path: root/apps/voice_thread.c
diff options
authorMichael Sevakis <>2013-05-23 13:58:51 -0400
committerMichael Sevakis <>2013-07-06 04:22:04 +0200
commitd37bf24d9011addbfbd40942a4e9bbf26de7df00 (patch)
treedafb7eaeb494081668a4841d490fce2bfbb2438d /apps/voice_thread.c
parent00faabef5e902008172e08d3bcd77683cbafef51 (diff)
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: Reviewed-by: Michael Sevakis <> Tested-by: Michael Sevakis <>
Diffstat (limited to 'apps/voice_thread.c')
1 files changed, 6 insertions, 5 deletions
diff --git a/apps/voice_thread.c b/apps/voice_thread.c
index 46471c0d9b..7788f659b0 100644
--- a/apps/voice_thread.c
+++ b/apps/voice_thread.c
@@ -18,7 +18,7 @@
* KIND, either express or implied.
-#include <sys/types.h>
+#include "config.h"
#include "system.h"
#include "core_alloc.h"
#include "thread.h"
@@ -30,8 +30,7 @@
#include "pcm_mixer.h"
#include "codecs/libspeex/speex/speex.h"
-/* Default number of native-frequency PCM frames to queue - adjust as
- necessary per-target */
+/* Default number of PCM frames to queue - adjust as necessary per-target */
#define VOICE_FRAMES 4
/* Define any of these as "1" and uncomment the LOGF_ENABLE line to log
@@ -84,8 +83,8 @@ static struct queue_sender_list voice_queue_sender_list SHAREDBSS_ATTR;
static int quiet_counter SHAREDDATA_ATTR = 0;
static bool voice_playing = false;
#define VOICE_PCM_FRAME_SIZE (VOICE_PCM_FRAME_COUNT*2*sizeof (int16_t))
/* Voice processing states */
@@ -356,11 +355,13 @@ static enum voice_state voice_message(struct voice_thread_data *td)
/* Stop any clip still playing */
+ dsp_configure(td->dsp, DSP_FLUSH, 0);
if (quiet_counter <= 0)
voice_playing = true;
+ dsp_configure(td->dsp, DSP_SET_OUT_FREQUENCY, mixer_get_frequency());
send_event(PLAYBACK_EVENT_VOICE_PLAYING, &voice_playing);