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
26namespace android {
27
28struct ABuffer;
29struct PersistentSurface;
30
31struct 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
84protected:
85    CodecBase();
86    virtual ~CodecBase();
87
88private:
89    DISALLOW_EVIL_CONSTRUCTORS(CodecBase);
90};
91
92}  // namespace android
93
94#endif  // CODEC_BASE_H_
95
96