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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.
*/
#ifndef MODULES_VIDEO_CODING_DECODER_DATABASE_H_
#define MODULES_VIDEO_CODING_DECODER_DATABASE_H_
#include <stdint.h>
#include <map>
#include <memory>
#include "absl/types/optional.h"
#include "api/sequence_checker.h"
#include "api/video_codecs/video_decoder.h"
#include "modules/video_coding/encoded_frame.h"
#include "modules/video_coding/generic_decoder.h"
namespace webrtc {
class VCMDecoderDatabase {
public:
VCMDecoderDatabase();
VCMDecoderDatabase(const VCMDecoderDatabase&) = delete;
VCMDecoderDatabase& operator=(const VCMDecoderDatabase&) = delete;
~VCMDecoderDatabase() = default;
// Returns a pointer to the previously registered decoder or nullptr if none
// was registered for the `payload_type`.
void DeregisterExternalDecoder(uint8_t payload_type);
void RegisterExternalDecoder(uint8_t payload_type,
std::unique_ptr<VideoDecoder> external_decoder);
bool IsExternalDecoderRegistered(uint8_t payload_type) const;
void RegisterReceiveCodec(uint8_t payload_type,
const VideoDecoder::Settings& settings);
bool DeregisterReceiveCodec(uint8_t payload_type);
void DeregisterReceiveCodecs();
// Returns a decoder specified by frame.PayloadType. The decoded frame
// callback of the decoder is set to `decoded_frame_callback`. If no such
// decoder already exists an instance will be created and initialized.
// nullptr is returned if no decoder with the specified payload type was found
// and the function failed to create one.
VCMGenericDecoder* GetDecoder(
const VCMEncodedFrame& frame,
VCMDecodedFrameCallback* decoded_frame_callback);
private:
void CreateAndInitDecoder(const VCMEncodedFrame& frame)
RTC_RUN_ON(decoder_sequence_checker_);
SequenceChecker decoder_sequence_checker_;
absl::optional<uint8_t> current_payload_type_;
absl::optional<VCMGenericDecoder> current_decoder_
RTC_GUARDED_BY(decoder_sequence_checker_);
// Initialization paramaters for decoders keyed by payload type.
std::map<uint8_t, VideoDecoder::Settings> decoder_settings_;
// Decoders keyed by payload type.
std::map<uint8_t, std::unique_ptr<VideoDecoder>> decoders_
RTC_GUARDED_BY(decoder_sequence_checker_);
};
} // namespace webrtc
#endif // MODULES_VIDEO_CODING_DECODER_DATABASE_H_
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