[PATCH 1/2] sbc: Pass const pointer if structure is not modified

[Arkadiusz Bokowy <arkadiusz.bokowy@xxxxxxxxx>]

---
 sbc/sbc.c |  8 ++++----
 sbc/sbc.h | 10 +++++-----
 2 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/sbc/sbc.c b/sbc/sbc.c
index 886806d..428c8ee 100644
--- a/sbc/sbc.c
+++ b/sbc/sbc.c
@@ -1378,7 +1378,7 @@ SBC_EXPORT void sbc_finish(sbc_t *sbc)
 	memset(sbc, 0, sizeof(sbc_t));
 }
 
-SBC_EXPORT size_t sbc_get_frame_length(sbc_t *sbc)
+SBC_EXPORT size_t sbc_get_frame_length(const sbc_t *sbc)
 {
 	int ret;
 	uint8_t subbands, channels, blocks, joint, bitpool;
@@ -1407,7 +1407,7 @@ SBC_EXPORT size_t sbc_get_frame_length(sbc_t *sbc)
 	return ret;
 }
 
-SBC_EXPORT unsigned sbc_get_frame_duration(sbc_t *sbc)
+SBC_EXPORT unsigned sbc_get_frame_duration(const sbc_t *sbc)
 {
 	uint8_t subbands, blocks;
 	uint16_t frequency;
@@ -1448,7 +1448,7 @@ SBC_EXPORT unsigned sbc_get_frame_duration(sbc_t *sbc)
 	return (1000000 * blocks * subbands) / frequency;
 }
 
-SBC_EXPORT size_t sbc_get_codesize(sbc_t *sbc)
+SBC_EXPORT size_t sbc_get_codesize(const sbc_t *sbc)
 {
 	uint16_t subbands, channels, blocks;
 	struct sbc_priv *priv;
@@ -1470,7 +1470,7 @@ SBC_EXPORT size_t sbc_get_codesize(sbc_t *sbc)
 	return subbands * blocks * channels * 2;
 }
 
-SBC_EXPORT const char *sbc_get_implementation_info(sbc_t *sbc)
+SBC_EXPORT const char *sbc_get_implementation_info(const sbc_t *sbc)
 {
 	struct sbc_priv *priv;
 
diff --git a/sbc/sbc.h b/sbc/sbc.h
index 9b8c6f2..b7323e8 100644
--- a/sbc/sbc.h
+++ b/sbc/sbc.h
@@ -86,15 +86,15 @@ ssize_t sbc_encode(sbc_t *sbc, const void *input, size_t input_len,
 			void *output, size_t output_len, ssize_t *written);
 
 /* Returns the compressed block size in bytes */
-size_t sbc_get_frame_length(sbc_t *sbc);
+size_t sbc_get_frame_length(const sbc_t *sbc);
 
-/* Returns the time one input/output block takes to play in msec*/
-unsigned sbc_get_frame_duration(sbc_t *sbc);
+/* Returns the time one input/output block takes to play in msec */
+unsigned sbc_get_frame_duration(const sbc_t *sbc);
 
 /* Returns the uncompressed block size in bytes */
-size_t sbc_get_codesize(sbc_t *sbc);
+size_t sbc_get_codesize(const sbc_t *sbc);
 
-const char *sbc_get_implementation_info(sbc_t *sbc);
+const char *sbc_get_implementation_info(const sbc_t *sbc);
 void sbc_finish(sbc_t *sbc);
 
 #ifdef __cplusplus
-- 
2.39.5