FreeCalypso > hg > sipout-test-utils
annotate test-voice/rtp_tx.c @ 15:71f01a834820
sipout-test-voice: implement play with offset
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sat, 11 May 2024 22:27:07 -0800 |
parents | f96153d15889 |
children | 830af7de3403 |
rev | line source |
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1 /* |
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2 * In this module we implement outgoing RTP stream generation. |
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3 */ |
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4 |
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5 #include <sys/types.h> |
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6 #include <sys/file.h> |
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7 #include <sys/stat.h> |
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8 #include <sys/socket.h> |
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9 #include <sys/time.h> |
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10 #include <netinet/in.h> |
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11 #include <stdio.h> |
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12 #include <stdint.h> |
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13 #include <stdlib.h> |
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14 #include <string.h> |
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15 #include <strings.h> |
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16 #include <unistd.h> |
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17 #include "../include/tmgw_const.h" |
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18 #include "../include/rtp_defs.h" |
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19 #include "../libutil/osmo_bits.h" |
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20 |
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21 extern struct sockaddr_in rtp_local_addr, rtp_remote_addr; |
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22 extern int rtp_udp_fd, rtcp_udp_fd, pcma_selected; |
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23 extern struct timeval cur_event_time; |
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24 |
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25 static const uint8_t dmw_alaw[8] = |
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26 {0x34, 0x21, 0x21, 0x34, 0xB4, 0xA1, 0xA1, 0xB4}; |
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27 static const uint8_t dmw_ulaw[8] = |
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28 {0x1E, 0x0B, 0x0B, 0x1E, 0x9E, 0x8B, 0x8B, 0x9E}; |
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29 |
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30 static uint32_t rtp_ssrc; |
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31 static uint32_t rtp_out_ts; |
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32 static uint16_t rtp_out_seq; |
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33 |
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34 static uint8_t pcm_fill_octet; |
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35 static int dmw_active; |
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36 |
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37 static uint8_t *play_buffer; |
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38 static unsigned play_buf_nframes, play_buf_ptr; |
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39 static int play_loop; |
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40 |
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41 static uint16_t tfo_fill_buf[9], tfo_req_buf[7]; |
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42 static uint16_t *is_out_ptr; |
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43 static unsigned is_out_count; |
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44 static int tfo_stop_req; |
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45 |
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46 void |
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47 assign_rtpout_ssrc() |
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48 { |
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49 rtp_ssrc = cur_event_time.tv_sec ^ cur_event_time.tv_usec ^ getpid(); |
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50 } |
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51 |
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52 void |
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53 init_pcm_fill_octet() |
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54 { |
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55 if (pcma_selected) |
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56 pcm_fill_octet = 0xD5; |
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57 else |
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58 pcm_fill_octet = 0xFF; |
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59 } |
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60 |
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61 void |
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62 prepare_tfo_fill() |
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63 { |
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64 tfo_fill_buf[0] = 0x15A; |
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65 tfo_fill_buf[1] = 0x1A9; |
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66 tfo_fill_buf[2] = 0x129; |
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67 tfo_fill_buf[3] = 0x15A; |
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68 tfo_fill_buf[4] = 0x1A9; |
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69 tfo_fill_buf[5] = 0x129; |
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70 tfo_fill_buf[6] = 0x15A; |
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71 tfo_fill_buf[7] = 0x1A9; |
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72 tfo_fill_buf[8] = 0x129; |
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73 } |
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74 |
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75 static void |
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76 insert_is_msg(payload, word) |
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77 uint8_t *payload; |
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78 uint16_t word; |
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79 { |
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80 ubit_t is_bits[10]; |
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81 uint8_t *bytep; |
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82 unsigned n; |
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83 |
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84 uint16_to_bits(word, is_bits, 10); |
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85 for (n = 0; n < 10; n++) { |
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86 bytep = payload + n * 16; |
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87 *bytep &= 0xFE; |
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88 *bytep |= is_bits[n]; |
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89 } |
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90 } |
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91 |
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92 static void |
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93 fill_with_dmw(buf) |
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94 uint8_t *buf; |
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95 { |
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96 const uint8_t *src; |
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97 unsigned n; |
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98 |
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99 if (pcma_selected) |
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100 src = dmw_alaw; |
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101 else |
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102 src = dmw_ulaw; |
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103 for (n = 0; n < 20; n++) { |
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104 memcpy(buf, src, 8); |
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105 buf += 8; |
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106 } |
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107 } |
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108 |
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109 static void |
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110 fill_with_play(outbuf) |
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111 uint8_t *outbuf; |
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112 { |
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113 memcpy(outbuf, play_buffer + play_buf_ptr * 160, 160); |
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114 play_buf_ptr++; |
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115 if (play_buf_ptr < play_buf_nframes) |
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116 return; |
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117 if (play_loop) |
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118 play_buf_ptr = 0; |
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119 else { |
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120 free(play_buffer); |
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121 play_buffer = 0; |
15
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122 printf("file play finished\n"); |
14
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123 } |
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124 } |
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125 |
0
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126 void |
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127 generate_rtp_packet() |
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128 { |
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129 struct rtp_packet pkt; |
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130 socklen_t addrlen; |
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131 |
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132 pkt.v_p_x_cc = 0x80; |
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133 pkt.m_pt = pcma_selected ? PSTN_CODEC_PCMA : PSTN_CODEC_PCMU; |
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134 pkt.seq = htons(rtp_out_seq++); |
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135 pkt.tstamp = htonl(rtp_out_ts); |
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136 rtp_out_ts += 160; |
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137 pkt.ssrc = rtp_ssrc; |
14
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138 if (play_buffer) |
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139 fill_with_play(pkt.payload); |
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140 else if (dmw_active) |
13
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141 fill_with_dmw(pkt.payload); |
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142 else |
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143 memset(pkt.payload, pcm_fill_octet, RTP_MAX_PAYLOAD); |
0
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144 if (is_out_count) { |
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145 insert_is_msg(pkt.payload, *is_out_ptr++); |
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146 is_out_count--; |
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147 if (!is_out_count && !tfo_stop_req) { |
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148 is_out_ptr = tfo_req_buf; |
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149 is_out_count = 7; |
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150 } |
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|
151 } |
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152 addrlen = sizeof(struct sockaddr_in); |
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153 sendto(rtp_udp_fd, &pkt, RTP_PACKET_SIZE_PSTN, 0, |
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154 (struct sockaddr *) &rtp_remote_addr, addrlen); |
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155 } |
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|
156 |
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|
157 void |
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|
158 set_pcm_fill_octet(oct) |
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159 unsigned oct; |
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|
160 { |
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161 pcm_fill_octet = oct; |
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|
162 } |
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|
163 |
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|
164 void |
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|
165 send_tfo_req(sig, codec) |
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|
166 unsigned sig, codec; |
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|
167 { |
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|
168 tfo_req_buf[0] = 0x15A; |
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|
169 tfo_req_buf[1] = 0x1A9; |
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|
170 tfo_req_buf[2] = 0x05D; |
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|
171 tfo_req_buf[3] = 0x14E; |
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|
172 tfo_req_buf[4] = 0x14B; |
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|
173 encode_tfo_ext_words(sig, codec, 0, tfo_req_buf + 5); |
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174 is_out_ptr = tfo_fill_buf; |
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175 is_out_count = 9; |
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|
176 tfo_stop_req = 0; |
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|
177 } |
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|
178 |
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parents:
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|
179 void |
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parents:
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|
180 stop_tfo_out() |
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|
181 { |
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|
182 tfo_stop_req = 1; |
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|
183 } |
13
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184 |
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185 void |
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|
186 cmd_dmw_on() |
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187 { |
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188 dmw_active = 1; |
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|
189 } |
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190 |
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|
191 void |
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|
192 cmd_dmw_off() |
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193 { |
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194 dmw_active = 0; |
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|
195 } |
14
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|
196 |
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|
197 void |
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|
198 play_file_cmdop(filename, loop) |
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199 char *filename; |
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|
200 { |
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|
201 int fd; |
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|
202 struct stat st; |
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|
203 |
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|
204 if (play_buffer) { |
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|
205 fprintf(stderr, "error: file play already in progress\n"); |
f96153d15889
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|
206 return; |
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13
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|
207 } |
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|
208 fd = open(filename, O_RDONLY); |
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|
209 if (fd < 0) { |
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diff
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|
210 perror(filename); |
f96153d15889
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diff
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|
211 return; |
f96153d15889
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13
diff
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|
212 } |
f96153d15889
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13
diff
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|
213 fstat(fd, &st); |
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13
diff
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|
214 if (!S_ISREG(st.st_mode)) { |
f96153d15889
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13
diff
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|
215 close(fd); |
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13
diff
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|
216 fprintf(stderr, "error: %s is not a regular file\n", filename); |
f96153d15889
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13
diff
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|
217 return; |
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13
diff
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|
218 } |
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13
diff
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|
219 if (st.st_size % 160) { |
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13
diff
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|
220 close(fd); |
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13
diff
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|
221 fprintf(stderr, |
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13
diff
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|
222 "error: size of %s is not a multiple of 160 bytes\n", |
f96153d15889
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13
diff
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|
223 filename); |
f96153d15889
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13
diff
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|
224 return; |
f96153d15889
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13
diff
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|
225 } |
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13
diff
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|
226 play_buffer = malloc(st.st_size); |
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13
diff
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|
227 if (!play_buffer) { |
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|
228 close(fd); |
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13
diff
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|
229 fprintf(stderr, "unable to malloc buffer for %s\n", filename); |
f96153d15889
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13
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|
230 return; |
f96153d15889
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13
diff
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|
231 } |
f96153d15889
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13
diff
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|
232 read(fd, play_buffer, st.st_size); |
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233 close(fd); |
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234 play_buf_nframes = st.st_size / 160; |
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235 play_buf_ptr = 0; |
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236 play_loop = loop; |
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237 } |
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238 |
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239 void |
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240 play_file_offset(filename, offset) |
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241 char *filename; |
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242 unsigned offset; |
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243 { |
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244 int fd; |
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245 struct stat st; |
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246 unsigned pre_offset; |
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247 |
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248 if (play_buffer) { |
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249 fprintf(stderr, "error: file play already in progress\n"); |
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250 return; |
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251 } |
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252 fd = open(filename, O_RDONLY); |
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253 if (fd < 0) { |
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254 perror(filename); |
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255 return; |
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256 } |
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257 fstat(fd, &st); |
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258 if (!S_ISREG(st.st_mode)) { |
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259 close(fd); |
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260 fprintf(stderr, "error: %s is not a regular file\n", filename); |
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261 return; |
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262 } |
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263 if (st.st_size % 160) { |
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264 close(fd); |
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265 fprintf(stderr, |
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266 "error: size of %s is not a multiple of 160 bytes\n", |
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267 filename); |
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268 return; |
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269 } |
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270 play_buffer = malloc(st.st_size + 160); |
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271 if (!play_buffer) { |
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272 close(fd); |
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273 fprintf(stderr, "unable to malloc buffer for %s\n", filename); |
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274 return; |
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275 } |
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276 pre_offset = 160 - offset; |
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277 memset(play_buffer, pcm_fill_octet, pre_offset); |
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278 read(fd, play_buffer + pre_offset, st.st_size); |
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279 close(fd); |
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280 memset(play_buffer + pre_offset + st.st_size, pcm_fill_octet, offset); |
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281 play_buf_nframes = st.st_size / 160 + 1; |
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282 play_buf_ptr = 0; |
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283 play_loop = 0; |
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284 } |
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285 |
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286 void |
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287 play_file_stop() |
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288 { |
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289 if (!play_buffer) |
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290 return; |
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291 free(play_buffer); |
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292 play_buffer = 0; |
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293 } |