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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/framer.h"
#include "base/logging.h"
namespace media {
namespace cast {
typedef FrameList::const_iterator ConstFrameIterator;
Framer::Framer(base::TickClock* clock,
RtpPayloadFeedback* incoming_payload_feedback,
uint32 ssrc,
bool decoder_faster_than_max_frame_rate,
int max_unacked_frames)
: decoder_faster_than_max_frame_rate_(decoder_faster_than_max_frame_rate),
cast_msg_builder_(new CastMessageBuilder(clock, incoming_payload_feedback,
&frame_id_map_, ssrc, decoder_faster_than_max_frame_rate,
max_unacked_frames)) {
DCHECK(incoming_payload_feedback) << "Invalid argument";
}
Framer::~Framer() {}
bool Framer::InsertPacket(const uint8* payload_data,
size_t payload_size,
const RtpCastHeader& rtp_header) {
bool complete = false;
if (!frame_id_map_.InsertPacket(rtp_header, &complete)) return false;
// Does this packet belong to a new frame?
FrameList::iterator it = frames_.find(rtp_header.frame_id);
if (it == frames_.end()) {
// New frame.
linked_ptr<FrameBuffer> frame_buffer(new FrameBuffer());
frame_buffer->InsertPacket(payload_data, payload_size, rtp_header);
frames_.insert(std::make_pair(rtp_header.frame_id, frame_buffer));
} else {
// Insert packet to existing frame buffer.
it->second->InsertPacket(payload_data, payload_size, rtp_header);
}
if (complete) {
// ACK as soon as possible.
VLOG(1) << "Complete frame " << static_cast<int>(rtp_header.frame_id);
cast_msg_builder_->CompleteFrameReceived(rtp_header.frame_id,
rtp_header.is_key_frame);
}
return complete;
}
// This does not release the frame.
bool Framer::GetEncodedAudioFrame(EncodedAudioFrame* audio_frame,
uint32* rtp_timestamp,
bool* next_frame) {
uint32 frame_id;
// Find frame id.
if (frame_id_map_.NextContinuousFrame(&frame_id)) {
// We have our next frame.
*next_frame = true;
} else {
if (!frame_id_map_.NextAudioFrameAllowingMissingFrames(&frame_id)) {
return false;
}
*next_frame = false;
}
ConstFrameIterator it = frames_.find(frame_id);
DCHECK(it != frames_.end());
if (it == frames_.end()) return false;
return it->second->GetEncodedAudioFrame(audio_frame, rtp_timestamp);
}
// This does not release the frame.
bool Framer::GetEncodedVideoFrame(EncodedVideoFrame* video_frame,
uint32* rtp_timestamp,
bool* next_frame) {
uint32 frame_id;
// Find frame id.
if (frame_id_map_.NextContinuousFrame(&frame_id)) {
// We have our next frame.
*next_frame = true;
} else {
// Check if we can skip frames when our decoder is too slow.
if (!decoder_faster_than_max_frame_rate_) return false;
if (!frame_id_map_.NextVideoFrameAllowingSkippingFrames(&frame_id)) {
return false;
}
*next_frame = false;
}
ConstFrameIterator it = frames_.find(frame_id);
DCHECK(it != frames_.end());
if (it == frames_.end()) return false;
return it->second->GetEncodedVideoFrame(video_frame, rtp_timestamp);
}
void Framer::Reset() {
frame_id_map_.Clear();
frames_.clear();
cast_msg_builder_->Reset();
}
void Framer::ReleaseFrame(uint32 frame_id) {
frame_id_map_.RemoveOldFrames(frame_id);
frames_.erase(frame_id);
// We have a frame - remove all frames with lower frame id.
bool skipped_old_frame = false;
FrameList::iterator it;
for (it = frames_.begin(); it != frames_.end(); ) {
if (IsOlderFrameId(it->first, frame_id)) {
frames_.erase(it++);
skipped_old_frame = true;
} else {
++it;
}
}
if (skipped_old_frame) {
cast_msg_builder_->UpdateCastMessage();
}
}
bool Framer::TimeToSendNextCastMessage(base::TimeTicks* time_to_send) {
return cast_msg_builder_->TimeToSendNextCastMessage(time_to_send);
}
void Framer::SendCastMessage() {
cast_msg_builder_->UpdateCastMessage();
}
} // namespace cast
} // namespace media
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