ESDS.h revision ad3af3305f024bcbbd55c894a4995e449498e1ba 
1/*
2 * Copyright (C) 2009 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 ESDS_H_
18
19#define ESDS_H_
20
21#include <stdint.h>
22
23#include <media/stagefright/MediaErrors.h>
24
25namespace android {
26
27class ESDS {
28public:
29    ESDS(const void *data, size_t size);
30    ~ESDS();
31
32    status_t InitCheck() const;
33
34    status_t getObjectTypeIndication(uint8_t *objectTypeIndication) const;
35    status_t getCodecSpecificInfo(const void **data, size_t *size) const;
36    status_t getCodecSpecificOffset(size_t *offset, size_t *size) const;
37    status_t getBitRate(uint32_t *brateMax, uint32_t *brateAvg) const;
38    status_t getStreamType(uint8_t *streamType) const;
39
40private:
41    enum {
42        kTag_ESDescriptor            = 0x03,
43        kTag_DecoderConfigDescriptor = 0x04,
44        kTag_DecoderSpecificInfo     = 0x05
45    };
46
47    uint8_t *mData;
48    size_t mSize;
49
50    status_t mInitCheck;
51
52    size_t mDecoderSpecificOffset;
53    size_t mDecoderSpecificLength;
54    uint8_t mObjectTypeIndication;
55    uint8_t mStreamType;
56    uint32_t mBitRateMax;
57    uint32_t mBitRateAvg;
58
59    status_t skipDescriptorHeader(
60            size_t offset, size_t size,
61            uint8_t *tag, size_t *data_offset, size_t *data_size) const;
62
63    status_t parse();
64    status_t parseESDescriptor(size_t offset, size_t size);
65    status_t parseDecoderConfigDescriptor(size_t offset, size_t size);
66
67    ESDS(const ESDS &);
68    ESDS &operator=(const ESDS &);
69};
70
71}  // namespace android
72#endif  // ESDS_H_
73