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Merge branch 'bugfix/a2dp_aac_br_v6.1' into 'release/v6.1'

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fix(bt): Fix some bugs of A2DP AAC (v6.1)

See merge request espressif/esp-idf!52186
This commit is contained in:
Wang Meng Yang
2026-09-02 17:45:20 +08:00
parent 1c03ef78f3 cafa07904e
commit c2cde7c8f6
9 changed files with 420 additions and 44 deletions
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25
examples/bluetooth/bluedroid/classic_bt/a2dp_sink_stream_aac/README.md
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@@ -57,6 +57,31 @@ idf.py menuconfig
* Choose external I2S codec or internal DAC for audio output, and configure the output PINs under A2DP Sink Internal Codec Example Configuration.
### Stream Endpoint (SEP) registration
This example registers codec capabilities with `esp_a2d_sink_register_stream_endpoint()` after A2DP sink init and before connecting. A2DP requires **at least one SBC SEP**; using AAC therefore needs `ESP_A2D_MAX_SEPS >= 2`. Capabilities that do not meet A2DP Profile (SNK) fail with `ESP_A2D_SEP_REG_UNSUPPORTED` in `ESP_A2D_SEP_REG_STATE_EVT`. Overwriting the last SBC SEP fails with `ESP_A2D_SEP_REG_SBC_REQUIRED`.
**SBC (SNK)**
| Field | Mandatory |
| :---- | :-------- |
| Sampling frequency | 44.1 kHz and 48 kHz |
| Channel mode | Mono, Dual Channel, Stereo, and Joint Stereo |
| Block length | 4, 8, 12, and 16 |
| Subbands | 4 and 8 |
| Allocation method | SNR and Loudness |
| Bitpool | min = 2; max ≥ 53 (High Quality Joint Stereo 44.1 kHz, A2DP Table 4.7); max ≤ 250 |
**AAC (SNK)**
| Field | Mandatory |
| :---- | :-------- |
| Object type | MPEG-2 AAC LC |
| MPEG-D DRC | Must be 0 if only MPEG-2 AAC LC is advertised |
| Sampling frequency | 44.1 kHz and 48 kHz |
| Channels | 1 and 2 |
| VBR | Supported |
### Build and Flash
Build the project and flash it to the board, then run monitor tool to view serial output.

25
examples/bluetooth/bluedroid/classic_bt/a2dp_source_aac/README.md
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@@ -28,6 +28,31 @@ idf.py menuconfig
* Enable Classic Bluetooth and A2DP under Component config --> Bluetooth --> Bluedroid Enable
### Stream Endpoint (SEP) registration
This example registers codec capabilities with `esp_a2d_source_register_stream_endpoint()` after A2DP source init and before connecting. A2DP requires **at least one SBC SEP**; using AAC therefore needs `ESP_A2D_MAX_SEPS >= 2`. Capabilities that do not meet A2DP Profile (SRC) fail with `ESP_A2D_SEP_REG_UNSUPPORTED` in `ESP_A2D_SEP_REG_STATE_EVT`. Overwriting the last SBC SEP fails with `ESP_A2D_SEP_REG_SBC_REQUIRED`.
**SBC (SRC)**
| Field | Mandatory |
| :---- | :-------- |
| Sampling frequency | At least one of 44.1 kHz and 48 kHz |
| Channel mode | Mono, and at least one of Dual Channel / Stereo / Joint Stereo |
| Block length | 4, 8, 12, and 16 |
| Subbands | 8 |
| Allocation method | Loudness |
| Bitpool | min 2–250, max 2–250, min ≤ max |
**AAC (SRC)**
| Field | Mandatory |
| :---- | :-------- |
| Object type | MPEG-2 AAC LC |
| MPEG-D DRC | Must be 0 if only MPEG-2 AAC LC is advertised |
| Sampling frequency | At least one of 44.1 kHz and 48 kHz |
| Channels | At least one of 1 and 2 |
| VBR | Optional |
### Build and Flash
Build the project and flash it to the board, then run monitor tool to view serial output.