procqueue: Add some mechanism to queue 'processing items' on the frames

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>

include/gapk/procqueue.h

@@ -0,0 +1,43 @@
+/* Processing Queue Management */
+
+/*
+ * This file is part of gapk (GSM Audio Pocket Knife).
+ *
+ * gapk is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * gapk is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with gapk.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GAPK_PROCQUEUE_H__
+#define __GAPK_PROCQUEUE_H__
+
+#include <stdint.h>
+#include <stdio.h> /* for FILE */
+
+struct pq;
+
+struct pq_item {
+	int len_in;
+	int len_out;
+	void *state;
+	int  (*proc)(void *state, uint8_t *out, const uint8_t *in);
+	void (*exit)(void *state);
+};
+
+/* Management */
+struct pq *		pq_create(void);
+void			pq_destroy(struct pq *pq);
+struct pq_item *	pq_add_item(struct pq *pq);
+int			pq_prepare(struct pq *pq);
+int			pq_execute(struct pq *pq);
+
+#endif /* __GAPK_PROCQUEUE_H__ */

src/Makefile.am

@@ -4,5 +4,6 @@ AM_LDFLAGS=$(LIBOSMOCODEC_LIBS) ${OPENCORE_AMRNB_LIBS} ${LIBGSM_LIBS}
 
 bin_PROGRAMS = gapk
 gapk_SOURCES =	main.c	\
+		procqueue.c \
 		formats.c fmt_amr.c fmt_gsm.c fmt_hr_ref.c fmt_racal.c \
 		codecs.c codec_pcm.c codec_hr.c codec_fr.c codec_efr.c

src/procqueue.c

@@ -0,0 +1,132 @@
+/* Processing Queue Management */
+
+/*
+ * This file is part of gapk (GSM Audio Pocket Knife).
+ *
+ * gapk is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * gapk is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with gapk.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <errno.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+#include <gapk/procqueue.h>
+
+
+#define MAX_PQ_ITEMS	8
+
+struct pq {
+	int		n_items;
+	struct pq_item* items[MAX_PQ_ITEMS];
+	void *		buffers[MAX_PQ_ITEMS+1];
+};
+
+
+struct pq *
+pq_create(void)
+{
+	return (struct pq *) calloc(1, sizeof(struct pq));
+}
+
+void
+pq_destroy(struct pq *pq)
+{
+	int i;
+
+	if (!pq)
+		return;
+
+	for (i=0; i<pq->n_items; i++) {
+		if (!pq->items[i])
+			continue;
+		if (pq->items[i]->exit)
+			pq->items[i]->exit(pq->items[i]->state);
+		free(pq->items[i]);
+	}
+
+	for (i=0; i<pq->n_items-1; i++)
+		free(pq->buffers[i]); /* free is NULL safe */
+
+	free(pq);
+}
+
+struct pq_item *
+pq_add_item(struct pq *pq)
+{
+	struct pq_item *item;
+
+	if (pq->n_items == MAX_PQ_ITEMS)
+		return NULL;
+
+	item = calloc(1, sizeof(struct pq_item));
+	if (!item)
+		return NULL;
+
+	pq->items[pq->n_items++] = item;
+
+	return item;
+}
+
+int
+pq_prepare(struct pq *pq)
+{
+	int i;
+	unsigned int len_prev;
+
+	len_prev = 0;
+
+	for (i=0; i<pq->n_items; i++) {
+		struct pq_item *item = pq->items[i];
+
+		if (item->len_in != len_prev)
+			return -EINVAL;
+
+		if (i < (pq->n_items-1)) {
+			pq->buffers[i] = malloc(item->len_out);
+			if (!pq->buffers[i])
+				return -ENOMEM;
+		} else{
+			if (item->len_out)
+				return -EINVAL;
+		}
+
+		len_prev = item->len_out;
+	}
+
+	return 0;
+}
+
+int
+pq_execute(struct pq *pq)
+{
+	int i;
+	void *buf_prev, *buf;
+
+	buf_prev = NULL;
+
+	for (i=0; i<pq->n_items; i++) {
+		int rv;
+		struct pq_item *item = pq->items[i];
+
+		buf = i < (pq->n_items-1) ? pq->buffers[i] : NULL;
+
+		rv = item->proc(item->state, buf, buf_prev);
+		if (rv)
+			return rv;
+
+		buf_prev = buf;
+	}
+
+	return 0;
+}