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  1. /*
  2.  * All Video Processing kernels
  3.  * Copyright © <2010>, Intel Corporation.
  4.  *
  5.  * This program is licensed under the terms and conditions of the
  6.  * Eclipse Public License (EPL), version 1.0.  The full text of the EPL is at
  7.  * http://www.opensource.org/licenses/eclipse-1.0.php.
  8.  *
  9.  */
  10.  
  11. //---------- PL2_AVS_IEF_8x4.asm ----------
  12.  
  13. #include "AVS_IEF.inc"
  14.  
  15. //------------------------------------------------------------------------------
  16. // 2 sampler reads for 8x8 Y each
  17. // 1 sampler read for 8x8 U and 8x8 V (NV11\NV12 input surface)
  18. //------------------------------------------------------------------------------
  19.  
  20.     // 1st 8x8 setup
  21.     #include "AVS_SetupFirstBlock.asm"
  22.  
  23.     // Enable green channel only
  24.     mov (1) rAVS_8x8_HDR.2:ud      nAVS_GREEN_CHANNEL_ONLY:ud              
  25.  
  26.     mov (16) mAVS_8x8_HDR.0:ud      rAVS_8x8_HDR.0<8;8,1>:ud    // Copy msg header and payload mirrors to MRFs
  27.     send (1) uwAVS_RESPONSE(0)<1>   mAVS_8x8_HDR   udDUMMY_NULL      nSMPL_ENGINE        nAVS_MSG_DSC_1CH+nSI_SRC_Y+nBI_CURRENT_SRC_Y
  28.     // Return Y in 4 GRFs
  29.  
  30.     // 8x8 U and V sampling
  31.     // Enable red and blue channels  
  32.     //Only 8x4 wil be used  
  33.     mov (1) rAVS_8x8_HDR.2:ud  nAVS_RED_BLUE_CHANNELS:ud                  
  34.  
  35.     // Calculate Chroma Step Size:
  36.     // for H direction: 16 Luma samples are covered by 8 Chroma samples. Thus Chroma_Step_X = 2 * Luma_Step_X
  37.     // for V direction: 8  Luma samples are covered by 8 Chroma samples. Thus Chroma_Step_Y = Luma_Step_Y
  38.     mul  (1)  rAVS_PAYLOAD.1:f      fVIDEO_STEP_X:f    2.0:f             // Step X for chroma
  39.  
  40.     mov (16) mAVS_8x8_HDR_UV.0:ud      rAVS_8x8_HDR.0<8;8,1>:ud    // Copy msg header and payload mirrors to MRFs
  41.     send (1) uwAVS_RESPONSE(4)<1> mAVS_8x8_HDR_UV   udDUMMY_NULL  nSMPL_ENGINE    nAVS_MSG_DSC_2CH+nSI_SRC_UV+nBI_CURRENT_SRC_UV
  42.     // Return U and V in 8 GRFs
  43.  
  44.     // 2nd 8x8 setup
  45.     #include "AVS_SetupSecondBlock.asm"
  46.  
  47.     // 2nd 8x8 Y sampling
  48.     // Enable green channel only
  49.     mov (1) rAVS_8x8_HDR.2:ud      nAVS_GREEN_CHANNEL_ONLY:ud                          
  50.  
  51.     mov (16) mAVS_8x8_HDR.0:ud      rAVS_8x8_HDR.0<8;8,1>:ud    // Copy msg header and payload mirrors to MRFs
  52.     send (1) uwAVS_RESPONSE_2(0)<1>    mAVS_8x8_HDR    udDUMMY_NULL    nSMPL_ENGINE    nAVS_MSG_DSC_1CH+nSI_SRC_Y+nBI_CURRENT_SRC_Y
  53.  
  54. //------------------------------------------------------------------------------
  55. // Unpacking sampler reads to 4:2:0 internal planar
  56. //------------------------------------------------------------------------------
  57.     #include "PL2_AVS_IEF_Unpack_8x4.asm"
  58.  
  59.