void VideoFrameTransform::transformInputPos()

in Transform360/Library/VideoFrameTransform.cpp [903:933]

• 28 lines of code
• 4 McCabe index (conditional complexity)

void VideoFrameTransform::transformInputPos(
    float tx,
    float ty,
    float tz,
    float inputPixelWidth,
    float* outX,
    float* outY) {
  switch (ctx_.input_layout) {
    case LAYOUT_CUBEMAP_32:
    {
      float d = sqrtf(tx * tx + ty * ty + tz * tz);
      transformCubeFacePos(tx / d, ty / d, tz / d, outX, outY);
      break;
    }
    default:
    {
      // Assumming equirect
      float d = sqrtf(tx * tx + ty * ty + tz * tz);

      *outX = -atan2f (-tx / d, tz / d) / (M_PI * 2.0f) + 0.5f;
      if (ctx_.output_layout == LAYOUT_BARREL ||
          ctx_.output_layout == LAYOUT_BARREL_SPLIT) {
        // Clamp pixels on the right, since we might have padding from ffmpeg.
        *outX = std::min(*outX, 1.0f - inputPixelWidth * 0.5f);
        *outX = std::max(*outX, inputPixelWidth * 0.5f);
      }
      *outY = asinf (-ty / d) / M_PI + 0.5f;
      break;
    }
  }
}