check for invalid fade values (trying to track down AL_CHECK in vsrc_latch, called from snd_fade, which is most likely due to invalid gain)
This was SVN commit r5171.
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@ -1433,6 +1433,9 @@ static FadeRet fade(FadeInfo& fi, double cur_time, float& out_val)
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if(fi.type == FT_NONE)
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return FADE_NO_CHANGE;
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debug_assert(0.0f <= fi.initial_val && fi.initial_val <= 1.0f);
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debug_assert(0.0f <= fi.final_val && fi.final_val <= 1.0f);
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// end reached - if fi.length is 0, but the fade is "in progress", do the
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// processing here, and skip the dangerous division
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if(fi.type == FT_ABORT || (cur_time >= fi.start_time + fi.length))
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@ -1453,6 +1456,7 @@ static FadeRet fade(FadeInfo& fi, double cur_time, float& out_val)
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// how far into the fade are we? [0,1]
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const float t = (cur_time - fi.start_time) / fi.length;
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debug_assert(0.0f <= t && t <= 1.0f);
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float factor;
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switch(fi.type)
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