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sceAudio: ARM optimisation.

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This commit is contained in:
Sacha 2013-10-29 00:16:37 +10:00
parent e0bc0a3bf1
commit 72fd653a31
3 changed files with 33 additions and 25 deletions
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38
Core/HLE/__sceAudio.cpp
View File

@ -63,17 +63,16 @@ bool __gainAudioQueueLock();
void __releaseAcquiredLock();
void __blockForAudioQueueLock();
static inline s16 clamp_s16(int i) {
if (i > 32767)
return 32767;
if (i < -32768)
return -32768;
return i;
}
static inline s16 adjustvolume(s16 sample, int vol) {
return clamp_s16((sample * vol) >> 15);
#ifdef ARM
register int r;
asm volatile("smulwb %0, %1, %2\n\t" \
"ssat %0, #16, %0" \
: "=r"(r) : "r"(vol), "r"(sample));
return r;
#else
return clamp_s16((sample * vol) >> 16);
#endif
}
void hleAudioUpdate(u64 userdata, int cyclesLate) {
@ -205,6 +204,13 @@ u32 __AudioEnqueue(AudioChannel &chan, int chanNum, bool blocking) {
return ret;
}
int leftVol = chan.leftVolume;
int rightVol = chan.rightVolume;
// Possible optimisation: Check if volume is 1<<15 (seems common) in which case volume is ignored
// Remember that maximum volume allowed is 0xFFFFF so left shift is no issue
leftVol <<=1;
rightVol <<=1;
if (chan.format == PSP_AUDIO_FORMAT_STEREO) {
const u32 totalSamples = chan.sampleCount * 2;
@ -222,10 +228,8 @@ u32 __AudioEnqueue(AudioChannel &chan, int chanNum, bool blocking) {
s16 *buf1 = 0, *buf2 = 0;
size_t sz1, sz2;
chan.sampleQueue.pushPointers(totalSamples, &buf1, &sz1, &buf2, &sz2);
int leftVol = chan.leftVolume;
int rightVol = chan.rightVolume;
// TODO: SSE/NEON implementations
// TODO: SSE/NEON (VQDMULH) implementations
for (u32 i = 0; i < sz1; i += 2) {
buf1[i] = adjustvolume(sampleData[i], leftVol);
buf1[i + 1] = adjustvolume(sampleData[i + 1], rightVol);
@ -242,11 +246,11 @@ u32 __AudioEnqueue(AudioChannel &chan, int chanNum, bool blocking) {
} else {
for (u32 i = 0; i < totalSamples; i++) {
s16 sampleL = (s16)Memory::Read_U16(chan.sampleAddress + sizeof(s16) * i);
sampleL = adjustvolume(sampleL, chan.leftVolume);
sampleL = adjustvolume(sampleL, leftVol);
chan.sampleQueue.push(sampleL);
i++;
s16 sampleR = (s16)Memory::Read_U16(chan.sampleAddress + sizeof(s16) * i);
sampleR = adjustvolume(sampleR, chan.rightVolume);
sampleR = adjustvolume(sampleR, rightVol);
chan.sampleQueue.push(sampleR);
}
}
@ -255,8 +259,8 @@ u32 __AudioEnqueue(AudioChannel &chan, int chanNum, bool blocking) {
for (u32 i = 0; i < chan.sampleCount; i++) {
// Expand to stereo
s16 sample = (s16)Memory::Read_U16(chan.sampleAddress + 2 * i);
chan.sampleQueue.push(adjustvolume(sample, chan.leftVolume));
chan.sampleQueue.push(adjustvolume(sample, chan.rightVolume));
chan.sampleQueue.push(adjustvolume(sample, leftVol));
chan.sampleQueue.push(adjustvolume(sample, rightVol));
}
}
return ret;

8
Core/HW/SasAudio.cpp
View File

@ -330,14 +330,6 @@ void SasInstance::SetGrainSize(int newGrainSize) {
resampleBuffer = new s16[grainSize * 4 + 3];
}
static inline s16 clamp_s16(int i) {
if (i > 32767)
return 32767;
if (i < -32768)
return -32768;
return i;
}
void SasVoice::ReadSamples(s16 *output, int numSamples) {
// Read N samples into the resample buffer. Could do either PCM or VAG here.
switch (type) {

12
Globals.h
View File

@ -48,6 +48,18 @@ inline u8 Convert6To8(u8 v)
return (v << 2) | (v >> 4);
}
static inline s16 clamp_s16(int i) {
#ifdef ARM
asm("ssat %0, #16, %1" : "=r"(i) : "r"(i));
#else
if (i > 32767)
return 32767;
if (i < -32768)
return -32768;
#endif
return i;
}
#ifndef DISALLOW_COPY_AND_ASSIGN
#define DISALLOW_COPY_AND_ASSIGN(t) \
private: \