comparison: src/mediastreamer/msGSMdecoder.c
src/mediastreamer/msGSMdecoder.c
- branch
- gaim
- changeset 20470
- 77693555855f
- parent 13071
- b98e72d4089a
- parent 20469
- b2836a24d81e
- child 20471
- 1966704b3e42
equal
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replaced
| 13071:b98e72d4089a | 20470:77693555855f |
|---|---|
| 1 /* | |
| 2 The mediastreamer library aims at providing modular media processing and I/O | |
| 3 for linphone, but also for any telephony application. | |
| 4 Copyright (C) 2001 Simon MORLAT simon.morlat@linphone.org | |
| 5 | |
| 6 This library is free software; you can redistribute it and/or | |
| 7 modify it under the terms of the GNU Lesser General Public | |
| 8 License as published by the Free Software Foundation; either | |
| 9 version 2.1 of the License, or (at your option) any later version. | |
| 10 | |
| 11 This library is distributed in the hope that it will be useful, | |
| 12 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 Lesser General Public License for more details. | |
| 15 | |
| 16 You should have received a copy of the GNU Lesser General Public | |
| 17 License along with this library; if not, write to the Free Software | |
| 18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 19 */ | |
| 20 | |
| 21 | |
| 22 #include "msGSMdecoder.h" | |
| 23 | |
| 24 extern MSFilter * ms_GSMencoder_new(void); | |
| 25 | |
| 26 MSCodecInfo GSMinfo={ | |
| 27 { | |
| 28 "GSM codec", | |
| 29 0, | |
| 30 MS_FILTER_AUDIO_CODEC, | |
| 31 ms_GSMencoder_new, | |
| 32 "This is the codec widely used in european mobile phones. This implementation was done by " | |
| 33 "Jutta Degener and Carsten Bormann." | |
| 34 }, | |
| 35 ms_GSMencoder_new, | |
| 36 ms_GSMdecoder_new, | |
| 37 320, | |
| 38 33, | |
| 39 13800, | |
| 40 8000, | |
| 41 3, | |
| 42 "GSM", | |
| 43 1, | |
| 44 1, | |
| 45 }; | |
| 46 | |
| 47 static MSGSMDecoderClass *ms_GSMdecoder_class=NULL; | |
| 48 | |
| 49 MSFilter * ms_GSMdecoder_new(void) | |
| 50 { | |
| 51 MSGSMDecoder *r; | |
| 52 | |
| 53 r=g_new(MSGSMDecoder,1); | |
| 54 ms_GSMdecoder_init(r); | |
| 55 if (ms_GSMdecoder_class==NULL) | |
| 56 { | |
| 57 ms_GSMdecoder_class=g_new(MSGSMDecoderClass,1); | |
| 58 ms_GSMdecoder_class_init(ms_GSMdecoder_class); | |
| 59 } | |
| 60 MS_FILTER(r)->klass=MS_FILTER_CLASS(ms_GSMdecoder_class); | |
| 61 return(MS_FILTER(r)); | |
| 62 } | |
| 63 | |
| 64 | |
| 65 /* FOR INTERNAL USE*/ | |
| 66 void ms_GSMdecoder_init(MSGSMDecoder *r) | |
| 67 { | |
| 68 ms_filter_init(MS_FILTER(r)); | |
| 69 MS_FILTER(r)->infifos=r->f_inputs; | |
| 70 MS_FILTER(r)->outfifos=r->f_outputs; | |
| 71 MS_FILTER(r)->r_mingran=33; | |
| 72 memset(r->f_inputs,0,sizeof(MSFifo*)*MSGSMDECODER_MAX_INPUTS); | |
| 73 memset(r->f_outputs,0,sizeof(MSFifo*)*MSGSMDECODER_MAX_INPUTS); | |
| 74 r->gsm_handle=gsm_create(); | |
| 75 } | |
| 76 | |
| 77 void ms_GSMdecoder_class_init(MSGSMDecoderClass *klass) | |
| 78 { | |
| 79 ms_filter_class_init(MS_FILTER_CLASS(klass)); | |
| 80 ms_filter_class_set_name(MS_FILTER_CLASS(klass),"GSMDecoder"); | |
| 81 MS_FILTER_CLASS(klass)->info=(MSFilterInfo*)&GSMinfo; | |
| 82 MS_FILTER_CLASS(klass)->max_finputs=MSGSMDECODER_MAX_INPUTS; | |
| 83 MS_FILTER_CLASS(klass)->max_foutputs=MSGSMDECODER_MAX_INPUTS; | |
| 84 MS_FILTER_CLASS(klass)->r_maxgran=33; | |
| 85 MS_FILTER_CLASS(klass)->w_maxgran=2*160; | |
| 86 MS_FILTER_CLASS(klass)->destroy=(MSFilterDestroyFunc)ms_GSMdecoder_destroy; | |
| 87 MS_FILTER_CLASS(klass)->process=(MSFilterProcessFunc)ms_GSMdecoder_process; | |
| 88 } | |
| 89 | |
| 90 void ms_GSMdecoder_process(MSGSMDecoder *r) | |
| 91 { | |
| 92 MSFifo *fi,*fo; | |
| 93 int err1; | |
| 94 void *s,*d; | |
| 95 | |
| 96 /* process output fifos, but there is only one for this class of filter*/ | |
| 97 | |
| 98 fi=r->f_inputs[0]; | |
| 99 fo=r->f_outputs[0]; | |
| 100 if (fi!=NULL) | |
| 101 { | |
| 102 err1=ms_fifo_get_read_ptr(fi,33,&s); | |
| 103 if (err1>0) | |
| 104 { | |
| 105 err1=ms_fifo_get_write_ptr(fo,160*2,&d); | |
| 106 if (d!=NULL) gsm_decode(r->gsm_handle,s,(gsm_signal*)d); | |
| 107 } | |
| 108 | |
| 109 } | |
| 110 } | |
| 111 | |
| 112 void ms_GSMdecoder_uninit(MSGSMDecoder *obj) | |
| 113 { | |
| 114 gsm_destroy(obj->gsm_handle); | |
| 115 } | |
| 116 | |
| 117 void ms_GSMdecoder_destroy( MSGSMDecoder *obj) | |
| 118 { | |
| 119 ms_GSMdecoder_uninit(obj); | |
| 120 g_free(obj); | |
| 121 } |
