86 lines
2.2 KiB
C
86 lines
2.2 KiB
C
/*
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* Copyright (C) 2003-2012 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "pcm_dsd.h"
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#include "dsd2pcm/dsd2pcm.h"
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#include <glib.h>
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#include <string.h>
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void
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pcm_dsd_init(struct pcm_dsd *dsd)
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{
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pcm_buffer_init(&dsd->buffer);
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memset(dsd->dsd2pcm, 0, sizeof(dsd->dsd2pcm));
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}
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void
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pcm_dsd_deinit(struct pcm_dsd *dsd)
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{
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pcm_buffer_deinit(&dsd->buffer);
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for (unsigned i = 0; i < G_N_ELEMENTS(dsd->dsd2pcm); ++i)
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if (dsd->dsd2pcm[i] != NULL)
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dsd2pcm_destroy(dsd->dsd2pcm[i]);
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}
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void
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pcm_dsd_reset(struct pcm_dsd *dsd)
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{
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for (unsigned i = 0; i < G_N_ELEMENTS(dsd->dsd2pcm); ++i)
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if (dsd->dsd2pcm[i] != NULL)
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dsd2pcm_reset(dsd->dsd2pcm[i]);
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}
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const float *
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pcm_dsd_to_float(struct pcm_dsd *dsd, unsigned channels, bool lsbfirst,
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const uint8_t *src, size_t src_size,
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size_t *dest_size_r)
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{
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assert(dsd != NULL);
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assert(src != NULL);
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assert(src_size > 0);
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assert(src_size % channels == 0);
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assert(channels <= G_N_ELEMENTS(dsd->dsd2pcm));
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const unsigned num_samples = src_size;
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const unsigned num_frames = src_size / channels;
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float *dest;
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const size_t dest_size = num_samples * sizeof(*dest);
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*dest_size_r = dest_size;
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dest = pcm_buffer_get(&dsd->buffer, dest_size);
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for (unsigned c = 0; c < channels; ++c) {
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if (dsd->dsd2pcm[c] == NULL) {
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dsd->dsd2pcm[c] = dsd2pcm_init();
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if (dsd->dsd2pcm[c] == NULL)
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return NULL;
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}
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dsd2pcm_translate(dsd->dsd2pcm[c], num_frames,
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src + c, channels,
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lsbfirst, dest + c, channels);
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}
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return dest;
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}
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