2 Copyright (C) 2014 Paul Brossier <piem@aubio.org>
4 This file is part of aubio.
6 aubio is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 aubio is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with aubio. If not, see <http://www.gnu.org/licenses/>.
21 #include "aubio_priv.h"
27 #include "source_wavread.h"
31 #define AUBIO_WAVREAD_BUFSIZE 1024
33 #define SHORT_TO_FLOAT(x) (smpl_t)(x * 3.0517578125e-05)
35 struct _aubio_source_wavread_t {
40 // some data about the file
42 uint_t input_samplerate;
43 uint_t input_channels;
58 unsigned char *short_output;
62 static unsigned int read_little_endian (unsigned char *buf,
65 static unsigned int read_little_endian (unsigned char *buf,
69 for (i = 0; i < length; i++) {
70 ret += buf[i] << (i * 8);
75 aubio_source_wavread_t * new_aubio_source_wavread(const char_t * path, uint_t samplerate, uint_t hop_size) {
76 aubio_source_wavread_t * s = AUBIO_NEW(aubio_source_wavread_t);
77 size_t bytes_read = 0, bytes_junk = 0, bytes_expected = 44;
78 unsigned char buf[5] = "\0";
79 unsigned int format, channels, sr, byterate, blockalign, duration, bitspersample;//, data_size;
82 AUBIO_ERR("source_wavread: Aborted opening null path\n");
85 if ((sint_t)samplerate < 0) {
86 AUBIO_ERR("source_wavread: Can not open %s with samplerate %d\n", path, samplerate);
89 if ((sint_t)hop_size <= 0) {
90 AUBIO_ERR("source_wavread: Can not open %s with hop_size %d\n", path, hop_size);
94 if (s->path) AUBIO_FREE(s->path);
95 s->path = AUBIO_ARRAY(char_t, strnlen(path, PATH_MAX) + 1);
96 strncpy(s->path, path, strnlen(path, PATH_MAX) + 1);
98 s->samplerate = samplerate;
99 s->hop_size = hop_size;
101 s->fid = fopen((const char *)path, "rb");
103 AUBIO_ERR("source_wavread: Failed opening %s (System error: %s)\n", s->path, strerror(errno));
108 bytes_read += fread(buf, 1, 4, s->fid);
110 if ( strcmp((const char *)buf, "RIFF") != 0 ) {
111 AUBIO_ERR("source_wavread: Failed opening %s (could not find RIFF header)\n", s->path);
116 bytes_read += fread(buf, 1, 4, s->fid);
119 bytes_read += fread(buf, 1, 4, s->fid);
121 if ( strcmp((const char *)buf, "WAVE") != 0 ) {
122 AUBIO_ERR("source_wavread: Failed opening %s (wrong format in RIFF header)\n", s->path);
127 bytes_read += fread(buf, 1, 4, s->fid);
130 // check if we have a JUNK Chunk
131 if ( strcmp((const char *)buf, "JUNK") == 0 ) {
132 bytes_junk = fread(buf, 1, 4, s->fid);
134 bytes_junk += read_little_endian(buf, 4);
135 if (fseek(s->fid, bytes_read + bytes_junk, SEEK_SET) != 0) {
136 AUBIO_ERR("source_wavread: Failed opening %s (could not seek past JUNK Chunk: %s)\n",
137 s->path, strerror(errno));
140 bytes_read += bytes_junk;
141 bytes_expected += bytes_junk + 4;
142 // now really read the fmt chunk
143 bytes_read += fread(buf, 1, 4, s->fid);
148 if ( strcmp((const char *)buf, "fmt ") != 0 ) {
149 AUBIO_ERR("source_wavread: Failed opening %s (could not find 'fmt ' in RIFF header)\n", s->path);
154 bytes_read += fread(buf, 1, 4, s->fid);
155 format = read_little_endian(buf, 4);
156 if ( format != 16 ) {
157 // TODO accept format 18
158 AUBIO_ERR("source_wavread: Failed opening %s (not encoded with PCM)\n", s->path);
161 if ( buf[1] || buf[2] | buf[3] ) {
162 AUBIO_ERR("source_wavread: Failed opening %s (Subchunk1Size should be 0)\n", s->path);
167 bytes_read += fread(buf, 1, 2, s->fid);
168 if ( buf[0] != 1 || buf[1] != 0) {
169 AUBIO_ERR("source_wavread: Failed opening %s (AudioFormat should be PCM)\n", s->path);
174 bytes_read += fread(buf, 1, 2, s->fid);
175 channels = read_little_endian(buf, 2);
178 bytes_read += fread(buf, 1, 4, s->fid);
179 sr = read_little_endian(buf, 4);
182 bytes_read += fread(buf, 1, 4, s->fid);
183 byterate = read_little_endian(buf, 4);
186 bytes_read += fread(buf, 1, 2, s->fid);
187 blockalign = read_little_endian(buf, 2);
190 bytes_read += fread(buf, 1, 2, s->fid);
191 bitspersample = read_little_endian(buf, 2);
193 if ( bitspersample != 16 ) {
194 AUBIO_ERR("source_wavread: can not process %dbit file %s\n",
195 bitspersample, s->path);
200 if ( byterate * 8 != sr * channels * bitspersample ) {
201 AUBIO_ERR("source_wavread: Failed opening %s (wrong byterate)\n", s->path);
205 if ( blockalign * 8 != channels * bitspersample ) {
206 AUBIO_ERR("source_wavread: Failed opening %s (wrong blockalign)\n", s->path);
210 s->input_samplerate = sr;
211 s->input_channels = channels;
214 AUBIO_DBG("channels %d\n", channels);
215 AUBIO_DBG("sr %d\n", sr);
216 AUBIO_DBG("byterate %d\n", byterate);
217 AUBIO_DBG("blockalign %d\n", blockalign);
218 AUBIO_DBG("bitspersample %d\n", bitspersample);
220 AUBIO_DBG("found %d channels in %s\n", s->input_channels, s->path);
221 AUBIO_DBG("found %d samplerate in %s\n", s->input_samplerate, s->path);
224 if (samplerate == 0) {
225 s->samplerate = s->input_samplerate;
226 } else if (samplerate != s->input_samplerate) {
227 AUBIO_ERR("source_wavread: can not resample %s from %d to %dHz\n",
228 s->path, s->input_samplerate, samplerate);
233 bytes_read += fread(buf, 1, 4, s->fid);
235 while ( strcmp((const char *)buf, "data") != 0 ) {
236 if (feof(s->fid) || ferror(s->fid)) {
237 AUBIO_ERR("source_wavread: no data RIFF header found in %s\n", s->path);
240 bytes_junk = fread(buf, 1, 4, s->fid);
242 bytes_junk += read_little_endian(buf, 4);
243 if (fseek(s->fid, bytes_read + bytes_junk, SEEK_SET) != 0) {
244 AUBIO_ERR("source_wavread: could not seek past unknown chunk in %s (%s)\n",
245 s->path, strerror(errno));
248 bytes_read += bytes_junk;
249 bytes_expected += bytes_junk+ 4;
250 bytes_read += fread(buf, 1, 4, s->fid);
255 bytes_read += fread(buf, 1, 4, s->fid);
256 duration = read_little_endian(buf, 4) / blockalign;
258 //data_size = buf[0] + (buf[1] << 8) + (buf[2] << 16) + (buf[3] << 24);
259 //AUBIO_MSG("found %d frames in %s\n", 8 * data_size / bitspersample / channels, s->path);
261 // check the total number of bytes read is correct
262 if ( bytes_read != bytes_expected ) {
263 #ifndef HAVE_WIN_HACKS
264 AUBIO_ERR("source_wavread: short read (%zd instead of %zd) in %s\n",
265 bytes_read, bytes_expected, s->path);
266 #else // mingw does not know about %zd...
267 AUBIO_ERR("source_wavread: short read (%d instead of %d) in %s\n",
268 (int)bytes_read, (int)bytes_expected, s->path);
272 s->seek_start = bytes_read;
274 s->output = new_fmat(s->input_channels, AUBIO_WAVREAD_BUFSIZE);
275 s->blockalign= blockalign;
276 s->bitspersample = bitspersample;
278 s->duration = duration;
280 s->short_output = (unsigned char *)calloc(s->blockalign, AUBIO_WAVREAD_BUFSIZE);
288 //AUBIO_ERR("source_wavread: can not read %s at samplerate %dHz with a hop_size of %d\n",
289 // s->path, s->samplerate, s->hop_size);
290 del_aubio_source_wavread(s);
294 void aubio_source_wavread_readframe(aubio_source_wavread_t *s, uint_t *wavread_read);
296 void aubio_source_wavread_readframe(aubio_source_wavread_t *s, uint_t *wavread_read) {
297 unsigned char *short_ptr = s->short_output;
298 size_t read = fread(short_ptr, s->blockalign, AUBIO_WAVREAD_BUFSIZE, s->fid);
299 uint_t i, j, b, bitspersample = s->bitspersample;
300 uint_t wrap_at = (1 << ( bitspersample - 1 ) );
301 uint_t wrap_with = (1 << bitspersample);
302 smpl_t scaler = 1. / wrap_at;
304 unsigned int unsigned_val = 0;
306 for (j = 0; j < read; j++) {
307 for (i = 0; i < s->input_channels; i++) {
309 for (b = 0; b < bitspersample; b+=8 ) {
310 unsigned_val += *(short_ptr) << b;
313 signed_val = unsigned_val;
314 // FIXME why does 8 bit conversion maps [0;255] to [-128;127]
315 // instead of [0;127] to [0;127] and [128;255] to [-128;-1]
316 if (bitspersample == 8) signed_val -= wrap_at;
317 else if (unsigned_val >= wrap_at) signed_val = unsigned_val - wrap_with;
318 s->output->data[i][j] = signed_val * scaler;
322 *wavread_read = read;
324 if (read == 0) s->eof = 1;
327 void aubio_source_wavread_do(aubio_source_wavread_t * s, fvec_t * read_data, uint_t * read){
330 uint_t total_wrote = 0;
331 if (s->fid == NULL) {
332 AUBIO_ERR("source_wavread: could not read from %s (file not opened)\n",
336 while (total_wrote < s->hop_size) {
337 end = MIN(s->read_samples - s->read_index, s->hop_size - total_wrote);
338 for (i = 0; i < end; i++) {
339 read_data->data[i + total_wrote] = 0;
340 for (j = 0; j < s->input_channels; j++ ) {
341 read_data->data[i + total_wrote] += s->output->data[j][i + s->read_index];
343 read_data->data[i + total_wrote] /= (smpl_t)(s->input_channels);
346 if (total_wrote < s->hop_size) {
347 uint_t wavread_read = 0;
348 aubio_source_wavread_readframe(s, &wavread_read);
349 s->read_samples = wavread_read;
355 s->read_index += end;
358 if (total_wrote < s->hop_size) {
359 for (i = end; i < s->hop_size; i++) {
360 read_data->data[i] = 0.;
366 void aubio_source_wavread_do_multi(aubio_source_wavread_t * s, fmat_t * read_data, uint_t * read){
369 uint_t total_wrote = 0;
370 if (s->fid == NULL) {
371 AUBIO_ERR("source_wavread: could not read from %s (file not opened)\n",
375 while (total_wrote < s->hop_size) {
376 end = MIN(s->read_samples - s->read_index, s->hop_size - total_wrote);
377 for (j = 0; j < read_data->height; j++) {
378 for (i = 0; i < end; i++) {
379 read_data->data[j][i + total_wrote] = s->output->data[j][i];
383 if (total_wrote < s->hop_size) {
384 uint_t wavread_read = 0;
385 aubio_source_wavread_readframe(s, &wavread_read);
386 s->read_samples = wavread_read;
392 s->read_index += end;
395 if (total_wrote < s->hop_size) {
396 for (j = 0; j < read_data->height; j++) {
397 for (i = end; i < s->hop_size; i++) {
398 read_data->data[j][i] = 0.;
405 uint_t aubio_source_wavread_get_samplerate(aubio_source_wavread_t * s) {
406 return s->samplerate;
409 uint_t aubio_source_wavread_get_channels(aubio_source_wavread_t * s) {
410 return s->input_channels;
413 uint_t aubio_source_wavread_seek (aubio_source_wavread_t * s, uint_t pos) {
415 if (s->fid == NULL) {
416 AUBIO_ERR("source_wavread: could not seek %s (file not opened?)\n", s->path, pos);
419 if ((sint_t)pos < 0) {
420 AUBIO_ERR("source_wavread: could not seek %s at %d (seeking position should be >= 0)\n", s->path, pos);
423 ret = fseek(s->fid, s->seek_start + pos * s->blockalign, SEEK_SET);
425 AUBIO_ERR("source_wavread: could not seek %s at %d (%s)\n", s->path, pos, strerror(errno));
434 uint_t aubio_source_wavread_get_duration (const aubio_source_wavread_t * s) {
435 if (s && s->duration) {
441 uint_t aubio_source_wavread_close (aubio_source_wavread_t * s) {
445 if (fclose(s->fid)) {
446 AUBIO_ERR("source_wavread: could not close %s (%s)\n", s->path, strerror(errno));
453 void del_aubio_source_wavread(aubio_source_wavread_t * s) {
455 aubio_source_wavread_close(s);
456 if (s->short_output) AUBIO_FREE(s->short_output);
457 if (s->output) del_fmat(s->output);
458 if (s->path) AUBIO_FREE(s->path);
462 #endif /* HAVE_WAVREAD */