Initialisation du repository de Beta

venv/lib/python3.12/site-packages/av/video/format.pyx

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+
+cdef object _cinit_bypass_sentinel = object()
+
+cdef VideoFormat get_video_format(lib.AVPixelFormat c_format, unsigned int width, unsigned int height):
+    if c_format == lib.AV_PIX_FMT_NONE:
+        return None
+
+    cdef VideoFormat format = VideoFormat.__new__(VideoFormat, _cinit_bypass_sentinel)
+    format._init(c_format, width, height)
+    return format
+
+cdef lib.AVPixelFormat get_pix_fmt(const char *name) except lib.AV_PIX_FMT_NONE:
+    """Wrapper for lib.av_get_pix_fmt with error checking."""
+
+    cdef lib.AVPixelFormat pix_fmt = lib.av_get_pix_fmt(name)
+
+    if pix_fmt == lib.AV_PIX_FMT_NONE:
+        raise ValueError("not a pixel format: %r" % name)
+
+    return pix_fmt
+
+
+cdef class VideoFormat:
+    """
+
+        >>> format = VideoFormat('rgb24')
+        >>> format.name
+        'rgb24'
+
+    """
+
+    def __cinit__(self, name, width=0, height=0):
+        if name is _cinit_bypass_sentinel:
+            return
+
+        cdef VideoFormat other
+        if isinstance(name, VideoFormat):
+            other = <VideoFormat>name
+            self._init(other.pix_fmt, width or other.width, height or other.height)
+            return
+
+        cdef lib.AVPixelFormat pix_fmt = get_pix_fmt(name)
+        self._init(pix_fmt, width, height)
+
+    cdef _init(self, lib.AVPixelFormat pix_fmt, unsigned int width, unsigned int height):
+        self.pix_fmt = pix_fmt
+        self.ptr = lib.av_pix_fmt_desc_get(pix_fmt)
+        self.width = width
+        self.height = height
+        self.components = tuple(
+            VideoFormatComponent(self, i)
+            for i in range(self.ptr.nb_components)
+        )
+
+    def __repr__(self):
+        if self.width or self.height:
+            return f"<av.{self.__class__.__name__} {self.name}, {self.width}x{self.height}>"
+        else:
+            return f"<av.{self.__class__.__name__} {self.name}>"
+
+    def __int__(self):
+        return int(self.pix_fmt)
+
+    @property
+    def name(self):
+        """Canonical name of the pixel format."""
+        return <str>self.ptr.name
+
+    @property
+    def bits_per_pixel(self):
+        return lib.av_get_bits_per_pixel(self.ptr)
+
+    @property
+    def padded_bits_per_pixel(self): return lib.av_get_padded_bits_per_pixel(self.ptr)
+
+    @property
+    def is_big_endian(self):
+        """Pixel format is big-endian."""
+        return bool(self.ptr.flags & lib.AV_PIX_FMT_FLAG_BE)
+
+
+    @property
+    def has_palette(self):
+        """Pixel format has a palette in data[1], values are indexes in this palette."""
+        return bool(self.ptr.flags & lib.AV_PIX_FMT_FLAG_PAL)
+
+
+    @property
+    def is_bit_stream(self):
+        """All values of a component are bit-wise packed end to end."""
+        return bool(self.ptr.flags & lib.AV_PIX_FMT_FLAG_BITSTREAM)
+
+
+    # Skipping PIX_FMT_HWACCEL
+    # """Pixel format is an HW accelerated format."""
+
+    @property
+    def is_planar(self):
+        """At least one pixel component is not in the first data plane."""
+        return bool(self.ptr.flags & lib.AV_PIX_FMT_FLAG_PLANAR)
+
+
+    @property
+    def is_rgb(self):
+        """The pixel format contains RGB-like data (as opposed to YUV/grayscale)."""
+        return bool(self.ptr.flags & lib.AV_PIX_FMT_FLAG_RGB)
+    
+
+    @property
+    def is_bayer(self):
+        """The pixel format contains Bayer data."""
+        return bool(self.ptr.flags & lib.AV_PIX_FMT_FLAG_BAYER)
+
+    cpdef chroma_width(self, int luma_width=0):
+        """chroma_width(luma_width=0)
+
+        Width of a chroma plane relative to a luma plane.
+
+        :param int luma_width: Width of the luma plane; defaults to ``self.width``.
+
+        """
+        luma_width = luma_width or self.width
+        return -((-luma_width) >> self.ptr.log2_chroma_w) if luma_width else 0
+
+    cpdef chroma_height(self, int luma_height=0):
+        """chroma_height(luma_height=0)
+
+        Height of a chroma plane relative to a luma plane.
+
+        :param int luma_height: Height of the luma plane; defaults to ``self.height``.
+
+        """
+        luma_height = luma_height or self.height
+        return -((-luma_height) >> self.ptr.log2_chroma_h) if luma_height else 0
+
+
+cdef class VideoFormatComponent:
+    def __cinit__(self, VideoFormat format, size_t index):
+        self.format = format
+        self.index = index
+        self.ptr = &format.ptr.comp[index]
+
+    @property
+    def plane(self):
+        """The index of the plane which contains this component."""
+        return self.ptr.plane
+
+    @property
+    def bits(self):
+        """Number of bits in the component."""
+        return self.ptr.depth
+
+    @property
+    def is_alpha(self):
+        """Is this component an alpha channel?"""
+        return ((self.index == 1 and self.format.ptr.nb_components == 2) or
+                (self.index == 3 and self.format.ptr.nb_components == 4))
+
+    @property
+    def is_luma(self):
+        """Is this component a luma channel?"""
+        return self.index == 0 and (
+            self.format.ptr.nb_components == 1 or
+            self.format.ptr.nb_components == 2 or
+            not self.format.is_rgb
+        )
+
+    @property
+    def is_chroma(self):
+        """Is this component a chroma channel?"""
+        return (self.index == 1 or self.index == 2) and (self.format.ptr.log2_chroma_w or self.format.ptr.log2_chroma_h)
+
+    @property
+    def width(self):
+        """The width of this component's plane.
+
+        Requires the parent :class:`VideoFormat` to have a width.
+
+        """
+        return self.format.chroma_width() if self.is_chroma else self.format.width
+
+    @property
+    def height(self):
+        """The height of this component's plane.
+
+        Requires the parent :class:`VideoFormat` to have a height.
+
+        """
+        return self.format.chroma_height() if self.is_chroma else self.format.height
+
+
+names = set()
+cdef const lib.AVPixFmtDescriptor *desc = NULL
+while True:
+    desc = lib.av_pix_fmt_desc_next(desc)
+    if not desc:
+        break
+    names.add(desc.name)