video_sender.h

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/*
 *  Copyright (C) 2004-2025 Savoir-faire Linux Inc.
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program. If not, see <https://www.gnu.org/licenses/>.
 */
#pragma once
 
#include "noncopyable.h"
#include "media_encoder.h"
#include "media_io_handle.h"
 
#include <map>
#include <string>
#include <memory>
#include <atomic>
 
// Forward declarations
namespace jami {
class SocketPair;
struct DeviceParams;
} // namespace jami
 
namespace jami {
namespace video {
 
class VideoSender : public VideoFramePassiveReader
{
public:
    VideoSender(const std::string& dest,
                const MediaStream& opts,
                const MediaDescription& args,
                SocketPair& socketPair,
                const uint16_t seqVal,
                uint16_t mtu,
                bool allowHwAccel = true);
 
    ~VideoSender() {};
 
    void forceKeyFrame();
 
    // as VideoFramePassiveReader
    void update(Observable<std::shared_ptr<MediaFrame>>* obs,
                const std::shared_ptr<MediaFrame>& frame_p) override;
 
    uint16_t getLastSeqValue();
 
    void setChangeOrientationCallback(std::function<void(int)> cb);
    int setBitrate(uint64_t br);
 
private:
    static constexpr int KEYFRAMES_AT_START {1}; // Number of keyframes to enforce at stream startup
    static constexpr unsigned KEY_FRAME_PERIOD {0}; // seconds before forcing a keyframe
 
    NON_COPYABLE(VideoSender);
 
    void encodeAndSendVideo(const std::shared_ptr<VideoFrame>&);
 
    // encoder MUST be deleted before muxContext
    std::unique_ptr<MediaIOHandle> muxContext_ = nullptr;
    std::unique_ptr<MediaEncoder> videoEncoder_ = nullptr;
 
    std::atomic<int> forceKeyFrame_ {KEYFRAMES_AT_START};
    int keyFrameFreq_ {0}; // Set keyframe rate, 0 to disable auto-keyframe. Computed in constructor
    int64_t frameNumber_ = 0;
 
    int rotation_ = -1;
    std::function<void(int)> changeOrientationCallback_;
};
} // namespace video
} // namespace jami