yading@11: /*
yading@11:  * copyright (c) 2001 Fabrice Bellard
yading@11:  *
yading@11:  * This file is part of FFmpeg.
yading@11:  *
yading@11:  * FFmpeg is free software; you can redistribute it and/or
yading@11:  * modify it under the terms of the GNU Lesser General Public
yading@11:  * License as published by the Free Software Foundation; either
yading@11:  * version 2.1 of the License, or (at your option) any later version.
yading@11:  *
yading@11:  * FFmpeg is distributed in the hope that it will be useful,
yading@11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@11:  * Lesser General Public License for more details.
yading@11:  *
yading@11:  * You should have received a copy of the GNU Lesser General Public
yading@11:  * License along with FFmpeg; if not, write to the Free Software
yading@11:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@11:  */
yading@11: 
yading@11: #ifndef AVFORMAT_INTERNAL_H
yading@11: #define AVFORMAT_INTERNAL_H
yading@11: 
yading@11: #include <stdint.h>
yading@11: #include "avformat.h"
yading@11: 
yading@11: #define MAX_URL_SIZE 4096
yading@11: 
yading@11: #ifdef DEBUG
yading@11: #    define hex_dump_debug(class, buf, size) av_hex_dump_log(class, AV_LOG_DEBUG, buf, size)
yading@11: #else
yading@11: #    define hex_dump_debug(class, buf, size)
yading@11: #endif
yading@11: 
yading@11: typedef struct AVCodecTag {
yading@11:     enum AVCodecID id;
yading@11:     unsigned int tag;
yading@11: } AVCodecTag;
yading@11: 
yading@11: typedef struct CodecMime{
yading@11:     char str[32];
yading@11:     enum AVCodecID id;
yading@11: } CodecMime;
yading@11: 
yading@11: #ifdef __GNUC__
yading@11: #define dynarray_add(tab, nb_ptr, elem)\
yading@11: do {\
yading@11:     __typeof__(tab) _tab = (tab);\
yading@11:     __typeof__(elem) _elem = (elem);\
yading@11:     (void)sizeof(**_tab == _elem); /* check that types are compatible */\
yading@11:     av_dynarray_add(_tab, nb_ptr, _elem);\
yading@11: } while(0)
yading@11: #else
yading@11: #define dynarray_add(tab, nb_ptr, elem)\
yading@11: do {\
yading@11:     av_dynarray_add((tab), nb_ptr, (elem));\
yading@11: } while(0)
yading@11: #endif
yading@11: 
yading@11: struct tm *ff_brktimegm(time_t secs, struct tm *tm);
yading@11: 
yading@11: char *ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase);
yading@11: 
yading@11: /**
yading@11:  * Parse a string of hexadecimal strings. Any space between the hexadecimal
yading@11:  * digits is ignored.
yading@11:  *
yading@11:  * @param data if non-null, the parsed data is written to this pointer
yading@11:  * @param p the string to parse
yading@11:  * @return the number of bytes written (or to be written, if data is null)
yading@11:  */
yading@11: int ff_hex_to_data(uint8_t *data, const char *p);
yading@11: 
yading@11: void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx);
yading@11: 
yading@11: /**
yading@11:  * Add packet to AVFormatContext->packet_buffer list, determining its
yading@11:  * interleaved position using compare() function argument.
yading@11:  * @return 0, or < 0 on error
yading@11:  */
yading@11: int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
yading@11:                               int (*compare)(AVFormatContext *, AVPacket *, AVPacket *));
yading@11: 
yading@11: void ff_read_frame_flush(AVFormatContext *s);
yading@11: 
yading@11: #define NTP_OFFSET 2208988800ULL
yading@11: #define NTP_OFFSET_US (NTP_OFFSET * 1000000ULL)
yading@11: 
yading@11: /** Get the current time since NTP epoch in microseconds. */
yading@11: uint64_t ff_ntp_time(void);
yading@11: 
yading@11: /**
yading@11:  * Assemble a URL string from components. This is the reverse operation
yading@11:  * of av_url_split.
yading@11:  *
yading@11:  * Note, this requires networking to be initialized, so the caller must
yading@11:  * ensure ff_network_init has been called.
yading@11:  *
yading@11:  * @see av_url_split
yading@11:  *
yading@11:  * @param str the buffer to fill with the url
yading@11:  * @param size the size of the str buffer
yading@11:  * @param proto the protocol identifier, if null, the separator
yading@11:  *              after the identifier is left out, too
yading@11:  * @param authorization an optional authorization string, may be null.
yading@11:  *                      An empty string is treated the same as a null string.
yading@11:  * @param hostname the host name string
yading@11:  * @param port the port number, left out from the string if negative
yading@11:  * @param fmt a generic format string for everything to add after the
yading@11:  *            host/port, may be null
yading@11:  * @return the number of characters written to the destination buffer
yading@11:  */
yading@11: int ff_url_join(char *str, int size, const char *proto,
yading@11:                 const char *authorization, const char *hostname,
yading@11:                 int port, const char *fmt, ...) av_printf_format(7, 8);
yading@11: 
yading@11: /**
yading@11:  * Append the media-specific SDP fragment for the media stream c
yading@11:  * to the buffer buff.
yading@11:  *
yading@11:  * Note, the buffer needs to be initialized, since it is appended to
yading@11:  * existing content.
yading@11:  *
yading@11:  * @param buff the buffer to append the SDP fragment to
yading@11:  * @param size the size of the buff buffer
yading@11:  * @param st the AVStream of the media to describe
yading@11:  * @param idx the global stream index
yading@11:  * @param dest_addr the destination address of the media stream, may be NULL
yading@11:  * @param dest_type the destination address type, may be NULL
yading@11:  * @param port the destination port of the media stream, 0 if unknown
yading@11:  * @param ttl the time to live of the stream, 0 if not multicast
yading@11:  * @param fmt the AVFormatContext, which might contain options modifying
yading@11:  *            the generated SDP
yading@11:  */
yading@11: void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx,
yading@11:                         const char *dest_addr, const char *dest_type,
yading@11:                         int port, int ttl, AVFormatContext *fmt);
yading@11: 
yading@11: /**
yading@11:  * Write a packet to another muxer than the one the user originally
yading@11:  * intended. Useful when chaining muxers, where one muxer internally
yading@11:  * writes a received packet to another muxer.
yading@11:  *
yading@11:  * @param dst the muxer to write the packet to
yading@11:  * @param dst_stream the stream index within dst to write the packet to
yading@11:  * @param pkt the packet to be written
yading@11:  * @param src the muxer the packet originally was intended for
yading@11:  * @return the value av_write_frame returned
yading@11:  */
yading@11: int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
yading@11:                      AVFormatContext *src);
yading@11: 
yading@11: /**
yading@11:  * Get the length in bytes which is needed to store val as v.
yading@11:  */
yading@11: int ff_get_v_length(uint64_t val);
yading@11: 
yading@11: /**
yading@11:  * Put val using a variable number of bytes.
yading@11:  */
yading@11: void ff_put_v(AVIOContext *bc, uint64_t val);
yading@11: 
yading@11: /**
yading@11:  * Read a whole line of text from AVIOContext. Stop reading after reaching
yading@11:  * either a \\n, a \\0 or EOF. The returned string is always \\0-terminated,
yading@11:  * and may be truncated if the buffer is too small.
yading@11:  *
yading@11:  * @param s the read-only AVIOContext
yading@11:  * @param buf buffer to store the read line
yading@11:  * @param maxlen size of the buffer
yading@11:  * @return the length of the string written in the buffer, not including the
yading@11:  *         final \\0
yading@11:  */
yading@11: int ff_get_line(AVIOContext *s, char *buf, int maxlen);
yading@11: 
yading@11: #define SPACE_CHARS " \t\r\n"
yading@11: 
yading@11: /**
yading@11:  * Callback function type for ff_parse_key_value.
yading@11:  *
yading@11:  * @param key a pointer to the key
yading@11:  * @param key_len the number of bytes that belong to the key, including the '='
yading@11:  *                char
yading@11:  * @param dest return the destination pointer for the value in *dest, may
yading@11:  *             be null to ignore the value
yading@11:  * @param dest_len the length of the *dest buffer
yading@11:  */
yading@11: typedef void (*ff_parse_key_val_cb)(void *context, const char *key,
yading@11:                                     int key_len, char **dest, int *dest_len);
yading@11: /**
yading@11:  * Parse a string with comma-separated key=value pairs. The value strings
yading@11:  * may be quoted and may contain escaped characters within quoted strings.
yading@11:  *
yading@11:  * @param str the string to parse
yading@11:  * @param callback_get_buf function that returns where to store the
yading@11:  *                         unescaped value string.
yading@11:  * @param context the opaque context pointer to pass to callback_get_buf
yading@11:  */
yading@11: void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
yading@11:                         void *context);
yading@11: 
yading@11: /**
yading@11:  * Find stream index based on format-specific stream ID
yading@11:  * @return stream index, or < 0 on error
yading@11:  */
yading@11: int ff_find_stream_index(AVFormatContext *s, int id);
yading@11: 
yading@11: /**
yading@11:  * Internal version of av_index_search_timestamp
yading@11:  */
yading@11: int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
yading@11:                               int64_t wanted_timestamp, int flags);
yading@11: 
yading@11: /**
yading@11:  * Internal version of av_add_index_entry
yading@11:  */
yading@11: int ff_add_index_entry(AVIndexEntry **index_entries,
yading@11:                        int *nb_index_entries,
yading@11:                        unsigned int *index_entries_allocated_size,
yading@11:                        int64_t pos, int64_t timestamp, int size, int distance, int flags);
yading@11: 
yading@11: /**
yading@11:  * Add a new chapter.
yading@11:  *
yading@11:  * @param s media file handle
yading@11:  * @param id unique ID for this chapter
yading@11:  * @param start chapter start time in time_base units
yading@11:  * @param end chapter end time in time_base units
yading@11:  * @param title chapter title
yading@11:  *
yading@11:  * @return AVChapter or NULL on error
yading@11:  */
yading@11: AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base,
yading@11:                               int64_t start, int64_t end, const char *title);
yading@11: 
yading@11: /**
yading@11:  * Ensure the index uses less memory than the maximum specified in
yading@11:  * AVFormatContext.max_index_size by discarding entries if it grows
yading@11:  * too large.
yading@11:  */
yading@11: void ff_reduce_index(AVFormatContext *s, int stream_index);
yading@11: 
yading@11: /**
yading@11:  * Convert a relative url into an absolute url, given a base url.
yading@11:  *
yading@11:  * @param buf the buffer where output absolute url is written
yading@11:  * @param size the size of buf
yading@11:  * @param base the base url, may be equal to buf.
yading@11:  * @param rel the new url, which is interpreted relative to base
yading@11:  */
yading@11: void ff_make_absolute_url(char *buf, int size, const char *base,
yading@11:                           const char *rel);
yading@11: 
yading@11: enum AVCodecID ff_guess_image2_codec(const char *filename);
yading@11: 
yading@11: /**
yading@11:  * Convert a date string in ISO8601 format to Unix timestamp.
yading@11:  */
yading@11: int64_t ff_iso8601_to_unix_time(const char *datestr);
yading@11: 
yading@11: /**
yading@11:  * Perform a binary search using av_index_search_timestamp() and
yading@11:  * AVInputFormat.read_timestamp().
yading@11:  *
yading@11:  * @param target_ts target timestamp in the time base of the given stream
yading@11:  * @param stream_index stream number
yading@11:  */
yading@11: int ff_seek_frame_binary(AVFormatContext *s, int stream_index,
yading@11:                          int64_t target_ts, int flags);
yading@11: 
yading@11: /**
yading@11:  * Update cur_dts of all streams based on the given timestamp and AVStream.
yading@11:  *
yading@11:  * Stream ref_st unchanged, others set cur_dts in their native time base.
yading@11:  * Only needed for timestamp wrapping or if (dts not set and pts!=dts).
yading@11:  * @param timestamp new dts expressed in time_base of param ref_st
yading@11:  * @param ref_st reference stream giving time_base of param timestamp
yading@11:  */
yading@11: void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp);
yading@11: 
yading@11: /**
yading@11:  * Perform a binary search using read_timestamp().
yading@11:  *
yading@11:  * @param target_ts target timestamp in the time base of the given stream
yading@11:  * @param stream_index stream number
yading@11:  */
yading@11: int64_t ff_gen_search(AVFormatContext *s, int stream_index,
yading@11:                       int64_t target_ts, int64_t pos_min,
yading@11:                       int64_t pos_max, int64_t pos_limit,
yading@11:                       int64_t ts_min, int64_t ts_max,
yading@11:                       int flags, int64_t *ts_ret,
yading@11:                       int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
yading@11: 
yading@11: /**
yading@11:  * Set the time base and wrapping info for a given stream. This will be used
yading@11:  * to interpret the stream's timestamps. If the new time base is invalid
yading@11:  * (numerator or denominator are non-positive), it leaves the stream
yading@11:  * unchanged.
yading@11:  *
yading@11:  * @param s stream
yading@11:  * @param pts_wrap_bits number of bits effectively used by the pts
yading@11:  *        (used for wrap control)
yading@11:  * @param pts_num time base numerator
yading@11:  * @param pts_den time base denominator
yading@11:  */
yading@11: void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
yading@11:                          unsigned int pts_num, unsigned int pts_den);
yading@11: 
yading@11: /**
yading@11:  * Add side data to a packet for changing parameters to the given values.
yading@11:  * Parameters set to 0 aren't included in the change.
yading@11:  */
yading@11: int ff_add_param_change(AVPacket *pkt, int32_t channels,
yading@11:                         uint64_t channel_layout, int32_t sample_rate,
yading@11:                         int32_t width, int32_t height);
yading@11: 
yading@11: /**
yading@11:  * Set the timebase for each stream from the corresponding codec timebase and
yading@11:  * print it.
yading@11:  */
yading@11: int ff_framehash_write_header(AVFormatContext *s);
yading@11: 
yading@11: /**
yading@11:  * Read a transport packet from a media file.
yading@11:  *
yading@11:  * @param s media file handle
yading@11:  * @param pkt is filled
yading@11:  * @return 0 if OK, AVERROR_xxx on error
yading@11:  */
yading@11: int ff_read_packet(AVFormatContext *s, AVPacket *pkt);
yading@11: 
yading@11: /**
yading@11:  * Interleave a packet per dts in an output media file.
yading@11:  *
yading@11:  * Packets with pkt->destruct == av_destruct_packet will be freed inside this
yading@11:  * function, so they cannot be used after it. Note that calling av_free_packet()
yading@11:  * on them is still safe.
yading@11:  *
yading@11:  * @param s media file handle
yading@11:  * @param out the interleaved packet will be output here
yading@11:  * @param pkt the input packet
yading@11:  * @param flush 1 if no further packets are available as input and all
yading@11:  *              remaining packets should be output
yading@11:  * @return 1 if a packet was output, 0 if no packet could be output,
yading@11:  *         < 0 if an error occurred
yading@11:  */
yading@11: int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
yading@11:                                  AVPacket *pkt, int flush);
yading@11: 
yading@11: void ff_free_stream(AVFormatContext *s, AVStream *st);
yading@11: 
yading@11: /**
yading@11:  * Return the frame duration in seconds. Return 0 if not available.
yading@11:  */
yading@11: void ff_compute_frame_duration(int *pnum, int *pden, AVStream *st,
yading@11:                                AVCodecParserContext *pc, AVPacket *pkt);
yading@11: 
yading@11: int ff_get_audio_frame_size(AVCodecContext *enc, int size, int mux);
yading@11: 
yading@11: unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id);
yading@11: 
yading@11: enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag);
yading@11: 
yading@11: /**
yading@11:  * Select a PCM codec based on the given parameters.
yading@11:  *
yading@11:  * @param bps     bits-per-sample
yading@11:  * @param flt     floating-point
yading@11:  * @param be      big-endian
yading@11:  * @param sflags  signed flags. each bit corresponds to one byte of bit depth.
yading@11:  *                e.g. the 1st bit indicates if 8-bit should be signed or
yading@11:  *                unsigned, the 2nd bit indicates if 16-bit should be signed or
yading@11:  *                unsigned, etc... This is useful for formats such as WAVE where
yading@11:  *                only 8-bit is unsigned and all other bit depths are signed.
yading@11:  * @return        a PCM codec id or AV_CODEC_ID_NONE
yading@11:  */
yading@11: enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags);
yading@11: 
yading@11: /**
yading@11:  * Chooses a timebase for muxing the specified stream.
yading@11:  *
yading@11:  * The choosen timebase allows sample accurate timestamps based
yading@11:  * on the framerate or sample rate for audio streams. It also is
yading@11:  * at least as precisse as 1/min_precission would be.
yading@11:  */
yading@11: AVRational ff_choose_timebase(AVFormatContext *s, AVStream *st, int min_precission);
yading@11: 
yading@11: /**
yading@11:  * Generate standard extradata for AVC-Intra based on width/height and field order.
yading@11:  */
yading@11: void ff_generate_avci_extradata(AVStream *st);
yading@11: 
yading@11: int ff_http_match_no_proxy(const char *no_proxy, const char *hostname);
yading@11: 
yading@11: #endif /* AVFORMAT_INTERNAL_H */