blob: 6a234d54de0d1e068d12684f38e0ad2e8162ec8c [file] [log] [blame]
/*
* Copyright (c) 2016 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/media/engine/videodecodersoftwarefallbackwrapper.h"
#include <string>
#include "webrtc/media/engine/internaldecoderfactory.h"
#include "webrtc/modules/video_coding/include/video_error_codes.h"
#include "webrtc/rtc_base/checks.h"
#include "webrtc/rtc_base/logging.h"
#include "webrtc/rtc_base/trace_event.h"
namespace webrtc {
VideoDecoderSoftwareFallbackWrapper::VideoDecoderSoftwareFallbackWrapper(
VideoCodecType codec_type,
VideoDecoder* decoder)
: codec_type_(codec_type),
decoder_(decoder),
decoder_initialized_(false),
callback_(nullptr) {}
int32_t VideoDecoderSoftwareFallbackWrapper::InitDecode(
const VideoCodec* codec_settings,
int32_t number_of_cores) {
RTC_DCHECK(!fallback_decoder_) << "Fallback decoder should never be "
"initialized here, it should've been "
"released.";
codec_settings_ = *codec_settings;
number_of_cores_ = number_of_cores;
int32_t ret = decoder_->InitDecode(codec_settings, number_of_cores);
if (ret != WEBRTC_VIDEO_CODEC_FALLBACK_SOFTWARE) {
decoder_initialized_ = (ret == WEBRTC_VIDEO_CODEC_OK);
return ret;
}
decoder_initialized_ = false;
// Try to initialize fallback decoder.
if (InitFallbackDecoder())
return WEBRTC_VIDEO_CODEC_OK;
return ret;
}
bool VideoDecoderSoftwareFallbackWrapper::InitFallbackDecoder() {
RTC_CHECK(codec_type_ != kVideoCodecUnknown)
<< "Decoder requesting fallback to codec not supported in software.";
LOG(LS_WARNING) << "Decoder falling back to software decoding.";
cricket::InternalDecoderFactory internal_decoder_factory;
fallback_decoder_.reset(
internal_decoder_factory.CreateVideoDecoder(codec_type_));
if (fallback_decoder_->InitDecode(&codec_settings_, number_of_cores_) !=
WEBRTC_VIDEO_CODEC_OK) {
LOG(LS_ERROR) << "Failed to initialize software-decoder fallback.";
fallback_decoder_.reset();
return false;
}
if (callback_)
fallback_decoder_->RegisterDecodeCompleteCallback(callback_);
fallback_implementation_name_ =
std::string(fallback_decoder_->ImplementationName()) +
" (fallback from: " + decoder_->ImplementationName() + ")";
return true;
}
int32_t VideoDecoderSoftwareFallbackWrapper::Decode(
const EncodedImage& input_image,
bool missing_frames,
const RTPFragmentationHeader* fragmentation,
const CodecSpecificInfo* codec_specific_info,
int64_t render_time_ms) {
TRACE_EVENT0("webrtc", "VideoDecoderSoftwareFallbackWrapper::Decode");
// Try initializing and decoding with the provided decoder on every keyframe
// or when there's no fallback decoder. This is the normal case.
if (!fallback_decoder_ || input_image._frameType == kVideoFrameKey) {
int32_t ret = WEBRTC_VIDEO_CODEC_FALLBACK_SOFTWARE;
// Try reinitializing the decoder if it had failed before.
if (!decoder_initialized_) {
decoder_initialized_ =
decoder_->InitDecode(&codec_settings_, number_of_cores_) ==
WEBRTC_VIDEO_CODEC_OK;
}
if (decoder_initialized_) {
ret = decoder_->Decode(input_image, missing_frames, fragmentation,
codec_specific_info, render_time_ms);
}
if (ret == WEBRTC_VIDEO_CODEC_OK) {
if (fallback_decoder_) {
// Decode OK -> stop using fallback decoder.
LOG(LS_WARNING)
<< "Decode OK, no longer using the software fallback decoder.";
fallback_decoder_->Release();
fallback_decoder_.reset();
return WEBRTC_VIDEO_CODEC_OK;
}
}
if (ret != WEBRTC_VIDEO_CODEC_FALLBACK_SOFTWARE)
return ret;
if (!fallback_decoder_) {
// Try to initialize fallback decoder.
if (!InitFallbackDecoder())
return ret;
}
}
return fallback_decoder_->Decode(input_image, missing_frames, fragmentation,
codec_specific_info, render_time_ms);
}
int32_t VideoDecoderSoftwareFallbackWrapper::RegisterDecodeCompleteCallback(
DecodedImageCallback* callback) {
callback_ = callback;
int32_t ret = decoder_->RegisterDecodeCompleteCallback(callback);
if (fallback_decoder_)
return fallback_decoder_->RegisterDecodeCompleteCallback(callback);
return ret;
}
int32_t VideoDecoderSoftwareFallbackWrapper::Release() {
if (fallback_decoder_) {
LOG(LS_INFO) << "Releasing software fallback decoder.";
fallback_decoder_->Release();
fallback_decoder_.reset();
}
decoder_initialized_ = false;
return decoder_->Release();
}
bool VideoDecoderSoftwareFallbackWrapper::PrefersLateDecoding() const {
if (fallback_decoder_)
return fallback_decoder_->PrefersLateDecoding();
return decoder_->PrefersLateDecoding();
}
const char* VideoDecoderSoftwareFallbackWrapper::ImplementationName() const {
if (fallback_decoder_)
return fallback_implementation_name_.c_str();
return decoder_->ImplementationName();
}
} // namespace webrtc