1 files changed, 269 insertions, 0 deletions
diff --git a/examples/sndcardparser/sample_sndcardparser.c b/examples/sndcardparser/sample_sndcardparser.c
new file mode 100644
index 0000000..90e3d12
--- /dev/null
+++ b/examples/sndcardparser/sample_sndcardparser.c
@@ -0,0 +1,269 @@
+/*
+** Copyright (c) 2021, The Linux Foundation. All rights reserved.
+**
+** 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 Linux Foundation 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 "AS IS" AND ANY EXPRESS OR IMPLIED
+** WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+** ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+** 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 <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
+
+#define VIRTUAL_SND_CARD_ID 100
+#define MAX_PATH 256
+#define BUF_SIZE 1024
+
+enum snd_node_type {
+    NODE_TYPE_HW = 0,
+    NODE_TYPE_PLUGIN,
+    NODE_TYPE_INVALID,
+};
+
+enum {
+    NODE_PCM,
+    NODE_COMPR,
+    NODE_MIXER,
+    NODE_MAX,
+};
+
+struct snd_node_ops {
+    /** Function pointer to get card definition */
+    void* (*open_card)(unsigned int card);
+    /** Function pointer to release card definition */
+    void (*close_card)(void *card);
+    /** Get interger type properties from device definition */
+    int (*get_int)(void *node, const char *prop, int *val);
+    /** Get string type properties from device definition */
+    int (*get_str)(void *node, const char *prop, char **val);
+    /** Function pointer to get mixer definition */
+    void* (*get_mixer)(void *card);
+    /** Function pointer to get PCM definition */
+    void* (*get_pcm)(void *card, unsigned int id);
+    /** Function pointer to get COMPRESS definition */
+    void* (*get_compress)(void *card, unsigned int id);
+};
+
+struct snd_dev_def {
+    unsigned int device;
+    int type;
+    const char *name;
+    const char *so_name;
+    int playback; //used only for pcm node
+    int capture;  //used only for pcm node
+    /* add custom props here */
+};
+
+struct snd_dev_def_card {
+    unsigned int card;
+    char *name;
+
+    /* child device details */
+    int num_pcm_nodes;
+    struct snd_dev_def *pcm_dev_def;
+
+    struct snd_dev_def *mixer_dev_def;
+};
+
+struct snd_dev_def pcm_devs[] = {
+    {100, NODE_TYPE_PLUGIN, "PCM100", "libtinyalsav2_example_plugin_pcm.so", 1, 0},
+    /* Add other plugin info here */
+};
+
+struct snd_dev_def mixer_dev =
+    {VIRTUAL_SND_CARD_ID, NODE_TYPE_PLUGIN, "virtual-snd-card", "libtinyalsav2_example_plugin_mixer.so", 0, 0};
+
+void *snd_card_def_open_card(unsigned int card)
+{
+    struct snd_dev_def_card *card_def = NULL;
+    struct snd_dev_def *pcm_dev_def = NULL;
+    struct snd_dev_def *mixer_dev_def = NULL;
+    int num_pcm = ARRAY_SIZE(pcm_devs);
+    int i;
+
+    if (card != VIRTUAL_SND_CARD_ID)
+        return NULL;
+
+    card_def = calloc(1, sizeof(struct snd_dev_def_card));
+    if (!card_def)
+        return card_def;
+
+    card_def->card = card;
+    card_def->name = strdup("virtual-snd-card");
+
+    /* fill pcm device node info */
+    card_def->num_pcm_nodes = num_pcm;
+    pcm_dev_def = calloc(num_pcm, sizeof(struct snd_dev_def));
+    if (!pcm_dev_def)
+        goto free_card_def;
+
+    for (i = 0; i < num_pcm; i++)
+        memcpy(&pcm_dev_def[i], &pcm_devs[i], sizeof(struct snd_dev_def));
+
+    card_def->pcm_dev_def = pcm_dev_def;
+
+    /* fill mixer device node info */
+    mixer_dev_def = calloc(1, sizeof(struct snd_dev_def));
+    if (!mixer_dev_def)
+        goto free_pcm_dev;
+
+    memcpy(mixer_dev_def, &mixer_dev, sizeof(struct snd_dev_def));
+
+    card_def->mixer_dev_def = mixer_dev_def;
+    return card_def;
+free_pcm_dev:
+    free(pcm_dev_def);
+free_card_def:
+    free(card_def->name);
+    free(card_def);
+    return NULL;
+}
+
+void snd_card_def_close_card(void *card_node)
+{
+    struct snd_dev_def_card *defs = (struct snd_dev_def_card *)card_node;
+    struct snd_dev_def *pcm_dev_def = NULL;
+    struct snd_dev_def *mixer_dev_def = NULL;
+
+    if (!defs)
+        return;
+
+    pcm_dev_def = defs->pcm_dev_def;
+    if (pcm_dev_def)
+        free(pcm_dev_def);
+
+    mixer_dev_def = defs->mixer_dev_def;
+    if (!mixer_dev_def)
+         goto free_defs;
+
+    free(mixer_dev_def);
+free_defs:
+    free(defs->name);
+    free(defs);
+}
+
+void *snd_card_def_get_node(void *card_node, unsigned int id, int type)
+{
+    struct snd_dev_def_card *card_def = (struct snd_dev_def_card *)card_node;
+    struct snd_dev_def *dev_def = NULL;
+    int i;
+
+    if (!card_def)
+        return NULL;
+
+    if (type >= NODE_MAX)
+        return NULL;
+
+    if (type == NODE_MIXER)
+        return card_def->mixer_dev_def;
+
+    if (type == NODE_PCM)
+        dev_def = card_def->pcm_dev_def;
+
+    for (i = 0; i < card_def->num_pcm_nodes; i++) {
+        if (dev_def[i].device == id) {
+            return &dev_def[i];
+        }
+    }
+
+    return NULL;
+}
+
+int snd_card_def_get_int(void *node, const char *prop, int *val)
+{
+    struct snd_dev_def *dev_def = (struct snd_dev_def *)node;
+    int ret = -EINVAL;
+
+    if (!dev_def || !prop || !val)
+        return ret;
+
+    if (!strcmp(prop, "type")) {
+        *val = dev_def->type;
+        return 0;
+    } else if (!strcmp(prop, "id")) {
+        *val = dev_def->device;
+        return 0;
+    } else if (!strcmp(prop, "playback")) {
+        *val = dev_def->playback;
+        return 0;
+    } else if (!strcmp(prop, "capture")) {
+        *val = dev_def->capture;
+        return 0;
+    }
+
+    return ret;
+}
+
+int snd_card_def_get_str(void *node, const char *prop, char **val)
+{
+    struct snd_dev_def *dev_def = (struct snd_dev_def *)node;
+    int ret = -EINVAL;
+
+    if (!dev_def || !prop)
+        return ret;
+
+    if (!strcmp(prop, "so-name")) {
+        if (dev_def->so_name) {
+            *val = (char *)dev_def->so_name;
+            return 0;
+        }
+    }
+
+    if (!strcmp(prop, "name")) {
+        if (dev_def->name) {
+            *val = (char *)dev_def->name;
+            return 0;
+        }
+    }
+
+    return ret;
+}
+
+void *snd_card_def_get_pcm(void *card_node, unsigned int id)
+{
+    return snd_card_def_get_node(card_node, id, NODE_PCM);
+}
+
+void *snd_card_def_get_compress(void *card_node, unsigned int id)
+{
+    return snd_card_def_get_node(card_node, id, NODE_COMPR);
+}
+
+void *snd_card_def_get_mixer(void *card_node)
+{
+    return snd_card_def_get_node(card_node, 1, NODE_MIXER);
+}
+
+struct snd_node_ops snd_card_ops = {
+    .open_card = snd_card_def_open_card,
+    .close_card = snd_card_def_close_card,
+    .get_int = snd_card_def_get_int,
+    .get_str = snd_card_def_get_str,
+    .get_pcm = snd_card_def_get_pcm,
+    .get_compress = snd_card_def_get_compress,
+    .get_mixer = snd_card_def_get_mixer,
+};