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 "write.h"
  22 #include "write_common.h"
  23 #include "fd.h"
  24 #include "error.h"
  25 #include "buffer_tree.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 /** Delay writing until given time. */
  46 struct initial_delay_task {
  47         /** The time the first data should be written out. */
  48         struct timeval start_time;
  49         /** The task structure for this task. */
  50         struct task task;
  51 };
  52
  53 static struct write_args_info conf;
  54
  55 static struct stdin_task sit;
  56
  57 static struct check_wav_task the_check_wav_task;
  58 static struct initial_delay_task the_initial_delay_task;
  59
  60 static struct writer_node_group *wng;
  61
  62 /** Length of a standard wav header. */
  63 #define WAV_HEADER_LEN 44
  64
  65 /**
  66  * Test if audio buffer contains a valid wave header.
  67  *
  68  * \return If not, return -E_NO_WAV_HEADER, otherwise, return zero. If
  69  * there is less than WAV_HEADER_LEN bytes available, return one.
  70  */
  71 static void check_wav_pre_select(__a_unused struct sched *s, struct task *t)
  72 {
  73         struct check_wav_task *cwt = container_of(t, struct check_wav_task, task);
  74         unsigned char *a;
  75         int ret;
  76
  77         if (*cwt->loaded < WAV_HEADER_LEN) {
  78                 if (*cwt->input_error < 0)
  79                         t->error = *cwt->input_error;
  80                 return;
  81         }
  82         cwt->channels = 2;
  83         cwt->samplerate = 44100;
  84         a = (unsigned char*)cwt->buf;
  85         if (a[0] != 'R' || a[1] != 'I' || a[2] != 'F' || a[3] != 'F') {
  86                 PARA_NOTICE_LOG("wav header not found\n");
  87                 t->error = -E_NO_WAV_HEADER;
  88                 goto out;
  89         }
  90         cwt->channels = (unsigned) a[22];
  91         cwt->samplerate = a[24] + (a[25] << 8) + (a[26] << 16) + (a[27] << 24);
  92         *cwt->loaded -= WAV_HEADER_LEN;
  93         memmove(cwt->buf, cwt->buf + WAV_HEADER_LEN, *cwt->loaded);
  94         t->error = -E_WAV_HEADER_SUCCESS;
  95         PARA_INFO_LOG("channels: %d, sample rate: %d\n", cwt->channels, cwt->samplerate);
  96 out:
  97         wng->channels = &cwt->channels;
  98         wng->samplerate = &cwt->samplerate;
  99         ret = wng_open(wng);
 100         if (ret < 0)
 101                 t->error = ret;
 102         s->timeout.tv_sec = 0;
 103         s->timeout.tv_usec = 1;
 104 }
 105
 106 static void initial_delay_pre_select(struct sched *s, struct task *t)
 107 {
 108         struct initial_delay_task *idt = container_of(t, struct initial_delay_task, task);
 109         struct timeval diff;
 110
 111         if (!idt->start_time.tv_sec && !idt->start_time.tv_usec) {
 112                 t->error = -E_NO_DELAY;
 113                 goto register_check_wav;
 114         }
 115         if (tv_diff(now, &idt->start_time, &diff) > 0) {
 116                 t->error = -E_DELAY_TIMEOUT;
 117                 goto register_check_wav;
 118         }
 119         if (tv_diff(&s->timeout , &diff, NULL) > 0)
 120                 s->timeout = diff;
 121         return;
 122 register_check_wav:
 123         register_task(&the_check_wav_task.task);
 124         s->timeout.tv_sec = 0;
 125         s->timeout.tv_usec = 1;
 126 }
 127
 128 static int loglevel;
 129 INIT_STDERR_LOGGING(loglevel)
 130
 131 static struct writer_node_group *check_args(void)
 132 {
 133         int i, ret = -E_WRITE_SYNTAX;
 134         struct writer_node_group *g = NULL;
 135         struct initial_delay_task *idt = &the_initial_delay_task;
 136
 137         loglevel = get_loglevel_by_name(conf.loglevel_arg);
 138         if (conf.start_time_given) {
 139                 long unsigned sec, usec;
 140                 if (sscanf(conf.start_time_arg, "%lu:%lu",
 141                                 &sec, &usec) != 2)
 142                         goto out;
 143                 idt->start_time.tv_sec = sec;
 144                 idt->start_time.tv_usec = usec;
 145         }
 146         if (!conf.writer_given) {
 147                 g = setup_default_wng();
 148                 ret = 1;
 149                 goto out;
 150         }
 151         g = wng_new(conf.writer_given);
 152         ret = -E_WRITE_SYNTAX;
 153         for (i = 0; i < conf.writer_given; i++) {
 154                 int writer_num;
 155                 g->writer_nodes[i].conf = check_writer_arg(
 156                         conf.writer_arg[i], &writer_num);
 157                 if (!g->writer_nodes[i].conf)
 158                         goto out;
 159                 g->writer_nodes[i].writer_num = writer_num;
 160         }
 161         ret = 1;
 162 out:
 163         if (ret > 0)
 164                 return g;
 165         free(g);
 166         return NULL;
 167 }
 168
 169 __noreturn static void print_help_and_die(void)
 170 {
 171         int d = conf.detailed_help_given;
 172         const char **p = d? write_args_info_detailed_help
 173                 : write_args_info_help;
 174
 175         printf_or_die("%s\n\n", WRITE_CMDLINE_PARSER_PACKAGE "-"
 176                 WRITE_CMDLINE_PARSER_VERSION);
 177         printf_or_die("%s\n\n", write_args_info_usage);
 178         for (; *p; p++)
 179                 printf_or_die("%s\n", *p);
 180         print_writer_helps(d);
 181         exit(0);
 182 }
 183
 184 /*
 185  TODO: check wav, initial delay, multiple writers, non-default writers
 186  */
 187 static int main_btr(struct sched *s)
 188 {
 189         struct writer_node *wn = para_malloc(sizeof(*wn));
 190         struct writer *w = writers + DEFAULT_WRITER;
 191         int ret;
 192
 193         sit.btrn = btr_new_node("stdin", NULL /* stdin has no parent */, NULL);
 194         stdin_set_defaults(&sit);
 195         register_task(&sit.task);
 196
 197         wn->writer_num = DEFAULT_WRITER;
 198         wn->conf = writers[DEFAULT_WRITER].parse_config("-B");
 199         wn->btrn = btr_new_node("writer", sit.btrn, NULL);
 200         sprintf(wn->task.status, "some writer");
 201         w->open(wn);
 202         wn->task.post_select = w->post_select_btr;
 203         wn->task.pre_select = w->pre_select_btr;
 204         register_task(&wn->task);
 205
 206
 207
 208         s->default_timeout.tv_sec = 10;
 209         s->default_timeout.tv_usec = 50000;
 210         ret = schedule(s);
 211         w->close(wn);
 212         return ret;
 213 }
 214
 215 /**
 216  * Para_write's main function.
 217  *
 218  * \param argc The usual argument counter.
 219  * \param argv The usual argument vector.
 220  *
 221  * It registers the stdin task, the check_wav_task, the task for initial delay
 222  * and all tasks for actually writing out the stream.
 223  *
 224  * \return \p EXIT_SUCCESS or EXIT_FAILURE
 225  */
 226 int main(int argc, char *argv[])
 227 {
 228         int ret = -E_WRITE_SYNTAX;
 229         static struct sched s;
 230         struct check_wav_task *cwt = &the_check_wav_task;
 231         struct initial_delay_task *idt = &the_initial_delay_task;
 232
 233         writer_init();
 234         write_cmdline_parser(argc, argv, &conf);
 235         HANDLE_VERSION_FLAG("write", conf);
 236         if (conf.help_given || conf.detailed_help_given)
 237                 print_help_and_die();
 238
 239         if (conf.buffer_tree_given) {
 240                 ret = main_btr(&s);
 241                 goto out;
 242         }
 243         wng = check_args();
 244         if (!wng)
 245                 goto out;
 246         stdin_set_defaults(&sit);
 247         ret = -ERRNO_TO_PARA_ERROR(EINVAL);
 248         if (conf.bufsize_arg < 0)
 249                 goto out;
 250         if (conf.bufsize_arg >= INT_MAX / 1024)
 251                 goto out;
 252         sit.bufsize = conf.bufsize_arg * 1024;
 253         sit.buf = para_malloc(sit.bufsize);
 254
 255         wng->bufp = &sit.buf;
 256         wng->loaded = &sit.loaded;
 257         wng->input_error = &sit.task.error;
 258
 259         register_task(&sit.task);
 260
 261         cwt->buf = sit.buf;
 262         cwt->loaded = &sit.loaded;
 263         cwt->input_error = &sit.task.error;
 264         sprintf(cwt->task.status, "check wav");
 265         cwt->task.pre_select = check_wav_pre_select;
 266
 267         idt->task.pre_select = initial_delay_pre_select;
 268         sprintf(idt->task.status, "initial_delay");
 269         register_task(&idt->task);
 270
 271         s.default_timeout.tv_sec = 10;
 272         s.default_timeout.tv_usec = 0;
 273         ret = schedule(&s);
 274         wng_close(wng);
 275 out:
 276         if (ret < 0) {
 277                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
 278                 exit(EXIT_FAILURE);
 279         }
 280         exit(EXIT_SUCCESS);
 281 }