[FFmpeg-cvslog] tools: add zmqsend tool, useful to test the zmq filters
Stefano Sabatini
git at videolan.org
Tue May 14 20:12:31 CEST 2013
ffmpeg | branch: master | Stefano Sabatini <stefasab at gmail.com> | Fri May 3 18:05:18 2013 +0200| [2a1b7dee6d03367978d7a10d2f91c993e40a546e] | committer: Stefano Sabatini
tools: add zmqsend tool, useful to test the zmq filters
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=2a1b7dee6d03367978d7a10d2f91c993e40a546e
---
.gitignore | 1 +
doc/filters.texi | 26 ++++++++
libavfilter/Makefile | 2 +-
tools/zmqsend.c | 167 ++++++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 195 insertions(+), 1 deletion(-)
diff --git a/.gitignore b/.gitignore
index 979d617..dd93958 100644
--- a/.gitignore
+++ b/.gitignore
@@ -74,3 +74,4 @@
/tools/qt-faststart
/tools/trasher
/tools/seek_print
+/tools/zmqsend
diff --git a/doc/filters.texi b/doc/filters.texi
index f14cf6b..def2751 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -8413,6 +8413,32 @@ will send a reply to the client, adopting the format:
@var{MESSAGE} is optional.
+ at subsection Examples
+
+Look at @file{tools/zmqsend} for an example of a zmq client which can
+be used to send commands processed by these filters.
+
+Consider the following filtergraph generated by @command{ffplay}
+ at example
+ffplay -dumpgraph 1 -f lavfi "
+color=s=100x100:c=red [l];
+color=s=100x100:c=blue [r];
+nullsrc=s=200x100, zmq [bg];
+[bg][l] overlay [bg+l];
+[bg+l][r] overlay=x=100 "
+ at end example
+
+To change the color of the left side of the video, the following
+command can be used:
+ at example
+echo Parsed_color_0 c yellow | tools/zmqsend
+ at end example
+
+To change the right side:
+ at example
+echo Parsed_color_1 c pink | tools/zmqsend
+ at end example
+
@c man end MULTIMEDIA FILTERS
@chapter Multimedia Sources
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index f070dd0..0194186 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -238,7 +238,7 @@ OBJS-$(CONFIG_MOVIE_FILTER) += src_movie.o
SKIPHEADERS-$(CONFIG_LIBVIDSTAB) += vidstabutils.h
SKIPHEADERS-$(CONFIG_OPENCL) += opencl_internal.h deshake_opencl_kernel.h unsharp_opencl_kernel.h
-TOOLS = graph2dot
+TOOLS = graph2dot zmqsend
TESTPROGS = drawutils filtfmts formats
clean::
diff --git a/tools/zmqsend.c b/tools/zmqsend.c
new file mode 100644
index 0000000..ae3c8d7
--- /dev/null
+++ b/tools/zmqsend.c
@@ -0,0 +1,167 @@
+/*
+ * Copyright (c) 2013 Stefano Sabatini
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+
+#include <zmq.h>
+
+#include "libavutil/mem.h"
+#include "libavutil/bprint.h"
+
+#if HAVE_UNISTD_H
+#include <unistd.h> /* getopt */
+#endif
+
+#if !HAVE_GETOPT
+#include "compat/getopt.c"
+#endif
+
+/**
+ * @file
+ * zmq message sender example, meant to be used with the zmq filters
+ */
+
+static void usage(void)
+{
+ printf("send message to ZMQ recipient, to use with the zmq filters\n");
+ printf("usage: zmqsend [OPTIONS]\n");
+ printf("\n"
+ "Options:\n"
+ "-b ADDRESS set bind address\n"
+ "-h print this help\n"
+ "-i INFILE set INFILE as input file, stdin if omitted\n");
+}
+
+int main(int argc, char **argv)
+{
+ AVBPrint src;
+ char c, *src_buf, *recv_buf;
+ int recv_buf_size, ret;
+ void *ctx, *socket;
+ const char *bind_address = "tcp://localhost:5555";
+ const char *infilename = NULL;
+ FILE *infile = NULL;
+ zmq_msg_t msg;
+
+ while ((c = getopt(argc, argv, "b:hi:")) != -1) {
+ switch (c) {
+ case 'b':
+ bind_address = optarg;
+ break;
+ case 'h':
+ usage();
+ return 0;
+ case 'i':
+ infilename = optarg;
+ break;
+ case '?':
+ return 1;
+ }
+ }
+
+ if (!infilename || !strcmp(infilename, "-")) {
+ infilename = "stdin";
+ infile = stdin;
+ } else {
+ infile = fopen(infilename, "r");
+ }
+ if (!infile) {
+ av_log(NULL, AV_LOG_ERROR,
+ "Impossible to open input file '%s': %s\n", infilename, strerror(errno));
+ return 1;
+ }
+
+ ctx = zmq_ctx_new();
+ if (!ctx) {
+ av_log(NULL, AV_LOG_ERROR,
+ "Could not create ZMQ context: %s\n", zmq_strerror(errno));
+ return 1;
+ }
+
+ socket = zmq_socket(ctx, ZMQ_REQ);
+ if (!socket) {
+ av_log(ctx, AV_LOG_ERROR,
+ "Could not create ZMQ socket: %s\n", zmq_strerror(errno));
+ ret = 1;
+ goto end;
+ }
+
+ if (zmq_connect(socket, bind_address) == -1) {
+ av_log(ctx, AV_LOG_ERROR, "Could not bind ZMQ responder to address '%s': %s\n",
+ bind_address, zmq_strerror(errno));
+ ret = 1;
+ goto end;
+ }
+
+ /* grab the input and store it in src */
+ av_bprint_init(&src, 1, AV_BPRINT_SIZE_UNLIMITED);
+ while ((c = fgetc(infile)) != EOF)
+ av_bprint_chars(&src, c, 1);
+ av_bprint_chars(&src, 0, 1);
+
+ if (!av_bprint_is_complete(&src)) {
+ av_log(NULL, AV_LOG_ERROR, "Could not allocate a buffer for the source string\n");
+ av_bprint_finalize(&src, NULL);
+ ret = 1;
+ goto end;
+ }
+ av_bprint_finalize(&src, &src_buf);
+
+ if (zmq_send(socket, src_buf, strlen(src_buf), 0) == -1) {
+ av_log(NULL, AV_LOG_ERROR, "Could not send message: %s\n", zmq_strerror(errno));
+ ret = 1;
+ goto end;
+ }
+
+ if (zmq_msg_init(&msg) == -1) {
+ av_log(ctx, AV_LOG_ERROR,
+ "Could not initialize receiving message: %s\n", zmq_strerror(errno));
+ ret = 1;
+ goto end;
+ }
+
+ if (zmq_msg_recv(&msg, socket, 0) == -1) {
+ av_log(ctx, AV_LOG_ERROR,
+ "Could not receive message: %s\n", zmq_strerror(errno));
+ zmq_msg_close(&msg);
+ ret = 1;
+ goto end;
+ }
+
+ recv_buf_size = zmq_msg_size(&msg) + 1;
+ recv_buf = av_malloc(recv_buf_size);
+ if (!recv_buf) {
+ av_log(ctx, AV_LOG_ERROR,
+ "Could not allocate receiving message buffer\n");
+ zmq_msg_close(&msg);
+ ret = 1;
+ goto end;
+ }
+ memcpy(recv_buf, zmq_msg_data(&msg), recv_buf_size);
+ recv_buf[recv_buf_size-1] = 0;
+ printf("%s\n", recv_buf);
+ zmq_msg_close(&msg);
+ av_free(recv_buf);
+
+end:
+ zmq_close(socket);
+ zmq_ctx_destroy(ctx);
+ return ret;
+}
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