/* libbrotlienc Vala bindings
 * 
 * Bindings for the Brotli compression library (encoder only)
 * Based on brotli encode.h and types.h
 */

[CCode (cprefix = "BROTLI_", lower_case_cprefix = "brotli_", cheader_filename = "brotli/encode.h,brotli/types.h")]
namespace Brotli {

    /* Boolean type */
    [CCode (cname = "BROTLI_BOOL", has_type_id = false, default_value = "BROTLI_FALSE")]
    public struct Bool : int {
    }
    
    [CCode (cname = "BROTLI_TRUE")]
    public const Bool TRUE;
    [CCode (cname = "BROTLI_FALSE")]
    public const Bool FALSE;
    
    [CCode (cname = "TO_BROTLI_BOOL")]
    public Bool to_bool(int x);

    /* Memory allocation callbacks */
    [CCode (cname = "brotli_alloc_func", has_target = false)]
    public delegate void* AllocFunc(void* opaque, size_t size);
    
    [CCode (cname = "brotli_free_func", has_target = false)]
    public delegate void FreeFunc(void* opaque, void* address);

    /* Constants from encode.h */
    [CCode (cname = "BROTLI_MIN_WINDOW_BITS")]
    public const int MIN_WINDOW_BITS;
    [CCode (cname = "BROTLI_MAX_WINDOW_BITS")]
    public const int MAX_WINDOW_BITS;
    [CCode (cname = "BROTLI_LARGE_MAX_WINDOW_BITS")]
    public const int LARGE_MAX_WINDOW_BITS;
    [CCode (cname = "BROTLI_MIN_INPUT_BLOCK_BITS")]
    public const int MIN_INPUT_BLOCK_BITS;
    [CCode (cname = "BROTLI_MAX_INPUT_BLOCK_BITS")]
    public const int MAX_INPUT_BLOCK_BITS;
    [CCode (cname = "BROTLI_MIN_QUALITY")]
    public const int MIN_QUALITY;
    [CCode (cname = "BROTLI_MAX_QUALITY")]
    public const int MAX_QUALITY;
    [CCode (cname = "BROTLI_DEFAULT_QUALITY")]
    public const int DEFAULT_QUALITY;
    [CCode (cname = "BROTLI_DEFAULT_WINDOW")]
    public const int DEFAULT_WINDOW;

    /* Encoder mode */
    [CCode (cname = "BrotliEncoderMode", has_type_id = false)]
    public enum EncoderMode {
        [CCode (cname = "BROTLI_MODE_GENERIC")]
        GENERIC,
        [CCode (cname = "BROTLI_MODE_TEXT")]
        TEXT,
        [CCode (cname = "BROTLI_MODE_FONT")]
        FONT
    }

    /* Encoder operation for streaming */
    [CCode (cname = "BrotliEncoderOperation", has_type_id = false)]
    public enum EncoderOperation {
        [CCode (cname = "BROTLI_OPERATION_PROCESS")]
        PROCESS,
        [CCode (cname = "BROTLI_OPERATION_FLUSH")]
        FLUSH,
        [CCode (cname = "BROTLI_OPERATION_FINISH")]
        FINISH,
        [CCode (cname = "BROTLI_OPERATION_EMIT_METADATA")]
        EMIT_METADATA
    }

    /* Encoder parameters */
    [CCode (cname = "BrotliEncoderParameter", has_type_id = false)]
    public enum EncoderParameter {
        [CCode (cname = "BROTLI_PARAM_MODE")]
        MODE,
        [CCode (cname = "BROTLI_PARAM_QUALITY")]
        QUALITY,
        [CCode (cname = "BROTLI_PARAM_LGWIN")]
        LGWIN,
        [CCode (cname = "BROTLI_PARAM_LGBLOCK")]
        LGBLOCK,
        [CCode (cname = "BROTLI_PARAM_DISABLE_LITERAL_CONTEXT_MODELING")]
        DISABLE_LITERAL_CONTEXT_MODELING,
        [CCode (cname = "BROTLI_PARAM_SIZE_HINT")]
        SIZE_HINT,
        [CCode (cname = "BROTLI_PARAM_LARGE_WINDOW")]
        LARGE_WINDOW,
        [CCode (cname = "BROTLI_PARAM_NPOSTFIX")]
        NPOSTFIX,
        [CCode (cname = "BROTLI_PARAM_NDIRECT")]
        NDIRECT,
        [CCode (cname = "BROTLI_PARAM_STREAM_OFFSET")]
        STREAM_OFFSET
    }

    /* Encoder state - opaque structure */
    [CCode (cname = "BrotliEncoderState", free_function = "BrotliEncoderDestroyInstance")]
    [Compact]
    public class EncoderState {
        [CCode (cname = "BrotliEncoderCreateInstance")]
        public EncoderState(AllocFunc? alloc_func, FreeFunc? free_func, void* opaque);
        
        [CCode (cname = "BrotliEncoderSetParameter")]
        public Bool set_parameter(EncoderParameter param, uint32 value);
        
        [CCode (cname = "BrotliEncoderCompressStream")]
        public Bool compress_stream(EncoderOperation op, ref size_t available_in, 
            ref uint8* next_in, ref size_t available_out, ref uint8* next_out, 
            out size_t total_out);
        
        [CCode (cname = "BrotliEncoderIsFinished")]
        public Bool is_finished();
        
        [CCode (cname = "BrotliEncoderHasMoreOutput")]
        public Bool has_more_output();
        
        [CCode (cname = "BrotliEncoderTakeOutput")]
        public unowned uint8* take_output(ref size_t size);
    }

    /* Encoder one-shot functions */
    [CCode (cname = "BrotliEncoderMaxCompressedSize")]
    public size_t encoder_max_compressed_size(size_t input_size);
    
    [CCode (cname = "BrotliEncoderCompress")]
    public Bool encoder_compress(int quality, int lgwin, EncoderMode mode, 
        size_t input_size, uint8* input_buffer, 
        ref size_t encoded_size, uint8* encoded_buffer);
    
    [CCode (cname = "BrotliEncoderVersion")]
    public uint32 encoder_version();
}