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      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 SOFT_G711_H_
     18 
     19 #define SOFT_G711_H_
     20 
     21 #include "SimpleSoftOMXComponent.h"
     22 
     23 namespace android {
     24 
     25 struct SoftG711 : public SimpleSoftOMXComponent {
     26     SoftG711(const char *name,
     27             const OMX_CALLBACKTYPE *callbacks,
     28             OMX_PTR appData,
     29             OMX_COMPONENTTYPE **component);
     30 
     31 protected:
     32     virtual ~SoftG711();
     33 
     34     virtual OMX_ERRORTYPE internalGetParameter(
     35             OMX_INDEXTYPE index, OMX_PTR params);
     36 
     37     virtual OMX_ERRORTYPE internalSetParameter(
     38             OMX_INDEXTYPE index, const OMX_PTR params);
     39 
     40     virtual void onQueueFilled(OMX_U32 portIndex);
     41 
     42 private:
     43     enum {
     44         kNumBuffers = 4,
     45         kMaxNumSamplesPerFrame = 16384,
     46     };
     47 
     48     bool mIsMLaw;
     49     OMX_U32 mNumChannels;
     50     bool mSignalledError;
     51 
     52     void initPorts();
     53 
     54     static void DecodeALaw(int16_t *out, const uint8_t *in, size_t inSize);
     55     static void DecodeMLaw(int16_t *out, const uint8_t *in, size_t inSize);
     56 
     57     DISALLOW_EVIL_CONSTRUCTORS(SoftG711);
     58 };
     59 
     60 }  // namespace android
     61 
     62 #endif  // SOFT_G711_H_
     63 
     64