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// Copyright 2014 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/sender/video_encoder_impl.h"
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/callback.h"
#include "base/logging.h"
#include "base/message_loop/message_loop.h"
#include "media/base/video_frame.h"
#include "media/cast/cast_defines.h"
#include "media/cast/sender/fake_software_video_encoder.h"
#include "media/cast/sender/vp8_encoder.h"
namespace media {
namespace cast {
namespace {
typedef base::Callback<void(Vp8Encoder*)> PassEncoderCallback;
void InitializeEncoderOnEncoderThread(
const scoped_refptr<CastEnvironment>& environment,
SoftwareVideoEncoder* encoder) {
DCHECK(environment->CurrentlyOn(CastEnvironment::VIDEO));
encoder->Initialize();
}
void EncodeVideoFrameOnEncoderThread(
scoped_refptr<CastEnvironment> environment,
SoftwareVideoEncoder* encoder,
const scoped_refptr<media::VideoFrame>& video_frame,
const base::TimeTicks& reference_time,
const VideoEncoderImpl::CodecDynamicConfig& dynamic_config,
const VideoEncoderImpl::FrameEncodedCallback& frame_encoded_callback) {
DCHECK(environment->CurrentlyOn(CastEnvironment::VIDEO));
if (dynamic_config.key_frame_requested) {
encoder->GenerateKeyFrame();
}
encoder->LatestFrameIdToReference(
dynamic_config.latest_frame_id_to_reference);
encoder->UpdateRates(dynamic_config.bit_rate);
scoped_ptr<EncodedFrame> encoded_frame(new EncodedFrame());
encoder->Encode(video_frame, reference_time, encoded_frame.get());
environment->PostTask(
CastEnvironment::MAIN,
FROM_HERE,
base::Bind(frame_encoded_callback, base::Passed(&encoded_frame)));
}
} // namespace
VideoEncoderImpl::VideoEncoderImpl(
scoped_refptr<CastEnvironment> cast_environment,
const VideoSenderConfig& video_config,
int max_unacked_frames)
: cast_environment_(cast_environment) {
if (video_config.codec == CODEC_VIDEO_VP8) {
encoder_.reset(new Vp8Encoder(video_config, max_unacked_frames));
cast_environment_->PostTask(CastEnvironment::VIDEO,
FROM_HERE,
base::Bind(&InitializeEncoderOnEncoderThread,
cast_environment,
encoder_.get()));
#ifndef OFFICIAL_BUILD
} else if (video_config.codec == CODEC_VIDEO_FAKE) {
encoder_.reset(new FakeSoftwareVideoEncoder(video_config));
#endif
} else {
DCHECK(false) << "Invalid config"; // Codec not supported.
}
dynamic_config_.key_frame_requested = false;
dynamic_config_.latest_frame_id_to_reference = kStartFrameId;
dynamic_config_.bit_rate = video_config.start_bitrate;
}
VideoEncoderImpl::~VideoEncoderImpl() {
DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN));
if (encoder_) {
cast_environment_->PostTask(
CastEnvironment::VIDEO,
FROM_HERE,
base::Bind(&base::DeletePointer<SoftwareVideoEncoder>,
encoder_.release()));
}
}
bool VideoEncoderImpl::EncodeVideoFrame(
const scoped_refptr<media::VideoFrame>& video_frame,
const base::TimeTicks& reference_time,
const FrameEncodedCallback& frame_encoded_callback) {
DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN));
cast_environment_->PostTask(CastEnvironment::VIDEO,
FROM_HERE,
base::Bind(&EncodeVideoFrameOnEncoderThread,
cast_environment_,
encoder_.get(),
video_frame,
reference_time,
dynamic_config_,
frame_encoded_callback));
dynamic_config_.key_frame_requested = false;
return true;
}
// Inform the encoder about the new target bit rate.
void VideoEncoderImpl::SetBitRate(int new_bit_rate) {
dynamic_config_.bit_rate = new_bit_rate;
}
// Inform the encoder to encode the next frame as a key frame.
void VideoEncoderImpl::GenerateKeyFrame() {
dynamic_config_.key_frame_requested = true;
}
// Inform the encoder to only reference frames older or equal to frame_id;
void VideoEncoderImpl::LatestFrameIdToReference(uint32 frame_id) {
dynamic_config_.latest_frame_id_to_reference = frame_id;
}
} // namespace cast
} // namespace media
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