ref: b1ed6ce4dd48b7328ecba01c73010a5ea7d12c1c
dir: /src/io/sink_wavwrite.c/
/*
Copyright (C) 2014 Paul Brossier <piem@aubio.org>
This file is part of aubio.
aubio 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 3 of the License, or
(at your option) any later version.
aubio 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 aubio. If not, see <http://www.gnu.org/licenses/>.
*/
#include "aubio_priv.h"
#ifdef HAVE_WAVWRITE
#include "fvec.h"
#include "fmat.h"
#include "io/sink_wavwrite.h"
#include "io/ioutils.h"
#define MAX_SIZE 4096
#define FLOAT_TO_SHORT(x) (short)(x * 32768)
// swap endian of a short
#define SWAPS(x) ((x & 0xff) << 8) | ((x & 0xff00) >> 8)
// swap host to little endian
#if defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
#define HTOLES(x) SWAPS(x)
#elif defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
#define HTOLES(x) x
#else
#ifdef HAVE_WIN_HACKS
#define HTOLES(x) x
#else
#define HTOLES(x) SWAPS(htons(x))
#endif
#endif
uint_t aubio_sink_wavwrite_open(aubio_sink_wavwrite_t *s);
struct _aubio_sink_wavwrite_t {
char_t *path;
uint_t samplerate;
uint_t channels;
uint_t bitspersample;
uint_t total_frames_written;
FILE *fid;
uint_t max_size;
uint_t scratch_size;
unsigned short *scratch_data;
};
static unsigned char *write_little_endian (unsigned int s, unsigned char *str,
unsigned int length);
static unsigned char *write_little_endian (unsigned int s, unsigned char *str,
unsigned int length)
{
uint_t i;
for (i = 0; i < length; i++) {
str[i] = s >> (i * 8);
}
return str;
}
aubio_sink_wavwrite_t * new_aubio_sink_wavwrite(const char_t * path, uint_t samplerate) {
aubio_sink_wavwrite_t * s = AUBIO_NEW(aubio_sink_wavwrite_t);
if (path == NULL) {
AUBIO_ERR("sink_wavwrite: Aborted opening null path\n");
goto beach;
}
s->path = AUBIO_ARRAY(char_t, strnlen(path, PATH_MAX) + 1);
strncpy(s->path, path, strnlen(path, PATH_MAX) + 1);
s->max_size = MAX_SIZE;
s->bitspersample = 16;
s->total_frames_written = 0;
s->samplerate = 0;
s->channels = 0;
// zero samplerate given. do not open yet
if ((sint_t)samplerate == 0) {
return s;
}
// invalid samplerate given, abort
if (aubio_io_validate_samplerate("sink_wavwrite", s->path, samplerate)) {
goto beach;
}
s->samplerate = samplerate;
s->channels = 1;
if (aubio_sink_wavwrite_open(s) != AUBIO_OK) {
// open failed, abort
goto beach;
}
return s;
beach:
//AUBIO_ERR("sink_wavwrite: failed creating %s with samplerate %dHz\n",
// s->path, s->samplerate);
del_aubio_sink_wavwrite(s);
return NULL;
}
uint_t aubio_sink_wavwrite_preset_samplerate(aubio_sink_wavwrite_t *s, uint_t samplerate)
{
if (aubio_io_validate_samplerate("sink_wavwrite", s->path, samplerate)) {
return AUBIO_FAIL;
}
s->samplerate = samplerate;
// automatically open when both samplerate and channels have been set
if (/* s->samplerate != 0 && */ s->channels != 0) {
return aubio_sink_wavwrite_open(s);
}
return AUBIO_OK;
}
uint_t aubio_sink_wavwrite_preset_channels(aubio_sink_wavwrite_t *s, uint_t channels)
{
if (aubio_io_validate_channels("sink_wavwrite", s->path, channels)) {
return AUBIO_FAIL;
}
s->channels = channels;
// automatically open when both samplerate and channels have been set
if (s->samplerate != 0 /* && s->channels != 0 */) {
return aubio_sink_wavwrite_open(s);
}
return AUBIO_OK;
}
uint_t aubio_sink_wavwrite_get_samplerate(const aubio_sink_wavwrite_t *s)
{
return s->samplerate;
}
uint_t aubio_sink_wavwrite_get_channels(const aubio_sink_wavwrite_t *s)
{
return s->channels;
}
uint_t aubio_sink_wavwrite_open(aubio_sink_wavwrite_t *s) {
unsigned char buf[5];
uint_t byterate, blockalign;
size_t written = 0;
/* open output file */
s->fid = fopen((const char *)s->path, "wb");
if (!s->fid) {
AUBIO_STRERR("sink_wavwrite: could not open %s (%s)\n", s->path, errorstr);
goto beach;
}
// ChunkID
written += fwrite("RIFF", 4, 1, s->fid);
// ChunkSize (0 for now, actual size will be written in _close)
written += fwrite(write_little_endian(0, buf, 4), 4, 1, s->fid);
// Format
written += fwrite("WAVE", 4, 1, s->fid);
// Subchunk1ID
written += fwrite("fmt ", 4, 1, s->fid);
// Subchunk1Size
written += fwrite(write_little_endian(16, buf, 4), 4, 1, s->fid);
// AudioFormat
written += fwrite(write_little_endian(1, buf, 2), 2, 1, s->fid);
// NumChannels
written += fwrite(write_little_endian(s->channels, buf, 2), 2, 1, s->fid);
// SampleRate
written += fwrite(write_little_endian(s->samplerate, buf, 4), 4, 1, s->fid);
// ByteRate
byterate = s->samplerate * s->channels * s->bitspersample / 8;
written += fwrite(write_little_endian(byterate, buf, 4), 4, 1, s->fid);
// BlockAlign
blockalign = s->channels * s->bitspersample / 8;
written += fwrite(write_little_endian(blockalign, buf, 2), 2, 1, s->fid);
// BitsPerSample
written += fwrite(write_little_endian(s->bitspersample, buf, 2), 2, 1, s->fid);
// Subchunk2ID
written += fwrite("data", 4, 1, s->fid);
// Subchunk1Size (0 for now, actual size will be written in _close)
written += fwrite(write_little_endian(0, buf, 4), 4, 1, s->fid);
// fwrite(*, *, 1, s->fid) was called 13 times, check success
if (written != 13 || fflush(s->fid)) {
AUBIO_STRERR("sink_wavwrite: writing header to %s failed"
" (wrote %d/%d, %s)\n", s->path, written, 13, errorstr);
fclose(s->fid);
s->fid = NULL;
return AUBIO_FAIL;
}
s->scratch_size = s->max_size * s->channels;
/* allocate data for de/interleaving reallocated when needed. */
if (s->scratch_size >= MAX_SIZE * AUBIO_MAX_CHANNELS) {
AUBIO_ERR("sink_wavwrite: %d x %d exceeds SIZE maximum buffer size %d\n",
s->max_size, s->channels, MAX_SIZE * AUBIO_MAX_CHANNELS);
goto beach;
}
s->scratch_data = AUBIO_ARRAY(unsigned short,s->scratch_size);
return AUBIO_OK;
beach:
return AUBIO_FAIL;
}
static
void aubio_sink_wavwrite_write_frames(aubio_sink_wavwrite_t *s, uint_t write)
{
uint_t written_frames = 0;
written_frames = fwrite(s->scratch_data, 2 * s->channels, write, s->fid);
if (written_frames != write) {
AUBIO_STRERR("sink_wavwrite: trying to write %d frames to %s, but only %d"
" could be written (%s)\n", write, s->path, written_frames, errorstr);
}
s->total_frames_written += written_frames;
}
void aubio_sink_wavwrite_do(aubio_sink_wavwrite_t *s, fvec_t * write_data, uint_t write){
uint_t c = 0, i = 0;
uint_t length = aubio_sink_validate_input_length("sink_wavwrite", s->path,
s->max_size, write_data->length, write);
for (c = 0; c < s->channels; c++) {
for (i = 0; i < length; i++) {
s->scratch_data[i * s->channels + c] = HTOLES(FLOAT_TO_SHORT(write_data->data[i]));
}
}
aubio_sink_wavwrite_write_frames(s, length);
}
void aubio_sink_wavwrite_do_multi(aubio_sink_wavwrite_t *s, fmat_t * write_data, uint_t write){
uint_t c = 0, i = 0;
uint_t channels = aubio_sink_validate_input_channels("sink_wavwrite", s->path,
s->channels, write_data->height);
uint_t length = aubio_sink_validate_input_length("sink_wavwrite", s->path,
s->max_size, write_data->length, write);
for (c = 0; c < channels; c++) {
for (i = 0; i < length; i++) {
s->scratch_data[i * s->channels + c] = HTOLES(FLOAT_TO_SHORT(write_data->data[c][i]));
}
}
aubio_sink_wavwrite_write_frames(s, length);
}
uint_t aubio_sink_wavwrite_close(aubio_sink_wavwrite_t * s) {
uint_t data_size = s->total_frames_written * s->bitspersample * s->channels / 8;
unsigned char buf[5];
size_t written = 0, err = 0;
if (!s->fid) return AUBIO_FAIL;
// ChunkSize
err += fseek(s->fid, 4, SEEK_SET);
written += fwrite(write_little_endian(data_size + 36, buf, 4), 4, 1, s->fid);
// Subchunk2Size
err += fseek(s->fid, 40, SEEK_SET);
written += fwrite(write_little_endian(data_size, buf, 4), 4, 1, s->fid);
if (written != 2 || err != 0) {
AUBIO_STRERR("sink_wavwrite: updating header of %s failed, expected %d"
" write but got only %d (%s)\n", s->path, 2, written, errorstr);
}
// close file
if (fclose(s->fid)) {
AUBIO_STRERR("sink_wavwrite: Error closing file %s (%s)\n", s->path, errorstr);
}
s->fid = NULL;
return AUBIO_OK;
}
void del_aubio_sink_wavwrite(aubio_sink_wavwrite_t * s){
AUBIO_ASSERT(s);
if (s->fid)
aubio_sink_wavwrite_close(s);
if (s->path)
AUBIO_FREE(s->path);
if (s->scratch_data)
AUBIO_FREE(s->scratch_data);
AUBIO_FREE(s);
}
#endif /* HAVE_WAVWRITE */