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example/sco_demo_util: use generic audio_input_prebuffer_bytes

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This commit is contained in:
Matthias Ringwald 2023-02-27 16:01:13 +01:00
parent 3cf06407e6
commit b150a47954
1 changed files with 23 additions and 21 deletions
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44
example/sco_demo_util.c
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@ -79,23 +79,20 @@
#define SCO_WAV_FILENAME "sco_input.wav" #define SCO_WAV_FILENAME "sco_input.wav"
#endif #endif
// pre-buffer for CVSD and mSBC - also defines latency
#define SCO_CVSD_PA_PREBUFFER_MS 50
#define SCO_MSBC_PA_PREBUFFER_MS 50
// constants // constants
#define NUM_CHANNELS 1 #define NUM_CHANNELS 1
#define CVSD_SAMPLE_RATE 8000 #define SAMPLE_RATE_8KHZ 8000
#define MSBC_SAMPLE_RATE 16000 #define SAMPLE_RATE_16KHZ 16000
#define BYTES_PER_FRAME 2 #define BYTES_PER_FRAME 2
#define CVSD_PA_PREBUFFER_BYTES (SCO_CVSD_PA_PREBUFFER_MS * CVSD_SAMPLE_RATE/1000 * BYTES_PER_FRAME) // pre-buffer for CVSD and mSBC - also defines latency
#define MSBC_PA_PREBUFFER_BYTES (SCO_MSBC_PA_PREBUFFER_MS * MSBC_SAMPLE_RATE/1000 * BYTES_PER_FRAME) #define SCO_PREBUFFER_MS 50
#define PREBUFFER_BYTES_8KHZ (SCO_PREBUFFER_MS * SAMPLE_RATE_8KHZ/1000 * BYTES_PER_FRAME)
#define PREBUFFER_BYTES_16KHZ (SCO_PREBUFFER_MS * SAMPLE_RATE_16KHZ/1000 * BYTES_PER_FRAME)
// output // output
static int audio_output_paused = 0; static int audio_output_paused = 0;
static uint8_t audio_output_ring_buffer_storage[2*MSBC_PA_PREBUFFER_BYTES]; static uint8_t audio_output_ring_buffer_storage[2 * PREBUFFER_BYTES_16KHZ];
static btstack_ring_buffer_t audio_output_ring_buffer; static btstack_ring_buffer_t audio_output_ring_buffer;
// input // input
@ -106,7 +103,8 @@ static btstack_ring_buffer_t audio_output_ring_buffer;
static void (*sco_demo_audio_generator)(uint16_t num_samples, int16_t * data); static void (*sco_demo_audio_generator)(uint16_t num_samples, int16_t * data);
#endif #endif
static int audio_input_paused = 0; static int audio_input_paused = 0;
static uint8_t audio_input_ring_buffer_storage[2*8000]; // full second input buffer static uint16_t audio_input_prebuffer_bytes;
static uint8_t audio_input_ring_buffer_storage[2 * PREBUFFER_BYTES_16KHZ];
static btstack_ring_buffer_t audio_input_ring_buffer; static btstack_ring_buffer_t audio_input_ring_buffer;
static int count_sent = 0; static int count_sent = 0;
@ -173,11 +171,11 @@ static void audio_playback_callback(int16_t * buffer, uint16_t num_samples){
uint32_t prebuffer_bytes; uint32_t prebuffer_bytes;
switch (negotiated_codec){ switch (negotiated_codec){
case HFP_CODEC_MSBC: case HFP_CODEC_MSBC:
prebuffer_bytes = MSBC_PA_PREBUFFER_BYTES; prebuffer_bytes = PREBUFFER_BYTES_16KHZ;
break; break;
case HFP_CODEC_CVSD: case HFP_CODEC_CVSD:
default: default:
prebuffer_bytes = CVSD_PA_PREBUFFER_BYTES; prebuffer_bytes = PREBUFFER_BYTES_8KHZ;
break; break;
} }
@ -268,12 +266,14 @@ static void sco_demo_init_CVSD(void){
btstack_cvsd_plc_init(&cvsd_plc_state); btstack_cvsd_plc_init(&cvsd_plc_state);
audio_input_prebuffer_bytes = PREBUFFER_BYTES_8KHZ;
#ifdef SCO_WAV_FILENAME #ifdef SCO_WAV_FILENAME
num_samples_to_write = CVSD_SAMPLE_RATE * SCO_WAV_DURATION_IN_SECONDS; num_samples_to_write = SAMPLE_RATE_8KHZ * SCO_WAV_DURATION_IN_SECONDS;
wav_writer_open(SCO_WAV_FILENAME, 1, CVSD_SAMPLE_RATE); wav_writer_open(SCO_WAV_FILENAME, 1, SAMPLE_RATE_8KHZ);
#endif #endif
audio_initialize(CVSD_SAMPLE_RATE); audio_initialize(SAMPLE_RATE_8KHZ);
} }
static void sco_demo_receive_CVSD(uint8_t * packet, uint16_t size){ static void sco_demo_receive_CVSD(uint8_t * packet, uint16_t size){
@ -330,7 +330,7 @@ void sco_demo_fill_payload_CVSD(uint8_t * payload_buffer, uint16_t sco_payload_l
// resume if pre-buffer is filled // resume if pre-buffer is filled
if (audio_input_paused){ if (audio_input_paused){
if (btstack_ring_buffer_bytes_available(&audio_input_ring_buffer) >= CVSD_PA_PREBUFFER_BYTES){ if (btstack_ring_buffer_bytes_available(&audio_input_ring_buffer) >= audio_input_prebuffer_bytes){
// resume sending // resume sending
audio_input_paused = 0; audio_input_paused = 0;
} }
@ -396,12 +396,14 @@ static void sco_demo_init_mSBC(void){
btstack_sbc_decoder_init(&decoder_state, SBC_MODE_mSBC, &handle_pcm_data, NULL); btstack_sbc_decoder_init(&decoder_state, SBC_MODE_mSBC, &handle_pcm_data, NULL);
hfp_msbc_init(); hfp_msbc_init();
audio_input_prebuffer_bytes = PREBUFFER_BYTES_16KHZ;
#ifdef SCO_WAV_FILENAME #ifdef SCO_WAV_FILENAME
num_samples_to_write = MSBC_SAMPLE_RATE * SCO_WAV_DURATION_IN_SECONDS; num_samples_to_write = SAMPLE_RATE_16KHZ * SCO_WAV_DURATION_IN_SECONDS;
wav_writer_open(SCO_WAV_FILENAME, 1, MSBC_SAMPLE_RATE); wav_writer_open(SCO_WAV_FILENAME, 1, SAMPLE_RATE_16KHZ);
#endif #endif
audio_initialize(MSBC_SAMPLE_RATE); audio_initialize(SAMPLE_RATE_16KHZ);
} }
static void sco_demo_receive_mSBC(uint8_t * packet, uint16_t size){ static void sco_demo_receive_mSBC(uint8_t * packet, uint16_t size){
@ -425,7 +427,7 @@ void sco_demo_fill_payload_mSBC(uint8_t * payload_buffer, uint16_t sco_payload_l
// resume if pre-buffer is filled // resume if pre-buffer is filled
if (audio_input_paused){ if (audio_input_paused){
if (btstack_ring_buffer_bytes_available(&audio_input_ring_buffer) >= MSBC_PA_PREBUFFER_BYTES){ if (btstack_ring_buffer_bytes_available(&audio_input_ring_buffer) >= audio_input_prebuffer_bytes){
// resume sending // resume sending
audio_input_paused = 0; audio_input_paused = 0;
} }