media/cast/framer/frame_buffer.cc

   1 // Copyright 2013 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/cast/framer/frame_buffer.h"
   6
   7 #include "base/logging.h"
   8
   9 namespace media {
  10 namespace cast {
  11
  12 FrameBuffer::FrameBuffer()
  13     : frame_id_(0),
  14       max_packet_id_(0),
  15       num_packets_received_(0),
  16       is_key_frame_(false),
  17       total_data_size_(0),
  18       last_referenced_frame_id_(0),
  19       packets_() {}
  20
  21 FrameBuffer::~FrameBuffer() {}
  22
  23 void FrameBuffer::InsertPacket(const uint8* payload_data,
  24                                size_t payload_size,
  25                                const RtpCastHeader& rtp_header) {
  26   // Is this the first packet in the frame?
  27   if (packets_.empty()) {
  28     frame_id_ = rtp_header.frame_id;
  29     max_packet_id_ = rtp_header.max_packet_id;
  30     is_key_frame_ = rtp_header.is_key_frame;
  31     last_referenced_frame_id_ = rtp_header.reference_frame_id;
  32     rtp_timestamp_ = rtp_header.rtp_timestamp;
  33   }
  34   // Is this the correct frame?
  35   if (rtp_header.frame_id != frame_id_)
  36     return;
  37
  38   // Insert every packet only once.
  39   if (packets_.find(rtp_header.packet_id) != packets_.end()) {
  40     return;
  41   }
  42
  43   std::vector<uint8> data;
  44   std::pair<PacketMap::iterator, bool> retval =
  45       packets_.insert(make_pair(rtp_header.packet_id, data));
  46
  47   // Insert the packet.
  48   retval.first->second.resize(payload_size);
  49   std::copy(
  50       payload_data, payload_data + payload_size, retval.first->second.begin());
  51
  52   ++num_packets_received_;
  53   total_data_size_ += payload_size;
  54 }
  55
  56 bool FrameBuffer::Complete() const {
  57   return num_packets_received_ - 1 == max_packet_id_;
  58 }
  59
  60 bool FrameBuffer::GetEncodedAudioFrame(
  61     transport::EncodedAudioFrame* audio_frame) const {
  62   if (!Complete())
  63     return false;
  64
  65   // Frame is complete -> construct.
  66   audio_frame->frame_id = frame_id_;
  67   audio_frame->rtp_timestamp = rtp_timestamp_;
  68
  69   // Build the data vector.
  70   audio_frame->data.clear();
  71   audio_frame->data.reserve(total_data_size_);
  72   PacketMap::const_iterator it;
  73   for (it = packets_.begin(); it != packets_.end(); ++it) {
  74     audio_frame->data.insert(
  75         audio_frame->data.end(), it->second.begin(), it->second.end());
  76   }
  77   return true;
  78 }
  79
  80 bool FrameBuffer::GetEncodedVideoFrame(
  81     transport::EncodedVideoFrame* video_frame) const {
  82   if (!Complete())
  83     return false;
  84   // Frame is complete -> construct.
  85   video_frame->key_frame = is_key_frame_;
  86   video_frame->frame_id = frame_id_;
  87   video_frame->last_referenced_frame_id = last_referenced_frame_id_;
  88   video_frame->rtp_timestamp = rtp_timestamp_;
  89
  90   // Build the data vector.
  91   video_frame->data.clear();
  92   video_frame->data.reserve(total_data_size_);
  93   PacketMap::const_iterator it;
  94   for (it = packets_.begin(); it != packets_.end(); ++it) {
  95     video_frame->data.insert(
  96         video_frame->data.end(), it->second.begin(), it->second.end());
  97   }
  98   return true;
  99 }
 100
 101 }  // namespace cast
 102 }  // namespace media