AS3525v1/v2:

Fix problems with volume of recorded material by converting 14-bit samples to
16-bit. Remove duplicate samples from recorded data and support proper
samplerate since ADC runs 1/2 the codec clock. Support monitoring mono on both
output channels by feeding data manually to I2SOUT under the right conditions.

DMA is no longer used for recording since frames must be processed as described
above but it does allow full-duplex audio.

Miscellaneous change includes a proper constant (HW_SAMPR_DEFAULT) to reset the
hardware samplerate when recording is closed. PP5024 and AS3525 have different
default recording rates (22kHz and 44kHz respectively) but both have half-speed
ADC.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@31180 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 4 insertions, 1 deletions

diff --git a/firmware/export/pcm_sampr.h b/firmware/export/pcm_sampr.h
index 62bfd0068b..01a8ed428e 100644
--- a/firmware/export/pcm_sampr.h
+++ b/firmware/export/pcm_sampr.h
@@ -305,6 +305,8 @@ enum rec_freq_indexes
 #define REC_SAMPR_DEFAULT SAMPR_44
 #endif
 
+#define HW_SAMPR_RESET  0
+
 #define REC_FREQ_CFG_VAL_LIST  &REC_HAVE_96_(",96") REC_HAVE_88_(",88") \
                                 REC_HAVE_64_(",64") REC_HAVE_48_(",48") \
                                 REC_HAVE_44_(",44") REC_HAVE_32_(",32") \
@@ -324,7 +326,8 @@ extern const unsigned long rec_freq_sampr[REC_NUM_FREQ];
 #define SAMPR_TYPE_REC  (0x01 << 24)
 #endif
 
-unsigned int pcm_sampr_type_rec_to_play(unsigned int samplerate);
+unsigned int pcm_sampr_to_hw_sampr(unsigned int samplerate,
+                                   unsigned int type);
 
 #else /* ndef CONFIG_SAMPR_TYPES */