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/*
* Copyright (c) 2018 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 "modules/video_coding/decoder_database.h"
#include "rtc_base/checks.h"
#include "rtc_base/logging.h"
namespace webrtc {
VCMDecoderMapItem::VCMDecoderMapItem(VideoCodec* settings,
int number_of_cores,
bool require_key_frame)
: settings(settings),
number_of_cores(number_of_cores),
require_key_frame(require_key_frame) {
RTC_DCHECK_GE(number_of_cores, 0);
}
VCMExtDecoderMapItem::VCMExtDecoderMapItem(
VideoDecoder* external_decoder_instance,
uint8_t payload_type)
: payload_type(payload_type),
external_decoder_instance(external_decoder_instance) {}
VCMDecoderMapItem::~VCMDecoderMapItem() {}
VCMDecoderDataBase::VCMDecoderDataBase()
: receive_codec_(), dec_map_(), dec_external_map_() {}
VCMDecoderDataBase::~VCMDecoderDataBase() {
ptr_decoder_.reset();
for (auto& kv : dec_map_)
delete kv.second;
for (auto& kv : dec_external_map_)
delete kv.second;
}
bool VCMDecoderDataBase::DeregisterExternalDecoder(uint8_t payload_type) {
ExternalDecoderMap::iterator it = dec_external_map_.find(payload_type);
if (it == dec_external_map_.end()) {
// Not found.
return false;
}
// We can't use payload_type to check if the decoder is currently in use,
// because payload type may be out of date (e.g. before we decode the first
// frame after RegisterReceiveCodec).
if (ptr_decoder_ &&
ptr_decoder_->IsSameDecoder((*it).second->external_decoder_instance)) {
// Release it if it was registered and in use.
ptr_decoder_.reset();
}
DeregisterReceiveCodec(payload_type);
delete it->second;
dec_external_map_.erase(it);
return true;
}
// Add the external decoder object to the list of external decoders.
// Won't be registered as a receive codec until RegisterReceiveCodec is called.
void VCMDecoderDataBase::RegisterExternalDecoder(VideoDecoder* external_decoder,
uint8_t payload_type) {
// If payload value already exists, erase old and insert new.
VCMExtDecoderMapItem* ext_decoder =
new VCMExtDecoderMapItem(external_decoder, payload_type);
DeregisterExternalDecoder(payload_type);
dec_external_map_[payload_type] = ext_decoder;
}
bool VCMDecoderDataBase::RegisterReceiveCodec(const VideoCodec* receive_codec,
int number_of_cores,
bool require_key_frame) {
if (number_of_cores < 0) {
return false;
}
// If payload value already exists, erase old and insert new.
DeregisterReceiveCodec(receive_codec->plType);
VideoCodec* new_receive_codec = new VideoCodec(*receive_codec);
dec_map_[receive_codec->plType] = new VCMDecoderMapItem(
new_receive_codec, number_of_cores, require_key_frame);
return true;
}
bool VCMDecoderDataBase::DeregisterReceiveCodec(uint8_t payload_type) {
DecoderMap::iterator it = dec_map_.find(payload_type);
if (it == dec_map_.end()) {
return false;
}
delete it->second;
dec_map_.erase(it);
if (receive_codec_.plType == payload_type) {
// This codec is currently in use.
memset(&receive_codec_, 0, sizeof(VideoCodec));
}
return true;
}
VCMGenericDecoder* VCMDecoderDataBase::GetDecoder(
const VCMEncodedFrame& frame,
VCMDecodedFrameCallback* decoded_frame_callback) {
RTC_DCHECK(decoded_frame_callback->UserReceiveCallback());
uint8_t payload_type = frame.PayloadType();
if (payload_type == receive_codec_.plType || payload_type == 0) {
return ptr_decoder_.get();
}
// If decoder exists - delete.
if (ptr_decoder_) {
ptr_decoder_.reset();
memset(&receive_codec_, 0, sizeof(VideoCodec));
}
ptr_decoder_ = CreateAndInitDecoder(frame, &receive_codec_);
if (!ptr_decoder_) {
return nullptr;
}
VCMReceiveCallback* callback = decoded_frame_callback->UserReceiveCallback();
callback->OnIncomingPayloadType(receive_codec_.plType);
if (ptr_decoder_->RegisterDecodeCompleteCallback(decoded_frame_callback) <
0) {
ptr_decoder_.reset();
memset(&receive_codec_, 0, sizeof(VideoCodec));
return nullptr;
}
return ptr_decoder_.get();
}
bool VCMDecoderDataBase::PrefersLateDecoding() const {
return ptr_decoder_ ? ptr_decoder_->PrefersLateDecoding() : true;
}
std::unique_ptr<VCMGenericDecoder> VCMDecoderDataBase::CreateAndInitDecoder(
const VCMEncodedFrame& frame,
VideoCodec* new_codec) const {
uint8_t payload_type = frame.PayloadType();
RTC_LOG(LS_INFO) << "Initializing decoder with payload type '"
<< static_cast<int>(payload_type) << "'.";
RTC_DCHECK(new_codec);
const VCMDecoderMapItem* decoder_item = FindDecoderItem(payload_type);
if (!decoder_item) {
RTC_LOG(LS_ERROR) << "Can't find a decoder associated with payload type: "
<< static_cast<int>(payload_type);
return nullptr;
}
std::unique_ptr<VCMGenericDecoder> ptr_decoder;
const VCMExtDecoderMapItem* external_dec_item =
FindExternalDecoderItem(payload_type);
if (external_dec_item) {
// External codec.
ptr_decoder.reset(new VCMGenericDecoder(
external_dec_item->external_decoder_instance, true));
} else {
RTC_LOG(LS_ERROR) << "No decoder of this type exists.";
}
if (!ptr_decoder)
return nullptr;
// Copy over input resolutions to prevent codec reinitialization due to
// the first frame being of a different resolution than the database values.
// This is best effort, since there's no guarantee that width/height have been
// parsed yet (and may be zero).
if (frame.EncodedImage()._encodedWidth > 0 &&
frame.EncodedImage()._encodedHeight > 0) {
decoder_item->settings->width = frame.EncodedImage()._encodedWidth;
decoder_item->settings->height = frame.EncodedImage()._encodedHeight;
}
if (ptr_decoder->InitDecode(decoder_item->settings.get(),
decoder_item->number_of_cores) < 0) {
return nullptr;
}
memcpy(new_codec, decoder_item->settings.get(), sizeof(VideoCodec));
return ptr_decoder;
}
const VCMDecoderMapItem* VCMDecoderDataBase::FindDecoderItem(
uint8_t payload_type) const {
DecoderMap::const_iterator it = dec_map_.find(payload_type);
if (it != dec_map_.end()) {
return (*it).second;
}
return nullptr;
}
const VCMExtDecoderMapItem* VCMDecoderDataBase::FindExternalDecoderItem(
uint8_t payload_type) const {
ExternalDecoderMap::const_iterator it = dec_external_map_.find(payload_type);
if (it != dec_external_map_.end()) {
return (*it).second;
}
return nullptr;
}
} // namespace webrtc
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