168 lines
4.8 KiB
C
Executable File
168 lines
4.8 KiB
C
Executable File
/*
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** Copyright 2010, The Android Open-Source Project
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**
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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**
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** http://www.apache.org/licenses/LICENSE-2.0
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**
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*/
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#ifndef _AUDIO_H_
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#define _AUDIO_H_
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#define PCM_OUT 0x00000000
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#define PCM_IN 0x10000000
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#define PCM_STEREO 0x00000000
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#define PCM_MONO 0x01000000
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#define PCM_44100HZ 0x00000000
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#define PCM_48000HZ 0x00100000
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#define PCM_8000HZ 0x00200000
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#define PCM_RATE_MASK 0x00F00000
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#define PCM_DEVICE0 0x00000000
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#define PCM_DEVICE1 0x00000010
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#define PCM_DEVICE2 0x00000020
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#define PCM_DEVICE_MASK 0x000000F0
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#define PCM_DEVICE_SHIFT 4
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#define PCM_CARD0 0x00000000
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#define PCM_CARD1 0x00000001
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#define PCM_CARD2 0x00000002
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#define PCM_CARD_MASK 0x0000000F
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#define PCM_CARD_SHIFT 0
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#define PCM_PERIOD_CNT_MIN 3
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#define PCM_PERIOD_CNT_SHIFT 16
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#define PCM_PERIOD_CNT_MASK (0xF << PCM_PERIOD_CNT_SHIFT)
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#define PCM_PERIOD_SZ_MIN 64
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#define PCM_PERIOD_SZ_SHIFT 12
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#define PCM_PERIOD_SZ_MASK (0xF << PCM_PERIOD_SZ_SHIFT)
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typedef enum _AudioRoute {
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SPEAKER_NORMAL_ROUTE = 0,
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SPEAKER_INCALL_ROUTE, // 1
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SPEAKER_RINGTONE_ROUTE,
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SPEAKER_VOIP_ROUTE,
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EARPIECE_NORMAL_ROUTE, // 4
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EARPIECE_INCALL_ROUTE,
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EARPIECE_RINGTONE_ROUTE,
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EARPIECE_VOIP_ROUTE,
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HEADPHONE_NORMAL_ROUTE, // 8
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HEADPHONE_INCALL_ROUTE,
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HEADPHONE_RINGTONE_ROUTE,
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SPEAKER_HEADPHONE_NORMAL_ROUTE,
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SPEAKER_HEADPHONE_RINGTONE_ROUTE,
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HEADPHONE_VOIP_ROUTE,
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HEADSET_NORMAL_ROUTE, // 14
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HEADSET_INCALL_ROUTE,
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HEADSET_RINGTONE_ROUTE,
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HEADSET_VOIP_ROUTE,
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BLUETOOTH_NORMAL_ROUTE, // 18
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BLUETOOTH_INCALL_ROUTE,
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BLUETOOTH_VOIP_ROUTE,
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MAIN_MIC_CAPTURE_ROUTE, // 21
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HANDS_FREE_MIC_CAPTURE_ROUTE,
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BLUETOOTH_SOC_MIC_CAPTURE_ROUTE,
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PLAYBACK_OFF_ROUTE, // 24
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CAPTURE_OFF_ROUTE,
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INCALL_OFF_ROUTE,
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VOIP_OFF_ROUTE,
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HDMI_NORMAL_ROUTE, // 28
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USB_NORMAL_ROUTE, // 29
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USB_CAPTURE_ROUTE,
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MAX_ROUTE, // 31
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} AudioRoute;
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#define PCM_ERROR_MAX 128
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struct pcm {
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int fd;
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unsigned flags;
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int running:1;
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int underruns;
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unsigned buffer_size;
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char error[PCM_ERROR_MAX];
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};
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/* Acquire/release a pcm channel.
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* Returns non-zero on error
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*/
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struct pcm *pcm_open(unsigned flags);
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int pcm_close(struct pcm *pcm);
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int pcm_ready(struct pcm *pcm);
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/* Returns a human readable reason for the last error. */
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const char *pcm_error(struct pcm *pcm);
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/* Returns the buffer size (int bytes) that should be used for pcm_write.
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* This will be 1/2 of the actual fifo size.
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*/
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unsigned pcm_buffer_size(struct pcm *pcm);
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/* Write data to the fifo.
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* Will start playback on the first write or on a write that
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* occurs after a fifo underrun.
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*/
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int pcm_write(struct pcm *pcm, void *data, unsigned count);
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int pcm_read(struct pcm *pcm, void *data, unsigned count);
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struct mixer_ctl {
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struct mixer *mixer;
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struct snd_ctl_elem_info *info;
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struct snd_ctl_tlv *tlv;
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char **ename;
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};
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struct mixer {
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int fd;
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struct snd_ctl_elem_info *info;
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struct mixer_ctl *ctl;
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unsigned count;
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};
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struct mixer *mixer_open(unsigned card);
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void mixer_close(struct mixer *mixer);
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void mixer_dump(struct mixer *mixer);
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struct mixer_ctl *mixer_get_control(struct mixer *mixer,
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const char *name, unsigned index);
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struct mixer_ctl *mixer_get_nth_control(struct mixer *mixer, unsigned n);
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int mixer_ctl_set(struct mixer_ctl *ctl, unsigned percent);
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int mixer_ctl_select(struct mixer_ctl *ctl, const char *value);
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void mixer_ctl_print(struct mixer_ctl *ctl);
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int mixer_ctl_set_int_double(struct mixer_ctl *ctl, long long left, long long right);
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int mixer_ctl_set_int(struct mixer_ctl *ctl, long long value);
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int mixer_tlv_get_dB_range(unsigned int *tlv, long rangemin, long rangemax,
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long *min, long *max);
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int mixer_get_ctl_minmax(struct mixer_ctl *ctl, long long *min, long long *max);
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int mixer_get_dB_range(struct mixer_ctl *ctl, long rangemin, long rangemax,
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float *dB_min, float *dB_max, float *dB_step);
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int route_init(void);
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void route_uninit(void);
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int route_set_input_source(const char *source);
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int route_set_voice_volume(const char *ctlName, float volume);
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int route_set_controls(unsigned route);
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struct pcm *route_pcm_open(unsigned route, unsigned int flags);
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int route_pcm_close(unsigned route);
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#endif
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