--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/videoeditorengine/h263decoder/src/decmbdct.cpp Fri Jan 29 14:08:33 2010 +0200
@@ -0,0 +1,352 @@
+/*
+* Copyright (c) 2010 Ixonos Plc.
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of the "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - Initial contribution
+*
+* Contributors:
+* Ixonos Plc
+*
+* Description:
+* Prediction error block decoding functions.
+*
+*/
+
+
+
+/*
+ * Includes
+ */
+#include "h263dConfig.h"
+#include "decmbdct.h"
+#include "decblock.h"
+#include "block.h"
+#include "viddemux.h"
+/* MVE */
+#include "MPEG4Transcoder.h"
+
+/*
+ * Globals
+ */
+
+/* New chroma QP values in MQ mode. See Table T.1/H.263 */
+static const u_char dmdMQChromaTab[32] = {0,1,2,3,4,5,6,6,7,8,9,9,10,10,
+ 11,11,12,12,12,13,13,13,14,14,
+ 14,14,14,15,15,15,15,15};
+
+
+/*
+ * Global functions
+ */
+
+
+/* {{-output"dmdGetAndDecodeIMBBlocks.txt"}} */
+/*
+ * dmdGetAndDecodeIMBBlocks
+ *
+ *
+ * Parameters:
+ * param parameters needed in this function
+ *
+ * Function:
+ * This function gets the DCT coefficients of an INTRA macroblock
+ * from the bitstream, reconstructs the corresponding
+ * pixel-domain blocks and puts the blocks to the output frame.
+ *
+ * Returns:
+ * >= 0 the function was successful
+ * < 0 an error occured when accessing bit buffer
+ *
+ */
+
+int dmdGetAndDecodeIMBBlocks(
+ dmdIParam_t *param, CMPEG4Transcoder *hTranscoder)
+/* {{-output"dmdGetAndDecodeIMBBlocks.txt"}} */
+{
+ bibBuffer_t
+ *inBuffer; /* Input bit buffer instance */
+
+ TBool getDecodedFrame;
+
+
+ int
+ cWidth, /* Chrominance image width in pixels */
+ block[64], /* Temporal 8 x 8 block of pixels */
+ i, /* Loop variable */
+ chrQuant, /* Quantization parameter for chroma */
+ bitErrorIndication = 0,
+ /* Carries bit error indication information returned
+ by the video demultiplexer module */
+ ret = 0; /* Used to check return values of function calls */
+
+ u_char
+ *yBlockInFrame; /* Points to top-left corner of the current block
+ inside the current frame */
+
+ inBuffer = param->inBuffer;
+
+ getDecodedFrame = param->iGetDecodedFrame;
+
+
+ yBlockInFrame = param->yMBInFrame;
+ cWidth = param->yWidth / 2;
+
+
+ /* Luminance blocks */
+ for (i=0; i<4; i++)
+ {
+ /* MVE */
+ hTranscoder->BeginOneBlock(i);
+
+ bitErrorIndication = 0;
+
+ /* Get DCT coefficients */
+ ret = vdxGetIntraDCTBlock(inBuffer, vdxIsYCoded(param->cbpy, i + 1),
+ block, &bitErrorIndication, param->fMQ, param->quant);
+ if ( ret < 0 )
+ return DMD_ERR;
+ else if ( ret == VDX_OK_BUT_BIT_ERROR )
+ goto corruptedMB;
+
+ /* MVE */
+ hTranscoder->AddOneBlockDataToMB(i, block);
+ if(getDecodedFrame || hTranscoder->NeedDecodedYUVFrame()) // we need the YUV frames.
+ {
+
+ dblIdctAndDequant(block, param->quant, 1);
+ blcBlockToFrame(block, yBlockInFrame, param->yWidth);
+ yBlockInFrame += 8;
+ if (i & 1)
+ yBlockInFrame += 8 * param->yWidth - 16;
+ }
+
+ } /* for (y blocks) */
+
+ /* MVE */
+ hTranscoder->BeginOneBlock(4);
+
+ /* Chrominance blocks (U) */
+ bitErrorIndication = 0;
+ /* Find out the value of QP for chrominance block. */
+ chrQuant = (param->fMQ)?dmdMQChromaTab[param->quant]:param->quant;
+
+ /* Get DCT coefficients */
+ ret = vdxGetIntraDCTBlock(inBuffer, vdxIsUCoded(param->cbpc),
+ block, &bitErrorIndication, param->fMQ, chrQuant);
+ if ( ret < 0 )
+ return DMD_ERR;
+ else if ( ret == VDX_OK_BUT_BIT_ERROR )
+ goto corruptedMB;
+
+ /* MVE */
+ hTranscoder->AddOneBlockDataToMB(4, block);
+ hTranscoder->BeginOneBlock(5);
+ if(getDecodedFrame || hTranscoder->NeedDecodedYUVFrame())
+ {
+ dblIdctAndDequant(block, chrQuant, 1);
+ blcBlockToFrame(block, param->uBlockInFrame, cWidth);
+ }
+
+ /* (V) */
+ bitErrorIndication = 0;
+ /* Get DCT coefficients */
+ ret = vdxGetIntraDCTBlock(inBuffer, vdxIsVCoded(param->cbpc),
+ block, &bitErrorIndication, param->fMQ, chrQuant);
+ if ( ret < 0 )
+ return DMD_ERR;
+ else if ( ret == VDX_OK_BUT_BIT_ERROR )
+ goto corruptedMB;
+
+ /* MVE */
+ hTranscoder->AddOneBlockDataToMB(5, block);
+ if ( hTranscoder->TranscodingOneMB(NULL) != DMD_OK )
+ {
+ return DMD_ERR;
+ }
+ if(getDecodedFrame || hTranscoder->NeedDecodedYUVFrame())
+ {
+
+ dblIdctAndDequant(block, chrQuant, 1);
+ blcBlockToFrame(block, param->vBlockInFrame, cWidth);
+
+ }
+
+ return DMD_OK;
+
+corruptedMB:
+
+ return DMD_BIT_ERR;
+}
+
+
+/* {{-output"dmdGetAndDecodePMBBlocks.txt"}} */
+/*
+ * dmdGetAndDecodePMBBlocks
+ *
+ *
+ * Parameters:
+ * param parameters needed in this function
+ *
+ * Function:
+ * This function gets the DCT coefficients of an INTER macroblock
+ * from the bitstream, reconstructs the corresponding
+ * pixel-domain blocks and adds the blocks to the prediction frame.
+ *
+ * Returns:
+ * >= 0 the function was successful
+ * < 0 an error occured when accessing bit buffer
+ *
+ */
+
+int dmdGetAndDecodePMBBlocks(
+ dmdPParam_t *param, CMPEG4Transcoder *hTranscoder)
+/* {{-output"dmdGetAndDecodePMBBlocks.txt"}} */
+{
+ bibBuffer_t
+ *inBuffer; /* Input bit buffer instance */
+
+
+ TBool getDecodedFrame;
+
+ int
+ yWidth, /* Luminance image width in pixels */
+ block[64], /* Temporal 8 x 8 block of pixels */
+ i, /* Loop variable */
+ chrQuant, /* Quantization parameter for chroma */
+ bitErrorIndication = 0,
+ /* Carries bit error indication information returned
+ by the video demultiplexer module */
+ ret = 0; /* Used to check return values of function calls */
+
+ u_char
+ *yBlockInFrame; /* Points to top-left corner of the current block
+ inside the current frame */
+
+ inBuffer = param->inBuffer;
+
+
+ getDecodedFrame = param->iGetDecodedFrame;
+
+
+ yWidth = param->uvWidth * 2;
+ yBlockInFrame = param->currYMBInFrame;
+
+
+ int fEscapeCodeUsed = 0;
+
+ /* Luminance blocks */
+ for (i = 0; i < 4; i++) {
+
+ hTranscoder->BeginOneBlock(i);
+
+ if (vdxIsYCoded(param->cbpy, i + 1))
+ {
+ /* Get DCT coefficients */
+ ret = vdxGetDCTBlock(inBuffer, 0, 0, block,
+ &bitErrorIndication, 0, param->quant, &fEscapeCodeUsed);
+ if ( ret < 0 )
+ return DMD_ERR;
+ else if ( ret == VDX_OK_BUT_BIT_ERROR )
+ return DMD_BIT_ERR;
+
+ /* MVE */
+ hTranscoder->H263EscapeCoding(i, fEscapeCodeUsed);
+ hTranscoder->AddOneBlockDataToMB(i, block);
+ if(getDecodedFrame || hTranscoder->NeedDecodedYUVFrame())
+ {
+
+ dblIdctAndDequant(block, param->quant, 0);
+
+ blcAddBlock(block, yBlockInFrame,
+ yWidth, param->mbPlace,
+ (u_char) param->fAdvancedPrediction, param->diffMB->block[i]);
+ }
+ }
+
+ /* MVE */
+ else
+ {
+ hTranscoder->H263EscapeCoding(i, fEscapeCodeUsed);
+ hTranscoder->AddOneBlockDataToMB(i, NULL);
+ }
+
+ yBlockInFrame += 8;
+ if (i & 1)
+ yBlockInFrame += ((/*8 **/ yWidth<<3) - 16);
+ } /* for (y blocks) */
+
+ /* Find out the value of QP for chrominance block. */
+ chrQuant = param->quant;
+
+ hTranscoder->BeginOneBlock(4);
+
+ /* Chrominance blocks (U) */
+ if (vdxIsUCoded(param->cbpc))
+ {
+ /* Get DCT coefficients */
+ ret = vdxGetDCTBlock(inBuffer, 0, 0, block,
+ &bitErrorIndication, 0, param->quant, &fEscapeCodeUsed);
+ if ( ret < 0 )
+ return DMD_ERR;
+ else if ( ret == VDX_OK_BUT_BIT_ERROR )
+ return DMD_BIT_ERR;
+
+ hTranscoder->H263EscapeCoding(4, fEscapeCodeUsed);
+ hTranscoder->AddOneBlockDataToMB(4, block);
+ if(getDecodedFrame || hTranscoder->NeedDecodedYUVFrame())
+ {
+
+ dblIdctAndDequant(block, chrQuant,0);
+ blcAddBlock(block, param->currUBlkInFrame, param->uvWidth, 0, 0, 0);
+ }
+ }
+
+ else
+ {
+ hTranscoder->H263EscapeCoding(4, fEscapeCodeUsed);
+ hTranscoder->AddOneBlockDataToMB(4, NULL);
+ }
+
+ hTranscoder->BeginOneBlock(5);
+
+ /* (V) */
+ if (vdxIsVCoded(param->cbpc))
+ {
+ /* Get DCT coefficients */
+ ret = vdxGetDCTBlock(inBuffer, 0, 0, block,
+ &bitErrorIndication, 0, param->quant, &fEscapeCodeUsed);
+ if ( ret < 0 )
+ return DMD_ERR;
+ else if ( ret == VDX_OK_BUT_BIT_ERROR )
+ return DMD_BIT_ERR;
+
+ /* MVE */
+ hTranscoder->H263EscapeCoding(5, fEscapeCodeUsed);
+ hTranscoder->AddOneBlockDataToMB(5, block);
+ if(getDecodedFrame || hTranscoder->NeedDecodedYUVFrame())
+ {
+
+ dblIdctAndDequant(block, chrQuant,0);
+ blcAddBlock(block, param->currVBlkInFrame, param->uvWidth, 0, 0, 0);
+ }
+ }
+ else
+ {
+ hTranscoder->H263EscapeCoding(5, fEscapeCodeUsed);
+ hTranscoder->AddOneBlockDataToMB(5, NULL);
+ }
+
+ if ( hTranscoder->TranscodingOneMB(param) != TX_OK )
+ {
+ return DMD_ERR;
+ }
+ return DMD_OK;
+
+}
+
+// End of File