zqz/platform-external-webrtc
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Break out WebRtcNs_Windowing function in ns_core

Browse Source 
This is done in order to make the code more readible and maintainable.
This introduces only +1 and -1 errors.

BUG=webrtc:3811
R=bjornv@webrtc.org, kwiberg@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/29809004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@7488 4adac7df-926f-26a2-2b94-8c16560cd09d
This commit is contained in:
aluebs@webrtc.org
2014-10-21 22:35:40 +00:00
parent 0e7099244c
commit 67cf1d742b
1 changed files with 23 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

30
webrtc/modules/audio_processing/ns/ns_core.c
View File

@ -827,6 +827,24 @@ static float Energy(const float* buffer, int length) {
return energy;
}
// Windows a buffer.
// Inputs:
// * |window| is the window by which to multiply.
// * |data| is the data without windowing.
// * |length| is the length of the window and data.
// Output:
// * |data_windowed| is the windowed data.
static void Windowing(const float* window,
const float* data,
int length,
float* data_windowed) {
int i;
for (i = 0; i < length; ++i) {
data_windowed[i] = window[i] * data[i];
}
}
int WebRtcNs_AnalyzeCore(NSinst_t* inst, float* speechFrame) {
int i;
const int kStartBand = 5; // Skip first frequency bins during estimation.
@ -861,9 +879,7 @@ int WebRtcNs_AnalyzeCore(NSinst_t* inst, float* speechFrame) {
UpdateBuffer(speechFrame, inst->blockLen, inst->anaLen, inst->analyzeBuf);
// windowing
for (i = 0; i < inst->anaLen; i++) {
winData[i] = inst->window[i] * inst->analyzeBuf[i];
}
Windowing(inst->window, inst->analyzeBuf, inst->anaLen, winData);
energy = Energy(winData, inst->anaLen);
if (energy == 0.0) {
// we want to avoid updating statistics in this case:
@ -1144,9 +1160,7 @@ int WebRtcNs_ProcessCore(NSinst_t* inst,
}
// windowing
for (i = 0; i < inst->anaLen; i++) {
winData[i] = inst->window[i] * inst->dataBuf[i];
}
Windowing(inst->window, inst->dataBuf, inst->anaLen, winData);
energy1 = Energy(winData, inst->anaLen);
if (energy1 == 0.0) {
// synthesize the special case of zero input
@ -1283,9 +1297,11 @@ int WebRtcNs_ProcessCore(NSinst_t* inst,
(1.f - inst->priorSpeechProb) * factor2;
} // out of inst->gainmap==1
Windowing(inst->window, winData, inst->anaLen, winData);
// synthesis
for (i = 0; i < inst->anaLen; i++) {
inst->syntBuf[i] += factor * inst->window[i] * winData[i];
inst->syntBuf[i] += factor * winData[i];
}
// read out fully processed segment
for (i = inst->windShift; i < inst->blockLen + inst->windShift; i++) {