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_input_ipc.h"
  15 #include "media/audio/audio_output_ipc.h"
  16 #include "media/audio/audio_parameters.h"
  17
  18 #undef IPC_MESSAGE_EXPORT
  19 #define IPC_MESSAGE_EXPORT CONTENT_EXPORT
  20 #define IPC_MESSAGE_START AudioMsgStart
  21
  22 IPC_ENUM_TRAITS_MAX_VALUE(media::AudioInputIPCDelegate::State,
  23                           media::AudioInputIPCDelegate::kStateLast)
  24
  25 IPC_ENUM_TRAITS_MAX_VALUE(media::AudioOutputIPCDelegate::State,
  26                           media::AudioOutputIPCDelegate::kStateLast)
  27
  28 IPC_STRUCT_BEGIN(AudioInputHostMsg_CreateStream_Config)
  29   IPC_STRUCT_MEMBER(media::AudioParameters, params)
  30   IPC_STRUCT_MEMBER(bool, automatic_gain_control)
  31   IPC_STRUCT_MEMBER(uint32, shared_memory_count)
  32 IPC_STRUCT_END()
  33
  34 // Messages sent from the browser to the renderer.
  35
  36 // Tell the renderer process that an audio stream has been created.
  37 // The renderer process is given a shared memory handle for the audio data
  38 // buffer it shares with the browser process. It is also given a SyncSocket that
  39 // it uses to communicate with the browser process about the state of the
  40 // buffered audio data.
  41 IPC_MESSAGE_CONTROL4(
  42    AudioMsg_NotifyStreamCreated,
  43    int /* stream id */,
  44    base::SharedMemoryHandle /* handle */,
  45    base::SyncSocket::TransitDescriptor /* socket descriptor */,
  46    uint32 /* length */)
  47
  48 // Tell the renderer process that an audio input stream has been created.
  49 // The renderer process would be given a SyncSocket that it should read
  50 // from from then on. It is also given number of segments in shared memory.
  51 IPC_MESSAGE_CONTROL5(
  52    AudioInputMsg_NotifyStreamCreated,
  53    int /* stream id */,
  54    base::SharedMemoryHandle /* handle */,
  55    base::SyncSocket::TransitDescriptor /* socket descriptor */,
  56    uint32 /* length */,
  57    uint32 /* segment count */)
  58
  59 // Notification message sent from AudioRendererHost to renderer after an output
  60 // device change has occurred.
  61 IPC_MESSAGE_CONTROL3(AudioMsg_NotifyDeviceChanged,
  62                      int /* stream_id */,
  63                      int /* new_buffer_size */,
  64                      int /* new_sample_rate */)
  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 // Messages sent from the renderer to the browser.
  82
  83 // Request that is sent to the browser for creating an audio output stream.
  84 // |render_view_id| is the routing ID for the render view producing the audio
  85 // data.
  86 IPC_MESSAGE_CONTROL5(AudioHostMsg_CreateStream,
  87                      int /* stream_id */,
  88                      int /* render_view_id */,
  89                      int /* render_frame_id */,
  90                      int /* session_id */,
  91                      media::AudioParameters /* params */)
  92
  93 // Request that is sent to the browser for creating an audio input stream.
  94 // |render_view_id| is the routing ID for the render view consuming the audio
  95 // data.
  96 IPC_MESSAGE_CONTROL4(AudioInputHostMsg_CreateStream,
  97                      int /* stream_id */,
  98                      int /* render_view_id */,
  99                      int /* session_id */,
 100                      AudioInputHostMsg_CreateStream_Config)
 101
 102 // Start buffering and play the audio stream specified by stream_id.
 103 IPC_MESSAGE_CONTROL1(AudioHostMsg_PlayStream,
 104                      int /* stream_id */)
 105
 106 // Start recording the audio input stream specified by stream_id.
 107 IPC_MESSAGE_CONTROL1(AudioInputHostMsg_RecordStream,
 108                      int /* stream_id */)
 109
 110 // Pause the audio stream specified by stream_id.
 111 IPC_MESSAGE_CONTROL1(AudioHostMsg_PauseStream,
 112                      int /* stream_id */)
 113
 114 // Close an audio stream specified by stream_id.
 115 IPC_MESSAGE_CONTROL1(AudioHostMsg_CloseStream,
 116                      int /* stream_id */)
 117
 118 // Close an audio input stream specified by stream_id.
 119 IPC_MESSAGE_CONTROL1(AudioInputHostMsg_CloseStream,
 120                      int /* stream_id */)
 121
 122 // Set audio volume of the stream specified by stream_id.
 123 // TODO(hclam): change this to vector if we have channel numbers other than 2.
 124 IPC_MESSAGE_CONTROL2(AudioHostMsg_SetVolume,
 125                      int /* stream_id */,
 126                      double /* volume */)
 127
 128 // Set audio volume of the input stream specified by stream_id.
 129 IPC_MESSAGE_CONTROL2(AudioInputHostMsg_SetVolume,
 130                      int /* stream_id */,
 131                      double /* volume */)