external: tinycompress: add support for compress plugins
Add plugin support to use vendor specific compress implementation
Bug: 166667071
Test: manual offload playback test
Test: cts AudioTrackOffloadTest
CRs-Fixed: 2563258
Change-Id: I71f588b9ed84b62d3b1b08dae7ce65f8fa649e6a
diff --git a/snd_utils.c b/snd_utils.c
new file mode 100644
index 0000000..2c244cc
--- /dev/null
+++ b/snd_utils.c
@@ -0,0 +1,149 @@
+/* snd_utils.c
+**
+** Copyright (c) 2019, 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 <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include "snd_utils.h"
+
+#define SND_DLSYM(h, p, s, err) \
+do { \
+ err = 0; \
+ p = dlsym(h, s); \
+ if (!p) \
+ err = -ENODEV; \
+} while(0)
+
+int snd_utils_get_int(struct snd_node *node, const char *prop, int *val)
+{
+ if (!node || !node->card_node || !node->dev_node)
+ return SND_NODE_TYPE_HW;
+
+ return node->get_int(node->dev_node, prop, val);
+}
+
+int snd_utils_get_str(struct snd_node *node, const char *prop, char **val)
+{
+ if (!node || !node->card_node || !node->dev_node)
+ return SND_NODE_TYPE_HW;
+
+ return node->get_str(node->dev_node, prop, val);
+}
+
+void snd_utils_put_dev_node(struct snd_node *node)
+{
+ if (!node)
+ return;
+
+ if (node->card_node)
+ node->put_card(node->card_node);
+
+ if (node->dl_hdl)
+ dlclose(node->dl_hdl);
+
+ free(node);
+}
+
+enum snd_node_type snd_utils_get_node_type(struct snd_node *node)
+{
+ int val = SND_NODE_TYPE_HW;
+
+ if (!node || !node->card_node || !node->dev_node)
+ return SND_NODE_TYPE_HW;
+
+ node->get_int(node->dev_node, "type", &val);
+
+ return val;
+};
+
+
+static int snd_utils_resolve_symbols(struct snd_node *node)
+{
+ void *dl = node->dl_hdl;
+ int err;
+
+ SND_DLSYM(dl, node->get_card, "snd_card_def_get_card", err);
+ if (err)
+ goto done;
+ SND_DLSYM(dl, node->put_card, "snd_card_def_put_card", err);
+ if (err)
+ goto done;
+ SND_DLSYM(dl, node->get_node, "snd_card_def_get_node", err);
+ if (err)
+ goto done;
+ SND_DLSYM(dl, node->get_int, "snd_card_def_get_int", err);
+ if (err)
+ goto done;
+ SND_DLSYM(dl, node->get_str, "snd_card_def_get_str", err);
+
+done:
+ return err;
+}
+
+struct snd_node *snd_utils_get_dev_node(unsigned int card,
+ unsigned int device, int dev_type)
+{
+ struct snd_node *node;
+ int rc = 0;
+
+ node = calloc(1, sizeof(*node));
+ if (!node)
+ return NULL;
+
+ node->dl_hdl = dlopen("libsndcardparser.so", RTLD_NOW);
+ if (!node->dl_hdl) {
+ goto err_dl_open;
+ }
+
+ rc = snd_utils_resolve_symbols(node);
+ if (rc < 0)
+ goto err_resolve_symbols;
+
+ node->card_node = node->get_card(card);
+ if (!node->card_node)
+ goto err_resolve_symbols;
+
+ node->dev_node = node->get_node(node->card_node,
+ device, dev_type);
+ if (!node->dev_node)
+ goto err_get_node;
+
+ return node;
+
+err_get_node:
+ node->put_card(node->card_node);
+
+err_resolve_symbols:
+ dlclose(node->dl_hdl);
+
+err_dl_open:
+ free(node);
+ return NULL;
+}
