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Abramo Bagnara <abramo@alsa-project.org>

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Sat, 11 Dec 1999 08:45:24 +0100
- changed lowlevel drivers to use pcm_misc.c functions
- fixed some bugs in pcm_plugin_build
- the plugin code is shared between alsa-lib and alsa-driver
This commit is contained in:
Jaroslav Kysela 1999-12-11 11:46:05 +00:00
parent 0f0ce09509
commit 20ebae20a7
13 changed files with 596 additions and 508 deletions
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17
src/pcm/plugin/mulaw.c
View file

@ -21,6 +21,11 @@
*
*/
#ifdef __KERNEL__
#include "../../include/driver.h"
#include "../../include/pcm_plugin.h"
#define bswap_16(x) __swab16((x))
#else
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
@ -29,6 +34,7 @@
#include <endian.h>
#include <byteswap.h>
#include "../pcm_local.h"
#endif
#define SIGN_BIT (0x80) /* Sign bit for a u-law byte. */
#define QUANT_MASK (0xf) /* Quantization field mask. */
@ -241,8 +247,8 @@ static void mulaw_conv_mulaw_swap_u16bit(unsigned char *src_ptr, unsigned short
}
static ssize_t mulaw_transfer(snd_pcm_plugin_t *plugin,
char *src_ptr, size_t src_size,
char *dst_ptr, size_t dst_size)
char *src_ptr, size_t src_size,
char *dst_ptr, size_t dst_size)
{
struct mulaw_private_data *data;
@ -436,7 +442,8 @@ int snd_pcm_plugin_build_mulaw(snd_pcm_format_t *src_format,
return -EINVAL;
*r_plugin = NULL;
if (src_format->interleave != dst_format->interleave)
if (src_format->interleave != dst_format->interleave &&
src_format->voices > 1)
return -EINVAL;
if (src_format->rate != dst_format->rate)
return -EINVAL;
@ -480,3 +487,7 @@ int snd_pcm_plugin_build_mulaw(snd_pcm_format_t *src_format,
*r_plugin = plugin;
return 0;
}
#ifdef __KERNEL__
EXPORT_SYMBOL(snd_pcm_plugin_build_mulaw);
#endif