2 * Copyright (C) 2005-2011 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>
15 #include "write.cmdline.h"
20 #include "buffer_tree.h"
22 #include "write_common.h"
29 enum check_wav_state {
35 /* Information extracted from the wav header. */
36 struct check_wav_task {
38 /** Number of channels. */
40 unsigned sample_format;
41 /** Sample rate specified in wav header given by \a buf. */
43 /** The task structure used by the scheduler. */
45 struct btr_node *btrn;
49 static struct write_args_info conf;
51 static struct stdin_task sit;
53 /** Length of a standard wav header. */
54 #define WAV_HEADER_LEN 44
56 static void check_wav_pre_select(struct sched *s, struct task *t)
58 struct check_wav_task *cwt = container_of(t, struct check_wav_task, task);
61 ret = btr_node_status(cwt->btrn, cwt->min_iqs, BTR_NT_INTERNAL);
66 #define HANDLE_EXEC(_cmd) \
67 if (!strcmp(cmd, #_cmd)) { \
68 if (!conf._cmd ## _given && cwt->state == CWS_NEED_HEADER) \
69 return -E_BTR_NAVAIL; \
70 *result = make_message("%d", cwt->state == CWS_NO_HEADER || conf._cmd ## _given? \
71 conf._cmd ## _arg : cwt->_cmd); \
76 static int check_wav_exec(struct btr_node *btrn, const char *cmd, char **result)
78 struct check_wav_task *cwt = btr_context(btrn);
80 HANDLE_EXEC(sample_rate);
81 HANDLE_EXEC(channels);
82 HANDLE_EXEC(sample_format);
83 return -ERRNO_TO_PARA_ERROR(ENOTSUP);
86 static void check_wav_post_select(__a_unused struct sched *s, struct task *t)
88 struct check_wav_task *cwt = container_of(t, struct check_wav_task, task);
89 struct btr_node *btrn = cwt->btrn;
93 uint16_t bps; /* bits per sample */
94 const char *sample_formats[] = {SAMPLE_FORMATS};
97 ret = btr_node_status(btrn, cwt->min_iqs, BTR_NT_INTERNAL);
100 if (cwt->state != CWS_NEED_HEADER)
102 btr_merge(btrn, cwt->min_iqs);
103 sz = btr_next_buffer(btrn, (char **)&a);
104 if (sz < cwt->min_iqs) /* file size less than WAV_HEADER_SIZE */
108 * The default byte ordering assumed for WAVE data files is
109 * little-endian. Files written using the big-endian byte ordering
110 * scheme have the identifier RIFX instead of RIFF.
112 if (a[0] != 'R' || a[1] != 'I' || a[2] != 'F' ||
113 (a[3] != 'F' && a[3] != 'X')) {
114 PARA_NOTICE_LOG("wav header not found\n");
115 cwt->state = CWS_NO_HEADER;
116 sprintf(t->status, "check wav: no header");
119 PARA_INFO_LOG("found wav header\n");
120 cwt->state = CWS_HAVE_HEADER;
121 sprintf(t->status, "check wav: have header");
122 cwt->channels = (unsigned) a[22];
123 cwt->sample_rate = a[24] + (a[25] << 8) + (a[26] << 16) + (a[27] << 24);
124 bps = a[34] + ((unsigned)a[35] << 8);
125 if (bps != 8 && bps != 16) {
126 PARA_WARNING_LOG("%u bps not supported, assuming 16\n", bps);
130 * 8-bit samples are stored as unsigned bytes, ranging from 0 to 255.
131 * 16-bit samples are stored as 2's-complement signed integers, ranging
132 * from -32768 to 32767.
135 cwt->sample_format = SF_U8;
137 cwt->sample_format = (a[3] == 'F')? SF_S16_LE : SF_S16_BE;
138 PARA_NOTICE_LOG("%dHz, %s, %s\n", cwt->sample_rate,
139 cwt->channels == 1? "mono" : "stereo",
140 sample_formats[cwt->sample_format]);
141 btr_consume(btrn, WAV_HEADER_LEN);
147 btr_remove_node(btrn);
151 INIT_STDERR_LOGGING(loglevel)
153 __noreturn static void print_help_and_die(void)
155 int d = conf.detailed_help_given;
156 const char **p = d? write_args_info_detailed_help
157 : write_args_info_help;
159 printf_or_die("%s\n\n", WRITE_CMDLINE_PARSER_PACKAGE "-"
160 WRITE_CMDLINE_PARSER_VERSION);
161 printf_or_die("%s\n\n", write_args_info_usage);
163 printf_or_die("%s\n", *p);
164 print_writer_helps(d);
169 * Parse config and register a task for a writer node.
171 * \param arg Command line arguments.
172 * \param parent The new node will be a child of \a parent.
173 * \param wn The writer node.
175 * If arg is \p NULL, the OS-dependent default writer is used with no
176 * arguments. The default writers are alsa for Linux, osx for OS X, oss for
177 * *BSD, and the file writer if the default writer is not supported.
179 * Once the writer configuration has been retrieved from the ->parse_config
180 * callback a writer node is created, its buffer tree node is added to the
181 * buffer tree as a child of the given parent.
183 * Finally, the new writer node's task structure is initialized and registered
184 * to the paraslash scheduler.
188 static int setup_writer_node(const char *arg, struct btr_node *parent,
189 struct writer_node *wn)
192 wn->conf = check_writer_arg(arg, &wn->writer_num);
194 wn->writer_num = DEFAULT_WRITER;
195 wn->conf = writers[DEFAULT_WRITER].parse_config_or_die("");
198 return -E_WRITE_COMMON_SYNTAX;
199 register_writer_node(wn, parent);
203 static int setup_and_schedule(void)
206 struct check_wav_task _cwt, *cwt = &_cwt;
207 struct writer_node *wns;
208 static struct sched s;
210 loglevel = get_loglevel_by_name(conf.loglevel_arg);
211 sit.btrn = btr_new_node(&(struct btr_node_description)
212 EMBRACE(.name = "stdin"));
213 stdin_set_defaults(&sit);
214 register_task(&sit.task);
216 cwt->state = CWS_NEED_HEADER;
217 cwt->min_iqs = WAV_HEADER_LEN;
218 cwt->btrn = btr_new_node(&(struct btr_node_description)
219 EMBRACE(.name = "check_wav", .parent = sit.btrn,
220 .handler = check_wav_exec, .context = cwt));
221 sprintf(cwt->task.status, "check_wav");
222 cwt->task.pre_select = check_wav_pre_select;
223 cwt->task.post_select = check_wav_post_select;
225 register_task(&cwt->task);
227 if (!conf.writer_given) {
229 wns = para_calloc(sizeof(*wns));
230 ret = setup_writer_node(NULL, cwt->btrn, wns);
235 wns = para_calloc(conf.writer_given * sizeof(*wns));
236 for (i = 0; i < conf.writer_given; i++) {
237 ret = setup_writer_node(conf.writer_arg[i],
244 s.default_timeout.tv_sec = 10;
245 s.default_timeout.tv_usec = 50000;
249 for (j = 0; j < i; j++) {
250 struct task *t = &wns[j].task;
251 assert(t->error < 0);
252 if (t->error != -E_WRITE_COMMON_EOF
253 && t->error != -E_BTR_EOF) {
254 PARA_ERROR_LOG("%s: %s\n", t->status,
255 para_strerror(-t->error));
262 for (i--; i >= 0; i--) {
263 struct writer_node *wn = wns + i;
264 struct writer *w = writers + wn->writer_num;
267 btr_free_node(wn->btrn);
268 w->free_config(wn->conf);
272 btr_free_node(cwt->btrn);
277 * Para_write's main function.
279 * \param argc The usual argument counter.
280 * \param argv The usual argument vector.
282 * It sets up and starts the tasks and the buffer tree nodes determined by
283 * command line options.
285 * \return \p EXIT_SUCCESS or EXIT_FAILURE
287 int main(int argc, char *argv[])
292 write_cmdline_parser(argc, argv, &conf);
293 HANDLE_VERSION_FLAG("write", conf);
294 if (conf.help_given || conf.detailed_help_given)
295 print_help_and_die();
297 ret = setup_and_schedule();
299 PARA_ERROR_LOG("%s\n", para_strerror(-ret));