SoftG711.h revision bbba88cb1bdc34705d1477208990a06904c022e7 
1/*
2 * Copyright (C) 2011 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 SOFT_G711_H_
18
19#define SOFT_G711_H_
20
21#include "SimpleSoftOMXComponent.h"
22
23namespace android {
24
25struct SoftG711 : public SimpleSoftOMXComponent {
26    SoftG711(const char *name,
27            const OMX_CALLBACKTYPE *callbacks,
28            OMX_PTR appData,
29            OMX_COMPONENTTYPE **component);
30
31protected:
32    virtual ~SoftG711();
33
34    virtual OMX_ERRORTYPE internalGetParameter(
35            OMX_INDEXTYPE index, OMX_PTR params);
36
37    virtual OMX_ERRORTYPE internalSetParameter(
38            OMX_INDEXTYPE index, const OMX_PTR params);
39
40    virtual void onQueueFilled(OMX_U32 portIndex);
41
42private:
43    enum {
44        kNumBuffers = 4,
45        kMaxNumSamplesPerFrame = 16384,
46    };
47
48    bool mIsMLaw;
49    OMX_U32 mNumChannels;
50    bool mSignalledError;
51
52    void initPorts();
53
54    static void DecodeALaw(int16_t *out, const uint8_t *in, size_t inSize);
55    static void DecodeMLaw(int16_t *out, const uint8_t *in, size_t inSize);
56
57    DISALLOW_EVIL_CONSTRUCTORS(SoftG711);
58};
59
60}  // namespace android
61
62#endif  // SOFT_G711_H_
63
64