pipewire/spa/lib/format.c

/* 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.
 */

#include <stdint.h>
#include <stddef.h>
#include <stdio.h>
#include <string.h>

#include <spa/format-builder.h>
#include <spa/video/format-utils.h>
#include <lib/props.h>
#include <lib/mapper.h>

int
spa_format_filter(const struct spa_format *format,
		  const struct spa_format *filter,
		  struct spa_pod_builder *result)
{
	struct spa_pod_frame f;
	int res;

	if (format == NULL || result == NULL)
		return SPA_RESULT_INVALID_ARGUMENTS;

	if (filter == NULL) {
		spa_pod_builder_raw_padded(result, format, SPA_POD_SIZE(format));
		return SPA_RESULT_OK;
	}

	if (SPA_FORMAT_MEDIA_TYPE(filter) != SPA_FORMAT_MEDIA_TYPE(format) ||
	    SPA_FORMAT_MEDIA_SUBTYPE(filter) != SPA_FORMAT_MEDIA_SUBTYPE(format))
		return SPA_RESULT_INVALID_MEDIA_TYPE;

	spa_pod_builder_push_format(result, &f, filter->body.obj_body.type,
				    SPA_FORMAT_MEDIA_TYPE(filter),
				    SPA_FORMAT_MEDIA_SUBTYPE(filter));
	res = spa_props_filter(result,
			       SPA_POD_CONTENTS(struct spa_format, format),
			       SPA_POD_CONTENTS_SIZE(struct spa_format, format),
			       SPA_POD_CONTENTS(struct spa_format, filter),
			       SPA_POD_CONTENTS_SIZE(struct spa_format, filter));
	spa_pod_builder_pop(result, &f);

	return res;
}