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Merge pull request #127 from CapSoftware/raw-pixel-buffers
raw pixel buffers
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| Original file line number | Diff line number | Diff line change |
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| @@ -1,3 +1,5 @@ | ||
| #![allow(non_upper_case_globals)] | ||
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| pub use screencapturekit_sys::os_types::base::*; | ||
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| #[repr(C)] | ||
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,191 @@ | ||
| use core::slice; | ||
| use core_video_sys::{ | ||
| CVPixelBufferGetBaseAddress, CVPixelBufferGetBaseAddressOfPlane, CVPixelBufferGetBytesPerRow, | ||
| CVPixelBufferGetBytesPerRowOfPlane, CVPixelBufferGetHeight, CVPixelBufferGetHeightOfPlane, | ||
| CVPixelBufferGetPlaneCount, CVPixelBufferGetWidth, CVPixelBufferGetWidthOfPlane, | ||
| CVPixelBufferLockBaseAddress, CVPixelBufferRef, CVPixelBufferUnlockBaseAddress, | ||
| }; | ||
| use screencapturekit::{cm_sample_buffer::CMSampleBuffer, sc_types::SCFrameStatus}; | ||
| use screencapturekit_sys::cm_sample_buffer_ref::CMSampleBufferGetImageBuffer; | ||
| use std::{ops::Deref, sync::mpsc}; | ||
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| use crate::capturer::{engine::ChannelItem, RawCapturer}; | ||
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| pub struct PixelBuffer { | ||
| display_time: u64, | ||
| width: usize, | ||
| height: usize, | ||
| bytes_per_row: usize, | ||
| buffer: CMSampleBuffer, | ||
| } | ||
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| impl PixelBuffer { | ||
| pub fn display_time(&self) -> u64 { | ||
| self.display_time | ||
| } | ||
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| pub fn width(&self) -> usize { | ||
| self.width | ||
| } | ||
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| pub fn height(&self) -> usize { | ||
| self.height | ||
| } | ||
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| pub fn buffer(&self) -> &CMSampleBuffer { | ||
| &self.buffer | ||
| } | ||
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| pub fn bytes_per_row(&self) -> usize { | ||
| self.bytes_per_row | ||
| } | ||
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| pub fn data(&self) -> PixelBufferData { | ||
| unsafe { | ||
| let pixel_buffer = sample_buffer_to_pixel_buffer(&self.buffer); | ||
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| CVPixelBufferLockBaseAddress(pixel_buffer, 0); | ||
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| let base_address = CVPixelBufferGetBaseAddress(pixel_buffer); | ||
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| PixelBufferData { | ||
| buffer: pixel_buffer, | ||
| data: slice::from_raw_parts( | ||
| base_address as *mut _, | ||
| self.bytes_per_row * self.height, | ||
| ), | ||
| } | ||
| } | ||
| } | ||
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| pub fn planes(&self) -> Vec<Plane> { | ||
| unsafe { | ||
| let pixel_buffer = sample_buffer_to_pixel_buffer(&self.buffer); | ||
| let count = CVPixelBufferGetPlaneCount(pixel_buffer); | ||
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| CVPixelBufferLockBaseAddress(pixel_buffer, 0); | ||
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| (0..count) | ||
| .map(|i| Plane { | ||
| buffer: pixel_buffer, | ||
| width: CVPixelBufferGetWidthOfPlane(pixel_buffer, i), | ||
| height: CVPixelBufferGetHeightOfPlane(pixel_buffer, i), | ||
| bytes_per_row: CVPixelBufferGetBytesPerRowOfPlane(pixel_buffer, i), | ||
| index: i, | ||
| }) | ||
| .collect() | ||
| } | ||
| } | ||
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| pub(crate) fn new(item: ChannelItem) -> Option<Self> { | ||
| unsafe { | ||
| let display_time = pixel_buffer_display_time(&item.0); | ||
| let pixel_buffer = sample_buffer_to_pixel_buffer(&item.0); | ||
| let (width, height) = pixel_buffer_bounds(pixel_buffer); | ||
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| match item.0.frame_status { | ||
| SCFrameStatus::Complete | SCFrameStatus::Started | SCFrameStatus::Idle => { | ||
| Some(Self { | ||
| display_time, | ||
| width, | ||
| height, | ||
| bytes_per_row: pixel_buffer_bytes_per_row(pixel_buffer), | ||
| buffer: item.0, | ||
| }) | ||
| } | ||
| _ => None, | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| #[derive(Debug)] | ||
| pub struct Plane { | ||
| buffer: CVPixelBufferRef, | ||
| index: usize, | ||
| width: usize, | ||
| height: usize, | ||
| bytes_per_row: usize, | ||
| } | ||
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| impl Plane { | ||
| pub fn width(&self) -> usize { | ||
| self.width | ||
| } | ||
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| pub fn height(&self) -> usize { | ||
| self.height | ||
| } | ||
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| pub fn bytes_per_row(&self) -> usize { | ||
| self.bytes_per_row | ||
| } | ||
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| pub fn data(&self) -> PixelBufferData { | ||
| unsafe { | ||
| CVPixelBufferLockBaseAddress(self.buffer, 0); | ||
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| let base_address = CVPixelBufferGetBaseAddressOfPlane(self.buffer, self.index); | ||
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| PixelBufferData { | ||
| buffer: self.buffer, | ||
| data: slice::from_raw_parts( | ||
| base_address as *mut _, | ||
| self.bytes_per_row * self.height, | ||
| ), | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| pub struct PixelBufferData<'a> { | ||
| buffer: CVPixelBufferRef, | ||
| data: &'a [u8], | ||
| } | ||
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| impl<'a> Deref for PixelBufferData<'a> { | ||
| type Target = [u8]; | ||
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| fn deref(&self) -> &'a Self::Target { | ||
| self.data | ||
| } | ||
| } | ||
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| impl<'a> Drop for PixelBufferData<'a> { | ||
| fn drop(&mut self) { | ||
| unsafe { CVPixelBufferUnlockBaseAddress(self.buffer, 0) }; | ||
| } | ||
| } | ||
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| impl RawCapturer<'_> { | ||
| #[cfg(target_os = "macos")] | ||
| pub fn get_next_pixel_buffer(&self) -> Result<PixelBuffer, mpsc::RecvError> { | ||
| loop { | ||
| if let Some(frame) = PixelBuffer::new(self.capturer.rx.recv()?) { | ||
| return Ok(frame); | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| pub unsafe fn sample_buffer_to_pixel_buffer(sample_buffer: &CMSampleBuffer) -> CVPixelBufferRef { | ||
| let buffer_ref = &(*sample_buffer.sys_ref); | ||
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| CMSampleBufferGetImageBuffer(buffer_ref) as CVPixelBufferRef | ||
| } | ||
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| pub unsafe fn pixel_buffer_bounds(pixel_buffer: CVPixelBufferRef) -> (usize, usize) { | ||
| let width = CVPixelBufferGetWidth(pixel_buffer); | ||
| let height = CVPixelBufferGetHeight(pixel_buffer); | ||
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| (width, height) | ||
| } | ||
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| pub unsafe fn pixel_buffer_bytes_per_row(pixel_buffer: CVPixelBufferRef) -> usize { | ||
| CVPixelBufferGetBytesPerRow(pixel_buffer) | ||
| } | ||
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| pub unsafe fn pixel_buffer_display_time(sample_buffer: &CMSampleBuffer) -> u64 { | ||
| sample_buffer.sys_ref.get_presentation_timestamp().value as u64 | ||
| } |
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