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/>.
25 #include "aubio_priv.h"
28 #include "source_wavread.h"
32 #define AUBIO_WAVREAD_BUFSIZE 1024
34 #define SHORT_TO_FLOAT(x) (smpl_t)(x * 3.0517578125e-05)
36 struct _aubio_source_wavread_t {
41 // some data about the file
43 uint_t input_samplerate;
44 uint_t input_channels;
57 unsigned char *short_output;
61 unsigned int read_little_endian (unsigned char *buf, unsigned int length);
62 unsigned int read_little_endian (unsigned char *buf, unsigned int length) {
64 for (i = 0; i < length; i++) {
65 ret += buf[i] << (i * 8);
70 aubio_source_wavread_t * new_aubio_source_wavread(char_t * path, uint_t samplerate, uint_t hop_size) {
71 aubio_source_wavread_t * s = AUBIO_NEW(aubio_source_wavread_t);
72 size_t bytes_read = 0, bytes_expected = 44;
74 unsigned int format, channels, sr, byterate, blockalign, bitspersample;//, data_size;
77 AUBIO_ERR("source_wavread: Aborted opening null path\n");
80 if ((sint_t)samplerate < 0) {
81 AUBIO_ERR("source_wavread: Can not open %s with samplerate %d\n", path, samplerate);
84 if ((sint_t)hop_size <= 0) {
85 AUBIO_ERR("source_wavread: Can not open %s with hop_size %d\n", path, hop_size);
90 s->samplerate = samplerate;
91 s->hop_size = hop_size;
93 s->fid = fopen((const char *)path, "rb");
95 AUBIO_ERR("source_wavread: Failed opening %s (System error: %s)\n", s->path, strerror(errno));
100 bytes_read += fread(buf, 1, 4, s->fid);
102 if ( strcmp((const char *)buf, "RIFF") != 0 ) {
103 AUBIO_ERR("source_wavread: could not find RIFF header in %s\n", s->path);
108 bytes_read += fread(buf, 1, 4, s->fid);
111 bytes_read += fread(buf, 1, 4, s->fid);
113 if ( strcmp((const char *)buf, "WAVE") != 0 ) {
114 AUBIO_ERR("source_wavread: wrong format in RIFF header in %s\n", s->path);
119 bytes_read += fread(buf, 1, 4, s->fid);
121 if ( strcmp((const char *)buf, "fmt ") != 0 ) {
122 AUBIO_ERR("source_wavread: fmt RIFF header in %s\n", s->path);
127 bytes_read += fread(buf, 1, 4, s->fid);
128 format = read_little_endian(buf, 4);
129 if ( format != 16 ) {
130 // TODO accept format 18
131 AUBIO_ERR("source_wavread: file %s is not encoded with PCM\n", s->path);
134 if ( buf[1] || buf[2] | buf[3] ) {
135 AUBIO_ERR("source_wavread: Subchunk1Size should be 0, in %s\n", s->path);
140 bytes_read += fread(buf, 1, 2, s->fid);
141 if ( buf[0] != 1 || buf[1] != 0) {
142 AUBIO_ERR("source_wavread: AudioFormat should be PCM, in %s\n", s->path);
147 bytes_read += fread(buf, 1, 2, s->fid);
148 channels = read_little_endian(buf, 2);
151 bytes_read += fread(buf, 1, 4, s->fid);
152 sr = read_little_endian(buf, 4);
155 bytes_read += fread(buf, 1, 4, s->fid);
156 byterate = read_little_endian(buf, 4);
159 bytes_read += fread(buf, 1, 2, s->fid);
160 blockalign = read_little_endian(buf, 2);
163 bytes_read += fread(buf, 1, 2, s->fid);
164 bitspersample = read_little_endian(buf, 2);
166 if ( bitspersample != 16 ) {
167 AUBIO_ERR("source_wavread: can not process %dbit file %s\n",
168 bitspersample, s->path);
173 if ( byterate * 8 != sr * channels * bitspersample ) {
174 AUBIO_ERR("source_wavread: wrong byterate in %s\n", s->path);
178 if ( blockalign * 8 != channels * bitspersample ) {
179 AUBIO_ERR("source_wavread: wrong blockalign in %s\n", s->path);
183 s->input_samplerate = sr;
184 s->input_channels = channels;
187 AUBIO_DBG("channels %d\n", channels);
188 AUBIO_DBG("sr %d\n", sr);
189 AUBIO_DBG("byterate %d\n", byterate);
190 AUBIO_DBG("blockalign %d\n", blockalign);
191 AUBIO_DBG("bitspersample %d\n", bitspersample);
193 AUBIO_DBG("found %d channels in %s\n", s->input_channels, s->path);
194 AUBIO_DBG("found %d samplerate in %s\n", s->input_samplerate, s->path);
197 if (samplerate == 0) {
198 s->samplerate = s->input_samplerate;
199 } else if (samplerate != s->input_samplerate) {
200 AUBIO_ERR("source_wavread: can not resample %s from %d to %dHz\n",
201 s->path, s->input_samplerate, samplerate);
206 bytes_read += fread(buf, 1, 4, s->fid);
208 if ( strcmp((const char *)buf, "data") != 0 ) {
209 AUBIO_ERR("source_wavread: data RIFF header not found in %s\n", s->path);
214 bytes_read += fread(buf, 1, 4, s->fid);
215 //data_size = buf[0] + (buf[1] << 8) + (buf[2] << 16) + (buf[3] << 24);
216 //AUBIO_MSG("found %d frames in %s\n", 8 * data_size / bitspersample / channels, s->path);
218 // check the total number of bytes read is correct
219 if ( bytes_read != bytes_expected ) {
220 #ifndef HAVE_WIN_HACKS
221 AUBIO_ERR("source_wavread: short read (%zd instead of %zd) in %s\n",
222 #else // mingw does not know about %zd...
223 AUBIO_ERR("source_wavread: short read (%d instead of %d) in %s\n",
225 bytes_read, bytes_expected, s->path);
228 s->seek_start = bytes_read;
230 s->output = new_fmat(s->input_channels, AUBIO_WAVREAD_BUFSIZE);
231 s->blockalign= blockalign;
232 s->bitspersample = bitspersample;
234 s->short_output = (unsigned char *)calloc(s->blockalign, AUBIO_WAVREAD_BUFSIZE);
242 //AUBIO_ERR("source_wavread: can not read %s at samplerate %dHz with a hop_size of %d\n",
243 // s->path, s->samplerate, s->hop_size);
244 del_aubio_source_wavread(s);
248 void aubio_source_wavread_readframe(aubio_source_wavread_t *s, uint_t *wavread_read);
250 void aubio_source_wavread_readframe(aubio_source_wavread_t *s, uint_t *wavread_read) {
251 unsigned char *short_ptr = s->short_output;
252 size_t read = fread(short_ptr, s->blockalign, AUBIO_WAVREAD_BUFSIZE, s->fid);
253 uint_t i, j, b, bitspersample = s->bitspersample;
254 uint_t wrap_at = (1 << ( bitspersample - 1 ) );
255 uint_t wrap_with = (1 << bitspersample);
256 smpl_t scaler = 1. / wrap_at;
258 unsigned int unsigned_val = 0;
260 for (j = 0; j < read; j++) {
261 for (i = 0; i < s->input_channels; i++) {
263 for (b = 0; b < bitspersample; b+=8 ) {
264 unsigned_val += *(short_ptr) << b;
267 signed_val = unsigned_val;
268 // FIXME why does 8 bit conversion maps [0;255] to [-128;127]
269 // instead of [0;127] to [0;127] and [128;255] to [-128;-1]
270 if (bitspersample == 8) signed_val -= wrap_at;
271 else if (unsigned_val >= wrap_at) signed_val = unsigned_val - wrap_with;
272 s->output->data[i][j] = signed_val * scaler;
276 *wavread_read = read;
278 if (read == 0) s->eof = 1;
281 void aubio_source_wavread_do(aubio_source_wavread_t * s, fvec_t * read_data, uint_t * read){
284 uint_t total_wrote = 0;
285 while (total_wrote < s->hop_size) {
286 end = MIN(s->read_samples - s->read_index, s->hop_size - total_wrote);
287 for (i = 0; i < end; i++) {
288 read_data->data[i + total_wrote] = 0;
289 for (j = 0; j < s->input_channels; j++ ) {
290 read_data->data[i + total_wrote] += s->output->data[j][i + s->read_index];
292 read_data->data[i + total_wrote] /= (smpl_t)(s->input_channels);
295 if (total_wrote < s->hop_size) {
296 uint_t wavread_read = 0;
297 aubio_source_wavread_readframe(s, &wavread_read);
298 s->read_samples = wavread_read;
304 s->read_index += end;
307 if (total_wrote < s->hop_size) {
308 for (i = end; i < s->hop_size; i++) {
309 read_data->data[i] = 0.;
315 void aubio_source_wavread_do_multi(aubio_source_wavread_t * s, fmat_t * read_data, uint_t * read){
318 uint_t total_wrote = 0;
319 while (total_wrote < s->hop_size) {
320 end = MIN(s->read_samples - s->read_index, s->hop_size - total_wrote);
321 for (j = 0; j < read_data->height; j++) {
322 for (i = 0; i < end; i++) {
323 read_data->data[j][i + total_wrote] = s->output->data[j][i];
327 if (total_wrote < s->hop_size) {
328 uint_t wavread_read = 0;
329 aubio_source_wavread_readframe(s, &wavread_read);
330 s->read_samples = wavread_read;
336 s->read_index += end;
339 if (total_wrote < s->hop_size) {
340 for (j = 0; j < read_data->height; j++) {
341 for (i = end; i < s->hop_size; i++) {
342 read_data->data[j][i] = 0.;
349 uint_t aubio_source_wavread_get_samplerate(aubio_source_wavread_t * s) {
350 return s->samplerate;
353 uint_t aubio_source_wavread_get_channels(aubio_source_wavread_t * s) {
354 return s->input_channels;
357 uint_t aubio_source_wavread_seek (aubio_source_wavread_t * s, uint_t pos) {
359 if ((sint_t)pos < 0) {
362 ret = fseek(s->fid, s->seek_start + pos * s->blockalign, SEEK_SET);
364 AUBIO_ERR("source_wavread: could not seek %s at %d (%s)\n", s->path, pos, strerror(errno));
373 uint_t aubio_source_wavread_close (aubio_source_wavread_t * s) {
377 if (fclose(s->fid)) {
378 AUBIO_ERR("source_wavread: could not close %s (%s)\n", s->path, strerror(errno));
385 void del_aubio_source_wavread(aubio_source_wavread_t * s) {
387 aubio_source_wavread_close(s);
388 if (s->short_output) AUBIO_FREE(s->short_output);
389 if (s->output) del_fmat(s->output);
393 #endif /* HAVE_WAVREAD */