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For Android ARMv7 platforms, added a feature of dynamically detecting the existence of Neon,

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and when it's present, switch to some functions optimized for Neon at run time.
Review URL: http://webrtc-codereview.appspot.com/268002

git-svn-id: http://webrtc.googlecode.com/svn/trunk@1096 4adac7df-926f-26a2-2b94-8c16560cd09d
This commit is contained in:
kma@webrtc.org 2011-12-03 18:34:50 +00:00
parent ae7017d588
commit b59c031660
13 changed files with 1274 additions and 796 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
Android.mk
View File

@ -54,6 +54,7 @@ include $(MY_WEBRTC_ROOT_PATH)/libvpx.mk
LOCAL_PATH := $(call my-dir) LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS) include $(CLEAR_VARS)
include $(LOCAL_PATH)/../../external/webrtc/android-webrtc.mk
LOCAL_ARM_MODE := arm LOCAL_ARM_MODE := arm
LOCAL_MODULE := libwebrtc_audio_preprocessing LOCAL_MODULE := libwebrtc_audio_preprocessing
@ -71,6 +72,17 @@ LOCAL_WHOLE_STATIC_LIBRARIES := \
libwebrtc_aecm \ libwebrtc_aecm \
libwebrtc_system_wrappers libwebrtc_system_wrappers
# Add Neon libraries.
ifneq (,$(filter '-DWEBRTC_DETECT_ARM_NEON',$(MY_WEBRTC_COMMON_DEFS)))
LOCAL_WHOLE_STATIC_LIBRARIES += \
libwebrtc_aecm_neon \
libwebrtc_ns_neon
else ifeq ($(ARCH_ARM_HAVE_NEON),true)
LOCAL_WHOLE_STATIC_LIBRARIES += \
libwebrtc_aecm_neon \
libwebrtc_ns_neon
endif
LOCAL_STATIC_LIBRARIES := \ LOCAL_STATIC_LIBRARIES := \
libprotobuf-cpp-2.3.0-lite libprotobuf-cpp-2.3.0-lite

3
android-webrtc.mk
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@ -21,8 +21,9 @@ MY_WEBRTC_COMMON_DEFS := \
# '-DWEBRTC_MODULE_UTILITY_VIDEO' [module media_file] [module utility] # '-DWEBRTC_MODULE_UTILITY_VIDEO' [module media_file] [module utility]
ifeq ($(TARGET_ARCH),arm) ifeq ($(TARGET_ARCH),arm)
MY_WEBRTC_COMMON_DEFS += \ MY_WEBRTC_COMMON_DEFS += \
'-DWEBRTC_ARM_INLINE_CALLS' \
'-DWEBRTC_ARCH_ARM' '-DWEBRTC_ARCH_ARM'
# '-DWEBRTC_DETECT_ARM_NEON' # only used in a build configuration without Neon
# TODO(kma): figure out if the above define could be moved to NDK build only.
# TODO(kma): test if the code under next two macros works with generic GCC compilers # TODO(kma): test if the code under next two macros works with generic GCC compilers
ifeq ($(ARCH_ARM_HAVE_NEON),true) ifeq ($(ARCH_ARM_HAVE_NEON),true)

46
src/modules/audio_processing/aecm/Android.mk
View File

@ -6,6 +6,9 @@
# in the file PATENTS. All contributing project authors may # in the file PATENTS. All contributing project authors may
# be found in the AUTHORS file in the root of the source tree. # be found in the AUTHORS file in the root of the source tree.
#############################
# Build the non-neon library.
LOCAL_PATH := $(call my-dir) LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS) include $(CLEAR_VARS)
@ -21,21 +24,16 @@ LOCAL_SRC_FILES := \
aecm_core.c aecm_core.c
# Flags passed to both C and C++ files. # Flags passed to both C and C++ files.
LOCAL_CFLAGS := \ LOCAL_CFLAGS := $(MY_WEBRTC_COMMON_DEFS)
$(MY_WEBRTC_COMMON_DEFS)
ifeq ($(ARCH_ARM_HAVE_NEON),true)
LOCAL_SRC_FILES += \
aecm_core_neon.c
LOCAL_CFLAGS += \
$(MY_ARM_CFLAGS_NEON)
endif
LOCAL_C_INCLUDES := \ LOCAL_C_INCLUDES := \
$(LOCAL_PATH)/interface \ $(LOCAL_PATH)/interface \
$(LOCAL_PATH)/../utility \ $(LOCAL_PATH)/../utility \
$(LOCAL_PATH)/../../.. \ $(LOCAL_PATH)/../../.. \
$(LOCAL_PATH)/../../../common_audio/signal_processing/include $(LOCAL_PATH)/../../../common_audio/signal_processing/include \
$(LOCAL_PATH)/../../../system_wrappers/interface
LOCAL_STATIC_LIBRARIES += libwebrtc_system_wrappers
LOCAL_SHARED_LIBRARIES := \ LOCAL_SHARED_LIBRARIES := \
libcutils \ libcutils \
@ -46,3 +44,31 @@ ifndef NDK_ROOT
include external/stlport/libstlport.mk include external/stlport/libstlport.mk
endif endif
include $(BUILD_STATIC_LIBRARY) include $(BUILD_STATIC_LIBRARY)
#########################
# Build the neon library.
include $(CLEAR_VARS)
LOCAL_ARM_MODE := arm
LOCAL_MODULE_CLASS := STATIC_LIBRARIES
LOCAL_MODULE := libwebrtc_aecm_neon
LOCAL_MODULE_TAGS := optional
LOCAL_SRC_FILES := aecm_core_neon.c
# Flags passed to both C and C++ files.
LOCAL_CFLAGS := \
$(MY_WEBRTC_COMMON_DEFS) \
-mfpu=neon \
-flax-vector-conversions
LOCAL_C_INCLUDES := \
$(LOCAL_PATH)/interface \
$(LOCAL_PATH)/../../.. \
$(LOCAL_PATH)/../../../common_audio/signal_processing/include
ifndef NDK_ROOT
include external/stlport/libstlport.mk
endif
include $(BUILD_STATIC_LIBRARY)

406
src/modules/audio_processing/aecm/aecm_core.c
View File

@ -13,8 +13,9 @@
#include <assert.h> #include <assert.h>
#include <stdlib.h> #include <stdlib.h>
#include "echo_control_mobile.h" #include "cpu_features_wrapper.h"
#include "delay_estimator_wrapper.h" #include "delay_estimator_wrapper.h"
#include "echo_control_mobile.h"
#include "ring_buffer.h" #include "ring_buffer.h"
#include "typedefs.h" #include "typedefs.h"
@ -263,6 +264,13 @@ static const uint16_t* AlignedFarend(AecmCore_t* self, int* far_q, int delay) {
HANDLE logFile = NULL; HANDLE logFile = NULL;
#endif #endif
// Declare function pointers.
CalcLinearEnergies WebRtcAecm_CalcLinearEnergies;
StoreAdaptiveChannel WebRtcAecm_StoreAdaptiveChannel;
ResetAdaptiveChannel WebRtcAecm_ResetAdaptiveChannel;
WindowAndFFT WebRtcAecm_WindowAndFFT;
InverseFFTAndWindow WebRtcAecm_InverseFFTAndWindow;
int WebRtcAecm_CreateCore(AecmCore_t **aecmInst) int WebRtcAecm_CreateCore(AecmCore_t **aecmInst)
{ {
AecmCore_t *aecm = malloc(sizeof(AecmCore_t)); AecmCore_t *aecm = malloc(sizeof(AecmCore_t));
@ -346,6 +354,194 @@ void WebRtcAecm_InitEchoPathCore(AecmCore_t* aecm, const WebRtc_Word16* echo_pat
aecm->mseChannelCount = 0; aecm->mseChannelCount = 0;
} }
static void WindowAndFFTC(WebRtc_Word16* fft,
const WebRtc_Word16* time_signal,
complex16_t* freq_signal,
int time_signal_scaling)
{
int i, j;
memset(fft, 0, sizeof(WebRtc_Word16) * PART_LEN4);
// FFT of signal
for (i = 0, j = 0; i < PART_LEN; i++, j += 2)
{
// Window time domain signal and insert into real part of
// transformation array |fft|
fft[j] = (WebRtc_Word16)WEBRTC_SPL_MUL_16_16_RSFT(
(time_signal[i] << time_signal_scaling),
WebRtcAecm_kSqrtHanning[i],
14);
fft[PART_LEN2 + j] = (WebRtc_Word16)WEBRTC_SPL_MUL_16_16_RSFT(
(time_signal[i + PART_LEN] << time_signal_scaling),
WebRtcAecm_kSqrtHanning[PART_LEN - i],
14);
// Inserting zeros in imaginary parts not necessary since we
// initialized the array with all zeros
}
WebRtcSpl_ComplexBitReverse(fft, PART_LEN_SHIFT);
WebRtcSpl_ComplexFFT(fft, PART_LEN_SHIFT, 1);
// Take only the first PART_LEN2 samples
for (i = 0, j = 0; j < PART_LEN2; i += 1, j += 2)
{
freq_signal[i].real = fft[j];
// The imaginary part has to switch sign
freq_signal[i].imag = - fft[j+1];
}
}
static void InverseFFTAndWindowC(AecmCore_t* aecm,
WebRtc_Word16* fft,
complex16_t* efw,
WebRtc_Word16* output,
const WebRtc_Word16* nearendClean)
{
int i, j, outCFFT;
WebRtc_Word32 tmp32no1;
// Synthesis
for (i = 1; i < PART_LEN; i++)
{
j = WEBRTC_SPL_LSHIFT_W32(i, 1);
fft[j] = efw[i].real;
// mirrored data, even
fft[PART_LEN4 - j] = efw[i].real;
fft[j + 1] = -efw[i].imag;
//mirrored data, odd
fft[PART_LEN4 - (j - 1)] = efw[i].imag;
}
fft[0] = efw[0].real;
fft[1] = -efw[0].imag;
fft[PART_LEN2] = efw[PART_LEN].real;
fft[PART_LEN2 + 1] = -efw[PART_LEN].imag;
// inverse FFT, result should be scaled with outCFFT
WebRtcSpl_ComplexBitReverse(fft, PART_LEN_SHIFT);
outCFFT = WebRtcSpl_ComplexIFFT(fft, PART_LEN_SHIFT, 1);
//take only the real values and scale with outCFFT
for (i = 0; i < PART_LEN2; i++)
{
j = WEBRTC_SPL_LSHIFT_W32(i, 1);
fft[i] = fft[j];
}
for (i = 0; i < PART_LEN; i++)
{
fft[i] = (WebRtc_Word16)WEBRTC_SPL_MUL_16_16_RSFT_WITH_ROUND(
fft[i],
WebRtcAecm_kSqrtHanning[i],
14);
tmp32no1 = WEBRTC_SPL_SHIFT_W32((WebRtc_Word32)fft[i],
outCFFT - aecm->dfaCleanQDomain);
fft[i] = (WebRtc_Word16)WEBRTC_SPL_SAT(WEBRTC_SPL_WORD16_MAX,
tmp32no1 + aecm->outBuf[i],
WEBRTC_SPL_WORD16_MIN);
output[i] = fft[i];
tmp32no1 = WEBRTC_SPL_MUL_16_16_RSFT(
fft[PART_LEN + i],
WebRtcAecm_kSqrtHanning[PART_LEN - i],
14);
tmp32no1 = WEBRTC_SPL_SHIFT_W32(tmp32no1,
outCFFT - aecm->dfaCleanQDomain);
aecm->outBuf[i] = (WebRtc_Word16)WEBRTC_SPL_SAT(
WEBRTC_SPL_WORD16_MAX,
tmp32no1,
WEBRTC_SPL_WORD16_MIN);
}
#ifdef ARM_WINM_LOG_
// measure tick end
QueryPerformanceCounter((LARGE_INTEGER*)&end);
diff__ = ((end - start) * 1000) / (freq/1000);
milliseconds = (unsigned int)(diff__ & 0xffffffff);
WriteFile (logFile, &milliseconds, sizeof(unsigned int), &temp, NULL);
#endif
// Copy the current block to the old position (aecm->outBuf is shifted elsewhere)
memcpy(aecm->xBuf, aecm->xBuf + PART_LEN, sizeof(WebRtc_Word16) * PART_LEN);
memcpy(aecm->dBufNoisy, aecm->dBufNoisy + PART_LEN, sizeof(WebRtc_Word16) * PART_LEN);
if (nearendClean != NULL)
{
memcpy(aecm->dBufClean, aecm->dBufClean + PART_LEN, sizeof(WebRtc_Word16) * PART_LEN);
}
}
static void CalcLinearEnergiesC(AecmCore_t* aecm,
const WebRtc_UWord16* far_spectrum,
WebRtc_Word32* echo_est,
WebRtc_UWord32* far_energy,
WebRtc_UWord32* echo_energy_adapt,
WebRtc_UWord32* echo_energy_stored)
{
int i;
// Get energy for the delayed far end signal and estimated
// echo using both stored and adapted channels.
for (i = 0; i < PART_LEN1; i++)
{
echo_est[i] = WEBRTC_SPL_MUL_16_U16(aecm->channelStored[i],
far_spectrum[i]);
(*far_energy) += (WebRtc_UWord32)(far_spectrum[i]);
(*echo_energy_adapt) += WEBRTC_SPL_UMUL_16_16(aecm->channelAdapt16[i],
far_spectrum[i]);
(*echo_energy_stored) += (WebRtc_UWord32)echo_est[i];
}
}
static void StoreAdaptiveChannelC(AecmCore_t* aecm,
const WebRtc_UWord16* far_spectrum,
WebRtc_Word32* echo_est)
{
int i;
// During startup we store the channel every block.
memcpy(aecm->channelStored, aecm->channelAdapt16, sizeof(WebRtc_Word16) * PART_LEN1);
// Recalculate echo estimate
for (i = 0; i < PART_LEN; i += 4)
{
echo_est[i] = WEBRTC_SPL_MUL_16_U16(aecm->channelStored[i],
far_spectrum[i]);
echo_est[i + 1] = WEBRTC_SPL_MUL_16_U16(aecm->channelStored[i + 1],
far_spectrum[i + 1]);
echo_est[i + 2] = WEBRTC_SPL_MUL_16_U16(aecm->channelStored[i + 2],
far_spectrum[i + 2]);
echo_est[i + 3] = WEBRTC_SPL_MUL_16_U16(aecm->channelStored[i + 3],
far_spectrum[i + 3]);
}
echo_est[i] = WEBRTC_SPL_MUL_16_U16(aecm->channelStored[i],
far_spectrum[i]);
}
static void ResetAdaptiveChannelC(AecmCore_t* aecm)
{
int i;
// The stored channel has a significantly lower MSE than the adaptive one for
// two consecutive calculations. Reset the adaptive channel.
memcpy(aecm->channelAdapt16, aecm->channelStored,
sizeof(WebRtc_Word16) * PART_LEN1);
// Restore the W32 channel
for (i = 0; i < PART_LEN; i += 4)
{
aecm->channelAdapt32[i] = WEBRTC_SPL_LSHIFT_W32(
(WebRtc_Word32)aecm->channelStored[i], 16);
aecm->channelAdapt32[i + 1] = WEBRTC_SPL_LSHIFT_W32(
(WebRtc_Word32)aecm->channelStored[i + 1], 16);
aecm->channelAdapt32[i + 2] = WEBRTC_SPL_LSHIFT_W32(
(WebRtc_Word32)aecm->channelStored[i + 2], 16);
aecm->channelAdapt32[i + 3] = WEBRTC_SPL_LSHIFT_W32(
(WebRtc_Word32)aecm->channelStored[i + 3], 16);
}
aecm->channelAdapt32[i] = WEBRTC_SPL_LSHIFT_W32((WebRtc_Word32)aecm->channelStored[i], 16);
}
// WebRtcAecm_InitCore(...) // WebRtcAecm_InitCore(...)
// //
// This function initializes the AECM instant created with WebRtcAecm_CreateCore(...) // This function initializes the AECM instant created with WebRtcAecm_CreateCore(...)
@ -463,6 +659,23 @@ int WebRtcAecm_InitCore(AecmCore_t * const aecm, int samplingFreq)
assert(PART_LEN % 16 == 0); assert(PART_LEN % 16 == 0);
// Initialize function pointers.
WebRtcAecm_WindowAndFFT = WindowAndFFTC;
WebRtcAecm_InverseFFTAndWindow = InverseFFTAndWindowC;
WebRtcAecm_CalcLinearEnergies = CalcLinearEnergiesC;
WebRtcAecm_StoreAdaptiveChannel = StoreAdaptiveChannelC;
WebRtcAecm_ResetAdaptiveChannel = ResetAdaptiveChannelC;
#ifdef WEBRTC_DETECT_ARM_NEON
uint64_t features = WebRtc_GetCPUFeaturesARM();
if ((features & kCPUFeatureNEON) != 0)
{
WebRtcAecm_InitNeon();
}
#elif defined(WEBRTC_ARCH_ARM_NEON)
WebRtcAecm_InitNeon();
#endif
return 0; return 0;
} }
@ -1890,194 +2103,3 @@ void WebRtcAecm_FetchFarFrame(AecmCore_t * const aecm, WebRtc_Word16 * const far
aecm->farBufReadPos += readLen; aecm->farBufReadPos += readLen;
} }
#if !(defined(WEBRTC_ANDROID) && defined(WEBRTC_ARCH_ARM_NEON))
void WebRtcAecm_WindowAndFFT(WebRtc_Word16* fft,
const WebRtc_Word16* time_signal,
complex16_t* freq_signal,
int time_signal_scaling)
{
int i, j;
memset(fft, 0, sizeof(WebRtc_Word16) * PART_LEN4);
// FFT of signal
for (i = 0, j = 0; i < PART_LEN; i++, j += 2)
{
// Window time domain signal and insert into real part of
// transformation array |fft|
fft[j] = (WebRtc_Word16)WEBRTC_SPL_MUL_16_16_RSFT(
(time_signal[i] << time_signal_scaling),
WebRtcAecm_kSqrtHanning[i],
14);
fft[PART_LEN2 + j] = (WebRtc_Word16)WEBRTC_SPL_MUL_16_16_RSFT(
(time_signal[i + PART_LEN] << time_signal_scaling),
WebRtcAecm_kSqrtHanning[PART_LEN - i],
14);
// Inserting zeros in imaginary parts not necessary since we
// initialized the array with all zeros
}
WebRtcSpl_ComplexBitReverse(fft, PART_LEN_SHIFT);
WebRtcSpl_ComplexFFT(fft, PART_LEN_SHIFT, 1);
// Take only the first PART_LEN2 samples
for (i = 0, j = 0; j < PART_LEN2; i += 1, j += 2)
{
freq_signal[i].real = fft[j];
// The imaginary part has to switch sign
freq_signal[i].imag = - fft[j+1];
}
}
void WebRtcAecm_InverseFFTAndWindow(AecmCore_t* aecm,
WebRtc_Word16* fft,
complex16_t* efw,
WebRtc_Word16* output,
const WebRtc_Word16* nearendClean)
{
int i, j, outCFFT;
WebRtc_Word32 tmp32no1;
// Synthesis
for (i = 1; i < PART_LEN; i++)
{
j = WEBRTC_SPL_LSHIFT_W32(i, 1);
fft[j] = efw[i].real;
// mirrored data, even
fft[PART_LEN4 - j] = efw[i].real;
fft[j + 1] = -efw[i].imag;
//mirrored data, odd
fft[PART_LEN4 - (j - 1)] = efw[i].imag;
}
fft[0] = efw[0].real;
fft[1] = -efw[0].imag;
fft[PART_LEN2] = efw[PART_LEN].real;
fft[PART_LEN2 + 1] = -efw[PART_LEN].imag;
// inverse FFT, result should be scaled with outCFFT
WebRtcSpl_ComplexBitReverse(fft, PART_LEN_SHIFT);
outCFFT = WebRtcSpl_ComplexIFFT(fft, PART_LEN_SHIFT, 1);
//take only the real values and scale with outCFFT
for (i = 0; i < PART_LEN2; i++)
{
j = WEBRTC_SPL_LSHIFT_W32(i, 1);
fft[i] = fft[j];
}
for (i = 0; i < PART_LEN; i++)
{
fft[i] = (WebRtc_Word16)WEBRTC_SPL_MUL_16_16_RSFT_WITH_ROUND(
fft[i],
WebRtcAecm_kSqrtHanning[i],
14);
tmp32no1 = WEBRTC_SPL_SHIFT_W32((WebRtc_Word32)fft[i],
outCFFT - aecm->dfaCleanQDomain);
fft[i] = (WebRtc_Word16)WEBRTC_SPL_SAT(WEBRTC_SPL_WORD16_MAX,
tmp32no1 + aecm->outBuf[i],
WEBRTC_SPL_WORD16_MIN);
output[i] = fft[i];
tmp32no1 = WEBRTC_SPL_MUL_16_16_RSFT(
fft[PART_LEN + i],
WebRtcAecm_kSqrtHanning[PART_LEN - i],
14);
tmp32no1 = WEBRTC_SPL_SHIFT_W32(tmp32no1,
outCFFT - aecm->dfaCleanQDomain);
aecm->outBuf[i] = (WebRtc_Word16)WEBRTC_SPL_SAT(
WEBRTC_SPL_WORD16_MAX,
tmp32no1,
WEBRTC_SPL_WORD16_MIN);
}
#ifdef ARM_WINM_LOG_
// measure tick end
QueryPerformanceCounter((LARGE_INTEGER*)&end);
diff__ = ((end - start) * 1000) / (freq/1000);
milliseconds = (unsigned int)(diff__ & 0xffffffff);
WriteFile (logFile, &milliseconds, sizeof(unsigned int), &temp, NULL);
#endif
// Copy the current block to the old position (aecm->outBuf is shifted elsewhere)
memcpy(aecm->xBuf, aecm->xBuf + PART_LEN, sizeof(WebRtc_Word16) * PART_LEN);
memcpy(aecm->dBufNoisy, aecm->dBufNoisy + PART_LEN, sizeof(WebRtc_Word16) * PART_LEN);
if (nearendClean != NULL)
{
memcpy(aecm->dBufClean, aecm->dBufClean + PART_LEN, sizeof(WebRtc_Word16) * PART_LEN);
}
}
void WebRtcAecm_CalcLinearEnergies(AecmCore_t* aecm,
const WebRtc_UWord16* far_spectrum,
WebRtc_Word32* echo_est,
WebRtc_UWord32* far_energy,
WebRtc_UWord32* echo_energy_adapt,
WebRtc_UWord32* echo_energy_stored)
{
int i;
// Get energy for the delayed far end signal and estimated
// echo using both stored and adapted channels.
for (i = 0; i < PART_LEN1; i++)
{
echo_est[i] = WEBRTC_SPL_MUL_16_U16(aecm->channelStored[i],
far_spectrum[i]);
(*far_energy) += (WebRtc_UWord32)(far_spectrum[i]);
(*echo_energy_adapt) += WEBRTC_SPL_UMUL_16_16(aecm->channelAdapt16[i],
far_spectrum[i]);
(*echo_energy_stored) += (WebRtc_UWord32)echo_est[i];
}
}
void WebRtcAecm_StoreAdaptiveChannel(AecmCore_t* aecm,
const WebRtc_UWord16* far_spectrum,
WebRtc_Word32* echo_est)
{
int i;
// During startup we store the channel every block.
memcpy(aecm->channelStored, aecm->channelAdapt16, sizeof(WebRtc_Word16) * PART_LEN1);
// Recalculate echo estimate
for (i = 0; i < PART_LEN; i += 4)
{
echo_est[i] = WEBRTC_SPL_MUL_16_U16(aecm->channelStored[i],
far_spectrum[i]);
echo_est[i + 1] = WEBRTC_SPL_MUL_16_U16(aecm->channelStored[i + 1],
far_spectrum[i + 1]);
echo_est[i + 2] = WEBRTC_SPL_MUL_16_U16(aecm->channelStored[i + 2],
far_spectrum[i + 2]);
echo_est[i + 3] = WEBRTC_SPL_MUL_16_U16(aecm->channelStored[i + 3],
far_spectrum[i + 3]);
}
echo_est[i] = WEBRTC_SPL_MUL_16_U16(aecm->channelStored[i],
far_spectrum[i]);
}
void WebRtcAecm_ResetAdaptiveChannel(AecmCore_t* aecm)
{
int i;
// The stored channel has a significantly lower MSE than the adaptive one for
// two consecutive calculations. Reset the adaptive channel.
memcpy(aecm->channelAdapt16, aecm->channelStored,
sizeof(WebRtc_Word16) * PART_LEN1);
// Restore the W32 channel
for (i = 0; i < PART_LEN; i += 4)
{
aecm->channelAdapt32[i] = WEBRTC_SPL_LSHIFT_W32(
(WebRtc_Word32)aecm->channelStored[i], 16);
aecm->channelAdapt32[i + 1] = WEBRTC_SPL_LSHIFT_W32(
(WebRtc_Word32)aecm->channelStored[i + 1], 16);
aecm->channelAdapt32[i + 2] = WEBRTC_SPL_LSHIFT_W32(
(WebRtc_Word32)aecm->channelStored[i + 2], 16);
aecm->channelAdapt32[i + 3] = WEBRTC_SPL_LSHIFT_W32(
(WebRtc_Word32)aecm->channelStored[i + 3], 16);
}
aecm->channelAdapt32[i] = WEBRTC_SPL_LSHIFT_W32((WebRtc_Word32)aecm->channelStored[i], 16);
}
#endif // !(defined(WEBRTC_ANDROID) && defined(WEBRTC_ARCH_ARM_NEON))

32
src/modules/audio_processing/aecm/aecm_core.h
View File

@ -332,32 +332,44 @@ void WebRtcAecm_BufferFarFrame(AecmCore_t * const aecm, const WebRtc_Word16 * co
void WebRtcAecm_FetchFarFrame(AecmCore_t * const aecm, WebRtc_Word16 * const farend, void WebRtcAecm_FetchFarFrame(AecmCore_t * const aecm, WebRtc_Word16 * const farend,
const int farLen, const int knownDelay); const int farLen, const int knownDelay);
/////////////////////////////////////////////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////////////////
// Some internal functions shared by ARM NEON and generic C code: // Some function pointers, for internal functions shared by ARM NEON and
// generic C code.
// //
typedef void (*CalcLinearEnergies)(
void WebRtcAecm_CalcLinearEnergies(AecmCore_t* aecm, AecmCore_t* aecm,
const WebRtc_UWord16* far_spectrum, const WebRtc_UWord16* far_spectrum,
WebRtc_Word32* echoEst, WebRtc_Word32* echoEst,
WebRtc_UWord32* far_energy, WebRtc_UWord32* far_energy,
WebRtc_UWord32* echo_energy_adapt, WebRtc_UWord32* echo_energy_adapt,
WebRtc_UWord32* echo_energy_stored); WebRtc_UWord32* echo_energy_stored);
extern CalcLinearEnergies WebRtcAecm_CalcLinearEnergies;
void WebRtcAecm_StoreAdaptiveChannel(AecmCore_t* aecm, typedef void (*StoreAdaptiveChannel)(
AecmCore_t* aecm,
const WebRtc_UWord16* far_spectrum, const WebRtc_UWord16* far_spectrum,
WebRtc_Word32* echo_est); WebRtc_Word32* echo_est);
extern StoreAdaptiveChannel WebRtcAecm_StoreAdaptiveChannel;
void WebRtcAecm_ResetAdaptiveChannel(AecmCore_t *aecm); typedef void (*ResetAdaptiveChannel)(AecmCore_t* aecm);
extern ResetAdaptiveChannel WebRtcAecm_ResetAdaptiveChannel;
void WebRtcAecm_WindowAndFFT(WebRtc_Word16* fft, typedef void (*WindowAndFFT)(
WebRtc_Word16* fft,
const WebRtc_Word16* time_signal, const WebRtc_Word16* time_signal,
complex16_t* freq_signal, complex16_t* freq_signal,
int time_signal_scaling); int time_signal_scaling);
extern WindowAndFFT WebRtcAecm_WindowAndFFT;
void WebRtcAecm_InverseFFTAndWindow(AecmCore_t* aecm, typedef void (*InverseFFTAndWindow)(
WebRtc_Word16* fft, AecmCore_t* aecm,
complex16_t* efw, WebRtc_Word16* fft, complex16_t* efw,
WebRtc_Word16* output, WebRtc_Word16* output,
const WebRtc_Word16* nearendClean); const WebRtc_Word16* nearendClean);
extern InverseFFTAndWindow WebRtcAecm_InverseFFTAndWindow;
// Initialization of the above function pointers for ARM Neon.
void WebRtcAecm_InitNeon(void);
#endif #endif

67
src/modules/audio_processing/aecm/aecm_core_neon.c
View File

@ -7,7 +7,6 @@
* in the file PATENTS. All contributing project authors may * in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree. * be found in the AUTHORS file in the root of the source tree.
*/ */
#if defined(WEBRTC_ANDROID) && defined(WEBRTC_ARCH_ARM_NEON)
#include "aecm_core.h" #include "aecm_core.h"
@ -16,7 +15,7 @@
// Square root of Hanning window in Q14. // Square root of Hanning window in Q14.
static const WebRtc_Word16 kSqrtHanningReversed[] __attribute__ ((aligned (8))) = { static const WebRtc_Word16 kSqrtHanningReversed[] __attribute__((aligned(8))) = {
16384, 16373, 16354, 16325, 16384, 16373, 16354, 16325,
16286, 16237, 16179, 16111, 16286, 16237, 16179, 16111,
16034, 15947, 15851, 15746, 16034, 15947, 15851, 15746,
@ -35,18 +34,16 @@ static const WebRtc_Word16 kSqrtHanningReversed[] __attribute__ ((aligned (8)))
1594, 1196, 798, 399 1594, 1196, 798, 399
}; };
void WebRtcAecm_WindowAndFFT(WebRtc_Word16* fft, static void WindowAndFFTNeon(WebRtc_Word16* fft,
const WebRtc_Word16* time_signal, const WebRtc_Word16* time_signal,
complex16_t* freq_signal, complex16_t* freq_signal,
int time_signal_scaling) int time_signal_scaling) {
{
int i, j; int i, j;
int16x4_t tmp16x4_scaling = vdup_n_s16(time_signal_scaling); int16x4_t tmp16x4_scaling = vdup_n_s16(time_signal_scaling);
__asm__("vmov.i16 d21, #0" ::: "d21"); __asm__("vmov.i16 d21, #0" ::: "d21");
for(i = 0, j = 0; i < PART_LEN; i += 4, j += 8) for (i = 0, j = 0; i < PART_LEN; i += 4, j += 8) {
{
int16x4_t tmp16x4_0; int16x4_t tmp16x4_0;
int16x4_t tmp16x4_1; int16x4_t tmp16x4_1;
int32x4_t tmp32x4_0; int32x4_t tmp32x4_0;
@ -80,8 +77,7 @@ void WebRtcAecm_WindowAndFFT(WebRtc_Word16* fft,
WebRtcSpl_ComplexFFT(fft, PART_LEN_SHIFT, 1); WebRtcSpl_ComplexFFT(fft, PART_LEN_SHIFT, 1);
// Take only the first PART_LEN2 samples, and switch the sign of the imaginary part. // Take only the first PART_LEN2 samples, and switch the sign of the imaginary part.
for(i = 0, j = 0; j < PART_LEN2; i += 8, j += 16) for (i = 0, j = 0; j < PART_LEN2; i += 8, j += 16) {
{
__asm__("vld2.16 {d20, d21, d22, d23}, [%0, :256]" : : "r"(&fft[j]) : "q10", "q11"); __asm__("vld2.16 {d20, d21, d22, d23}, [%0, :256]" : : "r"(&fft[j]) : "q10", "q11");
__asm__("vneg.s16 d22, d22" : : : "q10"); __asm__("vneg.s16 d22, d22" : : : "q10");
__asm__("vneg.s16 d23, d23" : : : "q11"); __asm__("vneg.s16 d23, d23" : : : "q11");
@ -90,18 +86,16 @@ void WebRtcAecm_WindowAndFFT(WebRtc_Word16* fft,
} }
} }
void WebRtcAecm_InverseFFTAndWindow(AecmCore_t* aecm, static void InverseFFTAndWindowNeon(AecmCore_t* aecm,
WebRtc_Word16* fft, WebRtc_Word16* fft,
complex16_t* efw, complex16_t* efw,
WebRtc_Word16* output, WebRtc_Word16* output,
const WebRtc_Word16* nearendClean) const WebRtc_Word16* nearendClean) {
{
int i, j, outCFFT; int i, j, outCFFT;
WebRtc_Word32 tmp32no1; WebRtc_Word32 tmp32no1;
// Synthesis // Synthesis
for(i = 0, j = 0; i < PART_LEN; i += 4, j += 8) for (i = 0, j = 0; i < PART_LEN; i += 4, j += 8) {
{
// We overwrite two more elements in fft[], but it's ok. // We overwrite two more elements in fft[], but it's ok.
__asm__("vld2.16 {d20, d21}, [%0, :128]" : : "r"(&(efw[i].real)) : "q10"); __asm__("vld2.16 {d20, d21}, [%0, :128]" : : "r"(&(efw[i].real)) : "q10");
__asm__("vmov q11, q10" : : : "q10", "q11"); __asm__("vmov q11, q10" : : : "q10", "q11");
@ -121,8 +115,7 @@ void WebRtcAecm_InverseFFTAndWindow(AecmCore_t* aecm,
outCFFT = WebRtcSpl_ComplexIFFT(fft, PART_LEN_SHIFT, 1); outCFFT = WebRtcSpl_ComplexIFFT(fft, PART_LEN_SHIFT, 1);
// Take only the real values and scale with outCFFT. // Take only the real values and scale with outCFFT.
for (i = 0, j = 0; i < PART_LEN2; i += 8, j+= 16) for (i = 0, j = 0; i < PART_LEN2; i += 8, j += 16) {
{
__asm__("vld2.16 {d20, d21, d22, d23}, [%0, :256]" : : "r"(&fft[j]) : "q10", "q11"); __asm__("vld2.16 {d20, d21, d22, d23}, [%0, :256]" : : "r"(&fft[j]) : "q10", "q11");
__asm__("vst1.16 {d20, d21}, [%0, :128]" : : "r"(&fft[i]): "q10"); __asm__("vst1.16 {d20, d21}, [%0, :128]" : : "r"(&fft[i]): "q10");
} }
@ -130,8 +123,7 @@ void WebRtcAecm_InverseFFTAndWindow(AecmCore_t* aecm,
int32x4_t tmp32x4_2; int32x4_t tmp32x4_2;
__asm__("vdup.32 %q0, %1" : "=w"(tmp32x4_2) : "r"((WebRtc_Word32) __asm__("vdup.32 %q0, %1" : "=w"(tmp32x4_2) : "r"((WebRtc_Word32)
(outCFFT - aecm->dfaCleanQDomain))); (outCFFT - aecm->dfaCleanQDomain)));
for (i = 0; i < PART_LEN; i += 4) for (i = 0; i < PART_LEN; i += 4) {
{
int16x4_t tmp16x4_0; int16x4_t tmp16x4_0;
int16x4_t tmp16x4_1; int16x4_t tmp16x4_1;
int32x4_t tmp32x4_0; int32x4_t tmp32x4_0;
@ -174,22 +166,19 @@ void WebRtcAecm_InverseFFTAndWindow(AecmCore_t* aecm,
} }
// Copy the current block to the old position (outBuf is shifted elsewhere). // Copy the current block to the old position (outBuf is shifted elsewhere).
for (i = 0; i < PART_LEN; i += 16) for (i = 0; i < PART_LEN; i += 16) {
{
__asm__("vld1.16 {d20, d21, d22, d23}, [%0, :256]" : : __asm__("vld1.16 {d20, d21, d22, d23}, [%0, :256]" : :
"r"(&aecm->xBuf[i + PART_LEN]) : "q10"); "r"(&aecm->xBuf[i + PART_LEN]) : "q10");
__asm__("vst1.16 {d20, d21, d22, d23}, [%0, :256]" : : "r"(&aecm->xBuf[i]): "q10"); __asm__("vst1.16 {d20, d21, d22, d23}, [%0, :256]" : : "r"(&aecm->xBuf[i]): "q10");
} }
for (i = 0; i < PART_LEN; i += 16) for (i = 0; i < PART_LEN; i += 16) {
{
__asm__("vld1.16 {d20, d21, d22, d23}, [%0, :256]" : : __asm__("vld1.16 {d20, d21, d22, d23}, [%0, :256]" : :
"r"(&aecm->dBufNoisy[i + PART_LEN]) : "q10"); "r"(&aecm->dBufNoisy[i + PART_LEN]) : "q10");
__asm__("vst1.16 {d20, d21, d22, d23}, [%0, :256]" : : __asm__("vst1.16 {d20, d21, d22, d23}, [%0, :256]" : :
"r"(&aecm->dBufNoisy[i]): "q10"); "r"(&aecm->dBufNoisy[i]): "q10");
} }
if (nearendClean != NULL) { if (nearendClean != NULL) {
for (i = 0; i < PART_LEN; i += 16) for (i = 0; i < PART_LEN; i += 16) {
{
__asm__("vld1.16 {d20, d21, d22, d23}, [%0, :256]" : : __asm__("vld1.16 {d20, d21, d22, d23}, [%0, :256]" : :
"r"(&aecm->dBufClean[i + PART_LEN]) : "q10"); "r"(&aecm->dBufClean[i + PART_LEN]) : "q10");
__asm__("vst1.16 {d20, d21, d22, d23}, [%0, :256]" : : __asm__("vst1.16 {d20, d21, d22, d23}, [%0, :256]" : :
@ -198,13 +187,12 @@ void WebRtcAecm_InverseFFTAndWindow(AecmCore_t* aecm,
} }
} }
void WebRtcAecm_CalcLinearEnergies(AecmCore_t* aecm, static void CalcLinearEnergiesNeon(AecmCore_t* aecm,
const WebRtc_UWord16* far_spectrum, const WebRtc_UWord16* far_spectrum,
WebRtc_Word32* echo_est, WebRtc_Word32* echo_est,
WebRtc_UWord32* far_energy, WebRtc_UWord32* far_energy,
WebRtc_UWord32* echo_energy_adapt, WebRtc_UWord32* echo_energy_adapt,
WebRtc_UWord32* echo_energy_stored) WebRtc_UWord32* echo_energy_stored) {
{
int i; int i;
register WebRtc_UWord32 far_energy_r; register WebRtc_UWord32 far_energy_r;
@ -216,8 +204,7 @@ void WebRtcAecm_CalcLinearEnergies(AecmCore_t* aecm,
__asm__("vmov.i32 q8, #0" : : : "q8"); // echo_energy_stored __asm__("vmov.i32 q8, #0" : : : "q8"); // echo_energy_stored
__asm__("vmov.i32 q9, #0" : : : "q9"); // echo_energy_adapt __asm__("vmov.i32 q9, #0" : : : "q9"); // echo_energy_adapt
for(i = 0; i < PART_LEN -7; i += 8) for (i = 0; i < PART_LEN - 7; i += 8) {
{
// far_energy += (WebRtc_UWord32)(far_spectrum[i]); // far_energy += (WebRtc_UWord32)(far_spectrum[i]);
__asm__("vld1.16 {d26, d27}, [%0]" : : "r"(&far_spectrum[i]) : "q13"); __asm__("vld1.16 {d26, d27}, [%0]" : : "r"(&far_spectrum[i]) : "q13");
__asm__("vaddw.u16 q14, q14, d26" : : : "q14", "q13"); __asm__("vaddw.u16 q14, q14, d26" : : : "q14", "q13");
@ -264,16 +251,14 @@ void WebRtcAecm_CalcLinearEnergies(AecmCore_t* aecm,
aecm->channelAdapt16[i], far_spectrum[i]); aecm->channelAdapt16[i], far_spectrum[i]);
} }
void WebRtcAecm_StoreAdaptiveChannel(AecmCore_t* aecm, static void StoreAdaptiveChannelNeon(AecmCore_t* aecm,
const WebRtc_UWord16* far_spectrum, const WebRtc_UWord16* far_spectrum,
WebRtc_Word32* echo_est) WebRtc_Word32* echo_est) {
{
int i; int i;
// During startup we store the channel every block. // During startup we store the channel every block.
// Recalculate echo estimate. // Recalculate echo estimate.
for(i = 0; i < PART_LEN -7; i += 8) for (i = 0; i < PART_LEN - 7; i += 8) {
{
// aecm->channelStored[i] = acem->channelAdapt16[i]; // aecm->channelStored[i] = acem->channelAdapt16[i];
// echo_est[i] = WEBRTC_SPL_MUL_16_U16(aecm->channelStored[i], far_spectrum[i]); // echo_est[i] = WEBRTC_SPL_MUL_16_U16(aecm->channelStored[i], far_spectrum[i]);
__asm__("vld1.16 {d26, d27}, [%0]" : : "r"(&far_spectrum[i]) : "q13"); __asm__("vld1.16 {d26, d27}, [%0]" : : "r"(&far_spectrum[i]) : "q13");
@ -288,12 +273,10 @@ void WebRtcAecm_StoreAdaptiveChannel(AecmCore_t* aecm,
echo_est[i] = WEBRTC_SPL_MUL_16_U16(aecm->channelStored[i], far_spectrum[i]); echo_est[i] = WEBRTC_SPL_MUL_16_U16(aecm->channelStored[i], far_spectrum[i]);
} }
void WebRtcAecm_ResetAdaptiveChannel(AecmCore_t* aecm) static void ResetAdaptiveChannelNeon(AecmCore_t* aecm) {
{
int i; int i;
for(i = 0; i < PART_LEN -7; i += 8) for (i = 0; i < PART_LEN - 7; i += 8) {
{
// aecm->channelAdapt16[i] = aecm->channelStored[i]; // aecm->channelAdapt16[i] = aecm->channelStored[i];
// aecm->channelAdapt32[i] = WEBRTC_SPL_LSHIFT_W32((WebRtc_Word32) // aecm->channelAdapt32[i] = WEBRTC_SPL_LSHIFT_W32((WebRtc_Word32)
// aecm->channelStored[i], 16); // aecm->channelStored[i], 16);
@ -311,4 +294,10 @@ void WebRtcAecm_ResetAdaptiveChannel(AecmCore_t* aecm)
(WebRtc_Word32)aecm->channelStored[i], 16); (WebRtc_Word32)aecm->channelStored[i], 16);
} }
#endif // #if defined(WEBRTC_ANDROID) && defined(WEBRTC_ARCH_ARM_NEON) void WebRtcAecm_InitNeon(void) {
WebRtcAecm_WindowAndFFT = WindowAndFFTNeon;
WebRtcAecm_InverseFFTAndWindow = InverseFFTAndWindowNeon;
WebRtcAecm_CalcLinearEnergies = CalcLinearEnergiesNeon;
WebRtcAecm_StoreAdaptiveChannel = StoreAdaptiveChannelNeon;
WebRtcAecm_ResetAdaptiveChannel = ResetAdaptiveChannelNeon;
}

47
src/modules/audio_processing/ns/Android.mk
View File

@ -6,6 +6,8 @@
# in the file PATENTS. All contributing project authors may # in the file PATENTS. All contributing project authors may
# be found in the AUTHORS file in the root of the source tree. # be found in the AUTHORS file in the root of the source tree.
#############################
# Build the non-neon library.
LOCAL_PATH := $(call my-dir) LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS) include $(CLEAR_VARS)
@ -20,25 +22,20 @@ LOCAL_SRC_FILES := \
noise_suppression_x.c \ noise_suppression_x.c \
nsx_core.c nsx_core.c
# floating point # Files for floating point.
# noise_suppression.c ns_core.c # noise_suppression.c ns_core.c
# Flags passed to both C and C++ files. # Flags passed to both C and C++ files.
LOCAL_CFLAGS := \ LOCAL_CFLAGS := $(MY_WEBRTC_COMMON_DEFS)
$(MY_WEBRTC_COMMON_DEFS)
ifeq ($(ARCH_ARM_HAVE_NEON),true)
LOCAL_SRC_FILES += \
nsx_core_neon.c
LOCAL_CFLAGS += \
$(MY_ARM_CFLAGS_NEON)
endif
LOCAL_C_INCLUDES := \ LOCAL_C_INCLUDES := \
$(LOCAL_PATH)/interface \ $(LOCAL_PATH)/interface \
$(LOCAL_PATH)/../utility \ $(LOCAL_PATH)/../utility \
$(LOCAL_PATH)/../../.. \ $(LOCAL_PATH)/../../.. \
$(LOCAL_PATH)/../../../common_audio/signal_processing/include $(LOCAL_PATH)/../../../common_audio/signal_processing/include \
$(LOCAL_PATH)/../../../system_wrappers/interface
LOCAL_STATIC_LIBRARIES += libwebrtc_system_wrappers
LOCAL_SHARED_LIBRARIES := \ LOCAL_SHARED_LIBRARIES := \
libcutils \ libcutils \
@ -49,3 +46,31 @@ ifndef NDK_ROOT
include external/stlport/libstlport.mk include external/stlport/libstlport.mk
endif endif
include $(BUILD_STATIC_LIBRARY) include $(BUILD_STATIC_LIBRARY)
#############################
# Build the neon library.
include $(CLEAR_VARS)
LOCAL_MODULE_CLASS := STATIC_LIBRARIES
LOCAL_MODULE := libwebrtc_ns_neon
LOCAL_MODULE_TAGS := optional
LOCAL_GENERATED_SOURCES :=
LOCAL_SRC_FILES := nsx_core_neon.c
# Flags passed to both C and C++ files.
LOCAL_CFLAGS := \
$(MY_WEBRTC_COMMON_DEFS) \
-mfpu=neon \
-flax-vector-conversions
LOCAL_C_INCLUDES := \
$(LOCAL_PATH)/interface \
$(LOCAL_PATH)/../../.. \
$(LOCAL_PATH)/../../../common_audio/signal_processing/include
ifndef NDK_ROOT
include external/stlport/libstlport.mk
endif
include $(BUILD_STATIC_LIBRARY)

543
src/modules/audio_processing/ns/nsx_core.c
View File

@ -16,6 +16,7 @@
#include <stdlib.h> #include <stdlib.h>
#include <stdio.h> #include <stdio.h>
#include "cpu_features_wrapper.h"
#include "nsx_core.h" #include "nsx_core.h"
// Skip first frequency bins during estimation. (0 <= value < 64) // Skip first frequency bins during estimation. (0 <= value < 64)
@ -426,6 +427,271 @@ static const WebRtc_Word16 kDeterminantEstMatrix[66] = {
355, 330 355, 330
}; };
// Declare function pointers.
NoiseEstimation WebRtcNsx_NoiseEstimation;
PrepareSpectrum WebRtcNsx_PrepareSpectrum;
SynthesisUpdate WebRtcNsx_SynthesisUpdate;
AnalysisUpdate WebRtcNsx_AnalysisUpdate;
Denormalize WebRtcNsx_Denormalize;
CreateComplexBuffer WebRtcNsx_CreateComplexBuffer;
// Update the noise estimation information.
static void UpdateNoiseEstimate(NsxInst_t* inst, int offset) {
WebRtc_Word32 tmp32no1 = 0;
WebRtc_Word32 tmp32no2 = 0;
WebRtc_Word16 tmp16 = 0;
const WebRtc_Word16 kExp2Const = 11819; // Q13
int i = 0;
tmp16 = WebRtcSpl_MaxValueW16(inst->noiseEstLogQuantile + offset,
inst->magnLen);
// Guarantee a Q-domain as high as possible and still fit in int16
inst->qNoise = 14 - (int) WEBRTC_SPL_MUL_16_16_RSFT_WITH_ROUND(
kExp2Const, tmp16, 21);
for (i = 0; i < inst->magnLen; i++) {
// inst->quantile[i]=exp(inst->lquantile[offset+i]);
// in Q21
tmp32no2 = WEBRTC_SPL_MUL_16_16(kExp2Const,
inst->noiseEstLogQuantile[offset + i]);
tmp32no1 = (0x00200000 | (tmp32no2 & 0x001FFFFF)); // 2^21 + frac
tmp16 = (WebRtc_Word16) WEBRTC_SPL_RSHIFT_W32(tmp32no2, 21);
tmp16 -= 21;// shift 21 to get result in Q0
tmp16 += (WebRtc_Word16) inst->qNoise; //shift to get result in Q(qNoise)
if (tmp16 < 0) {
tmp32no1 = WEBRTC_SPL_RSHIFT_W32(tmp32no1, -tmp16);
} else {
tmp32no1 = WEBRTC_SPL_LSHIFT_W32(tmp32no1, tmp16);
}
inst->noiseEstQuantile[i] = WebRtcSpl_SatW32ToW16(tmp32no1);
}
}
// Noise Estimation
static void NoiseEstimationC(NsxInst_t* inst,
uint16_t* magn,
uint32_t* noise,
int16_t* q_noise) {
WebRtc_Word32 numerator = FACTOR_Q16;
WebRtc_Word16 lmagn[HALF_ANAL_BLOCKL], counter, countDiv;
WebRtc_Word16 countProd, delta, zeros, frac;
WebRtc_Word16 log2, tabind, logval, tmp16, tmp16no1, tmp16no2;
const int16_t log2_const = 22713; // Q15
const int16_t width_factor = 21845;
int i, s, offset;
tabind = inst->stages - inst->normData;
assert(tabind < 9);
assert(tabind > -9);
if (tabind < 0) {
logval = -WebRtcNsx_kLogTable[-tabind];
} else {
logval = WebRtcNsx_kLogTable[tabind];
}
// lmagn(i)=log(magn(i))=log(2)*log2(magn(i))
// magn is in Q(-stages), and the real lmagn values are:
// real_lmagn(i)=log(magn(i)*2^stages)=log(magn(i))+log(2^stages)
// lmagn in Q8
for (i = 0; i < inst->magnLen; i++) {
if (magn[i]) {
zeros = WebRtcSpl_NormU32((WebRtc_UWord32)magn[i]);
frac = (WebRtc_Word16)((((WebRtc_UWord32)magn[i] << zeros)
& 0x7FFFFFFF) >> 23);
// log2(magn(i))
assert(frac < 256);
log2 = (WebRtc_Word16)(((31 - zeros) << 8)
+ WebRtcNsx_kLogTableFrac[frac]);
// log2(magn(i))*log(2)
lmagn[i] = (WebRtc_Word16)WEBRTC_SPL_MUL_16_16_RSFT(log2, log2_const, 15);
// + log(2^stages)
lmagn[i] += logval;
} else {
lmagn[i] = logval;//0;
}
}
// loop over simultaneous estimates
for (s = 0; s < SIMULT; s++) {
offset = s * inst->magnLen;
// Get counter values from state
counter = inst->noiseEstCounter[s];
assert(counter < 201);
countDiv = WebRtcNsx_kCounterDiv[counter];
countProd = (WebRtc_Word16)WEBRTC_SPL_MUL_16_16(counter, countDiv);
// quant_est(...)
for (i = 0; i < inst->magnLen; i++) {
// compute delta
if (inst->noiseEstDensity[offset + i] > 512) {
delta = WebRtcSpl_DivW32W16ResW16(numerator,
inst->noiseEstDensity[offset + i]);
} else {
delta = FACTOR_Q7;
if (inst->blockIndex < END_STARTUP_LONG) {
// Smaller step size during startup. This prevents from using
// unrealistic values causing overflow.
delta = FACTOR_Q7_STARTUP;
}
}
// update log quantile estimate
tmp16 = (WebRtc_Word16)WEBRTC_SPL_MUL_16_16_RSFT(delta, countDiv, 14);
if (lmagn[i] > inst->noiseEstLogQuantile[offset + i]) {
// +=QUANTILE*delta/(inst->counter[s]+1) QUANTILE=0.25, =1 in Q2
// CounterDiv=1/(inst->counter[s]+1) in Q15
tmp16 += 2;
tmp16no1 = WEBRTC_SPL_RSHIFT_W16(tmp16, 2);
inst->noiseEstLogQuantile[offset + i] += tmp16no1;
} else {
tmp16 += 1;
tmp16no1 = WEBRTC_SPL_RSHIFT_W16(tmp16, 1);
// *(1-QUANTILE), in Q2 QUANTILE=0.25, 1-0.25=0.75=3 in Q2
tmp16no2 = (WebRtc_Word16)WEBRTC_SPL_MUL_16_16_RSFT(tmp16no1, 3, 1);
inst->noiseEstLogQuantile[offset + i] -= tmp16no2;
if (inst->noiseEstLogQuantile[offset + i] < logval) {
// This is the smallest fixed point representation we can
// have, hence we limit the output.
inst->noiseEstLogQuantile[offset + i] = logval;
}
}
// update density estimate
if (WEBRTC_SPL_ABS_W16(lmagn[i] - inst->noiseEstLogQuantile[offset + i])
< WIDTH_Q8) {
tmp16no1 = (WebRtc_Word16)WEBRTC_SPL_MUL_16_16_RSFT_WITH_ROUND(
inst->noiseEstDensity[offset + i], countProd, 15);
tmp16no2 = (WebRtc_Word16)WEBRTC_SPL_MUL_16_16_RSFT_WITH_ROUND(
width_factor, countDiv, 15);
inst->noiseEstDensity[offset + i] = tmp16no1 + tmp16no2;
}
} // end loop over magnitude spectrum
if (counter >= END_STARTUP_LONG) {
inst->noiseEstCounter[s] = 0;
if (inst->blockIndex >= END_STARTUP_LONG) {
UpdateNoiseEstimate(inst, offset);
}
}
inst->noiseEstCounter[s]++;
} // end loop over simultaneous estimates
// Sequentially update the noise during startup
if (inst->blockIndex < END_STARTUP_LONG) {
UpdateNoiseEstimate(inst, offset);
}
for (i = 0; i < inst->magnLen; i++) {
noise[i] = (WebRtc_UWord32)(inst->noiseEstQuantile[i]); // Q(qNoise)
}
(*q_noise) = (WebRtc_Word16)inst->qNoise;
}
// Filter the data in the frequency domain, and create spectrum.
static void PrepareSpectrumC(NsxInst_t* inst, int16_t* freq_buf) {
int i = 0, j = 0;
int16_t tmp16 = 0;
for (i = 0; i < inst->magnLen; i++) {
inst->real[i] = (WebRtc_Word16)WEBRTC_SPL_MUL_16_16_RSFT(inst->real[i],
(WebRtc_Word16)(inst->noiseSupFilter[i]), 14); // Q(normData-stages)
inst->imag[i] = (WebRtc_Word16)WEBRTC_SPL_MUL_16_16_RSFT(inst->imag[i],
(WebRtc_Word16)(inst->noiseSupFilter[i]), 14); // Q(normData-stages)
}
freq_buf[0] = inst->real[0];
freq_buf[1] = -inst->imag[0];
for (i = 1, j = 2; i < inst->anaLen2; i += 1, j += 2) {
tmp16 = (inst->anaLen << 1) - j;
freq_buf[j] = inst->real[i];
freq_buf[j + 1] = -inst->imag[i];
freq_buf[tmp16] = inst->real[i];
freq_buf[tmp16 + 1] = inst->imag[i];
}
freq_buf[inst->anaLen] = inst->real[inst->anaLen2];
freq_buf[inst->anaLen + 1] = -inst->imag[inst->anaLen2];
}
// Denormalize the input buffer.
static __inline void DenormalizeC(NsxInst_t* inst, int16_t* in, int factor) {
int i = 0, j = 0;
int32_t tmp32 = 0;
for (i = 0, j = 0; i < inst->anaLen; i += 1, j += 2) {
tmp32 = WEBRTC_SPL_SHIFT_W32((WebRtc_Word32)in[j],
factor - inst->normData);
inst->real[i] = WebRtcSpl_SatW32ToW16(tmp32); // Q0
}
}
// For the noise supression process, synthesis, read out fully processed
// segment, and update synthesis buffer.
static void SynthesisUpdateC(NsxInst_t* inst,
int16_t* out_frame,
int16_t gain_factor) {
int i = 0;
int16_t tmp16a = 0;
int16_t tmp16b = 0;
int32_t tmp32 = 0;
// synthesis
for (i = 0; i < inst->anaLen; i++) {
tmp16a = (int16_t)WEBRTC_SPL_MUL_16_16_RSFT_WITH_ROUND(
inst->window[i], inst->real[i], 14); // Q0, window in Q14
tmp32 = WEBRTC_SPL_MUL_16_16_RSFT_WITH_ROUND(tmp16a, gain_factor, 13); // Q0
// Down shift with rounding
tmp16b = WebRtcSpl_SatW32ToW16(tmp32); // Q0
inst->synthesisBuffer[i] = WEBRTC_SPL_ADD_SAT_W16(inst->synthesisBuffer[i],
tmp16b); // Q0
}
// read out fully processed segment
for (i = 0; i < inst->blockLen10ms; i++) {
out_frame[i] = inst->synthesisBuffer[i]; // Q0
}
// update synthesis buffer
WEBRTC_SPL_MEMCPY_W16(inst->synthesisBuffer,
inst->synthesisBuffer + inst->blockLen10ms,
inst->anaLen - inst->blockLen10ms);
WebRtcSpl_ZerosArrayW16(inst->synthesisBuffer
+ inst->anaLen - inst->blockLen10ms, inst->blockLen10ms);
}
// Update analysis buffer for lower band, and window data before FFT.
static void AnalysisUpdateC(NsxInst_t* inst,
int16_t* out,
int16_t* new_speech) {
int i = 0;
// For lower band update analysis buffer.
WEBRTC_SPL_MEMCPY_W16(inst->analysisBuffer,
inst->analysisBuffer + inst->blockLen10ms,
inst->anaLen - inst->blockLen10ms);
WEBRTC_SPL_MEMCPY_W16(inst->analysisBuffer
+ inst->anaLen - inst->blockLen10ms, new_speech, inst->blockLen10ms);
// Window data before FFT.
for (i = 0; i < inst->anaLen; i++) {
out[i] = (int16_t)WEBRTC_SPL_MUL_16_16_RSFT_WITH_ROUND(
inst->window[i], inst->analysisBuffer[i], 14); // Q0
}
}
// Create a complex number buffer (out[]) as the intput (in[]) interleaved with
// zeros, and normalize it.
static __inline void CreateComplexBufferC(NsxInst_t* inst,
int16_t* in,
int16_t* out) {
int i = 0, j = 0;
for (i = 0, j = 0; i < inst->anaLen; i += 1, j += 2) {
out[j] = WEBRTC_SPL_LSHIFT_W16(in[i], inst->normData); // Q(normData)
out[j + 1] = 0; // Insert zeros in imaginary part
}
}
void WebRtcNsx_CalcParametricNoiseEstimate(NsxInst_t* inst, void WebRtcNsx_CalcParametricNoiseEstimate(NsxInst_t* inst,
WebRtc_Word16 pink_noise_exp_avg, WebRtc_Word16 pink_noise_exp_avg,
WebRtc_Word32 pink_noise_num_avg, WebRtc_Word32 pink_noise_num_avg,
@ -600,6 +866,24 @@ WebRtc_Word32 WebRtcNsx_InitCore(NsxInst_t* inst, WebRtc_UWord32 fs) {
inst->file5 = fopen("file5.pcm", "wb"); inst->file5 = fopen("file5.pcm", "wb");
#endif #endif
// Initialize function pointers.
WebRtcNsx_NoiseEstimation = NoiseEstimationC;
WebRtcNsx_PrepareSpectrum = PrepareSpectrumC;
WebRtcNsx_SynthesisUpdate = SynthesisUpdateC;
WebRtcNsx_AnalysisUpdate = AnalysisUpdateC;
WebRtcNsx_Denormalize = DenormalizeC;
WebRtcNsx_CreateComplexBuffer = CreateComplexBufferC;
#ifdef WEBRTC_DETECT_ARM_NEON
uint64_t features = WebRtc_GetCPUFeaturesARM();
if ((features & kCPUFeatureNEON) != 0)
{
WebRtcNsx_InitNeon();
}
#elif defined(WEBRTC_ARCH_ARM_NEON)
WebRtcNsx_InitNeon();
#endif
inst->initFlag = 1; inst->initFlag = 1;
return 0; return 0;
@ -2157,263 +2441,4 @@ int WebRtcNsx_ProcessCore(NsxInst_t* inst, short* speechFrame, short* speechFram
return 0; return 0;
} }
#if !(defined(WEBRTC_ARCH_ARM_NEON) && defined(WEBRTC_ANDROID))
// Update the noise estimation information.
static void UpdateNoiseEstimate(NsxInst_t* inst, int offset) {
WebRtc_Word32 tmp32no1 = 0;
WebRtc_Word32 tmp32no2 = 0;
WebRtc_Word16 tmp16 = 0;
const WebRtc_Word16 kExp2Const = 11819; // Q13
int i = 0;
tmp16 = WebRtcSpl_MaxValueW16(inst->noiseEstLogQuantile + offset,
inst->magnLen);
// Guarantee a Q-domain as high as possible and still fit in int16
inst->qNoise = 14 - (int) WEBRTC_SPL_MUL_16_16_RSFT_WITH_ROUND(
kExp2Const, tmp16, 21);
for (i = 0; i < inst->magnLen; i++) {
// inst->quantile[i]=exp(inst->lquantile[offset+i]);
// in Q21
tmp32no2 = WEBRTC_SPL_MUL_16_16(kExp2Const,
inst->noiseEstLogQuantile[offset + i]);
tmp32no1 = (0x00200000 | (tmp32no2 & 0x001FFFFF)); // 2^21 + frac
tmp16 = (WebRtc_Word16) WEBRTC_SPL_RSHIFT_W32(tmp32no2, 21);
tmp16 -= 21;// shift 21 to get result in Q0
tmp16 += (WebRtc_Word16) inst->qNoise; //shift to get result in Q(qNoise)
if (tmp16 < 0) {
tmp32no1 = WEBRTC_SPL_RSHIFT_W32(tmp32no1, -tmp16);
} else {
tmp32no1 = WEBRTC_SPL_LSHIFT_W32(tmp32no1, tmp16);
}
inst->noiseEstQuantile[i] = WebRtcSpl_SatW32ToW16(tmp32no1);
}
}
// Noise Estimation
void WebRtcNsx_NoiseEstimation(NsxInst_t* inst,
uint16_t* magn,
uint32_t* noise,
int16_t* q_noise) {
WebRtc_Word32 numerator = FACTOR_Q16;
WebRtc_Word16 lmagn[HALF_ANAL_BLOCKL], counter, countDiv;
WebRtc_Word16 countProd, delta, zeros, frac;
WebRtc_Word16 log2, tabind, logval, tmp16, tmp16no1, tmp16no2;
const int16_t log2_const = 22713; // Q15
const int16_t width_factor = 21845;
int i, s, offset;
tabind = inst->stages - inst->normData;
assert(tabind < 9);
assert(tabind > -9);
if (tabind < 0) {
logval = -WebRtcNsx_kLogTable[-tabind];
} else {
logval = WebRtcNsx_kLogTable[tabind];
}
// lmagn(i)=log(magn(i))=log(2)*log2(magn(i))
// magn is in Q(-stages), and the real lmagn values are:
// real_lmagn(i)=log(magn(i)*2^stages)=log(magn(i))+log(2^stages)
// lmagn in Q8
for (i = 0; i < inst->magnLen; i++) {
if (magn[i]) {
zeros = WebRtcSpl_NormU32((WebRtc_UWord32)magn[i]);
frac = (WebRtc_Word16)((((WebRtc_UWord32)magn[i] << zeros)
& 0x7FFFFFFF) >> 23);
// log2(magn(i))
assert(frac < 256);
log2 = (WebRtc_Word16)(((31 - zeros) << 8)
+ WebRtcNsx_kLogTableFrac[frac]);
// log2(magn(i))*log(2)
lmagn[i] = (WebRtc_Word16)WEBRTC_SPL_MUL_16_16_RSFT(log2, log2_const, 15);
// + log(2^stages)
lmagn[i] += logval;
} else {
lmagn[i] = logval;//0;
}
}
// loop over simultaneous estimates
for (s = 0; s < SIMULT; s++) {
offset = s * inst->magnLen;
// Get counter values from state
counter = inst->noiseEstCounter[s];
assert(counter < 201);
countDiv = WebRtcNsx_kCounterDiv[counter];
countProd = (WebRtc_Word16)WEBRTC_SPL_MUL_16_16(counter, countDiv);
// quant_est(...)
for (i = 0; i < inst->magnLen; i++) {
// compute delta
if (inst->noiseEstDensity[offset + i] > 512) {
delta = WebRtcSpl_DivW32W16ResW16(numerator,
inst->noiseEstDensity[offset + i]);
} else {
delta = FACTOR_Q7;
if (inst->blockIndex < END_STARTUP_LONG) {
// Smaller step size during startup. This prevents from using
// unrealistic values causing overflow.
delta = FACTOR_Q7_STARTUP;
}
}
// update log quantile estimate
tmp16 = (WebRtc_Word16)WEBRTC_SPL_MUL_16_16_RSFT(delta, countDiv, 14);
if (lmagn[i] > inst->noiseEstLogQuantile[offset + i]) {
// +=QUANTILE*delta/(inst->counter[s]+1) QUANTILE=0.25, =1 in Q2
// CounterDiv=1/(inst->counter[s]+1) in Q15
tmp16 += 2;
tmp16no1 = WEBRTC_SPL_RSHIFT_W16(tmp16, 2);
inst->noiseEstLogQuantile[offset + i] += tmp16no1;
} else {
tmp16 += 1;
tmp16no1 = WEBRTC_SPL_RSHIFT_W16(tmp16, 1);
// *(1-QUANTILE), in Q2 QUANTILE=0.25, 1-0.25=0.75=3 in Q2
tmp16no2 = (WebRtc_Word16)WEBRTC_SPL_MUL_16_16_RSFT(tmp16no1, 3, 1);
inst->noiseEstLogQuantile[offset + i] -= tmp16no2;
if (inst->noiseEstLogQuantile[offset + i] < logval) {
// This is the smallest fixed point representation we can
// have, hence we limit the output.
inst->noiseEstLogQuantile[offset + i] = logval;
}
}
// update density estimate
if (WEBRTC_SPL_ABS_W16(lmagn[i] - inst->noiseEstLogQuantile[offset + i])
< WIDTH_Q8) {
tmp16no1 = (WebRtc_Word16)WEBRTC_SPL_MUL_16_16_RSFT_WITH_ROUND(
inst->noiseEstDensity[offset + i], countProd, 15);
tmp16no2 = (WebRtc_Word16)WEBRTC_SPL_MUL_16_16_RSFT_WITH_ROUND(
width_factor, countDiv, 15);
inst->noiseEstDensity[offset + i] = tmp16no1 + tmp16no2;
}
} // end loop over magnitude spectrum
if (counter >= END_STARTUP_LONG) {
inst->noiseEstCounter[s] = 0;
if (inst->blockIndex >= END_STARTUP_LONG) {
UpdateNoiseEstimate(inst, offset);
}
}
inst->noiseEstCounter[s]++;
} // end loop over simultaneous estimates
// Sequentially update the noise during startup
if (inst->blockIndex < END_STARTUP_LONG) {
UpdateNoiseEstimate(inst, offset);
}
for (i = 0; i < inst->magnLen; i++) {
noise[i] = (WebRtc_UWord32)(inst->noiseEstQuantile[i]); // Q(qNoise)
}
(*q_noise) = (WebRtc_Word16)inst->qNoise;
}
// Filter the data in the frequency domain, and create spectrum.
void WebRtcNsx_PrepareSpectrum(NsxInst_t* inst, int16_t* freq_buf) {
int i = 0, j = 0;
int16_t tmp16 = 0;
for (i = 0; i < inst->magnLen; i++) {
inst->real[i] = (WebRtc_Word16)WEBRTC_SPL_MUL_16_16_RSFT(inst->real[i],
(WebRtc_Word16)(inst->noiseSupFilter[i]), 14); // Q(normData-stages)
inst->imag[i] = (WebRtc_Word16)WEBRTC_SPL_MUL_16_16_RSFT(inst->imag[i],
(WebRtc_Word16)(inst->noiseSupFilter[i]), 14); // Q(normData-stages)
}
freq_buf[0] = inst->real[0];
freq_buf[1] = -inst->imag[0];
for (i = 1, j = 2; i < inst->anaLen2; i += 1, j += 2) {
tmp16 = (inst->anaLen << 1) - j;
freq_buf[j] = inst->real[i];
freq_buf[j + 1] = -inst->imag[i];
freq_buf[tmp16] = inst->real[i];
freq_buf[tmp16 + 1] = inst->imag[i];
}
freq_buf[inst->anaLen] = inst->real[inst->anaLen2];
freq_buf[inst->anaLen + 1] = -inst->imag[inst->anaLen2];
}
// Denormalize the input buffer.
__inline void WebRtcNsx_Denormalize(NsxInst_t* inst, int16_t* in, int factor) {
int i = 0, j = 0;
int32_t tmp32 = 0;
for (i = 0, j = 0; i < inst->anaLen; i += 1, j += 2) {
tmp32 = WEBRTC_SPL_SHIFT_W32((WebRtc_Word32)in[j],
factor - inst->normData);
inst->real[i] = WebRtcSpl_SatW32ToW16(tmp32); // Q0
}
}
// For the noise supression process, synthesis, read out fully processed
// segment, and update synthesis buffer.
void WebRtcNsx_SynthesisUpdate(NsxInst_t* inst,
int16_t* out_frame,
int16_t gain_factor) {
int i = 0;
int16_t tmp16a = 0;
int16_t tmp16b = 0;
int32_t tmp32 = 0;
// synthesis
for (i = 0; i < inst->anaLen; i++) {
tmp16a = (int16_t)WEBRTC_SPL_MUL_16_16_RSFT_WITH_ROUND(
inst->window[i], inst->real[i], 14); // Q0, window in Q14
tmp32 = WEBRTC_SPL_MUL_16_16_RSFT_WITH_ROUND(tmp16a, gain_factor, 13); // Q0
// Down shift with rounding
tmp16b = WebRtcSpl_SatW32ToW16(tmp32); // Q0
inst->synthesisBuffer[i] = WEBRTC_SPL_ADD_SAT_W16(inst->synthesisBuffer[i],
tmp16b); // Q0
}
// read out fully processed segment
for (i = 0; i < inst->blockLen10ms; i++) {
out_frame[i] = inst->synthesisBuffer[i]; // Q0
}
// update synthesis buffer
WEBRTC_SPL_MEMCPY_W16(inst->synthesisBuffer,
inst->synthesisBuffer + inst->blockLen10ms,
inst->anaLen - inst->blockLen10ms);
WebRtcSpl_ZerosArrayW16(inst->synthesisBuffer
+ inst->anaLen - inst->blockLen10ms, inst->blockLen10ms);
}
// Update analysis buffer for lower band, and window data before FFT.
void WebRtcNsx_AnalysisUpdate(NsxInst_t* inst,
int16_t* out,
int16_t* new_speech) {
int i = 0;
// For lower band update analysis buffer.
WEBRTC_SPL_MEMCPY_W16(inst->analysisBuffer,
inst->analysisBuffer + inst->blockLen10ms,
inst->anaLen - inst->blockLen10ms);
WEBRTC_SPL_MEMCPY_W16(inst->analysisBuffer
+ inst->anaLen - inst->blockLen10ms, new_speech, inst->blockLen10ms);
// Window data before FFT.
for (i = 0; i < inst->anaLen; i++) {
out[i] = (int16_t)WEBRTC_SPL_MUL_16_16_RSFT_WITH_ROUND(
inst->window[i], inst->analysisBuffer[i], 14); // Q0
}
}
// Create a complex number buffer (out[]) as the intput (in[]) interleaved with
// zeros, and normalize it.
__inline void WebRtcNsx_CreateComplexBuffer(NsxInst_t* inst,
int16_t* in,
int16_t* out) {
int i = 0, j = 0;
for (i = 0, j = 0; i < inst->anaLen; i += 1, j += 2) {
out[j] = WEBRTC_SPL_LSHIFT_W16(in[i], inst->normData); // Q(normData)
out[j + 1] = 0; // Insert zeros in imaginary part
}
}
#endif // !(defined(WEBRTC_ARCH_ARM_NEON) && defined(WEBRTC_ANDROID))

27
src/modules/audio_processing/ns/nsx_core.h
View File

@ -165,40 +165,51 @@ int WebRtcNsx_ProcessCore(NsxInst_t* inst,
short* outFrameHigh); short* outFrameHigh);
/**************************************************************************** /****************************************************************************
* Internal functions and variable declarations shared with optimized code. * Some function pointers, for internal functions shared by ARM NEON and
* generic C code.
*/ */
// Noise Estimation. // Noise Estimation.
void WebRtcNsx_NoiseEstimation(NsxInst_t* inst, typedef void (*NoiseEstimation)(NsxInst_t* inst,
uint16_t* magn, uint16_t* magn,
uint32_t* noise, uint32_t* noise,
int16_t* q_noise); int16_t* q_noise);
extern NoiseEstimation WebRtcNsx_NoiseEstimation;
// Filter the data in the frequency domain, and create spectrum. // Filter the data in the frequency domain, and create spectrum.
void WebRtcNsx_PrepareSpectrum(NsxInst_t* inst, typedef void (*PrepareSpectrum)(NsxInst_t* inst,
int16_t* freq_buff); int16_t* freq_buff);
extern PrepareSpectrum WebRtcNsx_PrepareSpectrum;
// For the noise supression process, synthesis, read out fully processed // For the noise supression process, synthesis, read out fully processed
// segment, and update synthesis buffer. // segment, and update synthesis buffer.
void WebRtcNsx_SynthesisUpdate(NsxInst_t* inst, typedef void (*SynthesisUpdate)(NsxInst_t* inst,
int16_t* out_frame, int16_t* out_frame,
int16_t gain_factor); int16_t gain_factor);
extern SynthesisUpdate WebRtcNsx_SynthesisUpdate;
// Update analysis buffer for lower band, and window data before FFT. // Update analysis buffer for lower band, and window data before FFT.
void WebRtcNsx_AnalysisUpdate(NsxInst_t* inst, typedef void (*AnalysisUpdate)(NsxInst_t* inst,
int16_t* out, int16_t* out,
int16_t* new_speech); int16_t* new_speech);
extern AnalysisUpdate WebRtcNsx_AnalysisUpdate;
// Denormalize the input buffer. // Denormalize the input buffer.
__inline void WebRtcNsx_Denormalize(NsxInst_t* inst, typedef void (*Denormalize)(NsxInst_t* inst,
int16_t* in, int16_t* in,
int factor); int factor);
extern Denormalize WebRtcNsx_Denormalize;
// Create a complex number buffer, as the intput interleaved with zeros, // Create a complex number buffer, as the intput interleaved with zeros,
// and normalize it. // and normalize it.
__inline void WebRtcNsx_CreateComplexBuffer(NsxInst_t* inst, typedef void (*CreateComplexBuffer)(NsxInst_t* inst,
int16_t* in, int16_t* in,
int16_t* out); int16_t* out);
extern CreateComplexBuffer WebRtcNsx_CreateComplexBuffer;
/****************************************************************************
* Initialization of the above function pointers for ARM Neon.
*/
void WebRtcNsx_InitNeon(void);
extern const WebRtc_Word16 WebRtcNsx_kLogTable[9]; extern const WebRtc_Word16 WebRtcNsx_kLogTable[9];
extern const WebRtc_Word16 WebRtcNsx_kLogTableFrac[256]; extern const WebRtc_Word16 WebRtcNsx_kLogTableFrac[256];

52
src/modules/audio_processing/ns/nsx_core_neon.c
View File

@ -8,15 +8,13 @@
* be found in the AUTHORS file in the root of the source tree. * be found in the AUTHORS file in the root of the source tree.
*/ */
#if defined(WEBRTC_ARCH_ARM_NEON) && defined(WEBRTC_ANDROID)
#include "nsx_core.h" #include "nsx_core.h"
#include <arm_neon.h> #include <arm_neon.h>
#include <assert.h> #include <assert.h>
// Update the noise estimation information. // Update the noise estimation information.
static void UpdateNoiseEstimate(NsxInst_t* inst, int offset) { static void UpdateNoiseEstimateNeon(NsxInst_t* inst, int offset) {
int i = 0; int i = 0;
const int16_t kExp2Const = 11819; // Q13 const int16_t kExp2Const = 11819; // Q13
int16_t* ptr_noiseEstLogQuantile = NULL; int16_t* ptr_noiseEstLogQuantile = NULL;
@ -94,7 +92,7 @@ static void UpdateNoiseEstimate(NsxInst_t* inst, int offset) {
} }
// Noise Estimation // Noise Estimation
void WebRtcNsx_NoiseEstimation(NsxInst_t* inst, static void NoiseEstimationNeon(NsxInst_t* inst,
uint16_t* magn, uint16_t* magn,
uint32_t* noise, uint32_t* noise,
int16_t* q_noise) { int16_t* q_noise) {
@ -302,7 +300,7 @@ void WebRtcNsx_NoiseEstimation(NsxInst_t* inst,
if (counter >= END_STARTUP_LONG) { if (counter >= END_STARTUP_LONG) {
inst->noiseEstCounter[s] = 0; inst->noiseEstCounter[s] = 0;
if (inst->blockIndex >= END_STARTUP_LONG) { if (inst->blockIndex >= END_STARTUP_LONG) {
UpdateNoiseEstimate(inst, offset); UpdateNoiseEstimateNeon(inst, offset);
} }
} }
inst->noiseEstCounter[s]++; inst->noiseEstCounter[s]++;
@ -311,7 +309,7 @@ void WebRtcNsx_NoiseEstimation(NsxInst_t* inst,
// Sequentially update the noise during startup // Sequentially update the noise during startup
if (inst->blockIndex < END_STARTUP_LONG) { if (inst->blockIndex < END_STARTUP_LONG) {
UpdateNoiseEstimate(inst, offset); UpdateNoiseEstimateNeon(inst, offset);
} }
for (i = 0; i < inst->magnLen; i++) { for (i = 0; i < inst->magnLen; i++) {
@ -321,7 +319,7 @@ void WebRtcNsx_NoiseEstimation(NsxInst_t* inst,
} }
// Filter the data in the frequency domain, and create spectrum. // Filter the data in the frequency domain, and create spectrum.
void WebRtcNsx_PrepareSpectrum(NsxInst_t* inst, int16_t* freq_buf) { static void PrepareSpectrumNeon(NsxInst_t* inst, int16_t* freq_buf) {
// (1) Filtering. // (1) Filtering.
@ -338,7 +336,7 @@ void WebRtcNsx_PrepareSpectrum(NsxInst_t* inst, int16_t* freq_buf) {
uint16_t* ptr_noiseSupFilter = &inst->noiseSupFilter[0]; uint16_t* ptr_noiseSupFilter = &inst->noiseSupFilter[0];
// Filter the rest in the frequency domain. // Filter the rest in the frequency domain.
for (; ptr_real < &inst->real[inst->magnLen - 1]; ) { for (; ptr_real < &inst->real[inst->magnLen - 1];) {
// Loop unrolled once. Both pointers are incremented by 4 twice. // Loop unrolled once. Both pointers are incremented by 4 twice.
__asm__ __volatile__( __asm__ __volatile__(
"vld1.16 d20, [%[ptr_real]]\n\t" "vld1.16 d20, [%[ptr_real]]\n\t"
@ -400,7 +398,7 @@ void WebRtcNsx_PrepareSpectrum(NsxInst_t* inst, int16_t* freq_buf) {
int16_t* ptr_realImag2 = ptr_realImag2 = &freq_buf[(inst->anaLen << 1) - 8]; int16_t* ptr_realImag2 = ptr_realImag2 = &freq_buf[(inst->anaLen << 1) - 8];
ptr_real = &inst->real[1]; ptr_real = &inst->real[1];
ptr_imag = &inst->imag[1]; ptr_imag = &inst->imag[1];
for (; ptr_real < &inst->real[inst->anaLen2 - 11]; ) { for (; ptr_real < &inst->real[inst->anaLen2 - 11];) {
// Loop unrolled once. All pointers are incremented twice. // Loop unrolled once. All pointers are incremented twice.
__asm__ __volatile__( __asm__ __volatile__(
"vld1.16 d22, [%[ptr_real]]!\n\t" "vld1.16 d22, [%[ptr_real]]!\n\t"
@ -456,13 +454,13 @@ void WebRtcNsx_PrepareSpectrum(NsxInst_t* inst, int16_t* freq_buf) {
} }
// Denormalize the input buffer. // Denormalize the input buffer.
__inline void WebRtcNsx_Denormalize(NsxInst_t* inst, int16_t* in, int factor) { static __inline void DenormalizeNeon(NsxInst_t* inst, int16_t* in, int factor) {
int16_t* ptr_real = &inst->real[0]; int16_t* ptr_real = &inst->real[0];
int16_t* ptr_in = &in[0]; int16_t* ptr_in = &in[0];
__asm__ __volatile__("vdup.32 q10, %0" :: __asm__ __volatile__("vdup.32 q10, %0" ::
"r"((int32_t)(factor - inst->normData)) : "q10"); "r"((int32_t)(factor - inst->normData)) : "q10");
for (; ptr_real < &inst->real[inst->anaLen]; ) { for (; ptr_real < &inst->real[inst->anaLen];) {
// Loop unrolled once. Both pointers are incremented. // Loop unrolled once. Both pointers are incremented.
__asm__ __volatile__( __asm__ __volatile__(
@ -495,7 +493,7 @@ __inline void WebRtcNsx_Denormalize(NsxInst_t* inst, int16_t* in, int factor) {
// For the noise supress process, synthesis, read out fully processed segment, // For the noise supress process, synthesis, read out fully processed segment,
// and update synthesis buffer. // and update synthesis buffer.
void WebRtcNsx_SynthesisUpdate(NsxInst_t* inst, static void SynthesisUpdateNeon(NsxInst_t* inst,
int16_t* out_frame, int16_t* out_frame,
int16_t gain_factor) { int16_t gain_factor) {
int16_t* ptr_real = &inst->real[0]; int16_t* ptr_real = &inst->real[0];
@ -505,7 +503,7 @@ void WebRtcNsx_SynthesisUpdate(NsxInst_t* inst,
// synthesis // synthesis
__asm__ __volatile__("vdup.16 d24, %0" : : "r"(gain_factor) : "d24"); __asm__ __volatile__("vdup.16 d24, %0" : : "r"(gain_factor) : "d24");
// Loop unrolled once. All pointers are incremented in the assembly code. // Loop unrolled once. All pointers are incremented in the assembly code.
for (; ptr_syn < &inst->synthesisBuffer[inst->anaLen]; ) { for (; ptr_syn < &inst->synthesisBuffer[inst->anaLen];) {
__asm__ __volatile__( __asm__ __volatile__(
// Load variables. // Load variables.
"vld1.16 d22, [%[ptr_real]]!\n\t" "vld1.16 d22, [%[ptr_real]]!\n\t"
@ -553,7 +551,7 @@ void WebRtcNsx_SynthesisUpdate(NsxInst_t* inst,
int16_t* ptr_out = &out_frame[0]; int16_t* ptr_out = &out_frame[0];
ptr_syn = &inst->synthesisBuffer[0]; ptr_syn = &inst->synthesisBuffer[0];
// read out fully processed segment // read out fully processed segment
for (; ptr_syn < &inst->synthesisBuffer[inst->blockLen10ms]; ) { for (; ptr_syn < &inst->synthesisBuffer[inst->blockLen10ms];) {
// Loop unrolled once. Both pointers are incremented in the assembly code. // Loop unrolled once. Both pointers are incremented in the assembly code.
__asm__ __volatile__( __asm__ __volatile__(
// out_frame[i] = inst->synthesisBuffer[i]; // Q0 // out_frame[i] = inst->synthesisBuffer[i]; // Q0
@ -575,7 +573,7 @@ void WebRtcNsx_SynthesisUpdate(NsxInst_t* inst,
// inst->anaLen - inst->blockLen10ms); // inst->anaLen - inst->blockLen10ms);
ptr_out = &inst->synthesisBuffer[0], ptr_out = &inst->synthesisBuffer[0],
ptr_syn = &inst->synthesisBuffer[inst->blockLen10ms]; ptr_syn = &inst->synthesisBuffer[inst->blockLen10ms];
for (; ptr_syn < &inst->synthesisBuffer[inst->anaLen]; ) { for (; ptr_syn < &inst->synthesisBuffer[inst->anaLen];) {
// Loop unrolled once. Both pointers are incremented in the assembly code. // Loop unrolled once. Both pointers are incremented in the assembly code.
__asm__ __volatile__( __asm__ __volatile__(
"vld1.16 {d22, d23}, [%[ptr_syn]]!\n\t" "vld1.16 {d22, d23}, [%[ptr_syn]]!\n\t"
@ -593,7 +591,7 @@ void WebRtcNsx_SynthesisUpdate(NsxInst_t* inst,
// WebRtcSpl_ZerosArrayW16(inst->synthesisBuffer // WebRtcSpl_ZerosArrayW16(inst->synthesisBuffer
// + inst->anaLen - inst->blockLen10ms, inst->blockLen10ms); // + inst->anaLen - inst->blockLen10ms, inst->blockLen10ms);
__asm__ __volatile__("vdup.16 q10, %0" : : "r"(0) : "q10"); __asm__ __volatile__("vdup.16 q10, %0" : : "r"(0) : "q10");
for (; ptr_out < &inst->synthesisBuffer[inst->anaLen]; ) { for (; ptr_out < &inst->synthesisBuffer[inst->anaLen];) {
// Loop unrolled once. Pointer is incremented in the assembly code. // Loop unrolled once. Pointer is incremented in the assembly code.
__asm__ __volatile__( __asm__ __volatile__(
"vst1.16 {d20, d21}, [%[ptr_out]]!\n\t" "vst1.16 {d20, d21}, [%[ptr_out]]!\n\t"
@ -606,7 +604,7 @@ void WebRtcNsx_SynthesisUpdate(NsxInst_t* inst,
} }
// Update analysis buffer for lower band, and window data before FFT. // Update analysis buffer for lower band, and window data before FFT.
void WebRtcNsx_AnalysisUpdate(NsxInst_t* inst, static void AnalysisUpdateNeon(NsxInst_t* inst,
int16_t* out, int16_t* out,
int16_t* new_speech) { int16_t* new_speech) {
@ -617,7 +615,7 @@ void WebRtcNsx_AnalysisUpdate(NsxInst_t* inst,
// WEBRTC_SPL_MEMCPY_W16(inst->analysisBuffer, // WEBRTC_SPL_MEMCPY_W16(inst->analysisBuffer,
// inst->analysisBuffer + inst->blockLen10ms, // inst->analysisBuffer + inst->blockLen10ms,
// inst->anaLen - inst->blockLen10ms); // inst->anaLen - inst->blockLen10ms);
for (; ptr_out < &inst->analysisBuffer[inst->anaLen - inst->blockLen10ms]; ) { for (; ptr_out < &inst->analysisBuffer[inst->anaLen - inst->blockLen10ms];) {
// Loop unrolled once, so both pointers are incremented by 8 twice. // Loop unrolled once, so both pointers are incremented by 8 twice.
__asm__ __volatile__( __asm__ __volatile__(
"vld1.16 {d20, d21}, [%[ptr_ana]]!\n\t" "vld1.16 {d20, d21}, [%[ptr_ana]]!\n\t"
@ -633,7 +631,7 @@ void WebRtcNsx_AnalysisUpdate(NsxInst_t* inst,
// WEBRTC_SPL_MEMCPY_W16(inst->analysisBuffer // WEBRTC_SPL_MEMCPY_W16(inst->analysisBuffer
// + inst->anaLen - inst->blockLen10ms, new_speech, inst->blockLen10ms); // + inst->anaLen - inst->blockLen10ms, new_speech, inst->blockLen10ms);
for (ptr_ana = new_speech; ptr_out < &inst->analysisBuffer[inst->anaLen]; ) { for (ptr_ana = new_speech; ptr_out < &inst->analysisBuffer[inst->anaLen];) {
// Loop unrolled once, so both pointers are incremented by 8 twice. // Loop unrolled once, so both pointers are incremented by 8 twice.
__asm__ __volatile__( __asm__ __volatile__(
"vld1.16 {d20, d21}, [%[ptr_ana]]!\n\t" "vld1.16 {d20, d21}, [%[ptr_ana]]!\n\t"
@ -651,7 +649,7 @@ void WebRtcNsx_AnalysisUpdate(NsxInst_t* inst,
int16_t* ptr_window = &inst->window[0]; int16_t* ptr_window = &inst->window[0];
ptr_out = &out[0]; ptr_out = &out[0];
ptr_ana = &inst->analysisBuffer[0]; ptr_ana = &inst->analysisBuffer[0];
for (; ptr_out < &out[inst->anaLen]; ) { for (; ptr_out < &out[inst->anaLen];) {
// Loop unrolled once, so all pointers are incremented by 4 twice. // Loop unrolled once, so all pointers are incremented by 4 twice.
__asm__ __volatile__( __asm__ __volatile__(
@ -683,7 +681,7 @@ void WebRtcNsx_AnalysisUpdate(NsxInst_t* inst,
// Create a complex number buffer (out[]) as the intput (in[]) interleaved with // Create a complex number buffer (out[]) as the intput (in[]) interleaved with
// zeros, and normalize it. // zeros, and normalize it.
__inline void WebRtcNsx_CreateComplexBuffer(NsxInst_t* inst, static __inline void CreateComplexBufferNeon(NsxInst_t* inst,
int16_t* in, int16_t* in,
int16_t* out) { int16_t* out) {
int16_t* ptr_out = &out[0]; int16_t* ptr_out = &out[0];
@ -691,7 +689,7 @@ __inline void WebRtcNsx_CreateComplexBuffer(NsxInst_t* inst,
__asm__ __volatile__("vdup.16 d25, %0" : : "r"(0) : "d25"); __asm__ __volatile__("vdup.16 d25, %0" : : "r"(0) : "d25");
__asm__ __volatile__("vdup.16 q10, %0" : : "r"(inst->normData) : "q10"); __asm__ __volatile__("vdup.16 q10, %0" : : "r"(inst->normData) : "q10");
for (; ptr_in < &in[inst->anaLen]; ) { for (; ptr_in < &in[inst->anaLen];) {
// Loop unrolled once, so ptr_in is incremented by 8 twice, // Loop unrolled once, so ptr_in is incremented by 8 twice,
// and ptr_out is incremented by 8 four times. // and ptr_out is incremented by 8 four times.
@ -724,4 +722,12 @@ __inline void WebRtcNsx_CreateComplexBuffer(NsxInst_t* inst,
); );
} }
} }
#endif // defined(WEBRTC_ARCH_ARM_NEON) && defined(WEBRTC_ANDROID)
void WebRtcNsx_InitNeon(void) {
WebRtcNsx_NoiseEstimation = NoiseEstimationNeon;
WebRtcNsx_PrepareSpectrum = PrepareSpectrumNeon;
WebRtcNsx_SynthesisUpdate = SynthesisUpdateNeon;
WebRtcNsx_AnalysisUpdate = AnalysisUpdateNeon;
WebRtcNsx_Denormalize = DenormalizeNeon;
WebRtcNsx_CreateComplexBuffer = CreateComplexBufferNeon;
}

17
src/system_wrappers/interface/cpu_features_wrapper.h
View File

@ -15,18 +15,33 @@
extern "C" { extern "C" {
#endif #endif
// list of features. #include <typedefs.h>
// List of features in x86.
typedef enum { typedef enum {
kSSE2, kSSE2,
kSSE3 kSSE3
} CPUFeature; } CPUFeature;
// List of features in ARM.
enum {
kCPUFeatureARMv7 = (1 << 0),
kCPUFeatureVFPv3 = (1 << 1),
kCPUFeatureNEON = (1 << 2),
kCPUFeatureLDREXSTREX = (1 << 3)
};
typedef int (*WebRtc_CPUInfo)(CPUFeature feature); typedef int (*WebRtc_CPUInfo)(CPUFeature feature);
// returns true if the CPU supports the feature. // returns true if the CPU supports the feature.
extern WebRtc_CPUInfo WebRtc_GetCPUInfo; extern WebRtc_CPUInfo WebRtc_GetCPUInfo;
// No CPU feature is available => straight C path. // No CPU feature is available => straight C path.
extern WebRtc_CPUInfo WebRtc_GetCPUInfoNoASM; extern WebRtc_CPUInfo WebRtc_GetCPUInfoNoASM;
// Return the features in an ARM device.
// It detects the features in the hardware platform, and returns supported
// values in the above enum definition as a bitmask.
extern uint64_t WebRtc_GetCPUFeaturesARM(void);
#if defined(__cplusplus) || defined(c_plusplus) #if defined(__cplusplus) || defined(c_plusplus)
} // extern "C" } // extern "C"
#endif #endif

1
src/system_wrappers/source/Android.mk
View File

@ -25,6 +25,7 @@ LOCAL_SRC_FILES := \
condition_variable.cc \ condition_variable.cc \
cpu_dummy.cc \ cpu_dummy.cc \
cpu_features.cc \ cpu_features.cc \
cpu_features_arm.c \
cpu_info.cc \ cpu_info.cc \
critical_section.cc \ critical_section.cc \
event.cc \ event.cc \

333
src/system_wrappers/source/cpu_features_arm.c Normal file
View File

@ -0,0 +1,333 @@
/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
// This file is derived from Android's NDK package r7, located at
// <ndk>/sources/android/cpufeatures/ (downloadable from
// http://developer.android.com/sdk/ndk/index.html).
#include "cpu_features_wrapper.h"
#include <fcntl.h>
#include <errno.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
// Define CPU family.
typedef enum {
CPU_FAMILY_UNKNOWN = 0,
CPU_FAMILY_ARM,
CPU_FAMILY_X86,
CPU_FAMILY_MAX // Do not remove.
} CpuFamily;
static pthread_once_t g_once;
static CpuFamily g_cpuFamily;
static uint64_t g_cpuFeatures;
static int g_cpuCount;
static const int cpufeatures_debug = 0;
#ifdef __arm__
# define DEFAULT_CPU_FAMILY CPU_FAMILY_ARM
#elif defined __i386__
# define DEFAULT_CPU_FAMILY CPU_FAMILY_X86
#else
# define DEFAULT_CPU_FAMILY CPU_FAMILY_UNKNOWN
#endif
#define D(...) \
do { \
if (cpufeatures_debug) { \
printf(__VA_ARGS__); fflush(stdout); \
} \
} while (0)
/* Read the content of /proc/cpuinfo into a user-provided buffer.
* Return the length of the data, or -1 on error. Does *not*
* zero-terminate the content. Will not read more
* than 'buffsize' bytes.
*/
static int read_file(const char* pathname, char* buffer, size_t buffsize) {
int fd, len;
fd = open(pathname, O_RDONLY);
if (fd < 0)
return -1;
do {
len = read(fd, buffer, buffsize);
} while (len < 0 && errno == EINTR);
close(fd);
return len;
}
/* Extract the content of a the first occurence of a given field in
* the content of /proc/cpuinfo and return it as a heap-allocated
* string that must be freed by the caller.
*
* Return NULL if not found
*/
static char* extract_cpuinfo_field(char* buffer, int buflen, const char* field) {
int fieldlen = strlen(field);
char* bufend = buffer + buflen;
char* result = NULL;
int len, ignore;
const char* p, *q;
/* Look for first field occurence, and ensures it starts the line.
*/
p = buffer;
bufend = buffer + buflen;
for (;;) {
p = memmem(p, bufend - p, field, fieldlen);
if (p == NULL)
goto EXIT;
if (p == buffer || p[-1] == '\n')
break;
p += fieldlen;
}
/* Skip to the first column followed by a space */
p += fieldlen;
p = memchr(p, ':', bufend - p);
if (p == NULL || p[1] != ' ')
goto EXIT;
/* Find the end of the line */
p += 2;
q = memchr(p, '\n', bufend - p);
if (q == NULL)
q = bufend;
/* Copy the line into a heap-allocated buffer */
len = q - p;
result = malloc(len + 1);
if (result == NULL)
goto EXIT;
memcpy(result, p, len);
result[len] = '\0';
EXIT:
return result;
}
/* Count the number of occurences of a given field prefix in /proc/cpuinfo.
*/
static int count_cpuinfo_field(char* buffer, int buflen, const char* field) {
int fieldlen = strlen(field);
const char* p = buffer;
const char* bufend = buffer + buflen;
const char* q;
int count = 0;
for (;;) {
const char* q;
p = memmem(p, bufend - p, field, fieldlen);
if (p == NULL)
break;
/* Ensure that the field is at the start of a line */
if (p > buffer && p[-1] != '\n') {
p += fieldlen;
continue;
}
/* skip any whitespace */
q = p + fieldlen;
while (q < bufend && (*q == ' ' || *q == '\t'))
q++;
/* we must have a colon now */
if (q < bufend && *q == ':') {
count += 1;
q ++;
}
p = q;
}
return count;
}
/* Like strlen(), but for constant string literals */
#define STRLEN_CONST(x) ((sizeof(x)-1)
/* Checks that a space-separated list of items contains one given 'item'.
* Returns 1 if found, 0 otherwise.
*/
static int has_list_item(const char* list, const char* item) {
const char* p = list;
int itemlen = strlen(item);
if (list == NULL)
return 0;
while (*p) {
const char* q;
/* skip spaces */
while (*p == ' ' || *p == '\t')
p++;
/* find end of current list item */
q = p;
while (*q && *q != ' ' && *q != '\t')
q++;
if (itemlen == q - p && !memcmp(p, item, itemlen))
return 1;
/* skip to next item */
p = q;
}
return 0;
}
static void cpuInit(void) {
char cpuinfo[4096];
int cpuinfo_len;
g_cpuFamily = DEFAULT_CPU_FAMILY;
g_cpuFeatures = 0;
g_cpuCount = 1;
cpuinfo_len = read_file("/proc/cpuinfo", cpuinfo, sizeof cpuinfo);
D("cpuinfo_len is (%d):\n%.*s\n", cpuinfo_len,
cpuinfo_len >= 0 ? cpuinfo_len : 0, cpuinfo);
if (cpuinfo_len < 0) { /* should not happen */
return;
}
/* Count the CPU cores, the value may be 0 for single-core CPUs */
g_cpuCount = count_cpuinfo_field(cpuinfo, cpuinfo_len, "processor");
if (g_cpuCount == 0) {
g_cpuCount = count_cpuinfo_field(cpuinfo, cpuinfo_len, "Processor");
if (g_cpuCount == 0) {
g_cpuCount = 1;
}
}
D("found cpuCount = %d\n", g_cpuCount);
#ifdef __arm__
{
char* features = NULL;
char* architecture = NULL;
/* Extract architecture from the "CPU Architecture" field.
* The list is well-known, unlike the the output of
* the 'Processor' field which can vary greatly.
*
* See the definition of the 'proc_arch' array in
* $KERNEL/arch/arm/kernel/setup.c and the 'c_show' function in
* same file.
*/
char* cpuArch = extract_cpuinfo_field(cpuinfo, cpuinfo_len,
"CPU architecture");
if (cpuArch != NULL) {
char* end;
long archNumber;
int hasARMv7 = 0;
D("found cpuArch = '%s'\n", cpuArch);
/* read the initial decimal number, ignore the rest */
archNumber = strtol(cpuArch, &end, 10);
/* Here we assume that ARMv8 will be upwards compatible with v7
* in the future. Unfortunately, there is no 'Features' field to
* indicate that Thumb-2 is supported.
*/
if (end > cpuArch && archNumber >= 7) {
hasARMv7 = 1;
}
/* Unfortunately, it seems that certain ARMv6-based CPUs
* report an incorrect architecture number of 7!
*
* We try to correct this by looking at the 'elf_format'
* field reported by the 'Processor' field, which is of the
* form of "(v7l)" for an ARMv7-based CPU, and "(v6l)" for
* an ARMv6-one.
*/
if (hasARMv7) {
char* cpuProc = extract_cpuinfo_field(cpuinfo, cpuinfo_len,
"Processor");
if (cpuProc != NULL) {
D("found cpuProc = '%s'\n", cpuProc);
if (has_list_item(cpuProc, "(v6l)")) {
D("CPU processor and architecture mismatch!!\n");
hasARMv7 = 0;
}
free(cpuProc);
}
}
if (hasARMv7) {
g_cpuFeatures |= kCPUFeatureARMv7;
}
/* The LDREX / STREX instructions are available from ARMv6 */
if (archNumber >= 6) {
g_cpuFeatures |= kCPUFeatureLDREXSTREX;
}
free(cpuArch);
}
/* Extract the list of CPU features from 'Features' field */
char* cpuFeatures = extract_cpuinfo_field(cpuinfo, cpuinfo_len,
"Features");
if (cpuFeatures != NULL) {
D("found cpuFeatures = '%s'\n", cpuFeatures);
if (has_list_item(cpuFeatures, "vfpv3"))
g_cpuFeatures |= kCPUFeatureVFPv3;
else if (has_list_item(cpuFeatures, "vfpv3d16"))
g_cpuFeatures |= kCPUFeatureVFPv3;
if (has_list_item(cpuFeatures, "neon")) {
/* Note: Certain kernels only report neon but not vfpv3
* in their features list. However, ARM mandates
* that if Neon is implemented, so must be VFPv3
* so always set the flag.
*/
g_cpuFeatures |= kCPUFeatureNEON |
kCPUFeatureVFPv3;
}
free(cpuFeatures);
}
}
#endif // __arm__
#ifdef __i386__
g_cpuFamily = CPU_FAMILY_X86;
#endif
}
uint64_t WebRtc_GetCPUFeaturesARM(void) {
pthread_once(&g_once, cpuInit);
return g_cpuFeatures;
}