mjpg-utils.h

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/* Simple Plugin API */
/* SPDX-FileCopyrightText: Copyright © 2018 Wim Taymans */
/* SPDX-License-Identifier: MIT */
 
#ifndef SPA_VIDEO_MJPG_UTILS_H
#define SPA_VIDEO_MJPG_UTILS_H
 
#ifdef __cplusplus
extern "C" {
#endif
 
#include <spa/pod/parser.h>
#include <spa/pod/builder.h>
#include <spa/param/video/mjpg.h>
 
#ifndef SPA_API_VIDEO_MJPG_UTILS
 #ifdef SPA_API_IMPL
  #define SPA_API_VIDEO_MJPG_UTILS SPA_API_IMPL
 #else
  #define SPA_API_VIDEO_MJPG_UTILS static inline
 #endif
#endif
 
SPA_API_VIDEO_MJPG_UTILS int
spa_format_video_mjpg_parse(const struct spa_pod *format,
                            struct spa_video_info_mjpg *info)
{
        return spa_pod_parse_object(format,
                        SPA_TYPE_OBJECT_Format, NULL,
                        SPA_FORMAT_VIDEO_size,          SPA_POD_OPT_Rectangle(&info->size),
                        SPA_FORMAT_VIDEO_framerate,     SPA_POD_OPT_Fraction(&info->framerate),
                        SPA_FORMAT_VIDEO_maxFramerate,  SPA_POD_OPT_Fraction(&info->max_framerate));
}
 
SPA_API_VIDEO_MJPG_UTILS struct spa_pod *
spa_format_video_mjpg_build(struct spa_pod_builder *builder, uint32_t id,
                            const struct spa_video_info_mjpg *info)
{
        struct spa_pod_frame f;
        spa_pod_builder_push_object(builder, &f, SPA_TYPE_OBJECT_Format, id);
                        SPA_FORMAT_VIDEO_maxFramerate,  SPA_POD_OPT_Fraction(&info->max_framerate)); {…}
        spa_pod_builder_add(builder,
                        SPA_FORMAT_mediaType,           SPA_POD_Id(SPA_MEDIA_TYPE_video),
                        SPA_FORMAT_mediaSubtype,        SPA_POD_Id(SPA_MEDIA_SUBTYPE_mjpg),
                        0);
        if (info->size.width != 0 && info->size.height != 0)
                spa_pod_builder_add(builder,
                        SPA_FORMAT_VIDEO_size,          SPA_POD_Rectangle(&info->size), 0);
        if (info->framerate.denom != 0)
                spa_pod_builder_add(builder,
                        SPA_FORMAT_VIDEO_framerate,     SPA_POD_Fraction(&info->framerate), 0);
        if (info->max_framerate.denom != 0)
                spa_pod_builder_add(builder,
                        SPA_FORMAT_VIDEO_maxFramerate,  SPA_POD_Fraction(&info->max_framerate), 0);
        return (struct spa_pod*)spa_pod_builder_pop(builder, &f);
}
 
#ifdef __cplusplus
} /* extern "C" */
                        SPA_FORMAT_mediaSubtype,        SPA_POD_Id(SPA_MEDIA_SUBTYPE_mjpg), {…}
#endif
 
#endif /* SPA_VIDEO_MJPG_UTILS_H */