| /* |
| * Copyright (C) 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. |
| */ |
| |
| // |
| // A2DP constants for AAC codec |
| // |
| |
| #ifndef A2DP_AAC_CONSTANTS_H |
| #define A2DP_AAC_CONSTANTS_H |
| |
| // AAC codec specific settings |
| #define A2DP_AAC_CODEC_LEN 8 |
| |
| // [Octet 0] Object Type |
| #define A2DP_AAC_OBJECT_TYPE_MPEG2_LC 0x80 /* MPEG-2 Low Complexity */ |
| #define A2DP_AAC_OBJECT_TYPE_MPEG4_LC 0x40 /* MPEG-4 Low Complexity */ |
| #define A2DP_AAC_OBJECT_TYPE_MPEG4_LTP 0x20 /* MPEG-4 Long Term Prediction */ |
| #define A2DP_AAC_OBJECT_TYPE_MPEG4_SCALABLE 0x10 |
| // [Octet 1] Sampling Frequency - 8000 to 44100 |
| #define A2DP_AAC_SAMPLING_FREQ_MASK0 0xFF |
| #define A2DP_AAC_SAMPLING_FREQ_8000 0x80 |
| #define A2DP_AAC_SAMPLING_FREQ_11025 0x40 |
| #define A2DP_AAC_SAMPLING_FREQ_12000 0x20 |
| #define A2DP_AAC_SAMPLING_FREQ_16000 0x10 |
| #define A2DP_AAC_SAMPLING_FREQ_22050 0x08 |
| #define A2DP_AAC_SAMPLING_FREQ_24000 0x04 |
| #define A2DP_AAC_SAMPLING_FREQ_32000 0x02 |
| #define A2DP_AAC_SAMPLING_FREQ_44100 0x01 |
| // [Octet 2], [Bits 4-7] Sampling Frequency - 48000 to 96000 |
| // NOTE: Bits offset for the higher-order octet 16-bit integer |
| #define A2DP_AAC_SAMPLING_FREQ_MASK1 (0xF0 << 8) |
| #define A2DP_AAC_SAMPLING_FREQ_48000 (0x80 << 8) |
| #define A2DP_AAC_SAMPLING_FREQ_64000 (0x40 << 8) |
| #define A2DP_AAC_SAMPLING_FREQ_88200 (0x20 << 8) |
| #define A2DP_AAC_SAMPLING_FREQ_96000 (0x10 << 8) |
| // [Octet 2], [Bits 2-3] Channel Mode |
| #define A2DP_AAC_CHANNEL_MODE_MASK 0x0C |
| #define A2DP_AAC_CHANNEL_MODE_MONO 0x08 |
| #define A2DP_AAC_CHANNEL_MODE_STEREO 0x04 |
| // [Octet 2], [Bits 0-1] RFA |
| // [Octet 3], [Bit 7] Variable Bit Rate Supported |
| #define A2DP_AAC_VARIABLE_BIT_RATE_MASK 0x80 |
| #define A2DP_AAC_VARIABLE_BIT_RATE_ENABLED 0x80 |
| #define A2DP_AAC_VARIABLE_BIT_RATE_DISABLED 0x00 |
| // [Octet 3], [Bits 0-6] Bit Rate - Bits 16-22 in the 23-bit UiMsbf |
| #define A2DP_AAC_BIT_RATE_MASK0 (0x7F << 16) |
| #define A2DP_AAC_BIT_RATE_MASK1 (0xFF << 8) |
| #define A2DP_AAC_BIT_RATE_MASK2 0xFF |
| // [Octet 4], [Bits 0-7] Bit Rate - Bits 8-15 in the 23-bit UiMsfb |
| // [Octet 5], [Bits 0-7] Bit Rate - Bits 0-7 in the 23-bit UiMsfb |
| |
| #endif // A2DP_AAC_CONSTANTS_H |
