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Diffstat (limited to 'modules/pdp_grey2mask.c')
| -rw-r--r-- | modules/pdp_grey2mask.c | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/modules/pdp_grey2mask.c b/modules/pdp_grey2mask.c new file mode 100644 index 0000000..af6a99f --- /dev/null +++ b/modules/pdp_grey2mask.c @@ -0,0 +1,199 @@ +/* + * Pure Data Packet module. + * 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 module converts a greyscale image or the luma channel of a colour image + to a colour image intensity mask, usable for multiplication */ + +#include "pdp.h" +#include "pdp_resample.h" + +typedef struct pdp_grey2mask_struct +{ + t_object x_obj; + t_float x_f; + + t_outlet *x_outlet0; + + int x_packet0; + int x_dropped; + int x_queue_id; + + +} t_pdp_grey2mask; + + + +static void pdp_grey2mask_process_grey(t_pdp_grey2mask *x) +{ + t_pdp *header = pdp_packet_header(x->x_packet0); + short int *data = (short int *)pdp_packet_data (x->x_packet0); + t_pdp *newheader = 0; + short int *newdata = 0; + int newpacket = -1; + + unsigned int w = header->info.image.width; + unsigned int h = header->info.image.height; + + unsigned int size = w*h; + unsigned int totalnbpixels = size; + unsigned int u_offset = size; + unsigned int v_offset = size + (size>>2); + + unsigned int row, col; + + newpacket = pdp_packet_new(PDP_IMAGE, (size + (size>>1))<<1); + newheader = pdp_packet_header(newpacket); + newdata = (short int *)pdp_packet_data(newpacket); + + newheader->info.image.encoding = PDP_IMAGE_YV12; + newheader->info.image.width = w; + newheader->info.image.height = h; + + + /* copy luma channel */ + memcpy(newdata, data, size * sizeof(s16)); + + /* subsample luma -> chroma channel */ + pdp_resample_halve(data, newdata+u_offset, w, h); + + /* copy this to the other chroma channel */ + memcpy(newdata+v_offset, newdata+u_offset, (size>>2)*sizeof(s16)); + + /* delete source packet and replace with new packet */ + pdp_packet_mark_unused(x->x_packet0); + x->x_packet0 = newpacket; + return; +} + +static void pdp_grey2mask_process_yv12(t_pdp_grey2mask *x) +{ + /* process only the luminance channel */ + pdp_grey2mask_process_grey(x); +} + + + +static void pdp_grey2mask_process(t_pdp_grey2mask *x) +{ + int encoding; + t_pdp *header = 0; + + /* check if image data packets are compatible */ + if ( (header = pdp_packet_header(x->x_packet0)) + && (PDP_IMAGE == header->type)){ + + /* pdp_grey2mask_process inputs and write into active inlet */ + switch(pdp_packet_header(x->x_packet0)->info.image.encoding){ + + case PDP_IMAGE_YV12: + pdp_grey2mask_process_yv12(x); + break; + + case PDP_IMAGE_GREY: + pdp_grey2mask_process_grey(x); + break; + + default: + /* don't know the type, so dont pdp_grey2mask_process */ + + break; + } + } +} + +static void pdp_grey2mask_sendpacket(t_pdp_grey2mask *x) +{ + /* unregister and propagate if valid packet */ + pdp_pass_if_valid(x->x_outlet0, &x->x_packet0); +} + +static void pdp_grey2mask_input_0(t_pdp_grey2mask *x, t_symbol *s, t_floatarg f) +{ + + int p = (int)f; + + if (s== gensym("register_ro")) x->x_dropped = pdp_packet_copy_ro_or_drop(&x->x_packet0, p); + + + if ((s == gensym("process")) && (-1 != x->x_packet0) && (!x->x_dropped)){ + + + /* add the process method and callback to the process queue */ + + //pdp_queue_add(x, pdp_grey2mask_process, pdp_grey2mask_sendpacket, &x->x_queue_id); + // since the process method creates a packet, this is not processed in the thread + // $$$TODO: fix this + pdp_grey2mask_process(x); + pdp_grey2mask_sendpacket(x); + } + +} + + + +static void pdp_grey2mask_free(t_pdp_grey2mask *x) +{ + pdp_queue_finish(x->x_queue_id); + pdp_packet_mark_unused(x->x_packet0); + +} + +t_class *pdp_grey2mask_class; + + + +void *pdp_grey2mask_new(void) +{ + int i; + + t_pdp_grey2mask *x = (t_pdp_grey2mask *)pd_new(pdp_grey2mask_class); + + x->x_outlet0 = outlet_new(&x->x_obj, &s_anything); + x->x_packet0 = -1; + x->x_queue_id = -1; + + + return (void *)x; +} + + +#ifdef __cplusplus +extern "C" +{ +#endif + + +void pdp_grey2mask_setup(void) +{ + + + pdp_grey2mask_class = class_new(gensym("pdp_grey2mask"), (t_newmethod)pdp_grey2mask_new, + (t_method)pdp_grey2mask_free, sizeof(t_pdp_grey2mask), 0, A_NULL); + + + class_addmethod(pdp_grey2mask_class, (t_method)pdp_grey2mask_input_0, gensym("pdp"), A_SYMBOL, A_DEFFLOAT, A_NULL); + + +} + +#ifdef __cplusplus +} +#endif |