/* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include #ifdef HAVE_ILBC #include #include #include "msilbcenc.h" extern MSCodecInfo ilbc_info; /* The return value of each of these calls is the same as that returned by fread/fwrite, which should be the number of samples successfully read/written, not the number of bytes. */ int ilbc_read_16bit_samples(gint16 int16samples[], float speech[], int n) { int i; /* Convert 16 bit integer samples to floating point values in the range [-1,+1]. */ for (i = 0; i < n; i++) { speech[i] = int16samples[i]; } return (n); } int ilbc_write_16bit_samples(gint16 int16samples[], float speech[], int n) { int i; float real_sample; /* Convert floating point samples in range [-1,+1] to 16 bit integers. */ for (i = 0; i < n; i++) { float dtmp=speech[i]; if (dtmpMAX_SAMPLE) dtmp=MAX_SAMPLE; int16samples[i] = (short) dtmp; } return (n); } /* Write the bits in bits[0] through bits[len-1] to file f, in "packed" format. bits is expected to be an array of len integer values, where each integer is 0 to represent a 0 bit, and any other value represents a 1 bit. This bit string is written to the file f in the form of several 8 bit characters. If len is not a multiple of 8, then the last character is padded with 0 bits -- the padding is in the least significant bits of the last byte. The 8 bit characters are "filled" in order from most significant bit to least significant. */ void ilbc_write_bits(unsigned char *data, unsigned char *bits, int nbytes) { memcpy(data, bits, nbytes); } /* Read bits from file f into bits[0] through bits[len-1], in "packed" format. */ int ilbc_read_bits(unsigned char *data, unsigned char *bits, int nbytes) { memcpy(bits, data, nbytes); return (nbytes); } static MSILBCEncoderClass *ms_ilbc_encoder_class=NULL; MSFilter * ms_ilbc_encoder_new(void) { MSILBCEncoder *r; r=g_new(MSILBCEncoder,1); ms_ilbc_encoder_init(r); if (ms_ilbc_encoder_class==NULL) { ms_ilbc_encoder_class=g_new(MSILBCEncoderClass,1); ms_ilbc_encoder_class_init(ms_ilbc_encoder_class); } MS_FILTER(r)->klass=MS_FILTER_CLASS(ms_ilbc_encoder_class); return(MS_FILTER(r)); } int ms_ilbc_encoder_set_property(MSILBCEncoder *obj, MSFilterProperty prop, char *value) { switch(prop){ case MS_FILTER_PROPERTY_FMTP: if (value == NULL) return 0; if (strstr(value,"ptime=20")!=NULL) obj->ms_per_frame=20; else if (strstr(value,"ptime=30")!=NULL) obj->ms_per_frame=30; else g_warning("Unrecognized fmtp parameter for ilbc encoder!"); break; } return 0; } int ms_ilbc_encoder_get_property(MSILBCEncoder *obj, MSFilterProperty prop, char *value) { switch(prop){ case MS_FILTER_PROPERTY_FMTP: if (obj->ms_per_frame==20) strncpy(value,"ptime=20",MS_FILTER_PROPERTY_STRING_MAX_SIZE); if (obj->ms_per_frame==30) strncpy(value,"ptime=30",MS_FILTER_PROPERTY_STRING_MAX_SIZE); break; } return 0; } void ms_ilbc_encoder_setup(MSILBCEncoder *r) { MSFilterClass *klass = NULL; switch (r->ms_per_frame) { case 20: r->samples_per_frame = BLOCKL_20MS; r->bytes_per_compressed_frame = NO_OF_BYTES_20MS; break; case 30: r->samples_per_frame = BLOCKL_30MS; r->bytes_per_compressed_frame = NO_OF_BYTES_30MS; break; default: g_error("Bad bitrate value (%i) for ilbc encoder!", r->ms_per_frame); break; } MS_FILTER(r)->r_mingran= (r->samples_per_frame * 2); g_message("Using ilbc encoder with %i ms frames mode.",r->ms_per_frame); initEncode(&r->ilbc_enc, r->ms_per_frame /* ms frames */); } /* FOR INTERNAL USE*/ void ms_ilbc_encoder_init(MSILBCEncoder *r) { /* default bitrate */ r->bitrate = 15200; r->ms_per_frame = 20; r->samples_per_frame = BLOCKL_20MS; r->bytes_per_compressed_frame = NO_OF_BYTES_20MS; ms_filter_init(MS_FILTER(r)); MS_FILTER(r)->infifos=r->f_inputs; MS_FILTER(r)->outqueues=r->q_outputs; MS_FILTER(r)->r_mingran= (r->samples_per_frame * 2); memset(r->f_inputs,0,sizeof(MSFifo*)*MSILBCENCODER_MAX_INPUTS); memset(r->q_outputs,0,sizeof(MSFifo*)*MSILBCENCODER_MAX_INPUTS); } void ms_ilbc_encoder_class_init(MSILBCEncoderClass *klass) { ms_filter_class_init(MS_FILTER_CLASS(klass)); ms_filter_class_set_name(MS_FILTER_CLASS(klass),"ILBCEnc"); MS_FILTER_CLASS(klass)->max_finputs=MSILBCENCODER_MAX_INPUTS; MS_FILTER_CLASS(klass)->max_qoutputs=MSILBCENCODER_MAX_INPUTS; MS_FILTER_CLASS(klass)->r_maxgran=ILBC_MAX_SAMPLES_PER_FRAME*2; MS_FILTER_CLASS(klass)->set_property=(MSFilterPropertyFunc)ms_ilbc_encoder_set_property; MS_FILTER_CLASS(klass)->get_property=(MSFilterPropertyFunc)ms_ilbc_encoder_get_property; MS_FILTER_CLASS(klass)->setup=(MSFilterSetupFunc)ms_ilbc_encoder_setup; MS_FILTER_CLASS(klass)->destroy=(MSFilterDestroyFunc)ms_ilbc_encoder_destroy; MS_FILTER_CLASS(klass)->process=(MSFilterProcessFunc)ms_ilbc_encoder_process; MS_FILTER_CLASS(klass)->info=(MSFilterInfo*)&ilbc_info; } void ms_ilbc_encoder_process(MSILBCEncoder *r) { MSFifo *fi; MSQueue *qo; MSMessage *m; void *src=NULL; float speech[ILBC_MAX_SAMPLES_PER_FRAME]; /* process output fifos, but there is only one for this class of filter*/ qo=r->q_outputs[0]; fi=r->f_inputs[0]; ms_fifo_get_read_ptr(fi,r->samples_per_frame*2,&src); if (src==NULL) { g_warning( "src=%p\n", src); return; } m=ms_message_new(r->bytes_per_compressed_frame); ilbc_read_16bit_samples((gint16*)src, speech, r->samples_per_frame); iLBC_encode((unsigned char *)m->data, speech, &r->ilbc_enc); ms_queue_put(qo,m); } void ms_ilbc_encoder_uninit(MSILBCEncoder *obj) { } void ms_ilbc_encoder_destroy( MSILBCEncoder *obj) { ms_ilbc_encoder_uninit(obj); g_free(obj); } #endif