15d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)// Copyright 2014 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)#ifndef MEDIA_FORMATS_MP4_ES_DESCRIPTOR_H_ 65d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)#define MEDIA_FORMATS_MP4_ES_DESCRIPTOR_H_ 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <vector> 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/basictypes.h" 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "media/base/media_export.h" 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace media { 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class BitReader; 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace mp4 { 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// The following values are extracted from ISO 14496 Part 1 Table 5 - 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// objectTypeIndication Values. Only values currently in use are included. 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)enum ObjectType { 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) kForbidden = 0, 232a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) kISO_14496_3 = 0x40, // MPEG4 AAC 245d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) kISO_13818_7_AAC_LC = 0x67 // MPEG2 AAC-LC 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// This class parse object type and decoder specific information from an 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// elementary stream descriptor, which is usually contained in an esds box. 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Please refer to ISO 14496 Part 1 7.2.6.5 for more details. 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class MEDIA_EXPORT ESDescriptor { 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public: 32c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) // Utility function to check if the given object type is AAC. 33c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) static bool IsAAC(uint8 object_type); 34c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ESDescriptor(); 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ~ESDescriptor(); 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool Parse(const std::vector<uint8>& data); 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint8 object_type() const; 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const std::vector<uint8>& decoder_specific_info() const; 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) private: 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) enum Tag { 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) kESDescrTag = 0x03, 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) kDecoderConfigDescrTag = 0x04, 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) kDecoderSpecificInfoTag = 0x05 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) }; 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool ParseDecoderConfigDescriptor(BitReader* reader); 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool ParseDecoderSpecificInfo(BitReader* reader); 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint8 object_type_; 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::vector<uint8> decoder_specific_info_; 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace mp4 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace media 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 615d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)#endif // MEDIA_FORMATS_MP4_ES_DESCRIPTOR_H_ 62