c

C Demos

Compatibility

You need a C99-compatible compiler to build these demos.

Requirements

• The demo requires CMake version 3.13 or higher.
• For Windows Only: MinGW is required to build the demo.

AccessKey

Porcupine requires a valid Picovoice AccessKey at initialization. AccessKey acts as your credentials when using Porcupine SDKs. You can get your AccessKey for free. Make sure to keep your AccessKey secret. Signup or Login to Picovoice Console to get your AccessKey.

Build Linux/MacOS

cmake -S demo/c/. -B demo/c/build && cmake --build demo/c/build --target porcupine_demo_mic

Build Windows

cmake -S demo/c/. -B demo/c/build -G "MinGW Makefiles" && cmake --build demo/c/build --target porcupine_demo_mic

Run

Usage

Running the executable without any commandline arguments prints the usage info to the console.

Linux, macOS, Raspberry Pi

./demo/c/build/porcupine_demo_mic 
Usage : ./demo/c/build/porcupine_demo_mic -l LIBRARY_PATH -m MODEL_PATH -k KEYWORD_PATH -t SENSITIVITY -a ACCESS_KEY -d AUDIO_DEVICE_INDEX
        ./demo/c/build/porcupine_demo_mic [-s, --show_audio_devices]

Windows

.\\demo\\c\\build\\porcupine_demo_mic.exe
Usage : .\\demo\\c\\build\\porcupine_demo_mic.exe -l LIBRARY_PATH -m MODEL_PATH -k KEYWORD_PATH -t SENSITIVITY -a ACCESS_KEY -d AUDIO_DEVICE_INDEX
        .\\demo\\c\\build\\porcupine_demo_mic.exe [-s, --show_audio_devices]

Show Audio Devices

The following commands shows the available audio input devices to the console.

Linux, macOS, Raspberry Pi

./demo/c/build/porcupine_demo_mic --show_audio_devices

Windows

.\\demo\\c\\build\\porcupine_demo_mic.exe --show_audio_devices

Wake Phrase

The following commands start up a microphone audio stream and listens for the wake phrase "porcupine". Replace ${AUDIO_DEVICE_INDEX} with the index of the audio device and ${ACCESS_KEY} with your AccessKey.

Linux

./demo/c/build/porcupine_demo_mic \
-l lib/linux/x86_64/libpv_porcupine.so -m lib/common/porcupine_params.pv \
-k resources/keyword_files/linux/porcupine_linux.ppn -t 0.5 \
-a ${ACCESS_KEY} -d ${AUDIO_DEVICE_INDEX}

macOS

# Macos with Intel Chip
./demo/c/build/porcupine_demo_mic \
-l lib/mac/x86_64/libpv_porcupine.dylib -m lib/common/porcupine_params.pv \
-k resources/keyword_files/mac/porcupine_mac.ppn -t 0.5 \
-a ${ACCESS_KEY} -d ${AUDIO_DEVICE_INDEX}

# Macos with Apple Chip
./demo/c/build/porcupine_demo_mic \
-l lib/mac/arm64/libpv_porcupine.dylib -m lib/common/porcupine_params.pv \
-k resources/keyword_files/mac/porcupine_mac.ppn -t 0.5 \
-a ${ACCESS_KEY} -d ${AUDIO_DEVICE_INDEX}

Raspberry Pi

Replace ${PROCESSOR} with one of the Raspberry Pi processors defined here (e.g., for Raspberry Pi 4 this would be "cortex-a72") and run:

./demo/c/build/porcupine_demo_mic \
-l lib/raspberry-pi/${PROCESSOR}/libpv_porcupine.so -m lib/common/porcupine_params.pv \
-k resources/keyword_files/raspberry-pi/porcupine_raspberry-pi.ppn -t 0.5 \
-a ${ACCESS_KEY} -d ${AUDIO_DEVICE_INDEX}

Windows

.\\demo\\c\\build\\porcupine_demo_mic.exe -l lib/windows/amd64/libpv_porcupine.dll -m lib/common/porcupine_params.pv -k resources/keyword_files/windows/porcupine_windows.ppn -t 0.5 -a ${ACCESS_KEY} -d ${AUDIO_DEVICE_INDEX}

File Demo

Build

cmake -S demo/c/. -B demo/c/build && cmake --build demo/c/build --target porcupine_demo_file

Run

Usage

Running the executable without any commandline arguments prints the usage info to the console.

Linux, macOS, Raspberry Pi

./demo/c/build/porcupine_demo_file 
Usage : ./demo/c/build/porcupine_demo_file -l LIBRARY_PATH -m MODEL_PATH -k KEYWORD_PATH -t SENSITIVITY -a ACCESS_KEY -w WAV_PATH

Windows

.\\demo\\c\\build\\porcupine_demo_file.exe
Usage : .\\demo\\c\\build\\porcupine_demo_file.exe -l LIBRARY_PATH -m MODEL_PATH -k KEYWORD_PATH -t SENSITIVITY -a ACCESS_KEY -w WAV_PATH

Wake Phrase

Note that the demo expects a single-channel WAV file with a sampling rate of 16kHz and 16-bit linear PCM encoding.

Replace ${ACCESS_KEY} with your AccessKey.

Linux

./demo/c/build/porcupine_demo_file -l lib/linux/x86_64/libpv_porcupine.so -m lib/common/porcupine_params.pv \
-k resources/keyword_files/linux/americano_linux.ppn -t 0.5 -w resources/audio_samples/multiple_keywords.wav \
-a ${ACCESS_KEY}

macOS

# Macos with Intel Chip
./demo/c/build/porcupine_demo_file -l lib/mac/x86_64/libpv_porcupine.dylib -m lib/common/porcupine_params.pv \
-k resources/keyword_files/mac/americano_mac.ppn -t 0.5 -w resources/audio_samples/multiple_keywords.wav \
-a ${ACCESS_KEY}

# Macos with Apple Chip
./demo/c/build/porcupine_demo_file -l lib/mac/arm64/libpv_porcupine.dylib -m lib/common/porcupine_params.pv \
-k resources/keyword_files/mac/americano_mac.ppn -t 0.5 -w resources/audio_samples/multiple_keywords.wav \
-a ${ACCESS_KEY}

Raspberry Pi

Replace ${PROCESSOR} with one of the Raspberry Pi processors defined here (e.g., for Raspberry Pi 4 this would be "cortex-a72") and run:

./demo/c/build/porcupine_demo_file -l lib/raspberry-pi/${PROCESSOR}/libpv_porcupine.so -m lib/common/porcupine_params.pv \
-k resources/keyword_files/raspberry-pi/americano_raspberry-pi.ppn -t 0.5 -w resources/audio_samples/multiple_keywords.wav \
-a ${ACCESS_KEY}

Windows

.\\demo\\c\\build\\porcupine_demo_file.exe -l lib/windows/amd64/libpv_porcupine.dll -m lib/common/porcupine_params.pv -k resources/keyword_files/windows/americano_windows.ppn -t 0.5 -w resources/audio_samples/multiple_keywords.wav -a ${ACCESS_KEY}