/*
- * Attenuated route Plug-In
+ * Route Plug-In
* Copyright (c) 2000 by Abramo Bagnara <abramo@alsa-project.org>
*
*
*/
#include <sound/driver.h>
+
+#ifdef CONFIG_SND_PCM_OSS_PLUGINS
+
#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
-
-struct ttable_dst;
-
-typedef void (*route_channel_f)(struct snd_pcm_plugin *plugin,
- const struct snd_pcm_plugin_channel *src_channels,
- struct snd_pcm_plugin_channel *dst_channel,
- struct ttable_dst *ttable, snd_pcm_uframes_t frames);
-
-struct ttable_src {
- int channel;
- int as_int;
-};
-
-struct ttable_dst {
- int att; /* Attenuated */
- unsigned int nsrcs;
- struct ttable_src *srcs;
- route_channel_f func;
-};
-
-struct route_priv {
- enum {R_UINT32=0, R_UINT64=1} sum_type;
- int get, put;
- int conv;
- int src_sample_size;
- struct ttable_dst ttable[0];
-};
-
-union sum {
- u_int32_t as_uint32;
- u_int64_t as_uint64;
-};
-
-
-static void route_to_channel_from_zero(struct snd_pcm_plugin *plugin,
- const struct snd_pcm_plugin_channel *src_channels,
- struct snd_pcm_plugin_channel *dst_channel,
- struct ttable_dst *ttable,
- 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(struct snd_pcm_plugin *plugin,
- const struct snd_pcm_plugin_channel *src_channels,
- struct snd_pcm_plugin_channel *dst_channel,
- struct ttable_dst *ttable,
- snd_pcm_uframes_t frames)
+static void zero_areas(struct snd_pcm_plugin_channel *dvp, int ndsts,
+ snd_pcm_uframes_t frames, int format)
{
-#define CONV_LABELS
-#include "plugin_ops.h"
-#undef CONV_LABELS
- struct route_priv *data = (struct route_priv *)plugin->extra_data;
- void *conv;
- const struct snd_pcm_plugin_channel *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;
+ int dst = 0;
+ for (; dst < ndsts; ++dst) {
+ if (dvp->wanted)
+ snd_pcm_area_silence(&dvp->area, 0, frames, format);
+ dvp->enabled = 0;
+ dvp++;
}
}
-static void route_to_channel(struct snd_pcm_plugin *plugin,
- const struct snd_pcm_plugin_channel *src_channels,
+static inline void copy_area(const struct snd_pcm_plugin_channel *src_channel,
struct snd_pcm_plugin_channel *dst_channel,
- struct ttable_dst *ttable, snd_pcm_uframes_t frames)
+ snd_pcm_uframes_t frames, int format)
{
-#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,
- };
- struct route_priv *data = (struct route_priv *)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];
- struct ttable_src src_tt[nsrcs];
- u_int32_t sample = 0;
- int srcidx, srcidx1 = 0;
- for (srcidx = 0; srcidx < nsrcs; ++srcidx) {
- const struct snd_pcm_plugin_channel *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) {
- struct ttable_src *ttp = src_tt;
- union sum 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(struct snd_pcm_plugin *plugin,
- unsigned long *dst_vmask,
- unsigned long **src_vmask)
-{
- struct route_priv *data = (struct route_priv *)plugin->extra_data;
- int schannels = plugin->src_format.channels;
- int dchannels = plugin->dst_format.channels;
- unsigned long *vmask = plugin->src_vmask;
- int channel;
- struct ttable_dst *dp = data->ttable;
- bitmap_zero(vmask, schannels);
- for (channel = 0; channel < dchannels; channel++, dp++) {
- unsigned int src;
- struct ttable_src *sp;
- if (!test_bit(channel, dst_vmask))
- continue;
- sp = dp->srcs;
- for (src = 0; src < dp->nsrcs; src++, sp++)
- set_bit(sp->channel, vmask);
- }
- *src_vmask = vmask;
- return 0;
-}
-
-static int route_dst_channels_mask(struct snd_pcm_plugin *plugin,
- unsigned long *src_vmask,
- unsigned long **dst_vmask)
-{
- struct route_priv *data = (struct route_priv *)plugin->extra_data;
- int dchannels = plugin->dst_format.channels;
- unsigned long *vmask = plugin->dst_vmask;
- int channel;
- struct ttable_dst *dp = data->ttable;
- bitmap_zero(vmask, dchannels);
- for (channel = 0; channel < dchannels; channel++, dp++) {
- unsigned int src;
- struct ttable_src *sp;
- sp = dp->srcs;
- for (src = 0; src < dp->nsrcs; src++, sp++) {
- if (test_bit(sp->channel, src_vmask)) {
- set_bit(channel, vmask);
- break;
- }
- }
- }
- *dst_vmask = vmask;
- return 0;
-}
-
-static void route_free(struct snd_pcm_plugin *plugin)
-{
- struct route_priv *data = (struct route_priv *)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(struct snd_pcm_plugin *plugin,
- const int *src_ttable)
-{
- struct route_priv *data;
- unsigned int src_channel, dst_channel;
- const int *sptr;
- struct ttable_dst *dptr;
- if (src_ttable == NULL)
- return 0;
- data = (struct route_priv *)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) {
- int t = 0;
- int att = 0;
- int nsrcs = 0;
- struct ttable_src 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;
+ snd_pcm_area_copy(&src_channel->area, 0, &dst_channel->area, 0, frames, format);
}
static snd_pcm_sframes_t route_transfer(struct snd_pcm_plugin *plugin,
- const struct snd_pcm_plugin_channel *src_channels,
- struct snd_pcm_plugin_channel *dst_channels,
- snd_pcm_uframes_t frames)
+ const struct snd_pcm_plugin_channel *src_channels,
+ struct snd_pcm_plugin_channel *dst_channels,
+ snd_pcm_uframes_t frames)
{
- struct route_priv *data;
- int src_nchannels, dst_nchannels;
- int dst_channel;
- struct ttable_dst *ttp;
+ int nsrcs, ndsts, dst;
struct snd_pcm_plugin_channel *dvp;
+ int format;
snd_assert(plugin != NULL && src_channels != NULL && dst_channels != NULL, return -ENXIO);
if (frames == 0)
return 0;
- data = (struct route_priv *)plugin->extra_data;
- src_nchannels = plugin->src_format.channels;
- dst_nchannels = plugin->dst_format.channels;
+ nsrcs = plugin->src_format.channels;
+ ndsts = 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);
+ format = plugin->dst_format.format;
+ dvp = dst_channels;
+ if (nsrcs <= 1) {
+ /* expand to all channels */
+ for (dst = 0; dst < ndsts; ++dst) {
+ copy_area(src_channels, dvp, frames, format);
+ dvp++;
}
+ return frames;
}
-#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);
+ for (dst = 0; dst < ndsts && dst < nsrcs; ++dst) {
+ copy_area(src_channels, dvp, frames, format);
dvp++;
- ttp++;
+ src_channels++;
}
+ if (dst < ndsts)
+ zero_areas(dvp, ndsts - dst, frames, format);
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(struct snd_pcm_substream *plug,
struct snd_pcm_plugin_format *src_format,
struct snd_pcm_plugin_format *dst_format,
- int *ttable,
struct snd_pcm_plugin **r_plugin)
{
- struct route_priv *data;
struct snd_pcm_plugin *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);
+ snd_assert(src_format->format == dst_format->format, return -ENXIO);
- err = snd_pcm_plugin_build(plug, "attenuated route conversion",
- src_format, dst_format,
- sizeof(struct route_priv) +
- sizeof(data->ttable[0]) * dst_format->channels,
- &plugin);
+ err = snd_pcm_plugin_build(plug, "route conversion",
+ src_format, dst_format, 0, &plugin);
if (err < 0)
return err;
- data = (struct route_priv *)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;
}
+
+#endif
git://git.onelab.eu / linux-2.6.git / blobdiff