aboutsummaryrefslogtreecommitdiff
path: root/modules/generic/pdp_rawout.c
diff options
context:
space:
mode:
Diffstat (limited to 'modules/generic/pdp_rawout.c')
-rw-r--r--modules/generic/pdp_rawout.c320
1 files changed, 320 insertions, 0 deletions
diff --git a/modules/generic/pdp_rawout.c b/modules/generic/pdp_rawout.c
new file mode 100644
index 0000000..e1e9edf
--- /dev/null
+++ b/modules/generic/pdp_rawout.c
@@ -0,0 +1,320 @@
+/*
+ * Pure Data Packet module. packet forth console
+ * 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.
+ *
+ */
+
+
+#include <pthread.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <time.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <signal.h>
+#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 D if (1)
+#define MAX_QUEUESIZE 4
+#define PIPE_BLOCKSIZE 4096
+
+
+
+
+/* raw input from a unix pipe */
+
+typedef struct rawout_struct
+{
+ /* pd */
+ t_object x_obj;
+ //t_outlet *x_outlet;
+ t_outlet *x_sync_outlet;
+
+ /* 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 writer thread
+ int x_active; // 1-> writer thread is launched
+ int x_done; // 1-> writer thread has exited
+
+ /* config */
+ t_symbol *x_pipe;
+ t_pdp_symbol *x_type;
+
+} t_rawout;
+
+
+static inline void lock(t_rawout *x){pthread_mutex_lock(&x->x_mut);}
+static inline void unlock(t_rawout *x){pthread_mutex_unlock(&x->x_mut);}
+
+static void rawout_close(t_rawout *x);
+static void pdp_in(t_rawout *x, t_symbol *s, t_float f)
+{
+ /* save packet to pdp queue, if size is smaller than maxsize */
+ if (s == S_REGISTER_RO){
+ if (x->x_queue->elements < MAX_QUEUESIZE){
+ int p = (int)f;
+ p = pdp_packet_copy_ro(p);
+ if (p != -1){
+ lock(x);
+ pdp_list_add_back(x->x_queue, a_packet, (t_pdp_word)p);
+ unlock(x);
+ }
+ }
+ else {
+ pdp_post("pdp_rawout: dropping packet: (queue full)", MAX_QUEUESIZE);
+ }
+
+ }
+
+ /* check if thread is done */
+ if (x->x_done) rawout_close(x);
+
+}
+
+
+
+static void *rawout_thread(void *y)
+{
+ int pipe;
+ int packet = -1;
+ t_rawout *x = (t_rawout *)y;
+ int period_sec;
+ int period_usec;
+ sigset_t sigvec; /* signal handling */
+
+ /* ignore pipe signal */
+ sigemptyset(&sigvec);
+ sigaddset(&sigvec,SIGPIPE);
+ pthread_sigmask(SIG_BLOCK, &sigvec, 0);
+
+ //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_WRONLY|O_NONBLOCK))){
+ perror(x->x_pipe->s_name);
+ goto exit;
+ }
+
+ /* main loop (packets) */
+ while(1){
+ void *data = 0;
+ int left = -1;
+
+ /* try again if queue is empty */
+ if (!x->x_queue->elements){
+ /* check if we need to stop */
+ if (x->x_giveup){
+ goto close;
+ }
+ else {
+ usleep(1000.0f); // sleep before polling again
+ continue;
+ }
+ }
+ /* get packet from queue */
+ lock(x);
+ packet = pdp_list_pop(x->x_queue).w_packet;
+ unlock(x);
+
+ /* send packet */
+ data = pdp_packet_data(packet);
+ left = pdp_packet_data_size(packet);
+
+ /* inner loop: pipe reads */
+ while(left){
+
+ fd_set outset;
+ 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(&outset);
+ FD_SET(pipe, &outset);
+ if (-1 == select(pipe+1, NULL, &outset, NULL, &tv)){
+ pdp_post("select error");
+ goto close;
+ }
+
+ /* if ready, read, else retry */
+ if (FD_ISSET(pipe, &outset)){
+ int bytes = write(pipe, data, left);
+ /* handle errors */
+ if (bytes <= 0){
+ perror(x->x_pipe->s_name);
+ if (bytes != EAGAIN) goto close;
+ }
+ /* or update pointers */
+ else{
+ data += bytes;
+ left -= bytes;
+ //pdp_post("left %d", left);
+ }
+ }
+ else {
+ //pdp_post("retrying write");
+ }
+ }
+
+ /* discard packet */
+ pdp_packet_mark_unused(packet);
+
+
+ }
+
+ close:
+ /* close pipe */
+ close(pipe);
+
+
+ exit:
+ x->x_done = 1;
+ return 0;
+}
+
+
+
+static void rawout_type(t_rawout *x, t_symbol *type)
+{
+ x->x_type = pdp_gensym(type->s_name);
+}
+
+static void rawout_open(t_rawout *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, rawout_thread , x);
+ x->x_active = 1;
+}
+
+static void rawout_close(t_rawout *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 rawout_free(t_rawout *x)
+{
+ rawout_close(x);
+ pdp_tree_strip_packets(x->x_queue);
+ pdp_tree_free(x->x_queue);
+}
+
+t_class *rawout_class;
+
+
+static void *rawout_new(t_symbol *pipe, t_symbol *type)
+{
+ t_rawout *x;
+
+ pdp_post("%s %s", pipe->s_name, type->s_name);
+
+ /* allocate & init */
+ x = (t_rawout *)pd_new(rawout_class);
+ //x->x_outlet = outlet_new(&x->x_obj, &s_anything);
+ x->x_sync_outlet = outlet_new(&x->x_obj, &s_anything);
+ 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);
+
+ /* args */
+ rawout_type(x, type);
+ if (pipe->s_name[0]) x->x_pipe = pipe;
+
+ return (void *)x;
+
+}
+
+
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+
+void pdp_rawout_setup(void)
+{
+ int i;
+
+ /* create a standard pd class: [pdp_rawout pipe type] */
+ rawout_class = class_new(gensym("pdp_rawout"), (t_newmethod)rawout_new,
+ (t_method)rawout_free, sizeof(t_rawout), 0, A_DEFSYMBOL, A_DEFSYMBOL, A_NULL);
+
+ /* add global message handler */
+ class_addmethod(rawout_class, (t_method)pdp_in,
+ gensym("pdp"), A_SYMBOL, A_FLOAT, A_NULL);
+
+ class_addmethod(rawout_class, (t_method)rawout_type, gensym("type"), A_SYMBOL, A_NULL);
+ class_addmethod(rawout_class, (t_method)rawout_open, gensym("open"), A_DEFSYMBOL, A_NULL);
+ class_addmethod(rawout_class, (t_method)rawout_close, gensym("close"), A_NULL);
+
+
+}
+
+#ifdef __cplusplus
+}
+#endif
generated by cgit v1.2.1 (git 2.18.0) at 2024-11-04 07:47:26 +0000