Emeric Vigier | eebea67 | 2012-08-06 17:36:30 -0400 | [diff] [blame] | 1 | /* |
| 2 | ** Copyright (C) 2002-2011 Erik de Castro Lopo <erikd@mega-nerd.com> |
| 3 | ** |
| 4 | ** This program is free software; you can redistribute it and/or modify |
| 5 | ** it under the terms of the GNU General Public License as published by |
| 6 | ** the Free Software Foundation; either version 2 of the License, or |
| 7 | ** (at your option) any later version. |
| 8 | ** |
| 9 | ** This program is distributed in the hope that it will be useful, |
| 10 | ** but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | ** GNU General Public License for more details. |
| 13 | ** |
| 14 | ** You should have received a copy of the GNU General Public License |
| 15 | ** along with this program; if not, write to the Free Software |
| 16 | ** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. |
| 17 | */ |
| 18 | |
| 19 | #include "config.h" |
| 20 | |
| 21 | #include <stdio.h> |
| 22 | #include <stdlib.h> |
| 23 | #include <string.h> |
| 24 | #include <math.h> |
| 25 | #include <assert.h> |
| 26 | |
| 27 | #include <samplerate.h> |
| 28 | |
| 29 | #include "util.h" |
| 30 | #define BUFFER_LEN 50000 |
| 31 | #define BLOCK_LEN (12) |
| 32 | |
| 33 | #define MAX_CHANNELS 10 |
| 34 | |
| 35 | static void simple_test (int converter, int channel_count, double target_snr) ; |
| 36 | static void process_test (int converter, int channel_count, double target_snr) ; |
| 37 | static void callback_test (int converter, int channel_count, double target_snr) ; |
| 38 | |
| 39 | int |
| 40 | main (void) |
| 41 | { double target ; |
| 42 | int k ; |
| 43 | |
| 44 | puts ("\n Zero Order Hold interpolator :") ; |
| 45 | target = 38.0 ; |
| 46 | for (k = 1 ; k <= 3 ; k++) |
| 47 | { simple_test (SRC_ZERO_ORDER_HOLD, k, target) ; |
| 48 | process_test (SRC_ZERO_ORDER_HOLD, k, target) ; |
| 49 | callback_test (SRC_ZERO_ORDER_HOLD, k, target) ; |
| 50 | } ; |
| 51 | |
| 52 | puts ("\n Linear interpolator :") ; |
| 53 | target = 79.0 ; |
| 54 | for (k = 1 ; k <= 3 ; k++) |
| 55 | { simple_test (SRC_LINEAR, k, target) ; |
| 56 | process_test (SRC_LINEAR, k, target) ; |
| 57 | callback_test (SRC_LINEAR, k, target) ; |
| 58 | } ; |
| 59 | |
| 60 | puts ("\n Sinc interpolator :") ; |
| 61 | target = 100.0 ; |
| 62 | for (k = 1 ; k <= MAX_CHANNELS ; k++) |
| 63 | { simple_test (SRC_SINC_FASTEST, k, target) ; |
| 64 | process_test (SRC_SINC_FASTEST, k, target) ; |
| 65 | callback_test (SRC_SINC_FASTEST, k, target) ; |
| 66 | } ; |
| 67 | |
| 68 | puts ("") ; |
| 69 | |
| 70 | return 0 ; |
| 71 | } /* main */ |
| 72 | |
| 73 | /*============================================================================== |
| 74 | */ |
| 75 | |
| 76 | static float input_serial [BUFFER_LEN * MAX_CHANNELS] ; |
| 77 | static float input_interleaved [BUFFER_LEN * MAX_CHANNELS] ; |
| 78 | static float output_interleaved [BUFFER_LEN * MAX_CHANNELS] ; |
| 79 | static float output_serial [BUFFER_LEN * MAX_CHANNELS] ; |
| 80 | |
| 81 | static void |
| 82 | simple_test (int converter, int channel_count, double target_snr) |
| 83 | { SRC_DATA src_data ; |
| 84 | |
| 85 | double freq, snr ; |
| 86 | int ch, error, frames ; |
| 87 | |
| 88 | printf ("\t%-22s (%2d channel%c) ............ ", "simple_test", channel_count, channel_count > 1 ? 's' : ' ') ; |
| 89 | fflush (stdout) ; |
| 90 | |
| 91 | assert (channel_count <= MAX_CHANNELS) ; |
| 92 | |
| 93 | memset (input_serial, 0, sizeof (input_serial)) ; |
| 94 | memset (input_interleaved, 0, sizeof (input_interleaved)) ; |
| 95 | memset (output_interleaved, 0, sizeof (output_interleaved)) ; |
| 96 | memset (output_serial, 0, sizeof (output_serial)) ; |
| 97 | |
| 98 | frames = BUFFER_LEN ; |
| 99 | |
| 100 | /* Calculate channel_count separate windowed sine waves. */ |
| 101 | for (ch = 0 ; ch < channel_count ; ch++) |
| 102 | { freq = (200.0 + 33.333333333 * ch) / 44100.0 ; |
| 103 | gen_windowed_sines (1, &freq, 1.0, input_serial + ch * frames, frames) ; |
| 104 | } ; |
| 105 | |
| 106 | /* Interleave the data in preparation for SRC. */ |
| 107 | interleave_data (input_serial, input_interleaved, frames, channel_count) ; |
| 108 | |
| 109 | /* Choose a converstion ratio <= 1.0. */ |
| 110 | src_data.src_ratio = 0.95 ; |
| 111 | |
| 112 | src_data.data_in = input_interleaved ; |
| 113 | src_data.input_frames = frames ; |
| 114 | |
| 115 | src_data.data_out = output_interleaved ; |
| 116 | src_data.output_frames = frames ; |
| 117 | |
| 118 | if ((error = src_simple (&src_data, converter, channel_count))) |
| 119 | { printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ; |
| 120 | exit (1) ; |
| 121 | } ; |
| 122 | |
| 123 | if (fabs (src_data.output_frames_gen - src_data.src_ratio * src_data.input_frames) > 2) |
| 124 | { printf ("\n\nLine %d : bad output data length %ld should be %d.\n", __LINE__, |
| 125 | src_data.output_frames_gen, (int) floor (src_data.src_ratio * src_data.input_frames)) ; |
| 126 | printf ("\tsrc_ratio : %.4f\n", src_data.src_ratio) ; |
| 127 | printf ("\tinput_len : %ld\n", src_data.input_frames) ; |
| 128 | printf ("\toutput_len : %ld\n\n", src_data.output_frames_gen) ; |
| 129 | exit (1) ; |
| 130 | } ; |
| 131 | |
| 132 | /* De-interleave data so SNR can be calculated for each channel. */ |
| 133 | deinterleave_data (output_interleaved, output_serial, frames, channel_count) ; |
| 134 | |
| 135 | for (ch = 0 ; ch < channel_count ; ch++) |
| 136 | { snr = calculate_snr (output_serial + ch * frames, frames, 1) ; |
| 137 | if (snr < target_snr) |
| 138 | { printf ("\n\nLine %d: channel %d snr %f should be %f\n", __LINE__, ch, snr, target_snr) ; |
| 139 | save_oct_float ("output.dat", input_serial, channel_count * frames, output_serial, channel_count * frames) ; |
| 140 | exit (1) ; |
| 141 | } ; |
| 142 | } ; |
| 143 | |
| 144 | puts ("ok") ; |
| 145 | |
| 146 | return ; |
| 147 | } /* simple_test */ |
| 148 | |
| 149 | /*============================================================================== |
| 150 | */ |
| 151 | |
| 152 | static void |
| 153 | process_test (int converter, int channel_count, double target_snr) |
| 154 | { SRC_STATE *src_state ; |
| 155 | SRC_DATA src_data ; |
| 156 | |
| 157 | double freq, snr ; |
| 158 | int ch, error, frames, current_in, current_out ; |
| 159 | |
| 160 | printf ("\t%-22s (%2d channel%c) ............ ", "process_test", channel_count, channel_count > 1 ? 's' : ' ') ; |
| 161 | fflush (stdout) ; |
| 162 | |
| 163 | assert (channel_count <= MAX_CHANNELS) ; |
| 164 | |
| 165 | memset (input_serial, 0, sizeof (input_serial)) ; |
| 166 | memset (input_interleaved, 0, sizeof (input_interleaved)) ; |
| 167 | memset (output_interleaved, 0, sizeof (output_interleaved)) ; |
| 168 | memset (output_serial, 0, sizeof (output_serial)) ; |
| 169 | |
| 170 | frames = BUFFER_LEN ; |
| 171 | |
| 172 | /* Calculate channel_count separate windowed sine waves. */ |
| 173 | for (ch = 0 ; ch < channel_count ; ch++) |
| 174 | { freq = (400.0 + 11.333333333 * ch) / 44100.0 ; |
| 175 | gen_windowed_sines (1, &freq, 1.0, input_serial + ch * frames, frames) ; |
| 176 | } ; |
| 177 | |
| 178 | /* Interleave the data in preparation for SRC. */ |
| 179 | interleave_data (input_serial, input_interleaved, frames, channel_count) ; |
| 180 | |
| 181 | /* Perform sample rate conversion. */ |
| 182 | if ((src_state = src_new (converter, channel_count, &error)) == NULL) |
| 183 | { printf ("\n\nLine %d : src_new() failed : %s\n\n", __LINE__, src_strerror (error)) ; |
| 184 | exit (1) ; |
| 185 | } ; |
| 186 | |
| 187 | src_data.end_of_input = 0 ; /* Set this later. */ |
| 188 | |
| 189 | /* Choose a converstion ratio < 1.0. */ |
| 190 | src_data.src_ratio = 0.95 ; |
| 191 | |
| 192 | src_data.data_in = input_interleaved ; |
| 193 | src_data.data_out = output_interleaved ; |
| 194 | |
| 195 | current_in = current_out = 0 ; |
| 196 | |
| 197 | while (1) |
| 198 | { src_data.input_frames = MAX (MIN (BLOCK_LEN, frames - current_in), 0) ; |
| 199 | src_data.output_frames = MAX (MIN (BLOCK_LEN, frames - current_out), 0) ; |
| 200 | |
| 201 | if ((error = src_process (src_state, &src_data))) |
| 202 | { printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ; |
| 203 | exit (1) ; |
| 204 | } ; |
| 205 | |
| 206 | if (src_data.end_of_input && src_data.output_frames_gen == 0) |
| 207 | break ; |
| 208 | |
| 209 | current_in += src_data.input_frames_used ; |
| 210 | current_out += src_data.output_frames_gen ; |
| 211 | |
| 212 | src_data.data_in += src_data.input_frames_used * channel_count ; |
| 213 | src_data.data_out += src_data.output_frames_gen * channel_count ; |
| 214 | |
| 215 | src_data.end_of_input = (current_in >= frames) ? 1 : 0 ; |
| 216 | } ; |
| 217 | |
| 218 | src_state = src_delete (src_state) ; |
| 219 | |
| 220 | if (fabs (current_out - src_data.src_ratio * current_in) > 2) |
| 221 | { printf ("\n\nLine %d : bad output data length %d should be %d.\n", __LINE__, |
| 222 | current_out, (int) floor (src_data.src_ratio * current_in)) ; |
| 223 | printf ("\tsrc_ratio : %.4f\n", src_data.src_ratio) ; |
| 224 | printf ("\tinput_len : %d\n", frames) ; |
| 225 | printf ("\toutput_len : %d\n\n", current_out) ; |
| 226 | exit (1) ; |
| 227 | } ; |
| 228 | |
| 229 | /* De-interleave data so SNR can be calculated for each channel. */ |
| 230 | deinterleave_data (output_interleaved, output_serial, frames, channel_count) ; |
| 231 | |
| 232 | for (ch = 0 ; ch < channel_count ; ch++) |
| 233 | { snr = calculate_snr (output_serial + ch * frames, frames, 1) ; |
| 234 | if (snr < target_snr) |
| 235 | { printf ("\n\nLine %d: channel %d snr %f should be %f\n", __LINE__, ch, snr, target_snr) ; |
| 236 | save_oct_float ("output.dat", input_serial, channel_count * frames, output_serial, channel_count * frames) ; |
| 237 | exit (1) ; |
| 238 | } ; |
| 239 | } ; |
| 240 | |
| 241 | puts ("ok") ; |
| 242 | |
| 243 | return ; |
| 244 | } /* process_test */ |
| 245 | |
| 246 | /*============================================================================== |
| 247 | */ |
| 248 | |
| 249 | typedef struct |
| 250 | { int channels ; |
| 251 | long total_frames ; |
| 252 | long current_frame ; |
| 253 | float *data ; |
| 254 | } TEST_CB_DATA ; |
| 255 | |
| 256 | static long |
| 257 | test_callback_func (void *cb_data, float **data) |
| 258 | { TEST_CB_DATA *pcb_data ; |
| 259 | |
| 260 | long frames ; |
| 261 | |
| 262 | if ((pcb_data = cb_data) == NULL) |
| 263 | return 0 ; |
| 264 | |
| 265 | if (data == NULL) |
| 266 | return 0 ; |
| 267 | |
| 268 | *data = pcb_data->data + (pcb_data->current_frame * pcb_data->channels) ; |
| 269 | |
| 270 | if (pcb_data->total_frames - pcb_data->current_frame < BLOCK_LEN) |
| 271 | frames = pcb_data->total_frames - pcb_data->current_frame ; |
| 272 | else |
| 273 | frames = BLOCK_LEN ; |
| 274 | |
| 275 | pcb_data->current_frame += frames ; |
| 276 | |
| 277 | return frames ; |
| 278 | } /* test_callback_func */ |
| 279 | |
| 280 | static void |
| 281 | callback_test (int converter, int channel_count, double target_snr) |
| 282 | { TEST_CB_DATA test_callback_data ; |
| 283 | SRC_STATE *src_state = NULL ; |
| 284 | |
| 285 | double freq, snr, src_ratio ; |
| 286 | int ch, error, frames, read_total, read_count ; |
| 287 | |
| 288 | printf ("\t%-22s (%2d channel%c) ............ ", "callback_test", channel_count, channel_count > 1 ? 's' : ' ') ; |
| 289 | fflush (stdout) ; |
| 290 | |
| 291 | assert (channel_count <= MAX_CHANNELS) ; |
| 292 | |
| 293 | memset (input_serial, 0, sizeof (input_serial)) ; |
| 294 | memset (input_interleaved, 0, sizeof (input_interleaved)) ; |
| 295 | memset (output_interleaved, 0, sizeof (output_interleaved)) ; |
| 296 | memset (output_serial, 0, sizeof (output_serial)) ; |
| 297 | memset (&test_callback_data, 0, sizeof (test_callback_data)) ; |
| 298 | |
| 299 | frames = BUFFER_LEN ; |
| 300 | |
| 301 | /* Calculate channel_count separate windowed sine waves. */ |
| 302 | for (ch = 0 ; ch < channel_count ; ch++) |
| 303 | { freq = (200.0 + 33.333333333 * ch) / 44100.0 ; |
| 304 | gen_windowed_sines (1, &freq, 1.0, input_serial + ch * frames, frames) ; |
| 305 | } ; |
| 306 | |
| 307 | /* Interleave the data in preparation for SRC. */ |
| 308 | interleave_data (input_serial, input_interleaved, frames, channel_count) ; |
| 309 | |
| 310 | /* Perform sample rate conversion. */ |
| 311 | src_ratio = 0.95 ; |
| 312 | test_callback_data.channels = channel_count ; |
| 313 | test_callback_data.total_frames = frames ; |
| 314 | test_callback_data.current_frame = 0 ; |
| 315 | test_callback_data.data = input_interleaved ; |
| 316 | |
| 317 | if ((src_state = src_callback_new (test_callback_func, converter, channel_count, &error, &test_callback_data)) == NULL) |
| 318 | { printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ; |
| 319 | exit (1) ; |
| 320 | } ; |
| 321 | |
| 322 | read_total = 0 ; |
| 323 | while (read_total < frames) |
| 324 | { read_count = src_callback_read (src_state, src_ratio, frames - read_total, output_interleaved + read_total * channel_count) ; |
| 325 | |
| 326 | if (read_count <= 0) |
| 327 | break ; |
| 328 | |
| 329 | read_total += read_count ; |
| 330 | } ; |
| 331 | |
| 332 | if ((error = src_error (src_state)) != 0) |
| 333 | { printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ; |
| 334 | exit (1) ; |
| 335 | } ; |
| 336 | |
| 337 | src_state = src_delete (src_state) ; |
| 338 | |
| 339 | if (fabs (read_total - src_ratio * frames) > 2) |
| 340 | { printf ("\n\nLine %d : bad output data length %d should be %d.\n", __LINE__, |
| 341 | read_total, (int) floor (src_ratio * frames)) ; |
| 342 | printf ("\tsrc_ratio : %.4f\n", src_ratio) ; |
| 343 | printf ("\tinput_len : %d\n", frames) ; |
| 344 | printf ("\toutput_len : %d\n\n", read_total) ; |
| 345 | exit (1) ; |
| 346 | } ; |
| 347 | |
| 348 | /* De-interleave data so SNR can be calculated for each channel. */ |
| 349 | deinterleave_data (output_interleaved, output_serial, frames, channel_count) ; |
| 350 | |
| 351 | for (ch = 0 ; ch < channel_count ; ch++) |
| 352 | { snr = calculate_snr (output_serial + ch * frames, frames, 1) ; |
| 353 | if (snr < target_snr) |
| 354 | { printf ("\n\nLine %d: channel %d snr %f should be %f\n", __LINE__, ch, snr, target_snr) ; |
| 355 | save_oct_float ("output.dat", input_serial, channel_count * frames, output_serial, channel_count * frames) ; |
| 356 | exit (1) ; |
| 357 | } ; |
| 358 | } ; |
| 359 | |
| 360 | puts ("ok") ; |
| 361 | |
| 362 | return ; |
| 363 | } /* callback_test */ |
| 364 | |