1 files changed, 327 insertions, 0 deletions
diff --git a/src/io/source_sndfile.c b/src/io/source_sndfile.c
new file mode 100644
index 0000000..5c8d5a5
--- /dev/null
+++ b/src/io/source_sndfile.c
@@ -0,0 +1,327 @@
+/*
+  Copyright (C) 2012 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 "config.h"
+
+#ifdef HAVE_SNDFILE
+
+#include <sndfile.h>
+
+#include "aubio_priv.h"
+#include "fvec.h"
+#include "fmat.h"
+#include "source_sndfile.h"
+
+#include "temporal/resampler.h"
+
+#define MAX_CHANNELS 6
+#define MAX_SIZE 4096
+#define MAX_SAMPLES MAX_CHANNELS * MAX_SIZE
+
+#if !HAVE_AUBIO_DOUBLE
+#define aubio_sf_read_smpl sf_read_float
+#else /* HAVE_AUBIO_DOUBLE */
+#define aubio_sf_read_smpl sf_read_double
+#endif /* HAVE_AUBIO_DOUBLE */
+
+struct _aubio_source_sndfile_t {
+  uint_t hop_size;
+  uint_t samplerate;
+  uint_t channels;
+
+  // some data about the file
+  char_t *path;
+  SNDFILE *handle;
+  int input_samplerate;
+  int input_channels;
+  int input_format;
+  int duration;
+
+  // resampling stuff
+  smpl_t ratio;
+  uint_t input_hop_size;
+#ifdef HAVE_SAMPLERATE
+  aubio_resampler_t *resampler;
+  fvec_t *input_data;
+#endif /* HAVE_SAMPLERATE */
+
+  // some temporary memory for sndfile to write at
+  uint_t scratch_size;
+  smpl_t *scratch_data;
+};
+
+aubio_source_sndfile_t * new_aubio_source_sndfile(const char_t * path, uint_t samplerate, uint_t hop_size) {
+  aubio_source_sndfile_t * s = AUBIO_NEW(aubio_source_sndfile_t);
+  SF_INFO sfinfo;
+
+  if (path == NULL) {
+    AUBIO_ERR("source_sndfile: Aborted opening null path\n");
+    goto beach;
+  }
+  if ((sint_t)samplerate < 0) {
+    AUBIO_ERR("source_sndfile: Can not open %s with samplerate %d\n", path, samplerate);
+    goto beach;
+  }
+  if ((sint_t)hop_size <= 0) {
+    AUBIO_ERR("source_sndfile: Can not open %s with hop_size %d\n", path, hop_size);
+    goto beach;
+  }
+
+  s->hop_size = hop_size;
+  s->channels = 1;
+
+  if (s->path) AUBIO_FREE(s->path);
+  s->path = AUBIO_ARRAY(char_t, strnlen(path, PATH_MAX) + 1);
+  strncpy(s->path, path, strnlen(path, PATH_MAX) + 1);
+
+  // try opening the file, getting the info in sfinfo
+  AUBIO_MEMSET(&sfinfo, 0, sizeof (sfinfo));
+  s->handle = sf_open (s->path, SFM_READ, &sfinfo);
+
+  if (s->handle == NULL) {
+    /* show libsndfile err msg */
+    AUBIO_ERR("source_sndfile: Failed opening %s: %s\n", s->path, sf_strerror (NULL));
+    goto beach;
+  }
+
+  /* get input specs */
+  s->input_samplerate = sfinfo.samplerate;
+  s->input_channels   = sfinfo.channels;
+  s->input_format     = sfinfo.format;
+  s->duration         = sfinfo.frames;
+
+  if (samplerate == 0) {
+    s->samplerate = s->input_samplerate;
+    //AUBIO_DBG("sampling rate set to 0, automagically adjusting to %d\n", samplerate);
+  } else {
+    s->samplerate = samplerate;
+  }
+  /* compute input block size required before resampling */
+  s->ratio = s->samplerate/(smpl_t)s->input_samplerate;
+  s->input_hop_size = (uint_t)FLOOR(s->hop_size / s->ratio + .5);
+
+  if (s->input_hop_size * s->input_channels > MAX_SAMPLES) {
+    AUBIO_ERR("source_sndfile: Not able to process more than %d frames of %d channels\n",
+        MAX_SAMPLES / s->input_channels, s->input_channels);
+    goto beach;
+  }
+
+#ifdef HAVE_SAMPLERATE
+  s->resampler = NULL;
+  s->input_data = NULL;
+  if (s->ratio != 1) {
+    s->input_data = new_fvec(s->input_hop_size);
+    s->resampler = new_aubio_resampler(s->ratio, 4);
+    if (s->ratio > 1) {
+      // we would need to add a ring buffer for these
+      if ( (uint_t)(s->input_hop_size * s->ratio + .5)  != s->hop_size ) {
+        AUBIO_ERR("source_sndfile: can not upsample %s from %d to %d\n", s->path,
+            s->input_samplerate, s->samplerate);
+        goto beach;
+      }
+      AUBIO_WRN("source_sndfile: upsampling %s from %d to %d\n", s->path,
+          s->input_samplerate, s->samplerate);
+    }
+    s->duration = (uint_t)FLOOR(s->duration * s->ratio);
+  }
+#else
+  if (s->ratio != 1) {
+    AUBIO_ERR("source_sndfile: aubio was compiled without aubio_resampler\n");
+    goto beach;
+  }
+#endif /* HAVE_SAMPLERATE */
+
+  /* allocate data for de/interleaving reallocated when needed. */
+  s->scratch_size = s->input_hop_size * s->input_channels;
+  s->scratch_data = AUBIO_ARRAY(smpl_t, s->scratch_size);
+
+  return s;
+
+beach:
+  //AUBIO_ERR("can not read %s at samplerate %dHz with a hop_size of %d\n",
+  //    s->path, s->samplerate, s->hop_size);
+  del_aubio_source_sndfile(s);
+  return NULL;
+}
+
+void aubio_source_sndfile_do(aubio_source_sndfile_t * s, fvec_t * read_data, uint_t * read){
+  uint_t i,j, input_channels = s->input_channels;
+  /* read from file into scratch_data */
+  sf_count_t read_samples = aubio_sf_read_smpl (s->handle, s->scratch_data, s->scratch_size);
+
+  /* where to store de-interleaved data */
+  smpl_t *ptr_data;
+#ifdef HAVE_SAMPLERATE
+  if (s->ratio != 1) {
+    ptr_data = s->input_data->data;
+  } else
+#endif /* HAVE_SAMPLERATE */
+  {
+    ptr_data = read_data->data;
+  }
+
+  /* de-interleaving and down-mixing data  */
+  for (j = 0; j < read_samples / input_channels; j++) {
+    ptr_data[j] = 0;
+    for (i = 0; i < input_channels; i++) {
+      ptr_data[j] += s->scratch_data[input_channels*j+i];
+    }
+    ptr_data[j] /= (smpl_t)input_channels;
+  }
+
+#ifdef HAVE_SAMPLERATE
+  if (s->resampler) {
+    aubio_resampler_do(s->resampler, s->input_data, read_data);
+  }
+#endif /* HAVE_SAMPLERATE */
+
+  *read = (int)FLOOR(s->ratio * read_samples / input_channels + .5);
+
+  if (*read < s->hop_size) {
+    for (j = *read; j < s->hop_size; j++) {
+      read_data->data[j] = 0;
+    }
+  }
+
+}
+
+void aubio_source_sndfile_do_multi(aubio_source_sndfile_t * s, fmat_t * read_data, uint_t * read){
+  uint_t i,j, input_channels = s->input_channels;
+  /* do actual reading */
+  sf_count_t read_samples = aubio_sf_read_smpl (s->handle, s->scratch_data, s->scratch_size);
+
+  /* where to store de-interleaved data */
+  smpl_t **ptr_data;
+#ifdef HAVE_SAMPLERATE
+  if (s->ratio != 1) {
+    AUBIO_ERR("source_sndfile: no multi channel resampling yet\n");
+    return;
+    //ptr_data = s->input_data->data;
+  } else
+#endif /* HAVE_SAMPLERATE */
+  {
+    ptr_data = read_data->data;
+  }
+
+  if (read_data->height < input_channels) {
+    // destination matrix has less channels than the file; copy only first
+    // channels of the file, de-interleaving data
+    for (j = 0; j < read_samples / input_channels; j++) {
+      for (i = 0; i < read_data->height; i++) {
+        ptr_data[i][j] = s->scratch_data[j * input_channels + i];
+      }
+    }
+  } else {
+    // destination matrix has as many or more channels than the file; copy each
+    // channel from the file to the destination matrix, de-interleaving data
+    for (j = 0; j < read_samples / input_channels; j++) {
+      for (i = 0; i < input_channels; i++) {
+        ptr_data[i][j] = s->scratch_data[j * input_channels + i];
+      }
+    }
+  }
+
+  if (read_data->height > input_channels) {
+    // destination matrix has more channels than the file; copy last channel
+    // of the file to each additional channels, de-interleaving data
+    for (j = 0; j < read_samples / input_channels; j++) {
+      for (i = input_channels; i < read_data->height; i++) {
+        ptr_data[i][j] = s->scratch_data[j * input_channels + (input_channels - 1)];
+      }
+    }
+  }
+
+#ifdef HAVE_SAMPLERATE
+  if (s->resampler) {
+    //aubio_resampler_do(s->resampler, s->input_data, read_data);
+  }
+#endif /* HAVE_SAMPLERATE */
+
+  *read = (int)FLOOR(s->ratio * read_samples / input_channels + .5);
+
+  if (*read < s->hop_size) {
+    for (i = 0; i < read_data->height; i++) {
+      for (j = *read; j < s->hop_size; j++) {
+        read_data->data[i][j] = 0.;
+      }
+    }
+  }
+
+}
+
+uint_t aubio_source_sndfile_get_samplerate(aubio_source_sndfile_t * s) {
+  return s->samplerate;
+}
+
+uint_t aubio_source_sndfile_get_channels(aubio_source_sndfile_t * s) {
+  return s->input_channels;
+}
+
+uint_t aubio_source_sndfile_get_duration (const aubio_source_sndfile_t * s) {
+  if (s && s->duration) {
+    return s->duration;
+  }
+  return 0;
+}
+
+uint_t aubio_source_sndfile_seek (aubio_source_sndfile_t * s, uint_t pos) {
+  uint_t resampled_pos = (uint_t)ROUND(pos / s->ratio);
+  sf_count_t sf_ret = sf_seek (s->handle, resampled_pos, SEEK_SET);
+  if (sf_ret == -1) {
+    AUBIO_ERR("source_sndfile: Failed seeking %s at %d: %s\n", s->path, pos, sf_strerror (NULL));
+    return AUBIO_FAIL;
+  }
+  if (sf_ret != resampled_pos) {
+    AUBIO_ERR("source_sndfile: Tried seeking %s at %d, but got %d: %s\n",
+        s->path, resampled_pos, (uint_t)sf_ret, sf_strerror (NULL));
+    return AUBIO_FAIL;
+  }
+  return AUBIO_OK;
+}
+
+uint_t aubio_source_sndfile_close (aubio_source_sndfile_t *s) {
+  if (!s->handle) {
+    return AUBIO_FAIL;
+  }
+  if(sf_close(s->handle)) {
+    AUBIO_ERR("source_sndfile: Error closing file %s: %s\n", s->path, sf_strerror (NULL));
+    return AUBIO_FAIL;
+  }
+  return AUBIO_OK;
+}
+
+void del_aubio_source_sndfile(aubio_source_sndfile_t * s){
+  if (!s) return;
+  aubio_source_sndfile_close(s);
+#ifdef HAVE_SAMPLERATE
+  if (s->resampler != NULL) {
+    del_aubio_resampler(s->resampler);
+  }
+  if (s->input_data) {
+    del_fvec(s->input_data);
+  }
+#endif /* HAVE_SAMPLERATE */
+  if (s->path) AUBIO_FREE(s->path);
+  AUBIO_FREE(s->scratch_data);
+  AUBIO_FREE(s);
+}
+
+#endif /* HAVE_SNDFILE */