| /* |
| ** Copyright (C) 2002-2011 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 "config.h" |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <math.h> |
| #include <assert.h> |
| |
| #include <samplerate.h> |
| |
| #include "util.h" |
| #define BUFFER_LEN 50000 |
| #define BLOCK_LEN (12) |
| |
| #define MAX_CHANNELS 10 |
| |
| static void simple_test (int converter, int channel_count, double target_snr) ; |
| static void process_test (int converter, int channel_count, double target_snr) ; |
| static void callback_test (int converter, int channel_count, double target_snr) ; |
| |
| int |
| main (void) |
| { double target ; |
| int k ; |
| |
| puts ("\n Zero Order Hold interpolator :") ; |
| target = 38.0 ; |
| for (k = 1 ; k <= 3 ; k++) |
| { simple_test (SRC_ZERO_ORDER_HOLD, k, target) ; |
| process_test (SRC_ZERO_ORDER_HOLD, k, target) ; |
| callback_test (SRC_ZERO_ORDER_HOLD, k, target) ; |
| } ; |
| |
| puts ("\n Linear interpolator :") ; |
| target = 79.0 ; |
| for (k = 1 ; k <= 3 ; k++) |
| { simple_test (SRC_LINEAR, k, target) ; |
| process_test (SRC_LINEAR, k, target) ; |
| callback_test (SRC_LINEAR, k, target) ; |
| } ; |
| |
| puts ("\n Sinc interpolator :") ; |
| target = 100.0 ; |
| for (k = 1 ; k <= MAX_CHANNELS ; k++) |
| { simple_test (SRC_SINC_FASTEST, k, target) ; |
| process_test (SRC_SINC_FASTEST, k, target) ; |
| callback_test (SRC_SINC_FASTEST, k, target) ; |
| } ; |
| |
| puts ("") ; |
| |
| return 0 ; |
| } /* main */ |
| |
| /*============================================================================== |
| */ |
| |
| static float input_serial [BUFFER_LEN * MAX_CHANNELS] ; |
| static float input_interleaved [BUFFER_LEN * MAX_CHANNELS] ; |
| static float output_interleaved [BUFFER_LEN * MAX_CHANNELS] ; |
| static float output_serial [BUFFER_LEN * MAX_CHANNELS] ; |
| |
| static void |
| simple_test (int converter, int channel_count, double target_snr) |
| { SRC_DATA src_data ; |
| |
| double freq, snr ; |
| int ch, error, frames ; |
| |
| printf ("\t%-22s (%2d channel%c) ............ ", "simple_test", channel_count, channel_count > 1 ? 's' : ' ') ; |
| fflush (stdout) ; |
| |
| assert (channel_count <= MAX_CHANNELS) ; |
| |
| memset (input_serial, 0, sizeof (input_serial)) ; |
| memset (input_interleaved, 0, sizeof (input_interleaved)) ; |
| memset (output_interleaved, 0, sizeof (output_interleaved)) ; |
| memset (output_serial, 0, sizeof (output_serial)) ; |
| |
| frames = BUFFER_LEN ; |
| |
| /* Calculate channel_count separate windowed sine waves. */ |
| for (ch = 0 ; ch < channel_count ; ch++) |
| { freq = (200.0 + 33.333333333 * ch) / 44100.0 ; |
| gen_windowed_sines (1, &freq, 1.0, input_serial + ch * frames, frames) ; |
| } ; |
| |
| /* Interleave the data in preparation for SRC. */ |
| interleave_data (input_serial, input_interleaved, frames, channel_count) ; |
| |
| /* Choose a converstion ratio <= 1.0. */ |
| src_data.src_ratio = 0.95 ; |
| |
| src_data.data_in = input_interleaved ; |
| src_data.input_frames = frames ; |
| |
| src_data.data_out = output_interleaved ; |
| src_data.output_frames = frames ; |
| |
| if ((error = src_simple (&src_data, converter, channel_count))) |
| { printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ; |
| exit (1) ; |
| } ; |
| |
| if (fabs (src_data.output_frames_gen - src_data.src_ratio * src_data.input_frames) > 2) |
| { printf ("\n\nLine %d : bad output data length %ld should be %d.\n", __LINE__, |
| src_data.output_frames_gen, (int) floor (src_data.src_ratio * src_data.input_frames)) ; |
| printf ("\tsrc_ratio : %.4f\n", src_data.src_ratio) ; |
| printf ("\tinput_len : %ld\n", src_data.input_frames) ; |
| printf ("\toutput_len : %ld\n\n", src_data.output_frames_gen) ; |
| exit (1) ; |
| } ; |
| |
| /* De-interleave data so SNR can be calculated for each channel. */ |
| deinterleave_data (output_interleaved, output_serial, frames, channel_count) ; |
| |
| for (ch = 0 ; ch < channel_count ; ch++) |
| { snr = calculate_snr (output_serial + ch * frames, frames, 1) ; |
| if (snr < target_snr) |
| { printf ("\n\nLine %d: channel %d snr %f should be %f\n", __LINE__, ch, snr, target_snr) ; |
| save_oct_float ("output.dat", input_serial, channel_count * frames, output_serial, channel_count * frames) ; |
| exit (1) ; |
| } ; |
| } ; |
| |
| puts ("ok") ; |
| |
| return ; |
| } /* simple_test */ |
| |
| /*============================================================================== |
| */ |
| |
| static void |
| process_test (int converter, int channel_count, double target_snr) |
| { SRC_STATE *src_state ; |
| SRC_DATA src_data ; |
| |
| double freq, snr ; |
| int ch, error, frames, current_in, current_out ; |
| |
| printf ("\t%-22s (%2d channel%c) ............ ", "process_test", channel_count, channel_count > 1 ? 's' : ' ') ; |
| fflush (stdout) ; |
| |
| assert (channel_count <= MAX_CHANNELS) ; |
| |
| memset (input_serial, 0, sizeof (input_serial)) ; |
| memset (input_interleaved, 0, sizeof (input_interleaved)) ; |
| memset (output_interleaved, 0, sizeof (output_interleaved)) ; |
| memset (output_serial, 0, sizeof (output_serial)) ; |
| |
| frames = BUFFER_LEN ; |
| |
| /* Calculate channel_count separate windowed sine waves. */ |
| for (ch = 0 ; ch < channel_count ; ch++) |
| { freq = (400.0 + 11.333333333 * ch) / 44100.0 ; |
| gen_windowed_sines (1, &freq, 1.0, input_serial + ch * frames, frames) ; |
| } ; |
| |
| /* Interleave the data in preparation for SRC. */ |
| interleave_data (input_serial, input_interleaved, frames, channel_count) ; |
| |
| /* Perform sample rate conversion. */ |
| if ((src_state = src_new (converter, channel_count, &error)) == NULL) |
| { printf ("\n\nLine %d : src_new() failed : %s\n\n", __LINE__, src_strerror (error)) ; |
| exit (1) ; |
| } ; |
| |
| src_data.end_of_input = 0 ; /* Set this later. */ |
| |
| /* Choose a converstion ratio < 1.0. */ |
| src_data.src_ratio = 0.95 ; |
| |
| src_data.data_in = input_interleaved ; |
| src_data.data_out = output_interleaved ; |
| |
| current_in = current_out = 0 ; |
| |
| while (1) |
| { src_data.input_frames = MAX (MIN (BLOCK_LEN, frames - current_in), 0) ; |
| src_data.output_frames = MAX (MIN (BLOCK_LEN, frames - current_out), 0) ; |
| |
| if ((error = src_process (src_state, &src_data))) |
| { printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ; |
| exit (1) ; |
| } ; |
| |
| if (src_data.end_of_input && src_data.output_frames_gen == 0) |
| break ; |
| |
| current_in += src_data.input_frames_used ; |
| current_out += src_data.output_frames_gen ; |
| |
| src_data.data_in += src_data.input_frames_used * channel_count ; |
| src_data.data_out += src_data.output_frames_gen * channel_count ; |
| |
| src_data.end_of_input = (current_in >= frames) ? 1 : 0 ; |
| } ; |
| |
| src_state = src_delete (src_state) ; |
| |
| if (fabs (current_out - src_data.src_ratio * current_in) > 2) |
| { printf ("\n\nLine %d : bad output data length %d should be %d.\n", __LINE__, |
| current_out, (int) floor (src_data.src_ratio * current_in)) ; |
| printf ("\tsrc_ratio : %.4f\n", src_data.src_ratio) ; |
| printf ("\tinput_len : %d\n", frames) ; |
| printf ("\toutput_len : %d\n\n", current_out) ; |
| exit (1) ; |
| } ; |
| |
| /* De-interleave data so SNR can be calculated for each channel. */ |
| deinterleave_data (output_interleaved, output_serial, frames, channel_count) ; |
| |
| for (ch = 0 ; ch < channel_count ; ch++) |
| { snr = calculate_snr (output_serial + ch * frames, frames, 1) ; |
| if (snr < target_snr) |
| { printf ("\n\nLine %d: channel %d snr %f should be %f\n", __LINE__, ch, snr, target_snr) ; |
| save_oct_float ("output.dat", input_serial, channel_count * frames, output_serial, channel_count * frames) ; |
| exit (1) ; |
| } ; |
| } ; |
| |
| puts ("ok") ; |
| |
| return ; |
| } /* process_test */ |
| |
| /*============================================================================== |
| */ |
| |
| typedef struct |
| { int channels ; |
| long total_frames ; |
| long current_frame ; |
| float *data ; |
| } 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 ; |
| |
| *data = pcb_data->data + (pcb_data->current_frame * pcb_data->channels) ; |
| |
| if (pcb_data->total_frames - pcb_data->current_frame < BLOCK_LEN) |
| frames = pcb_data->total_frames - pcb_data->current_frame ; |
| else |
| frames = BLOCK_LEN ; |
| |
| pcb_data->current_frame += frames ; |
| |
| return frames ; |
| } /* test_callback_func */ |
| |
| static void |
| callback_test (int converter, int channel_count, double target_snr) |
| { TEST_CB_DATA test_callback_data ; |
| SRC_STATE *src_state = NULL ; |
| |
| double freq, snr, src_ratio ; |
| int ch, error, frames, read_total, read_count ; |
| |
| printf ("\t%-22s (%2d channel%c) ............ ", "callback_test", channel_count, channel_count > 1 ? 's' : ' ') ; |
| fflush (stdout) ; |
| |
| assert (channel_count <= MAX_CHANNELS) ; |
| |
| memset (input_serial, 0, sizeof (input_serial)) ; |
| memset (input_interleaved, 0, sizeof (input_interleaved)) ; |
| memset (output_interleaved, 0, sizeof (output_interleaved)) ; |
| memset (output_serial, 0, sizeof (output_serial)) ; |
| memset (&test_callback_data, 0, sizeof (test_callback_data)) ; |
| |
| frames = BUFFER_LEN ; |
| |
| /* Calculate channel_count separate windowed sine waves. */ |
| for (ch = 0 ; ch < channel_count ; ch++) |
| { freq = (200.0 + 33.333333333 * ch) / 44100.0 ; |
| gen_windowed_sines (1, &freq, 1.0, input_serial + ch * frames, frames) ; |
| } ; |
| |
| /* Interleave the data in preparation for SRC. */ |
| interleave_data (input_serial, input_interleaved, frames, channel_count) ; |
| |
| /* Perform sample rate conversion. */ |
| src_ratio = 0.95 ; |
| test_callback_data.channels = channel_count ; |
| test_callback_data.total_frames = frames ; |
| test_callback_data.current_frame = 0 ; |
| test_callback_data.data = input_interleaved ; |
| |
| if ((src_state = src_callback_new (test_callback_func, converter, channel_count, &error, &test_callback_data)) == NULL) |
| { printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ; |
| exit (1) ; |
| } ; |
| |
| read_total = 0 ; |
| while (read_total < frames) |
| { read_count = src_callback_read (src_state, src_ratio, frames - read_total, output_interleaved + read_total * channel_count) ; |
| |
| if (read_count <= 0) |
| break ; |
| |
| read_total += read_count ; |
| } ; |
| |
| 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 * frames) > 2) |
| { printf ("\n\nLine %d : bad output data length %d should be %d.\n", __LINE__, |
| read_total, (int) floor (src_ratio * frames)) ; |
| printf ("\tsrc_ratio : %.4f\n", src_ratio) ; |
| printf ("\tinput_len : %d\n", frames) ; |
| printf ("\toutput_len : %d\n\n", read_total) ; |
| exit (1) ; |
| } ; |
| |
| /* De-interleave data so SNR can be calculated for each channel. */ |
| deinterleave_data (output_interleaved, output_serial, frames, channel_count) ; |
| |
| for (ch = 0 ; ch < channel_count ; ch++) |
| { snr = calculate_snr (output_serial + ch * frames, frames, 1) ; |
| if (snr < target_snr) |
| { printf ("\n\nLine %d: channel %d snr %f should be %f\n", __LINE__, ch, snr, target_snr) ; |
| save_oct_float ("output.dat", input_serial, channel_count * frames, output_serial, channel_count * frames) ; |
| exit (1) ; |
| } ; |
| } ; |
| |
| puts ("ok") ; |
| |
| return ; |
| } /* callback_test */ |
| |