Audio: TWS+ mono mode support
Enable mono mode support when one TWS+ earbud is connected.
Change the encoder config when device switches from two earbuds to
single earbud.
CRs-Fixed: 2341876
Change-Id: Iaf74fbb6d33451d65a8ab83d53479ad2f32167c8
diff --git a/hal/audio_extn/a2dp.c b/hal/audio_extn/a2dp.c
index 17ba960..634e0b4 100644
--- a/hal/audio_extn/a2dp.c
+++ b/hal/audio_extn/a2dp.c
@@ -84,6 +84,7 @@
#define MIXER_ENC_FMT_SBC "SBC"
#define MIXER_ENC_FMT_AAC "AAC"
#define MIXER_ENC_FMT_APTX "APTX"
+#define MIXER_FMT_TWS_CHANNEL_MODE "TWS Channel Mode"
#define MIXER_ENC_FMT_APTXHD "APTXHD"
#define MIXER_ENC_FMT_NONE "NONE"
#define ENCODER_LATENCY_SBC 10
@@ -173,6 +174,7 @@
typedef int (*audio_check_a2dp_ready_t)(void);
typedef uint16_t (*audio_get_a2dp_sink_latency_t)(void);
typedef int (*audio_is_scrambling_enabled_t)(void);
+typedef bool (*audio_is_tws_mono_mode_enable_t)(void);
enum A2DP_STATE {
A2DP_STATE_CONNECTED,
@@ -235,6 +237,7 @@
audio_check_a2dp_ready_t audio_check_a2dp_ready;
audio_get_a2dp_sink_latency_t audio_get_a2dp_sink_latency;
audio_is_scrambling_enabled_t audio_is_scrambling_enabled;
+ audio_is_tws_mono_mode_enable_t audio_is_tws_mono_mode_enable;
enum A2DP_STATE bt_state;
enc_codec_t bt_encoder_format;
uint32_t enc_sampling_rate;
@@ -245,6 +248,8 @@
bool is_a2dp_offload_supported;
bool is_handoff_in_progress;
bool is_aptx_dual_mono_supported;
+ /* Mono Mode support for TWS+ */
+ bool is_tws_mono_mode_on;
bool is_aptx_adaptive;
/* Adaptive bitrate config for A2DP codecs */
struct a2dp_abr_config abr_config;
@@ -758,6 +763,8 @@
dlsym(a2dp.bt_lib_handle,"audio_get_a2dp_sink_latency");
a2dp.audio_is_scrambling_enabled = (audio_is_scrambling_enabled_t)
dlsym(a2dp.bt_lib_handle,"audio_is_scrambling_enabled");
+ a2dp.audio_is_tws_mono_mode_enable = (audio_is_tws_mono_mode_enable_t)
+ dlsym(a2dp.bt_lib_handle,"isTwsMonomodeEnable");
}
}
@@ -1206,6 +1213,26 @@
return ret;
}
+
+static void audio_a2dp_update_tws_channel_mode()
+{
+ char* channel_mode;
+ struct mixer_ctl *ctl_channel_mode;
+ if (a2dp.is_tws_mono_mode_on)
+ channel_mode = "One";
+ else
+ channel_mode = "Two";
+ ctl_channel_mode = mixer_get_ctl_by_name(a2dp.adev->mixer,MIXER_FMT_TWS_CHANNEL_MODE);
+ if (!ctl_channel_mode) {
+ ALOGE("failed to get tws mixer ctl");
+ return;
+ }
+ if (mixer_ctl_set_enum_by_string(ctl_channel_mode, channel_mode) != 0) {
+ ALOGE("%s: Failed to set the channel mode = %s", __func__, channel_mode);
+ return;
+ }
+}
+
static int update_aptx_dsp_config_v2(struct aptx_enc_cfg_t *aptx_dsp_cfg,
audio_aptx_encoder_config *aptx_bt_cfg)
{
@@ -1235,8 +1262,15 @@
break;
case 2:
default:
- aptx_dsp_cfg->custom_cfg.channel_mapping[0] = PCM_CHANNEL_L;
- aptx_dsp_cfg->custom_cfg.channel_mapping[1] = PCM_CHANNEL_R;
+ if (!a2dp.is_tws_mono_mode_on) {
+ aptx_dsp_cfg->custom_cfg.channel_mapping[0] = PCM_CHANNEL_L;
+ aptx_dsp_cfg->custom_cfg.channel_mapping[1] = PCM_CHANNEL_R;
+ }
+ else {
+ a2dp.is_tws_mono_mode_on = true;
+ ALOGD("Update tws for mono_mode_on: %d",a2dp.is_tws_mono_mode_on);
+ audio_a2dp_update_tws_channel_mode();
+ }
break;
}
a2dp.enc_channels = aptx_dsp_cfg->custom_cfg.num_channels;
@@ -1665,6 +1699,8 @@
case ENC_CODEC_TYPE_APTX_DUAL_MONO:
ALOGD(" Received APTX dual mono encoder supported BT device");
a2dp.is_aptx_dual_mono_supported = true;
+ if (a2dp.audio_is_tws_mono_mode_enable != NULL)
+ a2dp.is_tws_mono_mode_on = a2dp.audio_is_tws_mono_mode_enable();
aptx_encoder_cfg.dual_mono_cfg = (audio_aptx_dual_mono_config *)codec_info;
is_configured =
configure_aptx_enc_format(&aptx_encoder_cfg);
@@ -1765,8 +1801,9 @@
{
int ret =0;
- struct mixer_ctl *ctl_enc_config, *ctrl_bit_format;
+ struct mixer_ctl *ctl_enc_config, *ctrl_bit_format, *ctl_channel_mode;
struct sbc_enc_cfg_t dummy_reset_config;
+ char* channel_mode;
memset(&dummy_reset_config, 0x0, sizeof(struct sbc_enc_cfg_t));
ctl_enc_config = mixer_get_ctl_by_name(a2dp.adev->mixer,
@@ -1788,6 +1825,17 @@
ALOGE("%s: Failed to set bit format to encoder", __func__);
}
}
+ ctl_channel_mode = mixer_get_ctl_by_name(a2dp.adev->mixer,MIXER_FMT_TWS_CHANNEL_MODE);
+
+ if (!ctl_channel_mode) {
+ ALOGE("failed to get tws mixer ctl");
+ } else {
+ channel_mode = "Two";
+ if (mixer_ctl_set_enum_by_string(ctl_channel_mode, channel_mode) != 0) {
+ ALOGE("%s: Failed to set the channel mode = %s", __func__, channel_mode);
+ }
+ a2dp.is_tws_mono_mode_on = false;
+ }
}
static int reset_a2dp_dec_config_params()
@@ -1892,6 +1940,17 @@
goto param_handled;
}
+ ret = str_parms_get_str(parms, "TwsChannelConfig", value, sizeof(value));
+ if (ret>=0) {
+ ALOGD("Setting tws channel mode to %s",value);
+ if(!(strncmp(value,"mono",strlen(value))))
+ a2dp.is_tws_mono_mode_on = true;
+ else if(!(strncmp(value,"dual-mono",strlen(value))))
+ a2dp.is_tws_mono_mode_on = false;
+ audio_a2dp_update_tws_channel_mode();
+ goto param_handled;
+ }
+
ret = str_parms_get_str(parms, "A2dpSuspended", value, sizeof(value));
if (ret >= 0) {
if (a2dp.bt_lib_handle) {
@@ -2023,6 +2082,7 @@
a2dp.abr_config.abr_started = false;
a2dp.abr_config.imc_instance = 0;
a2dp.abr_config.abr_tx_handle = NULL;
+ a2dp.is_tws_mono_mode_on = false;
reset_a2dp_enc_config_params();
reset_a2dp_dec_config_params();
update_offload_codec_capabilities();