Move media-related IPC message definitions from content/common/ to content/common/media.

BUG=none
TEST=compiles

Review URL: http://codereview.chromium.org/7170007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@89502 0039d316-1c4b-4281-b951-d872f2087c98

4 files changed, 252 insertions, 0 deletions

diff --git a/content/common/media/OWNERS b/content/common/media/OWNERS
new file mode 100644
index 0000000..d37c12f
--- /dev/null
+++ b/content/common/media/OWNERS
@@ -0,0 +1,9 @@
+acolwell@chromium.org
+annacc@chromium.org
+ddorwin@chormium.org
+fischman@chromium.org
+imasaki@chromium.org
+scherkus@chromium.org
+sjl@chromium.org
+vrk@chromium.org
+wjia@chromium.org
diff --git a/content/common/media/audio_messages.h b/content/common/media/audio_messages.h
new file mode 100644
index 0000000..41da486
--- /dev/null
+++ b/content/common/media/audio_messages.h
@@ -0,0 +1,164 @@
+// Copyright (c) 2011 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.
+
+// IPC messages for the audio.
+// Multiply-included message file, hence no include guard.
+
+#include "base/shared_memory.h"
+#include "base/sync_socket.h"
+#include "content/common/media/audio_stream_state.h"
+#include "ipc/ipc_message_macros.h"
+#include "media/audio/audio_buffers_state.h"
+#include "media/audio/audio_parameters.h"
+
+#define IPC_MESSAGE_START AudioMsgStart
+
+IPC_ENUM_TRAITS(AudioStreamState)
+IPC_ENUM_TRAITS(AudioParameters::Format)
+IPC_ENUM_TRAITS(ChannelLayout)
+
+IPC_STRUCT_TRAITS_BEGIN(AudioBuffersState)
+  IPC_STRUCT_TRAITS_MEMBER(pending_bytes)
+  IPC_STRUCT_TRAITS_MEMBER(hardware_delay_bytes)
+  IPC_STRUCT_TRAITS_MEMBER(timestamp)
+IPC_STRUCT_TRAITS_END()
+
+IPC_STRUCT_TRAITS_BEGIN(AudioParameters)
+  IPC_STRUCT_TRAITS_MEMBER(format)
+  IPC_STRUCT_TRAITS_MEMBER(channel_layout)
+  IPC_STRUCT_TRAITS_MEMBER(sample_rate)
+  IPC_STRUCT_TRAITS_MEMBER(bits_per_sample)
+  IPC_STRUCT_TRAITS_MEMBER(samples_per_packet)
+  IPC_STRUCT_TRAITS_MEMBER(channels)
+IPC_STRUCT_TRAITS_END()
+
+// Messages sent from the browser to the renderer.
+
+// Sent by AudioRendererHost to renderer to request an audio packet.
+IPC_MESSAGE_ROUTED2(AudioMsg_RequestPacket,
+                    int /* stream id */,
+                    AudioBuffersState)
+
+// Tell the renderer process that the audio stream has been created, renderer
+// process would be given a ShareMemoryHandle that it should write to from
+// then on.
+IPC_MESSAGE_ROUTED3(AudioMsg_NotifyStreamCreated,
+                    int /* stream id */,
+                    base::SharedMemoryHandle /* handle */,
+                    uint32 /* length */)
+
+// Tell the renderer process that a low latency audio stream has been created,
+// renderer process would be given a SyncSocket that it should write to from
+// then on.
+#if defined(OS_WIN)
+IPC_MESSAGE_ROUTED4(AudioMsg_NotifyLowLatencyStreamCreated,
+                    int /* stream id */,
+                    base::SharedMemoryHandle /* handle */,
+                    base::SyncSocket::Handle /* socket handle */,
+                    uint32 /* length */)
+#else
+IPC_MESSAGE_ROUTED4(AudioMsg_NotifyLowLatencyStreamCreated,
+                    int /* stream id */,
+                    base::SharedMemoryHandle /* handle */,
+                    base::FileDescriptor /* socket handle */,
+                    uint32 /* length */)
+#endif
+
+// Tell the renderer process that a low latency audio input stream has been
+// created, renderer process would be given a SyncSocket that it should read
+// from from then on.
+#if defined(OS_WIN)
+IPC_MESSAGE_ROUTED4(AudioInputMsg_NotifyLowLatencyStreamCreated,
+                    int /* stream id */,
+                    base::SharedMemoryHandle /* handle */,
+                    base::SyncSocket::Handle /* socket handle */,
+                    uint32 /* length */)
+#else
+IPC_MESSAGE_ROUTED4(AudioInputMsg_NotifyLowLatencyStreamCreated,
+                    int /* stream id */,
+                    base::SharedMemoryHandle /* handle */,
+                    base::FileDescriptor /* socket handle */,
+                    uint32 /* length */)
+#endif
+
+// Notification message sent from AudioRendererHost to renderer for state
+// update after the renderer has requested a Create/Start/Close.
+IPC_MESSAGE_ROUTED2(AudioMsg_NotifyStreamStateChanged,
+                    int /* stream id */,
+                    AudioStreamState /* new state */)
+
+IPC_MESSAGE_ROUTED2(AudioMsg_NotifyStreamVolume,
+                    int /* stream id */,
+                    double /* volume */)
+
+IPC_MESSAGE_ROUTED2(AudioInputMsg_NotifyStreamVolume,
+                    int /* stream id */,
+                    double /* volume */)
+
+// Messages sent from the renderer to the browser.
+
+// Request that got sent to browser for creating an audio output stream
+IPC_MESSAGE_ROUTED3(AudioHostMsg_CreateStream,
+                    int /* stream_id */,
+                    AudioParameters /* params */,
+                    bool /* low-latency */)
+
+// Request that got sent to browser for creating an audio input stream
+IPC_MESSAGE_ROUTED3(AudioInputHostMsg_CreateStream,
+                    int /* stream_id */,
+                    AudioParameters /* params */,
+                    bool /* low-latency */)
+
+// Tell the browser the audio buffer prepared for stream
+// (render_view_id, stream_id) is filled and is ready to be consumed.
+IPC_MESSAGE_ROUTED2(AudioHostMsg_NotifyPacketReady,
+                    int /* stream_id */,
+                    uint32 /* packet size */)
+
+// Start buffering and play the audio stream specified by
+// (render_view_id, stream_id).
+IPC_MESSAGE_ROUTED1(AudioHostMsg_PlayStream,
+                    int /* stream_id */)
+
+// Start recording the audio input stream specified by
+// (render_view_id, stream_id).
+IPC_MESSAGE_ROUTED1(AudioInputHostMsg_RecordStream,
+                    int /* stream_id */)
+
+// Pause the audio stream specified by (render_view_id, stream_id).
+IPC_MESSAGE_ROUTED1(AudioHostMsg_PauseStream,
+                    int /* stream_id */)
+
+// Discard all buffered audio data for the specified audio stream.
+IPC_MESSAGE_ROUTED1(AudioHostMsg_FlushStream,
+                    int /* stream_id */)
+
+// Close an audio stream specified by (render_view_id, stream_id).
+IPC_MESSAGE_ROUTED1(AudioHostMsg_CloseStream,
+                    int /* stream_id */)
+
+// Close an audio input stream specified by (render_view_id, stream_id).
+IPC_MESSAGE_ROUTED1(AudioInputHostMsg_CloseStream,
+                    int /* stream_id */)
+
+// Get audio volume of the stream specified by (render_view_id, stream_id).
+IPC_MESSAGE_ROUTED1(AudioHostMsg_GetVolume,
+                    int /* stream_id */)
+
+// Get audio volume of the input stream specified by
+// (render_view_id, stream_id).
+IPC_MESSAGE_ROUTED1(AudioInputHostMsg_GetVolume,
+                    int /* stream_id */)
+
+// Set audio volume of the stream specified by (render_view_id, stream_id).
+// TODO(hclam): change this to vector if we have channel numbers other than 2.
+IPC_MESSAGE_ROUTED2(AudioHostMsg_SetVolume,
+                    int /* stream_id */,
+                    double /* volume */)
+
+// Set audio volume of the input stream specified by
+// (render_view_id, stream_id).
+IPC_MESSAGE_ROUTED2(AudioInputHostMsg_SetVolume,
+                    int /* stream_id */,
+                    double /* volume */)
diff --git a/content/common/media/audio_stream_state.h b/content/common/media/audio_stream_state.h
new file mode 100644
index 0000000..fd42db5
--- /dev/null
+++ b/content/common/media/audio_stream_state.h
@@ -0,0 +1,18 @@
+// Copyright (c) 2011 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.
+
+#ifndef CONTENT_COMMON_MEDIA_AUDIO_STREAM_STATE_H_
+#define CONTENT_COMMON_MEDIA_AUDIO_STREAM_STATE_H_
+#pragma once
+
+// Current status of the audio output stream in the browser process. Browser
+// sends information about the current playback state and error to the
+// renderer process using this type.
+enum AudioStreamState {
+  kAudioStreamPlaying,
+  kAudioStreamPaused,
+  kAudioStreamError
+};
+
+#endif  // CONTENT_COMMON_MEDIA_AUDIO_STREAM_STATE_H_
diff --git a/content/common/media/video_capture_messages.h b/content/common/media/video_capture_messages.h
new file mode 100644
index 0000000..7b5b8d9
--- /dev/null
+++ b/content/common/media/video_capture_messages.h
@@ -0,0 +1,61 @@
+// Copyright (c) 2011 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 "content/common/common_param_traits.h"
+#include "ipc/ipc_message_macros.h"
+#include "media/video/capture/video_capture.h"
+
+#define IPC_MESSAGE_START VideoCaptureMsgStart
+
+IPC_ENUM_TRAITS(media::VideoCapture::State)
+
+IPC_STRUCT_TRAITS_BEGIN(media::VideoCaptureParams)
+  IPC_STRUCT_TRAITS_MEMBER(width)
+  IPC_STRUCT_TRAITS_MEMBER(height)
+  IPC_STRUCT_TRAITS_MEMBER(frame_per_second)
+  IPC_STRUCT_TRAITS_MEMBER(session_id)
+IPC_STRUCT_TRAITS_END()
+
+// Notify the renderer process about the state update such as
+// Start/Pause/Stop.
+IPC_MESSAGE_ROUTED2(VideoCaptureMsg_StateChanged,
+                    int /* device id */,
+                    media::VideoCapture::State /* new state */)
+
+// Tell the renderer process that a new buffer is allocated for video capture.
+IPC_MESSAGE_ROUTED4(VideoCaptureMsg_NewBuffer,
+                    int /* device id */,
+                    base::SharedMemoryHandle /* handle */,
+                    int /* length */,
+                    int /* buffer_id */)
+
+// Tell the renderer process that a buffer is available from video capture.
+IPC_MESSAGE_ROUTED3(VideoCaptureMsg_BufferReady,
+                    int /* device id */,
+                    int /* buffer_id */,
+                    base::Time /* timestamp */)
+
+// Tell the renderer process the width, height and frame rate the camera use.
+IPC_MESSAGE_ROUTED2(VideoCaptureMsg_DeviceInfo,
+                    int /* device_id */,
+                    media::VideoCaptureParams)
+
+// Start the video capture specified by (routing_id, device_id).
+IPC_MESSAGE_ROUTED2(VideoCaptureHostMsg_Start,
+                    int /* device_id */,
+                    media::VideoCaptureParams)
+
+// Pause the video capture specified by (routing_id, device_id).
+IPC_MESSAGE_ROUTED1(VideoCaptureHostMsg_Pause,
+                    int /* device_id */)
+
+// Close the video capture specified by (routing_id, device_id).
+IPC_MESSAGE_ROUTED1(VideoCaptureHostMsg_Stop,
+                    int /* device_id */)
+
+// Tell the browser process that the video frame buffer |handle| is ready for
+// device (routing_id, device_id) to fill up.
+IPC_MESSAGE_ROUTED2(VideoCaptureHostMsg_BufferReady,
+                    int /* device_id */,
+                    int /* buffer_id */)