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// 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_CONTROL2(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_CONTROL3(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_CONTROL4(AudioMsg_NotifyLowLatencyStreamCreated,
int /* stream id */,
base::SharedMemoryHandle /* handle */,
base::SyncSocket::Handle /* socket handle */,
uint32 /* length */)
#else
IPC_MESSAGE_CONTROL4(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_CONTROL4(AudioInputMsg_NotifyLowLatencyStreamCreated,
int /* stream id */,
base::SharedMemoryHandle /* handle */,
base::SyncSocket::Handle /* socket handle */,
uint32 /* length */)
#else
IPC_MESSAGE_CONTROL4(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_CONTROL2(AudioMsg_NotifyStreamStateChanged,
int /* stream id */,
AudioStreamState /* new state */)
// Notification message sent from browser to renderer for state update.
IPC_MESSAGE_CONTROL2(AudioInputMsg_NotifyStreamStateChanged,
int /* stream id */,
AudioStreamState /* new state */)
IPC_MESSAGE_CONTROL2(AudioMsg_NotifyStreamVolume,
int /* stream id */,
double /* volume */)
IPC_MESSAGE_CONTROL2(AudioInputMsg_NotifyStreamVolume,
int /* stream id */,
double /* volume */)
IPC_MESSAGE_CONTROL2(AudioInputMsg_NotifyDeviceStarted,
int /* stream id */,
int /* device_index */)
// Messages sent from the renderer to the browser.
// Request that got sent to browser for creating an audio output stream
IPC_MESSAGE_CONTROL3(AudioHostMsg_CreateStream,
int /* stream_id */,
AudioParameters /* params */,
bool /* low-latency */)
// Request that got sent to browser for creating an audio input stream
IPC_MESSAGE_CONTROL3(AudioInputHostMsg_CreateStream,
int /* stream_id */,
AudioParameters /* params */,
bool /* low-latency */)
// Tell the browser the audio buffer prepared for stream (stream_id) is
// filled and is ready to be consumed.
IPC_MESSAGE_CONTROL2(AudioHostMsg_NotifyPacketReady,
int /* stream_id */,
uint32 /* packet size */)
// Start buffering and play the audio stream specified by stream_id.
IPC_MESSAGE_CONTROL1(AudioHostMsg_PlayStream,
int /* stream_id */)
// Start recording the audio input stream specified by stream_id.
IPC_MESSAGE_CONTROL1(AudioInputHostMsg_RecordStream,
int /* stream_id */)
// Pause the audio stream specified by stream_id.
IPC_MESSAGE_CONTROL1(AudioHostMsg_PauseStream,
int /* stream_id */)
// Discard all buffered audio data for the specified audio stream.
IPC_MESSAGE_CONTROL1(AudioHostMsg_FlushStream,
int /* stream_id */)
// Close an audio stream specified by stream_id.
IPC_MESSAGE_CONTROL1(AudioHostMsg_CloseStream,
int /* stream_id */)
// Close an audio input stream specified by stream_id.
IPC_MESSAGE_CONTROL1(AudioInputHostMsg_CloseStream,
int /* stream_id */)
// Get audio volume of the stream specified by stream_id.
IPC_MESSAGE_CONTROL1(AudioHostMsg_GetVolume,
int /* stream_id */)
// Get audio volume of the input stream specified by
// (render_view_id, stream_id).
IPC_MESSAGE_CONTROL1(AudioInputHostMsg_GetVolume,
int /* stream_id */)
// Set audio volume of the stream specified by stream_id.
// TODO(hclam): change this to vector if we have channel numbers other than 2.
IPC_MESSAGE_CONTROL2(AudioHostMsg_SetVolume,
int /* stream_id */,
double /* volume */)
// Set audio volume of the input stream specified by stream_id.
IPC_MESSAGE_CONTROL2(AudioInputHostMsg_SetVolume,
int /* stream_id */,
double /* volume */)
// Start the device referenced by the session_id for the input stream specified
// by stream_id.
IPC_MESSAGE_CONTROL2(AudioInputHostMsg_StartDevice,
int /* stream_id */,
int /* session_id */)
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