1 files changed, 301 insertions, 0 deletions
diff --git a/trunk/codecs/codec_g722.c b/trunk/codecs/codec_g722.c
new file mode 100644
index 000000000..99c3856bc
--- /dev/null
+++ b/trunk/codecs/codec_g722.c
@@ -0,0 +1,301 @@
+/*
+ * Asterisk -- An open source telephony toolkit.
+ *
+ * Copyright (C) 1999 - 2008, Digium, Inc.
+ *
+ * Matthew Fredrickson <creslin@digium.com>
+ * Russell Bryant <russell@digium.com>
+ *
+ * Special thanks to Steve Underwood for the implementation
+ * and for doing the 8khz<->g.722 direct translation code.
+ *
+ * See http://www.asterisk.org for more information about
+ * the Asterisk project. Please do not directly contact
+ * any of the maintainers of this project for assistance;
+ * the project provides a web site, mailing lists and IRC
+ * channels for your use.
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License Version 2. See the LICENSE file
+ * at the top of the source tree.
+ */
+
+/*! \file
+ *
+ * \brief codec_g722.c - translate between signed linear and ITU G.722-64kbps
+ *
+ * \author Matthew Fredrickson <creslin@digium.com>
+ * \author Russell Bryant <russell@digium.com>
+ *
+ * \arg http://soft-switch.org/downloads/non-gpl-bits.tgz
+ * \arg http://lists.digium.com/pipermail/asterisk-dev/2006-September/022866.html
+ *
+ * \ingroup codecs
+ */
+
+#include "asterisk.h"
+
+ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
+
+#include "asterisk/linkedlists.h"
+#include "asterisk/module.h"
+#include "asterisk/config.h"
+#include "asterisk/translate.h"
+#include "asterisk/utils.h"
+
+#define BUFFER_SAMPLES   8096	/* size for the translation buffers */
+#define BUF_SHIFT	5
+
+/* Sample frame data */
+
+#include "g722/g722.h"
+#include "slin_g722_ex.h"
+#include "g722_slin_ex.h"
+
+struct g722_encoder_pvt {
+	g722_encode_state_t g722;
+};
+
+struct g722_decoder_pvt {
+	g722_decode_state_t g722;
+};
+
+/*! \brief init a new instance of g722_encoder_pvt. */
+static int lintog722_new(struct ast_trans_pvt *pvt)
+{
+	struct g722_encoder_pvt *tmp = pvt->pvt;
+
+	g722_encode_init(&tmp->g722, 64000, G722_SAMPLE_RATE_8000);
+
+	return 0;
+}
+
+static int lin16tog722_new(struct ast_trans_pvt *pvt)
+{
+	struct g722_encoder_pvt *tmp = pvt->pvt;
+
+	g722_encode_init(&tmp->g722, 64000, 0);
+
+	return 0;
+}
+
+/*! \brief init a new instance of g722_encoder_pvt. */
+static int g722tolin_new(struct ast_trans_pvt *pvt)
+{
+	struct g722_decoder_pvt *tmp = pvt->pvt;
+
+	g722_decode_init(&tmp->g722, 64000, G722_SAMPLE_RATE_8000);
+
+	return 0;
+}
+
+static int g722tolin16_new(struct ast_trans_pvt *pvt)
+{
+	struct g722_decoder_pvt *tmp = pvt->pvt;
+
+	g722_decode_init(&tmp->g722, 64000, 0);
+
+	return 0;
+}
+
+static int g722tolin_framein(struct ast_trans_pvt *pvt, struct ast_frame *f)
+{
+	struct g722_decoder_pvt *tmp = pvt->pvt;
+	int out_samples;
+
+	out_samples = g722_decode(&tmp->g722, (int16_t *) &pvt->outbuf[pvt->samples * sizeof(int16_t)], 
+		(uint8_t *) f->data, f->samples);
+
+	pvt->samples += out_samples;
+
+	pvt->datalen += (out_samples * sizeof(int16_t));
+
+	return 0;
+}
+
+static int lintog722_framein(struct ast_trans_pvt *pvt, struct ast_frame *f)
+{
+	struct g722_encoder_pvt *tmp = pvt->pvt;
+	int outlen;
+
+	outlen = g722_encode(&tmp->g722, (uint8_t *) (&pvt->outbuf[pvt->datalen]), 
+		(int16_t *) f->data, f->samples);
+
+	pvt->samples += outlen;
+
+	pvt->datalen += outlen;
+
+	return 0;
+}
+
+static struct ast_frame *g722tolin_sample(void)
+{
+	static struct ast_frame f = {
+		.frametype = AST_FRAME_VOICE,
+		.subclass = AST_FORMAT_G722,
+		.datalen = sizeof(g722_slin_ex),
+		.samples = sizeof(g722_slin_ex) * 2,
+		.src = __PRETTY_FUNCTION__,
+		.data = g722_slin_ex,
+	};
+
+	return &f;
+}
+
+static struct ast_frame *g722tolin16_sample(void)
+{
+	static struct ast_frame f = {
+		.frametype = AST_FRAME_VOICE,
+		.subclass = AST_FORMAT_G722,
+		.datalen = sizeof(slin_g722_ex),
+		.samples = sizeof(slin_g722_ex) * 2,
+		.src = __PRETTY_FUNCTION__,
+		.data = slin_g722_ex,
+	};
+
+	return &f;
+}
+
+static struct ast_frame *lintog722_sample (void)
+{
+	static struct ast_frame f = {
+		.frametype = AST_FRAME_VOICE,
+		.subclass = AST_FORMAT_SLINEAR,
+		.datalen = sizeof(slin_g722_ex),
+		.samples = sizeof(slin_g722_ex) / sizeof(slin_g722_ex[0]),
+		.src = __PRETTY_FUNCTION__,
+		.data = slin_g722_ex,
+	};
+
+	return &f;
+}
+
+static struct ast_frame *lin16tog722_sample (void)
+{
+	static struct ast_frame f = {
+		.frametype = AST_FRAME_VOICE,
+		.subclass = AST_FORMAT_SLINEAR16,
+		.datalen = sizeof(slin_g722_ex),
+		.samples = sizeof(slin_g722_ex) / sizeof(slin_g722_ex[0]),
+		.src = __PRETTY_FUNCTION__,
+		.data = slin_g722_ex,
+	};
+
+	return &f;
+}
+
+static struct ast_translator g722tolin = {
+	.name = "g722tolin",
+	.srcfmt = AST_FORMAT_G722,
+	.dstfmt = AST_FORMAT_SLINEAR,
+	.newpvt = g722tolin_new,	/* same for both directions */
+	.framein = g722tolin_framein,
+	.sample = g722tolin_sample,
+	.desc_size = sizeof(struct g722_decoder_pvt),
+	.buffer_samples = BUFFER_SAMPLES / sizeof(int16_t),
+	.buf_size = BUFFER_SAMPLES,
+	.plc_samples = 160,
+};
+
+static struct ast_translator lintog722 = {
+	.name = "lintog722",
+	.srcfmt = AST_FORMAT_SLINEAR,
+	.dstfmt = AST_FORMAT_G722,
+	.newpvt = lintog722_new,	/* same for both directions */
+	.framein = lintog722_framein,
+	.sample = lintog722_sample,
+	.desc_size = sizeof(struct g722_encoder_pvt),
+	.buffer_samples = BUFFER_SAMPLES * 2,
+	.buf_size = BUFFER_SAMPLES,
+};
+
+static struct ast_translator g722tolin16 = {
+	.name = "g722tolin16",
+	.srcfmt = AST_FORMAT_G722,
+	.dstfmt = AST_FORMAT_SLINEAR16,
+	.newpvt = g722tolin16_new,	/* same for both directions */
+	.framein = g722tolin_framein,
+	.sample = g722tolin16_sample,
+	.desc_size = sizeof(struct g722_decoder_pvt),
+	.buffer_samples = BUFFER_SAMPLES / sizeof(int16_t),
+	.buf_size = BUFFER_SAMPLES,
+	.plc_samples = 160,
+};
+
+static struct ast_translator lin16tog722 = {
+	.name = "lin16tog722",
+	.srcfmt = AST_FORMAT_SLINEAR16,
+	.dstfmt = AST_FORMAT_G722,
+	.newpvt = lin16tog722_new,	/* same for both directions */
+	.framein = lintog722_framein,
+	.sample = lin16tog722_sample,
+	.desc_size = sizeof(struct g722_encoder_pvt),
+	.buffer_samples = BUFFER_SAMPLES * 2,
+	.buf_size = BUFFER_SAMPLES,
+};
+
+static int parse_config(int reload)
+{
+	struct ast_variable *var;
+	struct ast_flags config_flags = { reload ? CONFIG_FLAG_FILEUNCHANGED : 0 };
+	struct ast_config *cfg = ast_config_load("codecs.conf", config_flags);
+
+	if (cfg == NULL)
+		return 0;
+	if (cfg == CONFIG_STATUS_FILEUNCHANGED)
+		return 0;
+	for (var = ast_variable_browse(cfg, "plc"); var; var = var->next) {
+		if (!strcasecmp(var->name, "genericplc")) {
+			g722tolin.useplc = ast_true(var->value) ? 1 : 0;
+			ast_verb(3, "codec_g722: %susing generic PLC\n",
+					g722tolin.useplc ? "" : "not ");
+		}
+	}
+	ast_config_destroy(cfg);
+	return 0;
+}
+
+static int reload(void)
+{
+	if (parse_config(1))
+		return AST_MODULE_LOAD_DECLINE;
+	return AST_MODULE_LOAD_SUCCESS;
+}
+
+static int unload_module(void)
+{
+	int res = 0;
+
+	res |= ast_unregister_translator(&g722tolin);
+	res |= ast_unregister_translator(&lintog722);
+	res |= ast_unregister_translator(&g722tolin16);
+	res |= ast_unregister_translator(&lin16tog722);
+
+	return res;
+}
+
+static int load_module(void)
+{
+	int res = 0;
+
+	if (parse_config(0))
+		return AST_MODULE_LOAD_DECLINE;
+
+	res |= ast_register_translator(&g722tolin);
+	res |= ast_register_translator(&lintog722);
+	res |= ast_register_translator(&g722tolin16);
+	res |= ast_register_translator(&lin16tog722);
+
+	if (res) {
+		unload_module();
+		return AST_MODULE_LOAD_FAILURE;
+	}	
+
+	return AST_MODULE_LOAD_SUCCESS;
+}
+
+AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "ITU G.722-64kbps G722 Transcoder",
+		.load = load_module,
+		.unload = unload_module,
+		.reload = reload,
+	       );