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Allow changing Tesseract model directory

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This will prevent custom models being deleted when installing a new
version of the plugin, as the plugin's data directory might get wiped on
some operating systems.
This commit is contained in:
warmuptill
2025-05-12 13:21:33 +02:00
committed by WarmUpTill
parent 27aed79305
commit cdc5d16e95
5 changed files with 102 additions and 14 deletions
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53
plugins/video/parameter-wrappers.cpp
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@@ -252,6 +252,7 @@ OCRParameters::OCRParameters(const OCRParameters &other)
color(other.color),
colorThreshold(other.colorThreshold),
pageSegMode(other.pageSegMode),
tesseractBasePath(other.tesseractBasePath),
languageCode(other.languageCode)
{
if (!initDone) {
@@ -269,6 +270,7 @@ OCRParameters &OCRParameters::operator=(const OCRParameters &other)
color = other.color;
colorThreshold = other.colorThreshold;
pageSegMode = other.pageSegMode;
tesseractBasePath = other.tesseractBasePath;
languageCode = other.languageCode;
if (!initDone) {
Setup();
@@ -284,11 +286,12 @@ bool OCRParameters::Save(obs_data_t *obj) const
auto data = obs_data_create();
text.Save(data, "pattern");
regex.Save(data);
tesseractBasePath.Save(data, "tesseractBasePath");
languageCode.Save(data, "language");
SaveColor(data, "textColor", color);
colorThreshold.Save(data, "colorThreshold");
obs_data_set_int(data, "pageSegMode", static_cast<int>(pageSegMode));
obs_data_set_int(data, "version", 1);
obs_data_set_int(data, "version", 2);
obs_data_set_obj(obj, "ocrData", data);
obs_data_release(data);
return true;
@@ -301,6 +304,14 @@ bool OCRParameters::Load(obs_data_t *obj)
regex.Load(data);
obs_data_set_default_string(data, "language", "eng");
languageCode.Load(data, "language");
tesseractBasePath.Load(data, "tesseractBasePath");
if (!obs_data_has_user_value(data, "version") ||
obs_data_get_int(data, "version") < 2) {
tesseractBasePath = std::string(obs_get_module_data_path(
obs_current_module())) +
"/res/ocr/";
}
color = LoadColor(data, "textColor");
if (obs_data_has_user_value(data, "version")) {
colorThreshold.Load(data, "colorThreshold");
@@ -324,10 +335,8 @@ void OCRParameters::SetPageMode(tesseract::PageSegMode mode)
bool OCRParameters::SetLanguageCode(const std::string &value)
{
const auto dataPath =
QString(obs_get_module_data_path(obs_current_module())) +
QString("/res/ocr") + "/" + QString::fromStdString(value) +
".traineddata";
const auto dataPath = QString::fromStdString(tesseractBasePath) + "/" +
QString::fromStdString(value) + ".traineddata";
QFileInfo fileInfo(dataPath);
if (!fileInfo.exists(dataPath)) {
return false;
@@ -343,6 +352,26 @@ std::string OCRParameters::GetLanguageCode() const
return languageCode;
}
bool OCRParameters::SetTesseractBasePath(const std::string &value)
{
const auto dataPath = QString::fromStdString(value) + "/" +
QString::fromStdString(languageCode) +
".traineddata";
QFileInfo fileInfo(dataPath);
if (!fileInfo.exists(dataPath)) {
return false;
}
tesseractBasePath = value;
Setup();
ocr->SetPageSegMode(pageSegMode);
return true;
}
std::string OCRParameters::GetTesseractBasePath() const
{
return tesseractBasePath;
}
void OCRParameters::Setup()
{
ocr = std::make_unique<tesseract::TessBaseAPI>();
@@ -350,8 +379,18 @@ void OCRParameters::Setup()
initDone = false;
return;
}
std::string dataPath = obs_get_module_data_path(obs_current_module()) +
std::string("/res/ocr");
const std::string dataPath = std::string(tesseractBasePath) + "/";
const std::string modelFile =
std::string(languageCode) + ".traineddata";
const auto fullPath = QString::fromStdString(dataPath) +
QString::fromStdString(modelFile);
QFileInfo fileInfo(fullPath);
if (!fileInfo.exists(fullPath)) {
initDone = false;
return;
}
if (ocr->Init(dataPath.c_str(), languageCode.c_str()) != 0) {
initDone = false;
return;