| /* |
| ** Copyright (C) 2003-2011 Erik de Castro Lopo <erikd@mega-nerd.com> |
| ** |
| ** This program is free software; you can redistribute it and/or modify |
| ** it under the terms of the GNU General Public License as published by |
| ** the Free Software Foundation; either version 2 of the License, or |
| ** (at your option) any later version. |
| ** |
| ** This program 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 General Public License for more details. |
| ** |
| ** You should have received a copy of the GNU General Public License |
| ** along with this program; if not, write to the Free Software |
| ** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <math.h> |
| |
| #include <samplerate.h> |
| |
| #include "util.h" |
| |
| #define BUFFER_LEN 10000 |
| #define CB_READ_LEN 256 |
| |
| static void callback_test (int converter, double ratio) ; |
| static void end_of_stream_test (int converter) ; |
| |
| int |
| main (void) |
| { static double src_ratios [] = |
| { 1.0, 0.099, 0.1, 0.33333333, 0.789, 1.0001, 1.9, 3.1, 9.9 |
| } ; |
| |
| int k ; |
| |
| puts ("") ; |
| |
| puts (" Zero Order Hold interpolator :") ; |
| for (k = 0 ; k < ARRAY_LEN (src_ratios) ; k++) |
| callback_test (SRC_ZERO_ORDER_HOLD, src_ratios [k]) ; |
| |
| puts (" Linear interpolator :") ; |
| for (k = 0 ; k < ARRAY_LEN (src_ratios) ; k++) |
| callback_test (SRC_LINEAR, src_ratios [k]) ; |
| |
| puts (" Sinc interpolator :") ; |
| for (k = 0 ; k < ARRAY_LEN (src_ratios) ; k++) |
| callback_test (SRC_SINC_FASTEST, src_ratios [k]) ; |
| |
| puts ("") ; |
| |
| puts (" End of stream test :") ; |
| end_of_stream_test (SRC_ZERO_ORDER_HOLD) ; |
| end_of_stream_test (SRC_LINEAR) ; |
| end_of_stream_test (SRC_SINC_FASTEST) ; |
| |
| puts ("") ; |
| return 0 ; |
| } /* main */ |
| |
| /*===================================================================================== |
| */ |
| |
| typedef struct |
| { int channels ; |
| long count, total ; |
| int end_of_data ; |
| float data [BUFFER_LEN] ; |
| } TEST_CB_DATA ; |
| |
| static long |
| test_callback_func (void *cb_data, float **data) |
| { TEST_CB_DATA *pcb_data ; |
| |
| long frames ; |
| |
| if ((pcb_data = cb_data) == NULL) |
| return 0 ; |
| |
| if (data == NULL) |
| return 0 ; |
| |
| if (pcb_data->total - pcb_data->count > CB_READ_LEN) |
| frames = CB_READ_LEN / pcb_data->channels ; |
| else |
| frames = (pcb_data->total - pcb_data->count) / pcb_data->channels ; |
| |
| *data = pcb_data->data + pcb_data->count ; |
| pcb_data->count += frames ; |
| |
| return frames ; |
| } /* test_callback_func */ |
| |
| |
| static void |
| callback_test (int converter, double src_ratio) |
| { static TEST_CB_DATA test_callback_data ; |
| static float output [BUFFER_LEN] ; |
| |
| SRC_STATE *src_state ; |
| |
| long read_count, read_total ; |
| int error ; |
| |
| printf ("\tcallback_test (SRC ratio = %6.4f) ........... ", src_ratio) ; |
| fflush (stdout) ; |
| |
| test_callback_data.channels = 2 ; |
| test_callback_data.count = 0 ; |
| test_callback_data.end_of_data = 0 ; |
| test_callback_data.total = ARRAY_LEN (test_callback_data.data) ; |
| |
| if ((src_state = src_callback_new (test_callback_func, converter, test_callback_data.channels, &error, &test_callback_data)) == NULL) |
| { printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ; |
| exit (1) ; |
| } ; |
| |
| read_total = 0 ; |
| do |
| { /* We will be throwing away output data, so just grab as much as possible. */ |
| read_count = ARRAY_LEN (output) / test_callback_data.channels ; |
| read_count = src_callback_read (src_state, src_ratio, read_count, output) ; |
| read_total += read_count ; |
| } |
| while (read_count > 0) ; |
| |
| if ((error = src_error (src_state)) != 0) |
| { printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ; |
| exit (1) ; |
| } ; |
| |
| src_state = src_delete (src_state) ; |
| |
| if (fabs (read_total / src_ratio - ARRAY_LEN (test_callback_data.data)) > 2.0) |
| { printf ("\n\nLine %d : input / output length mismatch.\n\n", __LINE__) ; |
| printf (" input len : %d\n", ARRAY_LEN (test_callback_data.data)) ; |
| printf (" output len : %ld (should be %g +/- 2)\n\n", read_total, |
| floor (0.5 + src_ratio * ARRAY_LEN (test_callback_data.data))) ; |
| exit (1) ; |
| } ; |
| |
| puts ("ok") ; |
| |
| return ; |
| } /* callback_test */ |
| |
| /*===================================================================================== |
| */ |
| |
| static long |
| eos_callback_func (void *cb_data, float **data) |
| { |
| TEST_CB_DATA *pcb_data ; |
| long frames ; |
| |
| if (data == NULL) |
| return 0 ; |
| |
| if ((pcb_data = cb_data) == NULL) |
| return 0 ; |
| |
| /* |
| ** Return immediately if there is no more data. |
| ** In this case, the output pointer 'data' will not be set and |
| ** valgrind should not warn about it. |
| */ |
| if (pcb_data->end_of_data) |
| return 0 ; |
| |
| if (pcb_data->total - pcb_data->count > CB_READ_LEN) |
| frames = CB_READ_LEN / pcb_data->channels ; |
| else |
| frames = (pcb_data->total - pcb_data->count) / pcb_data->channels ; |
| |
| *data = pcb_data->data + pcb_data->count ; |
| pcb_data->count += frames ; |
| |
| /* |
| ** Set end_of_data so that the next call to the callback function will |
| ** return zero ocunt without setting the 'data' pointer. |
| */ |
| if (pcb_data->total < 2 * pcb_data->count) |
| pcb_data->end_of_data = 1 ; |
| |
| return frames ; |
| } /* eos_callback_data */ |
| |
| |
| static void |
| end_of_stream_test (int converter) |
| { static TEST_CB_DATA test_callback_data ; |
| static float output [BUFFER_LEN] ; |
| |
| SRC_STATE *src_state ; |
| |
| double src_ratio = 0.3 ; |
| long read_count, read_total ; |
| int error ; |
| |
| printf ("\t%-30s ........... ", src_get_name (converter)) ; |
| fflush (stdout) ; |
| |
| test_callback_data.channels = 2 ; |
| test_callback_data.count = 0 ; |
| test_callback_data.end_of_data = 0 ; |
| test_callback_data.total = ARRAY_LEN (test_callback_data.data) ; |
| |
| if ((src_state = src_callback_new (eos_callback_func, converter, test_callback_data.channels, &error, &test_callback_data)) == NULL) |
| { printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ; |
| exit (1) ; |
| } ; |
| |
| read_total = 0 ; |
| do |
| { /* We will be throwing away output data, so just grab as much as possible. */ |
| read_count = ARRAY_LEN (output) / test_callback_data.channels ; |
| read_count = src_callback_read (src_state, src_ratio, read_count, output) ; |
| read_total += read_count ; |
| } |
| while (read_count > 0) ; |
| |
| if ((error = src_error (src_state)) != 0) |
| { printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ; |
| exit (1) ; |
| } ; |
| |
| src_state = src_delete (src_state) ; |
| |
| if (test_callback_data.end_of_data == 0) |
| { printf ("\n\nLine %d : test_callback_data.end_of_data should not be 0." |
| " This is a bug in the test.\n\n", __LINE__) ; |
| exit (1) ; |
| } ; |
| |
| puts ("ok") ; |
| return ; |
| } /* end_of_stream_test */ |