| Value | Meaning |
|---|---|
| CEF_CHANNEL_LAYOUT_NONE0 | |
| CEF_CHANNEL_LAYOUT_UNSUPPORTED1 | |
| CEF_CHANNEL_LAYOUT_MONO2 | Front C |
| CEF_CHANNEL_LAYOUT_STEREO3 | Front L, Front R |
| CEF_CHANNEL_LAYOUT_2_14 | Front L, Front R, Back C |
| CEF_CHANNEL_LAYOUT_SURROUND5 | Front L, Front R, Front C |
| CEF_CHANNEL_LAYOUT_4_06 | Front L, Front R, Front C, Back C |
| CEF_CHANNEL_LAYOUT_2_27 | Front L, Front R, Side L, Side R |
| CEF_CHANNEL_LAYOUT_QUAD8 | Front L, Front R, Back L, Back R |
| CEF_CHANNEL_LAYOUT_5_09 | Front L, Front R, Front C, Side L, Side R |
| CEF_CHANNEL_LAYOUT_5_110 | Front L, Front R, Front C, LFE, Side L, Side R |
| CEF_CHANNEL_LAYOUT_5_0_BACK11 | Front L, Front R, Front C, Back L, Back R |
| CEF_CHANNEL_LAYOUT_5_1_BACK12 | Front L, Front R, Front C, LFE, Back L, Back R |
| CEF_CHANNEL_LAYOUT_7_013 | Front L, Front R, Front C, Back L, Back R, Side L, Side R |
| CEF_CHANNEL_LAYOUT_7_114 | Front L, Front R, Front C, LFE, Back L, Back R, Side L, Side R |
| CEF_CHANNEL_LAYOUT_7_1_WIDE15 | Front L, Front R, Front C, LFE, Front LofC, Front RofC, Side L, Side R |
| CEF_CHANNEL_LAYOUT_STEREO_DOWNMIX16 | Front L, Front R |
| CEF_CHANNEL_LAYOUT_2POINT117 | Front L, Front R, LFE |
| CEF_CHANNEL_LAYOUT_3_118 | Front L, Front R, Front C, LFE |
| CEF_CHANNEL_LAYOUT_4_119 | Front L, Front R, Front C, LFE, Back C |
| CEF_CHANNEL_LAYOUT_6_020 | Front L, Front R, Front C, Back C, Side L, Side R |
| CEF_CHANNEL_LAYOUT_6_0_FRONT21 | Front L, Front R, Front LofC, Front RofC, Side L, Side R |
| CEF_CHANNEL_LAYOUT_HEXAGONAL22 | Front L, Front R, Front C, Back L, Back R, Back C |
| CEF_CHANNEL_LAYOUT_6_123 | Front L, Front R, Front C, LFE, Back C, Side L, Side R |
| CEF_CHANNEL_LAYOUT_6_1_BACK24 | Front L, Front R, Front C, LFE, Back L, Back R, Back C |
| CEF_CHANNEL_LAYOUT_6_1_FRONT25 | Front L, Front R, LFE, Front LofC, Front RofC, Side L, Side R |
| CEF_CHANNEL_LAYOUT_7_0_FRONT26 | Front L, Front R, Front C, Front LofC, Front RofC, Side L, Side R |
| CEF_CHANNEL_LAYOUT_7_1_WIDE_BACK27 | Front L, Front R, Front C, LFE, Back L, Back R, Front LofC, Front RofC |
| CEF_CHANNEL_LAYOUT_OCTAGONAL28 | Front L, Front R, Front C, Back L, Back R, Back C, Side L, Side R |
| CEF_CHANNEL_LAYOUT_DISCRETE29 | Channels are not explicitly mapped to speakers. |
| CEF_CHANNEL_LAYOUT_STEREO_AND_KEYBOARD_MIC30 | Deprecated, but keeping the enum value for UMA consistency. Front L, Front R, Front C. Front C contains the keyboard mic audio. This layout is only intended for input for WebRTC. The Front C channel is stripped away in the WebRTC audio input pipeline and never seen outside of that. |
| CEF_CHANNEL_LAYOUT_4_1_QUAD_SIDE31 | Front L, Front R, LFE, Side L, Side R |
| CEF_CHANNEL_LAYOUT_BITSTREAM32 | Actual channel layout is specified in the bitstream and the actual channel count is unknown at Chromium media pipeline level (useful for audio pass-through mode). |
| CEF_CHANNEL_LAYOUT_5_1_4_DOWNMIX33 | Front L, Front R, Front C, LFE, Side L, Side R, Front Height L, Front Height R, Rear Height L, Rear Height R Will be represented as six channels (5.1) due to eight channel limit kMaxConcurrentChannels |
| CEF_CHANNEL_LAYOUT_1_134 | Front C, LFE |
| CEF_CHANNEL_LAYOUT_3_1_BACK35 | Front L, Front R, LFE, Back C |
| CEF_CHANNEL_LAYOUT_MAXCEF_CHANNEL_LAYOUT_3_1_BACK | Max value, must always equal the largest entry ever logged. |
Enumerates the various representations of the ordering of audio channels. Must be kept synchronized with media::ChannelLayout from Chromium. See media\base\channel_layout.h