FreeCalypso > hg > freecalypso-sw
view gsm-fw/L1/cfile/tch_feature.c @ 1021:8b52011dc66a
doc/Pirelli-Howto: update for the current situation
author | Mychaela Falconia <falcon@ivan.Harhan.ORG> |
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date | Sat, 23 Apr 2016 06:19:09 +0000 |
parents | a6ca9ee289f7 |
children | 6312f684cef1 |
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/* * This module is a FreeCalypso addition; it contains code implementing * our custom voice TCH rerouting feature. */ #include "config.h" #include "l1_confg.h" #include "l1_types.h" #include "sys_types.h" #include <string.h> #include "l1_const.h" #include "l1_defty.h" #include "l1_varex.h" #include "l1_trace.h" #include "tch_feature.h" T_RVT_USER_ID tch_reroute_rvt_id; BOOL tch_reroute_downlink; void tch_send_downlink_bits(API *dsp_buffer) { T_RVT_BUFFER buf; T_RVT_RET rc; UINT8 *dp; UWORD16 apiword; int i; rc = rvt_mem_alloc(tch_reroute_rvt_id, 41, &buf); if (rc != RVT_OK) return; dp = buf; *dp++ = TCH_DLBITS_IND; for (i = 0; i < 20; i++) { apiword = dsp_buffer[i]; *dp++ = apiword; *dp++ = apiword >> 8; } rvt_send_trace_no_cpy(buf, tch_reroute_rvt_id, 41, RVT_BINARY_FORMAT); } static void send_tch_ulbits_conf() { T_RVT_BUFFER buf; T_RVT_RET rc; rc = rvt_mem_alloc(tch_reroute_rvt_id, 1, &buf); if (rc == RVT_OK) { buf[0] = TCH_ULBITS_CONF; rvt_send_trace_no_cpy(buf, tch_reroute_rvt_id, 1, RVT_BINARY_FORMAT); } } #define UPLINK_QUEUE_SIZE 5 #define WORDS_PER_ENTRY 17 static UWORD16 uplink_data[UPLINK_QUEUE_SIZE][WORDS_PER_ENTRY]; static volatile int ul_read_ptr, ul_write_ptr; void tch_substitute_uplink(API *dsp_buffer) { int read_ptr; int i; read_ptr = ul_read_ptr; if (read_ptr == ul_write_ptr) { /* no uplink substitution */ l1s_dsp_com.dsp_ndb_ptr->d_tch_mode &= ~(1 << B_PLAY_UL); return; } for (i = 0; i < WORDS_PER_ENTRY; i++) dsp_buffer[i+3] = uplink_data[read_ptr][i]; // Fill data block Header... dsp_buffer[0] = (1 << B_BLUD); // 1st word: Set B_BLU bit. dsp_buffer[1] = 0; // 2nd word: cleared. dsp_buffer[2] = 0; // 3rd word: cleared. l1s_dsp_com.dsp_ndb_ptr->d_tch_mode |= (1 << B_PLAY_UL); /* advance the read pointer and send TCH_ULBITS_CONF */ read_ptr++; if (read_ptr >= UPLINK_QUEUE_SIZE) read_ptr = 0; ul_read_ptr = read_ptr; send_tch_ulbits_conf(); } static void handle_tch_ulbits_req(T_RVT_BUFFER pkt) { int write_ptr, write_next; write_ptr = ul_write_ptr; write_next = write_ptr + 1; if (write_next >= UPLINK_QUEUE_SIZE) write_next = 0; if (write_next == ul_read_ptr) /* queue full */ return; memcpy(uplink_data[write_ptr], pkt + 1, 34); ul_write_ptr = write_next; } static void handle_tch_config_req(T_RVT_BUFFER pkt) { UWORD8 config; T_RVT_BUFFER buf; T_RVT_RET rc; config = pkt[1] & 0x01; tch_reroute_downlink = config; /* send TCH_CONFIG_CONF response */ rc = rvt_mem_alloc(tch_reroute_rvt_id, 2, &buf); if (rc == RVT_OK) { buf[0] = TCH_CONFIG_CONF; buf[1] = config; rvt_send_trace_no_cpy(buf, tch_reroute_rvt_id, 2, RVT_BINARY_FORMAT); } } /* * The following function is the callback registered with RVT; it gets * called in RVT HISR context. */ static void tch_rvt_input_callback(T_RVT_BUFFER pkt, UINT16 pktlen) { if (pktlen < 1) return; switch (pkt[0]) { case TCH_CONFIG_REQ: if (pktlen != 2) return; handle_tch_config_req(pkt); break; case TCH_ULBITS_REQ: if (pktlen < 34) return; handle_tch_ulbits_req(pkt); break; } } void feature_tch_reroute_init() { rvt_register_id("TCH", &tch_reroute_rvt_id, tch_rvt_input_callback); tch_reroute_downlink = FALSE; ul_read_ptr = 0; ul_write_ptr = 0; }