[0] | 1 | //loop.c: |
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| 2 | |
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[668] | 3 | /* |
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| 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2008 |
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| 5 | * |
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| 6 | * This file is part of roard a part of RoarAudio, |
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| 7 | * a cross-platform sound system for both, home and professional use. |
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| 8 | * See README for details. |
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| 9 | * |
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| 10 | * This file is free software; you can redistribute it and/or modify |
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| 11 | * it under the terms of the GNU General Public License version 3 |
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| 12 | * as published by the Free Software Foundation. |
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| 13 | * |
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| 14 | * RoarAudio is distributed in the hope that it will be useful, |
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| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 17 | * GNU General Public License for more details. |
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| 18 | * |
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| 19 | * You should have received a copy of the GNU General Public License |
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| 20 | * along with this software; see the file COPYING. If not, write to |
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| 21 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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| 22 | * |
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| 23 | */ |
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| 24 | |
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[0] | 25 | #include "roard.h" |
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| 26 | |
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| 27 | int main_loop (int driver, DRIVER_USERDATA_T driver_inst, struct roar_audio_info * sa) { |
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| 28 | void ** streams_input = NULL; |
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[547] | 29 | int term = 0; |
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| 30 | int streams; |
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[9] | 31 | #ifdef MONITOR_LATENCY |
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| 32 | struct timeval try, ans; |
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| 33 | long int ans_1last = 0, ans_2last = 0, ans_3last = 0; |
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[36] | 34 | long int loopc = 0; |
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[9] | 35 | |
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| 36 | printf("\n\e[s"); |
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| 37 | fflush(stdout); |
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| 38 | #endif |
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[0] | 39 | |
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| 40 | ROAR_DBG("main_loop(*) = ?"); |
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| 41 | alive = 1; |
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[258] | 42 | g_pos = 0; |
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[0] | 43 | |
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| 44 | while (alive) { |
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[9] | 45 | #ifdef MONITOR_LATENCY |
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| 46 | gettimeofday(&try, NULL); |
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| 47 | #endif |
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| 48 | |
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[0] | 49 | ROAR_DBG("main_loop(*): looping..."); |
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| 50 | |
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[68] | 51 | if ( g_listen_socket != -1 ) { |
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| 52 | ROAR_DBG("main_loop(*): check for new clients..."); |
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| 53 | net_check_listen(); |
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| 54 | } |
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[0] | 55 | |
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| 56 | ROAR_DBG("main_loop(*): check for new data..."); |
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[547] | 57 | if ( clients_check_all() == 0 && g_terminate && g_listen_socket == -1 ) { |
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| 58 | term = 1; |
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| 59 | } |
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[0] | 60 | |
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| 61 | ROAR_DBG("main_loop(*): mixing clients..."); |
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| 62 | if ( g_standby ) { |
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| 63 | // while in standby we still neet to get the buffers to free input buffer space. |
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[547] | 64 | streams = streams_get_mixbuffers(&streams_input, sa, g_pos); |
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[0] | 65 | } else { |
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[547] | 66 | if ( ( streams = streams_get_mixbuffers(&streams_input, sa, g_pos)) != -1 ) { |
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[0] | 67 | mix_clients(g_output_buffer, sa->bits, streams_input, ROAR_OUTPUT_BUFFER_SAMPLES * sa->channels); |
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| 68 | } |
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| 69 | } |
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| 70 | |
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[547] | 71 | if ( term && streams < 1 ) |
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| 72 | alive = 0; |
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| 73 | |
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[0] | 74 | /* |
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| 75 | // while in standby we still need to write out our buffer to not run in an endless loop without |
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| 76 | // a break |
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| 77 | */ |
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| 78 | |
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| 79 | if ( g_standby ) { |
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| 80 | usleep((1000000 * ROAR_OUTPUT_BUFFER_SAMPLES) / sa->rate); |
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[729] | 81 | ROAR_DBG("usleep(%u) = ?\n", (1000000 * ROAR_OUTPUT_BUFFER_SAMPLES) / sa->rate); |
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[0] | 82 | } else { |
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[258] | 83 | clients_send_filter(sa, g_pos); |
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[0] | 84 | output_buffer_flush(driver_inst, driver); |
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[258] | 85 | clients_send_mon(sa, g_pos); |
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[0] | 86 | } |
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[257] | 87 | |
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[258] | 88 | midi_cb_update(); |
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[0] | 89 | // output_buffer_reinit(); |
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| 90 | |
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[258] | 91 | g_pos = ROAR_MATH_OVERFLOW_ADD(g_pos, ROAR_OUTPUT_BUFFER_SAMPLES); |
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[259] | 92 | ROAR_DBG("main_loop(*): current pos: %u", g_pos); |
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[9] | 93 | #ifdef MONITOR_LATENCY |
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| 94 | gettimeofday(&ans, NULL); |
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| 95 | |
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| 96 | while (ans.tv_sec > try.tv_sec) { |
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| 97 | ans.tv_sec--; |
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| 98 | ans.tv_usec += 1000000; |
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| 99 | } |
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| 100 | ans.tv_usec -= try.tv_usec; |
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| 101 | |
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[36] | 102 | if ( loopc % 128 ) { |
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[9] | 103 | printf("\e[ucurrent latency: %.3fms average: %.3fms ", ans.tv_usec / (double)1000, |
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| 104 | (ans.tv_usec+ans_3last+ans_2last+ans_1last)/ (double)4000); |
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| 105 | fflush(stdout); |
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| 106 | } |
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| 107 | |
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| 108 | ans_3last = ans_2last; |
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| 109 | ans_2last = ans_1last; |
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| 110 | ans_1last = ans.tv_usec; |
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[36] | 111 | loopc++; |
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[9] | 112 | #endif |
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[0] | 113 | } |
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| 114 | |
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| 115 | return -1; |
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| 116 | } |
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| 117 | |
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| 118 | //ll |
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