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;
29
30struct 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
77protected:
78    CodecBase();
79    virtual ~CodecBase();
80
81private:
82    DISALLOW_EVIL_CONSTRUCTORS(CodecBase);
83};
84
85}  // namespace android
86
87#endif  // CODEC_BASE_H_
88
89