From: Guneshwor Singh guneshwor.o.singh@intel.com
Get PCM sample rate from rate name similar to snd_pcm_format_value() which retrieves format from format name.
Signed-off-by: Guneshwor Singh guneshwor.o.singh@intel.com --- include/pcm.h | 38 ++++++++++++++++++++++++++++++++++++++ src/pcm/pcm.c | 37 +++++++++++++++++++++++++++++++++++++ 2 files changed, 75 insertions(+)
diff --git a/include/pcm.h b/include/pcm.h index 0be1a321..81bc55b1 100644 --- a/include/pcm.h +++ b/include/pcm.h @@ -119,6 +119,43 @@ typedef enum _snd_pcm_access { SND_PCM_ACCESS_LAST = SND_PCM_ACCESS_RW_NONINTERLEAVED } snd_pcm_access_t;
+/** PCM sample rate */ +typedef enum _snd_pcm_rates { + /** Unknown */ + SND_PCM_RATE_UNKNOWN = -1, + /** 5512 Hz sample rate */ + SND_PCM_RATE_5512 = 0, + /** 8000 Hz sample rate */ + SND_PCM_RATE_8000, + /** 11025 Hz sample rate */ + SND_PCM_RATE_11025, + /** 16000 Hz sample rate */ + SND_PCM_RATE_16000, + /** 22050 Hz sample rate */ + SND_PCM_RATE_22050, + /** 32000 Hz sample rate */ + SND_PCM_RATE_32000, + /** 44100 Hz sample rate */ + SND_PCM_RATE_44100, + /** 48000 Hz sample rate */ + SND_PCM_RATE_48000, + /** 64000 Hz sample rate */ + SND_PCM_RATE_64000, + /** 88200 Hz sample rate */ + SND_PCM_RATE_88200, + /** 96000 Hz sample rate */ + SND_PCM_RATE_96000, + /** 176400 Hz sample rate */ + SND_PCM_RATE_176400, + /** 192000 Hz sample rate */ + SND_PCM_RATE_192000, + /** continuous range within rate_min and rate_max */ + SND_PCM_RATE_CONTINUOUS = 30, + /** more continuous range */ + SND_PCM_RATE_KNOT = 31, + SND_PCM_RATE_LAST = SND_PCM_RATE_KNOT, +} snd_pcm_rates_t; + /** PCM sample format */ typedef enum _snd_pcm_format { /** Unknown */ @@ -1047,6 +1084,7 @@ const char *snd_pcm_format_description(const snd_pcm_format_t format); const char *snd_pcm_subformat_name(const snd_pcm_subformat_t subformat); const char *snd_pcm_subformat_description(const snd_pcm_subformat_t subformat); snd_pcm_format_t snd_pcm_format_value(const char* name); +snd_pcm_rates_t snd_pcm_rate_value(const char* name); const char *snd_pcm_tstamp_mode_name(const snd_pcm_tstamp_t mode); const char *snd_pcm_state_name(const snd_pcm_state_t state);
diff --git a/src/pcm/pcm.c b/src/pcm/pcm.c index 200b10c2..bff1b949 100644 --- a/src/pcm/pcm.c +++ b/src/pcm/pcm.c @@ -1722,6 +1722,7 @@ static int __snd_pcm_poll_revents(snd_pcm_t *pcm, struct pollfd *pfds, #define START(v) [SND_PCM_START_##v] = #v #define HW_PARAM(v) [SND_PCM_HW_PARAM_##v] = #v #define SW_PARAM(v) [SND_PCM_SW_PARAM_##v] = #v +#define RATE(v) [SND_PCM_RATE_##v] = #v #define FORMAT(v) [SND_PCM_FORMAT_##v] = #v #define SUBFORMAT(v) [SND_PCM_SUBFORMAT_##v] = #v
@@ -1754,6 +1755,24 @@ static const char *const snd_pcm_access_names[] = { ACCESS(RW_NONINTERLEAVED), };
+static const char *const snd_pcm_rate_names[] = { + RATE(5512), + RATE(8000), + RATE(11025), + RATE(16000), + RATE(22050), + RATE(32000), + RATE(44100), + RATE(48000), + RATE(64000), + RATE(88200), + RATE(96000), + RATE(176400), + RATE(192000), + RATE(CONTINUOUS), + RATE(KNOT), +}; + static const char *const snd_pcm_format_names[] = { FORMAT(S8), FORMAT(U8), @@ -1978,6 +1997,24 @@ const char *snd_pcm_format_description(snd_pcm_format_t format) }
/** + * \brief get PCM sample rate from name + * \param name PCM sample rate name (case insensitive) + * \return PCM sample rate + */ +snd_pcm_rates_t snd_pcm_rate_value(const char* name) +{ + snd_pcm_rates_t rate; + for (rate = 0; rate <= SND_PCM_RATE_LAST; rate++) { + if (snd_pcm_rate_names[rate] && + strcasecmp(name, snd_pcm_rate_names[rate]) == 0) { + return rate; + } + } + + return SND_PCM_RATE_UNKNOWN; +} + +/** * \brief get PCM sample format from name * \param name PCM sample format name (case insensitive) * \return PCM sample format