buf2rgb.h File Reference

Some helper functions header file. More...

#include "drmbuffer.h"

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Functions
uint8_t *	BufToRgb (cDrmBuffer *buf, int *size, int w, int h, enum AVPixelFormat dst_pix_fmt)
	Convert a DRM buffer to rgb format image. More...
uint8_t *	ScaleRgb24 (uint8_t *src, int *size, int src_w, int src_h, int dst_w, int dst_h)
	Scale an image. More...
void	AlphaBlend (uint8_t *result, uint8_t *front, uint8_t *back, const unsigned int width, const unsigned int height)
	Blend two images. More...
int	BlitVideo (uint8_t *dst, uint8_t *src, int dst_w, int dst_h, int dst_x, int dst_y, int src_w, int src_h)
	Blit the video on black background. More...
void	PrintStreamData (const uint8_t *data, int size)
	Print raw stream data. More...

Detailed Description

Some helper functions header file.

Copyright

: (c) 2025 by Andreas Baierl. All Rights Reserved.

License

AGPLv3

This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details.

Definition in file buf2rgb.h.

Function Documentation

AlphaBlend()

void AlphaBlend	(	uint8_t *	result,
		uint8_t *	front,
		uint8_t *	back,
		const unsigned int	width,
		const unsigned int	height
	)

Blend two images.

Both, front and back image data have to be same size front is the OSD (ARGB) back is the video (RGB) result is RGB

Parameters

[out]	result	pointer to the resulting image data
[in]	front	pointer to the upper image data
[in]	back	pointer to the lower image data
[in]	width	image width
[in]	height	image height

Definition at line 203 of file buf2rgb.cpp.

References BLEND, OPAQUE, TRANSPARENT, and UNMULTIPLY.

Referenced by cSoftHdDevice::GrabImage().

BlitVideo()

int BlitVideo	(	uint8_t *	dst,
		uint8_t *	src,
		int	dstW,
		int	dstH,
		int	dstX,
		int	dstY,
		int	srcW,
		int	srcH
	)

Blit the video on black background.

Parameters

[in]	dst	pointer to the destination video
[in]	src	pointer to the source video
[in]	dstW	destination width of the image
[in]	dstH	destination height of the image
[in]	dstX	x offset of the (already scaled) video on the image
[in]	dstY	y offset of the (already scaled) video on the image
[in]	srcW	source video width
[in]	srcH	source video height

Returns

0 on success, -1 on error

Definition at line 264 of file buf2rgb.cpp.

References L_GRAB, and LOGDEBUG2.

Referenced by cSoftHdDevice::GrabImage().

BufToRgb()

uint8_t * BufToRgb	(	cDrmBuffer *	buf,
		int *	size,
		int	dstW,
		int	dstH,
		enum AVPixelFormat	dstPixFmt
	)

Convert a DRM buffer to rgb format image.

Conversion is done with ffmpegs swscale

Parameters

[in]	buf	pointer to the source drm buffer struct
[out]	size	size of the return data
[in]	dstW	width of the returned image
[in]	dstH	height of the returned image
[in]	dstPixFmt	pixel format of the returned image

Returns

a pointer to the image data

Definition at line 74 of file buf2rgb.cpp.

References DrmFormatToAVFormat(), cDrmBuffer::Height(), L_GRAB, LOGDEBUG2, LOGERROR, cDrmBuffer::NumPlanes(), cDrmBuffer::Offset(), cDrmBuffer::Pitch(), cDrmBuffer::Plane(), cDrmBuffer::Size(), and cDrmBuffer::Width().

Referenced by cVideoRender::ConvertOsdBufToRgb(), cVideoRender::ConvertPipBufToRgb(), and cVideoRender::ConvertVideoBufToRgb().

PrintStreamData()

void PrintStreamData	(	const uint8_t *	data,
		int	size
	)

Print raw stream data.

Parameters

data	pointer to stream data
size	data size

Definition at line 288 of file buf2rgb.cpp.

References LOGDEBUG.

ScaleRgb24()

uint8_t * ScaleRgb24	(	uint8_t *	src,
		int *	size,
		int	srcW,
		int	srcH,
		int	dstW,
		int	dstH
	)

Scale an image.

Conversion is done with ffmpegs swscale

Parameters

[in]	src	pointer to the source data
[out]	size	size of the return data
[in]	srcW	source width
[in]	srcH	source height
[in]	dstW	width of the returned image
[in]	dstH	height of the returned image

Returns

a pointer to the converted image data

Definition at line 152 of file buf2rgb.cpp.

References L_GRAB, LOGDEBUG2, and LOGERROR.

Referenced by cSoftHdDevice::GrabImage().