PCMSound utility functions | makeMono | makeStereo | append (#272)

* update README

* PCMSound makeMono, makeStereo, append

* code rev

* add test

* code rev

* code rev

* update version

Author: Raffaello

CMakeLists.txt

@@ -5,7 +5,7 @@ if(DEFINED ENV{VCPKG_ROOT} AND NOT DEFINED CMAKE_TOOLCHAIN_FILE)
 endif()
 
 
-project ("sdl2-hyper-sonic-drivers" VERSION 0.13.4 DESCRIPTION "SDL2 based Hyper-Sonic Drivers for emulating old soundcards")
+project ("sdl2-hyper-sonic-drivers" VERSION 0.14.0 DESCRIPTION "SDL2 based Hyper-Sonic Drivers for emulating old soundcards")
 include (TestBigEndian)
 TEST_BIG_ENDIAN(IS_BIG_ENDIAN)
 if(IS_BIG_ENDIAN)

README.md

@@ -56,7 +56,7 @@ At the moment the only implemented emulators are OPL chips.
 ### Adlib/Sound Blaster PRO 2.0 chips
 
 - [x] Mame OPL2
-- [x] Mame OPL3
+- [ ] Mame OPL3
 - [x] DosBox OPL2
 - [x] DosBox Dual OPL2
 - [x] DosBox OPL3

sdl2-hyper-sonic-drivers/CMakeLists.txt

@@ -177,6 +177,7 @@ target_sources(${LIB_NAME} PRIVATE
     ${CMAKE_CURRENT_SOURCE_DIR}/src/HyperSonicDrivers/utils/constants.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/src/HyperSonicDrivers/utils/endianness.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/src/HyperSonicDrivers/utils/opl.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/src/HyperSonicDrivers/utils/sound.cpp
     # --- #
     ${CMAKE_CURRENT_SOURCE_DIR}/src/HyperSonicDrivers/utils/ILogger.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/src/HyperSonicDrivers/utils/sdl2/Logger.cpp
@@ -211,14 +212,7 @@ unset(LIB_VER)
 
 # Add source to this project's executable.
 add_executable(sdl2-hyper-sonic-drivers "sdl2-hyper-sonic-drivers.cpp")
-#target_sources(sdl2-sonic-drivers PUBLIC
-    # --- #
-    #${CMAKE_CURRENT_SOURCE_DIR}/src/files/IFFFile.cpp
-    #${CMAKE_CURRENT_SOURCE_DIR}/src/files/XMIFile.cpp
-    #${CMAKE_CURRENT_SOURCE_DIR}/src/files/MIDFile.cpp
-#)
-
-target_link_libraries(sdl2-hyper-sonic-drivers PRIVATE  ${LIB_SDL2main} hyper-sonic-drivers-static)
+target_link_libraries(sdl2-hyper-sonic-drivers PRIVATE ${LIB_SDL2main} hyper-sonic-drivers-static)
 
 if(MSVC)
 # @see https://docs.microsoft.com/en-us/cpp/build/reference/compiler-options-listed-by-category?view=vs-2019

sdl2-hyper-sonic-drivers/sdl2-hyper-sonic-drivers.cpp

@@ -2,6 +2,7 @@
 // TODO: delete this file and its target, this is kinda scratch pad
 
 #include <iostream>
+#include <memory>
 
 #include <SDL2/SDL.h>
 
@@ -32,6 +33,11 @@
 #include <mt32emu/c_interface/cpp_interface.h>
 #include <HyperSonicDrivers/hardware/mt32/MT32.hpp>
 
+#include <HyperSonicDrivers/utils/sound.hpp>
+#include <HyperSonicDrivers/drivers/PCMDriver.hpp>
+#include <HyperSonicDrivers/audio/PCMSound.hpp>
+
+
 using namespace std;
 using namespace HyperSonicDrivers;
 
@@ -383,6 +389,27 @@ void testMT32()
     //    utils::delayMillis(1000);
 }
 
+
+void pcm_sound_append()
+{
+    auto mixer = audio::make_mixer<audio::sdl2::Mixer>(8, 44100, 1024);
+    files::WAVFile w1("test/fixtures/test_renderer_adlib_mame2.wav");
+    
+    mixer->init();
+    auto s1 = w1.getSound();
+    auto s1b = w1.getSound();
+    //auto s2a = utils::makeMono(s1);
+    //auto s2b = utils::makeStereo(s1);
+    auto s2 = utils::append(s1, s1);
+    drivers::PCMDriver drv(mixer);
+
+    drv.play(s2);
+    while (drv.isPlaying())
+    {
+        utils::delayMillis(100);
+    }
+}
+
 int main(int argc, char* argv[])
 {
     //newMixerTest();
@@ -391,6 +418,8 @@ int main(int argc, char* argv[])
     //rendererMIDI();
     //midi_adlib();
     //testMT32();
+
+    pcm_sound_append();
     return 0;
     //sdlMixer();
     //SDL_Delay(100);

sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/audio/PCMSound.hpp

@@ -18,6 +18,7 @@ namespace HyperSonicDrivers::audio
         PCMSound(PCMSound&) = delete;
         PCMSound(PCMSound&&) = delete;
         PCMSound& operator=(PCMSound&) = delete;
+
         PCMSound(
             const mixer::eChannelGroup group,
             const bool isStereo,
@@ -26,10 +27,12 @@ namespace HyperSonicDrivers::audio
             const std::shared_ptr<int16_t[]> &data
         );
 
+        bool append(const PCMSound* sound2) noexcept;
+
         const mixer::eChannelGroup group;
         const bool stereo;
         const uint32_t freq;
-        uint32_t dataSize;
-        std::shared_ptr<int16_t[]> data;
+        const uint32_t dataSize;
+        const std::shared_ptr<int16_t[]> data;
     };
 }

sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/drivers/PCMDriver.hpp

@@ -34,7 +34,6 @@ namespace HyperSonicDrivers::drivers
         void stop(const std::shared_ptr<audio::PCMSound>& sound, const bool releaseEndedStreams = true);
         void stop() noexcept;
 
-
         const uint8_t max_streams;
     private:
         std::shared_ptr<audio::IMixer> m_mixer;

sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/utils/algorithms.hpp

@@ -92,6 +92,7 @@ namespace HyperSonicDrivers::utils
     /// wrapper, helper function
     /// </summary>
     std::string chars_vector_to_string(const std::vector<uint8_t>& e);
+
     /// <summary>
     /// Skip first char
     /// </summary>

sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/utils/sound.cpp

@@ -0,0 +1,64 @@
+#include <cstdint>
+#include <HyperSonicDrivers/utils/sound.hpp>
+#include <HyperSonicDrivers/audio/converters/LinearRateConverter.hpp>
+
+namespace HyperSonicDrivers::utils
+{
+    std::shared_ptr<audio::PCMSound> makeMono(const std::shared_ptr<audio::PCMSound>& sound)
+    {
+        if (!sound->stereo)
+            return sound;
+
+        const uint32_t monoDataSize = sound->dataSize / 2;
+
+        auto monoData = std::make_shared<int16_t[]>(monoDataSize);
+        for (uint32_t i = 0, j = 0; i < sound->dataSize; i += 2, j++)
+        {
+            monoData[j] = (sound->data[i] + sound->data[i + 1]) / 2;
+        }
+
+        return std::make_shared<audio::PCMSound>(sound->group, false, sound->freq, monoDataSize, monoData);
+    }
+
+    std::shared_ptr<audio::PCMSound> makeStereo(const std::shared_ptr<audio::PCMSound>& sound)
+    {
+        if (sound->stereo)
+            return sound;
+
+        const uint32_t stereoDataSize = sound->dataSize * 2;
+        auto stereoData = std::make_shared<int16_t[]>(stereoDataSize);
+        for (uint32_t i = 0, j = 0; i < sound->dataSize; i++, j += 2)
+        {
+            stereoData[j] = stereoData[j + 1] = sound->data[i];
+        }
+
+        return std::make_shared<audio::PCMSound>(sound->group, true, sound->freq, stereoDataSize, stereoData);
+    }
+
+    std::shared_ptr<audio::PCMSound> append(
+        const std::shared_ptr<audio::PCMSound>& sound1,
+        const std::shared_ptr<audio::PCMSound>& sound2)
+    {
+        std::shared_ptr<audio::PCMSound> s2;
+
+        if (sound1->stereo)
+            s2 = makeStereo(sound2);
+        else
+            s2 = makeMono(sound2);
+
+        if (sound1->freq != sound2->freq)
+        {
+            // TODO:
+            // use covert frequency/ sample rate libraries for this ?
+            utils::throwLogC<std::runtime_error>("different frequency, not implemented yet");
+        }
+
+        const uint32_t dataSize = sound1->dataSize + s2->dataSize;
+        auto data = std::make_shared<int16_t[]>(dataSize);
+
+        memcpy(data.get(), sound1->data.get(), sound1->dataSize * sizeof(int16_t));
+        memcpy(&data[sound1->dataSize], s2->data.get(), s2->dataSize * sizeof(int16_t));
+
+        return std::make_shared<audio::PCMSound>(sound1->group, sound1->stereo, sound1->freq, dataSize, data);
+    }
+}

sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/utils/sound.hpp

@@ -0,0 +1,27 @@
+#pragma once
+
+#include <memory>
+#include <HyperSonicDrivers/audio/PCMSound.hpp>
+
+namespace HyperSonicDrivers::utils
+{
+    /**
+    * @returns a new mono PCMSound if the parameter is stereo
+    *          otherwise returns the parameter itself.
+    **/
+    std::shared_ptr<audio::PCMSound> makeMono(const std::shared_ptr<audio::PCMSound>& sound);
+
+    /**
+    * @returns a new stereo PCMSound if the parameter is mono
+    *          otherwise returns the parameter itself.
+    **/
+    std::shared_ptr<audio::PCMSound> makeStereo(const std::shared_ptr<audio::PCMSound>& sound);
+ 
+    /**
+    * @returns sound1 + sound2.
+    *          it converts sound2 to the same freq and mono/stereo of sound1
+    **/
+    std::shared_ptr<audio::PCMSound> append(
+        const std::shared_ptr<audio::PCMSound>& sound1,
+        const std::shared_ptr<audio::PCMSound>& sound2);
+}

sdl2-hyper-sonic-drivers/test/HyperSonicDrivers/CMakeLists.txt

@@ -73,6 +73,12 @@ macro_test(
     LINKS_PRIVATE hyper-sonic-drivers-static
 )
 
+macro_test(
+    EXE TestSound
+    FILES "utils/TestSound.cpp"
+    LINKS_PRIVATE hyper-sonic-drivers-static
+)
+
 macro_test(
     EXE TestPCSpeaker
     FILES "hardware/TestPCSpeaker.cpp"