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#include "screenshot-helper.hpp"
#include "advanced-scene-switcher.hpp"
#include <chrono>
namespace advss {
Screenshot::Screenshot(obs_source_t *source, const QRect &subarea,
bool blocking, int timeout, bool saveToFile,
std::string path)
: _weakSource(OBSGetWeakRef(source)),
_subarea(subarea),
_blocking(blocking),
_saveToFile(saveToFile),
_path(path)
{
std::unique_lock<std::mutex> lock(_mutex);
_initDone = true;
obs_add_tick_callback(ScreenshotTick, this);
if (_blocking) {
auto res =
_cv.wait_for(lock, std::chrono::milliseconds(timeout));
if (res == std::cv_status::timeout) {
if (source) {
blog(LOG_WARNING,
"Failed to get screenshot in time for source %s",
obs_source_get_name(source));
} else {
blog(LOG_WARNING,
"Failed to get screenshot in time");
}
}
}
}
Screenshot::~Screenshot()
{
if (_initDone) {
obs_enter_graphics();
gs_stagesurface_destroy(_stagesurf);
gs_texrender_destroy(_texrender);
obs_leave_graphics();
}
obs_remove_tick_callback(ScreenshotTick, this);
if (_saveThread.joinable()) {
_saveThread.join();
}
}
void Screenshot::CreateScreenshot()
{
OBSSource source = OBSGetStrongRef(_weakSource);
if (source) {
_cx = obs_source_get_base_width(source);
_cy = obs_source_get_base_height(source);
} else {
obs_video_info ovi;
obs_get_video_info(&ovi);
_cx = ovi.base_width;
_cy = ovi.base_height;
}
QRect renderArea(0, 0, _cx, _cy);
if (!_subarea.isEmpty()) {
renderArea &= _subarea;
}
if (renderArea.isEmpty()) {
vblog(LOG_WARNING,
"Cannot screenshot \"%s\", invalid target size",
obs_source_get_name(source));
obs_remove_tick_callback(ScreenshotTick, this);
_done = true;
return;
}
_cx = renderArea.width();
_cy = renderArea.height();
_texrender = gs_texrender_create(GS_RGBA, GS_ZS_NONE);
_stagesurf = gs_stagesurface_create(renderArea.width(),
renderArea.height(), GS_RGBA);
gs_texrender_reset(_texrender);
if (gs_texrender_begin(_texrender, renderArea.width(),
renderArea.height())) {
vec4 zero;
vec4_zero(&zero);
gs_clear(GS_CLEAR_COLOR, &zero, 0.0f, 0);
gs_ortho((float)(renderArea.left()),
(float)(renderArea.right() + 1),
(float)(renderArea.top()),
(float)(renderArea.bottom() + 1), -100.0f, 100.0f);
gs_blend_state_push();
gs_blend_function(GS_BLEND_ONE, GS_BLEND_ZERO);
if (source) {
obs_source_inc_showing(source);
obs_source_video_render(source);
obs_source_dec_showing(source);
} else {
obs_render_main_texture();
}
gs_blend_state_pop();
gs_texrender_end(_texrender);
}
}
void Screenshot::Download()
{
gs_stage_texture(_stagesurf, gs_texrender_get_texture(_texrender));
}
void Screenshot::Copy()
{
uint8_t *videoData = nullptr;
uint32_t videoLinesize = 0;
_image = QImage(_cx, _cy, QImage::Format::Format_RGBA8888);
if (gs_stagesurface_map(_stagesurf, &videoData, &videoLinesize)) {
int linesize = _image.bytesPerLine();
for (int y = 0; y < (int)_cy; y++)
memcpy(_image.scanLine(y),
videoData + (y * videoLinesize), linesize);
gs_stagesurface_unmap(_stagesurf);
}
}
void Screenshot::MarkDone()
{
_time = std::chrono::high_resolution_clock::now();
_done = true;
std::unique_lock<std::mutex> lock(_mutex);
_cv.notify_all();
}
void Screenshot::WriteToFile()
{
if (!_saveToFile) {
return;
}
_saveThread = std::thread([this]() {
if (_image.save(QString::fromStdString(_path))) {
vblog(LOG_INFO, "Wrote screenshot to \"%s\"",
_path.c_str());
} else {
blog(LOG_WARNING,
"Failed to save screenshot to \"%s\"!\nMaybe unknown format?",
_path.c_str());
}
});
}
#define STAGE_SCREENSHOT 0
#define STAGE_DOWNLOAD 1
#define STAGE_COPY_AND_SAVE 2
#define STAGE_FINISH 3
void Screenshot::ScreenshotTick(void *param, float)
{
Screenshot *data = reinterpret_cast<Screenshot *>(param);
if (data->_stage == STAGE_FINISH) {
return;
}
obs_enter_graphics();
switch (data->_stage) {
case STAGE_SCREENSHOT:
data->CreateScreenshot();
break;
case STAGE_DOWNLOAD:
data->Download();
break;
case STAGE_COPY_AND_SAVE:
data->Copy();
data->WriteToFile();
data->MarkDone();
obs_remove_tick_callback(ScreenshotTick, data);
break;
}
obs_leave_graphics();
data->_stage++;
}
} // namespace advss
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