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/**********************************************************************
Audacity: A Digital Audio Editor
FFmpegLogImpl.inl
Dmitry Vedenko
**********************************************************************/
//! It is assumed that the lifetime of this is between loading and unloading
//! of ffmpeg libraries.
class FFmpegLogImpl : public FFmpegLog
{
public:
using Callback = void (*)(void*, int, const char*, va_list);
using CallbackSetter = void (*)(Callback);
explicit FFmpegLogImpl(
CallbackSetter av_log_set_callback, Callback oldCallback)
: mCallbackSetter{ av_log_set_callback }
, mOldCallback{ oldCallback }
{
if (mCallbackSetter)
mCallbackSetter(LogCallback);
}
~FFmpegLogImpl() override
{
if (mCallbackSetter)
mCallbackSetter(mOldCallback);
}
private:
static void LogCallback(void* ptr, int level, const char* fmt, va_list vl)
{
if (level > AV_LOG_INFO)
return;
wxString message;
if (ptr != nullptr)
{
AVClass* cls = *static_cast<AVClass**>(ptr);
message = wxString::Format(
wxT("[%s @ %p] "),
wxString::FromUTF8(cls->item_name(ptr)),
ptr
);
}
message += wxString::FormatV(wxString::FromUTF8(fmt), vl);
wxString cpt;
switch (level)
{
case 0:
cpt = wxT("Error");
wxLogError(message);
break;
case 1:
cpt = wxT("Info");
wxLogInfo(message);
break;
case 2:
cpt = wxT("Debug");
wxLogInfo(message);
break;
default:
cpt = wxT("Log");
wxLogInfo(message);
break;
}
wxLogDebug(wxT("%s: %s"), cpt, message);
}
CallbackSetter mCallbackSetter;
Callback mOldCallback;
};
std::unique_ptr<FFmpegLog> CreateLogCallbackSetter(const FFmpegFunctions& ffmpeg)
{
return std::make_unique<FFmpegLogImpl>(
ffmpeg.av_log_set_callback, ffmpeg.av_log_default_callback);
}
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