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/*
DeaDBeeF - ultimate music player for GNU/Linux systems with X11
Copyright (C) 2009-2010 Alexey Yakovenko <waker@users.sourceforge.net>
This program 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 2
of the License, or (at your option) any later version.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <samplerate.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include "conf.h"
#include "threading.h"
#include "deadbeef.h"
#include "src.h"
//#define trace(...) { fprintf(stderr, __VA_ARGS__); }
#define trace(fmt,...)
DB_functions_t *deadbeef;
#define SRC_BUFFER 16000
#define SRC_MAX_CHANNELS 8
ddb_dsp_src_t plugin;
typedef struct {
DB_dsp_instance_t inst;
int quality;
SRC_STATE *src;
SRC_DATA srcdata;
int remaining; // number of input samples in SRC buffer
__attribute__((__aligned__(16))) char in_fbuffer[sizeof(float)*SRC_BUFFER*SRC_MAX_CHANNELS];
// __attribute__((__aligned__(16))) float out_fbuffer[SRC_BUFFER*SRC_MAX_CHANNELS];
uintptr_t mutex;
} ddb_src_libsamplerate_t;
DB_dsp_instance_t* ddb_src_open (const char *id) {
ddb_src_libsamplerate_t *src = malloc (sizeof (ddb_src_libsamplerate_t));
DDB_INIT_DSP_INSTANCE (src,ddb_src_libsamplerate_t);
src->mutex = deadbeef->mutex_create ();
char var[20];
snprintf (var, sizeof (var), "%s.quality");
src->quality = deadbeef->conf_get_int (var, 2);
src->src = src_new (src->quality, 2, NULL);
if (!src->src) {
plugin.dsp.close ((DB_dsp_instance_t *)src);
return NULL;
}
return (DB_dsp_instance_t *)src;
}
void
ddb_src_close (DB_dsp_instance_t *_src) {
ddb_src_libsamplerate_t *src = (ddb_src_libsamplerate_t*)_src;
if (src->mutex) {
deadbeef->mutex_free (src->mutex);
src->mutex = 0;
}
if (src->src) {
src_delete (src->src);
src->src = NULL;
}
free (src);
}
void
ddb_src_lock (DB_dsp_instance_t *_src) {
ddb_src_libsamplerate_t *src = (ddb_src_libsamplerate_t*)_src;
deadbeef->mutex_lock (src->mutex);
}
void
ddb_src_unlock (DB_dsp_instance_t *_src) {
ddb_src_libsamplerate_t *src = (ddb_src_libsamplerate_t*)_src;
deadbeef->mutex_unlock (src->mutex);
}
void
ddb_src_reset (DB_dsp_instance_t *_src, int full) {
ddb_src_libsamplerate_t *src = (ddb_src_libsamplerate_t*)_src;
src->remaining = 0;
if (full) {
char var[20];
snprintf (var, sizeof (var), "%s.quality");
int q = deadbeef->conf_get_int (var, 2);
if (q != src->quality && q >= SRC_SINC_BEST_QUALITY && q <= SRC_LINEAR) {
ddb_src_lock (_src);
trace ("changing src->quality from %d to %d\n", src->quality, q);
src->quality = q;
if (src) {
src_delete (src->src);
src->src = NULL;
}
memset (&src->srcdata, 0, sizeof (src->srcdata));
src->src = src_new (src->quality, 2, NULL);
ddb_src_unlock (_src);
}
else {
src_reset (src->src);
}
}
}
void
ddb_src_set_ratio (DB_dsp_instance_t *_src, float ratio) {
ddb_src_libsamplerate_t *src = (ddb_src_libsamplerate_t*)_src;
src->srcdata.src_ratio = ratio;
src_set_ratio (src->src, ratio);
}
int
//ddb_src_process (DB_dsp_instance_t *_src, const char * restrict input, int nframes, char * restrict output, int buffersize, float ratio, int nchannels) {
ddb_src_process (DB_dsp_instance_t *_src, float *samples, int nframes, int nchannels) {
ddb_src_libsamplerate_t *src = (ddb_src_libsamplerate_t*)_src;
int numoutframes = nframes * src->srcdata.src_ratio;
float outbuf[numoutframes*nchannels];
int buffersize = sizeof (outbuf);
char *output = outbuf;
float *input = samples;
int inputsize = numoutframes;
int samplesize = nchannels * sizeof (float);
do {
// add more frames to input SRC buffer
int n = nframes;
if (n >= SRC_BUFFER - src->remaining) {
n = SRC_BUFFER - src->remaining;
}
if (n > 0) {
memcpy (&src->in_fbuffer[src->remaining*samplesize], samples, n * samplesize);
src->remaining += n;
samples += n * nchannels;
nframes -= n;
}
if (!src->remaining) {
//trace ("WARNING: SRC input buffer starved\n");
break;
}
// call libsamplerate
src->srcdata.data_in = (float *)src->in_fbuffer;
src->srcdata.data_out = (float *)output;
src->srcdata.input_frames = src->remaining;
src->srcdata.output_frames = inputsize;
src->srcdata.end_of_input = 0;
ddb_src_lock (_src);
trace ("src input: %d, ratio %f, buffersize: %d\n", src->srcdata.input_frames, src->srcdata.src_ratio, buffersize);
int src_err = src_process (src->src, &src->srcdata);
trace ("src output: %d, used: %d\n", src->srcdata.output_frames_gen, src->srcdata.input_frames_used);
ddb_src_unlock (_src);
if (src_err) {
const char *err = src_strerror (src_err) ;
fprintf (stderr, "src_process error %s\n"
"srcdata.data_in=%p, srcdata.data_out=%p, srcdata.input_frames=%d, srcdata.output_frames=%d, srcdata.src_ratio=%f", err, src->srcdata.data_in, src->srcdata.data_out, (int)src->srcdata.input_frames, (int)src->srcdata.output_frames, src->srcdata.src_ratio);
exit (-1);
}
inputsize -= src->srcdata.output_frames_gen;
output += src->srcdata.output_frames_gen * samplesize;
// calculate how many unused input samples left
src->remaining -= src->srcdata.input_frames_used;
// copy spare samples for next update
if (src->remaining > 0 && src->srcdata.input_frames_used > 0) {
memmove (src->in_fbuffer, &src->in_fbuffer[src->srcdata.input_frames_used*samplesize], src->remaining * samplesize);
}
if (src->srcdata.output_frames_gen == 0) {
break;
}
} while (nframes > 0);
memcpy (input, outbuf, sizeof (outbuf));
//static FILE *out = NULL;
//if (!out) {
// out = fopen ("out.raw", "w+b");
//}
//fwrite (input, 1, numoutframes*sizeof(float)*nchannels, out);
return numoutframes;
}
ddb_dsp_src_t plugin = {
.dsp.plugin.api_vmajor = DB_API_VERSION_MAJOR,
.dsp.plugin.api_vminor = DB_API_VERSION_MINOR,
.dsp.open = ddb_src_open,
.dsp.close = ddb_src_close,
.dsp.process = ddb_src_process,
.dsp.plugin.version_major = 0,
.dsp.plugin.version_minor = 1,
.dsp.plugin.id = "dsp_src",
.dsp.plugin.name = "dsp_src",
.dsp.plugin.descr = "Samplerate converter using libsamplerate",
.dsp.plugin.author = "Alexey Yakovenko",
.dsp.plugin.email = "waker@users.sf.net",
.dsp.plugin.website = "http://deadbeef.sf.net",
.reset = ddb_src_reset,
.set_ratio = ddb_src_set_ratio,
};
DB_plugin_t *
dsp_libsrc_load (DB_functions_t *f) {
deadbeef = f;
return &plugin.dsp.plugin;
}
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