Line data    Source code

       1             : /*
       2             :  *  Copyright (C) 2004-2024 Savoir-faire Linux Inc.
       3             :  *
       4             :  *  This program is free software: you can redistribute it and/or modify
       5             :  *  it under the terms of the GNU General Public License as published by
       6             :  *  the Free Software Foundation, either version 3 of the License, or
       7             :  *  (at your option) any later version.
       8             :  *
       9             :  *  This program is distributed in the hope that it will be useful,
      10             :  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
      11             :  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
      12             :  *  GNU General Public License for more details.
      13             :  *
      14             :  *  You should have received a copy of the GNU General Public License
      15             :  *  along with this program. If not, see <https://www.gnu.org/licenses/>.
      16             :  */
      17             : 
      18             : #include "filter_transpose.h"
      19             : #include "logger.h"
      20             : 
      21             : namespace jami {
      22             : namespace video {
      23             : 
      24             : std::unique_ptr<MediaFilter>
      25           0 : getTransposeFilter(
      26             :     int rotation, std::string inputName, int width, int height, int format, bool rescale)
      27             : {
      28           0 :     JAMI_WARN("Rotation set to %d", rotation);
      29           0 :     if (rotation == 0) {
      30           0 :         return {};
      31             :     }
      32             : 
      33           0 :     std::stringstream ss;
      34           0 :     ss << "[" << inputName << "] ";
      35             : 
      36           0 :     switch (rotation) {
      37           0 :     case 90:
      38             :     case -270:
      39           0 :         ss << "transpose=2";
      40           0 :         if (rescale) {
      41           0 :             if (width > height)
      42           0 :                 ss << ", scale=w=-1:h=" << height << ", pad=" << width << ":" << height
      43           0 :                    << ":(ow-iw)/2";
      44             :             else
      45           0 :                 ss << ", scale=w=" << width << ":h=-1"
      46           0 :                    << ", pad=" << width << ":" << height << ":0:(oh-ih)/2";
      47             :         }
      48           0 :         break;
      49           0 :     case 180:
      50             :     case -180:
      51           0 :         ss << "transpose=1, transpose=1";
      52           0 :         break;
      53           0 :     case 270:
      54             :     case -90:
      55           0 :         ss << "transpose=1";
      56           0 :         if (rescale) {
      57           0 :             if (width > height)
      58           0 :                 ss << ", scale=w=-1:h=" << height << ", pad=" << width << ":" << height
      59           0 :                    << ":(ow-iw)/2";
      60             :             else
      61           0 :                 ss << ", scale=w=" << width << ":h=-1"
      62           0 :                    << ", pad=" << width << ":" << height << ":0:(oh-ih)/2";
      63             :         }
      64           0 :         break;
      65           0 :     default:
      66           0 :         return {};
      67             :     }
      68             : 
      69           0 :     constexpr auto one = rational<int>(1);
      70           0 :     std::vector<MediaStream> msv;
      71           0 :     msv.emplace_back(inputName, format, one, width, height, 0, one);
      72             : 
      73           0 :     std::unique_ptr<MediaFilter> filter(new MediaFilter);
      74           0 :     auto ret = filter->initialize(ss.str(), msv);
      75           0 :     if (ret < 0) {
      76           0 :         JAMI_ERR() << "filter init fail";
      77           0 :         return {};
      78             :     }
      79           0 :     return filter;
      80           0 : }
      81             : 
      82             : } // namespace video
      83             : } // namespace jami