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_MAX_VALUE(media::AudioInputIPCDelegate::State, 24 media::AudioInputIPCDelegate::kStateLast) 25 26 IPC_ENUM_TRAITS_MAX_VALUE(media::AudioOutputIPCDelegate::State, 27 media::AudioOutputIPCDelegate::kStateLast) 28 29 IPC_STRUCT_BEGIN(AudioInputHostMsg_CreateStream_Config) 30 IPC_STRUCT_MEMBER(media::AudioParameters, params) 31 IPC_STRUCT_MEMBER(bool, automatic_gain_control) 32 IPC_STRUCT_MEMBER(uint32, shared_memory_count) 33 IPC_STRUCT_END() 34 35 // Messages sent from the browser to the renderer. 36 37 // Tell the renderer process that an audio stream has been created. 38 // The renderer process is given a shared memory handle for the audio data 39 // buffer it shares with the browser process. It is also given a SyncSocket that 40 // it uses to communicate with the browser process about the state of the 41 // buffered audio data. 42 #if defined(OS_WIN) 43 IPC_MESSAGE_CONTROL4(AudioMsg_NotifyStreamCreated, 44 int /* stream id */, 45 base::SharedMemoryHandle /* handle */, 46 base::SyncSocket::Handle /* socket handle */, 47 uint32 /* length */) 48 #else 49 IPC_MESSAGE_CONTROL4(AudioMsg_NotifyStreamCreated, 50 int /* stream id */, 51 base::SharedMemoryHandle /* handle */, 52 base::FileDescriptor /* socket handle */, 53 uint32 /* length */) 54 #endif 55 56 // Tell the renderer process that an audio input stream has been created. 57 // The renderer process would be given a SyncSocket that it should read 58 // from from then on. It is also given number of segments in shared memory. 59 #if defined(OS_WIN) 60 IPC_MESSAGE_CONTROL5(AudioInputMsg_NotifyStreamCreated, 61 int /* stream id */, 62 base::SharedMemoryHandle /* handle */, 63 base::SyncSocket::Handle /* socket handle */, 64 uint32 /* length */, 65 uint32 /* segment count */) 66 #else 67 IPC_MESSAGE_CONTROL5(AudioInputMsg_NotifyStreamCreated, 68 int /* stream id */, 69 base::SharedMemoryHandle /* handle */, 70 base::FileDescriptor /* socket handle */, 71 uint32 /* length */, 72 uint32 /* segment count */) 73 #endif 74 75 // Notification message sent from AudioRendererHost to renderer after an output 76 // device change has occurred. 77 IPC_MESSAGE_CONTROL3(AudioMsg_NotifyDeviceChanged, 78 int /* stream_id */, 79 int /* new_buffer_size */, 80 int /* new_sample_rate */) 81 82 // Notification message sent from AudioRendererHost to renderer for state 83 // update after the renderer has requested a Create/Start/Close. 84 IPC_MESSAGE_CONTROL2(AudioMsg_NotifyStreamStateChanged, 85 int /* stream id */, 86 media::AudioOutputIPCDelegate::State /* new state */) 87 88 // Notification message sent from browser to renderer for state update. 89 IPC_MESSAGE_CONTROL2(AudioInputMsg_NotifyStreamStateChanged, 90 int /* stream id */, 91 media::AudioInputIPCDelegate::State /* new state */) 92 93 IPC_MESSAGE_CONTROL2(AudioInputMsg_NotifyStreamVolume, 94 int /* stream id */, 95 double /* volume */) 96 97 // Messages sent from the renderer to the browser. 98 99 // Request that is sent to the browser for creating an audio output stream. 100 // |render_view_id| is the routing ID for the render view producing the audio 101 // data. 102 IPC_MESSAGE_CONTROL5(AudioHostMsg_CreateStream, 103 int /* stream_id */, 104 int /* render_view_id */, 105 int /* render_frame_id */, 106 int /* session_id */, 107 media::AudioParameters /* params */) 108 109 // Request that is sent to the browser for creating an audio input stream. 110 // |render_view_id| is the routing ID for the render view consuming the audio 111 // data. 112 IPC_MESSAGE_CONTROL4(AudioInputHostMsg_CreateStream, 113 int /* stream_id */, 114 int /* render_view_id */, 115 int /* session_id */, 116 AudioInputHostMsg_CreateStream_Config) 117 118 // Start buffering and play the audio stream specified by stream_id. 119 IPC_MESSAGE_CONTROL1(AudioHostMsg_PlayStream, 120 int /* stream_id */) 121 122 // Start recording the audio input stream specified by stream_id. 123 IPC_MESSAGE_CONTROL1(AudioInputHostMsg_RecordStream, 124 int /* stream_id */) 125 126 // Pause the audio stream specified by stream_id. 127 IPC_MESSAGE_CONTROL1(AudioHostMsg_PauseStream, 128 int /* stream_id */) 129 130 // Close an audio stream specified by stream_id. 131 IPC_MESSAGE_CONTROL1(AudioHostMsg_CloseStream, 132 int /* stream_id */) 133 134 // Close an audio input stream specified by stream_id. 135 IPC_MESSAGE_CONTROL1(AudioInputHostMsg_CloseStream, 136 int /* stream_id */) 137 138 // Set audio volume of the stream specified by stream_id. 139 // TODO(hclam): change this to vector if we have channel numbers other than 2. 140 IPC_MESSAGE_CONTROL2(AudioHostMsg_SetVolume, 141 int /* stream_id */, 142 double /* volume */) 143 144 // Set audio volume of the input stream specified by stream_id. 145 IPC_MESSAGE_CONTROL2(AudioInputHostMsg_SetVolume, 146 int /* stream_id */, 147 double /* volume */) 148
