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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "media/cast/framer/frame_buffer.h"
namespace media {
namespace cast {
FrameBuffer::FrameBuffer()
: frame_id_(0),
max_packet_id_(0),
num_packets_received_(0),
is_key_frame_(false),
total_data_size_(0),
last_referenced_frame_id_(0),
packets_() {}
FrameBuffer::~FrameBuffer() {}
void FrameBuffer::InsertPacket(const uint8* payload_data,
int payload_size,
const RtpCastHeader& rtp_header) {
// Is this the first packet in the frame?
if (packets_.empty()) {
frame_id_ = rtp_header.frame_id;
max_packet_id_ = rtp_header.max_packet_id;
is_key_frame_ = rtp_header.is_key_frame;
if (rtp_header.is_reference) {
last_referenced_frame_id_ = rtp_header.reference_frame_id;
} else {
last_referenced_frame_id_ = static_cast<uint8>(rtp_header.frame_id - 1);
}
rtp_timestamp_ = rtp_header.webrtc.header.timestamp;
}
// Is this the correct frame?
if (rtp_header.frame_id != frame_id_) return;
// Insert every packet only once.
if (packets_.find(rtp_header.packet_id) != packets_.end()) return;
std::vector<uint8> data;
std::pair<PacketMap::iterator, bool> retval =
packets_.insert(make_pair(rtp_header.packet_id, data));
// Insert the packet.
retval.first->second.resize(payload_size);
std::copy(payload_data, payload_data + payload_size,
retval.first->second.begin());
++num_packets_received_;
total_data_size_ += payload_size;
}
bool FrameBuffer::Complete() const {
return num_packets_received_ - 1 == max_packet_id_;
}
bool FrameBuffer::GetEncodedAudioFrame(EncodedAudioFrame* audio_frame,
uint32* rtp_timestamp) const {
if (!Complete()) return false;
*rtp_timestamp = rtp_timestamp_;
// Frame is complete -> construct.
audio_frame->frame_id = frame_id_;
// Build the data vector.
audio_frame->data.clear();
audio_frame->data.reserve(total_data_size_);
PacketMap::const_iterator it;
for (it = packets_.begin(); it != packets_.end(); ++it) {
audio_frame->data.insert(audio_frame->data.end(),
it->second.begin(), it->second.end());
}
return true;
}
bool FrameBuffer::GetEncodedVideoFrame(EncodedVideoFrame* video_frame,
uint32* rtp_timestamp) const {
if (!Complete()) return false;
*rtp_timestamp = rtp_timestamp_;
// Frame is complete -> construct.
video_frame->key_frame = is_key_frame_;
video_frame->frame_id = frame_id_;
video_frame->last_referenced_frame_id = last_referenced_frame_id_;
// Build the data vector.
video_frame->data.clear();
video_frame->data.reserve(total_data_size_);
PacketMap::const_iterator it;
for (it = packets_.begin(); it != packets_.end(); ++it) {
video_frame->data.insert(video_frame->data.end(),
it->second.begin(), it->second.end());
}
return true;
}
} // namespace cast
} // namespace media
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