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 samplerate;
  38         struct task task;
  39 };
  40
  41 struct initial_delay_task {
  42         struct timeval start_time;
  43         struct task task;
  44 };
  45
  46 static struct write_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(__a_unused struct sched *s, struct task *t)
  61 {
  62         struct check_wav_task *wt = t->private_data;
  63         unsigned char *a;
  64
  65         if (*wt->loaded < WAV_HEADER_LEN) {
  66                 t->ret = *wt->eof? -E_PREMATURE_END : 1;
  67                 return;
  68         }
  69         wt->channels = 2;
  70         wt->samplerate = 44100;
  71         a = (unsigned char*)wt->buf;
  72         t->ret = -E_NO_WAV_HEADER;
  73         if (a[0] != 'R' || a[1] != 'I' || a[2] != 'F' || a[3] != 'F')
  74                 return;
  75         wt->channels = (unsigned) a[22];
  76         wt->samplerate = a[24] + (a[25] << 8) + (a[26] << 16) + (a[27] << 24);
  77         *wt->loaded -= WAV_HEADER_LEN;
  78         memmove(wt->buf, wt->buf + WAV_HEADER_LEN, *wt->loaded);
  79         t->ret = -E_WAV_HEADER_SUCCESS;
  80         PARA_INFO_LOG("channels: %d, sample rate: %d\n", wt->channels, wt->samplerate);
  81 }
  82
  83 static void initial_delay_pre_select(struct sched *s, struct task *t)
  84 {
  85         struct initial_delay_task *dt = t->private_data;
  86         struct timeval diff;
  87
  88         t->ret = -E_NO_DELAY;
  89         if (!dt->start_time.tv_sec && !dt->start_time.tv_usec)
  90                 return;
  91         t->ret = -E_DELAY_TIMEOUT;
  92         if (tv_diff(now, &dt->start_time, &diff) > 0)
  93                 return;
  94         t->ret = 1;
  95         if (tv_diff(&s->timeout , &diff, NULL) > 0)
  96                 s->timeout = diff;
  97 }
  98
  99 void para_log(int ll, const char* fmt,...)
 100 {
 101         va_list argp;
 102
 103         if (ll < conf.loglevel_arg)
 104                 return;
 105         va_start(argp, fmt);
 106         vfprintf(stderr, fmt, argp);
 107         va_end(argp);
 108 }
 109
 110 static struct writer_node_group *check_args(void)
 111 {
 112         int i, ret = -E_WRITE_SYNTAX;
 113         struct writer_node_group *g = NULL;
 114
 115         if (conf.list_writers_given) {
 116                 char *msg = NULL;
 117                 FOR_EACH_WRITER(i) {
 118                         char *tmp = make_message("%s%s%s",
 119                                 i? msg : "",
 120                                 i? " " : "",
 121                                 writer_names[i]);
 122                         free(msg);
 123                         msg = tmp;
 124                 }
 125                 fprintf(stderr, "%s\n", msg);
 126                 free(msg);
 127                 exit(EXIT_SUCCESS);
 128         }
 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                 g = setup_default_wng();
 139                 ret = 1;
 140                 goto out;
 141         }
 142         g = wng_new(conf.writer_given);
 143         ret = -E_WRITE_SYNTAX;
 144         for (i = 0; i < conf.writer_given; i++) {
 145                 int writer_num;
 146                 g->writer_nodes[i].conf = check_writer_arg(
 147                         conf.writer_arg[i], &writer_num);
 148                 if (!g->writer_nodes[i].conf)
 149                         goto out;
 150                 g->writer_nodes[i].writer = &writers[writer_num];
 151         }
 152         ret = 1;
 153 out:
 154         if (ret > 0)
 155                 return g;
 156         free(g);
 157         return NULL;
 158 }
 159
 160 static void wng_event_handler(struct task *t)
 161 {
 162         struct writer_node_group *g = t->private_data;
 163
 164         PARA_INFO_LOG("%s\n", PARA_STRERROR(-t->ret));
 165         unregister_task(t);
 166         wng_close(g);
 167 }
 168
 169
 170 static void idt_event_handler(struct task *t)
 171 {
 172         int ret;
 173
 174         PARA_INFO_LOG("%s\n", PARA_STRERROR(-t->ret));
 175         unregister_task(t);
 176         wng->buf = sit.buf;
 177         wng->loaded = &sit.loaded;
 178         wng->input_eof = &sit.eof;
 179         wng->task.event_handler = wng_event_handler;
 180         wng->channels = &cwt.channels;
 181         wng->samplerate = &cwt.samplerate;
 182         ret = wng_open(wng);
 183         if (ret < 0) {
 184                 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
 185                 exit(EXIT_FAILURE);
 186         }
 187 }
 188
 189 static void cwt_event_handler(struct task *t)
 190 {
 191         if (t->ret != -E_NO_WAV_HEADER && t->ret != -E_WAV_HEADER_SUCCESS) {
 192                 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-t->ret));
 193                 exit(EXIT_FAILURE);
 194         }
 195         PARA_INFO_LOG("%s\n", PARA_STRERROR(-t->ret));
 196         unregister_task(t);
 197 //      if (t->ret == -E_WAV_HEADER_SUCCESS) {
 198 //              conf.channels_arg = cwt.channels;
 199 //              conf.sample_rate_arg = cwt.sample_rate;
 200 //      }
 201         idt.task.pre_select = initial_delay_pre_select;
 202         idt.task.private_data = &idt;
 203         idt.task.event_handler = idt_event_handler;
 204         sprintf(idt.task.status, "initial_delay");
 205         register_task(&idt.task);
 206 }
 207
 208 int main(int argc, char *argv[])
 209 {
 210         int ret = -E_WRITE_SYNTAX;
 211         struct sched s;
 212
 213         write_cmdline_parser(argc, argv, &conf);
 214         init_supported_writers();
 215
 216         wng = check_args();
 217         if (!wng)
 218                 goto out;
 219         stdin_set_defaults(&sit);
 220         if (conf.bufsize_given)
 221                 sit.bufsize = conf.bufsize_arg;
 222         sit.buf = para_malloc(sit.bufsize),
 223         register_task(&sit.task);
 224
 225         cwt.task.pre_select = check_wav_pre_select;
 226         cwt.task.private_data = &cwt;
 227         cwt.task.event_handler = cwt_event_handler;
 228         cwt.buf = sit.buf;
 229         cwt.loaded = &sit.loaded;
 230         cwt.eof = &sit.eof;
 231         sprintf(cwt.task.status, "check wav");
 232         register_task(&cwt.task);
 233
 234         s.default_timeout.tv_sec = 1;
 235         s.default_timeout.tv_usec = 0;
 236         ret = sched(&s);
 237
 238 out:
 239         if (ret < 0) {
 240                 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
 241                 ret = EXIT_FAILURE;
 242         } else
 243                 ret = EXIT_SUCCESS;
 244         return ret;
 245 }