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audiocommon: remove 1:1 interpolation

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The usual one is 32->48 khz interpolation. So there is no need in a special 1:1 interpolation only for performance.
This commit is contained in:
degasus 2014-02-06 06:38:04 +01:00
parent 4a5ef06f71
commit 2956ffa5be
1 changed files with 20 additions and 48 deletions
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28
Source/Core/AudioCommon/Mixer.cpp
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@ -56,33 +56,6 @@ unsigned int CMixer::Mix(short* samples, unsigned int numSamples)
if (m_AIplaying) { if (m_AIplaying) {
numLeft = (numLeft > numSamples) ? numSamples : numLeft; numLeft = (numLeft > numSamples) ? numSamples : numLeft;
if (AudioInterface::GetAIDSampleRate() == m_sampleRate) // (1:1)
{
#if _M_SSE >= 0x301
if (cpu_info.bSSSE3 && !((numLeft * 2) % 8))
{
static const __m128i sr_mask =
_mm_set_epi32(0x0C0D0E0FL, 0x08090A0BL,
0x04050607L, 0x00010203L);
for (unsigned int i = 0; i < numLeft * 2; i += 8)
{
_mm_storeu_si128((__m128i *)&samples[i], _mm_shuffle_epi8(_mm_loadu_si128((__m128i *)&m_buffer[(indexR + i) & INDEX_MASK]), sr_mask));
}
}
else
#endif
{
for (unsigned int i = 0; i < numLeft * 2; i+=2)
{
samples[i] = Common::swap16(m_buffer[(indexR + i + 1) & INDEX_MASK]);
samples[i+1] = Common::swap16(m_buffer[(indexR + i) & INDEX_MASK]);
}
}
indexR += numLeft * 2;
}
else //linear interpolation
{
//render numleft sample pairs to samples[] //render numleft sample pairs to samples[]
//advance indexR with sample position //advance indexR with sample position
//remember fractional offset //remember fractional offset
@ -109,7 +82,6 @@ unsigned int CMixer::Mix(short* samples, unsigned int numSamples)
indexR += 2 * (u16)(frac >> 16); indexR += 2 * (u16)(frac >> 16);
frac &= 0xffff; frac &= 0xffff;
} }
}
} else { } else {
numLeft = 0; numLeft = 0;