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/*
* Pure Data Packet system implementation. Image packet interface
* Copyright (c) by Tom Schouten <pdp@zzz.kotnet.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
/*
This file contains methods for the image packets
pdp_packet_new_* methods are several image packet constructors
It also contains some pdp_type_ methods, for type checking
and conversion.
*/
#ifndef PDP_IMAGE_H
#define PDP_IMAGE_H
/* image subheader */
typedef struct _image
{
/* standard images */
unsigned int encoding; /* image encoding (data format) */
unsigned int width; /* image width in pixels */
unsigned int height; /* image height in pixels */
unsigned int depth; /* number of colour planes if PDP_IMAGE_MCHP */
unsigned int chanmask; /* channel bitmask to mask out inactive channels (0 == not used) */
/* sliced image extensions */ /* THIS IS EXPERIMENTAL, DON'T DEPEND ON IT */
unsigned int slice_sync; /* slice synchro information */
unsigned int slice_yoff; /* y offset of the slice in original image */
unsigned int orig_height; /* height of original image (this is zero for ordinary images) */
} t_image;
/* image encodings */
#define PDP_IMAGE_YV12 1 /* 24bbp: 16 bit Y plane followed by 16 bit 2x2 subsampled V and U planes.*/
#define PDP_IMAGE_GREY 2 /* 16bbp: 16 bit Y plane */
#define PDP_IMAGE_MCHP 4 /* generic 16bit multi channel planar (16 bit 3D tensor) */
/* slice synchro information */
#define PDP_IMAGE_SLICE_FIRST (1<<0)
#define PDP_IMAGE_SLICE_LAST (1<<1)
#define PDP_IMAGE_SLICE_BODY (1<<2)
/* all symbols are C style */
#ifdef __cplusplus
extern "C"
{
#endif
/* validate and compat check */
bool pdp_packet_image_isvalid(int packet);
bool pdp_packet_image_compat(int packet0, int packet1);
/* short cuts to create specific packets */
int pdp_packet_new_image(u32 encoding, u32 width, u32 height);
int pdp_packet_new_image_YCrCb(u32 width, u32 height);
int pdp_packet_new_image_grey(u32 width, u32 height);
int pdp_packet_new_image_mchp(u32 width, u32 height, u32 depth);
#define pdp_packet_new_image_multi pdp_packet_new_image_mchp
/* get info */
t_pdp_symbol *pdp_packet_image_get_description(int packet);
t_image *pdp_packet_image_info(int packet);
/* set props */
void pdp_packet_image_set_chanmask(int packet, unsigned int chanmask);
#ifdef __cplusplus
}
#endif
#endif
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