d6c3c65da49c7a66261112260f469560072d0bcd
2 * Copyright (c) 2013 Stefano Sabatini
4 * This file is part of FFmpeg.
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.
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.
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
23 * receive commands through libzeromq and broker them to filters
27 #include "libavutil/avstring.h"
28 #include "libavutil/bprint.h"
29 #include "libavutil/opt.h"
32 #include "avfiltergraph.h"
44 #define OFFSET(x) offsetof(ZMQContext, x)
45 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_VIDEO_PARAM
46 static const AVOption options
[] = {
47 { "bind_address", "set bind address", OFFSET(bind_address
), AV_OPT_TYPE_STRING
, {.str
= "tcp://*:5555"}, 0, 0, FLAGS
},
48 { "b", "set bind address", OFFSET(bind_address
), AV_OPT_TYPE_STRING
, {.str
= "tcp://*:5555"}, 0, 0, FLAGS
},
52 static av_cold
int init(AVFilterContext
*ctx
)
54 ZMQContext
*zmq
= ctx
->priv
;
56 zmq
->zmq
= zmq_ctx_new();
58 av_log(ctx
, AV_LOG_ERROR
,
59 "Could not create ZMQ context: %s\n", zmq_strerror(errno
));
60 return AVERROR_EXTERNAL
;
63 zmq
->responder
= zmq_socket(zmq
->zmq
, ZMQ_REP
);
64 if (!zmq
->responder
) {
65 av_log(ctx
, AV_LOG_ERROR
,
66 "Could not create ZMQ socket: %s\n", zmq_strerror(errno
));
67 return AVERROR_EXTERNAL
;
70 if (zmq_bind(zmq
->responder
, zmq
->bind_address
) == -1) {
71 av_log(ctx
, AV_LOG_ERROR
,
72 "Could not bind ZMQ socket to address '%s': %s\n",
73 zmq
->bind_address
, zmq_strerror(errno
));
74 return AVERROR_EXTERNAL
;
77 zmq
->command_count
= -1;
81 static void av_cold
uninit(AVFilterContext
*ctx
)
83 ZMQContext
*zmq
= ctx
->priv
;
85 zmq_close(zmq
->responder
);
86 zmq_ctx_destroy(zmq
->zmq
);
90 char *target
, *command
, *arg
;
93 #define SPACES " \f\t\n\r"
95 static int parse_command(Command
*cmd
, const char *command_str
, void *log_ctx
)
97 const char **buf
= &command_str
;
99 cmd
->target
= av_get_token(buf
, SPACES
);
100 if (!cmd
->target
|| !cmd
->target
[0]) {
101 av_log(log_ctx
, AV_LOG_ERROR
,
102 "No target specified in command '%s'\n", command_str
);
103 return AVERROR(EINVAL
);
106 cmd
->command
= av_get_token(buf
, SPACES
);
107 if (!cmd
->command
|| !cmd
->command
[0]) {
108 av_log(log_ctx
, AV_LOG_ERROR
,
109 "No command specified in command '%s'\n", command_str
);
110 return AVERROR(EINVAL
);
113 cmd
->arg
= av_get_token(buf
, SPACES
);
117 static int recv_msg(AVFilterContext
*ctx
, char **buf
, int *buf_size
)
119 ZMQContext
*zmq
= ctx
->priv
;
123 if (zmq_msg_init(&msg
) == -1) {
124 av_log(ctx
, AV_LOG_WARNING
,
125 "Could not initialize receive message: %s\n", zmq_strerror(errno
));
126 return AVERROR_EXTERNAL
;
129 if (zmq_msg_recv(&msg
, zmq
->responder
, ZMQ_DONTWAIT
) == -1) {
131 av_log(ctx
, AV_LOG_WARNING
,
132 "Could not receive message: %s\n", zmq_strerror(errno
));
133 ret
= AVERROR_EXTERNAL
;
137 *buf_size
= zmq_msg_size(&msg
) + 1;
138 *buf
= av_malloc(*buf_size
);
140 ret
= AVERROR(ENOMEM
);
143 memcpy(*buf
, zmq_msg_data(&msg
), *buf_size
);
144 (*buf
)[*buf_size
-1] = 0;
151 static int filter_frame(AVFilterLink
*inlink
, AVFrame
*ref
)
153 AVFilterContext
*ctx
= inlink
->dst
;
154 ZMQContext
*zmq
= ctx
->priv
;
158 char *recv_buf
, *send_buf
;
163 /* receive command */
164 if (recv_msg(ctx
, &recv_buf
, &recv_buf_size
) < 0)
166 zmq
->command_count
++;
169 if (parse_command(&cmd
, recv_buf
, ctx
) < 0) {
170 av_log(ctx
, AV_LOG_ERROR
, "Could not parse command #%d\n", zmq
->command_count
);
174 /* process command */
175 av_log(ctx
, AV_LOG_VERBOSE
,
176 "Processing command #%d target:%s command:%s arg:%s\n",
177 zmq
->command_count
, cmd
.target
, cmd
.command
, cmd
.arg
);
178 ret
= avfilter_graph_send_command(inlink
->graph
,
179 cmd
.target
, cmd
.command
, cmd
.arg
,
180 cmd_buf
, sizeof(cmd_buf
),
181 AVFILTER_CMD_FLAG_ONE
);
182 send_buf
= av_asprintf("%d %s%s%s",
183 -ret
, av_err2str(ret
), cmd_buf
[0] ? "\n" : "", cmd_buf
);
185 ret
= AVERROR(ENOMEM
);
188 av_log(ctx
, AV_LOG_VERBOSE
,
189 "Sending command reply for command #%d:\n%s\n",
190 zmq
->command_count
, send_buf
);
191 if (zmq_send(zmq
->responder
, send_buf
, strlen(send_buf
), 0) == -1)
192 av_log(ctx
, AV_LOG_ERROR
, "Failed to send reply for command #%d: %s\n",
193 zmq
->command_count
, zmq_strerror(ret
));
199 av_freep(&cmd
.target
);
200 av_freep(&cmd
.command
);
204 return ff_filter_frame(ctx
->outputs
[0], ref
);
207 #if CONFIG_ZMQ_FILTER
209 #define zmq_options options
210 AVFILTER_DEFINE_CLASS(zmq
);
212 static const AVFilterPad zmq_inputs
[] = {
215 .type
= AVMEDIA_TYPE_VIDEO
,
216 .filter_frame
= filter_frame
,
221 static const AVFilterPad zmq_outputs
[] = {
224 .type
= AVMEDIA_TYPE_VIDEO
,
229 AVFilter ff_vf_zmq
= {
231 .description
= NULL_IF_CONFIG_SMALL("Receive commands through ZMQ and broker them to filters."),
234 .priv_size
= sizeof(ZMQContext
),
235 .inputs
= zmq_inputs
,
236 .outputs
= zmq_outputs
,
237 .priv_class
= &zmq_class
,
242 #if CONFIG_AZMQ_FILTER
244 #define azmq_options options
245 AVFILTER_DEFINE_CLASS(azmq
);
247 static const AVFilterPad azmq_inputs
[] = {
250 .type
= AVMEDIA_TYPE_AUDIO
,
251 .filter_frame
= filter_frame
,
256 static const AVFilterPad azmq_outputs
[] = {
259 .type
= AVMEDIA_TYPE_AUDIO
,
264 AVFilter ff_af_azmq
= {
266 .description
= NULL_IF_CONFIG_SMALL("Receive commands through ZMQ and broker them to filters."),
269 .priv_size
= sizeof(ZMQContext
),
270 .inputs
= azmq_inputs
,
271 .outputs
= azmq_outputs
,
272 .priv_class
= &azmq_class
,