91 lines
2.2 KiB
C
91 lines
2.2 KiB
C
/*
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* Copyright (C) 2003-2011 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_byteswap.h"
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#include "pcm_buffer.h"
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#include <glib.h>
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#include <assert.h>
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#undef G_LOG_DOMAIN
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#define G_LOG_DOMAIN "pcm"
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const int16_t *pcm_byteswap_16(struct pcm_buffer *buffer,
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const int16_t *src, size_t len)
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{
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int16_t *buf = pcm_buffer_get(buffer, len);
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assert(buf != NULL);
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const int16_t *src_end = src + len / sizeof(*src);
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int16_t *dest = buf;
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while (src < src_end) {
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const int16_t x = *src++;
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*dest++ = GUINT16_SWAP_LE_BE(x);
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}
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return buf;
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}
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const int32_t *pcm_byteswap_32(struct pcm_buffer *buffer,
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const int32_t *src, size_t len)
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{
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int32_t *buf = pcm_buffer_get(buffer, len);
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assert(buf != NULL);
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const int32_t *src_end = src + len / sizeof(*src);
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int32_t *dest = buf;
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while (src < src_end) {
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const int32_t x = *src++;
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*dest++ = GUINT32_SWAP_LE_BE(x);
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}
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return buf;
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}
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const void *
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pcm_byteswap(struct pcm_buffer *buffer, enum sample_format format,
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const void *src, size_t size)
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{
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switch (format) {
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case SAMPLE_FORMAT_UNDEFINED:
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case SAMPLE_FORMAT_S24:
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case SAMPLE_FORMAT_FLOAT:
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/* not implemented */
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return NULL;
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case SAMPLE_FORMAT_S8:
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return src;
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case SAMPLE_FORMAT_S16:
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return pcm_byteswap_16(buffer, src, size);
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case SAMPLE_FORMAT_S24_P32:
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case SAMPLE_FORMAT_S32:
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return pcm_byteswap_32(buffer, src, size);
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}
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/* unreachable */
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assert(false);
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return NULL;
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}
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