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/copy.c b/sound/core/oss/copy.c
new file mode 100644
index 0000000..edecbe7
--- /dev/null
+++ b/sound/core/oss/copy.c
@@ -0,0 +1,87 @@
+/*
+ * Linear conversion 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/time.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include "pcm_plugin.h"
+
+static snd_pcm_sframes_t copy_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)
+{
+ unsigned int channel;
+ unsigned int nchannels;
+
+ snd_assert(plugin != NULL && src_channels != NULL && dst_channels != NULL, return -ENXIO);
+ if (frames == 0)
+ return 0;
+ nchannels = plugin->src_format.channels;
+ for (channel = 0; channel < nchannels; channel++) {
+ snd_assert(src_channels->area.first % 8 == 0 &&
+ src_channels->area.step % 8 == 0,
+ return -ENXIO);
+ snd_assert(dst_channels->area.first % 8 == 0 &&
+ dst_channels->area.step % 8 == 0,
+ return -ENXIO);
+ if (!src_channels->enabled) {
+ if (dst_channels->wanted)
+ snd_pcm_area_silence(&dst_channels->area, 0, frames, plugin->dst_format.format);
+ dst_channels->enabled = 0;
+ continue;
+ }
+ dst_channels->enabled = 1;
+ snd_pcm_area_copy(&src_channels->area, 0, &dst_channels->area, 0, frames, plugin->src_format.format);
+ src_channels++;
+ dst_channels++;
+ }
+ return frames;
+}
+
+int snd_pcm_plugin_build_copy(snd_pcm_plug_t *plug,
+ snd_pcm_plugin_format_t *src_format,
+ snd_pcm_plugin_format_t *dst_format,
+ snd_pcm_plugin_t **r_plugin)
+{
+ int err;
+ snd_pcm_plugin_t *plugin;
+ int width;
+
+ snd_assert(r_plugin != NULL, return -ENXIO);
+ *r_plugin = NULL;
+
+ snd_assert(src_format->format == dst_format->format, return -ENXIO);
+ snd_assert(src_format->rate == dst_format->rate, return -ENXIO);
+ snd_assert(src_format->channels == dst_format->channels, return -ENXIO);
+
+ width = snd_pcm_format_physical_width(src_format->format);
+ snd_assert(width > 0, return -ENXIO);
+
+ err = snd_pcm_plugin_build(plug, "copy", src_format, dst_format,
+ 0, &plugin);
+ if (err < 0)
+ return err;
+ plugin->transfer = copy_transfer;
+ *r_plugin = plugin;
+ return 0;
+}