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!

1 files changed, 134 insertions, 0 deletions

diff --git a/sound/core/oss/io.c b/sound/core/oss/io.c
new file mode 100644
index 000000000000..bb1c99a5b734
--- /dev/null
+++ b/sound/core/oss/io.c
@@ -0,0 +1,134 @@
+/*
+ *  PCM I/O Plug-In Interface
+ *  Copyright (c) 1999 by Jaroslav Kysela <perex@suse.cz>
+ *
+ *
+ *   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/time.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include "pcm_plugin.h"
+
+#define pcm_write(plug,buf,count) snd_pcm_oss_write3(plug,buf,count,1)
+#define pcm_writev(plug,vec,count) snd_pcm_oss_writev3(plug,vec,count,1)
+#define pcm_read(plug,buf,count) snd_pcm_oss_read3(plug,buf,count,1)
+#define pcm_readv(plug,vec,count) snd_pcm_oss_readv3(plug,vec,count,1)
+
+/*
+ *  Basic io plugin
+ */
+ 
+static snd_pcm_sframes_t io_playback_transfer(snd_pcm_plugin_t *plugin,
+				    const snd_pcm_plugin_channel_t *src_channels,
+				    snd_pcm_plugin_channel_t *dst_channels ATTRIBUTE_UNUSED,
+				    snd_pcm_uframes_t frames)
+{
+	snd_assert(plugin != NULL, return -ENXIO);
+	snd_assert(src_channels != NULL, return -ENXIO);
+	if (plugin->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
+		return pcm_write(plugin->plug, src_channels->area.addr, frames);
+	} else {
+		int channel, channels = plugin->dst_format.channels;
+		void **bufs = (void**)plugin->extra_data;
+		snd_assert(bufs != NULL, return -ENXIO);
+		for (channel = 0; channel < channels; channel++) {
+			if (src_channels[channel].enabled)
+				bufs[channel] = src_channels[channel].area.addr;
+			else
+				bufs[channel] = NULL;
+		}
+		return pcm_writev(plugin->plug, bufs, frames);
+	}
+}
+ 
+static snd_pcm_sframes_t io_capture_transfer(snd_pcm_plugin_t *plugin,
+				   const snd_pcm_plugin_channel_t *src_channels ATTRIBUTE_UNUSED,
+				   snd_pcm_plugin_channel_t *dst_channels,
+				   snd_pcm_uframes_t frames)
+{
+	snd_assert(plugin != NULL, return -ENXIO);
+	snd_assert(dst_channels != NULL, return -ENXIO);
+	if (plugin->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
+		return pcm_read(plugin->plug, dst_channels->area.addr, frames);
+	} else {
+		int channel, channels = plugin->dst_format.channels;
+		void **bufs = (void**)plugin->extra_data;
+		snd_assert(bufs != NULL, return -ENXIO);
+		for (channel = 0; channel < channels; channel++) {
+			if (dst_channels[channel].enabled)
+				bufs[channel] = dst_channels[channel].area.addr;
+			else
+				bufs[channel] = NULL;
+		}
+		return pcm_readv(plugin->plug, bufs, frames);
+	}
+	return 0;
+}
+ 
+static snd_pcm_sframes_t io_src_channels(snd_pcm_plugin_t *plugin,
+			     snd_pcm_uframes_t frames,
+			     snd_pcm_plugin_channel_t **channels)
+{
+	int err;
+	unsigned int channel;
+	snd_pcm_plugin_channel_t *v;
+	err = snd_pcm_plugin_client_channels(plugin, frames, &v);
+	if (err < 0)
+		return err;
+	*channels = v;
+	if (plugin->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
+		for (channel = 0; channel < plugin->src_format.channels; ++channel, ++v)
+			v->wanted = 1;
+	}
+	return frames;
+}
+
+int snd_pcm_plugin_build_io(snd_pcm_plug_t *plug,
+			    snd_pcm_hw_params_t *params,
+			    snd_pcm_plugin_t **r_plugin)
+{
+	int err;
+	snd_pcm_plugin_format_t format;
+	snd_pcm_plugin_t *plugin;
+
+	snd_assert(r_plugin != NULL, return -ENXIO);
+	*r_plugin = NULL;
+	snd_assert(plug != NULL && params != NULL, return -ENXIO);
+	format.format = params_format(params);
+	format.rate = params_rate(params);
+	format.channels = params_channels(params);
+	err = snd_pcm_plugin_build(plug, "I/O io",
+				   &format, &format,
+				   sizeof(void *) * format.channels,
+				   &plugin);
+	if (err < 0)
+		return err;
+	plugin->access = params_access(params);
+	if (snd_pcm_plug_stream(plug) == SNDRV_PCM_STREAM_PLAYBACK) {
+		plugin->transfer = io_playback_transfer;
+		if (plugin->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED)
+			plugin->client_channels = io_src_channels;
+	} else {
+		plugin->transfer = io_capture_transfer;
+	}
+
+	*r_plugin = plugin;
+	return 0;
+}