1 // Copyright (c) 2012 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_BASE_STREAM_PARSER_BUFFER_H_ 6 #define MEDIA_BASE_STREAM_PARSER_BUFFER_H_ 7 8 #include <deque> 9 10 #include "media/base/decoder_buffer.h" 11 #include "media/base/demuxer_stream.h" 12 #include "media/base/media_export.h" 13 #include "media/base/stream_parser.h" 14 15 namespace media { 16 17 class MEDIA_EXPORT StreamParserBuffer : public DecoderBuffer { 18 public: 19 // Value used to signal an invalid decoder config ID. 20 enum { kInvalidConfigId = -1 }; 21 22 typedef DemuxerStream::Type Type; 23 typedef StreamParser::TrackId TrackId; 24 25 static scoped_refptr<StreamParserBuffer> CreateEOSBuffer(); 26 27 static scoped_refptr<StreamParserBuffer> CopyFrom( 28 const uint8* data, int data_size, bool is_keyframe, Type type, 29 TrackId track_id); 30 static scoped_refptr<StreamParserBuffer> CopyFrom( 31 const uint8* data, int data_size, 32 const uint8* side_data, int side_data_size, bool is_keyframe, Type type, 33 TrackId track_id); 34 bool IsKeyframe() const { return is_keyframe_; } 35 36 // Decode timestamp. If not explicitly set, or set to kNoTimestamp(), the 37 // value will be taken from the normal timestamp. 38 base::TimeDelta GetDecodeTimestamp() const; 39 void SetDecodeTimestamp(base::TimeDelta timestamp); 40 41 // Gets/sets the ID of the decoder config associated with this buffer. 42 int GetConfigId() const; 43 void SetConfigId(int config_id); 44 45 // Gets the parser's media type associated with this buffer. Value is 46 // meaningless for EOS buffers. 47 Type type() const { return type_; } 48 49 // Gets the parser's track ID associated with this buffer. Value is 50 // meaningless for EOS buffers. 51 TrackId track_id() const { return track_id_; } 52 53 // Converts this buffer to a splice buffer. |pre_splice_buffers| must not 54 // have any EOS buffers, must not have any splice buffers, nor must have any 55 // buffer with preroll. 56 // 57 // |pre_splice_buffers| will be deep copied and each copy's splice_timestamp() 58 // will be set to this buffer's splice_timestamp(). A copy of |this|, with a 59 // splice_timestamp() of kNoTimestamp(), will be added to the end of 60 // |splice_buffers_|. 61 // 62 // See the Audio Splice Frame Algorithm in the MSE specification for details. 63 typedef StreamParser::BufferQueue BufferQueue; 64 void ConvertToSpliceBuffer(const BufferQueue& pre_splice_buffers); 65 const BufferQueue& splice_buffers() const { return splice_buffers_; } 66 67 // Specifies a buffer which must be decoded prior to this one to ensure this 68 // buffer can be accurately decoded. The given buffer must be of the same 69 // type, must not be a splice buffer, must not have any discard padding, and 70 // must not be an end of stream buffer. |preroll| is not copied. 71 // 72 // It's expected that this preroll buffer will be discarded entirely post 73 // decoding. As such it's discard_padding() will be set to kInfiniteDuration. 74 // 75 // All future timestamp, decode timestamp, config id, or track id changes to 76 // this buffer will be applied to the preroll buffer as well. 77 void SetPrerollBuffer(const scoped_refptr<StreamParserBuffer>& preroll); 78 const scoped_refptr<StreamParserBuffer>& preroll_buffer() { 79 return preroll_buffer_; 80 } 81 82 virtual void set_timestamp(base::TimeDelta timestamp) OVERRIDE; 83 84 private: 85 StreamParserBuffer(const uint8* data, int data_size, 86 const uint8* side_data, int side_data_size, 87 bool is_keyframe, Type type, 88 TrackId track_id); 89 virtual ~StreamParserBuffer(); 90 91 bool is_keyframe_; 92 base::TimeDelta decode_timestamp_; 93 int config_id_; 94 Type type_; 95 TrackId track_id_; 96 BufferQueue splice_buffers_; 97 scoped_refptr<StreamParserBuffer> preroll_buffer_; 98 99 DISALLOW_COPY_AND_ASSIGN(StreamParserBuffer); 100 }; 101 102 } // namespace media 103 104 #endif // MEDIA_BASE_STREAM_PARSER_BUFFER_H_ 105
