// --------------------------------------------------------------------------------------------------------------------
// <copyright file="HBFunctions.cs" company="HandBrake Project (http://handbrake.fr)">
//   This file is part of the HandBrake source code - It may be used under the terms of the GNU General Public License.
// </copyright>
// <summary>
//   Defines the HBFunctions type.
// </summary>
// <auto-generated> Disable Stylecop Warnings for this file  </auto-generated>
// --------------------------------------------------------------------------------------------------------------------

namespace HandBrake.ApplicationServices.Interop.HbLib
{
    using System;
    using System.Runtime.InteropServices;

    /// <summary>
    /// Contains p-invoke function declarations to hblib.
    /// </summary>
    public static class HBFunctions
    {
        [DllImport("hb.dll", EntryPoint = "hb_register_logger", CallingConvention = CallingConvention.Cdecl)]
        public static extern void hb_register_logger(LoggingCallback callback);

        [DllImport("hb.dll", EntryPoint = "hb_register_error_handler", CallingConvention = CallingConvention.Cdecl)]
        public static extern void hb_register_error_handler(LoggingCallback callback);

        [DllImport("hb.dll", EntryPoint = "hb_global_init", CallingConvention = CallingConvention.Cdecl)]
        public static extern int hb_global_init();

        /// Return Type: hb_handle_t*
        ///verbose: int
        ///update_check: int
        [DllImport("hb.dll", EntryPoint = "hb_init", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_init(int verbose, int update_check);


        /// Return Type: hb_handle_t*
        ///verbose: int
        ///update_check: int
        [DllImport("hb.dll", EntryPoint = "hb_init_dl", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_init_dl(int verbose, int update_check);


        /// Return Type: char*
        ///param0: hb_handle_t*
        [DllImport("hb.dll", EntryPoint = "hb_get_version", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_get_version(IntPtr hbHandle);


        /// Return Type: int
        ///param0: hb_handle_t*
        [DllImport("hb.dll", EntryPoint = "hb_get_build", CallingConvention = CallingConvention.Cdecl)]
        public static extern int hb_get_build(IntPtr hbHandle);


        /// Return Type: int
        ///h: hb_handle_t*
        ///version: char**
        [DllImport("hb.dll", EntryPoint = "hb_check_update", CallingConvention = CallingConvention.Cdecl)]
        public static extern int hb_check_update(IntPtr handle, ref IntPtr version);


        /// Return Type: char*
        ///path: char*
        [DllImport("hb.dll", EntryPoint = "hb_dvd_name", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_dvd_name(IntPtr path);


        /// Return Type: void
        ///enable: int
        [DllImport("hb.dll", EntryPoint = "hb_dvd_set_dvdnav", CallingConvention = CallingConvention.Cdecl)]
        public static extern void hb_dvd_set_dvdnav(int enable);


        /// Return Type: void
        ///param0: hb_handle_t*
        ///path: char*
        ///title_index: int
        ///preview_count: int
        ///store_previews: int
        [DllImport("hb.dll", EntryPoint = "hb_scan", CallingConvention = CallingConvention.Cdecl)]
        public static extern void hb_scan(IntPtr hbHandle, IntPtr path, int title_index, int preview_count, int store_previews, ulong min_duration);

        [DllImport("hb.dll", EntryPoint = "hb_scan_stop", CallingConvention = CallingConvention.Cdecl)]
        public static extern void hb_scan_stop(IntPtr hbHandle);

        /// Return Type: hb_list_t*
        ///param0: hb_handle_t*
        [DllImport("hb.dll", EntryPoint = "hb_get_titles", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_get_titles(IntPtr hbHandle);

        [DllImport("hb.dll", EntryPoint = "hb_set_anamorphic_size2", CallingConvention = CallingConvention.Cdecl)]
        public static extern void hb_set_anamorphic_size2(ref hb_geometry_s sourceGeometry, ref hb_geometry_settings_s uiGeometry, ref hb_geometry_s result);
        

        /// Return Type: int
        ///param0: hb_handle_t*
        [DllImport("hb.dll", EntryPoint = "hb_count", CallingConvention = CallingConvention.Cdecl)]
        public static extern int hb_count(IntPtr hbHandle);


        /// Return Type: hb_job_t*
        ///param0: hb_handle_t*
        ///param1: int
        [DllImport("hb.dll", EntryPoint = "hb_job", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_job(IntPtr hbHandle, int jobIndex);

        /// Return Type: void
        ///param0: hb_handle_t*
        ///param1: hb_job_t*
        [DllImport("hb.dll", EntryPoint = "hb_rem", CallingConvention = CallingConvention.Cdecl)]
        public static extern void hb_rem(IntPtr hbHandle, IntPtr job);


        /// Return Type: void
        ///param0: hb_handle_t*
        [DllImport("hb.dll", EntryPoint = "hb_start", CallingConvention = CallingConvention.Cdecl)]
        public static extern void hb_start(IntPtr hbHandle);


        /// Return Type: void
        ///param0: hb_handle_t*
        [DllImport("hb.dll", EntryPoint = "hb_pause", CallingConvention = CallingConvention.Cdecl)]
        public static extern void hb_pause(IntPtr hbHandle);


        /// Return Type: void
        ///param0: hb_handle_t*
        [DllImport("hb.dll", EntryPoint = "hb_resume", CallingConvention = CallingConvention.Cdecl)]
        public static extern void hb_resume(IntPtr hbHandle);


        /// Return Type: void
        ///param0: hb_handle_t*
        [DllImport("hb.dll", EntryPoint = "hb_stop", CallingConvention = CallingConvention.Cdecl)]
        public static extern void hb_stop(IntPtr hbHandle);


        /// Return Type: void
        ///param0: hb_handle_t**
        [DllImport("hb.dll", EntryPoint = "hb_close", CallingConvention = CallingConvention.Cdecl)]
        public static extern void hb_close(IntPtr hbHandle);

        [DllImport("hb.dll", EntryPoint = "hb_global_close", CallingConvention = CallingConvention.Cdecl)]
        public static extern void hb_global_close();

        //hb_list_t * hb_list_init();
        [DllImport("hb.dll", EntryPoint = "hb_list_init", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_list_init();

        //int         hb_list_count( const hb_list_t * );
        [DllImport("hb.dll", EntryPoint = "hb_list_count", CallingConvention = CallingConvention.Cdecl)]
        public static extern int hb_list_count(IntPtr listPtr);

        //void        hb_list_add( hb_list_t *, void * );
        [DllImport("hb.dll", EntryPoint = "hb_list_add", CallingConvention = CallingConvention.Cdecl)]
        public static extern void hb_list_add(IntPtr listPtr, IntPtr item);

        //void        hb_list_insert( hb_list_t * l, int pos, void * p );
        [DllImport("hb.dll", EntryPoint = "hb_list_insert", CallingConvention = CallingConvention.Cdecl)]
        public static extern void hb_list_insert(IntPtr listPtr, int pos, IntPtr item);

        //void        hb_list_rem( hb_list_t *, void * );
        [DllImport("hb.dll", EntryPoint = "hb_list_rem", CallingConvention = CallingConvention.Cdecl)]
        public static extern void hb_list_rem(IntPtr listPtr, IntPtr item);

        //void      * hb_list_item( const hb_list_t *, int );
        [DllImport("hb.dll", EntryPoint = "hb_list_item", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_list_item(IntPtr listPtr, int itemIndex);

        //void        hb_list_close( hb_list_t ** );
        [DllImport("hb.dll", EntryPoint = "hb_list_close", CallingConvention = CallingConvention.Cdecl)]
        public static extern void hb_list_close(IntPtr listPtrPtr);

        [DllImport("hb.dll", EntryPoint = "hb_subtitle_can_force", CallingConvention = CallingConvention.Cdecl)]
        public static extern int hb_subtitle_can_force(int source);

        [DllImport("hb.dll", EntryPoint = "hb_subtitle_can_burn", CallingConvention = CallingConvention.Cdecl)]
        public static extern int hb_subtitle_can_burn(int source);

        [DllImport("hb.dll", EntryPoint = "hb_subtitle_can_pass", CallingConvention = CallingConvention.Cdecl)]
        public static extern int hb_subtitle_can_pass(int source, int mux);


        // int hb_video_framerate_get_from_name(const char *name)
        [DllImport("hb.dll", EntryPoint = "hb_video_framerate_get_from_name", CallingConvention = CallingConvention.Cdecl)]
        public static extern int hb_video_framerate_get_from_name(IntPtr name);

//const char*      hb_video_framerate_get_name(int framerate);
//const char*      hb_video_framerate_sanitize_name(const char *name);

        // returns hb_rate_s
        [DllImport("hb.dll", EntryPoint = "hb_video_framerate_get_next", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_video_framerate_get_next(IntPtr last);


//int              hb_audio_samplerate_get_best(uint32_t codec, int samplerate, int *sr_shift);
//int              hb_audio_samplerate_get_from_name(const char *name);
//const char*      hb_audio_samplerate_get_name(int samplerate);

        // returns hb_rate_s
        [DllImport("hb.dll", EntryPoint = "hb_audio_samplerate_get_next", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_audio_samplerate_get_next(IntPtr last);


        [DllImport("hb.dll", EntryPoint = "hb_audio_bitrate_get_best", CallingConvention = CallingConvention.Cdecl)]
        public static extern int hb_audio_bitrate_get_best(uint codec, int bitrate, int samplerate, int mixdown);

        [DllImport("hb.dll", EntryPoint = "hb_audio_bitrate_get_default", CallingConvention = CallingConvention.Cdecl)]
        public static extern int hb_audio_bitrate_get_default(uint codec, int samplerate, int mixdown);

        [DllImport("hb.dll", EntryPoint = "hb_audio_bitrate_get_limits", CallingConvention = CallingConvention.Cdecl)]
        public static extern int hb_audio_bitrate_get_limits(uint codec, int samplerate, int mixdown, ref int low, ref int high);

        [DllImport("hb.dll", EntryPoint = "hb_audio_bitrate_get_next", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_audio_bitrate_get_next(IntPtr last);

        [DllImport("hb.dll", EntryPoint = "hb_video_quality_get_limits", CallingConvention = CallingConvention.Cdecl)]
        public static extern void hb_video_quality_get_limits(uint codec, ref float low, ref float high, ref float granularity, ref int direction);

        [DllImport("hb.dll", EntryPoint = "hb_video_quality_get_name", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_video_quality_get_name(uint codec);

        [DllImport("hb.dll", EntryPoint = "hb_audio_quality_get_limits", CallingConvention = CallingConvention.Cdecl)]
        public static extern void hb_audio_quality_get_limits(uint codec, ref float low, ref float high, ref float granularity, ref int direction);

//float hb_audio_quality_get_best(uint32_t codec, float quality);

        [DllImport("hb.dll", EntryPoint = "hb_audio_quality_get_default", CallingConvention = CallingConvention.Cdecl)]
        public static extern float hb_audio_quality_get_default(uint codec);


        [DllImport("hb.dll", EntryPoint = "hb_audio_compression_get_limits", CallingConvention = CallingConvention.Cdecl)]
        public static extern void hb_audio_compression_get_limits(uint codec, ref float low, ref float high, ref float granularity, ref int direction);

//float hb_audio_compression_get_best(uint32_t codec, float compression);

        [DllImport("hb.dll", EntryPoint = "hb_audio_compression_get_default", CallingConvention = CallingConvention.Cdecl)]
        public static extern float hb_audio_compression_get_default(uint codec);


//int                hb_audio_dither_get_default();
//int                hb_audio_dither_get_default_method(); // default method, if enabled && supported
//int                hb_audio_dither_is_supported(uint32_t codec);
//int                hb_audio_dither_get_from_name(const char *name);
//const char*        hb_audio_dither_get_description(int method);
//const hb_dither_t* hb_audio_dither_get_next(const hb_dither_t *last);

        // hb_audio_can_apply_drc2(hb_handle_t *h, int title_idx, int audio_idx, int encoder)
        [DllImport("hb.dll", EntryPoint = "hb_audio_can_apply_drc2", CallingConvention = CallingConvention.Cdecl)]
        public static extern int hb_audio_can_apply_drc2(IntPtr handle, int title_index, int audio_index, int encoder);

        [DllImport("hb.dll", EntryPoint = "hb_mixdown_is_supported", CallingConvention = CallingConvention.Cdecl)]
        public static extern int hb_mixdown_is_supported(int mixdown, uint codec, ulong layout);

        [DllImport("hb.dll", EntryPoint = "hb_mixdown_has_codec_support", CallingConvention = CallingConvention.Cdecl)]
        public static extern int hb_mixdown_has_codec_support(int mixdown, uint codec);

        [DllImport("hb.dll", EntryPoint = "hb_mixdown_has_remix_support", CallingConvention = CallingConvention.Cdecl)]
        public static extern int hb_mixdown_has_remix_support(int mixdown, ulong layout);

//int                 hb_mixdown_get_discrete_channel_count(int mixdown);
//int                 hb_mixdown_get_low_freq_channel_count(int mixdown);

        [DllImport("hb.dll", EntryPoint = "hb_mixdown_get_best", CallingConvention = CallingConvention.Cdecl)]
        public static extern int hb_mixdown_get_best(uint codec, ulong layout, int mixdown);

        [DllImport("hb.dll", EntryPoint = "hb_mixdown_get_default", CallingConvention = CallingConvention.Cdecl)]
        public static extern int hb_mixdown_get_default(uint codec, ulong layout);

//int                 hb_mixdown_get_from_name(const char *name);
//const char*         hb_mixdown_get_name(int mixdown);
//const char*         hb_mixdown_get_short_name(int mixdown);
//const char*         hb_mixdown_sanitize_name(const char *name);

        [DllImport("hb.dll", EntryPoint = "hb_mixdown_get_next", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_mixdown_get_next(IntPtr last);

//int                 hb_video_encoder_get_default(int muxer);
//int                 hb_video_encoder_get_from_name(const char *name);
//const char*         hb_video_encoder_get_name(int encoder);
//const char*         hb_video_encoder_get_short_name(int encoder);
//const char*         hb_video_encoder_get_long_name(int encoder);
//const char*         hb_video_encoder_sanitize_name(const char *name);

        [DllImport("hb.dll", EntryPoint = "hb_video_encoder_get_next", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_video_encoder_get_next(IntPtr last);

/*
 * hb_audio_encoder_get_fallback_for_passthru() will sanitize a passthru codec
 * to the matching audio encoder (if any is available).
 *
 * hb_audio_encoder_get_from_name(), hb_audio_encoder_sanitize_name() will
 * sanitize legacy encoder names, but won't convert passthru to an encoder.
 */
//int                 hb_audio_encoder_get_fallback_for_passthru(int passthru);
//int                 hb_audio_encoder_get_default(int muxer);
//int                 hb_audio_encoder_get_from_name(const char *name);
//const char*         hb_audio_encoder_get_name(int encoder);
//const char*         hb_audio_encoder_get_short_name(int encoder);
//const char*         hb_audio_encoder_get_long_name(int encoder);
//const char*         hb_audio_encoder_sanitize_name(const char *name);

        [DllImport("hb.dll", EntryPoint = "hb_audio_encoder_get_next", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_audio_encoder_get_next(IntPtr last);

//int                   hb_container_get_from_name(const char *name);
//int                   hb_container_get_from_extension(const char *extension); // not really a container name
//const char*           hb_container_get_name(int format);
//const char*           hb_container_get_short_name(int format);
//const char*           hb_container_get_long_name(int format);
//const char*           hb_container_get_default_extension(int format);
//const char*           hb_container_sanitize_name(const char *name);

        [DllImport("hb.dll", EntryPoint = "hb_container_get_from_name", CallingConvention = CallingConvention.Cdecl)]
        public static extern int hb_container_get_from_name([In] [MarshalAs(UnmanagedType.LPStr)] string name);

        [DllImport("hb.dll", EntryPoint = "hb_container_get_next", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_container_get_next(IntPtr last);

        [DllImport("hb.dll", EntryPoint = "hb_video_encoder_get_presets", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_video_encoder_get_presets(int encoder);

        [DllImport("hb.dll", EntryPoint = "hb_video_encoder_get_tunes", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_video_encoder_get_tunes(int encoder);

        [DllImport("hb.dll", EntryPoint = "hb_video_encoder_get_profiles", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_video_encoder_get_profiles(int encoder);

        [DllImport("hb.dll", EntryPoint = "hb_video_encoder_get_levels", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_video_encoder_get_levels(int encoder);


        [DllImport("hb.dll", EntryPoint = "lang_get_next", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr lang_get_next(IntPtr last);

        [DllImport("hb.dll", EntryPoint = "lang_for_code2", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr lang_for_code2([In] [MarshalAs(UnmanagedType.LPStr)] string code2);


        ///hb_title_set_t  * hb_get_title_set( hb_handle_t * );
        [DllImport("hb.dll", EntryPoint = "hb_get_title_set", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_get_title_set(IntPtr hbHandle);

        ///hb_job_t * hb_job_init_by_index( hb_handle_t *h, int title_index );
        [DllImport("hb.dll", EntryPoint = "hb_job_init_by_index", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_job_init_by_index(IntPtr hbHandle, int title_index);

        ///void hb_job_close( hb_job_t ** job );
        [DllImport("hb.dll", EntryPoint = "hb_job_close", CallingConvention = CallingConvention.Cdecl)]
        public static extern void hb_job_close(IntPtr job);

        ///void hb_chapter_set_title(hb_chapter_t *chapter, const char *title);
        [DllImport("hb.dll", EntryPoint = "hb_chapter_set_title", CallingConvention = CallingConvention.Cdecl)]
        public static extern void hb_chapter_set_title(IntPtr chapter, [In] [MarshalAs(UnmanagedType.LPStr)] string title);

        ///void hb_chapter_set_title(hb_chapter_t *chapter, const char *title);
        [DllImport("hb.dll", EntryPoint = "hb_chapter_set_title", CallingConvention = CallingConvention.Cdecl)]
        public static extern void hb_chapter_set_title__ptr(IntPtr chapter, IntPtr title);

        /// hb_filter_object_t * hb_filter_init( int filter_id );
        [DllImport("hb.dll", EntryPoint = "hb_filter_init", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_filter_init(int filter_id);

        [DllImport("hb.dll", EntryPoint = "hb_generate_filter_settings_json", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_generate_filter_settings_json(
            int filter_id,
            [In] [MarshalAs(UnmanagedType.LPStr)] string preset,
            [In] [MarshalAs(UnmanagedType.LPStr)] string tune,
            [In] [MarshalAs(UnmanagedType.LPStr)] string custom);

        /// char* hb_filter_get_presets_json(int filter_id);
        [DllImport("hb.dll", EntryPoint = "hb_filter_get_presets_json", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_filter_get_presets_json(int filter_id);

        /// char* hb_filter_get_tuness_json(int filter_id);
        [DllImport("hb.dll", EntryPoint = "hb_filter_get_tunes_json", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_filter_get_tunes_json(int filter_id);

        [DllImport("hb.dll", EntryPoint = "hb_x264_encopt_name", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_x264_encopt_name(IntPtr name);

        [DllImport("hb.dll", EntryPoint = "hb_check_h264_level", CallingConvention = CallingConvention.Cdecl)]
        public static extern int hb_check_h264_level([In] [MarshalAs(UnmanagedType.LPStr)] string level, int width, int height, int fps_num, int fps_den, int interlaced, int fake_interlaced);

        [DllImport("hb.dll", EntryPoint = "hb_x264_param_unparse", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_x264_param_unparse(
            int bit_depth,
            [In] [MarshalAs(UnmanagedType.LPStr)] string x264_preset,
            [In] [MarshalAs(UnmanagedType.LPStr)] string x264_tune,
            [In] [MarshalAs(UnmanagedType.LPStr)] string x264_encopts,
            [In] [MarshalAs(UnmanagedType.LPStr)] string x264_profile,
            [In] [MarshalAs(UnmanagedType.LPStr)] string h264_level,
            int width,
            int height);


        [DllImport("hb.dll", EntryPoint = "hb_get_opencl_env", CallingConvention = CallingConvention.Cdecl)]
        public static extern int hb_get_opencl_env();

        [DllImport("hb.dll", EntryPoint = "hb_qsv_available", CallingConvention = CallingConvention.Cdecl)]
        public static extern int hb_qsv_available();
        
        [DllImport("hb.dll", EntryPoint = "hb_qsv_info_init", CallingConvention = CallingConvention.Cdecl)]
        public static extern int hb_qsv_info_init();

        // hb_image_t* hb_get_preview2(hb_handle_t* h, int title_idx, int picture, hb_geometry_settings_t* geo, int deinterlace);
        [DllImport("hb.dll", EntryPoint = "hb_get_preview2", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_get_preview2(IntPtr hbHandle, int title_idx, int preview_idx,  ref hb_geometry_settings_s geo, int deinterlace);

        // void hb_image_close(hb_image_t **_image);
        [DllImport("hb.dll", EntryPoint = "hb_image_close", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_image_close(IntPtr image);

        /* JSON API */

        // char     * hb_get_title_set_json(hb_handle_t * h);
        [DllImport("hb.dll", EntryPoint = "hb_get_title_set_json", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_get_title_set_json(IntPtr hbHandle);

        // char     * hb_job_init_json(hb_handle_t *h, int title_index);
        [DllImport("hb.dll", EntryPoint = "hb_job_init_json", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_job_init_json(IntPtr hbHandle, int title_index);

        // hb_job_t * hb_json_to_job(hb_handle_t * h, const char * json_job);
        [DllImport("hb.dll", EntryPoint = "hb_json_to_job", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_json_to_job(IntPtr hbHandle, IntPtr json_job);

        // int           hb_add_json( hb_handle_t *, const char * ) 
        [DllImport("hb.dll", EntryPoint = "hb_add_json", CallingConvention = CallingConvention.Cdecl)]
        public static extern int hb_add_json(IntPtr hbHandle, IntPtr json_job);

        //char     * hb_set_anamorphic_size_json(const char * json_param);
        [DllImport("hb.dll", EntryPoint = "hb_set_anamorphic_size_json", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_set_anamorphic_size_json(IntPtr json_param);

        // char     * hb_get_state_json(hb_handle_t * h);
        [DllImport("hb.dll", EntryPoint = "hb_get_state_json", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_get_state_json(IntPtr hbHandle);

        // char* hb_get_preview_params_json(int title_idx, int preview_idx, int deinterlace, hb_geometry_settings_t *settings)
        [DllImport("hb.dll", EntryPoint = "hb_get_preview_params_json", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_get_preview_params_json(int title_idx, int preview_idx, int deinterlace, ref hb_geometry_settings_s settings);
        
        //void         hb_presets_builtin_init(void);
        [DllImport("hb.dll", EntryPoint = "hb_presets_builtin_init", CallingConvention = CallingConvention.Cdecl)]
        public static extern void hb_presets_builtin_init();

        // char       * hb_presets_builtin_get_json(void); // Get list of HandBrake builtin presets as json string
        [DllImport("hb.dll", EntryPoint = "hb_presets_builtin_get_json", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_presets_builtin_get_json();

        // 	char       * hb_presets_read_file_json(const char *filename);
        [DllImport("hb.dll", EntryPoint = "hb_presets_read_file_json", CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr hb_presets_read_file_json(IntPtr filename);
    }
}