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source.cpp
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source.cpp
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/*
Copyright (C) 2021 Devin Davila
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 <https://www.gnu.org/licenses/>.
*/
#include "waveform_config.hpp"
#include "math_funcs.hpp"
#include "source.hpp"
#include "settings.hpp"
#include "log.hpp"
#include <vector>
#include <string>
#include <algorithm>
#include <limits>
#ifndef DISABLE_X86_SIMD
#include "cpuinfo_x86.h"
static const auto CPU_INFO = cpu_features::GetX86Info();
const bool WAVSource::HAVE_AVX2 = CPU_INFO.features.avx2 && CPU_INFO.features.fma3;
const bool WAVSource::HAVE_AVX = CPU_INFO.features.avx && CPU_INFO.features.fma3;
const bool WAVSource::HAVE_FMA3 = CPU_INFO.features.fma3;
#endif // !DISABLE_X86_SIMD
const float WAVSource::DB_MIN = 20.0f * std::log10(std::numeric_limits<float>::min());
#ifndef HAVE_OBS_PROP_ALPHA
#define obs_properties_add_color_alpha obs_properties_add_color
#endif
static bool enum_callback(void *data, obs_source_t *src)
{
if(obs_source_get_output_flags(src) & OBS_SOURCE_AUDIO) // filter sources without audio
static_cast<std::vector<std::string>*>(data)->push_back(obs_source_get_name(src));
return true;
}
static std::vector<std::string> enumerate_audio_sources()
{
std::vector<std::string> ret;
obs_enum_sources(&enum_callback, &ret);
return ret;
}
static void update_audio_info(obs_audio_info *info)
{
if(!obs_get_audio_info(info))
{
LogWarn << "Could not determine audio configuration";
info->samples_per_sec = 44100;
info->speakers = SPEAKERS_UNKNOWN;
}
}
// hide and disable a property
static inline void set_prop_visible(obs_properties_t *props, const char *prop_name, bool vis)
{
//obs_property_set_enabled(obs_properties_get(props, prop_name), vis);
obs_property_set_visible(obs_properties_get(props, prop_name), vis);
}
// Callbacks for obs_source_info structure
namespace callbacks {
static const char *get_name([[maybe_unused]] void *data)
{
return T("source_name");
}
static void *create(obs_data_t *settings, obs_source_t *source)
{
#ifndef DISABLE_X86_SIMD
if(WAVSource::HAVE_AVX2)
return static_cast<void*>(new WAVSourceAVX2(settings, source));
else if(WAVSource::HAVE_AVX)
return static_cast<void*>(new WAVSourceAVX(settings, source));
else
return static_cast<void*>(new WAVSourceGeneric(settings, source));
#else
return static_cast<void*>(new WAVSourceGeneric(settings, source));
#endif // !DISABLE_X86_SIMD
}
static void destroy(void *data)
{
delete static_cast<WAVSource*>(data);
}
static uint32_t get_width(void *data)
{
return static_cast<WAVSource*>(data)->width();
}
static uint32_t get_height(void *data)
{
return static_cast<WAVSource*>(data)->height();
}
static void get_defaults(obs_data_t *settings)
{
obs_data_set_default_string(settings, P_AUDIO_SRC, P_NONE);
obs_data_set_default_string(settings, P_DISPLAY_MODE, P_CURVE);
obs_data_set_default_int(settings, P_WIDTH, 800);
obs_data_set_default_int(settings, P_HEIGHT, 225);
obs_data_set_default_bool(settings, P_LOG_SCALE, true);
obs_data_set_default_bool(settings, P_RADIAL, false);
obs_data_set_default_bool(settings, P_INVERT, false);
obs_data_set_default_double(settings, P_DEADZONE, 20.0);
obs_data_set_default_bool(settings, P_CAPS, false);
obs_data_set_default_string(settings, P_CHANNEL_MODE, P_MONO);
obs_data_set_default_int(settings, P_CHANNEL_SPACING, 0);
obs_data_set_default_int(settings, P_FFT_SIZE, 4096);
obs_data_set_default_bool(settings, P_AUTO_FFT_SIZE, false);
obs_data_set_default_string(settings, P_WINDOW, P_HANN);
obs_data_set_default_string(settings, P_INTERP_MODE, P_LANCZOS);
obs_data_set_default_string(settings, P_FILTER_MODE, P_NONE);
obs_data_set_default_double(settings, P_FILTER_RADIUS, 1.5);
obs_data_set_default_string(settings, P_TSMOOTHING, P_EXPAVG);
obs_data_set_default_double(settings, P_GRAVITY, 0.65);
obs_data_set_default_bool(settings, P_FAST_PEAKS, false);
obs_data_set_default_int(settings, P_CUTOFF_LOW, 30);
obs_data_set_default_int(settings, P_CUTOFF_HIGH, 17500);
obs_data_set_default_int(settings, P_FLOOR, -65);
obs_data_set_default_int(settings, P_CEILING, 0);
obs_data_set_default_double(settings, P_SLOPE, 0.0);
obs_data_set_default_double(settings, P_ROLLOFF_Q, 0.0);
obs_data_set_default_double(settings, P_ROLLOFF_RATE, 0.0);
obs_data_set_default_string(settings, P_RENDER_MODE, P_SOLID);
obs_data_set_default_int(settings, P_COLOR_BASE, 0xffffffff);
obs_data_set_default_int(settings, P_COLOR_CREST, 0xffffffff);
obs_data_set_default_double(settings, P_GRAD_RATIO, 0.75);
obs_data_set_default_int(settings, P_BAR_WIDTH, 24);
obs_data_set_default_int(settings, P_BAR_GAP, 6);
obs_data_set_default_int(settings, P_STEP_WIDTH, 8);
obs_data_set_default_int(settings, P_STEP_GAP, 4);
obs_data_set_default_int(settings, P_METER_BUF, 150);
obs_data_set_default_bool(settings, P_RMS_MODE, true);
obs_data_set_default_bool(settings, P_HIDE_SILENT, false);
}
static obs_properties_t *get_properties([[maybe_unused]] void *data)
{
auto props = obs_properties_create();
// audio source
auto srclist = obs_properties_add_list(props, P_AUDIO_SRC, T(P_AUDIO_SRC), OBS_COMBO_TYPE_LIST, OBS_COMBO_FORMAT_STRING);
obs_property_list_add_string(srclist, T(P_NONE), P_NONE);
obs_property_list_add_string(srclist, T(P_OUTPUT_BUS), P_OUTPUT_BUS);
for(const auto& str : enumerate_audio_sources())
obs_property_list_add_string(srclist, str.c_str(), str.c_str());
// hide on silent audio
obs_properties_add_bool(props, P_HIDE_SILENT, T(P_HIDE_SILENT));
// display type
auto displaylist = obs_properties_add_list(props, P_DISPLAY_MODE, T(P_DISPLAY_MODE), OBS_COMBO_TYPE_LIST, OBS_COMBO_FORMAT_STRING);
obs_property_list_add_string(displaylist, T(P_CURVE), P_CURVE);
obs_property_list_add_string(displaylist, T(P_BARS), P_BARS);
obs_property_list_add_string(displaylist, T(P_STEP_BARS), P_STEP_BARS);
obs_property_list_add_string(displaylist, T(P_LEVEL_METER), P_LEVEL_METER);
obs_property_list_add_string(displaylist, T(P_STEPPED_METER), P_STEPPED_METER);
obs_properties_add_int(props, P_BAR_WIDTH, T(P_BAR_WIDTH), 1, 256, 1);
obs_properties_add_int(props, P_BAR_GAP, T(P_BAR_GAP), 0, 256, 1);
obs_properties_add_int(props, P_STEP_WIDTH, T(P_STEP_WIDTH), 1, 256, 1);
obs_properties_add_int(props, P_STEP_GAP, T(P_STEP_GAP), 0, 256, 1);
obs_property_set_modified_callback(displaylist, [](obs_properties_t *props, [[maybe_unused]] obs_property_t *property, obs_data_t *settings) -> bool {
auto disp = obs_data_get_string(settings, P_DISPLAY_MODE);
auto meter = p_equ(disp, P_LEVEL_METER);
auto step_meter = p_equ(disp, P_STEPPED_METER);
auto bar = p_equ(disp, P_BARS) || meter;
auto step = p_equ(disp, P_STEP_BARS) || step_meter;
auto curve = p_equ(disp, P_CURVE);
set_prop_visible(props, P_BAR_WIDTH, bar || step);
set_prop_visible(props, P_BAR_GAP, bar || step);
set_prop_visible(props, P_STEP_WIDTH, step);
set_prop_visible(props, P_STEP_GAP, step);
set_prop_visible(props, P_CAPS, bar);
obs_property_list_item_disable(obs_properties_get(props, P_RENDER_MODE), 0, !curve);
// meter mode
bool notmeter = !(meter || step_meter);
set_prop_visible(props, P_SLOPE, notmeter);
set_prop_visible(props, P_ROLLOFF_Q, notmeter);
set_prop_visible(props, P_ROLLOFF_RATE, notmeter);
set_prop_visible(props, P_CUTOFF_LOW, notmeter);
set_prop_visible(props, P_CUTOFF_HIGH, notmeter);
set_prop_visible(props, P_FILTER_MODE, notmeter);
set_prop_visible(props, P_FILTER_RADIUS, notmeter && !p_equ(obs_data_get_string(settings, P_FILTER_MODE), P_NONE));
set_prop_visible(props, P_INTERP_MODE, notmeter);
set_prop_visible(props, P_CHANNEL_MODE, notmeter);
set_prop_visible(props, P_CHANNEL_SPACING, notmeter && p_equ(obs_data_get_string(settings, P_CHANNEL_MODE), P_STEREO));
set_prop_visible(props, P_WINDOW, notmeter);
set_prop_visible(props, P_RADIAL, notmeter);
set_prop_visible(props, P_DEADZONE, notmeter && obs_data_get_bool(settings, P_RADIAL));
set_prop_visible(props, P_INVERT, notmeter && obs_data_get_bool(settings, P_RADIAL));
set_prop_visible(props, P_LOG_SCALE, notmeter);
set_prop_visible(props, P_WIDTH, notmeter);
set_prop_visible(props, P_AUTO_FFT_SIZE, notmeter);
set_prop_visible(props, P_FFT_SIZE, notmeter);
set_prop_visible(props, P_RMS_MODE, !notmeter);
set_prop_visible(props, P_METER_BUF, !notmeter);
return true;
});
// video size
obs_properties_add_int(props, P_WIDTH, T(P_WIDTH), 32, 3840, 1);
obs_properties_add_int(props, P_HEIGHT, T(P_HEIGHT), 32, 2160, 1);
// log scale
obs_properties_add_bool(props, P_LOG_SCALE, T(P_LOG_SCALE));
// radial layout
auto rad = obs_properties_add_bool(props, P_RADIAL, T(P_RADIAL));
obs_properties_add_bool(props, P_INVERT, T(P_INVERT));
auto deadzone = obs_properties_add_float_slider(props, P_DEADZONE, T(P_DEADZONE), 0.0, 100.0, 0.1);
obs_property_float_set_suffix(deadzone, "%");
obs_property_set_long_description(deadzone, T(P_DEADZONE_DESC));
obs_property_set_modified_callback(rad, [](obs_properties_t *props, [[maybe_unused]] obs_property_t *property, obs_data_t *settings) -> bool {
auto enable = obs_data_get_bool(settings, P_RADIAL) && obs_property_visible(obs_properties_get(props, P_RADIAL));
set_prop_visible(props, P_DEADZONE, enable);
set_prop_visible(props, P_INVERT, enable);
return true;
});
// rounded caps
auto caps = obs_properties_add_bool(props, P_CAPS, T(P_CAPS));
obs_property_set_long_description(caps, T(P_CAPS_DESC));
// meter
obs_properties_add_bool(props, P_RMS_MODE, T(P_RMS_MODE));
auto meterbuf = obs_properties_add_int_slider(props, P_METER_BUF, T(P_METER_BUF), 16, 1000, 1);
obs_property_int_set_suffix(meterbuf, " ms");
// channels
auto chanlst = obs_properties_add_list(props, P_CHANNEL_MODE, T(P_CHANNEL_MODE), OBS_COMBO_TYPE_LIST, OBS_COMBO_FORMAT_STRING);
obs_property_list_add_string(chanlst, T(P_MONO), P_MONO);
obs_property_list_add_string(chanlst, T(P_STEREO), P_STEREO);
obs_property_set_long_description(chanlst, T(P_CHAN_DESC));
// channel spacing
obs_properties_add_int(props, P_CHANNEL_SPACING, T(P_CHANNEL_SPACING), 0, 2160, 1);
obs_property_set_modified_callback(chanlst, [](obs_properties_t *props, [[maybe_unused]] obs_property_t *property, obs_data_t *settings) -> bool {
auto enable = p_equ(obs_data_get_string(settings, P_CHANNEL_MODE), P_STEREO) && obs_property_visible(obs_properties_get(props, P_CHANNEL_MODE));
set_prop_visible(props, P_CHANNEL_SPACING, enable);
return true;
});
// fft size
auto autofftsz = obs_properties_add_bool(props, P_AUTO_FFT_SIZE, T(P_AUTO_FFT_SIZE));
auto fftsz = obs_properties_add_int_slider(props, P_FFT_SIZE, T(P_FFT_SIZE), 128, 4096, 64);
obs_property_set_long_description(autofftsz, T(P_AUTO_FFT_DESC));
obs_property_set_long_description(fftsz, T(P_FFT_DESC));
obs_property_set_modified_callback(autofftsz, [](obs_properties_t *props, [[maybe_unused]] obs_property_t *property, obs_data_t *settings) -> bool {
auto enable = !obs_data_get_bool(settings, P_AUTO_FFT_SIZE);
obs_property_set_enabled(obs_properties_get(props, P_FFT_SIZE), enable);
return true;
});
// fft window function
auto wndlist = obs_properties_add_list(props, P_WINDOW, T(P_WINDOW), OBS_COMBO_TYPE_LIST, OBS_COMBO_FORMAT_STRING);
obs_property_list_add_string(wndlist, T(P_NONE), P_NONE);
obs_property_list_add_string(wndlist, T(P_HANN), P_HANN);
obs_property_list_add_string(wndlist, T(P_HAMMING), P_HAMMING);
obs_property_list_add_string(wndlist, T(P_BLACKMAN), P_BLACKMAN);
obs_property_list_add_string(wndlist, T(P_BLACKMAN_HARRIS), P_BLACKMAN_HARRIS);
obs_property_set_long_description(wndlist, T(P_WINDOW_DESC));
// smoothing
auto tsmoothlist = obs_properties_add_list(props, P_TSMOOTHING, T(P_TSMOOTHING), OBS_COMBO_TYPE_LIST, OBS_COMBO_FORMAT_STRING);
obs_property_list_add_string(tsmoothlist, T(P_NONE), P_NONE);
obs_property_list_add_string(tsmoothlist, T(P_EXPAVG), P_EXPAVG);
auto grav = obs_properties_add_float_slider(props, P_GRAVITY, T(P_GRAVITY), 0.0, 1.0, 0.01);
auto peaks = obs_properties_add_bool(props, P_FAST_PEAKS, T(P_FAST_PEAKS));
obs_property_set_long_description(tsmoothlist, T(P_TEMPORAL_DESC));
obs_property_set_long_description(grav, T(P_GRAVITY_DESC));
obs_property_set_long_description(peaks, T(P_FAST_PEAKS_DESC));
obs_property_set_modified_callback(tsmoothlist, [](obs_properties_t *props, [[maybe_unused]] obs_property_t *property, obs_data_t *settings) -> bool {
auto enable = !p_equ(obs_data_get_string(settings, P_TSMOOTHING), P_NONE);
set_prop_visible(props, P_GRAVITY, enable);
set_prop_visible(props, P_FAST_PEAKS, enable);
return true;
});
// interpolation
auto interplist = obs_properties_add_list(props, P_INTERP_MODE, T(P_INTERP_MODE), OBS_COMBO_TYPE_LIST, OBS_COMBO_FORMAT_STRING);
obs_property_list_add_string(interplist, T(P_POINT), P_POINT);
obs_property_list_add_string(interplist, T(P_LANCZOS), P_LANCZOS);
obs_property_set_long_description(interplist, T(P_INTERP_DESC));
// filter
auto filterlist = obs_properties_add_list(props, P_FILTER_MODE, T(P_FILTER_MODE), OBS_COMBO_TYPE_LIST, OBS_COMBO_FORMAT_STRING);
obs_property_list_add_string(filterlist, T(P_NONE), P_NONE);
obs_property_list_add_string(filterlist, T(P_GAUSS), P_GAUSS);
obs_properties_add_float_slider(props, P_FILTER_RADIUS, T(P_FILTER_RADIUS), 0.0, 32.0, 0.01);
obs_property_set_long_description(filterlist, T(P_FILTER_DESC));
obs_property_set_modified_callback(filterlist, [](obs_properties_t *props, [[maybe_unused]] obs_property_t *property, obs_data_t *settings) -> bool {
auto enable = !p_equ(obs_data_get_string(settings, P_FILTER_MODE), P_NONE) && obs_property_visible(obs_properties_get(props, P_FILTER_MODE));
set_prop_visible(props, P_FILTER_RADIUS, enable);
return true;
});
// display
auto low_cut = obs_properties_add_int_slider(props, P_CUTOFF_LOW, T(P_CUTOFF_LOW), 0, 24000, 1);
auto high_cut = obs_properties_add_int_slider(props, P_CUTOFF_HIGH, T(P_CUTOFF_HIGH), 0, 24000, 1);
obs_property_int_set_suffix(low_cut, " Hz");
obs_property_int_set_suffix(high_cut, " Hz");
auto floor = obs_properties_add_int_slider(props, P_FLOOR, T(P_FLOOR), -120, 0, 1);
auto ceiling = obs_properties_add_int_slider(props, P_CEILING, T(P_CEILING), -120, 0, 1);
obs_property_int_set_suffix(floor, " dBFS");
obs_property_int_set_suffix(ceiling, " dBFS");
auto slope = obs_properties_add_float_slider(props, P_SLOPE, T(P_SLOPE), 0.0, 10.0, 0.01);
obs_property_set_long_description(slope, T(P_SLOPE_DESC));
auto rolloff_q = obs_properties_add_float_slider(props, P_ROLLOFF_Q, T(P_ROLLOFF_Q), 0.0, 10.0, 0.01);
obs_property_set_long_description(rolloff_q, T(P_ROLLOFF_Q_DESC));
auto rolloff_rate = obs_properties_add_float_slider(props, P_ROLLOFF_RATE, T(P_ROLLOFF_RATE), 0.0, 65.0, 0.01);
obs_property_set_long_description(rolloff_rate, T(P_ROLLOFF_RATE_DESC));
auto renderlist = obs_properties_add_list(props, P_RENDER_MODE, T(P_RENDER_MODE), OBS_COMBO_TYPE_LIST, OBS_COMBO_FORMAT_STRING);
obs_property_list_add_string(renderlist, T(P_LINE), P_LINE);
obs_property_list_add_string(renderlist, T(P_SOLID), P_SOLID);
obs_property_list_add_string(renderlist, T(P_GRADIENT), P_GRADIENT);
obs_properties_add_color_alpha(props, P_COLOR_BASE, T(P_COLOR_BASE));
obs_properties_add_color_alpha(props, P_COLOR_CREST, T(P_COLOR_CREST));
obs_properties_add_float_slider(props, P_GRAD_RATIO, T(P_GRAD_RATIO), 0.0, 4.0, 0.01);
obs_property_set_modified_callback(renderlist, [](obs_properties_t *props, [[maybe_unused]] obs_property_t *property, obs_data_t *settings) -> bool {
auto enable = p_equ(obs_data_get_string(settings, P_RENDER_MODE), P_GRADIENT);
obs_property_set_enabled(obs_properties_get(props, P_COLOR_CREST), enable);
set_prop_visible(props, P_GRAD_RATIO, enable);
return true;
});
return props;
}
static void update(void *data, obs_data_t *settings)
{
static_cast<WAVSource*>(data)->update(settings);
}
static void show(void *data)
{
static_cast<WAVSource*>(data)->show();
}
static void hide(void *data)
{
static_cast<WAVSource*>(data)->hide();
}
static void tick(void *data, float seconds)
{
static_cast<WAVSource*>(data)->tick(seconds);
}
static void render(void *data, gs_effect_t *effect)
{
static_cast<WAVSource*>(data)->render(effect);
}
static void capture_audio(void *data, obs_source_t *source, const audio_data *audio, bool muted)
{
static_cast<WAVSource*>(data)->capture_audio(source, audio, muted);
}
static void capture_output_bus(void *param, size_t mix_idx, audio_data *data)
{
static_cast<WAVSource*>(param)->capture_output_bus(mix_idx, data);
}
}
void WAVSource::get_settings(obs_data_t *settings)
{
auto src_name = obs_data_get_string(settings, P_AUDIO_SRC);
m_width = (unsigned int)obs_data_get_int(settings, P_WIDTH);
m_height = (unsigned int)obs_data_get_int(settings, P_HEIGHT);
m_log_scale = obs_data_get_bool(settings, P_LOG_SCALE);
m_radial = obs_data_get_bool(settings, P_RADIAL);
m_invert = obs_data_get_bool(settings, P_INVERT);
auto deadzone = (float)obs_data_get_double(settings, P_DEADZONE) / 100.0f;
m_rounded_caps = obs_data_get_bool(settings, P_CAPS);
m_stereo = p_equ(obs_data_get_string(settings, P_CHANNEL_MODE), P_STEREO);
m_channel_spacing = (int)obs_data_get_int(settings, P_CHANNEL_SPACING);
m_fft_size = (size_t)obs_data_get_int(settings, P_FFT_SIZE);
m_auto_fft_size = obs_data_get_bool(settings, P_AUTO_FFT_SIZE);
auto wnd = obs_data_get_string(settings, P_WINDOW);
auto tsmoothing = obs_data_get_string(settings, P_TSMOOTHING);
m_gravity = (float)obs_data_get_double(settings, P_GRAVITY);
m_fast_peaks = obs_data_get_bool(settings, P_FAST_PEAKS);
auto interp = obs_data_get_string(settings, P_INTERP_MODE);
auto filtermode = obs_data_get_string(settings, P_FILTER_MODE);
m_filter_radius = (float)obs_data_get_double(settings, P_FILTER_RADIUS);
m_cutoff_low = (int)obs_data_get_int(settings, P_CUTOFF_LOW);
m_cutoff_high = (int)obs_data_get_int(settings, P_CUTOFF_HIGH);
m_floor = (int)obs_data_get_int(settings, P_FLOOR);
m_ceiling = (int)obs_data_get_int(settings, P_CEILING);
m_slope = (float)obs_data_get_double(settings, P_SLOPE);
m_rolloff_q = (float)obs_data_get_double(settings, P_ROLLOFF_Q);
m_rolloff_rate = (float)obs_data_get_double(settings, P_ROLLOFF_RATE);
auto rendermode = obs_data_get_string(settings, P_RENDER_MODE);
auto color_base = obs_data_get_int(settings, P_COLOR_BASE);
auto color_crest = obs_data_get_int(settings, P_COLOR_CREST);
m_grad_ratio = (float)obs_data_get_double(settings, P_GRAD_RATIO);
auto display = obs_data_get_string(settings, P_DISPLAY_MODE);
m_bar_width = (int)obs_data_get_int(settings, P_BAR_WIDTH);
m_bar_gap = (int)obs_data_get_int(settings, P_BAR_GAP);
m_step_width = (int)obs_data_get_int(settings, P_STEP_WIDTH);
m_step_gap = (int)obs_data_get_int(settings, P_STEP_GAP);
m_meter_rms = obs_data_get_bool(settings, P_RMS_MODE);
m_meter_ms = (int)obs_data_get_int(settings, P_METER_BUF);
m_hide_on_silent = obs_data_get_bool(settings, P_HIDE_SILENT);
m_color_base = { (uint8_t)color_base / 255.0f, (uint8_t)(color_base >> 8) / 255.0f, (uint8_t)(color_base >> 16) / 255.0f, (uint8_t)(color_base >> 24) / 255.0f };
m_color_crest = { (uint8_t)color_crest / 255.0f, (uint8_t)(color_crest >> 8) / 255.0f, (uint8_t)(color_crest >> 16) / 255.0f, (uint8_t)(color_crest >> 24) / 255.0f };
if(m_fft_size < 128)
m_fft_size = 128;
else if(m_fft_size & 15)
m_fft_size &= -16; // align to 64-byte multiple so that N/2 is AVX aligned
if((m_cutoff_high - m_cutoff_low) < 1)
{
m_cutoff_high = 17500;
m_cutoff_low = 120;
}
if((m_ceiling - m_floor) < 1)
{
m_ceiling = 0;
m_floor = -120;
}
if(!m_stereo || (((int)m_height - m_channel_spacing) < 1))
m_channel_spacing = 0;
if(src_name != nullptr)
m_audio_source_name = src_name;
else
m_audio_source_name.clear();
if(p_equ(wnd, P_HANN))
m_window_func = FFTWindow::HANN;
else if(p_equ(wnd, P_HAMMING))
m_window_func = FFTWindow::HAMMING;
else if(p_equ(wnd, P_BLACKMAN))
m_window_func = FFTWindow::BLACKMAN;
else if(p_equ(wnd, P_BLACKMAN_HARRIS))
m_window_func = FFTWindow::BLACKMAN_HARRIS;
else
m_window_func = FFTWindow::NONE;
if(p_equ(interp, P_LANCZOS))
m_interp_mode = InterpMode::LANCZOS;
else
m_interp_mode = InterpMode::POINT;
if(p_equ(filtermode, P_GAUSS))
m_filter_mode = FilterMode::GAUSS;
else
m_filter_mode = FilterMode::NONE;
if(p_equ(tsmoothing, P_EXPAVG))
m_tsmoothing = TSmoothingMode::EXPONENTIAL;
else
m_tsmoothing = TSmoothingMode::NONE;
if(p_equ(rendermode, P_LINE))
m_render_mode = RenderMode::LINE;
else if(p_equ(rendermode, P_SOLID))
m_render_mode = RenderMode::SOLID;
else
m_render_mode = RenderMode::GRADIENT;
if(p_equ(display, P_BARS))
m_display_mode = DisplayMode::BAR;
else if(p_equ(display, P_STEP_BARS))
m_display_mode = DisplayMode::STEPPED_BAR;
else if(p_equ(display, P_LEVEL_METER))
m_display_mode = DisplayMode::METER;
else if(p_equ(display, P_STEPPED_METER))
m_display_mode = DisplayMode::STEPPED_METER;
else
m_display_mode = DisplayMode::CURVE;
if((m_display_mode != DisplayMode::BAR) && (m_display_mode != DisplayMode::METER))
m_rounded_caps = false;
m_meter_mode = false;
if((m_display_mode == DisplayMode::METER) || (m_display_mode == DisplayMode::STEPPED_METER))
{
m_radial = false;
m_meter_mode = true;
}
if(m_radial)
{
m_height /= 2; // fit diameter to hieght of bounding box
auto max_deadzone = (float)(m_height - 16);
if(m_rounded_caps)
max_deadzone = std::max(max_deadzone - m_bar_width, 0.0f);
m_deadzone = std::min(std::floor((float)m_height * deadzone), max_deadzone);
m_height -= (int)m_deadzone;
}
}
void WAVSource::recapture_audio()
{
// release old capture
release_audio_capture();
// add new capture
auto src_name = m_audio_source_name.c_str();
if(p_equ(src_name, P_OUTPUT_BUS))
{
audio_convert_info cvt{};
cvt.format = audio_format::AUDIO_FORMAT_FLOAT_PLANAR;
cvt.samples_per_sec = m_audio_info.samples_per_sec;
cvt.speakers = (m_audio_info.speakers != speaker_layout::SPEAKERS_UNKNOWN) ? m_audio_info.speakers : speaker_layout::SPEAKERS_STEREO;
m_output_bus_captured = audio_output_connect(obs_get_audio(), 0, &cvt, &callbacks::capture_output_bus, this);
}
else
{
auto asrc = obs_get_source_by_name(src_name);
if(asrc != nullptr)
{
obs_source_add_audio_capture_callback(asrc, &callbacks::capture_audio, this);
m_audio_source = obs_source_get_weak_source(asrc);
obs_source_release(asrc);
}
else if(!p_equ(src_name, "none"))
{
if(m_retries++ == 0)
LogWarn << "Failed to get audio source: \"" << src_name << "\"";
}
}
}
void WAVSource::release_audio_capture()
{
if(m_audio_source != nullptr)
{
auto src = obs_weak_source_get_source(m_audio_source);
obs_weak_source_release(m_audio_source);
m_audio_source = nullptr;
if(src != nullptr)
{
obs_source_remove_audio_capture_callback(src, &callbacks::capture_audio, this);
obs_source_release(src);
}
}
if(m_output_bus_captured)
{
audio_output_disconnect(obs_get_audio(), 0, &callbacks::capture_output_bus, this);
m_output_bus_captured = false;
}
// reset circular buffers
for(auto& i : m_capturebufs)
{
i.end_pos = 0;
i.start_pos = 0;
i.size = 0;
}
}
bool WAVSource::check_audio_capture(float seconds)
{
if(m_output_bus_captured)
return true;
if(m_audio_source == nullptr)
{
m_next_retry -= seconds;
if(m_next_retry <= 0.0f)
{
m_next_retry = RETRY_DELAY;
recapture_audio();
if(m_audio_source != nullptr)
return true;
}
return false;
}
// check if the source still exists
auto src = obs_weak_source_get_source(m_audio_source);
if(src == nullptr)
{
release_audio_capture();
return false;
}
obs_source_release(src);
return true;
}
void WAVSource::free_bufs()
{
for(auto i = 0; i < 2; ++i)
{
m_decibels[i].reset();
m_tsmooth_buf[i].reset();
}
m_fft_input.reset();
m_fft_output.reset();
m_window_coefficients.reset();
m_slope_modifiers.reset();
if(m_fft_plan != nullptr)
{
fftwf_destroy_plan(m_fft_plan);
m_fft_plan = nullptr;
}
m_fft_size = 0;
}
void WAVSource::init_interp(unsigned int sz)
{
const auto maxbin = (m_fft_size / 2) - 1;
const auto sr = (float)m_audio_info.samples_per_sec;
const auto lowbin = std::clamp((float)m_cutoff_low * m_fft_size / sr, 1.0f, (float)maxbin);
const auto highbin = std::clamp((float)m_cutoff_high * m_fft_size / sr, 1.0f, (float)maxbin);
m_interp_indices.resize(sz);
if(m_log_scale)
{
for(auto i = 0u; i < sz; ++i)
m_interp_indices[i] = log_interp(lowbin, highbin, (float)i / (float)(sz - 1));
}
else
{
for(auto i = 0u; i < sz; ++i)
m_interp_indices[i] = lerp(lowbin, highbin, (float)i / (float)(sz - 1));
}
}
void WAVSource::init_rolloff()
{
const auto sz = m_fft_size / 2;
const auto sr = (float)m_audio_info.samples_per_sec;
const auto coeff = sr / (float)m_fft_size;
const auto ratio = std::exp2(m_rolloff_q);
const auto freq_low = (float)m_cutoff_low * ratio;
const auto freq_high = (float)m_cutoff_high / ratio;
m_rolloff_modifiers.resize(m_fft_size / 2);
m_rolloff_modifiers[0] = 0.0f;
for(size_t i = 1u; i < sz; ++i)
{
auto freq = i * coeff;
auto ratio_low = freq_low / freq;
auto ratio_high = freq / freq_high;
auto low_attenuation = (ratio_low > 1.0f) ? (m_rolloff_rate * std::log2(ratio_low)) : 0.0f;
auto high_attenuation = (ratio_high > 1.0f) ? (m_rolloff_rate * std::log2(ratio_high)) : 0.0f;
m_rolloff_modifiers[i] = low_attenuation + high_attenuation;
}
}
void WAVSource::init_steps()
{
m_step_verts.resize(6);
const auto x1 = 0.0f;
const auto x2 = (float)m_bar_width;
const auto y1 = 0.0f;
const auto y2 = (float)m_step_width;
vec3_set(&m_step_verts[0], x1, y1, 0);
vec3_set(&m_step_verts[1], x2, y1, 0);
vec3_set(&m_step_verts[2], x1, y2, 0);
vec3_set(&m_step_verts[3], x2, y1, 0);
vec3_set(&m_step_verts[4], x1, y2, 0);
vec3_set(&m_step_verts[5], x2, y2, 0);
}
WAVSource::WAVSource(obs_data_t *settings, obs_source_t *source)
{
m_source = source;
for(auto& i : m_capturebufs)
circlebuf_init(&i);
update(settings);
obs_enter_graphics();
// create shader
auto filename = obs_module_file("gradient.effect");
m_shader = gs_effect_create_from_file(filename, nullptr);
bfree(filename);
obs_leave_graphics();
}
WAVSource::~WAVSource()
{
obs_enter_graphics();
gs_vertexbuffer_destroy(m_vbuf);
gs_effect_destroy(m_shader);
obs_leave_graphics();
std::lock_guard lock(m_mtx);
release_audio_capture();
free_bufs();
for(auto& i : m_capturebufs)
circlebuf_free(&i);
}
unsigned int WAVSource::width()
{
std::lock_guard lock(m_mtx);
if(m_meter_mode)
return (m_bar_width * m_capture_channels) + ((m_capture_channels > 1) ? m_bar_gap : 0);
if(m_radial)
return (unsigned int)((m_height + m_deadzone) * 2);
return m_width;
}
unsigned int WAVSource::height()
{
std::lock_guard lock(m_mtx);
if(m_radial)
return (unsigned int)((m_height + m_deadzone) * 2);
return m_height;
}
void WAVSource::create_vbuf() {
size_t num_verts = 0;
if(m_display_mode == DisplayMode::CURVE)
num_verts = (size_t)((m_render_mode == RenderMode::LINE) ? m_width : (m_width + 2));
else
{
const auto bar_stride = m_bar_width + m_bar_gap;
const auto step_stride = m_step_width + m_step_gap;
const auto center = (float)m_height / 2;
const auto bottom = (float)m_height;
const auto dbrange = m_ceiling - m_floor;
const auto cpos = m_stereo ? center : bottom;
const auto channel_offset = m_channel_spacing * 0.5f;
auto max_steps = (size_t)((cpos - channel_offset) / step_stride);
if(((int)cpos - (int)(max_steps * step_stride) - (int)channel_offset) > m_step_width)
++max_steps;
num_verts = (size_t)(m_num_bars * 6);
if((m_display_mode == DisplayMode::STEPPED_BAR) || (m_display_mode == DisplayMode::STEPPED_METER))
num_verts *= max_steps;
else if(m_rounded_caps)
num_verts += m_cap_tris * ((m_channel_spacing > 0) ? 12 : 6) * m_num_bars; // 2 caps per bar (middle omitted when 0 spacing)
}
obs_enter_graphics();
gs_vertexbuffer_destroy(m_vbuf);
auto vbdata = gs_vbdata_create();
vbdata->num = num_verts;
vbdata->points = (vec3*)bmalloc(num_verts * sizeof(vec3));
vbdata->num_tex = 1;
vbdata->tvarray = (gs_tvertarray*)bzalloc(sizeof(gs_tvertarray));
vbdata->tvarray->width = 2;
vbdata->tvarray->array = bmalloc(2 * num_verts * sizeof(float));
m_vbuf = gs_vertexbuffer_create(vbdata, GS_DYNAMIC);
if(m_display_mode == DisplayMode::CURVE) {
for(auto i = 0u; i < num_verts; ++i)
{
vec3_set(&vbdata->points[i], i, 0, 0);
}
}
obs_leave_graphics();
}
void WAVSource::update(obs_data_t *settings)
{
std::lock_guard lock(m_mtx);
release_audio_capture();
free_bufs();
get_settings(settings);
// get current audio settings
update_audio_info(&m_audio_info);
m_capture_channels = std::min(get_audio_channels(m_audio_info.speakers), 2u);
if(m_capture_channels == 0)
{
auto channels = (unsigned int)m_audio_info.speakers;
if(channels > 0)
{
m_capture_channels = std::min((uint32_t)channels, 2u);
LogWarn << "Attempting to support unknown channel config: " << channels;
}
else
{
LogWarn << "Could not determine audio channel count";
}
}
// meter mode
if(m_meter_mode)
{
// turn off stuff we don't need in this mode
m_window_func = FFTWindow::NONE;
m_interp_mode = InterpMode::POINT;
m_filter_mode = FilterMode::NONE;
m_auto_fft_size = false;
m_slope = 0.0f;
m_stereo = false;
m_radial = false;
// repurpose m_fft_size for meter buffer size
m_fft_size = size_t(m_audio_info.samples_per_sec * (m_meter_ms / 1000.0)) & -16;
memset(m_meter_pos, 0, sizeof(m_meter_pos));
for(auto& i : m_meter_buf)
i = DB_MIN;
for(auto& i : m_meter_val)
i = DB_MIN;
}
// calculate FFT size based on video FPS
obs_video_info vinfo = {};
if(obs_get_video_info(&vinfo))
m_fps = double(vinfo.fps_num) / double(vinfo.fps_den);
else
m_fps = 60.0;
if(m_auto_fft_size)
{
// align to 64-byte multiple so that N/2 is AVX aligned
m_fft_size = size_t(m_audio_info.samples_per_sec / m_fps) & -16;
if(m_fft_size < 128)
m_fft_size = 128;
}
// alloc fftw buffers
m_output_channels = ((m_capture_channels > 1) || m_stereo) ? 2u : 1u;
for(auto i = 0u; i < m_output_channels; ++i)
{
auto count = m_meter_mode ? m_fft_size : m_fft_size / 2;
m_decibels[i].reset(membuf_alloc<float>(count));
if(m_meter_mode)
memset(m_decibels[i].get(), 0, count * sizeof(float));
else
{
if(m_tsmoothing != TSmoothingMode::NONE)
m_tsmooth_buf[i].reset(membuf_alloc<float>(count));
for(auto j = 0u; j < count; ++j)
{
m_decibels[i][j] = DB_MIN;
if(m_tsmoothing != TSmoothingMode::NONE)
m_tsmooth_buf[i][j] = 0;
}
}
}
if(!m_meter_mode)
{
m_fft_input.reset(membuf_alloc<float>(m_fft_size));
m_fft_output.reset(membuf_alloc<fftwf_complex>(m_fft_size));
m_fft_plan = fftwf_plan_dft_r2c_1d((int)m_fft_size, m_fft_input.get(), m_fft_output.get(), FFTW_ESTIMATE);
}
// window function
if(m_window_func != FFTWindow::NONE)
{
// precompute window coefficients
m_window_coefficients.reset(membuf_alloc<float>(m_fft_size));
const auto N = m_fft_size - 1;
constexpr auto pi2 = 2 * (float)M_PI;
constexpr auto pi4 = 4 * (float)M_PI;
constexpr auto pi6 = 6 * (float)M_PI;
switch(m_window_func)
{
case FFTWindow::HAMMING:
for(size_t i = 0; i < m_fft_size; ++i)
m_window_coefficients[i] = 0.53836f - (0.46164f * std::cos((pi2 * i) / N));
break;
case FFTWindow::BLACKMAN:
for(size_t i = 0; i < m_fft_size; ++i)
m_window_coefficients[i] = 0.42f - (0.5f * std::cos((pi2 * i) / N)) + (0.08f * std::cos((pi4 * i) / N));
break;
case FFTWindow::BLACKMAN_HARRIS:
for(size_t i = 0; i < m_fft_size; ++i)
m_window_coefficients[i] = 0.35875f - (0.48829f * std::cos((pi2 * i) / N)) + (0.14128f * std::cos((pi4 * i) / N)) - (0.01168f * std::cos((pi6 * i) / N));
break;
case FFTWindow::HANN:
default:
for(size_t i = 0; i < m_fft_size; ++i)
m_window_coefficients[i] = 0.5f * (1 - std::cos((pi2 * i) / N));
break;
}
}
m_last_silent = false;
m_show = true;
m_retries = 0;
m_next_retry = 0.0f;
recapture_audio();
for(auto& i : m_capturebufs)
{
auto bufsz = m_fft_size * sizeof(float);
if(i.size < bufsz)
circlebuf_push_back_zero(&i, bufsz - i.size);
}
// precomupte interpolated indices
if(m_display_mode == DisplayMode::CURVE)
{
init_interp(m_width);
for(auto& i : m_interp_bufs)
i.resize(m_width);
}
else if(m_meter_mode)
{
// channel meter rendering through the bar renderer
// emulate 1-2 bar spectrum graph
m_interp_indices.clear();
for(auto& i : m_interp_bufs)
i.clear();
m_interp_bufs[0].resize(m_capture_channels);
m_num_bars = m_capture_channels;
}
else
{
const auto bar_stride = m_bar_width + m_bar_gap;
m_num_bars = (int)(m_width / bar_stride);
if(((int)m_width - (m_num_bars * bar_stride)) >= m_bar_width)
++m_num_bars;
init_interp(m_num_bars + 1); // make extra band for last bar
for(auto& i : m_interp_bufs)
i.resize(m_num_bars);
}
// vertex buffer must be rebuilt if the settings have changed
// this must be done after m_num_bars has been initialized
create_vbuf();
// filter
if(m_filter_mode == FilterMode::GAUSS)
m_kernel = make_gauss_kernel(m_filter_radius);
// slope
const auto num_mods = m_fft_size / 2;
const auto maxmod = (float)(num_mods - 1);
m_slope_modifiers.reset(membuf_alloc<float>(num_mods));
for(size_t i = 0; i < num_mods; ++i)
m_slope_modifiers[i] = log10(log_interp(10.0f, 10000.0f, ((float)i * m_slope) / maxmod));
// rounded caps
m_cap_verts.clear();
if(m_rounded_caps)
{
// caps are full circles to avoid distortion issues in radial mode
m_cap_radius = (float)m_bar_width / 2.0f;
m_cap_tris = std::max((int)((2 * (float)M_PI * m_cap_radius) / 3.0f), 4);
if(m_cap_tris & 1) // force even number of triangles
m_cap_tris += 1;
auto angle = (2 * (float)M_PI) / (float)m_cap_tris;
auto verts = m_cap_tris + 1;
m_cap_verts.resize(verts);
for(auto j = 0; j < verts; ++j)
{
auto a = j * angle;
vec3_set(&m_cap_verts[j], m_cap_radius * std::cos(a), m_cap_radius * std::sin(a), 0.0f);
}
}
// stepped bars
if((m_display_mode == DisplayMode::STEPPED_BAR) || (m_display_mode == DisplayMode::STEPPED_METER))
init_steps();
// roll-off
if((m_rolloff_q > 0.0f) && (m_rolloff_rate > 0.0f))
init_rolloff();
else
m_rolloff_modifiers.clear();
}