path: root/spice.proto

/* built in types:
   int8, uint8, 16, 32, 64
*/

typedef fixed28_4 int32 @ctype(SPICE_FIXED28_4);

/* IDs of the video stream messages.
 * These IDs are in the interval [0, SPICE_MAX_NUM_STREAMS)
 */
typedef stream_id_t uint32;

struct Point {
    int32 x;
    int32 y;
};

struct Point16 {
    int16 x;
    int16 y;
};

struct PointFix {
    fixed28_4 x;
    fixed28_4 y;
};

struct Rect {
    int32 top;
    int32 left;
    int32 bottom;
    int32 right;
};

struct Transform {
    uint32 t00;
    uint32 t01;
    uint32 t02;
    uint32 t10;
    uint32 t11;
    uint32 t12;
};

enum32 link_err {
    OK,
    ERROR,
    INVALID_MAGIC,
    INVALID_DATA,
    VERSION_MISMATCH,
    NEED_SECURED,
    NEED_UNSECURED,
    PERMISSION_DENIED,
    BAD_CONNECTION_ID,
    CHANNEL_NOT_AVAILABLE
};

enum32 warn_code {
    WARN_GENERAL
} @prefix(SPICE_);

enum32 info_code {
    INFO_GENERAL
} @prefix(SPICE_);

flags32 migrate_flags {
    NEED_FLUSH,
    NEED_DATA_TRANSFER
} @prefix(SPICE_MIGRATE_);

flags32 composite_flags {
    OP0, OP1, OP2, OP3, OP4, OP5, OP6, OP7,
    SRC_FILTER0, SRC_FILTER1, SRC_FILTER2,
    MASK_FILTER0, MASK_FITLER1, MASK_FILTER2,

    SRC_REPEAT0, SRC_REPEAT1,
    MASK_REPEAT0, MASK_REPEAT1,
    COMPONENT_ALPHA,

    HAS_MASK,
    HAS_SRC_TRANSFORM,
    HAS_MASK_TRANSFORM,

    /* These are used to override the formats given in the images. For
     * example, if the mask image has format a8r8g8b8, but MASK_OPAQUE
     * is set, the image should be treated as if it were x8r8g8b8
     */
    SOURCE_OPAQUE,
    MASK_OPAQUE,
    DEST_OPAQUE,
} @prefix(SPICE_COMPOSITE_);

enum32 notify_severity {
    INFO,
    WARN,
    ERROR,
};

enum32 notify_visibility {
    LOW,
    MEDIUM,
    HIGH,
};

flags16 mouse_mode {
    SERVER,
    CLIENT,
};

message Empty {
} @declare;

message Data {
    uint8 data[] @end;
} @nocopy @declare;

enum8 data_compression_type {
    NONE,
    LZ4,
};

struct EmptyStructure {
};

message CompressedData {
    data_compression_type type;
    switch (type) {
    /* we cannot use !NONE (works only with flags) */
    case NONE:
        /* due to the way cases are defined after NONE we must have something */
        /* due to a bug we cannot use @virtual to write 0 to compressed_size */
        EmptyStructure empty;
    default:
        uint32 uncompressed_size;
    } u @anon;
    uint8 compressed_data[] @as_ptr(compressed_size);
} @ctype(SpiceMsgCompressedData);

struct ChannelWait {
    uint8 channel_type;
    uint8 channel_id;
    uint64 message_serial;
} @ctype(SpiceWaitForChannel) @declare;

channel BaseChannel {
 server:
    message {
        migrate_flags flags;
    } @declare migrate;

    Data migrate_data;

    message {
        uint32 generation;
        uint32 window;
    } @declare set_ack;

    message {
        uint32 id;
        uint64 timestamp;
        uint8 data[] @as_ptr(data_len);
    } @declare ping;

    message {
        uint8 wait_count;
        ChannelWait wait_list[wait_count] @end;
    } @declare wait_for_channels;

    message {
        uint64 time_stamp;
        link_err reason;
    } @ctype(SpiceMsgDisconnect) @declare disconnecting;

    message {
        uint64 time_stamp;
        notify_severity severity;
        notify_visibility visibilty;
        uint32 what; /* error_code/warn_code/info_code */
        uint32 message_len;
        uint8 message[message_len] @end @nomarshal;
    } @declare notify;

    Data list; /* the msg body is SpiceSubMessageList */

    Empty base_last = 100;

 client:
    message {
        uint32 generation;
    } @declare ack_sync;

    Empty ack;

    message {
        uint32 id;
        uint64 timestamp;
    } @ctype(SpiceMsgPing) pong;

    Empty migrate_flush_mark;

    Data migrate_data;

    message {
        uint64 time_stamp;
        link_err reason;
    } @ctype(SpiceMsgDisconnect) disconnecting;
};

struct ChannelId {
    uint8 type;
    uint8 id;
} @declare;

struct DstInfo {
    uint16 port;
    uint16 sport;
    uint32 host_size;
    uint8 *host_data[host_size] @zero_terminated @marshall @nonnull;
    uint32 cert_subject_size;
    uint8 *cert_subject_data[cert_subject_size] @zero_terminated @marshall;
} @ctype(SpiceMigrationDstInfo) @declare;

channel MainChannel : BaseChannel {
 server:
    message {
        DstInfo dst_info;
    } @ctype(SpiceMsgMainMigrationBegin) @declare migrate_begin = 101;

    Empty migrate_cancel;

    message {
        uint32 session_id;
        uint32 display_channels_hint;
        uint32 supported_mouse_modes;
        uint32 current_mouse_mode;
        uint32 agent_connected;
        uint32 agent_tokens;
        uint32 multi_media_time;
        uint32 ram_hint;
    } @declare init;

    message {
        uint32 num_of_channels;
        ChannelId channels[num_of_channels] @end;
    } @ctype(SpiceMsgChannels) @declare channels_list;

    message {
        mouse_mode supported_modes;
        mouse_mode current_mode @unique_flag;
    } @declare mouse_mode;

    message {
        uint32 time;
    } @ctype(SpiceMsgMainMultiMediaTime) @declare multi_media_time;

    Empty agent_connected;

    message {
        link_err error_code;
    } @ctype(SpiceMsgMainAgentDisconnect) @declare agent_disconnected;

    Data agent_data;

    message {
        uint32 num_tokens;
    } @ctype(SpiceMsgMainAgentTokens) @declare agent_token;

    message {
        uint16 port;
        uint16 sport;
        uint32 host_size;
        uint8 *host_data[host_size] @zero_terminated @marshall;
        uint32 cert_subject_size;
        uint8 *cert_subject_data[cert_subject_size] @zero_terminated  @marshall;
    } @ctype(SpiceMsgMainMigrationSwitchHost) @declare migrate_switch_host;

    Empty migrate_end;

    message {
       uint32 name_len;
       uint8 name[name_len] @end;
    } @declare name;

    message {
       uint8 uuid[16];
    } @declare uuid;

    message {
        uint32 num_tokens;
    } @declare agent_connected_tokens;

    message {
        DstInfo dst_info;
        uint32 src_mig_version;
    } @declare migrate_begin_seamless;

    Empty migrate_dst_seamless_ack;
    Empty migrate_dst_seamless_nack;

 client:
    message {
        uint64 cache_size;
    } @ctype(SpiceMsgcClientInfo) @declare client_info = 101;

    Empty migrate_connected;

    Empty migrate_connect_error;

    Empty attach_channels;

    message {
        mouse_mode mode;
    } @declare mouse_mode_request;

    message {
        uint32 num_tokens;
    } @ctype(SpiceMsgMainAgentTokens) @declare agent_start;

    Data agent_data;

    message {
        uint32 num_tokens;
    } @ctype(SpiceMsgMainAgentTokens) @declare agent_token;

    Empty migrate_end;

    message {
        uint32 src_version;
    } @declare migrate_dst_do_seamless;

    Empty migrate_connected_seamless;

    Data quality_indicator;
};

enum8 clip_type {
    NONE,
    RECTS
};

flags8 path_flags { /* TODO: C enum names changes */
    BEGIN = 0,
    END = 1,
    CLOSE = 3,
    BEZIER = 4,
} @prefix(SPICE_PATH_);

enum8 video_codec_type {
    MJPEG = 1,
    VP8,
    H264,
    VP9,
    H265,
};

flags8 stream_flags {
    TOP_DOWN = 0,
};

enum8 brush_type {
    NONE,
    SOLID,
    PATTERN,
};

flags8 mask_flags {
    INVERS,
};

enum8 image_type {
    BITMAP,
    QUIC,
    RESERVED,
    LZ_PLT = 100,
    LZ_RGB,
    GLZ_RGB,
    FROM_CACHE,
    SURFACE,
    JPEG,
    FROM_CACHE_LOSSLESS,
    ZLIB_GLZ_RGB,
    JPEG_ALPHA,
    LZ4,
};

enum8 image_compression {
    INVALID  = 0,
    OFF,
    AUTO_GLZ,
    AUTO_LZ,
    QUIC,
    GLZ,
    LZ,
    LZ4,
};

flags8 image_flags {
    CACHE_ME,
    HIGH_BITS_SET,
    CACHE_REPLACE_ME,
};

enum8 bitmap_fmt {
    INVALID,
    1BIT_LE,
    1BIT_BE,
    4BIT_LE,
    4BIT_BE,
    8BIT /* 8bit indexed mode */,
    16BIT, /* 0555 mode */
    24BIT /* 3 byte, brg */,
    32BIT /* 4 byte, xrgb in little endian format */,
    RGBA /* 4 byte, argb in little endian format */,
    8BIT_A /* 1 byte, alpha */
};

flags8 bitmap_flags {
    PAL_CACHE_ME,
    PAL_FROM_CACHE,
    TOP_DOWN,
};

flags8 jpeg_alpha_flags {
    TOP_DOWN,
};

enum8 image_scale_mode {
    INTERPOLATE,
    NEAREST,
};

flags16 ropd {
    INVERS_SRC,
    INVERS_BRUSH,
    INVERS_DEST,
    OP_PUT,
    OP_OR,
    OP_AND,
    OP_XOR,
    OP_BLACKNESS,
    OP_WHITENESS,
    OP_INVERS,
    INVERS_RES,
};

/* This *must* remain with values identical to api/winddi.h
   LA_STYLED == 0x8 (log_2)=> 3
   LA_STARTGAP == 0x4 (log_2)=> 2
   This is used by the windows driver.
 */
flags8 line_flags {
    STYLED = 3,
    START_WITH_GAP = 2,
};

flags8 string_flags {
    RASTER_A1,
    RASTER_A4,
    RASTER_A8,
    RASTER_TOP_DOWN,
};

flags32 surface_flags {
    /* Adding flags requires some caps check, since old clients only
       treat the value as an enum and not as a flag (flag == PRIMARY).
       Considering this was fixed by commit
       5b6e3d1c16457c926322ce28d341af2e8d39efb5 in Aug 21 2013 is safe
       to assume that if capabilities include SPICE_DISPLAY_CAP_MULTI_CODEC
       we can use any flags */
    PRIMARY,
    /* The surface will be streamed entirely. This means that only
       stream commands will be received and the stream will cover the
       entire surface. This flag can be safely ignored and is intended
       as an hint for the client */
    STREAMING_MODE,
};

enum32 surface_fmt {
    INVALID,
    1_A     = 1,
    8_A     = 8,
    16_555  = 16 ,
    16_565  = 80,
    32_xRGB = 32,
    32_ARGB = 96
};

flags8 alpha_flags {
    DEST_HAS_ALPHA,
    SRC_SURFACE_HAS_ALPHA
};

enum8 resource_type {
    INVALID,
    PIXMAP
} @prefix(SPICE_RES_TYPE_);

struct ClipRects {
    uint32 num_rects;
    Rect rects[num_rects] @end;
};

struct PathSegment {
    path_flags flags;
    uint32 count;
    PointFix points[count] @end;
}  @ctype(SpicePathSeg);

struct Path {
    uint32 num_segments;
    PathSegment segments[num_segments] @ptr_array;
};

struct Clip {
    clip_type type;
    switch (type) {
    case RECTS:
        ClipRects rects @outvar(cliprects) @to_ptr;
    } u @anon;
};

struct DisplayBase {
    uint32 surface_id;
    Rect box;
    Clip clip;
} @ctype(SpiceMsgDisplayBase) @declare;

struct ResourceID {
    uint8 type;  /* resource_type */
    uint64 id;
} @declare;

struct WaitForChannel {
    uint8 channel_type;
    uint8 channel_id;
    uint64 message_serial;
} @declare;

struct Palette {
    uint64 unique;
    uint16 num_ents;
    uint32 ents[num_ents] @end;
};

struct BitmapData {
    bitmap_fmt format;
    bitmap_flags flags;
    uint32 x;
    uint32 y;
    uint32 stride;
    switch (flags) {
    case PAL_FROM_CACHE:
        uint64 palette_id;
    default:
        Palette *palette @outvar(bitmap);
    } pal @anon;
    uint8 data[image_size(8, stride, y)] @chunk @nomarshal;
} @ctype(SpiceBitmap);

struct BinaryData {
    uint32 data_size;
    uint8 data[data_size] @nomarshal @chunk;
} @ctype(SpiceQUICData);

struct LZPLTData {
    bitmap_flags flags;
    uint32 data_size;
    switch (flags) {
    case PAL_FROM_CACHE:
        uint64 palette_id;
    default:
        Palette *palette @nonnull @outvar(lzplt);
    } pal @anon;
    uint8 data[data_size] @nomarshal @chunk;
};

struct ZlibGlzRGBData {
    uint32 glz_data_size;
    uint32 data_size;
    uint8 data[data_size] @nomarshal @chunk;
} @ctype(SpiceZlibGlzRGBData);

struct JPEGAlphaData {
    jpeg_alpha_flags flags;
    uint32 jpeg_size;
    uint32 data_size;
    uint8 data[data_size] @nomarshal @chunk;
} @ctype(SpiceJPEGAlphaData);

struct Surface {
    uint32 surface_id;
};


struct Image {
    struct ImageDescriptor {
        uint64 id;
        image_type type;
        image_flags flags;
        uint32 width;
        uint32 height;
    } descriptor;

    switch (descriptor.type) {
    case BITMAP:
        BitmapData bitmap;
    case QUIC:
        BinaryData quic;
    case LZ_RGB:
    case GLZ_RGB:
        BinaryData lz_rgb;
    case JPEG:
        BinaryData jpeg;
    case LZ4:
        BinaryData lz4;
    case LZ_PLT:
        LZPLTData lz_plt;
    case ZLIB_GLZ_RGB:
        ZlibGlzRGBData zlib_glz;
    case JPEG_ALPHA:
        JPEGAlphaData jpeg_alpha;
    case SURFACE:
        Surface surface;
    } u;
};

struct Pattern {
    Image *pat @nonnull;
    Point pos;
};

struct Brush {
    brush_type type;
    switch (type) {
    case SOLID:
        uint32 color;
    case PATTERN:
        Pattern pattern;
    } u;
};

struct QMask {
    mask_flags flags;
    Point pos;
    Image *bitmap;
};

struct LineAttr {
    line_flags flags;
    switch (flags) {
    case STYLED:
        uint8 style_nseg;
   } u1 @anon;
   switch (flags) {
   case STYLED:
        fixed28_4 *style[style_nseg];
   } u2 @anon;
};

struct RasterGlyphA1 {
    Point render_pos;
    Point glyph_origin;
    uint16 width;
    uint16 height;
    uint8 data[image_size(1, width, height)] @end;
} @ctype(SpiceRasterGlyph);

struct RasterGlyphA4 {
    Point render_pos;
    Point glyph_origin;
    uint16 width;
    uint16 height;
    uint8 data[image_size(4, width, height)] @end;
} @ctype(SpiceRasterGlyph);

struct RasterGlyphA8 {
    Point render_pos;
    Point glyph_origin;
    uint16 width;
    uint16 height;
    uint8 data[image_size(8, width, height)] @end;
} @ctype(SpiceRasterGlyph);

struct String {
    uint16 length;
    string_flags flags; /* Special: Only one of a1/a4/a8 set */
    switch (flags) {
    case RASTER_A1:
        RasterGlyphA1 glyphs[length] @ctype(SpiceRasterGlyph) @ptr_array;
    case RASTER_A4:
        RasterGlyphA4 glyphs[length] @ctype(SpiceRasterGlyph) @ptr_array;
    case RASTER_A8:
        RasterGlyphA8 glyphs[length] @ctype(SpiceRasterGlyph) @ptr_array;
    } u @anon;
};

struct StreamDataHeader {
    stream_id_t id;
    uint32 multi_media_time;
} @declare;

struct Head {
    uint32 monitor_id;
    uint32 surface_id;
    uint32 width;
    uint32 height;
    uint32 x;
    uint32 y;
    uint32 flags;
} @declare;

flags32 gl_scanout_flags {
    Y0TOP
};

channel DisplayChannel : BaseChannel {
 server:
    message {
        uint32 x_res;
        uint32 y_res;
        uint32 bits;
    } @declare mode = 101;

    Empty mark;
    Empty reset;
    message {
        DisplayBase base;
        Point src_pos;
    } @declare copy_bits;

    message {
        uint16 count;
        ResourceID resources[count] @end;
    } @ctype(SpiceResourceList) @declare inval_list;

    /* This message is used to invalidate the complete image cache
     * on the client.
     * Due to synchronization for GLZ images we must make sure
     * that messages related to cached images on other channels
     * are processed so we send a list of channels with respective
     * message serials to wait for.
     */
    message {
        uint8 wait_count;
        WaitForChannel wait_list[wait_count] @end;
    } @ctype(SpiceMsgWaitForChannels) @declare inval_all_pixmaps;

    message {
        uint64 id;
    } @ctype(SpiceMsgDisplayInvalOne) @declare inval_palette;

    Empty inval_all_palettes;

    message {
        uint32 surface_id;
        stream_id_t id;
        stream_flags flags;
        video_codec_type codec_type;
        uint64 stamp;
        uint32 stream_width;
        uint32 stream_height;
        uint32 src_width;
        uint32 src_height;
        Rect dest;
        Clip clip;
    } @declare stream_create = 122;

    message {
        StreamDataHeader base;
        uint32 data_size;
        uint8 data[data_size] @end @nomarshal;
    } @declare stream_data;

    message {
        stream_id_t id;
        Clip clip;
    } @declare stream_clip;

    message {
        stream_id_t id;
    } @declare stream_destroy;

    Empty stream_destroy_all;

    message {
        DisplayBase base;
        struct Fill {
            Brush brush @outvar(brush);
            ropd rop_descriptor;
            QMask mask @outvar(mask);
        } data;
    } @declare draw_fill = 302;

    message {
        DisplayBase base;
        struct Opaque {
            Image *src_bitmap;
            Rect src_area;
            Brush brush;
            ropd rop_descriptor;
            image_scale_mode scale_mode;
            QMask mask @outvar(mask);
        } data;
    } @declare draw_opaque;

    message {
        DisplayBase base;
        struct Copy {
            Image *src_bitmap;
            Rect src_area;
            ropd rop_descriptor;
            image_scale_mode scale_mode;
            QMask mask @outvar(mask);
        } data;
    } @declare draw_copy;

    message {
        DisplayBase base;
        struct Blend {
            Image *src_bitmap;
            Rect src_area;
            ropd rop_descriptor;
            image_scale_mode scale_mode;
            QMask mask @outvar(mask);
        } @ctype(SpiceCopy) data;
    } @ctype(SpiceMsgDisplayDrawCopy) draw_blend;

    message {
        DisplayBase base;
        struct Blackness {
            QMask mask @outvar(mask);
        } data;
    } @declare draw_blackness;

    message {
        DisplayBase base;
        struct Whiteness {
            QMask mask @outvar(mask);
        } data;
    } @declare draw_whiteness;

    message {
        DisplayBase base;
        struct Invers {
            QMask mask @outvar(mask);
        } data;
    } @declare draw_invers;

    message {
        DisplayBase base;
        struct Rop3 {
            Image *src_bitmap;
            Rect src_area;
            Brush brush;
            uint8 rop3;
            image_scale_mode scale_mode;
            QMask mask @outvar(mask);
        } data;
    } @declare draw_rop3;

    message {
        DisplayBase base;
        struct Stroke {
            Path *path @marshall @nonnull;
            LineAttr attr;
            Brush brush;
            uint16 fore_mode;
            uint16 back_mode;
        } data;
    } @declare draw_stroke;

    message {
        DisplayBase base;
        struct Text {
            String *str @marshall @nonnull;
            Rect back_area;
            Brush fore_brush @outvar(fore_brush);
            Brush back_brush @outvar(back_brush);
            uint16 fore_mode;
            uint16 back_mode;
        } data;
    } @declare draw_text;

    message {
        DisplayBase base;
        struct Transparent {
            Image *src_bitmap;
            Rect src_area;
            uint32 src_color;
            uint32 true_color;
        } data;
    } @declare draw_transparent;

    message {
        DisplayBase base;
        struct AlphaBlend {
            alpha_flags alpha_flags;
            uint8 alpha;
            Image *src_bitmap;
            Rect src_area;
        } data;
    } @declare draw_alpha_blend;

    message {
        uint32 surface_id;
        uint32 width;
        uint32 height;
        surface_fmt format;
        surface_flags flags;
    } @ctype(SpiceMsgSurfaceCreate) @declare surface_create;

    message {
        uint32 surface_id;
    } @ctype(SpiceMsgSurfaceDestroy) @declare surface_destroy;

    message {
        StreamDataHeader base;
        uint32 width;
        uint32 height;
        Rect dest;
        uint32 data_size;
        uint8 data[data_size] @end @nomarshal;
    } @declare stream_data_sized;

    message {
        uint16 count;
        uint16 max_allowed;
        Head heads[count] @end;
    } @declare monitors_config;

    message {
        DisplayBase base;
        struct Composite {
            composite_flags flags;
            Image *src_bitmap;
            switch (flags) {
            case HAS_MASK:
                Image *mask_bitmap;
            } a @anon;
            switch (flags) {
            case HAS_SRC_TRANSFORM:
                Transform src_transform;
            } b @anon;
            switch (flags) {
            case HAS_MASK_TRANSFORM:
                Transform mask_transform;
            } c @anon;
            Point16 src_origin;
            Point16 mask_origin;
        } data;
    } @declare draw_composite;

    message {
        stream_id_t stream_id;
        uint32 unique_id;
        uint32 max_window_size;
        uint32 timeout_ms;
    } @declare stream_activate_report;

    message {
        unix_fd drm_dma_buf_fd;
        uint32 width;
        uint32 height;
        uint32 stride;
        /* specifies the format of drm_dma_buf_fd defined in drm_fourcc.h */
        uint32 drm_fourcc_format;
        gl_scanout_flags flags;
    } @declare gl_scanout_unix;

    message {
        uint32 x;
        uint32 y;
        uint32 w;
        uint32 h;
    } @declare gl_draw;

    Data quality_indicator;
 client:
    message {
        uint8 pixmap_cache_id;
        int64 pixmap_cache_size; //in pixels
        uint8 glz_dictionary_id;
        int32 glz_dictionary_window_size;  // in pixels
    } @declare init = 101;

    message {
        stream_id_t stream_id;
        uint32 unique_id;
        // the mm_time of the first frame included in the report
        uint32 start_frame_mm_time;
        // the mm_time of the last frame included in the report
        uint32 end_frame_mm_time;
        // the number of frames that reached the client during the time the
        // report is referring to
        // A special case is when num_frames == 0 and num_drops ==
        // 0xffffffffu, this is used in the client to communicate that
        // the stream is not supported or that the client was not able
        // to decode it
        uint32 num_frames;
        // the part of the above frames that were dropped by the client due
        // to late arrival time
        uint32 num_drops;
        // end_frame_mm_time - client_mm_time
        int32 last_frame_delay;
        // the latency of the audio playback
        // If there is no audio playback, set it to 0xffffffffu
        uint32 audio_delay;
    } @declare stream_report;

    message {
        image_compression image_compression;
    } @declare preferred_compression;

    message {
    } @declare gl_draw_done;

    message {
        uint8 num_of_codecs;
        video_codec_type codecs[num_of_codecs] @end;
    } @declare preferred_video_codec_type;
};

flags16 keyboard_modifier_flags {
    SCROLL_LOCK,
    NUM_LOCK,
    CAPS_LOCK
};

enum8 mouse_button {
    INVALID,
    LEFT,
    MIDDLE,
    RIGHT,
    UP,
    DOWN,
    SIDE,
    EXTRA,
};

flags16 mouse_button_mask {
    LEFT,
    MIDDLE,
    RIGHT,
    UP,
    DOWN,
    SIDE,
    EXTRA,
};

channel InputsChannel : BaseChannel {
 client:
    message {
        uint32 code;
    } @ctype(SpiceMsgcKeyDown) @declare key_down = 101;

    message {
        uint32 code;
    } @ctype(SpiceMsgcKeyUp) @declare key_up;

    message {
        keyboard_modifier_flags modifiers;
    } @ctype(SpiceMsgcKeyModifiers) @declare key_modifiers;

    Data key_scancode;

    message {
        int32 dx;
        int32 dy;
        mouse_button_mask buttons_state;
    } @ctype(SpiceMsgcMouseMotion) @declare mouse_motion = 111;

    message {
        uint32 x;
        uint32 y;
        mouse_button_mask buttons_state;
        uint8 display_id;
    } @ctype(SpiceMsgcMousePosition) @declare mouse_position;

    message {
        mouse_button button;
        mouse_button_mask buttons_state;
    } @ctype(SpiceMsgcMousePress) @declare mouse_press;

    message {
        mouse_button button;
        mouse_button_mask buttons_state;
    } @ctype(SpiceMsgcMouseRelease) @declare mouse_release;

 server:
    message {
        keyboard_modifier_flags keyboard_modifiers;
    } @declare init = 101;

    message {
        keyboard_modifier_flags modifiers;
    } @declare key_modifiers;

    Empty mouse_motion_ack = 111;
};

enum8 cursor_type {
    ALPHA,
    MONO,
    COLOR4,
    COLOR8,
    COLOR16,
    COLOR24,
    COLOR32,
};

flags16 cursor_flags {
    NONE, /* Means no cursor */
    CACHE_ME,
    FROM_CACHE,
};

struct CursorHeader {
    uint64 unique;
    cursor_type type;
    uint16 width;
    uint16 height;
    uint16 hot_spot_x;
    uint16 hot_spot_y;
};

struct Cursor {
    cursor_flags flags;
    switch (flags) {
    case !NONE:
        CursorHeader header;
    } u @anon;
    uint8 data[] @as_ptr(data_size);
} @declare;

channel CursorChannel : BaseChannel {
 server:
    message {
        Point16 position;
        uint16 trail_length;
        uint16 trail_frequency;
        uint8 visible;
        Cursor cursor;
    } @declare init = 101;

    Empty reset;

    message {
        Point16 position;
        uint8 visible;
        Cursor cursor;
    } @declare set;

    message {
        Point16 position;
    } @declare move;

    Empty hide;

    message {
        uint16 length;
        uint16 frequency;
    } @declare trail;

    message {
        uint64 id;
    } @ctype(SpiceMsgDisplayInvalOne) @declare inval_one;

    Empty inval_all;
};

enum16 audio_data_mode {
    INVALID,
    RAW,
    CELT_0_5_1 @deprecated,
    OPUS,
};

enum16 audio_fmt {
    INVALID,
    S16,
};

message AudioVolume {
    uint8 nchannels;
    uint16 volume[nchannels] @end;
} @declare;

message AudioMute {
    uint8 mute;
} @declare;

channel PlaybackChannel : BaseChannel {
 server:
    message {
        uint32 time;
        uint8 data[] @as_ptr(data_size);
    } @ctype(SpiceMsgPlaybackPacket) @declare data = 101;

    message {
        uint32 time;
        audio_data_mode mode;
        uint8 data[] @as_ptr(data_size);
    } @declare mode;

    message {
       uint32 channels;
       audio_fmt format;
       uint32 frequency;
       uint32 time;
    } @declare start;

    Empty stop;
    AudioVolume volume;
    AudioMute mute;

    message {
        uint32 latency_ms;
    } @declare latency;
};

channel RecordChannel : BaseChannel {
 server:
    message {
        uint32 channels;
        audio_fmt format;
        uint32 frequency;
    } @declare start = 101;

    Empty stop;
    AudioVolume volume;
    AudioMute mute;
 client:
    message {
        uint32 time;
        uint8 data[] @nomarshal @as_ptr(data_size);
    } @ctype(SpiceMsgPlaybackPacket) @declare data = 101;

    message {
        uint32 time;
        audio_data_mode mode;
        uint8 data[] @as_ptr(data_size);
    } @ctype(SpiceMsgPlaybackMode) @declare mode;

    message {
        uint32 time;
    } @declare start_mark;
};

channel TunnelChannel {
};

enum32 vsc_message_type {
    Init = 1,
    Error,
    ReaderAdd,
    ReaderRemove,
    ATR,
    CardRemove,
    APDU,
    Flush,
    FlushComplete
};

struct VscMessageHeader {
    vsc_message_type type;
    uint32 reader_id;
    uint32 length;
} @ctype(VSCMsgHeader);

struct VscMessageError {
    uint32 code;
} @ctype(VSCMsgError);

struct VscMessageAPDU {
    uint8 data[];
} @ctype(VSCMsgAPDU);

struct VscMessageATR {
    uint8 atr[];
} @ctype(VSCMsgATR);

struct VscMessageReaderAdd {
    int8 *name[] @zero_terminated @nonnull @end @nomarshal;
} @ctype(VSCMsgReaderAdd);

channel SmartcardChannel : BaseChannel {
 server:
    message {
        vsc_message_type type;
        uint32 reader_id;
        uint32 length;
        uint8 data[length] @end @nomarshal;
    } @ctype(SpiceMsgSmartcard) data = 101;

 client:
/* Some of the following messages are duplicated, the protocol
 * definition was broken. Messages, as you can see have same ID.
 * Also code was not used and didn't compile correctly.
 * Keeping in the hope could be useful in the future.
 */
/*
    message {
        VscMessageHeader header;
        switch (header.type) {
        case ReaderAdd:
            VscMessageReaderAdd add;
        case ATR:
        case APDU:
            VscMessageATR atr_data;
        case Error:
            VscMessageError error;
        } u @anon;
    } @ctype(SpiceMsgcSmartcard) old_data = 101;
*/
    message {
        vsc_message_type type;
        uint32 reader_id;
        uint32 length;
        uint8 data[length] @end @nomarshal;
    } @ctype(VSCMsgHeader) data = 101;
/* See comment on client data message above */
/*
    message {
        uint32 code;
    } @ctype(VSCMsgError) error = 101;

    message {
        uint8 data[];
    } @ctype(VSCMsgATR) atr = 101;

    message {
        int8 name[] @zero_terminated @nonnull;
    } @ctype(VSCMsgReaderAdd) reader_add = 101;
*/
} @ifdef(USE_SMARTCARD);

channel SpicevmcChannel : BaseChannel {
server:
    Data data = 101;
    CompressedData compressed_data = 102;
client:
    Data data = 101;
    CompressedData compressed_data = 102;
};

channel UsbredirChannel : SpicevmcChannel {
};

channel PortChannel : SpicevmcChannel {
 client:
    message {
        uint8 event;
    } @declare event = 201;
 server:
    message {
        uint32 name_size;
        uint8 *name[name_size] @zero_terminated @marshall @nonnull;
        uint8 opened;
    } @declare init = 201;
    message {
        uint8 event;
    } @declare event;
};

channel WebDAVChannel : PortChannel {
};

protocol Spice {
    MainChannel main = 1;
    DisplayChannel display;
    InputsChannel inputs;
    CursorChannel cursor;
    PlaybackChannel playback;
    RecordChannel record;
    TunnelChannel tunnel;
    SmartcardChannel smartcard;
    UsbredirChannel usbredir;
    PortChannel port;
    WebDAVChannel webdav;
};