Enum DataSource 

pub enum DataSource {
    File {
        path: PathBuf,
        data: BufReader<File>,
    },
    Memory(Cursor<Vec<u8>>),
    Raw {
        sample_rate: usize,
        channel_count: usize,
        samples: Vec<f32>,
    },
    RawStreaming(Box<dyn RawStreamingDataSource>),
}

Data source enumeration. Provides unified way of selecting data source for sound buffers. It can be either a file or memory block.

Variants

File

Data source is a file of any supported format.

Fields

path: PathBuf

Path to file.

data: BufReader<File>

Buffered file opened for read.

Memory(Cursor<Vec<u8>>)

Data source is a memory block. Memory block must be in valid format (wav or vorbis/ogg). This variant can be used together with virtual file system.

Raw

Raw samples in interleaved format with specified sample rate and channel count. Can be used for procedural sounds.

Notes

Cannot be used with streaming buffers - it makes no sense to stream data that is already loaded into memory.

Fields

sample_rate: usize

Sample rate, typical values 22050, 44100, 48000, etc.

channel_count: usize

Total amount of channels.

samples: Vec<f32>

Raw samples in interleaved format. Count of samples must be multiple to channel count, otherwise you’ll get error at attempt to use such buffer.

RawStreaming(Box<dyn RawStreamingDataSource>)

Raw streaming source.

Implementations

impl DataSource

pub async fn from_file<P>(path: P) -> Result<Self, FileLoadError>

where P: AsRef<Path>,

Tries to create new File data source from given path. May fail if file does not exists.

Examples found in repository

examples/streaming.rs (line 22)

fn main() {
    // Initialize sound engine with default output device.
    let engine = SoundEngine::new();

    // Initialize new sound context.
    let context = SoundContext::new();

    engine.lock().unwrap().add_context(context.clone());

    // Load sound buffer.
    let waterfall_buffer = SoundBufferResource::new_streaming(
        block_on(DataSource::from_file("examples/data/waterfall.ogg")).unwrap(),
    )
    .unwrap();

    // Create flat source (without spatial effects) using that buffer.
    let source = GenericSourceBuilder::new()
        .with_buffer(waterfall_buffer)
        .with_status(Status::Playing)
        .with_looping(true)
        .build_source()
        .unwrap();

    // Each sound sound must be added to context, context takes ownership on source
    // and returns pool handle to it by which it can be accessed later on if needed.
    let _source_handle: Handle<SoundSource> = context.state().add_source(source);

    thread::sleep(Duration::from_secs(30))
}

examples/play_sound.rs (lines 22-24)

fn main() {
    // Initialize sound engine with default output device.
    let engine = SoundEngine::new();

    // Create new context.
    let context = SoundContext::new();

    // Register context in the engine.
    engine.lock().unwrap().add_context(context.clone());

    // Load sound buffer.
    let door_open_buffer = SoundBufferResource::new_generic(
        rg3d_sound::futures::executor::block_on(DataSource::from_file(
            "examples/data/door_open.wav",
        ))
        .unwrap(),
    )
    .unwrap();

    // Create generic source (without spatial effects) using that buffer.
    let source = GenericSourceBuilder::new()
        .with_buffer(door_open_buffer)
        .with_status(Status::Playing)
        .build_source()
        .unwrap();

    // Each sound sound must be added to context, context takes ownership on source
    // and returns pool handle to it by which it can be accessed later on if needed.
    let _source_handle: Handle<SoundSource> = context.state().add_source(source);

    // Wait until sound will play completely.
    thread::sleep(Duration::from_secs(3));
}

examples/play_spatial_sound.rs (line 26)

fn main() {
    // Initialize sound engine with default output device.
    let engine = SoundEngine::new();

    // Initialize new sound context.
    let context = SoundContext::new();

    engine.lock().unwrap().add_context(context.clone());

    // Load sound buffer.
    let drop_buffer = SoundBufferResource::new_generic(
        block_on(DataSource::from_file("examples/data/drop.wav")).unwrap(),
    )
    .unwrap();

    // Create spatial source - spatial sources can be positioned in space.
    let source = SpatialSourceBuilder::new(
        GenericSourceBuilder::new()
            .with_buffer(drop_buffer)
            .with_looping(true)
            .with_status(Status::Playing)
            .build()
            .unwrap(),
    )
    .build_source();

    // Each sound sound must be added to context, context takes ownership on source
    // and returns pool handle to it by which it can be accessed later on if needed.
    let source_handle: Handle<SoundSource> = context.state().add_source(source);

    // Move sound around listener for some time.
    let start_time = time::Instant::now();
    let mut angle = 0.0f32;
    while (time::Instant::now() - start_time).as_secs() < 11 {
        if let SoundSource::Spatial(spatial) = context.state().source_mut(source_handle) {
            let axis = Vector3::y_axis();
            let rotation_matrix =
                UnitQuaternion::from_axis_angle(&axis, angle.to_radians()).to_homogeneous();
            spatial.set_position(
                rotation_matrix
                    .transform_point(&Point3::new(0.0, 0.0, 3.0))
                    .coords,
            );
        }
        angle += 3.6;

        // Limit rate of updates.
        thread::sleep(Duration::from_millis(100));
    }
}

examples/write_wav.rs (lines 21-23)

fn main() {
    // Initialize sound engine without output device.
    let engine = SoundEngine::without_device();

    // Create new context.
    let context = SoundContext::new();

    // Register context in the engine.
    engine.lock().unwrap().add_context(context.clone());

    // Load sound buffer.
    let door_open_buffer = SoundBufferResource::new_generic(
        rg3d_sound::futures::executor::block_on(DataSource::from_file(
            "examples/data/door_open.wav",
        ))
        .unwrap(),
    )
    .unwrap();

    // Create generic source (without spatial effects) using that buffer.
    let source = GenericSourceBuilder::new()
        .with_buffer(door_open_buffer)
        .with_status(Status::Playing)
        .build_source()
        .unwrap();

    // Each sound sound must be added to context, context takes ownership on source
    // and returns pool handle to it by which it can be accessed later on if needed.
    let _source_handle: Handle<SoundSource> = context.state().add_source(source);

    // Create output wav file. The sample rate is currently fixed.
    let wav_spec = hound::WavSpec {
        channels: 2,
        sample_rate: rg3d_sound::context::SAMPLE_RATE,
        bits_per_sample: 32,
        sample_format: hound::SampleFormat::Float,
    };
    let mut wav_writer = hound::WavWriter::create("output.wav", wav_spec).unwrap();

    // Create an output buffer.
    let buf_len = SoundEngine::render_buffer_len();
    let mut buf = vec![(0.0f32, 0.0f32); buf_len];
    let mut samples_written = 0;

    // Wait until sound will play completely.
    while samples_written < 3 * rg3d_sound::context::SAMPLE_RATE {
        engine.lock().unwrap().render(&mut buf);
        for &(l, r) in buf.iter() {
            wav_writer.write_sample(l).unwrap();
            wav_writer.write_sample(r).unwrap();
        }
        samples_written += buf_len as u32;
    }

    wav_writer.finalize().unwrap();
}

examples/listener.rs (line 26)

fn main() {
    // Initialize sound engine with default output device.
    let engine = SoundEngine::new();

    // Initialize new sound context.
    let context = SoundContext::new();

    engine.lock().unwrap().add_context(context.clone());

    // Load sound buffer.
    let drop_buffer = SoundBufferResource::new_generic(
        block_on(DataSource::from_file("examples/data/drop.wav")).unwrap(),
    )
    .unwrap();

    // Create spatial source - spatial sources can be positioned in space.
    let source = SpatialSourceBuilder::new(
        GenericSourceBuilder::new()
            .with_buffer(drop_buffer)
            .with_looping(true)
            .with_status(Status::Playing)
            .build()
            .unwrap(),
    )
    .build_source();

    // Each sound sound must be added to context, context takes ownership on source
    // and returns pool handle to it by which it can be accessed later on if needed.
    context.state().add_source(source);

    // Rotate listener for some time.
    let start_time = time::Instant::now();
    let mut angle = 0.0f32;
    while (time::Instant::now() - start_time).as_secs() < 20 {
        // Separate scope for update to make sure that mutex lock will be released before
        // thread::sleep will be called so context can actually work in background thread.
        {
            let mut context = context.state();

            let listener = context.listener_mut();

            // Define up-axis of listener.
            let up = Vector3::y_axis();

            // And rotate look axis.
            let rotation_matrix =
                UnitQuaternion::from_axis_angle(&up, angle.to_radians()).to_homogeneous();
            let look = rotation_matrix
                .transform_point(&Point3::new(0.0, 0.0, 1.0))
                .coords;

            // Finally combine axes. _lh suffix here means that we using left-handed coordinate system.
            // there is also _rh (right handed) version. Also basis can be set directly by using `set_basis`
            listener.set_orientation_lh(look, *up);

            // Move listener a bit back from sound source.
            listener.set_position(Vector3::new(0.0, 0.0, -2.0));

            // Continue rotation.
            angle += 2.0;
        }

        // Limit rate of updates.
        thread::sleep(Duration::from_millis(100));
    }
}

examples/hrtf.rs (line 36)

fn main() {
    // Initialize sound engine with default output device.
    let engine = SoundEngine::new();

    let hrir_sphere =
        HrirSphere::from_file("examples/data/IRC_1002_C.bin", context::SAMPLE_RATE).unwrap();

    // Initialize new sound context with default output device.
    let context = SoundContext::new();

    engine.lock().unwrap().add_context(context.clone());

    // Set HRTF renderer instead of default.
    context
        .state()
        .set_renderer(Renderer::HrtfRenderer(HrtfRenderer::new(hrir_sphere)));

    // Create some sounds.
    let sound_buffer = SoundBufferResource::new_generic(
        block_on(DataSource::from_file("examples/data/door_open.wav")).unwrap(),
    )
    .unwrap();
    let source = SpatialSourceBuilder::new(
        GenericSourceBuilder::new()
            .with_buffer(sound_buffer)
            .with_status(Status::Playing)
            .build()
            .unwrap(),
    )
    .build_source();
    context.state().add_source(source);

    let sound_buffer = SoundBufferResource::new_generic(
        block_on(DataSource::from_file("examples/data/helicopter.wav")).unwrap(),
    )
    .unwrap();
    let source = SpatialSourceBuilder::new(
        GenericSourceBuilder::new()
            .with_buffer(sound_buffer)
            .with_status(Status::Playing)
            .with_looping(true)
            .build()
            .unwrap(),
    )
    .build_source();
    let source_handle = context.state().add_source(source);

    // Move source sound around listener for some time.
    let start_time = time::Instant::now();
    let mut angle = 0.0f32;
    while (time::Instant::now() - start_time).as_secs() < 360 {
        // Separate scope for update to make sure that mutex lock will be released before
        // thread::sleep will be called so context can actually work in background thread.
        {
            if let SoundSource::Spatial(spatial) = context.state().source_mut(source_handle) {
                let axis = Vector3::y_axis();
                let rotation_matrix =
                    UnitQuaternion::from_axis_angle(&axis, angle.to_radians()).to_homogeneous();
                spatial.set_position(
                    rotation_matrix
                        .transform_point(&Point3::new(0.0, 0.0, 3.0))
                        .coords,
                );
            }

            angle += 1.6;

            println!(
                "Sound render time {:?}",
                context.state().full_render_duration()
            );
        }

        // Limit rate of updates.
        thread::sleep(Duration::from_millis(100));
    }
}

Additional examples can be found in:

• examples/reverb.rs

pub fn from_memory(data: Vec<u8>) -> Self

Creates new data source from given memory block. This function does not checks if this is valid source or not. Data source validity will be checked on first use.

Trait Implementations

impl Debug for DataSource

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Read for DataSource

fn read(&mut self, buf: &mut [u8]) -> Result<usize, Error>

Pull some bytes from this source into the specified buffer, returning how many bytes were read.

fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> Result<usize, Error>

Like read, except that it reads into a slice of buffers.

fn is_read_vectored(&self) -> bool

🔬This is a nightly-only experimental API. (can_vector)

Determines if this Reader has an efficient read_vectored implementation.

fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize, Error>

Reads all bytes until EOF in this source, placing them into buf.

fn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>

Reads all bytes until EOF in this source, appending them to buf.

fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), Error>

Reads the exact number of bytes required to fill buf.

fn read_buf(&mut self, buf: BorrowedCursor<'_>) -> Result<(), Error>

🔬This is a nightly-only experimental API. (read_buf)

Pull some bytes from this source into the specified buffer.

fn read_buf_exact(&mut self, cursor: BorrowedCursor<'_>) -> Result<(), Error>

🔬This is a nightly-only experimental API. (read_buf)

Reads the exact number of bytes required to fill cursor.

fn by_ref(&mut self) -> &mut Self

where Self: Sized,

Creates a “by reference” adapter for this instance of Read.

fn bytes(self) -> Bytes<Self>

where Self: Sized,

Transforms this Read instance to an Iterator over its bytes.

fn chain<R>(self, next: R) -> Chain<Self, R>

where R: Read, Self: Sized,

Creates an adapter which will chain this stream with another.

fn take(self, limit: u64) -> Take<Self>

where Self: Sized,

Creates an adapter which will read at most limit bytes from it.

fn read_array<const N: usize>(&mut self) -> Result<[u8; N], Error>

where Self: Sized,

🔬This is a nightly-only experimental API. (read_array)

Read and return a fixed array of bytes from this source.

impl Seek for DataSource

fn seek(&mut self, pos: SeekFrom) -> Result<u64, Error>

Seek to an offset, in bytes, in a stream.

fn rewind(&mut self) -> Result<(), Error>

Rewind to the beginning of a stream.

fn stream_len(&mut self) -> Result<u64, Error>

🔬This is a nightly-only experimental API. (seek_stream_len)

Returns the length of this stream (in bytes).

fn stream_position(&mut self) -> Result<u64, Error>

Returns the current seek position from the start of the stream.

fn seek_relative(&mut self, offset: i64) -> Result<(), Error>

Seeks relative to the current position.