--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/mediastreamer/mscodec.c Wed Nov 09 08:07:20 2005 +0000
@@ -0,0 +1,257 @@
+/*
+ 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 "mscodec.h"
+
+#ifdef SME
+#include "msGSMdecoder.h"
+#include "msLPC10decoder.h"
+#endif
+#include "msMUlawdec.h"
+#include "msAlawdec.h"
+
+#ifdef TRUESPEECH
+extern MSCodecInfo TrueSpeechinfo;
+#endif
+
+#ifdef VIDEO_ENABLED
+extern void ms_AVCodec_init();
+#endif
+
+#define UDP_HDR_SZ 8
+#define RTP_HDR_SZ 12
+#define IP4_HDR_SZ 20 /*20 is the minimum, but there may be some options*/
+
+
+
+
+/* register all statically linked codecs */
+void ms_codec_register_all()
+{
+// ms_filter_register(MS_FILTER_INFO(&GSMinfo));
+// ms_filter_register(MS_FILTER_INFO(&LPC10info));
+ ms_filter_register(MS_FILTER_INFO(&MULAWinfo));
+ ms_filter_register(MS_FILTER_INFO(&ALAWinfo));
+#ifdef TRUESPEECH
+ ms_filter_register(MS_FILTER_INFO(&TrueSpeechinfo));
+#endif
+#ifdef VIDEO_ENABLED
+ ms_AVCodec_init();
+#endif
+
+}
+
+/* returns a list of MSCodecInfo */
+GList * ms_codec_get_all_audio()
+{
+ GList *audio_codecs=NULL;
+ GList *elem=filter_list;
+ MSFilterInfo *info;
+ while (elem!=NULL)
+ {
+ info=(MSFilterInfo *)elem->data;
+ if (info->type==MS_FILTER_AUDIO_CODEC){
+ audio_codecs=g_list_append(audio_codecs,info);
+ }
+ elem=g_list_next(elem);
+ }
+ return audio_codecs;
+}
+
+
+MSCodecInfo * ms_audio_codec_info_get(gchar *name)
+{
+ GList *elem=filter_list;
+ MSFilterInfo *info;
+ while (elem!=NULL)
+ {
+ info=(MSFilterInfo *)elem->data;
+ if ( (info->type==MS_FILTER_AUDIO_CODEC) ){
+ MSCodecInfo *codinfo=(MSCodecInfo *)info;
+ if (strcmp(codinfo->description,name)==0){
+ return MS_CODEC_INFO(info);
+ }
+ }
+ elem=g_list_next(elem);
+ }
+ return NULL;
+}
+
+MSCodecInfo * ms_video_codec_info_get(gchar *name)
+{
+ GList *elem=filter_list;
+ MSFilterInfo *info;
+ while (elem!=NULL)
+ {
+ info=(MSFilterInfo *)elem->data;
+ if ( (info->type==MS_FILTER_VIDEO_CODEC) ){
+ MSCodecInfo *codinfo=(MSCodecInfo *)info;
+ if (strcmp(codinfo->description,name)==0){
+ return MS_CODEC_INFO(info);
+ }
+ }
+ elem=g_list_next(elem);
+ }
+ return NULL;
+}
+
+/* returns a list of MSCodecInfo */
+GList * ms_codec_get_all_video()
+{
+ GList *video_codecs=NULL;
+ GList *elem=filter_list;
+ MSFilterInfo *info;
+ while (elem!=NULL)
+ {
+ info=(MSFilterInfo *)elem->data;
+ if (info->type==MS_FILTER_VIDEO_CODEC){
+ video_codecs=g_list_append(video_codecs,info);
+ }
+ elem=g_list_next(elem);
+ }
+ return video_codecs;
+}
+
+MSFilter * ms_encoder_new(gchar *name)
+{
+ GList *elem=filter_list;
+ MSFilterInfo *info;
+ while (elem!=NULL)
+ {
+ info=(MSFilterInfo *)elem->data;
+ if ((info->type==MS_FILTER_AUDIO_CODEC) || (info->type==MS_FILTER_VIDEO_CODEC)){
+ MSCodecInfo *codinfo=(MSCodecInfo *)elem->data;
+ if (strcmp(info->name,name)==0){
+ return codinfo->encoder();
+ }
+ }
+ elem=g_list_next(elem);
+ }
+ return NULL;
+}
+
+MSFilter * ms_decoder_new(gchar *name)
+{
+ GList *elem=filter_list;
+ MSFilterInfo *info;
+ while (elem!=NULL)
+ {
+ info=(MSFilterInfo *)elem->data;
+ if ((info->type==MS_FILTER_AUDIO_CODEC) || (info->type==MS_FILTER_VIDEO_CODEC)){
+ MSCodecInfo *codinfo=(MSCodecInfo *)elem->data;
+ if (strcmp(info->name,name)==0){
+ return codinfo->decoder();
+ }
+ }
+ elem=g_list_next(elem);
+ }
+ return NULL;
+}
+
+MSFilter * ms_encoder_new_with_pt(gint pt)
+{
+ GList *elem=filter_list;
+ MSFilterInfo *info;
+ while (elem!=NULL)
+ {
+ info=(MSFilterInfo *)elem->data;
+ if ((info->type==MS_FILTER_AUDIO_CODEC) || (info->type==MS_FILTER_VIDEO_CODEC)){
+ MSCodecInfo *codinfo=(MSCodecInfo *)elem->data;
+ if (codinfo->pt==pt){
+ return codinfo->encoder();
+ }
+ }
+ elem=g_list_next(elem);
+ }
+ return NULL;
+}
+
+MSFilter * ms_decoder_new_with_pt(gint pt)
+{
+ GList *elem=filter_list;
+ MSFilterInfo *info;
+ while (elem!=NULL)
+ {
+ info=(MSFilterInfo *)elem->data;
+ if ((info->type==MS_FILTER_AUDIO_CODEC) || (info->type==MS_FILTER_VIDEO_CODEC)){
+ MSCodecInfo *codinfo=(MSCodecInfo *)elem->data;
+ if (codinfo->pt==pt){
+ return codinfo->decoder();
+ }
+ }
+ elem=g_list_next(elem);
+ }
+ return NULL;
+}
+
+MSFilter * ms_decoder_new_with_string_id(gchar *id)
+{
+ GList *elem=filter_list;
+ MSFilterInfo *info;
+ while (elem!=NULL)
+ {
+ info=(MSFilterInfo *)elem->data;
+ if ((info->type==MS_FILTER_AUDIO_CODEC) || (info->type==MS_FILTER_VIDEO_CODEC)){
+ MSCodecInfo *codinfo=(MSCodecInfo *)elem->data;
+ if (strcasecmp(codinfo->description,id)==0){
+ return codinfo->decoder();
+ }
+ }
+ elem=g_list_next(elem);
+ }
+ return NULL;
+}
+
+MSFilter * ms_encoder_new_with_string_id(gchar *id)
+{
+ GList *elem=filter_list;
+ MSFilterInfo *info;
+ while (elem!=NULL)
+ {
+ info=(MSFilterInfo *)elem->data;
+ if ((info->type==MS_FILTER_AUDIO_CODEC) || (info->type==MS_FILTER_VIDEO_CODEC)){
+ MSCodecInfo *codinfo=(MSCodecInfo *)elem->data;
+ if (strcasecmp(codinfo->description,id)==0){
+ return codinfo->encoder();
+ }
+ }
+ elem=g_list_next(elem);
+ }
+ return NULL;
+}
+/* return 0 if codec can be used with bandwidth, -1 else*/
+int ms_codec_is_usable(MSCodecInfo *codec,double bandwidth)
+{
+ double codec_band;
+ double npacket;
+ double packet_size;
+
+ if (((MSFilterInfo*)codec)->type==MS_FILTER_AUDIO_CODEC)
+ {
+ /* calculate the total bandwdith needed by codec (including headers for rtp, udp, ip)*/
+ /* number of packet per second*/
+ npacket=2.0*(double)(codec->rate)/(double)(codec->fr_size);
+ packet_size=(double)(codec->dt_size)+UDP_HDR_SZ+RTP_HDR_SZ+IP4_HDR_SZ;
+ codec_band=packet_size*8.0*npacket;
+ }
+ else return -1;
+ return(codec_band<bandwidth);
+}