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553 lines
19 KiB
553 lines
19 KiB
/*
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* Copyright 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "a2dp_encoding"
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#include "a2dp_encoding.h"
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#include "client_interface.h"
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#include "codec_status.h"
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#include "a2dp_sbc_constants.h"
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#include "btif_a2dp_source.h"
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#include "btif_av.h"
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#include "btif_av_co.h"
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#include "btif_hf.h"
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#include "osi/include/log.h"
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#include "osi/include/properties.h"
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namespace {
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using ::bluetooth::audio::AudioCapabilities;
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using ::bluetooth::audio::AudioConfiguration;
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using ::bluetooth::audio::BitsPerSample;
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using ::bluetooth::audio::BluetoothAudioCtrlAck;
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using ::bluetooth::audio::ChannelMode;
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using ::bluetooth::audio::PcmParameters;
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using ::bluetooth::audio::SampleRate;
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using ::bluetooth::audio::SessionType;
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using ::bluetooth::audio::BluetoothAudioSinkClientInterface;
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using ::bluetooth::audio::codec::A2dpAacToHalConfig;
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using ::bluetooth::audio::codec::A2dpAptxToHalConfig;
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using ::bluetooth::audio::codec::A2dpCodecToHalBitsPerSample;
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using ::bluetooth::audio::codec::A2dpCodecToHalChannelMode;
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using ::bluetooth::audio::codec::A2dpCodecToHalSampleRate;
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using ::bluetooth::audio::codec::A2dpLdacToHalConfig;
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using ::bluetooth::audio::codec::A2dpSbcToHalConfig;
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using ::bluetooth::audio::codec::CodecConfiguration;
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BluetoothAudioCtrlAck a2dp_ack_to_bt_audio_ctrl_ack(tA2DP_CTRL_ACK ack);
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// Provide call-in APIs for the Bluetooth Audio HAL
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class A2dpTransport
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: public ::bluetooth::audio::IBluetoothSinkTransportInstance {
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public:
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A2dpTransport(SessionType sessionType)
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: IBluetoothSinkTransportInstance(sessionType, {}),
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total_bytes_read_(0),
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data_position_({}) {
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a2dp_pending_cmd_ = A2DP_CTRL_CMD_NONE;
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remote_delay_report_ = 0;
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}
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BluetoothAudioCtrlAck StartRequest() override {
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// Check if a previous request is not finished
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if (a2dp_pending_cmd_ == A2DP_CTRL_CMD_START) {
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LOG(INFO) << __func__ << ": A2DP_CTRL_CMD_START in progress";
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return a2dp_ack_to_bt_audio_ctrl_ack(A2DP_CTRL_ACK_PENDING);
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} else if (a2dp_pending_cmd_ != A2DP_CTRL_CMD_NONE) {
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LOG(WARNING) << __func__ << ": busy in pending_cmd=" << a2dp_pending_cmd_;
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return a2dp_ack_to_bt_audio_ctrl_ack(A2DP_CTRL_ACK_FAILURE);
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}
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// Don't send START request to stack while we are in a call
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if (!bluetooth::headset::IsCallIdle()) {
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LOG(ERROR) << __func__ << ": call state is busy";
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return a2dp_ack_to_bt_audio_ctrl_ack(A2DP_CTRL_ACK_INCALL_FAILURE);
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}
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if (btif_av_stream_started_ready()) {
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// Already started, ACK back immediately.
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return a2dp_ack_to_bt_audio_ctrl_ack(A2DP_CTRL_ACK_SUCCESS);
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}
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if (btif_av_stream_ready()) {
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/*
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* Post start event and wait for audio path to open.
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* If we are the source, the ACK will be sent after the start
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* procedure is completed, othewise send it now.
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*/
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a2dp_pending_cmd_ = A2DP_CTRL_CMD_START;
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btif_av_stream_start();
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if (btif_av_get_peer_sep() != AVDT_TSEP_SRC) {
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LOG(INFO) << __func__ << ": accepted";
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return a2dp_ack_to_bt_audio_ctrl_ack(A2DP_CTRL_ACK_PENDING);
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}
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a2dp_pending_cmd_ = A2DP_CTRL_CMD_NONE;
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return a2dp_ack_to_bt_audio_ctrl_ack(A2DP_CTRL_ACK_SUCCESS);
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}
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LOG(ERROR) << __func__ << ": AV stream is not ready to start";
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return a2dp_ack_to_bt_audio_ctrl_ack(A2DP_CTRL_ACK_FAILURE);
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}
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BluetoothAudioCtrlAck SuspendRequest() override {
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// Previous request is not finished
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if (a2dp_pending_cmd_ == A2DP_CTRL_CMD_SUSPEND) {
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LOG(INFO) << __func__ << ": A2DP_CTRL_CMD_SUSPEND in progress";
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return a2dp_ack_to_bt_audio_ctrl_ack(A2DP_CTRL_ACK_PENDING);
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} else if (a2dp_pending_cmd_ != A2DP_CTRL_CMD_NONE) {
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LOG(WARNING) << __func__ << ": busy in pending_cmd=" << a2dp_pending_cmd_;
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return a2dp_ack_to_bt_audio_ctrl_ack(A2DP_CTRL_ACK_FAILURE);
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}
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// Local suspend
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if (btif_av_stream_started_ready()) {
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LOG(INFO) << __func__ << ": accepted";
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a2dp_pending_cmd_ = A2DP_CTRL_CMD_SUSPEND;
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btif_av_stream_suspend();
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return BluetoothAudioCtrlAck::PENDING;
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}
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/* If we are not in started state, just ack back ok and let
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* audioflinger close the channel. This can happen if we are
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* remotely suspended, clear REMOTE SUSPEND flag.
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*/
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btif_av_clear_remote_suspend_flag();
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return a2dp_ack_to_bt_audio_ctrl_ack(A2DP_CTRL_ACK_SUCCESS);
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}
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void StopRequest() override {
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if (btif_av_get_peer_sep() == AVDT_TSEP_SNK &&
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!btif_av_stream_started_ready()) {
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btif_av_clear_remote_suspend_flag();
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return;
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}
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LOG(INFO) << __func__ << ": handling";
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a2dp_pending_cmd_ = A2DP_CTRL_CMD_STOP;
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btif_av_stream_stop(RawAddress::kEmpty);
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}
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bool GetPresentationPosition(uint64_t* remote_delay_report_ns,
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uint64_t* total_bytes_read,
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timespec* data_position) override {
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*remote_delay_report_ns = remote_delay_report_ * 100000u;
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*total_bytes_read = total_bytes_read_;
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*data_position = data_position_;
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VLOG(2) << __func__ << ": delay=" << remote_delay_report_
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<< "/10ms, data=" << total_bytes_read_
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<< " byte(s), timestamp=" << data_position_.tv_sec << "."
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<< data_position_.tv_nsec << "s";
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return true;
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}
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void MetadataChanged(const source_metadata_t& source_metadata) override {
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auto track_count = source_metadata.track_count;
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auto tracks = source_metadata.tracks;
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VLOG(1) << __func__ << ": " << track_count << " track(s) received";
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while (track_count) {
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VLOG(2) << __func__ << ": usage=" << tracks->usage
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<< ", content_type=" << tracks->content_type
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<< ", gain=" << tracks->gain;
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--track_count;
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++tracks;
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}
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}
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tA2DP_CTRL_CMD GetPendingCmd() const { return a2dp_pending_cmd_; }
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void ResetPendingCmd() { a2dp_pending_cmd_ = A2DP_CTRL_CMD_NONE; }
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void ResetPresentationPosition() override {
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remote_delay_report_ = 0;
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total_bytes_read_ = 0;
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data_position_ = {};
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}
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void LogBytesRead(size_t bytes_read) override {
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if (bytes_read != 0) {
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total_bytes_read_ += bytes_read;
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clock_gettime(CLOCK_MONOTONIC, &data_position_);
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}
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}
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// delay reports from AVDTP is based on 1/10 ms (100us)
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void SetRemoteDelay(uint16_t delay_report) {
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remote_delay_report_ = delay_report;
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}
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private:
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static tA2DP_CTRL_CMD a2dp_pending_cmd_;
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static uint16_t remote_delay_report_;
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uint64_t total_bytes_read_;
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timespec data_position_;
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};
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tA2DP_CTRL_CMD A2dpTransport::a2dp_pending_cmd_ = A2DP_CTRL_CMD_NONE;
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uint16_t A2dpTransport::remote_delay_report_ = 0;
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// Common interface to call-out into Bluetooth Audio HAL
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BluetoothAudioSinkClientInterface* software_hal_interface = nullptr;
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BluetoothAudioSinkClientInterface* offloading_hal_interface = nullptr;
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BluetoothAudioSinkClientInterface* active_hal_interface = nullptr;
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// Save the value if the remote reports its delay before this interface is
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// initialized
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uint16_t remote_delay = 0;
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bool btaudio_a2dp_disabled = false;
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bool is_configured = false;
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BluetoothAudioCtrlAck a2dp_ack_to_bt_audio_ctrl_ack(tA2DP_CTRL_ACK ack) {
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switch (ack) {
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case A2DP_CTRL_ACK_SUCCESS:
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return BluetoothAudioCtrlAck::SUCCESS_FINISHED;
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case A2DP_CTRL_ACK_PENDING:
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return BluetoothAudioCtrlAck::PENDING;
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case A2DP_CTRL_ACK_INCALL_FAILURE:
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return BluetoothAudioCtrlAck::FAILURE_BUSY;
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case A2DP_CTRL_ACK_DISCONNECT_IN_PROGRESS:
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return BluetoothAudioCtrlAck::FAILURE_DISCONNECTING;
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case A2DP_CTRL_ACK_UNSUPPORTED: /* Offloading but resource failure */
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return BluetoothAudioCtrlAck::FAILURE_UNSUPPORTED;
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case A2DP_CTRL_ACK_FAILURE:
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return BluetoothAudioCtrlAck::FAILURE;
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default:
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return BluetoothAudioCtrlAck::FAILURE;
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}
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}
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bool a2dp_get_selected_hal_codec_config(CodecConfiguration* codec_config) {
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A2dpCodecConfig* a2dp_config = bta_av_get_a2dp_current_codec();
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if (a2dp_config == nullptr) {
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LOG(WARNING) << __func__ << ": failure to get A2DP codec config";
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*codec_config = ::bluetooth::audio::codec::kInvalidCodecConfiguration;
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return false;
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}
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btav_a2dp_codec_config_t current_codec = a2dp_config->getCodecConfig();
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switch (current_codec.codec_type) {
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case BTAV_A2DP_CODEC_INDEX_SOURCE_SBC:
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[[fallthrough]];
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case BTAV_A2DP_CODEC_INDEX_SINK_SBC: {
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if (!A2dpSbcToHalConfig(codec_config, a2dp_config)) {
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return false;
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}
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break;
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}
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case BTAV_A2DP_CODEC_INDEX_SOURCE_AAC:
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[[fallthrough]];
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case BTAV_A2DP_CODEC_INDEX_SINK_AAC: {
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if (!A2dpAacToHalConfig(codec_config, a2dp_config)) {
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return false;
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}
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break;
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}
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case BTAV_A2DP_CODEC_INDEX_SOURCE_APTX:
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[[fallthrough]];
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case BTAV_A2DP_CODEC_INDEX_SOURCE_APTX_HD: {
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if (!A2dpAptxToHalConfig(codec_config, a2dp_config)) {
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return false;
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}
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break;
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}
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case BTAV_A2DP_CODEC_INDEX_SOURCE_LDAC: {
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if (!A2dpLdacToHalConfig(codec_config, a2dp_config)) {
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return false;
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}
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break;
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}
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case BTAV_A2DP_CODEC_INDEX_MAX:
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[[fallthrough]];
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default:
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LOG(ERROR) << __func__
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<< ": Unknown codec_type=" << current_codec.codec_type;
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*codec_config = ::bluetooth::audio::codec::kInvalidCodecConfiguration;
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return false;
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}
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codec_config->encodedAudioBitrate = a2dp_config->getTrackBitRate();
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// Obtain the MTU
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RawAddress peer_addr = btif_av_source_active_peer();
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tA2DP_ENCODER_INIT_PEER_PARAMS peer_param;
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bta_av_co_get_peer_params(peer_addr, &peer_param);
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int effectiveMtu = a2dp_config->getEffectiveMtu();
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if (effectiveMtu > 0 && effectiveMtu < peer_param.peer_mtu) {
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codec_config->peerMtu = effectiveMtu;
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} else {
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codec_config->peerMtu = peer_param.peer_mtu;
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}
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if (current_codec.codec_type == BTAV_A2DP_CODEC_INDEX_SOURCE_SBC &&
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codec_config->config.sbcConfig().maxBitpool <=
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A2DP_SBC_BITPOOL_MIDDLE_QUALITY) {
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codec_config->peerMtu = MAX_2MBPS_AVDTP_MTU;
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} else if (codec_config->peerMtu > MAX_3MBPS_AVDTP_MTU) {
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codec_config->peerMtu = MAX_3MBPS_AVDTP_MTU;
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}
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LOG(INFO) << __func__ << ": CodecConfiguration=" << toString(*codec_config);
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return true;
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}
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bool a2dp_get_selected_hal_pcm_config(PcmParameters* pcm_config) {
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if (pcm_config == nullptr) return false;
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A2dpCodecConfig* a2dp_codec_configs = bta_av_get_a2dp_current_codec();
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if (a2dp_codec_configs == nullptr) {
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LOG(WARNING) << __func__ << ": failure to get A2DP codec config";
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*pcm_config = BluetoothAudioSinkClientInterface::kInvalidPcmConfiguration;
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return false;
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}
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btav_a2dp_codec_config_t current_codec = a2dp_codec_configs->getCodecConfig();
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pcm_config->sampleRate = A2dpCodecToHalSampleRate(current_codec);
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pcm_config->bitsPerSample = A2dpCodecToHalBitsPerSample(current_codec);
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pcm_config->channelMode = A2dpCodecToHalChannelMode(current_codec);
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return (pcm_config->sampleRate != SampleRate::RATE_UNKNOWN &&
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pcm_config->bitsPerSample != BitsPerSample::BITS_UNKNOWN &&
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pcm_config->channelMode != ChannelMode::UNKNOWN);
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}
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// Checking if new bluetooth_audio is supported
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bool is_hal_2_0_force_disabled() {
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if (!is_configured) {
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btaudio_a2dp_disabled = osi_property_get_bool(BLUETOOTH_AUDIO_HAL_PROP_DISABLED, false);
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is_configured = true;
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}
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return btaudio_a2dp_disabled;
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}
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} // namespace
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namespace bluetooth {
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namespace audio {
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namespace a2dp {
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bool update_codec_offloading_capabilities(
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const std::vector<btav_a2dp_codec_config_t>& framework_preference) {
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return ::bluetooth::audio::codec::UpdateOffloadingCapabilities(
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framework_preference);
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}
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// Checking if new bluetooth_audio is enabled
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bool is_hal_2_0_enabled() { return active_hal_interface != nullptr; }
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// Check if new bluetooth_audio is running with offloading encoders
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bool is_hal_2_0_offloading() {
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if (!is_hal_2_0_enabled()) {
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return false;
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}
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return active_hal_interface->GetTransportInstance()->GetSessionType() ==
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SessionType::A2DP_HARDWARE_OFFLOAD_DATAPATH;
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}
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// Initialize BluetoothAudio HAL: openProvider
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bool init(bluetooth::common::MessageLoopThread* message_loop) {
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LOG(INFO) << __func__;
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if (is_hal_2_0_force_disabled()) {
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LOG(ERROR) << __func__ << ": BluetoothAudio HAL is disabled";
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return false;
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}
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auto a2dp_sink =
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new A2dpTransport(SessionType::A2DP_SOFTWARE_ENCODING_DATAPATH);
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software_hal_interface =
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new BluetoothAudioSinkClientInterface(a2dp_sink, message_loop);
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if (!software_hal_interface->IsValid()) {
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LOG(WARNING) << __func__ << ": BluetoothAudio HAL for A2DP is invalid?!";
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delete software_hal_interface;
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software_hal_interface = nullptr;
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delete a2dp_sink;
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return false;
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}
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if (btif_av_is_a2dp_offload_enabled()) {
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a2dp_sink = new A2dpTransport(SessionType::A2DP_HARDWARE_OFFLOAD_DATAPATH);
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offloading_hal_interface =
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new BluetoothAudioSinkClientInterface(a2dp_sink, message_loop);
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if (!offloading_hal_interface->IsValid()) {
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LOG(FATAL) << __func__
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<< ": BluetoothAudio HAL for A2DP offloading is invalid?!";
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delete offloading_hal_interface;
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offloading_hal_interface = nullptr;
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delete a2dp_sink;
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a2dp_sink = static_cast<A2dpTransport*>(
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software_hal_interface->GetTransportInstance());
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delete software_hal_interface;
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software_hal_interface = nullptr;
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delete a2dp_sink;
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return false;
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}
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}
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active_hal_interface =
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(offloading_hal_interface != nullptr ? offloading_hal_interface
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: software_hal_interface);
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if (remote_delay != 0) {
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LOG(INFO) << __func__ << ": restore DELAY "
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<< static_cast<float>(remote_delay / 10.0) << " ms";
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static_cast<A2dpTransport*>(active_hal_interface->GetTransportInstance())
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->SetRemoteDelay(remote_delay);
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remote_delay = 0;
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}
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return true;
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}
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// Clean up BluetoothAudio HAL
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void cleanup() {
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if (!is_hal_2_0_enabled()) return;
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end_session();
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auto a2dp_sink = active_hal_interface->GetTransportInstance();
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static_cast<A2dpTransport*>(a2dp_sink)->ResetPendingCmd();
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static_cast<A2dpTransport*>(a2dp_sink)->ResetPresentationPosition();
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active_hal_interface = nullptr;
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a2dp_sink = software_hal_interface->GetTransportInstance();
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delete software_hal_interface;
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software_hal_interface = nullptr;
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delete a2dp_sink;
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if (offloading_hal_interface != nullptr) {
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a2dp_sink = offloading_hal_interface->GetTransportInstance();
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delete offloading_hal_interface;
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offloading_hal_interface = nullptr;
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delete a2dp_sink;
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}
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remote_delay = 0;
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}
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// Set up the codec into BluetoothAudio HAL
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bool setup_codec() {
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if (!is_hal_2_0_enabled()) {
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LOG(ERROR) << __func__ << ": BluetoothAudio HAL is not enabled";
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return false;
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}
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CodecConfiguration codec_config{};
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if (!a2dp_get_selected_hal_codec_config(&codec_config)) {
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LOG(ERROR) << __func__ << ": Failed to get CodecConfiguration";
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return false;
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}
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bool should_codec_offloading =
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bluetooth::audio::codec::IsCodecOffloadingEnabled(codec_config);
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if (should_codec_offloading && !is_hal_2_0_offloading()) {
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LOG(WARNING) << __func__ << ": Switching BluetoothAudio HAL to Hardware";
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end_session();
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active_hal_interface = offloading_hal_interface;
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} else if (!should_codec_offloading && is_hal_2_0_offloading()) {
|
|
LOG(WARNING) << __func__ << ": Switching BluetoothAudio HAL to Software";
|
|
end_session();
|
|
active_hal_interface = software_hal_interface;
|
|
}
|
|
|
|
AudioConfiguration audio_config{};
|
|
if (active_hal_interface->GetTransportInstance()->GetSessionType() ==
|
|
SessionType::A2DP_HARDWARE_OFFLOAD_DATAPATH) {
|
|
audio_config.codecConfig(codec_config);
|
|
} else {
|
|
PcmParameters pcm_config{};
|
|
if (!a2dp_get_selected_hal_pcm_config(&pcm_config)) {
|
|
LOG(ERROR) << __func__ << ": Failed to get PcmConfiguration";
|
|
return false;
|
|
}
|
|
audio_config.pcmConfig(pcm_config);
|
|
}
|
|
return active_hal_interface->UpdateAudioConfig(audio_config);
|
|
}
|
|
|
|
void start_session() {
|
|
if (!is_hal_2_0_enabled()) {
|
|
LOG(ERROR) << __func__ << ": BluetoothAudio HAL is not enabled";
|
|
return;
|
|
}
|
|
active_hal_interface->StartSession();
|
|
}
|
|
|
|
void end_session() {
|
|
if (!is_hal_2_0_enabled()) {
|
|
LOG(ERROR) << __func__ << ": BluetoothAudio HAL is not enabled";
|
|
return;
|
|
}
|
|
active_hal_interface->EndSession();
|
|
static_cast<A2dpTransport*>(active_hal_interface->GetTransportInstance())
|
|
->ResetPendingCmd();
|
|
static_cast<A2dpTransport*>(active_hal_interface->GetTransportInstance())
|
|
->ResetPresentationPosition();
|
|
}
|
|
|
|
void ack_stream_started(const tA2DP_CTRL_ACK& ack) {
|
|
auto ctrl_ack = a2dp_ack_to_bt_audio_ctrl_ack(ack);
|
|
LOG(INFO) << __func__ << ": result=" << ctrl_ack;
|
|
auto a2dp_sink =
|
|
static_cast<A2dpTransport*>(active_hal_interface->GetTransportInstance());
|
|
auto pending_cmd = a2dp_sink->GetPendingCmd();
|
|
if (pending_cmd == A2DP_CTRL_CMD_START) {
|
|
active_hal_interface->StreamStarted(ctrl_ack);
|
|
} else {
|
|
LOG(WARNING) << __func__ << ": pending=" << pending_cmd
|
|
<< " ignore result=" << ctrl_ack;
|
|
return;
|
|
}
|
|
if (ctrl_ack != bluetooth::audio::BluetoothAudioCtrlAck::PENDING) {
|
|
a2dp_sink->ResetPendingCmd();
|
|
}
|
|
}
|
|
|
|
void ack_stream_suspended(const tA2DP_CTRL_ACK& ack) {
|
|
auto ctrl_ack = a2dp_ack_to_bt_audio_ctrl_ack(ack);
|
|
LOG(INFO) << __func__ << ": result=" << ctrl_ack;
|
|
auto a2dp_sink =
|
|
static_cast<A2dpTransport*>(active_hal_interface->GetTransportInstance());
|
|
auto pending_cmd = a2dp_sink->GetPendingCmd();
|
|
if (pending_cmd == A2DP_CTRL_CMD_SUSPEND) {
|
|
active_hal_interface->StreamSuspended(ctrl_ack);
|
|
} else if (pending_cmd == A2DP_CTRL_CMD_STOP) {
|
|
LOG(INFO) << __func__ << ": A2DP_CTRL_CMD_STOP result=" << ctrl_ack;
|
|
} else {
|
|
LOG(WARNING) << __func__ << ": pending=" << pending_cmd
|
|
<< " ignore result=" << ctrl_ack;
|
|
return;
|
|
}
|
|
if (ctrl_ack != bluetooth::audio::BluetoothAudioCtrlAck::PENDING) {
|
|
a2dp_sink->ResetPendingCmd();
|
|
}
|
|
}
|
|
|
|
// Read from the FMQ of BluetoothAudio HAL
|
|
size_t read(uint8_t* p_buf, uint32_t len) {
|
|
if (!is_hal_2_0_enabled()) {
|
|
LOG(ERROR) << __func__ << ": BluetoothAudio HAL is not enabled";
|
|
return 0;
|
|
} else if (is_hal_2_0_offloading()) {
|
|
LOG(ERROR) << __func__ << ": session_type="
|
|
<< toString(active_hal_interface->GetTransportInstance()
|
|
->GetSessionType())
|
|
<< " is not A2DP_SOFTWARE_ENCODING_DATAPATH";
|
|
return 0;
|
|
}
|
|
return active_hal_interface->ReadAudioData(p_buf, len);
|
|
}
|
|
|
|
// Update A2DP delay report to BluetoothAudio HAL
|
|
void set_remote_delay(uint16_t delay_report) {
|
|
if (!is_hal_2_0_enabled()) {
|
|
LOG(INFO) << __func__ << ": not ready for DelayReport "
|
|
<< static_cast<float>(delay_report / 10.0) << " ms";
|
|
remote_delay = delay_report;
|
|
return;
|
|
}
|
|
VLOG(1) << __func__ << ": DELAY " << static_cast<float>(delay_report / 10.0)
|
|
<< " ms";
|
|
static_cast<A2dpTransport*>(active_hal_interface->GetTransportInstance())
|
|
->SetRemoteDelay(delay_report);
|
|
}
|
|
|
|
} // namespace a2dp
|
|
} // namespace audio
|
|
} // namespace bluetooth
|