media/formats/mp2t/es_parser.cc

   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
  12 EsParser::TimingDesc::TimingDesc()
  13     : dts(kNoDecodeTimestamp()),
  14       pts(kNoTimestamp()) {
  15 }
  16
  17 EsParser::TimingDesc::TimingDesc(
  18     DecodeTimestamp dts_in, base::TimeDelta pts_in)
  19     : dts(dts_in),
  20       pts(pts_in) {
  21 }
  22
  23 EsParser::EsParser()
  24     : es_queue_(new media::OffsetByteQueue()) {
  25 }
  26
  27 EsParser::~EsParser() {
  28 }
  29
  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
  48 void EsParser::Reset() {
  49   es_queue_.reset(new media::OffsetByteQueue());
  50   timing_desc_list_.clear();
  51   ResetInternal();
  52 }
  53
  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