1 // Copyright 2014 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef MEDIA_FORMATS_MP2T_ES_PARSER_ADTS_H_ 6 #define MEDIA_FORMATS_MP2T_ES_PARSER_ADTS_H_ 7 8 #include <list> 9 #include <utility> 10 11 #include "base/callback.h" 12 #include "base/compiler_specific.h" 13 #include "base/memory/scoped_ptr.h" 14 #include "base/time/time.h" 15 #include "media/base/audio_decoder_config.h" 16 #include "media/base/media_export.h" 17 #include "media/formats/mp2t/es_parser.h" 18 19 namespace media { 20 class AudioTimestampHelper; 21 class BitReader; 22 class OffsetByteQueue; 23 class StreamParserBuffer; 24 } 25 26 namespace media { 27 namespace mp2t { 28 29 class MEDIA_EXPORT EsParserAdts : public EsParser { 30 public: 31 typedef base::Callback<void(const AudioDecoderConfig&)> NewAudioConfigCB; 32 33 EsParserAdts(const NewAudioConfigCB& new_audio_config_cb, 34 const EmitBufferCB& emit_buffer_cb, 35 bool sbr_in_mimetype); 36 virtual ~EsParserAdts(); 37 38 // EsParser implementation. 39 virtual void Flush() OVERRIDE; 40 41 private: 42 struct AdtsFrame; 43 44 // EsParser implementation. 45 virtual bool ParseFromEsQueue() OVERRIDE; 46 virtual void ResetInternal() OVERRIDE; 47 48 // Synchronize the stream on an ADTS syncword (consuming bytes from 49 // |es_queue_| if needed). 50 // Returns true when a full ADTS frame has been found: in that case 51 // |adts_frame| structure is filled up accordingly. 52 // Returns false otherwise (no ADTS syncword found or partial ADTS frame). 53 bool LookForAdtsFrame(AdtsFrame* adts_frame); 54 55 // Skip an ADTS frame in the ES queue. 56 void SkipAdtsFrame(const AdtsFrame& adts_frame); 57 58 // Signal any audio configuration change (if any). 59 // Return false if the current audio config is not 60 // a supported ADTS audio config. 61 bool UpdateAudioConfiguration(const uint8* adts_header); 62 63 // Callbacks: 64 // - to signal a new audio configuration, 65 // - to send ES buffers. 66 NewAudioConfigCB new_audio_config_cb_; 67 EmitBufferCB emit_buffer_cb_; 68 69 // True when AAC SBR extension is signalled in the mimetype 70 // (mp4a.40.5 in the codecs parameter). 71 bool sbr_in_mimetype_; 72 73 // Interpolated PTS for frames that don't have one. 74 scoped_ptr<AudioTimestampHelper> audio_timestamp_helper_; 75 76 // Last audio config. 77 AudioDecoderConfig last_audio_decoder_config_; 78 79 DISALLOW_COPY_AND_ASSIGN(EsParserAdts); 80 }; 81 82 } // namespace mp2t 83 } // namespace media 84 85 #endif 86