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bluez5: fix CVSD recording on Intel AX200

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Intel 8087:0029 at Firmware revision 0.0 build 191 week 21 2021 on
kernel 5.13.19 produces CVSD data stream that consists of 96-byte data
packets interleaved with 96-byte zero packets.

This seems to not occur on other adapters, which usually produce only
48-byte data packets.
This commit is contained in:
Pauli Virtanen 2021-09-26 13:03:25 +03:00
parent 9e94aafaec
commit dc7b88e1da
1 changed files with 24 additions and 24 deletions
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48
spa/plugins/bluez5/sco-source.c
View file

@ -382,26 +382,22 @@ static void msbc_buffer_append_byte(struct impl *this, uint8_t byte)
++this->msbc_buffer_pos;
}
/*
Helper function for easier debugging
Caveat: If size_read is not a multiple of 16, then the last bytes
will not be printed / logged
*/
static void hexdump_to_log(void *log, uint8_t *read_data, int size_read)
/* Helper function for debugging */
static SPA_UNUSED void hexdump_to_log(struct spa_log *log, uint8_t *data, size_t size)
{
int rowsize = 16*3;
int line_idx = 0;
char hexline[16*3] = "";
int i;
for (i = 0; i < size_read; ++i) {
snprintf(&hexline[line_idx], 4, "%02X ", read_data[i]);
line_idx += 3;
if (line_idx == rowsize) {
spa_log_trace(log, "Processing read data: read_data %02i: %s", i-15, hexline);
line_idx = 0;
}
char buf[2048];
size_t i, col = 0, pos = 0;
buf[0] = '\0';
for (i = 0; i < size; ++i) {
int res;
res = spa_scnprintf(buf + pos, sizeof(buf) - pos, "%s%02x",
(col == 0) ? "\n\t" : " ", data[i]);
if (res < 0)
break;
pos += res;
col = (col + 1) % 16;
}
spa_log_trace(log, "hexdump (%d bytes):%s", (int)size, buf);
}
/* helper function to detect if a packet consists only of zeros */
@ -423,12 +419,6 @@ static void preprocess_and_decode_msbc_data(void *userdata, uint8_t *read_data,
spa_log_trace(this->log, "handling mSBC data");
/* print hexdump of package */
bool flag_hexdump_to_log = false;
if (flag_hexdump_to_log) {
hexdump_to_log(this->log, read_data, size_read);
}
/* check if the packet contains only zeros - if so ignore the packet.
This is necessary, because some kernels insert bogus "all-zero" packets
into the datastream.
@ -522,12 +512,22 @@ static int sco_source_cb(void *userdata, uint8_t *read_data, int size_read)
/* handle data read from socket */
spa_log_trace(this->log, "read socket data %d", size_read);
#if 0
hexdump_to_log(this->log, read_data, size_read);
#endif
if (this->transport->codec == HFP_AUDIO_CODEC_MSBC) {
preprocess_and_decode_msbc_data(userdata, read_data, size_read);
} else {
uint8_t *packet;
if (size_read != 48 && is_zero_packet(read_data, size_read)) {
/* Adapter is returning non-standard CVSD stream. For example
* Intel 8087:0029 at Firmware revision 0.0 build 191 week 21 2021
* on kernel 5.13.19 produces such data.
*/
return 0;
}
packet = (uint8_t *)datas[0].data + port->ready_offset;
spa_memmove(packet, read_data, size_read);
port->ready_offset += size_read;