void pcm_flush_task(uint_32 para)
{
while(1)
{
_lwevent_wait_ticks(&player_event, PLAYER_EVENT_MSK_SONG_RESUME, FALSE, 0);
if (_lwsem_wait(&pcm_decoded_sem) != MQX_OK)
{
LOCALPLAY_LOG("\n pcm_flush : Error - Unable to wait pcm_decoded_sem.");
}
else{
if(gPcmFlushTaskFinish == 1){
break;
}
}
#if 0
if (g_device_ptr == NULL) {
LOCALPLAY_LOG(
"The audio device pointer is NULL. audio_fulsh_task exits. \n");
break;
}
#endif
if(g_audio_buf_ptr != NULL)
put_file_data(g_audio_buf_ptr, g_buf_bytes_to_flush, NULL);
if (_lwsem_post(&pcm_flush_sem) != MQX_OK)
{
//LOCALPLAY_LOG("\n pcm_flush : Error - Unable to post pcmFlush_sem.");
}
}
//LOCALPLAY_LOG("__guoyifang__: pcm_flush_task destroyed.\n");
printf("pcm_flush_task exit.\n");
gPcmFlushTaskFinish = 0;
//_task_block(); //wait for being destroyed
}
int kernel_run_bch_ber_ch_mode
(
int galois_field_degree,
int bch_code_length,
int error_correction,
int decoded_seq_buf_size_frames,
double ber,
char* out_file_postfix,
char* input_file_name,
int gui_progress
)
{
FILE* flog = stdout;
log(flog, "Current mode: use of BCH codec only via BER parametrized channel\n");
log(flog, "Simulation kernel settings:\n");
log(flog, "Galois field degree: %d\n", galois_field_degree);
log(flog, "BCH code length: %d\n", bch_code_length);
log(flog, "Error correction property: %d\n", error_correction);
log(flog, "BER (Bit Error Rate): %.2f\n", ber);
log(flog, "Output file postfix: %s\n", out_file_postfix);
log(flog, "Input file name: %s\n", input_file_name);
/************************************************************************/
/* Параметры тестового окружения. */
/************************************************************************/
char* file_path = input_file_name;
int* data_in = get_file_data(file_path);
int data_size = get_file_size(file_path) * CHAR_BIT;
//print_data(data_in, data_size);
int* data_out = NULL;
/************************************************************************/
/* Параметры БЧХ-кодера */
/************************************************************************/
//int galois_field_degree = 4;
//int bch_code_length = 15;
//int error_correction = 3;
/************************************************************************/
/* Параметры ДСК-канала */
/************************************************************************/
//double ber = 0;//2*1e-5;
int random_errors_quantity = 5;
int erase_errors_quantity = 2;
/************************************************************************/
/* Создание программных компонентов. */
/************************************************************************/
bch_encoder_t bch_encoder = bch_encoder_create(flog, galois_field_degree, bch_code_length, error_correction);
bch_decoder_t bch_decoder = bch_decoder_create(ERRORS_CORRECTION_MODE, flog, galois_field_degree, bch_code_length, error_correction);
/* Получение длины фрейма данных, который может кодировать БЧХ-кодер. */
int bch_frame_size = bch_encoder_get_frame_size(bch_encoder);
int bch_codeword_size = bch_encoder_get_codeword_size(bch_encoder);
/************************************************************************/
/* Создание программных компонентов. */
/************************************************************************/
transmitter_t transmitter = transmitter_create(flog, bch_frame_size, data_in, data_size);
receiver_t receiver = receiver_create(flog, bch_frame_size, data_size);
/************************************************************************/
/* Создание программных компонентов. */
/************************************************************************/
channel_bs_t channel_bs = channel_bs_create(flog, ber);
/************************************************************************/
/* Параметры промежуточных буферов */
/************************************************************************/
int bch_frame_fifo_size = decoded_seq_buf_size_frames + 1;
int bch_codeword_fifo_size = decoded_seq_buf_size_frames + 1;
/************************************************************************/
/* Создание промежуточных буферов. */
/************************************************************************/
frame_fifo_t bch_frame_fifo = frame_fifo_create(bch_frame_fifo_size, bch_frame_size);
codeword_fifo_t bch_codeword_fifo = codeword_fifo_create(bch_codeword_fifo_size, bch_codeword_size);
/************************************************************************/
/* Запуск программных компонентов. */
/************************************************************************/
log(flog, "Simulation started\n");
transmitter->start(transmitter);
receiver->start(receiver);
bch_encoder->start(bch_encoder);
bch_decoder->start(bch_decoder);
channel_bs->start(channel_bs);
/************************************************************************/
/* Запуск цикла моделирования. */
/************************************************************************/
int sent_frames = 0;
int frames_to_sent = data_size/bch_frame_size;
int send_bits_all = data_size+decoded_seq_buf_size_frames*bch_frame_size;
L_Loop:
/*if (!(sent_bits_cnt % percent_precision) && !gui_progress)
printf("\rProgress: %.0f%%", ((float)sent_bits_cnt/
(float)send_bits_all) * 100);
else if (!(sent_bits_cnt % percent_precision))
printf("Progress: %.0f%%\n", ((float)sent_bits_cnt/
(float)send_bits_all) * 100);*/
loadbar(sent_frames++, frames_to_sent, 50);
/* Генерация фрейма данных передатчиком. */
frame_t bch_frame_in = transmitter->transmit_frame(transmitter);
if (bch_frame_in == NULL) goto L_Stop;
frame_display(bch_frame_in);
/* Запись сгенерированного кодового слова БЧХ-кода в промежуточный буфер. */
bch_frame_fifo = frame_fifo_put(bch_frame_fifo, bch_frame_in);
/* Кодирование фрейма данных БЧХ-кодером и получение кодового слова БЧХ-кода. */
codeword_t bch_codeword_in = bch_encoder->encode(bch_encoder, bch_frame_in);
codeword_display(bch_codeword_in);
/* Передача кодового слова сверточного кода по каналу. */
codeword_t bch_codeword_out = channel_bs->transfer(channel_bs, bch_codeword_in);
/* Декодирование кодового слова БЧХ-декодером и получение фрейма данных. */
frame_t bch_frame_out = bch_decoder->decode(bch_decoder, bch_codeword_out, bch_codeword_in);
frame_display(bch_frame_out);
/* Извлечение из промежуточного буфера фрейма данных. */
bch_frame_in = frame_fifo_get(bch_frame_fifo);
/* Прием фрейма данных и анализ его корректности. */
receiver->receive_frame(receiver, bch_frame_out, bch_frame_in);
goto L_Loop;
/************************************************************************/
/* Останов программных компонентов. */
/************************************************************************/
L_Stop:
transmitter->stop(transmitter);
receiver->stop(receiver);
bch_encoder->stop(bch_encoder);
bch_decoder->stop(bch_decoder);
channel_bs->stop(channel_bs);
log(flog, "Simulation stopped\n");
/************************************************************************/
/* Проверка корректности принятых данных. */
/************************************************************************/
data_out = receiver_get_received_data(receiver);
printf("\n");
if (cmp_data(data_in, data_out, data_size))
printf("Comparison test: OK\n");
else
printf("Comparison test: FAIL\n");
free(data_in);
out_file_postfix = extend_out_file_postfix(
out_file_postfix,
galois_field_degree,
bch_code_length,
error_correction,
0,
ber);
put_file_data(data_out, file_path, out_file_postfix);
//print_data(data_in, data_size);
//print_data(data_out, data_size);
/************************************************************************/
/* Уничтожение программных компонентов. */
/************************************************************************/
transmitter_destroy(transmitter);
receiver_destroy(receiver);
bch_encoder_destroy(bch_encoder);
bch_decoder_destroy(bch_decoder);
channel_bs_destroy(channel_bs);
frame_fifo_destroy(bch_frame_fifo);
codeword_fifo_destroy(bch_codeword_fifo);
#ifdef _DEBUG
_CrtDumpMemoryLeaks();
#endif
return 0;
}
int kernel_run_cnv_mode
(
int galois_field_degree,
int bch_code_length,
int error_correction,
int decoded_seq_buf_size_frames,
double ber,
char* out_file_postfix,
char* input_file_name,
int gui_progress)
{
FILE* flog = stdout;
log(flog, "Current mode: use of CNV codec only via BER parametrized channel\n");
log(flog, "Simulation kernel settings:\n");
log(flog, "Galois field degree: %d\n", galois_field_degree);
log(flog, "BCH code length: %d\n", bch_code_length);
log(flog, "Error correction property: %d\n", error_correction);
log(flog, "Size of decoded buffer (CNV decoder): %d\n", decoded_seq_buf_size_frames);
log(flog, "BER (Bit Error Rate): %.2f\n", ber);
log(flog, "Output file postfix: %s\n", out_file_postfix);
log(flog, "Input file name: %s\n", input_file_name);
/************************************************************************/
/* Параметры тестового окружения. */
/************************************************************************/
int* data_in = get_file_data(input_file_name);
int data_size = get_file_size(input_file_name) * CHAR_BIT;
//print_data(data_in, data_size);
int* data_out = NULL;
int use_bch_codec = 0;
/************************************************************************/
/* Параметры ДСК-канала */
/************************************************************************/
//double ber = 0;//2*1e-5;
/************************************************************************/
/* Технологические переменные. */
/************************************************************************/
int skip_q_cnt = 0;
int percent_precision = gui_progress ? (int)1e3 : 5;
int sent_bits_cnt = 0;
/************************************************************************/
/* Создание программных компонентов. */
/************************************************************************/
int frame_size = 10;
transmitter_t transmitter = transmitter_create(flog, frame_size, data_in, data_size);
receiver_t receiver = receiver_create(flog, frame_size, data_size);
/************************************************************************/
/* Параметры сверточного кодера. */
/************************************************************************/
int regs_q = 2; /* ! do not change */
int codeword_length = frame_size * regs_q;
//int decoded_seq_buf_size_frames = 2;
int decoded_seq_buf_size = frame_size * decoded_seq_buf_size_frames + 1;
int skip_q = decoded_seq_buf_size_frames;
/************************************************************************/
/* Создание программных компонентов. */
/************************************************************************/
cnv_encoder_t cnv_encoder = cnv_encoder_create(flog, regs_q, codeword_length);
cnv_decoder_t cnv_decoder = cnv_decoder_create(flog, regs_q, decoded_seq_buf_size);
/************************************************************************/
/* Создание программных компонентов. */
/************************************************************************/
channel_bs_t channel_bs = channel_bs_create(flog, ber);
/************************************************************************/
/* Параметры промежуточных буферов */
/************************************************************************/
int frame_fifo_size = decoded_seq_buf_size_frames + 1;
/************************************************************************/
/* Создание промежуточных буферов. */
/************************************************************************/
frame_fifo_t frame_fifo = frame_fifo_create(frame_fifo_size, frame_size);
/************************************************************************/
/* Запуск программных компонентов. */
/************************************************************************/
log(flog, "Simulation started\n");
transmitter->start(transmitter);
receiver->start(receiver);
cnv_encoder->start(cnv_encoder);
cnv_decoder->start(cnv_decoder);
channel_bs->start(channel_bs);
/************************************************************************/
/* Запуск цикла моделирования. */
/************************************************************************/
int sent_frames = 0;
int frames_to_sent = data_size/frame_size;
int send_bits_all = data_size+decoded_seq_buf_size_frames*frame_size;
L_Loop:
/*if (!(sent_bits_cnt % percent_precision) && !gui_progress)
printf("\rProgress: %.0f%%", ((float)sent_bits_cnt/
(float)send_bits_all) * 100);
else if (!(sent_bits_cnt % percent_precision))
printf("Progress: %.0f%%\n", ((float)sent_bits_cnt/
(float)send_bits_all) * 100);*/
loadbar(sent_frames++, frames_to_sent, 50);
sent_bits_cnt += frame_size;
/* Генерация фрейма данных передатчиком. */
frame_t frame_in = transmitter->transmit_frame(transmitter);
if (frame_in == NULL) goto L_Dummy_Generation;
frame_display(frame_in);
/* Запись сгенерированного фрейма данных в промежуточный буфер. */
frame_fifo = frame_fifo_put(frame_fifo, frame_in);
/* Кодирование фрейма данных сверточным кодером и получение кодового слова сверточного кода.*/
codeword_t cnv_codeword_in = cnv_encoder->encode(cnv_encoder, frame_in);
goto L_Skip_Dummy_Generation;
L_Dummy_Generation:
cnv_codeword_in = codeword_create(cnv_encoder->codeword_length);
L_Skip_Dummy_Generation:
codeword_display(cnv_codeword_in);
/* Передача кодового слова сверточного кода по каналу. */
codeword_t cnv_codeword_out = channel_bs->transfer(channel_bs, cnv_codeword_in);
codeword_display(cnv_codeword_out);
/* Декодирование кодового слова сверточного кода и получение фрейма данных. */
frame_t frame_out = cnv_decoder->decode(cnv_decoder, cnv_codeword_out, cnv_codeword_in);
frame_display(frame_out);
/* Проверка счетчика пропусков. */
if(skip_q_cnt != skip_q) {
skip_q_cnt++;
goto L_Loop;
}
/* Извлечение из промежуточного буфера фрейма данных. */
frame_in = frame_fifo_get(frame_fifo);
frame_display(frame_in);
/* Прием фрейма данных и анализ его корректности. */
receiver->receive_frame(receiver, frame_out, frame_in);
/* Проверка наличия фреймов в буфере. */
if(frame_fifo_is_empty(frame_fifo))
goto L_Stop;
else
goto L_Loop;
/************************************************************************/
/* Останов программных компонентов. */
/************************************************************************/
L_Stop:
transmitter->stop(transmitter);
receiver->stop(receiver);
cnv_encoder->stop(cnv_encoder);
cnv_decoder->stop(cnv_decoder);
channel_bs->stop(channel_bs);
log(flog, "Simulation stopped\n");
/************************************************************************/
/* Проверка корректности принятых данных. */
/************************************************************************/
data_out = receiver_get_received_data(receiver);
printf("\n");
if (cmp_data(data_in, data_out, data_size))
printf("Comparison test: OK\n");
else
printf("Comparison test: FAIL\n");
free(data_in);
out_file_postfix = extend_out_file_postfix(
out_file_postfix,
galois_field_degree,
bch_code_length,
error_correction,
decoded_seq_buf_size,
ber);
put_file_data(data_out, input_file_name, out_file_postfix);
//print_data(data_in, data_size);
//print_data(data_out, data_size);
/************************************************************************/
/* Уничтожение программных компонентов. */
/************************************************************************/
transmitter_destroy(transmitter);
receiver_destroy(receiver);
cnv_encoder_destroy(cnv_encoder);
cnv_decoder_destroy(cnv_decoder);
channel_bs_destroy(channel_bs);
frame_fifo_destroy(frame_fifo);
#ifdef _DEBUG
_CrtDumpMemoryLeaks();
#endif
return 0;
}