ffserver.c

        if (find_info_tag(buf, sizeof(buf), "date", info)) {
            stream_pos = parse_date(buf, 1);
        } else {
            stream_pos = 0;
        }
    }
    if (input_filename[0] == '\0')
        return -1;

    /* open stream */
    if (av_open_input_file(&s, input_filename, NULL, buf_size, NULL) < 0)
        return -1;
    c->fmt_in = s;

    if (c->fmt_in->iformat->read_seek) {
        c->fmt_in->iformat->read_seek(c->fmt_in, stream_pos);
    }
    
    //    printf("stream %s opened pos=%0.6f\n", input_filename, stream_pos / 1000000.0);
    return 0;
}

static int http_prepare_data(HTTPContext *c)
{
    int i;

    switch(c->state) {
    case HTTPSTATE_SEND_DATA_HEADER:
        memset(&c->fmt_ctx, 0, sizeof(c->fmt_ctx));
        if (c->stream->feed) {
            /* open output stream by using specified codecs */
            c->fmt_ctx.oformat = c->stream->fmt;
            c->fmt_ctx.nb_streams = c->stream->nb_streams;
            for(i=0;i<c->fmt_ctx.nb_streams;i++) {
                AVStream *st;
                st = av_mallocz(sizeof(AVStream));
                c->fmt_ctx.streams[i] = st;
                if (c->stream->feed == c->stream)
                    memcpy(st, c->stream->streams[i], sizeof(AVStream));
                else
                    memcpy(st, c->stream->feed->streams[c->stream->feed_streams[i]], sizeof(AVStream));

                st->codec.frame_number = 0; /* XXX: should be done in
                                               AVStream, not in codec */
            }
            c->got_key_frame = 0;
        } else {
            /* open output stream by using codecs in specified file */
            c->fmt_ctx.oformat = c->stream->fmt;
            c->fmt_ctx.nb_streams = c->fmt_in->nb_streams;
            for(i=0;i<c->fmt_ctx.nb_streams;i++) {
                AVStream *st;
                st = av_mallocz(sizeof(AVStream));
                c->fmt_ctx.streams[i] = st;
                memcpy(st, c->fmt_in->streams[i], sizeof(AVStream));
                st->codec.frame_number = 0; /* XXX: should be done in
                                               AVStream, not in codec */
            }
            c->got_key_frame = 0;
        }
        init_put_byte(&c->fmt_ctx.pb, c->pbuffer, PACKET_MAX_SIZE,
                      1, c, NULL, http_write_packet, NULL);
        c->fmt_ctx.pb.is_streamed = 1;
        /* prepare header */
        av_write_header(&c->fmt_ctx);
        c->state = HTTPSTATE_SEND_DATA;
        c->last_packet_sent = 0;
        break;
    case HTTPSTATE_SEND_DATA:
        /* find a new packet */
#if 0
        fifo_total_size = http_fifo_write_count - c->last_http_fifo_write_count;
        if (fifo_total_size >= ((3 * FIFO_MAX_SIZE) / 4)) {
            /* overflow : resync. We suppose that wptr is at this
               point a pointer to a valid packet */
            c->rptr = http_fifo.wptr;
            c->got_key_frame = 0;
        }
        
        start_rptr = c->rptr;
        if (fifo_read(&http_fifo, (UINT8 *)&hdr, sizeof(hdr), &c->rptr) < 0)
            return 0;
        payload_size = ntohs(hdr.payload_size);
        payload = av_malloc(payload_size);
        if (fifo_read(&http_fifo, payload, payload_size, &c->rptr) < 0) {
            /* cannot read all the payload */
            av_free(payload);
            c->rptr = start_rptr;
            return 0;
        }
        
        c->last_http_fifo_write_count = http_fifo_write_count - 
            fifo_size(&http_fifo, c->rptr);
        
        if (c->stream->stream_type != STREAM_TYPE_MASTER) {
            /* test if the packet can be handled by this format */
            ret = 0;
            for(i=0;i<c->fmt_ctx.nb_streams;i++) {
                AVStream *st = c->fmt_ctx.streams[i];
                if (test_header(&hdr, &st->codec)) {
                    /* only begin sending when got a key frame */
                    if (st->codec.key_frame)
                        c->got_key_frame |= 1 << i;
                    if (c->got_key_frame & (1 << i)) {
                        ret = c->fmt_ctx.format->write_packet(&c->fmt_ctx, i,
                                                                   payload, payload_size);
                    }
                    break;
                }
            }
            if (ret) {
                /* must send trailer now */
                c->state = HTTPSTATE_SEND_DATA_TRAILER;
            }
        } else {
            /* master case : send everything */
            char *q;
            q = c->buffer;
            memcpy(q, &hdr, sizeof(hdr));
            q += sizeof(hdr);
            memcpy(q, payload, payload_size);
            q += payload_size;
            c->buffer_ptr = c->buffer;
            c->buffer_end = q;
        }
        av_free(payload);
#endif
        {
            AVPacket pkt;

            /* read a packet from the input stream */
            if (c->stream->feed) {
                ffm_set_write_index(c->fmt_in, 
                                    c->stream->feed->feed_write_index,
                                    c->stream->feed->feed_size);
            }

            if (c->stream->max_time && 
                c->stream->max_time + c->start_time > time(0)) {
                /* We have timed out */
                c->state = HTTPSTATE_SEND_DATA_TRAILER;
            } else if (av_read_packet(c->fmt_in, &pkt) < 0) {
                if (c->stream->feed && c->stream->feed->feed_opened) {
                    /* if coming from feed, it means we reached the end of the
                       ffm file, so must wait for more data */
                    c->state = HTTPSTATE_WAIT_FEED;
                    return 1; /* state changed */
                } else {
                    /* must send trailer now because eof or error */
                    c->state = HTTPSTATE_SEND_DATA_TRAILER;
                }
            } else {
                /* send it to the appropriate stream */
                if (c->stream->feed) {
                    /* if coming from a feed, select the right stream */
                    for(i=0;i<c->stream->nb_streams;i++) {
                        if (c->stream->feed_streams[i] == pkt.stream_index) {
                            pkt.stream_index = i;
                            if (pkt.flags & PKT_FLAG_KEY) {
                                c->got_key_frame |= 1 << i;
                            }
                            /* See if we have all the key frames, then 
                             * we start to send. This logic is not quite
                             * right, but it works for the case of a 
                             * single video stream with one or more
                             * audio streams (for which every frame is 
                             * typically a key frame). 
                             */
                            if (!c->stream->send_on_key || ((c->got_key_frame + 1) >> c->stream->nb_streams)) {
                                goto send_it;
                            }
                        }
                    }
                } else {
                    AVCodecContext *codec;
                send_it:
                    /* Fudge here */
                    codec = &c->fmt_ctx.streams[pkt.stream_index]->codec;

                    codec->key_frame = ((pkt.flags & PKT_FLAG_KEY) != 0);

#ifdef PJSG
                    if (codec->codec_type == CODEC_TYPE_AUDIO) {
                        codec->frame_size = (codec->sample_rate * pkt.duration + 500000) / 1000000;
                        /* printf("Calculated size %d, from sr %d, duration %d\n", codec->frame_size, codec->sample_rate, pkt.duration); */
                    }
#endif

                    if (av_write_packet(&c->fmt_ctx, &pkt, 0))
                        c->state = HTTPSTATE_SEND_DATA_TRAILER;

                    codec->frame_number++;
                }

                av_free_packet(&pkt);
            }
        }
        break;
    default:
    case HTTPSTATE_SEND_DATA_TRAILER:
        /* last packet test ? */
        if (c->last_packet_sent)
            return -1;
        /* prepare header */
        av_write_trailer(&c->fmt_ctx);
        c->last_packet_sent = 1;
        break;
    }
    return 0;
}

/* should convert the format at the same time */
static int http_send_data(HTTPContext *c)
{
    int len, ret;

    while (c->buffer_ptr >= c->buffer_end) {
        ret = http_prepare_data(c);
        if (ret < 0)
            return -1;
        else if (ret == 0) {
            continue;
        } else {
            /* state change requested */
            return 0;
        }
    }

    if (c->buffer_end > c->buffer_ptr) {
        len = write(c->fd, c->buffer_ptr, c->buffer_end - c->buffer_ptr);
        if (len < 0) {
            if (errno != EAGAIN && errno != EINTR) {
                /* error : close connection */
                return -1;
            }
        } else {
            c->buffer_ptr += len;
            c->data_count += len;
            if (c->stream)
                c->stream->bytes_served += len;
        }
    }
    return 0;
}

static int http_start_receive_data(HTTPContext *c)
{
    int fd;

    if (c->stream->feed_opened)
        return -1;

    /* open feed */
    fd = open(c->stream->feed_filename, O_RDWR);
    if (fd < 0)
        return -1;
    c->feed_fd = fd;
    
    c->stream->feed_write_index = ffm_read_write_index(fd);
    c->stream->feed_size = lseek(fd, 0, SEEK_END);
    lseek(fd, 0, SEEK_SET);

    /* init buffer input */
    c->buffer_ptr = c->buffer;
    c->buffer_end = c->buffer + FFM_PACKET_SIZE;
    c->stream->feed_opened = 1;
    return 0;
}
    
static int http_receive_data(HTTPContext *c)
{
    HTTPContext *c1;

    if (c->buffer_end > c->buffer_ptr) {
        int len;

        len = read(c->fd, c->buffer_ptr, c->buffer_end - c->buffer_ptr);
        if (len < 0) {
            if (errno != EAGAIN && errno != EINTR) {
                /* error : close connection */
                goto fail;
            }
        } else if (len == 0) {
            /* end of connection : close it */
            goto fail;
        } else {
            c->buffer_ptr += len;
            c->data_count += len;
        }
    }

    if (c->buffer_ptr >= c->buffer_end) {
        FFStream *feed = c->stream;
        /* a packet has been received : write it in the store, except
           if header */
        if (c->data_count > FFM_PACKET_SIZE) {
            
            //            printf("writing pos=0x%Lx size=0x%Lx\n", feed->feed_write_index, feed->feed_size);
            /* XXX: use llseek or url_seek */
            lseek(c->feed_fd, feed->feed_write_index, SEEK_SET);
            write(c->feed_fd, c->buffer, FFM_PACKET_SIZE);
            
            feed->feed_write_index += FFM_PACKET_SIZE;
            /* update file size */
            if (feed->feed_write_index > c->stream->feed_size)
                feed->feed_size = feed->feed_write_index;

            /* handle wrap around if max file size reached */
            if (feed->feed_write_index >= c->stream->feed_max_size)
                feed->feed_write_index = FFM_PACKET_SIZE;

            /* write index */
            ffm_write_write_index(c->feed_fd, feed->feed_write_index);

            /* wake up any waiting connections */
            for(c1 = first_http_ctx; c1 != NULL; c1 = c1->next) {
                if (c1->state == HTTPSTATE_WAIT_FEED && 
                    c1->stream->feed == c->stream->feed) {
                    c1->state = HTTPSTATE_SEND_DATA;
                }
            }
        } else {
            /* We have a header in our hands that contains useful data */
            AVFormatContext s;
            AVInputFormat *fmt_in;
            ByteIOContext *pb = &s.pb;
            int i;

            memset(&s, 0, sizeof(s));

            url_open_buf(pb, c->buffer, c->buffer_end - c->buffer, URL_RDONLY);
            pb->buf_end = c->buffer_end;        /* ?? */
            pb->is_streamed = 1;

            /* use feed output format name to find corresponding input format */
            fmt_in = av_find_input_format(feed->fmt->name);
            if (!fmt_in)
                goto fail;

            s.priv_data = av_mallocz(fmt_in->priv_data_size);
            if (!s.priv_data)
                goto fail;

            if (fmt_in->read_header(&s, 0) < 0) {
                av_freep(&s.priv_data);
                goto fail;
            }

            /* Now we have the actual streams */
            if (s.nb_streams != feed->nb_streams) {
                av_freep(&s.priv_data);
                goto fail;
            }
            for (i = 0; i < s.nb_streams; i++) {
                memcpy(&feed->streams[i]->codec, 
                       &s.streams[i]->codec, sizeof(AVCodecContext));
            } 
            av_freep(&s.priv_data);
        }
        c->buffer_ptr = c->buffer;
    }

    return 0;
 fail:
    c->stream->feed_opened = 0;
    close(c->feed_fd);
    return -1;
}

/* return the stream number in the feed */
int add_av_stream(FFStream *feed,
                  AVStream *st)
{
    AVStream *fst;
    AVCodecContext *av, *av1;
    int i;

    av = &st->codec;
    for(i=0;i<feed->nb_streams;i++) {
        st = feed->streams[i];
        av1 = &st->codec;
        if (av1->codec_id == av->codec_id &&
            av1->codec_type == av->codec_type &&
            av1->bit_rate == av->bit_rate) {

            switch(av->codec_type) {
            case CODEC_TYPE_AUDIO:
                if (av1->channels == av->channels &&
                    av1->sample_rate == av->sample_rate)
                    goto found;
                break;
            case CODEC_TYPE_VIDEO:
                if (av1->width == av->width &&
                    av1->height == av->height &&
                    av1->frame_rate == av->frame_rate &&
                    av1->gop_size == av->gop_size)
                    goto found;
                break;
            default:
                av_abort();
            }
        }
    }
    
    fst = av_mallocz(sizeof(AVStream));
    if (!fst)
        return -1;
    fst->priv_data = av_mallocz(sizeof(FeedData));
    memcpy(&fst->codec, av, sizeof(AVCodecContext));
    feed->streams[feed->nb_streams++] = fst;
    return feed->nb_streams - 1;
 found:
    return i;
}

/* compute the needed AVStream for each feed */
void build_feed_streams(void)
{
    FFStream *stream, *feed;
    int i;

    /* gather all streams */
    for(stream = first_stream; stream != NULL; stream = stream->next) {
        feed = stream->feed;
        if (feed) {
            if (!stream->is_feed) {
                for(i=0;i<stream->nb_streams;i++) {
                    stream->feed_streams[i] = add_av_stream(feed, stream->streams[i]);
                }
            } else {
                for(i=0;i<stream->nb_streams;i++) {
                    stream->feed_streams[i] = i;
                }
            }
        }
    }

    /* create feed files if needed */
    for(feed = first_feed; feed != NULL; feed = feed->next_feed) {
        int fd;

        if (!url_exist(feed->feed_filename)) {
            AVFormatContext s1, *s = &s1;

            /* only write the header of the ffm file */
            if (url_fopen(&s->pb, feed->feed_filename, URL_WRONLY) < 0) {
                fprintf(stderr, "Could not open output feed file '%s'\n",
                        feed->feed_filename);
                exit(1);
            }
            s->oformat = feed->fmt;
            s->nb_streams = feed->nb_streams;
            for(i=0;i<s->nb_streams;i++) {
                AVStream *st;
                st = feed->streams[i];
                s->streams[i] = st;
            }
            av_write_header(s);
            /* XXX: need better api */
            av_freep(&s->priv_data);
            url_fclose(&s->pb);
        }
        /* get feed size and write index */
        fd = open(feed->feed_filename, O_RDONLY);
        if (fd < 0) {
            fprintf(stderr, "Could not open output feed file '%s'\n",
                    feed->feed_filename);
            exit(1);
        }

        feed->feed_write_index = ffm_read_write_index(fd);
        feed->feed_size = lseek(fd, 0, SEEK_END);
        /* ensure that we do not wrap before the end of file */
        if (feed->feed_max_size < feed->feed_size)
            feed->feed_max_size = feed->feed_size;

        close(fd);
    }
}

static void get_arg(char *buf, int buf_size, const char **pp)
{
    const char *p;
    char *q;
    int quote;

    p = *pp;
    while (isspace(*p)) p++;
    q = buf;
    quote = 0;
    if (*p == '\"' || *p == '\'')
        quote = *p++;
    for(;;) {
        if (quote) {
            if (*p == quote)
                break;
        } else {
            if (isspace(*p))
                break;
        }
        if (*p == '\0')
            break;
        if ((q - buf) < buf_size - 1)
            *q++ = *p;
        p++;
    }
    *q = '\0';
    if (quote && *p == quote)
        p++;
    *pp = p;
}

/* add a codec and set the default parameters */
void add_codec(FFStream *stream, AVCodecContext *av)
{
    AVStream *st;

    /* compute default parameters */
    switch(av->codec_type) {
    case CODEC_TYPE_AUDIO:
        if (av->bit_rate == 0)
            av->bit_rate = 64000;
        if (av->sample_rate == 0)
            av->sample_rate = 22050;
        if (av->channels == 0)
            av->channels = 1;
        break;
    case CODEC_TYPE_VIDEO:
        if (av->bit_rate == 0)
            av->bit_rate = 64000;
        if (av->frame_rate == 0)
            av->frame_rate = 5 * FRAME_RATE_BASE;
        if (av->width == 0 || av->height == 0) {
            av->width = 160;
            av->height = 128;
        }
        /* Bitrate tolerance is less for streaming */
        if (av->bit_rate_tolerance == 0)
            av->bit_rate_tolerance = av->bit_rate / 4;
        if (av->qmin == 0)
            av->qmin = 3;
        if (av->qmax == 0)
            av->qmax = 31;
        if (av->max_qdiff == 0)
            av->max_qdiff = 3;
        av->qcompress = 0.5;
        av->qblur = 0.5;

        break;
    default:
        av_abort();
    }

    st = av_mallocz(sizeof(AVStream));
    if (!st)
        return;
    stream->streams[stream->nb_streams++] = st;
    memcpy(&st->codec, av, sizeof(AVCodecContext));
}

int opt_audio_codec(const char *arg)
{
    AVCodec *p;

    p = first_avcodec;
    while (p) {
        if (!strcmp(p->name, arg) && p->type == CODEC_TYPE_AUDIO)
            break;
        p = p->next;
    }
    if (p == NULL) {
        return CODEC_ID_NONE;
    }

    return p->id;
}

int opt_video_codec(const char *arg)
{
    AVCodec *p;

    p = first_avcodec;
    while (p) {
        if (!strcmp(p->name, arg) && p->type == CODEC_TYPE_VIDEO)
            break;
        p = p->next;
    }
    if (p == NULL) {
        return CODEC_ID_NONE;
    }

    return p->id;
}

int parse_ffconfig(const char *filename)
{
    FILE *f;
    char line[1024];
    char cmd[64];
    char arg[1024];
    const char *p;
    int val, errors, line_num;
    FFStream **last_stream, *stream;
    FFStream **last_feed, *feed;
    AVCodecContext audio_enc, video_enc;
    int audio_id, video_id;

    f = fopen(filename, "r");
    if (!f) {
        perror(filename);
        return -1;
    }
    
    errors = 0;
    line_num = 0;
    first_stream = NULL;
    last_stream = &first_stream;
    first_feed = NULL;
    last_feed = &first_feed;
    stream = NULL;
    feed = NULL;
    audio_id = CODEC_ID_NONE;
    video_id = CODEC_ID_NONE;
    for(;;) {
        if (fgets(line, sizeof(line), f) == NULL)
            break;
        line_num++;
        p = line;
        while (isspace(*p)) 
            p++;
        if (*p == '\0' || *p == '#')
            continue;

        get_arg(cmd, sizeof(cmd), &p);
        
        if (!strcasecmp(cmd, "Port")) {
            get_arg(arg, sizeof(arg), &p);
            my_addr.sin_port = htons (atoi(arg));
        } else if (!strcasecmp(cmd, "BindAddress")) {
            get_arg(arg, sizeof(arg), &p);
            if (!inet_aton(arg, &my_addr.sin_addr)) {
                fprintf(stderr, "%s:%d: Invalid IP address: %s\n", 
                        filename, line_num, arg);
                errors++;
            }
        } else if (!strcasecmp(cmd, "MaxClients")) {
            get_arg(arg, sizeof(arg), &p);
            val = atoi(arg);
            if (val < 1 || val > HTTP_MAX_CONNECTIONS) {
                fprintf(stderr, "%s:%d: Invalid MaxClients: %s\n", 
                        filename, line_num, arg);
                errors++;
            } else {
                nb_max_connections = val;
            }
        } else if (!strcasecmp(cmd, "MaxBandwidth")) {
            get_arg(arg, sizeof(arg), &p);
            val = atoi(arg);
            if (val < 10 || val > 100000) {
                fprintf(stderr, "%s:%d: Invalid MaxBandwidth: %s\n", 
                        filename, line_num, arg);
                errors++;
            } else {
                nb_max_bandwidth = val;
            }
        } else if (!strcasecmp(cmd, "CustomLog")) {
            get_arg(logfilename, sizeof(logfilename), &p);
        } else if (!strcasecmp(cmd, "<Feed")) {
            /*********************************************/
            /* Feed related options */
            char *q;
            if (stream || feed) {
                fprintf(stderr, "%s:%d: Already in a tag\n",
                        filename, line_num);
            } else {
                feed = av_mallocz(sizeof(FFStream));
                /* add in stream list */
                *last_stream = feed;
                last_stream = &feed->next;
                /* add in feed list */
                *last_feed = feed;
                last_feed = &feed->next_feed;
                
                get_arg(feed->filename, sizeof(feed->filename), &p);
                q = strrchr(feed->filename, '>');
                if (*q)
                    *q = '\0';
                feed->fmt = guess_format("ffm", NULL, NULL);
                /* defaut 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 :-) */
            }
        } else if (!strcasecmp(cmd, "File")) {
            if (feed) {
                get_arg(feed->feed_filename, sizeof(feed->feed_filename), &p);
            } else if (stream) {
                get_arg(stream->feed_filename, sizeof(stream->feed_filename), &p);
            }
        } else if (!strcasecmp(cmd, "FileMaxSize")) {
            if (feed) {
                const char *p1;
                double fsize;

                get_arg(arg, sizeof(arg), &p);
                p1 = arg;
                fsize = strtod(p1, (char **)&p1);
                switch(toupper(*p1)) {
                case 'K':
                    fsize *= 1024;
                    break;
                case 'M':
                    fsize *= 1024 * 1024;
                    break;
                case 'G':
                    fsize *= 1024 * 1024 * 1024;
                    break;
                }
                feed->feed_max_size = (INT64)fsize;
            }
        } else if (!strcasecmp(cmd, "</Feed>")) {
            if (!feed) {
                fprintf(stderr, "%s:%d: No corresponding <Feed> for </Feed>\n",
                        filename, line_num);
                errors++;
            } else {
                /* Make sure that we start out clean */
                if (unlink(feed->feed_filename) < 0 
                    && errno != ENOENT) {
                    fprintf(stderr, "%s:%d: Unable to clean old feed file '%s': %s\n",
                        filename, line_num, feed->feed_filename, strerror(errno));
                    errors++;
                }
            }
            feed = NULL;
        } else if (!strcasecmp(cmd, "<Stream")) {
            /*********************************************/
            /* Stream related options */
            char *q;
            if (stream || feed) {
                fprintf(stderr, "%s:%d: Already in a tag\n",
                        filename, line_num);
            } else {
                stream = av_mallocz(sizeof(FFStream));
                *last_stream = stream;
                last_stream = &stream->next;

                get_arg(stream->filename, sizeof(stream->filename), &p);
                q = strrchr(stream->filename, '>');
                if (*q)
                    *q = '\0';
                stream->fmt = guess_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, "singlejpeg");
                stream->fmt = guess_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, "Preroll")) {
            get_arg(arg, sizeof(arg), &p);
            if (stream) {
                stream->prebuffer = atoi(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 = atoi(arg);
            }
        } 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, "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.frame_rate = (int)(strtod(arg, NULL) * FRAME_RATE_BASE);
            }
        } 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.flags |= CODEC_FLAG_HQ;
            }
        } else if (!strcasecmp(cmd, "VideoQDiff")) {
            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")) {
            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")) {
            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, "NoVideo")) {
            video_id = CODEC_ID_NONE;
        } else if (!strcasecmp(cmd, "NoAudio")) {
            audio_id = CODEC_ID_NONE;
        } 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 {
            fprintf(stderr, "%s:%d: Incorrect keyword: '%s'\n", 
                    filename, line_num, cmd);
            errors++;
        }
    }

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


void *http_server_thread(void *arg)
{
    http_server(my_addr);
    return NULL;
}

#if 0
static void write_packet(FFCodec *ffenc,
                         UINT8 *buf, int size)
{
    PacketHeader hdr;
    AVCodecContext *enc = &ffenc->enc;
    UINT8 *wptr;
    mk_header(&hdr, enc, size);
    wptr = http_fifo.wptr;
    fifo_write(&http_fifo, (UINT8 *)&hdr, sizeof(hdr), &wptr);
    fifo_write(&http_fifo, buf, size, &wptr);
    /* atomic modification of wptr */
    http_fifo.wptr = wptr;
    ffenc->data_count += size;
    ffenc->avg_frame_size = ffenc->avg_frame_size * AVG_COEF + size * (1.0 - AVG_COEF);
}
#endif

void help(void)
{
    printf("ffserver version " FFMPEG_VERSION ", Copyright (c) 2000, 2001, 2002 Gerard Lantau\n"
           "usage: ffserver [-L] [-h] [-f configfile]\n"
           "Hyper fast multi format Audio/Video streaming server\n"
           "\n"
           "-L            : print the LICENCE\n"
           "-h            : this help\n"
           "-f configfile : use configfile instead of /etc/ffserver.conf\n"
           );
}

void licence(void)
{
    printf(
    "ffserver version " FFMPEG_VERSION "\n"
    "Copyright (c) 2000, 2001, 2002 Gerard Lantau\n"
    "This program is free software; you can redistribute it and/or modify\n"
    "it under the terms of the GNU General Public License as published by\n"
    "the Free Software Foundation; either version 2 of the License, or\n"
    "(at your option) any later version.\n"
    "\n"
    "This program 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\n"
    "GNU General Public License for more details.\n"
    "\n"
    "You should have received a copy of the GNU General Public License\n"
    "along with this program; if not, write to the Free Software\n"
    "Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.\n"