X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=write.c;h=f79daf237e286dfc6821d06ad93dfdaa49bab84a;hp=34cea48c6a81ab2d7d6743e28706181415362824;hb=aa234b7afe223879a7bd7274ce05a3a315a2ec49;hpb=05527588bd503e4748d801b641a9e3a6556525ad

diff --git a/write.c b/write.c
index 34cea48c..f79daf23 100644
--- a/write.c
+++ b/write.c
@@ -9,6 +9,7 @@
 #include <regex.h>
 #include <sys/types.h>
 #include <dirent.h>
+#include <stdbool.h>
 
 #include "para.h"
 #include "string.h"
@@ -17,6 +18,7 @@
 #include "sched.h"
 #include "ggo.h"
 #include "stdin.h"
+#include "buffer_tree.h"
 #include "write.h"
 #include "write_common.h"
 #include "fd.h"
@@ -40,6 +42,23 @@ struct check_wav_task {
 	struct task task;
 };
 
+enum check_wav_state {
+	CWS_NEED_HEADER,
+	CWS_HAVE_HEADER,
+	CWS_NO_HEADER,
+};
+
+struct check_wav_task_btr {
+	int state;
+	/** 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;
+	struct btr_node *btrn;
+};
+
 /** Delay writing until given time. */
 struct initial_delay_task {
 	/** The time the first data should be written out. */
@@ -101,6 +120,83 @@ out:
 	s->timeout.tv_usec = 1;
 }
 
+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);
+
+	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);
+
+
+	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;
+	}
+	return -ERRNO_TO_PARA_ERROR(ENOTSUP);
+}
+
+static void check_wav_post_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);
+	unsigned char *a;
+	size_t sz = btr_get_input_queue_size(cwt->btrn);
+
+	t->error = 0;
+	if (cwt->state != CWS_NEED_HEADER)
+		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') {
+		PARA_NOTICE_LOG("wav header not found\n");
+		cwt->state = CWS_NO_HEADER;
+		sprintf(t->status, "check wav: no header");
+		goto out;
+	}
+	PARA_INFO_LOG("found wav header\n");
+	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);
+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_remove_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);
@@ -179,6 +275,65 @@ __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;
+
+	sit.btrn = btr_new_node("stdin", NULL /* stdin has no parent */, NULL, NULL);
+	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->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])
+			goto out;
+		i = 1;
+	} else {
+		wns = para_malloc(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])
+				goto out;
+		}
+	}
+
+	s->default_timeout.tv_sec = 10;
+	s->default_timeout.tv_usec = 50000;
+	ret = schedule(s);
+out:
+	for (i--; i >= 0; i--) {
+		struct writer_node *wn = wns[i];
+		struct writer *w = writers + wn->writer_num;
+
+		w->close(wn);
+		btr_free_node(wn->btrn);
+		free(wn->conf);
+		free(wn);
+	}
+	free(wns);
+	return ret;
+}
+
 /**
  * Para_write's main function.
  *
@@ -203,6 +358,10 @@ 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;