core-video 0.5.2

Safe bindings to CoreVideo framework
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132

use std::ptr::{null, null_mut};

use core_foundation::{
    base::{kCFAllocatorDefault, CFAllocatorRef, CFType, CFTypeID, TCFType},
    dictionary::{CFDictionary, CFDictionaryRef},
    impl_CFTypeDescription, impl_TCFType,
    string::{CFString, CFStringRef},
};
use libc::c_void;

use crate::{
    opengl_buffer::{CVOpenGLBuffer, CVOpenGLBufferRef},
    r#return::{kCVReturnSuccess, CVReturn},
};

#[repr(C)]
pub struct __CVOpenGLBufferPool(c_void);

pub type CVOpenGLBufferPoolRef = *mut __CVOpenGLBufferPool;

extern "C" {
    pub static kCVOpenGLBufferPoolMinimumBufferCountKey: CFStringRef;
    pub static kCVOpenGLBufferPoolMaximumBufferAgeKey: CFStringRef;

    pub fn CVOpenGLBufferPoolGetTypeID() -> CFTypeID;
    pub fn CVOpenGLBufferPoolRetain(openGLBufferPool: CVOpenGLBufferPoolRef) -> CVOpenGLBufferPoolRef;
    pub fn CVOpenGLBufferPoolRelease(openGLBufferPool: CVOpenGLBufferPoolRef);
    pub fn CVOpenGLBufferPoolCreate(
        allocator: CFAllocatorRef,
        poolAttributes: CFDictionaryRef,
        openGLBufferAttributes: CFDictionaryRef,
        poolOut: *mut CVOpenGLBufferPoolRef,
    ) -> CVReturn;
    pub fn CVOpenGLBufferPoolGetAttributes(pool: CVOpenGLBufferPoolRef) -> CFDictionaryRef;
    pub fn CVOpenGLBufferPoolGetOpenGLBufferAttributes(pool: CVOpenGLBufferPoolRef) -> CFDictionaryRef;
    pub fn CVOpenGLBufferPoolCreateOpenGLBuffer(
        allocator: CFAllocatorRef,
        openGLBufferPool: CVOpenGLBufferPoolRef,
        openGLBufferOut: *mut CVOpenGLBufferRef,
    ) -> CVReturn;
}

pub enum CVOpenGLBufferPoolKeys {
    MinimumBufferCount,
    MaximumBufferAge,
}

impl From<CVOpenGLBufferPoolKeys> for CFStringRef {
    fn from(key: CVOpenGLBufferPoolKeys) -> Self {
        unsafe {
            match key {
                CVOpenGLBufferPoolKeys::MinimumBufferCount => kCVOpenGLBufferPoolMinimumBufferCountKey,
                CVOpenGLBufferPoolKeys::MaximumBufferAge => kCVOpenGLBufferPoolMaximumBufferAgeKey,
            }
        }
    }
}

impl From<CVOpenGLBufferPoolKeys> for CFString {
    fn from(key: CVOpenGLBufferPoolKeys) -> Self {
        unsafe { CFString::wrap_under_get_rule(CFStringRef::from(key)) }
    }
}

pub struct CVOpenGLBufferPool(CVOpenGLBufferPoolRef);

impl Drop for CVOpenGLBufferPool {
    fn drop(&mut self) {
        unsafe { CVOpenGLBufferPoolRelease(self.0) }
    }
}

impl_TCFType!(CVOpenGLBufferPool, CVOpenGLBufferPoolRef, CVOpenGLBufferPoolGetTypeID);
impl_CFTypeDescription!(CVOpenGLBufferPool);

impl CVOpenGLBufferPool {
    #[inline]
    pub fn new(
        pool_attributes: Option<&CFDictionary<CFString, CFType>>,
        opengl_buffer_attributes: Option<&CFDictionary<CFString, CFType>>,
    ) -> Result<CVOpenGLBufferPool, CVReturn> {
        let mut pool: CVOpenGLBufferPoolRef = null_mut();
        let status = unsafe {
            CVOpenGLBufferPoolCreate(
                kCFAllocatorDefault,
                pool_attributes.map_or(null(), |attrs| attrs.as_concrete_TypeRef()),
                opengl_buffer_attributes.map_or(null(), |attrs| attrs.as_concrete_TypeRef()),
                &mut pool,
            )
        };
        if status == kCVReturnSuccess {
            Ok(unsafe { TCFType::wrap_under_create_rule(pool) })
        } else {
            Err(status)
        }
    }

    #[inline]
    pub fn get_attributes(&self) -> Option<CFDictionary<CFString, CFType>> {
        unsafe {
            let attributes = CVOpenGLBufferPoolGetAttributes(self.as_concrete_TypeRef());
            if attributes.is_null() {
                None
            } else {
                Some(TCFType::wrap_under_create_rule(attributes))
            }
        }
    }

    #[inline]
    pub fn get_opengl_buffer_attributes(&self) -> Option<CFDictionary<CFString, CFType>> {
        unsafe {
            let attributes = CVOpenGLBufferPoolGetOpenGLBufferAttributes(self.as_concrete_TypeRef());
            if attributes.is_null() {
                None
            } else {
                Some(TCFType::wrap_under_create_rule(attributes))
            }
        }
    }

    #[inline]
    pub fn create_open_gl_buffer(&self) -> Result<CVOpenGLBuffer, CVReturn> {
        let mut buffer: CVOpenGLBufferRef = null_mut();
        let status = unsafe { CVOpenGLBufferPoolCreateOpenGLBuffer(kCFAllocatorDefault, self.as_concrete_TypeRef(), &mut buffer) };
        if status == kCVReturnSuccess {
            Ok(unsafe { TCFType::wrap_under_create_rule(buffer) })
        } else {
            Err(status)
        }
    }
}