1 /* 2 ** 3 ** Copyright 2012, The Android Open Source Project 4 ** 5 ** Licensed under the Apache License, Version 2.0 (the "License"); 6 ** you may not use this file except in compliance with the License. 7 ** You may obtain a copy of the License at 8 ** 9 ** http://www.apache.org/licenses/LICENSE-2.0 10 ** 11 ** Unless required by applicable law or agreed to in writing, software 12 ** distributed under the License is distributed on an "AS IS" BASIS, 13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 ** See the License for the specific language governing permissions and 15 ** limitations under the License. 16 */ 17 18 #ifndef INCLUDING_FROM_AUDIOFLINGER_H 19 #error This header file should only be included from AudioFlinger.h 20 #endif 21 22 // record track 23 class RecordTrack : public TrackBase { 24 public: 25 RecordTrack(RecordThread *thread, 26 const sp<Client>& client, 27 uint32_t sampleRate, 28 audio_format_t format, 29 audio_channel_mask_t channelMask, 30 size_t frameCount, 31 void *buffer, 32 int sessionId, 33 int uid, 34 IAudioFlinger::track_flags_t flags, 35 track_type type); 36 virtual ~RecordTrack(); 37 virtual status_t initCheck() const; 38 39 virtual status_t start(AudioSystem::sync_event_t event, int triggerSession); 40 virtual void stop(); 41 42 void destroy(); 43 44 void invalidate(); 45 // clear the buffer overflow flag 46 void clearOverflow() { mOverflow = false; } 47 // set the buffer overflow flag and return previous value 48 bool setOverflow() { bool tmp = mOverflow; mOverflow = true; 49 return tmp; } 50 51 static void appendDumpHeader(String8& result); 52 void dump(char* buffer, size_t size, bool active); 53 54 void handleSyncStartEvent(const sp<SyncEvent>& event); 55 void clearSyncStartEvent(); 56 57 private: 58 friend class AudioFlinger; // for mState 59 60 RecordTrack(const RecordTrack&); 61 RecordTrack& operator = (const RecordTrack&); 62 63 // AudioBufferProvider interface 64 virtual status_t getNextBuffer(AudioBufferProvider::Buffer* buffer, 65 int64_t pts = kInvalidPTS); 66 // releaseBuffer() not overridden 67 68 bool mOverflow; // overflow on most recent attempt to fill client buffer 69 70 AudioBufferProvider::Buffer mSink; // references client's buffer sink in shared memory 71 72 // sync event triggering actual audio capture. Frames read before this event will 73 // be dropped and therefore not read by the application. 74 sp<SyncEvent> mSyncStartEvent; 75 76 // number of captured frames to drop after the start sync event has been received. 77 // when < 0, maximum frames to drop before starting capture even if sync event is 78 // not received 79 ssize_t mFramesToDrop; 80 81 // used by resampler to find source frames 82 ResamplerBufferProvider *mResamplerBufferProvider; 83 84 // used by the record thread to convert frames to proper destination format 85 RecordBufferConverter *mRecordBufferConverter; 86 }; 87 88 // playback track, used by PatchPanel 89 class PatchRecord : virtual public RecordTrack, public PatchProxyBufferProvider { 90 public: 91 92 PatchRecord(RecordThread *recordThread, 93 uint32_t sampleRate, 94 audio_channel_mask_t channelMask, 95 audio_format_t format, 96 size_t frameCount, 97 void *buffer, 98 IAudioFlinger::track_flags_t flags); 99 virtual ~PatchRecord(); 100 101 // AudioBufferProvider interface 102 virtual status_t getNextBuffer(AudioBufferProvider::Buffer* buffer, 103 int64_t pts); 104 virtual void releaseBuffer(AudioBufferProvider::Buffer* buffer); 105 106 // PatchProxyBufferProvider interface 107 virtual status_t obtainBuffer(Proxy::Buffer *buffer, 108 const struct timespec *timeOut = NULL); 109 virtual void releaseBuffer(Proxy::Buffer *buffer); 110 111 void setPeerProxy(PatchProxyBufferProvider *proxy) { mPeerProxy = proxy; } 112 113 private: 114 sp<ClientProxy> mProxy; 115 PatchProxyBufferProvider* mPeerProxy; 116 struct timespec mPeerTimeout; 117 }; // end of PatchRecord 118
