write.c

   1 /*
   2  * Copyright (C) 2005-2009 Andre Noll <maan@systemlinux.org>
   3  *
   4  * Licensed under the GPL v2. For licencing details see COPYING.
   5  */
   6
   7 /** \file write.c Paraslash's standalone wav/raw player. */
   8
   9 #include <regex.h>
  10 #include <sys/types.h>
  11 #include <dirent.h>
  12 #include <stdbool.h>
  13
  14 #include "para.h"
  15 #include "string.h"
  16 #include "write.cmdline.h"
  17 #include "list.h"
  18 #include "sched.h"
  19 #include "ggo.h"
  20 #include "stdin.h"
  21 #include "buffer_tree.h"
  22 #include "write.h"
  23 #include "write_common.h"
  24 #include "fd.h"
  25 #include "error.h"
  26
  27 INIT_WRITE_ERRLISTS;
  28
  29 /** Check if given buffer contains a valid wave header. */
  30 struct check_wav_task {
  31         /** The buffer to check. */
  32         char *buf;
  33         /** Number of bytes loaded in \a buf. */
  34         size_t *loaded;
  35         /** Non-zero if an error occurred or end of file was reached. */
  36         int *input_error;
  37         /** Number of channels specified in wav header given by \a buf. */
  38         unsigned channels;
  39         /** Sample rate specified in wav header given by \a buf. */
  40         unsigned samplerate;
  41         /** The task structure used by the scheduler. */
  42         struct task task;
  43 };
  44
  45 enum check_wav_state {
  46         CWS_NEED_HEADER,
  47         CWS_HAVE_HEADER,
  48         CWS_NO_HEADER,
  49 };
  50
  51 struct check_wav_task_btr {
  52         int state;
  53         /** Number of channels specified in wav header given by \a buf. */
  54         unsigned channels;
  55         /** Sample rate specified in wav header given by \a buf. */
  56         unsigned samplerate;
  57         /** The task structure used by the scheduler. */
  58         struct task task;
  59         struct btr_node *btrn;
  60 };
  61
  62 /** Delay writing until given time. */
  63 struct initial_delay_task {
  64         /** The time the first data should be written out. */
  65         struct timeval start_time;
  66         /** The task structure for this task. */
  67         struct task task;
  68 };
  69
  70 static struct write_args_info conf;
  71
  72 static struct stdin_task sit;
  73
  74 static struct check_wav_task the_check_wav_task;
  75 static struct initial_delay_task the_initial_delay_task;
  76
  77 static struct writer_node_group *wng;
  78
  79 /** Length of a standard wav header. */
  80 #define WAV_HEADER_LEN 44
  81
  82 /**
  83  * Test if audio buffer contains a valid wave header.
  84  *
  85  * \return If not, return -E_NO_WAV_HEADER, otherwise, return zero. If
  86  * there is less than WAV_HEADER_LEN bytes available, return one.
  87  */
  88 static void check_wav_pre_select(__a_unused struct sched *s, struct task *t)
  89 {
  90         struct check_wav_task *cwt = container_of(t, struct check_wav_task, task);
  91         unsigned char *a;
  92         int ret;
  93
  94         if (*cwt->loaded < WAV_HEADER_LEN) {
  95                 if (*cwt->input_error < 0)
  96                         t->error = *cwt->input_error;
  97                 return;
  98         }
  99         cwt->channels = 2;
 100         cwt->samplerate = 44100;
 101         a = (unsigned char*)cwt->buf;
 102         if (a[0] != 'R' || a[1] != 'I' || a[2] != 'F' || a[3] != 'F') {
 103                 PARA_NOTICE_LOG("wav header not found\n");
 104                 t->error = -E_NO_WAV_HEADER;
 105                 goto out;
 106         }
 107         cwt->channels = (unsigned) a[22];
 108         cwt->samplerate = a[24] + (a[25] << 8) + (a[26] << 16) + (a[27] << 24);
 109         *cwt->loaded -= WAV_HEADER_LEN;
 110         memmove(cwt->buf, cwt->buf + WAV_HEADER_LEN, *cwt->loaded);
 111         t->error = -E_WAV_HEADER_SUCCESS;
 112         PARA_INFO_LOG("channels: %d, sample rate: %d\n", cwt->channels, cwt->samplerate);
 113 out:
 114         wng->channels = &cwt->channels;
 115         wng->samplerate = &cwt->samplerate;
 116         ret = wng_open(wng);
 117         if (ret < 0)
 118                 t->error = ret;
 119         s->timeout.tv_sec = 0;
 120         s->timeout.tv_usec = 1;
 121 }
 122
 123 static void check_wav_pre_select_btr(__a_unused struct sched *s, struct task *t)
 124 {
 125         struct check_wav_task_btr *cwt = container_of(t, struct check_wav_task_btr, task);
 126
 127         if (btr_get_input_queue_size(cwt->btrn) < WAV_HEADER_LEN)
 128                 return;
 129         s->timeout.tv_sec = 0;
 130         s->timeout.tv_usec = 1;
 131 }
 132
 133 static int check_wav_exec(struct btr_node *btrn, const char *cmd, char **result)
 134 {
 135         struct check_wav_task_btr *cwt = btr_context(btrn);
 136
 137
 138         if (!strcmp(cmd, "samplerate")) {
 139                 if (cwt->state != CWS_HAVE_HEADER)
 140                         return -ERRNO_TO_PARA_ERROR(ENAVAIL);
 141                 *result = make_message("%d", cwt->samplerate);
 142                 return 1;
 143         }
 144         if (!strcmp(cmd, "channels")) {
 145                 if (cwt->state != CWS_HAVE_HEADER)
 146                         return -ERRNO_TO_PARA_ERROR(ENAVAIL);
 147                 *result = make_message("%d", cwt->channels);
 148                 return 1;
 149         }
 150         return -ERRNO_TO_PARA_ERROR(ENOTSUP);
 151 }
 152
 153 static void check_wav_post_select_btr(__a_unused struct sched *s, struct task *t)
 154 {
 155         struct check_wav_task_btr *cwt = container_of(t, struct check_wav_task_btr, task);
 156         unsigned char *a;
 157         size_t sz = btr_get_input_queue_size(cwt->btrn);
 158
 159         t->error = 0;
 160         if (cwt->state != CWS_NEED_HEADER)
 161                 goto out;
 162         if (sz < WAV_HEADER_LEN) {
 163                 if (!btr_no_parent(cwt->btrn))
 164                         return;
 165                 if (sz != 0) {
 166                         cwt->state = CWS_NO_HEADER;
 167                         goto out;
 168                 }
 169                 t->error = -E_WRITE_EOF;
 170                 goto err;
 171         }
 172         cwt->channels = 2;
 173         cwt->samplerate = 44100;
 174         btr_next_buffer(cwt->btrn, (char **)&a);
 175         if (a[0] != 'R' || a[1] != 'I' || a[2] != 'F' || a[3] != 'F') {
 176                 PARA_NOTICE_LOG("wav header not found\n");
 177                 cwt->state = CWS_NO_HEADER;
 178                 sprintf(t->status, "check wav: no header");
 179                 goto consume;
 180         }
 181         PARA_INFO_LOG("found wav header\n");
 182         cwt->state = CWS_HAVE_HEADER;
 183         sprintf(t->status, "check wav: have header");
 184         cwt->channels = (unsigned) a[22];
 185         cwt->samplerate = a[24] + (a[25] << 8) + (a[26] << 16) + (a[27] << 24);
 186 consume:
 187         PARA_INFO_LOG("channels: %d, sample rate: %d\n", cwt->channels, cwt->samplerate);
 188         btr_consume(cwt->btrn, WAV_HEADER_LEN);
 189 out:
 190         if (sz) {
 191                 btr_pushdown(cwt->btrn);
 192                 s->timeout.tv_sec = 0;
 193                 s->timeout.tv_usec = 1;
 194         } else {
 195                 if (btr_no_parent(cwt->btrn))
 196                         t->error = -E_WRITE_EOF;
 197         }
 198 err:
 199         if (t->error < 0)
 200                 btr_del_node(cwt->btrn);
 201 }
 202
 203 static void initial_delay_pre_select(struct sched *s, struct task *t)
 204 {
 205         struct initial_delay_task *idt = container_of(t, struct initial_delay_task, task);
 206         struct timeval diff;
 207
 208         if (!idt->start_time.tv_sec && !idt->start_time.tv_usec) {
 209                 t->error = -E_NO_DELAY;
 210                 goto register_check_wav;
 211         }
 212         if (tv_diff(now, &idt->start_time, &diff) > 0) {
 213                 t->error = -E_DELAY_TIMEOUT;
 214                 goto register_check_wav;
 215         }
 216         if (tv_diff(&s->timeout , &diff, NULL) > 0)
 217                 s->timeout = diff;
 218         return;
 219 register_check_wav:
 220         register_task(&the_check_wav_task.task);
 221         s->timeout.tv_sec = 0;
 222         s->timeout.tv_usec = 1;
 223 }
 224
 225 static int loglevel;
 226 INIT_STDERR_LOGGING(loglevel)
 227
 228 static struct writer_node_group *check_args(void)
 229 {
 230         int i, ret = -E_WRITE_SYNTAX;
 231         struct writer_node_group *g = NULL;
 232         struct initial_delay_task *idt = &the_initial_delay_task;
 233
 234         loglevel = get_loglevel_by_name(conf.loglevel_arg);
 235         if (conf.start_time_given) {
 236                 long unsigned sec, usec;
 237                 if (sscanf(conf.start_time_arg, "%lu:%lu",
 238                                 &sec, &usec) != 2)
 239                         goto out;
 240                 idt->start_time.tv_sec = sec;
 241                 idt->start_time.tv_usec = usec;
 242         }
 243         if (!conf.writer_given) {
 244                 g = setup_default_wng();
 245                 ret = 1;
 246                 goto out;
 247         }
 248         g = wng_new(conf.writer_given);
 249         ret = -E_WRITE_SYNTAX;
 250         for (i = 0; i < conf.writer_given; i++) {
 251                 int writer_num;
 252                 g->writer_nodes[i].conf = check_writer_arg(
 253                         conf.writer_arg[i], &writer_num);
 254                 if (!g->writer_nodes[i].conf)
 255                         goto out;
 256                 g->writer_nodes[i].writer_num = writer_num;
 257         }
 258         ret = 1;
 259 out:
 260         if (ret > 0)
 261                 return g;
 262         free(g);
 263         return NULL;
 264 }
 265
 266 __noreturn static void print_help_and_die(void)
 267 {
 268         int d = conf.detailed_help_given;
 269         const char **p = d? write_args_info_detailed_help
 270                 : write_args_info_help;
 271
 272         printf_or_die("%s\n\n", WRITE_CMDLINE_PARSER_PACKAGE "-"
 273                 WRITE_CMDLINE_PARSER_VERSION);
 274         printf_or_die("%s\n\n", write_args_info_usage);
 275         for (; *p; p++)
 276                 printf_or_die("%s\n", *p);
 277         print_writer_helps(d);
 278         exit(0);
 279 }
 280
 281 /*
 282  TODO: check wav, initial delay, multiple writers, non-default writers
 283  */
 284 static int main_btr(struct sched *s)
 285 {
 286         int i, ret;
 287         struct check_wav_task_btr _cwt, *cwt = &_cwt;
 288         struct writer_node **wns;
 289
 290         sit.btrn = btr_new_node("stdin", NULL /* stdin has no parent */, NULL, NULL);
 291         stdin_set_defaults(&sit);
 292         register_task(&sit.task);
 293
 294         cwt->state = CWS_NEED_HEADER;
 295         cwt->btrn = btr_new_node("check wav", sit.btrn, check_wav_exec, cwt);
 296         sprintf(cwt->task.status, "check wav");
 297         cwt->task.pre_select = check_wav_pre_select_btr;
 298         cwt->task.post_select = check_wav_post_select_btr;
 299         cwt->task.error = 0;
 300         register_task(&cwt->task);
 301
 302         PARA_CRIT_LOG("writers:\n");
 303
 304         ret = -E_WRITE_SYNTAX;
 305         if (!conf.writer_given) {
 306                 i = 0;
 307                 wns = para_malloc(sizeof(*wns));
 308                 wns[0] = setup_writer_node(NULL, cwt->btrn);
 309                 if (!wns[0])
 310                         goto out;
 311         } else {
 312                 wns = para_malloc(conf.writer_given * sizeof(*wns));
 313                 for (i = 0; i < conf.writer_given; i++) {
 314                         PARA_CRIT_LOG("i: %d\n", i);
 315                         wns[i] = setup_writer_node(conf.writer_arg[i],
 316                                 cwt->btrn);
 317                         if (!wns[i])
 318                                 goto out;
 319                 }
 320         }
 321
 322         s->default_timeout.tv_sec = 10;
 323         s->default_timeout.tv_usec = 50000;
 324         ret = schedule(s);
 325 out:
 326         for (i--; i >= 0; i--) {
 327                 struct writer_node *wn = wns[i];
 328                 struct writer *w = writers + wn->writer_num;
 329                 w->close(wn);
 330                 free(wn->conf); /* FIXME should call gengetopt cleanup funtion */
 331                 free(wn);
 332         }
 333         free(wns);
 334         return ret;
 335 }
 336
 337 /**
 338  * Para_write's main function.
 339  *
 340  * \param argc The usual argument counter.
 341  * \param argv The usual argument vector.
 342  *
 343  * It registers the stdin task, the check_wav_task, the task for initial delay
 344  * and all tasks for actually writing out the stream.
 345  *
 346  * \return \p EXIT_SUCCESS or EXIT_FAILURE
 347  */
 348 int main(int argc, char *argv[])
 349 {
 350         int ret = -E_WRITE_SYNTAX;
 351         static struct sched s;
 352         struct check_wav_task *cwt = &the_check_wav_task;
 353         struct initial_delay_task *idt = &the_initial_delay_task;
 354
 355         writer_init();
 356         write_cmdline_parser(argc, argv, &conf);
 357         HANDLE_VERSION_FLAG("write", conf);
 358         if (conf.help_given || conf.detailed_help_given)
 359                 print_help_and_die();
 360
 361         if (conf.buffer_tree_given) {
 362                 ret = main_btr(&s);
 363                 goto out;
 364         }
 365         wng = check_args();
 366         if (!wng)
 367                 goto out;
 368         stdin_set_defaults(&sit);
 369         ret = -ERRNO_TO_PARA_ERROR(EINVAL);
 370         if (conf.bufsize_arg < 0)
 371                 goto out;
 372         if (conf.bufsize_arg >= INT_MAX / 1024)
 373                 goto out;
 374         sit.bufsize = conf.bufsize_arg * 1024;
 375         sit.buf = para_malloc(sit.bufsize);
 376
 377         wng->bufp = &sit.buf;
 378         wng->loaded = &sit.loaded;
 379         wng->input_error = &sit.task.error;
 380
 381         register_task(&sit.task);
 382
 383         cwt->buf = sit.buf;
 384         cwt->loaded = &sit.loaded;
 385         cwt->input_error = &sit.task.error;
 386         sprintf(cwt->task.status, "check wav");
 387         cwt->task.pre_select = check_wav_pre_select;
 388
 389         idt->task.pre_select = initial_delay_pre_select;
 390         sprintf(idt->task.status, "initial_delay");
 391         register_task(&idt->task);
 392
 393         s.default_timeout.tv_sec = 10;
 394         s.default_timeout.tv_usec = 0;
 395         ret = schedule(&s);
 396         wng_close(wng);
 397 out:
 398         if (ret < 0) {
 399                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
 400                 exit(EXIT_FAILURE);
 401         }
 402         exit(EXIT_SUCCESS);
 403 }