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commit 326261dd7d8ba55cbfe369cf990a7349cd2f7a41
Author: Lucas Saavedra Vaz <lucas....@espressif.com>
AuthorDate: Thu Mar 16 22:54:34 2023 -0300
drivers/audio/es8388: Add input support
---
drivers/audio/Kconfig | 53 +++++
drivers/audio/es8388.c | 492 ++++++++++++++++++++++++++++----------------
drivers/audio/es8388.h | 8 +-
include/nuttx/audio/audio.h | 5 -
4 files changed, 373 insertions(+), 185 deletions(-)
diff --git a/drivers/audio/Kconfig b/drivers/audio/Kconfig
index 0a4a689619..dd6c628a64 100644
--- a/drivers/audio/Kconfig
+++ b/drivers/audio/Kconfig
@@ -210,6 +210,7 @@ config AUDIO_ES8388
bool "ES8388 codec chip"
default n
depends on AUDIO
+ select AUDIO_DRIVER_SPECIFIC_BUFFERS
---help---
Select to enable support for the ES8388 Audio codec by Everest
Semiconductor.
@@ -223,10 +224,62 @@ config ES8388_INPUT_INITVOLUME
int "ES8388 initial input volume setting"
default 1000
+config ES8388_OUTPUT_CHANNEL
+ int
+ default 0 if ES8388_OUTPUT_CHANNEL_LINE1
+ default 1 if ES8388_OUTPUT_CHANNEL_LINE2
+ default 2 if ES8388_OUTPUT_CHANNEL_ALL
+
+choice
+ prompt "ES8388 output channel"
+ default ES8388_OUTPUT_CHANNEL_ALL
+ ---help---
+ Select the codec channel that will output audio.
+ The actual device that will reproduce the audio signal depends
+ on the board implementation.
+
+config ES8388_OUTPUT_CHANNEL_LINE1
+ bool "Line 1"
+
+config ES8388_OUTPUT_CHANNEL_LINE2
+ bool "Line 2"
+
+config ES8388_OUTPUT_CHANNEL_ALL
+ bool "Both"
+
+endchoice
+
config ES8388_OUTPUT_INITVOLUME
int "ES8388 initial output volume setting"
default 400
+config ES8388_INPUT_CHANNEL
+ int
+ default 0 if ES8388_INPUT_CHANNEL_LINE1
+ default 1 if ES8388_INPUT_CHANNEL_LINE2
+ default 3 if ES8388_INPUT_CHANNEL_DIFFERENTIAL
+
+choice
+ prompt "ES8388 input channel"
+ default ES8388_INPUT_CHANNEL_LINE1
+ ---help---
+ Select the codec channel that will input audio.
+ The actual device that will reproduce the audio signal depends
+ on the board implementation.
+ The "Differential" option will take the difference between the
Line 1
+ left and right channels.
+
+config ES8388_INPUT_CHANNEL_LINE1
+ bool "Line 1"
+
+config ES8388_INPUT_CHANNEL_LINE2
+ bool "Line 2"
+
+config ES8388_INPUT_CHANNEL_DIFFERENTIAL
+ bool "Differential"
+
+endchoice
+
config ES8388_INFLIGHT
int "ES8388 maximum in-flight audio buffers"
default 2
diff --git a/drivers/audio/es8388.c b/drivers/audio/es8388.c
index 7e81eba636..31821cbfa3 100644
--- a/drivers/audio/es8388.c
+++ b/drivers/audio/es8388.c
@@ -68,10 +68,16 @@ static void es8388_writereg(FAR struct es8388_dev_s *priv,
uint16_t regval);
#ifndef CONFIG_AUDIO_EXCLUDE_VOLUME
static void es8388_setvolume(FAR struct es8388_dev_s *priv,
+ es8388_module_t module,
uint16_t volume);
#endif
static void es8388_setmclkfrequency(FAR struct es8388_dev_s *priv);
-static void es8388_setmute(FAR struct es8388_dev_s *priv, bool enable);
+#ifndef CONFIG_AUDIO_EXCLUDE_MUTE
+static void es8388_setmute(FAR struct es8388_dev_s *priv,
+ es8388_module_t module,
+ bool enable);
+#endif
+static void es8388_setmicgain(FAR struct es8388_dev_s *priv, uint32_t gain);
static void es8388_setbitspersample(FAR struct es8388_dev_s *priv);
static void es8388_setsamplerate(FAR struct es8388_dev_s *priv);
static int es8388_getcaps(FAR struct audio_lowerhalf_s *dev,
@@ -86,12 +92,12 @@ static int es8388_configure(FAR struct audio_lowerhalf_s
*dev,
FAR const struct audio_caps_s *caps);
#endif
static int es8388_shutdown(FAR struct audio_lowerhalf_s *dev);
-static void es8388_senddone(FAR struct i2s_dev_s *i2s,
- FAR struct ap_buffer_s *apb,
- FAR void *arg,
- int result);
+static void es8388_processdone(FAR struct i2s_dev_s *i2s,
+ FAR struct ap_buffer_s *apb,
+ FAR void *arg,
+ int result);
static void es8388_returnbuffers(FAR struct es8388_dev_s *priv);
-static int es8388_sendbuffer(FAR struct es8388_dev_s *priv);
+static int es8388_processbegin(FAR struct es8388_dev_s *priv);
#ifdef CONFIG_AUDIO_MULTI_SESSION
static int es8388_start(FAR struct audio_lowerhalf_s *dev,
FAR void *session);
@@ -138,9 +144,7 @@ static int es8388_release(FAR struct audio_lowerhalf_s
*dev);
#endif
static void *es8388_workerthread(pthread_addr_t pvarg);
static void es8388_audio_output(FAR struct es8388_dev_s *priv);
-#if 0
static void es8388_audio_input(FAR struct es8388_dev_s *priv);
-#endif
static void es8388_reset(FAR struct es8388_dev_s *priv);
/****************************************************************************
@@ -171,6 +175,10 @@ static const struct audio_ops_s g_audioops =
es8388_release /* release */
};
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
/****************************************************************************
* Name: es8388_readreg
*
@@ -232,11 +240,11 @@ uint8_t es8388_readreg(FAR struct es8388_dev_s *priv,
uint8_t regaddr)
ret = I2C_RESET(priv->i2c);
if (ret < 0)
{
- auderr("ERROR: I2C_RESET failed: %d\n", ret);
+ auderr("I2C_RESET failed: %d\n", ret);
break;
}
#else
- auderr("ERROR: I2C_TRANSFER failed: %d\n", ret);
+ auderr("I2C_TRANSFER failed: %d\n", ret);
#endif
}
else
@@ -313,11 +321,11 @@ static void es8388_writereg(FAR struct es8388_dev_s *priv,
ret = I2C_RESET(priv->i2c);
if (ret < 0)
{
- auderr("ERROR: I2C_RESET failed: %d\n", ret);
+ auderr("I2C_RESET failed: %d\n", ret);
break;
}
#else
- auderr("ERROR: I2C_TRANSFER failed: %d\n", ret);
+ auderr("I2C_TRANSFER failed: %d\n", ret);
#endif
}
else
@@ -334,6 +342,43 @@ static void es8388_writereg(FAR struct es8388_dev_s *priv,
}
}
+/****************************************************************************
+ * Name: es8388_setmicgain
+ *
+ * Description:
+ * Set the microphone gain.
+ *
+ * Input Parameters:
+ * priv - A reference to the driver state structure.
+ * gain - The microphone gain to be set in the codec (0..24).
+ *
+ * Returned Value:
+ * None.
+ *
+ ****************************************************************************/
+
+static void es8388_setmicgain(FAR struct es8388_dev_s *priv, uint32_t gain)
+{
+ static const es8388_mic_gain_t gain_map[] =
+ {
+ ES8388_MIC_GAIN_0DB,
+ ES8388_MIC_GAIN_3DB,
+ ES8388_MIC_GAIN_6DB,
+ ES8388_MIC_GAIN_9DB,
+ ES8388_MIC_GAIN_12DB,
+ ES8388_MIC_GAIN_15DB,
+ ES8388_MIC_GAIN_18DB,
+ ES8388_MIC_GAIN_21DB,
+ ES8388_MIC_GAIN_24DB,
+ };
+
+ priv->mic_gain = gain_map[MIN(gain, 24) / 3];
+
+ es8388_writereg(priv, ES8388_ADCCONTROL1,
+ ES8388_MICAMPR(priv->mic_gain) |
+ ES8388_MICAMPL(priv->mic_gain));
+}
+
/****************************************************************************
* Name: es8388_setvolume
*
@@ -351,7 +396,9 @@ static void es8388_writereg(FAR struct es8388_dev_s *priv,
****************************************************************************/
#ifndef CONFIG_AUDIO_EXCLUDE_VOLUME
-static void es8388_setvolume(FAR struct es8388_dev_s *priv, uint16_t volume)
+static void es8388_setvolume(FAR struct es8388_dev_s *priv,
+ es8388_module_t module,
+ uint16_t volume)
{
uint16_t leftlvl;
int16_t dbleftlvl;
@@ -400,16 +447,16 @@ static void es8388_setvolume(FAR struct es8388_dev_s
*priv, uint16_t volume)
}
# else
- leftlvl = priv->volume;
- rightlvl = priv->volume;
+ leftlvl = volume;
+ rightlvl = volume;
# endif
/* Convert from (0..1000) to (-96..0) */
dbleftlvl = (int16_t)
- (leftlvl ? (20 * log10f(rightlvl / AUDIO_VOLUME_MAX_FLOAT)) : -96);
+ (leftlvl ? (20 * log10f((float)rightlvl / AUDIO_VOLUME_MAX)) : -96);
dbrightlvl = (int16_t)
- (rightlvl ? (20 * log10f(rightlvl / AUDIO_VOLUME_MAX_FLOAT)) : -96);
+ (rightlvl ? (20 * log10f((float)rightlvl / AUDIO_VOLUME_MAX)) : -96);
audinfo("Volume: dbleftlvl = %d, dbrightlvl = %d\n",
dbleftlvl, dbrightlvl);
@@ -421,23 +468,19 @@ static void es8388_setvolume(FAR struct es8388_dev_s
*priv, uint16_t volume)
/* Set the volume */
- if (priv->audio_mode == ES8388_MODULE_DAC ||
- priv->audio_mode == ES8388_MODULE_ADC_DAC)
+ if (module == ES8388_MODULE_DAC || module == ES8388_MODULE_ADC_DAC)
{
es8388_writereg(priv, ES8388_DACCONTROL4, ES8388_LDACVOL(dbleftlvl));
es8388_writereg(priv, ES8388_DACCONTROL5, ES8388_RDACVOL(dbrightlvl));
+ priv->volume_out = volume;
}
- if (priv->audio_mode == ES8388_MODULE_ADC ||
- priv->audio_mode == ES8388_MODULE_ADC_DAC)
+ if (module == ES8388_MODULE_ADC || module == ES8388_MODULE_ADC_DAC)
{
es8388_writereg(priv, ES8388_ADCCONTROL8, ES8388_LADCVOL(dbleftlvl));
es8388_writereg(priv, ES8388_ADCCONTROL9, ES8388_RADCVOL(dbrightlvl));
+ priv->volume_in = volume;
}
-
- /* Remember the volume level and mute settings */
-
- priv->volume = volume;
}
#endif /* CONFIG_AUDIO_EXCLUDE_VOLUME */
@@ -490,18 +533,18 @@ static void es8388_setmclkfrequency(FAR struct
es8388_dev_s *priv)
{
if (ret != -ENOTTY)
{
- auderr("ERROR: Failed to set the MCLK on lower half\n");
+ auderr("Failed to set the MCLK on lower half\n");
}
else
{
priv->mclk = 0;
- auderr("WARNING: MCLK cannot be set on lower half\n");
+ auderr("MCLK cannot be set on lower half\n");
}
}
}
else
{
- auderr("ERROR: Unsupported combination of sample rate and"
+ auderr("Unsupported combination of sample rate and"
" data width\n");
}
}
@@ -521,16 +564,18 @@ static void es8388_setmclkfrequency(FAR struct
es8388_dev_s *priv)
*
****************************************************************************/
-static void es8388_setmute(FAR struct es8388_dev_s *priv, bool enable)
+#ifndef CONFIG_AUDIO_EXCLUDE_MUTE
+static void es8388_setmute(FAR struct es8388_dev_s *priv,
+ es8388_module_t module,
+ bool enable)
{
uint8_t reg = 0;
- audinfo("Volume: mute=%d\n", (int)enable);
+ audinfo("module=%d, mute=%d\n", module, (int)enable);
priv->mute = enable;
- if (priv->audio_mode == ES8388_MODULE_DAC ||
- priv->audio_mode == ES8388_MODULE_ADC_DAC)
+ if (module == ES8388_MODULE_DAC || module == ES8388_MODULE_ADC_DAC)
{
reg = es8388_readreg(priv, ES8388_DACCONTROL3) &
(~ES8388_DACMUTE_BITMASK);
@@ -538,8 +583,7 @@ static void es8388_setmute(FAR struct es8388_dev_s *priv,
bool enable)
reg | ES8388_DACMUTE(enable));
}
- if (priv->audio_mode == ES8388_MODULE_ADC ||
- priv->audio_mode == ES8388_MODULE_ADC_DAC)
+ if (module == ES8388_MODULE_ADC || module == ES8388_MODULE_ADC_DAC)
{
reg = es8388_readreg(priv, ES8388_ADCCONTROL7) &
(~ES8388_ADCMUTE_BITMASK);
@@ -547,6 +591,7 @@ static void es8388_setmute(FAR struct es8388_dev_s *priv,
bool enable)
reg | ES8388_ADCMUTE(enable));
}
}
+#endif
/****************************************************************************
* Name: es8388_setbitspersample
@@ -592,7 +637,7 @@ static void es8388_setbitspersample(FAR struct es8388_dev_s
*priv)
break;
default:
- audwarn("ERROR: Data length not supported.\n");
+ audwarn("Data length not supported.\n");
return;
}
@@ -675,7 +720,7 @@ static void es8388_setsamplerate(FAR struct es8388_dev_s
*priv)
break;
default:
- audwarn("ERROR: Sample rate not supported.\n");
+ audwarn("Sample rate not supported.\n");
return;
}
@@ -746,22 +791,17 @@ static int es8388_getcaps(FAR struct audio_lowerhalf_s
*dev, int type,
{
case AUDIO_TYPE_QUERY:
- /* We don't decode any formats! Only something above us in
- * the audio stream can perform decoding on our behalf.
- */
+ /* The input formats we can decode / accept */
- /* The types of audio units we implement */
-
- caps->ac_controls.b[0] =
- AUDIO_TYPE_OUTPUT | AUDIO_TYPE_FEATURE |
- AUDIO_TYPE_PROCESSING;
- break;
-
- case AUDIO_FMT_MIDI:
+#ifdef CONFIG_AUDIO_FORMAT_PCM
+ caps->ac_format.hw |= (1 << (AUDIO_FMT_PCM - 1));
+#endif
- /* We only support Format 0 */
+ /* The types of audio units we implement */
- caps->ac_controls.b[0] = AUDIO_SUBFMT_END;
+ caps->ac_controls.b[0] = AUDIO_TYPE_INPUT |
+ AUDIO_TYPE_OUTPUT |
+ AUDIO_TYPE_FEATURE;
break;
default:
@@ -789,17 +829,35 @@ static int es8388_getcaps(FAR struct audio_lowerhalf_s
*dev, int type,
AUDIO_SAMP_RATE_11K | AUDIO_SAMP_RATE_16K |
AUDIO_SAMP_RATE_22K | AUDIO_SAMP_RATE_32K |
AUDIO_SAMP_RATE_44K | AUDIO_SAMP_RATE_48K;
+ caps->ac_controls.b[1] = 0;
break;
- case AUDIO_FMT_MP3:
- case AUDIO_FMT_WMA:
- case AUDIO_FMT_PCM:
+ default:
+ break;
+ }
+
+ break;
+
+ case AUDIO_TYPE_INPUT:
+
+ caps->ac_channels = 2;
+
+ switch (caps->ac_subtype)
+ {
+ case AUDIO_TYPE_QUERY:
+
+ /* Report supported input sample rates */
+
+ caps->ac_controls.b[0] =
+ AUDIO_SAMP_RATE_11K | AUDIO_SAMP_RATE_16K |
+ AUDIO_SAMP_RATE_22K | AUDIO_SAMP_RATE_32K |
+ AUDIO_SAMP_RATE_44K | AUDIO_SAMP_RATE_48K;
+ caps->ac_controls.b[1] = 0;
break;
default:
break;
}
-
break;
/* Provide capabilities of our FEATURE units */
@@ -816,41 +874,13 @@ static int es8388_getcaps(FAR struct audio_lowerhalf_s
*dev, int type,
* have.
*/
- caps->ac_controls.b[0] = AUDIO_FU_VOLUME;
- caps->ac_controls.b[1] = AUDIO_FU_BALANCE >> 8;
+ caps->ac_controls.b[0] = AUDIO_FU_VOLUME | AUDIO_FU_MUTE;
+ caps->ac_controls.b[1] = (AUDIO_FU_BALANCE |
+ AUDIO_FU_INP_GAIN) >> 8;
}
break;
- /* Provide capabilities of our PROCESSING unit */
-
- case AUDIO_TYPE_PROCESSING:
-
- switch (caps->ac_subtype)
- {
- case AUDIO_PU_UNDEF:
-
- /* Provide the type of Processing Units we support */
-
- caps->ac_controls.b[0] = AUDIO_PU_STEREO_EXTENDER;
- break;
-
- case AUDIO_PU_STEREO_EXTENDER:
-
- /* Provide capabilities of our Stereo Extender */
-
- caps->ac_controls.b[0] =
- AUDIO_STEXT_ENABLE | AUDIO_STEXT_WIDTH;
- break;
-
- default:
-
- /* Other types of processing uint we don't support */
-
- break;
- }
- break;
-
/* All others we don't support */
default:
@@ -922,7 +952,7 @@ static int es8388_configure(FAR struct audio_lowerhalf_s
*dev,
if (volume >= 0 && volume <= 1000)
{
- es8388_setvolume(priv, volume);
+ es8388_setvolume(priv, priv->audio_mode, volume);
}
else
{
@@ -932,6 +962,19 @@ static int es8388_configure(FAR struct audio_lowerhalf_s
*dev,
break;
#endif /* CONFIG_AUDIO_EXCLUDE_VOLUME */
+#ifndef CONFIG_AUDIO_EXCLUDE_MUTE
+ case AUDIO_FU_MUTE:
+ {
+ /* Mute/Unmute */
+
+ bool mute = (bool)caps->ac_controls.hw[0];
+ audinfo(" Mute: %d\n", mute);
+
+ es8388_setmute(priv, ES8388_MODULE_DAC, mute);
+ }
+ break;
+#endif /* CONFIG_AUDIO_EXCLUDE_MUTE */
+
#ifndef CONFIG_AUDIO_EXCLUDE_BALANCE
case AUDIO_FU_BALANCE:
{
@@ -942,7 +985,7 @@ static int es8388_configure(FAR struct audio_lowerhalf_s
*dev,
if (balance >= 0 && balance <= 1000)
{
priv->balance = balance;
- es8388_setvolume(priv, priv->volume);
+ es8388_setvolume(priv, priv->audio_mode, priv->volume_out);
}
else
{
@@ -952,8 +995,19 @@ static int es8388_configure(FAR struct audio_lowerhalf_s
*dev,
break;
#endif /* CONFIG_AUDIO_EXCLUDE_VOLUME */
+ case AUDIO_FU_INP_GAIN:
+ {
+ /* Set the mic gain */
+
+ uint32_t mic_gain = caps->ac_controls.hw[0];
+ audinfo(" Mic gain: %" PRIu32 "\n", mic_gain);
+
+ es8388_setmicgain(priv, mic_gain);
+ }
+ break;
+
default:
- auderr(" ERROR: Unrecognized feature unit\n");
+ auderr(" Unrecognized feature unit\n");
ret = -ENOTTY;
break;
}
@@ -971,7 +1025,50 @@ static int es8388_configure(FAR struct audio_lowerhalf_s
*dev,
ret = -ERANGE;
if (caps->ac_channels != 1 && caps->ac_channels != 2)
{
- auderr("ERROR: Unsupported number of channels: %d\n",
+ auderr("Unsupported number of channels: %d\n",
+ caps->ac_channels);
+ break;
+ }
+
+ if (caps->ac_controls.b[2] != 16 &&
+ caps->ac_controls.b[2] != 18 &&
+ caps->ac_controls.b[2] != 20 &&
+ caps->ac_controls.b[2] != 24 &&
+ caps->ac_controls.b[2] != 32)
+ {
+ auderr("Unsupported bits per sample: %d\n",
+ caps->ac_controls.b[2]);
+ break;
+ }
+
+ /* Save the current stream configuration */
+
+ priv->samprate = caps->ac_controls.hw[0];
+ priv->nchannels = caps->ac_channels;
+ priv->bpsamp = caps->ac_controls.b[2];
+
+ es8388_audio_output(priv);
+ es8388_reset(priv);
+ es8388_setsamplerate(priv);
+ es8388_setbitspersample(priv);
+
+ ret = OK;
+ }
+ break;
+
+ case AUDIO_TYPE_INPUT:
+ {
+ audinfo(" AUDIO_TYPE_INPUT:\n");
+ audinfo(" Number of channels: %u\n", caps->ac_channels);
+ audinfo(" Sample rate: %u\n", caps->ac_controls.hw[0]);
+ audinfo(" Sample width: %u\n", caps->ac_controls.b[2]);
+
+ /* Verify that all of the requested values are supported */
+
+ ret = -ERANGE;
+ if (caps->ac_channels != 1 && caps->ac_channels != 2)
+ {
+ auderr("Unsupported number of channels: %d\n",
caps->ac_channels);
break;
}
@@ -982,7 +1079,7 @@ static int es8388_configure(FAR struct audio_lowerhalf_s
*dev,
caps->ac_controls.b[2] != 24 &&
caps->ac_controls.b[2] != 32)
{
- auderr("ERROR: Unsupported bits per sample: %d\n",
+ auderr("Unsupported bits per sample: %d\n",
caps->ac_controls.b[2]);
break;
}
@@ -993,6 +1090,8 @@ static int es8388_configure(FAR struct audio_lowerhalf_s
*dev,
priv->nchannels = caps->ac_channels;
priv->bpsamp = caps->ac_controls.b[2];
+ es8388_audio_input(priv);
+ es8388_reset(priv);
es8388_setsamplerate(priv);
es8388_setbitspersample(priv);
@@ -1038,7 +1137,7 @@ static int es8388_shutdown(FAR struct audio_lowerhalf_s
*dev)
}
/****************************************************************************
- * Name: es8388_senddone
+ * Name: es8388_processdone
*
* Description:
* This is the I2S callback function that is invoked when the transfer
@@ -1055,9 +1154,10 @@ static int es8388_shutdown(FAR struct audio_lowerhalf_s
*dev)
*
****************************************************************************/
-static void es8388_senddone(FAR struct i2s_dev_s *i2s,
- FAR struct ap_buffer_s *apb, FAR void *arg,
- int result)
+static void es8388_processdone(FAR struct i2s_dev_s *i2s,
+ FAR struct ap_buffer_s *apb,
+ FAR void *arg,
+ int result)
{
FAR struct es8388_dev_s *priv = (FAR struct es8388_dev_s *)arg;
struct audio_msg_s msg;
@@ -1065,7 +1165,7 @@ static void es8388_senddone(FAR struct i2s_dev_s *i2s,
int ret;
DEBUGASSERT(i2s && priv && priv->running && apb);
- audinfo("senddone: apb=%p inflight=%d result=%d\n",
+ audinfo("Transfer done: apb=%p inflight=%d result=%d\n",
apb, priv->inflight, result);
/* We do not place any restriction on the context in which this function
@@ -1102,7 +1202,7 @@ static void es8388_senddone(FAR struct i2s_dev_s *i2s,
CONFIG_ES8388_MSG_PRIO);
if (ret < 0)
{
- auderr("ERROR: file_mq_send failed: %d\n", ret);
+ auderr("file_mq_send failed: %d\n", ret);
}
}
@@ -1180,12 +1280,12 @@ static void es8388_returnbuffers(FAR struct
es8388_dev_s *priv)
}
/****************************************************************************
- * Name: es8388_sendbuffer
+ * Name: es8388_processbegin
*
* Description:
* Start the transfer an audio buffer to the ES8388 via I2S. This
* will not wait for the transfer to complete but will return immediately.
- * the es8388_senddone called will be invoked when the transfer
+ * the es8388_processdone called will be invoked when the transfer
* completes, stimulating the worker thread to call this function again.
*
* Input Parameters:
@@ -1196,7 +1296,7 @@ static void es8388_returnbuffers(FAR struct es8388_dev_s
*priv)
*
****************************************************************************/
-static int es8388_sendbuffer(FAR struct es8388_dev_s *priv)
+static int es8388_processbegin(FAR struct es8388_dev_s *priv)
{
FAR struct ap_buffer_s *apb;
irqstate_t flags;
@@ -1228,7 +1328,7 @@ static int es8388_sendbuffer(FAR struct es8388_dev_s
*priv)
/* Take next buffer from the queue of pending transfers */
apb = (FAR struct ap_buffer_s *)dq_remfirst(&priv->pendq);
- audinfo("Sending apb=%p, size=%d inflight=%d\n",
+ audinfo("Transferring apb=%p, size=%d inflight=%d\n",
apb, apb->nbytes, priv->inflight);
/* Increment the number of buffers in-flight before sending in order
@@ -1243,7 +1343,7 @@ static int es8388_sendbuffer(FAR struct es8388_dev_s
*priv)
* to use? This would depend on the bit rate and size of the buffer.
*
* Samples in the buffer (samples):
- * = buffer_size * 8 / bpsamp samples
+ * = buffer_size * 8 / bpsamp
* Sample rate (samples/second):
* = samplerate * nchannels
* Expected transfer time (seconds):
@@ -1268,10 +1368,20 @@ static int es8388_sendbuffer(FAR struct es8388_dev_s
*priv)
timeout = MSEC2TICK(((uint32_t)(apb->nbytes - apb->curbyte) << shift) /
(uint32_t)priv->samprate / (uint32_t)priv->bpsamp);
- ret = I2S_SEND(priv->i2s, apb, es8388_senddone, priv, timeout);
+ if (priv->audio_mode == ES8388_MODULE_DAC)
+ {
+ ret = I2S_SEND(priv->i2s, apb, es8388_processdone,
+ priv, timeout);
+ }
+ else
+ {
+ ret = I2S_RECEIVE(priv->i2s, apb, es8388_processdone,
+ priv, timeout);
+ }
+
if (ret < 0)
{
- auderr("ERROR: I2S_SEND failed: %d\n", ret);
+ auderr("I2S transfer failed: %d\n", ret);
break;
}
}
@@ -1317,25 +1427,26 @@ static int es8388_start(FAR struct audio_lowerhalf_s
*dev)
if (priv->audio_mode == ES8388_MODULE_LINE)
{
es8388_writereg(priv, ES8388_DACCONTROL16,
- ES8388_RMIXSEL_RIN2 | ES8388_LMIXSEL_LIN2);
+ ES8388_RMIXSEL_RIN2 |
+ ES8388_LMIXSEL_LIN2);
es8388_writereg(priv, ES8388_DACCONTROL17,
- ES8388_LI2LO_ENABLE |
- ES8388_LD2LO_DISABLE |
- ES8388_LI2LOVOL(ES8388_MIXER_GAIN_0DB));
+ ES8388_LI2LOVOL(ES8388_MIXER_GAIN_0DB) |
+ ES8388_LI2LO_ENABLE |
+ ES8388_LD2LO_DISABLE);
es8388_writereg(priv, ES8388_DACCONTROL20,
- ES8388_RI2RO_ENABLE |
- ES8388_RD2RO_DISABLE |
- ES8388_RI2ROVOL(ES8388_MIXER_GAIN_0DB));
+ ES8388_RI2ROVOL(ES8388_MIXER_GAIN_0DB) |
+ ES8388_RI2RO_ENABLE |
+ ES8388_RD2RO_DISABLE);
es8388_writereg(priv, ES8388_DACCONTROL21,
ES8388_DAC_DLL_PWD_NORMAL |
ES8388_ADC_DLL_PWD_NORMAL |
ES8388_MCLK_DIS_NORMAL |
ES8388_OFFSET_DIS_DISABLE |
- ES8388_SLRCK_SAME |
- ES8388_LRCK_SEL_ADC);
+ ES8388_LRCK_SEL_ADC |
+ ES8388_SLRCK_SAME);
}
else
{
@@ -1344,8 +1455,8 @@ static int es8388_start(FAR struct audio_lowerhalf_s *dev)
ES8388_ADC_DLL_PWD_NORMAL |
ES8388_MCLK_DIS_NORMAL |
ES8388_OFFSET_DIS_DISABLE |
- ES8388_SLRCK_SAME |
- ES8388_LRCK_SEL_DAC);
+ ES8388_LRCK_SEL_DAC |
+ ES8388_SLRCK_SAME);
}
regval = es8388_readreg(priv, ES8388_DACCONTROL21);
@@ -1399,10 +1510,12 @@ static int es8388_start(FAR struct audio_lowerhalf_s
*dev)
ES8388_LOUT1_ENABLE |
ES8388_PDNDACR_PWRUP |
ES8388_PDNDACL_PWRUP);
-
- es8388_setmute(priv, false);
}
+#ifndef CONFIG_AUDIO_EXCLUDE_MUTE
+ es8388_setmute(priv, priv->audio_mode, false);
+#endif
+
/* Create a message queue for the worker thread */
snprintf(priv->mqname, sizeof(priv->mqname), "/regconfig/%" PRIXPTR,
@@ -1419,7 +1532,7 @@ static int es8388_start(FAR struct audio_lowerhalf_s *dev)
{
/* Error creating message queue! */
- auderr("ERROR: Couldn't allocate message queue\n");
+ auderr("Couldn't allocate message queue\n");
return ret;
}
@@ -1431,7 +1544,7 @@ static int es8388_start(FAR struct audio_lowerhalf_s *dev)
pthread_join(priv->threadid, &value);
}
- /* Start our thread for sending data to the device */
+ /* Start our thread for processing device data */
pthread_attr_init(&tattr);
sparam.sched_priority = sched_get_priority_max(SCHED_FIFO) - 3;
@@ -1443,7 +1556,7 @@ static int es8388_start(FAR struct audio_lowerhalf_s *dev)
(pthread_addr_t)priv);
if (ret != OK)
{
- auderr("ERROR: pthread_create failed: %d\n", ret);
+ auderr("pthread_create failed: %d\n", ret);
}
else
{
@@ -1489,21 +1602,22 @@ static int es8388_stop(FAR struct audio_lowerhalf_s
*dev)
ES8388_ADC_DLL_PWD_NORMAL |
ES8388_MCLK_DIS_NORMAL |
ES8388_OFFSET_DIS_DISABLE |
- ES8388_SLRCK_SAME |
- ES8388_LRCK_SEL_DAC);
+ ES8388_LRCK_SEL_DAC |
+ ES8388_SLRCK_SAME);
es8388_writereg(priv, ES8388_DACCONTROL16,
- ES8388_RMIXSEL_RIN1 | ES8388_LMIXSEL_LIN1);
+ ES8388_RMIXSEL_RIN1 |
+ ES8388_LMIXSEL_LIN1);
es8388_writereg(priv, ES8388_DACCONTROL17,
- ES8388_LD2LO_ENABLE |
- ES8388_LI2LO_DISABLE |
- ES8388_LI2LOVOL(ES8388_MIXER_GAIN_0DB));
+ ES8388_LI2LOVOL(ES8388_MIXER_GAIN_0DB) |
+ ES8388_LI2LO_DISABLE |
+ ES8388_LD2LO_ENABLE);
es8388_writereg(priv, ES8388_DACCONTROL20,
- ES8388_RD2RO_ENABLE |
- ES8388_RI2RO_DISABLE |
- ES8388_RI2ROVOL(ES8388_MIXER_GAIN_0DB));
+ ES8388_RI2ROVOL(ES8388_MIXER_GAIN_0DB) |
+ ES8388_RI2RO_DISABLE |
+ ES8388_RD2RO_ENABLE);
goto stop_msg;
}
@@ -1518,8 +1632,6 @@ static int es8388_stop(FAR struct audio_lowerhalf_s *dev)
ES8388_LOUT1_DISABLE |
ES8388_PDNDACR_PWRUP |
ES8388_PDNDACL_PWRUP);
-
- es8388_setmute(priv, true);
}
if (priv->audio_mode == ES8388_MODULE_ADC ||
@@ -1549,6 +1661,10 @@ static int es8388_stop(FAR struct audio_lowerhalf_s *dev)
stop_msg:
+#ifndef CONFIG_AUDIO_EXCLUDE_MUTE
+ es8388_setmute(priv, priv->audio_mode, true);
+#endif
+
/* Send a message to stop all audio streaming */
term_msg.msg_id = AUDIO_MSG_STOP;
@@ -1595,7 +1711,9 @@ static int es8388_pause(FAR struct audio_lowerhalf_s *dev)
if (priv->running && !priv->paused)
{
priv->paused = true;
- es8388_setmute(priv, true);
+#ifndef CONFIG_AUDIO_EXCLUDE_MUTE
+ es8388_setmute(priv, priv->audio_mode, true);
+#endif
}
return OK;
@@ -1631,8 +1749,10 @@ static int es8388_resume(FAR struct audio_lowerhalf_s
*dev)
if (priv->running && priv->paused)
{
priv->paused = false;
- es8388_setmute(priv, false);
- es8388_sendbuffer(priv);
+#ifndef CONFIG_AUDIO_EXCLUDE_MUTE
+ es8388_setmute(priv, priv->audio_mode, false);
+#endif
+ es8388_processbegin(priv);
}
return OK;
@@ -1642,7 +1762,8 @@ static int es8388_resume(FAR struct audio_lowerhalf_s
*dev)
/****************************************************************************
* Name: es8388_enqueuebuffer
*
- * Description: Enqueue an Audio Pipeline Buffer for playback/ processing.
+ * Description:
+ * Enqueue an Audio Pipeline Buffer for processing.
*
* Input Parameters:
* dev - A reference to the lower half state structure.
@@ -1675,7 +1796,6 @@ static int es8388_enqueuebuffer(FAR struct
audio_lowerhalf_s *dev,
/* Add the new buffer to the tail of pending audio buffers */
- apb->flags |= AUDIO_APB_OUTPUT_ENQUEUED;
dq_addlast(&apb->dq_entry, &priv->pendq);
nxmutex_unlock(&priv->pendlock);
@@ -1695,7 +1815,7 @@ static int es8388_enqueuebuffer(FAR struct
audio_lowerhalf_s *dev,
sizeof(term_msg), CONFIG_ES8388_MSG_PRIO);
if (ret < 0)
{
- auderr("ERROR: file_mq_send failed: %d\n", ret);
+ auderr("file_mq_send failed: %d\n", ret);
}
}
@@ -1750,7 +1870,7 @@ static int es8388_ioctl(FAR struct audio_lowerhalf_s
*dev, int cmd,
switch (cmd)
{
- /* Report our preferred buffer size and quantity */
+ /* Report our preferred buffer size and quantity */
#ifdef CONFIG_AUDIO_DRIVER_SPECIFIC_BUFFERS
case AUDIOIOC_GETBUFFERINFO:
@@ -1765,7 +1885,7 @@ static int es8388_ioctl(FAR struct audio_lowerhalf_s
*dev, int cmd,
default:
ret = -ENOTTY;
- audwarn("IOCTL not available\n");
+ audinfo("Unhandled ioctl: %d\n", cmd);
break;
}
@@ -1914,8 +2034,6 @@ static void es8388_audio_output(FAR struct es8388_dev_s
*priv)
*
****************************************************************************/
-#if 0
-
static void es8388_audio_input(FAR struct es8388_dev_s *priv)
{
audinfo("ES8388 set to input mode\n");
@@ -1923,8 +2041,6 @@ static void es8388_audio_input(FAR struct es8388_dev_s
*priv)
priv->audio_mode = ES8388_MODULE_ADC;
}
-#endif
-
/****************************************************************************
* Name: es8388_workerthread
*
@@ -1974,9 +2090,9 @@ static void *es8388_workerthread(pthread_addr_t pvarg)
}
else
{
- /* Check if we can send more audio buffers to the ES8388 */
+ /* Check if we can process more audio buffers */
- es8388_sendbuffer(priv);
+ es8388_processbegin(priv);
}
/* Wait for messages from our message queue */
@@ -1988,7 +2104,7 @@ static void *es8388_workerthread(pthread_addr_t pvarg)
if (msglen < sizeof(struct audio_msg_s))
{
- auderr("ERROR: Message too small: %d\n", msglen);
+ auderr("Message too small: %d\n", msglen);
continue;
}
@@ -2016,7 +2132,7 @@ static void *es8388_workerthread(pthread_addr_t pvarg)
break;
#endif
- /* We have a new buffer to send. We will catch this case at
+ /* We have a new buffer to process. We will catch this case at
* the top of the loop.
*/
@@ -2032,7 +2148,7 @@ static void *es8388_workerthread(pthread_addr_t pvarg)
break;
default:
- auderr("ERROR: Ignoring message ID %d\n", msg.msg_id);
+ auderr("Ignoring message ID %d\n", msg.msg_id);
break;
}
}
@@ -2098,12 +2214,12 @@ static void *es8388_workerthread(pthread_addr_t pvarg)
static void es8388_reset(FAR struct es8388_dev_s *priv)
{
- /* Put audio output back to its initial configuration */
+ /* Put audio back to its initial configuration */
- audinfo("ES8388 Reset\n");
+ audinfo("ES8388 reset triggered.\n");
- priv->dac_output = ES8388_DAC_OUTPUT_ALL;
- priv->adc_input = ES8388_ADC_INPUT_ALL;
+ priv->dac_output = CONFIG_ES8388_OUTPUT_CHANNEL;
+ priv->adc_input = CONFIG_ES8388_INPUT_CHANNEL;
priv->samprate = ES8388_DEFAULT_SAMPRATE;
priv->nchannels = ES8388_DEFAULT_NCHANNELS;
priv->bpsamp = ES8388_DEFAULT_BPSAMP;
@@ -2117,8 +2233,6 @@ static void es8388_reset(FAR struct es8388_dev_s *priv)
uint8_t regconfig;
- es8388_audio_output(priv);
-
es8388_writereg(priv, ES8388_DACCONTROL3,
ES8388_DACMUTE_MUTED |
ES8388_DACLER_NORMAL |
@@ -2135,7 +2249,7 @@ static void es8388_reset(FAR struct es8388_dev_s *priv)
(1 << 6)); /* Default value of undocumented bit */
es8388_writereg(priv, ES8388_CHIPPOWER,
- ES8388_DACVREF_PDN_SHIFT |
+ ES8388_DACVREF_PDN_PWRUP |
ES8388_ADCVREF_PDN_PWRUP |
ES8388_DACDLL_PDN_NORMAL |
ES8388_ADCDLL_PDN_NORMAL |
@@ -2144,6 +2258,12 @@ static void es8388_reset(FAR struct es8388_dev_s *priv)
ES8388_DAC_DIGPDN_NORMAL |
ES8388_ADC_DIGPDN_NORMAL);
+ /* Disable the internal DLL to improve 8K sample rate */
+
+ es8388_writereg(priv, 0x35, 0xa0);
+ es8388_writereg(priv, 0x37, 0xd0);
+ es8388_writereg(priv, 0x39, 0xd0);
+
es8388_writereg(priv, ES8388_MASTERMODE,
ES8388_BCLKDIV(ES8388_MCLK_DIV_AUTO) |
ES8388_BCLK_INV_NORMAL |
@@ -2158,6 +2278,15 @@ static void es8388_reset(FAR struct es8388_dev_s *priv)
ES8388_PDNDACR_PWRDN |
ES8388_PDNDACL_PWRDN);
+ es8388_writereg(priv, ES8388_CONTROL1,
+ ES8388_VMIDSEL_500K |
+ ES8388_ENREF_DISABLE |
+ ES8388_SEQEN_DISABLE |
+ ES8388_SAMEFS_SAME |
+ ES8388_DACMCLK_ADCMCLK |
+ ES8388_LRCM_ISOLATED |
+ ES8388_SCPRESET_NORMAL);
+
es8388_writereg(priv, ES8388_DACCONTROL1,
ES8388_DACFORMAT(ES8388_I2S_NORMAL) |
ES8388_DACWL(ES8388_WORD_LENGTH_16BITS) |
@@ -2172,22 +2301,22 @@ static void es8388_reset(FAR struct es8388_dev_s *priv)
ES8388_RMIXSEL_RIN1 | ES8388_LMIXSEL_LIN1);
es8388_writereg(priv, ES8388_DACCONTROL17,
- ES8388_LD2LO_ENABLE |
- ES8388_LI2LO_DISABLE |
- ES8388_LI2LOVOL(ES8388_MIXER_GAIN_0DB));
+ ES8388_LI2LOVOL(ES8388_MIXER_GAIN_0DB) |
+ ES8388_LI2LO_DISABLE |
+ ES8388_LD2LO_ENABLE);
es8388_writereg(priv, ES8388_DACCONTROL20,
- ES8388_RD2RO_ENABLE |
- ES8388_RI2RO_DISABLE |
- ES8388_RI2ROVOL(ES8388_MIXER_GAIN_0DB));
+ ES8388_RI2ROVOL(ES8388_MIXER_GAIN_0DB) |
+ ES8388_RI2RO_DISABLE |
+ ES8388_RD2RO_ENABLE);
es8388_writereg(priv, ES8388_DACCONTROL21,
ES8388_DAC_DLL_PWD_NORMAL |
ES8388_ADC_DLL_PWD_NORMAL |
ES8388_MCLK_DIS_NORMAL |
ES8388_OFFSET_DIS_DISABLE |
- ES8388_SLRCK_SAME |
- ES8388_LRCK_SEL_DAC);
+ ES8388_LRCK_SEL_DAC |
+ ES8388_SLRCK_SAME);
es8388_writereg(priv, ES8388_DACCONTROL23, ES8388_VROI_1_5K);
@@ -2203,9 +2332,13 @@ static void es8388_reset(FAR struct es8388_dev_s *priv)
es8388_writereg(priv, ES8388_DACCONTROL27,
ES8388_ROUT2VOL(ES8388_DAC_CHVOL_DB(0)));
- es8388_setmute(priv, true);
+#ifndef CONFIG_AUDIO_EXCLUDE_MUTE
+ es8388_setmute(priv, ES8388_MODULE_DAC, true);
+#endif
- regconfig = 0;
+#ifndef CONFIG_AUDIO_EXCLUDE_VOLUME
+ es8388_setvolume(priv, ES8388_MODULE_DAC, CONFIG_ES8388_OUTPUT_INITVOLUME);
+#endif
if (priv->dac_output == ES8388_DAC_OUTPUT_LINE2)
{
@@ -2233,11 +2366,7 @@ static void es8388_reset(FAR struct es8388_dev_s *priv)
ES8388_PDNAINR_PWRDN |
ES8388_PDNAINL_PWRDN);
- es8388_writereg(priv, ES8388_ADCCONTROL1,
- ES8388_MICAMPR(ES8388_MIC_GAIN_0DB) |
- ES8388_MICAMPL(ES8388_MIC_GAIN_0DB));
-
- regconfig = 0;
+ es8388_setmicgain(priv, 24); /* +24 dB */
if (priv->adc_input == ES8388_ADC_INPUT_LINE1)
{
@@ -2255,10 +2384,10 @@ static void es8388_reset(FAR struct es8388_dev_s *priv)
es8388_writereg(priv, ES8388_ADCCONTROL2, regconfig);
es8388_writereg(priv, ES8388_ADCCONTROL3,
- ES8388_TRI_NORMAL |
- ES8388_MONOMIX_STEREO |
- ES8388_DS_LINPUT1_RINPUT1 |
- (1 << 1)); /* Default value of undocumented bit */
+ (1 << 1) | /* Default value of undocumented bit
*/
+ ES8388_TRI_NORMAL |
+ ES8388_MONOMIX_STEREO |
+ ES8388_DS_LINPUT1_RINPUT1);
es8388_writereg(priv, ES8388_ADCCONTROL4,
ES8388_ADCFORMAT(ES8388_I2S_NORMAL) |
@@ -2270,6 +2399,14 @@ static void es8388_reset(FAR struct es8388_dev_s *priv)
ES8388_ADCFSRATIO(ES8388_LCLK_DIV_256) |
ES8388_ADCFSMODE_SINGLE);
+#ifndef CONFIG_AUDIO_EXCLUDE_VOLUME
+ es8388_setvolume(priv, ES8388_MODULE_ADC, CONFIG_ES8388_INPUT_INITVOLUME);
+#endif
+
+#ifndef CONFIG_AUDIO_EXCLUDE_MUTE
+ es8388_setmute(priv, ES8388_MODULE_ADC, true);
+#endif
+
es8388_writereg(priv, ES8388_ADCPOWER,
ES8388_INT1LP_LP |
ES8388_FLASHLP_NORMAL |
@@ -2318,8 +2455,6 @@ static void es8388_reset(FAR struct es8388_dev_s *priv)
ES8388_LOUT1_DISABLE |
ES8388_PDNDACR_PWRUP |
ES8388_PDNDACL_PWRUP);
-
- es8388_setmute(priv, true);
}
if (priv->audio_mode == ES8388_MODULE_ADC ||
@@ -2350,7 +2485,11 @@ static void es8388_reset(FAR struct es8388_dev_s *priv)
reset_finish:
#ifndef CONFIG_AUDIO_EXCLUDE_VOLUME
- es8388_setvolume(priv, CONFIG_ES8388_OUTPUT_INITVOLUME);
+ es8388_setvolume(priv, ES8388_MODULE_DAC, CONFIG_ES8388_OUTPUT_INITVOLUME);
+#endif
+
+#ifndef CONFIG_AUDIO_EXCLUDE_MUTE
+ es8388_setmute(priv, ES8388_MODULE_DAC, true);
#endif
es8388_dump_registers(&priv->dev, "After reset");
@@ -2412,11 +2551,10 @@ FAR struct audio_lowerhalf_s *
es8388_dump_registers(&priv->dev, "Before reset");
+ es8388_audio_output(priv);
es8388_reset(priv);
return &priv->dev;
}
- nxmutex_destroy(&priv->pendlock);
- kmm_free(priv);
return NULL;
}
diff --git a/drivers/audio/es8388.h b/drivers/audio/es8388.h
index 17b4c68e55..4577bba118 100644
--- a/drivers/audio/es8388.h
+++ b/drivers/audio/es8388.h
@@ -1072,10 +1072,10 @@ struct es8388_dev_s
FAR const struct es8388_lower_s *lower; /* Pointer to the
board lower functions */
FAR struct i2c_master_s *i2c; /* I2C driver to use */
FAR struct i2s_dev_s *i2s; /* I2S driver to use */
- struct dq_queue_s pendq; /* Queue of pending
buffers to be sent */
+ struct dq_queue_s pendq; /* Queue of pending
buffers to be processed */
struct dq_queue_s doneq; /* Queue of sent
buffers to be returned */
struct file mq; /* Message queue for
receiving messages */
- char mqname[16]; /* Our message queue
name */
+ char mqname[NAME_MAX]; /* Our message queue
name */
pthread_t threadid; /* ID of our thread */
uint32_t bitrate; /* Actual programmed
bit rate */
mutex_t pendlock; /* Protect pendq */
@@ -1084,7 +1084,8 @@ struct es8388_dev_s
#ifndef CONFIG_AUDIO_EXCLUDE_BALANCE
uint16_t balance; /* Current balance
level {0..1000} */
#endif /* CONFIG_AUDIO_EXCLUDE_BALANCE */
- uint16_t volume; /* Current volume
level {0..1000} */
+ uint16_t volume_out; /* Current output
volume level {0..1000} */
+ uint16_t volume_in; /* Current input
volume level {0..1000} */
#endif /* CONFIG_AUDIO_EXCLUDE_VOLUME */
uint8_t nchannels; /* Number of channels
(1 or 2) */
uint8_t bpsamp; /* Bits per sample */
@@ -1100,6 +1101,7 @@ struct es8388_dev_s
es8388_module_t audio_mode; /* The current audio
mode of the ES8388 chip */
es8388_dac_output_t dac_output; /* The current output
of the ES8388 DAC */
es8388_adc_input_t adc_input; /* The current input
of the ES8388 ADC */
+ es8388_mic_gain_t mic_gain; /* The current
microphone gain */
uint32_t mclk; /* The current MCLK
frequency */
};
diff --git a/include/nuttx/audio/audio.h b/include/nuttx/audio/audio.h
index eaf5d8b888..e4d9f5f4c2 100644
--- a/include/nuttx/audio/audio.h
+++ b/include/nuttx/audio/audio.h
@@ -240,9 +240,7 @@
*/
#define AUDIO_VOLUME_MAX 1000
-#define AUDIO_VOLUME_MAX_FLOAT 1000.0f
#define AUDIO_VOLUME_MIN 0
-#define AUDIO_VOLUME_MIN_FLOAT 0.0f
/* Audio Balance Limits *****************************************************/
@@ -252,11 +250,8 @@
*/
#define AUDIO_BALANCE_RIGHT 1000
-#define AUDIO_BALANCE_RIGHT_FLOAT 1000.0f
#define AUDIO_BALANCE_CENTER 500
-#define AUDIO_BALANCE_CENTER_FLOAT 500.0f
#define AUDIO_BALANCE_LEFT 0
-#define AUDIO_BALANCE_LEFT_FLOAT 0.0f
/* Supported Feature Units controls *****************************************/
