+++ /dev/null
-/*
- * Unbuffered io for ffmpeg system
- * Copyright (c) 2001 Fabrice Bellard
- *
- * This library 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.
- *
- * This library 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
- */
-#include "avformat.h"
-
-static int default_interrupt_cb(void);
-
-URLProtocol *first_protocol = NULL;
-URLInterruptCB *url_interrupt_cb = default_interrupt_cb;
-
-int register_protocol(URLProtocol *protocol)
-{
- URLProtocol **p;
- p = &first_protocol;
- while (*p != NULL) p = &(*p)->next;
- *p = protocol;
- protocol->next = NULL;
- return 0;
-}
-
-int url_open(URLContext **puc, const char *filename, int flags)
-{
- URLContext *uc;
- URLProtocol *up;
- const char *p;
- char proto_str[128], *q;
- int err;
-
- p = filename;
- q = proto_str;
- while (*p != '\0' && *p != ':') {
- /* protocols can only contain alphabetic chars */
- if (!isalpha(*p))
- goto file_proto;
- if ((q - proto_str) < sizeof(proto_str) - 1)
- *q++ = *p;
- p++;
- }
- /* if the protocol has length 1, we consider it is a dos drive */
- if (*p == '\0' || (q - proto_str) <= 1) {
- file_proto:
- strcpy(proto_str, "file");
- } else {
- *q = '\0';
- }
-
- up = first_protocol;
- while (up != NULL) {
- if (!strcmp(proto_str, up->name))
- goto found;
- 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;
-}
-
-int url_read(URLContext *h, unsigned char *buf, int size)
-{
- int ret;
- if (h->flags & URL_WRONLY)
- return -EIO;
- ret = h->prot->url_read(h, buf, size);
- return ret;
-}
-
-int url_write(URLContext *h, unsigned char *buf, int size)
-{
- int ret;
- if (!(h->flags & (URL_WRONLY | URL_RDWR)))
- return -EIO;
- /* avoid sending too big packets */
- if (h->max_packet_size && size > h->max_packet_size)
- return -EIO;
- ret = h->prot->url_write(h, buf, size);
- return ret;
-}
-
-offset_t url_seek(URLContext *h, offset_t pos, int whence)
-{
- offset_t ret;
-
- if (!h->prot->url_seek)
- return -EPIPE;
- ret = h->prot->url_seek(h, pos, whence);
- return ret;
-}
-
-int url_close(URLContext *h)
-{
- int ret;
-
- ret = h->prot->url_close(h);
- av_free(h);
- return ret;
-}
-
-int url_exist(const char *filename)
-{
- URLContext *h;
- if (url_open(&h, filename, URL_RDONLY) < 0)
- return 0;
- url_close(h);
- return 1;
-}
-
-offset_t url_filesize(URLContext *h)
-{
- offset_t pos, size;
-
- pos = url_seek(h, 0, SEEK_CUR);
- size = url_seek(h, 0, SEEK_END);
- 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_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);
-}
-
-
-static int default_interrupt_cb(void)
-{
- 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;
-}
projects / synfig.git / blobdiff