diff --git a/GPLv3.txt b/GPLv3.txt new file mode 100644 index 0000000..94a9ed0 --- /dev/null +++ b/GPLv3.txt @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. By contrast, +the GNU General Public License is intended to guarantee your freedom to +share and change all versions of a program--to make sure it remains free +software for all its users. We, the Free Software Foundation, use the +GNU General Public License for most of our software; it applies also to +any other work released this way by its authors. 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If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/Tupfile b/Tupfile new file mode 100644 index 0000000..41a19c6 --- /dev/null +++ b/Tupfile @@ -0,0 +1,18 @@ +.gitignore + +ifndef CONFIG_CC + error No config specified. Please try e.g. `tup variant config/debug.config`, then run tup again. +endif + +LIBS = lv2 fftw3f +CFLAGS = @(CFLAGS) `@(PKGCONFIG) --cflags $(LIBS)` +LFLAGS = @(LFLAGS) `@(PKGCONFIG) --libs $(LIBS)` + +!cc = |> @(CC) -c %f -o %o $(CFLAGS) |> %B.o +!so = |> @(CC) -shared %f -o %o $(CFLAGS) $(LFLAGS) |> + +: foreach src/*.c |> !cc |> obj/%B.o {objs} +: {objs} |> !so |> intersect.lv2/intersect.@(EXT) + +: foreach metadata/*.ttl |> cp %f %o |> intersect.lv2/%b +: foreach metadata/*.in |> tup varsed %f %o |> intersect.lv2/%B diff --git a/Tupfile.ini b/Tupfile.ini new file mode 100644 index 0000000..e69de29 diff --git a/config/debug.config b/config/debug.config new file mode 100644 index 0000000..41cc0af --- /dev/null +++ b/config/debug.config @@ -0,0 +1,5 @@ +CONFIG_CC=clang +CONFIG_PKGCONFIG=pkg-config +CONFIG_CFLAGS=-g -fPIC +CONFIG_LFLAGS= +CONFIG_EXT=so diff --git a/config/release.config b/config/release.config new file mode 100644 index 0000000..464ee3e --- /dev/null +++ b/config/release.config @@ -0,0 +1,5 @@ +CONFIG_CC=clang +CONFIG_PKGCONFIG=pkg-config +CONFIG_CFLAGS=-O3 -flto -fPIC +CONFIG_LFLAGS=-s +CONFIG_EXT=so diff --git a/config/win32.config b/config/win32.config new file mode 100644 index 0000000..cef4742 --- /dev/null +++ b/config/win32.config @@ -0,0 +1,5 @@ +CONFIG_CC=i686-w64-mingw32-gcc +CONFIG_PKGCONFIG=i686-w64-mingw32-pkg-config --static +CONFIG_CFLAGS=-O3 -flto +CONFIG_LFLAGS=-static -s +CONFIG_EXT=dll diff --git a/config/win64.config b/config/win64.config new file mode 100644 index 0000000..7c216b2 --- /dev/null +++ b/config/win64.config @@ -0,0 +1,5 @@ +CONFIG_CC=x86_64-w64-mingw32-gcc +CONFIG_PKGCONFIG=x86_64-w64-mingw32-pkg-config --static +CONFIG_CFLAGS=-O3 -flto +CONFIG_LFLAGS=-static -s +CONFIG_EXT=dll diff --git a/intersect b/intersect new file mode 100755 index 0000000..f09fea9 --- /dev/null +++ b/intersect @@ -0,0 +1,2 @@ +#!/usr/bin/env bash +lv2proc "$@" 'https://sami.boukortt.com/plugins/intersect#Upmix' diff --git a/metadata/intersect.ttl b/metadata/intersect.ttl new file mode 100644 index 0000000..0ba4921 --- /dev/null +++ b/metadata/intersect.ttl @@ -0,0 +1,134 @@ +@prefix doap: . +@prefix foaf: . +@prefix lv2: . +@prefix pg: . +@prefix pprops: . +@prefix rdf: . +@prefix rdfs: . +@prefix units: . + + + a foaf:Person ; + foaf:name "Sami Boukortt" ; + foaf:mbox . + + + a lv2:Project ; + doap:license ; + doap:name "Intersect" ; + doap:programming-language "C" ; + doap:developer ; + doap:maintainer . + +_:fft_window_size + a lv2:InputPort, lv2:ControlPort ; + lv2:index 0 ; + lv2:symbol "fft_window_size" ; + lv2:name "FFT window size" ; + lv2:portProperty lv2:integer, pprops:logarithmic, pprops:notAutomatic ; + units:unit units:frame ; + lv2:minimum 1 ; + lv2:maximum 65536 ; + lv2:default 16384 . + +_:overlap_factor + a lv2:InputPort, lv2:ControlPort ; + lv2:index 1 ; + lv2:symbol "overlap_factor" ; + lv2:name "Overlap factor" ; + lv2:portProperty lv2:integer, pprops:logarithmic, pprops:notAutomatic ; + lv2:minimum 1 ; + lv2:maximum 65536 ; + lv2:default 512 . + +_:input + a pg:InputGroup ; + lv2:symbol "input" . + +_:input_left + a lv2:InputPort, lv2:AudioPort ; + lv2:index 2 ; + lv2:symbol "input_left" ; + lv2:name "Input (left channel)" ; + pg:group _:input ; + lv2:designation pg:left . + +_:input_right + a lv2:InputPort, lv2:AudioPort ; + lv2:index 3 ; + lv2:symbol "input_right" ; + lv2:name "Input (right channel)" ; + pg:group _:input ; + lv2:designation pg:right . + +_:latency + a lv2:OutputPort, lv2:ControlPort ; + lv2:index 4 ; + lv2:symbol "latency" ; + lv2:name "Latency" ; + lv2:portProperty lv2:reportsLatency . + +_:output + a pg:OutputGroup ; + lv2:symbol "output" ; + pg:source _:input . + +_:output_left + a lv2:OutputPort, lv2:AudioPort ; + lv2:index 5 ; + lv2:symbol "output_left" ; + lv2:name "Output (left)" ; + pg:group _:output ; + lv2:designation pg:left . + +_:output_right + a lv2:OutputPort, lv2:AudioPort ; + lv2:index 6 ; + lv2:symbol "output_right" ; + lv2:name "Output (right)" ; + pg:group _:output ; + lv2:designation pg:right . + + + a lv2:Plugin, lv2:SpatialPlugin ; + lv2:project ; + doap:name "Channel Intersection" ; + lv2:port + _:fft_window_size, _:overlap_factor, + _:input_left, _:input_right, + _:latency, + [ + a lv2:OutputPort, lv2:AudioPort ; + lv2:index 5 ; + lv2:symbol "output" ; + lv2:name "Output" ; + pg:group _:output ; + lv2:designation pg:center ; + ] . + + + a lv2:Plugin, lv2:SpatialPlugin ; + lv2:project ; + doap:name "Channel Symmetric Difference" ; + lv2:port + _:fft_window_size, _:overlap_factor, + _:input_left, _:input_right, + _:latency, + _:output_left, _:output_right . + + + a lv2:Plugin, lv2:SpatialPlugin ; + lv2:project ; + doap:name "2.0 -> 3.0 Upmix" ; + lv2:port + _:fft_window_size, _:overlap_factor, + _:input_left, _:input_right, + _:latency, + _:output_left, _:output_right, [ + a lv2:OutputPort, lv2:AudioPort ; + lv2:index 7 ; + lv2:symbol "output_center" ; + lv2:name "Output (center)" ; + pg:group _:output ; + lv2:designation pg:center ; + ] . diff --git a/metadata/manifest.ttl.in b/metadata/manifest.ttl.in new file mode 100644 index 0000000..d1e0466 --- /dev/null +++ b/metadata/manifest.ttl.in @@ -0,0 +1,17 @@ +@prefix lv2: . +@prefix rdfs: . + + + a lv2:Plugin ; + lv2:binary ; + rdfs:seeAlso . + + + a lv2:Plugin ; + lv2:binary ; + rdfs:seeAlso . + + + a lv2:Plugin ; + lv2:binary ; + rdfs:seeAlso . diff --git a/src/intersect.c b/src/intersect.c new file mode 100644 index 0000000..5292f1b --- /dev/null +++ b/src/intersect.c @@ -0,0 +1,332 @@ +/* Copyright 2015 Sami Boukortt + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . +*/ + +#define INTERSECT_URI "https://sami.boukortt.com/plugins/intersect" + +#include +#include +#include +#include +#include "lv2/lv2plug.in/ns/lv2core/lv2.h" +#define min(a,b) ((a) < (b) ? (a) : (b)) +#define max(a,b) ((a) > (b) ? (a) : (b)) + +#ifdef _WIN32 + #define DLLEXPORT __declspec(dllexport) +#else + #define DLLEXPORT +#endif + +enum { + FFT_SIZE, + OVERLAP_FACTOR, + INPUT_CHANNEL_LEFT, + INPUT_CHANNEL_RIGHT, + LATENCY, + OUTPUT_CHANNEL_LEFT, + OUTPUT_CHANNEL_RIGHT, + OUTPUT_CHANNEL_CENTER, +}; + +enum { + INTERSECT, + SYMMETRIC_DIFFERENCE, + UPMIX, +} +typedef Effect; + +enum {LEFT, RIGHT, CENTER}; + +struct { + float *input[2], *output[3]; + + float *fft_size_hint, *overlap_factor_hint; + float *latency; + + uint32_t fft_size, overlap_factor, fft_jump_size; + float normalization_factor; + + /* deviation from the “stable state” where there are `fft_jump_size` + samples in `output_buffer` and `fft_size` samples in `input_buffer` + + When `deviation` = `fft_jump_size`, the output buffer is empty and + the input buffers are full. Time to refill! + */ + uint32_t deviation; + + float *input_buffer[2], + *ifft_result, + *output_buffer[3]; + + fftwf_complex *transformed[2], + *pre_output; + + fftwf_plan plan_r2c[2], + plan_c2r; +} +typedef Intersect; + +static LV2_Handle intersect_instantiate(const LV2_Descriptor *descriptor, + double sample_rate, + const char *bundle_path, + const LV2_Feature *const *features) +{ + return calloc(1, sizeof(Intersect)); +} + +static void intersect_cleanup(LV2_Handle handle) { + free(handle); +} + +static void intersect_activate(LV2_Handle handle) { + Intersect *intersect = handle; + int i; + + intersect->fft_size = max(1, *intersect->fft_size_hint + .5f); + if (intersect->fft_size % 2 != 0) { + ++intersect->fft_size; + } + intersect->overlap_factor = max(1, min(intersect->fft_size, *intersect->overlap_factor_hint + .5f)); + intersect->fft_jump_size = intersect->fft_size / intersect->overlap_factor; + intersect->normalization_factor = 1.f / (intersect->fft_size * intersect->overlap_factor); + + intersect->deviation = 0; + + intersect->input_buffer[LEFT] = fftwf_alloc_real(intersect->fft_size); + intersect->input_buffer[RIGHT] = fftwf_alloc_real(intersect->fft_size); + + intersect->ifft_result = fftwf_alloc_real(intersect->fft_size); + + intersect->output_buffer[LEFT] = calloc(intersect->fft_jump_size, sizeof(float)); + intersect->output_buffer[RIGHT] = calloc(intersect->fft_jump_size, sizeof(float)); + intersect->output_buffer[CENTER] = calloc(intersect->fft_size, sizeof(float)); + + intersect->transformed[LEFT] = fftwf_alloc_complex(intersect->fft_size / 2 + 1); + intersect->transformed[RIGHT] = fftwf_alloc_complex(intersect->fft_size / 2 + 1); + intersect->pre_output = fftwf_alloc_complex(intersect->fft_size / 2 + 1); + + for (i = 0; i < 2; ++i) { + memset(intersect->input_buffer[i], 0, intersect->fft_size * sizeof(float)); + intersect->plan_r2c[i] = fftwf_plan_dft_r2c_1d(intersect->fft_size, intersect->input_buffer[i], intersect->transformed[i], FFTW_MEASURE | FFTW_DESTROY_INPUT); + } + intersect->plan_c2r = fftwf_plan_dft_c2r_1d(intersect->fft_size, intersect->pre_output, intersect->ifft_result, FFTW_MEASURE | FFTW_DESTROY_INPUT); +} + +static void intersect_deactivate(LV2_Handle handle) { + Intersect *intersect = handle; + + fftwf_free(intersect->input_buffer[LEFT]); + fftwf_free(intersect->input_buffer[RIGHT]); + fftwf_free(intersect->ifft_result); + free(intersect->output_buffer[LEFT]); + free(intersect->output_buffer[RIGHT]); + free(intersect->output_buffer[CENTER]); + + fftwf_free(intersect->transformed[LEFT]); + fftwf_free(intersect->transformed[RIGHT]); + fftwf_free(intersect->pre_output); + + fftwf_destroy_plan(intersect->plan_r2c[LEFT]); + fftwf_destroy_plan(intersect->plan_r2c[RIGHT]); + fftwf_destroy_plan(intersect->plan_c2r); + + fftwf_cleanup(); +} + +static void intersect_connect_port(LV2_Handle handle, uint32_t port, void *data_location) { + Intersect *intersect = handle; + switch (port) { + case FFT_SIZE: + intersect->fft_size_hint = data_location; + break; + + case OVERLAP_FACTOR: + intersect->overlap_factor_hint = data_location; + break; + + case INPUT_CHANNEL_LEFT: + intersect->input[LEFT] = data_location; + break; + + case INPUT_CHANNEL_RIGHT: + intersect->input[RIGHT] = data_location; + break; + + case LATENCY: + intersect->latency = data_location; + break; + + case OUTPUT_CHANNEL_LEFT: + intersect->output[LEFT] = data_location; + break; + + case OUTPUT_CHANNEL_RIGHT: + intersect->output[RIGHT] = data_location; + break; + + case OUTPUT_CHANNEL_CENTER: + intersect->output[CENTER] = data_location; + break; + } +} + +static float amplitude_squared(const float c[2]) { + return c[0] * c[0] + c[1] * c[1]; +} + +static void run(LV2_Handle handle, uint32_t sample_count, Effect effect) { + Intersect *intersect = handle; + float *cursor_input [2] = {intersect->input [LEFT], intersect->input [RIGHT]}, + *cursor_output[3] = {intersect->output[LEFT], intersect->output[RIGHT], intersect->output[CENTER]}; + + while (sample_count > 0) { + const uint32_t block_size = min(sample_count, intersect->fft_jump_size - intersect->deviation); + uint32_t i; + + for (i = 0; i < block_size; ++i) { + cursor_output[0][i] = intersect->output_buffer[CENTER][i + intersect->deviation] * intersect->normalization_factor; + } + + switch (effect) { + case INTERSECT: break; + + case UPMIX: + memcpy(cursor_output[CENTER], cursor_output[0], block_size * sizeof(float)); + + /* falltrough */ + case SYMMETRIC_DIFFERENCE: { + int c_; + for (c_ = 0; c_ < 2; ++c_) { + const int c = 1 - c_; + for (i = 0; i < block_size; ++i) { + cursor_output[c][i] = intersect->output_buffer[c][i + intersect->deviation] - cursor_output[0][i]; + } + } + break; + } + } + + for (i = 0; i < 2; ++i) { + memcpy( + intersect->input_buffer[i] + intersect->fft_size - intersect->fft_jump_size + intersect->deviation, + cursor_input[i], + block_size * sizeof(float) + ); + } + + intersect->deviation += block_size; + + if (intersect->deviation == intersect->fft_jump_size) { + memmove(intersect->output_buffer[CENTER], intersect->output_buffer[CENTER] + intersect->fft_jump_size, (intersect->fft_size - intersect->fft_jump_size) * sizeof(float)); + memset(intersect->output_buffer[CENTER] + (intersect->fft_size - intersect->fft_jump_size), 0, intersect->fft_jump_size * sizeof(float)); + + for (i = 0; i < 2; ++i) { + fftwf_execute(intersect->plan_r2c[i]); + } + + for (i = 0; i < intersect->fft_size / 2 + 1; ++i) { + const float * const left = intersect->transformed[LEFT] [i], + * const right = intersect->transformed[RIGHT][i], + * const winner = (amplitude_squared(left) < amplitude_squared(right)) ? left : right; + memcpy(intersect->pre_output[i], winner, 2 * sizeof(float)); + } + + fftwf_execute(intersect->plan_c2r); + + for (i = 0; i < intersect->fft_size; ++i) { + intersect->output_buffer[CENTER][i] += intersect->ifft_result[i]; + } + for (i = 0; i < 2; ++i) { + memcpy(intersect->output_buffer[i], intersect->input_buffer[i], intersect->fft_jump_size * sizeof(float)); + memmove(intersect->input_buffer[i], intersect->input_buffer[i] + intersect->fft_jump_size, (intersect->fft_size - intersect->fft_jump_size) * sizeof(float)); + } + + intersect->deviation = 0; + } + + cursor_input[LEFT] += block_size; + cursor_input[RIGHT] += block_size; + cursor_output[LEFT] += block_size; + cursor_output[RIGHT] += block_size; + cursor_output[CENTER] += block_size; + sample_count -= block_size; + } + + if (intersect->latency != NULL) { + *intersect->latency = intersect->fft_size; + } +} + +static void intersect_run(LV2_Handle handle, uint32_t sample_count) { + run(handle, sample_count, INTERSECT); +} + +static void symmetric_difference_run(LV2_Handle handle, uint32_t sample_count) { + run(handle, sample_count, SYMMETRIC_DIFFERENCE); +} + +static void upmix_run(LV2_Handle handle, uint32_t sample_count) { + run(handle, sample_count, UPMIX); +} + +DLLEXPORT const LV2_Descriptor *lv2_descriptor(uint32_t i) { + static const LV2_Descriptor intersect_descriptor = { + .URI = INTERSECT_URI "#Intersect", + .instantiate = intersect_instantiate, + .connect_port = intersect_connect_port, + .activate = intersect_activate, + .run = intersect_run, + .deactivate = intersect_deactivate, + .cleanup = intersect_cleanup, + .extension_data = NULL, + }; + + static const LV2_Descriptor symmetric_difference_descriptor = { + .URI = INTERSECT_URI "#SymmetricDifference", + .instantiate = intersect_instantiate, + .connect_port = intersect_connect_port, + .activate = intersect_activate, + .run = symmetric_difference_run, + .deactivate = intersect_deactivate, + .cleanup = intersect_cleanup, + .extension_data = NULL, + }; + + static const LV2_Descriptor upmix_descriptor = { + .URI = INTERSECT_URI "#Upmix", + .instantiate = intersect_instantiate, + .connect_port = intersect_connect_port, + .activate = intersect_activate, + .run = upmix_run, + .deactivate = intersect_deactivate, + .cleanup = intersect_cleanup, + .extension_data = NULL, + }; + + switch (i) { + case 0: + return &intersect_descriptor; + + case 1: + return &symmetric_difference_descriptor; + + case 2: + return &upmix_descriptor; + + default: + return NULL; + } +}