mirror of
https://github.com/AlexxIT/go2rtc.git
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63 lines
1.1 KiB
Go
63 lines
1.1 KiB
Go
package device
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const (
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V4L2_PIX_FMT_YUYV = 'Y' | 'U'<<8 | 'Y'<<16 | 'V'<<24
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V4L2_PIX_FMT_NV12 = 'N' | 'V'<<8 | '1'<<16 | '2'<<24
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V4L2_PIX_FMT_MJPEG = 'M' | 'J'<<8 | 'P'<<16 | 'G'<<24
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V4L2_PIX_FMT_H264 = 'H' | '2'<<8 | '6'<<16 | '4'<<24
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V4L2_PIX_FMT_HEVC = 'H' | 'E'<<8 | 'V'<<16 | 'C'<<24
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)
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type Format struct {
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FourCC uint32
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Name string
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FFmpeg string
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}
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var Formats = []Format{
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{V4L2_PIX_FMT_YUYV, "YUV 4:2:2", "yuyv422"},
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{V4L2_PIX_FMT_NV12, "Y/UV 4:2:0", "nv12"},
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{V4L2_PIX_FMT_MJPEG, "Motion-JPEG", "mjpeg"},
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{V4L2_PIX_FMT_H264, "H.264", "h264"},
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{V4L2_PIX_FMT_HEVC, "HEVC", "hevc"},
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}
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func YUYVtoYUV(dst, src []byte) {
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n := len(src)
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i0 := 0
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iy := 0
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iu := n / 2
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iv := n / 4 * 3
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for i0 < n {
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dst[iy] = src[i0]
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i0++
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iy++
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dst[iu] = src[i0]
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i0++
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iu++
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dst[iy] = src[i0]
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i0++
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iy++
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dst[iv] = src[i0]
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i0++
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iv++
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}
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}
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func NV12toYUV(dst, src []byte) {
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n := len(src)
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k := n / 6
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i0 := k * 4
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iu := i0
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iv := i0 + k
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copy(dst, src[:i0]) // copy Y
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for i0 < n {
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dst[iu] = src[i0]
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i0++
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iu++
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dst[iv] = src[i0]
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i0++
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iv++
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}
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}
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