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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 #ifndef CODEC_BASE_H_
     18 
     19 #define CODEC_BASE_H_
     20 
     21 #include <stdint.h>
     22 #include <media/IOMX.h>
     23 
     24 #include <media/stagefright/foundation/AHandler.h>
     25 
     26 namespace android {
     27 
     28 struct ABuffer;
     29 
     30 struct CodecBase : public AHandler {
     31     enum {
     32         kWhatFillThisBuffer      = 'fill',
     33         kWhatDrainThisBuffer     = 'drai',
     34         kWhatEOS                 = 'eos ',
     35         kWhatShutdownCompleted   = 'scom',
     36         kWhatFlushCompleted      = 'fcom',
     37         kWhatOutputFormatChanged = 'outC',
     38         kWhatError               = 'erro',
     39         kWhatComponentAllocated  = 'cAll',
     40         kWhatComponentConfigured = 'cCon',
     41         kWhatInputSurfaceCreated = 'isfc',
     42         kWhatSignaledInputEOS    = 'seos',
     43         kWhatBuffersAllocated    = 'allc',
     44     };
     45 
     46     virtual void setNotificationMessage(const sp<AMessage> &msg) = 0;
     47 
     48     virtual void initiateAllocateComponent(const sp<AMessage> &msg) = 0;
     49     virtual void initiateConfigureComponent(const sp<AMessage> &msg) = 0;
     50     virtual void initiateCreateInputSurface() = 0;
     51     virtual void initiateStart() = 0;
     52     virtual void initiateShutdown(bool keepComponentAllocated = false) = 0;
     53 
     54     // require an explicit message handler
     55     virtual void onMessageReceived(const sp<AMessage> &msg) = 0;
     56 
     57     virtual void signalFlush() = 0;
     58     virtual void signalResume() = 0;
     59 
     60     virtual void signalRequestIDRFrame() = 0;
     61     virtual void signalSetParameters(const sp<AMessage> &msg) = 0;
     62     virtual void signalEndOfInputStream() = 0;
     63 
     64     struct PortDescription : public RefBase {
     65         virtual size_t countBuffers() = 0;
     66         virtual IOMX::buffer_id bufferIDAt(size_t index) const = 0;
     67         virtual sp<ABuffer> bufferAt(size_t index) const = 0;
     68 
     69     protected:
     70         PortDescription();
     71         virtual ~PortDescription();
     72 
     73     private:
     74         DISALLOW_EVIL_CONSTRUCTORS(PortDescription);
     75     };
     76 
     77 protected:
     78     CodecBase();
     79     virtual ~CodecBase();
     80 
     81 private:
     82     DISALLOW_EVIL_CONSTRUCTORS(CodecBase);
     83 };
     84 
     85 }  // namespace android
     86 
     87 #endif  // CODEC_BASE_H_
     88 
     89