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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_PEERCONNECTION_WEBRTC_DECODING_INFO_HANDLER_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_PEERCONNECTION_WEBRTC_DECODING_INFO_HANDLER_H_
#include <memory>
#include <optional>
#include "base/functional/callback_forward.h"
#include "third_party/blink/renderer/platform/peerconnection/audio_codec_factory.h"
#include "third_party/blink/renderer/platform/peerconnection/video_codec_factory.h"
#include "third_party/blink/renderer/platform/platform_export.h"
#include "third_party/blink/renderer/platform/wtf/hash_set.h"
#include "third_party/blink/renderer/platform/wtf/text/string_hash.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
namespace blink {
class PLATFORM_EXPORT WebrtcDecodingInfoHandler {
public:
static WebrtcDecodingInfoHandler* Instance();
WebrtcDecodingInfoHandler();
// Constructor for unittest to inject video and audio decoder factory
// instances.
WebrtcDecodingInfoHandler(
std::unique_ptr<webrtc::VideoDecoderFactory> video_decoder_factory,
webrtc::scoped_refptr<webrtc::AudioDecoderFactory> audio_decoder_factory);
// Not copyable or movable.
WebrtcDecodingInfoHandler(const WebrtcDecodingInfoHandler&) = delete;
WebrtcDecodingInfoHandler& operator=(const WebrtcDecodingInfoHandler&) =
delete;
~WebrtcDecodingInfoHandler();
// Queries the capabilities of the given decoding configuration and passes
// the result via callbacks.
// It implements WICG Media Capabilities decodingInfo() call for webrtc
// encoding.
// https://wicg.github.io/media-capabilities/#media-capabilities-interface
using OnMediaCapabilitiesDecodingInfoCallback =
base::OnceCallback<void(bool, bool)>;
void DecodingInfo(
const std::optional<webrtc::SdpAudioFormat> sdp_audio_format,
const std::optional<webrtc::SdpVideoFormat> sdp_video_format,
const bool video_spatial_scalability,
OnMediaCapabilitiesDecodingInfoCallback callback) const;
private:
std::unique_ptr<webrtc::VideoDecoderFactory> video_decoder_factory_;
webrtc::scoped_refptr<webrtc::AudioDecoderFactory> audio_decoder_factory_;
// List of supported audio codecs.
HashSet<String> supported_audio_codecs_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_PEERCONNECTION_WEBRTC_DECODING_INFO_HANDLER_H_
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