/*
  * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
  *
  * 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 <float.h>

 #include "libavutil/opt.h"
 #include "libavutil/parseutils.h"
 #include "libavutil/avstring.h"
 #include "libavutil/pixdesc.h"
 #include "libavutil/avassert.h"
 
 // FIXME those are internal headers, ffserver _really_ shouldn't use them
 #include "libavformat/ffm.h"
 
 #include "cmdutils.h"
 #include "ffserver_config.h"
 

 #define MAX_CHILD_ARGS 64
 

 static int ffserver_save_avoption(const char *opt, const char *arg, int type,

                                   FFServerConfig *config);

 static void vreport_config_error(const char *filename, int line_num,
                                  int log_level, int *errors, const char *fmt,
                                  va_list vl);
 static void report_config_error(const char *filename, int line_num,
                                 int log_level, int *errors, const char *fmt,
                                 ...);

 #define ERROR(...)   report_config_error(config->filename, config->line_num,\
                                          AV_LOG_ERROR, &config->errors,  __VA_ARGS__)
 #define WARNING(...) report_config_error(config->filename, config->line_num,\
                                          AV_LOG_WARNING, &config->warnings, __VA_ARGS__)
 

 /* FIXME: make ffserver work with IPv6 */
 /* resolve host with also IP address parsing */
 static int resolve_host(struct in_addr *sin_addr, const char *hostname)
 {
 
     if (!ff_inet_aton(hostname, sin_addr)) {
 #if HAVE_GETADDRINFO
         struct addrinfo *ai, *cur;
         struct addrinfo hints = { 0 };
         hints.ai_family = AF_INET;
         if (getaddrinfo(hostname, NULL, &hints, &ai))
             return -1;
         /* getaddrinfo returns a linked list of addrinfo structs.
          * Even if we set ai_family = AF_INET above, make sure
          * that the returned one actually is of the correct type. */
         for (cur = ai; cur; cur = cur->ai_next) {
             if (cur->ai_family == AF_INET) {
                 *sin_addr = ((struct sockaddr_in *)cur->ai_addr)->sin_addr;
                 freeaddrinfo(ai);
                 return 0;
             }
         }
         freeaddrinfo(ai);
         return -1;
 #else
         struct hostent *hp;
         hp = gethostbyname(hostname);
         if (!hp)
             return -1;
         memcpy(sin_addr, hp->h_addr_list[0], sizeof(struct in_addr));
 #endif
     }
     return 0;
 }
 
 void ffserver_get_arg(char *buf, int buf_size, const char **pp)
 {
     const char *p;
     char *q;

     int quote = 0;

 
     p = *pp;
     q = buf;

 
     while (av_isspace(*p)) p++;
 

     if (*p == '\"' || *p == '\'')
         quote = *p++;

 
     while (*p != '\0') {
         if (quote && *p == quote || !quote && av_isspace(*p))

             break;
         if ((q - buf) < buf_size - 1)
             *q++ = *p;
         p++;
     }

     *q = '\0';
     if (quote && *p == quote)
         p++;
     *pp = p;
 }
 
 void ffserver_parse_acl_row(FFServerStream *stream, FFServerStream* feed,
                             FFServerIPAddressACL *ext_acl,
                             const char *p, const char *filename, int line_num)
 {
     char arg[1024];
     FFServerIPAddressACL acl;
     int errors = 0;
 
     ffserver_get_arg(arg, sizeof(arg), &p);
     if (av_strcasecmp(arg, "allow") == 0)
         acl.action = IP_ALLOW;
     else if (av_strcasecmp(arg, "deny") == 0)
         acl.action = IP_DENY;
     else {

         fprintf(stderr, "%s:%d: ACL action '%s' should be ALLOW or DENY.\n",

                 filename, line_num, arg);
         errors++;
     }
 
     ffserver_get_arg(arg, sizeof(arg), &p);
 

     if (resolve_host(&acl.first, arg)) {

         fprintf(stderr,
                 "%s:%d: ACL refers to invalid host or IP address '%s'\n",

                 filename, line_num, arg);
         errors++;
     } else
         acl.last = acl.first;
 
     ffserver_get_arg(arg, sizeof(arg), &p);
 
     if (arg[0]) {

         if (resolve_host(&acl.last, arg)) {

             fprintf(stderr,
                     "%s:%d: ACL refers to invalid host or IP address '%s'\n",

                     filename, line_num, arg);
             errors++;
         }
     }
 
     if (!errors) {
         FFServerIPAddressACL *nacl = av_mallocz(sizeof(*nacl));
         FFServerIPAddressACL **naclp = 0;
 
         acl.next = 0;
         *nacl = acl;
 
         if (stream)
             naclp = &stream->acl;
         else if (feed)
             naclp = &feed->acl;
         else if (ext_acl)
             naclp = &ext_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
             av_free(nacl);
     }
 }
 
 /* add a codec and set the default parameters */

 static void add_codec(FFServerStream *stream, AVCodecContext *av,
                       FFServerConfig *config)

 {
     AVStream *st;

     AVDictionary **opts, *recommended = NULL;
     char *enc_config;

 
     if(stream->nb_streams >= FF_ARRAY_ELEMS(stream->streams))
         return;
 

     opts = av->codec_type == AVMEDIA_TYPE_AUDIO ?
            &config->audio_opts : &config->video_opts;

     av_dict_copy(&recommended, *opts, 0);

     av_opt_set_dict2(av->priv_data, opts, AV_OPT_SEARCH_CHILDREN);
     av_opt_set_dict2(av, opts, AV_OPT_SEARCH_CHILDREN);

     if (av_dict_count(*opts))
         av_log(NULL, AV_LOG_WARNING,

                "Something is wrong, %d options are not set!\n",
                av_dict_count(*opts));

     if (!config->stream_use_defaults) {
         switch(av->codec_type) {
         case AVMEDIA_TYPE_AUDIO:
             if (av->bit_rate == 0)
                 report_config_error(config->filename, config->line_num,
                                     AV_LOG_ERROR, &config->errors,
                                     "audio bit rate is not set\n");
             if (av->sample_rate == 0)
                 report_config_error(config->filename, config->line_num,
                                     AV_LOG_ERROR, &config->errors,
                                     "audio sample rate is not set\n");
             break;
         case AVMEDIA_TYPE_VIDEO:
             if (av->width == 0 || av->height == 0)
                 report_config_error(config->filename, config->line_num,
                                     AV_LOG_ERROR, &config->errors,
                                     "video size is not set\n");
             break;
         default:
             av_assert0(0);
         }
         goto done;
     }
 
     /* stream_use_defaults = true */
 

     /* compute default parameters */
     switch(av->codec_type) {
     case AVMEDIA_TYPE_AUDIO:

         if (!av_dict_get(recommended, "b", NULL, 0)) {

             av->bit_rate = 64000;

             av_dict_set_int(&recommended, "b", av->bit_rate, 0);

             WARNING("Setting default value for audio bit rate = %d. "
                     "Use NoDefaults to disable it.\n",
                     av->bit_rate);

         }

         if (!av_dict_get(recommended, "ar", NULL, 0)) {

             av->sample_rate = 22050;

             av_dict_set_int(&recommended, "ar", av->sample_rate, 0);

             WARNING("Setting default value for audio sample rate = %d. "
                     "Use NoDefaults to disable it.\n",
                     av->sample_rate);

         }

         if (!av_dict_get(recommended, "ac", NULL, 0)) {

             av->channels = 1;

             av_dict_set_int(&recommended, "ac", av->channels, 0);

             WARNING("Setting default value for audio channel count = %d. "
                     "Use NoDefaults to disable it.\n",
                     av->channels);

         }

         break;
     case AVMEDIA_TYPE_VIDEO:

         if (!av_dict_get(recommended, "b", NULL, 0)) {

             av->bit_rate = 64000;

             av_dict_set_int(&recommended, "b", av->bit_rate, 0);

             WARNING("Setting default value for video bit rate = %d. "
                     "Use NoDefaults to disable it.\n",
                     av->bit_rate);

         }

         if (!av_dict_get(recommended, "time_base", NULL, 0)){

             av->time_base.den = 5;
             av->time_base.num = 1;

             av_dict_set(&recommended, "time_base", "1/5", 0);

             WARNING("Setting default value for video frame rate = %d. "
                     "Use NoDefaults to disable it.\n",
                     av->time_base.den);

         }

         if (!av_dict_get(recommended, "video_size", NULL, 0)) {

             av->width = 160;
             av->height = 128;

             av_dict_set(&recommended, "video_size", "160x128", 0);

             WARNING("Setting default value for video size = %dx%d. "
                     "Use NoDefaults to disable it.\n",
                     av->width, av->height);

         }
         /* Bitrate tolerance is less for streaming */

         if (!av_dict_get(recommended, "bt", NULL, 0)) {

             av->bit_rate_tolerance = FFMAX(av->bit_rate / 4,
                       (int64_t)av->bit_rate*av->time_base.num/av->time_base.den);

             av_dict_set_int(&recommended, "bt", av->bit_rate_tolerance, 0);

             WARNING("Setting default value for video bit rate tolerance = %d. "
                     "Use NoDefaults to disable it.\n",
                     av->bit_rate_tolerance);

         }

         if (!av_dict_get(recommended, "rc_eq", NULL, 0)) {

             av->rc_eq = av_strdup("tex^qComp");

             av_dict_set(&recommended, "rc_eq", "tex^qComp", 0);

             WARNING("Setting default value for video rate control equation = "
                     "%s. Use NoDefaults to disable it.\n",

                     av->rc_eq);

         }

         if (!av_dict_get(recommended, "maxrate", NULL, 0)) {

             av->rc_max_rate = av->bit_rate * 2;

             av_dict_set_int(&recommended, "maxrate", av->rc_max_rate, 0);

             WARNING("Setting default value for video max rate = %d. "
                     "Use NoDefaults to disable it.\n",
                     av->rc_max_rate);

         }

         if (av->rc_max_rate && !av_dict_get(recommended, "bufsize", NULL, 0)) {

             av->rc_buffer_size = av->rc_max_rate;

             av_dict_set_int(&recommended, "bufsize", av->rc_buffer_size, 0);

             WARNING("Setting default value for video buffer size = %d. "
                     "Use NoDefaults to disable it.\n",
                     av->rc_buffer_size);

         }
         break;
     default:
         abort();
     }
 

 done:

     st = av_mallocz(sizeof(AVStream));
     if (!st)
         return;

     av_dict_get_string(recommended, &enc_config, '=', ',');
     av_dict_free(&recommended);
     av_stream_set_recommended_encoder_configuration(st, enc_config);

     st->codec = av;

     stream->streams[stream->nb_streams++] = st;
 }
 

 static int ffserver_set_codec(AVCodecContext *ctx, const char *codec_name,
                               FFServerConfig *config)

 {

     int ret;
     AVCodec *codec = avcodec_find_encoder_by_name(codec_name);
     if (!codec || codec->type != ctx->codec_type) {

         report_config_error(config->filename, config->line_num, AV_LOG_ERROR,

                             &config->errors,
                             "Invalid codec name: '%s'\n", codec_name);

         return 0;
     }
     if (ctx->codec_id == AV_CODEC_ID_NONE && !ctx->priv_data) {
         if ((ret = avcodec_get_context_defaults3(ctx, codec)) < 0)
             return ret;
         ctx->codec = codec;
     }
     if (ctx->codec_id != codec->id)

         report_config_error(config->filename, config->line_num, AV_LOG_ERROR,
                             &config->errors,
                             "Inconsistent configuration: trying to set '%s' "
                             "codec option, but '%s' codec is used previously\n",

                             codec_name, avcodec_get_name(ctx->codec_id));
     return 0;

 }
 

 static int ffserver_opt_preset(const char *arg, int type, FFServerConfig *config)

 {
     FILE *f=NULL;
     char filename[1000], tmp[1000], tmp2[1000], line[1000];
     int ret = 0;

     AVCodecContext *avctx;
     const AVCodec *codec;
 
     switch(type) {
     case AV_OPT_FLAG_AUDIO_PARAM:
         avctx = config->dummy_actx;
         break;
     case AV_OPT_FLAG_VIDEO_PARAM:
         avctx = config->dummy_vctx;
         break;
     default:
         av_assert0(0);
     }
     codec = avcodec_find_encoder(avctx->codec_id);

 
     if (!(f = get_preset_file(filename, sizeof(filename), arg, 0,
                               codec ? codec->name : NULL))) {

         av_log(NULL, AV_LOG_ERROR, "File for preset '%s' not found\n", arg);

         return AVERROR(EINVAL);

     }
 
     while(!feof(f)){
         int e= fscanf(f, "%999[^\n]\n", line) - 1;
         if(line[0] == '#' && !e)
             continue;
         e|= sscanf(line, "%999[^=]=%999[^\n]\n", tmp, tmp2) - 2;
         if(e){

             av_log(NULL, AV_LOG_ERROR, "%s: Invalid syntax: '%s'\n", filename,
                    line);

             ret = AVERROR(EINVAL);

             break;
         }

         if (!strcmp(tmp, "acodec") && avctx->codec_type == AVMEDIA_TYPE_AUDIO ||
             !strcmp(tmp, "vcodec") && avctx->codec_type == AVMEDIA_TYPE_VIDEO)

         {

             if (ffserver_set_codec(avctx, tmp2, config) < 0)

                 break;
         } else if (!strcmp(tmp, "scodec")) {
             av_log(NULL, AV_LOG_ERROR, "Subtitles preset found.\n");
             ret = AVERROR(EINVAL);

             break;

         } else if (ffserver_save_avoption(tmp, tmp2, type, config) < 0)

             break;

     }
 
     fclose(f);
 
     return ret;
 }
 

 static AVOutputFormat *ffserver_guess_format(const char *short_name,
                                              const char *filename,
                                              const char *mime_type)

 {
     AVOutputFormat *fmt = av_guess_format(short_name, filename, mime_type);
 
     if (fmt) {
         AVOutputFormat *stream_fmt;
         char stream_format_name[64];
 

         snprintf(stream_format_name, sizeof(stream_format_name), "%s_stream",
                 fmt->name);

         stream_fmt = av_guess_format(stream_format_name, NULL, NULL);
 
         if (stream_fmt)
             fmt = stream_fmt;
     }
 
     return fmt;
 }
 

 static void vreport_config_error(const char *filename, int line_num,
                                  int log_level, int *errors, const char *fmt,
                                  va_list vl)

 {
     av_log(NULL, log_level, "%s:%d: ", filename, line_num);
     av_vlog(NULL, log_level, fmt, vl);

     if (errors)
         (*errors)++;

 }
 

 static void report_config_error(const char *filename, int line_num,
                                 int log_level, int *errors,
                                 const char *fmt, ...)

 {
     va_list vl;
     va_start(vl, fmt);

     vreport_config_error(filename, line_num, log_level, errors, fmt, vl);

     va_end(vl);

 }

 static int ffserver_set_int_param(int *dest, const char *value, int factor,
                                   int min, int max, FFServerConfig *config,
                                   const char *error_msg, ...)

 {
     int tmp;
     char *tailp;
     if (!value || !value[0])
         goto error;
     errno = 0;
     tmp = strtol(value, &tailp, 0);
     if (tmp < min || tmp > max)
         goto error;
     if (factor) {
         if (FFABS(tmp) > INT_MAX / FFABS(factor))
             goto error;
         tmp *= factor;
     }
     if (tailp[0] || errno)
         goto error;
     if (dest)
         *dest = tmp;
     return 0;
   error:
     if (config) {
         va_list vl;
         va_start(vl, error_msg);

         vreport_config_error(config->filename, config->line_num, AV_LOG_ERROR,

                 &config->errors, error_msg, vl);

         va_end(vl);
     }
     return AVERROR(EINVAL);
 }
 

 static int ffserver_set_float_param(float *dest, const char *value,
                                     float factor, float min, float max,
                                     FFServerConfig *config,
                                     const char *error_msg, ...)

 {
     double tmp;
     char *tailp;
     if (!value || !value[0])
         goto error;
     errno = 0;
     tmp = strtod(value, &tailp);
     if (tmp < min || tmp > max)
         goto error;
     if (factor)
         tmp *= factor;
     if (tailp[0] || errno)
         goto error;
     if (dest)
         *dest = tmp;
     return 0;
   error:
     if (config) {
         va_list vl;
         va_start(vl, error_msg);

         vreport_config_error(config->filename, config->line_num, AV_LOG_ERROR,

                 &config->errors, error_msg, vl);

         va_end(vl);
     }
     return AVERROR(EINVAL);

 }
 

 static int ffserver_save_avoption(const char *opt, const char *arg, int type,
                                   FFServerConfig *config)

 {

     static int hinted = 0;

     int ret = 0;
     AVDictionaryEntry *e;

     const AVOption *o = NULL;
     const char *option = NULL;
     const char *codec_name = NULL;
     char buff[1024];

     AVCodecContext *ctx;
     AVDictionary **dict;
     enum AVCodecID guessed_codec_id;
 
     switch (type) {
     case AV_OPT_FLAG_VIDEO_PARAM:
         ctx = config->dummy_vctx;
         dict = &config->video_opts;
         guessed_codec_id = config->guessed_video_codec_id != AV_CODEC_ID_NONE ?
                            config->guessed_video_codec_id : AV_CODEC_ID_H264;
         break;
     case AV_OPT_FLAG_AUDIO_PARAM:
         ctx = config->dummy_actx;
         dict = &config->audio_opts;
         guessed_codec_id = config->guessed_audio_codec_id != AV_CODEC_ID_NONE ?
                            config->guessed_audio_codec_id : AV_CODEC_ID_AAC;
         break;
     default:
         av_assert0(0);
     }

 
     if (strchr(opt, ':')) {
         //explicit private option
         snprintf(buff, sizeof(buff), "%s", opt);
         codec_name = buff;

         if(!(option = strchr(buff, ':'))){
             report_config_error(config->filename, config->line_num,
                                 AV_LOG_ERROR, &config->errors,
                                 "Syntax error. Unmatched ':'\n");
             return -1;
 
         }

         buff[option - buff] = '\0';
         option++;

         if ((ret = ffserver_set_codec(ctx, codec_name, config)) < 0)

             return ret;
         if (!ctx->codec || !ctx->priv_data)
             return -1;
     } else {
         option = opt;
     }
 

     o = av_opt_find(ctx, option, NULL, type | AV_OPT_FLAG_ENCODING_PARAM,
                     AV_OPT_SEARCH_CHILDREN);
     if (!o &&
         (!strcmp(option, "time_base")  || !strcmp(option, "pixel_format") ||
          !strcmp(option, "video_size") || !strcmp(option, "codec_tag")))

         o = av_opt_find(ctx, option, NULL, 0, 0);

     if (!o) {

         report_config_error(config->filename, config->line_num, AV_LOG_ERROR,

                             &config->errors, "Option not found: '%s'\n", opt);

         if (!hinted && ctx->codec_id == AV_CODEC_ID_NONE) {
             hinted = 1;

             report_config_error(config->filename, config->line_num,
                                 AV_LOG_ERROR, NULL, "If '%s' is a codec private"
                                 "option, then prefix it with codec name, for "
                                 "example '%s:%s %s' or define codec earlier.\n",
                                 opt, avcodec_get_name(guessed_codec_id) ,opt,
                                 arg);

         }
     } else if ((ret = av_opt_set(ctx, option, arg, AV_OPT_SEARCH_CHILDREN)) < 0) {

         report_config_error(config->filename, config->line_num, AV_LOG_ERROR,

                 &config->errors, "Invalid value for option %s (%s): %s\n", opt,
                 arg, av_err2str(ret));

     } else if ((e = av_dict_get(*dict, option, NULL, 0))) {

         if ((o->type == AV_OPT_TYPE_FLAGS) && arg &&
             (arg[0] == '+' || arg[0] == '-'))

             return av_dict_set(dict, option, arg, AV_DICT_APPEND);

         report_config_error(config->filename, config->line_num, AV_LOG_ERROR,

                             &config->errors, "Redeclaring value of option '%s'."
                             "Previous value was: '%s'.\n", opt, e->value);

     } else if (av_dict_set(dict, option, arg, 0) < 0) {

         return AVERROR(ENOMEM);
     }
     return 0;
 }
 

 static int ffserver_save_avoption_int(const char *opt, int64_t arg,
                                       int type, FFServerConfig *config)
 {
     char buf[22];
     snprintf(buf, sizeof(buf), "%"PRId64, arg);
     return ffserver_save_avoption(opt, buf, type, config);
 }
 

 static int ffserver_parse_config_global(FFServerConfig *config, const char *cmd,

                                         const char **p)

 {
     int val;
     char arg[1024];
     if (!av_strcasecmp(cmd, "Port") || !av_strcasecmp(cmd, "HTTPPort")) {
         if (!av_strcasecmp(cmd, "Port"))

             WARNING("Port option is deprecated. Use HTTPPort instead.\n");

         ffserver_get_arg(arg, sizeof(arg), p);

         ffserver_set_int_param(&val, arg, 0, 1, 65535, config,

                 "Invalid port: %s\n", arg);

         if (val < 1024)

             WARNING("Trying to use IETF assigned system port: '%d'\n", val);

         config->http_addr.sin_port = htons(val);

     } else if (!av_strcasecmp(cmd, "HTTPBindAddress") ||
                !av_strcasecmp(cmd, "BindAddress")) {

         if (!av_strcasecmp(cmd, "BindAddress"))

             WARNING("BindAddress option is deprecated. Use HTTPBindAddress "
                     "instead.\n");

         ffserver_get_arg(arg, sizeof(arg), p);

         if (resolve_host(&config->http_addr.sin_addr, arg))

             ERROR("Invalid host/IP address: '%s'\n", arg);

     } else if (!av_strcasecmp(cmd, "NoDaemon")) {

         WARNING("NoDaemon option has no effect. You should remove it.\n");

     } else if (!av_strcasecmp(cmd, "RTSPPort")) {
         ffserver_get_arg(arg, sizeof(arg), p);

         ffserver_set_int_param(&val, arg, 0, 1, 65535, config,

                 "Invalid port: %s\n", arg);

         config->rtsp_addr.sin_port = htons(val);

     } else if (!av_strcasecmp(cmd, "RTSPBindAddress")) {
         ffserver_get_arg(arg, sizeof(arg), p);

         if (resolve_host(&config->rtsp_addr.sin_addr, arg))

             ERROR("Invalid host/IP address: %s\n", arg);
     } else if (!av_strcasecmp(cmd, "MaxHTTPConnections")) {
         ffserver_get_arg(arg, sizeof(arg), p);

         ffserver_set_int_param(&val, arg, 0, 1, 65535, config,

                 "Invalid MaxHTTPConnections: %s\n", arg);

         config->nb_max_http_connections = val;

         if (config->nb_max_connections > config->nb_max_http_connections) {
             ERROR("Inconsistent configuration: MaxClients(%d) > "
                   "MaxHTTPConnections(%d)\n", config->nb_max_connections,
                   config->nb_max_http_connections);
         }

     } else if (!av_strcasecmp(cmd, "MaxClients")) {
         ffserver_get_arg(arg, sizeof(arg), p);

         ffserver_set_int_param(&val, arg, 0, 1, 65535, config,

                 "Invalid MaxClients: '%s'\n", arg);

         config->nb_max_connections = val;

         if (config->nb_max_connections > config->nb_max_http_connections) {
             ERROR("Inconsistent configuration: MaxClients(%d) > "
                   "MaxHTTPConnections(%d)\n", config->nb_max_connections,
                   config->nb_max_http_connections);
         }

     } else if (!av_strcasecmp(cmd, "MaxBandwidth")) {
         int64_t llval;

         char *tailp;

         ffserver_get_arg(arg, sizeof(arg), p);

         errno = 0;
         llval = strtoll(arg, &tailp, 10);
         if (llval < 10 || llval > 10000000 || tailp[0] || errno)

             ERROR("Invalid MaxBandwidth: '%s'\n", arg);

         else
             config->max_bandwidth = llval;
     } else if (!av_strcasecmp(cmd, "CustomLog")) {

         if (!config->debug) {
             ffserver_get_arg(config->logfilename, sizeof(config->logfilename),
                              p);
         }

     } else if (!av_strcasecmp(cmd, "LoadModule")) {

         ERROR("Loadable modules are no longer supported\n");

     } else if (!av_strcasecmp(cmd, "NoDefaults")) {
         config->use_defaults = 0;
     } else if (!av_strcasecmp(cmd, "UseDefaults")) {
         config->use_defaults = 1;

     } else
         ERROR("Incorrect keyword: '%s'\n", cmd);
     return 0;
 }
 
 static int ffserver_parse_config_feed(FFServerConfig *config, const char *cmd, const char **p,

                                       FFServerStream **pfeed)

 {
     FFServerStream *feed;
     char arg[1024];
     av_assert0(pfeed);
     feed = *pfeed;
     if (!av_strcasecmp(cmd, "<Feed")) {
         char *q;
         FFServerStream *s;
         feed = av_mallocz(sizeof(FFServerStream));
         if (!feed)
             return AVERROR(ENOMEM);
         ffserver_get_arg(feed->filename, sizeof(feed->filename), p);
         q = strrchr(feed->filename, '>');
         if (*q)
             *q = '\0';
 
         for (s = config->first_feed; s; s = s->next) {
             if (!strcmp(feed->filename, s->filename))
                 ERROR("Feed '%s' already registered\n", s->filename);
         }
 
         feed->fmt = av_guess_format("ffm", NULL, NULL);
         /* default feed file */
         snprintf(feed->feed_filename, sizeof(feed->feed_filename),
                  "/tmp/%s.ffm", feed->filename);
         feed->feed_max_size = 5 * 1024 * 1024;
         feed->is_feed = 1;
         feed->feed = feed; /* self feeding :-) */
         *pfeed = feed;
         return 0;
     }
     av_assert0(feed);
     if (!av_strcasecmp(cmd, "Launch")) {
         int i;
 

         feed->child_argv = av_mallocz_array(MAX_CHILD_ARGS, sizeof(char *));

         if (!feed->child_argv)
             return AVERROR(ENOMEM);

         for (i = 0; i < MAX_CHILD_ARGS - 2; i++) {

             ffserver_get_arg(arg, sizeof(arg), p);
             if (!arg[0])
                 break;
 
             feed->child_argv[i] = av_strdup(arg);
             if (!feed->child_argv[i])
                 return AVERROR(ENOMEM);
         }
 
         feed->child_argv[i] =
             av_asprintf("http://%s:%d/%s",

                         (config->http_addr.sin_addr.s_addr == INADDR_ANY) ?
                         "127.0.0.1" : inet_ntoa(config->http_addr.sin_addr),
                         ntohs(config->http_addr.sin_port), feed->filename);

         if (!feed->child_argv[i])
             return AVERROR(ENOMEM);
     } else if (!av_strcasecmp(cmd, "ACL")) {

         ffserver_parse_acl_row(NULL, feed, NULL, *p, config->filename,

                 config->line_num);

     } else if (!av_strcasecmp(cmd, "File") ||
                !av_strcasecmp(cmd, "ReadOnlyFile")) {

         ffserver_get_arg(feed->feed_filename, sizeof(feed->feed_filename), p);
         feed->readonly = !av_strcasecmp(cmd, "ReadOnlyFile");
     } else if (!av_strcasecmp(cmd, "Truncate")) {
         ffserver_get_arg(arg, sizeof(arg), p);
         /* assume Truncate is true in case no argument is specified */
         if (!arg[0]) {
             feed->truncate = 1;
         } else {

             WARNING("Truncate N syntax in configuration file is deprecated. "
                     "Use Truncate alone with no arguments.\n");

             feed->truncate = strtod(arg, NULL);
         }
     } else if (!av_strcasecmp(cmd, "FileMaxSize")) {
         char *p1;
         double fsize;
 
         ffserver_get_arg(arg, sizeof(arg), p);
         p1 = arg;
         fsize = strtod(p1, &p1);
         switch(av_toupper(*p1)) {
         case 'K':
             fsize *= 1024;
             break;
         case 'M':
             fsize *= 1024 * 1024;
             break;
         case 'G':
             fsize *= 1024 * 1024 * 1024;
             break;

         default:

             ERROR("Invalid file size: '%s'\n", arg);

             break;

         }
         feed->feed_max_size = (int64_t)fsize;

         if (feed->feed_max_size < FFM_PACKET_SIZE*4) {

             ERROR("Feed max file size is too small. Must be at least %d.\n",

                   FFM_PACKET_SIZE*4);
         }

     } else if (!av_strcasecmp(cmd, "</Feed>")) {
         *pfeed = NULL;
     } else {
         ERROR("Invalid entry '%s' inside <Feed></Feed>\n", cmd);
     }
     return 0;
 }
 
 static int ffserver_parse_config_stream(FFServerConfig *config, const char *cmd, const char **p,

                                         FFServerStream **pstream)

 {
     char arg[1024], arg2[1024];
     FFServerStream *stream;

     int val;

 
     av_assert0(pstream);
     stream = *pstream;
 
     if (!av_strcasecmp(cmd, "<Stream")) {
         char *q;
         FFServerStream *s;
         stream = av_mallocz(sizeof(FFServerStream));
         if (!stream)
             return AVERROR(ENOMEM);

         config->dummy_actx = avcodec_alloc_context3(NULL);
         config->dummy_vctx = avcodec_alloc_context3(NULL);
         if (!config->dummy_vctx || !config->dummy_actx) {

             av_free(stream);

             avcodec_free_context(&config->dummy_vctx);
             avcodec_free_context(&config->dummy_actx);

             return AVERROR(ENOMEM);
         }

         config->dummy_actx->codec_type = AVMEDIA_TYPE_AUDIO;
         config->dummy_vctx->codec_type = AVMEDIA_TYPE_VIDEO;

         ffserver_get_arg(stream->filename, sizeof(stream->filename), p);
         q = strrchr(stream->filename, '>');
         if (q)
             *q = '\0';
 
         for (s = config->first_stream; s; s = s->next) {
             if (!strcmp(stream->filename, s->filename))
                 ERROR("Stream '%s' already registered\n", s->filename);
         }
 
         stream->fmt = ffserver_guess_format(NULL, stream->filename, NULL);
         if (stream->fmt) {

             config->guessed_audio_codec_id = stream->fmt->audio_codec;
             config->guessed_video_codec_id = stream->fmt->video_codec;

         } else {

             config->guessed_audio_codec_id = AV_CODEC_ID_NONE;
             config->guessed_video_codec_id = AV_CODEC_ID_NONE;

         }

         config->stream_use_defaults = config->use_defaults;

         *pstream = stream;
         return 0;
     }
     av_assert0(stream);
     if (!av_strcasecmp(cmd, "Feed")) {
         FFServerStream *sfeed;
         ffserver_get_arg(arg, sizeof(arg), p);
         sfeed = config->first_feed;
         while (sfeed) {
             if (!strcmp(sfeed->filename, arg))
                 break;
             sfeed = sfeed->next_feed;
         }
         if (!sfeed)

             ERROR("Feed with name '%s' for stream '%s' is not defined\n", arg,
                     stream->filename);

         else
             stream->feed = sfeed;
     } else if (!av_strcasecmp(cmd, "Format")) {
         ffserver_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 MJPEG */

             if (!strcmp(arg, "jpeg")) {
                 strcpy(arg, "singlejpeg");
                 stream->single_frame=1;
             }

             stream->fmt = ffserver_guess_format(arg, NULL, NULL);
             if (!stream->fmt)

                 ERROR("Unknown Format: '%s'\n", arg);

         }
         if (stream->fmt) {

             config->guessed_audio_codec_id = stream->fmt->audio_codec;
             config->guessed_video_codec_id = stream->fmt->video_codec;

         }
     } else if (!av_strcasecmp(cmd, "InputFormat")) {
         ffserver_get_arg(arg, sizeof(arg), p);
         stream->ifmt = av_find_input_format(arg);
         if (!stream->ifmt)

             ERROR("Unknown input format: '%s'\n", arg);

     } else if (!av_strcasecmp(cmd, "FaviconURL")) {
         if (stream->stream_type == STREAM_TYPE_STATUS)

             ffserver_get_arg(stream->feed_filename,
                     sizeof(stream->feed_filename), p);

         else
             ERROR("FaviconURL only permitted for status streams\n");
     } else if (!av_strcasecmp(cmd, "Author")    ||
                !av_strcasecmp(cmd, "Comment")   ||
                !av_strcasecmp(cmd, "Copyright") ||
                !av_strcasecmp(cmd, "Title")) {
         char key[32];

         int i;

         ffserver_get_arg(arg, sizeof(arg), p);
         for (i = 0; i < strlen(cmd); i++)
             key[i] = av_tolower(cmd[i]);
         key[i] = 0;

         WARNING("Deprecated '%s' option in configuration file. Use "
                 "'Metadata %s VALUE' instead.\n", cmd, key);

         if (av_dict_set(&stream->metadata, key, arg, 0) < 0)
             goto nomem;

     } else if (!av_strcasecmp(cmd, "Metadata")) {
         ffserver_get_arg(arg, sizeof(arg), p);
         ffserver_get_arg(arg2, sizeof(arg2), p);

         if (av_dict_set(&stream->metadata, arg, arg2, 0) < 0)
             goto nomem;

     } else if (!av_strcasecmp(cmd, "Preroll")) {
         ffserver_get_arg(arg, sizeof(arg), p);
         stream->prebuffer = atof(arg) * 1000;
     } else if (!av_strcasecmp(cmd, "StartSendOnKey")) {
         stream->send_on_key = 1;
     } else if (!av_strcasecmp(cmd, "AudioCodec")) {
         ffserver_get_arg(arg, sizeof(arg), p);

         ffserver_set_codec(config->dummy_actx, arg, config);

     } else if (!av_strcasecmp(cmd, "VideoCodec")) {
         ffserver_get_arg(arg, sizeof(arg), p);

         ffserver_set_codec(config->dummy_vctx, arg, config);

     } else if (!av_strcasecmp(cmd, "MaxTime")) {
         ffserver_get_arg(arg, sizeof(arg), p);
         stream->max_time = atof(arg) * 1000;
     } else if (!av_strcasecmp(cmd, "AudioBitRate")) {

         float f;

         ffserver_get_arg(arg, sizeof(arg), p);

         ffserver_set_float_param(&f, arg, 1000, -FLT_MAX, FLT_MAX, config,

                 "Invalid %s: '%s'\n", cmd, arg);

         if (ffserver_save_avoption_int("b", (int64_t)lrintf(f),

                                        AV_OPT_FLAG_AUDIO_PARAM, config) < 0)

             goto nomem;

     } else if (!av_strcasecmp(cmd, "AudioChannels")) {
         ffserver_get_arg(arg, sizeof(arg), p);

         if (ffserver_save_avoption("ac", arg, AV_OPT_FLAG_AUDIO_PARAM, config) < 0)

             goto nomem;

     } else if (!av_strcasecmp(cmd, "AudioSampleRate")) {
         ffserver_get_arg(arg, sizeof(arg), p);

         if (ffserver_save_avoption("ar", arg, AV_OPT_FLAG_AUDIO_PARAM, config) < 0)

             goto nomem;

     } else if (!av_strcasecmp(cmd, "VideoBitRateRange")) {
         int minrate, maxrate;

         char *dash;

         ffserver_get_arg(arg, sizeof(arg), p);

         dash = strchr(arg, '-');
         if (dash) {
             *dash = '\0';
             dash++;

             if (ffserver_set_int_param(&minrate, arg,  1000, 0, INT_MAX, config, "Invalid %s: '%s'", cmd, arg) >= 0 &&
                 ffserver_set_int_param(&maxrate, dash, 1000, 0, INT_MAX, config, "Invalid %s: '%s'", cmd, arg) >= 0) {

                 if (ffserver_save_avoption_int("minrate", minrate, AV_OPT_FLAG_VIDEO_PARAM, config) < 0 ||
                     ffserver_save_avoption_int("maxrate", maxrate, AV_OPT_FLAG_VIDEO_PARAM, config) < 0)

                 goto nomem;

             }

         } else

             ERROR("Incorrect format for VideoBitRateRange. It should be "

                   "<min>-<max>: '%s'.\n", arg);

     } else if (!av_strcasecmp(cmd, "Debug")) {
         ffserver_get_arg(arg, sizeof(arg), p);

         if (ffserver_save_avoption("debug", arg, AV_OPT_FLAG_AUDIO_PARAM, config) < 0 ||
             ffserver_save_avoption("debug", arg, AV_OPT_FLAG_VIDEO_PARAM, config) < 0)

             goto nomem;

     } else if (!av_strcasecmp(cmd, "Strict")) {
         ffserver_get_arg(arg, sizeof(arg), p);

         if (ffserver_save_avoption("strict", arg, AV_OPT_FLAG_AUDIO_PARAM, config) < 0 ||
             ffserver_save_avoption("strict", arg, AV_OPT_FLAG_VIDEO_PARAM, config) < 0)

             goto nomem;

     } else if (!av_strcasecmp(cmd, "VideoBufferSize")) {
         ffserver_get_arg(arg, sizeof(arg), p);

         ffserver_set_int_param(&val, arg, 8*1024, 0, INT_MAX, config,

                 "Invalid %s: '%s'", cmd, arg);

         if (ffserver_save_avoption_int("bufsize", val, AV_OPT_FLAG_VIDEO_PARAM, config) < 0)

             goto nomem;

     } else if (!av_strcasecmp(cmd, "VideoBitRateTolerance")) {
         ffserver_get_arg(arg, sizeof(arg), p);

         ffserver_set_int_param(&val, arg, 1000, INT_MIN, INT_MAX, config,

                                "Invalid %s: '%s'", cmd, arg);

         if (ffserver_save_avoption_int("bt", val, AV_OPT_FLAG_VIDEO_PARAM, config) < 0)

             goto nomem;

     } else if (!av_strcasecmp(cmd, "VideoBitRate")) {
         ffserver_get_arg(arg, sizeof(arg), p);

         ffserver_set_int_param(&val, arg, 1000, INT_MIN, INT_MAX, config,

                                "Invalid %s: '%s'", cmd, arg);

         if (ffserver_save_avoption_int("b", val, AV_OPT_FLAG_VIDEO_PARAM, config) < 0)

            goto nomem;

     } else if (!av_strcasecmp(cmd, "VideoSize")) {

         int ret, w, h;

         ffserver_get_arg(arg, sizeof(arg), p);

         ret = av_parse_video_size(&w, &h, arg);

         if (ret < 0)
             ERROR("Invalid video size '%s'\n", arg);

         else {
             if (w % 2 || h % 2)
                 WARNING("Image size is not a multiple of 2\n");
             if (ffserver_save_avoption("video_size", arg, AV_OPT_FLAG_VIDEO_PARAM, config) < 0)

                 goto nomem;

         }

     } else if (!av_strcasecmp(cmd, "VideoFrameRate")) {
         ffserver_get_arg(&arg[2], sizeof(arg) - 2, p);
         arg[0] = '1'; arg[1] = '/';
         if (ffserver_save_avoption("time_base", arg, AV_OPT_FLAG_VIDEO_PARAM, config) < 0)
             goto nomem;

     } else if (!av_strcasecmp(cmd, "PixelFormat")) {

         enum AVPixelFormat pix_fmt;

         ffserver_get_arg(arg, sizeof(arg), p);

         pix_fmt = av_get_pix_fmt(arg);
         if (pix_fmt == AV_PIX_FMT_NONE)

             ERROR("Unknown pixel format: '%s'\n", arg);

         else if (ffserver_save_avoption("pixel_format", arg, AV_OPT_FLAG_VIDEO_PARAM, config) < 0)

             goto nomem;

     } else if (!av_strcasecmp(cmd, "VideoGopSize")) {
         ffserver_get_arg(arg, sizeof(arg), p);

         if (ffserver_save_avoption("g", arg, AV_OPT_FLAG_VIDEO_PARAM, config) < 0)

             goto nomem;

     } else if (!av_strcasecmp(cmd, "VideoIntraOnly")) {

         if (ffserver_save_avoption("g", "1", AV_OPT_FLAG_VIDEO_PARAM, config) < 0)

             goto nomem;

     } else if (!av_strcasecmp(cmd, "VideoHighQuality")) {

         if (ffserver_save_avoption("mbd", "+bits", AV_OPT_FLAG_VIDEO_PARAM, config) < 0)

             goto nomem;

     } else if (!av_strcasecmp(cmd, "Video4MotionVector")) {

         if (ffserver_save_avoption("mbd", "+bits",  AV_OPT_FLAG_VIDEO_PARAM, config) < 0 || //FIXME remove
             ffserver_save_avoption("flags", "+mv4", AV_OPT_FLAG_VIDEO_PARAM, config) < 0)

             goto nomem;

     } else if (!av_strcasecmp(cmd, "AVOptionVideo") ||
                !av_strcasecmp(cmd, "AVOptionAudio")) {

         int ret;

         ffserver_get_arg(arg, sizeof(arg), p);
         ffserver_get_arg(arg2, sizeof(arg2), p);

         if (!av_strcasecmp(cmd, "AVOptionVideo"))

             ret = ffserver_save_avoption(arg, arg2, AV_OPT_FLAG_VIDEO_PARAM,
                                          config);

         else

             ret = ffserver_save_avoption(arg, arg2, AV_OPT_FLAG_AUDIO_PARAM,
                                          config);

         if (ret < 0)

             goto nomem;

     } else if (!av_strcasecmp(cmd, "AVPresetVideo") ||
                !av_strcasecmp(cmd, "AVPresetAudio")) {
         ffserver_get_arg(arg, sizeof(arg), p);

         if (!av_strcasecmp(cmd, "AVPresetVideo"))

             ffserver_opt_preset(arg, AV_OPT_FLAG_VIDEO_PARAM, config);

         else

             ffserver_opt_preset(arg, AV_OPT_FLAG_AUDIO_PARAM, config);

     } else if (!av_strcasecmp(cmd, "VideoTag")) {
         ffserver_get_arg(arg, sizeof(arg), p);

         if (strlen(arg) == 4 &&

             ffserver_save_avoption_int("codec_tag",
                                        MKTAG(arg[0], arg[1], arg[2], arg[3]),

                                        AV_OPT_FLAG_VIDEO_PARAM, config) < 0)
             goto nomem;

     } else if (!av_strcasecmp(cmd, "BitExact")) {

         if (ffserver_save_avoption("flags", "+bitexact", AV_OPT_FLAG_VIDEO_PARAM, config) < 0)

             goto nomem;

     } else if (!av_strcasecmp(cmd, "DctFastint")) {

         if (ffserver_save_avoption("dct", "fastint", AV_OPT_FLAG_VIDEO_PARAM, config) < 0)

             goto nomem;

     } else if (!av_strcasecmp(cmd, "IdctSimple")) {

         if (ffserver_save_avoption("idct", "simple", AV_OPT_FLAG_VIDEO_PARAM, config) < 0)

             goto nomem;

     } else if (!av_strcasecmp(cmd, "Qscale")) {
         ffserver_get_arg(arg, sizeof(arg), p);

         ffserver_set_int_param(&val, arg, 0, INT_MIN, INT_MAX, config,

                                "Invalid Qscale: '%s'\n", arg);

         if (ffserver_save_avoption("flags", "+qscale", AV_OPT_FLAG_VIDEO_PARAM, config) < 0 ||
             ffserver_save_avoption_int("global_quality", FF_QP2LAMBDA * val,
                                        AV_OPT_FLAG_VIDEO_PARAM, config) < 0)

             goto nomem;

     } else if (!av_strcasecmp(cmd, "VideoQDiff")) {
         ffserver_get_arg(arg, sizeof(arg), p);

         if (ffserver_save_avoption("qdiff", arg, AV_OPT_FLAG_VIDEO_PARAM, config) < 0)

             goto nomem;

     } else if (!av_strcasecmp(cmd, "VideoQMax")) {
         ffserver_get_arg(arg, sizeof(arg), p);

         if (ffserver_save_avoption("qmax", arg, AV_OPT_FLAG_VIDEO_PARAM, config) < 0)

             goto nomem;

     } else if (!av_strcasecmp(cmd, "VideoQMin")) {
         ffserver_get_arg(arg, sizeof(arg), p);

         if (ffserver_save_avoption("qmin", arg, AV_OPT_FLAG_VIDEO_PARAM, config) < 0)

             goto nomem;

     } else if (!av_strcasecmp(cmd, "LumiMask")) {
         ffserver_get_arg(arg, sizeof(arg), p);

         if (ffserver_save_avoption("lumi_mask", arg, AV_OPT_FLAG_VIDEO_PARAM, config) < 0)

             goto nomem;

     } else if (!av_strcasecmp(cmd, "DarkMask")) {
         ffserver_get_arg(arg, sizeof(arg), p);

         if (ffserver_save_avoption("dark_mask", arg, AV_OPT_FLAG_VIDEO_PARAM, config) < 0)

             goto nomem;

     } else if (!av_strcasecmp(cmd, "NoVideo")) {

         config->no_video = 1;

     } else if (!av_strcasecmp(cmd, "NoAudio")) {

         config->no_audio = 1;

     } else if (!av_strcasecmp(cmd, "ACL")) {

         ffserver_parse_acl_row(stream, NULL, NULL, *p, config->filename,

                 config->line_num);

     } else if (!av_strcasecmp(cmd, "DynamicACL")) {
         ffserver_get_arg(stream->dynamic_acl, sizeof(stream->dynamic_acl), p);
     } else if (!av_strcasecmp(cmd, "RTSPOption")) {
         ffserver_get_arg(arg, sizeof(arg), p);
         av_freep(&stream->rtsp_option);
         stream->rtsp_option = av_strdup(arg);
     } else if (!av_strcasecmp(cmd, "MulticastAddress")) {
         ffserver_get_arg(arg, sizeof(arg), p);

         if (resolve_host(&stream->multicast_ip, arg))

             ERROR("Invalid host/IP address: '%s'\n", arg);

         stream->is_multicast = 1;
         stream->loop = 1; /* default is looping */
     } else if (!av_strcasecmp(cmd, "MulticastPort")) {
         ffserver_get_arg(arg, sizeof(arg), p);

         ffserver_set_int_param(&val, arg, 0, 1, 65535, config,

                 "Invalid MulticastPort: '%s'\n", arg);

         stream->multicast_port = val;

     } else if (!av_strcasecmp(cmd, "MulticastTTL")) {
         ffserver_get_arg(arg, sizeof(arg), p);

         ffserver_set_int_param(&val, arg, 0, INT_MIN, INT_MAX, config,

                 "Invalid MulticastTTL: '%s'\n", arg);

         stream->multicast_ttl = val;

     } else if (!av_strcasecmp(cmd, "NoLoop")) {
         stream->loop = 0;
     } else if (!av_strcasecmp(cmd, "</Stream>")) {

         config->stream_use_defaults &= 1;

         if (stream->feed && stream->fmt && strcmp(stream->fmt->name, "ffm")) {

             if (config->dummy_actx->codec_id == AV_CODEC_ID_NONE)
                 config->dummy_actx->codec_id = config->guessed_audio_codec_id;

             if (!config->no_audio &&
                 config->dummy_actx->codec_id != AV_CODEC_ID_NONE) {

                 AVCodecContext *audio_enc = avcodec_alloc_context3(avcodec_find_encoder(config->dummy_actx->codec_id));

                 add_codec(stream, audio_enc, config);

             }

             if (config->dummy_vctx->codec_id == AV_CODEC_ID_NONE)
                 config->dummy_vctx->codec_id = config->guessed_video_codec_id;

             if (!config->no_video &&
                 config->dummy_vctx->codec_id != AV_CODEC_ID_NONE) {

                 AVCodecContext *video_enc = avcodec_alloc_context3(avcodec_find_encoder(config->dummy_vctx->codec_id));

                 add_codec(stream, video_enc, config);

             }
         }

         av_dict_free(&config->video_opts);
         av_dict_free(&config->audio_opts);

         avcodec_free_context(&config->dummy_vctx);
         avcodec_free_context(&config->dummy_actx);

         *pstream = NULL;

     } else if (!av_strcasecmp(cmd, "File") ||
                !av_strcasecmp(cmd, "ReadOnlyFile")) {

         ffserver_get_arg(stream->feed_filename, sizeof(stream->feed_filename),
                 p);

     } else if (!av_strcasecmp(cmd, "UseDefaults")) {
         if (config->stream_use_defaults > 1)
             WARNING("Multiple UseDefaults/NoDefaults entries.\n");
         config->stream_use_defaults = 3;
     } else if (!av_strcasecmp(cmd, "NoDefaults")) {
         if (config->stream_use_defaults > 1)
             WARNING("Multiple UseDefaults/NoDefaults entries.\n");
         config->stream_use_defaults = 2;

     } else {
         ERROR("Invalid entry '%s' inside <Stream></Stream>\n", cmd);
     }
     return 0;

   nomem:
     av_log(NULL, AV_LOG_ERROR, "Out of memory. Aborting.\n");
     av_dict_free(&config->video_opts);
     av_dict_free(&config->audio_opts);

     avcodec_free_context(&config->dummy_vctx);
     avcodec_free_context(&config->dummy_actx);

     return AVERROR(ENOMEM);

 }
 

 static int ffserver_parse_config_redirect(FFServerConfig *config,
                                           const char *cmd, const char **p,

                                           FFServerStream **predirect)

 {
     FFServerStream *redirect;
     av_assert0(predirect);
     redirect = *predirect;
 
     if (!av_strcasecmp(cmd, "<Redirect")) {
         char *q;
         redirect = av_mallocz(sizeof(FFServerStream));
         if (!redirect)
             return AVERROR(ENOMEM);
 
         ffserver_get_arg(redirect->filename, sizeof(redirect->filename), p);
         q = strrchr(redirect->filename, '>');
         if (*q)
             *q = '\0';
         redirect->stream_type = STREAM_TYPE_REDIRECT;
         *predirect = redirect;
         return 0;
     }
     av_assert0(redirect);
     if (!av_strcasecmp(cmd, "URL")) {

         ffserver_get_arg(redirect->feed_filename,
                 sizeof(redirect->feed_filename), p);

     } else if (!av_strcasecmp(cmd, "</Redirect>")) {
         if (!redirect->feed_filename[0])
             ERROR("No URL found for <Redirect>\n");
         *predirect = NULL;
     } else {
         ERROR("Invalid entry '%s' inside <Redirect></Redirect>\n", cmd);
     }
     return 0;
 }
 

 int ffserver_parse_ffconfig(const char *filename, FFServerConfig *config)
 {
     FILE *f;
     char line[1024];
     char cmd[64];
     const char *p;

     FFServerStream **last_stream, *stream = NULL, *redirect = NULL;
     FFServerStream **last_feed, *feed = NULL;

     int ret = 0;
 
     av_assert0(config);
 
     f = fopen(filename, "r");
     if (!f) {
         ret = AVERROR(errno);

         av_log(NULL, AV_LOG_ERROR,
                 "Could not open the configuration file '%s'\n", filename);

         return ret;
     }
 
     config->first_stream = NULL;
     config->first_feed = NULL;

     config->errors = config->warnings = 0;

     last_stream = &config->first_stream;
     last_feed = &config->first_feed;
 
     config->line_num = 0;
     while (fgets(line, sizeof(line), f) != NULL) {

         config->line_num++;

         p = line;
         while (av_isspace(*p))
             p++;
         if (*p == '\0' || *p == '#')
             continue;
 
         ffserver_get_arg(cmd, sizeof(cmd), &p);
 

         if (feed || !av_strcasecmp(cmd, "<Feed")) {
             int opening = !av_strcasecmp(cmd, "<Feed");
             if (opening && (stream || feed || redirect)) {

                 ERROR("Already in a tag\n");
             } else {

                 ret = ffserver_parse_config_feed(config, cmd, &p, &feed);
                 if (ret < 0)

                     break;

                 if (opening) {

                     /* add in stream & feed list */

                     *last_stream = feed;
                     *last_feed = feed;

                     last_stream = &feed->next;

                     last_feed = &feed->next_feed;

                 }
             }

         } else if (stream || !av_strcasecmp(cmd, "<Stream")) {
             int opening = !av_strcasecmp(cmd, "<Stream");
             if (opening && (stream || feed || redirect)) {

                 ERROR("Already in a tag\n");
             } else {

                 ret = ffserver_parse_config_stream(config, cmd, &p, &stream);
                 if (ret < 0)

                     break;
                 if (opening) {
                     /* add in stream list */
                     *last_stream = stream;
                     last_stream = &stream->next;

                 }
             }

         } else if (redirect || !av_strcasecmp(cmd, "<Redirect")) {
             int opening = !av_strcasecmp(cmd, "<Redirect");
             if (opening && (stream || feed || redirect))

                 ERROR("Already in a tag\n");

             else {

                 ret = ffserver_parse_config_redirect(config, cmd, &p,
                                                      &redirect);
                 if (ret < 0)

                     break;
                 if (opening) {
                     /* add in stream list */
                     *last_stream = redirect;
                     last_stream = &redirect->next;

                 }
             }
         } else {

             ffserver_parse_config_global(config, cmd, &p);

         }
     }

     if (stream || feed || redirect)

         ERROR("Missing closing </%s> tag\n",
               stream ? "Stream" : (feed ? "Feed" : "Redirect"));

 
     fclose(f);
     if (ret < 0)
         return ret;

     if (config->errors)

         return AVERROR(EINVAL);
     else
         return 0;
 }

 
 #undef ERROR
 #undef WARNING

 
 void ffserver_free_child_args(void *argsp)
 {
     int i;
     char **args;
     if (!argsp)
         return;
     args = *(char ***)argsp;
     if (!args)
         return;
     for (i = 0; i < MAX_CHILD_ARGS; i++)
         av_free(args[i]);
     av_freep(argsp);
 }