diff options
Diffstat (limited to 'src/pcm/PcmChannels.cxx')
| -rw-r--r-- | src/pcm/PcmChannels.cxx | 297 |
1 files changed, 94 insertions, 203 deletions
diff --git a/src/pcm/PcmChannels.cxx b/src/pcm/PcmChannels.cxx index eb69985c1..276f31045 100644 --- a/src/pcm/PcmChannels.cxx +++ b/src/pcm/PcmChannels.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 @@ -20,7 +20,9 @@ #include "config.h" #include "PcmChannels.hxx" #include "PcmBuffer.hxx" -#include "PcmUtils.hxx" +#include "Traits.hxx" +#include "AudioFormat.hxx" +#include "util/ConstBuffer.hxx" #include <assert.h> @@ -37,254 +39,143 @@ MonoToStereo(D dest, S src, S end) } -static void -pcm_convert_channels_16_2_to_1(int16_t *gcc_restrict dest, - const int16_t *gcc_restrict src, - const int16_t *gcc_restrict src_end) +template<SampleFormat F, class Traits=SampleTraits<F>> +static typename Traits::value_type +StereoToMono(typename Traits::value_type _a, + typename Traits::value_type _b) { - while (src < src_end) { - int32_t a = *src++, b = *src++; + typename Traits::sum_type a(_a); + typename Traits::sum_type b(_b); - *dest++ = (a + b) / 2; - } + return typename Traits::value_type((a + b) / 2); } -static void -pcm_convert_channels_16_n_to_2(int16_t *gcc_restrict dest, - unsigned src_channels, - const int16_t *gcc_restrict src, - const int16_t *gcc_restrict src_end) +template<SampleFormat F, class Traits=SampleTraits<F>> +static typename Traits::pointer_type +StereoToMono(typename Traits::pointer_type dest, + typename Traits::const_pointer_type src, + typename Traits::const_pointer_type end) { - unsigned c; - - assert(src_channels > 0); - - while (src < src_end) { - int32_t sum = 0; - int16_t value; - - for (c = 0; c < src_channels; ++c) - sum += *src++; - value = sum / (int)src_channels; + while (src != end) { + const auto a = *src++; + const auto b = *src++; - /* XXX this is actually only mono ... */ - *dest++ = value; - *dest++ = value; + *dest++ = StereoToMono<F, Traits>(a, b); } -} - -const int16_t * -pcm_convert_channels_16(PcmBuffer &buffer, - unsigned dest_channels, - unsigned src_channels, const int16_t *src, - size_t src_size, size_t *dest_size_r) -{ - assert(src_size % (sizeof(*src) * src_channels) == 0); - - size_t dest_size = src_size / src_channels * dest_channels; - *dest_size_r = dest_size; - - int16_t *dest = (int16_t *)buffer.Get(dest_size); - const int16_t *src_end = pcm_end_pointer(src, src_size); - - if (src_channels == 1 && dest_channels == 2) - MonoToStereo(dest, src, src_end); - else if (src_channels == 2 && dest_channels == 1) - pcm_convert_channels_16_2_to_1(dest, src, src_end); - else if (dest_channels == 2) - pcm_convert_channels_16_n_to_2(dest, src_channels, src, - src_end); - else - return nullptr; return dest; } -static void -pcm_convert_channels_24_2_to_1(int32_t *gcc_restrict dest, - const int32_t *gcc_restrict src, - const int32_t *gcc_restrict src_end) -{ - while (src < src_end) { - int32_t a = *src++, b = *src++; - - *dest++ = (a + b) / 2; - } -} - -static void -pcm_convert_channels_24_n_to_2(int32_t *gcc_restrict dest, - unsigned src_channels, - const int32_t *gcc_restrict src, - const int32_t *gcc_restrict src_end) +template<SampleFormat F, class Traits=SampleTraits<F>> +static typename Traits::pointer_type +NToStereo(typename Traits::pointer_type dest, + unsigned src_channels, + typename Traits::const_pointer_type src, + typename Traits::const_pointer_type end) { - unsigned c; + assert((end - src) % src_channels == 0); - assert(src_channels > 0); - - while (src < src_end) { - int32_t sum = 0; - int32_t value; - - for (c = 0; c < src_channels; ++c) + while (src != end) { + typename Traits::sum_type sum = *src++; + for (unsigned c = 1; c < src_channels; ++c) sum += *src++; - value = sum / (int)src_channels; - /* XXX this is actually only mono ... */ + typename Traits::value_type value(sum / int(src_channels)); + + /* TODO: this is actually only mono ... */ *dest++ = value; *dest++ = value; } -} - -const int32_t * -pcm_convert_channels_24(PcmBuffer &buffer, - unsigned dest_channels, - unsigned src_channels, const int32_t *src, - size_t src_size, size_t *dest_size_r) -{ - assert(src_size % (sizeof(*src) * src_channels) == 0); - - size_t dest_size = src_size / src_channels * dest_channels; - *dest_size_r = dest_size; - - int32_t *dest = (int32_t *)buffer.Get(dest_size); - const int32_t *src_end = (const int32_t *) - pcm_end_pointer(src, src_size); - - if (src_channels == 1 && dest_channels == 2) - MonoToStereo(dest, src, src_end); - else if (src_channels == 2 && dest_channels == 1) - pcm_convert_channels_24_2_to_1(dest, src, src_end); - else if (dest_channels == 2) - pcm_convert_channels_24_n_to_2(dest, src_channels, src, - src_end); - else - return nullptr; return dest; } -static void -pcm_convert_channels_32_2_to_1(int32_t *gcc_restrict dest, - const int32_t *gcc_restrict src, - const int32_t *gcc_restrict src_end) -{ - while (src < src_end) { - int64_t a = *src++, b = *src++; - - *dest++ = (a + b) / 2; - } -} - -static void -pcm_convert_channels_32_n_to_2(int32_t *dest, - unsigned src_channels, const int32_t *src, - const int32_t *src_end) +template<SampleFormat F, class Traits=SampleTraits<F>> +static typename Traits::pointer_type +NToM(typename Traits::pointer_type dest, + unsigned dest_channels, + unsigned src_channels, + typename Traits::const_pointer_type src, + typename Traits::const_pointer_type end) { - unsigned c; + assert((end - src) % src_channels == 0); - assert(src_channels > 0); - - while (src < src_end) { - int64_t sum = 0; - int32_t value; - - for (c = 0; c < src_channels; ++c) + while (src != end) { + typename Traits::sum_type sum = *src++; + for (unsigned c = 1; c < src_channels; ++c) sum += *src++; - value = sum / (int64_t)src_channels; - /* XXX this is actually only mono ... */ - *dest++ = value; - *dest++ = value; + typename Traits::value_type value(sum / int(src_channels)); + + /* TODO: this is actually only mono ... */ + for (unsigned c = 0; c < dest_channels; ++c) + *dest++ = value; } + + return dest; } -const int32_t * -pcm_convert_channels_32(PcmBuffer &buffer, - unsigned dest_channels, - unsigned src_channels, const int32_t *src, - size_t src_size, size_t *dest_size_r) +template<SampleFormat F, class Traits=SampleTraits<F>> +static ConstBuffer<typename Traits::value_type> +ConvertChannels(PcmBuffer &buffer, + unsigned dest_channels, + unsigned src_channels, + ConstBuffer<typename Traits::value_type> src) { - assert(src_size % (sizeof(*src) * src_channels) == 0); - - size_t dest_size = src_size / src_channels * dest_channels; - *dest_size_r = dest_size; + assert(src.size % src_channels == 0); - int32_t *dest = (int32_t *)buffer.Get(dest_size); - const int32_t *src_end = (const int32_t *) - pcm_end_pointer(src, src_size); + const size_t dest_size = src.size / src_channels * dest_channels; + auto dest = buffer.GetT<typename Traits::value_type>(dest_size); if (src_channels == 1 && dest_channels == 2) - MonoToStereo(dest, src, src_end); + MonoToStereo(dest, src.begin(), src.end()); else if (src_channels == 2 && dest_channels == 1) - pcm_convert_channels_32_2_to_1(dest, src, src_end); + StereoToMono<F>(dest, src.begin(), src.end()); else if (dest_channels == 2) - pcm_convert_channels_32_n_to_2(dest, src_channels, src, - src_end); + NToStereo<F>(dest, src_channels, src.begin(), src.end()); else - return nullptr; + NToM<F>(dest, dest_channels, + src_channels, src.begin(), src.end()); - return dest; + return { dest, dest_size }; } -static void -pcm_convert_channels_float_2_to_1(float *gcc_restrict dest, - const float *gcc_restrict src, - const float *gcc_restrict src_end) +ConstBuffer<int16_t> +pcm_convert_channels_16(PcmBuffer &buffer, + unsigned dest_channels, + unsigned src_channels, + ConstBuffer<int16_t> src) { - while (src < src_end) { - double a = *src++, b = *src++; - - *dest++ = (a + b) / 2; - } + return ConvertChannels<SampleFormat::S16>(buffer, dest_channels, + src_channels, src); } -static void -pcm_convert_channels_float_n_to_2(float *dest, - unsigned src_channels, const float *src, - const float *src_end) +ConstBuffer<int32_t> +pcm_convert_channels_24(PcmBuffer &buffer, + unsigned dest_channels, + unsigned src_channels, + ConstBuffer<int32_t> src) { - unsigned c; - - assert(src_channels > 0); - - while (src < src_end) { - double sum = 0; - float value; - - for (c = 0; c < src_channels; ++c) - sum += *src++; - value = sum / (double)src_channels; + return ConvertChannels<SampleFormat::S24_P32>(buffer, dest_channels, + src_channels, src); +} - /* XXX this is actually only mono ... */ - *dest++ = value; - *dest++ = value; - } +ConstBuffer<int32_t> +pcm_convert_channels_32(PcmBuffer &buffer, + unsigned dest_channels, + unsigned src_channels, + ConstBuffer<int32_t> src) +{ + return ConvertChannels<SampleFormat::S32>(buffer, dest_channels, + src_channels, src); } -const float * +ConstBuffer<float> pcm_convert_channels_float(PcmBuffer &buffer, unsigned dest_channels, - unsigned src_channels, const float *src, - size_t src_size, size_t *dest_size_r) + unsigned src_channels, + ConstBuffer<float> src) { - assert(src_size % (sizeof(*src) * src_channels) == 0); - - size_t dest_size = src_size / src_channels * dest_channels; - *dest_size_r = dest_size; - - float *dest = (float *)buffer.Get(dest_size); - const float *src_end = (const float *)pcm_end_pointer(src, src_size); - - if (src_channels == 1 && dest_channels == 2) - MonoToStereo(dest, src, src_end); - else if (src_channels == 2 && dest_channels == 1) - pcm_convert_channels_float_2_to_1(dest, src, src_end); - else if (dest_channels == 2) - pcm_convert_channels_float_n_to_2(dest, src_channels, src, - src_end); - else - return nullptr; - - return dest; + return ConvertChannels<SampleFormat::FLOAT>(buffer, dest_channels, + src_channels, src); } |