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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_decoder.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 {
VideoDecoder* VideoDecoder::Create(VideoDecoder::DecoderType codec_type) {
switch (codec_type) {
case kH264:
RTC_DCHECK(H264Decoder::IsSupported());
return H264Decoder::Create();
case kVp8:
return VP8Decoder::Create();
case kVp9:
return VP9Decoder::Create();
case kUnsupportedCodec:
RTC_NOTREACHED();
return nullptr;
}
RTC_NOTREACHED();
return nullptr;
}
VideoDecoder::DecoderType CodecTypeToDecoderType(VideoCodecType codec_type) {
switch (codec_type) {
case kVideoCodecH264:
return VideoDecoder::kH264;
case kVideoCodecVP8:
return VideoDecoder::kVp8;
case kVideoCodecVP9:
return VideoDecoder::kVp9;
default:
return VideoDecoder::kUnsupportedCodec;
}
}
VideoDecoderSoftwareFallbackWrapper::VideoDecoderSoftwareFallbackWrapper(
VideoCodecType codec_type,
VideoDecoder* decoder)
: decoder_type_(CodecTypeToDecoderType(codec_type)),
decoder_(decoder),
callback_(nullptr) {
}
int32_t VideoDecoderSoftwareFallbackWrapper::InitDecode(
const VideoCodec* codec_settings,
int32_t number_of_cores) {
codec_settings_ = *codec_settings;
number_of_cores_ = number_of_cores;
return decoder_->InitDecode(codec_settings, number_of_cores);
}
bool VideoDecoderSoftwareFallbackWrapper::InitFallbackDecoder() {
RTC_CHECK(decoder_type_ != kUnsupportedCodec)
<< "Decoder requesting fallback to codec not supported in software.";
LOG(LS_WARNING) << "Decoder falling back to software decoding.";
fallback_decoder_.reset(VideoDecoder::Create(decoder_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_ != nullptr)
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) {
// Try 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 = 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.
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_)
fallback_decoder_->Release();
return decoder_->Release();
}
int32_t VideoDecoderSoftwareFallbackWrapper::Reset() {
if (fallback_decoder_)
fallback_decoder_->Reset();
return decoder_->Reset();
}
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
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