baresip 0.4.10

2 files changed, 183 insertions, 0 deletions

diff --git a/modules/gsm/gsm.c b/modules/gsm/gsm.c
new file mode 100644
index 0000000..798bae7
--- /dev/null
+++ b/modules/gsm/gsm.c
@@ -0,0 +1,171 @@
+/**
+ * @file gsm.c  GSM Audio Codec
+ *
+ * Copyright (C) 2010 Creytiv.com
+ */
+#include <gsm.h> /* please report if you have problems finding this file */
+#include <re.h>
+#include <baresip.h>
+
+
+enum {
+	FRAME_SIZE = 160
+};
+
+
+struct auenc_state {
+	gsm enc;
+};
+
+struct audec_state {
+	gsm dec;
+};
+
+
+static void encode_destructor(void *arg)
+{
+	struct auenc_state *st = arg;
+
+	gsm_destroy(st->enc);
+}
+
+
+static void decode_destructor(void *arg)
+{
+	struct audec_state *st = arg;
+
+	gsm_destroy(st->dec);
+}
+
+
+static int encode_update(struct auenc_state **aesp, const struct aucodec *ac,
+			 struct auenc_param *prm, const char *fmtp)
+{
+	struct auenc_state *st;
+	int err = 0;
+	(void)ac;
+	(void)prm;
+	(void)fmtp;
+
+	if (!aesp)
+		return EINVAL;
+	if (*aesp)
+		return 0;
+
+	st = mem_zalloc(sizeof(*st), encode_destructor);
+	if (!st)
+		return ENOMEM;
+
+	st->enc = gsm_create();
+	if (!st->enc) {
+		err = EPROTO;
+		goto out;
+	}
+
+ out:
+	if (err)
+		mem_deref(st);
+	else
+		*aesp = st;
+
+	return err;
+}
+
+
+static int decode_update(struct audec_state **adsp,
+			 const struct aucodec *ac, const char *fmtp)
+{
+	struct audec_state *st;
+	int err = 0;
+	(void)ac;
+	(void)fmtp;
+
+	if (!adsp)
+		return EINVAL;
+	if (*adsp)
+		return 0;
+
+	st = mem_zalloc(sizeof(*st), decode_destructor);
+	if (!st)
+		return ENOMEM;
+
+	st->dec = gsm_create();
+	if (!st->dec) {
+		err = EPROTO;
+		goto out;
+	}
+
+ out:
+	if (err)
+		mem_deref(st);
+	else
+		*adsp = st;
+
+	return err;
+}
+
+
+static int encode(struct auenc_state *st, uint8_t *buf, size_t *len,
+		  const int16_t *sampv, size_t sampc)
+{
+	if (sampc != FRAME_SIZE)
+		return EPROTO;
+	if (*len < sizeof(gsm_frame))
+		return ENOMEM;
+
+	gsm_encode(st->enc, (gsm_signal *)sampv, buf);
+
+	*len = sizeof(gsm_frame);
+
+	return 0;
+}
+
+
+static int decode(struct audec_state *st, int16_t *sampv, size_t *sampc,
+		  const uint8_t *buf, size_t len)
+{
+	int ret;
+
+	if (*sampc < FRAME_SIZE)
+		return ENOMEM;
+	if (len < sizeof(gsm_frame))
+		return EBADMSG;
+
+	ret = gsm_decode(st->dec, (gsm_byte *)buf, (gsm_signal *)sampv);
+	if (ret)
+		return EPROTO;
+
+	*sampc = 160;
+
+	return 0;
+}
+
+
+static struct aucodec ac_gsm = {
+	LE_INIT, "3", "GSM", 8000, 1, NULL,
+	encode_update, encode, decode_update, decode, NULL, NULL, NULL
+};
+
+
+static int module_init(void)
+{
+	debug("gsm: GSM v%u.%u.%u\n", GSM_MAJOR, GSM_MINOR, GSM_PATCHLEVEL);
+
+	aucodec_register(&ac_gsm);
+	return 0;
+}
+
+
+static int module_close(void)
+{
+	aucodec_unregister(&ac_gsm);
+	return 0;
+}
+
+
+EXPORT_SYM const struct mod_export DECL_EXPORTS(gsm) = {
+	"gsm",
+	"codec",
+	module_init,
+	module_close
+};
diff --git a/modules/gsm/module.mk b/modules/gsm/module.mk
new file mode 100644
index 0000000..48c8ff0
--- /dev/null
+++ b/modules/gsm/module.mk
@@ -0,0 +1,12 @@
+#
+# module.mk
+#
+# Copyright (C) 2010 Creytiv.com
+#
+
+MOD		:= gsm
+$(MOD)_SRCS	+= gsm.c
+$(MOD)_LFLAGS	+= -L$(SYSROOT)/lib -lgsm
+CFLAGS		+= -I$(SYSROOT)/include/gsm -I$(SYSROOT)/local/include
+
+include mk/mod.mk