3f4c2bf99b
This should prevent its direct inclusion in an external project, which results broken if avformat.h is not included before. Originally committed as revision 17626 to svn://svn.ffmpeg.org/ffmpeg/trunk
1304 lines
45 KiB
C
1304 lines
45 KiB
C
/*
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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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#ifndef AVFORMAT_AVFORMAT_H
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#define AVFORMAT_AVFORMAT_H
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#define LIBAVFORMAT_VERSION_MAJOR 52
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#define LIBAVFORMAT_VERSION_MINOR 30
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#define LIBAVFORMAT_VERSION_MICRO 1
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#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
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LIBAVFORMAT_VERSION_MINOR, \
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LIBAVFORMAT_VERSION_MICRO)
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#define LIBAVFORMAT_VERSION AV_VERSION(LIBAVFORMAT_VERSION_MAJOR, \
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LIBAVFORMAT_VERSION_MINOR, \
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LIBAVFORMAT_VERSION_MICRO)
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#define LIBAVFORMAT_BUILD LIBAVFORMAT_VERSION_INT
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#define LIBAVFORMAT_IDENT "Lavf" AV_STRINGIFY(LIBAVFORMAT_VERSION)
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/**
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* Returns the LIBAVFORMAT_VERSION_INT constant.
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*/
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unsigned avformat_version(void);
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#include <time.h>
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#include <stdio.h> /* FILE */
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#include "libavcodec/avcodec.h"
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#include "avio.h"
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/*
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* Public Metadata API.
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* !!WARNING!! This is a work in progress. Don't use outside FFmpeg for now.
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* The metadata API allows libavformat to export metadata tags to a client
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* application using a sequence of key/value pairs.
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* Important concepts to keep in mind:
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* 1. Keys are unique; there can never be 2 tags with the same key. This is
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* also meant semantically, i.e., a demuxer should not knowingly produce
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* several keys that are literally different but semantically identical.
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* E.g., key=Author5, key=Author6. In this example, all authors must be
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* placed in the same tag.
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* 2. Metadata is flat, not hierarchical; there are no subtags. If you
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* want to store, e.g., the email address of the child of producer Alice
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* and actor Bob, that could have key=alice_and_bobs_childs_email_address.
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* 3. A tag whose value is localized for a particular language is appended
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* with a dash character ('-') and the ISO 639 3-letter language code.
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* For example: Author-ger=Michael, Author-eng=Mike
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* The original/default language is in the unqualified "Author" tag.
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* A demuxer should set a default if it sets any translated tag.
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*/
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#define AV_METADATA_MATCH_CASE 1
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#define AV_METADATA_IGNORE_SUFFIX 2
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typedef struct {
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char *key;
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char *value;
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}AVMetadataTag;
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typedef struct AVMetadata AVMetadata;
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/**
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* Gets a metadata element with matching key.
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* @param prev Set to the previous matching element to find the next.
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* @param flags Allows case as well as suffix-insensitive comparisons.
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* @return Found tag or NULL, changing key or value leads to undefined behavior.
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*/
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AVMetadataTag *
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av_metadata_get(AVMetadata *m, const char *key, const AVMetadataTag *prev, int flags);
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/**
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* Sets the given tag in m, overwriting an existing tag.
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* @param key tag key to add to m (will be av_strduped)
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* @param value tag value to add to m (will be av_strduped)
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* @return >= 0 on success otherwise an error code <0
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*/
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int av_metadata_set(AVMetadata **pm, const char *key, const char *value);
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/**
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* Frees all the memory allocated for an AVMetadata struct.
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*/
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void av_metadata_free(AVMetadata **m);
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/* packet functions */
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typedef struct AVPacket {
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/**
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* Presentation timestamp in time_base units; the time at which the
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* decompressed packet will be presented to the user.
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* Can be AV_NOPTS_VALUE if it is not stored in the file.
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* pts MUST be larger or equal to dts as presentation cannot happen before
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* decompression, unless one wants to view hex dumps. Some formats misuse
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* the terms dts and pts/cts to mean something different. Such timestamps
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* must be converted to true pts/dts before they are stored in AVPacket.
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*/
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int64_t pts;
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/**
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* Decompression timestamp in time_base units; the time at which the
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* packet is decompressed.
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* Can be AV_NOPTS_VALUE if it is not stored in the file.
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*/
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int64_t dts;
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uint8_t *data;
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int size;
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int stream_index;
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int flags;
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/**
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* Duration of this packet in time_base units, 0 if unknown.
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* Equals next_pts - this_pts in presentation order.
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*/
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int duration;
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void (*destruct)(struct AVPacket *);
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void *priv;
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int64_t pos; ///< byte position in stream, -1 if unknown
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/**
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* Time difference in stream time base units from the pts of this
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* packet to the point at which the output from the decoder has converged
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* independent from the availability of previous frames. That is, the
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* frames are virtually identical no matter if decoding started from
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* the very first frame or from this keyframe.
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* Is AV_NOPTS_VALUE if unknown.
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* This field is not the display duration of the current packet.
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*
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* The purpose of this field is to allow seeking in streams that have no
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* keyframes in the conventional sense. It corresponds to the
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* recovery point SEI in H.264 and match_time_delta in NUT. It is also
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* essential for some types of subtitle streams to ensure that all
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* subtitles are correctly displayed after seeking.
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*/
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int64_t convergence_duration;
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} AVPacket;
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#define PKT_FLAG_KEY 0x0001
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void av_destruct_packet_nofree(AVPacket *pkt);
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/**
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* Default packet destructor.
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*/
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void av_destruct_packet(AVPacket *pkt);
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/**
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* Initialize optional fields of a packet with default values.
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*
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* @param pkt packet
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*/
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void av_init_packet(AVPacket *pkt);
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/**
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* Allocate the payload of a packet and initialize its fields with
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* default values.
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*
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* @param pkt packet
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* @param size wanted payload size
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* @return 0 if OK, AVERROR_xxx otherwise
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*/
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int av_new_packet(AVPacket *pkt, int size);
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/**
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* Allocate and read the payload of a packet and initialize its fields with
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* default values.
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*
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* @param pkt packet
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* @param size desired payload size
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* @return >0 (read size) if OK, AVERROR_xxx otherwise
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*/
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int av_get_packet(ByteIOContext *s, AVPacket *pkt, int size);
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/**
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* @warning This is a hack - the packet memory allocation stuff is broken. The
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* packet is allocated if it was not really allocated.
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*/
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int av_dup_packet(AVPacket *pkt);
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/**
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* Free a packet.
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*
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* @param pkt packet to free
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*/
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static inline void av_free_packet(AVPacket *pkt)
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{
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if (pkt && pkt->destruct) {
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pkt->destruct(pkt);
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}
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}
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/*************************************************/
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/* fractional numbers for exact pts handling */
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/**
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* The exact value of the fractional number is: 'val + num / den'.
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* num is assumed to be 0 <= num < den.
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*/
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typedef struct AVFrac {
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int64_t val, num, den;
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} AVFrac;
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/*************************************************/
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/* input/output formats */
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struct AVCodecTag;
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struct AVFormatContext;
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/** This structure contains the data a format has to probe a file. */
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typedef struct AVProbeData {
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const char *filename;
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unsigned char *buf;
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int buf_size;
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} AVProbeData;
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#define AVPROBE_SCORE_MAX 100 ///< maximum score, half of that is used for file-extension-based detection
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#define AVPROBE_PADDING_SIZE 32 ///< extra allocated bytes at the end of the probe buffer
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typedef struct AVFormatParameters {
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AVRational time_base;
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int sample_rate;
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int channels;
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int width;
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int height;
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enum PixelFormat pix_fmt;
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int channel; /**< Used to select DV channel. */
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const char *standard; /**< TV standard, NTSC, PAL, SECAM */
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unsigned int mpeg2ts_raw:1; /**< Force raw MPEG-2 transport stream output, if possible. */
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unsigned int mpeg2ts_compute_pcr:1; /**< Compute exact PCR for each transport
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stream packet (only meaningful if
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mpeg2ts_raw is TRUE). */
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unsigned int initial_pause:1; /**< Do not begin to play the stream
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immediately (RTSP only). */
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unsigned int prealloced_context:1;
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#if LIBAVFORMAT_VERSION_INT < (53<<16)
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enum CodecID video_codec_id;
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enum CodecID audio_codec_id;
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#endif
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} AVFormatParameters;
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//! Demuxer will use url_fopen, no opened file should be provided by the caller.
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#define AVFMT_NOFILE 0x0001
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#define AVFMT_NEEDNUMBER 0x0002 /**< Needs '%d' in filename. */
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#define AVFMT_SHOW_IDS 0x0008 /**< Show format stream IDs numbers. */
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#define AVFMT_RAWPICTURE 0x0020 /**< Format wants AVPicture structure for
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raw picture data. */
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#define AVFMT_GLOBALHEADER 0x0040 /**< Format wants global header. */
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#define AVFMT_NOTIMESTAMPS 0x0080 /**< Format does not need / have any timestamps. */
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#define AVFMT_GENERIC_INDEX 0x0100 /**< Use generic index building code. */
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#define AVFMT_TS_DISCONT 0x0200 /**< Format allows timestamp discontinuities. */
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#define AVFMT_VARIABLE_FPS 0x0400 /**< Format allows variable fps. */
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typedef struct AVOutputFormat {
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const char *name;
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/**
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* Descriptive name for the format, meant to be more human-readable
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* than \p name. You \e should use the NULL_IF_CONFIG_SMALL() macro
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* to define it.
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*/
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const char *long_name;
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const char *mime_type;
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const char *extensions; /**< comma-separated filename extensions */
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/** size of private data so that it can be allocated in the wrapper */
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int priv_data_size;
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/* output support */
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enum CodecID audio_codec; /**< default audio codec */
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enum CodecID video_codec; /**< default video codec */
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int (*write_header)(struct AVFormatContext *);
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int (*write_packet)(struct AVFormatContext *, AVPacket *pkt);
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int (*write_trailer)(struct AVFormatContext *);
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/** can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_GLOBALHEADER */
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int flags;
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/** Currently only used to set pixel format if not YUV420P. */
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int (*set_parameters)(struct AVFormatContext *, AVFormatParameters *);
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int (*interleave_packet)(struct AVFormatContext *, AVPacket *out,
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AVPacket *in, int flush);
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/**
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* List of supported codec_id-codec_tag pairs, ordered by "better
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* choice first". The arrays are all terminated by CODEC_ID_NONE.
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*/
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const struct AVCodecTag * const *codec_tag;
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enum CodecID subtitle_codec; /**< default subtitle codec */
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/* private fields */
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struct AVOutputFormat *next;
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} AVOutputFormat;
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typedef struct AVInputFormat {
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const char *name;
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/**
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* Descriptive name for the format, meant to be more human-readable
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* than \p name. You \e should use the NULL_IF_CONFIG_SMALL() macro
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* to define it.
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*/
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const char *long_name;
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/** Size of private data so that it can be allocated in the wrapper. */
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int priv_data_size;
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/**
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* Tell if a given file has a chance of being parsed as this format.
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* The buffer provided is guaranteed to be AVPROBE_PADDING_SIZE bytes
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* big so you do not have to check for that unless you need more.
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*/
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int (*read_probe)(AVProbeData *);
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/** Read the format header and initialize the AVFormatContext
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structure. Return 0 if OK. 'ap' if non-NULL contains
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additional parameters. Only used in raw format right
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now. 'av_new_stream' should be called to create new streams. */
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int (*read_header)(struct AVFormatContext *,
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AVFormatParameters *ap);
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/** Read one packet and put it in 'pkt'. pts and flags are also
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set. 'av_new_stream' can be called only if the flag
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AVFMTCTX_NOHEADER is used. */
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int (*read_packet)(struct AVFormatContext *, AVPacket *pkt);
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/** Close the stream. The AVFormatContext and AVStreams are not
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freed by this function */
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int (*read_close)(struct AVFormatContext *);
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#if LIBAVFORMAT_VERSION_MAJOR < 53
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/**
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* Seek to a given timestamp relative to the frames in
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* stream component stream_index.
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* @param stream_index Must not be -1.
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* @param flags Selects which direction should be preferred if no exact
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* match is available.
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* @return >= 0 on success (but not necessarily the new offset)
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*/
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int (*read_seek)(struct AVFormatContext *,
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int stream_index, int64_t timestamp, int flags);
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#endif
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/**
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* Gets the next timestamp in stream[stream_index].time_base units.
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* @return the timestamp or AV_NOPTS_VALUE if an error occurred
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*/
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int64_t (*read_timestamp)(struct AVFormatContext *s, int stream_index,
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int64_t *pos, int64_t pos_limit);
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/** Can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER. */
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int flags;
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/** If extensions are defined, then no probe is done. You should
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usually not use extension format guessing because it is not
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reliable enough */
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const char *extensions;
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/** General purpose read-only value that the format can use. */
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int value;
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/** Start/resume playing - only meaningful if using a network-based format
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(RTSP). */
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int (*read_play)(struct AVFormatContext *);
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/** Pause playing - only meaningful if using a network-based format
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(RTSP). */
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int (*read_pause)(struct AVFormatContext *);
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const struct AVCodecTag * const *codec_tag;
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/**
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* Seek to timestamp ts.
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* Seeking will be done so that the point from which all active streams
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* can be presented successfully will be closest to ts and within min/max_ts.
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* Active streams are all streams that have AVStream.discard < AVDISCARD_ALL.
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*/
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int (*read_seek2)(struct AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags);
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/* private fields */
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struct AVInputFormat *next;
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} AVInputFormat;
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enum AVStreamParseType {
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AVSTREAM_PARSE_NONE,
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AVSTREAM_PARSE_FULL, /**< full parsing and repack */
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AVSTREAM_PARSE_HEADERS, /**< Only parse headers, do not repack. */
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AVSTREAM_PARSE_TIMESTAMPS, /**< full parsing and interpolation of timestamps for frames not starting on a packet boundary */
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};
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typedef struct AVIndexEntry {
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int64_t pos;
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int64_t timestamp;
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#define AVINDEX_KEYFRAME 0x0001
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int flags:2;
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int size:30; //Yeah, trying to keep the size of this small to reduce memory requirements (it is 24 vs. 32 bytes due to possible 8-byte alignment).
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int min_distance; /**< Minimum distance between this and the previous keyframe, used to avoid unneeded searching. */
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} AVIndexEntry;
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#define AV_DISPOSITION_DEFAULT 0x0001
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#define AV_DISPOSITION_DUB 0x0002
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#define AV_DISPOSITION_ORIGINAL 0x0004
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#define AV_DISPOSITION_COMMENT 0x0008
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#define AV_DISPOSITION_LYRICS 0x0010
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#define AV_DISPOSITION_KARAOKE 0x0020
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/**
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* Stream structure.
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* New fields can be added to the end with minor version bumps.
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* Removal, reordering and changes to existing fields require a major
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* version bump.
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* sizeof(AVStream) must not be used outside libav*.
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*/
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typedef struct AVStream {
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int index; /**< stream index in AVFormatContext */
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int id; /**< format-specific stream ID */
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AVCodecContext *codec; /**< codec context */
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/**
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* Real base framerate of the stream.
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* This is the lowest framerate with which all timestamps can be
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* represented accurately (it is the least common multiple of all
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* framerates in the stream). Note, this value is just a guess!
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* For example, if the time base is 1/90000 and all frames have either
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* approximately 3600 or 1800 timer ticks, then r_frame_rate will be 50/1.
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*/
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AVRational r_frame_rate;
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void *priv_data;
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/* internal data used in av_find_stream_info() */
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int64_t first_dts;
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/** encoding: pts generation when outputting stream */
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struct AVFrac pts;
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/**
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* This is the fundamental unit of time (in seconds) in terms
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* of which frame timestamps are represented. For fixed-fps content,
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* time base should be 1/framerate and timestamp increments should be 1.
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*/
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AVRational time_base;
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int pts_wrap_bits; /**< number of bits in pts (used for wrapping control) */
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/* ffmpeg.c private use */
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int stream_copy; /**< If set, just copy stream. */
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enum AVDiscard discard; ///< Selects which packets can be discarded at will and do not need to be demuxed.
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//FIXME move stuff to a flags field?
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/** Quality, as it has been removed from AVCodecContext and put in AVVideoFrame.
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* MN: dunno if that is the right place for it */
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float quality;
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/**
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* Decoding: pts of the first frame of the stream, in stream time base.
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* Only set this if you are absolutely 100% sure that the value you set
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* it to really is the pts of the first frame.
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* This may be undefined (AV_NOPTS_VALUE).
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* @note The ASF header does NOT contain a correct start_time the ASF
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* demuxer must NOT set this.
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*/
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int64_t start_time;
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/**
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* Decoding: duration of the stream, in stream time base.
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* If a source file does not specify a duration, but does specify
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* a bitrate, this value will be estimated from bitrate and file size.
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*/
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int64_t duration;
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char language[4]; /** ISO 639 3-letter language code (empty string if undefined) */
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/* av_read_frame() support */
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enum AVStreamParseType need_parsing;
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struct AVCodecParserContext *parser;
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int64_t cur_dts;
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int last_IP_duration;
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int64_t last_IP_pts;
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/* av_seek_frame() support */
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AVIndexEntry *index_entries; /**< Only used if the format does not
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support seeking natively. */
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int nb_index_entries;
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unsigned int index_entries_allocated_size;
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|
int64_t nb_frames; ///< number of frames in this stream if known or 0
|
|
|
|
#if LIBAVFORMAT_VERSION_INT < (53<<16)
|
|
int64_t unused[4+1];
|
|
#endif
|
|
|
|
char *filename; /**< source filename of the stream */
|
|
|
|
int disposition; /**< AV_DISPOSITION_* bit field */
|
|
|
|
AVProbeData probe_data;
|
|
#define MAX_REORDER_DELAY 16
|
|
int64_t pts_buffer[MAX_REORDER_DELAY+1];
|
|
|
|
/**
|
|
* sample aspect ratio (0 if unknown)
|
|
* - encoding: Set by user.
|
|
* - decoding: Set by libavformat.
|
|
*/
|
|
AVRational sample_aspect_ratio;
|
|
|
|
AVMetadata *metadata;
|
|
|
|
/* av_read_frame() support */
|
|
const uint8_t *cur_ptr;
|
|
int cur_len;
|
|
AVPacket cur_pkt;
|
|
|
|
// Timestamp generation support:
|
|
/**
|
|
* Timestamp corresponding to the last dts sync point.
|
|
*
|
|
* Initialized when AVCodecParserContext.dts_sync_point >= 0 and
|
|
* a DTS is received from the underlying container. Otherwise set to
|
|
* AV_NOPTS_VALUE by default.
|
|
*/
|
|
int64_t reference_dts;
|
|
} AVStream;
|
|
|
|
#define AV_PROGRAM_RUNNING 1
|
|
|
|
/**
|
|
* 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(AVProgram) must not be used outside libav*.
|
|
*/
|
|
typedef struct AVProgram {
|
|
int id;
|
|
char *provider_name; ///< network name for DVB streams
|
|
char *name; ///< service name for DVB streams
|
|
int flags;
|
|
enum AVDiscard discard; ///< selects which program to discard and which to feed to the caller
|
|
unsigned int *stream_index;
|
|
unsigned int nb_stream_indexes;
|
|
AVMetadata *metadata;
|
|
} AVProgram;
|
|
|
|
#define AVFMTCTX_NOHEADER 0x0001 /**< signal that no header is present
|
|
(streams are added dynamically) */
|
|
|
|
typedef struct AVChapter {
|
|
int id; ///< unique ID to identify the chapter
|
|
AVRational time_base; ///< time base in which the start/end timestamps are specified
|
|
int64_t start, end; ///< chapter start/end time in time_base units
|
|
char *title; ///< chapter title
|
|
AVMetadata *metadata;
|
|
} AVChapter;
|
|
|
|
#define MAX_STREAMS 20
|
|
|
|
/**
|
|
* Format I/O 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(AVFormatContext) must not be used outside libav*.
|
|
*/
|
|
typedef struct AVFormatContext {
|
|
const AVClass *av_class; /**< Set by avformat_alloc_context. */
|
|
/* Can only be iformat or oformat, not both at the same time. */
|
|
struct AVInputFormat *iformat;
|
|
struct AVOutputFormat *oformat;
|
|
void *priv_data;
|
|
ByteIOContext *pb;
|
|
unsigned int nb_streams;
|
|
AVStream *streams[MAX_STREAMS];
|
|
char filename[1024]; /**< input or output filename */
|
|
/* stream info */
|
|
int64_t timestamp;
|
|
char title[512];
|
|
char author[512];
|
|
char copyright[512];
|
|
char comment[512];
|
|
char album[512];
|
|
int year; /**< ID3 year, 0 if none */
|
|
int track; /**< track number, 0 if none */
|
|
char genre[32]; /**< ID3 genre */
|
|
|
|
int ctx_flags; /**< Format-specific flags, see AVFMTCTX_xx */
|
|
/* private data for pts handling (do not modify directly). */
|
|
/** This buffer is only needed when packets were already buffered but
|
|
not decoded, for example to get the codec parameters in MPEG
|
|
streams. */
|
|
struct AVPacketList *packet_buffer;
|
|
|
|
/** Decoding: position of the first frame of the component, in
|
|
AV_TIME_BASE fractional seconds. NEVER set this value directly:
|
|
It is deduced from the AVStream values. */
|
|
int64_t start_time;
|
|
/** Decoding: duration of the stream, in AV_TIME_BASE fractional
|
|
seconds. NEVER set this value directly: it is deduced from the
|
|
AVStream values. */
|
|
int64_t duration;
|
|
/** decoding: total file size, 0 if unknown */
|
|
int64_t file_size;
|
|
/** Decoding: total stream bitrate in bit/s, 0 if not
|
|
available. Never set it directly if the file_size and the
|
|
duration are known as FFmpeg can compute it automatically. */
|
|
int bit_rate;
|
|
|
|
/* av_read_frame() support */
|
|
AVStream *cur_st;
|
|
#if LIBAVFORMAT_VERSION_INT < (53<<16)
|
|
const uint8_t *cur_ptr_deprecated;
|
|
int cur_len_deprecated;
|
|
AVPacket cur_pkt_deprecated;
|
|
#endif
|
|
|
|
/* av_seek_frame() support */
|
|
int64_t data_offset; /** offset of the first packet */
|
|
int index_built;
|
|
|
|
int mux_rate;
|
|
int packet_size;
|
|
int preload;
|
|
int max_delay;
|
|
|
|
#define AVFMT_NOOUTPUTLOOP -1
|
|
#define AVFMT_INFINITEOUTPUTLOOP 0
|
|
/** number of times to loop output in formats that support it */
|
|
int loop_output;
|
|
|
|
int flags;
|
|
#define AVFMT_FLAG_GENPTS 0x0001 ///< Generate missing pts even if it requires parsing future frames.
|
|
#define AVFMT_FLAG_IGNIDX 0x0002 ///< Ignore index.
|
|
#define AVFMT_FLAG_NONBLOCK 0x0004 ///< Do not block when reading packets from input.
|
|
|
|
int loop_input;
|
|
/** decoding: size of data to probe; encoding: unused. */
|
|
unsigned int probesize;
|
|
|
|
/**
|
|
* Maximum time (in AV_TIME_BASE units) during which the input should
|
|
* be analyzed in av_find_stream_info().
|
|
*/
|
|
int max_analyze_duration;
|
|
|
|
const uint8_t *key;
|
|
int keylen;
|
|
|
|
unsigned int nb_programs;
|
|
AVProgram **programs;
|
|
|
|
/**
|
|
* Forced video codec_id.
|
|
* Demuxing: Set by user.
|
|
*/
|
|
enum CodecID video_codec_id;
|
|
/**
|
|
* Forced audio codec_id.
|
|
* Demuxing: Set by user.
|
|
*/
|
|
enum CodecID audio_codec_id;
|
|
/**
|
|
* Forced subtitle codec_id.
|
|
* Demuxing: Set by user.
|
|
*/
|
|
enum CodecID subtitle_codec_id;
|
|
|
|
/**
|
|
* Maximum amount of memory in bytes to use for the index of each stream.
|
|
* If the index exceeds this size, entries will be discarded as
|
|
* needed to maintain a smaller size. This can lead to slower or less
|
|
* accurate seeking (depends on demuxer).
|
|
* Demuxers for which a full in-memory index is mandatory will ignore
|
|
* this.
|
|
* muxing : unused
|
|
* demuxing: set by user
|
|
*/
|
|
unsigned int max_index_size;
|
|
|
|
/**
|
|
* Maximum amount of memory in bytes to use for buffering frames
|
|
* obtained from realtime capture devices.
|
|
*/
|
|
unsigned int max_picture_buffer;
|
|
|
|
unsigned int nb_chapters;
|
|
AVChapter **chapters;
|
|
|
|
/**
|
|
* Flags to enable debugging.
|
|
*/
|
|
int debug;
|
|
#define FF_FDEBUG_TS 0x0001
|
|
|
|
/**
|
|
* Raw packets from the demuxer, prior to parsing and decoding.
|
|
* This buffer is used for buffering packets until the codec can
|
|
* be identified, as parsing cannot be done without knowing the
|
|
* codec.
|
|
*/
|
|
struct AVPacketList *raw_packet_buffer;
|
|
struct AVPacketList *raw_packet_buffer_end;
|
|
|
|
struct AVPacketList *packet_buffer_end;
|
|
|
|
AVMetadata *metadata;
|
|
} AVFormatContext;
|
|
|
|
typedef struct AVPacketList {
|
|
AVPacket pkt;
|
|
struct AVPacketList *next;
|
|
} AVPacketList;
|
|
|
|
#if LIBAVFORMAT_VERSION_INT < (53<<16)
|
|
extern AVInputFormat *first_iformat;
|
|
extern AVOutputFormat *first_oformat;
|
|
#endif
|
|
|
|
/**
|
|
* If f is NULL, returns the first registered input format,
|
|
* if f is non-NULL, returns the next registered input format after f
|
|
* or NULL if f is the last one.
|
|
*/
|
|
AVInputFormat *av_iformat_next(AVInputFormat *f);
|
|
|
|
/**
|
|
* If f is NULL, returns the first registered output format,
|
|
* if f is non-NULL, returns the next registered output format after f
|
|
* or NULL if f is the last one.
|
|
*/
|
|
AVOutputFormat *av_oformat_next(AVOutputFormat *f);
|
|
|
|
enum CodecID av_guess_image2_codec(const char *filename);
|
|
|
|
/* XXX: Use automatic init with either ELF sections or C file parser */
|
|
/* modules. */
|
|
|
|
/* utils.c */
|
|
void av_register_input_format(AVInputFormat *format);
|
|
void av_register_output_format(AVOutputFormat *format);
|
|
AVOutputFormat *guess_stream_format(const char *short_name,
|
|
const char *filename,
|
|
const char *mime_type);
|
|
AVOutputFormat *guess_format(const char *short_name,
|
|
const char *filename,
|
|
const char *mime_type);
|
|
|
|
/**
|
|
* Guesses the codec ID based upon muxer and filename.
|
|
*/
|
|
enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
|
|
const char *filename, const char *mime_type,
|
|
enum CodecType type);
|
|
|
|
/**
|
|
* Send a nice hexadecimal dump of a buffer to the specified file stream.
|
|
*
|
|
* @param f The file stream pointer where the dump should be sent to.
|
|
* @param buf buffer
|
|
* @param size buffer size
|
|
*
|
|
* @see av_hex_dump_log, av_pkt_dump, av_pkt_dump_log
|
|
*/
|
|
void av_hex_dump(FILE *f, uint8_t *buf, int size);
|
|
|
|
/**
|
|
* Send a nice hexadecimal dump of a buffer to the log.
|
|
*
|
|
* @param avcl A pointer to an arbitrary struct of which the first field is a
|
|
* pointer to an AVClass struct.
|
|
* @param level The importance level of the message, lower values signifying
|
|
* higher importance.
|
|
* @param buf buffer
|
|
* @param size buffer size
|
|
*
|
|
* @see av_hex_dump, av_pkt_dump, av_pkt_dump_log
|
|
*/
|
|
void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size);
|
|
|
|
/**
|
|
* Send a nice dump of a packet to the specified file stream.
|
|
*
|
|
* @param f The file stream pointer where the dump should be sent to.
|
|
* @param pkt packet to dump
|
|
* @param dump_payload True if the payload must be displayed, too.
|
|
*/
|
|
void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
|
|
|
|
/**
|
|
* Send a nice dump of a packet to the log.
|
|
*
|
|
* @param avcl A pointer to an arbitrary struct of which the first field is a
|
|
* pointer to an AVClass struct.
|
|
* @param level The importance level of the message, lower values signifying
|
|
* higher importance.
|
|
* @param pkt packet to dump
|
|
* @param dump_payload True if the payload must be displayed, too.
|
|
*/
|
|
void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload);
|
|
|
|
/**
|
|
* Initialize libavformat and register all the muxers, demuxers and
|
|
* protocols. If you do not call this function, then you can select
|
|
* exactly which formats you want to support.
|
|
*
|
|
* @see av_register_input_format()
|
|
* @see av_register_output_format()
|
|
* @see av_register_protocol()
|
|
*/
|
|
void av_register_all(void);
|
|
|
|
/** codec tag <-> codec id */
|
|
enum CodecID av_codec_get_id(const struct AVCodecTag * const *tags, unsigned int tag);
|
|
unsigned int av_codec_get_tag(const struct AVCodecTag * const *tags, enum CodecID id);
|
|
|
|
/* media file input */
|
|
|
|
/**
|
|
* Finds AVInputFormat based on the short name of the input format.
|
|
*/
|
|
AVInputFormat *av_find_input_format(const char *short_name);
|
|
|
|
/**
|
|
* Guess file format.
|
|
*
|
|
* @param is_opened Whether the file is already opened; determines whether
|
|
* demuxers with or without AVFMT_NOFILE are probed.
|
|
*/
|
|
AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
|
|
|
|
/**
|
|
* Allocates all the structures needed to read an input stream.
|
|
* This does not open the needed codecs for decoding the stream[s].
|
|
*/
|
|
int av_open_input_stream(AVFormatContext **ic_ptr,
|
|
ByteIOContext *pb, const char *filename,
|
|
AVInputFormat *fmt, AVFormatParameters *ap);
|
|
|
|
/**
|
|
* Open a media file as input. The codecs are not opened. Only the file
|
|
* header (if present) is read.
|
|
*
|
|
* @param ic_ptr The opened media file handle is put here.
|
|
* @param filename filename to open
|
|
* @param fmt If non-NULL, force the file format to use.
|
|
* @param buf_size optional buffer size (zero if default is OK)
|
|
* @param ap Additional parameters needed when opening the file
|
|
* (NULL if default).
|
|
* @return 0 if OK, AVERROR_xxx otherwise
|
|
*/
|
|
int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
|
|
AVInputFormat *fmt,
|
|
int buf_size,
|
|
AVFormatParameters *ap);
|
|
|
|
#if LIBAVFORMAT_VERSION_MAJOR < 53
|
|
/**
|
|
* @deprecated Use avformat_alloc_context() instead.
|
|
*/
|
|
attribute_deprecated AVFormatContext *av_alloc_format_context(void);
|
|
#endif
|
|
|
|
/**
|
|
* Allocate an AVFormatContext.
|
|
* Can be freed with av_free() but do not forget to free everything you
|
|
* explicitly allocated as well!
|
|
*/
|
|
AVFormatContext *avformat_alloc_context(void);
|
|
|
|
/**
|
|
* Read packets of a media file to get stream information. This
|
|
* is useful for file formats with no headers such as MPEG. This
|
|
* function also computes the real framerate in case of MPEG-2 repeat
|
|
* frame mode.
|
|
* The logical file position is not changed by this function;
|
|
* examined packets may be buffered for later processing.
|
|
*
|
|
* @param ic media file handle
|
|
* @return >=0 if OK, AVERROR_xxx on error
|
|
* @todo Let the user decide somehow what information is needed so that
|
|
* we do not waste time getting stuff the user does not need.
|
|
*/
|
|
int av_find_stream_info(AVFormatContext *ic);
|
|
|
|
/**
|
|
* Read a transport packet from a media file.
|
|
*
|
|
* This function is obsolete and should never be used.
|
|
* Use av_read_frame() instead.
|
|
*
|
|
* @param s media file handle
|
|
* @param pkt is filled
|
|
* @return 0 if OK, AVERROR_xxx on error
|
|
*/
|
|
int av_read_packet(AVFormatContext *s, AVPacket *pkt);
|
|
|
|
/**
|
|
* Return the next frame of a stream.
|
|
*
|
|
* The returned packet is valid
|
|
* until the next av_read_frame() or until av_close_input_file() and
|
|
* must be freed with av_free_packet. For video, the packet contains
|
|
* exactly one frame. For audio, it contains an integer number of
|
|
* frames if each frame has a known fixed size (e.g. PCM or ADPCM
|
|
* data). If the audio frames have a variable size (e.g. MPEG audio),
|
|
* then it contains one frame.
|
|
*
|
|
* pkt->pts, pkt->dts and pkt->duration are always set to correct
|
|
* values in AVStream.time_base units (and guessed if the format cannot
|
|
* provide them). pkt->pts can be AV_NOPTS_VALUE if the video format
|
|
* has B-frames, so it is better to rely on pkt->dts if you do not
|
|
* decompress the payload.
|
|
*
|
|
* @return 0 if OK, < 0 on error or end of file
|
|
*/
|
|
int av_read_frame(AVFormatContext *s, AVPacket *pkt);
|
|
|
|
/**
|
|
* Seek to the keyframe at timestamp.
|
|
* 'timestamp' in 'stream_index'.
|
|
* @param stream_index If stream_index is (-1), a default
|
|
* stream is selected, and timestamp is automatically converted
|
|
* from AV_TIME_BASE units to the stream specific time_base.
|
|
* @param timestamp Timestamp in AVStream.time_base units
|
|
* or, if no stream is specified, in AV_TIME_BASE units.
|
|
* @param flags flags which select direction and seeking mode
|
|
* @return >= 0 on success
|
|
*/
|
|
int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp,
|
|
int flags);
|
|
|
|
/**
|
|
* Seek to timestamp ts.
|
|
* Seeking will be done so that the point from which all active streams
|
|
* can be presented successfully will be closest to ts and within min/max_ts.
|
|
* Active streams are all streams that have AVStream.discard < AVDISCARD_ALL.
|
|
*
|
|
* If flags contain AVSEEK_FLAG_BYTE, then all timestamps are in bytes and
|
|
* are the file position (this may not be supported by all demuxers).
|
|
* If flags contain AVSEEK_FLAG_FRAME, then all timestamps are in frames
|
|
* in the stream with stream_index (this may not be supported by all demuxers).
|
|
* Otherwise all timestamps are in units of the stream selected by stream_index
|
|
* or if stream_index is -1, in AV_TIME_BASE units.
|
|
* If flags contain AVSEEK_FLAG_ANY, then non-keyframes are treated as
|
|
* keyframes (this may not be supported by all demuxers).
|
|
*
|
|
* @param stream_index index of the stream which is used as time base reference
|
|
* @param min_ts smallest acceptable timestamp
|
|
* @param ts target timestamp
|
|
* @param max_ts largest acceptable timestamp
|
|
* @param flags flags
|
|
* @returns >=0 on success, error code otherwise
|
|
*
|
|
* @NOTE This is part of the new seek API which is still under construction.
|
|
* Thus do not use this yet. It may change at any time, do not expect
|
|
* ABI compatibility yet!
|
|
*/
|
|
int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags);
|
|
|
|
/**
|
|
* Start playing a network-based stream (e.g. RTSP stream) at the
|
|
* current position.
|
|
*/
|
|
int av_read_play(AVFormatContext *s);
|
|
|
|
/**
|
|
* Pause a network-based stream (e.g. RTSP stream).
|
|
*
|
|
* Use av_read_play() to resume it.
|
|
*/
|
|
int av_read_pause(AVFormatContext *s);
|
|
|
|
/**
|
|
* Free a AVFormatContext allocated by av_open_input_stream.
|
|
* @param s context to free
|
|
*/
|
|
void av_close_input_stream(AVFormatContext *s);
|
|
|
|
/**
|
|
* Close a media file (but not its codecs).
|
|
*
|
|
* @param s media file handle
|
|
*/
|
|
void av_close_input_file(AVFormatContext *s);
|
|
|
|
/**
|
|
* Add a new stream to a media file.
|
|
*
|
|
* Can only be called in the read_header() function. If the flag
|
|
* AVFMTCTX_NOHEADER is in the format context, then new streams
|
|
* can be added in read_packet too.
|
|
*
|
|
* @param s media file handle
|
|
* @param id file-format-dependent stream ID
|
|
*/
|
|
AVStream *av_new_stream(AVFormatContext *s, int id);
|
|
AVProgram *av_new_program(AVFormatContext *s, int id);
|
|
|
|
/**
|
|
* Add a new chapter.
|
|
* This function is NOT part of the public API
|
|
* and should ONLY be used by demuxers.
|
|
*
|
|
* @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 *ff_new_chapter(AVFormatContext *s, int id, AVRational time_base,
|
|
int64_t start, int64_t end, const char *title);
|
|
|
|
/**
|
|
* Set the pts for a given stream.
|
|
*
|
|
* @param s stream
|
|
* @param pts_wrap_bits number of bits effectively used by the pts
|
|
* (used for wrap control, 33 is the value for MPEG)
|
|
* @param pts_num numerator to convert to seconds (MPEG: 1)
|
|
* @param pts_den denominator to convert to seconds (MPEG: 90000)
|
|
*/
|
|
void av_set_pts_info(AVStream *s, int pts_wrap_bits,
|
|
int pts_num, int pts_den);
|
|
|
|
#define AVSEEK_FLAG_BACKWARD 1 ///< seek backward
|
|
#define AVSEEK_FLAG_BYTE 2 ///< seeking based on position in bytes
|
|
#define AVSEEK_FLAG_ANY 4 ///< seek to any frame, even non-keyframes
|
|
|
|
int av_find_default_stream_index(AVFormatContext *s);
|
|
|
|
/**
|
|
* Gets the index for a specific timestamp.
|
|
* @param flags if AVSEEK_FLAG_BACKWARD then the returned index will correspond
|
|
* to the timestamp which is <= the requested one, if backward
|
|
* is 0, then it will be >=
|
|
* if AVSEEK_FLAG_ANY seek to any frame, only keyframes otherwise
|
|
* @return < 0 if no such timestamp could be found
|
|
*/
|
|
int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags);
|
|
|
|
/**
|
|
* Ensures the index uses less memory than the maximum specified in
|
|
* AVFormatContext.max_index_size by discarding entries if it grows
|
|
* too large.
|
|
* This function is not part of the public API and should only be called
|
|
* by demuxers.
|
|
*/
|
|
void ff_reduce_index(AVFormatContext *s, int stream_index);
|
|
|
|
/**
|
|
* Add an index entry into a sorted list. Update the entry if the list
|
|
* already contains it.
|
|
*
|
|
* @param timestamp timestamp in the time base of the given stream
|
|
*/
|
|
int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp,
|
|
int size, int distance, int flags);
|
|
|
|
/**
|
|
* Does a binary search using av_index_search_timestamp() and
|
|
* AVCodec.read_timestamp().
|
|
* This is not supposed to be called directly by a user application,
|
|
* but by demuxers.
|
|
* @param target_ts target timestamp in the time base of the given stream
|
|
* @param stream_index stream number
|
|
*/
|
|
int av_seek_frame_binary(AVFormatContext *s, int stream_index,
|
|
int64_t target_ts, int flags);
|
|
|
|
/**
|
|
* Updates 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 av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp);
|
|
|
|
/**
|
|
* Does a binary search using read_timestamp().
|
|
* This is not supposed to be called directly by a user application,
|
|
* but by demuxers.
|
|
* @param target_ts target timestamp in the time base of the given stream
|
|
* @param stream_index stream number
|
|
*/
|
|
int64_t av_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 ));
|
|
|
|
/** media file output */
|
|
int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
|
|
|
|
/**
|
|
* Allocate the stream private data and write the stream header to an
|
|
* output media file.
|
|
*
|
|
* @param s media file handle
|
|
* @return 0 if OK, AVERROR_xxx on error
|
|
*/
|
|
int av_write_header(AVFormatContext *s);
|
|
|
|
/**
|
|
* Write a packet to an output media file.
|
|
*
|
|
* The packet shall contain one audio or video frame.
|
|
* The packet must be correctly interleaved according to the container
|
|
* specification, if not then av_interleaved_write_frame must be used.
|
|
*
|
|
* @param s media file handle
|
|
* @param pkt The packet, which contains the stream_index, buf/buf_size,
|
|
dts/pts, ...
|
|
* @return < 0 on error, = 0 if OK, 1 if end of stream wanted
|
|
*/
|
|
int av_write_frame(AVFormatContext *s, AVPacket *pkt);
|
|
|
|
/**
|
|
* Writes a packet to an output media file ensuring correct interleaving.
|
|
*
|
|
* The packet must contain one audio or video frame.
|
|
* If the packets are already correctly interleaved, the application should
|
|
* call av_write_frame() instead as it is slightly faster. It is also important
|
|
* to keep in mind that completely non-interleaved input will need huge amounts
|
|
* of memory to interleave with this, so it is preferable to interleave at the
|
|
* demuxer level.
|
|
*
|
|
* @param s media file handle
|
|
* @param pkt The packet, which contains the stream_index, buf/buf_size,
|
|
dts/pts, ...
|
|
* @return < 0 on error, = 0 if OK, 1 if end of stream wanted
|
|
*/
|
|
int av_interleaved_write_frame(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 in 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 av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
|
|
AVPacket *pkt, int flush);
|
|
|
|
/**
|
|
* @brief Write the stream trailer to an output media file and
|
|
* free the file private data.
|
|
*
|
|
* May only be called after a successful call to av_write_header.
|
|
*
|
|
* @param s media file handle
|
|
* @return 0 if OK, AVERROR_xxx on error
|
|
*/
|
|
int av_write_trailer(AVFormatContext *s);
|
|
|
|
void dump_format(AVFormatContext *ic,
|
|
int index,
|
|
const char *url,
|
|
int is_output);
|
|
|
|
#if LIBAVFORMAT_VERSION_MAJOR < 53
|
|
/**
|
|
* Parses width and height out of string str.
|
|
* @deprecated Use av_parse_video_frame_size instead.
|
|
*/
|
|
attribute_deprecated int parse_image_size(int *width_ptr, int *height_ptr,
|
|
const char *str);
|
|
|
|
/**
|
|
* Converts framerate from a string to a fraction.
|
|
* @deprecated Use av_parse_video_frame_rate instead.
|
|
*/
|
|
attribute_deprecated int parse_frame_rate(int *frame_rate, int *frame_rate_base,
|
|
const char *arg);
|
|
#endif
|
|
|
|
/**
|
|
* Parses \p datestr and returns a corresponding number of microseconds.
|
|
* @param datestr String representing a date or a duration.
|
|
* - If a date the syntax is:
|
|
* @code
|
|
* [{YYYY-MM-DD|YYYYMMDD}]{T| }{HH[:MM[:SS[.m...]]][Z]|HH[MM[SS[.m...]]][Z]}
|
|
* @endcode
|
|
* Time is local time unless Z is appended, in which case it is
|
|
* interpreted as UTC.
|
|
* If the year-month-day part is not specified it takes the current
|
|
* year-month-day.
|
|
* Returns the number of microseconds since 1st of January, 1970 up to
|
|
* the time of the parsed date or INT64_MIN if \p datestr cannot be
|
|
* successfully parsed.
|
|
* - If a duration the syntax is:
|
|
* @code
|
|
* [-]HH[:MM[:SS[.m...]]]
|
|
* [-]S+[.m...]
|
|
* @endcode
|
|
* Returns the number of microseconds contained in a time interval
|
|
* with the specified duration or INT64_MIN if \p datestr cannot be
|
|
* successfully parsed.
|
|
* @param duration Flag which tells how to interpret \p datestr, if
|
|
* not zero \p datestr is interpreted as a duration, otherwise as a
|
|
* date.
|
|
*/
|
|
int64_t parse_date(const char *datestr, int duration);
|
|
|
|
/** Gets the current time in microseconds. */
|
|
int64_t av_gettime(void);
|
|
|
|
/* ffm-specific for ffserver */
|
|
#define FFM_PACKET_SIZE 4096
|
|
int64_t ffm_read_write_index(int fd);
|
|
int ffm_write_write_index(int fd, int64_t pos);
|
|
void ffm_set_write_index(AVFormatContext *s, int64_t pos, int64_t file_size);
|
|
|
|
/**
|
|
* Attempts to find a specific tag in a URL.
|
|
*
|
|
* syntax: '?tag1=val1&tag2=val2...'. Little URL decoding is done.
|
|
* Return 1 if found.
|
|
*/
|
|
int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
|
|
|
|
/**
|
|
* Returns in 'buf' the path with '%d' replaced by a number.
|
|
*
|
|
* Also handles the '%0nd' format where 'n' is the total number
|
|
* of digits and '%%'.
|
|
*
|
|
* @param buf destination buffer
|
|
* @param buf_size destination buffer size
|
|
* @param path numbered sequence string
|
|
* @param number frame number
|
|
* @return 0 if OK, -1 on format error
|
|
*/
|
|
int av_get_frame_filename(char *buf, int buf_size,
|
|
const char *path, int number);
|
|
|
|
/**
|
|
* Check whether filename actually is a numbered sequence generator.
|
|
*
|
|
* @param filename possible numbered sequence string
|
|
* @return 1 if a valid numbered sequence string, 0 otherwise
|
|
*/
|
|
int av_filename_number_test(const char *filename);
|
|
|
|
/**
|
|
* Generate an SDP for an RTP session.
|
|
*
|
|
* @param ac array of AVFormatContexts describing the RTP streams. If the
|
|
* array is composed by only one context, such context can contain
|
|
* multiple AVStreams (one AVStream per RTP stream). Otherwise,
|
|
* all the contexts in the array (an AVCodecContext per RTP stream)
|
|
* must contain only one AVStream.
|
|
* @param n_files number of AVCodecContexts contained in ac
|
|
* @param buff buffer where the SDP will be stored (must be allocated by
|
|
* the caller)
|
|
* @param size the size of the buffer
|
|
* @return 0 if OK, AVERROR_xxx on error
|
|
*/
|
|
int avf_sdp_create(AVFormatContext *ac[], int n_files, char *buff, int size);
|
|
|
|
#ifdef HAVE_AV_CONFIG_H
|
|
|
|
void ff_dynarray_add(intptr_t **tab_ptr, int *nb_ptr, intptr_t elem);
|
|
|
|
#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 */\
|
|
ff_dynarray_add((intptr_t **)_tab, nb_ptr, (intptr_t)_elem);\
|
|
} while(0)
|
|
#else
|
|
#define dynarray_add(tab, nb_ptr, elem)\
|
|
do {\
|
|
ff_dynarray_add((intptr_t **)(tab), nb_ptr, (intptr_t)(elem));\
|
|
} while(0)
|
|
#endif
|
|
|
|
time_t mktimegm(struct tm *tm);
|
|
struct tm *brktimegm(time_t secs, struct tm *tm);
|
|
const char *small_strptime(const char *p, const char *fmt,
|
|
struct tm *dt);
|
|
|
|
struct in_addr;
|
|
int resolve_host(struct in_addr *sin_addr, const char *hostname);
|
|
|
|
void url_split(char *proto, int proto_size,
|
|
char *authorization, int authorization_size,
|
|
char *hostname, int hostname_size,
|
|
int *port_ptr,
|
|
char *path, int path_size,
|
|
const char *url);
|
|
|
|
int match_ext(const char *filename, const char *extensions);
|
|
|
|
#endif /* HAVE_AV_CONFIG_H */
|
|
|
|
#endif /* AVFORMAT_AVFORMAT_H */
|