Add a sfizz_render client in-tree

.gitmodules

@@ -18,3 +18,6 @@
 	path = vst/external/VST_SDK/VST3_SDK/vstgui4
 	url = https://github.com/sfztools/vstgui.git
 	shallow = true
+[submodule "clients/external/fmidi"]
+	path = clients/external/fmidi
+	url = https://github.com/jpcima/fmidi.git

clients/CMakeLists.txt

@@ -8,4 +8,10 @@ target_include_directories (sfizz_jack PRIVATE ${JACK_INCLUDE_DIRS})
 target_link_libraries (sfizz_jack PRIVATE sfizz::sfizz jack absl::flags_parse ${JACK_LIBRARIES})
 sfizz_enable_lto_if_needed (sfizz_jack)
 install (TARGETS sfizz_jack DESTINATION ${CMAKE_INSTALL_BINDIR}
-    COMPONENT "jack" OPTIONAL)
+COMPONENT "jack" OPTIONAL)
+
+add_subdirectory(external/fmidi EXCLUDE_FROM_ALL)
+add_executable(sfizz_render sfizz_render.cpp)
+target_link_libraries(sfizz_render sfizz::sfizz fmidi-player fmidi)
+sfizz_enable_lto_if_needed (sfizz_render)
+install (TARGETS sfizz_render DESTINATION ${CMAKE_INSTALL_BINDIR} OPTIONAL)

clients/MidiHelpers.h

@@ -0,0 +1,29 @@
+#pragma once
+#include <cstdint>
+
+namespace midi {
+constexpr uint8_t statusMask { 0b11110000 };
+constexpr uint8_t channelMask { 0b00001111 };
+constexpr uint8_t noteOff { 0x80 };
+constexpr uint8_t noteOn { 0x90 };
+constexpr uint8_t polyphonicPressure { 0xA0 };
+constexpr uint8_t controlChange { 0xB0 };
+constexpr uint8_t programChange { 0xC0 };
+constexpr uint8_t channelPressure { 0xD0 };
+constexpr uint8_t pitchBend { 0xE0 };
+constexpr uint8_t systemMessage { 0xF0 };
+
+constexpr uint8_t status(uint8_t midiStatusByte)
+{
+    return midiStatusByte & statusMask;
+}
+constexpr uint8_t channel(uint8_t midiStatusByte)
+{
+    return midiStatusByte & channelMask;
+}
+
+constexpr int buildAndCenterPitch(uint8_t firstByte, uint8_t secondByte)
+{
+    return (int)(((unsigned int)secondByte << 7) + (unsigned int)firstByte) - 8192;
+}
+}

clients/external/fmidi

@@ -0,0 +1 @@
+Subproject commit f12d08d6ccd27d2580ec4e21717fbc3ab4b73a20

clients/jack_client.cpp

@@ -23,6 +23,7 @@
 
 #include "sfizz/Synth.h"
 #include "sfizz/Macros.h"
+#include "MidiHelpers.h"
 #include <absl/flags/parse.h>
 #include <absl/flags/flag.h>
 #include <absl/types/span.h>
@@ -44,33 +45,6 @@ static jack_port_t* outputPort1;
 static jack_port_t* outputPort2;
 static jack_client_t* client;
 
-namespace midi {
-constexpr uint8_t statusMask { 0b11110000 };
-constexpr uint8_t channelMask { 0b00001111 };
-constexpr uint8_t noteOff { 0x80 };
-constexpr uint8_t noteOn { 0x90 };
-constexpr uint8_t polyphonicPressure { 0xA0 };
-constexpr uint8_t controlChange { 0xB0 };
-constexpr uint8_t programChange { 0xC0 };
-constexpr uint8_t channelPressure { 0xD0 };
-constexpr uint8_t pitchBend { 0xE0 };
-constexpr uint8_t systemMessage { 0xF0 };
-
-constexpr uint8_t status(uint8_t midiStatusByte)
-{
-    return midiStatusByte & statusMask;
-}
-constexpr uint8_t channel(uint8_t midiStatusByte)
-{
-    return midiStatusByte & channelMask;
-}
-
-constexpr int buildAndCenterPitch(uint8_t firstByte, uint8_t secondByte)
-{
-    return (int)(((unsigned int)secondByte << 7) + (unsigned int)firstByte) - 8192;
-}
-}
-
 int process(jack_nframes_t numFrames, void* arg)
 {
     auto synth = reinterpret_cast<sfz::Synth*>(arg);

clients/sfizz_render.cpp

@@ -0,0 +1,208 @@
+
+#include <sndfile.hh>
+#include "sfizz/Synth.h"
+#include "sfizz/MathHelpers.h"
+#include "sfizz/SfzHelpers.h"
+#include "sfizz/SIMDHelpers.h"
+#include "MidiHelpers.h"
+#include "cxxopts.hpp"
+#include <fmidi/fmidi.h>
+#include <iostream>
+
+#define LOG_ERROR(ostream) std::cerr  << ostream << '\n'
+#define LOG_INFO(ostream) if (verbose) { std::cout << ostream << '\n'; }
+#define ERROR_IF(check, ostream) if ((check)) { LOG_ERROR(ostream); std::exit(-1); }
+
+struct CallbackData {
+    sfz::Synth& synth;
+    int trackIdx;
+    double lastCallTime;
+    double blockSizeInSeconds;
+    bool finished;
+};
+
+void midiCallback(const fmidi_event_t * event, void * cbdata)
+{
+    auto data = reinterpret_cast<CallbackData*>(cbdata);
+
+    if (event->type != fmidi_event_type::fmidi_event_message)
+        return;
+
+    switch (midi::status(event->data[0])) {
+        case midi::noteOff:
+            data->synth.noteOff(event->delta, event->data[1], event->data[2]);
+            break;
+        case midi::noteOn:
+            data->synth.noteOn(event->delta, event->data[1], event->data[2]);
+            break;
+        case midi::polyphonicPressure:
+            break;
+        case midi::controlChange:
+            data->synth.cc(event->delta, event->data[1], event->data[2]);
+            break;
+        case midi::programChange:
+            break;
+        case midi::channelPressure:
+            break;
+        case midi::pitchBend:
+            data->synth.pitchWheel(event->delta, midi::buildAndCenterPitch(event->data[1], event->data[2]));
+            break;
+        case midi::systemMessage:
+            break;
+        }
+}
+
+void finishedCallback(void * cbdata)
+{
+    auto data = reinterpret_cast<CallbackData*>(cbdata);
+    data->finished = true;
+}
+
+int main(int argc, char** argv)
+{
+    cxxopts::Options options("sfizz-render", "Render a midi file through an SFZ file using the sfizz library.");
+
+    unsigned blockSize { 1024 };
+    int sampleRate { 48000 };
+    int trackNumber { -1 };
+    bool verbose { false };
+    bool help { false };
+    bool useEOT { false };
+    int oversampling { 1 };
+
+    options.add_options()
+        ("sfz", "SFZ file", cxxopts::value<std::string>())
+        ("midi", "Input midi file", cxxopts::value<std::string>())
+        ("wav", "Output wav file", cxxopts::value<std::string>())
+        ("b,blocksize", "Block size for the sfizz callbacks", cxxopts::value(blockSize))
+        ("s,samplerate", "Output sample rate", cxxopts::value(sampleRate))
+        ("t,track", "Track number to use", cxxopts::value(trackNumber))
+        ("oversampling", "Internal oversampling factor", cxxopts::value(oversampling))
+        ("v,verbose", "Verbose output", cxxopts::value(verbose))
+        ("log", "Produce logs", cxxopts::value<std::string>())
+        ("use-eot", "End the rendering at the last End of Track Midi message", cxxopts::value(useEOT))
+        ("h,help", "Show help", cxxopts::value(help))
+    ;
+    auto params = [&]() {
+        try { return options.parse(argc, argv); }
+        catch (std::exception& e) {
+            LOG_ERROR(e.what());
+            std::exit(-1);
+        }
+    }();
+
+    if (help) {
+        std::cout << options.help();
+        std::exit(0);
+    }
+
+    ERROR_IF(params.count("sfz") != 1, "Please specify a single SFZ file using --sfz");
+    ERROR_IF(params.count("wav") != 1, "Please specify a single WAV file using --wav");
+    ERROR_IF(params.count("midi") != 1, "Please specify a single MIDI file using --midi");
+
+    fs::path sfzPath  = fs::current_path() / params["sfz"].as<std::string>();
+    fs::path outputPath  = fs::current_path() / params["wav"].as<std::string>();
+    fs::path midiPath  = fs::current_path() / params["midi"].as<std::string>();
+
+    ERROR_IF(!fs::exists(sfzPath) || !fs::is_regular_file(sfzPath),
+                    "SFZ file " << sfzPath.string() << " does not exist or is not a regular file");
+    ERROR_IF(!fs::exists(midiPath) || !fs::is_regular_file(midiPath),
+            "MIDI file " << midiPath.string() << " does not exist or is not a regular file");
+
+    if (fs::exists(outputPath)) {
+        LOG_INFO("Output file " << outputPath.string() << " already exists and will be erased.");
+    }
+
+    LOG_INFO("SFZ file:    " << sfzPath.string());
+    LOG_INFO("MIDI file:   " << midiPath.string());
+    LOG_INFO("Output file: " << outputPath.string());
+    LOG_INFO("Block size: " << blockSize);
+    LOG_INFO("Sample rate: " << sampleRate);
+
+    sfz::Synth synth;
+    synth.setSamplesPerBlock(blockSize);
+    synth.setSampleRate(sampleRate);
+    synth.enableFreeWheeling();
+
+    if (params.count("log") > 0)
+        synth.enableLogging(params["log"].as<std::string>());
+
+    const auto osFactor = [oversampling] {
+        switch (oversampling){
+        case 1:
+            return sfz::Oversampling::x1;
+        case 2:
+            return sfz::Oversampling::x2;
+        case 4:
+            return sfz::Oversampling::x4;
+        case 5:
+            return sfz::Oversampling::x8;
+        default:
+            LOG_ERROR("Bad oversampling factor: " << oversampling);
+            std::exit(-1);
+        }
+    }();
+    synth.setOversamplingFactor(osFactor);
+
+    ERROR_IF(!synth.loadSfzFile(sfzPath), "There was an error loading the SFZ file.");
+    LOG_INFO(synth.getNumRegions() << " regions in the SFZ.");
+
+    fmidi_smf_u midiFile { fmidi_smf_file_read(midiPath.c_str()) };
+    ERROR_IF(!midiFile, "Can't read " << midiPath);
+
+    const auto* midiInfo = fmidi_smf_get_info(midiFile.get());
+    ERROR_IF(!midiInfo, "Can't get info on the midi file");
+
+    LOG_INFO( midiInfo->track_count << " tracks in the SMF.");
+    ERROR_IF (trackNumber > midiInfo->track_count, "The track number " <<  trackNumber << " requested does not exist in the SMF file.");
+
+    if (trackNumber >= 0) {
+        LOG_INFO("-- Rendering only track number " <<  trackNumber);
+    }
+
+    if (useEOT) {
+        LOG_INFO("-- Cutting the rendering at the last MIDI End of Track message");
+    }
+
+    const auto trackIdx = trackNumber < 1 ? 0 : trackNumber - 1;
+
+    SndfileHandle outputFile (outputPath, SFM_WRITE, SF_FORMAT_WAV | SF_FORMAT_PCM_16, 2, sampleRate);
+    ERROR_IF(outputFile.error() != 0, "Error writing out the wav file: " << outputFile.strError());
+
+    auto sampleRateDouble = static_cast<double>(sampleRate);
+    double blockSizeInSeconds { blockSize / sampleRateDouble };
+    int numFramesWritten { 0 };
+    sfz::AudioBuffer<float> audioBuffer { 2, blockSize };
+    sfz::Buffer<float> interleavedBuffer { 2 * blockSize };
+
+    fmidi_player_u midiPlayer { fmidi_player_new(midiFile.get()) };
+    CallbackData callbackData { synth, trackIdx, 0.0, blockSizeInSeconds, false };
+    fmidi_player_event_callback(midiPlayer.get(), &midiCallback, &callbackData);
+    fmidi_player_finish_callback(midiPlayer.get(), &finishedCallback, &callbackData);
+
+    fmidi_player_start(midiPlayer.get());
+    while (!callbackData.finished) {
+        fmidi_player_tick(midiPlayer.get(), blockSizeInSeconds);
+        callbackData.lastCallTime += blockSizeInSeconds;
+        synth.renderBlock(audioBuffer);
+        sfz::writeInterleaved(audioBuffer.getConstSpan(0), audioBuffer.getConstSpan(1), absl::MakeSpan(interleavedBuffer));
+        numFramesWritten += outputFile.writef(interleavedBuffer.data(), blockSize);
+    }
+
+    if (!useEOT) {
+        auto averagePower = sfz::meanSquared<float>(interleavedBuffer);
+        while (averagePower > 1e-12f) {
+            callbackData.lastCallTime += blockSizeInSeconds;
+            synth.renderBlock(audioBuffer);
+            sfz::writeInterleaved(audioBuffer.getConstSpan(0), audioBuffer.getConstSpan(1), absl::MakeSpan(interleavedBuffer));
+            numFramesWritten += outputFile.writef(interleavedBuffer.data(), blockSize);
+            averagePower = sfz::meanSquared<float>(interleavedBuffer);
+        }
+    }
+
+    outputFile.writeSync();
+    LOG_INFO("Wrote " << callbackData.lastCallTime << " seconds of sound data in"
+              << outputPath.string() << " (" << numFramesWritten << " frames)");
+
+    return 0;
+}