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/*
* Copyright 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
//
// Interface to the A2DP AAC Encoder
//
#ifndef A2DP_AAC_ENCODER_H
#define A2DP_AAC_ENCODER_H
#include "a2dp_aac_constants.h"
#include "a2dp_codec_api.h"
// Is used in btav_a2dp_codec_config_t.codec_specific_1 when codec is AAC
enum class AacEncoderBitrateMode : int64_t {
// Variable bitrate mode unsupported when used in a codec report, and upper
// layer can use this value as system default (keep current settings)
AACENC_BR_MODE_CBR = A2DP_AAC_VARIABLE_BIT_RATE_DISABLED,
// Constant bitrate mode when Variable bitrate mode is supported. This can
// also be used to disable Variable bitrate mode by upper layer
AACENC_BR_MODE_VBR_C = (A2DP_AAC_VARIABLE_BIT_RATE_ENABLED | 0x00),
// Variable bitrate mode (very low bitrate for software encoding).
AACENC_BR_MODE_VBR_1 = (A2DP_AAC_VARIABLE_BIT_RATE_ENABLED | 0x01),
// Variable bitrate mode (low bitrate for software encoding).
AACENC_BR_MODE_VBR_2 = (A2DP_AAC_VARIABLE_BIT_RATE_ENABLED | 0x02),
// Variable bitrate mode (medium bitrate for software encoding).
AACENC_BR_MODE_VBR_3 = (A2DP_AAC_VARIABLE_BIT_RATE_ENABLED | 0x03),
// Variable bitrate mode (high bitrate for software encoding).
AACENC_BR_MODE_VBR_4 = (A2DP_AAC_VARIABLE_BIT_RATE_ENABLED | 0x04),
// Variable bitrate mode (very high bitrate for software encoding).
AACENC_BR_MODE_VBR_5 = (A2DP_AAC_VARIABLE_BIT_RATE_ENABLED | 0x05),
};
// Loads the A2DP AAC encoder.
// Return true on success, otherwise false.
bool A2DP_LoadEncoderAac(void);
// Unloads the A2DP AAC encoder.
void A2DP_UnloadEncoderAac(void);
// Initialize the A2DP AAC encoder.
// |p_peer_params| contains the A2DP peer information
// The current A2DP codec config is in |a2dp_codec_config|.
// |read_callback| is the callback for reading the input audio data.
// |enqueue_callback| is the callback for enqueueing the encoded audio data.
void a2dp_aac_encoder_init(const tA2DP_ENCODER_INIT_PEER_PARAMS* p_peer_params,
A2dpCodecConfig* a2dp_codec_config,
a2dp_source_read_callback_t read_callback,
a2dp_source_enqueue_callback_t enqueue_callback);
// Cleanup the A2DP AAC encoder.
void a2dp_aac_encoder_cleanup(void);
// Reset the feeding for the A2DP AAC encoder.
void a2dp_aac_feeding_reset(void);
// Flush the feeding for the A2DP AAC encoder.
void a2dp_aac_feeding_flush(void);
// Get the A2DP AAC encoder interval (in milliseconds).
uint64_t a2dp_aac_get_encoder_interval_ms(void);
// Prepare and send A2DP AAC encoded frames.
// |timestamp_us| is the current timestamp (in microseconds).
void a2dp_aac_send_frames(uint64_t timestamp_us);
#endif // A2DP_AAC_ENCODER_H
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