--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/mediastreamer/msMUlawenc.c Wed Nov 09 08:07:20 2005 +0000
@@ -0,0 +1,99 @@
+ /*
+ The mediastreamer library aims at providing modular media processing and I/O
+ for linphone, but also for any telephony application.
+ Copyright (C) 2001 Simon MORLAT simon.morlat@linphone.org
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+*/
+
+
+#include "msMUlawenc.h"
+#include "g711common.h"
+
+extern MSCodecInfo MULAWinfo;
+
+static MSMULAWEncoderClass *ms_MULAWencoder_class=NULL;
+
+MSFilter * ms_MULAWencoder_new(void)
+{
+ MSMULAWEncoder *r;
+
+ r=g_new(MSMULAWEncoder,1);
+ ms_MULAWencoder_init(r);
+ if (ms_MULAWencoder_class==NULL)
+ {
+ ms_MULAWencoder_class=g_new(MSMULAWEncoderClass,1);
+ ms_MULAWencoder_class_init(ms_MULAWencoder_class);
+ }
+ MS_FILTER(r)->klass=MS_FILTER_CLASS(ms_MULAWencoder_class);
+ return(MS_FILTER(r));
+}
+
+
+/* FOR INTERNAL USE*/
+void ms_MULAWencoder_init(MSMULAWEncoder *r)
+{
+ ms_filter_init(MS_FILTER(r));
+ MS_FILTER(r)->infifos=r->f_inputs;
+ MS_FILTER(r)->outfifos=r->f_outputs;
+ MS_FILTER(r)->r_mingran=MULAW_ENCODER_RMAXGRAN; /* the filter can be called as soon as there is
+ something to process */
+ memset(r->f_inputs,0,sizeof(MSFifo*)*MSMULAWENCODER_MAX_INPUTS);
+ memset(r->f_outputs,0,sizeof(MSFifo*)*MSMULAWENCODER_MAX_INPUTS);
+
+}
+
+void ms_MULAWencoder_class_init(MSMULAWEncoderClass *klass)
+{
+ ms_filter_class_init(MS_FILTER_CLASS(klass));
+ ms_filter_class_set_name(MS_FILTER_CLASS(klass),"MULAWEncoder");
+ MS_FILTER_CLASS(klass)->info=(MSFilterInfo*)&MULAWinfo;
+ MS_FILTER_CLASS(klass)->max_finputs=MSMULAWENCODER_MAX_INPUTS;
+ MS_FILTER_CLASS(klass)->max_foutputs=MSMULAWENCODER_MAX_INPUTS;
+ MS_FILTER_CLASS(klass)->r_maxgran=MULAW_ENCODER_RMAXGRAN;
+ MS_FILTER_CLASS(klass)->w_maxgran=MULAW_ENCODER_WMAXGRAN;
+ MS_FILTER_CLASS(klass)->destroy=(MSFilterDestroyFunc)ms_MULAWencoder_destroy;
+ MS_FILTER_CLASS(klass)->process=(MSFilterProcessFunc)ms_MULAWencoder_process;
+}
+
+void ms_MULAWencoder_process(MSMULAWEncoder *r)
+{
+ MSFifo *fi,*fo;
+ int inlen,outlen;
+ gchar *s,*d;
+ int i;
+ /* process output fifos, but there is only one for this class of filter*/
+
+ fi=r->f_inputs[0];
+ fo=r->f_outputs[0];
+ inlen=ms_fifo_get_read_ptr(fi,MULAW_ENCODER_RMAXGRAN,(void**)&s);
+ outlen=ms_fifo_get_write_ptr(fo,MULAW_ENCODER_WMAXGRAN,(void**)&d);
+ if (d!=NULL)
+ {
+ for(i=0;i<MULAW_ENCODER_WMAXGRAN;i++)
+ {
+ d[i]=s16_to_ulaw( *((gint16*)s) );
+ s+=2;
+ }
+ }
+ else g_warning("MSMULAWDecoder: Discarding samples !!");
+}
+
+
+
+void ms_MULAWencoder_destroy( MSMULAWEncoder *obj)
+{
+ g_free(obj);
+}