1 files changed, 127 insertions, 0 deletions
diff --git a/pjmedia/src/pjmedia/resample_speex.c b/pjmedia/src/pjmedia/resample_speex.c
new file mode 100644
index 0000000..c2b0e8c
--- /dev/null
+++ b/pjmedia/src/pjmedia/resample_speex.c
@@ -0,0 +1,127 @@
+/* $Id: resample_speex.c 3553 2011-05-05 06:14:19Z nanang $ */
+/* 
+ * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
+ * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
+ *
+ * This program 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
+ */
+#include <pjmedia/resample.h>
+#include <pjmedia/errno.h>
+#include <pj/assert.h>
+#include <pj/log.h>
+#include <pj/pool.h>
+
+#if PJMEDIA_RESAMPLE_IMP==PJMEDIA_RESAMPLE_SPEEX
+
+#include <speex/speex_resampler.h>
+
+#define THIS_FILE   "resample_speex.c"
+
+
+struct pjmedia_resample
+{
+    SpeexResamplerState *state;
+    unsigned		 in_samples_per_frame;
+    unsigned		 out_samples_per_frame;
+};
+
+
+PJ_DEF(pj_status_t) pjmedia_resample_create( pj_pool_t *pool,
+					     pj_bool_t high_quality,
+					     pj_bool_t large_filter,
+					     unsigned channel_count,
+					     unsigned rate_in,
+					     unsigned rate_out,
+					     unsigned samples_per_frame,
+					     pjmedia_resample **p_resample)
+{
+    pjmedia_resample *resample;
+    int quality;
+    int err;
+
+    PJ_ASSERT_RETURN(pool && p_resample && rate_in &&
+		     rate_out && samples_per_frame, PJ_EINVAL);
+
+    resample = PJ_POOL_ZALLOC_T(pool, pjmedia_resample);
+    PJ_ASSERT_RETURN(resample, PJ_ENOMEM);
+
+    if (high_quality) {
+	if (large_filter)
+	    quality = 10;
+	else
+	    quality = 7;
+    } else {
+	quality = 3;
+    }
+
+    resample->in_samples_per_frame = samples_per_frame;
+    resample->out_samples_per_frame = rate_out / (rate_in / samples_per_frame);
+    resample->state = speex_resampler_init(channel_count,  rate_in, rate_out, 
+                                           quality, &err);
+    if (resample->state == NULL || err != RESAMPLER_ERR_SUCCESS)
+	return PJ_ENOMEM;
+
+
+    *p_resample = resample;
+
+    PJ_LOG(5,(THIS_FILE, 
+	      "resample created: quality=%d, ch=%d, in/out rate=%d/%d", 
+	      quality, channel_count, rate_in, rate_out));
+    return PJ_SUCCESS;
+}
+
+
+PJ_DEF(void) pjmedia_resample_run( pjmedia_resample *resample,
+				   const pj_int16_t *input,
+				   pj_int16_t *output )
+{
+    spx_uint32_t in_length, out_length;
+
+    PJ_ASSERT_ON_FAIL(resample, return);
+
+    in_length = resample->in_samples_per_frame;
+    out_length = resample->out_samples_per_frame;
+
+    speex_resampler_process_interleaved_int(resample->state,
+					    (const __int16 *)input, &in_length,
+					    (__int16 *)output, &out_length);
+
+    pj_assert(in_length == resample->in_samples_per_frame);
+    pj_assert(out_length == resample->out_samples_per_frame);
+}
+
+
+PJ_DEF(unsigned) pjmedia_resample_get_input_size(pjmedia_resample *resample)
+{
+    PJ_ASSERT_RETURN(resample != NULL, 0);
+    return resample->in_samples_per_frame;
+}
+
+
+PJ_DEF(void) pjmedia_resample_destroy(pjmedia_resample *resample)
+{
+    PJ_ASSERT_ON_FAIL(resample, return);
+    if (resample->state) {
+	speex_resampler_destroy(resample->state);
+	resample->state = NULL;
+    }
+}
+
+#else /* PJMEDIA_RESAMPLE_IMP==PJMEDIA_RESAMPLE_SPEEX */
+
+int pjmedia_resample_speex_excluded;
+
+#endif	/* PJMEDIA_RESAMPLE_IMP==PJMEDIA_RESAMPLE_SPEEX */
+