1# avcodec_audio_channel_layout.h 2 3 4## Overview 5 6The **avcodec_audio_channel_layout.h** file declares the enums used for audio codec. 7 8**Since** 9 109 11 12**Related Modules** 13 14[AudioDecoder](_audio_decoder.md) 15 16 17## Summary 18 19 20### Enums 21 22| Name| Description| 23| -------- | -------- | 24| [OHOS::Media::AudioChannelSet](_audio_decoder.md#audiochannelset) : uint64_t {<br>**FRONT_LEFT** = 1ULL << 0U, **FRONT_RIGHT** = 1ULL << 1U, **FRONT_CENTER** = 1ULL << 2U, **LOW_FREQUENCY** = 1ULL << 3U,<br>**BACK_LEFT** = 1ULL << 4U, **BACK_RIGHT** = 1ULL << 5U, **FRONT_LEFT_OF_CENTER** = 1ULL << 6U, **FRONT_RIGHT_OF_CENTER** = 1ULL << 7U,<br>**BACK_CENTER** = 1ULL << 8U, **SIDE_LEFT** = 1ULL << 9U, **SIDE_RIGHT** = 1ULL << 10U, **TOP_CENTER** = 1ULL << 11U,<br>**TOP_FRONT_LEFT** = 1ULL << 12U, **TOP_FRONT_CENTER** = 1ULL << 13U, **TOP_FRONT_RIGHT** = 1ULL << 14U, **TOP_BACK_LEFT** = 1ULL << 15U,<br>**TOP_BACK_CENTER** = 1ULL << 16U, **TOP_BACK_RIGHT** = 1ULL << 17U, **STEREO_LEFT** = 1ULL << 29U, **STEREO_RIGHT** = 1ULL << 30U,<br>**WIDE_LEFT** = 1ULL << 31U, **WIDE_RIGHT** = 1ULL << 32U, **SURROUND_DIRECT_LEFT** = 1ULL << 33U, **SURROUND_DIRECT_RIGHT** = 1ULL << 34U,<br>**LOW_FREQUENCY_2** = 1ULL << 35U, **TOP_SIDE_LEFT** = 1ULL << 36U, **TOP_SIDE_RIGHT** = 1ULL << 37U, **BOTTOM_FRONT_CENTER** = 1ULL << 38U,<br>**BOTTOM_FRONT_LEFT** = 1ULL << 39U, **BOTTOM_FRONT_RIGHT** = 1ULL << 40U, **AMBISONICS_ACN0** = 1ULL << 41U, OHOS::Media::AMBISONICS_ACN1 = 1ULL << 42U,<br>OHOS::Media::AMBISONICS_ACN2 = 1ULL << 43U, OHOS::Media::AMBISONICS_ACN3 = 1ULL << 44U, OHOS::Media::AMBISONICS_W = AMBISONICS_ACN0, OHOS::Media::AMBISONICS_Y = AMBISONICS_ACN1,<br>OHOS::Media::AMBISONICS_Z = AMBISONICS_ACN2, OHOS::Media::AMBISONICS_X = AMBISONICS_ACN3, OHOS::Media::AMBISONICS_ACN4 = 1ULL << 45U, OHOS::Media::AMBISONICS_ACN5 = 1ULL << 46U,<br>OHOS::Media::AMBISONICS_ACN6 = 1ULL << 47U, OHOS::Media::AMBISONICS_ACN7 = 1ULL << 48U, OHOS::Media::AMBISONICS_ACN8 = 1ULL << 49U, OHOS::Media::AMBISONICS_ACN9 = 1ULL << 50U,<br>OHOS::Media::AMBISONICS_ACN10 = 1ULL << 51U, OHOS::Media::AMBISONICS_ACN11 = 1ULL << 52U, OHOS::Media::AMBISONICS_ACN12 = 1ULL << 53U, OHOS::Media::AMBISONICS_ACN13 = 1ULL << 54U,<br>OHOS::Media::AMBISONICS_ACN14 = 1ULL << 55U, OHOS::Media::AMBISONICS_ACN15 = 1ULL << 56U<br>} | Enumerates the audio channel numbers. Each channel number is mapped to a variable of int64.| 25| [OHOS::Media::AudioChannelLayout](_audio_decoder.md#audiochannellayout) : uint64_t {<br>**UNKNOWN_CHANNEL_LAYOUT** = 0, **MONO** = (AudioChannelSet::FRONT_CENTER), **STEREO** = (AudioChannelSet::FRONT_LEFT \| AudioChannelSet::FRONT_RIGHT), **CH_2POINT1** = (STEREO \| AudioChannelSet::LOW_FREQUENCY),<br>**CH_2_1** = (STEREO \| AudioChannelSet::BACK_CENTER), **SURROUND** = (STEREO \| AudioChannelSet::FRONT_CENTER), **CH_3POINT1** = (SURROUND \| AudioChannelSet::LOW_FREQUENCY), **CH_4POINT0** = (SURROUND \| AudioChannelSet::BACK_CENTER),<br>**CH_4POINT1** = (CH_4POINT0 \| AudioChannelSet::LOW_FREQUENCY), **CH_2_2** = (STEREO \| AudioChannelSet::SIDE_LEFT \| AudioChannelSet::SIDE_RIGHT), **QUAD** = (STEREO \| AudioChannelSet::BACK_LEFT \| AudioChannelSet::BACK_RIGHT), **CH_5POINT0** = (SURROUND \| AudioChannelSet::SIDE_LEFT \| AudioChannelSet::SIDE_RIGHT),<br>**CH_5POINT1** = (CH_5POINT0 \| AudioChannelSet::LOW_FREQUENCY), **CH_5POINT0_BACK** = (SURROUND \| AudioChannelSet::BACK_LEFT \| AudioChannelSet::BACK_RIGHT), **CH_5POINT1_BACK** = (CH_5POINT0_BACK \| AudioChannelSet::LOW_FREQUENCY), **CH_6POINT0** = (CH_5POINT0 \| AudioChannelSet::BACK_CENTER),<br>**CH_6POINT0_FRONT** = (CH_2_2 \| AudioChannelSet::FRONT_LEFT_OF_CENTER \| AudioChannelSet::FRONT_RIGHT_OF_CENTER), **HEXAGONAL** = (CH_5POINT0_BACK \| AudioChannelSet::BACK_CENTER), **CH_6POINT1** = (CH_5POINT1 \| AudioChannelSet::BACK_CENTER), **CH_6POINT1_BACK** = (CH_5POINT1_BACK \| AudioChannelSet::BACK_CENTER),<br>**CH_6POINT1_FRONT** = (CH_6POINT0_FRONT \| AudioChannelSet::LOW_FREQUENCY), **CH_7POINT0** = (CH_5POINT0 \| AudioChannelSet::BACK_LEFT \| AudioChannelSet::BACK_RIGHT), **CH_7POINT0_FRONT** = (CH_5POINT0 \| AudioChannelSet::FRONT_LEFT_OF_CENTER \| AudioChannelSet::FRONT_RIGHT_OF_CENTER), **CH_7POINT1** = (CH_5POINT1 \| AudioChannelSet::BACK_LEFT \| AudioChannelSet::BACK_RIGHT),<br>**CH_7POINT1_WIDE** = (CH_5POINT1 \| AudioChannelSet::FRONT_LEFT_OF_CENTER \| AudioChannelSet::FRONT_RIGHT_OF_CENTER), **CH_7POINT1_WIDE_BACK**, **CH_3POINT1POINT2** = (CH_3POINT1 \| AudioChannelSet::TOP_FRONT_LEFT \| AudioChannelSet::TOP_FRONT_RIGHT), **CH_5POINT1POINT2** = (CH_5POINT1 \| AudioChannelSet::TOP_SIDE_LEFT \| AudioChannelSet::TOP_SIDE_RIGHT),<br>**CH_5POINT1POINT4**, **CH_7POINT1POINT2** = (CH_7POINT1 \| AudioChannelSet::TOP_SIDE_LEFT \| AudioChannelSet::TOP_SIDE_RIGHT), **CH_7POINT1POINT4**, **CH_9POINT1POINT4** = (CH_7POINT1POINT4 \| AudioChannelSet::WIDE_LEFT \| AudioChannelSet::WIDE_RIGHT),<br>**CH_9POINT1POINT6** = (CH_9POINT1POINT4 \| AudioChannelSet::TOP_SIDE_LEFT \| AudioChannelSet::TOP_SIDE_RIGHT), **CH_10POINT2**, **CH_22POINT2**, **OCTAGONAL** = (CH_5POINT0 \| AudioChannelSet::BACK_LEFT \| AudioChannelSet::BACK_CENTER \| AudioChannelSet::BACK_RIGHT),<br>**HEXADECAGONAL**, **STEREO_DOWNMIX** = (AudioChannelSet::STEREO_LEFT \| AudioChannelSet::STEREO_RIGHT), **HOA_FIRST**, **HOA_SECOND**,<br>**HOA_THIRD**<br>} | Enumerates the types of the audio channel numbers. The output format of the decoder is represented as the channel type of the codec.| 26