mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-21 06:50:44 +00:00
a24bccc238
AVOutputFormat has default codecs for audio, video and subtitle and often these are the only codecs of this type allowed. So add a flag to AVOutputFormat so that this can be checked generically. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
281 lines
10 KiB
C
281 lines
10 KiB
C
/*
|
|
* copyright (c) 2001 Fabrice Bellard
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#ifndef AVFORMAT_MUX_H
|
|
#define AVFORMAT_MUX_H
|
|
|
|
#include <stdint.h>
|
|
#include "libavcodec/packet.h"
|
|
#include "avformat.h"
|
|
|
|
struct AVDeviceInfoList;
|
|
|
|
/**
|
|
* This flag indicates that the muxer stores data internally
|
|
* and supports flushing it. Flushing is signalled by sending
|
|
* a NULL packet to the muxer's write_packet callback;
|
|
* without this flag, a muxer never receives NULL packets.
|
|
* So the documentation of write_packet below for the semantics
|
|
* of the return value in case of flushing.
|
|
*/
|
|
#define FF_OFMT_FLAG_ALLOW_FLUSH (1 << 1)
|
|
/**
|
|
* If this flag is set, it indicates that for each codec type
|
|
* whose corresponding default codec (i.e. AVOutputFormat.audio_codec,
|
|
* AVOutputFormat.video_codec and AVOutputFormat.subtitle_codec)
|
|
* is set (i.e. != AV_CODEC_ID_NONE) only one stream of this type
|
|
* can be muxed. It furthermore indicates that no stream with
|
|
* a codec type that has no default codec or whose default codec
|
|
* is AV_CODEC_ID_NONE can be muxed.
|
|
* Both of these restrictions are checked generically before
|
|
* the actual muxer's init/write_header callbacks.
|
|
*/
|
|
#define FF_OFMT_FLAG_MAX_ONE_OF_EACH (1 << 2)
|
|
/**
|
|
* If this flag is set, then the only permitted audio/video/subtitle
|
|
* codec ids are AVOutputFormat.audio/video/subtitle_codec;
|
|
* if any of the latter is unset (i.e. equal to AV_CODEC_ID_NONE),
|
|
* then no stream of the corresponding type is supported.
|
|
* In addition, codec types without default codec field
|
|
* are disallowed.
|
|
*/
|
|
#define FF_OFMT_FLAG_ONLY_DEFAULT_CODECS (1 << 3)
|
|
|
|
typedef struct FFOutputFormat {
|
|
/**
|
|
* The public AVOutputFormat. See avformat.h for it.
|
|
*/
|
|
AVOutputFormat p;
|
|
/**
|
|
* size of private data so that it can be allocated in the wrapper
|
|
*/
|
|
int priv_data_size;
|
|
|
|
/**
|
|
* Internal flags. See FF_OFMT_FLAG_* above and FF_FMT_FLAG_* in internal.h.
|
|
*/
|
|
int flags_internal;
|
|
|
|
int (*write_header)(AVFormatContext *);
|
|
/**
|
|
* Write a packet. If FF_OFMT_FLAG_ALLOW_FLUSH is set in flags_internal,
|
|
* pkt can be NULL in order to flush data buffered in the muxer.
|
|
* When flushing, return 0 if there still is more data to flush,
|
|
* or 1 if everything was flushed and there is no more buffered
|
|
* data.
|
|
*/
|
|
int (*write_packet)(AVFormatContext *, AVPacket *pkt);
|
|
int (*write_trailer)(AVFormatContext *);
|
|
/**
|
|
* A format-specific function for interleavement.
|
|
* If unset, packets will be interleaved by dts.
|
|
*
|
|
* @param s An AVFormatContext for output. pkt will be added to
|
|
* resp. taken from its packet buffer.
|
|
* @param[in,out] pkt A packet to be interleaved if has_packet is set;
|
|
* also used to return packets. If no packet is returned
|
|
* (e.g. on error), pkt is blank on return.
|
|
* @param flush 1 if no further packets are available as input and
|
|
* all remaining packets should be output.
|
|
* @param has_packet If set, pkt contains a packet to be interleaved
|
|
* on input; otherwise pkt is blank on input.
|
|
* @return 1 if a packet was output, 0 if no packet could be output,
|
|
* < 0 if an error occurred
|
|
*/
|
|
int (*interleave_packet)(AVFormatContext *s, AVPacket *pkt,
|
|
int flush, int has_packet);
|
|
/**
|
|
* Test if the given codec can be stored in this container.
|
|
*
|
|
* @return 1 if the codec is supported, 0 if it is not.
|
|
* A negative number if unknown.
|
|
* MKTAG('A', 'P', 'I', 'C') if the codec is only supported as AV_DISPOSITION_ATTACHED_PIC
|
|
*/
|
|
int (*query_codec)(enum AVCodecID id, int std_compliance);
|
|
|
|
void (*get_output_timestamp)(AVFormatContext *s, int stream,
|
|
int64_t *dts, int64_t *wall);
|
|
/**
|
|
* Allows sending messages from application to device.
|
|
*/
|
|
int (*control_message)(AVFormatContext *s, int type,
|
|
void *data, size_t data_size);
|
|
|
|
/**
|
|
* Write an uncoded AVFrame.
|
|
*
|
|
* See av_write_uncoded_frame() for details.
|
|
*
|
|
* The library will free *frame afterwards, but the muxer can prevent it
|
|
* by setting the pointer to NULL.
|
|
*/
|
|
int (*write_uncoded_frame)(AVFormatContext *, int stream_index,
|
|
struct AVFrame **frame, unsigned flags);
|
|
/**
|
|
* Returns device list with it properties.
|
|
* @see avdevice_list_devices() for more details.
|
|
*/
|
|
int (*get_device_list)(AVFormatContext *s, struct AVDeviceInfoList *device_list);
|
|
/**
|
|
* Initialize format. May allocate data here, and set any AVFormatContext or
|
|
* AVStream parameters that need to be set before packets are sent.
|
|
* This method must not write output.
|
|
*
|
|
* Return 0 if streams were fully configured, 1 if not, negative AVERROR on failure
|
|
*
|
|
* Any allocations made here must be freed in deinit().
|
|
*/
|
|
int (*init)(AVFormatContext *);
|
|
/**
|
|
* Deinitialize format. If present, this is called whenever the muxer is being
|
|
* destroyed, regardless of whether or not the header has been written.
|
|
*
|
|
* If a trailer is being written, this is called after write_trailer().
|
|
*
|
|
* This is called if init() fails as well.
|
|
*/
|
|
void (*deinit)(AVFormatContext *);
|
|
/**
|
|
* Set up any necessary bitstream filtering and extract any extra data needed
|
|
* for the global header.
|
|
*
|
|
* @note pkt might have been directly forwarded by a meta-muxer; therefore
|
|
* pkt->stream_index as well as the pkt's timebase might be invalid.
|
|
* Return 0 if more packets from this stream must be checked; 1 if not.
|
|
*/
|
|
int (*check_bitstream)(AVFormatContext *s, AVStream *st,
|
|
const AVPacket *pkt);
|
|
} FFOutputFormat;
|
|
|
|
static inline const FFOutputFormat *ffofmt(const AVOutputFormat *fmt)
|
|
{
|
|
return (const FFOutputFormat*)fmt;
|
|
}
|
|
|
|
/**
|
|
* Add packet to an AVFormatContext's packet_buffer list, determining its
|
|
* interleaved position using compare() function argument.
|
|
* @return 0 on success, < 0 on error. pkt will always be blank on return.
|
|
*/
|
|
int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
|
|
int (*compare)(AVFormatContext *, const AVPacket *, const AVPacket *));
|
|
|
|
/**
|
|
* Interleave an AVPacket per dts so it can be muxed.
|
|
* See the documentation of AVOutputFormat.interleave_packet for details.
|
|
*/
|
|
int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *pkt,
|
|
int flush, int has_packet);
|
|
|
|
/**
|
|
* Interleave packets directly in the order in which they arrive
|
|
* without any sort of buffering.
|
|
*/
|
|
int ff_interleave_packet_passthrough(AVFormatContext *s, AVPacket *pkt,
|
|
int flush, int has_packet);
|
|
|
|
/**
|
|
* 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);
|
|
|
|
/**
|
|
* 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);
|
|
|
|
/**
|
|
* Write a packet to another muxer than the one the user originally
|
|
* intended. Useful when chaining muxers, where one muxer internally
|
|
* writes a received packet to another muxer.
|
|
*
|
|
* @param dst the muxer to write the packet to
|
|
* @param dst_stream the stream index within dst to write the packet to
|
|
* @param pkt the packet to be written. It will be returned blank when
|
|
* 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);
|
|
|
|
/**
|
|
* 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,
|
|
|
|
};
|
|
|
|
/**
|
|
* Make shift_size amount of space at read_start by shifting data in the output
|
|
* at read_start until the current IO position. The underlying IO context must
|
|
* be seekable.
|
|
*/
|
|
int ff_format_shift_data(AVFormatContext *s, int64_t read_start, int shift_size);
|
|
|
|
/**
|
|
* 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);
|
|
|
|
/**
|
|
* 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);
|
|
|
|
#endif /* AVFORMAT_MUX_H */
|