src/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 "base/basictypes.h"
   9 #include "base/memory/shared_memory.h"
  10 #include "base/sync_socket.h"
  11 #include "content/common/content_export.h"
  12 #include "content/common/media/media_param_traits.h"
  13 #include "ipc/ipc_message_macros.h"
  14 #include "media/audio/audio_buffers_state.h"
  15 #include "media/audio/audio_input_ipc.h"
  16 #include "media/audio/audio_output_ipc.h"
  17 #include "media/audio/audio_parameters.h"
  18
  19 #undef IPC_MESSAGE_EXPORT
  20 #define IPC_MESSAGE_EXPORT CONTENT_EXPORT
  21 #define IPC_MESSAGE_START AudioMsgStart
  22
  23 IPC_ENUM_TRAITS(media::AudioInputIPCDelegate::State)
  24 IPC_ENUM_TRAITS(media::AudioOutputIPCDelegate::State)
  25
  26 IPC_STRUCT_BEGIN(AudioInputHostMsg_CreateStream_Config)
  27   IPC_STRUCT_MEMBER(media::AudioParameters, params)
  28   IPC_STRUCT_MEMBER(bool, automatic_gain_control)
  29   IPC_STRUCT_MEMBER(uint32, shared_memory_count)
  30 IPC_STRUCT_END()
  31
  32 // Messages sent from the browser to the renderer.
  33
  34 // Tell the renderer process that an audio stream has been created.
  35 // The renderer process is given a shared memory handle for the audio data
  36 // buffer it shares with the browser process. It is also given a SyncSocket that
  37 // it uses to communicate with the browser process about the state of the
  38 // buffered audio data.
  39 #if defined(OS_WIN)
  40 IPC_MESSAGE_CONTROL4(AudioMsg_NotifyStreamCreated,
  41                      int /* stream id */,
  42                      base::SharedMemoryHandle /* handle */,
  43                      base::SyncSocket::Handle /* socket handle */,
  44                      uint32 /* length */)
  45 #else
  46 IPC_MESSAGE_CONTROL4(AudioMsg_NotifyStreamCreated,
  47                      int /* stream id */,
  48                      base::SharedMemoryHandle /* handle */,
  49                      base::FileDescriptor /* socket handle */,
  50                      uint32 /* length */)
  51 #endif
  52
  53 // Tell the renderer process that an audio input stream has been created.
  54 // The renderer process would be given a SyncSocket that it should read
  55 // from from then on. It is also given number of segments in shared memory.
  56 #if defined(OS_WIN)
  57 IPC_MESSAGE_CONTROL5(AudioInputMsg_NotifyStreamCreated,
  58                      int /* stream id */,
  59                      base::SharedMemoryHandle /* handle */,
  60                      base::SyncSocket::Handle /* socket handle */,
  61                      uint32 /* length */,
  62                      uint32 /* segment count */)
  63 #else
  64 IPC_MESSAGE_CONTROL5(AudioInputMsg_NotifyStreamCreated,
  65                      int /* stream id */,
  66                      base::SharedMemoryHandle /* handle */,
  67                      base::FileDescriptor /* socket handle */,
  68                      uint32 /* length */,
  69                      uint32 /* segment count */)
  70 #endif
  71
  72 // Notification message sent from AudioRendererHost to renderer after an output
  73 // device change has occurred.
  74 IPC_MESSAGE_CONTROL3(AudioMsg_NotifyDeviceChanged,
  75                      int /* stream_id */,
  76                      int /* new_buffer_size */,
  77                      int /* new_sample_rate */)
  78
  79 // Notification message sent from AudioRendererHost to renderer for state
  80 // update after the renderer has requested a Create/Start/Close.
  81 IPC_MESSAGE_CONTROL2(AudioMsg_NotifyStreamStateChanged,
  82                      int /* stream id */,
  83                      media::AudioOutputIPCDelegate::State /* new state */)
  84
  85 // Notification message sent from browser to renderer for state update.
  86 IPC_MESSAGE_CONTROL2(AudioInputMsg_NotifyStreamStateChanged,
  87                      int /* stream id */,
  88                      media::AudioInputIPCDelegate::State /* new state */)
  89
  90 IPC_MESSAGE_CONTROL2(AudioInputMsg_NotifyStreamVolume,
  91                      int /* stream id */,
  92                      double /* volume */)
  93
  94 // Messages sent from the renderer to the browser.
  95
  96 // Request that is sent to the browser for creating an audio output stream.
  97 // |render_view_id| is the routing ID for the render view producing the audio
  98 // data.
  99 IPC_MESSAGE_CONTROL4(AudioHostMsg_CreateStream,
 100                      int /* stream_id */,
 101                      int /* render_view_id */,
 102                      int /* session_id */,
 103                      media::AudioParameters /* params */)
 104
 105 // Request that is sent to the browser for creating an audio input stream.
 106 // |render_view_id| is the routing ID for the render view consuming the audio
 107 // data.
 108 IPC_MESSAGE_CONTROL4(AudioInputHostMsg_CreateStream,
 109                      int /* stream_id */,
 110                      int /* render_view_id */,
 111                      int /* session_id */,
 112                      AudioInputHostMsg_CreateStream_Config)
 113
 114 // Start buffering and play the audio stream specified by stream_id.
 115 IPC_MESSAGE_CONTROL1(AudioHostMsg_PlayStream,
 116                      int /* stream_id */)
 117
 118 // Start recording the audio input stream specified by stream_id.
 119 IPC_MESSAGE_CONTROL1(AudioInputHostMsg_RecordStream,
 120                      int /* stream_id */)
 121
 122 // Pause the audio stream specified by stream_id.
 123 IPC_MESSAGE_CONTROL1(AudioHostMsg_PauseStream,
 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 */)