video/dsp-utils.h

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/* Simple Plugin API
 *
 * Copyright © 2018 Wim Taymans
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */
 
#ifndef SPA_VIDEO_DSP_UTILS_H
#define SPA_VIDEO_DSP_UTILS_H
 
#ifdef __cplusplus
extern "C" {
#endif
 
#include <spa/pod/parser.h>
#include <spa/pod/builder.h>
#include <spa/param/video/dsp.h>
 
static inline int
spa_format_video_dsp_parse(const struct spa_pod *format,
                           struct spa_video_info_dsp *info)
{
        info->flags = SPA_VIDEO_FLAG_NONE;
        if (spa_pod_find_prop (format, NULL, SPA_FORMAT_VIDEO_modifier)) {
                info->flags |= SPA_VIDEO_FLAG_MODIFIER;
        }
 
        return spa_pod_parse_object(format,
                SPA_TYPE_OBJECT_Format, NULL,
                SPA_FORMAT_VIDEO_format,                SPA_POD_OPT_Id(&info->format),
                SPA_FORMAT_VIDEO_modifier,              SPA_POD_OPT_Long(&info->modifier));
}
 
static inline struct spa_pod *
spa_format_video_dsp_build(struct spa_pod_builder *builder, uint32_t id,
                           struct spa_video_info_dsp *info)
{
        struct spa_pod_frame f;
        spa_pod_builder_push_object(builder, &f, SPA_TYPE_OBJECT_Format, id);
        spa_pod_builder_add(builder,
                        SPA_FORMAT_mediaType,           SPA_POD_Id(SPA_MEDIA_TYPE_video),
                        SPA_FORMAT_mediaSubtype,        SPA_POD_Id(SPA_MEDIA_SUBTYPE_dsp),
                        0);
        if (info->format != SPA_VIDEO_FORMAT_UNKNOWN)
                spa_pod_builder_add(builder,
                        SPA_FORMAT_VIDEO_format,        SPA_POD_Id(info->format), 0);
        if (info->modifier != 0 || info->flags & SPA_VIDEO_FLAG_MODIFIER)
                spa_pod_builder_add(builder,
                        SPA_FORMAT_VIDEO_modifier,      SPA_POD_Long(info->modifier), 0);
        return (struct spa_pod*)spa_pod_builder_pop(builder, &f);
}
 
#ifdef __cplusplus
} /* extern "C" */
#endif
 
#endif /* SPA_VIDEO_DSP_UTILS_H */