Removed custom FFmpegLock. Removed ffmpeg headers from third_party/ffmpeg/include.

third_party/ffmpeg/include/libavformat/avio.h

-/*
- * 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 libavformat/avio.h
- * 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*.
- */
-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 filename */
-};
-
-typedef struct URLContext 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);
-
-int url_open_protocol (URLContext **puc, struct URLProtocol *up,
-                       const char *filename, int flags);
-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);
-int url_exist(const char *filename);
-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
-
-typedef struct URLProtocol {
-    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 (*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
-
-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.
- * @returns 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.
- * @returns 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;
-}
-
-/** @note when opened as read/write, the buffers are only used for
-    writing */
-int url_fdopen(ByteIOContext **s, URLContext *h);
-
-/** @warning must be called before any I/O */
-int url_setbufsize(ByteIOContext *s, int buf_size);
-/** 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);
-
-/** @note when opened as read/write, the buffers are only used for
-    writing */
-int url_fopen(ByteIOContext **s, const char *filename, 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 */