mirror/btstack
1
0
Fork 0
mirror of https://github.com/bluekitchen/btstack.git synced 2025-01-30 06:32:43 +00:00
Code Issues Packages Projects Releases Wiki Activity

example/sco_demo_util: use generic audio_input_prebuffer_bytes

Browse Source
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

44
example/sco_demo_util.c
View File

@ -79,23 +79,20 @@
#define SCO_WAV_FILENAME "sco_input.wav"
#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
#define NUM_CHANNELS 1
#define CVSD_SAMPLE_RATE 8000
#define MSBC_SAMPLE_RATE 16000
#define SAMPLE_RATE_8KHZ 8000
#define SAMPLE_RATE_16KHZ 16000
#define BYTES_PER_FRAME 2
#define CVSD_PA_PREBUFFER_BYTES (SCO_CVSD_PA_PREBUFFER_MS * CVSD_SAMPLE_RATE/1000 * BYTES_PER_FRAME)
#define MSBC_PA_PREBUFFER_BYTES (SCO_MSBC_PA_PREBUFFER_MS * MSBC_SAMPLE_RATE/1000 * BYTES_PER_FRAME)
// pre-buffer for CVSD and mSBC - also defines latency
#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
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;
// 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);
#endif
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 int count_sent = 0;
@ -173,11 +171,11 @@ static void audio_playback_callback(int16_t * buffer, uint16_t num_samples){
uint32_t prebuffer_bytes;
switch (negotiated_codec){
case HFP_CODEC_MSBC:
prebuffer_bytes = MSBC_PA_PREBUFFER_BYTES;
prebuffer_bytes = PREBUFFER_BYTES_16KHZ;
break;
case HFP_CODEC_CVSD:
default:
prebuffer_bytes = CVSD_PA_PREBUFFER_BYTES;
prebuffer_bytes = PREBUFFER_BYTES_8KHZ;
break;
}
@ -268,12 +266,14 @@ static void sco_demo_init_CVSD(void){
btstack_cvsd_plc_init(&cvsd_plc_state);
audio_input_prebuffer_bytes = PREBUFFER_BYTES_8KHZ;
#ifdef SCO_WAV_FILENAME
num_samples_to_write = CVSD_SAMPLE_RATE * SCO_WAV_DURATION_IN_SECONDS;
wav_writer_open(SCO_WAV_FILENAME, 1, CVSD_SAMPLE_RATE);
num_samples_to_write = SAMPLE_RATE_8KHZ * SCO_WAV_DURATION_IN_SECONDS;
wav_writer_open(SCO_WAV_FILENAME, 1, SAMPLE_RATE_8KHZ);
#endif
audio_initialize(CVSD_SAMPLE_RATE);
audio_initialize(SAMPLE_RATE_8KHZ);
}
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
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
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);
hfp_msbc_init();
audio_input_prebuffer_bytes = PREBUFFER_BYTES_16KHZ;
#ifdef SCO_WAV_FILENAME
num_samples_to_write = MSBC_SAMPLE_RATE * SCO_WAV_DURATION_IN_SECONDS;
wav_writer_open(SCO_WAV_FILENAME, 1, MSBC_SAMPLE_RATE);
num_samples_to_write = SAMPLE_RATE_16KHZ * SCO_WAV_DURATION_IN_SECONDS;
wav_writer_open(SCO_WAV_FILENAME, 1, SAMPLE_RATE_16KHZ);
#endif
audio_initialize(MSBC_SAMPLE_RATE);
audio_initialize(SAMPLE_RATE_16KHZ);
}
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
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
audio_input_paused = 0;
}