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3120d2a265
ffmpeg/ffserver.c
Philip Gladstone 3120d2a265 * Add first cut of code to handle Windows Media Player rate switching 
requests. The current state is that at startup, WMP will get the
  best stream that it can handle. However, subsequent rate switching
  only puts a message in the log saying what the new stream ought to
  be. Solving this will be tricky. I guess that we would have to wait for
  key frames to appear in the new stream, and then switch over to it.
  Some care would be needed to deal with the PTS of the new stream
  versus the old stream.

Originally committed as revision 602 to svn://svn.ffmpeg.org/ffmpeg/trunk
2002-05-26 03:36:34 +00:00

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/*
* Multiple format streaming server
* Copyright (c) 2000, 2001, 2002 Fabrice Bellard
*
* This library 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 of the License, or (at your option) any later version.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#define HAVE_AV_CONFIG_H
#include "avformat.h"
#include <stdarg.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>
/* 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 32768
#define PACKET_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_ptr, *buffer_end;
int http_error;
struct HTTPContext *next;
int got_key_frame; /* stream 0 => 1, stream 1 => 2, stream 2=> 4 */
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 */
int suppress_log;
int bandwidth;
time_t start_time;
int wmp_client_id;
char protocol[16];
char method[16];
char url[128];
UINT8 buffer[IOBUFFER_MAX_SIZE];
UINT8 pbuffer[PACKET_MAX_SIZE];
} 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;
AVOutputFormat *fmt;
int nb_streams;
int prebuffer; /* Number of millseconds early to start */
time_t max_time;
int send_on_key;
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 */
int conns_served;
INT64 bytes_served;
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;
int nb_max_bandwidth;
int nb_bandwidth;
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);
fflush(logfile);
}
va_end(ap);
}
static void log_connection(HTTPContext *c)
{
char buf1[32], buf2[32], *p;
time_t ti;
if (c->suppress_log)
return;
/* 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 %lld %s\n",
buf1, buf2, c->method, c->url, c->protocol, (c->http_error ? c->http_error : 200), c->data_count,
c->stream ? c->stream->filename : "");
}
/* 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 = POLLIN;/* Maybe this will work */
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 */
log_connection(c);
close(c->fd);
if (c->fmt_in)
av_close_input_file(c->fmt_in);
*cp = c->next;
nb_bandwidth -= c->bandwidth;
av_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->stream)
c->stream->bytes_served += len;
c->data_count += 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 & (POLLIN | POLLERR | POLLHUP))
return -1;
/* nothing to do, we'll be waken up by incoming feed packets */
break;
default:
return -1;
}
return 0;
}
static int extract_rates(char *rates, int ratelen, const char *request)
{
const char *p;
for (p = request; *p && *p != '\r' && *p != '\n'; ) {
if (strncasecmp(p, "Pragma:", 7) == 0) {
const char *q = p + 7;
while (*q && *q != '\n' && isspace(*q))
q++;
if (strncasecmp(q, "stream-switch-entry=", 20) == 0) {
int stream_no;
int rate_no;
q += 20;
memset(rates, 0, ratelen);
while (1) {
while (*q && *q != '\n' && *q != ':')
q++;
if (sscanf(q, ":%d:%d", &stream_no, &rate_no) != 2) {
break;
}
stream_no--;
if (stream_no < ratelen && stream_no >= 0) {
rates[stream_no] = rate_no;
}
while (*q && *q != '\n' && !isspace(*q))
q++;
}
return 1;
}
}
p = strchr(p, '\n');
if (!p)
break;
p++;
}
return 0;
}
static FFStream *find_optimal_stream(FFStream *req, char *rates)
{
int i;
FFStream *rover;
int req_bitrate = 0;
int want_bitrate = 0;
FFStream *best = 0;
int best_bitrate;
for (i = 0; i < req->nb_streams; i++) {
AVCodecContext *codec = &req->streams[i]->codec;
req_bitrate += codec->bit_rate;
switch(rates[i]) {
case 0:
want_bitrate += codec->bit_rate;
break;
case 1:
want_bitrate += codec->bit_rate / 2;
break;
case 2:
break;
}
}
best_bitrate = req_bitrate;
if (best_bitrate <= want_bitrate)
return 0; /* We are OK */
/* Now we have the actual rates that we can use. Now find the stream that uses most of it! */
for (rover = first_stream; rover; rover = rover->next) {
if (rover->feed != req->feed ||
rover->fmt != req->fmt ||
rover->nb_streams != req->nb_streams ||
rover == req) {
continue;
}
/* Now see if the codecs all match */
for (i = 0; i < req->nb_streams; i++) {
AVCodecContext *codec = &req->streams[i]->codec;
AVCodecContext *rovercodec = &rover->streams[i]->codec;
if (rovercodec->codec_id != codec->codec_id ||
rovercodec->sample_rate != codec->sample_rate) {
/* Does the video width and height have to match?? */
break;
}
}
if (i == req->nb_streams) {
/* The rovercodec is another possible stream */
int rover_bitrate = 0;
for (i = 0; i < req->nb_streams; i++) {
AVCodecContext *codec = &rover->streams[i]->codec;
rover_bitrate += codec->bit_rate;
}
/* We want to choose the largest rover_bitrate <= want_bitrate, or the smallest
* rover_bitrate if none <= want_bitrate
*/
if (rover_bitrate <= want_bitrate) {
if (best_bitrate > want_bitrate || rover_bitrate > best_bitrate) {
best_bitrate = rover_bitrate;
best = rover;
}
} else {
if (rover_bitrate < best_bitrate) {
best_bitrate = rover_bitrate;
best = rover;
}
}
}
}
return best;
}
/* parse http request and prepare header */
static int http_parse_request(HTTPContext *c)
{
char *p;
int post;
int doing_asx;
int doing_ram;
char cmd[32];
char info[1024], *filename;
char url[1024], *q;
char protocol[32];
char msg[1024];
const char *mime_type;
FFStream *stream;
int i;
char ratebuf[32];
p = c->buffer;
q = cmd;
while (!isspace(*p) && *p != '\0') {
if ((q - cmd) < sizeof(cmd) - 1)
*q++ = *p;
p++;
}
*q = '\0';
pstrcpy(c->method, sizeof(c->method), cmd);
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';
pstrcpy(c->url, sizeof(c->url), url);
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;
pstrcpy(c->protocol, sizeof(c->protocol), protocol);
/* find the filename and the optional info string in the request */
p = url;
if (*p == '/')
p++;
filename = p;
p = strchr(p, '?');
if (p) {
pstrcpy(info, sizeof(info), p);
*p = '\0';
} else {
info[0] = '\0';
}
if (strlen(filename) > 4 && strcmp(".asx", filename + strlen(filename) - 4) == 0) {
doing_asx = 1;
filename[strlen(filename)-1] = 'f';
} else {
doing_asx = 0;
}
if (strlen(filename) > 4 &&
(strcmp(".rpm", filename + strlen(filename) - 4) == 0 ||
strcmp(".ram", filename + strlen(filename) - 4) == 0)) {
doing_ram = 1;
strcpy(filename + strlen(filename)-2, "m");
} else {
doing_ram = 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;
}
/* If this is WMP, get the rate information */
if (extract_rates(ratebuf, sizeof(ratebuf), c->buffer)) {
FFStream *optimal;
optimal = find_optimal_stream(stream, ratebuf);
if (optimal)
stream = optimal;
}
if (post == 0 && stream->stream_type == STREAM_TYPE_LIVE) {
/* See if we meet the bandwidth requirements */
for(i=0;i<stream->nb_streams;i++) {
AVStream *st = stream->streams[i];
switch(st->codec.codec_type) {
case CODEC_TYPE_AUDIO:
c->bandwidth += st->codec.bit_rate;
break;
case CODEC_TYPE_VIDEO:
c->bandwidth += st->codec.bit_rate;
break;
default:
av_abort();
}
}
}
c->bandwidth /= 1000;
nb_bandwidth += c->bandwidth;
if (post == 0 && nb_max_bandwidth < nb_bandwidth) {
c->http_error = 200;
q = c->buffer;
q += sprintf(q, "HTTP/1.0 200 Server too busy\r\n");
q += sprintf(q, "Content-type: text/html\r\n");
q += sprintf(q, "\r\n");
q += sprintf(q, "<html><head><title>Too busy</title></head><body>\r\n");
q += sprintf(q, "The server is too busy to serve your request at this time.<p>\r\n");
q += sprintf(q, "The bandwidth being served (including your stream) is %dkbit/sec, and this exceeds the limit of %dkbit/sec\r\n",
nb_bandwidth, nb_max_bandwidth);
q += sprintf(q, "</body></html>\r\n");
/* prepare output buffer */
c->buffer_ptr = c->buffer;
c->buffer_end = q;
c->state = HTTPSTATE_SEND_HEADER;
return 0;
}
if (doing_asx || doing_ram) {
char *hostinfo = 0;
for (p = c->buffer; *p && *p != '\r' && *p != '\n'; ) {
if (strncasecmp(p, "Host:", 5) == 0) {
hostinfo = p + 5;
break;
}
p = strchr(p, '\n');
if (!p)
break;
p++;
}
if (hostinfo) {
char *eoh;
char hostbuf[260];
while (isspace(*hostinfo))
hostinfo++;
eoh = strchr(hostinfo, '\n');
if (eoh) {
if (eoh[-1] == '\r')
eoh--;
if (eoh - hostinfo < sizeof(hostbuf) - 1) {
memcpy(hostbuf, hostinfo, eoh - hostinfo);
hostbuf[eoh - hostinfo] = 0;
c->http_error = 200;
q = c->buffer;
if (doing_asx) {
q += sprintf(q, "HTTP/1.0 200 ASX Follows\r\n");
q += sprintf(q, "Content-type: video/x-ms-asf\r\n");
q += sprintf(q, "\r\n");
q += sprintf(q, "<ASX Version=\"3\">\r\n");
q += sprintf(q, "<!-- Autogenerated by ffserver -->\r\n");
q += sprintf(q, "<ENTRY><REF HREF=\"http://%s/%s%s\"/></ENTRY>\r\n",
hostbuf, filename, info);
q += sprintf(q, "</ASX>\r\n");
} else if (doing_ram) {
q += sprintf(q, "HTTP/1.0 200 RAM Follows\r\n");
q += sprintf(q, "Content-type: audio/x-pn-realaudio\r\n");
q += sprintf(q, "\r\n");
q += sprintf(q, "# Autogenerated by ffserver\r\n");
q += sprintf(q, "http://%s/%s%s\r\n",
hostbuf, filename, info);
} else
av_abort();
/* prepare output buffer */
c->buffer_ptr = c->buffer;
c->buffer_end = q;
c->state = HTTPSTATE_SEND_HEADER;
return 0;
}
}
}
sprintf(msg, "ASX/RAM file not handled");
goto send_error;
}
c->stream = stream;
stream->conns_served++;
/* XXX: add there authenticate and IP match */
if (post) {
/* if post, it means a feed is being sent */
if (!stream->is_feed) {
/* However it might be a status report from WMP! Lets log the data
* as it might come in handy one day
*/
char *logline = 0;
int client_id = 0;
for (p = c->buffer; *p && *p != '\r' && *p != '\n'; ) {
if (strncasecmp(p, "Pragma: log-line=", 17) == 0) {
logline = p;
break;
}
if (strncasecmp(p, "Pragma: client-id=", 18) == 0) {
client_id = strtol(p + 18, 0, 10);
}
p = strchr(p, '\n');
if (!p)
break;
p++;
}
if (logline) {
char *eol = strchr(logline, '\n');
logline += 17;
if (eol) {
if (eol[-1] == '\r')
eol--;
http_log("%.*s\n", eol - logline, logline);
c->suppress_log = 1;
}
}
#ifdef DEBUG
fprintf(stderr, "\nGot request:\n%s\n", c->buffer);
#endif
if (client_id && extract_rates(ratebuf, sizeof(ratebuf), c->buffer)) {
HTTPContext *wmpc;
/* Now we have to find the client_id */
for (wmpc = first_http_ctx; wmpc; wmpc = wmpc->next) {
if (wmpc->wmp_client_id == client_id)
break;
}
if (wmpc) {
FFStream *optimal;
optimal = find_optimal_stream(wmpc->stream, ratebuf);
if (optimal) {
fprintf(stderr, "Would like to switch stream from %s to %s\n",
wmpc->stream->filename, optimal->filename);
}
}
}
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;
}
#ifdef DEBUG
if (strcmp(stream->filename + strlen(stream->filename) - 4, ".asf") == 0) {
fprintf(stderr, "\nGot request:\n%s\n", c->buffer);
}
#endif
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, "Pragma: no-cache\r\n");
/* for asf, we need extra headers */
if (!strcmp(c->stream->fmt->name,"asf")) {
/* Need to allocate a client id */
static int wmp_session;
if (!wmp_session)
wmp_session = time(0) & 0xffffff;
c->wmp_client_id = ++wmp_session;
q += sprintf(q, "Server: Cougar 4.1.0.3923\r\nCache-Control: no-cache\r\nPragma: client-id=%d\r\nPragma: features=\"broadcast\"\r\n", c->wmp_client_id);
/* mime_type = "application/octet-stream"; */
/* video/x-ms-asf seems better -- netscape doesn't crash any more! */
mime_type = "video/x-ms-asf";
}
q += sprintf(q, "Content-Type: %s\r\n", mime_type);
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, "<H2>Available Streams</H2>\n");
q += sprintf(q, "<TABLE cellspacing=0 cellpadding=4>\n");
q += sprintf(q, "<TR><Th valign=top>Path<th align=left>Served<br>Conns<Th><br>kbytes<Th valign=top>Format<Th>Bit rate<br>kbits/s<Th align=left>Video<br>kbits/s<th><br>Codec<Th align=left>Audio<br>kbits/s<th><br>Codec<Th align=left valign=top>Feed\n");
stream = first_stream;
while (stream != NULL) {
char sfilename[1024];
char *eosf;
if (stream->feed != stream) {
pstrcpy(sfilename, sizeof(sfilename) - 1, stream->filename);
eosf = sfilename + strlen(sfilename);
if (eosf - sfilename >= 4) {
if (strcmp(eosf - 4, ".asf") == 0) {
strcpy(eosf - 4, ".asx");
} else if (strcmp(eosf - 3, ".rm") == 0) {
strcpy(eosf - 3, ".ram");
}
}
q += sprintf(q, "<TR><TD><A HREF=\"/%s\">%s</A> ",
sfilename, stream->filename);
q += sprintf(q, "<td align=right> %d <td align=right> %lld",
stream->conns_served, stream->bytes_served / 1000);
switch(stream->stream_type) {
case STREAM_TYPE_LIVE:
{
int audio_bit_rate = 0;
int video_bit_rate = 0;
char *audio_codec_name = "";
char *video_codec_name = "";
char *audio_codec_name_extra = "";
char *video_codec_name_extra = "";
for(i=0;i<stream->nb_streams;i++) {
AVStream *st = stream->streams[i];
AVCodec *codec = avcodec_find_encoder(st->codec.codec_id);
switch(st->codec.codec_type) {
case CODEC_TYPE_AUDIO:
audio_bit_rate += st->codec.bit_rate;
if (codec) {
if (*audio_codec_name)
audio_codec_name_extra = "...";
audio_codec_name = codec->name;
}
break;
case CODEC_TYPE_VIDEO:
video_bit_rate += st->codec.bit_rate;
if (codec) {
if (*video_codec_name)
video_codec_name_extra = "...";
video_codec_name = codec->name;
}
break;
default:
av_abort();
}
}
q += sprintf(q, "<TD align=center> %s <TD align=right> %d <TD align=right> %d <TD> %s %s <TD align=right> %d <TD> %s %s",
stream->fmt->name,
(audio_bit_rate + video_bit_rate) / 1000,
video_bit_rate / 1000, video_codec_name, video_codec_name_extra,
audio_bit_rate / 1000, audio_codec_name, audio_codec_name_extra);
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 align=center> - <TD align=right> - <TD align=right> - <td><td align=right> - <TD>\n");
break;
}
}
stream = stream->next;
}
q += sprintf(q, "</TABLE>\n");
stream = first_stream;
while (stream != NULL) {
if (stream->feed == stream) {
q += sprintf(q, "<h2>Feed %s</h2>", stream->filename);
q += sprintf(q, "<table cellspacing=0 cellpadding=4><tr><th>Stream<th>type<th>kbits/s<th align=left>codec<th align=left>Parameters\n");
for (i = 0; i < stream->nb_streams; i++) {
AVStream *st = stream->streams[i];
AVCodec *codec = avcodec_find_encoder(st->codec.codec_id);
char *type = "unknown";
char parameters[64];
parameters[0] = 0;
switch(st->codec.codec_type) {
case CODEC_TYPE_AUDIO:
type = "audio";
break;
case CODEC_TYPE_VIDEO:
type = "video";
sprintf(parameters, "%dx%d, q=%d-%d", st->codec.width, st->codec.height,
st->codec.qmin, st->codec.qmax);
break;
default:
av_abort();
}
q += sprintf(q, "<tr><td align=right>%d<td>%s<td align=right>%d<td>%s<td>%s\n",
i, type, st->codec.bit_rate/1000, codec ? codec->name : "", parameters);
}
q += sprintf(q, "</table>\n");
}
stream = stream->next;
}
#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, "<H2>Connection Status</H2>\n");
q += sprintf(q, "Number of connections: %d / %d<BR>\n",
nb_connections, nb_max_connections);
q += sprintf(q, "Bandwidth in use: %dk / %dk<BR>\n",
nb_bandwidth, nb_max_bandwidth);
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 && q < (char *) c->buffer + sizeof(c->buffer) - 2048) {
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 size=1 noshade>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 (c->buffer_ptr == c->buffer_end || !c->buffer_ptr)
c->buffer_ptr = c->buffer_end = c->buffer;
if (c->buffer_end - c->buffer + size > IOBUFFER_MAX_SIZE)
av_abort();
memcpy(c->buffer_end, buf, size);
c->buffer_end += 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 if (find_info_tag(buf, sizeof(buf), "buffer", info)) {
int prebuffer = strtol(buf, 0, 10);
stream_pos = gettime() - prebuffer * 1000000;
} else {
stream_pos = gettime() - c->stream->prebuffer * 1000;
}
} 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 */
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 Fabrice Bellard\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 Fabrice Bellard\n"
"This library is free software; you can redistribute it and/or\n"
"modify it under the terms of the GNU Lesser General Public\n"
"License as published by the Free Software Foundation; either\n"
"version 2 of the License, or (at your option) any later version.\n"
"\n"
"This library is distributed in the hope that it will be useful,\n"
"but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
"MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU\n"
"Lesser General Public License for more details.\n"
"\n"
"You should have received a copy of the GNU Lesser General Public\n"
"License along with this library; if not, write to the Free Software\n"
"Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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;
nb_max_bandwidth = 1000;
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 not start http server\n");
exit(1);
}
return 0;
}
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