video_decore.h

最新MTK手机软件源码

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/*******************************************************************************
 *
 * Filename:
 * ---------
 *   video_decore.h
 *
 * Project:
 * --------
 *   MAUI
 *
 * Description:
 * ------------
 *   Video decode core definitions
 *
 * Author:
 * -------
 * -------
 *
 *============================================================================
 *             HISTORY
 * Below this line, this part is controlled by PVCS VM. DO NOT MODIFY!!
 *------------------------------------------------------------------------------
 * removed!
 *
 * removed!
 * removed!
 * removed!
 *
 * removed!
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 * removed!
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 * removed!
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 *
 *------------------------------------------------------------------------------
 * Upper this line, this part is controlled by PVCS VM. DO NOT MODIFY!!
 *============================================================================
 ****************************************************************************/
#ifndef VIDEO_DECORE_H
#define VIDEO_DECORE_H

#if ( defined (MT6219) || defined (MT6226) || defined (MT6227) || defined (MT6226M) )

// Allow the maximum decoded frame width, this is software definition
#define DEC_MAX_FRAME_WIDTH            176
// Allow the maximum decoded frame height, this is software definition
#define DEC_MAX_FRAME_HEIGHT           144
// Allow the maximum decoded frame width, this is chip limitation
#define CHIP_DEC_MAX_FRAME_WIDTH       352
// Allow the maximum decoded frame height, this is chip limitation
#define CHIP_DEC_MAX_FRAME_HEIGHT      288
// Maximum working memory for Mpeg4 hardware engine.
#define DEC_MAX_WORK_MEMORY(_FRAME_WIDTH,_FRAME_HEIGHT)            (3*_FRAME_WIDTH*_FRAME_HEIGHT+2048+(((_FRAME_WIDTH*_FRAME_HEIGHT+255)/256)*32))
// Total HW buffer memory size
#define HW_BUFFER_REGISTER_SIZE        0x80

#else /* MT6228, MT6229, MT6230 */

// Allow the maximum decoded frame width, this is software definition
#define DEC_MAX_FRAME_WIDTH            352 
// Allow the maximum decoded frame height, this is software definition
#define DEC_MAX_FRAME_HEIGHT           288
// Allow the maximum decoded frame width, this is chip limitation
#define CHIP_DEC_MAX_FRAME_WIDTH       640
// Allow the maximum decoded frame height, this is chip limitation
#define CHIP_DEC_MAX_FRAME_HEIGHT      480
// Maximum working memory for Mpeg4 hardware engine.
#define DEC_MAX_WORK_MEMORY(_FRAME_WIDTH,_FRAME_HEIGHT)            (4096+(((_FRAME_WIDTH*_FRAME_HEIGHT+255)/256)*32)+328)
// Total HW buffer memory size
#define HW_BUFFER_REGISTER_SIZE        0x80

#endif

/* these information is obtained from bitstream parser */
typedef struct
{
    // Frame width
    kal_uint16 width;
    // Frame height
    kal_uint16 height;
    // This is an 8-bit integer used to signal the profile and level identification
    kal_uint8 version;
    // 0: intra coded(I), 01: predictive-coded (P)
    kal_uint8 vop_coding_type;
    // Used inverse quantisation type to inverse quantisation of the DCT coefficients.
    kal_uint8 quant_type;
    // '1' indicates that the macroblock data is rearranged differently, specifically, 
    // motion vector data is separated from the texture data (i.e., DCT coefficients)
    kal_uint8 data_partitioned;
    // '1' indicates that the reversible variable length tables 
    // (Table B?23, Table B?24 and Table B?25) should be used
    kal_uint8 resversible_vlc;
    // H.263 or not
    kal_uint8 H263;
    // H.263 or not
    kal_uint8 short_video_header;
    // vop_fcode_forward, values from 1 to 7; the value of zero is forbidden. 
    // It is used in decoding of motion vectors.
    kal_uint8 fcode;
    // Signals the value of the parameter rounding_control used for pixel 
    // value interpolation in motion compensation for P-VOPs. 
    kal_uint8 rounding_code;
    // Specify the absolute value of quantiser scale to be used for inverse quantising the
    // macroblock until updated by any subsequent dquant, dbquant, or quant_scale.
    kal_uint8 vop_quant;
    // The value of this internal flag is set to 1 when the values of intra_dc_thr 
    // and the DCT quantiser indicate the usage of the intra DC VLCs as shown in Table 6?21.
    // Otherwise, the value of this flag is set to 0.
    kal_uint8 intra_dc_vlc_thr;
    // vop_time_increment_resolution, indicates the number of evenly spaced subintervals, 
    // called ticks, within one modulo time. One modulo time represents the fixed interval 
    // of one second. The value zero is forbidden.
    kal_uint16 time_increment;
    // This value represents the absolute vop_time_increment from the 
    // synchronization point marked by the modulo_time_base measured 
    // in the number of clock ticks. It can take a value in the range
    // of [0,vop_time_increment_resolution)
    kal_uint16 vop_time_increment;
    // when set to '0' indicates that no subsequent data exists for the VOP
    kal_uint8 vop_coded;
    // time base
    kal_uint8 time_base;
    // temp temp base
    kal_uint8 old_time_base;
    // 1' indicates that there is no resync_marker in coded VOPs
    kal_uint8 resync_marker_disable;
    // =1, may contain interlaced video. =0, are non-interlanced video.
    kal_uint8 interlaced;
    // The value of this internal flag is set to 1 when the values of intra_dc_thr 
    // and the DCT quantiser indicate the usage of the intra DC VLCs as shown in Table 6?21. 
    // Otherwise, the value of this flag is set to 0. 
    kal_uint8 use_intra_dc_vlc;
    // =log2(hdr.height * hdr.width/(16*16)) 
    kal_uint8 mblength;
    // =Log2(vop_time_increment)
    kal_uint8 time_increment_length;
} m4v_dec_im;

/* The decore parameters */
typedef struct
{
    kal_uint32 *hardware_register;
    kal_uint8 *working_memory;
    kal_bool b_check_reentry;
} MPEG4_DECODE_STRUCT;

extern MPEG4_DECODE_STRUCT g_mpeg4_decode_info;

/* This function implement log2(arg)
 * @param  arg input data
 * @return log2(arg)
 */
extern kal_int32 mpeg4_util_log2ceil(kal_int32 arg);

/* This function write HW register from HW register buffer.
 * @param None
 * @return None
 */
extern void mpeg4_decode_write_register(void);

/* This function get the max width that the decoder supports 
 * @param None
 * @return width 
 */
extern kal_uint32 mpeg4_decode_get_max_width(void);

/* This function get the max height that the decoder supports 
 * @param None
 * @return height 
 */
extern kal_uint32 mpeg4_decode_get_max_height(void);

/* This function will obtain current frame duration. This function is only called in driver. (internal use)
 * @param None
 * @return The duration of current frame.
 */
extern kal_uint32 video_dec_get_curr_frame_duration(void);

/* Initialize decode resource. (Include hardware working memory and frame memory )
 * @param None
 * @return None 
 */
extern void mpeg4_decode_init(kal_uint32 max_width, kal_uint32 max_height);

/* This function decode the first frame bitstream, and store the related info to HW register buffer.
 * @param  vos_ptr VOS start address
 * @param  is_h263 is h.263/mpeg4 bistream
 * @param  vop_ptr VOP frame start address
 * @param  frame_length VOP frame length
 * @param  init_recref_buffer    initialize REC/REF buffer or not
 * @return Media status, which is based MEDIA_STATUS_CODE structure.
 */
extern MEDIA_STATUS_CODE mpeg4_decode_start(kal_uint8 * vos_ptr, kal_bool is_h263,
                                     kal_uint8 * vop_ptr, kal_uint32 frame_length, kal_bool init_refref_buffer);

/* Prepare decoder HW control signal
 * @param  frame_addr input vop address(input)
 * @param  frame_length input frame length(input)
 * @param  prev_frame_duration the previous frame duration
 * @return Media status, which is based MEDIA_STATUS_CODE structure.     
 */
extern MEDIA_STATUS_CODE mpeg4_decode_main(kal_uint8 * frame_addr, kal_uint32 frame_length, kal_uint32 prev_frame_duration);

#endif /*VIDEO_DECORE_H*/