1/*
2 * Copyright (c) 2024 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 *     http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15#ifndef foodownmixhfoo
16#define foodownmixhfoo
17#include <pulse/channelmap.h>
18#include <config.h>
19#include <pulsecore/bitset.h>
20
21/* formats that can be downmixed with channelMixMatrix */
22typedef enum pa_channel_layout_index {
23    PA_CHANNEL_LAYOUT_OTHER = -1,
24    PA_CHANNEL_LAYOUT_STEREO = 0,
25    PA_CHANNEL_LAYOUT_5POINT1,
26    PA_CHANNEL_LAYOUT_5POINT1POINT2,
27    PA_CHANNEL_LAYOUT_5POINT1POINT4,
28    PA_CHANNEL_LAYOUT_7POINT1,
29    PA_CHANNEL_LAYOUT_7POINT1POINT2,
30    PA_CHANNEL_LAYOUT_7POINT1POINT4,
31    PA_CHANNEL_LAYOUT_COUNT
32} pa_channel_layout_index_t;
33
34#define RESCALE_COEF 10000
35#define SKIPPED_CHANNEL_COUNT 32
36enum channel_position_downmix {
37    PA_DOWNMIX_POSITION_TOP_CENTER = PA_CHANNEL_POSITION_TOP_CENTER - SKIPPED_CHANNEL_COUNT,   /* AUX0 - AUX31 unused */
38    PA_DOWNMIX_POSITION_TOP_FRONT_LEFT,           /**< Apple calls this 'Vertical Height Left' */
39    PA_DOWNMIX_POSITION_TOP_FRONT_RIGHT,          /**< Apple calls this 'Vertical Height Right' */
40    PA_DOWNMIX_POSITION_TOP_FRONT_CENTER,         /**< Apple calls this 'Vertical Height Center' */
41    PA_DOWNMIX_POSITION_TOP_REAR_LEFT,            /**< Microsoft and Apple call this 'Top Back Left' */
42    PA_DOWNMIX_POSITION_TOP_REAR_RIGHT,           /**< Microsoft and Apple call this 'Top Back Right' */
43    PA_DOWNMIX_POSITION_TOP_REAR_CENTER,          /**< Microsoft and Apple call this 'Top Back Center' */
44    PA_DOWNMIX_CHANNEL_MAX
45};
46
47extern const uint16_t channelDownmixMatrix[PA_CHANNEL_LAYOUT_COUNT][PA_DOWNMIX_CHANNEL_MAX][PA_DOWNMIX_CHANNEL_MAX];
48
49/* check if input channel map is supported by downmix matrix, otherwise return PA_FORMAT_OTHER*/
50pa_channel_layout_index_t pa_channel_map_to_index(const pa_channel_map *map) PA_GCC_PURE;
51int pa_to_downmix_position(const pa_channel_position_t channel_position);
52
53#endif