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/*
**
** Copyright 2014, 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.
*/
#ifndef ANDROID_ALSA_UTILS_H
#define ANDROID_ALSA_UTILS_H
#include <fcntl.h>
#include <stdint.h>
#include <hardware/audio.h>
#define kHDMI_ALSADeviceName "IntelHDMI"
#ifdef __cplusplus
extern "C"
#endif
int find_alsa_card_by_name(const char* name);
#ifdef __cplusplus
#include <utils/Vector.h>
#include <utils/Mutex.h>
#include <utils/String8.h>
namespace android {
class HDMIAudioCaps {
public:
enum AudFormat {
kFmtInvalid = 0,
kFmtLPCM,
kFmtAC3,
kFmtMP1,
kFmtMP1L3,
kFmtMP2,
kFmtAACLC,
kFmtDTS,
kFmtATRAC,
kFmtDSD,
kFmtEAC3,
kFmtDTSHD,
kFmtMLP,
kFmtDST,
kFmtWMAPRO,
kFmtRefCxt,
kFmtHEAAC,
kFmtHEAAC2,
kFmtMPGSUR
};
enum SRMask {
kSR_32000 = (1 << 5),
kSR_44100 = (1 << 6),
kSR_48000 = (1 << 7),
kSR_88200 = (1 << 9),
kSR_96000 = (1 << 10),
kSR_176400 = (1 << 11),
kSR_192000 = (1 << 12),
};
enum BPSMask {
kBPS_16bit = (1 << 17),
kBPS_20bit = (1 << 18),
kBPS_24bit = (1 << 19),
};
enum SAMask {
kSA_FLFR = (1 << 0), // Front Left/Right
kSA_LFE = (1 << 1), // LFE (aka, subwoofer)
kSA_FC = (1 << 2), // Front Center
kSA_RLRR = (1 << 3), // Rear Left/Right
kSA_RC = (1 << 4), // Rear Center
kSA_FLCFRC = (1 << 5), // Front Left/Right Center
kSA_RLCRRC = (1 << 6), // Rear Left/Right Center
kSA_FLWFRW = (1 << 7), // Front Left/Right Wide
kSA_FLHFRH = (1 << 8), // Front Left/Right High
kSA_TC = (1 << 9), // Top Center (overhead)
kSA_FCH = (1 << 10), // Front Center High
};
typedef struct {
AudFormat fmt;
uint32_t max_ch;
uint32_t sr_bitmask;
uint32_t bps_bitmask;
uint32_t comp_bitrate;
} Mode;
HDMIAudioCaps();
~HDMIAudioCaps() { reset(); }
bool loadCaps(int ALSADeviceID);
void reset();
void getRatesForAF(String8& rates);
void getFmtsForAF(String8& fmts);
void getChannelMasksForAF(String8& masks);
bool supportsFormat(audio_format_t format,
uint32_t sampleRate,
uint32_t channelCount,
bool isIec958NonAudio);
bool basicAudioSupport() const { return mBasicAudioSupported; }
uint16_t speakerAllocation() const { return mSpeakerAlloc; }
size_t modeCnt() const { return mModes.size(); }
const Mode& getMode(size_t ndx) const { return mModes[ndx]; }
static const char* fmtToString(AudFormat fmt);
static uint32_t srMaskToSR(uint32_t mask);
static uint32_t bpsMaskToBPS(uint32_t mask);
static const char* saMaskToString(uint32_t mask);
private:
Mutex mLock;
bool mBasicAudioSupported;
uint16_t mSpeakerAlloc;
Vector<Mode> mModes;
void reset_l();
ssize_t getMaxChModeNdx_l();
static bool sanityCheckMode(const Mode& m);
};
} // namespace android
#endif // __cplusplus
#endif // ANDROID_ALSA_UTILS_H
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