diff options
Diffstat (limited to 'content/common')
| -rw-r--r-- | content/common/audio_messages.h | 115 | ||||
| -rw-r--r-- | content/common/audio_stream_state.h | 18 | ||||
| -rw-r--r-- | content/common/content_message_generator.h | 1 |
3 files changed, 134 insertions, 0 deletions
diff --git a/content/common/audio_messages.h b/content/common/audio_messages.h new file mode 100644 index 0000000..e4c995493 --- /dev/null +++ b/content/common/audio_messages.h @@ -0,0 +1,115 @@ +// 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/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_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(channels) + IPC_STRUCT_TRAITS_MEMBER(sample_rate) + IPC_STRUCT_TRAITS_MEMBER(bits_per_sample) + IPC_STRUCT_TRAITS_MEMBER(samples_per_packet) +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 + +// 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 */) + +// 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 */) + +// 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 */) + +// 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 */) + +// Get audio volume of the stream specified by (render_view_id, stream_id). +IPC_MESSAGE_ROUTED1(AudioHostMsg_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 */) diff --git a/content/common/audio_stream_state.h b/content/common/audio_stream_state.h new file mode 100644 index 0000000..9557772 --- /dev/null +++ b/content/common/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_AUDIO_STREAM_STATE_H_ +#define CONTENT_COMMON_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_AUDIO_STREAM_STATE_H_ diff --git a/content/common/content_message_generator.h b/content/common/content_message_generator.h index f244c90..3c8448d 100644 --- a/content/common/content_message_generator.h +++ b/content/common/content_message_generator.h @@ -5,6 +5,7 @@ // Multiply-included file, hence no include guard. #include "content/common/appcache_messages.h" +#include "content/common/audio_messages.h" #include "content/common/child_process_messages.h" #include "content/common/clipboard_messages.h" #include "content/common/database_messages.h" |