[ALSA] Use standard bitmap functions

Modules: ALSA<-OSS emulation

Use standard bitmap functions instead of in-house ones.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

5 files changed, 53 insertions, 113 deletions

diff --git a/sound/core/oss/io.c b/sound/core/oss/io.c
index bb1c99a..63eca9a 100644
--- a/sound/core/oss/io.c
+++ b/sound/core/oss/io.c
@@ -37,7 +37,7 @@
  
 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_plugin_channel_t *dst_channels,
 				    snd_pcm_uframes_t frames)
 {
 	snd_assert(plugin != NULL, return -ENXIO);
@@ -59,7 +59,7 @@ static snd_pcm_sframes_t io_playback_transfer(snd_pcm_plugin_t *plugin,
 }
  
 static snd_pcm_sframes_t io_capture_transfer(snd_pcm_plugin_t *plugin,
-				   const snd_pcm_plugin_channel_t *src_channels ATTRIBUTE_UNUSED,
+				   const snd_pcm_plugin_channel_t *src_channels,
 				   snd_pcm_plugin_channel_t *dst_channels,
 				   snd_pcm_uframes_t frames)
 {
diff --git a/sound/core/oss/pcm_plugin.c b/sound/core/oss/pcm_plugin.c
index fc23373..312ae1f 100644
--- a/sound/core/oss/pcm_plugin.c
+++ b/sound/core/oss/pcm_plugin.c
@@ -37,21 +37,21 @@
 #define snd_pcm_plug_last(plug) ((plug)->runtime->oss.plugin_last)
 
 static int snd_pcm_plugin_src_channels_mask(snd_pcm_plugin_t *plugin,
-					    bitset_t *dst_vmask,
-					    bitset_t **src_vmask)
+					    unsigned long *dst_vmask,
+					    unsigned long **src_vmask)
 {
-	bitset_t *vmask = plugin->src_vmask;
-	bitset_copy(vmask, dst_vmask, plugin->src_format.channels);
+	unsigned long *vmask = plugin->src_vmask;
+	bitmap_copy(vmask, dst_vmask, plugin->src_format.channels);
 	*src_vmask = vmask;
 	return 0;
 }
 
 static int snd_pcm_plugin_dst_channels_mask(snd_pcm_plugin_t *plugin,
-					    bitset_t *src_vmask,
-					    bitset_t **dst_vmask)
+					    unsigned long *src_vmask,
+					    unsigned long **dst_vmask)
 {
-	bitset_t *vmask = plugin->dst_vmask;
-	bitset_copy(vmask, src_vmask, plugin->dst_format.channels);
+	unsigned long *vmask = plugin->dst_vmask;
+	bitmap_copy(vmask, src_vmask, plugin->dst_format.channels);
 	*dst_vmask = vmask;
 	return 0;
 }
@@ -193,12 +193,12 @@ int snd_pcm_plugin_build(snd_pcm_plug_t *plug,
 		snd_pcm_plugin_free(plugin);
 		return -ENOMEM;
 	}
-	plugin->src_vmask = bitset_alloc(src_format->channels);
+	plugin->src_vmask = bitmap_alloc(src_format->channels);
 	if (plugin->src_vmask == NULL) {
 		snd_pcm_plugin_free(plugin);
 		return -ENOMEM;
 	}
-	plugin->dst_vmask = bitset_alloc(dst_format->channels);
+	plugin->dst_vmask = bitmap_alloc(dst_format->channels);
 	if (plugin->dst_vmask == NULL) {
 		snd_pcm_plugin_free(plugin);
 		return -ENOMEM;
@@ -651,18 +651,18 @@ snd_pcm_sframes_t snd_pcm_plug_client_channels_buf(snd_pcm_plug_t *plug,
 }
 
 static int snd_pcm_plug_playback_channels_mask(snd_pcm_plug_t *plug,
-					       bitset_t *client_vmask)
+					       unsigned long *client_vmask)
 {
 	snd_pcm_plugin_t *plugin = snd_pcm_plug_last(plug);
 	if (plugin == NULL) {
 		return 0;
 	} else {
 		int schannels = plugin->dst_format.channels;
-		bitset_t bs[bitset_size(schannels)];
-		bitset_t *srcmask;
-		bitset_t *dstmask = bs;
+		DECLARE_BITMAP(bs, schannels);
+		unsigned long *srcmask;
+		unsigned long *dstmask = bs;
 		int err;
-		bitset_one(dstmask, schannels);
+		bitmap_fill(dstmask, schannels);
 
 		while (1) {
 			err = plugin->src_channels_mask(plugin, dstmask, &srcmask);
@@ -673,7 +673,7 @@ static int snd_pcm_plug_playback_channels_mask(snd_pcm_plug_t *plug,
 				break;
 			plugin = plugin->prev;
 		}
-		bitset_and(client_vmask, dstmask, plugin->src_format.channels);
+		bitmap_and(client_vmask, client_vmask, dstmask, plugin->src_format.channels);
 		return 0;
 	}
 }
@@ -683,21 +683,21 @@ static int snd_pcm_plug_playback_disable_useless_channels(snd_pcm_plug_t *plug,
 {
 	snd_pcm_plugin_t *plugin = snd_pcm_plug_first(plug);
 	unsigned int nchannels = plugin->src_format.channels;
-	bitset_t bs[bitset_size(nchannels)];
-	bitset_t *srcmask = bs;
+	DECLARE_BITMAP(bs, nchannels);
+	unsigned long *srcmask = bs;
 	int err;
 	unsigned int channel;
 	for (channel = 0; channel < nchannels; channel++) {
 		if (src_channels[channel].enabled)
-			bitset_set(srcmask, channel);
+			set_bit(channel, srcmask);
 		else
-			bitset_reset(srcmask, channel);
+			clear_bit(channel, srcmask);
 	}
 	err = snd_pcm_plug_playback_channels_mask(plug, srcmask);
 	if (err < 0)
 		return err;
 	for (channel = 0; channel < nchannels; channel++) {
-		if (!bitset_get(srcmask, channel))
+		if (!test_bit(channel, srcmask))
 			src_channels[channel].enabled = 0;
 	}
 	return 0;
@@ -709,16 +709,16 @@ static int snd_pcm_plug_capture_disable_useless_channels(snd_pcm_plug_t *plug,
 {
 	snd_pcm_plugin_t *plugin = snd_pcm_plug_last(plug);
 	unsigned int nchannels = plugin->dst_format.channels;
-	bitset_t bs[bitset_size(nchannels)];
-	bitset_t *dstmask = bs;
-	bitset_t *srcmask;
+	DECLARE_BITMAP(bs, nchannels);
+	unsigned long *dstmask = bs;
+	unsigned long *srcmask;
 	int err;
 	unsigned int channel;
 	for (channel = 0; channel < nchannels; channel++) {
 		if (client_channels[channel].enabled)
-			bitset_set(dstmask, channel);
+			set_bit(channel, dstmask);
 		else
-			bitset_reset(dstmask, channel);
+			clear_bit(channel, dstmask);
 	}
 	while (plugin) {
 		err = plugin->src_channels_mask(plugin, dstmask, &srcmask);
@@ -730,7 +730,7 @@ static int snd_pcm_plug_capture_disable_useless_channels(snd_pcm_plug_t *plug,
 	plugin = snd_pcm_plug_first(plug);
 	nchannels = plugin->src_format.channels;
 	for (channel = 0; channel < nchannels; channel++) {
-		if (!bitset_get(dstmask, channel))
+		if (!test_bit(channel, dstmask))
 			src_channels[channel].enabled = 0;
 	}
 	return 0;
diff --git a/sound/core/oss/pcm_plugin.h b/sound/core/oss/pcm_plugin.h
index 0f86ce4..69a4317 100644
--- a/sound/core/oss/pcm_plugin.h
+++ b/sound/core/oss/pcm_plugin.h
@@ -22,71 +22,11 @@
  *
  */
 
-#ifndef ATTRIBUTE_UNUSED
-#define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
-#endif
-
-typedef unsigned int bitset_t;
-
-static inline size_t bitset_size(int nbits)
-{
-	return (nbits + sizeof(bitset_t) * 8 - 1) / (sizeof(bitset_t) * 8);
-}
-
-static inline bitset_t *bitset_alloc(int nbits)
-{
-	return kcalloc(bitset_size(nbits), sizeof(bitset_t), GFP_KERNEL);
-}
-	
-static inline void bitset_set(bitset_t *bitmap, unsigned int pos)
-{
-	size_t bits = sizeof(*bitmap) * 8;
-	bitmap[pos / bits] |= 1 << (pos % bits);
-}
-
-static inline void bitset_reset(bitset_t *bitmap, unsigned int pos)
-{
-	size_t bits = sizeof(*bitmap) * 8;
-	bitmap[pos / bits] &= ~(1 << (pos % bits));
-}
-
-static inline int bitset_get(bitset_t *bitmap, unsigned int pos)
-{
-	size_t bits = sizeof(*bitmap) * 8;
-	return !!(bitmap[pos / bits] & (1 << (pos % bits)));
-}
-
-static inline void bitset_copy(bitset_t *dst, bitset_t *src, unsigned int nbits)
-{
-	memcpy(dst, src, bitset_size(nbits) * sizeof(bitset_t));
-}
-
-static inline void bitset_and(bitset_t *dst, bitset_t *bs, unsigned int nbits)
-{
-	bitset_t *end = dst + bitset_size(nbits);
-	while (dst < end)
-		*dst++ &= *bs++;
-}
-
-static inline void bitset_or(bitset_t *dst, bitset_t *bs, unsigned int nbits)
-{
-	bitset_t *end = dst + bitset_size(nbits);
-	while (dst < end)
-		*dst++ |= *bs++;
-}
-
-static inline void bitset_zero(bitset_t *dst, unsigned int nbits)
-{
-	bitset_t *end = dst + bitset_size(nbits);
-	while (dst < end)
-		*dst++ = 0;
-}
+#include <linux/bitmap.h>
 
-static inline void bitset_one(bitset_t *dst, unsigned int nbits)
+static inline unsigned long *bitmap_alloc(unsigned int nbits)
 {
-	bitset_t *end = dst + bitset_size(nbits);
-	while (dst < end)
-		*dst++ = ~(bitset_t)0;
+	return kmalloc(BITS_TO_LONGS(nbits), GFP_KERNEL);
 }
 
 #define snd_pcm_plug_t snd_pcm_substream_t
@@ -131,11 +71,11 @@ struct _snd_pcm_plugin {
 				 snd_pcm_uframes_t frames,
 				 snd_pcm_plugin_channel_t **channels);
 	int (*src_channels_mask)(snd_pcm_plugin_t *plugin,
-			       bitset_t *dst_vmask,
-			       bitset_t **src_vmask);
+				 unsigned long *dst_vmask,
+				 unsigned long **src_vmask);
 	int (*dst_channels_mask)(snd_pcm_plugin_t *plugin,
-			       bitset_t *src_vmask,
-			       bitset_t **dst_vmask);
+				 unsigned long *src_vmask,
+				 unsigned long **dst_vmask);
 	snd_pcm_sframes_t (*transfer)(snd_pcm_plugin_t *plugin,
 			    const snd_pcm_plugin_channel_t *src_channels,
 			    snd_pcm_plugin_channel_t *dst_channels,
@@ -151,8 +91,8 @@ struct _snd_pcm_plugin {
 	char *buf;
 	snd_pcm_uframes_t buf_frames;
 	snd_pcm_plugin_channel_t *buf_channels;
-	bitset_t *src_vmask;
-	bitset_t *dst_vmask;
+	unsigned long *src_vmask;
+	unsigned long *dst_vmask;
 	char extra_data[0];
 };
 
diff --git a/sound/core/oss/rate.c b/sound/core/oss/rate.c
index 1096ec1..7e325ca 100644
--- a/sound/core/oss/rate.c
+++ b/sound/core/oss/rate.c
@@ -315,7 +315,7 @@ static snd_pcm_sframes_t rate_transfer(snd_pcm_plugin_t *plugin,
 
 static int rate_action(snd_pcm_plugin_t *plugin,
 		       snd_pcm_plugin_action_t action,
-		       unsigned long udata ATTRIBUTE_UNUSED)
+		       unsigned long udata)
 {
 	snd_assert(plugin != NULL, return -ENXIO);
 	switch (action) {
diff --git a/sound/core/oss/route.c b/sound/core/oss/route.c
index c955b7d..7519aed 100644
--- a/sound/core/oss/route.c
+++ b/sound/core/oss/route.c
@@ -70,9 +70,9 @@ typedef union {
 
 
 static void route_to_channel_from_zero(snd_pcm_plugin_t *plugin,
-				     const snd_pcm_plugin_channel_t *src_channels ATTRIBUTE_UNUSED,
+				     const snd_pcm_plugin_channel_t *src_channels,
 				     snd_pcm_plugin_channel_t *dst_channel,
-				     ttable_dst_t* ttable ATTRIBUTE_UNUSED, snd_pcm_uframes_t frames)
+				     ttable_dst_t* ttable, snd_pcm_uframes_t frames)
 {
 	if (dst_channel->wanted)
 		snd_pcm_area_silence(&dst_channel->area, 0, frames, plugin->dst_format.format);
@@ -298,46 +298,46 @@ static void route_to_channel(snd_pcm_plugin_t *plugin,
 }
 
 static int route_src_channels_mask(snd_pcm_plugin_t *plugin,
-				   bitset_t *dst_vmask,
-				   bitset_t **src_vmask)
+				   unsigned long *dst_vmask,
+				   unsigned long **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;
+	unsigned long *vmask = plugin->src_vmask;
 	int channel;
 	ttable_dst_t *dp = data->ttable;
-	bitset_zero(vmask, schannels);
+	bitmap_zero(vmask, schannels);
 	for (channel = 0; channel < dchannels; channel++, dp++) {
 		unsigned int src;
 		ttable_src_t *sp;
-		if (!bitset_get(dst_vmask, channel))
+		if (!test_bit(channel, dst_vmask))
 			continue;
 		sp = dp->srcs;
 		for (src = 0; src < dp->nsrcs; src++, sp++)
-			bitset_set(vmask, sp->channel);
+			set_bit(sp->channel, vmask);
 	}
 	*src_vmask = vmask;
 	return 0;
 }
 
 static int route_dst_channels_mask(snd_pcm_plugin_t *plugin,
-				   bitset_t *src_vmask,
-				   bitset_t **dst_vmask)
+				   unsigned long *src_vmask,
+				   unsigned long **dst_vmask)
 {
 	route_t *data = (route_t *)plugin->extra_data;
 	int dchannels = plugin->dst_format.channels;
-	bitset_t *vmask = plugin->dst_vmask;
+	unsigned long *vmask = plugin->dst_vmask;
 	int channel;
 	ttable_dst_t *dp = data->ttable;
-	bitset_zero(vmask, dchannels);
+	bitmap_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);
+			if (test_bit(sp->channel, src_vmask)) {
+				set_bit(channel, vmask);
 				break;
 			}
 		}