File 0018-PCM-Add-the-missing-query_chmaps-for-route-plugin.patch of Package alsa

From a102028a5a747ecdf1d6fcd16aef0994477a951b Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Wed, 12 Sep 2012 15:09:57 +0200
Subject: [PATCH 18/30] PCM: Add the missing query_chmaps for route plugin

Also fix the channel count in get_chmap for route plugin.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 src/pcm/pcm_route.c |   24 +++++++++++++++++++-----
 1 file changed, 19 insertions(+), 5 deletions(-)

--- a/src/pcm/pcm_route.c
+++ b/src/pcm/pcm_route.c
@@ -67,6 +67,7 @@ typedef struct {
 	int use_getput;
 	unsigned int src_size;
 	snd_pcm_format_t dst_sfmt;
+	unsigned int nsrcs;
 	unsigned int ndsts;
 	snd_pcm_route_ttable_dst_t *dsts;
 } snd_pcm_route_params_t;
@@ -707,22 +708,23 @@ static snd_pcm_chmap_t *snd_pcm_route_ge
 {
 	snd_pcm_route_t *route = pcm->private_data;
 	snd_pcm_chmap_t *map, *slave_map;
-	unsigned int src, dst;
+	unsigned int src, dst, nsrcs;
 
 	slave_map = snd_pcm_generic_get_chmap(pcm);
 	if (!slave_map)
 		return NULL;
-	map = calloc(4, route->schannels + 1);
+	nsrcs = route->params.nsrcs;
+	map = calloc(4, nsrcs + 1);
 	if (!map) {
 		free(slave_map);
 		return NULL;
 	}
-	map->channels = route->schannels;
+	map->channels = nsrcs;
 	for (dst = 0; dst < route->params.ndsts; dst++) {
 		snd_pcm_route_ttable_dst_t *d = &route->params.dsts[dst];
 		for (src = 0; src < d->nsrcs; src++) {
 			int c = d->srcs[src].channel;
-			if (c < route->schannels && !map->pos[c])
+			if (c < nsrcs && !map->pos[c])
 				map->pos[c] = slave_map->pos[dst];
 		}
 	}
@@ -730,6 +732,17 @@ static snd_pcm_chmap_t *snd_pcm_route_ge
 	return map;
 }
 
+static snd_pcm_chmap_query_t **snd_pcm_route_query_chmaps(snd_pcm_t *pcm)
+{
+	snd_pcm_chmap_query_t **maps;
+	snd_pcm_chmap_t *map = snd_pcm_route_get_chmap(pcm);
+	if (!map)
+		return NULL;
+	maps = _snd_pcm_make_single_query_chmaps(map);
+	free(map);
+	return maps;
+}
+
 static void snd_pcm_route_dump(snd_pcm_t *pcm, snd_output_t *out)
 {
 	snd_pcm_route_t *route = pcm->private_data;
@@ -787,7 +800,7 @@ static const snd_pcm_ops_t snd_pcm_route
 	.async = snd_pcm_generic_async,
 	.mmap = snd_pcm_generic_mmap,
 	.munmap = snd_pcm_generic_munmap,
-	.query_chmaps = NULL, /* NYI */
+	.query_chmaps = snd_pcm_route_query_chmaps,
 	.get_chmap = snd_pcm_route_get_chmap,
 	.set_chmap = NULL, /* NYI */
 };
@@ -812,6 +825,7 @@ static int route_load_ttable(snd_pcm_rou
 		dmul = tt_ssize;
 	}
 	params->ndsts = dused;
+	params->nsrcs = sused;
 	dptr = calloc(dused, sizeof(*params->dsts));
 	if (!dptr)
 		return -ENOMEM;