dsp-utils.h

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/* Simple Plugin API */
/* SPDX-FileCopyrightText: Copyright © 2018 Wim Taymans */
/* SPDX-License-Identifier: MIT */
 
#ifndef SPA_VIDEO_DSP_UTILS_H
#define SPA_VIDEO_DSP_UTILS_H
 
#include <spa/pod/iter.h>
#include <spa/pod/parser.h>
#include <spa/pod/builder.h>
#include <spa/param/video/dsp.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
#ifndef SPA_API_VIDEO_DSP_UTILS
 #ifdef SPA_API_IMPL
  #define SPA_API_VIDEO_DSP_UTILS SPA_API_IMPL
 #else
  #define SPA_API_VIDEO_DSP_UTILS static inline
 #endif
#endif
 
SPA_API_VIDEO_DSP_UTILS int
spa_format_video_dsp_parse(const struct spa_pod *format,
                           struct spa_video_info_dsp *info)
{
        info->flags = SPA_VIDEO_FLAG_NONE;
        const struct spa_pod_prop *mod_prop;
        if ((mod_prop = spa_pod_find_prop (format, NULL, SPA_FORMAT_VIDEO_modifier)) != NULL) {
                info->flags |= SPA_VIDEO_FLAG_MODIFIER;
                if ((mod_prop->flags & SPA_POD_PROP_FLAG_DONT_FIXATE) == SPA_POD_PROP_FLAG_DONT_FIXATE)
                        info->flags |= SPA_VIDEO_FLAG_MODIFIER_FIXATION_REQUIRED;
        }
 
        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));
}
 
SPA_API_VIDEO_DSP_UTILS struct spa_pod *
spa_format_video_dsp_build(struct spa_pod_builder *builder, uint32_t id,
                           const 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_prop(builder,
                        SPA_FORMAT_VIDEO_modifier,      SPA_POD_PROP_FLAG_MANDATORY);
                spa_pod_builder_long(builder,           info->modifier);
        }
        return (struct spa_pod*)spa_pod_builder_pop(builder, &f);
}
 
#ifdef __cplusplus
} /* extern "C" */
#endif
 
#endif /* SPA_VIDEO_DSP_UTILS_H */