Linux-2.6.12-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!
This commit is contained in:
Linus Torvalds
519
sound/core/oss/route.c
Normal file
519
sound/core/oss/route.c
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@@ -0,0 +1,519 @@
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/*
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* Attenuated route Plug-In
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* Copyright (c) 2000 by Abramo Bagnara <abramo@alsa-project.org>
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*
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*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Library General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <sound/driver.h>
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#include <linux/slab.h>
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#include <linux/time.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include "pcm_plugin.h"
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/* The best possible hack to support missing optimization in gcc 2.7.2.3 */
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#if ROUTE_PLUGIN_RESOLUTION & (ROUTE_PLUGIN_RESOLUTION - 1) != 0
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#define div(a) a /= ROUTE_PLUGIN_RESOLUTION
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#elif ROUTE_PLUGIN_RESOLUTION == 16
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#define div(a) a >>= 4
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#else
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#error "Add some code here"
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#endif
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typedef struct ttable_dst ttable_dst_t;
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typedef struct route_private_data route_t;
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typedef void (*route_channel_f)(snd_pcm_plugin_t *plugin,
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const snd_pcm_plugin_channel_t *src_channels,
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snd_pcm_plugin_channel_t *dst_channel,
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ttable_dst_t* ttable, snd_pcm_uframes_t frames);
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typedef struct {
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int channel;
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int as_int;
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} ttable_src_t;
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struct ttable_dst {
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int att; /* Attenuated */
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unsigned int nsrcs;
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ttable_src_t* srcs;
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route_channel_f func;
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};
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struct route_private_data {
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enum {R_UINT32=0, R_UINT64=1} sum_type;
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int get, put;
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int conv;
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int src_sample_size;
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ttable_dst_t ttable[0];
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};
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typedef union {
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u_int32_t as_uint32;
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u_int64_t as_uint64;
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} sum_t;
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static void route_to_channel_from_zero(snd_pcm_plugin_t *plugin,
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const snd_pcm_plugin_channel_t *src_channels ATTRIBUTE_UNUSED,
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snd_pcm_plugin_channel_t *dst_channel,
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ttable_dst_t* ttable ATTRIBUTE_UNUSED, snd_pcm_uframes_t frames)
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{
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if (dst_channel->wanted)
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snd_pcm_area_silence(&dst_channel->area, 0, frames, plugin->dst_format.format);
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dst_channel->enabled = 0;
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}
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static void route_to_channel_from_one(snd_pcm_plugin_t *plugin,
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const snd_pcm_plugin_channel_t *src_channels,
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snd_pcm_plugin_channel_t *dst_channel,
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ttable_dst_t* ttable, snd_pcm_uframes_t frames)
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{
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#define CONV_LABELS
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#include "plugin_ops.h"
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#undef CONV_LABELS
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route_t *data = (route_t *)plugin->extra_data;
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void *conv;
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const snd_pcm_plugin_channel_t *src_channel = NULL;
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unsigned int srcidx;
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char *src, *dst;
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int src_step, dst_step;
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for (srcidx = 0; srcidx < ttable->nsrcs; ++srcidx) {
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src_channel = &src_channels[ttable->srcs[srcidx].channel];
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if (src_channel->area.addr != NULL)
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break;
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}
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if (srcidx == ttable->nsrcs) {
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route_to_channel_from_zero(plugin, src_channels, dst_channel, ttable, frames);
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return;
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}
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dst_channel->enabled = 1;
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conv = conv_labels[data->conv];
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src = src_channel->area.addr + src_channel->area.first / 8;
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src_step = src_channel->area.step / 8;
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dst = dst_channel->area.addr + dst_channel->area.first / 8;
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dst_step = dst_channel->area.step / 8;
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while (frames-- > 0) {
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goto *conv;
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#define CONV_END after
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#include "plugin_ops.h"
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#undef CONV_END
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after:
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src += src_step;
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dst += dst_step;
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}
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}
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static void route_to_channel(snd_pcm_plugin_t *plugin,
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const snd_pcm_plugin_channel_t *src_channels,
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snd_pcm_plugin_channel_t *dst_channel,
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ttable_dst_t* ttable, snd_pcm_uframes_t frames)
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{
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#define GET_U_LABELS
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#define PUT_U32_LABELS
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#include "plugin_ops.h"
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#undef GET_U_LABELS
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#undef PUT_U32_LABELS
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static void *zero_labels[2] = { &&zero_int32, &&zero_int64 };
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/* sum_type att */
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static void *add_labels[2 * 2] = { &&add_int32_noatt, &&add_int32_att,
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&&add_int64_noatt, &&add_int64_att,
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};
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/* sum_type att shift */
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static void *norm_labels[2 * 2 * 4] = { NULL,
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&&norm_int32_8_noatt,
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&&norm_int32_16_noatt,
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&&norm_int32_24_noatt,
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NULL,
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&&norm_int32_8_att,
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&&norm_int32_16_att,
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&&norm_int32_24_att,
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&&norm_int64_0_noatt,
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&&norm_int64_8_noatt,
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&&norm_int64_16_noatt,
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&&norm_int64_24_noatt,
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&&norm_int64_0_att,
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&&norm_int64_8_att,
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&&norm_int64_16_att,
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&&norm_int64_24_att,
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};
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route_t *data = (route_t *)plugin->extra_data;
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void *zero, *get, *add, *norm, *put_u32;
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int nsrcs = ttable->nsrcs;
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char *dst;
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int dst_step;
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char *srcs[nsrcs];
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int src_steps[nsrcs];
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ttable_src_t src_tt[nsrcs];
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u_int32_t sample = 0;
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int srcidx, srcidx1 = 0;
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for (srcidx = 0; srcidx < nsrcs; ++srcidx) {
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const snd_pcm_plugin_channel_t *src_channel = &src_channels[ttable->srcs[srcidx].channel];
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if (!src_channel->enabled)
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continue;
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srcs[srcidx1] = src_channel->area.addr + src_channel->area.first / 8;
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src_steps[srcidx1] = src_channel->area.step / 8;
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src_tt[srcidx1] = ttable->srcs[srcidx];
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srcidx1++;
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}
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nsrcs = srcidx1;
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if (nsrcs == 0) {
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route_to_channel_from_zero(plugin, src_channels, dst_channel, ttable, frames);
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return;
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} else if (nsrcs == 1 && src_tt[0].as_int == ROUTE_PLUGIN_RESOLUTION) {
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route_to_channel_from_one(plugin, src_channels, dst_channel, ttable, frames);
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return;
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}
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dst_channel->enabled = 1;
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zero = zero_labels[data->sum_type];
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get = get_u_labels[data->get];
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add = add_labels[data->sum_type * 2 + ttable->att];
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norm = norm_labels[data->sum_type * 8 + ttable->att * 4 + 4 - data->src_sample_size];
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put_u32 = put_u32_labels[data->put];
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dst = dst_channel->area.addr + dst_channel->area.first / 8;
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dst_step = dst_channel->area.step / 8;
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while (frames-- > 0) {
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ttable_src_t *ttp = src_tt;
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sum_t sum;
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/* Zero sum */
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goto *zero;
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zero_int32:
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sum.as_uint32 = 0;
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goto zero_end;
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zero_int64:
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sum.as_uint64 = 0;
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goto zero_end;
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zero_end:
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for (srcidx = 0; srcidx < nsrcs; ++srcidx) {
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char *src = srcs[srcidx];
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/* Get sample */
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goto *get;
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#define GET_U_END after_get
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#include "plugin_ops.h"
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#undef GET_U_END
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after_get:
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/* Sum */
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goto *add;
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add_int32_att:
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sum.as_uint32 += sample * ttp->as_int;
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goto after_sum;
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add_int32_noatt:
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if (ttp->as_int)
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sum.as_uint32 += sample;
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goto after_sum;
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add_int64_att:
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sum.as_uint64 += (u_int64_t) sample * ttp->as_int;
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goto after_sum;
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add_int64_noatt:
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if (ttp->as_int)
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sum.as_uint64 += sample;
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goto after_sum;
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after_sum:
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srcs[srcidx] += src_steps[srcidx];
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ttp++;
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}
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/* Normalization */
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goto *norm;
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norm_int32_8_att:
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sum.as_uint64 = sum.as_uint32;
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norm_int64_8_att:
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sum.as_uint64 <<= 8;
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norm_int64_0_att:
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div(sum.as_uint64);
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goto norm_int;
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norm_int32_16_att:
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sum.as_uint64 = sum.as_uint32;
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norm_int64_16_att:
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sum.as_uint64 <<= 16;
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div(sum.as_uint64);
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goto norm_int;
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norm_int32_24_att:
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sum.as_uint64 = sum.as_uint32;
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norm_int64_24_att:
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sum.as_uint64 <<= 24;
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div(sum.as_uint64);
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goto norm_int;
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norm_int32_8_noatt:
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sum.as_uint64 = sum.as_uint32;
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norm_int64_8_noatt:
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sum.as_uint64 <<= 8;
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goto norm_int;
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norm_int32_16_noatt:
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sum.as_uint64 = sum.as_uint32;
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norm_int64_16_noatt:
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sum.as_uint64 <<= 16;
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goto norm_int;
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norm_int32_24_noatt:
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sum.as_uint64 = sum.as_uint32;
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norm_int64_24_noatt:
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sum.as_uint64 <<= 24;
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goto norm_int;
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norm_int64_0_noatt:
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norm_int:
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if (sum.as_uint64 > (u_int32_t)0xffffffff)
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sample = (u_int32_t)0xffffffff;
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else
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sample = sum.as_uint64;
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goto after_norm;
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after_norm:
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/* Put sample */
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goto *put_u32;
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#define PUT_U32_END after_put_u32
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#include "plugin_ops.h"
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#undef PUT_U32_END
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after_put_u32:
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dst += dst_step;
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}
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}
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static int route_src_channels_mask(snd_pcm_plugin_t *plugin,
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bitset_t *dst_vmask,
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bitset_t **src_vmask)
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{
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route_t *data = (route_t *)plugin->extra_data;
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int schannels = plugin->src_format.channels;
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int dchannels = plugin->dst_format.channels;
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bitset_t *vmask = plugin->src_vmask;
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int channel;
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ttable_dst_t *dp = data->ttable;
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bitset_zero(vmask, schannels);
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for (channel = 0; channel < dchannels; channel++, dp++) {
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unsigned int src;
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ttable_src_t *sp;
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if (!bitset_get(dst_vmask, channel))
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continue;
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sp = dp->srcs;
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for (src = 0; src < dp->nsrcs; src++, sp++)
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bitset_set(vmask, sp->channel);
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}
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*src_vmask = vmask;
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return 0;
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}
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static int route_dst_channels_mask(snd_pcm_plugin_t *plugin,
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bitset_t *src_vmask,
|
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bitset_t **dst_vmask)
|
||||
{
|
||||
route_t *data = (route_t *)plugin->extra_data;
|
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int dchannels = plugin->dst_format.channels;
|
||||
bitset_t *vmask = plugin->dst_vmask;
|
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int channel;
|
||||
ttable_dst_t *dp = data->ttable;
|
||||
bitset_zero(vmask, dchannels);
|
||||
for (channel = 0; channel < dchannels; channel++, dp++) {
|
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unsigned int src;
|
||||
ttable_src_t *sp;
|
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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;
|
||||
}
|
||||
Reference in New Issue
Block a user