write.c

   1 /*
   2  * Copyright (C) 2005-2010 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 enum check_wav_state {
  30         CWS_NEED_HEADER,
  31         CWS_HAVE_HEADER,
  32         CWS_NO_HEADER,
  33 };
  34
  35 /* Information extracted from the wav header. */
  36 struct check_wav_task {
  37         int state;
  38         /** Number of channels. */
  39         unsigned channels;
  40         unsigned sample_rate;
  41         unsigned sample_format;
  42         /** The task structure used by the scheduler. */
  43         struct task task;
  44         struct btr_node *btrn;
  45         size_t min_iqs;
  46 };
  47
  48 static struct write_args_info conf;
  49
  50 static struct stdin_task sit;
  51
  52 /** Length of a standard wav header. */
  53 #define WAV_HEADER_LEN 44
  54
  55 static void check_wav_pre_select(struct sched *s, struct task *t)
  56 {
  57         struct check_wav_task *cwt = container_of(t, struct check_wav_task, task);
  58         int ret;
  59
  60         ret = btr_node_status(cwt->btrn, cwt->min_iqs, BTR_NT_INTERNAL);
  61         if (ret != 0)
  62                 sched_min_delay(s);
  63 }
  64
  65 #define HANDLE_EXEC(_cmd) \
  66         if (!strcmp(cmd, #_cmd)) { \
  67                 if (!conf._cmd ## _given && cwt->state == CWS_NEED_HEADER) \
  68                         return -E_BTR_NAVAIL; \
  69                 *result = make_message("%d", cwt->state == CWS_NO_HEADER || conf._cmd ## _given? \
  70                         conf._cmd ## _arg : cwt->_cmd); \
  71                 return 1; \
  72         } \
  73
  74
  75 static int check_wav_exec(struct btr_node *btrn, const char *cmd, char **result)
  76 {
  77         struct check_wav_task *cwt = btr_context(btrn);
  78
  79         HANDLE_EXEC(sample_rate);
  80         HANDLE_EXEC(channels);
  81         HANDLE_EXEC(sample_format);
  82         return -ERRNO_TO_PARA_ERROR(ENOTSUP);
  83 }
  84
  85 static void check_wav_post_select(__a_unused struct sched *s, struct task *t)
  86 {
  87         struct check_wav_task *cwt = container_of(t, struct check_wav_task, task);
  88         struct btr_node *btrn = cwt->btrn;
  89         unsigned char *a;
  90         size_t sz;
  91         int ret;
  92         uint16_t bps; /* bits per sample */
  93         const char *sample_formats[] = {SAMPLE_FORMATS};
  94
  95         t->error = 0;
  96         ret = btr_node_status(btrn, cwt->min_iqs, BTR_NT_INTERNAL);
  97         if (ret <= 0)
  98                 goto out;
  99         if (cwt->state != CWS_NEED_HEADER)
 100                 goto pushdown;
 101         btr_merge(btrn, cwt->min_iqs);
 102         sz = btr_next_buffer(btrn, (char **)&a);
 103         if (sz < cwt->min_iqs) /* file size less than WAV_HEADER_SIZE */
 104                 goto pushdown;
 105         cwt->min_iqs = 0;
 106         /*
 107          * The default byte ordering assumed for WAVE data files is
 108          * little-endian. Files written using the big-endian byte ordering
 109          * scheme have the identifier RIFX instead of RIFF.
 110          */
 111         if (a[0] != 'R' || a[1] != 'I' || a[2] != 'F' ||
 112                         (a[3] != 'F' && a[3] != 'X')) {
 113                 PARA_NOTICE_LOG("wav header not found\n");
 114                 cwt->state = CWS_NO_HEADER;
 115                 sprintf(t->status, "check wav: no header");
 116                 goto out;
 117         }
 118         PARA_INFO_LOG("found wav header\n");
 119         cwt->state = CWS_HAVE_HEADER;
 120         sprintf(t->status, "check wav: have header");
 121         cwt->channels = (unsigned) a[22];
 122         cwt->sample_rate = a[24] + (a[25] << 8) + (a[26] << 16) + (a[27] << 24);
 123         bps = a[34] + ((unsigned)a[35] << 8);
 124         if (bps != 8 && bps != 16) {
 125                 PARA_WARNING_LOG("%u bps not supported, assuming 16\n", bps);
 126                 bps = 16;
 127         }
 128         /*
 129          * 8-bit samples are stored as unsigned bytes, ranging from 0 to 255.
 130          * 16-bit samples are stored as 2's-complement signed integers, ranging
 131          * from -32768 to 32767.
 132          */
 133         if (bps == 8)
 134                 cwt->sample_format = SF_U8;
 135         else
 136                 cwt->sample_format = (a[3] == 'F')? SF_S16_LE : SF_S16_BE;
 137         PARA_NOTICE_LOG("%dHz, %s, %s\n", cwt->sample_rate,
 138                 cwt->channels == 1? "mono" : "stereo",
 139                 sample_formats[cwt->sample_format]);
 140         btr_consume(btrn, WAV_HEADER_LEN);
 141 pushdown:
 142         btr_pushdown(btrn);
 143 out:
 144         t->error = ret;
 145         if (ret < 0)
 146                 btr_remove_node(btrn);
 147 }
 148
 149 static int loglevel;
 150 INIT_STDERR_LOGGING(loglevel)
 151
 152 __noreturn static void print_help_and_die(void)
 153 {
 154         int d = conf.detailed_help_given;
 155         const char **p = d? write_args_info_detailed_help
 156                 : write_args_info_help;
 157
 158         printf_or_die("%s\n\n", WRITE_CMDLINE_PARSER_PACKAGE "-"
 159                 WRITE_CMDLINE_PARSER_VERSION);
 160         printf_or_die("%s\n\n", write_args_info_usage);
 161         for (; *p; p++)
 162                 printf_or_die("%s\n", *p);
 163         print_writer_helps(d);
 164         exit(0);
 165 }
 166
 167 static int main_btr(struct sched *s)
 168 {
 169         int i, ret;
 170         struct check_wav_task _cwt, *cwt = &_cwt;
 171         struct writer_node *wns;
 172
 173         loglevel = get_loglevel_by_name(conf.loglevel_arg);
 174         sit.btrn = btr_new_node(&(struct btr_node_description)
 175                 EMBRACE(.name = "stdin"));
 176         stdin_set_defaults(&sit);
 177         register_task(&sit.task);
 178
 179         cwt->state = CWS_NEED_HEADER;
 180         cwt->min_iqs = WAV_HEADER_LEN;
 181         cwt->btrn = btr_new_node(&(struct btr_node_description)
 182                 EMBRACE(.name = "check_wav", .parent = sit.btrn,
 183                 .handler = check_wav_exec, .context = cwt));
 184         sprintf(cwt->task.status, "check_wav");
 185         cwt->task.pre_select = check_wav_pre_select;
 186         cwt->task.post_select = check_wav_post_select;
 187         cwt->task.error = 0;
 188         register_task(&cwt->task);
 189
 190         ret = -E_WRITE_SYNTAX;
 191         if (!conf.writer_given) {
 192                 i = 0;
 193                 wns = para_calloc(sizeof(*wns));
 194                 ret = setup_writer_node(NULL, cwt->btrn, wns);
 195                 if (ret < 0)
 196                         goto out;
 197                 i = 1;
 198         } else {
 199                 wns = para_calloc(conf.writer_given * sizeof(*wns));
 200                 for (i = 0; i < conf.writer_given; i++) {
 201                         ret = setup_writer_node(conf.writer_arg[i],
 202                                 cwt->btrn, wns + i);
 203                         if (ret < 0)
 204                                 goto out;
 205                 }
 206         }
 207
 208         s->default_timeout.tv_sec = 10;
 209         s->default_timeout.tv_usec = 50000;
 210         ret = schedule(s);
 211 out:
 212         for (i--; i >= 0; i--) {
 213                 struct writer_node *wn = wns + i;
 214                 struct writer *w = writers + wn->writer_num;
 215
 216                 w->close(wn);
 217                 btr_free_node(wn->btrn);
 218                 free(wn->conf);
 219         }
 220         free(wns);
 221         btr_free_node(cwt->btrn);
 222         return ret;
 223 }
 224
 225 /**
 226  * Para_write's main function.
 227  *
 228  * \param argc The usual argument counter.
 229  * \param argv The usual argument vector.
 230  *
 231  * It sets up and starts the tasks and the buffer tree nodes determined by
 232  * command line options.
 233  *
 234  * \return \p EXIT_SUCCESS or EXIT_FAILURE
 235  */
 236 int main(int argc, char *argv[])
 237 {
 238         int ret = -E_WRITE_SYNTAX;
 239         static struct sched s;
 240
 241         writer_init();
 242         write_cmdline_parser(argc, argv, &conf);
 243         HANDLE_VERSION_FLAG("write", conf);
 244         if (conf.help_given || conf.detailed_help_given)
 245                 print_help_and_die();
 246
 247         ret = main_btr(&s);
 248         if (ret < 0) {
 249                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
 250                 exit(EXIT_FAILURE);
 251         }
 252         exit(EXIT_SUCCESS);
 253 }