mirror of https://github.com/FFmpeg/FFmpeg.git
Stefano Sabatini
12 years ago
parent
dc7656279a
commit
7ddb0ef9af
7 changed files with 329 additions and 1 deletions
@ -0,0 +1,276 @@ |
||||
/*
|
||||
* 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 |
||||
*/ |
||||
|
||||
/**
|
||||
* @file |
||||
* receive commands through libzeromq and broker them to filters |
||||
*/ |
||||
|
||||
#include <zmq.h> |
||||
#include "libavutil/avstring.h" |
||||
#include "libavutil/bprint.h" |
||||
#include "libavutil/opt.h" |
||||
#include "avfilter.h" |
||||
#include "internal.h" |
||||
#include "avfiltergraph.h" |
||||
#include "audio.h" |
||||
#include "video.h" |
||||
|
||||
typedef struct { |
||||
const AVClass *class; |
||||
void *zmq; |
||||
void *responder; |
||||
char *bind_address; |
||||
int command_count; |
||||
} ZMQContext; |
||||
|
||||
#define OFFSET(x) offsetof(ZMQContext, x) |
||||
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_VIDEO_PARAM |
||||
static const AVOption options[] = { |
||||
{ "bind_address", "set bind address", OFFSET(bind_address), AV_OPT_TYPE_STRING, {.str = "tcp://*:5555"}, 0, 0, FLAGS }, |
||||
{ "b", "set bind address", OFFSET(bind_address), AV_OPT_TYPE_STRING, {.str = "tcp://*:5555"}, 0, 0, FLAGS }, |
||||
{ NULL } |
||||
}; |
||||
|
||||
static av_cold int init(AVFilterContext *ctx) |
||||
{ |
||||
ZMQContext *zmq = ctx->priv; |
||||
|
||||
zmq->zmq = zmq_ctx_new(); |
||||
if (!zmq->zmq) { |
||||
av_log(ctx, AV_LOG_ERROR, |
||||
"Could not create ZMQ context: %s\n", zmq_strerror(errno)); |
||||
return AVERROR_EXTERNAL; |
||||
} |
||||
|
||||
zmq->responder = zmq_socket(zmq->zmq, ZMQ_REP); |
||||
if (!zmq->responder) { |
||||
av_log(ctx, AV_LOG_ERROR, |
||||
"Could not create ZMQ socket: %s\n", zmq_strerror(errno)); |
||||
return AVERROR_EXTERNAL; |
||||
} |
||||
|
||||
if (zmq_bind(zmq->responder, zmq->bind_address) == -1) { |
||||
av_log(ctx, AV_LOG_ERROR, |
||||
"Could not bind ZMQ socket to address '%s': %s\n", |
||||
zmq->bind_address, zmq_strerror(errno)); |
||||
return AVERROR_EXTERNAL; |
||||
} |
||||
|
||||
zmq->command_count = -1; |
||||
return 0; |
||||
} |
||||
|
||||
static void av_cold uninit(AVFilterContext *ctx) |
||||
{ |
||||
ZMQContext *zmq = ctx->priv; |
||||
|
||||
zmq_close(zmq->responder); |
||||
zmq_ctx_destroy(zmq->zmq); |
||||
} |
||||
|
||||
typedef struct { |
||||
char *target, *command, *arg; |
||||
} Command; |
||||
|
||||
#define SPACES " \f\t\n\r" |
||||
|
||||
static int parse_command(Command *cmd, const char *command_str, void *log_ctx) |
||||
{ |
||||
const char **buf = &command_str; |
||||
|
||||
cmd->target = av_get_token(buf, SPACES); |
||||
if (!cmd->target || !cmd->target[0]) { |
||||
av_log(log_ctx, AV_LOG_ERROR, |
||||
"No target specified in command '%s'\n", command_str); |
||||
return AVERROR(EINVAL); |
||||
} |
||||
|
||||
cmd->command = av_get_token(buf, SPACES); |
||||
if (!cmd->command || !cmd->command[0]) { |
||||
av_log(log_ctx, AV_LOG_ERROR, |
||||
"No command specified in command '%s'\n", command_str); |
||||
return AVERROR(EINVAL); |
||||
} |
||||
|
||||
cmd->arg = av_get_token(buf, SPACES); |
||||
return 0; |
||||
} |
||||
|
||||
static int recv_msg(AVFilterContext *ctx, char **buf, int *buf_size) |
||||
{ |
||||
ZMQContext *zmq = ctx->priv; |
||||
zmq_msg_t msg; |
||||
int ret = 0; |
||||
|
||||
if (zmq_msg_init(&msg) == -1) { |
||||
av_log(ctx, AV_LOG_WARNING, |
||||
"Could not initialize receive message: %s\n", zmq_strerror(errno)); |
||||
return AVERROR_EXTERNAL; |
||||
} |
||||
|
||||
if (zmq_msg_recv(&msg, zmq->responder, ZMQ_DONTWAIT) == -1) { |
||||
if (errno != EAGAIN) |
||||
av_log(ctx, AV_LOG_WARNING, |
||||
"Could not receive message: %s\n", zmq_strerror(errno)); |
||||
ret = AVERROR_EXTERNAL; |
||||
goto end; |
||||
} |
||||
|
||||
*buf_size = zmq_msg_size(&msg) + 1; |
||||
*buf = av_malloc(*buf_size); |
||||
if (!*buf) { |
||||
ret = AVERROR(ENOMEM); |
||||
goto end; |
||||
} |
||||
memcpy(*buf, zmq_msg_data(&msg), *buf_size); |
||||
(*buf)[*buf_size-1] = 0; |
||||
|
||||
end: |
||||
zmq_msg_close(&msg); |
||||
return ret; |
||||
} |
||||
|
||||
static int filter_frame(AVFilterLink *inlink, AVFrame *ref) |
||||
{ |
||||
AVFilterContext *ctx = inlink->dst; |
||||
ZMQContext *zmq = ctx->priv; |
||||
|
||||
while (1) { |
||||
char cmd_buf[1024]; |
||||
char *recv_buf, *send_buf; |
||||
int recv_buf_size; |
||||
Command cmd = {0}; |
||||
int ret; |
||||
|
||||
/* receive command */ |
||||
if (recv_msg(ctx, &recv_buf, &recv_buf_size) < 0) |
||||
break; |
||||
zmq->command_count++; |
||||
|
||||
/* parse command */ |
||||
if (parse_command(&cmd, recv_buf, ctx) < 0) { |
||||
av_log(ctx, AV_LOG_ERROR, "Could not parse command #%d\n", zmq->command_count); |
||||
goto end; |
||||
} |
||||
|
||||
/* process command */ |
||||
av_log(ctx, AV_LOG_VERBOSE, |
||||
"Processing command #%d target:%s command:%s arg:%s\n", |
||||
zmq->command_count, cmd.target, cmd.command, cmd.arg); |
||||
ret = avfilter_graph_send_command(inlink->graph, |
||||
cmd.target, cmd.command, cmd.arg, |
||||
cmd_buf, sizeof(cmd_buf), |
||||
AVFILTER_CMD_FLAG_ONE); |
||||
send_buf = av_asprintf("%d %s%s%s", |
||||
-ret, av_err2str(ret), cmd_buf[0] ? "\n" : "", cmd_buf); |
||||
if (!send_buf) { |
||||
ret = AVERROR(ENOMEM); |
||||
goto end; |
||||
} |
||||
av_log(ctx, AV_LOG_VERBOSE, |
||||
"Sending command reply for command #%d:\n%s\n", |
||||
zmq->command_count, send_buf); |
||||
if (zmq_send(zmq->responder, send_buf, strlen(send_buf), 0) == -1) |
||||
av_log(ctx, AV_LOG_ERROR, "Failed to send reply for command #%d: %s\n", |
||||
zmq->command_count, zmq_strerror(ret)); |
||||
|
||||
end: |
||||
av_freep(&send_buf); |
||||
av_freep(&recv_buf); |
||||
recv_buf_size = 0; |
||||
av_freep(&cmd.target); |
||||
av_freep(&cmd.command); |
||||
av_freep(&cmd.arg); |
||||
} |
||||
|
||||
return ff_filter_frame(ctx->outputs[0], ref); |
||||
} |
||||
|
||||
#if CONFIG_ZMQ_FILTER |
||||
|
||||
#define zmq_options options |
||||
AVFILTER_DEFINE_CLASS(zmq); |
||||
|
||||
static const AVFilterPad zmq_inputs[] = { |
||||
{ |
||||
.name = "default", |
||||
.type = AVMEDIA_TYPE_VIDEO, |
||||
.filter_frame = filter_frame, |
||||
}, |
||||
{ NULL } |
||||
}; |
||||
|
||||
static const AVFilterPad zmq_outputs[] = { |
||||
{ |
||||
.name = "default", |
||||
.type = AVMEDIA_TYPE_VIDEO, |
||||
}, |
||||
{ NULL } |
||||
}; |
||||
|
||||
AVFilter avfilter_vf_zmq = { |
||||
.name = "zmq", |
||||
.description = NULL_IF_CONFIG_SMALL("Receive commands through ZMQ and broker them to filters."), |
||||
.init = init, |
||||
.uninit = uninit, |
||||
.priv_size = sizeof(ZMQContext), |
||||
.inputs = zmq_inputs, |
||||
.outputs = zmq_outputs, |
||||
.priv_class = &zmq_class, |
||||
}; |
||||
|
||||
#endif |
||||
|
||||
#if CONFIG_AZMQ_FILTER |
||||
|
||||
#define azmq_options options |
||||
AVFILTER_DEFINE_CLASS(azmq); |
||||
|
||||
static const AVFilterPad azmq_inputs[] = { |
||||
{ |
||||
.name = "default", |
||||
.type = AVMEDIA_TYPE_AUDIO, |
||||
.get_audio_buffer = ff_null_get_audio_buffer, |
||||
.filter_frame = filter_frame, |
||||
}, |
||||
{ NULL } |
||||
}; |
||||
|
||||
static const AVFilterPad azmq_outputs[] = { |
||||
{ |
||||
.name = "default", |
||||
.type = AVMEDIA_TYPE_AUDIO, |
||||
}, |
||||
{ NULL } |
||||
}; |
||||
|
||||
AVFilter avfilter_af_azmq = { |
||||
.name = "azmq", |
||||
.description = NULL_IF_CONFIG_SMALL("Receive commands through ZMQ and broker them to filters."), |
||||
.init = init, |
||||
.uninit = uninit, |
||||
.priv_size = sizeof(ZMQContext), |
||||
.inputs = azmq_inputs, |
||||
.outputs = azmq_outputs, |
||||
.priv_class = &azmq_class, |
||||
}; |
||||
|
||||
#endif |
||||
Loading…
Reference in new issue