Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 519 insertions, 0 deletions

diff --git a/sound/core/oss/route.c b/sound/core/oss/route.c
new file mode 100644
index 0000000..c955b7d
--- /dev/null
+++ b/sound/core/oss/route.c
@@ -0,0 +1,519 @@
+/*
+ *  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;
+}