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acrn-kernel/sound/core/oss/route.c

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/*
* Attenuated route Plug-In
* Copyright (c) 2000 by Abramo Bagnara <abramo@alsa-project.org>
*
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library 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 Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <sound/driver.h>
#include <linux/slab.h>
#include <linux/time.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include "pcm_plugin.h"
/* The best possible hack to support missing optimization in gcc 2.7.2.3 */
#if ROUTE_PLUGIN_RESOLUTION & (ROUTE_PLUGIN_RESOLUTION - 1) != 0
#define div(a) a /= ROUTE_PLUGIN_RESOLUTION
#elif ROUTE_PLUGIN_RESOLUTION == 16
#define div(a) a >>= 4
#else
#error "Add some code here"
#endif
typedef struct ttable_dst ttable_dst_t;
typedef struct route_private_data route_t;
typedef void (*route_channel_f)(snd_pcm_plugin_t *plugin,
const snd_pcm_plugin_channel_t *src_channels,
snd_pcm_plugin_channel_t *dst_channel,
ttable_dst_t* ttable, snd_pcm_uframes_t frames);
typedef struct {
int channel;
int as_int;
} ttable_src_t;
struct ttable_dst {
int att; /* Attenuated */
unsigned int nsrcs;
ttable_src_t* srcs;
route_channel_f func;
};
struct route_private_data {
enum {R_UINT32=0, R_UINT64=1} sum_type;
int get, put;
int conv;
int src_sample_size;
ttable_dst_t ttable[0];
};
typedef union {
u_int32_t as_uint32;
u_int64_t as_uint64;
} sum_t;
static void route_to_channel_from_zero(snd_pcm_plugin_t *plugin,
const snd_pcm_plugin_channel_t *src_channels ATTRIBUTE_UNUSED,
snd_pcm_plugin_channel_t *dst_channel,
ttable_dst_t* ttable ATTRIBUTE_UNUSED, snd_pcm_uframes_t frames)
{
if (dst_channel->wanted)
snd_pcm_area_silence(&dst_channel->area, 0, frames, plugin->dst_format.format);
dst_channel->enabled = 0;
}
static void route_to_channel_from_one(snd_pcm_plugin_t *plugin,
const snd_pcm_plugin_channel_t *src_channels,
snd_pcm_plugin_channel_t *dst_channel,
ttable_dst_t* ttable, snd_pcm_uframes_t frames)
{
#define CONV_LABELS
#include "plugin_ops.h"
#undef CONV_LABELS
route_t *data = (route_t *)plugin->extra_data;
void *conv;
const snd_pcm_plugin_channel_t *src_channel = NULL;
unsigned int srcidx;
char *src, *dst;
int src_step, dst_step;
for (srcidx = 0; srcidx < ttable->nsrcs; ++srcidx) {
src_channel = &src_channels[ttable->srcs[srcidx].channel];
if (src_channel->area.addr != NULL)
break;
}
if (srcidx == ttable->nsrcs) {
route_to_channel_from_zero(plugin, src_channels, dst_channel, ttable, frames);
return;
}
dst_channel->enabled = 1;
conv = conv_labels[data->conv];
src = src_channel->area.addr + src_channel->area.first / 8;
src_step = src_channel->area.step / 8;
dst = dst_channel->area.addr + dst_channel->area.first / 8;
dst_step = dst_channel->area.step / 8;
while (frames-- > 0) {
goto *conv;
#define CONV_END after
#include "plugin_ops.h"
#undef CONV_END
after:
src += src_step;
dst += dst_step;
}
}
static void route_to_channel(snd_pcm_plugin_t *plugin,
const snd_pcm_plugin_channel_t *src_channels,
snd_pcm_plugin_channel_t *dst_channel,
ttable_dst_t* ttable, snd_pcm_uframes_t frames)
{
#define GET_U_LABELS
#define PUT_U32_LABELS
#include "plugin_ops.h"
#undef GET_U_LABELS
#undef PUT_U32_LABELS
static void *zero_labels[2] = { &&zero_int32, &&zero_int64 };
/* sum_type att */
static void *add_labels[2 * 2] = { &&add_int32_noatt, &&add_int32_att,
&&add_int64_noatt, &&add_int64_att,
};
/* sum_type att shift */
static void *norm_labels[2 * 2 * 4] = { NULL,
&&norm_int32_8_noatt,
&&norm_int32_16_noatt,
&&norm_int32_24_noatt,
NULL,
&&norm_int32_8_att,
&&norm_int32_16_att,
&&norm_int32_24_att,
&&norm_int64_0_noatt,
&&norm_int64_8_noatt,
&&norm_int64_16_noatt,
&&norm_int64_24_noatt,
&&norm_int64_0_att,
&&norm_int64_8_att,
&&norm_int64_16_att,
&&norm_int64_24_att,
};
route_t *data = (route_t *)plugin->extra_data;
void *zero, *get, *add, *norm, *put_u32;
int nsrcs = ttable->nsrcs;
char *dst;
int dst_step;
char *srcs[nsrcs];
int src_steps[nsrcs];
ttable_src_t src_tt[nsrcs];
u_int32_t sample = 0;
int srcidx, srcidx1 = 0;
for (srcidx = 0; srcidx < nsrcs; ++srcidx) {
const snd_pcm_plugin_channel_t *src_channel = &src_channels[ttable->srcs[srcidx].channel];
if (!src_channel->enabled)
continue;
srcs[srcidx1] = src_channel->area.addr + src_channel->area.first / 8;
src_steps[srcidx1] = src_channel->area.step / 8;
src_tt[srcidx1] = ttable->srcs[srcidx];
srcidx1++;
}
nsrcs = srcidx1;
if (nsrcs == 0) {
route_to_channel_from_zero(plugin, src_channels, dst_channel, ttable, frames);
return;
} else if (nsrcs == 1 && src_tt[0].as_int == ROUTE_PLUGIN_RESOLUTION) {
route_to_channel_from_one(plugin, src_channels, dst_channel, ttable, frames);
return;
}
dst_channel->enabled = 1;
zero = zero_labels[data->sum_type];
get = get_u_labels[data->get];
add = add_labels[data->sum_type * 2 + ttable->att];
norm = norm_labels[data->sum_type * 8 + ttable->att * 4 + 4 - data->src_sample_size];
put_u32 = put_u32_labels[data->put];
dst = dst_channel->area.addr + dst_channel->area.first / 8;
dst_step = dst_channel->area.step / 8;
while (frames-- > 0) {
ttable_src_t *ttp = src_tt;
sum_t sum;
/* Zero sum */
goto *zero;
zero_int32:
sum.as_uint32 = 0;
goto zero_end;
zero_int64:
sum.as_uint64 = 0;
goto zero_end;
zero_end:
for (srcidx = 0; srcidx < nsrcs; ++srcidx) {
char *src = srcs[srcidx];
/* Get sample */
goto *get;
#define GET_U_END after_get
#include "plugin_ops.h"
#undef GET_U_END
after_get:
/* Sum */
goto *add;
add_int32_att:
sum.as_uint32 += sample * ttp->as_int;
goto after_sum;
add_int32_noatt:
if (ttp->as_int)
sum.as_uint32 += sample;
goto after_sum;
add_int64_att:
sum.as_uint64 += (u_int64_t) sample * ttp->as_int;
goto after_sum;
add_int64_noatt:
if (ttp->as_int)
sum.as_uint64 += sample;
goto after_sum;
after_sum:
srcs[srcidx] += src_steps[srcidx];
ttp++;
}
/* Normalization */
goto *norm;
norm_int32_8_att:
sum.as_uint64 = sum.as_uint32;
norm_int64_8_att:
sum.as_uint64 <<= 8;
norm_int64_0_att:
div(sum.as_uint64);
goto norm_int;
norm_int32_16_att:
sum.as_uint64 = sum.as_uint32;
norm_int64_16_att:
sum.as_uint64 <<= 16;
div(sum.as_uint64);
goto norm_int;
norm_int32_24_att:
sum.as_uint64 = sum.as_uint32;
norm_int64_24_att:
sum.as_uint64 <<= 24;
div(sum.as_uint64);
goto norm_int;
norm_int32_8_noatt:
sum.as_uint64 = sum.as_uint32;
norm_int64_8_noatt:
sum.as_uint64 <<= 8;
goto norm_int;
norm_int32_16_noatt:
sum.as_uint64 = sum.as_uint32;
norm_int64_16_noatt:
sum.as_uint64 <<= 16;
goto norm_int;
norm_int32_24_noatt:
sum.as_uint64 = sum.as_uint32;
norm_int64_24_noatt:
sum.as_uint64 <<= 24;
goto norm_int;
norm_int64_0_noatt:
norm_int:
if (sum.as_uint64 > (u_int32_t)0xffffffff)
sample = (u_int32_t)0xffffffff;
else
sample = sum.as_uint64;
goto after_norm;
after_norm:
/* Put sample */
goto *put_u32;
#define PUT_U32_END after_put_u32
#include "plugin_ops.h"
#undef PUT_U32_END
after_put_u32:
dst += dst_step;
}
}
static int route_src_channels_mask(snd_pcm_plugin_t *plugin,
bitset_t *dst_vmask,
bitset_t **src_vmask)
{
route_t *data = (route_t *)plugin->extra_data;
int schannels = plugin->src_format.channels;
int dchannels = plugin->dst_format.channels;
bitset_t *vmask = plugin->src_vmask;
int channel;
ttable_dst_t *dp = data->ttable;
bitset_zero(vmask, schannels);
for (channel = 0; channel < dchannels; channel++, dp++) {
unsigned int src;
ttable_src_t *sp;
if (!bitset_get(dst_vmask, channel))
continue;
sp = dp->srcs;
for (src = 0; src < dp->nsrcs; src++, sp++)
bitset_set(vmask, sp->channel);
}
*src_vmask = vmask;
return 0;
}
static int route_dst_channels_mask(snd_pcm_plugin_t *plugin,
bitset_t *src_vmask,
bitset_t **dst_vmask)
{
route_t *data = (route_t *)plugin->extra_data;
int dchannels = plugin->dst_format.channels;
bitset_t *vmask = plugin->dst_vmask;
int channel;
ttable_dst_t *dp = data->ttable;
bitset_zero(vmask, dchannels);
for (channel = 0; channel < dchannels; channel++, dp++) {
unsigned int src;
ttable_src_t *sp;
sp = dp->srcs;
for (src = 0; src < dp->nsrcs; src++, sp++) {
if (bitset_get(src_vmask, sp->channel)) {
bitset_set(vmask, channel);
break;
}
}
}
*dst_vmask = vmask;
return 0;
}
static void route_free(snd_pcm_plugin_t *plugin)
{
route_t *data = (route_t *)plugin->extra_data;
unsigned int dst_channel;
for (dst_channel = 0; dst_channel < plugin->dst_format.channels; ++dst_channel) {
kfree(data->ttable[dst_channel].srcs);
}
}
static int route_load_ttable(snd_pcm_plugin_t *plugin,
const route_ttable_entry_t* src_ttable)
{
route_t *data;
unsigned int src_channel, dst_channel;
const route_ttable_entry_t *sptr;
ttable_dst_t *dptr;
if (src_ttable == NULL)
return 0;
data = (route_t *)plugin->extra_data;
dptr = data->ttable;
sptr = src_ttable;
plugin->private_free = route_free;
for (dst_channel = 0; dst_channel < plugin->dst_format.channels; ++dst_channel) {
route_ttable_entry_t t = 0;
int att = 0;
int nsrcs = 0;
ttable_src_t srcs[plugin->src_format.channels];
for (src_channel = 0; src_channel < plugin->src_format.channels; ++src_channel) {
snd_assert(*sptr >= 0 || *sptr <= FULL, return -ENXIO);
if (*sptr != 0) {
srcs[nsrcs].channel = src_channel;
srcs[nsrcs].as_int = *sptr;
if (*sptr != FULL)
att = 1;
t += *sptr;
nsrcs++;
}
sptr++;
}
dptr->att = att;
dptr->nsrcs = nsrcs;
if (nsrcs == 0)
dptr->func = route_to_channel_from_zero;
else if (nsrcs == 1 && !att)
dptr->func = route_to_channel_from_one;
else
dptr->func = route_to_channel;
if (nsrcs > 0) {
int srcidx;
dptr->srcs = kcalloc(nsrcs, sizeof(*srcs), GFP_KERNEL);
for(srcidx = 0; srcidx < nsrcs; srcidx++)
dptr->srcs[srcidx] = srcs[srcidx];
} else
dptr->srcs = NULL;
dptr++;
}
return 0;
}
static snd_pcm_sframes_t route_transfer(snd_pcm_plugin_t *plugin,
const snd_pcm_plugin_channel_t *src_channels,
snd_pcm_plugin_channel_t *dst_channels,
snd_pcm_uframes_t frames)
{
route_t *data;
int src_nchannels, dst_nchannels;
int dst_channel;
ttable_dst_t *ttp;
snd_pcm_plugin_channel_t *dvp;
snd_assert(plugin != NULL && src_channels != NULL && dst_channels != NULL, return -ENXIO);
if (frames == 0)
return 0;
data = (route_t *)plugin->extra_data;
src_nchannels = plugin->src_format.channels;
dst_nchannels = plugin->dst_format.channels;
#ifdef CONFIG_SND_DEBUG
{
int src_channel;
for (src_channel = 0; src_channel < src_nchannels; ++src_channel) {
snd_assert(src_channels[src_channel].area.first % 8 == 0 ||
src_channels[src_channel].area.step % 8 == 0,
return -ENXIO);
}
for (dst_channel = 0; dst_channel < dst_nchannels; ++dst_channel) {
snd_assert(dst_channels[dst_channel].area.first % 8 == 0 ||
dst_channels[dst_channel].area.step % 8 == 0,
return -ENXIO);
}
}
#endif
ttp = data->ttable;
dvp = dst_channels;
for (dst_channel = 0; dst_channel < dst_nchannels; ++dst_channel) {
ttp->func(plugin, src_channels, dvp, ttp, frames);
dvp++;
ttp++;
}
return frames;
}
int getput_index(int format)
{
int sign, width, endian;
sign = !snd_pcm_format_signed(format);
width = snd_pcm_format_width(format) / 8 - 1;
if (width < 0 || width > 3) {
snd_printk(KERN_ERR "snd-pcm-oss: invalid format %d\n", format);
width = 0;
}
#ifdef SNDRV_LITTLE_ENDIAN
endian = snd_pcm_format_big_endian(format);
#else
endian = snd_pcm_format_little_endian(format);
#endif
if (endian < 0)
endian = 0;
return width * 4 + endian * 2 + sign;
}
int snd_pcm_plugin_build_route(snd_pcm_plug_t *plug,
snd_pcm_plugin_format_t *src_format,
snd_pcm_plugin_format_t *dst_format,
route_ttable_entry_t *ttable,
snd_pcm_plugin_t **r_plugin)
{
route_t *data;
snd_pcm_plugin_t *plugin;
int err;
snd_assert(r_plugin != NULL, return -ENXIO);
*r_plugin = NULL;
snd_assert(src_format->rate == dst_format->rate, return -ENXIO);
snd_assert(snd_pcm_format_linear(src_format->format) != 0 &&
snd_pcm_format_linear(dst_format->format) != 0,
return -ENXIO);
err = snd_pcm_plugin_build(plug, "attenuated route conversion",
src_format, dst_format,
sizeof(route_t) + sizeof(data->ttable[0]) * dst_format->channels,
&plugin);
if (err < 0)
return err;
data = (route_t *) plugin->extra_data;
data->get = getput_index(src_format->format);
snd_assert(data->get >= 0 && data->get < 4*2*2, return -EINVAL);
data->put = getput_index(dst_format->format);
snd_assert(data->get >= 0 && data->get < 4*2*2, return -EINVAL);
data->conv = conv_index(src_format->format, dst_format->format);
if (snd_pcm_format_width(src_format->format) == 32)
data->sum_type = R_UINT64;
else
data->sum_type = R_UINT32;
data->src_sample_size = snd_pcm_format_width(src_format->format) / 8;
if ((err = route_load_ttable(plugin, ttable)) < 0) {
snd_pcm_plugin_free(plugin);
return err;
}
plugin->transfer = route_transfer;
plugin->src_channels_mask = route_src_channels_mask;
plugin->dst_channels_mask = route_dst_channels_mask;
*r_plugin = plugin;
return 0;
}
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