#include "viddec_mp4_visualobject.h"
#include "viddec_types.h"

static inline uint8_t mp4_pvt_isValid_verID(uint8_t id)
{
    uint8_t ret=true;
    switch(id)
    {
        case 1:
        case 2:
        case 4:
        case 5:
        {
            break;
        }
        default:
        {
            ret = false;
            break;
        }
    }
    return ret;
} // mp4_pvt_isValid_verID

static mp4_Status_t mp4_Parse_video_signal_type(void *parent, mp4_VideoSignalType_t *vidSignal)
{
    uint32_t data=0;
    int32_t getbits=0;
    mp4_Status_t ret = MP4_STATUS_PARSE_ERROR;

    /* Set default values defined in spec first */
    vidSignal->video_format = 5;
    vidSignal->video_range = 0;
    vidSignal->colour_primaries = 1;
    vidSignal->transfer_characteristics = 1;
    vidSignal->matrix_coefficients = 1;
    do
    {
        getbits = viddec_pm_get_bits(parent, &data, 1);
        BREAK_GETBITS_FAIL(getbits, ret);
        vidSignal->is_video_signal_type = (data > 0);
        if(vidSignal->is_video_signal_type)
        {
            getbits = viddec_pm_get_bits(parent, &data, 5);
            BREAK_GETBITS_FAIL(getbits, ret);
            vidSignal->is_colour_description = data & 0x1;
            vidSignal->video_range = ((data & 0x2) > 0);
            data =  data >> 2;
            vidSignal->video_format = data & 0x7;
            if(vidSignal->is_colour_description)
            {
                getbits = viddec_pm_get_bits(parent, &data, 24);
                BREAK_GETBITS_FAIL(getbits, ret);
                vidSignal->colour_primaries = (data >> 16) & 0xFF;
                vidSignal->transfer_characteristics = (data >> 8) & 0xFF;
                vidSignal->matrix_coefficients = data & 0xFF;
            }
        }
        ret = MP4_STATUS_OK;
    }while(0);

    return ret;
} // mp4_Parse_video_signal_type

void mp4_set_hdr_bitstream_error(viddec_mp4_parser_t *parser, uint8_t hdr_flag, mp4_Status_t parse_status)
{
    //DEB("Entering mp4_set_hdr_bitstream_error: bs_err: 0x%x, hdr: %d, parse_status: %d\n", 
    //  parser->bitstream_error, hdr_flag, parse_status);

    if(hdr_flag)
    {
        if(parse_status & MP4_STATUS_NOTSUPPORT)
            parser->bitstream_error |= MP4_BS_ERROR_HDR_UNSUP;
        if(parse_status & MP4_STATUS_PARSE_ERROR)
            parser->bitstream_error |= MP4_BS_ERROR_HDR_PARSE;
        if(parse_status & MP4_STATUS_REQD_DATA_ERROR)
            parser->bitstream_error |= MP4_BS_ERROR_HDR_NONDEC;
        parser->bitstream_error &= MP4_HDR_ERROR_MASK;
    }
    else
    {
        if(parse_status & MP4_STATUS_NOTSUPPORT)
            parser->bitstream_error |= MP4_BS_ERROR_FRM_UNSUP;
        if(parse_status & MP4_STATUS_PARSE_ERROR)
            parser->bitstream_error |= MP4_BS_ERROR_FRM_PARSE;
        if(parse_status & MP4_STATUS_REQD_DATA_ERROR)
            parser->bitstream_error |= MP4_BS_ERROR_FRM_NONDEC;
    }    

    //DEB("Exiting mp4_set_hdr_bitstream_error: bs_err: 0x%x\n", parser->bitstream_error);

    return;
} // mp4_set_hdr_bitstream_error

mp4_Status_t mp4_Parse_VisualSequence(void *parent, viddec_mp4_parser_t *parser)
{
    uint32_t data=0;
    int32_t getbits=0;
    mp4_Status_t ret = MP4_STATUS_PARSE_ERROR;

    getbits = viddec_pm_get_bits(parent, &data, 8);
    if(getbits != -1)
    {
        parser->info.profile_and_level_indication = data & 0xFF;
        // If present, check for validity
        switch(parser->info.profile_and_level_indication)
        {
            case MP4_SIMPLE_PROFILE_LEVEL_0:
            case MP4_SIMPLE_PROFILE_LEVEL_1:
            case MP4_SIMPLE_PROFILE_LEVEL_2:
            case MP4_SIMPLE_PROFILE_LEVEL_3:
            case MP4_SIMPLE_PROFILE_LEVEL_4a:
            case MP4_SIMPLE_PROFILE_LEVEL_5:
            case MP4_SIMPLE_PROFILE_LEVEL_6:
            case MP4_ADVANCED_SIMPLE_PROFILE_LEVEL_0:
            case MP4_ADVANCED_SIMPLE_PROFILE_LEVEL_1:
            case MP4_ADVANCED_SIMPLE_PROFILE_LEVEL_2:
            case MP4_ADVANCED_SIMPLE_PROFILE_LEVEL_3:
            case MP4_ADVANCED_SIMPLE_PROFILE_LEVEL_4:
            case MP4_ADVANCED_SIMPLE_PROFILE_LEVEL_5:
            case MP4_ADVANCED_SIMPLE_PROFILE_LEVEL_3B:
                parser->bitstream_error = MP4_BS_ERROR_NONE;
                ret = MP4_STATUS_OK;
                break;
            default:
                parser->bitstream_error = MP4_BS_ERROR_HDR_UNSUP | MP4_BS_ERROR_HDR_NONDEC;
                break;
        }
    }
    else
    {
        parser->bitstream_error = MP4_BS_ERROR_HDR_PARSE | MP4_BS_ERROR_HDR_NONDEC;
    }

    return ret;
} // mp4_Parse_VisualSequence

mp4_Status_t mp4_Parse_VisualObject(void *parent, viddec_mp4_parser_t *parser)
{
    mp4_Info_t *pInfo = &(parser->info);
    mp4_VisualObject_t *visObj = &(pInfo->VisualObject);
    uint32_t data=0;
    int32_t getbits=0;
    mp4_Status_t ret = MP4_STATUS_PARSE_ERROR;

    do
    {
        getbits = viddec_pm_get_bits(parent, &data, 1);
        BREAK_GETBITS_FAIL(getbits, ret);
        visObj->is_visual_object_identifier = (data > 0);

        visObj->visual_object_verid = 1; /* Default value as per spec */
        if (visObj->is_visual_object_identifier)
        {
            viddec_pm_get_bits(parent, &data, 7);
            visObj->visual_object_priority = data & 0x7;
            data = data >> 3;
            if(mp4_pvt_isValid_verID(data & 0xF))
            {
                visObj->visual_object_verid = data & 0xF;
            }
            else
            {
                DEB("Warning: Unsupported visual_object_verid\n");
                parser->bitstream_error |= MP4_BS_ERROR_HDR_UNSUP;
                // Continue parsing as it is not a required field for decoder
            }
        }

        getbits = viddec_pm_get_bits(parent, &data, 4);
        BREAK_GETBITS_FAIL(getbits, ret);
        visObj->visual_object_type = data;
        if (visObj->visual_object_type != MP4_VISUAL_OBJECT_TYPE_VIDEO)
        {
            /* VIDEO is the only supported type */
            DEB("Error: Unsupported object: visual_object_type != video ID\n");
            parser->bitstream_error |= MP4_BS_ERROR_HDR_UNSUP;
            break;
        }

        /* Not required to check for visual_object_type as we already handle it above */
        ret = mp4_Parse_video_signal_type(parent, &(visObj->VideoSignalType));

        // No need to check for user data or visual object layer because they have a different start code
        // and will not be part of this header

    } while(0);

    mp4_set_hdr_bitstream_error(parser, true, ret);

    // POPULATE WORKLOAD ITEM
    {
        viddec_workload_item_t wi;
        mp4_VideoSignalType_t *vst = &(visObj->VideoSignalType);
    
        wi.vwi_type = VIDDEC_WORKLOAD_MPEG4_VISUAL_SEQ_OBJ;

        wi.mp4_vs_vo.vs_item = 0;
        wi.mp4_vs_vo.video_signal_type = 0;
        wi.mp4_vs_vo.color_desc = 0;

        viddec_fw_mp4_vs_set_profile_and_level_indication(&wi.mp4_vs_vo, pInfo->profile_and_level_indication);

        viddec_fw_mp4_vo_set_video_signal_type(&wi.mp4_vs_vo, vst->is_video_signal_type);
        if(vst->is_video_signal_type)
        {
            viddec_fw_mp4_vo_set_video_range(&wi.mp4_vs_vo, vst->video_range);
            viddec_fw_mp4_vo_set_video_format(&wi.mp4_vs_vo, vst->video_format);
            viddec_fw_mp4_vo_set_colour_description(&wi.mp4_vs_vo, vst->is_colour_description);
            if(vst->is_colour_description)
            {
                viddec_fw_mp4_vo_set_transfer_char(&wi.mp4_vs_vo, vst->transfer_characteristics);
                viddec_fw_mp4_vo_set_color_primaries(&wi.mp4_vs_vo, vst->colour_primaries);
            }
        }

        ret = viddec_pm_append_workitem(parent, &wi);
        if(ret == 1)
            ret = MP4_STATUS_OK;
    }
    
    return ret;
} // mp4_Parse_VisualObject

mp4_Status_t mp4_Parse_UserData(void *parent, viddec_mp4_parser_t *parser)
{
    mp4_Status_t ret = MP4_STATUS_PARSE_ERROR;
    uint32_t user_data;
    viddec_workload_item_t wi;

    DEB("ParseUser-prev_sc: 0x%x\n", parser->prev_sc);

    /* find the scope based on start code sc */
    switch(parser->prev_sc) {
        case MP4_SC_VISUAL_OBJECT_SEQUENCE:
            wi.vwi_type = VIDDEC_WORKLOAD_SEQ_USER_DATA;
            break;
        case MP4_SC_VISUAL_OBJECT:
            wi.vwi_type = VIDDEC_WORKLOAD_VISUAL_OBJ_USER_DATA;
            break;
        case MP4_SC_GROUP_OF_VOP:
            wi.vwi_type = VIDDEC_WORKLOAD_GOP_USER_DATA;
            break;
        case MP4_SC_VIDEO_OBJECT_LAYER_MIN:
            wi.vwi_type = VIDDEC_WORKLOAD_VIDEO_OBJ_USER_DATA;
            break;
        default:
            wi.vwi_type = VIDDEC_WORKLOAD_INVALID; //ERROR - should not happen
            break;
    }
    
    /* Read 1 byte of user data and store it in workitem for the current stream level (VS/VO/VOL/GVOP).
       Keep adding data payloads till it reaches size 11. When it is 11, the maximum user data payload size,
       append the workitem. This loop is repeated till all user data is extracted and appended. */
    wi.user_data.size = 0;
    while(viddec_pm_get_bits(parent, &user_data, 8) != -1)
    {
        /* Store the valid byte in data payload */
        wi.user_data.data_payload[wi.user_data.size] = user_data;
        wi.user_data.size++;
        
        /* When size exceeds payload size, append workitem and continue */
        if (wi.user_data.size >= 11)
        {
            viddec_pm_setup_userdata(&wi);
            ret = viddec_pm_append_workitem(parent, &wi);
            wi.user_data.size = 0;
        }
    }
    /* If size is not 0, append remaining user data. */
    if (wi.user_data.size > 0)
    {
        int i;
        for(i=wi.user_data.size;i<11;i++)
        {
            wi.user_data.data_payload[i] = 0;
        }
        viddec_pm_setup_userdata(&wi);
        ret = viddec_pm_append_workitem(parent, &wi);
        wi.user_data.size = 0;
    }

    if(ret == 1)
        ret = MP4_STATUS_OK;

    return ret;
} // mp4_Parse_UserData