/*
- * Unbuffered io for ffmpeg system
+ * unbuffered I/O
* 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/dict.h"
#include "libavutil/opt.h"
+#include "libavutil/time.h"
#include "os_support.h"
#include "avformat.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)
{
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, LIBAVUTIL_VERSION_INT };
-/*@}*/
-#endif
-
-static int default_interrupt_cb(void);
-
-URLProtocol *first_protocol = NULL;
-URLInterruptCB *url_interrupt_cb = default_interrupt_cb;
-
-URLProtocol *av_protocol_next(URLProtocol *p)
-{
- if(p) return p->next;
- else return first_protocol;
+ if (h->prot)
+ return h->prot->name;
+ else
+ return "NULL";
}
-int av_register_protocol2(URLProtocol *protocol, int size)
+static void *urlcontext_child_next(void *obj, void *prev)
{
- URLProtocol **p;
- if (size < sizeof(URLProtocol)) {
- URLProtocol* temp = av_mallocz(sizeof(URLProtocol));
- memcpy(temp, protocol, size);
- protocol = temp;
- }
- p = &first_protocol;
- while (*p != NULL) p = &(*p)->next;
- *p = protocol;
- protocol->next = NULL;
- return 0;
+ URLContext *h = obj;
+ if (!prev && h->priv_data && h->prot->priv_data_class)
+ return h->priv_data;
+ return NULL;
}
-#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;
+static const AVOption options[] = {
+ { "rw_timeout", "Timeout for IO operations (in microseconds)", offsetof(URLContext, rw_timeout), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_DECODING_PARAM },
+ { NULL }
};
+const AVClass ffurl_context_class = {
+ .class_name = "URLContext",
+ .item_name = urlcontext_to_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+ .child_next = urlcontext_child_next,
+ .child_class_next = ff_urlcontext_child_class_next,
+};
+/*@}*/
-int av_register_protocol(URLProtocol *protocol)
-{
- return av_register_protocol2(protocol, sizeof(struct URLProtocol_compat));
-}
-
-int register_protocol(URLProtocol *protocol)
-{
- return av_register_protocol2(protocol, sizeof(struct URLProtocol_compat));
-}
-#endif
-
-static int url_alloc_for_protocol (URLContext **puc, struct URLProtocol *up,
- const char *filename, int flags)
+static int url_alloc_for_protocol(URLContext **puc, const URLProtocol *up,
+ const char *filename, int flags,
+ const AVIOInterruptCB *int_cb,
+ const URLProtocol **protocols)
{
URLContext *uc;
int err;
#if CONFIG_NETWORK
- if (!ff_network_init())
+ if (up->flags & URL_PROTOCOL_FLAG_NETWORK && !ff_network_init())
return AVERROR(EIO);
#endif
uc = av_mallocz(sizeof(URLContext) + strlen(filename) + 1);
err = AVERROR(ENOMEM);
goto fail;
}
-#if FF_API_URL_CLASS
- uc->av_class = &urlcontext_class;
-#endif
- uc->filename = (char *) &uc[1];
+ uc->av_class = &ffurl_context_class;
+ uc->filename = (char *)&uc[1];
strcpy(uc->filename, filename);
- uc->prot = up;
- uc->flags = flags;
- uc->is_streamed = 0; /* default = not streamed */
+ uc->prot = up;
+ uc->flags = flags;
+ uc->is_streamed = 0; /* default = not streamed */
uc->max_packet_size = 0; /* default: stream file */
+ uc->protocols = protocols;
if (up->priv_data_size) {
uc->priv_data = av_mallocz(up->priv_data_size);
+ if (!uc->priv_data) {
+ err = AVERROR(ENOMEM);
+ goto fail;
+ }
if (up->priv_data_class) {
- *(const AVClass**)uc->priv_data = up->priv_data_class;
+ *(const AVClass **)uc->priv_data = up->priv_data_class;
av_opt_set_defaults(uc->priv_data);
}
}
+ if (int_cb)
+ uc->interrupt_callback = *int_cb;
*puc = uc;
return 0;
- fail:
+fail:
*puc = NULL;
+ if (uc)
+ av_freep(&uc->priv_data);
+ av_freep(&uc);
#if CONFIG_NETWORK
- ff_network_close();
+ if (up->flags & URL_PROTOCOL_FLAG_NETWORK)
+ ff_network_close();
#endif
return err;
}
-int url_connect(URLContext* uc)
+int ffurl_connect(URLContext *uc, AVDictionary **options)
{
- int err = uc->prot->url_open(uc, uc->filename, uc->flags);
+ int err =
+ uc->prot->url_open2 ? uc->prot->url_open2(uc,
+ uc->filename,
+ uc->flags,
+ options) :
+ 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))
- || !strcmp(uc->prot->name, "file"))
- if(!uc->is_streamed && url_seek(uc, 0, SEEK_SET) < 0)
- uc->is_streamed= 1;
+ /* 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 && ffurl_seek(uc, 0, SEEK_SET) < 0)
+ uc->is_streamed = 1;
return 0;
}
-int url_open_protocol (URLContext **puc, struct URLProtocol *up,
- const char *filename, int flags)
-{
- int ret;
-
- ret = url_alloc_for_protocol(puc, up, filename, flags);
- if (ret)
- goto fail;
- ret = url_connect(*puc);
- if (!ret)
- return 0;
- fail:
- url_close(*puc);
- *puc = NULL;
- return ret;
-}
-
#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,
+ const AVIOInterruptCB *int_cb,
+ const URLProtocol **protocols)
{
- URLProtocol *up;
- char proto_str[128];
+ char proto_str[128], proto_nested[128], *ptr;
size_t proto_len = strspn(filename, URL_SCHEME_CHARS);
+ int i;
if (filename[proto_len] != ':' || is_dos_path(filename))
strcpy(proto_str, "file");
else
- av_strlcpy(proto_str, filename, FFMIN(proto_len+1, sizeof(proto_str)));
+ av_strlcpy(proto_str, filename,
+ FFMIN(proto_len + 1, sizeof(proto_str)));
- up = first_protocol;
- while (up != NULL) {
+ av_strlcpy(proto_nested, proto_str, sizeof(proto_nested));
+ if ((ptr = strchr(proto_nested, '+')))
+ *ptr = '\0';
+
+ for (i = 0; protocols[i]; i++) {
+ const URLProtocol *up = protocols[i];
if (!strcmp(proto_str, up->name))
- return url_alloc_for_protocol (puc, up, filename, flags);
- up = up->next;
+ return url_alloc_for_protocol(puc, up, filename, flags, int_cb,
+ protocols);
+ if (up->flags & URL_PROTOCOL_FLAG_NESTED_SCHEME &&
+ !strcmp(proto_nested, up->name))
+ return url_alloc_for_protocol(puc, up, filename, flags, int_cb,
+ protocols);
}
*puc = NULL;
- return AVERROR(ENOENT);
+ return AVERROR_PROTOCOL_NOT_FOUND;
}
-int url_open(URLContext **puc, const char *filename, int flags)
+int ffurl_open(URLContext **puc, const char *filename, int flags,
+ const AVIOInterruptCB *int_cb, AVDictionary **options,
+ const URLProtocol **protocols,
+ URLContext *parent)
{
- int ret = url_alloc(puc, filename, flags);
+ int ret = ffurl_alloc(puc, filename, flags, int_cb, protocols);
if (ret)
return ret;
- ret = url_connect(*puc);
+ if (parent)
+ av_opt_copy(*puc, parent);
+ if (options &&
+ (ret = av_opt_set_dict(*puc, options)) < 0)
+ goto fail;
+ if (options && (*puc)->prot->priv_data_class &&
+ (ret = av_opt_set_dict((*puc)->priv_data, options)) < 0)
+ goto fail;
+ ret = ffurl_connect(*puc, options);
if (!ret)
return 0;
- url_close(*puc);
+fail:
+ 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;
-}
-
-static inline int retry_transfer_wrapper(URLContext *h, unsigned char *buf, int size,
- int (*transfer_func)(URLContext *h, unsigned char *buf, int size))
+static inline int retry_transfer_wrapper(URLContext *h, uint8_t *buf,
+ int size, int size_min,
+ int (*transfer_func)(URLContext *h,
+ uint8_t *buf,
+ int size))
{
int ret, len;
int fast_retries = 5;
+ int64_t wait_since = 0;
len = 0;
- while (len < size) {
- ret = transfer_func(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 (fast_retries) {
fast_retries--;
- else
- usleep(1000);
+ } else {
+ if (h->rw_timeout) {
+ if (!wait_since)
+ wait_since = av_gettime_relative();
+ else if (av_gettime_relative() > wait_since + h->rw_timeout)
+ return AVERROR(EIO);
+ }
+ av_usleep(1000);
+ }
} else if (ret < 1)
- return ret < 0 ? ret : len;
- if (ret)
- fast_retries = FFMAX(fast_retries, 2);
+ return (ret < 0 && ret != AVERROR_EOF) ? ret : len;
+ if (ret) {
+ fast_retries = FFMAX(fast_retries, 2);
+ wait_since = 0;
+ }
len += ret;
+ if (ff_check_interrupt(&h->interrupt_callback))
+ return AVERROR_EXIT;
}
return len;
}
-int url_read_complete(URLContext *h, unsigned char *buf, int size)
+int ffurl_read(URLContext *h, unsigned char *buf, int size)
+{
+ 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)
{
- return retry_transfer_wrapper(h, buf, size, url_read);
+ if (!(h->flags & AVIO_FLAG_READ))
+ return AVERROR(EIO);
+ return retry_transfer_wrapper(h, buf, size, size, h->prot->url_read);
}
-int url_write(URLContext *h, const unsigned char *buf, int size)
+int ffurl_write(URLContext *h, const unsigned char *buf, int size)
{
- int ret;
- if (!(h->flags & (URL_WRONLY | URL_RDWR)))
+ 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);
- return retry_transfer_wrapper(h, buf, size, h->prot->url_write);
+ return retry_transfer_wrapper(h, buf, size, size,
+ (int (*)(struct URLContext *, uint8_t *, int))
+ 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);
#if CONFIG_NETWORK
- ff_network_close();
+ if (h->prot->flags & URL_PROTOCOL_FLAG_NETWORK)
+ ff_network_close();
#endif
- if (h->prot->priv_data_size)
+ if (h->prot->priv_data_size) {
+ if (h->prot->priv_data_class)
+ av_opt_free(h->priv_data);
av_free(h->priv_data);
+ }
av_free(h);
return ret;
}
-int url_exist(const char *filename)
+int avio_check(const char *url, int flags)
{
+ const URLProtocol **protocols;
URLContext *h;
- if (url_open(&h, filename, URL_RDONLY) < 0)
- return 0;
- url_close(h);
- return 1;
+ int ret;
+
+ protocols = ffurl_get_protocols(NULL, NULL);
+ if (!protocols)
+ return AVERROR(ENOMEM);
+
+ ret = ffurl_alloc(&h, url, flags, NULL, protocols);
+ if (ret) {
+ av_freep(&protocols);
+ return ret;
+ }
+
+ if (h->prot->url_check) {
+ ret = h->prot->url_check(h, flags);
+ } else {
+ ret = ffurl_connect(h, NULL);
+ if (ret >= 0)
+ ret = flags;
+ }
+
+ ffurl_close(h);
+ av_freep(&protocols);
+ return ret;
}
-int64_t url_filesize(URLContext *h)
+int64_t ffurl_size(URLContext *h)
{
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)
+ size = ffurl_seek(h, 0, AVSEEK_SIZE);
+ if (size < 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)
+int ffurl_get_multi_file_handle(URLContext *h, int **handles, int *numhandles)
{
- return h->max_packet_size;
+ if (!h->prot->url_get_multi_file_handle) {
+ if (!h->prot->url_get_file_handle)
+ return AVERROR(ENOSYS);
+ *handles = av_malloc(sizeof(**handles));
+ if (!*handles)
+ return AVERROR(ENOMEM);
+ *numhandles = 1;
+ *handles[0] = h->prot->url_get_file_handle(h);
+ return 0;
+ }
+ return h->prot->url_get_multi_file_handle(h, handles, numhandles);
}
-void url_get_filename(URLContext *h, char *buf, int buf_size)
+int ffurl_shutdown(URLContext *h, int flags)
{
- av_strlcpy(buf, h->filename, buf_size);
+ if (!h->prot->url_shutdown)
+ return AVERROR(EINVAL);
+ return h->prot->url_shutdown(h, flags);
}
-
-static int default_interrupt_cb(void)
+int ff_check_interrupt(AVIOInterruptCB *cb)
{
+ int ret;
+ if (cb && cb->callback && (ret = cb->callback(cb->opaque)))
+ return ret;
return 0;
}
-
-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