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 */) 144
