e200v1/c200v1: Implement limited samplerate switching. Rates 24kHz and below are being a bear as far as minor crackling at higher amplitude-- leave them out for the time being since no solution is currently evident. 48, 44, 32 (rec rates 24, 22, 16) seem perfectly fine. I'm betting c200 is ok to include because it uses the same setup as e200.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27139 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 20 insertions, 0 deletions

diff --git a/firmware/export/pcm_sampr.h b/firmware/export/pcm_sampr.h
index 2204b9c059..54db8a1dfb 100644
--- a/firmware/export/pcm_sampr.h
+++ b/firmware/export/pcm_sampr.h
@@ -312,4 +312,24 @@ enum rec_freq_indexes
 extern const unsigned long rec_freq_sampr[REC_NUM_FREQ];
 #endif /* HAVE_RECORDING */
 
+#ifdef CONFIG_SAMPR_TYPES
+
+#define SAMPR_TYPE_MASK (0xff << 24)
+#define SAMPR_TYPE_PLAY (0x00 << 24)
+#ifdef HAVE_RECORDING
+#define SAMPR_TYPE_REC  (0x01 << 24)
+#endif
+
+unsigned int sampr_type_rec_to_play(unsigned int samplerate);
+
+#else /* ndef CONFIG_SAMPR_TYPES */
+
+/* Types are ignored and == 0 */
+#define SAMPR_TYPE_PLAY 0
+#ifdef HAVE_RECORDING
+#define SAMPR_TYPE_REC  0
+#endif
+
+#endif /* CONFIG_SAMPR_TYPES */
+
 #endif /* PCM_SAMPR_H */