1 /* 2 * Copyright (C) 2010 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 G711_DECODER_H_ 18 19 #define G711_DECODER_H_ 20 21 #include <media/stagefright/MediaSource.h> 22 23 namespace android { 24 25 struct MediaBufferGroup; 26 27 struct G711Decoder : public MediaSource { 28 G711Decoder(const sp<MediaSource> &source); 29 30 virtual status_t start(MetaData *params); 31 virtual status_t stop(); 32 33 virtual sp<MetaData> getFormat(); 34 35 virtual status_t read( 36 MediaBuffer **buffer, const ReadOptions *options); 37 38 protected: 39 virtual ~G711Decoder(); 40 41 private: 42 sp<MediaSource> mSource; 43 bool mStarted; 44 bool mIsMLaw; 45 46 MediaBufferGroup *mBufferGroup; 47 48 static void DecodeALaw(int16_t *out, const uint8_t *in, size_t inSize); 49 static void DecodeMLaw(int16_t *out, const uint8_t *in, size_t inSize); 50 51 G711Decoder(const G711Decoder &); 52 G711Decoder &operator=(const G711Decoder &); 53 }; 54 55 } // namespace android 56 57 #endif // G711_DECODER_H_ 58
