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54 lines
1.4 KiB
C++
54 lines
1.4 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef MEDIA_MP4_ES_DESCRIPTOR_H_
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#define MEDIA_MP4_ES_DESCRIPTOR_H_
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#include <vector>
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#include "mp4_demuxer/basictypes.h"
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namespace mp4_demuxer {
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class BitReader;
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// The following values are extracted from ISO 14496 Part 1 Table 5 -
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// objectTypeIndication Values. Only values currently in use are included.
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enum ObjectType {
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kForbidden = 0,
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kISO_14496_3 = 0x40, // MPEG4 AAC
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kISO_13818_7_AAC_LC = 0x67 // MPEG2 AAC-LC
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};
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// This class parse object type and decoder specific information from an
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// elementary stream descriptor, which is usually contained in an esds box.
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// Please refer to ISO 14496 Part 1 7.2.6.5 for more details.
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class ESDescriptor {
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public:
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ESDescriptor();
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~ESDescriptor();
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bool Parse(const std::vector<uint8_t>& data);
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uint8_t object_type() const;
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const std::vector<uint8_t>& decoder_specific_info() const;
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private:
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enum Tag {
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kESDescrTag = 0x03,
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kDecoderConfigDescrTag = 0x04,
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kDecoderSpecificInfoTag = 0x05
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};
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bool ParseDecoderConfigDescriptor(BitReader* reader);
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bool ParseDecoderSpecificInfo(BitReader* reader);
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uint8_t object_type_;
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std::vector<uint8_t> decoder_specific_info_;
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};
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} // namespace mp4_demuxer
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#endif // MEDIA_MP4_ES_DESCRIPTOR_H_
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