mirror of
https://github.com/xenia-project/FFmpeg.git
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e9510dc032
Signed-off-by: Paul B Mahol <onemda@gmail.com>
275 lines
7.5 KiB
C
275 lines
7.5 KiB
C
/*
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* Copyright (c) 2013 Stefano Sabatini
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* receive commands through libzeromq and broker them to filters
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*/
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#include <zmq.h>
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#include "libavutil/avstring.h"
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#include "libavutil/bprint.h"
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#include "libavutil/opt.h"
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#include "avfilter.h"
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#include "internal.h"
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#include "audio.h"
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#include "video.h"
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typedef struct ZMQContext {
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const AVClass *class;
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void *zmq;
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void *responder;
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char *bind_address;
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int command_count;
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} ZMQContext;
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#define OFFSET(x) offsetof(ZMQContext, x)
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_VIDEO_PARAM
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static const AVOption options[] = {
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{ "bind_address", "set bind address", OFFSET(bind_address), AV_OPT_TYPE_STRING, {.str = "tcp://*:5555"}, 0, 0, FLAGS },
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{ "b", "set bind address", OFFSET(bind_address), AV_OPT_TYPE_STRING, {.str = "tcp://*:5555"}, 0, 0, FLAGS },
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{ NULL }
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};
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static av_cold int init(AVFilterContext *ctx)
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{
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ZMQContext *zmq = ctx->priv;
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zmq->zmq = zmq_ctx_new();
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if (!zmq->zmq) {
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av_log(ctx, AV_LOG_ERROR,
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"Could not create ZMQ context: %s\n", zmq_strerror(errno));
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return AVERROR_EXTERNAL;
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}
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zmq->responder = zmq_socket(zmq->zmq, ZMQ_REP);
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if (!zmq->responder) {
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av_log(ctx, AV_LOG_ERROR,
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"Could not create ZMQ socket: %s\n", zmq_strerror(errno));
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return AVERROR_EXTERNAL;
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}
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if (zmq_bind(zmq->responder, zmq->bind_address) == -1) {
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av_log(ctx, AV_LOG_ERROR,
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"Could not bind ZMQ socket to address '%s': %s\n",
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zmq->bind_address, zmq_strerror(errno));
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return AVERROR_EXTERNAL;
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}
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zmq->command_count = -1;
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return 0;
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}
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static void av_cold uninit(AVFilterContext *ctx)
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{
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ZMQContext *zmq = ctx->priv;
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zmq_close(zmq->responder);
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zmq_ctx_destroy(zmq->zmq);
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}
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typedef struct Command {
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char *target, *command, *arg;
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} Command;
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#define SPACES " \f\t\n\r"
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static int parse_command(Command *cmd, const char *command_str, void *log_ctx)
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{
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const char **buf = &command_str;
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cmd->target = av_get_token(buf, SPACES);
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if (!cmd->target || !cmd->target[0]) {
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av_log(log_ctx, AV_LOG_ERROR,
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"No target specified in command '%s'\n", command_str);
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return AVERROR(EINVAL);
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}
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cmd->command = av_get_token(buf, SPACES);
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if (!cmd->command || !cmd->command[0]) {
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av_log(log_ctx, AV_LOG_ERROR,
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"No command specified in command '%s'\n", command_str);
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return AVERROR(EINVAL);
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}
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cmd->arg = av_get_token(buf, SPACES);
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return 0;
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}
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static int recv_msg(AVFilterContext *ctx, char **buf, int *buf_size)
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{
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ZMQContext *zmq = ctx->priv;
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zmq_msg_t msg;
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int ret = 0;
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if (zmq_msg_init(&msg) == -1) {
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av_log(ctx, AV_LOG_WARNING,
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"Could not initialize receive message: %s\n", zmq_strerror(errno));
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return AVERROR_EXTERNAL;
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}
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if (zmq_msg_recv(&msg, zmq->responder, ZMQ_DONTWAIT) == -1) {
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if (errno != EAGAIN)
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av_log(ctx, AV_LOG_WARNING,
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"Could not receive message: %s\n", zmq_strerror(errno));
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ret = AVERROR_EXTERNAL;
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goto end;
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}
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*buf_size = zmq_msg_size(&msg) + 1;
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*buf = av_malloc(*buf_size);
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if (!*buf) {
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ret = AVERROR(ENOMEM);
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goto end;
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}
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memcpy(*buf, zmq_msg_data(&msg), *buf_size);
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(*buf)[*buf_size-1] = 0;
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end:
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zmq_msg_close(&msg);
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return ret;
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}
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static int filter_frame(AVFilterLink *inlink, AVFrame *ref)
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{
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AVFilterContext *ctx = inlink->dst;
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ZMQContext *zmq = ctx->priv;
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while (1) {
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char cmd_buf[1024];
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char *recv_buf, *send_buf;
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int recv_buf_size;
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Command cmd = {0};
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int ret;
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/* receive command */
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if (recv_msg(ctx, &recv_buf, &recv_buf_size) < 0)
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break;
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zmq->command_count++;
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/* parse command */
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if (parse_command(&cmd, recv_buf, ctx) < 0) {
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av_log(ctx, AV_LOG_ERROR, "Could not parse command #%d\n", zmq->command_count);
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goto end;
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}
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/* process command */
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av_log(ctx, AV_LOG_VERBOSE,
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"Processing command #%d target:%s command:%s arg:%s\n",
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zmq->command_count, cmd.target, cmd.command, cmd.arg);
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ret = avfilter_graph_send_command(inlink->graph,
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cmd.target, cmd.command, cmd.arg,
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cmd_buf, sizeof(cmd_buf),
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AVFILTER_CMD_FLAG_ONE);
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send_buf = av_asprintf("%d %s%s%s",
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-ret, av_err2str(ret), cmd_buf[0] ? "\n" : "", cmd_buf);
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if (!send_buf) {
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ret = AVERROR(ENOMEM);
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goto end;
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}
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av_log(ctx, AV_LOG_VERBOSE,
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"Sending command reply for command #%d:\n%s\n",
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zmq->command_count, send_buf);
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if (zmq_send(zmq->responder, send_buf, strlen(send_buf), 0) == -1)
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av_log(ctx, AV_LOG_ERROR, "Failed to send reply for command #%d: %s\n",
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zmq->command_count, zmq_strerror(ret));
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end:
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av_freep(&send_buf);
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av_freep(&recv_buf);
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recv_buf_size = 0;
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av_freep(&cmd.target);
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av_freep(&cmd.command);
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av_freep(&cmd.arg);
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}
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return ff_filter_frame(ctx->outputs[0], ref);
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}
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#if CONFIG_ZMQ_FILTER
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#define zmq_options options
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AVFILTER_DEFINE_CLASS(zmq);
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static const AVFilterPad zmq_inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.filter_frame = filter_frame,
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},
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{ NULL }
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};
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static const AVFilterPad zmq_outputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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},
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{ NULL }
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};
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AVFilter ff_vf_zmq = {
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.name = "zmq",
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.description = NULL_IF_CONFIG_SMALL("Receive commands through ZMQ and broker them to filters."),
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.init = init,
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.uninit = uninit,
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.priv_size = sizeof(ZMQContext),
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.inputs = zmq_inputs,
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.outputs = zmq_outputs,
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.priv_class = &zmq_class,
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};
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#endif
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#if CONFIG_AZMQ_FILTER
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#define azmq_options options
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AVFILTER_DEFINE_CLASS(azmq);
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static const AVFilterPad azmq_inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_AUDIO,
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.filter_frame = filter_frame,
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},
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{ NULL }
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};
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static const AVFilterPad azmq_outputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_AUDIO,
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},
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{ NULL }
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};
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AVFilter ff_af_azmq = {
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.name = "azmq",
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.description = NULL_IF_CONFIG_SMALL("Receive commands through ZMQ and broker them to filters."),
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.init = init,
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.uninit = uninit,
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.priv_size = sizeof(ZMQContext),
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.inputs = azmq_inputs,
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.outputs = azmq_outputs,
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.priv_class = &azmq_class,
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};
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#endif
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