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Added const specifier in several functions

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pcm_get_file_descriptor
pcm_get_error
pcm_get_buffer_size
pcm_frames_to_bytes
pcm_bytes_to_frames
pcm_get_subdevice
This commit is contained in:
Taylor Holberton
2016-12-01 17:50:31 -08:00
parent 15d58481e7
commit 147d7adec6
2 changed files with 12 additions and 12 deletions
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include/tinyalsa/pcm.h
+6 -6
View File
@@ -240,21 +240,21 @@ int pcm_close(struct pcm *pcm);
int pcm_is_ready(const struct pcm *pcm);
int pcm_get_file_descriptor(struct pcm *pcm);
int pcm_get_file_descriptor(const struct pcm *pcm);
const char *pcm_get_error(struct pcm *pcm);
const char *pcm_get_error(const struct pcm *pcm);
unsigned int pcm_format_to_bits(enum pcm_format format);
unsigned int pcm_get_buffer_size(struct pcm *pcm);
unsigned int pcm_get_buffer_size(const struct pcm *pcm);
unsigned int pcm_frames_to_bytes(struct pcm *pcm, unsigned int frames);
unsigned int pcm_frames_to_bytes(const struct pcm *pcm, unsigned int frames);
unsigned int pcm_bytes_to_frames(struct pcm *pcm, unsigned int bytes);
unsigned int pcm_bytes_to_frames(const struct pcm *pcm, unsigned int bytes);
int pcm_get_htimestamp(struct pcm *pcm, unsigned int *avail, struct timespec *tstamp);
unsigned int pcm_get_subdevice(struct pcm *pcm);
unsigned int pcm_get_subdevice(const struct pcm *pcm);
int pcm_write(struct pcm *pcm, const void *data, unsigned int count);
src/pcm.c
+6 -6
View File
@@ -199,7 +199,7 @@ struct pcm {
* @return The buffer size of the PCM.
* @ingroup libtinyalsa-pcm
*/
unsigned int pcm_get_buffer_size(struct pcm *pcm)
unsigned int pcm_get_buffer_size(const struct pcm *pcm)
{
return pcm->buffer_size;
}
@@ -210,7 +210,7 @@ unsigned int pcm_get_buffer_size(struct pcm *pcm)
* @return The file descriptor of the PCM.
* @ingroup libtinyalsa-pcm
*/
int pcm_get_file_descriptor(struct pcm *pcm)
int pcm_get_file_descriptor(const struct pcm *pcm)
{
return pcm->fd;
}
@@ -221,7 +221,7 @@ int pcm_get_file_descriptor(struct pcm *pcm)
* @return The error message of the last error that occured.
* @ingroup libtinyalsa-pcm
*/
const char* pcm_get_error(struct pcm *pcm)
const char* pcm_get_error(const struct pcm *pcm)
{
return pcm->error;
}
@@ -229,7 +229,7 @@ const char* pcm_get_error(struct pcm *pcm)
/** Gets the subdevice on which the pcm has been opened.
* @param pcm A PCM handle.
* @return The subdevice on which the pcm has been opened */
unsigned int pcm_get_subdevice(struct pcm *pcm)
unsigned int pcm_get_subdevice(const struct pcm *pcm)
{
return pcm->subdevice;
}
@@ -311,7 +311,7 @@ unsigned int pcm_format_to_bits(enum pcm_format format)
* @return The number of frames that may fit into @p bytes
* @ingroup libtinyalsa-pcm
*/
unsigned int pcm_bytes_to_frames(struct pcm *pcm, unsigned int bytes)
unsigned int pcm_bytes_to_frames(const struct pcm *pcm, unsigned int bytes)
{
return bytes / (pcm->config.channels *
(pcm_format_to_bits(pcm->config.format) >> 3));
@@ -323,7 +323,7 @@ unsigned int pcm_bytes_to_frames(struct pcm *pcm, unsigned int bytes)
* @return The bytes occupied by @p frames.
* @ingroup libtinyalsa-pcm
*/
unsigned int pcm_frames_to_bytes(struct pcm *pcm, unsigned int frames)
unsigned int pcm_frames_to_bytes(const struct pcm *pcm, unsigned int frames)
{
return frames * pcm->config.channels *
(pcm_format_to_bits(pcm->config.format) >> 3);