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zmqsend.c
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1 /*
2  * Copyright (c) 2013 Stefano Sabatini
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include "config.h"
22 
23 #include <zmq.h>
24 
25 #include "libavutil/mem.h"
26 #include "libavutil/bprint.h"
27 
28 #if HAVE_UNISTD_H
29 #include <unistd.h> /* getopt */
30 #endif
31 
32 #if !HAVE_GETOPT
33 #include "compat/getopt.c"
34 #endif
35 
36 /**
37  * @file
38  * zmq message sender example, meant to be used with the zmq filters
39  */
40 
41 static void usage(void)
42 {
43  printf("send message to ZMQ recipient, to use with the zmq filters\n");
44  printf("usage: zmqsend [OPTIONS]\n");
45  printf("\n"
46  "Options:\n"
47  "-b ADDRESS set bind address\n"
48  "-h print this help\n"
49  "-i INFILE set INFILE as input file, stdin if omitted\n");
50 }
51 
52 int main(int argc, char **argv)
53 {
54  AVBPrint src;
55  char *src_buf, *recv_buf;
56  int c;
57  int recv_buf_size, ret = 0;
58  void *zmq_ctx, *socket;
59  const char *bind_address = "tcp://localhost:5555";
60  const char *infilename = NULL;
61  FILE *infile = NULL;
62  zmq_msg_t msg;
63 
64  while ((c = getopt(argc, argv, "b:hi:")) != -1) {
65  switch (c) {
66  case 'b':
67  bind_address = optarg;
68  break;
69  case 'h':
70  usage();
71  return 0;
72  case 'i':
73  infilename = optarg;
74  break;
75  case '?':
76  return 1;
77  }
78  }
79 
80  if (!infilename || !strcmp(infilename, "-")) {
81  infilename = "stdin";
82  infile = stdin;
83  } else {
84  infile = fopen(infilename, "r");
85  }
86  if (!infile) {
88  "Impossible to open input file '%s': %s\n", infilename, strerror(errno));
89  return 1;
90  }
91 
92  zmq_ctx = zmq_ctx_new();
93  if (!zmq_ctx) {
95  "Could not create ZMQ context: %s\n", zmq_strerror(errno));
96  return 1;
97  }
98 
99  socket = zmq_socket(zmq_ctx, ZMQ_REQ);
100  if (!socket) {
102  "Could not create ZMQ socket: %s\n", zmq_strerror(errno));
103  ret = 1;
104  goto end;
105  }
106 
107  if (zmq_connect(socket, bind_address) == -1) {
108  av_log(NULL, AV_LOG_ERROR, "Could not bind ZMQ responder to address '%s': %s\n",
109  bind_address, zmq_strerror(errno));
110  ret = 1;
111  goto end;
112  }
113 
114  /* grab the input and store it in src */
116  while ((c = fgetc(infile)) != EOF)
117  av_bprint_chars(&src, c, 1);
118  av_bprint_chars(&src, 0, 1);
119 
120  if (!av_bprint_is_complete(&src)) {
121  av_log(NULL, AV_LOG_ERROR, "Could not allocate a buffer for the source string\n");
122  av_bprint_finalize(&src, NULL);
123  ret = 1;
124  goto end;
125  }
126  av_bprint_finalize(&src, &src_buf);
127 
128  if (zmq_send(socket, src_buf, strlen(src_buf), 0) == -1) {
129  av_log(NULL, AV_LOG_ERROR, "Could not send message: %s\n", zmq_strerror(errno));
130  ret = 1;
131  goto end;
132  }
133 
134  if (zmq_msg_init(&msg) == -1) {
136  "Could not initialize receiving message: %s\n", zmq_strerror(errno));
137  ret = 1;
138  goto end;
139  }
140 
141  if (zmq_msg_recv(&msg, socket, 0) == -1) {
143  "Could not receive message: %s\n", zmq_strerror(errno));
144  zmq_msg_close(&msg);
145  ret = 1;
146  goto end;
147  }
148 
149  recv_buf_size = zmq_msg_size(&msg) + 1;
150  recv_buf = av_malloc(recv_buf_size);
151  if (!recv_buf) {
153  "Could not allocate receiving message buffer\n");
154  zmq_msg_close(&msg);
155  ret = 1;
156  goto end;
157  }
158  memcpy(recv_buf, zmq_msg_data(&msg), recv_buf_size);
159  recv_buf[recv_buf_size-1] = 0;
160  printf("%s\n", recv_buf);
161  zmq_msg_close(&msg);
162  av_free(recv_buf);
163 
164 end:
165  zmq_close(socket);
166  zmq_ctx_destroy(zmq_ctx);
167  return ret;
168 }
#define NULL
Definition: coverity.c:32
Memory handling functions.
#define src
Definition: vp8dsp.c:254
int av_bprint_finalize(AVBPrint *buf, char **ret_str)
Finalize a print buffer.
Definition: bprint.c:235
#define av_malloc(s)
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
#define av_log(a,...)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define AV_BPRINT_SIZE_UNLIMITED
void av_bprint_init(AVBPrint *buf, unsigned size_init, unsigned size_max)
Definition: bprint.c:69
static int av_bprint_is_complete(const AVBPrint *buf)
Test if the print buffer is complete (not truncated).
Definition: bprint.h:185
static int getopt(int argc, char *argv[], char *opts)
Definition: getopt.c:41
static double c[64]
static char * optarg
Definition: getopt.c:39
#define av_free(p)
int main(int argc, char **argv)
Definition: zmqsend.c:52
static void usage(void)
Definition: zmqsend.c:41
void av_bprint_chars(AVBPrint *buf, char c, unsigned n)
Append char c n times to a print buffer.
Definition: bprint.c:140