2 * Copyright (C) 2005-2012 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>
14 #include "write.cmdline.h"
19 #include "buffer_tree.h"
21 #include "write_common.h"
28 enum check_wav_state {
34 /* Information extracted from the wav header. */
35 struct check_wav_task {
37 /** Number of channels. */
39 unsigned sample_format;
40 /** Sample rate specified in wav header given by \a buf. */
42 /** The task structure used by the scheduler. */
44 struct btr_node *btrn;
48 static struct write_args_info conf;
50 static struct stdin_task sit;
52 /** Length of a standard wav header. */
53 #define WAV_HEADER_LEN 44
55 static void check_wav_pre_select(struct sched *s, struct task *t)
57 struct check_wav_task *cwt = container_of(t, struct check_wav_task, task);
60 ret = btr_node_status(cwt->btrn, cwt->min_iqs, BTR_NT_INTERNAL);
65 #define HANDLE_EXEC(_cmd) \
66 if (!strcmp(cmd, #_cmd)) { \
67 if (!conf._cmd ## _given && cwt->state == CWS_NEED_HEADER) \
68 return -E_BTR_NAVAIL; \
69 *result = make_message("%d", cwt->state == CWS_NO_HEADER || conf._cmd ## _given? \
70 conf._cmd ## _arg : cwt->_cmd); \
75 static int check_wav_exec(struct btr_node *btrn, const char *cmd, char **result)
77 struct check_wav_task *cwt = btr_context(btrn);
79 HANDLE_EXEC(sample_rate);
80 HANDLE_EXEC(channels);
81 HANDLE_EXEC(sample_format);
82 return -ERRNO_TO_PARA_ERROR(ENOTSUP);
85 static void check_wav_post_select(__a_unused struct sched *s, struct task *t)
87 struct check_wav_task *cwt = container_of(t, struct check_wav_task, task);
88 struct btr_node *btrn = cwt->btrn;
92 uint16_t bps; /* bits per sample */
93 const char *sample_formats[] = {SAMPLE_FORMATS};
96 ret = btr_node_status(btrn, cwt->min_iqs, BTR_NT_INTERNAL);
99 if (cwt->state != CWS_NEED_HEADER)
101 btr_merge(btrn, cwt->min_iqs);
102 sz = btr_next_buffer(btrn, (char **)&a);
103 if (sz < cwt->min_iqs) /* file size less than WAV_HEADER_SIZE */
107 * The default byte ordering assumed for WAVE data files is
108 * little-endian. Files written using the big-endian byte ordering
109 * scheme have the identifier RIFX instead of RIFF.
111 if (a[0] != 'R' || a[1] != 'I' || a[2] != 'F' ||
112 (a[3] != 'F' && a[3] != 'X')) {
113 PARA_NOTICE_LOG("wav header not found\n");
114 cwt->state = CWS_NO_HEADER;
115 sprintf(t->status, "check wav: no header");
118 PARA_INFO_LOG("found wav header\n");
119 cwt->state = CWS_HAVE_HEADER;
120 sprintf(t->status, "check wav: have header");
121 cwt->channels = (unsigned) a[22];
122 cwt->sample_rate = a[24] + (a[25] << 8) + (a[26] << 16) + (a[27] << 24);
123 bps = a[34] + ((unsigned)a[35] << 8);
124 if (bps != 8 && bps != 16) {
125 PARA_WARNING_LOG("%u bps not supported, assuming 16\n", bps);
129 * 8-bit samples are stored as unsigned bytes, ranging from 0 to 255.
130 * 16-bit samples are stored as 2's-complement signed integers, ranging
131 * from -32768 to 32767.
134 cwt->sample_format = SF_U8;
136 cwt->sample_format = (a[3] == 'F')? SF_S16_LE : SF_S16_BE;
137 PARA_NOTICE_LOG("%dHz, %s, %s\n", cwt->sample_rate,
138 cwt->channels == 1? "mono" : "stereo",
139 sample_formats[cwt->sample_format]);
140 btr_consume(btrn, WAV_HEADER_LEN);
146 btr_remove_node(btrn);
150 INIT_STDERR_LOGGING(loglevel)
152 __noreturn static void print_help_and_die(void)
154 int d = conf.detailed_help_given;
155 const char **p = d? write_args_info_detailed_help
156 : write_args_info_help;
158 printf_or_die("%s\n\n", WRITE_CMDLINE_PARSER_PACKAGE "-"
159 WRITE_CMDLINE_PARSER_VERSION);
160 printf_or_die("%s\n\n", write_args_info_usage);
162 printf_or_die("%s\n", *p);
163 print_writer_helps(d);
168 * Parse config and register a task for a writer node.
170 * \param arg Command line arguments.
171 * \param parent The new node will be a child of \a parent.
172 * \param wn The writer node.
174 * If arg is \p NULL, the OS-dependent default writer is used with no
175 * arguments. The default writers are alsa for Linux, osx for OS X, oss for
176 * *BSD, and the file writer if the default writer is not supported.
178 * Once the writer configuration has been retrieved from the ->parse_config
179 * callback a writer node is created, its buffer tree node is added to the
180 * buffer tree as a child of the given parent.
182 * Finally, the new writer node's task structure is initialized and registered
183 * to the paraslash scheduler.
187 static void setup_writer_node(const char *arg, struct btr_node *parent,
188 struct writer_node *wn, struct sched *s)
191 wn->conf = check_writer_arg_or_die(arg, &wn->writer_num);
193 wn->writer_num = DEFAULT_WRITER;
194 wn->conf = writers[DEFAULT_WRITER].parse_config_or_die("");
196 register_writer_node(wn, parent, s);
199 static int setup_and_schedule(void)
202 struct check_wav_task _cwt, *cwt = &_cwt;
203 struct writer_node *wns;
204 static struct sched s;
206 loglevel = get_loglevel_by_name(conf.loglevel_arg);
207 sit.btrn = btr_new_node(&(struct btr_node_description)
208 EMBRACE(.name = "stdin"));
209 stdin_set_defaults(&sit);
210 register_task(&s, &sit.task);
212 cwt->state = CWS_NEED_HEADER;
213 cwt->min_iqs = WAV_HEADER_LEN;
214 cwt->btrn = btr_new_node(&(struct btr_node_description)
215 EMBRACE(.name = "check_wav", .parent = sit.btrn,
216 .handler = check_wav_exec, .context = cwt));
217 sprintf(cwt->task.status, "check_wav");
218 cwt->task.pre_select = check_wav_pre_select;
219 cwt->task.post_select = check_wav_post_select;
221 register_task(&s, &cwt->task);
223 if (!conf.writer_given) {
224 wns = para_calloc(sizeof(*wns));
225 setup_writer_node(NULL, cwt->btrn, wns, &s);
228 wns = para_calloc(conf.writer_given * sizeof(*wns));
229 for (i = 0; i < conf.writer_given; i++)
230 setup_writer_node(conf.writer_arg[i], cwt->btrn,
234 s.default_timeout.tv_sec = 10;
235 s.default_timeout.tv_usec = 50000;
239 for (j = 0; j < i; j++) {
240 struct task *t = &wns[j].task;
241 assert(t->error < 0);
242 if (t->error != -E_WRITE_COMMON_EOF
243 && t->error != -E_BTR_EOF) {
244 PARA_ERROR_LOG("%s: %s\n", t->status,
245 para_strerror(-t->error));
251 for (i--; i >= 0; i--) {
252 struct writer_node *wn = wns + i;
253 struct writer *w = writers + wn->writer_num;
256 btr_free_node(wn->btrn);
257 w->free_config(wn->conf);
261 btr_free_node(cwt->btrn);
266 * Para_write's main function.
268 * \param argc The usual argument counter.
269 * \param argv The usual argument vector.
271 * It sets up and starts the tasks and the buffer tree nodes determined by
272 * command line options.
274 * \return \p EXIT_SUCCESS or EXIT_FAILURE
276 int main(int argc, char *argv[])
281 write_cmdline_parser(argc, argv, &conf);
282 HANDLE_VERSION_FLAG("write", conf);
283 if (conf.help_given || conf.detailed_help_given)
284 print_help_and_die();
286 ret = setup_and_schedule();
288 PARA_ERROR_LOG("%s\n", para_strerror(-ret));