* Unbuffered io for ffmpeg system
* Copyright (c) 2001 Fabrice Bellard
*
- * This library is free software; you can redistribute it and/or
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * FFmpeg 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
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+
+/* needed for usleep() */
+#define _XOPEN_SOURCE 600
+#include <unistd.h>
+#include "libavutil/avstring.h"
+#include "libavcodec/opt.h"
+#include "os_support.h"
#include "avformat.h"
+#if LIBAVFORMAT_VERSION_MAJOR >= 53
+/** @name Logging context. */
+/*@{*/
+static const char *urlcontext_to_name(void *ptr)
+{
+ URLContext *h = (URLContext *)ptr;
+ if(h->prot) return h->prot->name;
+ else return "NULL";
+}
+static const AVOption options[] = {{NULL}};
+static const AVClass urlcontext_class =
+ { "URLContext", urlcontext_to_name, options };
+/*@}*/
+#endif
+
static int default_interrupt_cb(void);
URLProtocol *first_protocol = NULL;
URLInterruptCB *url_interrupt_cb = default_interrupt_cb;
-int register_protocol(URLProtocol *protocol)
+URLProtocol *av_protocol_next(URLProtocol *p)
+{
+ if(p) return p->next;
+ else return first_protocol;
+}
+
+int av_register_protocol(URLProtocol *protocol)
{
URLProtocol **p;
p = &first_protocol;
return 0;
}
-int url_open(URLContext **puc, const char *filename, int flags)
+#if LIBAVFORMAT_VERSION_MAJOR < 53
+int register_protocol(URLProtocol *protocol)
+{
+ return av_register_protocol(protocol);
+}
+#endif
+
+int url_open_protocol (URLContext **puc, struct URLProtocol *up,
+ const char *filename, int flags)
{
URLContext *uc;
+ int err;
+
+ uc = av_mallocz(sizeof(URLContext) + strlen(filename) + 1);
+ if (!uc) {
+ err = AVERROR(ENOMEM);
+ goto fail;
+ }
+#if LIBAVFORMAT_VERSION_MAJOR >= 53
+ uc->av_class = &urlcontext_class;
+#endif
+ uc->filename = (char *) &uc[1];
+ strcpy(uc->filename, filename);
+ uc->prot = up;
+ uc->flags = flags;
+ uc->is_streamed = 0; /* default = not streamed */
+ uc->max_packet_size = 0; /* default: stream file */
+ err = up->url_open(uc, filename, flags);
+ if (err < 0) {
+ av_free(uc);
+ *puc = NULL;
+ return err;
+ }
+
+ //We must be careful here as url_seek() could be slow, for example for http
+ if( (flags & (URL_WRONLY | URL_RDWR))
+ || !strcmp(up->name, "file"))
+ if(!uc->is_streamed && url_seek(uc, 0, SEEK_SET) < 0)
+ uc->is_streamed= 1;
+ *puc = uc;
+ return 0;
+ fail:
+ *puc = NULL;
+ return err;
+}
+
+int url_open(URLContext **puc, const char *filename, int flags)
+{
URLProtocol *up;
const char *p;
char proto_str[128], *q;
- int err;
p = filename;
q = proto_str;
p++;
}
/* if the protocol has length 1, we consider it is a dos drive */
- if (*p == '\0' || (q - proto_str) <= 1) {
+ if (*p == '\0' || is_dos_path(filename)) {
file_proto:
strcpy(proto_str, "file");
} else {
*q = '\0';
}
-
+
up = first_protocol;
while (up != NULL) {
if (!strcmp(proto_str, up->name))
- goto found;
+ return url_open_protocol (puc, up, filename, flags);
up = up->next;
}
- err = -ENOENT;
- goto fail;
- found:
- uc = av_malloc(sizeof(URLContext) + strlen(filename));
- if (!uc) {
- err = -ENOMEM;
- goto fail;
- }
- strcpy(uc->filename, filename);
- uc->prot = up;
- uc->flags = flags;
- uc->is_streamed = 0; /* default = not streamed */
- uc->max_packet_size = 0; /* default: stream file */
- err = up->url_open(uc, filename, flags);
- if (err < 0) {
- av_free(uc);
- *puc = NULL;
- return err;
- }
- *puc = uc;
- return 0;
- fail:
*puc = NULL;
- return err;
+ return AVERROR(ENOENT);
}
int url_read(URLContext *h, unsigned char *buf, int size)
{
int ret;
if (h->flags & URL_WRONLY)
- return AVERROR_IO;
+ return AVERROR(EIO);
ret = h->prot->url_read(h, buf, size);
return ret;
}
-#ifdef CONFIG_MUXERS
+int url_read_complete(URLContext *h, unsigned char *buf, int size)
+{
+ int ret, len;
+ int fast_retries = 5;
+
+ len = 0;
+ while (len < size) {
+ ret = url_read(h, buf+len, size-len);
+ if (ret == AVERROR(EAGAIN)) {
+ ret = 0;
+ if (fast_retries)
+ fast_retries--;
+ else
+ usleep(1000);
+ } else if (ret < 1)
+ return ret < 0 ? ret : len;
+ if (ret)
+ fast_retries = FFMAX(fast_retries, 2);
+ len += ret;
+ }
+ return len;
+}
+
int url_write(URLContext *h, unsigned char *buf, int size)
{
int ret;
if (!(h->flags & (URL_WRONLY | URL_RDWR)))
- return AVERROR_IO;
+ return AVERROR(EIO);
/* avoid sending too big packets */
if (h->max_packet_size && size > h->max_packet_size)
- return AVERROR_IO;
+ return AVERROR(EIO);
ret = h->prot->url_write(h, buf, size);
return ret;
}
-#endif //CONFIG_MUXERS
-offset_t url_seek(URLContext *h, offset_t pos, int whence)
+int64_t url_seek(URLContext *h, int64_t pos, int whence)
{
- offset_t ret;
+ int64_t ret;
if (!h->prot->url_seek)
- return -EPIPE;
+ return AVERROR(EPIPE);
ret = h->prot->url_seek(h, pos, whence);
return ret;
}
int url_close(URLContext *h)
{
- int ret;
+ int ret = 0;
+ if (!h) return 0; /* can happen when url_open fails */
- ret = h->prot->url_close(h);
+ if (h->prot->url_close)
+ ret = h->prot->url_close(h);
av_free(h);
return ret;
}
return 1;
}
-offset_t url_filesize(URLContext *h)
+int64_t url_filesize(URLContext *h)
{
- offset_t pos, size;
-
- pos = url_seek(h, 0, SEEK_CUR);
- size = url_seek(h, -1, SEEK_END)+1;
- url_seek(h, pos, SEEK_SET);
+ int64_t pos, size;
+
+ size= url_seek(h, 0, AVSEEK_SIZE);
+ if(size<0){
+ pos = url_seek(h, 0, SEEK_CUR);
+ if ((size = url_seek(h, -1, SEEK_END)) < 0)
+ return size;
+ size++;
+ url_seek(h, pos, SEEK_SET);
+ }
return size;
}
-/*
- * Return the maximum packet size associated to packetized file
- * handle. If the file is not packetized (stream like http or file on
- * disk), then 0 is returned.
- *
- * @param h file handle
- * @return maximum packet size in bytes
- */
+int url_get_file_handle(URLContext *h)
+{
+ if (!h->prot->url_get_file_handle)
+ return -1;
+ return h->prot->url_get_file_handle(h);
+}
+
int url_get_max_packet_size(URLContext *h)
{
return h->max_packet_size;
void url_get_filename(URLContext *h, char *buf, int buf_size)
{
- pstrcpy(buf, buf_size, h->filename);
+ av_strlcpy(buf, h->filename, buf_size);
}
return 0;
}
-/**
- * The callback is called in blocking functions to test regulary if
- * asynchronous interruption is needed. -EINTR is returned in this
- * case by the interrupted function. 'NULL' means no interrupt
- * callback is given.
- */
void url_set_interrupt_cb(URLInterruptCB *interrupt_cb)
{
if (!interrupt_cb)
interrupt_cb = default_interrupt_cb;
url_interrupt_cb = interrupt_cb;
}
+
+int av_url_read_pause(URLContext *h, int pause)
+{
+ if (!h->prot->url_read_pause)
+ return AVERROR(ENOSYS);
+ return h->prot->url_read_pause(h, pause);
+}
+
+int64_t av_url_read_seek(URLContext *h,
+ int stream_index, int64_t timestamp, int flags)
+{
+ if (!h->prot->url_read_seek)
+ return AVERROR(ENOSYS);
+ return h->prot->url_read_seek(h, stream_index, timestamp, flags);
+}
projects / ffmpeg / blobdiff