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. */
14 #include "write.cmdline.h"
20 #include "write_common.h"
26 /** Check if given buffer contains a valid wave header. */
27 struct check_wav_task
{
28 /** The buffer to check. */
30 /** Number of bytes loaded in \a buf. */
32 /** Non-zero if an error occurred or end of file was reached. */
34 /** Number of channels specified in wav header given by \a buf. */
36 /** Sample rate specified in wav header given by \a buf. */
38 /** The task structure used by the scheduler. */
42 /** Delay writing until given time. */
43 struct initial_delay_task
{
44 /** The time the first data should be written out. */
45 struct timeval start_time
;
46 /** The task structure for this task. */
50 static struct write_args_info conf
;
52 static struct stdin_task sit
;
54 static struct check_wav_task the_check_wav_task
;
55 static struct initial_delay_task the_initial_delay_task
;
57 static struct writer_node_group
*wng
;
59 /** Length of a standard wav header. */
60 #define WAV_HEADER_LEN 44
63 * Test if audio buffer contains a valid wave header.
65 * \return If not, return -E_NO_WAV_HEADER, otherwise, return zero. If
66 * there is less than WAV_HEADER_LEN bytes available, return one.
68 static void check_wav_pre_select(__a_unused
struct sched
*s
, struct task
*t
)
70 struct check_wav_task
*cwt
= container_of(t
, struct check_wav_task
, task
);
74 if (*cwt
->loaded
< WAV_HEADER_LEN
) {
75 if (*cwt
->input_error
< 0)
76 t
->error
= *cwt
->input_error
;
80 cwt
->samplerate
= 44100;
81 a
= (unsigned char*)cwt
->buf
;
82 if (a
[0] != 'R' || a
[1] != 'I' || a
[2] != 'F' || a
[3] != 'F') {
83 PARA_NOTICE_LOG("wav header not found\n");
84 t
->error
= -E_NO_WAV_HEADER
;
87 cwt
->channels
= (unsigned) a
[22];
88 cwt
->samplerate
= a
[24] + (a
[25] << 8) + (a
[26] << 16) + (a
[27] << 24);
89 *cwt
->loaded
-= WAV_HEADER_LEN
;
90 memmove(cwt
->buf
, cwt
->buf
+ WAV_HEADER_LEN
, *cwt
->loaded
);
91 t
->error
= -E_WAV_HEADER_SUCCESS
;
92 PARA_INFO_LOG("channels: %d, sample rate: %d\n", cwt
->channels
, cwt
->samplerate
);
94 wng
->channels
= &cwt
->channels
;
95 wng
->samplerate
= &cwt
->samplerate
;
99 s
->timeout
.tv_sec
= 0;
100 s
->timeout
.tv_usec
= 1;
103 static void initial_delay_pre_select(struct sched
*s
, struct task
*t
)
105 struct initial_delay_task
*idt
= container_of(t
, struct initial_delay_task
, task
);
108 if (!idt
->start_time
.tv_sec
&& !idt
->start_time
.tv_usec
) {
109 t
->error
= -E_NO_DELAY
;
110 goto register_check_wav
;
112 if (tv_diff(now
, &idt
->start_time
, &diff
) > 0) {
113 t
->error
= -E_DELAY_TIMEOUT
;
114 goto register_check_wav
;
116 if (tv_diff(&s
->timeout
, &diff
, NULL
) > 0)
120 register_task(&the_check_wav_task
.task
);
121 s
->timeout
.tv_sec
= 0;
122 s
->timeout
.tv_usec
= 1;
125 INIT_STDERR_LOGGING(conf
.loglevel_arg
)
127 static struct writer_node_group
*check_args(void)
129 int i
, ret
= -E_WRITE_SYNTAX
;
130 struct writer_node_group
*g
= NULL
;
131 struct initial_delay_task
*idt
= &the_initial_delay_task
;
133 if (conf
.start_time_given
) {
134 long unsigned sec
, usec
;
135 if (sscanf(conf
.start_time_arg
, "%lu:%lu",
138 idt
->start_time
.tv_sec
= sec
;
139 idt
->start_time
.tv_usec
= usec
;
141 if (!conf
.writer_given
) {
142 g
= setup_default_wng();
146 g
= wng_new(conf
.writer_given
);
147 ret
= -E_WRITE_SYNTAX
;
148 for (i
= 0; i
< conf
.writer_given
; i
++) {
150 g
->writer_nodes
[i
].conf
= check_writer_arg(
151 conf
.writer_arg
[i
], &writer_num
);
152 if (!g
->writer_nodes
[i
].conf
)
154 g
->writer_nodes
[i
].writer
= &writers
[writer_num
];
164 __noreturn
static void print_help_and_die(void)
166 int d
= conf
.detailed_help_given
;
167 const char **p
= d
? write_args_info_detailed_help
168 : write_args_info_help
;
170 printf_or_die("%s\n\n", WRITE_CMDLINE_PARSER_PACKAGE
"-"
171 WRITE_CMDLINE_PARSER_VERSION
);
172 printf_or_die("%s\n\n", write_args_info_usage
);
174 printf_or_die("%s\n", *p
);
175 print_writer_helps(d
);
180 * Para_write's main function.
182 * \param argc The usual argument counter.
183 * \param argv The usual argument vector.
185 * It registers the stdin task, the check_wav_task, the task for initial delay
186 * and all tasks for actually writing out the stream.
188 * \return \p EXIT_SUCCESS or EXIT_FAILURE
190 int main(int argc
, char *argv
[])
192 int ret
= -E_WRITE_SYNTAX
;
193 static struct sched s
;
194 struct check_wav_task
*cwt
= &the_check_wav_task
;
195 struct initial_delay_task
*idt
= &the_initial_delay_task
;
197 init_supported_writers();
198 write_cmdline_parser(argc
, argv
, &conf
);
199 HANDLE_VERSION_FLAG("write", conf
);
200 if (conf
.help_given
|| conf
.detailed_help_given
)
201 print_help_and_die();
206 stdin_set_defaults(&sit
);
207 ret
= -ERRNO_TO_PARA_ERROR(EINVAL
);
208 if (conf
.bufsize_arg
< 0)
210 if (conf
.bufsize_arg
>= INT_MAX
/ 1024)
212 sit
.bufsize
= conf
.bufsize_arg
* 1024;
213 sit
.buf
= para_malloc(sit
.bufsize
);
216 wng
->loaded
= &sit
.loaded
;
217 wng
->input_error
= &sit
.task
.error
;
219 register_task(&sit
.task
);
222 cwt
->loaded
= &sit
.loaded
;
223 cwt
->input_error
= &sit
.task
.error
;
224 sprintf(cwt
->task
.status
, "check wav");
225 cwt
->task
.pre_select
= check_wav_pre_select
;
227 idt
->task
.pre_select
= initial_delay_pre_select
;
228 sprintf(idt
->task
.status
, "initial_delay");
229 register_task(&idt
->task
);
231 s
.default_timeout
.tv_sec
= 10;
232 s
.default_timeout
.tv_usec
= 0;
237 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));