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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "content/browser/renderer_host/media/audio_sync_reader.h" | 5 #include "content/browser/renderer_host/media/audio_sync_reader.h" |
| 6 | 6 |
| 7 #include <algorithm> | 7 #include <algorithm> |
| 8 | 8 |
| 9 #include "base/metrics/histogram.h" | 9 #include "base/metrics/histogram.h" |
| 10 #include "base/process_util.h" | 10 #include "base/process_util.h" |
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| 56 } | 56 } |
| 57 | 57 |
| 58 // media::AudioOutputController::SyncReader implementations. | 58 // media::AudioOutputController::SyncReader implementations. |
| 59 void AudioSyncReader::UpdatePendingBytes(uint32 bytes) { | 59 void AudioSyncReader::UpdatePendingBytes(uint32 bytes) { |
| 60 if (bytes != static_cast<uint32>(media::kPauseMark)) { | 60 if (bytes != static_cast<uint32>(media::kPauseMark)) { |
| 61 // Store unknown length of data into buffer, so we later | 61 // Store unknown length of data into buffer, so we later |
| 62 // can find out if data became available. | 62 // can find out if data became available. |
| 63 media::SetUnknownDataSize(shared_memory_, packet_size_); | 63 media::SetUnknownDataSize(shared_memory_, packet_size_); |
| 64 } | 64 } |
| 65 | 65 |
| 66 if (socket_.get()) { | 66 if (socket_) { |
| 67 socket_->Send(&bytes, sizeof(bytes)); | 67 socket_->Send(&bytes, sizeof(bytes)); |
| 68 } | 68 } |
| 69 } | 69 } |
| 70 | 70 |
| 71 int AudioSyncReader::Read(AudioBus* source, AudioBus* dest) { | 71 int AudioSyncReader::Read(AudioBus* source, AudioBus* dest) { |
| 72 ++renderer_callback_count_; | 72 ++renderer_callback_count_; |
| 73 if (!DataReady()) | 73 if (!DataReady()) |
| 74 ++renderer_missed_callback_count_; | 74 ++renderer_missed_callback_count_; |
| 75 | 75 |
| 76 // Copy optional synchronized live audio input for consumption by renderer | 76 // Copy optional synchronized live audio input for consumption by renderer |
| 77 // process. | 77 // process. |
| 78 if (source && input_bus_.get()) { | 78 if (source && input_bus_) { |
| 79 DCHECK_EQ(source->channels(), input_bus_->channels()); | 79 DCHECK_EQ(source->channels(), input_bus_->channels()); |
| 80 DCHECK_LE(source->frames(), input_bus_->frames()); | 80 DCHECK_LE(source->frames(), input_bus_->frames()); |
| 81 source->CopyTo(input_bus_.get()); | 81 source->CopyTo(input_bus_.get()); |
| 82 } | 82 } |
| 83 | 83 |
| 84 // Retrieve the actual number of bytes available from the shared memory. If | 84 // Retrieve the actual number of bytes available from the shared memory. If |
| 85 // the renderer has not completed rendering this value will be invalid (still | 85 // the renderer has not completed rendering this value will be invalid (still |
| 86 // the marker stored in UpdatePendingBytes() above) and must be sanitized. | 86 // the marker stored in UpdatePendingBytes() above) and must be sanitized. |
| 87 // TODO(dalecurtis): Technically this is not the exact size. Due to channel | 87 // TODO(dalecurtis): Technically this is not the exact size. Due to channel |
| 88 // padding for alignment, there may be more data available than this; AudioBus | 88 // padding for alignment, there may be more data available than this; AudioBus |
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| 112 | 112 |
| 113 // Store unknown length of data into buffer, in case renderer does not store | 113 // Store unknown length of data into buffer, in case renderer does not store |
| 114 // the length itself. It also helps in decision if we need to yield. | 114 // the length itself. It also helps in decision if we need to yield. |
| 115 media::SetUnknownDataSize(shared_memory_, packet_size_); | 115 media::SetUnknownDataSize(shared_memory_, packet_size_); |
| 116 | 116 |
| 117 // Return the actual number of frames read. | 117 // Return the actual number of frames read. |
| 118 return frames; | 118 return frames; |
| 119 } | 119 } |
| 120 | 120 |
| 121 void AudioSyncReader::Close() { | 121 void AudioSyncReader::Close() { |
| 122 if (socket_.get()) { | 122 if (socket_) { |
| 123 socket_->Close(); | 123 socket_->Close(); |
| 124 } | 124 } |
| 125 } | 125 } |
| 126 | 126 |
| 127 bool AudioSyncReader::Init() { | 127 bool AudioSyncReader::Init() { |
| 128 socket_.reset(new base::CancelableSyncSocket()); | 128 socket_.reset(new base::CancelableSyncSocket()); |
| 129 foreign_socket_.reset(new base::CancelableSyncSocket()); | 129 foreign_socket_.reset(new base::CancelableSyncSocket()); |
| 130 return base::CancelableSyncSocket::CreatePair(socket_.get(), | 130 return base::CancelableSyncSocket::CreatePair(socket_.get(), |
| 131 foreign_socket_.get()); | 131 foreign_socket_.get()); |
| 132 } | 132 } |
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| 148 base::FileDescriptor* foreign_handle) { | 148 base::FileDescriptor* foreign_handle) { |
| 149 foreign_handle->fd = foreign_socket_->handle(); | 149 foreign_handle->fd = foreign_socket_->handle(); |
| 150 foreign_handle->auto_close = false; | 150 foreign_handle->auto_close = false; |
| 151 if (foreign_handle->fd != -1) | 151 if (foreign_handle->fd != -1) |
| 152 return true; | 152 return true; |
| 153 return false; | 153 return false; |
| 154 } | 154 } |
| 155 #endif | 155 #endif |
| 156 | 156 |
| 157 } // namespace content | 157 } // namespace content |
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