accel.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 "libav_deps.h"
#include "media_codec.h"
 
#include <memory>
#include <string>
#include <vector>
#include <list>
 
extern "C" {
#include <libavutil/hwcontext.h>
}
 
namespace jami {
namespace video {
 
 
enum class DeviceState {
    NOT_TESTED,
    USABLE,
    NOT_USABLE
};
 
class HardwareAccel
{
public:
    static std::unique_ptr<VideoFrame> transferToMainMemory(const VideoFrame& frame,
                                                            AVPixelFormat desiredFormat);
 
    HardwareAccel(AVCodecID id,
                  const std::string& name,
                  AVHWDeviceType hwType,
                  AVPixelFormat format,
                  AVPixelFormat swFormat,
                  CodecType type,
                  bool dynBitrate);
 
    ~HardwareAccel();
 
    AVCodecID getCodecId() const { return id_; };
 
    const std::string& getName() const { return name_; };
 
    AVPixelFormat getFormat() const { return format_; };
 
    AVPixelFormat getSoftwareFormat() const { return swFormat_; }
 
    std::string getCodecName() const;
 
    bool isLinked() const { return linked_; }
 
    void setDetails(AVCodecContext* codecCtx);
 
    std::unique_ptr<VideoFrame> transfer(const VideoFrame& frame);
 
    bool linkHardware(AVBufferRef* framesCtx);
 
    static std::list<HardwareAccel> getCompatibleAccel(AVCodecID id,
                                                       int width,
                                                       int height,
                                                       CodecType type);
    int initAPI(bool linkable, AVBufferRef* framesCtx);
    bool dynBitrate() { return dynBitrate_; }
 
private:
    bool initDevice(const std::string& device);
    bool initFrame();
 
    AVCodecID id_ {AV_CODEC_ID_NONE};
    std::string name_;
    AVHWDeviceType hwType_ {AV_HWDEVICE_TYPE_NONE};
    AVPixelFormat format_ {AV_PIX_FMT_NONE};
    AVPixelFormat swFormat_ {AV_PIX_FMT_NONE};
    CodecType type_ {CODEC_NONE};
    bool linked_ {false};
    int width_ {0};
    int height_ {0};
    bool dynBitrate_ {false};
 
    AVBufferRef* deviceCtx_ {nullptr};
    AVBufferRef* framesCtx_ {nullptr};
 
    int init_device(const char* name, const char* device, int flags);
    int init_device_type(std::string& dev);
 
    std::list<std::pair<std::string, DeviceState>>* possible_devices_;
};
 
} // namespace video
} // namespace jami