2 * Copyright (C) 2005-2008 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. */
14 #include "write.cmdline.h"
19 #include "write_common.h"
25 /** Check if given buffer contains a valid wave header. */
26 struct check_wav_task {
27 /** The buffer to check. */
29 /** Number of bytes loaded in \a buf. */
31 /** Non-zero if an error occurred or end of file was reached. */
33 /** Number of channels specified in wav header given by \a buf. */
35 /** Sample rate specified in wav header given by \a buf. */
37 /** The task structure for this task. */
41 /** Delay writing until given time. */
42 struct initial_delay_task {
43 /** The time the first data should be written out. */
44 struct timeval start_time;
45 /** The task structure for this task. */
49 static struct write_args_info conf;
50 static struct stdin_task sit;
51 static struct check_wav_task cwt;
52 static struct initial_delay_task idt;
53 static struct writer_node_group *wng;
55 /** Length of a standard wav header. */
56 #define WAV_HEADER_LEN 44
59 * Test if audio buffer contains a valid wave header.
61 * \return If not, return -E_NO_WAV_HEADER, otherwise, return zero. If
62 * there is less than WAV_HEADER_LEN bytes available, return one.
64 static void check_wav_pre_select(__a_unused struct sched *s, struct task *t)
66 struct check_wav_task *wt = t->private_data;
69 if (*wt->loaded < WAV_HEADER_LEN) {
70 t->ret = *wt->error? -E_PREMATURE_END : 1;
74 wt->samplerate = 44100;
75 a = (unsigned char*)wt->buf;
76 t->ret = -E_NO_WAV_HEADER;
77 if (a[0] != 'R' || a[1] != 'I' || a[2] != 'F' || a[3] != 'F')
79 wt->channels = (unsigned) a[22];
80 wt->samplerate = a[24] + (a[25] << 8) + (a[26] << 16) + (a[27] << 24);
81 *wt->loaded -= WAV_HEADER_LEN;
82 memmove(wt->buf, wt->buf + WAV_HEADER_LEN, *wt->loaded);
83 t->ret = -E_WAV_HEADER_SUCCESS;
84 PARA_INFO_LOG("channels: %d, sample rate: %d\n", wt->channels, wt->samplerate);
87 static void initial_delay_pre_select(struct sched *s, struct task *t)
89 struct initial_delay_task *dt = t->private_data;
93 if (!dt->start_time.tv_sec && !dt->start_time.tv_usec)
95 t->ret = -E_DELAY_TIMEOUT;
96 if (tv_diff(now, &dt->start_time, &diff) > 0)
99 if (tv_diff(&s->timeout , &diff, NULL) > 0)
103 INIT_STDERR_LOGGING(conf.loglevel_arg)
105 static struct writer_node_group *check_args(void)
107 int i, ret = -E_WRITE_SYNTAX;
108 struct writer_node_group *g = NULL;
110 if (conf.list_writers_given) {
113 char *tmp = make_message("%s%s%s",
120 fprintf(stderr, "%s\n", msg);
124 if (conf.start_time_given) {
125 long unsigned sec, usec;
126 if (sscanf(conf.start_time_arg, "%lu:%lu",
129 idt.start_time.tv_sec = sec;
130 idt.start_time.tv_usec = usec;
132 if (!conf.writer_given) {
133 g = setup_default_wng();
137 g = wng_new(conf.writer_given);
138 ret = -E_WRITE_SYNTAX;
139 for (i = 0; i < conf.writer_given; i++) {
141 g->writer_nodes[i].conf = check_writer_arg(
142 conf.writer_arg[i], &writer_num);
143 if (!g->writer_nodes[i].conf)
145 g->writer_nodes[i].writer = &writers[writer_num];
155 static void wng_event_handler(struct task *t)
157 struct writer_node_group *g = t->private_data;
159 PARA_INFO_LOG("%s\n", para_strerror(-t->ret));
165 static void idt_event_handler(struct task *t)
169 PARA_INFO_LOG("%s\n", para_strerror(-t->ret));
172 wng->loaded = &sit.loaded;
173 wng->input_error = &sit.error;
174 wng->task.event_handler = wng_event_handler;
175 wng->channels = &cwt.channels;
176 wng->samplerate = &cwt.samplerate;
179 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
184 static void cwt_event_handler(struct task *t)
186 if (t->ret != -E_NO_WAV_HEADER && t->ret != -E_WAV_HEADER_SUCCESS) {
187 PARA_ERROR_LOG("%s\n", para_strerror(-t->ret));
190 PARA_INFO_LOG("%s\n", para_strerror(-t->ret));
192 // if (t->ret == -E_WAV_HEADER_SUCCESS) {
193 // conf.channels_arg = cwt.channels;
194 // conf.sample_rate_arg = cwt.sample_rate;
196 idt.task.pre_select = initial_delay_pre_select;
197 idt.task.private_data = &idt;
198 idt.task.event_handler = idt_event_handler;
199 sprintf(idt.task.status, "initial_delay");
200 register_task(&idt.task);
204 * Para_write's main function.
206 * \param argc The usual argument counter.
207 * \param argv The usual argument vector.
209 * It registers the stdin task, the check_wav_task, the task for initial delay
210 * and all tasks for actually writing out the stream.
212 * \return \p EXIT_SUCCESS or EXIT_FAILURE
214 int main(int argc, char *argv[])
216 int ret = -E_WRITE_SYNTAX;
219 write_cmdline_parser(argc, argv, &conf);
220 HANDLE_VERSION_FLAG("write", conf);
221 init_supported_writers();
226 stdin_set_defaults(&sit);
227 if (conf.bufsize_given)
228 sit.bufsize = conf.bufsize_arg;
229 sit.buf = para_malloc(sit.bufsize),
230 register_task(&sit.task);
232 cwt.task.pre_select = check_wav_pre_select;
233 cwt.task.private_data = &cwt;
234 cwt.task.event_handler = cwt_event_handler;
236 cwt.loaded = &sit.loaded;
237 cwt.error = &sit.error;
238 sprintf(cwt.task.status, "check wav");
239 register_task(&cwt.task);
241 s.default_timeout.tv_sec = 1;
242 s.default_timeout.tv_usec = 0;
247 PARA_ERROR_LOG("%s\n", para_strerror(-ret));