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author | xiaomings@google.com <xiaomings@google.com@0039d316-1c4b-4281-b951-d872f2087c98> | 2012-07-09 22:57:24 +0000 |
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committer | xiaomings@google.com <xiaomings@google.com@0039d316-1c4b-4281-b951-d872f2087c98> | 2012-07-09 22:57:24 +0000 |
commit | ecc703929354d51b5e48854d41e222c51497f5d3 (patch) | |
tree | ab65a0ecf2f03c629b3c87fe2fbd79472e2e5fa2 /media/mp4/es_descriptor.h | |
parent | eb55b4927d8f7593ca386ac670673a4108c9bc7b (diff) | |
download | chromium_src-ecc703929354d51b5e48854d41e222c51497f5d3.zip chromium_src-ecc703929354d51b5e48854d41e222c51497f5d3.tar.gz chromium_src-ecc703929354d51b5e48854d41e222c51497f5d3.tar.bz2 |
Add HE AAC support to ISO BMFF.
Also abstract common code in H264BitReader into BitReader for reusing.
Was: https://chromiumcodereview.appspot.com/10710002/
In the submitted patch of the last issue, the media.gyp included a non-existing file. This error hadn't been caught by try but later got caught by the build process and reverted the commit. So I create this issue to submit the fixed patch.
BUG=134445
TEST=BitReaderTest, AACTest
Review URL: https://chromiumcodereview.appspot.com/10753005
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@145769 0039d316-1c4b-4281-b951-d872f2087c98
Diffstat (limited to 'media/mp4/es_descriptor.h')
-rw-r--r-- | media/mp4/es_descriptor.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/media/mp4/es_descriptor.h b/media/mp4/es_descriptor.h new file mode 100644 index 0000000..daddbc0 --- /dev/null +++ b/media/mp4/es_descriptor.h @@ -0,0 +1,57 @@ +// Copyright (c) 2012 The Chromium Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +#ifndef MEDIA_MP4_ES_DESCRIPTOR_H_ +#define MEDIA_MP4_ES_DESCRIPTOR_H_ + +#include <vector> + +#include "base/basictypes.h" +#include "media/base/media_export.h" + +namespace media { + +class BitReader; + +namespace mp4 { + +// The following values are extracted from ISO 14496 Part 1 Table 5 - +// objectTypeIndication Values. Only values currently in use are included. +enum ObjectType { + kForbidden = 0, + kISO_14496_3 = 0x40 // MPEG4 AAC +}; + +// This class parse object type and decoder specific information from an +// elementary stream descriptor, which is usually contained in an esds box. +// Please refer to ISO 14496 Part 1 7.2.6.5 for more details. +class MEDIA_EXPORT ESDescriptor { + public: + ESDescriptor(); + ~ESDescriptor(); + + bool Parse(const std::vector<uint8>& data); + + uint8 object_type() const; + const std::vector<uint8>& decoder_specific_info() const; + + private: + enum Tag { + kESDescrTag = 0x03, + kDecoderConfigDescrTag = 0x04, + kDecoderSpecificInfoTag = 0x05 + }; + + bool ParseDecoderConfigDescriptor(BitReader* reader); + bool ParseDecoderSpecificInfo(BitReader* reader); + + uint8 object_type_; + std::vector<uint8> decoder_specific_info_; +}; + +} // namespace mp4 + +} // namespace media + +#endif // MEDIA_MP4_ES_DESCRIPTOR_H_ |