mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-12 18:25:03 +00:00
6af21de373
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
987 lines
30 KiB
C
987 lines
30 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_INTERNAL_H
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#define AVFORMAT_INTERNAL_H
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#include <stdint.h>
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#include "libavcodec/avcodec.h"
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#include "libavcodec/bsf.h"
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#include "avformat.h"
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#include "os_support.h"
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#define MAX_URL_SIZE 4096
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/** size of probe buffer, for guessing file type from file contents */
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#define PROBE_BUF_MIN 2048
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#define PROBE_BUF_MAX (1 << 20)
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#ifdef DEBUG
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# define hex_dump_debug(class, buf, size) av_hex_dump_log(class, AV_LOG_DEBUG, buf, size)
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#else
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# define hex_dump_debug(class, buf, size) do { if (0) av_hex_dump_log(class, AV_LOG_DEBUG, buf, size); } while(0)
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#endif
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/**
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* For an AVInputFormat with this flag set read_close() needs to be called
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* by the caller upon read_header() failure.
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*/
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#define FF_FMT_INIT_CLEANUP (1 << 0)
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typedef struct AVCodecTag {
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enum AVCodecID id;
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unsigned int tag;
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} AVCodecTag;
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typedef struct CodecMime{
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char str[32];
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enum AVCodecID id;
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} CodecMime;
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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 FFFrac {
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int64_t val, num, den;
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} FFFrac;
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typedef struct FFFormatContext {
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/**
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* The public context.
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*/
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AVFormatContext pub;
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/**
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* Number of streams relevant for interleaving.
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* Muxing only.
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*/
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int nb_interleaved_streams;
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/**
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* This buffer is only needed when packets were already buffered but
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* not decoded, for example to get the codec parameters in MPEG
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* streams.
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*/
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struct PacketList *packet_buffer;
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struct PacketList *packet_buffer_end;
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/* av_seek_frame() support */
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int64_t data_offset; /**< offset of the first packet */
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/**
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* Raw packets from the demuxer, prior to parsing and decoding.
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* This buffer is used for buffering packets until the codec can
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* be identified, as parsing cannot be done without knowing the
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* codec.
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*/
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struct PacketList *raw_packet_buffer;
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struct PacketList *raw_packet_buffer_end;
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/**
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* Packets split by the parser get queued here.
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*/
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struct PacketList *parse_queue;
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struct PacketList *parse_queue_end;
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/**
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* The generic code uses this as a temporary packet
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* to parse packets; it may also be used for other means
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* for short periods that are guaranteed not to overlap
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* with calls to av_read_frame() (or ff_read_packet())
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* or with each other.
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* It may be used by demuxers as a replacement for
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* stack packets (unless they call one of the aforementioned
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* functions with their own AVFormatContext).
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* Every user has to ensure that this packet is blank
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* after using it.
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*/
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AVPacket *parse_pkt;
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/**
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* Used to hold temporary packets.
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*/
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AVPacket *pkt;
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/**
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* Remaining size available for raw_packet_buffer, in bytes.
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*/
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#define RAW_PACKET_BUFFER_SIZE 2500000
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int raw_packet_buffer_remaining_size;
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/**
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* Offset to remap timestamps to be non-negative.
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* Expressed in timebase units.
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* @see AVStream.mux_ts_offset
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*/
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int64_t offset;
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/**
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* Timebase for the timestamp offset.
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*/
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AVRational offset_timebase;
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#if FF_API_COMPUTE_PKT_FIELDS2
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int missing_ts_warning;
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#endif
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int inject_global_side_data;
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int avoid_negative_ts_use_pts;
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/**
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* Timestamp of the end of the shortest stream.
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*/
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int64_t shortest_end;
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/**
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* Whether or not avformat_init_output has already been called
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*/
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int initialized;
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/**
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* Whether or not avformat_init_output fully initialized streams
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*/
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int streams_initialized;
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/**
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* ID3v2 tag useful for MP3 demuxing
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*/
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AVDictionary *id3v2_meta;
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/*
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* Prefer the codec framerate for avg_frame_rate computation.
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*/
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int prefer_codec_framerate;
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/**
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* Set if chapter ids are strictly monotonic.
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*/
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int chapter_ids_monotonic;
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} FFFormatContext;
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static av_always_inline FFFormatContext *ffformatcontext(AVFormatContext *s)
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{
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return (FFFormatContext*)s;
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}
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typedef struct FFStream {
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/**
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* The public context.
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*/
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AVStream pub;
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/**
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* Set to 1 if the codec allows reordering, so pts can be different
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* from dts.
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*/
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int reorder;
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/**
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* bitstream filter to run on stream
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* - encoding: Set by muxer using ff_stream_add_bitstream_filter
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* - decoding: unused
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*/
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AVBSFContext *bsfc;
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/**
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* Whether or not check_bitstream should still be run on each packet
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*/
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int bitstream_checked;
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/**
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* The codec context used by avformat_find_stream_info, the parser, etc.
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*/
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AVCodecContext *avctx;
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/**
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* 1 if avctx has been initialized with the values from the codec parameters
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*/
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int avctx_inited;
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/* the context for extracting extradata in find_stream_info()
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* inited=1/bsf=NULL signals that extracting is not possible (codec not
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* supported) */
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struct {
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AVBSFContext *bsf;
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int inited;
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} extract_extradata;
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/**
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* Whether the internal avctx needs to be updated from codecpar (after a late change to codecpar)
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*/
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int need_context_update;
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int is_intra_only;
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FFFrac *priv_pts;
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#define MAX_STD_TIMEBASES (30*12+30+3+6)
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/**
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* Stream information used internally by avformat_find_stream_info()
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*/
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struct {
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int64_t last_dts;
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int64_t duration_gcd;
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int duration_count;
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int64_t rfps_duration_sum;
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double (*duration_error)[2][MAX_STD_TIMEBASES];
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int64_t codec_info_duration;
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int64_t codec_info_duration_fields;
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int frame_delay_evidence;
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/**
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* 0 -> decoder has not been searched for yet.
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* >0 -> decoder found
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* <0 -> decoder with codec_id == -found_decoder has not been found
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*/
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int found_decoder;
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int64_t last_duration;
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/**
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* Those are used for average framerate estimation.
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*/
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int64_t fps_first_dts;
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int fps_first_dts_idx;
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int64_t fps_last_dts;
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int fps_last_dts_idx;
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} *info;
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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 interleaver_chunk_size;
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int64_t interleaver_chunk_duration;
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/**
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* stream probing state
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* -1 -> probing finished
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* 0 -> no probing requested
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* rest -> perform probing with request_probe being the minimum score to accept.
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*/
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int request_probe;
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/**
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* Indicates that everything up to the next keyframe
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* should be discarded.
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*/
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int skip_to_keyframe;
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/**
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* Number of samples to skip at the start of the frame decoded from the next packet.
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*/
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int skip_samples;
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/**
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* If not 0, the number of samples that should be skipped from the start of
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* the stream (the samples are removed from packets with pts==0, which also
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* assumes negative timestamps do not happen).
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* Intended for use with formats such as mp3 with ad-hoc gapless audio
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* support.
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*/
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int64_t start_skip_samples;
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/**
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* If not 0, the first audio sample that should be discarded from the stream.
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* This is broken by design (needs global sample count), but can't be
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* avoided for broken by design formats such as mp3 with ad-hoc gapless
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* audio support.
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*/
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int64_t first_discard_sample;
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/**
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* The sample after last sample that is intended to be discarded after
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* first_discard_sample. Works on frame boundaries only. Used to prevent
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* early EOF if the gapless info is broken (considered concatenated mp3s).
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*/
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int64_t last_discard_sample;
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/**
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* Number of internally decoded frames, used internally in libavformat, do not access
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* its lifetime differs from info which is why it is not in that structure.
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*/
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int nb_decoded_frames;
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/**
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* Timestamp offset added to timestamps before muxing
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*/
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int64_t mux_ts_offset;
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/**
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* Internal data to check for wrapping of the time stamp
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*/
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int64_t pts_wrap_reference;
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/**
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* Options for behavior, when a wrap is detected.
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*
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* Defined by AV_PTS_WRAP_ values.
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*
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* If correction is enabled, there are two possibilities:
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* If the first time stamp is near the wrap point, the wrap offset
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* will be subtracted, which will create negative time stamps.
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* Otherwise the offset will be added.
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*/
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int pts_wrap_behavior;
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/**
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* Internal data to prevent doing update_initial_durations() twice
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*/
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int update_initial_durations_done;
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#define MAX_REORDER_DELAY 16
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/**
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* Internal data to generate dts from pts
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*/
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int64_t pts_reorder_error[MAX_REORDER_DELAY+1];
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uint8_t pts_reorder_error_count[MAX_REORDER_DELAY+1];
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int64_t pts_buffer[MAX_REORDER_DELAY+1];
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/**
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* Internal data to analyze DTS and detect faulty mpeg streams
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*/
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int64_t last_dts_for_order_check;
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uint8_t dts_ordered;
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uint8_t dts_misordered;
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/**
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* Internal data to inject global side data
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*/
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int inject_global_side_data;
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/**
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* display aspect ratio (0 if unknown)
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* - encoding: unused
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* - decoding: Set by libavformat to calculate sample_aspect_ratio internally
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*/
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AVRational display_aspect_ratio;
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AVProbeData probe_data;
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/**
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* last packet in packet_buffer for this stream when muxing.
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*/
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struct PacketList *last_in_packet_buffer;
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int64_t last_IP_pts;
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int last_IP_duration;
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/**
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* Number of packets to buffer for codec probing
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*/
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int probe_packets;
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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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/**
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* Number of frames that have been demuxed during avformat_find_stream_info()
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*/
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int codec_info_nb_frames;
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/**
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* Stream Identifier
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* This is the MPEG-TS stream identifier +1
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* 0 means unknown
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*/
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int stream_identifier;
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// Timestamp generation support:
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/**
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* Timestamp corresponding to the last dts sync point.
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*
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* Initialized when AVCodecParserContext.dts_sync_point >= 0 and
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* a DTS is received from the underlying container. Otherwise set to
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* AV_NOPTS_VALUE by default.
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*/
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int64_t first_dts;
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int64_t cur_dts;
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} FFStream;
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static av_always_inline FFStream *ffstream(AVStream *st)
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{
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return (FFStream*)st;
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}
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static av_always_inline const FFStream *cffstream(const AVStream *st)
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{
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return (FFStream*)st;
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}
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void avpriv_stream_set_need_parsing(AVStream *st, enum AVStreamParseType type);
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#ifdef __GNUC__
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#define dynarray_add(tab, nb_ptr, elem)\
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do {\
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__typeof__(tab) _tab = (tab);\
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__typeof__(elem) _elem = (elem);\
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(void)sizeof(**_tab == _elem); /* check that types are compatible */\
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av_dynarray_add(_tab, nb_ptr, _elem);\
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} while(0)
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#else
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#define dynarray_add(tab, nb_ptr, elem)\
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do {\
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av_dynarray_add((tab), nb_ptr, (elem));\
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} while(0)
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#endif
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#define RELATIVE_TS_BASE (INT64_MAX - (1LL << 48))
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static av_always_inline int is_relative(int64_t ts)
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{
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return ts > (RELATIVE_TS_BASE - (1LL << 48));
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}
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/**
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* Wrap a given time stamp, if there is an indication for an overflow
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*
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* @param st stream
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* @param timestamp the time stamp to wrap
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* @return resulting time stamp
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*/
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int64_t ff_wrap_timestamp(const AVStream *st, int64_t timestamp);
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void ff_flush_packet_queue(AVFormatContext *s);
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/**
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* Automatically create sub-directories
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*
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* @param path will create sub-directories by path
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* @return 0, or < 0 on error
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*/
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int ff_mkdir_p(const char *path);
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char *ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase);
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/**
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* Parse a string of hexadecimal strings. Any space between the hexadecimal
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* digits is ignored.
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*
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* @param data if non-null, the parsed data is written to this pointer
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* @param p the string to parse
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* @return the number of bytes written (or to be written, if data is null)
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*/
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int ff_hex_to_data(uint8_t *data, const char *p);
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/**
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* Add packet to an AVFormatContext's packet_buffer list, determining its
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* interleaved position using compare() function argument.
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* @return 0 on success, < 0 on error. pkt will always be blank on return.
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*/
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int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
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int (*compare)(AVFormatContext *, const AVPacket *, const AVPacket *));
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void ff_read_frame_flush(AVFormatContext *s);
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#define NTP_OFFSET 2208988800ULL
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#define NTP_OFFSET_US (NTP_OFFSET * 1000000ULL)
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/** Get the current time since NTP epoch in microseconds. */
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uint64_t ff_ntp_time(void);
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/**
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* Get the NTP time stamp formatted as per the RFC-5905.
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*
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* @param ntp_time NTP time in micro seconds (since NTP epoch)
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* @return the formatted NTP time stamp
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*/
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uint64_t ff_get_formatted_ntp_time(uint64_t ntp_time_us);
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/**
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* Parse the NTP time in micro seconds (since NTP epoch).
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*
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* @param ntp_ts NTP time stamp formatted as per the RFC-5905.
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* @return the time in micro seconds (since NTP epoch)
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*/
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uint64_t ff_parse_ntp_time(uint64_t ntp_ts);
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/**
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* Append the media-specific SDP fragment for the media stream c
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* to the buffer buff.
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*
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* Note, the buffer needs to be initialized, since it is appended to
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* existing content.
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*
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* @param buff the buffer to append the SDP fragment to
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* @param size the size of the buff buffer
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* @param st the AVStream of the media to describe
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* @param idx the global stream index
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* @param dest_addr the destination address of the media stream, may be NULL
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* @param dest_type the destination address type, may be NULL
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* @param port the destination port of the media stream, 0 if unknown
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* @param ttl the time to live of the stream, 0 if not multicast
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* @param fmt the AVFormatContext, which might contain options modifying
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* the generated SDP
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*/
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void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx,
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const char *dest_addr, const char *dest_type,
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int port, int ttl, AVFormatContext *fmt);
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/**
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* Write a packet to another muxer than the one the user originally
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* intended. Useful when chaining muxers, where one muxer internally
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* writes a received packet to another muxer.
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*
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* @param dst the muxer to write the packet to
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* @param dst_stream the stream index within dst to write the packet to
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* @param pkt the packet to be written. It will be returned blank when
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|
* av_interleaved_write_frame() is used, unchanged otherwise.
|
|
* @param src the muxer the packet originally was intended for
|
|
* @param interleave 0->use av_write_frame, 1->av_interleaved_write_frame
|
|
* @return the value av_write_frame returned
|
|
*/
|
|
int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
|
|
AVFormatContext *src, int interleave);
|
|
|
|
/**
|
|
* 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);
|
|
|
|
/**
|
|
* Same as ff_get_line but strip the white-space characters in the text tail
|
|
*
|
|
* @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
|
|
*/
|
|
int ff_get_chomp_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);
|
|
|
|
void ff_configure_buffers_for_index(AVFormatContext *s, int64_t time_tolerance);
|
|
|
|
/**
|
|
* 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, int64_t 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);
|
|
|
|
enum AVCodecID ff_guess_image2_codec(const char *filename);
|
|
|
|
const AVCodec *ff_find_decoder(AVFormatContext *s, const AVStream *st,
|
|
enum AVCodecID codec_id);
|
|
/**
|
|
* 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 avpriv_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp);
|
|
|
|
int ff_find_last_ts(AVFormatContext *s, int stream_index, int64_t *ts, int64_t *pos,
|
|
int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
|
|
|
|
/**
|
|
* 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 st 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 *st, 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);
|
|
|
|
/**
|
|
* Add an attached pic to an AVStream.
|
|
*
|
|
* @param st if set, the stream to add the attached pic to;
|
|
* if unset, a new stream will be added to s.
|
|
* @param pb AVIOContext to read data from if buf is unset.
|
|
* @param buf if set, it contains the data and size information to be used
|
|
* for the attached pic; if unset, data is read from pb.
|
|
* @param size the size of the data to read if buf is unset.
|
|
*
|
|
* @return 0 on success, < 0 on error. On error, this function removes
|
|
* the stream it has added (if any).
|
|
*/
|
|
int ff_add_attached_pic(AVFormatContext *s, AVStream *st, AVIOContext *pb,
|
|
AVBufferRef **buf, int size);
|
|
|
|
/**
|
|
* Interleave an AVPacket per dts so it can be muxed.
|
|
*
|
|
* @param s an AVFormatContext for output. pkt resp. out will be added to
|
|
* resp. taken from its packet buffer.
|
|
* @param out the interleaved packet will be output here
|
|
* @param pkt the input packet; will be blank on return if not NULL
|
|
* @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
|
|
* (in which case out may be uninitialized), < 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);
|
|
|
|
unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id);
|
|
|
|
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag);
|
|
|
|
int ff_is_intra_only(enum AVCodecID id);
|
|
|
|
/**
|
|
* 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 chosen timebase allows sample accurate timestamps based
|
|
* on the framerate or sample rate for audio streams. It also is
|
|
* at least as precise as 1/min_precision would be.
|
|
*/
|
|
AVRational ff_choose_timebase(AVFormatContext *s, AVStream *st, int min_precision);
|
|
|
|
/**
|
|
* Chooses a timebase for muxing the specified stream.
|
|
*/
|
|
enum AVChromaLocation ff_choose_chroma_location(AVFormatContext *s, AVStream *st);
|
|
|
|
/**
|
|
* Generate standard extradata for AVC-Intra based on width/height and field
|
|
* order.
|
|
*/
|
|
int ff_generate_avci_extradata(AVStream *st);
|
|
|
|
/**
|
|
* Add a bitstream filter to a stream.
|
|
*
|
|
* @param st output stream to add a filter to
|
|
* @param name the name of the filter to add
|
|
* @param args filter-specific argument string
|
|
* @return >0 on success;
|
|
* AVERROR code on failure
|
|
*/
|
|
int ff_stream_add_bitstream_filter(AVStream *st, const char *name, const char *args);
|
|
|
|
/**
|
|
* Copy encoding parameters from source to destination stream
|
|
*
|
|
* @param dst pointer to destination AVStream
|
|
* @param src pointer to source AVStream
|
|
* @return >=0 on success, AVERROR code on error
|
|
*/
|
|
int ff_stream_encode_params_copy(AVStream *dst, const AVStream *src);
|
|
|
|
/**
|
|
* Wrap ffurl_move() and log if error happens.
|
|
*
|
|
* @param url_src source path
|
|
* @param url_dst destination path
|
|
* @return 0 or AVERROR on failure
|
|
*/
|
|
int ff_rename(const char *url_src, const char *url_dst, void *logctx);
|
|
|
|
/**
|
|
* Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end
|
|
* which is always set to 0.
|
|
*
|
|
* Previously allocated extradata in par will be freed.
|
|
*
|
|
* @param size size of extradata
|
|
* @return 0 if OK, AVERROR_xxx on error
|
|
*/
|
|
int ff_alloc_extradata(AVCodecParameters *par, int size);
|
|
|
|
/**
|
|
* Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end
|
|
* which is always set to 0 and fill it from pb.
|
|
*
|
|
* @param size size of extradata
|
|
* @return >= 0 if OK, AVERROR_xxx on error
|
|
*/
|
|
int ff_get_extradata(AVFormatContext *s, AVCodecParameters *par, AVIOContext *pb, int size);
|
|
|
|
/**
|
|
* add frame for rfps calculation.
|
|
*
|
|
* @param dts timestamp of the i-th frame
|
|
* @return 0 if OK, AVERROR_xxx on error
|
|
*/
|
|
int ff_rfps_add_frame(AVFormatContext *ic, AVStream *st, int64_t dts);
|
|
|
|
void ff_rfps_calculate(AVFormatContext *ic);
|
|
|
|
/**
|
|
* Flags for AVFormatContext.write_uncoded_frame()
|
|
*/
|
|
enum AVWriteUncodedFrameFlags {
|
|
|
|
/**
|
|
* Query whether the feature is possible on this stream.
|
|
* The frame argument is ignored.
|
|
*/
|
|
AV_WRITE_UNCODED_FRAME_QUERY = 0x0001,
|
|
|
|
};
|
|
|
|
/**
|
|
* Copies the whilelists from one context to the other
|
|
*/
|
|
int ff_copy_whiteblacklists(AVFormatContext *dst, const AVFormatContext *src);
|
|
|
|
/**
|
|
* Returned by demuxers to indicate that data was consumed but discarded
|
|
* (ignored streams or junk data). The framework will re-call the demuxer.
|
|
*/
|
|
#define FFERROR_REDO FFERRTAG('R','E','D','O')
|
|
|
|
/**
|
|
* Utility function to open IO stream of output format.
|
|
*
|
|
* @param s AVFormatContext
|
|
* @param url URL or file name to open for writing
|
|
* @options optional options which will be passed to io_open callback
|
|
* @return >=0 on success, negative AVERROR in case of failure
|
|
*/
|
|
int ff_format_output_open(AVFormatContext *s, const char *url, AVDictionary **options);
|
|
|
|
/*
|
|
* A wrapper around AVFormatContext.io_close that should be used
|
|
* instead of calling the pointer directly.
|
|
*/
|
|
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb);
|
|
|
|
/**
|
|
* Utility function to check if the file uses http or https protocol
|
|
*
|
|
* @param s AVFormatContext
|
|
* @param filename URL or file name to open for writing
|
|
*/
|
|
int ff_is_http_proto(char *filename);
|
|
|
|
/**
|
|
* Parse creation_time in AVFormatContext metadata if exists and warn if the
|
|
* parsing fails.
|
|
*
|
|
* @param s AVFormatContext
|
|
* @param timestamp parsed timestamp in microseconds, only set on successful parsing
|
|
* @param return_seconds set this to get the number of seconds in timestamp instead of microseconds
|
|
* @return 1 if OK, 0 if the metadata was not present, AVERROR(EINVAL) on parse error
|
|
*/
|
|
int ff_parse_creation_time_metadata(AVFormatContext *s, int64_t *timestamp, int return_seconds);
|
|
|
|
/**
|
|
* Standardize creation_time metadata in AVFormatContext to an ISO-8601
|
|
* timestamp string.
|
|
*
|
|
* @param s AVFormatContext
|
|
* @return <0 on error
|
|
*/
|
|
int ff_standardize_creation_time(AVFormatContext *s);
|
|
|
|
#define CONTAINS_PAL 2
|
|
/**
|
|
* Reshuffles the lines to use the user specified stride.
|
|
*
|
|
* @param ppkt input and output packet
|
|
* @return negative error code or
|
|
* 0 if no new packet was allocated
|
|
* non-zero if a new packet was allocated and ppkt has to be freed
|
|
* CONTAINS_PAL if in addition to a new packet the old contained a palette
|
|
*/
|
|
int ff_reshuffle_raw_rgb(AVFormatContext *s, AVPacket **ppkt, AVCodecParameters *par, int expected_stride);
|
|
|
|
/**
|
|
* Retrieves the palette from a packet, either from side data, or
|
|
* appended to the video data in the packet itself (raw video only).
|
|
* It is commonly used after a call to ff_reshuffle_raw_rgb().
|
|
*
|
|
* Use 0 for the ret parameter to check for side data only.
|
|
*
|
|
* @param pkt pointer to packet before calling ff_reshuffle_raw_rgb()
|
|
* @param ret return value from ff_reshuffle_raw_rgb(), or 0
|
|
* @param palette pointer to palette buffer
|
|
* @return negative error code or
|
|
* 1 if the packet has a palette, else 0
|
|
*/
|
|
int ff_get_packet_palette(AVFormatContext *s, AVPacket *pkt, int ret, uint32_t *palette);
|
|
|
|
struct AVBPrint;
|
|
/**
|
|
* Finalize buf into extradata and set its size appropriately.
|
|
*/
|
|
int ff_bprint_to_codecpar_extradata(AVCodecParameters *par, struct AVBPrint *buf);
|
|
|
|
/**
|
|
* Find the next packet in the interleaving queue for the given stream.
|
|
*
|
|
* @return a pointer to a packet if one was found, NULL otherwise.
|
|
*/
|
|
const AVPacket *ff_interleaved_peek(AVFormatContext *s, int stream);
|
|
|
|
int ff_get_muxer_ts_offset(AVFormatContext *s, int stream_index, int64_t *offset);
|
|
|
|
int ff_lock_avformat(void);
|
|
int ff_unlock_avformat(void);
|
|
|
|
/**
|
|
* Set AVFormatContext url field to the provided pointer. The pointer must
|
|
* point to a valid string. The existing url field is freed if necessary. Also
|
|
* set the legacy filename field to the same string which was provided in url.
|
|
*/
|
|
void ff_format_set_url(AVFormatContext *s, char *url);
|
|
|
|
void avpriv_register_devices(const AVOutputFormat * const o[], const AVInputFormat * const i[]);
|
|
|
|
#endif /* AVFORMAT_INTERNAL_H */
|