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/>.
26 #include "aubio_priv.h"
27 #include "sink_wavwrite.h"
32 #define MAX_CHANNELS 6
35 #define FLOAT_TO_SHORT(x) (short)(x * 32768)
37 // swap endian of a short
38 #define SWAPS(x) ((x & 0xff) << 8) | ((x & 0xff00) >> 8)
40 // swap host to little endian
41 #if defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
42 #define HTOLES(x) SWAPS(x)
43 #elif defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
46 #define HTOLES(x) SWAPS(htons(x))
49 struct _aubio_sink_wavwrite_t {
54 uint_t total_frames_written;
61 unsigned short *scratch_data;
64 unsigned char *write_little_endian (unsigned int s, unsigned char *str, unsigned int length);
65 unsigned char *write_little_endian (unsigned int s, unsigned char *str, unsigned int length) {
67 for (i = 0; i < length; i++) {
68 str[i] = s >> (i * 8);
73 aubio_sink_wavwrite_t * new_aubio_sink_wavwrite(char_t * path, uint_t samplerate) {
74 aubio_sink_wavwrite_t * s = AUBIO_NEW(aubio_sink_wavwrite_t);
76 uint_t byterate, blockalign;
79 AUBIO_ERR("sink_wavwrite: Aborted opening null path\n");
82 if ((sint_t)samplerate < 0) {
83 AUBIO_ERR("sink_wavwrite: Can not create %s with samplerate %d\n", path, samplerate);
88 s->samplerate = samplerate;
89 s->max_size = MAX_SIZE;
91 s->bitspersample = 16;
92 s->total_frames_written = 0;
94 /* set output format */
95 s->fid = fopen((const char *)path, "wb");
97 AUBIO_ERR("sink_wavwrite: could not open %s (%s)\n", s->path, strerror(errno));
102 fwrite("RIFF", 4, 1, s->fid);
104 // ChunkSize (0 for now, actual size will be written in _close)
105 fwrite(write_little_endian(0, buf, 4), 4, 1, s->fid);
108 fwrite("WAVE", 4, 1, s->fid);
111 fwrite("fmt ", 4, 1, s->fid);
114 fwrite(write_little_endian(16, buf, 4), 4, 1, s->fid);
117 fwrite(write_little_endian(1, buf, 2), 2, 1, s->fid);
120 fwrite(write_little_endian(s->channels, buf, 2), 2, 1, s->fid);
123 fwrite(write_little_endian(s->samplerate, buf, 4), 4, 1, s->fid);
126 byterate = s->samplerate * s->channels * s->bitspersample / 8;
127 fwrite(write_little_endian(byterate, buf, 4), 4, 1, s->fid);
130 blockalign = s->channels * s->bitspersample / 8;
131 fwrite(write_little_endian(blockalign, buf, 2), 2, 1, s->fid);
134 fwrite(write_little_endian(s->bitspersample, buf, 2), 2, 1, s->fid);
137 fwrite("data", 4, 1, s->fid);
139 // Subchunk1Size (0 for now, actual size will be written in _close)
140 fwrite(write_little_endian(0, buf, 4), 4, 1, s->fid);
142 s->scratch_size = s->max_size * s->channels;
143 /* allocate data for de/interleaving reallocated when needed. */
144 if (s->scratch_size >= MAX_SIZE * MAX_CHANNELS) {
145 AUBIO_ERR("sink_wavwrite: %d x %d exceeds maximum buffer size %d\n",
146 s->max_size, s->channels, MAX_CHANNELS * MAX_CHANNELS);
150 s->scratch_data = AUBIO_ARRAY(unsigned short,s->scratch_size);
155 AUBIO_ERR("sink_wavwrite: can not write %s at samplerate %dHz\n",
156 s->path, s->samplerate);
157 del_aubio_sink_wavwrite(s);
162 void aubio_sink_wavwrite_do(aubio_sink_wavwrite_t *s, fvec_t * write_data, uint_t write){
163 uint_t i = 0, written_frames = 0;
165 if (write > s->max_size) {
166 AUBIO_WRN("sink_wavwrite: trying to write %d frames to %s, "
167 "but only %d can be written at a time\n", write, s->path, s->max_size);
171 for (i = 0; i < write; i++) {
172 s->scratch_data[i] = HTOLES(FLOAT_TO_SHORT(write_data->data[i]));
174 written_frames = fwrite(s->scratch_data, 2, write, s->fid);
176 if (written_frames != write) {
177 AUBIO_WRN("sink_wavwrite: trying to write %d frames to %s, "
178 "but only %d could be written\n", write, s->path, written_frames);
180 s->total_frames_written += written_frames;
184 void aubio_sink_wavwrite_close(aubio_sink_wavwrite_t * s) {
185 uint_t data_size = s->total_frames_written * s->bitspersample * s->channels / 8;
186 unsigned char buf[5];
189 fseek(s->fid, 4, SEEK_SET);
190 fwrite(write_little_endian(data_size + 36, buf, 4), 4, 1, s->fid);
192 fseek(s->fid, 40, SEEK_SET);
193 fwrite(write_little_endian(data_size, buf, 4), 4, 1, s->fid);
195 if (fclose(s->fid)) {
196 AUBIO_ERR("sink_wavwrite: Error closing file %s (%s)\n", s->path, strerror(errno));
201 void del_aubio_sink_wavwrite(aubio_sink_wavwrite_t * s){
203 aubio_sink_wavwrite_close(s);
204 AUBIO_FREE(s->scratch_data);
208 #endif /* HAVE_WAVWRITE */