diff options
Diffstat (limited to 'silk/LPC_analysis_filter.c')
| -rw-r--r-- | silk/LPC_analysis_filter.c | 27 |
1 files changed, 24 insertions, 3 deletions
diff --git a/silk/LPC_analysis_filter.c b/silk/LPC_analysis_filter.c index 421dba0..9d1f16c 100644 --- a/silk/LPC_analysis_filter.c +++ b/silk/LPC_analysis_filter.c @@ -8,11 +8,11 @@ this list of conditions and the following disclaimer. - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. -- Neither the name of Internet Society, IETF or IETF Trust, nor the +- Neither the name of Internet Society, IETF or IETF Trust, nor the names of specific contributors, may be used to endorse or promote products derived from this software without specific prior written permission. -THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS “AS IS” +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE @@ -30,6 +30,7 @@ POSSIBILITY OF SUCH DAMAGE. #endif #include "SigProc_FIX.h" +#include "celt_lpc.h" /*******************************************/ /* LPC analysis filter */ @@ -46,14 +47,33 @@ void silk_LPC_analysis_filter( const opus_int32 d /* I Filter order */ ) { - opus_int ix, j; + opus_int j; +#ifdef FIXED_POINT + opus_int16 mem[SILK_MAX_ORDER_LPC]; + opus_int16 num[SILK_MAX_ORDER_LPC]; +#else + int ix; opus_int32 out32_Q12, out32; const opus_int16 *in_ptr; +#endif silk_assert( d >= 6 ); silk_assert( (d & 1) == 0 ); silk_assert( d <= len ); +#ifdef FIXED_POINT + silk_assert( d <= SILK_MAX_ORDER_LPC ); + for ( j = 0; j < d; j++ ) { + num[ j ] = -B[ j ]; + } + for (j=0;j<d;j++) { + mem[ j ] = in[ d - j - 1 ]; + } + celt_fir( in + d, num, out + d, len - d, d, mem ); + for ( j = 0; j < d; j++ ) { + out[ j ] = 0; + } +#else for( ix = d; ix < len; ix++ ) { in_ptr = &in[ ix - 1 ]; @@ -82,4 +102,5 @@ void silk_LPC_analysis_filter( /* Set first d output samples to zero */ silk_memset( out, 0, d * sizeof( opus_int16 ) ); +#endif } |