Change sign in ff_celp_lp_synthesis_filterf(). This makes this function useful for AMR and RA144.

Patch by Kenan Gillet Originally committed as revision 17546 to svn://svn.ffmpeg.org/ffmpeg/trunk

Kenan Gillet committed 17 years ago

Commit cacb8211 parent 40284e92 files · +2 −2Browse files

Unified · Split

2 files

libavcodec/celp_filters.c +1 −1
libavcodec/qcelp_lsp.c +1 −1

libavcodec/celp_filters.c+1−1

@@ -102,6 +102,6 @@ void ff_celp_lp_synthesis_filterf( · 101 unmodified lines
102	{	102	{
103	out[n] = in[n];	103	out[n] = in[n];
104	for(i=1; i<filter_length; i++)	104	for(i=1; i<filter_length; i++)
105	out[n] += filter_coeffs[i] * out[n-i];	105	out[n] -= filter_coeffs[i] * out[n-i];
106	}	106	}
107	}	107	}

libavcodec/qcelp_lsp.c+1−1

@@ -81,7 +81,7 @@ void ff_qcelp_lspf2lpc(const float lspf, float lpc) · 80 unmodified lines
81	{	81	{
82	double pa[6], qa[6];	82	double pa[6], qa[6];
83	int i;	83	int i;
84	double bandwith_expansion_coeff = -QCELP_BANDWITH_EXPANSION_COEFF * 0.5;	84	double bandwith_expansion_coeff = QCELP_BANDWITH_EXPANSION_COEFF * 0.5;
85		85
86	lsp2polyf(lspf, pa, 5);	86	lsp2polyf(lspf, pa, 5);
87	lsp2polyf(lspf + 1, qa, 5);	87	lsp2polyf(lspf + 1, qa, 5);