2 * Copyright (C) 2005-2009 Andre Noll <maan@systemlinux.org>
4 * Licensed under the GPL v2. For licencing details see COPYING.
7 /** \file write.c Paraslash's standalone wav/raw player. */
10 #include <sys/types.h>
16 #include "write.cmdline.h"
21 #include "buffer_tree.h"
23 #include "write_common.h"
29 /** Check if given buffer contains a valid wave header. */
30 struct check_wav_task {
31 /** The buffer to check. */
33 /** Number of bytes loaded in \a buf. */
35 /** Non-zero if an error occurred or end of file was reached. */
37 /** Number of channels specified in wav header given by \a buf. */
39 /** Sample rate specified in wav header given by \a buf. */
41 /** The task structure used by the scheduler. */
45 enum check_wav_state {
51 struct check_wav_task_btr {
53 /** Number of channels specified in wav header given by \a buf. */
55 /** Sample rate specified in wav header given by \a buf. */
57 /** The task structure used by the scheduler. */
59 struct btr_node *btrn;
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. */
70 static struct write_args_info conf;
72 static struct stdin_task sit;
74 static struct check_wav_task the_check_wav_task;
75 static struct initial_delay_task the_initial_delay_task;
77 static struct writer_node_group *wng;
79 /** Length of a standard wav header. */
80 #define WAV_HEADER_LEN 44
83 * Test if audio buffer contains a valid wave header.
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.
88 static void check_wav_pre_select(__a_unused struct sched *s, struct task *t)
90 struct check_wav_task *cwt = container_of(t, struct check_wav_task, task);
94 if (*cwt->loaded < WAV_HEADER_LEN) {
95 if (*cwt->input_error < 0)
96 t->error = *cwt->input_error;
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;
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);
114 wng->channels = &cwt->channels;
115 wng->samplerate = &cwt->samplerate;
119 s->timeout.tv_sec = 0;
120 s->timeout.tv_usec = 1;
123 static void check_wav_pre_select_btr(__a_unused struct sched *s, struct task *t)
125 struct check_wav_task_btr *cwt = container_of(t, struct check_wav_task_btr, task);
127 if (btr_get_input_queue_size(cwt->btrn) < WAV_HEADER_LEN)
129 s->timeout.tv_sec = 0;
130 s->timeout.tv_usec = 1;
133 static int check_wav_exec(struct btr_node *btrn, const char *cmd, char **result)
135 struct check_wav_task_btr *cwt = btr_context(btrn);
137 if (!strcmp(cmd, "samplerate")) {
138 if (cwt->state != CWS_HAVE_HEADER)
139 return -ERRNO_TO_PARA_ERROR(ENAVAIL);
140 *result = make_message("%d", cwt->samplerate);
143 if (!strcmp(cmd, "channels")) {
144 if (cwt->state != CWS_HAVE_HEADER)
145 return -ERRNO_TO_PARA_ERROR(ENAVAIL);
146 *result = make_message("%d", cwt->samplerate);
149 return -ERRNO_TO_PARA_ERROR(ENOTSUP);
152 static void check_wav_post_select_btr(__a_unused struct sched *s, struct task *t)
154 struct check_wav_task_btr *cwt = container_of(t, struct check_wav_task_btr, task);
156 size_t sz = btr_get_input_queue_size(cwt->btrn);
159 if (cwt->state != CWS_NEED_HEADER)
161 if (sz < WAV_HEADER_LEN) {
162 if (!btr_no_parent(cwt->btrn))
165 cwt->state = CWS_NO_HEADER;
168 t->error = -E_WRITE_EOF;
172 cwt->samplerate = 44100;
173 btr_next_buffer(cwt->btrn, (char **)&a);
174 if (a[0] != 'R' || a[1] != 'I' || a[2] != 'F' || a[3] != 'F') {
175 PARA_NOTICE_LOG("wav header not found\n");
176 cwt->state = CWS_NO_HEADER;
177 sprintf(t->status, "check wav: no header");
180 PARA_INFO_LOG("found wav header\n");
181 cwt->state = CWS_HAVE_HEADER;
182 sprintf(t->status, "check wav: have header");
183 cwt->channels = (unsigned) a[22];
184 cwt->samplerate = a[24] + (a[25] << 8) + (a[26] << 16) + (a[27] << 24);
186 PARA_INFO_LOG("channels: %d, sample rate: %d\n", cwt->channels, cwt->samplerate);
187 btr_consume(cwt->btrn, WAV_HEADER_LEN);
190 btr_pushdown(cwt->btrn);
191 s->timeout.tv_sec = 0;
192 s->timeout.tv_usec = 1;
194 if (btr_no_parent(cwt->btrn))
195 t->error = -E_WRITE_EOF;
199 btr_del_node(cwt->btrn);
202 static void initial_delay_pre_select(struct sched *s, struct task *t)
204 struct initial_delay_task *idt = container_of(t, struct initial_delay_task, task);
207 if (!idt->start_time.tv_sec && !idt->start_time.tv_usec) {
208 t->error = -E_NO_DELAY;
209 goto register_check_wav;
211 if (tv_diff(now, &idt->start_time, &diff) > 0) {
212 t->error = -E_DELAY_TIMEOUT;
213 goto register_check_wav;
215 if (tv_diff(&s->timeout , &diff, NULL) > 0)
219 register_task(&the_check_wav_task.task);
220 s->timeout.tv_sec = 0;
221 s->timeout.tv_usec = 1;
225 INIT_STDERR_LOGGING(loglevel)
227 static struct writer_node_group *check_args(void)
229 int i, ret = -E_WRITE_SYNTAX;
230 struct writer_node_group *g = NULL;
231 struct initial_delay_task *idt = &the_initial_delay_task;
233 loglevel = get_loglevel_by_name(conf.loglevel_arg);
234 if (conf.start_time_given) {
235 long unsigned sec, usec;
236 if (sscanf(conf.start_time_arg, "%lu:%lu",
239 idt->start_time.tv_sec = sec;
240 idt->start_time.tv_usec = usec;
242 if (!conf.writer_given) {
243 g = setup_default_wng();
247 g = wng_new(conf.writer_given);
248 ret = -E_WRITE_SYNTAX;
249 for (i = 0; i < conf.writer_given; i++) {
251 g->writer_nodes[i].conf = check_writer_arg(
252 conf.writer_arg[i], &writer_num);
253 if (!g->writer_nodes[i].conf)
255 g->writer_nodes[i].writer_num = writer_num;
265 __noreturn static void print_help_and_die(void)
267 int d = conf.detailed_help_given;
268 const char **p = d? write_args_info_detailed_help
269 : write_args_info_help;
271 printf_or_die("%s\n\n", WRITE_CMDLINE_PARSER_PACKAGE "-"
272 WRITE_CMDLINE_PARSER_VERSION);
273 printf_or_die("%s\n\n", write_args_info_usage);
275 printf_or_die("%s\n", *p);
276 print_writer_helps(d);
281 TODO: check wav, initial delay, multiple writers, non-default writers
283 static int main_btr(struct sched *s)
286 struct check_wav_task_btr _cwt, *cwt = &_cwt;
287 struct writer_node **wns;
289 sit.btrn = btr_new_node("stdin", NULL /* stdin has no parent */, NULL, NULL);
290 stdin_set_defaults(&sit);
291 register_task(&sit.task);
293 cwt->state = CWS_NEED_HEADER;
294 cwt->btrn = btr_new_node("check wav", sit.btrn, check_wav_exec, cwt);
295 sprintf(cwt->task.status, "check wav");
296 cwt->task.pre_select = check_wav_pre_select_btr;
297 cwt->task.post_select = check_wav_post_select_btr;
299 register_task(&cwt->task);
301 wns = para_malloc(conf.writer_given * sizeof(*wns));
303 for (i = 0; i < conf.writer_given; i++) {
304 struct writer_node *wn = para_calloc(sizeof(*wn));
308 ret = -E_WRITE_SYNTAX;
309 wn->conf = check_writer_arg(conf.writer_arg[i],
313 w = writers + wn->writer_num;
314 name = writer_names[wn->writer_num];
315 wn->btrn = btr_new_node(name, cwt->btrn, w->execute, wn);
316 sprintf(wn->task.status, "%s", name);
318 wn->task.post_select = w->post_select_btr;
319 wn->task.pre_select = w->pre_select_btr;
320 register_task(&wn->task);
325 s->default_timeout.tv_sec = 10;
326 s->default_timeout.tv_usec = 50000;
329 for (; i >= 0; i--) {
330 struct writer_node *wn = wns[i];
339 * Para_write's main function.
341 * \param argc The usual argument counter.
342 * \param argv The usual argument vector.
344 * It registers the stdin task, the check_wav_task, the task for initial delay
345 * and all tasks for actually writing out the stream.
347 * \return \p EXIT_SUCCESS or EXIT_FAILURE
349 int main(int argc, char *argv[])
351 int ret = -E_WRITE_SYNTAX;
352 static struct sched s;
353 struct check_wav_task *cwt = &the_check_wav_task;
354 struct initial_delay_task *idt = &the_initial_delay_task;
357 write_cmdline_parser(argc, argv, &conf);
358 HANDLE_VERSION_FLAG("write", conf);
359 if (conf.help_given || conf.detailed_help_given)
360 print_help_and_die();
362 if (conf.buffer_tree_given) {
369 stdin_set_defaults(&sit);
370 ret = -ERRNO_TO_PARA_ERROR(EINVAL);
371 if (conf.bufsize_arg < 0)
373 if (conf.bufsize_arg >= INT_MAX / 1024)
375 sit.bufsize = conf.bufsize_arg * 1024;
376 sit.buf = para_malloc(sit.bufsize);
378 wng->bufp = &sit.buf;
379 wng->loaded = &sit.loaded;
380 wng->input_error = &sit.task.error;
382 register_task(&sit.task);
385 cwt->loaded = &sit.loaded;
386 cwt->input_error = &sit.task.error;
387 sprintf(cwt->task.status, "check wav");
388 cwt->task.pre_select = check_wav_pre_select;
390 idt->task.pre_select = initial_delay_pre_select;
391 sprintf(idt->task.status, "initial_delay");
392 register_task(&idt->task);
394 s.default_timeout.tv_sec = 10;
395 s.default_timeout.tv_usec = 0;
400 PARA_ERROR_LOG("%s\n", para_strerror(-ret));