mirror/btstack
1
0
Fork 0
mirror of https://github.com/bluekitchen/btstack.git synced 2025-01-26 12:35:25 +00:00
Code Issues Packages Projects Releases Wiki Activity

sco_util: flip big endian samples from microphone for outgoing CVSD SCO packets

Browse Source
This commit is contained in:
Matthias Ringwald 2017-01-26 22:21:12 +01:00
parent 5303ddeefc
commit 8fd6902d67
1 changed files with 13 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
example/sco_demo_util.c
View File

@ -631,16 +631,27 @@ void sco_demo_send(hci_con_handle_t sco_handle){
// get data from ringbuffer
uint16_t pos = 0;
uint8_t * sample_data = &sco_packet[3];
if (!pa_input_paused){
uint32_t bytes_read = 0;
btstack_ring_buffer_read(&pa_input_ring_buffer, sco_packet + 3, bytes_to_copy, &bytes_read);
btstack_ring_buffer_read(&pa_input_ring_buffer, sample_data, bytes_to_copy, &bytes_read);
// flip 16 on big endian systems
// @note We don't use (uint16_t *) casts since all sample addresses are odd which causes crahses on some systems
if (btstack_is_big_endian()){
int i;
for (i=0;i<bytes_read;i+=2){
uint8_t tmp = sample_data[i*2];
sample_data[i*2] = sample_data[i*2+1];
sample_data[i*2+1] = tmp;
}
}
bytes_to_copy -= bytes_read;
pos += bytes_read;
}
// fill with 0 if not enough
if (bytes_to_copy){
memset(sco_packet + 3 + pos, 0, bytes_to_copy);
memset(sample_data + pos, 0, bytes_to_copy);
pa_input_paused = 1;
}
}