Define EncodedVideoSource and RtcCapturedEncodingVideoCapturer.

content/common/media/encoded_video_source_messages.h

Index: content/common/media/encoded_video_source_messages.h
diff --git a/content/common/media/encoded_video_source_messages.h b/content/common/media/encoded_video_source_messages.h
new file mode 100644
index 0000000000000000000000000000000000000000..337e0ed0c56c4c687fd9ae2451e8c1820cc39df5
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+++ b/content/common/media/encoded_video_source_messages.h
@@ -0,0 +1,126 @@
+// Copyright (c) 2012 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 "ipc/ipc_message_macros.h"
+#include "media/video/encoded_video_source.h"
+#include "media/video/video_encode_types.h"
+
+#undef IPC_MESSAGE_EXPORT
+#define IPC_MESSAGE_EXPORT CONTENT_EXPORT
+#define IPC_MESSAGE_START EncodedVideoSourceMsgStart
+
+#if !defined(OS_ANDROID)
+IPC_ENUM_TRAITS(media::VideoCodec)
+#endif  // !defined(OS_ANDROID)
+
+IPC_STRUCT_TRAITS_BEGIN(media::VideoEncodingConfig)
+  IPC_STRUCT_TRAITS_MEMBER(codec_type)
+  IPC_STRUCT_TRAITS_MEMBER(codec_name)
+  IPC_STRUCT_TRAITS_MEMBER(max_resolution)
+  IPC_STRUCT_TRAITS_MEMBER(max_frames_per_second)
+  IPC_STRUCT_TRAITS_MEMBER(max_bitrate)
+IPC_STRUCT_TRAITS_END()
+
+IPC_STRUCT_TRAITS_BEGIN(media::RuntimeVideoEncodingParameters)
+  IPC_STRUCT_TRAITS_MEMBER(target_bitrate)
+  IPC_STRUCT_TRAITS_MEMBER(max_bitrate)
+  IPC_STRUCT_TRAITS_MEMBER(frames_per_second)
+IPC_STRUCT_TRAITS_END()
+
+IPC_STRUCT_TRAITS_BEGIN(media::VideoEncodingParameters)
+  IPC_STRUCT_TRAITS_MEMBER(codec_name)
+  IPC_STRUCT_TRAITS_MEMBER(resolution)
+  IPC_STRUCT_TRAITS_MEMBER(runtime_params)
+IPC_STRUCT_TRAITS_END()
+
+IPC_STRUCT_TRAITS_BEGIN(media::BufferEncodingMetadata)
+  IPC_STRUCT_TRAITS_MEMBER(timestamp)
+  IPC_STRUCT_TRAITS_MEMBER(key_frame)
+IPC_STRUCT_TRAITS_END()
+
+// Need to typedef BitstreamBufferMap in order to prevent the IPC message macros
+// from choking on the comma.
+typedef std::map<int, base::SharedMemoryHandle> BitstreamBufferMap;
+
+//------------------------------------------------------------------------------
+// Renderer Source Messages
+// These are messages from the Renderer to the Browser process.
+
+// Queries the encoding capabilities for the device. A successful request
+// results in EncoderVideoSourceMessage_CapabilitiesAvailable message.
+IPC_MESSAGE_CONTROL1(EncodedVideoSourceHostMsg_GetCapabilities,
+                     int /* device_id */)
+
+// Opens a bitstream with specific parameters. A successful request results in
+// beginning of streaming and EncoderVideoSourceMsg_BitstreamOpened message.
+// A failed request triggers EncodedVideoSourceMsg_BitstreamClosed message. As
+// this set of messages is designed to work with existing device, device_id is
+// determined on the basis which device is providing the encoded video source
+// functionality. Only one bitstream can be opened for a given device.
+IPC_MESSAGE_CONTROL2(EncodedVideoSourceHostMsg_OpenBitstream,
+                     int /* device_id */,
+                     media::VideoEncodingParameters /* params */)
+
+// Stops streaming a bitstream. When Browser has finalized the bitstream it will
+// trigger EncodedVideoSourceMsg_BitstreamClosed message back to Renderer.
+// Renderer must be prepared to receive EncodedVideoSourceMsg_BitstreamReady
+// messages until it receives the EncodedVideoSourceMsg_BitstreamClosed message.
+IPC_MESSAGE_CONTROL1(EncodedVideoSourceHostMsg_CloseBitstream,
+                    int /* device_id */)
+
+// Sets a stream's bitstream configuration. Will always result in
+// EncodedVideoSourceMsg_BitstreamConfigChanged message containing
+// currently active parameters, regardless of whether this call succeeded or
+// not.
+IPC_MESSAGE_CONTROL2(EncodedVideoSourceHostMsg_TryConfigureBitstream,
+                     int /* device_id */,
+                     media::RuntimeVideoEncodingParameters /* params */)
+
+// Notifies that the data within a buffer has been processed and it can be
+// reused to encode upcoming bitstream.
+IPC_MESSAGE_CONTROL2(EncodedVideoSourceHostMsg_BitstreamBufferConsumed,
+                     int /* device_id */,
+                     int /* buffer_id */)
+
+//------------------------------------------------------------------------------
+// Renderer Messages
+// These are messages from the Browser to the Renderer process.
+
+// Reports the encoding capabilities of the device.
+IPC_MESSAGE_CONTROL2(EncodedVideoSourceMsg_CapabilitiesAvailable,
+                     int /* device id */,
+                     media::VideoEncodingCapabilities /* capabilities */)
+
+// Acknowledges a request to open an encoded video bitstream. When this message
+// occurs, bitstream can be considered to be streaming, and Renderer should be
+// ready to start accepting EncodedVideoSourceMsg_BitstreamReady messages and
+// buffers contained within them. Shared memory buffers used to deliver the
+// bitstream are assigned with buffer ids as specified by the buffers parameter.
+IPC_MESSAGE_CONTROL3(EncodedVideoSourceMsg_BitstreamOpened,
+                     int /* device_id */,
+                     media::VideoEncodingParameters /* params */,
+                     BitstreamBufferMap /* buffers */)
+
+// Acknowledges a request to close an encoded video bitstream.
+IPC_MESSAGE_CONTROL1(EncodedVideoSourceMsg_BitstreamClosed,
+                     int /* device_id */)
+
+// Informs the clients of the current encoding parameters, regardless of whether
+// the previous request to change them has been successful or not. This is
+// called usually in response to EncodedVideoSourceHostMsg_TryConfigureBitstream
+// at runtime, but can occur also as a result of config change initiated by
+// encoder or other clients in the system, e.g. if there are multiple clients
+// and bitstream config change is requested from one client, all clients should
+// be prepared to handle the configuration change.
+IPC_MESSAGE_CONTROL2(EncodedVideoSourceMsg_BitstreamConfigChanged,
+                     int /* device_id */,
+                     media::RuntimeVideoEncodingParameters /* current_params */)
+
+// Indicates that a bitstream buffer is available for the stream. The value of
+// |size| indicates the amount of valid bitstream data (in bytes).
+IPC_MESSAGE_CONTROL4(EncodedVideoSourceMsg_BitstreamReady,
+                     int /* device_id */,
+                     int /* buffer_id */,
+                     int /* size */,
+                     media::BufferEncodingMetadata /* metadata */)