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/*
* Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "webrtc/video_encoder.h"
#include "webrtc/base/checks.h"
#include "webrtc/base/logging.h"
#include "webrtc/modules/video_coding/codecs/h264/include/h264.h"
#include "webrtc/modules/video_coding/codecs/vp8/include/vp8.h"
#include "webrtc/modules/video_coding/codecs/vp9/include/vp9.h"
namespace webrtc {
VideoEncoder* VideoEncoder::Create(VideoEncoder::EncoderType codec_type) {
switch (codec_type) {
case kH264:
RTC_DCHECK(H264Encoder::IsSupported());
return H264Encoder::Create();
case kVp8:
return VP8Encoder::Create();
case kVp9:
return VP9Encoder::Create();
case kUnsupportedCodec:
RTC_NOTREACHED();
return nullptr;
}
RTC_NOTREACHED();
return nullptr;
}
VideoEncoder::EncoderType CodecToEncoderType(VideoCodecType codec_type) {
switch (codec_type) {
case kVideoCodecH264:
return VideoEncoder::kH264;
case kVideoCodecVP8:
return VideoEncoder::kVp8;
case kVideoCodecVP9:
return VideoEncoder::kVp9;
default:
return VideoEncoder::kUnsupportedCodec;
}
}
VideoEncoderSoftwareFallbackWrapper::VideoEncoderSoftwareFallbackWrapper(
VideoCodecType codec_type,
webrtc::VideoEncoder* encoder)
: rates_set_(false),
channel_parameters_set_(false),
encoder_type_(CodecToEncoderType(codec_type)),
encoder_(encoder),
callback_(nullptr) {}
bool VideoEncoderSoftwareFallbackWrapper::InitFallbackEncoder() {
RTC_CHECK(encoder_type_ != kUnsupportedCodec)
<< "Encoder requesting fallback to codec not supported in software.";
fallback_encoder_.reset(VideoEncoder::Create(encoder_type_));
if (fallback_encoder_->InitEncode(&codec_settings_, number_of_cores_,
max_payload_size_) !=
WEBRTC_VIDEO_CODEC_OK) {
LOG(LS_ERROR) << "Failed to initialize software-encoder fallback.";
fallback_encoder_->Release();
fallback_encoder_.reset();
return false;
}
// Replay callback, rates, and channel parameters.
if (callback_)
fallback_encoder_->RegisterEncodeCompleteCallback(callback_);
if (rates_set_)
fallback_encoder_->SetRates(bitrate_, framerate_);
if (channel_parameters_set_)
fallback_encoder_->SetChannelParameters(packet_loss_, rtt_);
// Since we're switching to the fallback encoder, Release the real encoder. It
// may be re-initialized via InitEncode later, and it will continue to get
// Set calls for rates and channel parameters in the meantime.
encoder_->Release();
return true;
}
int32_t VideoEncoderSoftwareFallbackWrapper::InitEncode(
const VideoCodec* codec_settings,
int32_t number_of_cores,
size_t max_payload_size) {
// Store settings, in case we need to dynamically switch to the fallback
// encoder after a failed Encode call.
codec_settings_ = *codec_settings;
number_of_cores_ = number_of_cores;
max_payload_size_ = max_payload_size;
// Clear stored rate/channel parameters.
rates_set_ = false;
channel_parameters_set_ = false;
int32_t ret =
encoder_->InitEncode(codec_settings, number_of_cores, max_payload_size);
if (ret == WEBRTC_VIDEO_CODEC_OK || encoder_type_ == kUnsupportedCodec) {
if (fallback_encoder_)
fallback_encoder_->Release();
fallback_encoder_.reset();
if (callback_)
encoder_->RegisterEncodeCompleteCallback(callback_);
return ret;
}
// Try to instantiate software codec.
if (InitFallbackEncoder()) {
return WEBRTC_VIDEO_CODEC_OK;
}
// Software encoder failed, use original return code.
return ret;
}
int32_t VideoEncoderSoftwareFallbackWrapper::RegisterEncodeCompleteCallback(
EncodedImageCallback* callback) {
callback_ = callback;
int32_t ret = encoder_->RegisterEncodeCompleteCallback(callback);
if (fallback_encoder_)
return fallback_encoder_->RegisterEncodeCompleteCallback(callback);
return ret;
}
int32_t VideoEncoderSoftwareFallbackWrapper::Release() {
// If the fallback_encoder_ is non-null, it means it was created via
// InitFallbackEncoder which has Release()d encoder_, so we should only ever
// need to Release() whichever one is active.
if (fallback_encoder_)
return fallback_encoder_->Release();
return encoder_->Release();
}
int32_t VideoEncoderSoftwareFallbackWrapper::Encode(
const VideoFrame& frame,
const CodecSpecificInfo* codec_specific_info,
const std::vector<FrameType>* frame_types) {
if (fallback_encoder_)
return fallback_encoder_->Encode(frame, codec_specific_info, frame_types);
int32_t ret = encoder_->Encode(frame, codec_specific_info, frame_types);
// If requested, try a software fallback.
if (ret == WEBRTC_VIDEO_CODEC_FALLBACK_SOFTWARE && InitFallbackEncoder()) {
// Fallback was successful, so start using it with this frame.
return fallback_encoder_->Encode(frame, codec_specific_info, frame_types);
}
return ret;
}
int32_t VideoEncoderSoftwareFallbackWrapper::SetChannelParameters(
uint32_t packet_loss,
int64_t rtt) {
channel_parameters_set_ = true;
packet_loss_ = packet_loss;
rtt_ = rtt;
int32_t ret = encoder_->SetChannelParameters(packet_loss, rtt);
if (fallback_encoder_)
return fallback_encoder_->SetChannelParameters(packet_loss, rtt);
return ret;
}
int32_t VideoEncoderSoftwareFallbackWrapper::SetRates(uint32_t bitrate,
uint32_t framerate) {
rates_set_ = true;
bitrate_ = bitrate;
framerate_ = framerate;
int32_t ret = encoder_->SetRates(bitrate, framerate);
if (fallback_encoder_)
return fallback_encoder_->SetRates(bitrate, framerate);
return ret;
}
void VideoEncoderSoftwareFallbackWrapper::OnDroppedFrame() {
if (fallback_encoder_)
return fallback_encoder_->OnDroppedFrame();
return encoder_->OnDroppedFrame();
}
bool VideoEncoderSoftwareFallbackWrapper::SupportsNativeHandle() const {
if (fallback_encoder_)
return fallback_encoder_->SupportsNativeHandle();
return encoder_->SupportsNativeHandle();
}
int VideoEncoderSoftwareFallbackWrapper::GetTargetFramerate() {
if (fallback_encoder_)
return fallback_encoder_->GetTargetFramerate();
return encoder_->GetTargetFramerate();
}
} // namespace webrtc
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