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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 struct PersistentSurface;
     30 
     31 struct CodecBase : public AHandler {
     32     enum {
     33         kWhatFillThisBuffer      = 'fill',
     34         kWhatDrainThisBuffer     = 'drai',
     35         kWhatEOS                 = 'eos ',
     36         kWhatShutdownCompleted   = 'scom',
     37         kWhatFlushCompleted      = 'fcom',
     38         kWhatOutputFormatChanged = 'outC',
     39         kWhatError               = 'erro',
     40         kWhatComponentAllocated  = 'cAll',
     41         kWhatComponentConfigured = 'cCon',
     42         kWhatInputSurfaceCreated = 'isfc',
     43         kWhatInputSurfaceAccepted = 'isfa',
     44         kWhatSignaledInputEOS    = 'seos',
     45         kWhatBuffersAllocated    = 'allc',
     46         kWhatOutputFramesRendered = 'outR',
     47     };
     48 
     49     virtual void setNotificationMessage(const sp<AMessage> &msg) = 0;
     50 
     51     virtual void initiateAllocateComponent(const sp<AMessage> &msg) = 0;
     52     virtual void initiateConfigureComponent(const sp<AMessage> &msg) = 0;
     53     virtual void initiateCreateInputSurface() = 0;
     54     virtual void initiateSetInputSurface(
     55             const sp<PersistentSurface> &surface) = 0;
     56     virtual void initiateStart() = 0;
     57     virtual void initiateShutdown(bool keepComponentAllocated = false) = 0;
     58 
     59     // require an explicit message handler
     60     virtual void onMessageReceived(const sp<AMessage> &msg) = 0;
     61 
     62     virtual status_t setSurface(const sp<Surface> &surface) { return INVALID_OPERATION; }
     63 
     64     virtual void signalFlush() = 0;
     65     virtual void signalResume() = 0;
     66 
     67     virtual void signalRequestIDRFrame() = 0;
     68     virtual void signalSetParameters(const sp<AMessage> &msg) = 0;
     69     virtual void signalEndOfInputStream() = 0;
     70 
     71     struct PortDescription : public RefBase {
     72         virtual size_t countBuffers() = 0;
     73         virtual IOMX::buffer_id bufferIDAt(size_t index) const = 0;
     74         virtual sp<ABuffer> bufferAt(size_t index) const = 0;
     75 
     76     protected:
     77         PortDescription();
     78         virtual ~PortDescription();
     79 
     80     private:
     81         DISALLOW_EVIL_CONSTRUCTORS(PortDescription);
     82     };
     83 
     84 protected:
     85     CodecBase();
     86     virtual ~CodecBase();
     87 
     88 private:
     89     DISALLOW_EVIL_CONSTRUCTORS(CodecBase);
     90 };
     91 
     92 }  // namespace android
     93 
     94 #endif  // CODEC_BASE_H_
     95 
     96