write.c

   1 /*
   2  * Copyright (C) 2005-2006 Andre Noll <maan@systemlinux.org>
   3  *
   4  *     This program is free software; you can redistribute it and/or modify
   5  *     it under the terms of the GNU General Public License as published by
   6  *     the Free Software Foundation; either version 2 of the License, or
   7  *     (at your option) any later version.
   8  *
   9  *     This program is distributed in the hope that it will be useful,
  10  *     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *     GNU General Public License for more details.
  13  *
  14  *     You should have received a copy of the GNU General Public License
  15  *     along with this program; if not, write to the Free Software
  16  *     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  17  */
  18
  19 #include "para.h"
  20 #include "string.h"
  21 #include "write.cmdline.h"
  22 #include "list.h"
  23 #include "sched.h"
  24 #include "stdin.h"
  25 #include "write.h"
  26 #include "write_common.h"
  27 #include "fd.h"
  28 #include "error.h"
  29
  30 INIT_WRITE_ERRLISTS;
  31
  32 struct check_wav_task {
  33         char *buf;
  34         size_t *loaded;
  35         int *eof;
  36         unsigned channels;
  37         unsigned sample_rate;
  38         struct task task;
  39 };
  40
  41 struct initial_delay_task {
  42         struct timeval start_time;
  43         struct task task;
  44 };
  45
  46 struct gengetopt_args_info conf;
  47 struct stdin_task sit;
  48 struct check_wav_task cwt;
  49 struct initial_delay_task idt;
  50 static struct writer_node_group *wng;
  51
  52 #define WAV_HEADER_LEN 44
  53
  54 /**
  55  * test if audio buffer contains a valid wave header
  56  *
  57  * \return If not, return -E_NO_WAV_HEADER, otherwise, return zero. If
  58  * there is less than WAV_HEADER_LEN bytes awailable, return one.
  59  */
  60 static void check_wav_pre_select(struct sched *s, struct task *t)
  61 {
  62         struct check_wav_task *cwt = t->private_data;
  63         unsigned char *a;
  64
  65         if (*cwt->loaded < WAV_HEADER_LEN) {
  66                 t->ret = *cwt->eof? -E_PREMATURE_END : 1;
  67                 return;
  68         }
  69         a = (unsigned char*)cwt->buf;
  70         t->ret = -E_NO_WAV_HEADER;
  71         if (a[0] != 'R' || a[1] != 'I' || a[2] != 'F' || a[3] != 'F')
  72                 return;
  73         cwt->channels = (unsigned) a[22];
  74         cwt->sample_rate = a[24] + (a[25] << 8) + (a[26] << 16) + (a[27] << 24);
  75         *cwt->loaded -= WAV_HEADER_LEN;
  76         memmove(cwt->buf, cwt->buf + WAV_HEADER_LEN, *cwt->loaded);
  77         t->ret = -E_WAV_HEADER_SUCCESS;
  78         PARA_INFO_LOG("channels: %d, sample_rate: %d\n", cwt->channels, cwt->sample_rate);
  79 }
  80
  81 static void initial_delay_pre_select(struct sched *s, struct task *t)
  82 {
  83         struct initial_delay_task *idt = t->private_data;
  84         struct timeval diff;
  85
  86         t->ret = -E_NO_DELAY;
  87         if (!idt->start_time.tv_sec && !idt->start_time.tv_usec)
  88                 return;
  89         t->ret = -E_DELAY_TIMEOUT;
  90         if (tv_diff(&s->now, &idt->start_time, &diff) > 0)
  91                 return;
  92         t->ret = 1;
  93         if (tv_diff(&s->timeout , &diff, NULL) > 0)
  94                 s->timeout = diff;
  95 }
  96
  97 void para_log(int ll, const char* fmt,...)
  98 {
  99         va_list argp;
 100
 101         if (ll < conf.loglevel_arg)
 102                 return;
 103         va_start(argp, fmt);
 104         vfprintf(stderr, fmt, argp);
 105         va_end(argp);
 106 }
 107
 108 static struct writer_node_group *check_args(void)
 109 {
 110         int i, ret = -E_WRITE_SYNTAX;
 111         struct writer_node_group *wng = NULL;
 112
 113         if (conf.list_writers_given) {
 114                 char *msg = NULL;
 115                 FOR_EACH_WRITER(i) {
 116                         char *tmp = make_message("%s%s%s",
 117                                 i? msg : "",
 118                                 i? " " : "",
 119                                 writer_names[i]);
 120                         free(msg);
 121                         msg = tmp;
 122                 }
 123                 fprintf(stderr, "%s\n", msg);
 124                 free(msg);
 125                 exit(EXIT_SUCCESS);
 126         }
 127         if (conf.prebuffer_arg < 0 || conf.prebuffer_arg > 100)
 128                 goto out;
 129         if (conf.start_time_given) {
 130                 long unsigned sec, usec;
 131                 if (sscanf(conf.start_time_arg, "%lu:%lu",
 132                                 &sec, &usec) != 2)
 133                         goto out;
 134                 idt.start_time.tv_sec = sec;
 135                 idt.start_time.tv_usec = usec;
 136         }
 137         if (!conf.writer_given) {
 138                 wng = setup_default_wng();
 139                 ret = 1;
 140                 goto out;
 141         }
 142         wng = wng_new(conf.writer_given);
 143         for (i = 0; i < conf.writer_given; i++) {
 144                 ret = check_writer_arg(conf.writer_arg[i]);
 145                 if (ret < 0)
 146                         goto out;
 147                 wng->writer_nodes[i].writer = &writers[ret];
 148                 sprintf(wng->writer_nodes[i].task.status, "%s",
 149                         writer_names[ret]);
 150         }
 151         ret = 1;
 152 out:
 153         if (ret > 0)
 154                 return wng;
 155         free(wng);
 156         return NULL;
 157 }
 158
 159 static void idt_event_handler(struct task *t)
 160 {
 161         int ret;
 162
 163         PARA_INFO_LOG("%s\n", PARA_STRERROR(-t->ret));
 164         unregister_task(t);
 165         wng->buf = sit.buf;
 166         wng->loaded = &sit.loaded;
 167         wng->input_eof = &sit.eof;
 168         ret = wng_open(wng);
 169         if (ret < 0) {
 170                 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
 171                 exit(EXIT_FAILURE);
 172         }
 173 }
 174
 175 static void cwt_event_handler(struct task *t)
 176 {
 177         if (t->ret != -E_NO_WAV_HEADER && t->ret != -E_WAV_HEADER_SUCCESS) {
 178                 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-t->ret));
 179                 exit(EXIT_FAILURE);
 180         }
 181         PARA_INFO_LOG("%s\n", PARA_STRERROR(-t->ret));
 182         unregister_task(t);
 183         if (t->ret == -E_WAV_HEADER_SUCCESS) {
 184                 conf.channels_arg = cwt.channels;
 185                 conf.sample_rate_arg = cwt.sample_rate;
 186         }
 187         idt.task.pre_select = initial_delay_pre_select;
 188         idt.task.private_data = &idt;
 189         idt.task.event_handler = idt_event_handler;
 190         sprintf(idt.task.status, "initial_delay");
 191         register_task(&idt.task);
 192 }
 193
 194 int main(int argc, char *argv[])
 195 {
 196         int ret = -E_WRITE_SYNTAX;
 197         struct sched s;
 198
 199         cmdline_parser(argc, argv, &conf);
 200         wng = check_args();
 201         if (!wng)
 202                 goto out;
 203         init_supported_writers();
 204         init_sched();
 205
 206         stdin_set_defaults(&sit);
 207         sit.buf = para_malloc(sit.bufsize),
 208         register_task(&sit.task);
 209
 210         cwt.task.pre_select = check_wav_pre_select;
 211         cwt.task.private_data = &cwt;
 212         cwt.task.event_handler = cwt_event_handler;
 213         cwt.buf = sit.buf;
 214         cwt.loaded = &sit.loaded;
 215         cwt.eof = &sit.eof;
 216         sprintf(cwt.task.status, "check wav");
 217         register_task(&cwt.task);
 218
 219         s.default_timeout.tv_sec = 1;
 220         s.default_timeout.tv_usec = 0;
 221         ret = sched(&s);
 222
 223 out:
 224         if (ret < 0) {
 225                 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
 226                 ret = EXIT_FAILURE;
 227         } else
 228                 ret = EXIT_SUCCESS;
 229         return ret;
 230 }