snapshot

libraries/audio-tools/tests-cmake/pipeline/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.20)
+
+
+# set the project name
+project(pipeline)
+set (CMAKE_CXX_STANDARD 11)
+set (DCMAKE_CXX_FLAGS "-Werror")
+set (CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -O0 -ldl -lpthread -lm")
+set (CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -O0 -ldl -lpthread -lm")
+
+# Emulator is not necessary for -DIS_MIN_DESKTOP
+set(ADD_ARDUINO_EMULATOR OFF CACHE BOOL "Add Arduino Emulator Library") 
+set(ADD_PORTAUDIO OFF CACHE BOOL "No Portaudio") 
+
+
+# Build with arduino-audio-tools
+if(CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
+    add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/../.. ${CMAKE_CURRENT_BINARY_DIR}/arduino-audio-tools )
+endif()
+
+# Download miniaudio.h
+file(DOWNLOAD https://raw.githubusercontent.com/mackron/miniaudio/master/miniaudio.h
+    ${CMAKE_CURRENT_SOURCE_DIR}/miniaudio.h)
+
+
+# build sketch as executable
+add_executable (pipeline pipeline.cpp)
+
+# set preprocessor defines
+target_compile_definitions(pipeline PUBLIC -DIS_MIN_DESKTOP)
+
+# specify libraries
+target_link_libraries(pipeline arduino-audio-tools)
+
+# access to miniaudio in sketch directory
+target_include_directories(pipeline PRIVATE ${CMAKE_CURRENT_SOURCE_DIR})
+

libraries/audio-tools/tests-cmake/pipeline/pipeline.cpp

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+// Simple wrapper for Arduino sketch to compilable with cpp in cmake
+#include "AudioTools.h"
+#include "AudioTools/AudioLibs/MiniAudioStream.h"
+#include "AudioTools/AudioLibs/StdioStream.h"
+
+int16_t AR1[] = { 0, 4560, 9031, 13327, 17363, 21062, 24350, 27165, 29450, 31163, 32269, 32747, 32587, 31793, 30381, 28377, 25820, 22761, 19259, 15383, 11206, 6812, 2285, -2285, -6812, -11206, -15383, -19259, -22761, -25820, -28377, -30381, -31793, -32587, -32747, -32269, -31163, -29450, -27165, -24350, -21062, -17363, -13327, -9031, -4560 };
+
+AudioInfo info(44100, 2, 16);
+GeneratorFromArray<int16_t> wave(AR1, 0, false);
+GeneratedSoundStream<int16_t> snd(wave);  
+Pipeline pip;
+ResampleStream resample;
+VolumeStream volume;
+ChannelFormatConverterStream channels;
+NumberFormatConverterStream bits;
+MiniAudioStream out;                         // Output to MiniAudioStream
+//I2SStream i2s;
+StreamCopy copier(out, pip);
+
+// Arduino Setup
+void setup(void) {
+  //Serial.begin(115200);
+  AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Info);
+
+  out.begin();
+  resample.setStepSize(0.4f);
+  volume.setVolume(0.5);
+  channels.setToChannels(1);
+  bits.setToBits(32);
+  copier.setSynchAudioInfo(true);
+
+  pip.setInput(snd);
+  pip.add(resample);
+  pip.add(volume);
+  pip.add(channels);
+  pip.add(bits);
+  //pip.addNotifyAudioChange(out);
+  Serial.println("*** begin ***");
+  pip.begin(info);
+
+}
+
+void loop() {
+  copier.copy();
+}