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      1 /**
      2  * viddec_mpeg2_frame_attr.c
      3  * -------------------------
      4  * This is a helper file for viddec_mpeg2_workload.c to translate the data
      5  * stored in the parser context into frame attributes in the workload.
      6  */
      7 
      8 #include "viddec_mpeg2.h"
      9 
     10 /* viddec_mpeg2_print_attr() - Prints collected frame attributes             */
     11 static inline void viddec_mpeg2_print_attr(viddec_frame_attributes_t *attr)
     12 {
     13     unsigned int index = 0;
     14 
     15     MPEG2_FA_DEB("Content_Size=%dx%d\n",        attr->cont_size.width,
     16                                                 attr->cont_size.height);
     17     MPEG2_FA_DEB("Repeat=%d\n",                 attr->mpeg2.repeat_first_field);
     18     MPEG2_FA_DEB("Frame_Type=%d\n",             attr->frame_type);
     19     MPEG2_FA_DEB("Temporal_Reference=%d\n",     attr->mpeg2.temporal_ref);
     20     MPEG2_FA_DEB("Top_Field_First=%d\n",        attr->mpeg2.top_field_first);
     21     MPEG2_FA_DEB("Progressive_Frame=%d\n",      attr->mpeg2.progressive_frame);
     22     MPEG2_FA_DEB("Picture_Struct=%d\n",         attr->mpeg2.picture_struct);
     23     MPEG2_FA_DEB("Pan_Scan_Offsets=%d\n",       attr->mpeg2.number_of_frame_center_offsets);
     24 
     25     for (index = 0; index < attr->mpeg2.number_of_frame_center_offsets; index++)
     26     {
     27         MPEG2_FA_DEB("\tPan_Scan_Offset_%d= %dx%d\n", index,
     28         attr->mpeg2.frame_center_offset[index].horz,
     29         attr->mpeg2.frame_center_offset[index].vert);
     30     }
     31 
     32     return;
     33 }
     34 
     35 /* viddec_mpeg2_set_default_values() - Resets attributes that are optional   */
     36 /* in the bitstream to their default values.                                 */
     37 static inline void viddec_mpeg2_set_default_values(viddec_frame_attributes_t *attrs)
     38 {
     39     unsigned int index = 0;
     40 
     41     attrs->mpeg2.number_of_frame_center_offsets = 0;
     42     for (index = 0; index < MPEG2_MAX_VID_OFFSETS ; index++)
     43     {
     44         attrs->mpeg2.frame_center_offset[index].horz = 0;
     45         attrs->mpeg2.frame_center_offset[index].vert = 0;
     46     }
     47 
     48     return;
     49 }
     50 
     51 /* viddec_mpeg2_translate_attr() - Translates metadata parsed into frame     */
     52 /* attributes in the workload                                                */
     53 void viddec_mpeg2_translate_attr(void *parent, void *ctxt)
     54 {
     55     /* Get MPEG2 Parser context */
     56     struct viddec_mpeg2_parser *parser = (struct viddec_mpeg2_parser *) ctxt;
     57 
     58     /* Get workload */
     59     viddec_workload_t *wl = viddec_pm_get_header( parent );
     60 
     61     /* Get attributes in workload */
     62     viddec_frame_attributes_t *attrs = &wl->attrs;
     63 
     64     /* Get the default values for optional attributes */
     65     viddec_mpeg2_set_default_values(attrs);
     66 
     67     /* Populate attributes from parser context */
     68     /* Content Size */
     69     attrs->cont_size.height         = ((parser->info.seq_ext.vertical_size_extension << 12)
     70                                         | parser->info.seq_hdr.vertical_size_value);
     71     attrs->cont_size.width          = ((parser->info.seq_ext.horizontal_size_extension << 12)
     72                                         | parser->info.seq_hdr.horizontal_size_value);
     73 
     74     /* Repeat field */
     75     attrs->mpeg2.repeat_first_field = parser->info.pic_cod_ext.repeat_first_field;
     76 
     77     /* Temporal Reference */
     78     attrs->mpeg2.temporal_ref       = parser->info.pic_hdr.temporal_reference;
     79 
     80     /* Top field first */
     81     attrs->mpeg2.top_field_first    = parser->info.pic_cod_ext.top_field_first;
     82 
     83     /* Progressive frame */
     84     attrs->mpeg2.progressive_frame  = parser->info.pic_cod_ext.progressive_frame;
     85 
     86     /* Picture Structure */
     87     attrs->mpeg2.picture_struct     = parser->info.pic_cod_ext.picture_structure;
     88 
     89     /* Populate the frame type */
     90     switch (parser->info.pic_hdr.picture_coding_type)
     91     {
     92         case MPEG2_PC_TYPE_I: attrs->frame_type = VIDDEC_FRAME_TYPE_I; break;
     93         case MPEG2_PC_TYPE_P: attrs->frame_type = VIDDEC_FRAME_TYPE_P; break;
     94         case MPEG2_PC_TYPE_B: attrs->frame_type = VIDDEC_FRAME_TYPE_B; break;
     95         default:              attrs->frame_type = VIDDEC_FRAME_TYPE_INVALID;
     96     }
     97 
     98     /* Update PanScan data */
     99     if (parser->mpeg2_curr_frame_headers & MPEG2_HEADER_PIC_DISP_EXT)
    100     {
    101         unsigned int index = 0;
    102         attrs->mpeg2.number_of_frame_center_offsets = parser->mpeg2_num_pan_scan_offsets;
    103         for (index = 0; index < parser->mpeg2_num_pan_scan_offsets; index++)
    104         {
    105             attrs->mpeg2.frame_center_offset[index].horz = parser->info.pic_disp_ext.frame_center_horizontal_offset[index];
    106             attrs->mpeg2.frame_center_offset[index].vert = parser->info.pic_disp_ext.frame_center_vertical_offset[index];
    107         }
    108     }
    109 
    110     /* Print frame attributes */
    111     viddec_mpeg2_print_attr(attrs);
    112 
    113     return;
    114 }
    115