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Fix possibly harmful outbound addressing. Patch by Kenan Gillet.
Originally committed as revision 18528 to svn://svn.ffmpeg.org/ffmpeg/trunk
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@ -61,15 +61,14 @@ int ff_celp_lp_synthesis_filter(
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{
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int i,n;
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// These two lines are to avoid a -1 subtraction in the main loop
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// This line is to avoid a +1 subtraction in the main loop.
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filter_length++;
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filter_coeffs--;
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for(n=0; n<buffer_length; n++)
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{
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int sum = rounder;
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for(i=1; i<filter_length; i++)
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sum -= filter_coeffs[i] * out[n-i];
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sum -= filter_coeffs[i-1] * out[n-i];
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sum = (sum >> 12) + in[n];
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@ -94,14 +93,13 @@ void ff_celp_lp_synthesis_filterf(
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{
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int i,n;
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// These two lines are to avoid a -1 subtraction in the main loop
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// This line is to avoid a +1 subtraction in the main loop
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filter_length++;
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filter_coeffs--;
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for(n=0; n<buffer_length; n++)
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{
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out[n] = in[n];
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for(i=1; i<filter_length; i++)
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out[n] -= filter_coeffs[i] * out[n-i];
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out[n] -= filter_coeffs[i-1] * out[n-i];
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}
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}
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