1 files changed, 67 insertions, 0 deletions
diff --git a/modules/g7221/decode.c b/modules/g7221/decode.c
new file mode 100644
index 0000000..6977a12
--- /dev/null
+++ b/modules/g7221/decode.c
@@ -0,0 +1,67 @@
+/**
+ * @file g7221/decode.c G.722.1 Decode
+ *
+ * Copyright (C) 2010 Creytiv.com
+ */
+
+#include <re.h>
+#include <baresip.h>
+#include <g722_1.h>
+#include "g7221.h"
+
+
+struct audec_state {
+	g722_1_decode_state_t dec;
+};
+
+
+int g7221_decode_update(struct audec_state **adsp, const struct aucodec *ac,
+			const char *fmtp)
+{
+	const struct g7221_aucodec *g7221 = (struct g7221_aucodec *)ac;
+	struct audec_state *ads;
+	(void)fmtp;
+
+	if (!adsp || !ac)
+		return EINVAL;
+
+	ads = *adsp;
+
+	if (ads)
+		return 0;
+
+	ads = mem_alloc(sizeof(*ads), NULL);
+	if (!ads)
+		return ENOMEM;
+
+	if (!g722_1_decode_init(&ads->dec, g7221->bitrate, ac->srate)) {
+		mem_deref(ads);
+		return EPROTO;
+	}
+
+	*adsp = ads;
+
+	return 0;
+}
+
+
+int g7221_decode(struct audec_state *ads, int16_t *sampv, size_t *sampc,
+		 const uint8_t *buf, size_t len)
+{
+	size_t framec;
+
+	if (!ads || !sampv || !sampc || !buf)
+		return EINVAL;
+
+	framec = len / ads->dec.bytes_per_frame;
+
+	if (len != ads->dec.bytes_per_frame * framec)
+		return EPROTO;
+
+	if (*sampc < ads->dec.frame_size * framec)
+		return ENOMEM;
+
+	*sampc = g722_1_decode(&ads->dec, sampv, buf, (int)len);
+
+	return 0;
+}