generic-library/webrtc
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Optimized WebRtcIsacfix_NormLatticeFilterMa() function for iSAC fix for ARM Neon

Browse Source 
architecture with intrinsics and assembly code. The total iSAC codec speech improved
about 3~5%.

Notes
(1) The Neon version after this optimization is not bit-exact with the generic
C version. The out quality, however, is not worse as verified by test vectors ouput,
and undertandably in theory (32bit x 32bit in Neon is more accurate than the approximation
C code in the generic version).
(2) In Android, a isac neon library will be built. Along with some new function structures,
it is partly for preparation of introducing a run time detection of Neon architecture soon.
Review URL: http://webrtc-codereview.appspot.com/268016

git-svn-id: http://webrtc.googlecode.com/svn/trunk@1192 4adac7df-926f-26a2-2b94-8c16560cd09d
This commit is contained in:
kma@webrtc.org
2011-12-14 18:59:43 +00:00
parent 02afbeaca5
commit f0a964dc0a
8 changed files with 329 additions and 61 deletions
Download Patch File Download Diff File Expand all files Collapse all files

55
src/modules/audio_coding/codecs/iSAC/fix/source/codec.h
View File

@@ -122,7 +122,6 @@ void WebRtcIsacfix_NormLatticeFilterMa(WebRtc_Word16 orderCoef,
WebRtc_Word16 lo_hi,
WebRtc_Word16 *lat_outQ9);
void WebRtcIsacfix_NormLatticeFilterAr(WebRtc_Word16 orderCoef,
WebRtc_Word16 *stateGQ0,
WebRtc_Word32 *lat_inQ25,
@@ -131,10 +130,54 @@ void WebRtcIsacfix_NormLatticeFilterAr(WebRtc_Word16 orderCoef,
WebRtc_Word16 lo_hi,
WebRtc_Word16 *lat_outQ0);
int WebRtcIsacfix_AutocorrFix(WebRtc_Word32* __restrict r,
const WebRtc_Word16* __restrict x,
WebRtc_Word16 N,
WebRtc_Word16 order,
WebRtc_Word16* __restrict scale);
int WebRtcIsacfix_AutocorrC(WebRtc_Word32* __restrict r,
const WebRtc_Word16* __restrict x,
WebRtc_Word16 N,
WebRtc_Word16 order,
WebRtc_Word16* __restrict scale);
void WebRtcIsacfix_FilterMaLoopC(int16_t input0,
int16_t input1,
int32_t input2,
int32_t* ptr0,
int32_t* ptr1,
int32_t* ptr2);
// Functions for ARM-Neon platforms, in place of the above two generic C ones.
#if (defined(WEBRTC_ANDROID) && defined(WEBRTC_ARCH_ARM_NEON))
int WebRtcIsacfix_AutocorrNeon(WebRtc_Word32* __restrict r,
const WebRtc_Word16* __restrict x,
WebRtc_Word16 N,
WebRtc_Word16 order,
WebRtc_Word16* __restrict scale);
void WebRtcIsacfix_FilterMaLoopNeon(int16_t input0,
int16_t input1,
int32_t input2,
int32_t* ptr0,
int32_t* ptr1,
int32_t* ptr2);
#endif
/**** Function pointers associated with
**** WebRtcIsacfix_AutocorrC() / WebRtcIsacfix_AutocorrNeon()
**** and WebRtcIsacfix_FilterMaLoopC() / WebRtcIsacfix_FilterMaLoopNeon().
****/
typedef int (*AutocorrFix)(WebRtc_Word32* __restrict__ r,
const WebRtc_Word16* __restrict__ x,
WebRtc_Word16 N,
WebRtc_Word16 order,
WebRtc_Word16* __restrict__ scale);
extern AutocorrFix WebRtcIsacfix_AutocorrFix;
typedef void (*FilterMaLoopFix)(int16_t input0,
int16_t input1,
int32_t input2,
int32_t* ptr0,
int32_t* ptr1,
int32_t* ptr2);
extern FilterMaLoopFix WebRtcIsacfix_FilterMaLoopFix;
#endif /* WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_FIX_SOURCE_CODEC_H_ */