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      1 /*
      2  * Copyright (C) 2014 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 /*
     18  * The Opus specification is part of IETF RFC 6716:
     19  * http://tools.ietf.org/html/rfc6716
     20  */
     21 
     22 #ifndef SOFT_OPUS_H_
     23 
     24 #define SOFT_OPUS_H_
     25 
     26 #include <media/stagefright/omx/SimpleSoftOMXComponent.h>
     27 
     28 struct OpusMSDecoder;
     29 
     30 namespace android {
     31 
     32 struct OpusHeader {
     33   int channels;
     34   int skip_samples;
     35   int channel_mapping;
     36   int num_streams;
     37   int num_coupled;
     38   int16_t gain_db;
     39   uint8_t stream_map[8];
     40 };
     41 
     42 struct SoftOpus : public SimpleSoftOMXComponent {
     43     SoftOpus(const char *name,
     44              const OMX_CALLBACKTYPE *callbacks,
     45              OMX_PTR appData,
     46              OMX_COMPONENTTYPE **component);
     47 
     48 protected:
     49     virtual ~SoftOpus();
     50 
     51     virtual OMX_ERRORTYPE internalGetParameter(
     52             OMX_INDEXTYPE index, OMX_PTR params);
     53 
     54     virtual OMX_ERRORTYPE internalSetParameter(
     55             OMX_INDEXTYPE index, const OMX_PTR params);
     56 
     57     virtual void onQueueFilled(OMX_U32 portIndex);
     58     virtual void onPortFlushCompleted(OMX_U32 portIndex);
     59     virtual void onPortEnableCompleted(OMX_U32 portIndex, bool enabled);
     60     virtual void onReset();
     61 
     62 private:
     63     enum {
     64         kNumBuffers = 4,
     65         kMaxNumSamplesPerBuffer = 960 * 6
     66     };
     67 
     68     size_t mInputBufferCount;
     69 
     70     OpusMSDecoder *mDecoder;
     71     OpusHeader *mHeader;
     72 
     73     int64_t mCodecDelay;
     74     int64_t mSeekPreRoll;
     75     int64_t mSamplesToDiscard;
     76     int64_t mAnchorTimeUs;
     77     int64_t mNumFramesOutput;
     78     bool mHaveEOS;
     79 
     80     enum {
     81         NONE,
     82         AWAITING_DISABLED,
     83         AWAITING_ENABLED
     84     } mOutputPortSettingsChange;
     85 
     86     void initPorts();
     87     status_t initDecoder();
     88     bool isConfigured() const;
     89     void handleEOS();
     90 
     91     DISALLOW_EVIL_CONSTRUCTORS(SoftOpus);
     92 };
     93 
     94 }  // namespace android
     95 
     96 #endif  // SOFT_OPUS_H_
     97