> ## Documentation Index > Fetch the complete documentation index at: https://dragonwingdocs-staging.qualcomm.com/llms.txt > Use this file to discover all available pages before exploring further. # AAC Decoder API **Header:** `spf/api/modules/aac_decoder_api.h` ## Structures ### `param_id_aac_sbr_ps_flag_t` **Members** Changes are applied to the next decoded frame} ### `param_id_aac_dual_mono_mapping_t` **Members** ### `param_id_aac_sbr_signalling_t` **Members** If this value is set as AAC\_EXTENSION\_AOT\_LC, all remaining fields are ignored and the decoder operates in implicit signaling mode.} } } ### `param_id_aac_stereo_mix_coeff_selection_t` **Members** } ## Type Definitions ### `param_id_aac_sbr_ps_flag_t` ```cpp theme={null} typedef struct param_id_aac_sbr_ps_flag_t param_id_aac_sbr_ps_flag_t ``` ### `aac_dual_mono_mapping_param_t` ```cpp theme={null} typedef struct aac_dual_mono_mapping_param_t aac_dual_mono_mapping_param_t ``` ### `param_id_aac_sbr_signalling_t` ```cpp theme={null} typedef struct param_id_aac_sbr_signalling_t param_id_aac_sbr_signalling_t ``` ### `param_id_aac_stereo_mix_coeff_selection_t` ```cpp theme={null} typedef struct param_id_aac_stereo_mix_coeff_selection_t param_id_aac_stereo_mix_coeff_selection_t ``` ## Macros ### `AAC_DEC_DATA_INPUT_PORT` ```c theme={null} #define AAC_DEC_DATA_INPUT_PORT 0x2 ``` ### `AAC_DEC_DATA_OUTPUT_PORT` ```c theme={null} #define AAC_DEC_DATA_OUTPUT_PORT 0x1 ``` ### `AAC_DEC_DATA_MAX_INPUT_PORTS` ```c theme={null} #define AAC_DEC_DATA_MAX_INPUT_PORTS 0x1 ``` ### `AAC_DEC_DATA_MAX_OUTPUT_PORTS` ```c theme={null} #define AAC_DEC_DATA_MAX_OUTPUT_PORTS 0x1 ``` ### `AAC_DEC_MODULE_STACK_SIZE` ```c theme={null} #define AAC_DEC_MODULE_STACK_SIZE 4096 ``` ### `AAC_SBR_OFF_PS_OFF` Flag to turn off both SBR and PS processing, if they are present in the bit stream. ```c theme={null} #define AAC_SBR_OFF_PS_OFF (2) ``` ### `AAC_SBR_ON_PS_OFF` Flag to turn on SBR but turn off PS processing,if they are present in the bit stream. ```c theme={null} #define AAC_SBR_ON_PS_OFF (1) ``` ### `AAC_SBR_ON_PS_ON` Flag to turn on both SBR and PS processing, if they are present in the bit stream (default behavior) ```c theme={null} #define AAC_SBR_ON_PS_ON (0) ``` ### `AAC_DUAL_MONO_MAP_SCE_1` First single channel element in a dual mono bit stream. ```c theme={null} #define AAC_DUAL_MONO_MAP_SCE_1 (1) ``` ### `AAC_DUAL_MONO_MAP_SCE_2` Second single channel element in a dual mono bit stream. ```c theme={null} #define AAC_DUAL_MONO_MAP_SCE_2 (2) ``` ### `AAC_EXTENSION_AOT_LC` AAC extension audio object type is Low Complexity (LC) ```c theme={null} #define AAC_EXTENSION_AOT_LC 2 ``` ### `AAC_EXTENSION_AOT_SBR` AAC extension audio object type is SBR. ```c theme={null} #define AAC_EXTENSION_AOT_SBR 5 ``` ### `AAC_EXTENSION_AOT_PS` AAC extension audio object type is PS. ```c theme={null} #define AAC_EXTENSION_AOT_PS 29 ``` ### `AAC_STEREO_MIX_COEFF_ISO` Use AAC stereo mix coefficients defined in ISO/IEC. ```c theme={null} #define AAC_STEREO_MIX_COEFF_ISO (0) ``` ### `AAC_STEREO_MIX_COEFF_ARIB` Use AAC stereo mix coefficients defined in ARIB. ```c theme={null} #define AAC_STEREO_MIX_COEFF_ARIB (1) ``` ### `PARAM_ID_AAC_SBR_PS_FLAG` Parameter ID of the AAC decoder SBR/PS Enable flag. ```c theme={null} #define PARAM_ID_AAC_SBR_PS_FLAG 0x08001054 ``` ### `PARAM_ID_AAC_DUAL_MONO_MAPPING` ID of parameter for configuring AAC decoder dual mono mapping. ```c theme={null} #define PARAM_ID_AAC_DUAL_MONO_MAPPING 0x08001055 ``` ### `PARAM_ID_AAC_SBR_SIGNALLING` ID of parameter for configuring AAC decoder SBR signalling. ```c theme={null} #define PARAM_ID_AAC_SBR_SIGNALLING 0x08001056 ``` ### `PARAM_ID_AAC_STEREO_MIX_COEFF_SELECTION_FLAG` ID of the AAC decoder Stereo Mixing parameter. ```c theme={null} #define PARAM_ID_AAC_STEREO_MIX_COEFF_SELECTION_FLAG 0x08001057 ``` ### `MODULE_ID_AAC_DEC` ```c theme={null} #define MODULE_ID_AAC_DEC 0x0700101F ```