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.
5 #ifndef MEDIA_FORMATS_MP2T_ES_PARSER_H264_H_
6 #define MEDIA_FORMATS_MP2T_ES_PARSER_H264_H_
11 #include "base/basictypes.h"
12 #include "base/callback.h"
13 #include "base/compiler_specific.h"
14 #include "base/time/time.h"
15 #include "media/base/byte_queue.h"
16 #include "media/base/video_decoder_config.h"
17 #include "media/formats/mp2t/es_parser.h"
21 class StreamParserBuffer;
28 // In this h264 parser, frame splitting is based on AUD nals.
29 // Mpeg2 TS spec: "2.14 Carriage of Rec. ITU-T H.264 | ISO/IEC 14496-10 video"
30 // "Each AVC access unit shall contain an access unit delimiter NAL Unit;"
32 class EsParserH264 : public EsParser {
34 typedef base::Callback<void(const VideoDecoderConfig&)> NewVideoConfigCB;
36 EsParserH264(const NewVideoConfigCB& new_video_config_cb,
37 const EmitBufferCB& emit_buffer_cb);
38 virtual ~EsParserH264();
40 // EsParser implementation.
41 virtual bool Parse(const uint8* buf, int size,
43 base::TimeDelta dts) OVERRIDE;
44 virtual void Flush() OVERRIDE;
45 virtual void Reset() OVERRIDE;
54 // It resumes parsing from byte position |es_pos_|.
57 // Emit a frame if a frame has been started earlier.
58 // Returns true if successful, false if no PTS is available for the frame.
59 bool EmitFrameIfNeeded(int next_aud_pos);
62 // Note: if aud_pos < 0, clear the current frame.
63 void StartFrame(int aud_pos);
65 // Discard |nbytes| of ES from the ES byte queue.
66 void DiscardEs(int nbytes);
69 // Returns true if successful (compliant bitstream).
70 bool NalParser(const uint8* buf, int size);
71 bool ProcessSPS(const uint8* buf, int size);
73 // Callbacks to pass the stream configuration and the frames.
74 NewVideoConfigCB new_video_config_cb_;
75 EmitBufferCB emit_buffer_cb_;
77 // Bytes of the ES stream that have not been emitted yet.
78 ByteQueue es_byte_queue_;
79 std::list<std::pair<int, TimingDesc> > timing_desc_list_;
82 // Note: |current_access_unit_pos_| is pointing to an annexB syncword
83 // while |current_nal_pos_| is pointing to the NAL unit
84 // (i.e. does not include the annexB syncword).
87 int current_access_unit_pos_;
90 // Last video decoder config.
91 VideoDecoderConfig last_video_decoder_config_;