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Diffstat (limited to 'lib-x86-32/include/libavformat/avio.h')
| -rw-r--r-- | lib-x86-32/include/libavformat/avio.h | 525 |
1 files changed, 0 insertions, 525 deletions
diff --git a/lib-x86-32/include/libavformat/avio.h b/lib-x86-32/include/libavformat/avio.h deleted file mode 100644 index 9ffe9356..00000000 --- a/lib-x86-32/include/libavformat/avio.h +++ /dev/null @@ -1,525 +0,0 @@ -/* - * copyright (c) 2001 Fabrice Bellard - * - * 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 2.1 of the License, or (at your option) any later version. - * - * 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 FFmpeg; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ -#ifndef AVFORMAT_AVIO_H -#define AVFORMAT_AVIO_H - -/** - * @file - * unbuffered I/O operations - * - * @warning This file has to be considered an internal but installed - * header, so it should not be directly included in your projects. - */ - -#include <stdint.h> - -#include "libavutil/common.h" - -/* unbuffered I/O */ - -/** - * URL Context. - * New fields can be added to the end with minor version bumps. - * Removal, reordering and changes to existing fields require a major - * version bump. - * sizeof(URLContext) must not be used outside libav*. - */ -typedef struct URLContext { -#if LIBAVFORMAT_VERSION_MAJOR >= 53 - const AVClass *av_class; ///< information for av_log(). Set by url_open(). -#endif - struct URLProtocol *prot; - int flags; - int is_streamed; /**< true if streamed (no seek possible), default = false */ - int max_packet_size; /**< if non zero, the stream is packetized with this max packet size */ - void *priv_data; - char *filename; /**< specified URL */ -} URLContext; - -typedef struct URLPollEntry { - URLContext *handle; - int events; - int revents; -} URLPollEntry; - -#define URL_RDONLY 0 -#define URL_WRONLY 1 -#define URL_RDWR 2 - -typedef int URLInterruptCB(void); - -/** - * Creates an URLContext for accessing to the resource indicated by - * url, and opens it using the URLProtocol up. - * - * @param puc pointer to the location where, in case of success, the - * function puts the pointer to the created URLContext - * @param flags flags which control how the resource indicated by url - * is to be opened - * @return 0 in case of success, a negative value corresponding to an - * AVERROR code in case of failure - */ -int url_open_protocol (URLContext **puc, struct URLProtocol *up, - const char *url, int flags); - -/** - * Creates an URLContext for accessing to the resource indicated by - * url, and opens it. - * - * @param puc pointer to the location where, in case of success, the - * function puts the pointer to the created URLContext - * @param flags flags which control how the resource indicated by url - * is to be opened - * @return 0 in case of success, a negative value corresponding to an - * AVERROR code in case of failure - */ -int url_open(URLContext **h, const char *url, int flags); - -/** - * Reads up to size bytes from the resource accessed by h, and stores - * the read bytes in buf. - * - * @return The number of bytes actually read, or a negative value - * corresponding to an AVERROR code in case of error. A value of zero - * indicates that it is not possible to read more from the accessed - * resource (except if the value of the size argument is also zero). - */ -int url_read(URLContext *h, unsigned char *buf, int size); - -/** - * Read as many bytes as possible (up to size), calling the - * read function multiple times if necessary. - * Will also retry if the read function returns AVERROR(EAGAIN). - * This makes special short-read handling in applications - * unnecessary, if the return value is < size then it is - * certain there was either an error or the end of file was reached. - */ -int url_read_complete(URLContext *h, unsigned char *buf, int size); -int url_write(URLContext *h, unsigned char *buf, int size); - -/** - * Changes the position that will be used by the next read/write - * operation on the resource accessed by h. - * - * @param pos specifies the new position to set - * @param whence specifies how pos should be interpreted, it must be - * one of SEEK_SET (seek from the beginning), SEEK_CUR (seek from the - * current position), SEEK_END (seek from the end), or AVSEEK_SIZE - * (return the filesize of the requested resource, pos is ignored). - * @return a negative value corresponding to an AVERROR code in case - * of failure, or the resulting file position, measured in bytes from - * the beginning of the file. You can use this feature together with - * SEEK_CUR to read the current file position. - */ -int64_t url_seek(URLContext *h, int64_t pos, int whence); - -/** - * Closes the resource accessed by the URLContext h, and frees the - * memory used by it. - * - * @return a negative value if an error condition occurred, 0 - * otherwise - */ -int url_close(URLContext *h); - -/** - * Returns a non-zero value if the resource indicated by url - * exists, 0 otherwise. - */ -int url_exist(const char *url); - -int64_t url_filesize(URLContext *h); - -/** - * Return the file descriptor associated with this URL. For RTP, this - * will return only the RTP file descriptor, not the RTCP file descriptor. - * To get both, use rtp_get_file_handles(). - * - * @return the file descriptor associated with this URL, or <0 on error. - */ -int url_get_file_handle(URLContext *h); - -/** - * 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); -void url_get_filename(URLContext *h, char *buf, int buf_size); - -/** - * The callback is called in blocking functions to test regulary if - * asynchronous interruption is needed. AVERROR(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); - -/* not implemented */ -int url_poll(URLPollEntry *poll_table, int n, int timeout); - -/** - * Pause and resume playing - only meaningful if using a network streaming - * protocol (e.g. MMS). - * @param pause 1 for pause, 0 for resume - */ -int av_url_read_pause(URLContext *h, int pause); - -/** - * Seek to a given timestamp relative to some component stream. - * Only meaningful if using a network streaming protocol (e.g. MMS.). - * @param stream_index The stream index that the timestamp is relative to. - * If stream_index is (-1) the timestamp should be in AV_TIME_BASE - * units from the beginning of the presentation. - * If a stream_index >= 0 is used and the protocol does not support - * seeking based on component streams, the call will fail with ENOTSUP. - * @param timestamp timestamp in AVStream.time_base units - * or if there is no stream specified then in AV_TIME_BASE units. - * @param flags Optional combination of AVSEEK_FLAG_BACKWARD, AVSEEK_FLAG_BYTE - * and AVSEEK_FLAG_ANY. The protocol may silently ignore - * AVSEEK_FLAG_BACKWARD and AVSEEK_FLAG_ANY, but AVSEEK_FLAG_BYTE will - * fail with ENOTSUP if used and not supported. - * @return >= 0 on success - * @see AVInputFormat::read_seek - */ -int64_t av_url_read_seek(URLContext *h, int stream_index, - int64_t timestamp, int flags); - -/** - * Passing this as the "whence" parameter to a seek function causes it to - * return the filesize without seeking anywhere. Supporting this is optional. - * If it is not supported then the seek function will return <0. - */ -#define AVSEEK_SIZE 0x10000 - -/** - * Oring this flag as into the "whence" parameter to a seek function causes it to - * seek by any means (like reopening and linear reading) or other normally unreasonble - * means that can be extreemly slow. - * This may be ignored by the seek code. - */ -#define AVSEEK_FORCE 0x20000 - -typedef struct URLProtocol { - const char *name; - int (*url_open)(URLContext *h, const char *url, 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 (*url_read_pause)(URLContext *h, int pause); - int64_t (*url_read_seek)(URLContext *h, int stream_index, - int64_t timestamp, int flags); - int (*url_get_file_handle)(URLContext *h); -} URLProtocol; - -#if LIBAVFORMAT_VERSION_MAJOR < 53 -extern URLProtocol *first_protocol; -#endif - -extern URLInterruptCB *url_interrupt_cb; - -/** - * If protocol is NULL, returns the first registered protocol, - * if protocol is non-NULL, returns the next registered protocol after protocol, - * or NULL if protocol is the last one. - */ -URLProtocol *av_protocol_next(URLProtocol *p); - -#if LIBAVFORMAT_VERSION_MAJOR < 53 -/** - * @deprecated Use av_register_protocol() instead. - */ -attribute_deprecated int register_protocol(URLProtocol *protocol); -#endif - -/** - * Registers the URLProtocol protocol. - */ -int av_register_protocol(URLProtocol *protocol); - -/** - * Bytestream IO Context. - * New fields can be added to the end with minor version bumps. - * Removal, reordering and changes to existing fields require a major - * version bump. - * sizeof(ByteIOContext) must not be used outside libav*. - */ -typedef struct { - unsigned char *buffer; - int buffer_size; - unsigned char *buf_ptr, *buf_end; - void *opaque; - int (*read_packet)(void *opaque, uint8_t *buf, int buf_size); - int (*write_packet)(void *opaque, uint8_t *buf, int buf_size); - int64_t (*seek)(void *opaque, int64_t offset, int whence); - int64_t pos; /**< position in the file of the current buffer */ - int must_flush; /**< true if the next seek should flush */ - int eof_reached; /**< true if eof reached */ - int write_flag; /**< true if open for writing */ - int is_streamed; - int max_packet_size; - unsigned long checksum; - unsigned char *checksum_ptr; - unsigned long (*update_checksum)(unsigned long checksum, const uint8_t *buf, unsigned int size); - int error; ///< contains the error code or 0 if no error happened - int (*read_pause)(void *opaque, int pause); - int64_t (*read_seek)(void *opaque, int stream_index, - int64_t timestamp, int flags); -} ByteIOContext; - -int init_put_byte(ByteIOContext *s, - unsigned char *buffer, - int buffer_size, - int write_flag, - void *opaque, - int (*read_packet)(void *opaque, uint8_t *buf, int buf_size), - int (*write_packet)(void *opaque, uint8_t *buf, int buf_size), - int64_t (*seek)(void *opaque, int64_t offset, int whence)); -ByteIOContext *av_alloc_put_byte( - unsigned char *buffer, - int buffer_size, - int write_flag, - void *opaque, - int (*read_packet)(void *opaque, uint8_t *buf, int buf_size), - int (*write_packet)(void *opaque, uint8_t *buf, int buf_size), - int64_t (*seek)(void *opaque, int64_t offset, int whence)); - -void put_byte(ByteIOContext *s, int b); -void put_buffer(ByteIOContext *s, const unsigned char *buf, int size); -void put_le64(ByteIOContext *s, uint64_t val); -void put_be64(ByteIOContext *s, uint64_t val); -void put_le32(ByteIOContext *s, unsigned int val); -void put_be32(ByteIOContext *s, unsigned int val); -void put_le24(ByteIOContext *s, unsigned int val); -void put_be24(ByteIOContext *s, unsigned int val); -void put_le16(ByteIOContext *s, unsigned int val); -void put_be16(ByteIOContext *s, unsigned int val); -void put_tag(ByteIOContext *s, const char *tag); - -void put_strz(ByteIOContext *s, const char *buf); - -/** - * fseek() equivalent for ByteIOContext. - * @return new position or AVERROR. - */ -int64_t url_fseek(ByteIOContext *s, int64_t offset, int whence); - -/** - * Skip given number of bytes forward. - * @param offset number of bytes - */ -void url_fskip(ByteIOContext *s, int64_t offset); - -/** - * ftell() equivalent for ByteIOContext. - * @return position or AVERROR. - */ -int64_t url_ftell(ByteIOContext *s); - -/** - * Gets the filesize. - * @return filesize or AVERROR - */ -int64_t url_fsize(ByteIOContext *s); - -/** - * feof() equivalent for ByteIOContext. - * @return non zero if and only if end of file - */ -int url_feof(ByteIOContext *s); - -int url_ferror(ByteIOContext *s); - -int av_url_read_fpause(ByteIOContext *h, int pause); -int64_t av_url_read_fseek(ByteIOContext *h, int stream_index, - int64_t timestamp, int flags); - -#define URL_EOF (-1) -/** @note return URL_EOF (-1) if EOF */ -int url_fgetc(ByteIOContext *s); - -/** @warning currently size is limited */ -#ifdef __GNUC__ -int url_fprintf(ByteIOContext *s, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 2, 3))); -#else -int url_fprintf(ByteIOContext *s, const char *fmt, ...); -#endif - -/** @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(ByteIOContext *s, char *buf, int buf_size); - -void put_flush_packet(ByteIOContext *s); - - -/** - * Reads size bytes from ByteIOContext into buf. - * @return number of bytes read or AVERROR - */ -int get_buffer(ByteIOContext *s, unsigned char *buf, int size); - -/** - * Reads size bytes from ByteIOContext into buf. - * This reads at most 1 packet. If that is not enough fewer bytes will be - * returned. - * @return number of bytes read or AVERROR - */ -int get_partial_buffer(ByteIOContext *s, unsigned char *buf, int size); - -/** @note return 0 if EOF, so you cannot use it if EOF handling is - necessary */ -int get_byte(ByteIOContext *s); -unsigned int get_le24(ByteIOContext *s); -unsigned int get_le32(ByteIOContext *s); -uint64_t get_le64(ByteIOContext *s); -unsigned int get_le16(ByteIOContext *s); - -char *get_strz(ByteIOContext *s, char *buf, int maxlen); -unsigned int get_be16(ByteIOContext *s); -unsigned int get_be24(ByteIOContext *s); -unsigned int get_be32(ByteIOContext *s); -uint64_t get_be64(ByteIOContext *s); - -uint64_t ff_get_v(ByteIOContext *bc); - -static inline int url_is_streamed(ByteIOContext *s) -{ - return s->is_streamed; -} - -/** - * Creates and initializes a ByteIOContext for accessing the - * resource referenced by the URLContext h. - * @note When the URLContext h has been opened in read+write mode, the - * ByteIOContext can be used only for writing. - * - * @param s Used to return the pointer to the created ByteIOContext. - * In case of failure the pointed to value is set to NULL. - * @return 0 in case of success, a negative value corresponding to an - * AVERROR code in case of failure - */ -int url_fdopen(ByteIOContext **s, URLContext *h); - -/** @warning must be called before any I/O */ -int url_setbufsize(ByteIOContext *s, int buf_size); -#if LIBAVFORMAT_VERSION_MAJOR < 53 -/** Reset the buffer for reading or writing. - * @note Will drop any data currently in the buffer without transmitting it. - * @param flags URL_RDONLY to set up the buffer for reading, or URL_WRONLY - * to set up the buffer for writing. */ -int url_resetbuf(ByteIOContext *s, int flags); -#endif - -/** - * Rewinds the ByteIOContext 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 ByteIOContext 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(ByteIOContext *s, unsigned char *buf, int buf_size); - -/** - * Creates and initializes a ByteIOContext for accessing the - * resource indicated by url. - * @note When the resource indicated by url has been opened in - * read+write mode, the ByteIOContext can be used only for writing. - * - * @param s Used to return the pointer to the created ByteIOContext. - * In case of failure the pointed to value is set to NULL. - * @param flags flags which control how the resource indicated by url - * is to be opened - * @return 0 in case of success, a negative value corresponding to an - * AVERROR code in case of failure - */ -int url_fopen(ByteIOContext **s, const char *url, int flags); - -int url_fclose(ByteIOContext *s); -URLContext *url_fileno(ByteIOContext *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 - */ -int url_fget_max_packet_size(ByteIOContext *s); - -int url_open_buf(ByteIOContext **s, uint8_t *buf, int buf_size, int flags); - -/** return the written or read size */ -int url_close_buf(ByteIOContext *s); - -/** - * Open a write only memory stream. - * - * @param s new IO context - * @return zero if no error. - */ -int url_open_dyn_buf(ByteIOContext **s); - -/** - * Open a write only packetized memory stream with a maximum packet - * size of 'max_packet_size'. The stream is stored in a memory buffer - * with a big endian 4 byte header giving the packet size in bytes. - * - * @param s new IO context - * @param max_packet_size maximum packet size (must be > 0) - * @return zero if no error. - */ -int url_open_dyn_packet_buf(ByteIOContext **s, int max_packet_size); - -/** - * Return the written size and a pointer to the buffer. The buffer - * must be freed with av_free(). - * @param s IO context - * @param pbuffer pointer to a byte buffer - * @return the length of the byte buffer - */ -int url_close_dyn_buf(ByteIOContext *s, uint8_t **pbuffer); - -unsigned long ff_crc04C11DB7_update(unsigned long checksum, const uint8_t *buf, - unsigned int len); -unsigned long get_checksum(ByteIOContext *s); -void init_checksum(ByteIOContext *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 (LIBAVFORMAT_VERSION_MAJOR <= 52) -int udp_get_file_handle(URLContext *h); -#endif - -#endif /* AVFORMAT_AVIO_H */ |