X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=write.c;h=dda1b705c19151000dd08098f99d2b9d4c71f11c;hp=9577f0406b8cf1f0968300591a75e44bec6be75f;hb=fa578bf1d070161cafcbcc69ca7b810414ee1a4b;hpb=d0f36435b0f81368a778fda33f3a7df86830f5ac

diff --git a/write.c b/write.c
index 9577f040..dda1b705 100644
--- a/write.c
+++ b/write.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2005-2009 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2005-2011 Andre Noll <maan@systemlinux.org>
  *
  * Licensed under the GPL v2. For licencing details see COPYING.
  */
@@ -26,153 +26,91 @@
 
 INIT_WRITE_ERRLISTS;
 
-/** Check if given buffer contains a valid wave header. */
-struct check_wav_task {
-	/** The buffer to check. */
-	char *buf;
-	/** Number of bytes loaded in \a buf. */
-	size_t *loaded;
-	/** Non-zero if an error occurred or end of file was reached. */
-	int *input_error;
-	/** Number of channels specified in wav header given by \a buf. */
-	unsigned channels;
-	/** Sample rate specified in wav header given by \a buf. */
-	unsigned samplerate;
-	/** The task structure used by the scheduler. */
-	struct task task;
-};
-
 enum check_wav_state {
 	CWS_NEED_HEADER,
 	CWS_HAVE_HEADER,
 	CWS_NO_HEADER,
 };
 
-struct check_wav_task_btr {
+/* Information extracted from the wav header. */
+struct check_wav_task {
 	int state;
-	/** Number of channels specified in wav header given by \a buf. */
+	/** Number of channels. */
 	unsigned channels;
+	unsigned sample_format;
 	/** Sample rate specified in wav header given by \a buf. */
-	unsigned samplerate;
+	unsigned sample_rate;
 	/** The task structure used by the scheduler. */
 	struct task task;
 	struct btr_node *btrn;
-};
-
-/** Delay writing until given time. */
-struct initial_delay_task {
-	/** The time the first data should be written out. */
-	struct timeval start_time;
-	/** The task structure for this task. */
-	struct task task;
+	size_t min_iqs;
 };
 
 static struct write_args_info conf;
 
 static struct stdin_task sit;
 
-static struct check_wav_task the_check_wav_task;
-static struct initial_delay_task the_initial_delay_task;
-
-static struct writer_node_group *wng;
-
 /** Length of a standard wav header. */
 #define WAV_HEADER_LEN 44
 
-/**
- * Test if audio buffer contains a valid wave header.
- *
- * \return If not, return -E_NO_WAV_HEADER, otherwise, return zero. If
- * there is less than WAV_HEADER_LEN bytes available, return one.
- */
-static void check_wav_pre_select(__a_unused struct sched *s, struct task *t)
+static void check_wav_pre_select(struct sched *s, struct task *t)
 {
 	struct check_wav_task *cwt = container_of(t, struct check_wav_task, task);
-	unsigned char *a;
 	int ret;
 
-	if (*cwt->loaded < WAV_HEADER_LEN) {
-		if (*cwt->input_error < 0)
-			t->error = *cwt->input_error;
-		return;
-	}
-	cwt->channels = 2;
-	cwt->samplerate = 44100;
-	a = (unsigned char*)cwt->buf;
-	if (a[0] != 'R' || a[1] != 'I' || a[2] != 'F' || a[3] != 'F') {
-		PARA_NOTICE_LOG("wav header not found\n");
-		t->error = -E_NO_WAV_HEADER;
-		goto out;
-	}
-	cwt->channels = (unsigned) a[22];
-	cwt->samplerate = a[24] + (a[25] << 8) + (a[26] << 16) + (a[27] << 24);
-	*cwt->loaded -= WAV_HEADER_LEN;
-	memmove(cwt->buf, cwt->buf + WAV_HEADER_LEN, *cwt->loaded);
-	t->error = -E_WAV_HEADER_SUCCESS;
-	PARA_INFO_LOG("channels: %d, sample rate: %d\n", cwt->channels, cwt->samplerate);
-out:
-	wng->channels = &cwt->channels;
-	wng->samplerate = &cwt->samplerate;
-	ret = wng_open(wng);
-	if (ret < 0)
-		t->error = ret;
-	s->timeout.tv_sec = 0;
-	s->timeout.tv_usec = 1;
+	ret = btr_node_status(cwt->btrn, cwt->min_iqs, BTR_NT_INTERNAL);
+	if (ret != 0)
+		sched_min_delay(s);
 }
 
-static void check_wav_pre_select_btr(__a_unused struct sched *s, struct task *t)
-{
-	struct check_wav_task_btr *cwt = container_of(t, struct check_wav_task_btr, task);
+#define HANDLE_EXEC(_cmd) \
+	if (!strcmp(cmd, #_cmd)) { \
+		if (!conf._cmd ## _given && cwt->state == CWS_NEED_HEADER) \
+			return -E_BTR_NAVAIL; \
+		*result = make_message("%d", cwt->state == CWS_NO_HEADER || conf._cmd ## _given? \
+			conf._cmd ## _arg : cwt->_cmd); \
+		return 1; \
+	} \
 
-	if (btr_get_input_queue_size(cwt->btrn) < WAV_HEADER_LEN)
-		return;
-	s->timeout.tv_sec = 0;
-	s->timeout.tv_usec = 1;
-}
 
 static int check_wav_exec(struct btr_node *btrn, const char *cmd, char **result)
 {
-	struct check_wav_task_btr *cwt = btr_context(btrn);
-
+	struct check_wav_task *cwt = btr_context(btrn);
 
-	if (!strcmp(cmd, "samplerate")) {
-		if (cwt->state != CWS_HAVE_HEADER)
-			return -ERRNO_TO_PARA_ERROR(ENAVAIL);
-		*result = make_message("%d", cwt->samplerate);
-		return 1;
-	}
-	if (!strcmp(cmd, "channels")) {
-		if (cwt->state != CWS_HAVE_HEADER)
-			return -ERRNO_TO_PARA_ERROR(ENAVAIL);
-		*result = make_message("%d", cwt->channels);
-		return 1;
-	}
+	HANDLE_EXEC(sample_rate);
+	HANDLE_EXEC(channels);
+	HANDLE_EXEC(sample_format);
 	return -ERRNO_TO_PARA_ERROR(ENOTSUP);
 }
 
-static void check_wav_post_select_btr(__a_unused struct sched *s, struct task *t)
+static void check_wav_post_select(__a_unused struct sched *s, struct task *t)
 {
-	struct check_wav_task_btr *cwt = container_of(t, struct check_wav_task_btr, task);
+	struct check_wav_task *cwt = container_of(t, struct check_wav_task, task);
+	struct btr_node *btrn = cwt->btrn;
 	unsigned char *a;
-	size_t sz = btr_get_input_queue_size(cwt->btrn);
+	size_t sz;
+	int ret;
+	uint16_t bps; /* bits per sample */
+	const char *sample_formats[] = {SAMPLE_FORMATS};
 
 	t->error = 0;
-	if (cwt->state != CWS_NEED_HEADER)
+	ret = btr_node_status(btrn, cwt->min_iqs, BTR_NT_INTERNAL);
+	if (ret <= 0)
 		goto out;
-	if (sz < WAV_HEADER_LEN) {
-		if (!btr_no_parent(cwt->btrn))
-			return;
-		if (sz != 0) {
-			cwt->state = CWS_NO_HEADER;
-			goto out;
-		}
-		t->error = -E_WRITE_EOF;
-		goto err;
-	}
-	cwt->channels = 2;
-	cwt->samplerate = 44100;
-	btr_next_buffer(cwt->btrn, (char **)&a);
-	if (a[0] != 'R' || a[1] != 'I' || a[2] != 'F' || a[3] != 'F') {
+	if (cwt->state != CWS_NEED_HEADER)
+		goto pushdown;
+	btr_merge(btrn, cwt->min_iqs);
+	sz = btr_next_buffer(btrn, (char **)&a);
+	if (sz < cwt->min_iqs) /* file size less than WAV_HEADER_SIZE */
+		goto pushdown;
+	cwt->min_iqs = 0;
+	/*
+	 * The default byte ordering assumed for WAVE data files is
+	 * little-endian. Files written using the big-endian byte ordering
+	 * scheme have the identifier RIFX instead of RIFF.
+	 */
+	if (a[0] != 'R' || a[1] != 'I' || a[2] != 'F' ||
+			(a[3] != 'F' && a[3] != 'X')) {
 		PARA_NOTICE_LOG("wav header not found\n");
 		cwt->state = CWS_NO_HEADER;
 		sprintf(t->status, "check wav: no header");
@@ -182,84 +120,36 @@ static void check_wav_post_select_btr(__a_unused struct sched *s, struct task *t
 	cwt->state = CWS_HAVE_HEADER;
 	sprintf(t->status, "check wav: have header");
 	cwt->channels = (unsigned) a[22];
-	cwt->samplerate = a[24] + (a[25] << 8) + (a[26] << 16) + (a[27] << 24);
-	PARA_INFO_LOG("channels: %d, sample rate: %d\n", cwt->channels, cwt->samplerate);
-	btr_consume(cwt->btrn, WAV_HEADER_LEN);
+	cwt->sample_rate = a[24] + (a[25] << 8) + (a[26] << 16) + (a[27] << 24);
+	bps = a[34] + ((unsigned)a[35] << 8);
+	if (bps != 8 && bps != 16) {
+		PARA_WARNING_LOG("%u bps not supported, assuming 16\n", bps);
+		bps = 16;
+	}
+	/*
+	 * 8-bit samples are stored as unsigned bytes, ranging from 0 to 255.
+	 * 16-bit samples are stored as 2's-complement signed integers, ranging
+	 * from -32768 to 32767.
+	 */
+	if (bps == 8)
+		cwt->sample_format = SF_U8;
+	else
+		cwt->sample_format = (a[3] == 'F')? SF_S16_LE : SF_S16_BE;
+	PARA_NOTICE_LOG("%dHz, %s, %s\n", cwt->sample_rate,
+		cwt->channels == 1? "mono" : "stereo",
+		sample_formats[cwt->sample_format]);
+	btr_consume(btrn, WAV_HEADER_LEN);
+pushdown:
+	btr_pushdown(btrn);
 out:
-	if (sz)
-		btr_pushdown(cwt->btrn);
-	else {
-		if (btr_no_parent(cwt->btrn))
-			t->error = -E_WRITE_EOF;
-	}
-err:
-	if (t->error < 0)
-		btr_del_node(cwt->btrn);
-}
-
-static void initial_delay_pre_select(struct sched *s, struct task *t)
-{
-	struct initial_delay_task *idt = container_of(t, struct initial_delay_task, task);
-	struct timeval diff;
-
-	if (!idt->start_time.tv_sec && !idt->start_time.tv_usec) {
-		t->error = -E_NO_DELAY;
-		goto register_check_wav;
-	}
-	if (tv_diff(now, &idt->start_time, &diff) > 0) {
-		t->error = -E_DELAY_TIMEOUT;
-		goto register_check_wav;
-	}
-	if (tv_diff(&s->timeout , &diff, NULL) > 0)
-		s->timeout = diff;
-	return;
-register_check_wav:
-	register_task(&the_check_wav_task.task);
-	s->timeout.tv_sec = 0;
-	s->timeout.tv_usec = 1;
+	t->error = ret;
+	if (ret < 0)
+		btr_remove_node(btrn);
 }
 
 static int loglevel;
 INIT_STDERR_LOGGING(loglevel)
 
-static struct writer_node_group *check_args(void)
-{
-	int i, ret = -E_WRITE_SYNTAX;
-	struct writer_node_group *g = NULL;
-	struct initial_delay_task *idt = &the_initial_delay_task;
-
-	loglevel = get_loglevel_by_name(conf.loglevel_arg);
-	if (conf.start_time_given) {
-		long unsigned sec, usec;
-		if (sscanf(conf.start_time_arg, "%lu:%lu",
-				&sec, &usec) != 2)
-			goto out;
-		idt->start_time.tv_sec = sec;
-		idt->start_time.tv_usec = usec;
-	}
-	if (!conf.writer_given) {
-		g = setup_default_wng();
-		ret = 1;
-		goto out;
-	}
-	g = wng_new(conf.writer_given);
-	ret = -E_WRITE_SYNTAX;
-	for (i = 0; i < conf.writer_given; i++) {
-		int writer_num;
-		g->writer_nodes[i].conf = check_writer_arg(
-			conf.writer_arg[i], &writer_num);
-		if (!g->writer_nodes[i].conf)
-			goto out;
-		g->writer_nodes[i].writer_num = writer_num;
-	}
-	ret = 1;
-out:
-	if (ret > 0)
-		return g;
-	free(g);
-	return NULL;
-}
-
 __noreturn static void print_help_and_die(void)
 {
 	int d = conf.detailed_help_given;
@@ -275,44 +165,43 @@ __noreturn static void print_help_and_die(void)
 	exit(0);
 }
 
-/*
- TODO: check wav, initial delay, multiple writers, non-default writers
- */
 static int main_btr(struct sched *s)
 {
 	int i, ret;
-	struct check_wav_task_btr _cwt, *cwt = &_cwt;
-	struct writer_node **wns;
+	struct check_wav_task _cwt, *cwt = &_cwt;
+	struct writer_node *wns;
 
-	sit.btrn = btr_new_node("stdin", NULL /* stdin has no parent */, NULL, NULL);
+	loglevel = get_loglevel_by_name(conf.loglevel_arg);
+	sit.btrn = btr_new_node(&(struct btr_node_description)
+		EMBRACE(.name = "stdin"));
 	stdin_set_defaults(&sit);
 	register_task(&sit.task);
 
 	cwt->state = CWS_NEED_HEADER;
-	cwt->btrn = btr_new_node("check wav", sit.btrn, check_wav_exec, cwt);
-	sprintf(cwt->task.status, "check wav");
-	cwt->task.pre_select = check_wav_pre_select_btr;
-	cwt->task.post_select = check_wav_post_select_btr;
+	cwt->min_iqs = WAV_HEADER_LEN;
+	cwt->btrn = btr_new_node(&(struct btr_node_description)
+		EMBRACE(.name = "check_wav", .parent = sit.btrn,
+		.handler = check_wav_exec, .context = cwt));
+	sprintf(cwt->task.status, "check_wav");
+	cwt->task.pre_select = check_wav_pre_select;
+	cwt->task.post_select = check_wav_post_select;
 	cwt->task.error = 0;
 	register_task(&cwt->task);
 
-	PARA_CRIT_LOG("writers:\n");
-
 	ret = -E_WRITE_SYNTAX;
 	if (!conf.writer_given) {
 		i = 0;
-		wns = para_malloc(sizeof(*wns));
-		wns[0] = setup_writer_node(NULL, cwt->btrn);
-		if (!wns[0])
+		wns = para_calloc(sizeof(*wns));
+		ret = setup_writer_node(NULL, cwt->btrn, wns);
+		if (ret < 0)
 			goto out;
 		i = 1;
 	} else {
-		wns = para_malloc(conf.writer_given * sizeof(*wns));
+		wns = para_calloc(conf.writer_given * sizeof(*wns));
 		for (i = 0; i < conf.writer_given; i++) {
-			PARA_CRIT_LOG("i: %d\n", i);
-			wns[i] = setup_writer_node(conf.writer_arg[i],
-				cwt->btrn);
-			if (!wns[i])
+			ret = setup_writer_node(conf.writer_arg[i],
+				cwt->btrn, wns + i);
+			if (ret < 0)
 				goto out;
 		}
 	}
@@ -322,15 +211,15 @@ static int main_btr(struct sched *s)
 	ret = schedule(s);
 out:
 	for (i--; i >= 0; i--) {
-		struct writer_node *wn = wns[i];
+		struct writer_node *wn = wns + i;
 		struct writer *w = writers + wn->writer_num;
 
 		w->close(wn);
-		btr_del_node(wn->btrn);
+		btr_free_node(wn->btrn);
 		free(wn->conf);
-		free(wn);
 	}
 	free(wns);
+	btr_free_node(cwt->btrn);
 	return ret;
 }
 
@@ -340,8 +229,8 @@ out:
  * \param argc The usual argument counter.
  * \param argv The usual argument vector.
  *
- * It registers the stdin task, the check_wav_task, the task for initial delay
- * and all tasks for actually writing out the stream.
+ * It sets up and starts the tasks and the buffer tree nodes determined by
+ * command line options.
  *
  * \return \p EXIT_SUCCESS or EXIT_FAILURE
  */
@@ -349,8 +238,6 @@ int main(int argc, char *argv[])
 {
 	int ret = -E_WRITE_SYNTAX;
 	static struct sched s;
-	struct check_wav_task *cwt = &the_check_wav_task;
-	struct initial_delay_task *idt = &the_initial_delay_task;
 
 	writer_init();
 	write_cmdline_parser(argc, argv, &conf);
@@ -358,43 +245,7 @@ int main(int argc, char *argv[])
 	if (conf.help_given || conf.detailed_help_given)
 		print_help_and_die();
 
-	if (conf.buffer_tree_given) {
-		ret = main_btr(&s);
-		goto out;
-	}
-	wng = check_args();
-	if (!wng)
-		goto out;
-	stdin_set_defaults(&sit);
-	ret = -ERRNO_TO_PARA_ERROR(EINVAL);
-	if (conf.bufsize_arg < 0)
-		goto out;
-	if (conf.bufsize_arg >= INT_MAX / 1024)
-		goto out;
-	sit.bufsize = conf.bufsize_arg * 1024;
-	sit.buf = para_malloc(sit.bufsize);
-
-	wng->bufp = &sit.buf;
-	wng->loaded = &sit.loaded;
-	wng->input_error = &sit.task.error;
-
-	register_task(&sit.task);
-
-	cwt->buf = sit.buf;
-	cwt->loaded = &sit.loaded;
-	cwt->input_error = &sit.task.error;
-	sprintf(cwt->task.status, "check wav");
-	cwt->task.pre_select = check_wav_pre_select;
-
-	idt->task.pre_select = initial_delay_pre_select;
-	sprintf(idt->task.status, "initial_delay");
-	register_task(&idt->task);
-
-	s.default_timeout.tv_sec = 10;
-	s.default_timeout.tv_usec = 0;
-	ret = schedule(&s);
-	wng_close(wng);
-out:
+	ret = main_btr(&s);
 	if (ret < 0) {
 		PARA_ERROR_LOG("%s\n", para_strerror(-ret));
 		exit(EXIT_FAILURE);