ffserver.c

                    *q = '\0';
                stream->fmt = guess_stream_format(NULL, stream->filename, NULL);
                memset(&audio_enc, 0, sizeof(AVCodecContext));
                memset(&video_enc, 0, sizeof(AVCodecContext));
                audio_id = CODEC_ID_NONE;
                video_id = CODEC_ID_NONE;
                if (stream->fmt) {
                    audio_id = stream->fmt->audio_codec;
                    video_id = stream->fmt->video_codec;
                }
            }
        } else if (!strcasecmp(cmd, "Feed")) {
            get_arg(arg, sizeof(arg), &p);
            if (stream) {
                FFStream *sfeed;

                sfeed = first_feed;
                while (sfeed != NULL) {
                    if (!strcmp(sfeed->filename, arg))
                        break;
                    sfeed = sfeed->next_feed;
                }
                if (!sfeed) {
                    fprintf(stderr, "%s:%d: feed '%s' not defined\n",
                            filename, line_num, arg);
                } else {
                    stream->feed = sfeed;
                }
            }
        } else if (!strcasecmp(cmd, "Format")) {
            get_arg(arg, sizeof(arg), &p);
            if (!strcmp(arg, "status")) {
                stream->stream_type = STREAM_TYPE_STATUS;
                stream->fmt = NULL;
            } else {
                stream->stream_type = STREAM_TYPE_LIVE;
                /* jpeg cannot be used here, so use single frame jpeg */
                if (!strcmp(arg, "jpeg"))
                    strcpy(arg, "mjpeg");
                stream->fmt = guess_stream_format(arg, NULL, NULL);
                if (!stream->fmt) {
                    fprintf(stderr, "%s:%d: Unknown Format: %s\n",
                            filename, line_num, arg);
                    errors++;
                }
            }
            if (stream->fmt) {
                audio_id = stream->fmt->audio_codec;
                video_id = stream->fmt->video_codec;
            }
        } else if (!strcasecmp(cmd, "InputFormat")) {
            stream->ifmt = av_find_input_format(arg);
            if (!stream->ifmt) {
                fprintf(stderr, "%s:%d: Unknown input format: %s\n",
                        filename, line_num, arg);
            }
        } else if (!strcasecmp(cmd, "FaviconURL")) {
            if (stream && stream->stream_type == STREAM_TYPE_STATUS) {
                get_arg(stream->feed_filename, sizeof(stream->feed_filename), &p);
            } else {
                fprintf(stderr, "%s:%d: FaviconURL only permitted for status streams\n",
                            filename, line_num);
                errors++;
            }
        } else if (!strcasecmp(cmd, "Author")) {
            if (stream) {
                get_arg(stream->author, sizeof(stream->author), &p);
            }
        } else if (!strcasecmp(cmd, "Comment")) {
            if (stream) {
                get_arg(stream->comment, sizeof(stream->comment), &p);
            }
        } else if (!strcasecmp(cmd, "Copyright")) {
            if (stream) {
                get_arg(stream->copyright, sizeof(stream->copyright), &p);
            }
        } else if (!strcasecmp(cmd, "Title")) {
            if (stream) {
                get_arg(stream->title, sizeof(stream->title), &p);
            }
        } else if (!strcasecmp(cmd, "Preroll")) {
            get_arg(arg, sizeof(arg), &p);
            if (stream) {
                stream->prebuffer = atof(arg) * 1000;
            }
        } else if (!strcasecmp(cmd, "StartSendOnKey")) {
            if (stream) {
                stream->send_on_key = 1;
            }
        } else if (!strcasecmp(cmd, "AudioCodec")) {
            get_arg(arg, sizeof(arg), &p);
            audio_id = opt_audio_codec(arg);
            if (audio_id == CODEC_ID_NONE) {
                fprintf(stderr, "%s:%d: Unknown AudioCodec: %s\n",
                        filename, line_num, arg);
                errors++;
            }
        } else if (!strcasecmp(cmd, "VideoCodec")) {
            get_arg(arg, sizeof(arg), &p);
            video_id = opt_video_codec(arg);
            if (video_id == CODEC_ID_NONE) {
                fprintf(stderr, "%s:%d: Unknown VideoCodec: %s\n",
                        filename, line_num, arg);
                errors++;
            }
        } else if (!strcasecmp(cmd, "MaxTime")) {
            get_arg(arg, sizeof(arg), &p);
            if (stream) {
                stream->max_time = atof(arg) * 1000;
            }
        } else if (!strcasecmp(cmd, "AudioBitRate")) {
            get_arg(arg, sizeof(arg), &p);
            if (stream) {
                audio_enc.bit_rate = atoi(arg) * 1000;
            }
        } else if (!strcasecmp(cmd, "AudioChannels")) {
            get_arg(arg, sizeof(arg), &p);
            if (stream) {
                audio_enc.channels = atoi(arg);
            }
        } else if (!strcasecmp(cmd, "AudioSampleRate")) {
            get_arg(arg, sizeof(arg), &p);
            if (stream) {
                audio_enc.sample_rate = atoi(arg);
            }
        } else if (!strcasecmp(cmd, "AudioQuality")) {
            get_arg(arg, sizeof(arg), &p);
            if (stream) {
//                audio_enc.quality = atof(arg) * 1000;
            }
        } else if (!strcasecmp(cmd, "VideoBitRateRange")) {
            if (stream) {
                int minrate, maxrate;

                get_arg(arg, sizeof(arg), &p);

                if (sscanf(arg, "%d-%d", &minrate, &maxrate) == 2) {
                    video_enc.rc_min_rate = minrate * 1000;
                    video_enc.rc_max_rate = maxrate * 1000;
                } else {
                    fprintf(stderr, "%s:%d: Incorrect format for VideoBitRateRange -- should be <min>-<max>: %s\n",
                            filename, line_num, arg);
                    errors++;
                }
            }
        } else if (!strcasecmp(cmd, "Debug")) {
            if (stream) {
                get_arg(arg, sizeof(arg), &p);
                video_enc.debug = strtol(arg,0,0);
            }
        } else if (!strcasecmp(cmd, "Strict")) {
            if (stream) {
                get_arg(arg, sizeof(arg), &p);
                video_enc.strict_std_compliance = atoi(arg);
            }
        } else if (!strcasecmp(cmd, "VideoBufferSize")) {
            if (stream) {
                get_arg(arg, sizeof(arg), &p);
                video_enc.rc_buffer_size = atoi(arg) * 8*1024;
            }
        } else if (!strcasecmp(cmd, "VideoBitRateTolerance")) {
            if (stream) {
                get_arg(arg, sizeof(arg), &p);
                video_enc.bit_rate_tolerance = atoi(arg) * 1000;
            }
        } else if (!strcasecmp(cmd, "VideoBitRate")) {
            get_arg(arg, sizeof(arg), &p);
            if (stream) {
                video_enc.bit_rate = atoi(arg) * 1000;
            }
        } else if (!strcasecmp(cmd, "VideoSize")) {
            get_arg(arg, sizeof(arg), &p);
            if (stream) {
                parse_image_size(&video_enc.width, &video_enc.height, arg);
                if ((video_enc.width % 16) != 0 ||
                    (video_enc.height % 16) != 0) {
                    fprintf(stderr, "%s:%d: Image size must be a multiple of 16\n",
                            filename, line_num);
                    errors++;
                }
            }
        } else if (!strcasecmp(cmd, "VideoFrameRate")) {
            get_arg(arg, sizeof(arg), &p);
            if (stream) {
                video_enc.time_base.num= DEFAULT_FRAME_RATE_BASE;
                video_enc.time_base.den = (int)(strtod(arg, NULL) * video_enc.time_base.num);
            }
        } else if (!strcasecmp(cmd, "VideoGopSize")) {
            get_arg(arg, sizeof(arg), &p);
            if (stream) {
                video_enc.gop_size = atoi(arg);
            }
        } else if (!strcasecmp(cmd, "VideoIntraOnly")) {
            if (stream) {
                video_enc.gop_size = 1;
            }
        } else if (!strcasecmp(cmd, "VideoHighQuality")) {
            if (stream) {
                video_enc.mb_decision = FF_MB_DECISION_BITS;
            }
        } else if (!strcasecmp(cmd, "Video4MotionVector")) {
            if (stream) {
                video_enc.mb_decision = FF_MB_DECISION_BITS; //FIXME remove
                video_enc.flags |= CODEC_FLAG_4MV;
            }
        } else if (!strcasecmp(cmd, "VideoTag")) {
            get_arg(arg, sizeof(arg), &p);
            if ((strlen(arg) == 4) && stream) {
                video_enc.codec_tag = ff_get_fourcc(arg);
            }
        } else if (!strcasecmp(cmd, "BitExact")) {
            if (stream) {
                video_enc.flags |= CODEC_FLAG_BITEXACT;
            }
        } else if (!strcasecmp(cmd, "DctFastint")) {
            if (stream) {
                video_enc.dct_algo  = FF_DCT_FASTINT;
            }
        } else if (!strcasecmp(cmd, "IdctSimple")) {
            if (stream) {
                video_enc.idct_algo = FF_IDCT_SIMPLE;
            }
        } else if (!strcasecmp(cmd, "Qscale")) {
            get_arg(arg, sizeof(arg), &p);
            if (stream) {
                video_enc.flags |= CODEC_FLAG_QSCALE;
                video_enc.global_quality = FF_QP2LAMBDA * atoi(arg);
            }
        } else if (!strcasecmp(cmd, "VideoQDiff")) {
            get_arg(arg, sizeof(arg), &p);
            if (stream) {
                video_enc.max_qdiff = atoi(arg);
                if (video_enc.max_qdiff < 1 || video_enc.max_qdiff > 31) {
                    fprintf(stderr, "%s:%d: VideoQDiff out of range\n",
                            filename, line_num);
                    errors++;
                }
            }
        } else if (!strcasecmp(cmd, "VideoQMax")) {
            get_arg(arg, sizeof(arg), &p);
            if (stream) {
                video_enc.qmax = atoi(arg);
                if (video_enc.qmax < 1 || video_enc.qmax > 31) {
                    fprintf(stderr, "%s:%d: VideoQMax out of range\n",
                            filename, line_num);
                    errors++;
                }
            }
        } else if (!strcasecmp(cmd, "VideoQMin")) {
            get_arg(arg, sizeof(arg), &p);
            if (stream) {
                video_enc.qmin = atoi(arg);
                if (video_enc.qmin < 1 || video_enc.qmin > 31) {
                    fprintf(stderr, "%s:%d: VideoQMin out of range\n",
                            filename, line_num);
                    errors++;
                }
            }
        } else if (!strcasecmp(cmd, "LumaElim")) {
            get_arg(arg, sizeof(arg), &p);
            if (stream) {
                video_enc.luma_elim_threshold = atoi(arg);
            }
        } else if (!strcasecmp(cmd, "ChromaElim")) {
            get_arg(arg, sizeof(arg), &p);
            if (stream) {
                video_enc.chroma_elim_threshold = atoi(arg);
            }
        } else if (!strcasecmp(cmd, "LumiMask")) {
            get_arg(arg, sizeof(arg), &p);
            if (stream) {
                video_enc.lumi_masking = atof(arg);
            }
        } else if (!strcasecmp(cmd, "DarkMask")) {
            get_arg(arg, sizeof(arg), &p);
            if (stream) {
                video_enc.dark_masking = atof(arg);
            }
        } else if (!strcasecmp(cmd, "NoVideo")) {
            video_id = CODEC_ID_NONE;
        } else if (!strcasecmp(cmd, "NoAudio")) {
            audio_id = CODEC_ID_NONE;
        } else if (!strcasecmp(cmd, "ACL")) {
            IPAddressACL acl;
            struct hostent *he;

            get_arg(arg, sizeof(arg), &p);
            if (strcasecmp(arg, "allow") == 0) {
                acl.action = IP_ALLOW;
            } else if (strcasecmp(arg, "deny") == 0) {
                acl.action = IP_DENY;
            } else {
                fprintf(stderr, "%s:%d: ACL action '%s' is not ALLOW or DENY\n",
                        filename, line_num, arg);
                errors++;
            }

            get_arg(arg, sizeof(arg), &p);

            he = gethostbyname(arg);
            if (!he) {
                fprintf(stderr, "%s:%d: ACL refers to invalid host or ip address '%s'\n",
                        filename, line_num, arg);
                errors++;
            } else {
                /* Only take the first */
                acl.first.s_addr = ntohl(((struct in_addr *) he->h_addr_list[0])->s_addr);
                acl.last = acl.first;
            }

            get_arg(arg, sizeof(arg), &p);

            if (arg[0]) {
                he = gethostbyname(arg);
                if (!he) {
                    fprintf(stderr, "%s:%d: ACL refers to invalid host or ip address '%s'\n",
                            filename, line_num, arg);
                    errors++;
                } else {
                    /* Only take the first */
                    acl.last.s_addr = ntohl(((struct in_addr *) he->h_addr_list[0])->s_addr);
                }
            }

            if (!errors) {
                IPAddressACL *nacl = (IPAddressACL *) av_mallocz(sizeof(*nacl));
                IPAddressACL **naclp = 0;

                acl.next = 0;
                *nacl = acl;

                if (stream) {
                    naclp = &stream->acl;
                } else if (feed) {
                    naclp = &feed->acl;
                } else {
                    fprintf(stderr, "%s:%d: ACL found not in <stream> or <feed>\n",
                            filename, line_num);
                    errors++;
                }

                if (naclp) {
                    while (*naclp)
                        naclp = &(*naclp)->next;

                    *naclp = nacl;
                }
            }
        } else if (!strcasecmp(cmd, "RTSPOption")) {
            get_arg(arg, sizeof(arg), &p);
            if (stream) {
                av_freep(&stream->rtsp_option);
                stream->rtsp_option = av_strdup(arg);
            }
        } else if (!strcasecmp(cmd, "MulticastAddress")) {
            get_arg(arg, sizeof(arg), &p);
            if (stream) {
                if (!inet_aton(arg, &stream->multicast_ip)) {
                    fprintf(stderr, "%s:%d: Invalid IP address: %s\n",
                            filename, line_num, arg);
                    errors++;
                }
                stream->is_multicast = 1;
                stream->loop = 1; /* default is looping */
            }
        } else if (!strcasecmp(cmd, "MulticastPort")) {
            get_arg(arg, sizeof(arg), &p);
            if (stream) {
                stream->multicast_port = atoi(arg);
            }
        } else if (!strcasecmp(cmd, "MulticastTTL")) {
            get_arg(arg, sizeof(arg), &p);
            if (stream) {
                stream->multicast_ttl = atoi(arg);
            }
        } else if (!strcasecmp(cmd, "NoLoop")) {
            if (stream) {
                stream->loop = 0;
            }
        } else if (!strcasecmp(cmd, "</Stream>")) {
            if (!stream) {
                fprintf(stderr, "%s:%d: No corresponding <Stream> for </Stream>\n",
                        filename, line_num);
                errors++;
            }
            if (stream->feed && stream->fmt && strcmp(stream->fmt->name, "ffm") != 0) {
                if (audio_id != CODEC_ID_NONE) {
                    audio_enc.codec_type = CODEC_TYPE_AUDIO;
                    audio_enc.codec_id = audio_id;
                    add_codec(stream, &audio_enc);
                }
                if (video_id != CODEC_ID_NONE) {
                    video_enc.codec_type = CODEC_TYPE_VIDEO;
                    video_enc.codec_id = video_id;
                    add_codec(stream, &video_enc);
                }
            }
            stream = NULL;
        } else if (!strcasecmp(cmd, "<Redirect")) {
            /*********************************************/
            char *q;
            if (stream || feed || redirect) {
                fprintf(stderr, "%s:%d: Already in a tag\n",
                        filename, line_num);
                errors++;
            } else {
                redirect = av_mallocz(sizeof(FFStream));
                *last_stream = redirect;
                last_stream = &redirect->next;

                get_arg(redirect->filename, sizeof(redirect->filename), &p);
                q = strrchr(redirect->filename, '>');
                if (*q)
                    *q = '\0';
                redirect->stream_type = STREAM_TYPE_REDIRECT;
            }
        } else if (!strcasecmp(cmd, "URL")) {
            if (redirect) {
                get_arg(redirect->feed_filename, sizeof(redirect->feed_filename), &p);
            }
        } else if (!strcasecmp(cmd, "</Redirect>")) {
            if (!redirect) {
                fprintf(stderr, "%s:%d: No corresponding <Redirect> for </Redirect>\n",
                        filename, line_num);
                errors++;
            }
            if (!redirect->feed_filename[0]) {
                fprintf(stderr, "%s:%d: No URL found for <Redirect>\n",
                        filename, line_num);
                errors++;
            }
            redirect = NULL;
        } else if (!strcasecmp(cmd, "LoadModule")) {
            get_arg(arg, sizeof(arg), &p);
#ifdef HAVE_DLOPEN
            load_module(arg);
#else
            fprintf(stderr, "%s:%d: Module support not compiled into this version: '%s'\n",
                    filename, line_num, arg);
            errors++;
#endif
        } else {
            fprintf(stderr, "%s:%d: Incorrect keyword: '%s'\n",
                    filename, line_num, cmd);
            errors++;
        }
    }

    fclose(f);
    if (errors)
        return -1;
    else
        return 0;
}

static void show_banner(void)
{
    printf("ffserver version " FFMPEG_VERSION ", Copyright (c) 2000-2006 Fabrice Bellard, et al.\n");
}

static void show_help(void)
{
    show_banner();
    printf("usage: ffserver [-L] [-h] [-f configfile]\n"
           "Hyper fast multi format Audio/Video streaming server\n"
           "\n"
           "-L            : print the LICENSE\n"
           "-h            : this help\n"
           "-f configfile : use configfile instead of /etc/ffserver.conf\n"
           );
}

static void show_license(void)
{
    show_banner();
    printf(
    "FFmpeg is free software; you can redistribute it and/or\n"
    "modify it under the terms of the GNU Lesser General Public\n"
    "License as published by the Free Software Foundation; either\n"
    "version 2.1 of the License, or (at your option) any later version.\n"
    "\n"
    "FFmpeg is distributed in the hope that it will be useful,\n"
    "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
    "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU\n"
    "Lesser General Public License for more details.\n"
    "\n"
    "You should have received a copy of the GNU Lesser General Public\n"
    "License along with FFmpeg; if not, write to the Free Software\n"
    "Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA\n"
    );
}

static void handle_child_exit(int sig)
{
    pid_t pid;
    int status;

    while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
        FFStream *feed;

        for (feed = first_feed; feed; feed = feed->next) {
            if (feed->pid == pid) {
                int uptime = time(0) - feed->pid_start;

                feed->pid = 0;
                fprintf(stderr, "%s: Pid %d exited with status %d after %d seconds\n", feed->filename, pid, status, uptime);

                if (uptime < 30) {
                    /* Turn off any more restarts */
                    feed->child_argv = 0;
                }
            }
        }
    }

    need_to_start_children = 1;
}

int main(int argc, char **argv)
{
    const char *config_filename;
    int c;
    struct sigaction sigact;

    av_register_all();

    config_filename = "/etc/ffserver.conf";

    my_program_name = argv[0];
    my_program_dir = getcwd(0, 0);
    ffserver_daemon = 1;

    for(;;) {
        c = getopt(argc, argv, "ndLh?f:");
        if (c == -1)
            break;
        switch(c) {
        case 'L':
            show_license();
            exit(1);
        case '?':
        case 'h':
            show_help();
            exit(1);
        case 'n':
            no_launch = 1;
            break;
        case 'd':
            ffserver_debug = 1;
            ffserver_daemon = 0;
            break;
        case 'f':
            config_filename = optarg;
            break;
        default:
            exit(2);
        }
    }

    putenv("http_proxy");               /* Kill the http_proxy */

    av_init_random(av_gettime() + (getpid() << 16), &random_state);

    /* address on which the server will handle HTTP connections */
    my_http_addr.sin_family = AF_INET;
    my_http_addr.sin_port = htons (8080);
    my_http_addr.sin_addr.s_addr = htonl (INADDR_ANY);

    /* address on which the server will handle RTSP connections */
    my_rtsp_addr.sin_family = AF_INET;
    my_rtsp_addr.sin_port = htons (5454);
    my_rtsp_addr.sin_addr.s_addr = htonl (INADDR_ANY);

    nb_max_connections = 5;
    max_bandwidth = 1000;
    first_stream = NULL;
    logfilename[0] = '\0';

    memset(&sigact, 0, sizeof(sigact));
    sigact.sa_handler = handle_child_exit;
    sigact.sa_flags = SA_NOCLDSTOP | SA_RESTART;
    sigaction(SIGCHLD, &sigact, 0);

    if (parse_ffconfig(config_filename) < 0) {
        fprintf(stderr, "Incorrect config file - exiting.\n");
        exit(1);
    }

    build_file_streams();

    build_feed_streams();

    compute_bandwidth();

    /* put the process in background and detach it from its TTY */
    if (ffserver_daemon) {
        int pid;

        pid = fork();
        if (pid < 0) {
            perror("fork");
            exit(1);
        } else if (pid > 0) {
            /* parent : exit */
            exit(0);
        } else {
            /* child */
            setsid();
            chdir("/");
            close(0);
            open("/dev/null", O_RDWR);
            if (strcmp(logfilename, "-") != 0) {
                close(1);
                dup(0);
            }
            close(2);
            dup(0);
        }
    }

    /* signal init */
    signal(SIGPIPE, SIG_IGN);

    /* open log file if needed */
    if (logfilename[0] != '\0') {
        if (!strcmp(logfilename, "-"))
            logfile = stdout;
        else
            logfile = fopen(logfilename, "w");
    }

    if (http_server() < 0) {
        fprintf(stderr, "Could not start server\n");
        exit(1);
    }

    return 0;
}