int main()
{
int context;
int i,j,k=OF_CODEC_LDPC_STAIRCASE_STABLE;
of_session_t *ses;
of_status_t ret;
// LDPC parameters
of_ldpc_parameters_t params;
params.nb_source_symbols = 1000;
params.nb_repair_symbols = 500;
params.encoding_symbol_length = 1024;
params.prng_seed = rand();
params.N1 = 5;
char **orig_symb_tab;
void **encoding_symb_tab;
//for (k=0;k<CODEC_MAX;k++)
{
// create an instance of an encoder
if ((ret = of_create_codec_instance(&ses,k,OF_ENCODER,1)) != OF_STATUS_OK)
{
printf("error in of_create_codec_instance\n");
goto error;
}
if (of_set_fec_parameters(ses, (of_parameters_t*)¶ms) != OF_STATUS_OK) {
printf("error in of_set_fec_parameters\n");
goto error;
}
if( of_set_callback_functions(ses,source_cb,repair_cb,&context) != OF_STATUS_OK) {
printf ("error in of_set_fec_parameters\n");
}
orig_symb_tab = (char**)calloc(params.nb_source_symbols,sizeof(char*));
encoding_symb_tab = (void*)calloc(params.nb_source_symbols+params.nb_repair_symbols,sizeof(void*));
for(i=0;i<params.nb_source_symbols;i++)
{
orig_symb_tab[i] = (char*)calloc(1,params.encoding_symbol_length);
encoding_symb_tab[i] = (void*)orig_symb_tab[i];
for (j=0;j<params.encoding_symbol_length;j++)
{
orig_symb_tab[i][j] = rand();
}
}
for(i=params.nb_source_symbols;i<params.nb_source_symbols+params.nb_repair_symbols;i++)
{
encoding_symb_tab[i] = (void*)calloc(1,params.encoding_symbol_length);
if (of_build_repair_symbol(ses,encoding_symb_tab,i) != OF_STATUS_OK)
{
printf("of_build_repair_symbol: ");;
//goto error;
}
}
if ((ret = of_release_codec_instance(ses)) != OF_STATUS_OK)
{
printf("of_release_codec_instance: ");;
//goto error;
}
//create a decoder instance
if ((ret = of_create_codec_instance(&ses,k,OF_DECODER,1)) != OF_STATUS_OK)
{
printf("of_create_codec_instance: ");
;
//goto error;
}
if (of_set_fec_parameters(ses, (of_parameters_t*)¶ms) != OF_STATUS_OK) {
printf(("of_set_fec_parameters(): "));;
// goto error;
}
if( of_set_callback_functions(ses,source_cb,repair_cb,&context) != OF_STATUS_OK) {
printf (("of_set_fec_parameters(): "));;
}
for (i=380;i<1400;i++) //take 1020 symbols
{
of_decode_with_new_symbol(ses,encoding_symb_tab[i],i);
}
of_finish_decoding(ses);
printf("fini\n");
if ((ret = of_release_codec_instance(ses)) != OF_STATUS_OK)
{
printf("of_release_codec_instance: ");;
//goto error;
}
free(encoding_symb_tab);
free(orig_symb_tab);
}
printf ("nb : %i,%i\n",nb_source,nb_repair);
printf("OK\n");
return 0;
error:
printf("error\n");
return -1;
}
static void fec_dec_recover_packets(fec_dec *dec)
{
of_session_t *session;
of_rs_parameters_t params;
void **encoding_symbol_tab;
guint i;
GList *link;
assert(dec->has_snbase);
assert(dec->max_packet_size > 0);
encoding_symbol_tab = malloc(sizeof(void*) * (dec->num_media_packets + dec->num_fec_packets));
memset(encoding_symbol_tab, 0, sizeof(void*) * (dec->num_media_packets + dec->num_fec_packets));
for (link = g_queue_peek_head_link(dec->media_packets); link != NULL; link = link->next)
{
GstBuffer *media_packet;
guint32 seqnum;
media_packet = link->data;
seqnum = fec_dec_correct_seqnum(dec, gst_rtp_buffer_get_seq(media_packet));
encoding_symbol_tab[seqnum - dec->cur_snbase] = GST_BUFFER_DATA(media_packet);
}
for (link = g_queue_peek_head_link(dec->fec_packets); link != NULL; link = link->next)
{
GstBuffer *packet;
guint8 *fec_data;
guint8 esi;
packet = link->data;
fec_data = GST_BUFFER_DATA(packet) + gst_rtp_buffer_get_header_len(packet);
esi = fec_data[12];
encoding_symbol_tab[esi + dec->num_media_packets] = fec_data + RTP_FEC_HEADER_SIZE + 1;
}
params.nb_source_symbols = dec->num_media_packets;
params.nb_repair_symbols = dec->num_fec_packets;
params.encoding_symbol_length = dec->max_packet_size;
of_create_codec_instance(&session, OF_CODEC_REED_SOLOMON_GF_2_8_STABLE, OF_DECODER, 0);
of_set_fec_parameters(session, (of_parameters_t*)(¶ms));
of_set_callback_functions(session, fec_dec_source_packet_cb, NULL, dec);
#if 1
for (i = 0; i < dec->num_media_packets + dec->num_fec_packets; ++i)
{
if (encoding_symbol_tab[i] != 0)
of_decode_with_new_symbol(session, encoding_symbol_tab[i], i);
}
#else
of_set_available_symbols(session, encoding_symbol_tab);
#endif
if (!of_is_decoding_complete(session))
{
of_finish_decoding(session);
}
free(encoding_symbol_tab);
of_release_codec_instance(session);
}