mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-28 20:53:54 +02:00
132 lines
5.0 KiB
C
132 lines
5.0 KiB
C
/*
|
|
* 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 AVCODEC_CBS_BSF_H
|
|
#define AVCODEC_CBS_BSF_H
|
|
|
|
#include "cbs.h"
|
|
|
|
|
|
typedef struct CBSBSFType {
|
|
enum AVCodecID codec_id;
|
|
|
|
// Name of a frame fragment in this codec (e.g. "access unit",
|
|
// "temporal unit").
|
|
const char *fragment_name;
|
|
|
|
// Name of a unit for this BSF, for use in error messages (e.g.
|
|
// "NAL unit", "OBU").
|
|
const char *unit_name;
|
|
|
|
// Update the content of a fragment with whatever metadata changes
|
|
// are desired. The associated AVPacket is provided so that any side
|
|
// data associated with the fragment can be inspected or edited. If
|
|
// pkt is NULL, then an extradata header fragment is being updated.
|
|
int (*update_fragment)(AVBSFContext *bsf, AVPacket *pkt,
|
|
CodedBitstreamFragment *frag);
|
|
} CBSBSFType;
|
|
|
|
// Common structure for all generic CBS BSF users. An instance of this
|
|
// structure must be the first member of the BSF private context (to be
|
|
// pointed to by AVBSFContext.priv_data).
|
|
typedef struct CBSBSFContext {
|
|
const AVClass *class;
|
|
const CBSBSFType *type;
|
|
|
|
CodedBitstreamContext *input;
|
|
CodedBitstreamContext *output;
|
|
CodedBitstreamFragment fragment;
|
|
} CBSBSFContext;
|
|
|
|
/**
|
|
* Initialise generic CBS BSF setup.
|
|
*
|
|
* Creates the input and output CBS instances, and applies the filter to
|
|
* the extradata on the input codecpar if any is present.
|
|
*
|
|
* Since it calls the update_fragment() function immediately to deal with
|
|
* extradata, this should be called after any codec-specific setup is done
|
|
* (probably at the end of the AVBitStreamFilter.init function).
|
|
*/
|
|
int ff_cbs_bsf_generic_init(AVBSFContext *bsf, const CBSBSFType *type);
|
|
|
|
/**
|
|
* Close a generic CBS BSF instance.
|
|
*
|
|
* If no other deinitialisation is required then this function can be used
|
|
* directly as AVBitStreamFilter.close.
|
|
*/
|
|
void ff_cbs_bsf_generic_close(AVBSFContext *bsf);
|
|
|
|
/**
|
|
* Filter operation for CBS BSF.
|
|
*
|
|
* Reads the input packet into a CBS fragment, calls update_fragment() on
|
|
* it, then writes the result to an output packet. If the input packet
|
|
* has AV_PKT_DATA_NEW_EXTRADATA side-data associated with it then it does
|
|
* the same thing to that new extradata to form the output side-data first.
|
|
*
|
|
* If the BSF does not do anything else then this function can be used
|
|
* directly as AVBitStreamFilter.filter.
|
|
*/
|
|
int ff_cbs_bsf_generic_filter(AVBSFContext *bsf, AVPacket *pkt);
|
|
|
|
|
|
// Options for element manipulation.
|
|
enum {
|
|
// Pass this element through unchanged.
|
|
BSF_ELEMENT_PASS,
|
|
// Insert this element, replacing any existing instances of it.
|
|
// Associated values may be provided explicitly (as addtional options)
|
|
// or implicitly (either as side data or deduced from other parts of
|
|
// the stream).
|
|
BSF_ELEMENT_INSERT,
|
|
// Remove this element if it appears in the stream.
|
|
BSF_ELEMENT_REMOVE,
|
|
// Extract this element to side data, so that further manipulation
|
|
// can happen elsewhere.
|
|
BSF_ELEMENT_EXTRACT,
|
|
};
|
|
|
|
#define BSF_ELEMENT_OPTIONS_PIR(name, help, field, opt_flags) \
|
|
{ name, help, OFFSET(field), AV_OPT_TYPE_INT, \
|
|
{ .i64 = BSF_ELEMENT_PASS }, \
|
|
BSF_ELEMENT_PASS, BSF_ELEMENT_REMOVE, opt_flags, name }, \
|
|
{ "pass", NULL, 0, AV_OPT_TYPE_CONST, \
|
|
{ .i64 = BSF_ELEMENT_PASS }, .flags = opt_flags, .unit = name }, \
|
|
{ "insert", NULL, 0, AV_OPT_TYPE_CONST, \
|
|
{ .i64 = BSF_ELEMENT_INSERT }, .flags = opt_flags, .unit = name }, \
|
|
{ "remove", NULL, 0, AV_OPT_TYPE_CONST, \
|
|
{ .i64 = BSF_ELEMENT_REMOVE }, .flags = opt_flags, .unit = name }
|
|
|
|
#define BSF_ELEMENT_OPTIONS_PIRE(name, help, field, opt_flags) \
|
|
{ name, help, OFFSET(field), AV_OPT_TYPE_INT, \
|
|
{ .i64 = BSF_ELEMENT_PASS }, \
|
|
BSF_ELEMENT_PASS, BSF_ELEMENT_EXTRACT, opt_flags, name }, \
|
|
{ "pass", NULL, 0, AV_OPT_TYPE_CONST, \
|
|
{ .i64 = BSF_ELEMENT_PASS }, .flags = opt_flags, .unit = name }, \
|
|
{ "insert", NULL, 0, AV_OPT_TYPE_CONST, \
|
|
{ .i64 = BSF_ELEMENT_INSERT }, .flags = opt_flags, .unit = name }, \
|
|
{ "remove", NULL, 0, AV_OPT_TYPE_CONST, \
|
|
{ .i64 = BSF_ELEMENT_REMOVE }, .flags = opt_flags, .unit = name }, \
|
|
{ "extract", NULL, 0, AV_OPT_TYPE_CONST, \
|
|
{ .i64 = BSF_ELEMENT_EXTRACT }, .flags = opt_flags, .unit = name } \
|
|
|
|
|
|
#endif /* AVCODEC_CBS_BSF_H */
|