3 files changed, 17 insertions, 1 deletions
diff --git a/include/tinyalsa/mixer.h b/include/tinyalsa/mixer.h
index 7f0f022..2acdd54 100644
--- a/include/tinyalsa/mixer.h
+++ b/include/tinyalsa/mixer.h
@@ -44,7 +44,7 @@ extern "C" {
 #endif
 
 /* TLV header size*/
-#define TLV_HEADER_SIZE (2 * sizeof(unsigned int))
+#define TLV_HEADER_SIZE sizeof(struct snd_ctl_tlv)
 
 struct mixer;
 
diff --git a/include/tinyalsa/pcm.h b/include/tinyalsa/pcm.h
index f4b7d73..1184d81 100644
--- a/include/tinyalsa/pcm.h
+++ b/include/tinyalsa/pcm.h
@@ -95,6 +95,16 @@
  * */
 #define PCM_NONBLOCK 0x00000010
 
+/** Means a PCM is opened
+ * @ingroup libtinyalsa-pcm
+ */
+#define PCM_STATE_OPEN 0x00
+
+/** Means a PCM HW_PARAMS is set
+ * @ingroup libtinyalsa-pcm
+ */
+#define PCM_STATE_SETUP 0x01
+
 /** Means a PCM is prepared
  * @ingroup libtinyalsa-pcm
  */
diff --git a/include/tinyalsa/plugin.h b/include/tinyalsa/plugin.h
index a140754..b2f97b9 100644
--- a/include/tinyalsa/plugin.h
+++ b/include/tinyalsa/plugin.h
@@ -30,6 +30,7 @@
 #ifndef TINYALSA_PLUGIN_H
 #define TINYALSA_PLUGIN_H
 
+#include <poll.h>
 #include <stdint.h>
 #include <stdlib.h>
 #include <sys/types.h>
@@ -128,6 +129,11 @@ struct pcm_plugin_ops {
     /** Any custom or alsa specific ioctl implementation */
     int (*ioctl) (struct pcm_plugin *plugin,
                   int cmd, void *arg);
+    void *(*mmap) (struct pcm_plugin *plugin, void *addr, size_t length,
+                   int prot, int flags, off_t offset);
+    int (*munmap) (struct pcm_plugin *plugin, void *addr, size_t length);
+    int (*poll) (struct pcm_plugin *plugin, struct pollfd *pfd, nfds_t nfds,
+                 int timeout);
 };
 
 /** Minimum and maximum values for hardware parameter constraints.