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pcm/Volume: convert i386 code to template specialization

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This commit is contained in:
Max Kellermann 2013-12-23 10:07:28 +01:00
parent 4a62cd4ad8
commit 7be2abe6b5
1 changed files with 43 additions and 43 deletions
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86
src/pcm/Volume.cxx
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@ -40,31 +40,8 @@ pcm_volume_sample(typename Traits::value_type _sample,
return PcmClamp<F, Traits>(sample);
}
template<SampleFormat F, class Traits=SampleTraits<F>>
static void
pcm_volume_change(typename Traits::pointer_type buffer,
typename Traits::const_pointer_type end,
int volume)
{
while (buffer < end) {
const auto sample = *buffer;
*buffer++ = pcm_volume_sample<F, Traits>(sample, volume);
}
}
static void
pcm_volume_change_8(int8_t *buffer, const int8_t *end, int volume)
{
pcm_volume_change<SampleFormat::S8>(buffer, end, volume);
}
static void
pcm_volume_change_16(int16_t *buffer, const int16_t *end, int volume)
{
pcm_volume_change<SampleFormat::S16>(buffer, end, volume);
}
#ifdef __i386__
/**
* Optimized volume function for i386. Use the EDX:EAX 2*32 bit
* multiplication result instead of emulating 64 bit multiplication.
@ -93,37 +70,60 @@ pcm_volume_sample_24(int32_t sample, int32_t volume, gcc_unused int32_t dither)
return result;
}
template<>
inline int32_t
pcm_volume_sample<SampleFormat::S24_P32,
SampleTraits<SampleFormat::S24_P32>>(int32_t sample,
int volume)
{
return pcm_volume_sample_24(sample, volume, pcm_volume_dither());
}
template<>
inline int32_t
pcm_volume_sample<SampleFormat::S32,
SampleTraits<SampleFormat::S32>>(int32_t sample, int volume)
{
return pcm_volume_sample_24(sample, volume, pcm_volume_dither());
}
#endif
template<SampleFormat F, class Traits=SampleTraits<F>>
static void
pcm_volume_change(typename Traits::pointer_type buffer,
typename Traits::const_pointer_type end,
int volume)
{
while (buffer < end) {
const auto sample = *buffer;
*buffer++ = pcm_volume_sample<F, Traits>(sample, volume);
}
}
static void
pcm_volume_change_8(int8_t *buffer, const int8_t *end, int volume)
{
pcm_volume_change<SampleFormat::S8>(buffer, end, volume);
}
static void
pcm_volume_change_16(int16_t *buffer, const int16_t *end, int volume)
{
pcm_volume_change<SampleFormat::S16>(buffer, end, volume);
}
static void
pcm_volume_change_24(int32_t *buffer, const int32_t *end, int volume)
{
#ifdef __i386__
while (buffer < end) {
/* assembly version for i386 */
int32_t sample = *buffer;
sample = pcm_volume_sample_24(sample, volume,
pcm_volume_dither());
}
#else
pcm_volume_change<SampleFormat::S24_P32>(buffer, end, volume);
#endif
}
static void
pcm_volume_change_32(int32_t *buffer, const int32_t *end, int volume)
{
#ifdef __i386__
while (buffer < end) {
/* assembly version for i386 */
int32_t sample = *buffer;
*buffer++ = pcm_volume_sample_24(sample, volume, 0);
}
#else
pcm_volume_change<SampleFormat::S32>(buffer, end, volume);
#endif
}
static void