1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef AUDIO_SF_DECODER_H_ 18 #define AUDIO_SF_DECODER_H_ 19 20 #include <media/stagefright/DataSource.h> 21 #include <media/stagefright/MediaSource.h> 22 #include <media/stagefright/FileSource.h> 23 #include <media/stagefright/MediaDefs.h> 24 #include <media/stagefright/MediaExtractor.h> 25 #include <media/stagefright/MetaData.h> 26 #include <media/stagefright/OMXClient.h> 27 #include <media/stagefright/OMXCodec.h> 28 #include "NuCachedSource2.h" 29 #include "ThrottledSource.h" 30 31 #include "android_GenericPlayer.h" 32 33 //-------------------------------------------------------------------------------------------------- 34 namespace android { 35 36 // keep in sync with the entries of kPcmDecodeMetadataKeys[] 37 #define ANDROID_KEY_INDEX_PCMFORMAT_NUMCHANNELS 0 38 #define ANDROID_KEY_INDEX_PCMFORMAT_SAMPLERATE 1 39 #define ANDROID_KEY_INDEX_PCMFORMAT_BITSPERSAMPLE 2 40 #define ANDROID_KEY_INDEX_PCMFORMAT_CONTAINERSIZE 3 41 #define ANDROID_KEY_INDEX_PCMFORMAT_CHANNELMASK 4 42 #define ANDROID_KEY_INDEX_PCMFORMAT_ENDIANNESS 5 43 44 // to keep in sync with the ANDROID_KEY_INDEX_PCMFORMAT_* constants in android_AudioSfDecoder.cpp 45 static const char* const kPcmDecodeMetadataKeys[] = { 46 ANDROID_KEY_PCMFORMAT_NUMCHANNELS, ANDROID_KEY_PCMFORMAT_SAMPLERATE, 47 ANDROID_KEY_PCMFORMAT_BITSPERSAMPLE, ANDROID_KEY_PCMFORMAT_CONTAINERSIZE, 48 ANDROID_KEY_PCMFORMAT_CHANNELMASK, ANDROID_KEY_PCMFORMAT_ENDIANNESS }; 49 #define NB_PCMMETADATA_KEYS (sizeof(kPcmDecodeMetadataKeys)/sizeof(kPcmDecodeMetadataKeys[0])) 50 51 // abstract base class for AudioToCbRenderer and it's subclasses 52 class AudioSfDecoder : public GenericPlayer 53 { 54 public: 55 56 AudioSfDecoder(const AudioPlayback_Parameters* params); 57 virtual ~AudioSfDecoder(); 58 59 virtual void preDestroy(); 60 61 // overridden from GenericPlayer 62 virtual void play(); 63 virtual void getPositionMsec(int* msec); //msec != NULL, ANDROID_UNKNOWN_TIME if unknown 64 65 uint32_t getPcmFormatKeyCount() const; 66 bool getPcmFormatKeySize(uint32_t index, uint32_t* pKeySize); 67 bool getPcmFormatKeyName(uint32_t index, uint32_t keySize, char* keyName); 68 bool getPcmFormatValueSize(uint32_t index, uint32_t* pValueSize); 69 bool getPcmFormatKeyValue(uint32_t index, uint32_t size, uint32_t* pValue); 70 71 protected: 72 73 enum { 74 kWhatDecode = 'deco', 75 kWhatRender = 'rend', 76 kWhatCheckCache = 'cach' 77 }; 78 79 // Async event handlers (called from the AudioSfDecoder's event loop) 80 void onDecode(); 81 void onCheckCache(const sp<AMessage> &msg); 82 virtual void onRender() = 0; 83 84 // Async event handlers (called from GenericPlayer's event loop) 85 virtual void onPrepare(); 86 virtual void onPlay(); 87 virtual void onPause(); 88 virtual void onSeek(const sp<AMessage> &msg); 89 virtual void onLoop(const sp<AMessage> &msg); 90 91 // overridden from GenericPlayer 92 virtual void onNotify(const sp<AMessage> &msg); 93 virtual void onMessageReceived(const sp<AMessage> &msg); 94 95 // to be implemented by subclasses of AudioSfDecoder to do something with the audio samples 96 // (called from GenericPlayer's event loop) 97 virtual void createAudioSink() = 0; 98 virtual void updateAudioSink() = 0; // called with mBufferSourceLock held 99 virtual void startAudioSink() = 0; 100 virtual void pauseAudioSink() = 0; 101 102 sp<DataSource> mDataSource; // where the raw data comes from 103 sp<MediaSource> mAudioSource;// the decoder reading from the data source 104 // used to indicate mAudioSource was successfully started, but wasn't stopped 105 bool mAudioSourceStarted; 106 107 // negative values indicate invalid value 108 int64_t mBitrate; // in bits/sec 109 int64_t mDurationUsec; // ANDROID_UNKNOWN_TIME if unknown 110 111 // buffer passed from decoder to renderer 112 MediaBuffer *mDecodeBuffer; 113 114 // mutex used to protect the decode buffer, the audio source and its running state 115 Mutex mBufferSourceLock; 116 117 void notifyPrepared(status_t prepareRes); 118 119 int64_t mSeekTimeMsec; 120 int64_t mLastDecodedPositionUs; // ANDROID_UNKNOWN_TIME if unknown 121 // mutex used for seek flag, seek time (mSeekTimeMsec), 122 // and last decoded position (mLastDecodedPositionUs) 123 Mutex mTimeLock; 124 125 // informations that can be retrieved in the PCM format queries 126 // these values are only written in the event loop 127 uint32_t mPcmFormatValues[NB_PCMMETADATA_KEYS]; 128 // protects mPcmFormatValues 129 Mutex mPcmFormatLock; 130 advancesPositionInRealTime()131 virtual bool advancesPositionInRealTime() const { return false; } 132 133 private: 134 bool wantPrefetch(); 135 CacheStatus_t getCacheRemaining(bool *eos); 136 int64_t getPositionUsec(); // ANDROID_UNKNOWN_TIME if unknown 137 138 // convenience function to update internal state when decoding parameters have changed, 139 // called with a lock on mBufferSourceLock 140 void hasNewDecodeParams(); 141 142 static bool isSupportedCodec(const char* mime); 143 144 private: 145 DISALLOW_EVIL_CONSTRUCTORS(AudioSfDecoder); 146 147 }; 148 149 } // namespace android 150 151 #endif // AUDIO_SF_DECODER_H_ 152