*/
#define _BSD_SOURCE /* Needed for using struct ip_mreq with recent glibc */
-#define _DARWIN_C_SOURCE /* Needed for using IP_MULTICAST_TTL on OS X */
+
#include "avformat.h"
#include "avio_internal.h"
#include "libavutil/parseutils.h"
+#include "libavutil/fifo.h"
#include <unistd.h>
#include "internal.h"
#include "network.h"
#include "os_support.h"
#include "url.h"
+#include <pthread.h>
#include <sys/time.h>
#ifndef IPV6_ADD_MEMBERSHIP
struct sockaddr_storage dest_addr;
int dest_addr_len;
int is_connected;
+
+ /* Circular Buffer variables for use in UDP receive code */
+ int circular_buffer_size;
+ AVFifoBuffer *fifo;
+ int circular_buffer_available_max;
+ int circular_buffer_error;
+ pthread_t circular_buffer_thread;
} UDPContext;
#define UDP_TX_BUF_SIZE 32768
return s->udp_fd;
}
+static void *circular_buffer_task( void *_URLContext)
+{
+ URLContext *h = _URLContext;
+ UDPContext *s = h->priv_data;
+ fd_set rfds;
+ struct timeval tv;
+
+ for(;;) {
+ int left;
+ int ret;
+ int len;
+
+ if (url_interrupt_cb()) {
+ s->circular_buffer_error = EINTR;
+ return NULL;
+ }
+
+ FD_ZERO(&rfds);
+ FD_SET(s->udp_fd, &rfds);
+ tv.tv_sec = 1;
+ tv.tv_usec = 0;
+ ret = select(s->udp_fd + 1, &rfds, NULL, NULL, &tv);
+ if (ret < 0) {
+ if (ff_neterrno() == AVERROR(EINTR))
+ continue;
+ s->circular_buffer_error = EIO;
+ return NULL;
+ }
+
+ if (!(ret > 0 && FD_ISSET(s->udp_fd, &rfds)))
+ continue;
+
+ /* How much do we have left to the end of the buffer */
+ /* Whats the minimum we can read so that we dont comletely fill the buffer */
+ left = av_fifo_space(s->fifo);
+ left = FFMIN(left, s->fifo->end - s->fifo->wptr);
+
+ /* No Space left, error, what do we do now */
+ if( !left) {
+ av_log(h, AV_LOG_ERROR, "circular_buffer: OVERRUN\n");
+ s->circular_buffer_error = EIO;
+ return NULL;
+ }
+
+ len = recv(s->udp_fd, s->fifo->wptr, left, 0);
+ if (len < 0) {
+ if (ff_neterrno() != AVERROR(EAGAIN) && ff_neterrno() != AVERROR(EINTR)) {
+ s->circular_buffer_error = EIO;
+ return NULL;
+ }
+ }
+ s->fifo->wptr += len;
+ if (s->fifo->wptr >= s->fifo->end)
+ s->fifo->wptr = s->fifo->buffer;
+ s->fifo->wndx += len;
+ }
+
+ return NULL;
+}
+
/* put it in UDP context */
/* return non zero if error */
static int udp_open(URLContext *h, const char *uri, int flags)
h->is_streamed = 1;
h->max_packet_size = 1472;
- is_output = (flags & AVIO_FLAG_WRITE);
+ is_output = !(flags & AVIO_FLAG_READ);
s = av_mallocz(sizeof(UDPContext));
if (!s)
s->ttl = 16;
s->buffer_size = is_output ? UDP_TX_BUF_SIZE : UDP_MAX_PKT_SIZE;
+ s->circular_buffer_size = 7*188*4096;
+
p = strchr(uri, '?');
if (p) {
if (av_find_info_tag(buf, sizeof(buf), "reuse", p)) {
- const char *endptr=NULL;
+ char *endptr=NULL;
s->reuse_socket = strtol(buf, &endptr, 10);
/* assume if no digits were found it is a request to enable it */
if (buf == endptr)
if (av_find_info_tag(buf, sizeof(buf), "connect", p)) {
s->is_connected = strtol(buf, NULL, 10);
}
+ if (av_find_info_tag(buf, sizeof(buf), "buf_size", p)) {
+ s->circular_buffer_size = strtol(buf, NULL, 10)*188;
+ }
}
/* fill the dest addr */
/* XXX: fix av_url_split */
if (hostname[0] == '\0' || hostname[0] == '?') {
/* only accepts null hostname if input */
- if (flags & AVIO_FLAG_WRITE)
+ if (!(flags & AVIO_FLAG_READ))
goto fail;
} else {
if (ff_udp_set_remote_url(h, uri) < 0)
goto fail;
}
- if (s->is_multicast && !(h->flags & AVIO_FLAG_WRITE))
+ if (s->is_multicast && (h->flags & AVIO_FLAG_READ))
s->local_port = port;
udp_fd = udp_socket_create(s, &my_addr, &len);
if (udp_fd < 0)
/* the bind is needed to give a port to the socket now */
/* if multicast, try the multicast address bind first */
- if (s->is_multicast && !(h->flags & AVIO_FLAG_WRITE)) {
+ if (s->is_multicast && (h->flags & AVIO_FLAG_READ)) {
bind_ret = bind(udp_fd,(struct sockaddr *)&s->dest_addr, len);
}
/* bind to the local address if not multicast or if the multicast
s->local_port = udp_port(&my_addr, len);
if (s->is_multicast) {
- if (h->flags & AVIO_FLAG_WRITE) {
+ if (!(h->flags & AVIO_FLAG_READ)) {
/* output */
if (udp_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr) < 0)
goto fail;
}
s->udp_fd = udp_fd;
+
+ if (!is_output && s->circular_buffer_size) {
+ /* start the task going */
+ s->fifo = av_fifo_alloc(s->circular_buffer_size);
+ if (pthread_create(&s->circular_buffer_thread, NULL, circular_buffer_task, h)) {
+ av_log(h, AV_LOG_ERROR, "pthread_create failed\n");
+ goto fail;
+ }
+ }
+
return 0;
fail:
if (udp_fd >= 0)
closesocket(udp_fd);
+ av_fifo_free(s->fifo);
av_free(s);
return AVERROR(EIO);
}
{
UDPContext *s = h->priv_data;
int ret;
+ int avail;
+ int left;
+ fd_set rfds;
+ struct timeval tv;
+
+ if (s->fifo) {
+
+ do {
+ avail = av_fifo_size(s->fifo);
+ if (avail) { // >=size) {
+
+ // Maximum amount available
+ size = FFMIN( avail, size);
+ av_fifo_generic_read(s->fifo, buf, size, NULL);
+ return size;
+ }
+ else {
+ FD_ZERO(&rfds);
+ FD_SET(s->udp_fd, &rfds);
+ tv.tv_sec = 1;
+ tv.tv_usec = 0;
+ ret = select(s->udp_fd + 1, &rfds, NULL, NULL, &tv);
+ if (ret<0)
+ return ret;
+ }
+ } while( 1);
+ }
if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
ret = ff_network_wait_fd(s->udp_fd, 0);
return ret;
}
ret = recv(s->udp_fd, buf, size, 0);
+
return ret < 0 ? ff_neterrno() : ret;
}
{
UDPContext *s = h->priv_data;
- if (s->is_multicast && !(h->flags & AVIO_FLAG_WRITE))
+ if (s->is_multicast && (h->flags & AVIO_FLAG_READ))
udp_leave_multicast_group(s->udp_fd, (struct sockaddr *)&s->dest_addr);
closesocket(s->udp_fd);
+ av_log( h, AV_LOG_INFO, "circular_buffer_info max:%d%%\r\n", (s->circular_buffer_available_max*100)/s->circular_buffer_size);
+ av_fifo_free(s->fifo);
av_free(s);
return 0;
}
projects / ffmpeg / blobdiff