[ALSA] Clean up codes

ALSA<-OSS emulation
Got rid of the unused float codes (the legacy code for sharing with ALSA
library).
Add assert to the invalid conversion indices which results in oops
(just to be sure).
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/core/oss/mulaw.c

@@ -301,6 +301,7 @@ int snd_pcm_plugin_build_mulaw(snd_pcm_plug_t *plug,
 	data = (mulaw_t*)plugin->extra_data;
 	data->func = func;
 	data->conv = getput_index(format->format);
+	snd_assert(data->conv >= 0 && data->conv < 4*2*2, return -EINVAL);
 	plugin->transfer = mulaw_transfer;
 	*r_plugin = plugin;
 	return 0;

sound/core/oss/pcm_plugin.c

@@ -385,7 +385,7 @@ int snd_pcm_plug_format_plugins(snd_pcm_plug_t *plug,
 	snd_pcm_plugin_format_t srcformat;
 	int src_access, dst_access;
 	snd_pcm_plugin_t *plugin = NULL;
-	int err, first;
+	int err;
 	int stream = snd_pcm_plug_stream(plug);
 	int slave_interleaved = (params_channels(slave_params) == 1 ||
 				 params_access(slave_params) == SNDRV_PCM_ACCESS_RW_INTERLEAVED);
@@ -437,7 +437,6 @@ int snd_pcm_plug_format_plugins(snd_pcm_plug_t *plug,
 			tmpformat.format = dstformat.format;
 		else
 			tmpformat.format = SNDRV_PCM_FORMAT_S16;
-		first = plugin == NULL;
 		switch (srcformat.format) {
 		case SNDRV_PCM_FORMAT_MU_LAW:
 			err = snd_pcm_plugin_build_mulaw(plug,

sound/core/oss/pcm_plugin.h

@@ -168,7 +168,6 @@ int snd_pcm_plug_alloc(snd_pcm_plug_t *plug, snd_pcm_uframes_t frames);
 snd_pcm_sframes_t snd_pcm_plug_client_size(snd_pcm_plug_t *handle, snd_pcm_uframes_t drv_size);
 snd_pcm_sframes_t snd_pcm_plug_slave_size(snd_pcm_plug_t *handle, snd_pcm_uframes_t clt_size);
 
-#define ROUTE_PLUGIN_USE_FLOAT 0
 #define FULL ROUTE_PLUGIN_RESOLUTION
 #define HALF ROUTE_PLUGIN_RESOLUTION / 2
 typedef int route_ttable_entry_t;

sound/core/oss/rate.c

@@ -355,7 +355,9 @@ int snd_pcm_plugin_build_rate(snd_pcm_plug_t *plug,
 		return err;
 	data = (rate_t *)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;

sound/core/oss/route.c

@@ -46,9 +46,6 @@ typedef void (*route_channel_f)(snd_pcm_plugin_t *plugin,
 typedef struct {
 	int channel;
 	int as_int;
-#if ROUTE_PLUGIN_USE_FLOAT
-	float as_float;
-#endif
 } ttable_src_t;
 
 struct ttable_dst {
@@ -59,7 +56,7 @@ struct ttable_dst {
 };
 
 struct route_private_data {
-	enum {R_UINT32=0, R_UINT64=1, R_FLOAT=2} sum_type;
+	enum {R_UINT32=0, R_UINT64=1} sum_type;
 	int get, put;
 	int conv;
 	int src_sample_size;
@@ -69,9 +66,6 @@ struct route_private_data {
 typedef union {
 	u_int32_t as_uint32;
 	u_int64_t as_uint64;
-#if ROUTE_PLUGIN_USE_FLOAT
-	float as_float;
-#endif
 } sum_t;
 
 
@@ -136,20 +130,13 @@ static void route_to_channel(snd_pcm_plugin_t *plugin,
 #include "plugin_ops.h"
 #undef GET_U_LABELS
 #undef PUT_U32_LABELS
-	static void *zero_labels[3] = { &&zero_int32, &&zero_int64,
-#if ROUTE_PLUGIN_USE_FLOAT
-				 &&zero_float
-#endif
-	};
+	static void *zero_labels[2] = { &&zero_int32, &&zero_int64 };
 	/* sum_type att */
-	static void *add_labels[3 * 2] = { &&add_int32_noatt, &&add_int32_att,
+	static void *add_labels[2 * 2] = { &&add_int32_noatt, &&add_int32_att,
 				    &&add_int64_noatt, &&add_int64_att,
-#if ROUTE_PLUGIN_USE_FLOAT
-				    &&add_float_noatt, &&add_float_att
-#endif
 	};
 	/* sum_type att shift */
-	static void *norm_labels[3 * 2 * 4] = { NULL,
+	static void *norm_labels[2 * 2 * 4] = { NULL,
 					 &&norm_int32_8_noatt,
 					 &&norm_int32_16_noatt,
 					 &&norm_int32_24_noatt,
@@ -165,16 +152,6 @@ static void route_to_channel(snd_pcm_plugin_t *plugin,
 					 &&norm_int64_8_att,
 					 &&norm_int64_16_att,
 					 &&norm_int64_24_att,
-#if ROUTE_PLUGIN_USE_FLOAT
-					 &&norm_float_0,
-					 &&norm_float_8,
-					 &&norm_float_16,
-					 &&norm_float_24,
-					 &&norm_float_0,
-					 &&norm_float_8,
-					 &&norm_float_16,
-					 &&norm_float_24,
-#endif
 	};
 	route_t *data = (route_t *)plugin->extra_data;
 	void *zero, *get, *add, *norm, *put_u32;
@@ -225,11 +202,6 @@ static void route_to_channel(snd_pcm_plugin_t *plugin,
 	zero_int64: 
 		sum.as_uint64 = 0;
 		goto zero_end;
-#if ROUTE_PLUGIN_USE_FLOAT
-	zero_float:
-		sum.as_float = 0.0;
-		goto zero_end;
-#endif
 	zero_end:
 		for (srcidx = 0; srcidx < nsrcs; ++srcidx) {
 			char *src = srcs[srcidx];
@@ -257,15 +229,6 @@ static void route_to_channel(snd_pcm_plugin_t *plugin,
 			if (ttp->as_int)
 				sum.as_uint64 += sample;
 			goto after_sum;
-#if ROUTE_PLUGIN_USE_FLOAT
-		add_float_att:
-			sum.as_float += sample * ttp->as_float;
-			goto after_sum;
-		add_float_noatt:
-			if (ttp->as_int)
-				sum.as_float += sample;
-			goto after_sum;
-#endif
 		after_sum:
 			srcs[srcidx] += src_steps[srcidx];
 			ttp++;
@@ -321,25 +284,6 @@ static void route_to_channel(snd_pcm_plugin_t *plugin,
 			sample = sum.as_uint64;
 		goto after_norm;
 
-#if ROUTE_PLUGIN_USE_FLOAT
-	norm_float_8:
-		sum.as_float *= 1 << 8;
-		goto norm_float;
-	norm_float_16:
-		sum.as_float *= 1 << 16;
-		goto norm_float;
-	norm_float_24:
-		sum.as_float *= 1 << 24;
-		goto norm_float;
-	norm_float_0:
-	norm_float:
-		sum.as_float = floor(sum.as_float + 0.5);
-		if (sum.as_float > (u_int32_t)0xffffffff)
-			sample = (u_int32_t)0xffffffff;
-		else
-			sample = sum.as_float;
-		goto after_norm;
-#endif
 	after_norm:
 		
 		/* Put sample */
@@ -433,13 +377,7 @@ static int route_load_ttable(snd_pcm_plugin_t *plugin,
 			snd_assert(*sptr >= 0 || *sptr <= FULL, return -ENXIO);
 			if (*sptr != 0) {
 				srcs[nsrcs].channel = src_channel;
-#if ROUTE_PLUGIN_USE_FLOAT
-				/* Also in user space for non attenuated */
-				srcs[nsrcs].as_int = (*sptr == FULL ? ROUTE_PLUGIN_RESOLUTION : 0);
-				srcs[nsrcs].as_float = *sptr;
-#else
 				srcs[nsrcs].as_int = *sptr;
-#endif
 				if (*sptr != FULL)
 					att = 1;
 				t += *sptr;
@@ -558,17 +496,15 @@ int snd_pcm_plugin_build_route(snd_pcm_plug_t *plug,
 	data = (route_t *) 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 ROUTE_PLUGIN_USE_FLOAT
-	data->sum_type = R_FLOAT;
-#else
 	if (snd_pcm_format_width(src_format->format) == 32)
 		data->sum_type = R_UINT64;
 	else
 		data->sum_type = R_UINT32;
-#endif
 	data->src_sample_size = snd_pcm_format_width(src_format->format) / 8;
 
 	if ((err = route_load_ttable(plugin, ttable)) < 0) {