mirror of
https://github.com/alsa-project/alsa-lib.git
synced 2025-11-03 09:01:52 -05:00
Abramo Bagnara <abramo@alsa-project.org>
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
parent
0f0ce09509
commit
20ebae20a7
13 changed files with 596 additions and 508 deletions
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@ -18,7 +18,12 @@
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#ifdef __KERNEL__
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#include "../../include/driver.h"
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#include "../../include/pcm.h"
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#include "../../include/pcm_plugin.h"
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#else
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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@ -27,6 +32,7 @@
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#include <endian.h>
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#include <byteswap.h>
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#include "../pcm_local.h"
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#endif
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/*
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* Basic linear conversion plugin
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@ -48,14 +54,15 @@ typedef enum {
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} combination_t;
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typedef enum {
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NONE,
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SOURCE,
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DESTINATION,
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BOTH,
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SIGN_NONE,
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SIGN_SOURCE,
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SIGN_DESTINATION,
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SIGN_BOTH,
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NONE = 0,
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SOURCE = 1,
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DESTINATION = 2,
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BOTH = 3,
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SIGN = 4,
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SIGN_NONE = 4,
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SIGN_SOURCE = 5,
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SIGN_DESTINATION = 6,
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SIGN_BOTH = 7,
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} endian_t;
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struct linear_private_data {
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@ -128,8 +135,8 @@ static void linear_conv_sign_16bit_8bit_swap(unsigned short *src_ptr,
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}
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static ssize_t linear_transfer(snd_pcm_plugin_t *plugin,
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char *src_ptr, size_t src_size,
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char *dst_ptr, size_t dst_size)
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char *src_ptr, size_t src_size,
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char *dst_ptr, size_t dst_size)
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{
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struct linear_private_data *data;
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@ -170,13 +177,13 @@ static ssize_t linear_transfer(snd_pcm_plugin_t *plugin,
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case NONE:
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linear_conv_16bit_8bit((short *)src_ptr, dst_ptr, src_size);
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break;
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case DESTINATION:
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case SOURCE:
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linear_conv_16bit_8bit_swap((short *)src_ptr, dst_ptr, src_size);
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break;
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case SIGN_NONE:
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linear_conv_sign_16bit_8bit((short *)src_ptr, dst_ptr, src_size);
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break;
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case SIGN_DESTINATION:
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case SIGN_SOURCE:
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linear_conv_sign_16bit_8bit_swap((short *)src_ptr, dst_ptr, src_size);
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break;
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default:
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@ -248,68 +255,6 @@ static ssize_t linear_dst_size(snd_pcm_plugin_t *plugin, size_t size)
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}
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}
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static int linear_wide(int format)
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{
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if (format >= 0 && format <= 1)
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return 8;
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if (format >= 2 && format <= 5)
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return 16;
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if (format >= 6 && format <= 9)
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return 24;
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if (format >= 10 && format <= 13)
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return 32;
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return -1;
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}
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static int linear_endian(int format)
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{
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switch (format) {
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case SND_PCM_SFMT_S8:
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case SND_PCM_SFMT_U8:
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return 0;
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case SND_PCM_SFMT_S16_LE:
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case SND_PCM_SFMT_U16_LE:
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case SND_PCM_SFMT_S24_LE:
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case SND_PCM_SFMT_U24_LE:
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case SND_PCM_SFMT_S32_LE:
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case SND_PCM_SFMT_U32_LE:
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return __LITTLE_ENDIAN;
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case SND_PCM_SFMT_S16_BE:
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case SND_PCM_SFMT_U16_BE:
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case SND_PCM_SFMT_S24_BE:
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case SND_PCM_SFMT_U24_BE:
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case SND_PCM_SFMT_S32_BE:
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case SND_PCM_SFMT_U32_BE:
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return __BIG_ENDIAN;
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default:
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return -1;
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}
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}
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static int linear_sign(int format)
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{
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switch (format) {
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case SND_PCM_SFMT_S8:
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case SND_PCM_SFMT_S16_LE:
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case SND_PCM_SFMT_S16_BE:
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case SND_PCM_SFMT_S24_LE:
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case SND_PCM_SFMT_S24_BE:
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case SND_PCM_SFMT_S32_LE:
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case SND_PCM_SFMT_S32_BE:
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return 1;
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case SND_PCM_SFMT_U8:
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case SND_PCM_SFMT_U16_LE:
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case SND_PCM_SFMT_U24_LE:
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case SND_PCM_SFMT_U32_LE:
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case SND_PCM_SFMT_U16_BE:
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case SND_PCM_SFMT_U24_BE:
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case SND_PCM_SFMT_U32_BE:
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return 0;
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default:
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return -1;
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}
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}
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int snd_pcm_plugin_build_linear(snd_pcm_format_t *src_format,
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snd_pcm_format_t *dst_format,
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snd_pcm_plugin_t **r_plugin)
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@ -317,40 +262,40 @@ int snd_pcm_plugin_build_linear(snd_pcm_format_t *src_format,
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struct linear_private_data *data;
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snd_pcm_plugin_t *plugin;
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combination_t cmd;
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int wide1, wide2, endian1, endian2, sign1, sign2;
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int width1, width2, endian1, endian2, sign1, sign2;
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if (!r_plugin)
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return -EINVAL;
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*r_plugin = NULL;
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if (src_format->interleave != dst_format->interleave)
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if (src_format->interleave != dst_format->interleave &&
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src_format->voices > 1)
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return -EINVAL;
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if (src_format->rate != dst_format->rate)
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return -EINVAL;
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if (src_format->voices != dst_format->voices)
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return -EINVAL;
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wide1 = linear_wide(src_format->format);
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endian1 = linear_endian(src_format->format);
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sign1 = linear_sign(src_format->format);
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wide2 = linear_wide(dst_format->format);
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endian2 = linear_endian(dst_format->format);
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sign2 = linear_sign(dst_format->format);
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if (wide1 < 0 || wide2 < 0 || endian1 < 0 || endian2 < 0 || sign1 < 0 || sign2 < 0)
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if (!(snd_pcm_format_linear(src_format->format) &&
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snd_pcm_format_linear(dst_format->format)))
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return -EINVAL;
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width1 = snd_pcm_format_width(src_format->format);
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sign1 = snd_pcm_format_signed(src_format->format);
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width2 = snd_pcm_format_width(dst_format->format);
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sign2 = snd_pcm_format_signed(dst_format->format);
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#if __BYTE_ORDER == __LITTLE_ENDIAN
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endian1 = endian1 == __BIG_ENDIAN ? 1 : 0;
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endian2 = endian2 == __BIG_ENDIAN ? 1 : 0;
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endian1 = snd_pcm_format_little_endian(src_format->format);
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endian2 = snd_pcm_format_little_endian(dst_format->format);
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#elif __BYTE_ORDER == __BIG_ENDIAN
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endian1 = endian1 == __LITTLE_ENDIAN ? 1 : 0;
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endian2 = endian2 == __LITTLE_ENDIAN ? 1 : 0;
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endian1 = snd_pcm_format_big_endian(src_format->format);
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endian2 = snd_pcm_format_big_endian(dst_format->format);
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#else
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#error "Unsupported endian..."
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#endif
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cmd = _8BIT_16BIT;
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switch (wide1) {
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switch (width1) {
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case 8:
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switch (wide2) {
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switch (width2) {
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case 16: cmd = _8BIT_16BIT; break;
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case 24: cmd = _8BIT_24BIT; break;
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case 32: cmd = _8BIT_32BIT; break;
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@ -358,7 +303,7 @@ int snd_pcm_plugin_build_linear(snd_pcm_format_t *src_format,
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}
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break;
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case 16:
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switch (wide2) {
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switch (width2) {
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case 8: cmd = _16BIT_8BIT; break;
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case 24: cmd = _16BIT_24BIT; break;
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case 32: cmd = _16BIT_32BIT; break;
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@ -366,7 +311,7 @@ int snd_pcm_plugin_build_linear(snd_pcm_format_t *src_format,
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}
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break;
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case 24:
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switch (wide2) {
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switch (width2) {
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case 8: cmd = _24BIT_8BIT; break;
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case 16: cmd = _24BIT_16BIT; break;
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case 32: cmd = _24BIT_32BIT; break;
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@ -374,7 +319,7 @@ int snd_pcm_plugin_build_linear(snd_pcm_format_t *src_format,
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}
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break;
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case 32:
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switch (wide2) {
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switch (width2) {
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case 8: cmd = _32BIT_8BIT; break;
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case 16: cmd = _32BIT_16BIT; break;
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case 24: cmd = _32BIT_24BIT; break;
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@ -390,20 +335,20 @@ int snd_pcm_plugin_build_linear(snd_pcm_format_t *src_format,
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return -ENOMEM;
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data = (struct linear_private_data *)snd_pcm_plugin_extra_data(plugin);
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data->cmd = cmd;
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if (!endian1 && !endian2) {
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data->endian = NONE;
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} else if (endian1 && !endian2) {
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data->endian = SOURCE;
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} else if (!endian1 && endian2) {
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data->endian = DESTINATION;
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} else {
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data->endian = BOTH;
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}
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data->endian = NONE;
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if (endian1 == 0)
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data->endian |= SOURCE;
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if (endian2 == 0)
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data->endian |= DESTINATION;
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if (sign1 != sign2)
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data->endian += 4;
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data->endian |= SIGN;
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plugin->transfer = linear_transfer;
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plugin->src_size = linear_src_size;
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plugin->dst_size = linear_dst_size;
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*r_plugin = plugin;
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return 0;
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}
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#ifdef __KERNEL__
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EXPORT_SYMBOL(snd_pcm_plugin_build_linear);
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#endif
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