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author | Michael Sevakis <jethead71@rockbox.org> | 2013-05-23 13:58:51 -0400 |
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committer | Michael Sevakis <jethead71@rockbox.org> | 2013-07-06 04:22:04 +0200 |
commit | d37bf24d9011addbfbd40942a4e9bbf26de7df00 (patch) | |
tree | dafb7eaeb494081668a4841d490fce2bfbb2438d /lib/rbcodec/dsp/dsp_proc_entry.h | |
parent | 00faabef5e902008172e08d3bcd77683cbafef51 (diff) | |
download | rockbox-d37bf24d9011addbfbd40942a4e9bbf26de7df00.tar.gz rockbox-d37bf24d9011addbfbd40942a4e9bbf26de7df00.zip |
Enable setting of global output samplerate on certain targets.
Replaces the NATIVE_FREQUENCY constant with a configurable frequency.
The user may select 48000Hz if the hardware supports it. The default is
still 44100Hz and the minimum is 44100Hz. The setting is located in the
playback settings, under "Frequency".
"Frequency" was duplicated in english.lang for now to avoid having to
fix every .lang file for the moment and throwing everything out of sync
because of the new play_frequency feature in features.txt. The next
cleanup should combine it with the one included for recording and
generalize the ID label.
If the hardware doesn't support 48000Hz, no setting will be available.
On particular hardware where very high rates are practical and desireable,
the upper bound can be extended by patching.
The PCM mixer can be configured to play at the full hardware frequency
range. The DSP core can configure to the hardware minimum up to the
maximum playback setting (some buffers must be reserved according to
the maximum rate).
If only 44100Hz is supported or possible on a given target for playback,
using the DSP and mixer at other samperates is possible if the hardware
offers them.
Change-Id: I6023cf0c0baa8bc6292b6919b4dd3618a6a25622
Reviewed-on: http://gerrit.rockbox.org/479
Reviewed-by: Michael Sevakis <jethead71@rockbox.org>
Tested-by: Michael Sevakis <jethead71@rockbox.org>
Diffstat (limited to 'lib/rbcodec/dsp/dsp_proc_entry.h')
-rw-r--r-- | lib/rbcodec/dsp/dsp_proc_entry.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/rbcodec/dsp/dsp_proc_entry.h b/lib/rbcodec/dsp/dsp_proc_entry.h index 902385f08d..1bf59dd73a 100644 --- a/lib/rbcodec/dsp/dsp_proc_entry.h +++ b/lib/rbcodec/dsp/dsp_proc_entry.h | |||
@@ -132,6 +132,10 @@ typedef intptr_t (*dsp_proc_config_fn_type)(struct dsp_proc_entry *this, | |||
132 | * by processing code! */ | 132 | * by processing code! */ |
133 | void dsp_proc_enable(struct dsp_config *dsp, enum dsp_proc_ids id, | 133 | void dsp_proc_enable(struct dsp_config *dsp, enum dsp_proc_ids id, |
134 | bool enable); | 134 | bool enable); |
135 | |||
136 | /* Is the specified stage enabled on the DSP? */ | ||
137 | bool dsp_proc_enabled(struct dsp_config *dsp, enum dsp_proc_ids id); | ||
138 | |||
135 | /* Activate/deactivate processing stage, doesn't affect enabled status | 139 | /* Activate/deactivate processing stage, doesn't affect enabled status |
136 | * thus will not enable anything - | 140 | * thus will not enable anything - |
137 | * may be called during processing to activate/deactivate for format | 141 | * may be called during processing to activate/deactivate for format |