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FFmpeg/ffserver.c

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/*
* Multiple format streaming server
* Copyright (c) 2000,2001 Gerard Lantau.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <netinet/in.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/poll.h>
#include <errno.h>
#include <sys/time.h>
#include <time.h>
#include <getopt.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <ctype.h>
#include <signal.h>
#include <assert.h>
#include "bswap.h" // needed for the bitstream writer in common.h which is included in avformat.h
#include "avformat.h"
/* maximum number of simultaneous HTTP connections */
#define HTTP_MAX_CONNECTIONS 2000
enum HTTPState {
HTTPSTATE_WAIT_REQUEST,
HTTPSTATE_SEND_HEADER,
HTTPSTATE_SEND_DATA_HEADER,
HTTPSTATE_SEND_DATA,
HTTPSTATE_SEND_DATA_TRAILER,
HTTPSTATE_RECEIVE_DATA,
HTTPSTATE_WAIT_FEED,
};
const char *http_state[] = {
"WAIT_REQUEST",
"SEND_HEADER",
"SEND_DATA_HEADER",
"SEND_DATA",
"SEND_DATA_TRAILER",
"RECEIVE_DATA",
"WAIT_FEED",
};
#define IOBUFFER_MAX_SIZE 16384
/* coef for exponential mean for bitrate estimation in statistics */
#define AVG_COEF 0.9
/* timeouts are in ms */
#define REQUEST_TIMEOUT (15 * 1000)
#define SYNC_TIMEOUT (10 * 1000)
/* context associated with one connection */
typedef struct HTTPContext {
enum HTTPState state;
int fd; /* socket file descriptor */
struct sockaddr_in from_addr; /* origin */
struct pollfd *poll_entry; /* used when polling */
long timeout;
UINT8 buffer[IOBUFFER_MAX_SIZE];
UINT8 *buffer_ptr, *buffer_end;
int http_error;
struct HTTPContext *next;
int got_key_frame[MAX_STREAMS]; /* for each type */
INT64 data_count;
/* feed input */
int feed_fd;
/* input format handling */
AVFormatContext *fmt_in;
/* output format handling */
struct FFStream *stream;
AVFormatContext fmt_ctx;
int last_packet_sent; /* true if last data packet was sent */
} HTTPContext;
/* each generated stream is described here */
enum StreamType {
STREAM_TYPE_LIVE,
STREAM_TYPE_STATUS,
};
/* description of each stream of the ffserver.conf file */
typedef struct FFStream {
enum StreamType stream_type;
char filename[1024]; /* stream filename */
struct FFStream *feed;
AVFormat *fmt;
int nb_streams;
AVStream *streams[MAX_STREAMS];
int feed_streams[MAX_STREAMS]; /* index of streams in the feed */
char feed_filename[1024]; /* file name of the feed storage, or
input file name for a stream */
struct FFStream *next;
/* feed specific */
int feed_opened; /* true if someone if writing to feed */
int is_feed; /* true if it is a feed */
INT64 feed_max_size; /* maximum storage size */
INT64 feed_write_index; /* current write position in feed (it wraps round) */
INT64 feed_size; /* current size of feed */
struct FFStream *next_feed;
} FFStream;
typedef struct FeedData {
long long data_count;
float avg_frame_size; /* frame size averraged over last frames with exponential mean */
} FeedData;
struct sockaddr_in my_addr;
char logfilename[1024];
HTTPContext *first_http_ctx;
FFStream *first_feed; /* contains only feeds */
FFStream *first_stream; /* contains all streams, including feeds */
static int handle_http(HTTPContext *c, long cur_time);
static int http_parse_request(HTTPContext *c);
static int http_send_data(HTTPContext *c);
static void compute_stats(HTTPContext *c);
static int open_input_stream(HTTPContext *c, const char *info);
static int http_start_receive_data(HTTPContext *c);
static int http_receive_data(HTTPContext *c);
int nb_max_connections;
int nb_connections;
static long gettime_ms(void)
{
struct timeval tv;
gettimeofday(&tv,NULL);
return (long long)tv.tv_sec * 1000 + (tv.tv_usec / 1000);
}
static FILE *logfile = NULL;
static void http_log(char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
if (logfile)
vfprintf(logfile, fmt, ap);
va_end(ap);
}
/* main loop of the http server */
static int http_server(struct sockaddr_in my_addr)
{
int server_fd, tmp, ret;
struct sockaddr_in from_addr;
struct pollfd poll_table[HTTP_MAX_CONNECTIONS + 1], *poll_entry;
HTTPContext *c, **cp;
long cur_time;
server_fd = socket(AF_INET,SOCK_STREAM,0);
if (server_fd < 0) {
perror ("socket");
return -1;
}
tmp = 1;
setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR, &tmp, sizeof(tmp));
if (bind (server_fd, (struct sockaddr *) &my_addr, sizeof (my_addr)) < 0) {
perror ("bind");
close(server_fd);
return -1;
}
if (listen (server_fd, 5) < 0) {
perror ("listen");
close(server_fd);
return -1;
}
http_log("ffserver started.\n");
fcntl(server_fd, F_SETFL, O_NONBLOCK);
first_http_ctx = NULL;
nb_connections = 0;
first_http_ctx = NULL;
for(;;) {
poll_entry = poll_table;
poll_entry->fd = server_fd;
poll_entry->events = POLLIN;
poll_entry++;
/* wait for events on each HTTP handle */
c = first_http_ctx;
while (c != NULL) {
int fd;
fd = c->fd;
switch(c->state) {
case HTTPSTATE_WAIT_REQUEST:
c->poll_entry = poll_entry;
poll_entry->fd = fd;
poll_entry->events = POLLIN;
poll_entry++;
break;
case HTTPSTATE_SEND_HEADER:
case HTTPSTATE_SEND_DATA_HEADER:
case HTTPSTATE_SEND_DATA:
case HTTPSTATE_SEND_DATA_TRAILER:
c->poll_entry = poll_entry;
poll_entry->fd = fd;
poll_entry->events = POLLOUT;
poll_entry++;
break;
case HTTPSTATE_RECEIVE_DATA:
c->poll_entry = poll_entry;
poll_entry->fd = fd;
poll_entry->events = POLLIN;
poll_entry++;
break;
case HTTPSTATE_WAIT_FEED:
/* need to catch errors */
c->poll_entry = poll_entry;
poll_entry->fd = fd;
poll_entry->events = 0;
poll_entry++;
break;
default:
c->poll_entry = NULL;
break;
}
c = c->next;
}
/* wait for an event on one connection. We poll at least every
second to handle timeouts */
do {
ret = poll(poll_table, poll_entry - poll_table, 1000);
} while (ret == -1);
cur_time = gettime_ms();
/* now handle the events */
cp = &first_http_ctx;
while ((*cp) != NULL) {
c = *cp;
if (handle_http (c, cur_time) < 0) {
/* close and free the connection */
close(c->fd);
if (c->fmt_in)
av_close_input_file(c->fmt_in);
*cp = c->next;
free(c);
nb_connections--;
} else {
cp = &c->next;
}
}
/* new connection request ? */
poll_entry = poll_table;
if (poll_entry->revents & POLLIN) {
int fd, len;
len = sizeof(from_addr);
fd = accept(server_fd, (struct sockaddr *)&from_addr,
&len);
if (fd >= 0) {
fcntl(fd, F_SETFL, O_NONBLOCK);
/* XXX: should output a warning page when coming
close to the connection limit */
if (nb_connections >= nb_max_connections) {
close(fd);
} else {
/* add a new connection */
c = av_mallocz(sizeof(HTTPContext));
c->next = first_http_ctx;
first_http_ctx = c;
c->fd = fd;
c->poll_entry = NULL;
c->from_addr = from_addr;
c->state = HTTPSTATE_WAIT_REQUEST;
c->buffer_ptr = c->buffer;
c->buffer_end = c->buffer + IOBUFFER_MAX_SIZE;
c->timeout = cur_time + REQUEST_TIMEOUT;
nb_connections++;
}
}
}
poll_entry++;
}
}
static int handle_http(HTTPContext *c, long cur_time)
{
int len;
switch(c->state) {
case HTTPSTATE_WAIT_REQUEST:
/* timeout ? */
if ((c->timeout - cur_time) < 0)
return -1;
if (c->poll_entry->revents & (POLLERR | POLLHUP))
return -1;
/* no need to read if no events */
if (!(c->poll_entry->revents & POLLIN))
return 0;
/* read the data */
len = read(c->fd, c->buffer_ptr, c->buffer_end - c->buffer_ptr);
if (len < 0) {
if (errno != EAGAIN && errno != EINTR)
return -1;
} else if (len == 0) {
return -1;
} else {
/* search for end of request. XXX: not fully correct since garbage could come after the end */
UINT8 *ptr;
c->buffer_ptr += len;
ptr = c->buffer_ptr;
if ((ptr >= c->buffer + 2 && !memcmp(ptr-2, "\n\n", 2)) ||
(ptr >= c->buffer + 4 && !memcmp(ptr-4, "\r\n\r\n", 4))) {
/* request found : parse it and reply */
if (http_parse_request(c) < 0)
return -1;
} else if (ptr >= c->buffer_end) {
/* request too long: cannot do anything */
return -1;
}
}
break;
case HTTPSTATE_SEND_HEADER:
if (c->poll_entry->revents & (POLLERR | POLLHUP))
return -1;
/* no need to read if no events */
if (!(c->poll_entry->revents & POLLOUT))
return 0;
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;
if (c->buffer_ptr >= c->buffer_end) {
/* if error, exit */
if (c->http_error)
return -1;
/* all the buffer was send : synchronize to the incoming stream */
c->state = HTTPSTATE_SEND_DATA_HEADER;
c->buffer_ptr = c->buffer_end = c->buffer;
}
}
break;
case HTTPSTATE_SEND_DATA:
case HTTPSTATE_SEND_DATA_HEADER:
case HTTPSTATE_SEND_DATA_TRAILER:
/* no need to read if no events */
if (c->poll_entry->revents & (POLLERR | POLLHUP))
return -1;
if (!(c->poll_entry->revents & POLLOUT))
return 0;
if (http_send_data(c) < 0)
return -1;
break;
case HTTPSTATE_RECEIVE_DATA:
/* no need to read if no events */
if (c->poll_entry->revents & (POLLERR | POLLHUP))
return -1;
if (!(c->poll_entry->revents & POLLIN))
return 0;
if (http_receive_data(c) < 0)
return -1;
break;
case HTTPSTATE_WAIT_FEED:
/* no need to read if no events */
if (c->poll_entry->revents & (POLLERR | POLLHUP))
return -1;
/* nothing to do, we'll be waken up by incoming feed packets */
break;
default:
return -1;
}
return 0;
}
/* parse http request and prepare header */
static int http_parse_request(HTTPContext *c)
{
char *p;
int post;
char cmd[32];
char info[1024], *filename;
char url[1024], *q;
char protocol[32];
char msg[1024];
const char *mime_type;
FFStream *stream;
p = c->buffer;
q = cmd;
while (!isspace(*p) && *p != '\0') {
if ((q - cmd) < sizeof(cmd) - 1)
*q++ = *p;
p++;
}
*q = '\0';
if (!strcmp(cmd, "GET"))
post = 0;
else if (!strcmp(cmd, "POST"))
post = 1;
else
return -1;
while (isspace(*p)) p++;
q = url;
while (!isspace(*p) && *p != '\0') {
if ((q - url) < sizeof(url) - 1)
*q++ = *p;
p++;
}
*q = '\0';
while (isspace(*p)) p++;
q = protocol;
while (!isspace(*p) && *p != '\0') {
if ((q - protocol) < sizeof(protocol) - 1)
*q++ = *p;
p++;
}
*q = '\0';
if (strcmp(protocol, "HTTP/1.0") && strcmp(protocol, "HTTP/1.1"))
return -1;
/* find the filename and the optional info string in the request */
p = url;
if (*p == '/')
p++;
filename = p;
p = strchr(p, '?');
if (p) {
strcpy(info, p);
*p = '\0';
} else {
info[0] = '\0';
}
stream = first_stream;
while (stream != NULL) {
if (!strcmp(stream->filename, filename))
break;
stream = stream->next;
}
if (stream == NULL) {
sprintf(msg, "File '%s' not found", url);
goto send_error;
}
c->stream = stream;
/* should do it after so that the size can be computed */
{
char buf1[32], buf2[32], *p;
time_t ti;
/* XXX: reentrant function ? */
p = inet_ntoa(c->from_addr.sin_addr);
strcpy(buf1, p);
ti = time(NULL);
p = ctime(&ti);
strcpy(buf2, p);
p = buf2 + strlen(p) - 1;
if (*p == '\n')
*p = '\0';
http_log("%s - - [%s] \"%s %s %s\" %d %d\n",
buf1, buf2, cmd, url, protocol, 200, 1024);
}
/* XXX: add there authenticate and IP match */
if (post) {
/* if post, it means a feed is being sent */
if (!stream->is_feed) {
sprintf(msg, "POST command not handled");
goto send_error;
}
if (http_start_receive_data(c) < 0) {
sprintf(msg, "could not open feed");
goto send_error;
}
c->http_error = 0;
c->state = HTTPSTATE_RECEIVE_DATA;
return 0;
}
if (c->stream->stream_type == STREAM_TYPE_STATUS)
goto send_stats;
/* open input stream */
if (open_input_stream(c, info) < 0) {
sprintf(msg, "Input stream corresponding to '%s' not found", url);
goto send_error;
}
/* prepare http header */
q = c->buffer;
q += sprintf(q, "HTTP/1.0 200 OK\r\n");
mime_type = c->stream->fmt->mime_type;
if (!mime_type)
mime_type = "application/x-octet_stream";
q += sprintf(q, "Content-type: %s\r\n", mime_type);
q += sprintf(q, "Pragma: no-cache\r\n");
/* for asf, we need extra headers */
if (!strcmp(c->stream->fmt->name,"asf")) {
q += sprintf(q, "Pragma: features=broadcast\r\n");
}
q += sprintf(q, "\r\n");
/* prepare output buffer */
c->http_error = 0;
c->buffer_ptr = c->buffer;
c->buffer_end = q;
c->state = HTTPSTATE_SEND_HEADER;
return 0;
send_error:
c->http_error = 404;
q = c->buffer;
q += sprintf(q, "HTTP/1.0 404 Not Found\r\n");
q += sprintf(q, "Content-type: %s\r\n", "text/html");
q += sprintf(q, "\r\n");
q += sprintf(q, "<HTML>\n");
q += sprintf(q, "<HEAD><TITLE>404 Not Found</TITLE></HEAD>\n");
q += sprintf(q, "<BODY>%s</BODY>\n", msg);
q += sprintf(q, "</HTML>\n");
/* prepare output buffer */
c->buffer_ptr = c->buffer;
c->buffer_end = q;
c->state = HTTPSTATE_SEND_HEADER;
return 0;
send_stats:
compute_stats(c);
c->http_error = 200; /* horrible : we use this value to avoid
going to the send data state */
c->state = HTTPSTATE_SEND_HEADER;
return 0;
}
static void compute_stats(HTTPContext *c)
{
HTTPContext *c1;
FFStream *stream;
char *q, *p;
time_t ti;
int i;
q = c->buffer;
q += sprintf(q, "HTTP/1.0 200 OK\r\n");
q += sprintf(q, "Content-type: %s\r\n", "text/html");
q += sprintf(q, "Pragma: no-cache\r\n");
q += sprintf(q, "\r\n");
q += sprintf(q, "<HEAD><TITLE>FFServer Status</TITLE></HEAD>\n<BODY>");
q += sprintf(q, "<H1>FFServer Status</H1>\n");
/* format status */
q += sprintf(q, "<H1>Available Streams</H1>\n");
q += sprintf(q, "<TABLE>\n");
q += sprintf(q, "<TR><TD>Path<TD>Format<TD>Bit rate (kbits/s)<TD>Video<TD>Audio<TD>Feed\n");
stream = first_stream;
while (stream != NULL) {
q += sprintf(q, "<TR><TD><A HREF=\"/%s\">%s</A> ",
stream->filename, stream->filename);
switch(stream->stream_type) {
case STREAM_TYPE_LIVE:
{
int audio_bit_rate = 0;
int video_bit_rate = 0;
for(i=0;i<stream->nb_streams;i++) {
AVStream *st = stream->streams[i];
switch(st->codec.codec_type) {
case CODEC_TYPE_AUDIO:
audio_bit_rate += st->codec.bit_rate;
break;
case CODEC_TYPE_VIDEO:
video_bit_rate += st->codec.bit_rate;
break;
}
}
q += sprintf(q, "<TD> %s <TD> %d <TD> %d <TD> %d",
stream->fmt->name,
(audio_bit_rate + video_bit_rate) / 1000,
video_bit_rate / 1000, audio_bit_rate / 1000);
if (stream->feed) {
q += sprintf(q, "<TD>%s", stream->feed->filename);
} else {
q += sprintf(q, "<TD>%s", stream->feed_filename);
}
q += sprintf(q, "\n");
}
break;
default:
q += sprintf(q, "<TD> - <TD> - <TD> - <TD> -\n");
break;
}
stream = stream->next;
}
q += sprintf(q, "</TABLE>\n");
#if 0
{
float avg;
AVCodecContext *enc;
char buf[1024];
/* feed status */
stream = first_feed;
while (stream != NULL) {
q += sprintf(q, "<H1>Feed '%s'</H1>\n", stream->filename);
q += sprintf(q, "<TABLE>\n");
q += sprintf(q, "<TR><TD>Parameters<TD>Frame count<TD>Size<TD>Avg bitrate (kbits/s)\n");
for(i=0;i<stream->nb_streams;i++) {
AVStream *st = stream->streams[i];
FeedData *fdata = st->priv_data;
enc = &st->codec;
avcodec_string(buf, sizeof(buf), enc);
avg = fdata->avg_frame_size * (float)enc->rate * 8.0;
if (enc->codec->type == CODEC_TYPE_AUDIO && enc->frame_size > 0)
avg /= enc->frame_size;
q += sprintf(q, "<TR><TD>%s <TD> %d <TD> %Ld <TD> %0.1f\n",
buf, enc->frame_number, fdata->data_count, avg / 1000.0);
}
q += sprintf(q, "</TABLE>\n");
stream = stream->next_feed;
}
}
#endif
/* connection status */
q += sprintf(q, "<H1>Connection Status</H1>\n");
q += sprintf(q, "Number of connections: %d / %d<BR>\n",
nb_connections, nb_max_connections);
q += sprintf(q, "<TABLE>\n");
q += sprintf(q, "<TR><TD>#<TD>File<TD>IP<TD>State<TD>Size\n");
c1 = first_http_ctx;
i = 0;
while (c1 != NULL) {
i++;
p = inet_ntoa(c1->from_addr.sin_addr);
q += sprintf(q, "<TR><TD><B>%d</B><TD>%s%s <TD> %s <TD> %s <TD> %Ld\n",
i, c1->stream->filename,
c1->state == HTTPSTATE_RECEIVE_DATA ? "(input)" : "",
p,
http_state[c1->state],
c1->data_count);
c1 = c1->next;
}
q += sprintf(q, "</TABLE>\n");
/* date */
ti = time(NULL);
p = ctime(&ti);
q += sprintf(q, "<HR>Generated at %s", p);
q += sprintf(q, "</BODY>\n</HTML>\n");
c->buffer_ptr = c->buffer;
c->buffer_end = q;
}
static void http_write_packet(void *opaque,
unsigned char *buf, int size)
{
HTTPContext *c = opaque;
if (size > IOBUFFER_MAX_SIZE)
abort();
memcpy(c->buffer, buf, size);
c->buffer_ptr = c->buffer;
c->buffer_end = c->buffer + size;
}
static int open_input_stream(HTTPContext *c, const char *info)
{
char buf[128];
char input_filename[1024];
AVFormatContext *s;
int buf_size;
INT64 stream_pos;
/* find file name */
if (c->stream->feed) {
strcpy(input_filename, c->stream->feed->feed_filename);
buf_size = FFM_PACKET_SIZE;
/* compute position (absolute time) */
if (find_info_tag(buf, sizeof(buf), "date", info)) {
stream_pos = parse_date(buf, 0);
} else {
stream_pos = gettime();
}
} else {
strcpy(input_filename, c->stream->feed_filename);
buf_size = 0;
/* compute position (relative time) */
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 */
s = av_open_input_file(input_filename, NULL, buf_size, NULL);
if (!s)
return -1;
c->fmt_in = s;
if (c->fmt_in->format->read_seek) {
c->fmt_in->format->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.format = 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;
memcpy(st, c->stream->streams[i], sizeof(AVStream));
st->codec.frame_number = 0; /* XXX: should be done in
AVStream, not in codec */
c->got_key_frame[i] = 0;
}
} else {
/* open output stream by using codecs in specified file */
c->fmt_ctx.format = 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[i] = 0;
}
}
init_put_byte(&c->fmt_ctx.pb, c->buffer, IOBUFFER_MAX_SIZE,
1, c, NULL, http_write_packet, NULL);
c->fmt_ctx.pb.is_streamed = 1;
/* prepare header */
c->fmt_ctx.format->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;
for(i=0;i<c->fmt_ctx.nb_streams;i++) {
c->got_key_frame[i] = 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 = malloc(payload_size);
if (fifo_read(&http_fifo, payload, payload_size, &c->rptr) < 0) {
/* cannot read all the payload */
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[i] = 1;
if (c->got_key_frame[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;
}
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 (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;
goto send_it;
}
}
} else {
send_it:
if (av_write_packet(&c->fmt_ctx, &pkt))
c->state = HTTPSTATE_SEND_DATA_TRAILER;
}
av_free_packet(&pkt);
}
}
break;
default:
case HTTPSTATE_SEND_DATA_TRAILER:
/* last packet test ? */
if (c->last_packet_sent)
return -1;
/* prepare header */
c->fmt_ctx.format->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) {
break;
} else {
/* state change requested */
return 0;
}
}
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;
}
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)
{
int len;
HTTPContext *c1;
if (c->buffer_ptr >= c->buffer_end) {
/* a packet has been received : write it in the store, except
if header */
if (c->data_count > FFM_PACKET_SIZE) {
FFStream *feed = c->stream;
// 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;
}
}
}
c->buffer_ptr = c->buffer;
}
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;
}
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 == av->codec &&
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;
}
}
}
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->format = 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;
}
s->format->write_header(s);
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;
}
break;
}
st = av_mallocz(sizeof(AVStream));
if (!st)
return;
stream->streams[stream->nb_streams++] = st;
memcpy(&st->codec, av, sizeof(AVCodecContext));
}
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, "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++;
}
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, "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, "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 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 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"
);
}
int main(int argc, char **argv)
{
const char *config_filename;
int c;
register_all();
config_filename = "/etc/ffserver.conf";
for(;;) {
c = getopt_long_only(argc, argv, "Lh?f:", NULL, NULL);
if (c == -1)
break;
switch(c) {
case 'L':
licence();
exit(1);
case '?':
case 'h':
help();
exit(1);
case 'f':
config_filename = optarg;
break;
default:
exit(2);
}
}
/* address on which the server will handle connections */
my_addr.sin_family = AF_INET;
my_addr.sin_port = htons (8080);
my_addr.sin_addr.s_addr = htonl (INADDR_ANY);
nb_max_connections = 5;
first_stream = NULL;
logfilename[0] = '\0';
if (parse_ffconfig(config_filename) < 0) {
fprintf(stderr, "Incorrect config file - exiting.\n");
exit(1);
}
build_feed_streams();
/* 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(my_addr) < 0) {
fprintf(stderr, "Could start http server\n");
exit(1);
}
return 0;
}