| 1 | /*************************************************************************** |
|---|
| 2 | * Copyright (c) 2002-2006, Broadcom Corporation |
|---|
| 3 | * All Rights Reserved |
|---|
| 4 | * Confidential Property of Broadcom Corporation |
|---|
| 5 | * |
|---|
| 6 | * THIS SOFTWARE MAY ONLY BE USED SUBJECT TO AN EXECUTED SOFTWARE LICENSE |
|---|
| 7 | * AGREEMENT BETWEEN THE USER AND BROADCOM. YOU HAVE NO RIGHT TO USE OR |
|---|
| 8 | * EXPLOIT THIS MATERIAL EXCEPT SUBJECT TO THE TERMS OF SUCH AN AGREEMENT. |
|---|
| 9 | * |
|---|
| 10 | * $brcm_Workfile: bdccservice.c $ |
|---|
| 11 | * $brcm_Revision: 4 $ |
|---|
| 12 | * $brcm_Date: 5/10/06 6:49p $ |
|---|
| 13 | * |
|---|
| 14 | * Module Description: |
|---|
| 15 | * |
|---|
| 16 | * Revision History: |
|---|
| 17 | * |
|---|
| 18 | * $brcm_Log: /BSEAV/lib/ccgfx/source/bdccservice.c $ |
|---|
| 19 | * |
|---|
| 20 | * 4 5/10/06 6:49p shyam |
|---|
| 21 | * PR 8365 : Make it comiler warning free and ANSI C compliant |
|---|
| 22 | * |
|---|
| 23 | * 3 4/6/06 2:52p btosi |
|---|
| 24 | * PR3541: adding use of the BDBG_MODULE macro for integration with the |
|---|
| 25 | * RNG200 build |
|---|
| 26 | * |
|---|
| 27 | * 2 5/17/05 7:44p shyam |
|---|
| 28 | * PR 8365 : Making it work at runtime |
|---|
| 29 | * |
|---|
| 30 | * 1 5/9/05 3:50p shyam |
|---|
| 31 | * PR 8365 : Add other sub-modules of ccgfx |
|---|
| 32 | * |
|---|
| 33 | ***************************************************************************/ |
|---|
| 34 | |
|---|
| 35 | #include "bdcc_kernel.h" |
|---|
| 36 | #include "bdccservice.h" |
|---|
| 37 | #include "bdccpriv.h" |
|---|
| 38 | BDBG_MODULE(bdccservice); |
|---|
| 39 | |
|---|
| 40 | |
|---|
| 41 | typedef enum |
|---|
| 42 | { |
|---|
| 43 | BDCC_SRV_P_State_eLookingForHeader, |
|---|
| 44 | BDCC_SRV_P_State_eLookingForExtendedHeader, |
|---|
| 45 | BDCC_SRV_P_State_eCollectingBlock, |
|---|
| 46 | BDCC_SRV_P_State_eSkippingBlock, |
|---|
| 47 | BDCC_SRV_P_State_eFinishedHeader, |
|---|
| 48 | BDCC_SRV_P_State_eFinishedBlock |
|---|
| 49 | } BDCC_SRV_P_State ; |
|---|
| 50 | |
|---|
| 51 | //RLQ, tracking caption service block data received |
|---|
| 52 | #define MAX_CS 7 /* CS 1 - 6, plus extended service */ |
|---|
| 53 | |
|---|
| 54 | unsigned int BDCC_SRV_CS_Count[7] = { 0, 0, 0, 0, 0, 0, 0 }; |
|---|
| 55 | |
|---|
| 56 | unsigned int BDCC_SRV_Get_CS_Block_Count(int cs) |
|---|
| 57 | { |
|---|
| 58 | if ((cs >= 1) && (cs <= 7)) |
|---|
| 59 | return BDCC_SRV_CS_Count[cs - 1]; |
|---|
| 60 | else |
|---|
| 61 | return -1; |
|---|
| 62 | } |
|---|
| 63 | |
|---|
| 64 | /************************************************************************** |
|---|
| 65 | * |
|---|
| 66 | * Function: DccService_Process |
|---|
| 67 | * |
|---|
| 68 | * Inputs: |
|---|
| 69 | * pInBuf - input buffer |
|---|
| 70 | * ServiceA - service number |
|---|
| 71 | * ServiceB - service number, or BDCC_SRV_SERVICE_ILLEGAL |
|---|
| 72 | * |
|---|
| 73 | * Outputs: |
|---|
| 74 | * pOutBufA - output buffer |
|---|
| 75 | * pOutBufB - output buffer, or NULL |
|---|
| 76 | * pNewActivity - activity on selectged caption service |
|---|
| 77 | * |
|---|
| 78 | * Returns: BDCC_Error_eSuccess or a standard BDCC_Error error code |
|---|
| 79 | * |
|---|
| 80 | * Description: |
|---|
| 81 | * |
|---|
| 82 | * This function reads the input stream and outputs complete |
|---|
| 83 | * DTVCC service blocks, not including the header. |
|---|
| 84 | * |
|---|
| 85 | * The input stream format is that produced by DccPacket_Process and |
|---|
| 86 | * contains DTVCC packets. |
|---|
| 87 | * |
|---|
| 88 | * This version of the function does not consume the input and generate |
|---|
| 89 | * output for partial blocks. Only when the input contains one complete |
|---|
| 90 | * block will the input be consumed and the output generated. The output |
|---|
| 91 | * may contain multiple complete blocks. |
|---|
| 92 | * |
|---|
| 93 | **************************************************************************/ |
|---|
| 94 | BDCC_Error |
|---|
| 95 | BDCC_SRV_P_Process( |
|---|
| 96 | BDCC_CBUF * pInBuf, |
|---|
| 97 | unsigned int ServiceA, |
|---|
| 98 | unsigned int ServiceB, |
|---|
| 99 | BDCC_CBUF * pOutBufA, |
|---|
| 100 | BDCC_CBUF * pOutBufB, |
|---|
| 101 | bool * pNewActivity |
|---|
| 102 | ) |
|---|
| 103 | { |
|---|
| 104 | BDCC_SRV_P_State state ; |
|---|
| 105 | unsigned int BytesThisBlock ; |
|---|
| 106 | BDCC_CBUF * pOutInfo ; |
|---|
| 107 | unsigned int NumBytes ; |
|---|
| 108 | unsigned int HeaderBytes ; |
|---|
| 109 | unsigned int block_size = 0 ; |
|---|
| 110 | unsigned int service_number = 0 ; |
|---|
| 111 | unsigned int curIndex ; |
|---|
| 112 | unsigned char curByte ; |
|---|
| 113 | BDCC_DBG_MSG(("%s", __FUNCTION__)); |
|---|
| 114 | |
|---|
| 115 | *pNewActivity = false; |
|---|
| 116 | |
|---|
| 117 | /* |
|---|
| 118 | * Validate Arguments |
|---|
| 119 | */ |
|---|
| 120 | if ( pInBuf == NULL ) |
|---|
| 121 | { |
|---|
| 122 | BDCC_DBG_ERR(("BDCC_SRV_P_Process: null pointer as argument\n")) ; |
|---|
| 123 | return(BDCC_Error_eNullPointer) ; |
|---|
| 124 | } |
|---|
| 125 | |
|---|
| 126 | /* |
|---|
| 127 | * Prep output buffers. |
|---|
| 128 | */ |
|---|
| 129 | if ( pOutBufA ) |
|---|
| 130 | { |
|---|
| 131 | BDCC_CBUF_ResetPost(pOutBufA) ; |
|---|
| 132 | pOutBufA->Error = BDCC_Error_eSuccess ; |
|---|
| 133 | } |
|---|
| 134 | else |
|---|
| 135 | ServiceA = BDCC_SRV_SERVICE_ILLEGAL ; |
|---|
| 136 | |
|---|
| 137 | if ( pOutBufB ) |
|---|
| 138 | { |
|---|
| 139 | BDCC_CBUF_ResetPost(pOutBufB) ; |
|---|
| 140 | pOutBufB->Error = BDCC_Error_eSuccess ; |
|---|
| 141 | } |
|---|
| 142 | else |
|---|
| 143 | ServiceB = BDCC_SRV_SERVICE_ILLEGAL ; |
|---|
| 144 | |
|---|
| 145 | BDCC_CBUF_ResetPeek(pInBuf) ; |
|---|
| 146 | state = BDCC_SRV_P_State_eLookingForHeader ; |
|---|
| 147 | BytesThisBlock = 0 ; |
|---|
| 148 | pOutInfo = NULL ; |
|---|
| 149 | HeaderBytes = 0 ; |
|---|
| 150 | NumBytes = pInBuf->NumBytes ; |
|---|
| 151 | |
|---|
| 152 | for ( curIndex=0 ; curIndex < NumBytes ; curIndex++ ) |
|---|
| 153 | { |
|---|
| 154 | curByte = BDCC_CBUF_PeekByte(pInBuf) ; |
|---|
| 155 | switch ( state ) |
|---|
| 156 | { |
|---|
| 157 | case BDCC_SRV_P_State_eLookingForHeader : |
|---|
| 158 | |
|---|
| 159 | block_size = curByte & 0x1F ; |
|---|
| 160 | service_number = (curByte >> 5) & 0x07 ; |
|---|
| 161 | BytesThisBlock = 0 ; |
|---|
| 162 | pOutInfo = NULL ; |
|---|
| 163 | HeaderBytes = 1 ; |
|---|
| 164 | |
|---|
| 165 | BDCC_DBG_MSG(("%s: Service Numer = %d, block=%d", __FUNCTION__,service_number, block_size)); |
|---|
| 166 | |
|---|
| 167 | //RLQ |
|---|
| 168 | if (service_number > 0) |
|---|
| 169 | BDCC_SRV_CS_Count[service_number - 1]++; |
|---|
| 170 | |
|---|
| 171 | if ( service_number == 7) { |
|---|
| 172 | state = BDCC_SRV_P_State_eLookingForExtendedHeader ; |
|---|
| 173 | } |
|---|
| 174 | else |
|---|
| 175 | state = BDCC_SRV_P_State_eFinishedHeader ; |
|---|
| 176 | |
|---|
| 177 | break ; |
|---|
| 178 | |
|---|
| 179 | case BDCC_SRV_P_State_eLookingForExtendedHeader : |
|---|
| 180 | |
|---|
| 181 | HeaderBytes++ ; |
|---|
| 182 | service_number = curByte & 0x3F ; |
|---|
| 183 | state = BDCC_SRV_P_State_eFinishedHeader ; |
|---|
| 184 | break ; |
|---|
| 185 | |
|---|
| 186 | case BDCC_SRV_P_State_eCollectingBlock : |
|---|
| 187 | |
|---|
| 188 | BDCC_DBG_MSG(("%s: CollectingBlock = %d", __FUNCTION__,service_number)); |
|---|
| 189 | BDCC_CBUF_PostByte(pOutInfo, curByte) ; |
|---|
| 190 | |
|---|
| 191 | /* fall thru... */ |
|---|
| 192 | |
|---|
| 193 | case BDCC_SRV_P_State_eSkippingBlock : |
|---|
| 194 | |
|---|
| 195 | BDCC_DBG_MSG(("%s: SkippingBlock", __FUNCTION__)); |
|---|
| 196 | BytesThisBlock++ ; |
|---|
| 197 | if ( BytesThisBlock == block_size ) |
|---|
| 198 | { |
|---|
| 199 | /* done */ |
|---|
| 200 | state = BDCC_SRV_P_State_eFinishedBlock ; |
|---|
| 201 | } |
|---|
| 202 | break ; |
|---|
| 203 | |
|---|
| 204 | default : |
|---|
| 205 | break ; |
|---|
| 206 | |
|---|
| 207 | } /* switch (state) */ |
|---|
| 208 | |
|---|
| 209 | |
|---|
| 210 | /* |
|---|
| 211 | * Handle the sequential states now. |
|---|
| 212 | */ |
|---|
| 213 | |
|---|
| 214 | if ( state == BDCC_SRV_P_State_eFinishedHeader ) |
|---|
| 215 | { |
|---|
| 216 | BDCC_DBG_MSG(("%s: FinishedHeader", __FUNCTION__)); |
|---|
| 217 | if ( block_size == 0 || service_number == 0 ) |
|---|
| 218 | { |
|---|
| 219 | /* done, looking for next header */ |
|---|
| 220 | state = BDCC_SRV_P_State_eFinishedBlock ; |
|---|
| 221 | } |
|---|
| 222 | else if ( service_number == ServiceA ) |
|---|
| 223 | { |
|---|
| 224 | pOutInfo = pOutBufA ; |
|---|
| 225 | state = BDCC_SRV_P_State_eCollectingBlock ; |
|---|
| 226 | } |
|---|
| 227 | else if ( service_number == ServiceB ) |
|---|
| 228 | { |
|---|
| 229 | pOutInfo = pOutBufB ; |
|---|
| 230 | state = BDCC_SRV_P_State_eCollectingBlock ; |
|---|
| 231 | } |
|---|
| 232 | else |
|---|
| 233 | state = BDCC_SRV_P_State_eSkippingBlock ; |
|---|
| 234 | } |
|---|
| 235 | |
|---|
| 236 | if ( state == BDCC_SRV_P_State_eFinishedBlock ) |
|---|
| 237 | { |
|---|
| 238 | BDCC_DBG_MSG(("%s: FinishedBlock", __FUNCTION__)); |
|---|
| 239 | if ( pOutInfo ) |
|---|
| 240 | BDCC_CBUF_UpdatePost(pOutInfo) ; |
|---|
| 241 | *pNewActivity = true; |
|---|
| 242 | BDCC_CBUF_UpdatePeek(pInBuf) ; |
|---|
| 243 | |
|---|
| 244 | state = BDCC_SRV_P_State_eLookingForHeader ; |
|---|
| 245 | } |
|---|
| 246 | |
|---|
| 247 | } /* for (each input byte) */ |
|---|
| 248 | |
|---|
| 249 | /* |
|---|
| 250 | * this final BDCC_CBUF_UpdatePeek will ensure that any partial |
|---|
| 251 | * block at the end of the packet will get dropped and |
|---|
| 252 | * not be incorrectly interpreted -- note that this requires |
|---|
| 253 | * that the packet layer above stops at packet boundaries |
|---|
| 254 | */ |
|---|
| 255 | BDCC_CBUF_UpdatePeek(pInBuf) ; |
|---|
| 256 | |
|---|
| 257 | return(BDCC_Error_eSuccess) ; |
|---|
| 258 | |
|---|
| 259 | } /* DccService_Process */ |
|---|
| 260 | |
|---|
