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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 #include "media/formats/mp2t/es_parser.h"
6 
7 #include "media/formats/common/offset_byte_queue.h"
8 
9 namespace media {
10 namespace mp2t {
11 
TimingDesc()12 EsParser::TimingDesc::TimingDesc()
13     : dts(kNoDecodeTimestamp()),
14       pts(kNoTimestamp()) {
15 }
16 
TimingDesc(DecodeTimestamp dts_in,base::TimeDelta pts_in)17 EsParser::TimingDesc::TimingDesc(
18     DecodeTimestamp dts_in, base::TimeDelta pts_in)
19     : dts(dts_in),
20       pts(pts_in) {
21 }
22 
EsParser()23 EsParser::EsParser()
24     : es_queue_(new media::OffsetByteQueue()) {
25 }
26 
~EsParser()27 EsParser::~EsParser() {
28 }
29 
Parse(const uint8 * buf,int size,base::TimeDelta pts,DecodeTimestamp dts)30 bool EsParser::Parse(const uint8* buf, int size,
31                      base::TimeDelta pts,
32                      DecodeTimestamp dts) {
33   DCHECK(buf);
34   DCHECK_GT(size, 0);
35 
36   if (pts != kNoTimestamp()) {
37     // Link the end of the byte queue with the incoming timing descriptor.
38     TimingDesc timing_desc(dts, pts);
39     timing_desc_list_.push_back(
40         std::pair<int64, TimingDesc>(es_queue_->tail(), timing_desc));
41   }
42 
43   // Add the incoming bytes to the ES queue.
44   es_queue_->Push(buf, size);
45   return ParseFromEsQueue();
46 }
47 
Reset()48 void EsParser::Reset() {
49   es_queue_.reset(new media::OffsetByteQueue());
50   timing_desc_list_.clear();
51   ResetInternal();
52 }
53 
GetTimingDescriptor(int64 es_byte_count)54 EsParser::TimingDesc EsParser::GetTimingDescriptor(int64 es_byte_count) {
55   TimingDesc timing_desc;
56   while (!timing_desc_list_.empty() &&
57          timing_desc_list_.front().first <= es_byte_count) {
58     timing_desc = timing_desc_list_.front().second;
59     timing_desc_list_.pop_front();
60   }
61   return timing_desc;
62 }
63 
64 }  // namespace mp2t
65 }  // namespace media
66