content/common/media/audio_messages.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 // IPC messages for the audio.
   6 // Multiply-included message file, hence no include guard.
   7
   8 #include <string>
   9
  10 #include "base/basictypes.h"
  11 #include "base/shared_memory.h"
  12 #include "base/sync_socket.h"
  13 #include "content/common/content_export.h"
  14 #include "content/common/media/audio_param_traits.h"
  15 #include "ipc/ipc_message_macros.h"
  16 #include "media/audio/audio_buffers_state.h"
  17 #include "media/audio/audio_input_ipc.h"
  18 #include "media/audio/audio_output_ipc.h"
  19 #include "media/audio/audio_parameters.h"
  20
  21 #undef IPC_MESSAGE_EXPORT
  22 #define IPC_MESSAGE_EXPORT CONTENT_EXPORT
  23 #define IPC_MESSAGE_START AudioMsgStart
  24
  25 IPC_ENUM_TRAITS(media::AudioInputIPCDelegate::State)
  26 IPC_ENUM_TRAITS(media::AudioOutputIPCDelegate::State)
  27
  28 // Messages sent from the browser to the renderer.
  29
  30 // Tell the renderer process that an audio stream has been created.
  31 // The renderer process is given a shared memory handle for the audio data
  32 // buffer it shares with the browser process. It is also given a SyncSocket that
  33 // it uses to communicate with the browser process about the state of the
  34 // buffered audio data.
  35 #if defined(OS_WIN)
  36 IPC_MESSAGE_CONTROL4(AudioMsg_NotifyStreamCreated,
  37                      int /* stream id */,
  38                      base::SharedMemoryHandle /* handle */,
  39                      base::SyncSocket::Handle /* socket handle */,
  40                      uint32 /* length */)
  41 #else
  42 IPC_MESSAGE_CONTROL4(AudioMsg_NotifyStreamCreated,
  43                      int /* stream id */,
  44                      base::SharedMemoryHandle /* handle */,
  45                      base::FileDescriptor /* socket handle */,
  46                      uint32 /* length */)
  47 #endif
  48
  49 // Tell the renderer process that an audio input stream has been created.
  50 // The renderer process would be given a SyncSocket that it should read
  51 // from from then on.
  52 #if defined(OS_WIN)
  53 IPC_MESSAGE_CONTROL4(AudioInputMsg_NotifyStreamCreated,
  54                      int /* stream id */,
  55                      base::SharedMemoryHandle /* handle */,
  56                      base::SyncSocket::Handle /* socket handle */,
  57                      uint32 /* length */)
  58 #else
  59 IPC_MESSAGE_CONTROL4(AudioInputMsg_NotifyStreamCreated,
  60                      int /* stream id */,
  61                      base::SharedMemoryHandle /* handle */,
  62                      base::FileDescriptor /* socket handle */,
  63                      uint32 /* length */)
  64 #endif
  65
  66 // Notification message sent from AudioRendererHost to renderer for state
  67 // update after the renderer has requested a Create/Start/Close.
  68 IPC_MESSAGE_CONTROL2(AudioMsg_NotifyStreamStateChanged,
  69                      int /* stream id */,
  70                      media::AudioOutputIPCDelegate::State /* new state */)
  71
  72 // Notification message sent from browser to renderer for state update.
  73 IPC_MESSAGE_CONTROL2(AudioInputMsg_NotifyStreamStateChanged,
  74                      int /* stream id */,
  75                      media::AudioInputIPCDelegate::State /* new state */)
  76
  77 IPC_MESSAGE_CONTROL2(AudioInputMsg_NotifyStreamVolume,
  78                      int /* stream id */,
  79                      double /* volume */)
  80
  81 IPC_MESSAGE_CONTROL2(AudioInputMsg_NotifyDeviceStarted,
  82                      int /* stream id */,
  83                      std::string /* device_id */)
  84
  85 // Messages sent from the renderer to the browser.
  86
  87 // Request that got sent to browser for creating an audio output stream
  88 IPC_MESSAGE_CONTROL3(AudioHostMsg_CreateStream,
  89                      int /* stream_id */,
  90                      media::AudioParameters, /* params */
  91                      int /* input_channels */)
  92
  93 // Request that got sent to browser for creating an audio input stream
  94 IPC_MESSAGE_CONTROL4(AudioInputHostMsg_CreateStream,
  95                      int /* stream_id */,
  96                      media::AudioParameters /* params */,
  97                      std::string /* device_id */,
  98                      bool /* automatic_gain_control */)
  99
 100 // Indicate that audio for a stream is produced by the specified render view.
 101 IPC_MESSAGE_CONTROL2(AudioHostMsg_AssociateStreamWithProducer,
 102                      int /* stream_id */,
 103                      int /* render_view_id */)
 104
 105 // Indicate that audio for a stream is consumed by the specified render view.
 106 IPC_MESSAGE_CONTROL2(AudioInputHostMsg_AssociateStreamWithConsumer,
 107                      int /* stream_id */,
 108                      int /* render_view_id */)
 109
 110 // Start buffering and play the audio stream specified by stream_id.
 111 IPC_MESSAGE_CONTROL1(AudioHostMsg_PlayStream,
 112                      int /* stream_id */)
 113
 114 // Start recording the audio input stream specified by stream_id.
 115 IPC_MESSAGE_CONTROL1(AudioInputHostMsg_RecordStream,
 116                      int /* stream_id */)
 117
 118 // Pause the audio stream specified by stream_id.
 119 IPC_MESSAGE_CONTROL1(AudioHostMsg_PauseStream,
 120                      int /* stream_id */)
 121
 122 // Discard all buffered audio data for the specified audio stream.
 123 IPC_MESSAGE_CONTROL1(AudioHostMsg_FlushStream,
 124                      int /* stream_id */)
 125
 126 // Close an audio stream specified by stream_id.
 127 IPC_MESSAGE_CONTROL1(AudioHostMsg_CloseStream,
 128                      int /* stream_id */)
 129
 130 // Close an audio input stream specified by stream_id.
 131 IPC_MESSAGE_CONTROL1(AudioInputHostMsg_CloseStream,
 132                      int /* stream_id */)
 133
 134 // Set audio volume of the stream specified by stream_id.
 135 // TODO(hclam): change this to vector if we have channel numbers other than 2.
 136 IPC_MESSAGE_CONTROL2(AudioHostMsg_SetVolume,
 137                      int /* stream_id */,
 138                      double /* volume */)
 139
 140 // Set audio volume of the input stream specified by stream_id.
 141 IPC_MESSAGE_CONTROL2(AudioInputHostMsg_SetVolume,
 142                      int /* stream_id */,
 143                      double /* volume */)
 144
 145 // Start the device referenced by the session_id for the input stream specified
 146 // by stream_id.
 147 IPC_MESSAGE_CONTROL2(AudioInputHostMsg_StartDevice,
 148                      int /* stream_id */,
 149                      int /* session_id */)