From 77979a8855015803c80a3bc99712ed9b72f96020 Mon Sep 17 00:00:00 2001
From: Taylor Holberton <taylorcholberton@gmail.com>
Date: Thu, 1 Dec 2016 20:04:04 -0800
Subject: Added format related getters for PCM

Added functions:
 - pcm_get_channels
 - pcm_get_rate
 - pcm_get_format

These were added since they're required for iterating samples and frames.
---
 include/tinyalsa/pcm.h |  6 ++++++
 src/pcm.c              | 31 +++++++++++++++++++++++++++++++
 2 files changed, 37 insertions(+)

diff --git a/include/tinyalsa/pcm.h b/include/tinyalsa/pcm.h
index a6c95ce..41d3fb4 100644
--- a/include/tinyalsa/pcm.h
+++ b/include/tinyalsa/pcm.h
@@ -240,6 +240,12 @@ int pcm_close(struct pcm *pcm);
 	
 int pcm_is_ready(const struct pcm *pcm);
 
+unsigned int pcm_get_channels(const struct pcm *pcm);
+
+unsigned int pcm_get_rate(const struct pcm *pcm);
+
+enum pcm_format pcm_get_format(const struct pcm *pcm);
+
 int pcm_get_file_descriptor(const struct pcm *pcm);
 
 const char *pcm_get_error(const struct pcm *pcm);
diff --git a/src/pcm.c b/src/pcm.c
index 540fd72..41f072c 100644
--- a/src/pcm.c
+++ b/src/pcm.c
@@ -204,6 +204,37 @@ unsigned int pcm_get_buffer_size(const struct pcm *pcm)
     return pcm->buffer_size;
 }
 
+/** Gets the channel count of the PCM.
+ * @param pcm A PCM handle.
+ * @return The channel count of the PCM.
+ * @ingroup libtinyalsa-pcm
+ */
+unsigned int pcm_get_channels(const struct pcm *pcm)
+{
+	return pcm->config.channels;
+}
+
+/** Gets the rate of the PCM.
+ * The rate is given in frames per second.
+ * @param pcm A PCM handle.
+ * @return The rate of the PCM.
+ * @ingroup libtinyalsa-pcm
+ */
+unsigned int pcm_get_rate(const struct pcm *pcm)
+{
+	return pcm->config.rate;
+}
+
+/** Gets the format of the PCM.
+ * @param pcm A PCM handle.
+ * @return The format of the PCM.
+ * @ingroup libtinyalsa-pcm
+ */
+enum pcm_format pcm_get_format(const struct pcm *pcm)
+{
+	return pcm->config.format;
+}
+
 /** Gets the file descriptor of the PCM.
  * Useful for extending functionality of the PCM when needed.
  * @param pcm A PCM handle.
-- 
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