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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_MP3_H_
     18 
     19 #define SOFT_MP3_H_
     20 
     21 #include <media/stagefright/omx/SimpleSoftOMXComponent.h>
     22 
     23 struct tPVMP3DecoderExternal;
     24 
     25 namespace android {
     26 
     27 struct SoftMP3 : public SimpleSoftOMXComponent {
     28     SoftMP3(const char *name,
     29             const OMX_CALLBACKTYPE *callbacks,
     30             OMX_PTR appData,
     31             OMX_COMPONENTTYPE **component);
     32 
     33 protected:
     34     virtual ~SoftMP3();
     35 
     36     virtual OMX_ERRORTYPE internalGetParameter(
     37             OMX_INDEXTYPE index, OMX_PTR params);
     38 
     39     virtual OMX_ERRORTYPE internalSetParameter(
     40             OMX_INDEXTYPE index, const OMX_PTR params);
     41 
     42     virtual void onQueueFilled(OMX_U32 portIndex);
     43     virtual void onPortFlushCompleted(OMX_U32 portIndex);
     44     virtual void onPortEnableCompleted(OMX_U32 portIndex, bool enabled);
     45     virtual void onReset();
     46 
     47 private:
     48     enum {
     49         kNumBuffers = 4,
     50         kOutputBufferSize = 4608 * 2,
     51         kPVMP3DecoderDelay = 529 // frames
     52     };
     53 
     54     tPVMP3DecoderExternal *mConfig;
     55     void *mDecoderBuf;
     56     int64_t mAnchorTimeUs;
     57     int64_t mNumFramesOutput;
     58 
     59     int32_t mNumChannels;
     60     int32_t mSamplingRate;
     61 
     62     bool mIsFirst;
     63     bool mSignalledError;
     64     bool mSawInputEos;
     65     bool mSignalledOutputEos;
     66 
     67     enum {
     68         NONE,
     69         AWAITING_DISABLED,
     70         AWAITING_ENABLED
     71     } mOutputPortSettingsChange;
     72 
     73     void initPorts();
     74     void initDecoder();
     75     void *memsetSafe(OMX_BUFFERHEADERTYPE *outHeader, int c, size_t len);
     76 
     77     DISALLOW_EVIL_CONSTRUCTORS(SoftMP3);
     78 };
     79 
     80 }  // namespace android
     81 
     82 #endif  // SOFT_MP3_H_
     83 
     84 
     85