/*
* Copyright (C) 2003-2010 The Music Player Daemon Project
* http://www.musicpd.org
*
* 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 "config.h"
#include "pcm_format.h"
#include "pcm_dither.h"
#include "pcm_buffer.h"
#include "pcm_pack.h"
static void
pcm_convert_8_to_16(int16_t *out, const int8_t *in,
unsigned num_samples)
{
while (num_samples > 0) {
*out++ = *in++ << 8;
--num_samples;
}
}
static void
pcm_convert_24_to_16(struct pcm_dither *dither,
int16_t *out, const int32_t *in,
unsigned num_samples)
{
pcm_dither_24_to_16(dither, out, in, num_samples);
}
static void
pcm_convert_32_to_16(struct pcm_dither *dither,
int16_t *out, const int32_t *in,
unsigned num_samples)
{
pcm_dither_32_to_16(dither, out, in, num_samples);
}
static int32_t *
pcm_convert_24_to_24p32(struct pcm_buffer *buffer, const uint8_t *src,
unsigned num_samples)
{
int32_t *dest = pcm_buffer_get(buffer, num_samples * 4);
pcm_unpack_24(dest, src, num_samples, false);
return dest;
}
const int16_t *
pcm_convert_to_16(struct pcm_buffer *buffer, struct pcm_dither *dither,
enum sample_format src_format, const void *src,
size_t src_size, size_t *dest_size_r)
{
unsigned num_samples;
int16_t *dest;
int32_t *dest32;
switch (src_format) {
case SAMPLE_FORMAT_UNDEFINED:
break;
case SAMPLE_FORMAT_S8:
num_samples = src_size;
*dest_size_r = src_size * sizeof(*dest);
dest = pcm_buffer_get(buffer, *dest_size_r);
pcm_convert_8_to_16(dest,
(const int8_t *)src,
num_samples);
return dest;
case SAMPLE_FORMAT_S16:
*dest_size_r = src_size;
return src;
case SAMPLE_FORMAT_S24:
/* convert to S24_P32 first */
num_samples = src_size / 3;
dest32 = pcm_convert_24_to_24p32(buffer, src, num_samples);
dest = (int16_t *)dest32;
/* convert to 16 bit in-place */
*dest_size_r = num_samples * sizeof(*dest);
pcm_convert_24_to_16(dither, dest, dest32,
num_samples);
return dest;
case SAMPLE_FORMAT_S24_P32:
num_samples = src_size / 4;
*dest_size_r = num_samples * sizeof(*dest);
dest = pcm_buffer_get(buffer, *dest_size_r);
pcm_convert_24_to_16(dither, dest,
(const int32_t *)src,
num_samples);
return dest;
case SAMPLE_FORMAT_S32:
num_samples = src_size / 4;
*dest_size_r = num_samples * sizeof(*dest);
dest = pcm_buffer_get(buffer, *dest_size_r);
pcm_convert_32_to_16(dither, dest,
(const int32_t *)src,
num_samples);
return dest;
}
return NULL;
}
static void
pcm_convert_8_to_24(int32_t *out, const int8_t *in,
unsigned num_samples)
{
while (num_samples > 0) {
*out++ = *in++ << 16;
--num_samples;
}
}
static void
pcm_convert_16_to_24(int32_t *out, const int16_t *in,
unsigned num_samples)
{
while (num_samples > 0) {
*out++ = *in++ << 8;
--num_samples;
}
}
static void
pcm_convert_32_to_24(int32_t *out, const int16_t *in,
unsigned num_samples)
{
while (num_samples > 0) {
*out++ = *in++ >> 8;
--num_samples;
}
}
const int32_t *
pcm_convert_to_24(struct pcm_buffer *buffer,
enum sample_format src_format, const void *src,
size_t src_size, size_t *dest_size_r)
{
unsigned num_samples;
int32_t *dest;
switch (src_format) {
case SAMPLE_FORMAT_UNDEFINED:
break;
case SAMPLE_FORMAT_S8:
num_samples = src_size;
*dest_size_r = src_size * sizeof(*dest);
dest = pcm_buffer_get(buffer, *dest_size_r);
pcm_convert_8_to_24(dest, (const int8_t *)src,
num_samples);
return dest;
case SAMPLE_FORMAT_S16:
num_samples = src_size / 2;
*dest_size_r = num_samples * sizeof(*dest);
dest = pcm_buffer_get(buffer, *dest_size_r);
pcm_convert_16_to_24(dest, (const int16_t *)src,
num_samples);
return dest;
case SAMPLE_FORMAT_S24:
num_samples = src_size / 3;
*dest_size_r = num_samples * sizeof(*dest);
return pcm_convert_24_to_24p32(buffer, src, num_samples);
case SAMPLE_FORMAT_S24_P32:
*dest_size_r = src_size;
return src;
case SAMPLE_FORMAT_S32:
num_samples = src_size / 4;
*dest_size_r = num_samples * sizeof(*dest);
dest = pcm_buffer_get(buffer, *dest_size_r);
pcm_convert_32_to_24(dest, (const int16_t *)src,
num_samples);
return dest;
}
return NULL;
}
static void
pcm_convert_8_to_32(int32_t *out, const int8_t *in,
unsigned num_samples)
{
while (num_samples > 0) {
*out++ = *in++ << 24;
--num_samples;
}
}
static void
pcm_convert_16_to_32(int32_t *out, const int16_t *in,
unsigned num_samples)
{
while (num_samples > 0) {
*out++ = *in++ << 16;
--num_samples;
}
}
static void
pcm_convert_24_to_32(int32_t *out, const int32_t *in,
unsigned num_samples)
{
while (num_samples > 0) {
*out++ = *in++ << 8;
--num_samples;
}
}
const int32_t *
pcm_convert_to_32(struct pcm_buffer *buffer,
enum sample_format src_format, const void *src,
size_t src_size, size_t *dest_size_r)
{
unsigned num_samples;
int32_t *dest;
switch (src_format) {
case SAMPLE_FORMAT_UNDEFINED:
break;
case SAMPLE_FORMAT_S8:
num_samples = src_size;
*dest_size_r = src_size * sizeof(*dest);
dest = pcm_buffer_get(buffer, *dest_size_r);
pcm_convert_8_to_32(dest, (const int8_t *)src,
num_samples);
return dest;
case SAMPLE_FORMAT_S16:
num_samples = src_size / 2;
*dest_size_r = num_samples * sizeof(*dest);
dest = pcm_buffer_get(buffer, *dest_size_r);
pcm_convert_16_to_32(dest, (const int16_t *)src,
num_samples);
return dest;
case SAMPLE_FORMAT_S24:
/* convert to S24_P32 first */
num_samples = src_size / 3;
dest = pcm_convert_24_to_24p32(buffer, src, num_samples);
/* convert to 32 bit in-place */
*dest_size_r = num_samples * sizeof(*dest);
pcm_convert_24_to_32(dest, dest, num_samples);
return dest;
case SAMPLE_FORMAT_S24_P32:
num_samples = src_size / 4;
*dest_size_r = num_samples * sizeof(*dest);
dest = pcm_buffer_get(buffer, *dest_size_r);
pcm_convert_24_to_32(dest, (const int32_t *)src,
num_samples);
return dest;
case SAMPLE_FORMAT_S32:
*dest_size_r = src_size;
return src;
}
return NULL;
}
