From b694c274836ac8b04d644711ac324eac2e9ab83e Mon Sep 17 00:00:00 2001 From: Hans-Christoph Steiner Date: Fri, 16 Dec 2005 01:05:40 +0000 Subject: checking in pdp 0.12.4 from http://zwizwa.fartit.com/pd/pdp/pdp-0.12.4.tar.gz svn path=/trunk/externals/pdp/; revision=4232 --- modules/generic/pdp_rawin.c | 299 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 299 insertions(+) create mode 100644 modules/generic/pdp_rawin.c (limited to 'modules/generic/pdp_rawin.c') diff --git a/modules/generic/pdp_rawin.c b/modules/generic/pdp_rawin.c new file mode 100644 index 0000000..28ef8fb --- /dev/null +++ b/modules/generic/pdp_rawin.c @@ -0,0 +1,299 @@ +/* + * Pure Data Packet module. packet forth console + * Copyright (c) by Tom Schouten + * + * 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. + * + */ + + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "pdp_pd.h" +#include "pdp_debug.h" +#include "pdp_list.h" +#include "pdp_comm.h" +#include "pdp_post.h" +#include "pdp_packet.h" + + +#define PERIOD 1.0f +#define D if (1) + + + + +/* raw input from a unix pipe */ + +typedef struct rawin_struct +{ + /* pd */ + t_object x_obj; + t_outlet *x_outlet; + t_outlet *x_sync_outlet; + t_clock *x_clock; + + /* comm */ + t_pdp_list *x_queue; // packet queue + + /* thread */ + pthread_mutex_t x_mut; + pthread_attr_t x_attr; + pthread_t x_thread; + + /* sync */ + int x_giveup; // 1-> terminate reader thread + int x_active; // 1-> reader thread is launched + int x_done; // 1-> reader thread has exited + + /* config */ + t_symbol *x_pipe; + t_pdp_symbol *x_type; + +} t_rawin; + + +static inline void lock(t_rawin *x){pthread_mutex_lock(&x->x_mut);} +static inline void unlock(t_rawin *x){pthread_mutex_unlock(&x->x_mut);} + +static void rawin_close(t_rawin *x); +static void tick(t_rawin *x) +{ + /* send all packets in queue to outlet */ + lock(x); + while (x->x_queue->elements){ + outlet_pdp_atom(x->x_outlet, x->x_queue->first); + pdp_list_pop(x->x_queue); // pop stale reference + } + unlock(x); + clock_delay(x->x_clock, PERIOD); + + /* check if thread is done */ + if (x->x_done) rawin_close(x); + +} + +static void move_current_to_queue(t_rawin *x, int packet) +{ + lock(x); + pdp_list_add_back(x->x_queue, a_packet, (t_pdp_word)packet); + unlock(x); +} + +static void *rawin_thread(void *y) +{ + int pipe; + int packet = -1; + t_rawin *x = (t_rawin *)y; + int period_sec; + int period_usec; + + + //D pdp_post("pipe: %s", x->x_pipe->s_name); + //D pdp_post("type: %s", x->x_type->s_name); + + /* open pipe */ + if (-1 == (pipe = open(x->x_pipe->s_name, O_RDONLY|O_NONBLOCK))){ + perror(x->x_pipe->s_name); + goto exit; + } + + /* main loop (packets) */ + while(1){ + void *data = 0; + int left = -1; + + /* create packet */ + if (-1 != packet){ + pdp_post("WARNING: deleting stale packet"); + pdp_packet_mark_unused(packet); + } + packet = pdp_factory_newpacket(x->x_type); + if (-1 == packet){ + pdp_post("ERROR: can't create packet. type = %s", x->x_type->s_name); + goto exit; + } + + /* fill packet */ + data = pdp_packet_data(packet); + left = pdp_packet_data_size(packet); + // D pdp_post("packet %d, data %x, size %d", packet, data, left); + + /* inner loop: pipe reads */ + while(left){ + + fd_set inset; + struct timeval tv = {0,10000}; + + /* check if we need to stop */ + if (x->x_giveup){ + pdp_packet_mark_unused(packet); + goto close; + } + /* select, with timeout */ + FD_ZERO(&inset); + FD_SET(pipe, &inset); + if (-1 == select(pipe+1, &inset, NULL,NULL, &tv)){ + pdp_post("select error"); + goto close; + } + + /* if ready, read, else retry */ + if (FD_ISSET(pipe, &inset)){ + int bytes = read(pipe, data, left); + if (!bytes){ + /* if no bytes are read, pipe is closed */ + goto close; + } + data += bytes; + left -= bytes; + } + } + + /* move to queue */ + move_current_to_queue(x, packet); + packet = -1; + + + + } + + close: + /* close pipe */ + close(pipe); + + + exit: + x->x_done = 1; + return 0; +} + + + +static void rawin_type(t_rawin *x, t_symbol *type) +{ + x->x_type = pdp_gensym(type->s_name); +} + +static void rawin_open(t_rawin *x, t_symbol *pipe) +{ + /* save pipe name if not empty */ + if (pipe->s_name[0]) {x->x_pipe = pipe;} + + if (x->x_active) { + pdp_post("already open"); + return; + } + /* start thread */ + x->x_giveup = 0; + x->x_done = 0; + pthread_create(&x->x_thread, &x->x_attr, rawin_thread , x); + x->x_active = 1; +} + +static void rawin_close(t_rawin *x) +{ + + if (!x->x_active) return; + + /* stop thread: set giveup + wait */ + x->x_giveup = 1; + pthread_join(x->x_thread, NULL); + x->x_active = 0; + + /* notify */ + outlet_bang(x->x_sync_outlet); + pdp_post("connection to %s closed", x->x_pipe->s_name); + + + + + +} + +static void rawin_free(t_rawin *x) +{ + rawin_close(x); + clock_free(x->x_clock); + pdp_tree_strip_packets(x->x_queue); + pdp_tree_free(x->x_queue); +} + +t_class *rawin_class; + + +static void *rawin_new(t_symbol *pipe, t_symbol *type) +{ + t_rawin *x; + + pdp_post("%s %s", pipe->s_name, type->s_name); + + /* allocate & init */ + x = (t_rawin *)pd_new(rawin_class); + x->x_outlet = outlet_new(&x->x_obj, &s_anything); + x->x_sync_outlet = outlet_new(&x->x_obj, &s_anything); + x->x_clock = clock_new(x, (t_method)tick); + x->x_queue = pdp_list_new(0); + x->x_active = 0; + x->x_giveup = 0; + x->x_done = 0; + x->x_type = pdp_gensym("image/YCrCb/320x240"); //default + x->x_pipe = gensym("/tmp/pdpraw"); // default + pthread_attr_init(&x->x_attr); + pthread_mutex_init(&x->x_mut, NULL); + clock_delay(x->x_clock, PERIOD); + + /* args */ + rawin_type(x, type); + if (pipe->s_name[0]) x->x_pipe = pipe; + + return (void *)x; + +} + + + +#ifdef __cplusplus +extern "C" +{ +#endif + + +void pdp_rawin_setup(void) +{ + int i; + + /* create a standard pd class: [pdp_rawin pipe type] */ + rawin_class = class_new(gensym("pdp_rawin"), (t_newmethod)rawin_new, + (t_method)rawin_free, sizeof(t_rawin), 0, A_DEFSYMBOL, A_DEFSYMBOL, A_NULL); + + /* add global message handler */ + class_addmethod(rawin_class, (t_method)rawin_type, gensym("type"), A_SYMBOL, A_NULL); + class_addmethod(rawin_class, (t_method)rawin_open, gensym("open"), A_DEFSYMBOL, A_NULL); + class_addmethod(rawin_class, (t_method)rawin_close, gensym("close"), A_NULL); + + +} + +#ifdef __cplusplus +} +#endif -- cgit v1.2.1