0;
+
+  frame_generator_.reset(frame_generator.release());
+}
+
+void MockFrameProvider::Read(const ReadCB& read_cb) {
+  bool delayed = delayed_task_pattern_[pattern_idx_];
+  pattern_idx_ = (pattern_idx_ + 1) % delayed_task_pattern_.size();
+
+  if (delayed) {
+    base::MessageLoopProxy::current()->PostDelayedTask(
+        FROM_HERE,
+        base::Bind(&MockFrameProvider::DoRead,
+                   base::Unretained(this), read_cb),
+        base::TimeDelta::FromMilliseconds(1));
+  } else {
+    base::MessageLoopProxy::current()->PostTask(
+        FROM_HERE,
+        base::Bind(&MockFrameProvider::DoRead,
+                   base::Unretained(this), read_cb));
+  }
+}
+
+void MockFrameProvider::Flush(const base::Closure& flush_cb) {
+  flush_cb.Run();
+}
+
+void MockFrameProvider::DoRead(const ReadCB& read_cb) {
+  bool has_config = frame_generator_->HasDecoderConfig();
+
+  scoped_refptr<DecoderBufferBase> buffer(frame_generator_->Generate());
+  ASSERT_TRUE(buffer.get());
+
+  ::media::AudioDecoderConfig audio_config;
+  ::media::VideoDecoderConfig video_config;
+  if (has_config) {
+    gfx::Size coded_size(640, 480);
+    gfx::Rect visible_rect(640, 480);
+    gfx::Size natural_size(640, 480);
+    video_config = ::media::VideoDecoderConfig(
+        ::media::kCodecH264,
+        ::media::VIDEO_CODEC_PROFILE_UNKNOWN,
+        ::media::VideoFrame::YV12,
+        coded_size,
+        visible_rect,
+        natural_size,
+        NULL, 0,
+        false);
+
+    audio_config = ::media::AudioDecoderConfig(
+      ::media::kCodecAAC,
+      ::media::kSampleFormatS16,
+      ::media::CHANNEL_LAYOUT_STEREO,
+      44100,
+      NULL, 0,
+      false);
+  }
+
+  read_cb.Run(buffer, audio_config, video_config);
+}
+
+}  // namespace media
+}  // namespace chromecast