diff options
Diffstat (limited to 'src/pcm/PcmMix.cxx')
| -rw-r--r-- | src/pcm/PcmMix.cxx | 119 |
1 files changed, 71 insertions, 48 deletions
diff --git a/src/pcm/PcmMix.cxx b/src/pcm/PcmMix.cxx index 001794061..d21b5f04b 100644 --- a/src/pcm/PcmMix.cxx +++ b/src/pcm/PcmMix.cxx @@ -1,5 +1,5 @@ /* - * Copyright (C) 2003-2013 The Music Player Daemon Project + * Copyright (C) 2003-2014 The Music Player Daemon Project * http://www.musicpd.org * * This program is free software; you can redistribute it and/or modify @@ -19,42 +19,56 @@ #include "config.h" #include "PcmMix.hxx" -#include "PcmVolume.hxx" +#include "Volume.hxx" #include "PcmUtils.hxx" #include "AudioFormat.hxx" +#include "Traits.hxx" +#include "util/Clamp.hxx" +#include "PcmDither.cxx" // including the .cxx file to get inlined templates + +#include <assert.h> #include <math.h> -template<typename T, typename U, unsigned bits> -static T -PcmAddVolume(T _a, T _b, int volume1, int volume2) +template<SampleFormat F, class Traits=SampleTraits<F>> +static typename Traits::value_type +PcmAddVolume(PcmDither &dither, + typename Traits::value_type _a, typename Traits::value_type _b, + int volume1, int volume2) { - U a(_a), b(_b); - - U c = ((a * volume1 + b * volume2) + - pcm_volume_dither() + PCM_VOLUME_1 / 2) - / PCM_VOLUME_1; + typename Traits::long_type a(_a), b(_b); + typename Traits::long_type c(a * volume1 + b * volume2); - return PcmClamp<T, U, bits>(c); + return dither.DitherShift<typename Traits::long_type, + Traits::BITS + PCM_VOLUME_BITS, + Traits::BITS>(c); } -template<typename T, typename U, unsigned bits> +template<SampleFormat F, class Traits=SampleTraits<F>> static void -PcmAddVolume(T *a, const T *b, unsigned n, int volume1, int volume2) +PcmAddVolume(PcmDither &dither, + typename Traits::pointer_type a, + typename Traits::const_pointer_type b, + size_t n, int volume1, int volume2) { for (size_t i = 0; i != n; ++i) - a[i] = PcmAddVolume<T, U, bits>(a[i], b[i], volume1, volume2); + a[i] = PcmAddVolume<F, Traits>(dither, a[i], b[i], + volume1, volume2); } -template<typename T, typename U, unsigned bits> +template<SampleFormat F, class Traits=SampleTraits<F>> static void -PcmAddVolumeVoid(void *a, const void *b, size_t size, int volume1, int volume2) +PcmAddVolumeVoid(PcmDither &dither, + void *a, const void *b, size_t size, int volume1, int volume2) { - constexpr size_t sample_size = sizeof(T); + constexpr size_t sample_size = Traits::SAMPLE_SIZE; assert(size % sample_size == 0); - PcmAddVolume<T, U, bits>((T *)a, (const T *)b, size / sample_size, - volume1, volume2); + PcmAddVolume<F, Traits>(dither, + typename Traits::pointer_type(a), + typename Traits::const_pointer_type(b), + size / sample_size, + volume1, volume2); } static void @@ -72,7 +86,7 @@ pcm_add_vol_float(float *buffer1, const float *buffer2, } static bool -pcm_add_vol(void *buffer1, const void *buffer2, size_t size, +pcm_add_vol(PcmDither &dither, void *buffer1, const void *buffer2, size_t size, int vol1, int vol2, SampleFormat format) { @@ -83,23 +97,27 @@ pcm_add_vol(void *buffer1, const void *buffer2, size_t size, return false; case SampleFormat::S8: - PcmAddVolumeVoid<int8_t, int32_t, 8>(buffer1, buffer2, size, - vol1, vol2); + PcmAddVolumeVoid<SampleFormat::S8>(dither, + buffer1, buffer2, size, + vol1, vol2); return true; case SampleFormat::S16: - PcmAddVolumeVoid<int16_t, int32_t, 16>(buffer1, buffer2, size, - vol1, vol2); + PcmAddVolumeVoid<SampleFormat::S16>(dither, + buffer1, buffer2, size, + vol1, vol2); return true; case SampleFormat::S24_P32: - PcmAddVolumeVoid<int32_t, int64_t, 24>(buffer1, buffer2, size, - vol1, vol2); + PcmAddVolumeVoid<SampleFormat::S24_P32>(dither, + buffer1, buffer2, size, + vol1, vol2); return true; case SampleFormat::S32: - PcmAddVolumeVoid<int32_t, int64_t, 32>(buffer1, buffer2, size, - vol1, vol2); + PcmAddVolumeVoid<SampleFormat::S32>(dither, + buffer1, buffer2, size, + vol1, vol2); return true; case SampleFormat::FLOAT: @@ -114,30 +132,35 @@ pcm_add_vol(void *buffer1, const void *buffer2, size_t size, gcc_unreachable(); } -template<typename T, typename U, unsigned bits> -static T -PcmAdd(T _a, T _b) +template<SampleFormat F, class Traits=SampleTraits<F>> +static typename Traits::value_type +PcmAdd(typename Traits::value_type _a, typename Traits::value_type _b) { - U a(_a), b(_b); - return PcmClamp<T, U, bits>(a + b); + typename Traits::sum_type a(_a), b(_b); + + return PcmClamp<F, Traits>(a + b); } -template<typename T, typename U, unsigned bits> +template<SampleFormat F, class Traits=SampleTraits<F>> static void -PcmAdd(T *a, const T *b, unsigned n) +PcmAdd(typename Traits::pointer_type a, + typename Traits::const_pointer_type b, + size_t n) { for (size_t i = 0; i != n; ++i) - a[i] = PcmAdd<T, U, bits>(a[i], b[i]); + a[i] = PcmAdd<F, Traits>(a[i], b[i]); } -template<typename T, typename U, unsigned bits> +template<SampleFormat F, class Traits=SampleTraits<F>> static void PcmAddVoid(void *a, const void *b, size_t size) { - constexpr size_t sample_size = sizeof(T); + constexpr size_t sample_size = Traits::SAMPLE_SIZE; assert(size % sample_size == 0); - PcmAdd<T, U, bits>((T *)a, (const T *)b, size / sample_size); + PcmAdd<F, Traits>(typename Traits::pointer_type(a), + typename Traits::const_pointer_type(b), + size / sample_size); } static void @@ -162,19 +185,19 @@ pcm_add(void *buffer1, const void *buffer2, size_t size, return false; case SampleFormat::S8: - PcmAddVoid<int8_t, int32_t, 8>(buffer1, buffer2, size); + PcmAddVoid<SampleFormat::S8>(buffer1, buffer2, size); return true; case SampleFormat::S16: - PcmAddVoid<int16_t, int32_t, 16>(buffer1, buffer2, size); + PcmAddVoid<SampleFormat::S16>(buffer1, buffer2, size); return true; case SampleFormat::S24_P32: - PcmAddVoid<int32_t, int64_t, 24>(buffer1, buffer2, size); + PcmAddVoid<SampleFormat::S24_P32>(buffer1, buffer2, size); return true; case SampleFormat::S32: - PcmAddVoid<int32_t, int64_t, 32>(buffer1, buffer2, size); + PcmAddVoid<SampleFormat::S32>(buffer1, buffer2, size); return true; case SampleFormat::FLOAT: @@ -188,10 +211,9 @@ pcm_add(void *buffer1, const void *buffer2, size_t size, } bool -pcm_mix(void *buffer1, const void *buffer2, size_t size, +pcm_mix(PcmDither &dither, void *buffer1, const void *buffer2, size_t size, SampleFormat format, float portion1) { - int vol1; float s; /* portion1 is between 0.0 and 1.0 for crossfading, MixRamp uses -1 @@ -202,8 +224,9 @@ pcm_mix(void *buffer1, const void *buffer2, size_t size, s = sin(M_PI_2 * portion1); s *= s; - vol1 = s * PCM_VOLUME_1 + 0.5; - vol1 = vol1 > PCM_VOLUME_1 ? PCM_VOLUME_1 : (vol1 < 0 ? 0 : vol1); + int vol1 = s * PCM_VOLUME_1S + 0.5; + vol1 = Clamp<int>(vol1, 0, PCM_VOLUME_1S); - return pcm_add_vol(buffer1, buffer2, size, vol1, PCM_VOLUME_1 - vol1, format); + return pcm_add_vol(dither, buffer1, buffer2, size, + vol1, PCM_VOLUME_1S - vol1, format); } |