DSP Utilities

DSP Utilities. More...

Functions
GAVL_PUBLIC int	gavl_dsp_interpolate_video_frame (gavl_dsp_context_t *ctx, gavl_video_format_t *format, gavl_video_frame_t *src_1, gavl_video_frame_t *src_2, gavl_video_frame_t *dst, float factor)
	Do a linear interpolation of a video frame. More...
GAVL_PUBLIC int	gavl_dsp_audio_frame_swap_endian (gavl_dsp_context_t *ctx, gavl_audio_frame_t *frame, const gavl_audio_format_t *format)
	Swap endianess an audio frame. More...
GAVL_PUBLIC int	gavl_dsp_video_frame_swap_endian (gavl_dsp_context_t *ctx, gavl_video_frame_t *frame, const gavl_video_format_t *format)
	Swap endianess a video frame. More...

Detailed Description

DSP Utilities.

These are some utility functions, which use a DSP context but operate on higher level structures like video frames. As usual, these are supported for any format.

Function Documentation

GAVL_PUBLIC int gavl_dsp_interpolate_video_frame	(	gavl_dsp_context_t *	ctx,
		gavl_video_format_t *	format,
		gavl_video_frame_t *	src_1,
		gavl_video_frame_t *	src_2,
		gavl_video_frame_t *	dst,
		float	factor
	)

Do a linear interpolation of a video frame.

Parameters

ctx	A DSP context
format	Video format
src_1	Frame 1
src_2	Frame 2
dst	Destination frame
factor	Interpolation factor

Returns

1 on success, 0 if an error occurred

If factor is 1.0, dst will be equal to src1, if factor is 0.0, dst will be equal to src2.

If the quality is at least GAVL_QUALITY_MIN, this function never fails.

GAVL_PUBLIC int gavl_dsp_audio_frame_swap_endian	(	gavl_dsp_context_t *	ctx,
		gavl_audio_frame_t *	frame,
		const gavl_audio_format_t *	format
	)

Swap endianess an audio frame.

Parameters

ctx	An initialized dsp context
frame	An audio frame
format	The format of the frame

Returns

1 on success, 0 if an error occurred

If the quality is at least GAVL_QUALITY_MIN, this function never fails.

GAVL_PUBLIC int gavl_dsp_video_frame_swap_endian	(	gavl_dsp_context_t *	ctx,
		gavl_video_frame_t *	frame,
		const gavl_video_format_t *	format
	)

Swap endianess a video frame.

Parameters

ctx	An initialized dsp context
frame	A video frame
format	The format of the frame

Returns

1 on success, 0 if an error occurred

This function swaps endianess for pixelformats, which have multibyte numbers as components. For 32 bit long formats with 8 bit components, it swaps the pixels as if they were 32 bit integers. For all other formats, it does nothing.

If the quality is at least GAVL_QUALITY_MIN, this function never fails.