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
  13 #include "para.h"
  14 #include "string.h"
  15 #include "write.cmdline.h"
  16 #include "list.h"
  17 #include "sched.h"
  18 #include "ggo.h"
  19 #include "stdin.h"
  20 #include "write.h"
  21 #include "write_common.h"
  22 #include "fd.h"
  23 #include "error.h"
  24
  25 INIT_WRITE_ERRLISTS;
  26
  27 /** Check if given buffer contains a valid wave header. */
  28 struct check_wav_task {
  29         /** The buffer to check. */
  30         char *buf;
  31         /** Number of bytes loaded in \a buf. */
  32         size_t *loaded;
  33         /** Non-zero if an error occurred or end of file was reached. */
  34         int *input_error;
  35         /** Number of channels specified in wav header given by \a buf. */
  36         unsigned channels;
  37         /** Sample rate specified in wav header given by \a buf. */
  38         unsigned samplerate;
  39         /** The task structure used by the scheduler. */
  40         struct task task;
  41 };
  42
  43 /** Delay writing until given time. */
  44 struct initial_delay_task {
  45         /** The time the first data should be written out. */
  46         struct timeval start_time;
  47         /** The task structure for this task. */
  48         struct task task;
  49 };
  50
  51 static struct write_args_info conf;
  52
  53 static struct stdin_task sit;
  54
  55 static struct check_wav_task the_check_wav_task;
  56 static struct initial_delay_task the_initial_delay_task;
  57
  58 static struct writer_node_group *wng;
  59
  60 /** Length of a standard wav header. */
  61 #define WAV_HEADER_LEN 44
  62
  63 /**
  64  * Test if audio buffer contains a valid wave header.
  65  *
  66  * \return If not, return -E_NO_WAV_HEADER, otherwise, return zero. If
  67  * there is less than WAV_HEADER_LEN bytes available, return one.
  68  */
  69 static void check_wav_pre_select(__a_unused struct sched *s, struct task *t)
  70 {
  71         struct check_wav_task *cwt = container_of(t, struct check_wav_task, task);
  72         unsigned char *a;
  73         int ret;
  74
  75         if (*cwt->loaded < WAV_HEADER_LEN) {
  76                 if (*cwt->input_error < 0)
  77                         t->error = *cwt->input_error;
  78                 return;
  79         }
  80         cwt->channels = 2;
  81         cwt->samplerate = 44100;
  82         a = (unsigned char*)cwt->buf;
  83         if (a[0] != 'R' || a[1] != 'I' || a[2] != 'F' || a[3] != 'F') {
  84                 PARA_NOTICE_LOG("wav header not found\n");
  85                 t->error = -E_NO_WAV_HEADER;
  86                 goto out;
  87         }
  88         cwt->channels = (unsigned) a[22];
  89         cwt->samplerate = a[24] + (a[25] << 8) + (a[26] << 16) + (a[27] << 24);
  90         *cwt->loaded -= WAV_HEADER_LEN;
  91         memmove(cwt->buf, cwt->buf + WAV_HEADER_LEN, *cwt->loaded);
  92         t->error = -E_WAV_HEADER_SUCCESS;
  93         PARA_INFO_LOG("channels: %d, sample rate: %d\n", cwt->channels, cwt->samplerate);
  94 out:
  95         wng->channels = &cwt->channels;
  96         wng->samplerate = &cwt->samplerate;
  97         ret = wng_open(wng);
  98         if (ret < 0)
  99                 t->error = ret;
 100         s->timeout.tv_sec = 0;
 101         s->timeout.tv_usec = 1;
 102 }
 103
 104 static void initial_delay_pre_select(struct sched *s, struct task *t)
 105 {
 106         struct initial_delay_task *idt = container_of(t, struct initial_delay_task, task);
 107         struct timeval diff;
 108
 109         if (!idt->start_time.tv_sec && !idt->start_time.tv_usec) {
 110                 t->error = -E_NO_DELAY;
 111                 goto register_check_wav;
 112         }
 113         if (tv_diff(now, &idt->start_time, &diff) > 0) {
 114                 t->error = -E_DELAY_TIMEOUT;
 115                 goto register_check_wav;
 116         }
 117         if (tv_diff(&s->timeout , &diff, NULL) > 0)
 118                 s->timeout = diff;
 119         return;
 120 register_check_wav:
 121         register_task(&the_check_wav_task.task);
 122         s->timeout.tv_sec = 0;
 123         s->timeout.tv_usec = 1;
 124 }
 125
 126 static int loglevel;
 127 INIT_STDERR_LOGGING(loglevel)
 128
 129 static struct writer_node_group *check_args(void)
 130 {
 131         int i, ret = -E_WRITE_SYNTAX;
 132         struct writer_node_group *g = NULL;
 133         struct initial_delay_task *idt = &the_initial_delay_task;
 134
 135         loglevel = get_loglevel_by_name(conf.loglevel_arg);
 136         if (conf.start_time_given) {
 137                 long unsigned sec, usec;
 138                 if (sscanf(conf.start_time_arg, "%lu:%lu",
 139                                 &sec, &usec) != 2)
 140                         goto out;
 141                 idt->start_time.tv_sec = sec;
 142                 idt->start_time.tv_usec = usec;
 143         }
 144         if (!conf.writer_given) {
 145                 g = setup_default_wng();
 146                 ret = 1;
 147                 goto out;
 148         }
 149         g = wng_new(conf.writer_given);
 150         ret = -E_WRITE_SYNTAX;
 151         for (i = 0; i < conf.writer_given; i++) {
 152                 int writer_num;
 153                 g->writer_nodes[i].conf = check_writer_arg(
 154                         conf.writer_arg[i], &writer_num);
 155                 if (!g->writer_nodes[i].conf)
 156                         goto out;
 157                 g->writer_nodes[i].writer_num = writer_num;
 158         }
 159         ret = 1;
 160 out:
 161         if (ret > 0)
 162                 return g;
 163         free(g);
 164         return NULL;
 165 }
 166
 167 __noreturn static void print_help_and_die(void)
 168 {
 169         int d = conf.detailed_help_given;
 170         const char **p = d? write_args_info_detailed_help
 171                 : write_args_info_help;
 172
 173         printf_or_die("%s\n\n", WRITE_CMDLINE_PARSER_PACKAGE "-"
 174                 WRITE_CMDLINE_PARSER_VERSION);
 175         printf_or_die("%s\n\n", write_args_info_usage);
 176         for (; *p; p++)
 177                 printf_or_die("%s\n", *p);
 178         print_writer_helps(d);
 179         exit(0);
 180 }
 181
 182 /**
 183  * Para_write's main function.
 184  *
 185  * \param argc The usual argument counter.
 186  * \param argv The usual argument vector.
 187  *
 188  * It registers the stdin task, the check_wav_task, the task for initial delay
 189  * and all tasks for actually writing out the stream.
 190  *
 191  * \return \p EXIT_SUCCESS or EXIT_FAILURE
 192  */
 193 int main(int argc, char *argv[])
 194 {
 195         int ret = -E_WRITE_SYNTAX;
 196         static struct sched s;
 197         struct check_wav_task *cwt = &the_check_wav_task;
 198         struct initial_delay_task *idt = &the_initial_delay_task;
 199
 200         writer_init();
 201         write_cmdline_parser(argc, argv, &conf);
 202         HANDLE_VERSION_FLAG("write", conf);
 203         if (conf.help_given || conf.detailed_help_given)
 204                 print_help_and_die();
 205
 206         wng = check_args();
 207         if (!wng)
 208                 goto out;
 209         stdin_set_defaults(&sit);
 210         ret = -ERRNO_TO_PARA_ERROR(EINVAL);
 211         if (conf.bufsize_arg < 0)
 212                 goto out;
 213         if (conf.bufsize_arg >= INT_MAX / 1024)
 214                 goto out;
 215         sit.bufsize = conf.bufsize_arg * 1024;
 216         sit.buf = para_malloc(sit.bufsize);
 217
 218         wng->bufp = &sit.buf;
 219         wng->loaded = &sit.loaded;
 220         wng->input_error = &sit.task.error;
 221
 222         register_task(&sit.task);
 223
 224         cwt->buf = sit.buf;
 225         cwt->loaded = &sit.loaded;
 226         cwt->input_error = &sit.task.error;
 227         sprintf(cwt->task.status, "check wav");
 228         cwt->task.pre_select = check_wav_pre_select;
 229
 230         idt->task.pre_select = initial_delay_pre_select;
 231         sprintf(idt->task.status, "initial_delay");
 232         register_task(&idt->task);
 233
 234         s.default_timeout.tv_sec = 10;
 235         s.default_timeout.tv_usec = 0;
 236         ret = schedule(&s);
 237         wng_close(wng);
 238 out:
 239         if (ret < 0) {
 240                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
 241                 exit(EXIT_FAILURE);
 242         }
 243         exit(EXIT_SUCCESS);
 244 }