From: Andriy Gelman <andriy.gel...@gmail.com>
Supports connecting to a RabbitMQ broker via AMQP version 0-9-1.
Signed-off-by: Andriy Gelman <andriy.gel...@gmail.com>
---
Changes in v2:
- Addressed comments from Marton
- Updated documentation
Compilation notes:
- Requires librabbitmq-dev package (on ubuntu).
- The pkg-config libprabbitmq.pc has a corrupt entry.
**update: fixed on the github master branch**
The line "Libs.private: rt; -lpthread" should be changed to
"Libs.private: -lrt -pthread".
- Compile FFmpeg with --enable-librabbitmq
To run an example:
#
# Start the RabbitMQ broker (I use docker)
# The following starts the broker on localhost:5672. A webui is available on
# localhost:15672 (User/password is "guest" by default)
#
$ docker run -it --rm --name rabbitmq -p 127.0.0.1:5672:5672 -p
127.0.0.1:15672:15672 rabbitmq:3-management
#
# Stream to the RabbitMQ broker:
#
$ ./ffmpeg -re -f lavfi -i yuvtestsrc -codec:v libx264 -f mpegts
-routing_key "amqp" -exchange "amq.direct" amqp://localhost
#
# Connect any number of clients to fetch data from the broker:
# The clients are filtered by the routing_key and exchange.
#
$ ./ffplay -routing_key "amqp" -exchange "amq.direct" amqp://localhost
Changelog | 1 +
configure | 5 +
doc/general.texi | 1 +
doc/protocols.texi | 60 +++++++++
libavformat/Makefile | 1 +
libavformat/libamqp.c | 286 ++++++++++++++++++++++++++++++++++++++++
libavformat/protocols.c | 1 +
libavformat/version.h | 4 +-
8 files changed, 357 insertions(+), 2 deletions(-)
create mode 100644 libavformat/libamqp.c
diff --git a/Changelog b/Changelog
index cb310a3abc2..ab30d670a15 100644
--- a/Changelog
+++ b/Changelog
@@ -43,6 +43,7 @@ version <next>:
- Rayman 2 ADPCM decoder
- Rayman 2 APM demuxer
- cas video filter
+- AMQP 0-9-1 protocol (RabbitMQ)
version 4.2:
diff --git a/configure b/configure
index 06e3a7b2a88..8b171349440 100755
--- a/configure
+++ b/configure
@@ -255,6 +255,7 @@ External library support:
--enable-libopenmpt enable decoding tracked files via libopenmpt
[no]
--enable-libopus enable Opus de/encoding via libopus [no]
--enable-libpulse enable Pulseaudio input via libpulse [no]
+ --enable-librabbitmq enable RabbitMQ library [no]
--enable-librav1e enable AV1 encoding via rav1e [no]
--enable-librsvg enable SVG rasterization via librsvg [no]
--enable-librubberband enable rubberband needed for rubberband filter
[no]
@@ -1789,6 +1790,7 @@ EXTERNAL_LIBRARY_LIST="
libopenmpt
libopus
libpulse
+ librabbitmq
librav1e
librsvg
librtmp
@@ -3434,6 +3436,8 @@ unix_protocol_deps="sys_un_h"
unix_protocol_select="network"
# external library protocols
+libamqp_protocol_deps="librabbitmq"
+libamqp_protocol_select="network"
librtmp_protocol_deps="librtmp"
librtmpe_protocol_deps="librtmp"
librtmps_protocol_deps="librtmp"
@@ -6317,6 +6321,7 @@ enabled libopus && {
}
}
enabled libpulse && require_pkg_config libpulse libpulse
pulse/pulseaudio.h pa_context_new
+enabled librabbitmq && require_pkg_config librabbitmq "librabbitmq >=
0.7.1" amqp.h amqp_new_connection
enabled librav1e && require_pkg_config librav1e "rav1e >= 0.1.0"
rav1e.h rav1e_context_new
enabled librsvg && require_pkg_config librsvg librsvg-2.0
librsvg-2.0/librsvg/rsvg.h rsvg_handle_render_cairo
enabled librtmp && require_pkg_config librtmp librtmp
librtmp/rtmp.h RTMP_Socket
diff --git a/doc/general.texi b/doc/general.texi
index dbdc3485982..623566dabea 100644
--- a/doc/general.texi
+++ b/doc/general.texi
@@ -1330,6 +1330,7 @@ performance on systems without hardware floating point
support).
@multitable @columnfractions .4 .1
@item Name @tab Support
+@item AMQP @tab X
@item file @tab X
@item FTP @tab X
@item Gopher @tab X
diff --git a/doc/protocols.texi b/doc/protocols.texi
index 54a287f488b..dc5f49ba8cc 100644
--- a/doc/protocols.texi
+++ b/doc/protocols.texi
@@ -51,6 +51,66 @@ in microseconds.
A description of the currently available protocols follows.
+@section amqp
+
+Advanced Message Queueing Protocol (AMQP) version 0-9-1 is a broker based
+publish-subscribe communication protocol.
+
+FFmpeg must be compiled with --enable-librabbitmq to support AMQP. A
separate
+AMQP broker must also be run. An example open-source AMQP broker is
RabbitMQ.
+
+After starting the broker, an FFmpeg client may stream data to the broker
using
+the command:
+
+@example
+ffmpeg -re -i input -f mpegts amqp://[[user]:[password]@@]hostname[:port]
+@end example
+
+Where hostname and port (default is 5672) is the address of the broker. The
+client may also set a user/password for authentication. The default for
both
+fields is "guest".
+
+Muliple subscribers may stream from the broker using the command:
+@example
+ffplay amqp://[[user]:[password]@@]hostname[:port]
+@end example
+
+In RabbitMQ all data published to the broker flows through a specific
exchange,
+and each subscribing client has an assigned queue/buffer. When a packet
arrives
+at an exchange, it may be copied to a client's queue depending on the
exchange
+and routing_key fields.
+
+The following options are supported:
+
+@table @option
+
+@item exchange
+Sets the exchange to use on the broker. RabbitMQ has several predefined
+exchanges: "amq.direct" is the default exchange, where the publisher and
+subscriber must have a matching routing_key; "amq.fanout" is the same as a
+broadcast operation (i.e. the data is forwarded to all queues on the fanout
+exchange independent of the routing_key); and "amq.topic" is similar to
+"amq.direct", but allows for more complex pattern matching (refer to the
RabbitMQ
+documentation).
+
+@item routing_key
+Sets the routing key. The default value is "amqp". The routing key is used
on
+the "amq.direct" and "amq.topic" exchanges to decide whether packets are
written
+to the queue of a subscriber.
+
+@item pkt_size
+Maximum size of each packet sent/received to the broker. Default is 131072.
+Minimum is 4096 and max is any large value (representable by an int). When
+receiving packets, this sets an internal buffer size in FFmpeg. It should
be
+equal to or greater than the size of the published packets to the broker.
Otherwise
+the received message may be truncated causing decoding errors.
+
+@item connection_timeout
+The timeout in microseconds during the initial connection to the broker.
The
+default value is rw_timeout, or 5000000 microseconds if rw_timeout is not
set.
+
+@end table
+
@section async
Asynchronous data filling wrapper for input stream.
diff --git a/libavformat/Makefile b/libavformat/Makefile
index e0681058a29..52b44289fee 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -629,6 +629,7 @@ OBJS-$(CONFIG_UDPLITE_PROTOCOL) += udp.o ip.o
OBJS-$(CONFIG_UNIX_PROTOCOL) += unix.o
# external library protocols
+OBJS-$(CONFIG_LIBAMQP_PROTOCOL) += libamqp.o
OBJS-$(CONFIG_LIBRTMP_PROTOCOL) += librtmp.o
OBJS-$(CONFIG_LIBRTMPE_PROTOCOL) += librtmp.o
OBJS-$(CONFIG_LIBRTMPS_PROTOCOL) += librtmp.o
diff --git a/libavformat/libamqp.c b/libavformat/libamqp.c
new file mode 100644
index 00000000000..baa42306bb0
--- /dev/null
+++ b/libavformat/libamqp.c
@@ -0,0 +1,286 @@
+/*
+ * Advanced Message Queuing Protocol (AMQP) 0-9-1
+ * Copyright (c) 2020 Andriy Gelman
+ *
+ * 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 <amqp.h>
+#include <amqp_tcp_socket.h>
+#include <sys/time.h>
+#include "avformat.h"
+#include "libavformat/urldecode.h"
+#include "libavutil/avstring.h"
+#include "libavutil/opt.h"
+#include "libavutil/time.h"
+#include "network.h"
+#include "url.h"
+
+typedef struct AMQPContext {
+ const AVClass *class;
+ amqp_connection_state_t conn;
+ amqp_socket_t *socket;
+ const char *exchange;
+ const char *routing_key;
+ int pkt_size;
+ int64_t connection_timeout;
+ int pkt_size_overflow;
+} AMQPContext;
+
+#define STR_LEN 1024
+#define DEFAULT_CHANNEL 1
+
+#define OFFSET(x) offsetof(AMQPContext, x)
+#define D AV_OPT_FLAG_DECODING_PARAM
+#define E AV_OPT_FLAG_ENCODING_PARAM
+static const AVOption options[] = {
+ { "pkt_size", "Maximum send/read packet size", OFFSET(pkt_size),
AV_OPT_TYPE_INT, { .i64 = 131072 }, 4096, INT_MAX, .flags = D | E },
+ { "exchange", "Exchange to send/read packets", OFFSET(exchange),
AV_OPT_TYPE_STRING, { .str = "amq.direct" }, 0, 0, .flags = D | E },
+ { "routing_key", "Key to filter streams", OFFSET(routing_key),
AV_OPT_TYPE_STRING, { .str = "amqp" }, 0, 0, .flags = D | E },
+ { "connection_timeout", "Initial connection timeout",
OFFSET(connection_timeout), AV_OPT_TYPE_DURATION, { .i64 = -1 }, -1,
INT_MAX, .flags = D | E},
+ { NULL }
+};
+
+static int amqp_proto_open(URLContext *h, const char *uri, int flags)
+{
+ int ret, server_msg;
+ char hostname[STR_LEN], credentials[STR_LEN];
+ char *credentials_decoded;
+ int port;
+ const char *user, *password = NULL;
+ char *p;
+ amqp_rpc_reply_t broker_reply;
+ struct timeval tval = { 0 };
+
+ AMQPContext *s = h->priv_data;
+
+ h->is_streamed = 1;
+ h->max_packet_size = s->pkt_size;
+
+ av_url_split(NULL, 0, credentials, sizeof(credentials),
+ hostname, sizeof(hostname), &port, NULL, 0, uri);
+
+ if (port < 0)
+ port = 5672;
+
+ if (hostname[0] == '\0' || port <= 0 || port > 65535 ) {
+ av_log(h, AV_LOG_ERROR, "Invalid hostname/port\n");
+ return AVERROR(EINVAL);
+ }
+
+ credentials_decoded = ff_urldecode(credentials, 0);
+ if (!credentials_decoded)
+ return AVERROR(ENOMEM);
+
+ p = strchr(credentials_decoded, ':');
+ if (p) {
+ *p = '\0';
+ password = p + 1;
+ }
+
+ if (!password || *password == '\0')
+ password = "guest";
+
+ user = credentials_decoded;
+ if (*user == '\0')
+ user = "guest";
+
+ s->conn = amqp_new_connection();
+ if (!s->conn) {
+ av_log(h, AV_LOG_ERROR, "Error creating connection\n");
+ return AVERROR_EXTERNAL;
+ }
+
+ s->socket = amqp_tcp_socket_new(s->conn);
+ if (!s->socket) {
+ av_log(h, AV_LOG_ERROR, "Error creating socket\n");
+ goto destroy_connection;
+ }
+
+ if (s->connection_timeout < 0)
+ s->connection_timeout = (h->rw_timeout > 0 ? h->rw_timeout :
5000000);
+
+ tval.tv_sec = s->connection_timeout / 1000000;
+ tval.tv_usec = s->connection_timeout % 1000000;
+ ret = amqp_socket_open_noblock(s->socket, hostname, port, &tval);
+
+ if (ret) {
+ av_log(h, AV_LOG_ERROR, "Error connecting to server\n");
+ goto destroy_connection;
+ }
+
+ broker_reply = amqp_login(s->conn, "/", 0, s->pkt_size, 0,
+ AMQP_SASL_METHOD_PLAIN, user, password);
+
+ if (broker_reply.reply_type != AMQP_RESPONSE_NORMAL) {
+ av_log(h, AV_LOG_ERROR, "Error login\n");
+ server_msg = AMQP_ACCESS_REFUSED;
+ goto close_connection;
+ }
+
+ amqp_channel_open(s->conn, DEFAULT_CHANNEL);
+ broker_reply = amqp_get_rpc_reply(s->conn);
+
+ if (broker_reply.reply_type != AMQP_RESPONSE_NORMAL) {
+ av_log(h, AV_LOG_ERROR, "Error set channel\n");
+ server_msg = AMQP_CHANNEL_ERROR;
+ goto close_connection;
+ }
+
+ if (h->flags & AVIO_FLAG_READ) {
+ amqp_bytes_t queuename;
+ char queuename_buff[STR_LEN];
+ amqp_queue_declare_ok_t *r;
+
+ r = amqp_queue_declare(s->conn, DEFAULT_CHANNEL, amqp_empty_bytes,
+ 0, 0, 0, 1, amqp_empty_table);
+ broker_reply = amqp_get_rpc_reply(s->conn);
+ if (!r || broker_reply.reply_type != AMQP_RESPONSE_NORMAL) {
+ av_log(h, AV_LOG_ERROR, "Error declare queue\n");
+ server_msg = AMQP_RESOURCE_ERROR;
+ goto close_channel;
+ }
+
+ /* store queuename */
+ queuename.bytes = queuename_buff;
+ queuename.len = FFMIN(r->queue.len, STR_LEN);
+ memcpy(queuename.bytes, r->queue.bytes, queuename.len);
+
+ amqp_queue_bind(s->conn, DEFAULT_CHANNEL, queuename,
amqp_cstring_bytes(s->exchange),
+ amqp_cstring_bytes(s->routing_key),
amqp_empty_table);
+
+ broker_reply = amqp_get_rpc_reply(s->conn);
+ if (broker_reply.reply_type != AMQP_RESPONSE_NORMAL) {
+ av_log(h, AV_LOG_ERROR, "Queue bind error\n");
+ server_msg = AMQP_INTERNAL_ERROR;
+ goto close_channel;
+ }
+
+ amqp_basic_consume(s->conn, DEFAULT_CHANNEL, queuename,
amqp_empty_bytes,
+ 0, 1, 0, amqp_empty_table);
+
+ broker_reply = amqp_get_rpc_reply(s->conn);
+ if (broker_reply.reply_type != AMQP_RESPONSE_NORMAL) {
+ av_log(h, AV_LOG_ERROR, "Set consume error\n");
+ server_msg = AMQP_INTERNAL_ERROR;
+ goto close_channel;
+ }
+ }
+
+ av_freep(&credentials_decoded);
+ return 0;
+
+close_channel:
+ amqp_channel_close(s->conn, DEFAULT_CHANNEL, server_msg);
+close_connection:
+ amqp_connection_close(s->conn, server_msg);
+destroy_connection:
+ amqp_destroy_connection(s->conn);
+
+ av_freep(&credentials_decoded);
+ return AVERROR_EXTERNAL;
+}
+
+static int amqp_proto_write(URLContext *h, const unsigned char *buf, int
size)
+{
+ int ret;
+ AMQPContext *s = h->priv_data;
+ int fd = amqp_socket_get_sockfd(s->socket);
+
+ amqp_bytes_t message = { size, (void *)buf };
+ amqp_basic_properties_t props;
+
+ ret = ff_network_wait_fd_timeout(fd, 1, h->rw_timeout,
&h->interrupt_callback);
+ if (ret)
+ return ret;
+
+ props._flags = AMQP_BASIC_CONTENT_TYPE_FLAG |
AMQP_BASIC_DELIVERY_MODE_FLAG;
+ props.content_type = amqp_cstring_bytes("octet/stream");
+ props.delivery_mode = 2; /* persistent delivery mode */
+
+ ret = amqp_basic_publish(s->conn, DEFAULT_CHANNEL,
amqp_cstring_bytes(s->exchange),
+ amqp_cstring_bytes(s->routing_key), 0, 0,
+ &props, message);
+
+ if (ret) {
+ av_log(h, AV_LOG_ERROR, "Error publish\n");
+ return AVERROR_EXTERNAL;
+ }
+
+ return size;
+}
+
+static int amqp_proto_read(URLContext *h, unsigned char *buf, int size)
+{
+ AMQPContext *s = h->priv_data;
+ int fd = amqp_socket_get_sockfd(s->socket);
+ int ret;
+
+ amqp_rpc_reply_t broker_reply;
+ amqp_envelope_t envelope;
+
+ ret = ff_network_wait_fd_timeout(fd, 0, h->rw_timeout,
&h->interrupt_callback);
+ if (ret)
+ return ret;
+
+ amqp_maybe_release_buffers(s->conn);
+ broker_reply = amqp_consume_message(s->conn, &envelope, NULL, 0);
+
+ if (broker_reply.reply_type != AMQP_RESPONSE_NORMAL)
+ return AVERROR_EXTERNAL;
+
+ if (envelope.message.body.len > size) {
+ s->pkt_size_overflow = FFMAX(s->pkt_size_overflow,
envelope.message.body.len);
+ av_log(h, AV_LOG_WARNING, "Message exceeds space in the buffer. "
+ "Message will be truncated. Setting
-pkt_size %d "
+ "may resolve this issue.\n",
s->pkt_size_overflow);
+ }
+ size = FFMIN(size, envelope.message.body.len);
+
+ memcpy(buf, envelope.message.body.bytes, size);
+ amqp_destroy_envelope(&envelope);
+
+ return size;
+}
+
+static int amqp_proto_close(URLContext *h)
+{
+ AMQPContext *s = h->priv_data;
+ amqp_channel_close(s->conn, DEFAULT_CHANNEL, AMQP_REPLY_SUCCESS);
+ amqp_connection_close(s->conn, AMQP_REPLY_SUCCESS);
+ amqp_destroy_connection(s->conn);
+
+ return 0;
+}
+
+static const AVClass amqp_context_class = {
+ .class_name = "amqp",
+ .item_name = av_default_item_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
+const URLProtocol ff_libamqp_protocol = {
+ .name = "amqp",
+ .url_close = amqp_proto_close,
+ .url_open = amqp_proto_open,
+ .url_read = amqp_proto_read,
+ .url_write = amqp_proto_write,
+ .priv_data_size = sizeof(AMQPContext),
+ .priv_data_class = &amqp_context_class,
+ .flags = URL_PROTOCOL_FLAG_NETWORK,
+};
diff --git a/libavformat/protocols.c b/libavformat/protocols.c
index 29fb99e7fa3..f1b8eab0fd6 100644
--- a/libavformat/protocols.c
+++ b/libavformat/protocols.c
@@ -60,6 +60,7 @@ extern const URLProtocol ff_tls_protocol;
extern const URLProtocol ff_udp_protocol;
extern const URLProtocol ff_udplite_protocol;
extern const URLProtocol ff_unix_protocol;
+extern const URLProtocol ff_libamqp_protocol;
extern const URLProtocol ff_librtmp_protocol;
extern const URLProtocol ff_librtmpe_protocol;
extern const URLProtocol ff_librtmps_protocol;
diff --git a/libavformat/version.h b/libavformat/version.h
index 4724269b3c4..a233b673512 100644
--- a/libavformat/version.h
+++ b/libavformat/version.h
@@ -32,8 +32,8 @@
// Major bumping may affect Ticket5467, 5421, 5451(compatibility with
Chromium)
// Also please add any ticket numbers that you believe might be affected
here
#define LIBAVFORMAT_VERSION_MAJOR 58
-#define LIBAVFORMAT_VERSION_MINOR 39
-#define LIBAVFORMAT_VERSION_MICRO 101
+#define LIBAVFORMAT_VERSION_MINOR 40
+#define LIBAVFORMAT_VERSION_MICRO 100
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
LIBAVFORMAT_VERSION_MINOR, \
--
2.25.0
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