Add tinypcminfo utility

This uses the new pcm_params_* API.

Android.mk

@@ -36,3 +36,12 @@ LOCAL_SHARED_LIBRARIES:= libcutils libutils libtinyalsa
 LOCAL_MODULE_TAGS := optional
 
 include $(BUILD_EXECUTABLE)
+
+include $(CLEAR_VARS)
+LOCAL_C_INCLUDES:= external/tinyalsa/include
+LOCAL_SRC_FILES:= tinypcminfo.c
+LOCAL_MODULE := tinypcminfo
+LOCAL_SHARED_LIBRARIES:= libcutils libutils libtinyalsa
+LOCAL_MODULE_TAGS := optional
+
+include $(BUILD_EXECUTABLE)

Makefile

@@ -4,7 +4,7 @@ OBJECTS = mixer.o pcm.o
 LIB = libtinyalsa.so
 CROSS_COMPILE =
 
-all: $(LIB) tinyplay tinycap tinymix
+all: $(LIB) tinyplay tinycap tinymix tinypcminfo
 
 tinyplay: $(LIB) tinyplay.o
 	$(CROSS_COMPILE)gcc tinyplay.o -L. -ltinyalsa -o tinyplay
@@ -15,6 +15,9 @@ tinycap: $(LIB) tinycap.o
 tinymix: $(LIB) tinymix.o
 	$(CROSS_COMPILE)gcc tinymix.o -L. -ltinyalsa -o tinymix
 
+tinypcminfo: $(LIB) tinypcminfo.o
+	$(CROSS_COMPILE)gcc tinypcminfo.o -L. -ltinyalsa -o tinypcminfo
+
 $(LIB): $(OBJECTS)
 	$(CROSS_COMPILE)gcc -shared $(OBJECTS) -o $(LIB)
 

tinypcminfo.c

@@ -0,0 +1,97 @@
+/* tinypcminfo.c
+**
+** Copyright 2012, The Android Open Source Project
+**
+** Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are met:
+**     * Redistributions of source code must retain the above copyright
+**       notice, this list of conditions and the following disclaimer.
+**     * Redistributions in binary form must reproduce the above copyright
+**       notice, this list of conditions and the following disclaimer in the
+**       documentation and/or other materials provided with the distribution.
+**     * Neither the name of The Android Open Source Project nor the names of
+**       its contributors may be used to endorse or promote products derived
+**       from this software without specific prior written permission.
+**
+** THIS SOFTWARE IS PROVIDED BY The Android Open Source Project ``AS IS'' AND
+** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+** ARE DISCLAIMED. IN NO EVENT SHALL The Android Open Source Project BE LIABLE
+** FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+** SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+** CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+** OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+** DAMAGE.
+*/
+
+#include <tinyalsa/asoundlib.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int main(int argc, char **argv)
+{
+    unsigned int device = 0;
+    unsigned int card = 0;
+    int i;
+
+    if (argc < 3) {
+        fprintf(stderr, "Usage: %s -D card -d device\n", argv[0]);
+        return 1;
+    }
+
+    /* parse command line arguments */
+    argv += 1;
+    while (*argv) {
+        if (strcmp(*argv, "-D") == 0) {
+            argv++;
+            if (*argv)
+                card = atoi(*argv);
+        }
+        if (strcmp(*argv, "-d") == 0) {
+            argv++;
+            if (*argv)
+                device = atoi(*argv);
+        }
+        if (*argv)
+            argv++;
+    }
+
+    printf("Info for card %d, device %d:\n", card, device);
+
+    for (i = 0; i < 2; i++) {
+        struct pcm_params *params;
+        unsigned int min;
+        unsigned int max;
+
+        printf("\nPCM %s:\n", i == 0 ? "out" : "in");
+
+        params = pcm_params_get(card, device, i == 0 ? PCM_OUT : PCM_IN);
+        if (params == NULL) {
+            printf("Device does not exist.\n");
+            continue;
+        }
+
+        min = pcm_params_get_min(params, PCM_PARAM_RATE);
+        max = pcm_params_get_max(params, PCM_PARAM_RATE);
+        printf("        Rate:\tmin=%uHz\tmax=%uHz\n", min, max);
+        min = pcm_params_get_min(params, PCM_PARAM_CHANNELS);
+        max = pcm_params_get_max(params, PCM_PARAM_CHANNELS);
+        printf("    Channels:\tmin=%u\t\tmax=%u\n", min, max);
+        min = pcm_params_get_min(params, PCM_PARAM_SAMPLE_BITS);
+        max = pcm_params_get_max(params, PCM_PARAM_SAMPLE_BITS);
+        printf(" Sample bits:\tmin=%u\t\tmax=%u\n", min, max);
+        min = pcm_params_get_min(params, PCM_PARAM_PERIOD_SIZE);
+        max = pcm_params_get_max(params, PCM_PARAM_PERIOD_SIZE);
+        printf(" Period size:\tmin=%u\t\tmax=%u\n", min, max);
+        min = pcm_params_get_min(params, PCM_PARAM_PERIODS);
+        max = pcm_params_get_max(params, PCM_PARAM_PERIODS);
+        printf("Period count:\tmin=%u\t\tmax=%u\n", min, max);
+
+        pcm_params_free(params);
+    }
+
+    return 0;
+}