[ALSA] Clean up pcm-oss plugins

Modules: ALSA<-OSS emulation

Clean up pcm-oss plugin codes.
Removed dead codes, and simplified route/rate plugins.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

sound/core/oss/linear.c

@@ -106,7 +106,7 @@ static snd_pcm_sframes_t linear_transfer(struct snd_pcm_plugin *plugin,
 	return frames;
 }
 
-int conv_index(int src_format, int dst_format)
+static int conv_index(int src_format, int dst_format)
 {
 	int src_endian, dst_endian, sign, src_width, dst_width;
 

sound/core/oss/mulaw.c

@@ -265,6 +265,25 @@ static snd_pcm_sframes_t mulaw_transfer(struct snd_pcm_plugin *plugin,
 	return frames;
 }
 
+static 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_mulaw(struct snd_pcm_substream *plug,
 			       struct snd_pcm_plugin_format *src_format,
 			       struct snd_pcm_plugin_format *dst_format,

sound/core/oss/pcm_plugin.c

@@ -39,26 +39,6 @@
 #define snd_pcm_plug_first(plug) ((plug)->runtime->oss.plugin_first)
 #define snd_pcm_plug_last(plug) ((plug)->runtime->oss.plugin_last)
 
-static int snd_pcm_plugin_src_channels_mask(struct snd_pcm_plugin *plugin,
-					    unsigned long *dst_vmask,
-					    unsigned long **src_vmask)
-{
-	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(struct snd_pcm_plugin *plugin,
-					    unsigned long *src_vmask,
-					    unsigned long **dst_vmask)
-{
-	unsigned long *vmask = plugin->dst_vmask;
-	bitmap_copy(vmask, src_vmask, plugin->dst_format.channels);
-	*dst_vmask = vmask;
-	return 0;
-}
-
 /*
  *  because some cards might have rates "very close", we ignore
  *  all "resampling" requests within +-5%
@@ -196,19 +176,7 @@ int snd_pcm_plugin_build(struct snd_pcm_substream *plug,
 		snd_pcm_plugin_free(plugin);
 		return -ENOMEM;
 	}
-	plugin->src_vmask = bitmap_alloc(src_format->channels);
-	if (plugin->src_vmask == NULL) {
-		snd_pcm_plugin_free(plugin);
-		return -ENOMEM;
-	}
-	plugin->dst_vmask = bitmap_alloc(dst_format->channels);
-	if (plugin->dst_vmask == NULL) {
-		snd_pcm_plugin_free(plugin);
-		return -ENOMEM;
-	}
 	plugin->client_channels = snd_pcm_plugin_client_channels;
-	plugin->src_channels_mask = snd_pcm_plugin_src_channels_mask;
-	plugin->dst_channels_mask = snd_pcm_plugin_dst_channels_mask;
 	*ret = plugin;
 	return 0;
 }
@@ -221,8 +189,6 @@ int snd_pcm_plugin_free(struct snd_pcm_plugin *plugin)
 		plugin->private_free(plugin);
 	kfree(plugin->buf_channels);
 	vfree(plugin->buf);
-	kfree(plugin->src_vmask);
-	kfree(plugin->dst_vmask);
 	kfree(plugin);
 	return 0;
 }
@@ -432,24 +398,14 @@ int snd_pcm_plug_format_plugins(struct snd_pcm_substream *plug,
 		 dstformat.channels);
 
 	/* Format change (linearization) */
-	if ((srcformat.format != dstformat.format ||
-	     !rate_match(srcformat.rate, dstformat.rate) ||
-	     srcformat.channels != dstformat.channels) &&
-	    !snd_pcm_format_linear(srcformat.format)) {
-		if (snd_pcm_format_linear(dstformat.format))
-			tmpformat.format = dstformat.format;
-		else
-			tmpformat.format = SNDRV_PCM_FORMAT_S16;
-		switch (srcformat.format) {
-		case SNDRV_PCM_FORMAT_MU_LAW:
-			err = snd_pcm_plugin_build_mulaw(plug,
-							 &srcformat, &tmpformat,
-							 &plugin);
-			break;
-		default:
+	if (! rate_match(srcformat.rate, dstformat.rate) &&
+	    ! snd_pcm_format_linear(srcformat.format)) {
+		if (srcformat.format != SNDRV_PCM_FORMAT_MU_LAW)
 			return -EINVAL;
-		}
-		pdprintf("format change: src=%i, dst=%i returns %i\n", srcformat.format, tmpformat.format, err);
+		tmpformat.format = SNDRV_PCM_FORMAT_S16;
+		err = snd_pcm_plugin_build_mulaw(plug,
+						 &srcformat, &tmpformat,
+						 &plugin);
 		if (err < 0)
 			return err;
 		err = snd_pcm_plugin_append(plugin);
@@ -463,35 +419,11 @@ int snd_pcm_plug_format_plugins(struct snd_pcm_substream *plug,
 
 	/* channels reduction */
 	if (srcformat.channels > dstformat.channels) {
-		int sv = srcformat.channels;
-		int dv = dstformat.channels;
-		int *ttable = kcalloc(dv * sv, sizeof(*ttable), GFP_KERNEL);
-		if (ttable == NULL)
-			return -ENOMEM;
-#if 1
-		if (sv == 2 && dv == 1) {
-			ttable[0] = HALF;
-			ttable[1] = HALF;
-		} else
-#endif
-		{
-			int v;
-			for (v = 0; v < dv; ++v)
-				ttable[v * sv + v] = FULL;
-		}
 		tmpformat.channels = dstformat.channels;
-		if (rate_match(srcformat.rate, dstformat.rate) &&
-		    snd_pcm_format_linear(dstformat.format))
-			tmpformat.format = dstformat.format;
-		err = snd_pcm_plugin_build_route(plug,
-						 &srcformat, &tmpformat,
-						 ttable, &plugin);
-		kfree(ttable);
+		err = snd_pcm_plugin_build_route(plug, &srcformat, &tmpformat, &plugin);
 		pdprintf("channels reduction: src=%i, dst=%i returns %i\n", srcformat.channels, tmpformat.channels, err);
-		if (err < 0) {
-			snd_pcm_plugin_free(plugin);
+		if (err < 0)
 			return err;
-		}
 		err = snd_pcm_plugin_append(plugin);
 		if (err < 0) {
 			snd_pcm_plugin_free(plugin);
@@ -503,18 +435,29 @@ int snd_pcm_plug_format_plugins(struct snd_pcm_substream *plug,
 
 	/* rate resampling */
 	if (!rate_match(srcformat.rate, dstformat.rate)) {
+		if (srcformat.format != SNDRV_PCM_FORMAT_S16) {
+			/* convert to S16 for resampling */
+			tmpformat.format = SNDRV_PCM_FORMAT_S16;
+			err = snd_pcm_plugin_build_linear(plug,
+							  &srcformat, &tmpformat,
+							  &plugin);
+			if (err < 0)
+				return err;
+			err = snd_pcm_plugin_append(plugin);
+			if (err < 0) {
+				snd_pcm_plugin_free(plugin);
+				return err;
+			}
+			srcformat = tmpformat;
+			src_access = dst_access;
+		}
 		tmpformat.rate = dstformat.rate;
-		if (srcformat.channels == dstformat.channels &&
-		    snd_pcm_format_linear(dstformat.format))
-			tmpformat.format = dstformat.format;
         	err = snd_pcm_plugin_build_rate(plug,
         					&srcformat, &tmpformat,
 						&plugin);
 		pdprintf("rate down resampling: src=%i, dst=%i returns %i\n", srcformat.rate, tmpformat.rate, err);
-		if (err < 0) {
-			snd_pcm_plugin_free(plugin);
+		if (err < 0)
 			return err;
-		}      					    
 		err = snd_pcm_plugin_append(plugin);
 		if (err < 0) {
 			snd_pcm_plugin_free(plugin);
@@ -524,52 +467,6 @@ int snd_pcm_plug_format_plugins(struct snd_pcm_substream *plug,
 		src_access = dst_access;
         }
 
-	/* channels extension  */
-	if (srcformat.channels < dstformat.channels) {
-		int sv = srcformat.channels;
-		int dv = dstformat.channels;
-		int *ttable = kcalloc(dv * sv, sizeof(*ttable), GFP_KERNEL);
-		if (ttable == NULL)
-			return -ENOMEM;
-#if 0
-		{
-			int v;
-			for (v = 0; v < sv; ++v)
-				ttable[v * sv + v] = FULL;
-		}
-#else
-		{
-			/* Playback is spreaded on all channels */
-			int vd, vs;
-			for (vd = 0, vs = 0; vd < dv; ++vd) {
-				ttable[vd * sv + vs] = FULL;
-				vs++;
-				if (vs == sv)
-					vs = 0;
-			}
-		}
-#endif
-		tmpformat.channels = dstformat.channels;
-		if (snd_pcm_format_linear(dstformat.format))
-			tmpformat.format = dstformat.format;
-		err = snd_pcm_plugin_build_route(plug,
-						 &srcformat, &tmpformat,
-						 ttable, &plugin);
-		kfree(ttable);
-		pdprintf("channels extension: src=%i, dst=%i returns %i\n", srcformat.channels, tmpformat.channels, err);
-		if (err < 0) {
-			snd_pcm_plugin_free(plugin);
-			return err;
-		}      					    
-		err = snd_pcm_plugin_append(plugin);
-		if (err < 0) {
-			snd_pcm_plugin_free(plugin);
-			return err;
-		}
-		srcformat = tmpformat;
-		src_access = dst_access;
-	}
-
 	/* format change */
 	if (srcformat.format != dstformat.format) {
 		tmpformat.format = dstformat.format;
@@ -598,6 +495,22 @@ int snd_pcm_plug_format_plugins(struct snd_pcm_substream *plug,
 		src_access = dst_access;
 	}
 
+	/* channels extension */
+	if (srcformat.channels < dstformat.channels) {
+		tmpformat.channels = dstformat.channels;
+		err = snd_pcm_plugin_build_route(plug, &srcformat, &tmpformat, &plugin);
+		pdprintf("channels extension: src=%i, dst=%i returns %i\n", srcformat.channels, tmpformat.channels, err);
+		if (err < 0)
+			return err;
+		err = snd_pcm_plugin_append(plugin);
+		if (err < 0) {
+			snd_pcm_plugin_free(plugin);
+			return err;
+		}
+		srcformat = tmpformat;
+		src_access = dst_access;
+	}
+
 	/* de-interleave */
 	if (src_access != dst_access) {
 		err = snd_pcm_plugin_build_copy(plug,
@@ -653,92 +566,6 @@ snd_pcm_sframes_t snd_pcm_plug_client_channels_buf(struct snd_pcm_substream *plu
 	return count;
 }
 
-static int snd_pcm_plug_playback_channels_mask(struct snd_pcm_substream *plug,
-					       unsigned long *client_vmask)
-{
-	struct snd_pcm_plugin *plugin = snd_pcm_plug_last(plug);
-	if (plugin == NULL) {
-		return 0;
-	} else {
-		int schannels = plugin->dst_format.channels;
-		DECLARE_BITMAP(bs, schannels);
-		unsigned long *srcmask;
-		unsigned long *dstmask = bs;
-		int err;
-		bitmap_fill(dstmask, schannels);
-
-		while (1) {
-			err = plugin->src_channels_mask(plugin, dstmask, &srcmask);
-			if (err < 0)
-				return err;
-			dstmask = srcmask;
-			if (plugin->prev == NULL)
-				break;
-			plugin = plugin->prev;
-		}
-		bitmap_and(client_vmask, client_vmask, dstmask, plugin->src_format.channels);
-		return 0;
-	}
-}
-
-static int snd_pcm_plug_playback_disable_useless_channels(struct snd_pcm_substream *plug,
-							  struct snd_pcm_plugin_channel *src_channels)
-{
-	struct snd_pcm_plugin *plugin = snd_pcm_plug_first(plug);
-	unsigned int nchannels = plugin->src_format.channels;
-	DECLARE_BITMAP(bs, nchannels);
-	unsigned long *srcmask = bs;
-	int err;
-	unsigned int channel;
-	for (channel = 0; channel < nchannels; channel++) {
-		if (src_channels[channel].enabled)
-			set_bit(channel, srcmask);
-		else
-			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 (!test_bit(channel, srcmask))
-			src_channels[channel].enabled = 0;
-	}
-	return 0;
-}
-
-static int snd_pcm_plug_capture_disable_useless_channels(struct snd_pcm_substream *plug,
-							 struct snd_pcm_plugin_channel *src_channels,
-							 struct snd_pcm_plugin_channel *client_channels)
-{
-	struct snd_pcm_plugin *plugin = snd_pcm_plug_last(plug);
-	unsigned int nchannels = plugin->dst_format.channels;
-	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)
-			set_bit(channel, dstmask);
-		else
-			clear_bit(channel, dstmask);
-	}
-	while (plugin) {
-		err = plugin->src_channels_mask(plugin, dstmask, &srcmask);
-		if (err < 0)
-			return err;
-		dstmask = srcmask;
-		plugin = plugin->prev;
-	}
-	plugin = snd_pcm_plug_first(plug);
-	nchannels = plugin->src_format.channels;
-	for (channel = 0; channel < nchannels; channel++) {
-		if (!test_bit(channel, dstmask))
-			src_channels[channel].enabled = 0;
-	}
-	return 0;
-}
-
 snd_pcm_sframes_t snd_pcm_plug_write_transfer(struct snd_pcm_substream *plug, struct snd_pcm_plugin_channel *src_channels, snd_pcm_uframes_t size)
 {
 	struct snd_pcm_plugin *plugin, *next;
@@ -746,9 +573,6 @@ snd_pcm_sframes_t snd_pcm_plug_write_transfer(struct snd_pcm_substream *plug, st
 	int err;
 	snd_pcm_sframes_t frames = size;
 
-	if ((err = snd_pcm_plug_playback_disable_useless_channels(plug, src_channels)) < 0)
-		return err;
-	
 	plugin = snd_pcm_plug_first(plug);
 	while (plugin && frames > 0) {
 		if ((next = plugin->next) != NULL) {
@@ -793,10 +617,6 @@ snd_pcm_sframes_t snd_pcm_plug_read_transfer(struct snd_pcm_substream *plug, str
 				return err;
 			}
 			frames = err;
-			if (!plugin->prev) {
-				if ((err = snd_pcm_plug_capture_disable_useless_channels(plug, dst_channels, dst_channels_final)) < 0)
-					return err;
-			}
 		} else {
 			dst_channels = dst_channels_final;
 		}

sound/core/oss/pcm_plugin.h

@@ -24,13 +24,6 @@
 
 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
 
-#include <linux/bitmap.h>
-
-static inline unsigned long *bitmap_alloc(unsigned int nbits)
-{
-	return kmalloc(BITS_TO_LONGS(nbits), GFP_KERNEL);
-}
-
 #define snd_pcm_plug_stream(plug) ((plug)->stream)
 
 enum snd_pcm_plugin_action {
@@ -71,12 +64,6 @@ struct snd_pcm_plugin {
 	snd_pcm_sframes_t (*client_channels)(struct snd_pcm_plugin *plugin,
 					     snd_pcm_uframes_t frames,
 					     struct snd_pcm_plugin_channel **channels);
-	int (*src_channels_mask)(struct snd_pcm_plugin *plugin,
-				 unsigned long *dst_vmask,
-				 unsigned long **src_vmask);
-	int (*dst_channels_mask)(struct snd_pcm_plugin *plugin,
-				 unsigned long *src_vmask,
-				 unsigned long **dst_vmask);
 	snd_pcm_sframes_t (*transfer)(struct snd_pcm_plugin *plugin,
 				      const struct snd_pcm_plugin_channel *src_channels,
 				      struct snd_pcm_plugin_channel *dst_channels,
@@ -92,8 +79,6 @@ struct snd_pcm_plugin {
 	char *buf;
 	snd_pcm_uframes_t buf_frames;
 	struct snd_pcm_plugin_channel *buf_channels;
-	unsigned long *src_vmask;
-	unsigned long *dst_vmask;
 	char extra_data[0];
 };
 
@@ -130,7 +115,6 @@ int snd_pcm_plugin_build_rate(struct snd_pcm_substream *handle,
 int snd_pcm_plugin_build_route(struct snd_pcm_substream *handle,
 			       struct snd_pcm_plugin_format *src_format,
 			       struct snd_pcm_plugin_format *dst_format,
-			       int *ttable,
 		               struct snd_pcm_plugin **r_plugin);
 int snd_pcm_plugin_build_copy(struct snd_pcm_substream *handle,
 			      struct snd_pcm_plugin_format *src_format,
@@ -183,16 +167,6 @@ snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream,
 				     void **bufs, snd_pcm_uframes_t frames,
 				     int in_kernel);
 
-#define ROUTE_PLUGIN_RESOLUTION 16
-
-int getput_index(int format);
-int copy_index(int format);
-int conv_index(int src_format, int dst_format);
-
-void zero_channel(struct snd_pcm_plugin *plugin,
-		  const struct snd_pcm_plugin_channel *dst_channel,
-		  size_t samples);
-
 #else
 
 static inline snd_pcm_sframes_t snd_pcm_plug_client_size(struct snd_pcm_substream *handle, snd_pcm_uframes_t drv_size) { return drv_size; }

sound/core/oss/plugin_ops.h

@@ -362,172 +362,6 @@ put_s16_xx12_0029: as_u32(dst) = (u_int32_t)swab16(sample) ^ 0x80; goto PUT_S16_
 }
 #endif
 
-#if 0
-#ifdef GET32_LABELS
-/* src_wid src_endswap unsigned */
-static void *get32_labels[4 * 2 * 2] = {
-	&&get32_xxx1_1000,	 /*  8h -> 32h */
-	&&get32_xxx1_9000,	 /*  8h ^> 32h */
-	&&get32_xxx1_1000,	 /*  8s -> 32h */
-	&&get32_xxx1_9000,	 /*  8s ^> 32h */
-	&&get32_xx12_1200,	 /* 16h -> 32h */
-	&&get32_xx12_9200,	 /* 16h ^> 32h */
-	&&get32_xx12_2100,	 /* 16s -> 32h */
-	&&get32_xx12_A100,	 /* 16s ^> 32h */
-	&&get32_x123_1230,	 /* 24h -> 32h */
-	&&get32_x123_9230,	 /* 24h ^> 32h */
-	&&get32_123x_3210,	 /* 24s -> 32h */
-	&&get32_123x_B210,	 /* 24s ^> 32h */
-	&&get32_1234_1234,	 /* 32h -> 32h */
-	&&get32_1234_9234,	 /* 32h ^> 32h */
-	&&get32_1234_4321,	 /* 32s -> 32h */
-	&&get32_1234_C321,	 /* 32s ^> 32h */
-};
-#endif
-
-#ifdef GET32_END
-while (0) {
-get32_xxx1_1000: sample = (u_int32_t)as_u8(src) << 24; goto GET32_END;
-get32_xxx1_9000: sample = (u_int32_t)(as_u8(src) ^ 0x80) << 24; goto GET32_END;
-get32_xx12_1200: sample = (u_int32_t)as_u16(src) << 16; goto GET32_END;
-get32_xx12_9200: sample = (u_int32_t)(as_u16(src) ^ 0x8000) << 16; goto GET32_END;
-get32_xx12_2100: sample = (u_int32_t)swab16(as_u16(src)) << 16; goto GET32_END;
-get32_xx12_A100: sample = (u_int32_t)swab16(as_u16(src) ^ 0x80) << 16; goto GET32_END;
-get32_x123_1230: sample = as_u32(src) << 8; goto GET32_END;
-get32_x123_9230: sample = (as_u32(src) << 8) ^ 0x80000000; goto GET32_END;
-get32_123x_3210: sample = swab32(as_u32(src) >> 8); goto GET32_END;
-get32_123x_B210: sample = swab32((as_u32(src) >> 8) ^ 0x80); goto GET32_END;
-get32_1234_1234: sample = as_u32(src); goto GET32_END;
-get32_1234_9234: sample = as_u32(src) ^ 0x80000000; goto GET32_END;
-get32_1234_4321: sample = swab32(as_u32(src)); goto GET32_END;
-get32_1234_C321: sample = swab32(as_u32(src) ^ 0x80); goto GET32_END;
-}
-#endif
-#endif
-
-#ifdef PUT_U32_LABELS
-/* dst_wid dst_endswap unsigned */
-static void *put_u32_labels[4 * 2 * 2] = {
-	&&put_u32_1234_xxx9,	 /* u32h ->  s8h */
-	&&put_u32_1234_xxx1,	 /* u32h ->  u8h */
-	&&put_u32_1234_xxx9,	 /* u32h ->  s8s */
-	&&put_u32_1234_xxx1,	 /* u32h ->  u8s */
-	&&put_u32_1234_xx92,	 /* u32h -> s16h */
-	&&put_u32_1234_xx12,	 /* u32h -> u16h */
-	&&put_u32_1234_xx29,	 /* u32h -> s16s */
-	&&put_u32_1234_xx21,	 /* u32h -> u16s */
-	&&put_u32_1234_x923,	 /* u32h -> s24h */
-	&&put_u32_1234_x123,	 /* u32h -> u24h */
-	&&put_u32_1234_329x,	 /* u32h -> s24s */
-	&&put_u32_1234_321x,	 /* u32h -> u24s */
-	&&put_u32_1234_9234,	 /* u32h -> s32h */
-	&&put_u32_1234_1234,	 /* u32h -> u32h */
-	&&put_u32_1234_4329,	 /* u32h -> s32s */
-	&&put_u32_1234_4321,	 /* u32h -> u32s */
-};
-#endif
-
-#ifdef PUT_U32_END
-while (0) {
-put_u32_1234_xxx1: as_u8(dst) = sample >> 24; goto PUT_U32_END;
-put_u32_1234_xxx9: as_u8(dst) = (sample >> 24) ^ 0x80; goto PUT_U32_END;
-put_u32_1234_xx12: as_u16(dst) = sample >> 16; goto PUT_U32_END;
-put_u32_1234_xx92: as_u16(dst) = (sample >> 16) ^ 0x8000; goto PUT_U32_END;
-put_u32_1234_xx21: as_u16(dst) = swab16(sample >> 16); goto PUT_U32_END;
-put_u32_1234_xx29: as_u16(dst) = swab16(sample >> 16) ^ 0x80; goto PUT_U32_END;
-put_u32_1234_x123: as_u32(dst) = sample >> 8; goto PUT_U32_END;
-put_u32_1234_x923: as_u32(dst) = (sample >> 8) ^ 0x800000; goto PUT_U32_END;
-put_u32_1234_321x: as_u32(dst) = swab32(sample) << 8; goto PUT_U32_END;
-put_u32_1234_329x: as_u32(dst) = (swab32(sample) ^ 0x80) << 8; goto PUT_U32_END;
-put_u32_1234_1234: as_u32(dst) = sample; goto PUT_U32_END;
-put_u32_1234_9234: as_u32(dst) = sample ^ 0x80000000; goto PUT_U32_END;
-put_u32_1234_4321: as_u32(dst) = swab32(sample); goto PUT_U32_END;
-put_u32_1234_4329: as_u32(dst) = swab32(sample) ^ 0x80; goto PUT_U32_END;
-}
-#endif
-
-#ifdef GET_U_LABELS
-/* width endswap unsigned*/
-static void *get_u_labels[4 * 2 * 2] = {
-	&&get_u_s8,	/* s8  ->  u8  */
-	&&get_u_u8,	/* u8  ->  u8  */
-	&&get_u_s8,	/* s8  ->  u8  */
-	&&get_u_u8,	/* u8  ->  u8  */
-	&&get_u_s16h,	/* s16h -> u16h */
-	&&get_u_u16h,	/* u16h -> u16h */
-	&&get_u_s16s,	/* s16s -> u16h */
-	&&get_u_u16s,	/* u16s -> u16h */
-	&&get_u_s24h,	/* s24h -> u32h */
-	&&get_u_u24h,	/* u24h -> u32h */
-	&&get_u_s24s,	/* s24s -> u32h */
-	&&get_u_u24s,	/* u24s -> u32h */
-	&&get_u_s32h,	/* s32h -> u32h */
-	&&get_u_u32h,	/* u32h -> u32h */
-	&&get_u_s32s,	/* s32s -> u32h */
-	&&get_u_u32s,	/* u32s -> u32h */
-};
-#endif
-
-#ifdef GET_U_END
-while (0) {
-get_u_s8: sample = as_u8(src) ^ 0x80; goto GET_U_END;
-get_u_u8: sample = as_u8(src); goto GET_U_END;
-get_u_s16h: sample = as_u16(src) ^ 0x8000; goto GET_U_END;
-get_u_u16h: sample = as_u16(src); goto GET_U_END;
-get_u_s16s: sample = swab16(as_u16(src) ^ 0x80); goto GET_U_END;
-get_u_u16s: sample = swab16(as_u16(src)); goto GET_U_END;
-get_u_s24h: sample = (as_u32(src) ^ 0x800000); goto GET_U_END;
-get_u_u24h: sample = as_u32(src); goto GET_U_END;
-get_u_s24s: sample = swab32(as_u32(src) ^ 0x800000); goto GET_U_END;
-get_u_u24s: sample = swab32(as_u32(src)); goto GET_U_END;
-get_u_s32h: sample = as_u32(src) ^ 0x80000000; goto GET_U_END;
-get_u_u32h: sample = as_u32(src); goto GET_U_END;
-get_u_s32s: sample = swab32(as_u32(src) ^ 0x80); goto GET_U_END;
-get_u_u32s: sample = swab32(as_u32(src)); goto GET_U_END;
-}
-#endif
-
-#if 0
-#ifdef PUT_LABELS
-/* width endswap unsigned */
-static void *put_labels[4 * 2 * 2] = {
-	&&put_s8,	/* s8  ->  s8  */
-	&&put_u8,	/* u8  ->  s8  */
-	&&put_s8,	/* s8  ->  s8  */
-	&&put_u8,	/* u8  ->  s8  */
-	&&put_s16h,	/* s16h -> s16h */
-	&&put_u16h,	/* u16h -> s16h */
-	&&put_s16s,	/* s16s -> s16h */
-	&&put_u16s,	/* u16s -> s16h */
-	&&put_s24h,	/* s24h -> s32h */
-	&&put_u24h,	/* u24h -> s32h */
-	&&put_s24s,	/* s24s -> s32h */
-	&&put_u24s,	/* u24s -> s32h */
-	&&put_s32h,	/* s32h -> s32h */
-	&&put_u32h,	/* u32h -> s32h */
-	&&put_s32s,	/* s32s -> s32h */
-	&&put_u32s,	/* u32s -> s32h */
-};
-#endif
-
-#ifdef PUT_END
-put_s8: as_s8(dst) = sample; goto PUT_END;
-put_u8: as_u8(dst) = sample ^ 0x80; goto PUT_END;
-put_s16h: as_s16(dst) = sample; goto PUT_END;
-put_u16h: as_u16(dst) = sample ^ 0x8000; goto PUT_END;
-put_s16s: as_s16(dst) = swab16(sample); goto PUT_END;
-put_u16s: as_u16(dst) = swab16(sample ^ 0x80); goto PUT_END;
-put_s24h: as_s24(dst) = sample & 0xffffff; goto PUT_END;
-put_u24h: as_u24(dst) = sample ^ 0x80000000; goto PUT_END;
-put_s24s: as_s24(dst) = swab32(sample & 0xffffff); goto PUT_END;
-put_u24s: as_u24(dst) = swab32(sample ^ 0x80); goto PUT_END;
-put_s32h: as_s32(dst) = sample; goto PUT_END;
-put_u32h: as_u32(dst) = sample ^ 0x80000000; goto PUT_END;
-put_s32s: as_s32(dst) = swab32(sample); goto PUT_END;
-put_u32s: as_u32(dst) = swab32(sample ^ 0x80); goto PUT_END;
-#endif
-#endif
-
 #undef as_u8
 #undef as_u16
 #undef as_u32

sound/core/oss/rate.c

@@ -50,7 +50,6 @@ struct rate_priv {
 	unsigned int pitch;
 	unsigned int pos;
 	rate_f func;
-	int get, put;
 	snd_pcm_sframes_t old_src_frames, old_dst_frames;
 	struct rate_channel channels[0];
 };
@@ -74,21 +73,12 @@ static void resample_expand(struct snd_pcm_plugin *plugin,
 	unsigned int pos = 0;
 	signed int val;
 	signed short S1, S2;
-	char *src, *dst;
+	signed short *src, *dst;
 	unsigned int channel;
 	int src_step, dst_step;
 	int src_frames1, dst_frames1;
 	struct rate_priv *data = (struct rate_priv *)plugin->extra_data;
 	struct rate_channel *rchannels = data->channels;
-
-#define GET_S16_LABELS
-#define PUT_S16_LABELS
-#include "plugin_ops.h"
-#undef GET_S16_LABELS
-#undef PUT_S16_LABELS
-	void *get = get_s16_labels[data->get];
-	void *put = put_s16_labels[data->put];
-	signed short sample = 0;
 	
 	for (channel = 0; channel < plugin->src_format.channels; channel++) {
 		pos = data->pos;
@@ -101,10 +91,12 @@ static void resample_expand(struct snd_pcm_plugin *plugin,
 			continue;
 		}
 		dst_channels[channel].enabled = 1;
-		src = (char *)src_channels[channel].area.addr + src_channels[channel].area.first / 8;
-		dst = (char *)dst_channels[channel].area.addr + dst_channels[channel].area.first / 8;
-		src_step = src_channels[channel].area.step / 8;
-		dst_step = dst_channels[channel].area.step / 8;
+		src = (signed short *)src_channels[channel].area.addr +
+			src_channels[channel].area.first / 8 / 2;
+		dst = (signed short *)dst_channels[channel].area.addr +
+			dst_channels[channel].area.first / 8 / 2;
+		src_step = src_channels[channel].area.step / 8 / 2;
+		dst_step = dst_channels[channel].area.step / 8 / 2;
 		src_frames1 = src_frames;
 		dst_frames1 = dst_frames;
 		while (dst_frames1-- > 0) {
@@ -112,12 +104,7 @@ static void resample_expand(struct snd_pcm_plugin *plugin,
 				pos &= R_MASK;
 				S1 = S2;
 				if (src_frames1-- > 0) {
-					goto *get;
-#define GET_S16_END after_get
-#include "plugin_ops.h"
-#undef GET_S16_END
-				after_get:
-					S2 = sample;
+					S2 = *src;
 					src += src_step;
 				}
 			}
@@ -126,12 +113,7 @@ static void resample_expand(struct snd_pcm_plugin *plugin,
 				val = -32768;
 			else if (val > 32767)
 				val = 32767;
-			sample = val;
-			goto *put;
-#define PUT_S16_END after_put
-#include "plugin_ops.h"
-#undef PUT_S16_END
-		after_put:
+			*dst = val;
 			dst += dst_step;
 			pos += data->pitch;
 		}
@@ -150,21 +132,12 @@ static void resample_shrink(struct snd_pcm_plugin *plugin,
 	unsigned int pos = 0;
 	signed int val;
 	signed short S1, S2;
-	char *src, *dst;
+	signed short *src, *dst;
 	unsigned int channel;
 	int src_step, dst_step;
 	int src_frames1, dst_frames1;
 	struct rate_priv *data = (struct rate_priv *)plugin->extra_data;
 	struct rate_channel *rchannels = data->channels;
-	
-#define GET_S16_LABELS
-#define PUT_S16_LABELS
-#include "plugin_ops.h"
-#undef GET_S16_LABELS
-#undef PUT_S16_LABELS
-	void *get = get_s16_labels[data->get];
-	void *put = put_s16_labels[data->put];
-	signed short sample = 0;
 
 	for (channel = 0; channel < plugin->src_format.channels; ++channel) {
 		pos = data->pos;
@@ -177,21 +150,18 @@ static void resample_shrink(struct snd_pcm_plugin *plugin,
 			continue;
 		}
 		dst_channels[channel].enabled = 1;
-		src = (char *)src_channels[channel].area.addr + src_channels[channel].area.first / 8;
-		dst = (char *)dst_channels[channel].area.addr + dst_channels[channel].area.first / 8;
-		src_step = src_channels[channel].area.step / 8;
-		dst_step = dst_channels[channel].area.step / 8;
+		src = (signed short *)src_channels[channel].area.addr +
+			src_channels[channel].area.first / 8 / 2;
+		dst = (signed short *)dst_channels[channel].area.addr +
+			dst_channels[channel].area.first / 8 / 2;
+		src_step = src_channels[channel].area.step / 8 / 2;
+		dst_step = dst_channels[channel].area.step / 8 / 2;
 		src_frames1 = src_frames;
 		dst_frames1 = dst_frames;
 		while (dst_frames1 > 0) {
 			S1 = S2;
 			if (src_frames1-- > 0) {
-				goto *get;
-#define GET_S16_END after_get
-#include "plugin_ops.h"
-#undef GET_S16_END
-			after_get:
-				S2 = sample;
+				S1 = *src;
 				src += src_step;
 			}
 			if (pos & ~R_MASK) {
@@ -201,12 +171,7 @@ static void resample_shrink(struct snd_pcm_plugin *plugin,
 					val = -32768;
 				else if (val > 32767)
 					val = 32767;
-				sample = val;
-				goto *put;
-#define PUT_S16_END after_put
-#include "plugin_ops.h"
-#undef PUT_S16_END
-			after_put:
+				*dst = val;
 				dst += dst_step;
 				dst_frames1--;
 			}
@@ -346,8 +311,8 @@ int snd_pcm_plugin_build_rate(struct snd_pcm_substream *plug,
 
 	snd_assert(src_format->channels == dst_format->channels, return -ENXIO);
 	snd_assert(src_format->channels > 0, return -ENXIO);
-	snd_assert(snd_pcm_format_linear(src_format->format) != 0, return -ENXIO);
-	snd_assert(snd_pcm_format_linear(dst_format->format) != 0, return -ENXIO);
+	snd_assert(src_format->format == SNDRV_PCM_FORMAT_S16, return -ENXIO);
+	snd_assert(dst_format->format == SNDRV_PCM_FORMAT_S16, return -ENXIO);
 	snd_assert(src_format->rate != dst_format->rate, return -ENXIO);
 
 	err = snd_pcm_plugin_build(plug, "rate conversion",
@@ -358,11 +323,6 @@ int snd_pcm_plugin_build_rate(struct snd_pcm_substream *plug,
 	if (err < 0)
 		return err;
 	data = (struct rate_priv *)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->put >= 0 && data->put < 4*2*2, return -EINVAL);
-
 	if (src_format->rate < dst_format->rate) {
 		data->pitch = ((src_format->rate << SHIFT) + (dst_format->rate >> 1)) / dst_format->rate;
 		data->func = resample_expand;

sound/core/oss/route.c

 /*
- *  Attenuated route Plug-In
+ *  Route Plug-In
  *  Copyright (c) 2000 by Abramo Bagnara <abramo@alsa-project.org>
  *
  *
@@ -29,496 +29,82 @@
 #include <sound/pcm.h>
 #include "pcm_plugin.h"
 
-/* The best possible hack to support missing optimization in gcc 2.7.2.3 */
-#if ROUTE_PLUGIN_RESOLUTION & (ROUTE_PLUGIN_RESOLUTION - 1) != 0
-#define div(a) a /= ROUTE_PLUGIN_RESOLUTION
-#elif ROUTE_PLUGIN_RESOLUTION == 16
-#define div(a) a >>= 4
-#else
-#error "Add some code here"
-#endif
-
-struct ttable_dst;
-
-typedef void (*route_channel_f)(struct snd_pcm_plugin *plugin,
-				const struct snd_pcm_plugin_channel *src_channels,
-				struct snd_pcm_plugin_channel *dst_channel,
-				struct ttable_dst *ttable, snd_pcm_uframes_t frames);
-
-struct ttable_src {
-	int channel;
-	int as_int;
-};
-
-struct ttable_dst {
-	int att;	/* Attenuated */
-	unsigned int nsrcs;
-	struct ttable_src *srcs;
-	route_channel_f func;
-};
-
-struct route_priv {
-	enum {R_UINT32=0, R_UINT64=1} sum_type;
-	int get, put;
-	int conv;
-	int src_sample_size;
-	struct ttable_dst ttable[0];
-};
-
-union sum {
-	u_int32_t as_uint32;
-	u_int64_t as_uint64;
-};
-
-
-static void route_to_channel_from_zero(struct snd_pcm_plugin *plugin,
-				       const struct snd_pcm_plugin_channel *src_channels,
-				       struct snd_pcm_plugin_channel *dst_channel,
-				       struct ttable_dst *ttable,
-				       snd_pcm_uframes_t frames)
+static void zero_areas(struct snd_pcm_plugin_channel *dvp, int ndsts,
+		       snd_pcm_uframes_t frames, int format)
 {
-	if (dst_channel->wanted)
-		snd_pcm_area_silence(&dst_channel->area, 0, frames, plugin->dst_format.format);
-	dst_channel->enabled = 0;
-}
-
-static void route_to_channel_from_one(struct snd_pcm_plugin *plugin,
-				      const struct snd_pcm_plugin_channel *src_channels,
-				      struct snd_pcm_plugin_channel *dst_channel,
-				      struct ttable_dst *ttable,
-				      snd_pcm_uframes_t frames)
-{
-#define CONV_LABELS
-#include "plugin_ops.h"
-#undef CONV_LABELS
-	struct route_priv *data = (struct route_priv *)plugin->extra_data;
-	void *conv;
-	const struct snd_pcm_plugin_channel *src_channel = NULL;
-	unsigned int srcidx;
-	char *src, *dst;
-	int src_step, dst_step;
-	for (srcidx = 0; srcidx < ttable->nsrcs; ++srcidx) {
-		src_channel = &src_channels[ttable->srcs[srcidx].channel];
-		if (src_channel->area.addr != NULL)
-			break;
-	}
-	if (srcidx == ttable->nsrcs) {
-		route_to_channel_from_zero(plugin, src_channels, dst_channel, ttable, frames);
-		return;
-	}
-
-	dst_channel->enabled = 1;
-	conv = conv_labels[data->conv];
-	src = src_channel->area.addr + src_channel->area.first / 8;
-	src_step = src_channel->area.step / 8;
-	dst = dst_channel->area.addr + dst_channel->area.first / 8;
-	dst_step = dst_channel->area.step / 8;
-	while (frames-- > 0) {
-		goto *conv;
-#define CONV_END after
-#include "plugin_ops.h"
-#undef CONV_END
-	after:
-		src += src_step;
-		dst += dst_step;
+	int dst = 0;
+	for (; dst < ndsts; ++dst) {
+		if (dvp->wanted)
+			snd_pcm_area_silence(&dvp->area, 0, frames, format);
+		dvp->enabled = 0;
+		dvp++;
 	}
 }
 
-static void route_to_channel(struct snd_pcm_plugin *plugin,
-			     const struct snd_pcm_plugin_channel *src_channels,
+static inline void copy_area(const struct snd_pcm_plugin_channel *src_channel,
 			     struct snd_pcm_plugin_channel *dst_channel,
-			     struct ttable_dst *ttable, snd_pcm_uframes_t frames)
+			     snd_pcm_uframes_t frames, int format)
 {
-#define GET_U_LABELS
-#define PUT_U32_LABELS
-#include "plugin_ops.h"
-#undef GET_U_LABELS
-#undef PUT_U32_LABELS
-	static void *zero_labels[2] = { &&zero_int32, &&zero_int64 };
-	/* sum_type att */
-	static void *add_labels[2 * 2] = { &&add_int32_noatt, &&add_int32_att,
-				    &&add_int64_noatt, &&add_int64_att,
-	};
-	/* sum_type att shift */
-	static void *norm_labels[2 * 2 * 4] = { NULL,
-					 &&norm_int32_8_noatt,
-					 &&norm_int32_16_noatt,
-					 &&norm_int32_24_noatt,
-					 NULL,
-					 &&norm_int32_8_att,
-					 &&norm_int32_16_att,
-					 &&norm_int32_24_att,
-					 &&norm_int64_0_noatt,
-					 &&norm_int64_8_noatt,
-					 &&norm_int64_16_noatt,
-					 &&norm_int64_24_noatt,
-					 &&norm_int64_0_att,
-					 &&norm_int64_8_att,
-					 &&norm_int64_16_att,
-					 &&norm_int64_24_att,
-	};
-	struct route_priv *data = (struct route_priv *)plugin->extra_data;
-	void *zero, *get, *add, *norm, *put_u32;
-	int nsrcs = ttable->nsrcs;
-	char *dst;
-	int dst_step;
-	char *srcs[nsrcs];
-	int src_steps[nsrcs];
-	struct ttable_src src_tt[nsrcs];
-	u_int32_t sample = 0;
-	int srcidx, srcidx1 = 0;
-	for (srcidx = 0; srcidx < nsrcs; ++srcidx) {
-		const struct snd_pcm_plugin_channel *src_channel = &src_channels[ttable->srcs[srcidx].channel];
-		if (!src_channel->enabled)
-			continue;
-		srcs[srcidx1] = src_channel->area.addr + src_channel->area.first / 8;
-		src_steps[srcidx1] = src_channel->area.step / 8;
-		src_tt[srcidx1] = ttable->srcs[srcidx];
-		srcidx1++;
-	}
-	nsrcs = srcidx1;
-	if (nsrcs == 0) {
-		route_to_channel_from_zero(plugin, src_channels, dst_channel, ttable, frames);
-		return;
-	} else if (nsrcs == 1 && src_tt[0].as_int == ROUTE_PLUGIN_RESOLUTION) {
-		route_to_channel_from_one(plugin, src_channels, dst_channel, ttable, frames);
-		return;
-	}
-
 	dst_channel->enabled = 1;
-	zero = zero_labels[data->sum_type];
-	get = get_u_labels[data->get];
-	add = add_labels[data->sum_type * 2 + ttable->att];
-	norm = norm_labels[data->sum_type * 8 + ttable->att * 4 + 4 - data->src_sample_size];
-	put_u32 = put_u32_labels[data->put];
-	dst = dst_channel->area.addr + dst_channel->area.first / 8;
-	dst_step = dst_channel->area.step / 8;
-
-	while (frames-- > 0) {
-		struct ttable_src *ttp = src_tt;
-		union sum sum;
-
-		/* Zero sum */
-		goto *zero;
-	zero_int32:
-		sum.as_uint32 = 0;
-		goto zero_end;
-	zero_int64: 
-		sum.as_uint64 = 0;
-		goto zero_end;
-	zero_end:
-		for (srcidx = 0; srcidx < nsrcs; ++srcidx) {
-			char *src = srcs[srcidx];
-			
-			/* Get sample */
-			goto *get;
-#define GET_U_END after_get
-#include "plugin_ops.h"
-#undef GET_U_END
-		after_get:
-
-			/* Sum */
-			goto *add;
-		add_int32_att:
-			sum.as_uint32 += sample * ttp->as_int;
-			goto after_sum;
-		add_int32_noatt:
-			if (ttp->as_int)
-				sum.as_uint32 += sample;
-			goto after_sum;
-		add_int64_att:
-			sum.as_uint64 += (u_int64_t) sample * ttp->as_int;
-			goto after_sum;
-		add_int64_noatt:
-			if (ttp->as_int)
-				sum.as_uint64 += sample;
-			goto after_sum;
-		after_sum:
-			srcs[srcidx] += src_steps[srcidx];
-			ttp++;
-		}
-		
-		/* Normalization */
-		goto *norm;
-	norm_int32_8_att:
-		sum.as_uint64 = sum.as_uint32;
-	norm_int64_8_att:
-		sum.as_uint64 <<= 8;
-	norm_int64_0_att:
-		div(sum.as_uint64);
-		goto norm_int;
-
-	norm_int32_16_att:
-		sum.as_uint64 = sum.as_uint32;
-	norm_int64_16_att:
-		sum.as_uint64 <<= 16;
-		div(sum.as_uint64);
-		goto norm_int;
-
-	norm_int32_24_att:
-		sum.as_uint64 = sum.as_uint32;
-	norm_int64_24_att:
-		sum.as_uint64 <<= 24;
-		div(sum.as_uint64);
-		goto norm_int;
-
-	norm_int32_8_noatt:
-		sum.as_uint64 = sum.as_uint32;
-	norm_int64_8_noatt:
-		sum.as_uint64 <<= 8;
-		goto norm_int;
-
-	norm_int32_16_noatt:
-		sum.as_uint64 = sum.as_uint32;
-	norm_int64_16_noatt:
-		sum.as_uint64 <<= 16;
-		goto norm_int;
-
-	norm_int32_24_noatt:
-		sum.as_uint64 = sum.as_uint32;
-	norm_int64_24_noatt:
-		sum.as_uint64 <<= 24;
-		goto norm_int;
-
-	norm_int64_0_noatt:
-	norm_int:
-		if (sum.as_uint64 > (u_int32_t)0xffffffff)
-			sample = (u_int32_t)0xffffffff;
-		else
-			sample = sum.as_uint64;
-		goto after_norm;
-
-	after_norm:
-		
-		/* Put sample */
-		goto *put_u32;
-#define PUT_U32_END after_put_u32
-#include "plugin_ops.h"
-#undef PUT_U32_END
-	after_put_u32:
-		
-		dst += dst_step;
-	}
-}
-
-static int route_src_channels_mask(struct snd_pcm_plugin *plugin,
-				   unsigned long *dst_vmask,
-				   unsigned long **src_vmask)
-{
-	struct route_priv *data = (struct route_priv *)plugin->extra_data;
-	int schannels = plugin->src_format.channels;
-	int dchannels = plugin->dst_format.channels;
-	unsigned long *vmask = plugin->src_vmask;
-	int channel;
-	struct ttable_dst *dp = data->ttable;
-	bitmap_zero(vmask, schannels);
-	for (channel = 0; channel < dchannels; channel++, dp++) {
-		unsigned int src;
-		struct ttable_src *sp;
-		if (!test_bit(channel, dst_vmask))
-			continue;
-		sp = dp->srcs;
-		for (src = 0; src < dp->nsrcs; src++, sp++)
-			set_bit(sp->channel, vmask);
-	}
-	*src_vmask = vmask;
-	return 0;
-}
-
-static int route_dst_channels_mask(struct snd_pcm_plugin *plugin,
-				   unsigned long *src_vmask,
-				   unsigned long **dst_vmask)
-{
-	struct route_priv *data = (struct route_priv *)plugin->extra_data;
-	int dchannels = plugin->dst_format.channels;
-	unsigned long *vmask = plugin->dst_vmask;
-	int channel;
-	struct ttable_dst *dp = data->ttable;
-	bitmap_zero(vmask, dchannels);
-	for (channel = 0; channel < dchannels; channel++, dp++) {
-		unsigned int src;
-		struct ttable_src *sp;
-		sp = dp->srcs;
-		for (src = 0; src < dp->nsrcs; src++, sp++) {
-			if (test_bit(sp->channel, src_vmask)) {
-				set_bit(channel, vmask);
-				break;
-			}
-		}
-	}
-	*dst_vmask = vmask;
-	return 0;
-}
-
-static void route_free(struct snd_pcm_plugin *plugin)
-{
-	struct route_priv *data = (struct route_priv *)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(struct snd_pcm_plugin *plugin, 
-			     const int *src_ttable)
-{
-	struct route_priv *data;
-	unsigned int src_channel, dst_channel;
-	const int *sptr;
-	struct ttable_dst *dptr;
-	if (src_ttable == NULL)
-		return 0;
-	data = (struct route_priv *)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) {
-		int t = 0;
-		int att = 0;
-		int nsrcs = 0;
-		struct ttable_src 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;
+	snd_pcm_area_copy(&src_channel->area, 0, &dst_channel->area, 0, frames, format);
 }
 
 static snd_pcm_sframes_t route_transfer(struct snd_pcm_plugin *plugin,
-			      const struct snd_pcm_plugin_channel *src_channels,
-			      struct snd_pcm_plugin_channel *dst_channels,
-			      snd_pcm_uframes_t frames)
+					const struct snd_pcm_plugin_channel *src_channels,
+					struct snd_pcm_plugin_channel *dst_channels,
+					snd_pcm_uframes_t frames)
 {
-	struct route_priv *data;
-	int src_nchannels, dst_nchannels;
-	int dst_channel;
-	struct ttable_dst *ttp;
+	int nsrcs, ndsts, dst;
 	struct snd_pcm_plugin_channel *dvp;
+	int format;
 
 	snd_assert(plugin != NULL && src_channels != NULL && dst_channels != NULL, return -ENXIO);
 	if (frames == 0)
 		return 0;
-	data = (struct route_priv *)plugin->extra_data;
 
-	src_nchannels = plugin->src_format.channels;
-	dst_nchannels = plugin->dst_format.channels;
+	nsrcs = plugin->src_format.channels;
+	ndsts = 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);
+	format = plugin->dst_format.format;
+	dvp = dst_channels;
+	if (nsrcs <= 1) {
+		/* expand to all channels */
+		for (dst = 0; dst < ndsts; ++dst) {
+			copy_area(src_channels, dvp, frames, format);
+			dvp++;
 		}
+		return frames;
 	}
-#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);
+	for (dst = 0; dst < ndsts && dst < nsrcs; ++dst) {
+		copy_area(src_channels, dvp, frames, format);
 		dvp++;
-		ttp++;
+		src_channels++;
 	}
+	if (dst < ndsts)
+		zero_areas(dvp, ndsts - dst, frames, format);
 	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(struct snd_pcm_substream *plug,
 			       struct snd_pcm_plugin_format *src_format,
 			       struct snd_pcm_plugin_format *dst_format,
-			       int *ttable,
 			       struct snd_pcm_plugin **r_plugin)
 {
-	struct route_priv *data;
 	struct snd_pcm_plugin *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);
+	snd_assert(src_format->format == dst_format->format, return -ENXIO);
 
-	err = snd_pcm_plugin_build(plug, "attenuated route conversion",
-				   src_format, dst_format,
-				   sizeof(struct route_priv) +
-				   sizeof(data->ttable[0]) * dst_format->channels,
-				   &plugin);
+	err = snd_pcm_plugin_build(plug, "route conversion",
+				   src_format, dst_format, 0, &plugin);
 	if (err < 0)
 		return err;
 
-	data = (struct route_priv *)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;
 }