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prop-builder: add helper to make properties and formats

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Use this to make a format filter. Use the filter to negotiate
a format automatically.
This commit is contained in:
Wim Taymans 2017-02-20 17:22:46 +01:00
parent c433df9d32
commit 808d6b6fca
11 changed files with 590 additions and 13 deletions
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80
spa/lib/prop-builder.h Normal file
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/* Simple Plugin API
* Copyright (C) 2016 Wim Taymans <wim.taymans@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __SPA_PROP_BUILDER_H__
#define __SPA_PROP_BUILDER_H__
#ifdef __cplusplus
extern "C" {
#endif
#include <spa/props.h>
typedef struct SpaPropBuilderRange SpaPropBuilderRange;
typedef struct SpaPropBuilderInfo SpaPropBuilderInfo;
typedef struct SpaPropBuilder SpaPropBuilder;
struct SpaPropBuilderRange {
SpaPropBuilderRange *next;
SpaPropRangeInfo info;
};
struct SpaPropBuilderInfo {
SpaPropBuilderInfo *next;
SpaPropInfo info;
const void *value;
SpaPropBuilderRange *ranges;
};
struct SpaPropBuilder {
SpaPropBuilderInfo *head;
SpaPropBuilderInfo *info;
SpaPropBuilderRange *range;
size_t n_prop_info;
size_t n_range_info;
size_t size;
size_t struct_size;
off_t prop_offset;
void *dest;
void *userdata;
void (*finish) (SpaPropBuilder *b);
};
void spa_prop_builder_init (SpaPropBuilder *b,
size_t struct_size,
off_t prop_offset);
void spa_prop_builder_add_info (SpaPropBuilder *b,
SpaPropBuilderInfo *i);
void spa_prop_builder_add_range (SpaPropBuilder *b,
SpaPropBuilderRange *r);
void * spa_prop_builder_finish (SpaPropBuilder *b);
SpaResult spa_props_filter (SpaPropBuilder *b,
const SpaProps *props,
const SpaProps *filter);
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* __SPA_PROP_BUILDER_H__ */