| /* |
| * 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 |