* Unbuffered io for ffmpeg system
* Copyright (c) 2001 Fabrice Bellard
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav 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 FFmpeg; if not, write to the Free Software
+ * License along with Libav; 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 "libavutil/opt.h"
#include "os_support.h"
#if CONFIG_NETWORK
#include "network.h"
#endif
+#include "url.h"
-#if FF_API_URL_CLASS
/** @name Logging context. */
/*@{*/
static const char *urlcontext_to_name(void *ptr)
else return "NULL";
}
static const AVOption options[] = {{NULL}};
-static const AVClass urlcontext_class =
- { "URLContext", urlcontext_to_name, options, LIBAVUTIL_VERSION_INT };
+static const AVClass urlcontext_class = {
+ .class_name = "URLContext",
+ .item_name = urlcontext_to_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
/*@}*/
-#endif
static int default_interrupt_cb(void);
URLProtocol *first_protocol = NULL;
-URLInterruptCB *url_interrupt_cb = default_interrupt_cb;
+int (*url_interrupt_cb)(void) = default_interrupt_cb;
+#if FF_API_OLD_AVIO
URLProtocol *av_protocol_next(URLProtocol *p)
{
if(p) return p->next;
else return first_protocol;
}
+#endif
+
+const char *avio_enum_protocols(void **opaque, int output)
+{
+ URLProtocol **p = opaque;
+ *p = *p ? (*p)->next : first_protocol;
+ if (!*p) return NULL;
+ if ((output && (*p)->url_write) || (!output && (*p)->url_read))
+ return (*p)->name;
+ return avio_enum_protocols(opaque, output);
+}
-int av_register_protocol2(URLProtocol *protocol, int size)
+int ffurl_register_protocol(URLProtocol *protocol, int size)
{
URLProtocol **p;
if (size < sizeof(URLProtocol)) {
return 0;
}
-#if FF_API_REGISTER_PROTOCOL
-/* The layout of URLProtocol as of when major was bumped to 52 */
-struct URLProtocol_compat {
- const char *name;
- int (*url_open)(URLContext *h, const char *filename, int flags);
- int (*url_read)(URLContext *h, unsigned char *buf, int size);
- int (*url_write)(URLContext *h, unsigned char *buf, int size);
- int64_t (*url_seek)(URLContext *h, int64_t pos, int whence);
- int (*url_close)(URLContext *h);
- struct URLProtocol *next;
-};
-
-int av_register_protocol(URLProtocol *protocol)
-{
- return av_register_protocol2(protocol, sizeof(struct URLProtocol_compat));
-}
-
-int register_protocol(URLProtocol *protocol)
-{
- return av_register_protocol(protocol);
-}
-#endif
-
static int url_alloc_for_protocol (URLContext **puc, struct URLProtocol *up,
const char *filename, int flags)
{
err = AVERROR(ENOMEM);
goto fail;
}
-#if FF_API_URL_CLASS
uc->av_class = &urlcontext_class;
-#endif
uc->filename = (char *) &uc[1];
strcpy(uc->filename, filename);
uc->prot = up;
return err;
}
-int url_connect(URLContext* uc)
+int ffurl_connect(URLContext* uc)
{
int err = uc->prot->url_open(uc, uc->filename, uc->flags);
if (err)
return err;
uc->is_connected = 1;
- //We must be careful here as url_seek() could be slow, for example for http
- if( (uc->flags & (URL_WRONLY | URL_RDWR))
+ //We must be careful here as ffurl_seek() could be slow, for example for http
+ if( (uc->flags & AVIO_FLAG_WRITE)
|| !strcmp(uc->prot->name, "file"))
- if(!uc->is_streamed && url_seek(uc, 0, SEEK_SET) < 0)
+ if(!uc->is_streamed && ffurl_seek(uc, 0, SEEK_SET) < 0)
uc->is_streamed= 1;
return 0;
}
+#if FF_API_OLD_AVIO
int url_open_protocol (URLContext **puc, struct URLProtocol *up,
const char *filename, int flags)
{
ret = url_alloc_for_protocol(puc, up, filename, flags);
if (ret)
goto fail;
- ret = url_connect(*puc);
+ ret = ffurl_connect(*puc);
if (!ret)
return 0;
fail:
- url_close(*puc);
+ ffurl_close(*puc);
*puc = NULL;
return ret;
}
+int url_alloc(URLContext **puc, const char *filename, int flags)
+{
+ return ffurl_alloc(puc, filename, flags);
+}
+int url_connect(URLContext* uc)
+{
+ return ffurl_connect(uc);
+}
+int url_open(URLContext **puc, const char *filename, int flags)
+{
+ return ffurl_open(puc, filename, flags);
+}
+int url_read(URLContext *h, unsigned char *buf, int size)
+{
+ return ffurl_read(h, buf, size);
+}
+int url_read_complete(URLContext *h, unsigned char *buf, int size)
+{
+ return ffurl_read_complete(h, buf, size);
+}
+int url_write(URLContext *h, const unsigned char *buf, int size)
+{
+ return ffurl_write(h, buf, size);
+}
+int64_t url_seek(URLContext *h, int64_t pos, int whence)
+{
+ return ffurl_seek(h, pos, whence);
+}
+int url_close(URLContext *h)
+{
+ return ffurl_close(h);
+}
+int64_t url_filesize(URLContext *h)
+{
+ return ffurl_size(h);
+}
+int url_get_file_handle(URLContext *h)
+{
+ return ffurl_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)
+{
+ av_strlcpy(buf, h->filename, buf_size);
+}
+void url_set_interrupt_cb(URLInterruptCB *interrupt_cb)
+{
+ avio_set_interrupt_cb(interrupt_cb);
+}
+int av_register_protocol2(URLProtocol *protocol, int size)
+{
+ return ffurl_register_protocol(protocol, size);
+}
+#endif
#define URL_SCHEME_CHARS \
"abcdefghijklmnopqrstuvwxyz" \
"ABCDEFGHIJKLMNOPQRSTUVWXYZ" \
"0123456789+-."
-int url_alloc(URLContext **puc, const char *filename, int flags)
+int ffurl_alloc(URLContext **puc, const char *filename, int flags)
{
URLProtocol *up;
- char proto_str[128];
+ char proto_str[128], proto_nested[128], *ptr;
size_t proto_len = strspn(filename, URL_SCHEME_CHARS);
if (filename[proto_len] != ':' || is_dos_path(filename))
else
av_strlcpy(proto_str, filename, FFMIN(proto_len+1, sizeof(proto_str)));
+ av_strlcpy(proto_nested, proto_str, sizeof(proto_nested));
+ if ((ptr = strchr(proto_nested, '+')))
+ *ptr = '\0';
+
up = first_protocol;
while (up != NULL) {
if (!strcmp(proto_str, up->name))
return url_alloc_for_protocol (puc, up, filename, flags);
+ if (up->flags & URL_PROTOCOL_FLAG_NESTED_SCHEME &&
+ !strcmp(proto_nested, up->name))
+ return url_alloc_for_protocol (puc, up, filename, flags);
up = up->next;
}
*puc = NULL;
return AVERROR(ENOENT);
}
-int url_open(URLContext **puc, const char *filename, int flags)
+int ffurl_open(URLContext **puc, const char *filename, int flags)
{
- int ret = url_alloc(puc, filename, flags);
+ int ret = ffurl_alloc(puc, filename, flags);
if (ret)
return ret;
- ret = url_connect(*puc);
+ ret = ffurl_connect(*puc);
if (!ret)
return 0;
- url_close(*puc);
+ ffurl_close(*puc);
*puc = NULL;
return ret;
}
-int url_read(URLContext *h, unsigned char *buf, int size)
-{
- int ret;
- if (h->flags & URL_WRONLY)
- return AVERROR(EIO);
- ret = h->prot->url_read(h, buf, size);
- return ret;
-}
-
-int url_read_complete(URLContext *h, unsigned char *buf, int size)
+static inline int retry_transfer_wrapper(URLContext *h, unsigned char *buf, int size, int size_min,
+ int (*transfer_func)(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);
+ while (len < size_min) {
+ ret = transfer_func(h, buf+len, size-len);
+ if (ret == AVERROR(EINTR))
+ continue;
+ if (h->flags & AVIO_FLAG_NONBLOCK)
+ return ret;
if (ret == AVERROR(EAGAIN)) {
ret = 0;
if (fast_retries)
if (ret)
fast_retries = FFMAX(fast_retries, 2);
len += ret;
+ if (url_interrupt_cb())
+ return AVERROR_EXIT;
}
return len;
}
-int url_write(URLContext *h, const unsigned char *buf, int size)
+int ffurl_read(URLContext *h, unsigned char *buf, int size)
{
- int ret;
- if (!(h->flags & (URL_WRONLY | URL_RDWR)))
+ if (!(h->flags & AVIO_FLAG_READ))
+ return AVERROR(EIO);
+ return retry_transfer_wrapper(h, buf, size, 1, h->prot->url_read);
+}
+
+int ffurl_read_complete(URLContext *h, unsigned char *buf, int size)
+{
+ if (!(h->flags & AVIO_FLAG_READ))
+ return AVERROR(EIO);
+ return retry_transfer_wrapper(h, buf, size, size, h->prot->url_read);
+}
+
+int ffurl_write(URLContext *h, const unsigned char *buf, int size)
+{
+ if (!(h->flags & AVIO_FLAG_WRITE))
return AVERROR(EIO);
/* avoid sending too big packets */
if (h->max_packet_size && size > h->max_packet_size)
return AVERROR(EIO);
- ret = h->prot->url_write(h, buf, size);
- return ret;
+
+ return retry_transfer_wrapper(h, buf, size, size, h->prot->url_write);
}
-int64_t url_seek(URLContext *h, int64_t pos, int whence)
+int64_t ffurl_seek(URLContext *h, int64_t pos, int whence)
{
int64_t ret;
return ret;
}
-int url_close(URLContext *h)
+int ffurl_close(URLContext *h)
{
int ret = 0;
- if (!h) return 0; /* can happen when url_open fails */
+ if (!h) return 0; /* can happen when ffurl_open fails */
if (h->is_connected && h->prot->url_close)
ret = h->prot->url_close(h);
return ret;
}
+#if FF_API_OLD_AVIO
int url_exist(const char *filename)
{
URLContext *h;
- if (url_open(&h, filename, URL_RDONLY) < 0)
+ if (ffurl_open(&h, filename, AVIO_FLAG_READ) < 0)
return 0;
- url_close(h);
+ ffurl_close(h);
return 1;
}
+#endif
-int64_t url_filesize(URLContext *h)
+int avio_check(const char *url, int flags)
+{
+ URLContext *h;
+ int ret = ffurl_alloc(&h, url, flags);
+ if (ret)
+ return ret;
+
+ if (h->prot->url_check) {
+ ret = h->prot->url_check(h, flags);
+ } else {
+ ret = ffurl_connect(h);
+ if (ret >= 0)
+ ret = flags;
+ }
+
+ ffurl_close(h);
+ return ret;
+}
+
+int64_t ffurl_size(URLContext *h)
{
int64_t pos, size;
- size= url_seek(h, 0, AVSEEK_SIZE);
+ size= ffurl_seek(h, 0, AVSEEK_SIZE);
if(size<0){
- pos = url_seek(h, 0, SEEK_CUR);
- if ((size = url_seek(h, -1, SEEK_END)) < 0)
+ pos = ffurl_seek(h, 0, SEEK_CUR);
+ if ((size = ffurl_seek(h, -1, SEEK_END)) < 0)
return size;
size++;
- url_seek(h, pos, SEEK_SET);
+ ffurl_seek(h, pos, SEEK_SET);
}
return size;
}
-int url_get_file_handle(URLContext *h)
+int ffurl_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)
-{
- av_strlcpy(buf, h->filename, buf_size);
-}
-
-
static int default_interrupt_cb(void)
{
return 0;
}
-void url_set_interrupt_cb(URLInterruptCB *interrupt_cb)
+void avio_set_interrupt_cb(int (*interrupt_cb)(void))
{
if (!interrupt_cb)
interrupt_cb = default_interrupt_cb;
url_interrupt_cb = interrupt_cb;
}
+#if FF_API_OLD_AVIO
int av_url_read_pause(URLContext *h, int pause)
{
if (!h->prot->url_read_pause)
return AVERROR(ENOSYS);
return h->prot->url_read_seek(h, stream_index, timestamp, flags);
}
+#endif
projects / ffmpeg / blobdiff