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