1 /* 2 * Copyright (C) 2018 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 ANDROID_C2_SOFT_FLAC_ENC_H_ 18 #define ANDROID_C2_SOFT_FLAC_ENC_H_ 19 20 #include <SimpleC2Component.h> 21 #include <util/C2InterfaceHelper.h> 22 23 #include "FLAC/stream_encoder.h" 24 25 #define FLAC_COMPRESSION_LEVEL_MIN 0 26 #define FLAC_COMPRESSION_LEVEL_DEFAULT 5 27 #define FLAC_COMPRESSION_LEVEL_MAX 8 28 29 #define FLAC_HEADER_SIZE 128 30 31 #define MIN(a, b) (((a) < (b)) ? (a) : (b)) 32 33 namespace android { 34 35 class C2SoftFlacEnc : public SimpleC2Component { 36 public: 37 class IntfImpl; 38 39 C2SoftFlacEnc(const char *name, c2_node_id_t id, const std::shared_ptr<IntfImpl> &intfImpl); 40 C2SoftFlacEnc(const char *name, c2_node_id_t id, 41 const std::shared_ptr<C2ReflectorHelper> &helper); 42 virtual ~C2SoftFlacEnc(); 43 44 // From SimpleC2Component 45 c2_status_t onInit() override; 46 c2_status_t onStop() override; 47 void onReset() override; 48 void onRelease() override; 49 c2_status_t onFlush_sm() override; 50 void process( 51 const std::unique_ptr<C2Work> &work, 52 const std::shared_ptr<C2BlockPool> &pool) override; 53 c2_status_t drain( 54 uint32_t drainMode, 55 const std::shared_ptr<C2BlockPool> &pool) override; 56 57 private: 58 status_t configureEncoder(); 59 static FLAC__StreamEncoderWriteStatus flacEncoderWriteCallback( 60 const FLAC__StreamEncoder *encoder, const FLAC__byte buffer[], 61 size_t bytes, unsigned samples, unsigned current_frame, 62 void *client_data); 63 FLAC__StreamEncoderWriteStatus onEncodedFlacAvailable( 64 const FLAC__byte buffer[], size_t bytes, unsigned samples, 65 unsigned current_frame); 66 67 std::shared_ptr<IntfImpl> mIntf; 68 const unsigned int kInBlockSize = 1152; 69 static constexpr unsigned int kMaxNumChannels = 2; 70 static constexpr unsigned int kMaxBlockSize = 4608; 71 FLAC__StreamEncoder* mFlacStreamEncoder; 72 FLAC__int32* mInputBufferPcm32; 73 std::shared_ptr<C2LinearBlock> mOutputBlock; 74 bool mSignalledError; 75 bool mSignalledOutputEos; 76 uint32_t mBlockSize; 77 bool mIsFirstFrame; 78 int64_t mAnchorTimeStamp; 79 uint64_t mProcessedSamples; 80 // should the data received by the callback be written to the output port 81 bool mEncoderWriteData; 82 size_t mEncoderReturnedNbBytes; 83 unsigned mHeaderOffset; 84 bool mWroteHeader; 85 char mHeader[FLAC_HEADER_SIZE]; 86 struct OutputBuffer { 87 std::shared_ptr<C2Buffer> buffer; 88 c2_cntr64_t timestampUs; 89 std::uint64_t frameIndex; 90 }; 91 std::list<OutputBuffer> mOutputBuffers; 92 93 C2_DO_NOT_COPY(C2SoftFlacEnc); 94 }; 95 96 } // namespace android 97 98 #endif // ANDROID_C2_SOFT_FLAC_ENC_H_ 99