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-rw-r--r--examples/sndcardparser/Android.bp7
-rw-r--r--examples/sndcardparser/sample_sndcardparser.c269
2 files changed, 276 insertions, 0 deletions
diff --git a/examples/sndcardparser/Android.bp b/examples/sndcardparser/Android.bp
new file mode 100644
index 0000000..9ca8812
--- /dev/null
+++ b/examples/sndcardparser/Android.bp
@@ -0,0 +1,7 @@
+cc_library {
+ name: "libsndcardparser_example",
+ vendor: true,
+ srcs: ["sample_sndcardparser.c"],
+ cflags: ["-Werror"],
+}
+
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,
+};
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 16:01:32 +0000