2008-08-28 01:43:28 +02:00
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/*
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* copyright (c) 2001 Fabrice Bellard
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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2008-08-31 09:39:47 +02:00
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#ifndef AVFORMAT_INTERNAL_H
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#define AVFORMAT_INTERNAL_H
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2008-08-28 01:43:28 +02:00
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2008-10-04 13:20:02 +02:00
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#include <stdint.h>
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2008-12-03 17:47:07 +01:00
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#include "avformat.h"
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2008-10-04 13:20:02 +02:00
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2010-08-19 16:50:40 +02:00
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#define MAX_URL_SIZE 4096
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2011-05-27 20:34:01 +02:00
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#ifdef DEBUG
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# define hex_dump_debug(class, buf, size) av_hex_dump_log(class, AV_LOG_DEBUG, buf, size)
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#else
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# define hex_dump_debug(class, buf, size)
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#endif
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2010-05-22 18:01:32 +02:00
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typedef struct AVCodecTag {
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enum CodecID id;
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unsigned int tag;
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} AVCodecTag;
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2010-04-11 23:44:23 +02:00
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#ifdef __GNUC__
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#define dynarray_add(tab, nb_ptr, elem)\
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do {\
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__typeof__(tab) _tab = (tab);\
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__typeof__(elem) _elem = (elem);\
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(void)sizeof(**_tab == _elem); /* check that types are compatible */\
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2011-04-29 17:33:38 +02:00
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av_dynarray_add(_tab, nb_ptr, _elem);\
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2010-04-11 23:44:23 +02:00
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} while(0)
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#else
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#define dynarray_add(tab, nb_ptr, elem)\
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do {\
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2011-04-29 17:33:38 +02:00
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av_dynarray_add((tab), nb_ptr, (elem));\
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2010-04-11 23:44:23 +02:00
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} while(0)
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#endif
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2012-02-15 10:28:39 +01:00
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struct tm *ff_brktimegm(time_t secs, struct tm *tm);
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2010-04-11 23:44:23 +02:00
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2010-03-25 08:13:20 +01:00
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char *ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase);
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2008-08-28 01:43:28 +02:00
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2010-08-09 12:05:33 +02:00
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/**
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* Parse a string of hexadecimal strings. Any space between the hexadecimal
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* digits is ignored.
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*
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* @param data if non-null, the parsed data is written to this pointer
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* @param p the string to parse
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* @return the number of bytes written (or to be written, if data is null)
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*/
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int ff_hex_to_data(uint8_t *data, const char *p);
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2010-03-16 00:14:07 +01:00
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void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx);
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2008-12-03 17:47:07 +01:00
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2009-02-08 22:14:46 +01:00
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/**
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* Add packet to AVFormatContext->packet_buffer list, determining its
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* interleaved position using compare() function argument.
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2011-11-08 10:35:14 +01:00
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* @return 0, or < 0 on error
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2009-02-08 22:14:46 +01:00
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*/
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2011-11-08 10:35:14 +01:00
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int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
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2009-02-08 22:14:46 +01:00
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int (*compare)(AVFormatContext *, AVPacket *, AVPacket *));
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2010-03-16 00:15:24 +01:00
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void ff_read_frame_flush(AVFormatContext *s);
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2010-03-07 00:19:05 +01:00
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2010-03-15 11:36:30 +01:00
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#define NTP_OFFSET 2208988800ULL
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#define NTP_OFFSET_US (NTP_OFFSET * 1000000ULL)
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2010-06-30 17:38:06 +02:00
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/** Get the current time since NTP epoch in microseconds. */
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2010-03-10 23:21:39 +01:00
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uint64_t ff_ntp_time(void);
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2010-03-15 00:59:48 +01:00
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/**
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2010-06-30 17:38:06 +02:00
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* Assemble a URL string from components. This is the reverse operation
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2010-06-27 16:16:46 +02:00
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* of av_url_split.
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2010-03-15 00:59:48 +01:00
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*
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* Note, this requires networking to be initialized, so the caller must
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* ensure ff_network_init has been called.
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*
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2010-06-27 16:16:46 +02:00
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* @see av_url_split
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2010-03-15 00:59:48 +01:00
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*
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* @param str the buffer to fill with the url
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* @param size the size of the str buffer
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* @param proto the protocol identifier, if null, the separator
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* after the identifier is left out, too
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2010-06-19 23:56:50 +02:00
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* @param authorization an optional authorization string, may be null.
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* An empty string is treated the same as a null string.
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2010-03-15 00:59:48 +01:00
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* @param hostname the host name string
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* @param port the port number, left out from the string if negative
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* @param fmt a generic format string for everything to add after the
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* host/port, may be null
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* @return the number of characters written to the destination buffer
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*/
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int ff_url_join(char *str, int size, const char *proto,
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const char *authorization, const char *hostname,
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2011-06-17 09:31:11 +02:00
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int port, const char *fmt, ...) av_printf_format(7, 8);
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2010-03-15 00:59:48 +01:00
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2010-05-18 21:32:59 +02:00
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/**
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2010-06-30 17:38:06 +02:00
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* Append the media-specific SDP fragment for the media stream c
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2010-05-18 21:32:59 +02:00
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* to the buffer buff.
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*
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* Note, the buffer needs to be initialized, since it is appended to
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* existing content.
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*
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* @param buff the buffer to append the SDP fragment to
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* @param size the size of the buff buffer
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* @param c the AVCodecContext of the media to describe
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* @param dest_addr the destination address of the media stream, may be NULL
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2010-08-25 14:29:32 +02:00
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* @param dest_type the destination address type, may be NULL
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2010-05-18 21:32:59 +02:00
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* @param port the destination port of the media stream, 0 if unknown
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* @param ttl the time to live of the stream, 0 if not multicast
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2011-05-18 14:41:06 +02:00
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* @param fmt the AVFormatContext, which might contain options modifying
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* the generated SDP
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2010-05-18 21:32:59 +02:00
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*/
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void ff_sdp_write_media(char *buff, int size, AVCodecContext *c,
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2010-08-25 14:29:32 +02:00
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const char *dest_addr, const char *dest_type,
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2011-05-18 14:41:06 +02:00
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int port, int ttl, AVFormatContext *fmt);
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2010-05-18 21:32:59 +02:00
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2010-05-21 09:07:57 +02:00
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/**
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* Write a packet to another muxer than the one the user originally
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* intended. Useful when chaining muxers, where one muxer internally
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* writes a received packet to another muxer.
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*
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* @param dst the muxer to write the packet to
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* @param dst_stream the stream index within dst to write the packet to
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* @param pkt the packet to be written
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* @param src the muxer the packet originally was intended for
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* @return the value av_write_frame returned
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*/
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int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
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AVFormatContext *src);
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2010-07-09 14:14:33 +02:00
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/**
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* Get the length in bytes which is needed to store val as v.
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*/
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int ff_get_v_length(uint64_t val);
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/**
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* Put val using a variable number of bytes.
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*/
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2011-02-20 11:04:12 +01:00
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void ff_put_v(AVIOContext *bc, uint64_t val);
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2010-07-09 14:14:33 +02:00
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2010-07-21 23:40:50 +02:00
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/**
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2011-02-20 11:04:12 +01:00
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* Read a whole line of text from AVIOContext. Stop reading after reaching
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2011-07-03 16:33:25 +02:00
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* either a \\n, a \\0 or EOF. The returned string is always \\0-terminated,
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2010-07-21 23:40:50 +02:00
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* and may be truncated if the buffer is too small.
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*
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2011-02-20 11:04:12 +01:00
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* @param s the read-only AVIOContext
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2010-07-21 23:40:50 +02:00
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* @param buf buffer to store the read line
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* @param maxlen size of the buffer
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* @return the length of the string written in the buffer, not including the
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2011-07-03 16:33:25 +02:00
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* final \\0
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2010-07-21 23:40:50 +02:00
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*/
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2011-02-20 11:04:12 +01:00
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int ff_get_line(AVIOContext *s, char *buf, int maxlen);
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2010-07-21 23:39:01 +02:00
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2010-07-16 16:12:52 +02:00
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#define SPACE_CHARS " \t\r\n"
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2010-08-19 16:49:53 +02:00
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/**
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* Callback function type for ff_parse_key_value.
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*
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* @param key a pointer to the key
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* @param key_len the number of bytes that belong to the key, including the '='
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* char
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* @param dest return the destination pointer for the value in *dest, may
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* be null to ignore the value
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* @param dest_len the length of the *dest buffer
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*/
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typedef void (*ff_parse_key_val_cb)(void *context, const char *key,
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int key_len, char **dest, int *dest_len);
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/**
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* Parse a string with comma-separated key=value pairs. The value strings
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* may be quoted and may contain escaped characters within quoted strings.
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*
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* @param str the string to parse
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* @param callback_get_buf function that returns where to store the
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* unescaped value string.
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* @param context the opaque context pointer to pass to callback_get_buf
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*/
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void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
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void *context);
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2010-12-26 02:24:51 +01:00
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/**
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* Find stream index based on format-specific stream ID
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* @return stream index, or < 0 on error
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*/
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int ff_find_stream_index(AVFormatContext *s, int id);
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2011-01-22 10:03:22 +01:00
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/**
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* Internal version of av_index_search_timestamp
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*/
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int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
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int64_t wanted_timestamp, int flags);
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/**
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* Internal version of av_add_index_entry
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*/
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int ff_add_index_entry(AVIndexEntry **index_entries,
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int *nb_index_entries,
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unsigned int *index_entries_allocated_size,
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int64_t pos, int64_t timestamp, int size, int distance, int flags);
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2011-02-06 15:38:55 +01:00
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/**
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* Add a new chapter.
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*
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* @param s media file handle
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* @param id unique ID for this chapter
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* @param start chapter start time in time_base units
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* @param end chapter end time in time_base units
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* @param title chapter title
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*
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* @return AVChapter or NULL on error
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*/
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2011-10-17 08:58:50 +02:00
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AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base,
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int64_t start, int64_t end, const char *title);
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2011-02-06 15:38:55 +01:00
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/**
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* Ensure the index uses less memory than the maximum specified in
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* AVFormatContext.max_index_size by discarding entries if it grows
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* too large.
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*/
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void ff_reduce_index(AVFormatContext *s, int stream_index);
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2011-03-17 11:24:23 +01:00
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/*
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* Convert a relative url into an absolute url, given a base url.
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*
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* @param buf the buffer where output absolute url is written
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* @param size the size of buf
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* @param base the base url, may be equal to buf.
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* @param rel the new url, which is interpreted relative to base
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*/
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void ff_make_absolute_url(char *buf, int size, const char *base,
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const char *rel);
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2011-04-05 13:13:53 +02:00
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enum CodecID ff_guess_image2_codec(const char *filename);
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2011-07-13 11:45:17 +02:00
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/**
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* Convert a date string in ISO8601 format to Unix timestamp.
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*/
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int64_t ff_iso8601_to_unix_time(const char *datestr);
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2011-10-16 15:03:30 +02:00
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/**
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* Perform a binary search using av_index_search_timestamp() and
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* AVInputFormat.read_timestamp().
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*
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* @param target_ts target timestamp in the time base of the given stream
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* @param stream_index stream number
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*/
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int ff_seek_frame_binary(AVFormatContext *s, int stream_index,
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int64_t target_ts, int flags);
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/**
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* Update cur_dts of all streams based on the given timestamp and AVStream.
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*
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* Stream ref_st unchanged, others set cur_dts in their native time base.
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* Only needed for timestamp wrapping or if (dts not set and pts!=dts).
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* @param timestamp new dts expressed in time_base of param ref_st
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* @param ref_st reference stream giving time_base of param timestamp
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*/
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void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp);
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/**
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* Perform a binary search using read_timestamp().
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*
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* @param target_ts target timestamp in the time base of the given stream
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* @param stream_index stream number
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*/
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int64_t ff_gen_search(AVFormatContext *s, int stream_index,
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int64_t target_ts, int64_t pos_min,
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int64_t pos_max, int64_t pos_limit,
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int64_t ts_min, int64_t ts_max,
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int flags, int64_t *ts_ret,
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int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
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2011-11-29 19:28:15 +01:00
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/**
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* Set the pts for a given stream. If the new values would be invalid
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* (<= 0), it leaves the AVStream unchanged.
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*
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* @param s stream
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* @param pts_wrap_bits number of bits effectively used by the pts
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* (used for wrap control, 33 is the value for MPEG)
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* @param pts_num numerator to convert to seconds (MPEG: 1)
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* @param pts_den denominator to convert to seconds (MPEG: 90000)
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*/
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void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
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unsigned int pts_num, unsigned int pts_den);
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2011-12-16 11:48:09 +01:00
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/**
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* Add side data to a packet for changing parameters to the given values.
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* Parameters set to 0 aren't included in the change.
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*/
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int ff_add_param_change(AVPacket *pkt, int32_t channels,
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uint64_t channel_layout, int32_t sample_rate,
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int32_t width, int32_t height);
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2012-02-02 14:20:43 +01:00
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/**
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* Set the timebase for each stream from the corresponding codec timebase and
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* print it.
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*/
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int ff_framehash_write_header(AVFormatContext *s);
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2008-08-31 09:39:47 +02:00
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#endif /* AVFORMAT_INTERNAL_H */
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