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FFmpeg/ffserver.c

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/*
* Multiple format streaming server
* Copyright (c) 2000 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 <linux/videodev.h>
#include <linux/soundcard.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/poll.h>
#include <errno.h>
#include <sys/time.h>
#include <getopt.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <ctype.h>
#include <pthread.h>
#include "mpegenc.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,
};
enum MasterState {
MASTERSTATE_RECEIVE_HEADER,
MASTERSTATE_RECEIVE_DATA,
};
#define IOBUFFER_MAX_SIZE 16384
#define FIFO_MAX_SIZE (1024*1024)
/* 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)
#define MASTER_CONNECT_TIMEOUT (10 * 1000)
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;
UINT8 *rptr; /* read pointer in the fifo */
int got_key_frame[2]; /* for each type */
long long data_count;
long long last_http_fifo_write_count; /* used to monitor overflow in the fifo */
/* 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_MASTER,
STREAM_TYPE_STATUS,
};
typedef struct FFStream {
enum StreamType stream_type;
char filename[1024];
AVFormat *fmt;
AVEncodeContext *audio_enc;
AVEncodeContext *video_enc;
struct FFStream *next;
} FFStream;
typedef struct FifoBuffer {
UINT8 *buffer;
UINT8 *rptr, *wptr, *end;
} FifoBuffer;
/* each codec is here */
typedef struct FFCodec {
struct FFCodec *next;
FifoBuffer fifo; /* for compression: one audio fifo per codec */
ReSampleContext resample; /* for audio resampling */
long long data_count;
float avg_frame_size; /* frame size averraged over last frames with exponential mean */
AVEncodeContext enc;
} FFCodec;
/* packet header */
typedef struct {
UINT8 codec_type;
UINT8 codec_id;
UINT8 data[4];
UINT16 bit_rate;
UINT16 payload_size;
} PacketHeader;
struct sockaddr_in my_addr;
char logfilename[1024];
HTTPContext *first_http_ctx;
FFStream *first_stream;
FFCodec *first_codec;
/* master state */
char master_url[1024];
enum MasterState master_state;
UINT8 *master_wptr;
int master_count;
long long http_fifo_write_count;
static FifoBuffer http_fifo;
static int handle_http(HTTPContext *c, long cur_time);
static int http_parse_request(HTTPContext *c);
static int http_send_data(HTTPContext *c);
static int master_receive(int fd);
static void compute_stats(HTTPContext *c);
int nb_max_connections;
int nb_connections;
/* fifo handling */
int fifo_init(FifoBuffer *f, int size)
{
f->buffer = malloc(size);
if (!f->buffer)
return -1;
f->end = f->buffer + size;
f->wptr = f->rptr = f->buffer;
return 0;
}
static int fifo_size(FifoBuffer *f, UINT8 *rptr)
{
int size;
if (f->wptr >= rptr) {
size = f->wptr - rptr;
} else {
size = (f->end - rptr) + (f->wptr - f->buffer);
}
return size;
}
/* get data from the fifo (return -1 if not enough data) */
static int fifo_read(FifoBuffer *f, UINT8 *buf, int buf_size, UINT8 **rptr_ptr)
{
UINT8 *rptr = *rptr_ptr;
int size, len;
if (f->wptr >= rptr) {
size = f->wptr - rptr;
} else {
size = (f->end - rptr) + (f->wptr - f->buffer);
}
if (size < buf_size)
return -1;
while (buf_size > 0) {
len = f->end - rptr;
if (len > buf_size)
len = buf_size;
memcpy(buf, rptr, len);
buf += len;
rptr += len;
if (rptr >= f->end)
rptr = f->buffer;
buf_size -= len;
}
*rptr_ptr = rptr;
return 0;
}
static void fifo_write(FifoBuffer *f, UINT8 *buf, int size, UINT8 **wptr_ptr)
{
int len;
UINT8 *wptr;
wptr = *wptr_ptr;
while (size > 0) {
len = f->end - wptr;
if (len > size)
len = size;
memcpy(wptr, buf, len);
wptr += len;
if (wptr >= f->end)
wptr = f->buffer;
buf += len;
size -= len;
}
*wptr_ptr = wptr;
}
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);
}
/* connect to url 'url' and return the connected socket ready to read data */
static int url_get(const char *url)
{
struct sockaddr_in dest_addr;
struct hostent *h;
int s, port, size, line_size, len;
char hostname[1024], *q;
const char *p, *path;
char req[1024];
unsigned char ch;
if (!strstart(url, "http://", &p))
return -1;
q = hostname;
while (*p != ':' && *p != '\0' && *p != '/') {
if ((q - hostname) < (sizeof(hostname) - 1))
*q++ = *p;
p++;
}
port = 80;
if (*p == ':') {
p++;
port = strtol(p, (char **)&p, 10);
}
path = p;
dest_addr.sin_family = AF_INET;
dest_addr.sin_port = htons(port);
if (!inet_aton(hostname, &dest_addr.sin_addr)) {
if ((h = gethostbyname(hostname)) == NULL)
return -1;
memcpy(&dest_addr.sin_addr, h->h_addr, sizeof(dest_addr.sin_addr));
}
s=socket(AF_INET, SOCK_STREAM, 0);
if (s < 0)
return -1;
if (connect(s, (struct sockaddr *)&dest_addr, sizeof(dest_addr)) < 0) {
fail:
close(s);
return -1;
}
/* send http request */
snprintf(req, sizeof(req), "GET %s HTTP/1.0\r\n\r\n", path);
p = req;
size = strlen(req);
while (size > 0) {
len = write(s, p, size);
if (len == -1) {
if (errno != EAGAIN && errno != EINTR)
goto fail;
} else {
size -= len;
p += len;
}
}
/* receive answer */
line_size = 0;
for(;;) {
len = read(s, &ch, 1);
if (len == -1) {
if (errno != EAGAIN && errno != EINTR)
goto fail;
} else if (len == 0) {
goto fail;
} else {
if (ch == '\n') {
if (line_size == 0)
break;
line_size = 0;
} else if (ch != '\r') {
line_size++;
}
}
}
return s;
}
/* Each request is served by reading the input FIFO and by adding the
right format headers */
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;
int master_fd, master_timeout;
/* will try to connect to master as soon as possible */
master_fd = -1;
master_timeout = gettime_ms();
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++;
if (master_fd >= 0) {
poll_entry->fd = master_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;
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);
*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, &from_addr, &len);
if (fd >= 0) {
fcntl(fd, F_SETFL, O_NONBLOCK);
/* XXX: should output a warning page when comming
close to the connection limit */
if (nb_connections >= nb_max_connections) {
close(fd);
} else {
/* add a new connection */
c = malloc(sizeof(HTTPContext));
memset(c, 0, sizeof(*c));
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++;
/* master events */
if (poll_entry->revents & POLLIN) {
if (master_receive(master_fd) < 0) {
close(master_fd);
master_fd = -1;
}
}
/* master (re)connection handling */
if (master_url[0] != '\0' &&
master_fd < 0 && (master_timeout - cur_time) <= 0) {
master_fd = url_get(master_url);
if (master_fd < 0) {
master_timeout = gettime_ms() + MASTER_CONNECT_TIMEOUT;
http_log("Connection to master: '%s' failed\n", master_url);
} else {
fcntl(master_fd, F_SETFL, O_NONBLOCK);
master_state = MASTERSTATE_RECEIVE_HEADER;
master_count = sizeof(PacketHeader);
master_wptr = http_fifo.wptr;
}
}
}
}
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;
default:
return -1;
}
return 0;
}
/* parse http request and prepare header */
static int http_parse_request(HTTPContext *c)
{
const char *p;
char cmd[32];
char url[1024], *q;
char protocol[32];
char msg[1024];
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"))
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 in the request */
p = url;
if (*p == '/')
p++;
stream = first_stream;
while (stream != NULL) {
if (!strcmp(stream->filename, p))
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);
}
if (c->stream->stream_type == STREAM_TYPE_STATUS)
goto send_stats;
/* 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)
{
AVEncodeContext *enc;
HTTPContext *c1;
FFCodec *ffenc;
FFStream *stream;
float avg;
char buf[1024], *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\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;
if (stream->audio_enc)
audio_bit_rate = stream->audio_enc->bit_rate;
if (stream->video_enc)
video_bit_rate = stream->video_enc->bit_rate;
q += sprintf(q, "<TD> %s <TD> %d <TD> %d <TD> %d\n",
stream->fmt->name,
(audio_bit_rate + video_bit_rate) / 1000,
video_bit_rate / 1000, audio_bit_rate / 1000);
}
break;
case STREAM_TYPE_MASTER:
q += sprintf(q, "<TD> %s <TD> - <TD> - <TD> -\n",
"master");
break;
default:
q += sprintf(q, "<TD> - <TD> - <TD> - <TD> -\n");
break;
}
stream = stream->next;
}
q += sprintf(q, "</TABLE>\n");
/* codec status */
q += sprintf(q, "<H1>Codec Status</H1>\n");
q += sprintf(q, "<TABLE>\n");
q += sprintf(q, "<TR><TD>Parameters<TD>Frame count<TD>Size<TD>Avg bitrate (kbits/s)\n");
ffenc = first_codec;
while (ffenc != NULL) {
enc = &ffenc->enc;
avencoder_string(buf, sizeof(buf), enc);
avg = ffenc->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, ffenc->data_count, avg / 1000.0);
ffenc = ffenc->next;
}
q += sprintf(q, "</TABLE>\n");
/* exclude the stat connection */
q += sprintf(q, "Number of connections: %d / %d<BR>\n",
nb_connections, nb_max_connections);
/* connection status */
q += sprintf(q, "<H1>Connection Status</H1>\n");
q += sprintf(q, "<TABLE>\n");
q += sprintf(q, "<TR><TD>#<TD>File<TD>IP<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 <TD> %s <TD> %Ld\n",
i, c1->stream->filename, p, 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;
}
/* this headers are used to identify a packet for a given codec */
void mk_header(PacketHeader *h, AVEncodeContext *c, int payload_size)
{
h->codec_type = c->codec->type;
h->codec_id = c->codec->id;
h->bit_rate = htons(c->bit_rate / 1000);
switch(c->codec->type) {
case CODEC_TYPE_VIDEO:
h->data[0] = c->rate;
h->data[1] = c->width / 16;
h->data[2] = c->height / 16;
break;
case CODEC_TYPE_AUDIO:
h->data[0] = c->rate / 1000;
h->data[1] = c->channels;
h->data[2] = 0;
break;
}
h->data[3] = c->key_frame;
h->payload_size = htons(payload_size);
}
int test_header(PacketHeader *h, AVEncodeContext *c)
{
if (!c)
return 0;
if (h->codec_type == c->codec->type &&
h->codec_id == c->codec->id &&
h->bit_rate == htons(c->bit_rate / 1000)) {
switch(c->codec->type) {
case CODEC_TYPE_VIDEO:
if (h->data[0] == c->rate &&
h->data[1] == (c->width / 16) &&
h->data[2] == (c->height / 16))
goto found;
break;
case CODEC_TYPE_AUDIO:
if (h->data[0] == (c->rate / 1000) &&
(h->data[1] == c->channels))
goto found;
break;
}
}
return 0;
found:
c->frame_number++;
c->key_frame = h->data[3];
return 1;
}
static int http_prepare_data(HTTPContext *c)
{
PacketHeader hdr;
UINT8 *start_rptr, *payload;
int payload_size, ret;
long long fifo_total_size;
switch(c->state) {
case HTTPSTATE_SEND_DATA_HEADER:
if (c->stream->stream_type != STREAM_TYPE_MASTER) {
memset(&c->fmt_ctx, 0, sizeof(c->fmt_ctx));
c->fmt_ctx.format = c->stream->fmt;
if (c->fmt_ctx.format->audio_codec != CODEC_ID_NONE) {
/* create a fake new codec instance */
c->fmt_ctx.audio_enc = malloc(sizeof(AVEncodeContext));
memcpy(c->fmt_ctx.audio_enc, c->stream->audio_enc,
sizeof(AVEncodeContext));
c->fmt_ctx.audio_enc->frame_number = 0;
}
if (c->fmt_ctx.format->video_codec != CODEC_ID_NONE) {
c->fmt_ctx.video_enc = malloc(sizeof(AVEncodeContext));
memcpy(c->fmt_ctx.video_enc, c->stream->video_enc,
sizeof(AVEncodeContext));
c->fmt_ctx.video_enc->frame_number = 0;
}
init_put_byte(&c->fmt_ctx.pb, c->buffer, IOBUFFER_MAX_SIZE,
c, http_write_packet, NULL);
c->fmt_ctx.is_streamed = 1;
c->got_key_frame[0] = 0;
c->got_key_frame[1] = 0;
/* prepare header */
c->fmt_ctx.format->write_header(&c->fmt_ctx);
}
c->state = HTTPSTATE_SEND_DATA;
c->last_packet_sent = 0;
c->rptr = http_fifo.wptr;
c->last_http_fifo_write_count = http_fifo_write_count;
break;
case HTTPSTATE_SEND_DATA:
/* find a new packet */
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] = 0;
c->got_key_frame[1] = 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;
if (test_header(&hdr, c->fmt_ctx.audio_enc)) {
/* only begin sending when got a key frame */
if (c->fmt_ctx.audio_enc->key_frame)
c->got_key_frame[1] = 1;
if (c->got_key_frame[1]) {
ret = c->fmt_ctx.format->write_audio_frame(&c->fmt_ctx,
payload, payload_size);
}
} else if (test_header(&hdr, c->fmt_ctx.video_enc)) {
if (c->fmt_ctx.video_enc->key_frame)
c->got_key_frame[0] = 1;
if (c->got_key_frame[0]) {
ret = c->fmt_ctx.format->write_video_picture(&c->fmt_ctx,
payload, payload_size);
}
}
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);
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;
while (c->buffer_ptr >= c->buffer_end) {
if (http_prepare_data(c) < 0)
return -1;
}
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 master_receive(int fd)
{
int len, size;
FifoBuffer *f = &http_fifo;
UINT8 *rptr;
size = f->end - f->wptr;
if (size > master_count)
size = master_count;
len = read(fd, f->wptr, size);
if (len == -1) {
if (errno != EAGAIN && errno != EINTR)
return -1;
} else if (len == 0) {
return -1;
} else {
master_wptr += len;
if (master_wptr >= f->end)
master_wptr = f->buffer;
master_count -= len;
if (master_count == 0) {
if (master_state == MASTERSTATE_RECEIVE_HEADER) {
/* XXX: use generic fifo read to extract packet header */
rptr = master_wptr;
if (rptr == f->buffer)
rptr = f->end - 1;
else
rptr--;
master_count = *rptr;
if (rptr == f->buffer)
rptr = f->end - 1;
else
rptr--;
master_count |= *rptr << 8;
master_state = MASTERSTATE_RECEIVE_DATA;
} else {
/* update fifo wptr */
f->wptr = master_wptr;
master_state = MASTERSTATE_RECEIVE_HEADER;
}
}
}
return 0;
}
static void get_arg(char *buf, int buf_size, const char **pp)
{
const char *p;
char *q;
p = *pp;
while (isspace(*p)) p++;
q = buf;
while (!isspace(*p) && *p != '\0') {
if ((q - buf) < buf_size - 1)
*q++ = *p;
p++;
}
*q = '\0';
*pp = p;
}
/* add a codec and check if it does not already exists */
AVEncodeContext *add_codec(int codec_id,
AVEncodeContext *av)
{
AVEncoder *codec;
FFCodec *ctx, **pctx;
AVEncodeContext *av1;
codec = avencoder_find(codec_id);
if (!codec)
return NULL;
/* compute default parameters */
av->codec = codec;
switch(codec->type) {
case CODEC_TYPE_AUDIO:
if (av->bit_rate == 0)
av->bit_rate = 64000;
if (av->rate == 0)
av->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->rate == 0)
av->rate = 5;
if (av->width == 0 || av->height == 0) {
av->width = 160;
av->height = 128;
}
break;
}
/* find if the codec already exists */
pctx = &first_codec;
while (*pctx != NULL) {
av1 = &(*pctx)->enc;
if (av1->codec == av->codec &&
av1->bit_rate == av->bit_rate &&
av1->rate == av->rate) {
switch(av->codec->type) {
case CODEC_TYPE_AUDIO:
if (av1->channels == av->channels)
goto found;
break;
case CODEC_TYPE_VIDEO:
if (av1->width == av->width &&
av1->height == av->height &&
av1->gop_size == av->gop_size)
goto found;
break;
}
}
pctx = &(*pctx)->next;
}
ctx = malloc(sizeof(FFCodec));
if (!ctx)
return NULL;
memset(ctx, 0, sizeof(FFCodec));
*pctx = ctx;
memcpy(&ctx->enc, av, sizeof(AVEncodeContext));
return &ctx->enc;
found:
ctx = *pctx;
return &ctx->enc;
}
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;
AVEncodeContext audio_enc, video_enc;
f = fopen(filename, "r");
if (!f) {
perror(filename);
return -1;
}
errors = 0;
line_num = 0;
first_stream = NULL;
first_codec = NULL;
last_stream = &first_stream;
stream = NULL;
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, "MasterServer")) {
get_arg(master_url, sizeof(master_url), &p);
if (!strstart(master_url, "http://", NULL)) {
fprintf(stderr, "%s:%d: Invalid URL for master server: %s\n",
filename, line_num, master_url);
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, "<Stream")) {
char *q;
if (stream) {
fprintf(stderr, "%s:%d: Already in a stream tag\n",
filename, line_num);
} else {
stream = malloc(sizeof(FFStream));
memset(stream, 0, 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(AVEncodeContext));
memset(&video_enc, 0, sizeof(AVEncodeContext));
}
} else if (!strcasecmp(cmd, "Format")) {
get_arg(arg, sizeof(arg), &p);
if (!strcmp(arg, "master")) {
stream->stream_type = STREAM_TYPE_MASTER;
stream->fmt = NULL;
} else if (!strcmp(arg, "status")) {
stream->stream_type = STREAM_TYPE_STATUS;
stream->fmt = NULL;
} else {
stream->stream_type = STREAM_TYPE_LIVE;
stream->fmt = guess_format(arg, NULL, NULL);
if (!stream->fmt) {
fprintf(stderr, "%s:%d: Unknown Format: %s\n",
filename, line_num, arg);
errors++;
}
}
} 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.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, "VideoFrameRate")) {
get_arg(arg, sizeof(arg), &p);
if (stream) {
video_enc.rate = atoi(arg);
}
} 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, "</Stream>")) {
if (!stream) {
fprintf(stderr, "%s:%d: No corresponding <Stream> for </Stream>\n",
filename, line_num);
errors++;
}
if (stream->fmt) {
if (stream->fmt->audio_codec != CODEC_ID_NONE) {
stream->audio_enc = add_codec(stream->fmt->audio_codec,
&audio_enc);
}
if (stream->fmt->video_codec != CODEC_ID_NONE)
stream->video_enc = add_codec(stream->fmt->video_codec,
&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;
}
static void write_packet(FFCodec *ffenc,
UINT8 *buf, int size)
{
PacketHeader hdr;
AVEncodeContext *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);
}
#define AUDIO_FIFO_SIZE 8192
int av_grab(void)
{
UINT8 audio_buf[AUDIO_FIFO_SIZE/2];
UINT8 audio_buf1[AUDIO_FIFO_SIZE/2];
UINT8 audio_out[AUDIO_FIFO_SIZE/2];
UINT8 video_buffer[128*1024];
char buf[256];
short *samples;
int ret;
int audio_fd;
FFCodec *ffenc;
AVEncodeContext *enc;
int frame_size, frame_bytes;
int use_audio, use_video;
int frame_rate, sample_rate, channels;
int width, height, frame_number;
UINT8 *picture[3];
use_audio = 0;
use_video = 0;
frame_rate = 0;
sample_rate = 0;
frame_size = 0;
channels = 1;
width = 0;
height = 0;
frame_number = 0;
ffenc = first_codec;
while (ffenc != NULL) {
enc = &ffenc->enc;
avencoder_string(buf, sizeof(buf), enc);
fprintf(stderr, " %s\n", buf);
if (avencoder_open(enc, enc->codec) < 0) {
fprintf(stderr, "Incorrect encode parameters\n");
return -1;
}
switch(enc->codec->type) {
case CODEC_TYPE_AUDIO:
use_audio = 1;
if (enc->rate > sample_rate)
sample_rate = enc->rate;
if (enc->frame_size > frame_size)
frame_size = enc->frame_size;
if (enc->channels > channels)
channels = enc->channels;
fifo_init(&ffenc->fifo, AUDIO_FIFO_SIZE);
break;
case CODEC_TYPE_VIDEO:
use_video = 1;
if (enc->rate > frame_rate)
frame_rate = enc->rate;
if (enc->width > width)
width = enc->width;
if (enc->height > height)
height = enc->height;
break;
}
ffenc = ffenc->next;
}
/* audio */
samples = NULL;
audio_fd = -1;
if (use_audio) {
printf("Audio sampling: %d Hz, %s\n",
sample_rate, channels == 2 ? "stereo" : "mono");
audio_fd = audio_open(sample_rate, channels);
if (audio_fd < 0) {
fprintf(stderr, "Could not open audio device\n");
exit(1);
}
}
ffenc = first_codec;
while (ffenc != NULL) {
enc = &ffenc->enc;
if (enc->codec->type == CODEC_TYPE_AUDIO &&
(enc->channels != channels ||
enc->rate != sample_rate)) {
audio_resample_init(&ffenc->resample, enc->channels, channels,
enc->rate, sample_rate);
}
ffenc = ffenc->next;
}
/* video */
if (use_video) {
printf("Video sampling: %dx%d, %d fps\n",
width, height, frame_rate);
ret = v4l_init(frame_rate, width, height);
if (ret < 0) {
fprintf(stderr,"Could not init video 4 linux capture\n");
exit(1);
}
}
for(;;) {
/* read & compress audio frames */
if (use_audio) {
int ret, nb_samples, nb_samples_out;
UINT8 *buftmp;
for(;;) {
ret = read(audio_fd, audio_buf, AUDIO_FIFO_SIZE/2);
if (ret <= 0)
break;
/* fill each codec fifo by doing the right sample
rate conversion. This is not optimal because we
do too much work, but it is easy to do */
nb_samples = ret / (channels * 2);
ffenc = first_codec;
while (ffenc != NULL) {
enc = &ffenc->enc;
if (enc->codec->type == CODEC_TYPE_AUDIO) {
/* rate & stereo convertion */
if (enc->channels == channels &&
enc->rate == sample_rate) {
buftmp = audio_buf;
nb_samples_out = nb_samples;
} else {
buftmp = audio_buf1;
nb_samples_out = audio_resample(&ffenc->resample,
(short *)buftmp, (short *)audio_buf,
nb_samples);
}
fifo_write(&ffenc->fifo, buftmp, nb_samples_out * enc->channels * 2,
&ffenc->fifo.wptr);
}
ffenc = ffenc->next;
}
/* compress as many frame as possible with each audio codec */
ffenc = first_codec;
while (ffenc != NULL) {
enc = &ffenc->enc;
if (enc->codec->type == CODEC_TYPE_AUDIO) {
frame_bytes = enc->frame_size * 2 * enc->channels;
while (fifo_read(&ffenc->fifo, audio_buf, frame_bytes, &ffenc->fifo.rptr) == 0) {
ret = avencoder_encode(enc,
audio_out, sizeof(audio_out), audio_buf);
write_packet(ffenc, audio_out, ret);
}
}
ffenc = ffenc->next;
}
}
}
if (use_video) {
ret = v4l_read_picture (picture, width, height,
frame_number);
if (ret < 0)
break;
ffenc = first_codec;
while (ffenc != NULL) {
enc = &ffenc->enc;
if (enc->codec->type == CODEC_TYPE_VIDEO) {
int n1, n2;
/* feed each codec with its requested frame rate */
n1 = (frame_number * enc->rate) / frame_rate;
n2 = ((frame_number + 1) * enc->rate) / frame_rate;
if (n2 > n1) {
ret = avencoder_encode(enc, video_buffer, sizeof(video_buffer), picture);
write_packet(ffenc, video_buffer, ret);
}
}
ffenc = ffenc->next;
}
frame_number++;
}
}
ffenc = first_codec;
while (ffenc != NULL) {
enc = &ffenc->enc;
avencoder_close(enc);
ffenc = ffenc->next;
}
close(audio_fd);
return 0;
}
void help(void)
{
printf("ffserver version 1.0, Copyright (c) 2000 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 1.0\n"
"Copyright (c) 2000 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)
{
pthread_t http_server_tid;
const char *config_filename;
int c;
/* codecs */
register_avencoder(&ac3_encoder);
register_avencoder(&mp2_encoder);
register_avencoder(&mpeg1video_encoder);
register_avencoder(&h263_encoder);
register_avencoder(&rv10_encoder);
register_avencoder(&mjpeg_encoder);
/* audio video formats */
register_avformat(&mp2_format);
register_avformat(&ac3_format);
register_avformat(&mpeg_mux_format);
register_avformat(&mpeg1video_format);
register_avformat(&h263_format);
register_avformat(&rm_format);
register_avformat(&ra_format);
register_avformat(&asf_format);
register_avformat(&mpjpeg_format);
register_avformat(&jpeg_format);
register_avformat(&swf_format);
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);
}
/* open log file if needed */
if (logfilename[0] != '\0') {
if (!strcmp(logfilename, "-"))
logfile = stdout;
else
logfile = fopen(logfilename, "w");
}
/* init fifo */
http_fifo_write_count = 0;
if (fifo_init(&http_fifo, FIFO_MAX_SIZE) < 0) {
fprintf(stderr, "Could not allow receive fifo\n");
exit(1);
}
if (master_url[0] == '\0') {
/* no master server: we grab ourself */
/* launch server thread */
if (pthread_create(&http_server_tid, NULL,
http_server_thread, NULL) != 0) {
fprintf(stderr, "Could not create http server thread\n");
exit(1);
}
/* launch the audio / video grab */
if (av_grab() < 0) {
fprintf(stderr, "Could not start audio/video grab\n");
exit(1);
}
} else {
/* master server : no thread are needed */
if (http_server(my_addr) < 0) {
fprintf(stderr, "Could start http server\n");
exit(1);
}
}
return 0;
}