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!
diff --git a/sound/core/oss/io.c b/sound/core/oss/io.c
new file mode 100644
index 0000000..bb1c99a
--- /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;
+}