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 used by the scheduler. */
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
;
51 static struct stdin_task sit
;
53 static struct check_wav_task the_check_wav_task
;
54 static struct initial_delay_task the_initial_delay_task
;
56 static struct writer_node_group
*wng
;
58 /** Length of a standard wav header. */
59 #define WAV_HEADER_LEN 44
62 * Test if audio buffer contains a valid wave header.
64 * \return If not, return -E_NO_WAV_HEADER, otherwise, return zero. If
65 * there is less than WAV_HEADER_LEN bytes available, return one.
67 static void check_wav_pre_select(__a_unused
struct sched
*s
, struct task
*t
)
69 struct check_wav_task
*cwt
= container_of(t
, struct check_wav_task
, task
);
73 if (*cwt
->loaded
< WAV_HEADER_LEN
) {
74 if (*cwt
->input_error
< 0)
75 t
->error
= *cwt
->input_error
;
79 cwt
->samplerate
= 44100;
80 a
= (unsigned char*)cwt
->buf
;
81 if (a
[0] != 'R' || a
[1] != 'I' || a
[2] != 'F' || a
[3] != 'F') {
82 PARA_NOTICE_LOG("wav header not found\n");
83 t
->error
= -E_NO_WAV_HEADER
;
86 cwt
->channels
= (unsigned) a
[22];
87 cwt
->samplerate
= a
[24] + (a
[25] << 8) + (a
[26] << 16) + (a
[27] << 24);
88 *cwt
->loaded
-= WAV_HEADER_LEN
;
89 memmove(cwt
->buf
, cwt
->buf
+ WAV_HEADER_LEN
, *cwt
->loaded
);
90 t
->error
= -E_WAV_HEADER_SUCCESS
;
91 PARA_INFO_LOG("channels: %d, sample rate: %d\n", cwt
->channels
, cwt
->samplerate
);
93 wng
->channels
= &cwt
->channels
;
94 wng
->samplerate
= &cwt
->samplerate
;
98 s
->timeout
.tv_sec
= 0;
99 s
->timeout
.tv_usec
= 1;
102 static void initial_delay_pre_select(struct sched
*s
, struct task
*t
)
104 struct initial_delay_task
*idt
= container_of(t
, struct initial_delay_task
, task
);
107 if (!idt
->start_time
.tv_sec
&& !idt
->start_time
.tv_usec
) {
108 t
->error
= -E_NO_DELAY
;
109 goto register_check_wav
;
111 if (tv_diff(now
, &idt
->start_time
, &diff
) > 0) {
112 t
->error
= -E_DELAY_TIMEOUT
;
113 goto register_check_wav
;
115 if (tv_diff(&s
->timeout
, &diff
, NULL
) > 0)
119 register_task(&the_check_wav_task
.task
);
120 s
->timeout
.tv_sec
= 0;
121 s
->timeout
.tv_usec
= 1;
124 INIT_STDERR_LOGGING(conf
.loglevel_arg
)
126 static struct writer_node_group
*check_args(void)
128 int i
, ret
= -E_WRITE_SYNTAX
;
129 struct writer_node_group
*g
= NULL
;
130 struct initial_delay_task
*idt
= &the_initial_delay_task
;
132 if (conf
.list_writers_given
) {
135 char *tmp
= make_message("%s%s%s",
142 fprintf(stderr
, "%s\n", msg
);
146 if (conf
.start_time_given
) {
147 long unsigned sec
, usec
;
148 if (sscanf(conf
.start_time_arg
, "%lu:%lu",
151 idt
->start_time
.tv_sec
= sec
;
152 idt
->start_time
.tv_usec
= usec
;
154 if (!conf
.writer_given
) {
155 g
= setup_default_wng();
159 g
= wng_new(conf
.writer_given
);
160 ret
= -E_WRITE_SYNTAX
;
161 for (i
= 0; i
< conf
.writer_given
; i
++) {
163 g
->writer_nodes
[i
].conf
= check_writer_arg(
164 conf
.writer_arg
[i
], &writer_num
);
165 if (!g
->writer_nodes
[i
].conf
)
167 g
->writer_nodes
[i
].writer
= &writers
[writer_num
];
178 * Para_write's main function.
180 * \param argc The usual argument counter.
181 * \param argv The usual argument vector.
183 * It registers the stdin task, the check_wav_task, the task for initial delay
184 * and all tasks for actually writing out the stream.
186 * \return \p EXIT_SUCCESS or EXIT_FAILURE
188 int main(int argc
, char *argv
[])
190 int ret
= -E_WRITE_SYNTAX
;
191 static struct sched s
;
192 struct check_wav_task
*cwt
= &the_check_wav_task
;
193 struct initial_delay_task
*idt
= &the_initial_delay_task
;
195 write_cmdline_parser(argc
, argv
, &conf
);
196 HANDLE_VERSION_FLAG("write", conf
);
197 init_supported_writers();
202 stdin_set_defaults(&sit
);
203 ret
= -ERRNO_TO_PARA_ERROR(EINVAL
);
204 if (conf
.bufsize_arg
< 0)
206 if (conf
.bufsize_arg
>= INT_MAX
/ 1024)
208 sit
.bufsize
= conf
.bufsize_arg
* 1024;
209 sit
.buf
= para_malloc(sit
.bufsize
);
212 wng
->loaded
= &sit
.loaded
;
213 wng
->input_error
= &sit
.task
.error
;
215 register_task(&sit
.task
);
218 cwt
->loaded
= &sit
.loaded
;
219 cwt
->input_error
= &sit
.task
.error
;
220 sprintf(cwt
->task
.status
, "check wav");
221 cwt
->task
.pre_select
= check_wav_pre_select
;
223 idt
->task
.pre_select
= initial_delay_pre_select
;
224 sprintf(idt
->task
.status
, "initial_delay");
225 register_task(&idt
->task
);
227 s
.default_timeout
.tv_sec
= 10;
228 s
.default_timeout
.tv_usec
= 0;
233 PARA_ERROR_LOG("%s\n", para_strerror(-ret
));