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monitor: parse Google's Opus A2DP vendor codec capabilities

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Support parsing Opus (Google) A2DP vendor codec capabilities.
AOSP & Google Pixel Buds Pro has this implemented.

> ACL Data RX: Handle 256 flags 0x02 dlen 21       #419 [hci0] 26.905032
      Channel: 65 len 17 [PSM 25 mode Basic (0x00)] {chan 4}
      AVDTP: Get All Capabilities (0x0c) Response Accept (0x02) type 0x00 label 3 nosp 0
        Service Category: Media Transport (0x01)
        Service Category: Media Codec (0x07)
          Media Type: Audio (0x00)
          Media Codec: Non-A2DP (0xff)
            Vendor ID: Google (0x000000e0)
            Vendor Specific Codec ID: Opus (Google) (0x0001)
              Frequency: 0x80
                48000
              Frame Duration: 0x18
                10 ms
                20 ms
              Channel Mode: 0x07
                Mono
                Stereo
                Dual Mono
              Reserved: 0x60
        Service Category: Delay Reporting (0x08)
This commit is contained in:
Pauli Virtanen 2024-02-05 19:03:16 +02:00 committed by Luiz Augusto von Dentz
parent d5c1c0e80f
commit c3613b8a93
1 changed files with 48 additions and 0 deletions
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48
monitor/a2dp.c
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@ -47,6 +47,8 @@
#define APTX_HD_CODEC_ID 0x0024
#define LDAC_VENDOR_ID 0x0000012d
#define LDAC_CODEC_ID 0x00aa
#define OPUS_G_VENDOR_ID 0x000000e0
#define OPUS_G_CODEC_ID 0x0001
struct bit_desc {
uint8_t bit_num;
@ -201,6 +203,24 @@ static const struct bit_desc faststream_source_frequency_table[] = {
{ }
};
static const struct bit_desc opus_g_frequency_table[] = {
{ 7, "48000" },
{ }
};
static const struct bit_desc opus_g_duration_table[] = {
{ 3, "10 ms" },
{ 4, "20 ms" },
{ }
};
static const struct bit_desc opus_g_channels_table[] = {
{ 0, "Mono" },
{ 1, "Stereo" },
{ 2, "Dual Mono" },
{ }
};
static void print_value_bits(uint8_t indent, uint32_t value,
const struct bit_desc *table)
{
@ -244,6 +264,7 @@ static bool codec_vendor_aptx_ll_cfg(uint8_t losc, struct l2cap_frame *frame);
static bool codec_vendor_aptx_hd_cap(uint8_t losc, struct l2cap_frame *frame);
static bool codec_vendor_aptx_hd_cfg(uint8_t losc, struct l2cap_frame *frame);
static bool codec_vendor_ldac(uint8_t losc, struct l2cap_frame *frame);
static bool codec_vendor_opus_g(uint8_t losc, struct l2cap_frame *frame);
static const struct vndcodec vndcodecs[] = {
{ APTX_VENDOR_ID, APTX_CODEC_ID, "aptX",
@ -256,6 +277,8 @@ static const struct vndcodec vndcodecs[] = {
codec_vendor_aptx_hd_cap, codec_vendor_aptx_hd_cfg },
{ LDAC_VENDOR_ID, LDAC_CODEC_ID, "LDAC",
codec_vendor_ldac, codec_vendor_ldac },
{ OPUS_G_VENDOR_ID, OPUS_G_CODEC_ID, "Opus (Google)",
codec_vendor_opus_g, codec_vendor_opus_g },
{ }
};
@ -685,6 +708,31 @@ static bool codec_vendor_ldac(uint8_t losc, struct l2cap_frame *frame)
return true;
}
static bool codec_vendor_opus_g(uint8_t losc, struct l2cap_frame *frame)
{
uint8_t cap = 0;
if (losc != 1)
return false;
l2cap_frame_get_u8(frame, &cap);
print_field("%*cFrequency: 0x%02x", BASE_INDENT + 2, ' ', cap & 0x80);
print_value_bits(BASE_INDENT + 2, cap, opus_g_frequency_table);
print_field("%*cFrame Duration: 0x%02x", BASE_INDENT + 2, ' ',
cap & 0x18);
print_value_bits(BASE_INDENT + 2, cap, opus_g_duration_table);
print_field("%*cChannel Mode: 0x%02x", BASE_INDENT + 2, ' ',
cap & 0x07);
print_value_bits(BASE_INDENT + 2, cap, opus_g_channels_table);
print_field("%*cReserved: 0x%02x", BASE_INDENT + 2, ' ', cap & 0x60);
return true;
}
static bool codec_vendor_cap(uint8_t losc, struct l2cap_frame *frame)
{
uint32_t vendor_id = 0;