/*
* 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
*/
#ifndef AVFORMAT_AVIO_H
/**
* The callback is called in blocking functions to test regulary if
- * asynchronous interruption is needed. AVERROR(EINTR) is returned
+ * asynchronous interruption is needed. AVERROR_EXIT is returned
* in this case by the interrupted function. 'NULL' means no interrupt
* callback is given.
*/
*/
#define AVSEEK_FORCE 0x20000
+#define URL_PROTOCOL_FLAG_NESTED_SCHEME 1 /*< The protocol name can be the first part of a nested protocol scheme */
+
typedef struct URLProtocol {
const char *name;
int (*url_open)(URLContext *h, const char *url, int flags);
int (*url_get_file_handle)(URLContext *h);
int priv_data_size;
const AVClass *priv_data_class;
+ int flags;
} URLProtocol;
#if FF_API_REGISTER_PROTOCOL
* @}
*/
+attribute_deprecated int av_url_read_fpause(AVIOContext *h, int pause);
+attribute_deprecated int64_t av_url_read_fseek (AVIOContext *h, int stream_index,
+ int64_t timestamp, int flags);
/**
* @defgroup old_url_f_funcs Old url_f* functions
attribute_deprecated int url_fclose(AVIOContext *s);
attribute_deprecated int64_t url_fseek(AVIOContext *s, int64_t offset, int whence);
attribute_deprecated int url_fskip(AVIOContext *s, int64_t offset);
+attribute_deprecated int64_t url_ftell(AVIOContext *s);
+attribute_deprecated int64_t url_fsize(AVIOContext *s);
+#define URL_EOF (-1)
+attribute_deprecated int url_fgetc(AVIOContext *s);
+attribute_deprecated int url_setbufsize(AVIOContext *s, int buf_size);
+#ifdef __GNUC__
+attribute_deprecated int url_fprintf(AVIOContext *s, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 2, 3)));
+#else
+attribute_deprecated int url_fprintf(AVIOContext *s, const char *fmt, ...);
+#endif
+attribute_deprecated void put_flush_packet(AVIOContext *s);
/**
* @}
*/
+
+/**
+ * @deprecated use AVIOContext.eof_reached
+ */
+attribute_deprecated int url_feof(AVIOContext *s);
+attribute_deprecated int url_ferror(AVIOContext *s);
+
+attribute_deprecated int udp_set_remote_url(URLContext *h, const char *uri);
+attribute_deprecated int udp_get_local_port(URLContext *h);
+
+attribute_deprecated void init_checksum(AVIOContext *s,
+ unsigned long (*update_checksum)(unsigned long c, const uint8_t *p, unsigned int len),
+ unsigned long checksum);
+attribute_deprecated unsigned long get_checksum(AVIOContext *s);
#endif
+/**
+ * Allocate and initialize an AVIOContext for buffered I/O. It must be later
+ * freed with av_free().
+ *
+ * @param buffer Memory block for input/output operations via AVIOContext.
+ * @param buffer_size The buffer size is very important for performance.
+ * For protocols with fixed blocksize it should be set to this blocksize.
+ * For others a typical size is a cache page, e.g. 4kb.
+ * @param write_flag Set to 1 if the buffer should be writable, 0 otherwise.
+ * @param opaque An opaque pointer to user-specific data.
+ * @param read_packet A function for refilling the buffer, may be NULL.
+ * @param write_packet A function for writing the buffer contents, may be NULL.
+ * @param seek A function for seeking to specified byte position, may be NULL.
+ *
+ * @return Allocated AVIOContext or NULL on failure.
+ */
AVIOContext *avio_alloc_context(
unsigned char *buffer,
int buffer_size,
*/
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence);
+/**
+ * Skip given number of bytes forward
+ * @return new position or AVERROR.
+ */
+static av_always_inline int64_t avio_skip(AVIOContext *s, int64_t offset)
+{
+ return avio_seek(s, offset, SEEK_CUR);
+}
+
/**
* ftell() equivalent for AVIOContext.
* @return position or AVERROR.
*/
-int64_t url_ftell(AVIOContext *s);
+static av_always_inline int64_t avio_tell(AVIOContext *s)
+{
+ return avio_seek(s, 0, SEEK_CUR);
+}
/**
* Get the filesize.
* @return filesize or AVERROR
*/
-int64_t url_fsize(AVIOContext *s);
-
-/**
- * feof() equivalent for AVIOContext.
- * @return non zero if and only if end of file
- */
-int url_feof(AVIOContext *s);
-
-int url_ferror(AVIOContext *s);
-
-int av_url_read_fpause(AVIOContext *h, int pause);
-int64_t av_url_read_fseek(AVIOContext *h, int stream_index,
- int64_t timestamp, int flags);
-
-#define URL_EOF (-1)
-/** @note return URL_EOF (-1) if EOF */
-int url_fgetc(AVIOContext *s);
+int64_t avio_size(AVIOContext *s);
/** @warning currently size is limited */
#ifdef __GNUC__
-int url_fprintf(AVIOContext *s, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 2, 3)));
+int avio_printf(AVIOContext *s, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 2, 3)));
#else
-int url_fprintf(AVIOContext *s, const char *fmt, ...);
+int avio_printf(AVIOContext *s, const char *fmt, ...);
#endif
+#if FF_API_OLD_AVIO
/** @note unlike fgets, the EOL character is not returned and a whole
line is parsed. return NULL if first char read was EOF */
-char *url_fgets(AVIOContext *s, char *buf, int buf_size);
+attribute_deprecated char *url_fgets(AVIOContext *s, char *buf, int buf_size);
+#endif
-void put_flush_packet(AVIOContext *s);
+void avio_flush(AVIOContext *s);
/**
int avio_get_str16le(AVIOContext *pb, int maxlen, char *buf, int buflen);
int avio_get_str16be(AVIOContext *pb, int maxlen, char *buf, int buflen);
-char *get_strz(AVIOContext *s, char *buf, int maxlen);
+#if FF_API_OLD_AVIO
+/**
+ * @deprecated use avio_get_str instead
+ */
+attribute_deprecated char *get_strz(AVIOContext *s, char *buf, int maxlen);
+#endif
unsigned int avio_rb16(AVIOContext *s);
unsigned int avio_rb24(AVIOContext *s);
unsigned int avio_rb32(AVIOContext *s);
uint64_t avio_rb64(AVIOContext *s);
-uint64_t ff_get_v(AVIOContext *bc);
-
static inline int url_is_streamed(AVIOContext *s)
{
return s->is_streamed;
*/
int url_fdopen(AVIOContext **s, URLContext *h);
-/** @warning must be called before any I/O */
-int url_setbufsize(AVIOContext *s, int buf_size);
#if FF_API_URL_RESETBUF
/** Reset the buffer for reading or writing.
* @note Will drop any data currently in the buffer without transmitting it.
int url_resetbuf(AVIOContext *s, int flags);
#endif
-/**
- * Rewind the AVIOContext using the specified buffer containing the first buf_size bytes of the file.
- * Used after probing to avoid seeking.
- * Joins buf and s->buffer, taking any overlap into consideration.
- * @note s->buffer must overlap with buf or they can't be joined and the function fails
- * @note This function is NOT part of the public API
- *
- * @param s The read-only AVIOContext to rewind
- * @param buf The probe buffer containing the first buf_size bytes of the file
- * @param buf_size The size of buf
- * @return 0 in case of success, a negative value corresponding to an
- * AVERROR code in case of failure
- */
-int ff_rewind_with_probe_data(AVIOContext *s, unsigned char *buf, int buf_size);
-
/**
* Create and initialize a AVIOContext for accessing the
* resource indicated by url.
int avio_open(AVIOContext **s, const char *url, int flags);
int avio_close(AVIOContext *s);
-URLContext *url_fileno(AVIOContext *s);
+
+#if FF_API_OLD_AVIO
+attribute_deprecated URLContext *url_fileno(AVIOContext *s);
/**
- * Return the maximum packet size associated to packetized buffered file
- * handle. If the file is not packetized (stream like http or file on
- * disk), then 0 is returned.
- *
- * @param s buffered file handle
- * @return maximum packet size in bytes
+ * @deprecated use AVIOContext.max_packet_size directly.
*/
-int url_fget_max_packet_size(AVIOContext *s);
+attribute_deprecated int url_fget_max_packet_size(AVIOContext *s);
-int url_open_buf(AVIOContext **s, uint8_t *buf, int buf_size, int flags);
+attribute_deprecated int url_open_buf(AVIOContext **s, uint8_t *buf, int buf_size, int flags);
/** return the written or read size */
-int url_close_buf(AVIOContext *s);
+attribute_deprecated int url_close_buf(AVIOContext *s);
+#endif
/**
* Open a write only memory stream.
*/
int url_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer);
-unsigned long ff_crc04C11DB7_update(unsigned long checksum, const uint8_t *buf,
- unsigned int len);
-unsigned long get_checksum(AVIOContext *s);
-void init_checksum(AVIOContext *s,
- unsigned long (*update_checksum)(unsigned long c, const uint8_t *p, unsigned int len),
- unsigned long checksum);
-
-/* udp.c */
-int udp_set_remote_url(URLContext *h, const char *uri);
-int udp_get_local_port(URLContext *h);
#if FF_API_UDP_GET_FILE
int udp_get_file_handle(URLContext *h);
#endif
projects / ffmpeg / blobdiff