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      1 /* AudioUsbALSA.h
      2 
      3 Copyright (c) 2012, Code Aurora Forum. All rights reserved.
      4 
      5 Redistribution and use in source and binary forms, with or without
      6 modification, are permitted provided that the following conditions are
      7 met:
      8     * Redistributions of source code must retain the above copyright
      9       notice, this list of conditions and the following disclaimer.
     10     * Redistributions in binary form must reproduce the above
     11       copyright notice, this list of conditions and the following
     12       disclaimer in the documentation and/or other materials provided
     13       with the distribution.
     14     * Neither the name of Code Aurora Forum, Inc. nor the names of its
     15       contributors may be used to endorse or promote products derived
     16       from this software without specific prior written permission.
     17 
     18 THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
     19 WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     20 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
     21 ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
     22 BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     23 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     24 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
     25 BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     26 WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
     27 OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
     28 IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.*/
     29 
     30 #ifndef ANDROID_AUDIO_USB_ALSA_H
     31 #define ANDROID_AUDIO_USB_ALSA_H
     32 
     33 #include <utils/List.h>
     34 #include <hardware_legacy/AudioHardwareBase.h>
     35 
     36 #include <hardware_legacy/AudioHardwareInterface.h>
     37 #include <hardware_legacy/AudioSystemLegacy.h>
     38 #include <system/audio.h>
     39 #include <hardware/audio.h>
     40 #include <utils/threads.h>
     41 
     42 #define DEFAULT_BUFFER_SIZE   2048
     43 #define POLL_TIMEOUT   3000
     44 #define DEFAULT_CHANNEL_MODE  2
     45 #define CHANNEL_MODE_ONE  1
     46 #define PROXY_DEFAULT_SAMPLING_RATE 48000
     47 #define SIGNAL_EVENT_TIMEOUT 1
     48 #define SIGNAL_EVENT_KILLTHREAD 2
     49 
     50 #define BUFFSIZE 1000000
     51 
     52 #define PATH "/proc/asound/card1/stream0"
     53 
     54 extern "C" {
     55    #include <sound/asound.h>
     56    #include "alsa_audio.h"
     57    #include "msm8960_use_cases.h"
     58 }
     59 
     60 #include <hardware/hardware.h>
     61 
     62 namespace android_audio_legacy
     63 {
     64 using android::List;
     65 using android::Mutex;
     66 class AudioUsbALSA;
     67 
     68 class AudioUsbALSA
     69 {
     70 private:
     71     int mproxypfdPlayback;
     72     int musbpfdPlayback;
     73     int mnfdsPlayback;
     74     int mnfdsRecording;
     75     int mtimeOut;
     76     int mtimeOutRecording;
     77     struct pcm *mproxyRecordingHandle;
     78     struct pcm *musbRecordingHandle;
     79     struct pcm *mproxyPlaybackHandle;
     80     struct pcm *musbPlaybackHandle;
     81     u_int8_t *mdstUsb_addr;
     82     u_int8_t *msrcProxy_addr;
     83     bool mkillPlayBackThread;
     84     bool mkillRecordingThread;
     85     pthread_t mPlaybackUsb;
     86     pthread_t mRecordingUsb;
     87     snd_use_case_mgr_t *mUcMgr;
     88 
     89     //Helper functions
     90     struct pcm * configureDevice(unsigned flags, char* hw, int sampleRate, int channelCount, int periodSize, bool playback);
     91     status_t syncPtr(struct pcm *handle, bool *killThread);
     92 
     93     //playback
     94     void pollForProxyData();
     95     void pollForUsbData();
     96 
     97     //recording
     98     void pollForUsbDataForRecording();
     99     void pollForProxyDataForRecording();
    100 
    101     status_t startDevice(pcm *handle, bool *killThread);
    102 
    103     void PlaybackThreadEntry();
    104     static void *PlaybackThreadWrapper(void *me);
    105 
    106     void RecordingThreadEntry();
    107     static void *RecordingThreadWrapper(void *me);
    108 
    109     status_t setHardwareParams(pcm *local_handle, uint32_t sampleRate, uint32_t channels, int periodSize);
    110 
    111     status_t setSoftwareParams(pcm *pcm, bool playback);
    112 
    113     status_t closeDevice(pcm *handle);
    114 
    115     status_t getCap(char * type, int &channels, int &sampleRate);
    116     int         getnumOfRates(char *rateStr);
    117     int         mchannelsPlayback;
    118     int         msampleRatePlayback;
    119     int         mchannelsCapture;
    120     int         msampleRateCapture;
    121 
    122 public:
    123     AudioUsbALSA();
    124     virtual            ~AudioUsbALSA();
    125 
    126     void exitPlaybackThread(uint64_t writeVal);
    127     void exitRecordingThread(uint64_t writeVal);
    128     void setkillUsbRecordingThread(bool val);
    129     bool getkillUsbPlaybackThread() {
    130         return mkillPlayBackThread;
    131     }
    132     bool getkillUsbRecordingThread() {
    133         return mkillRecordingThread;
    134     }
    135     //Playback
    136     void startPlayback();
    137 
    138     //Capture
    139     void startRecording();
    140 };
    141 
    142 };        // namespace android_audio_legacy
    143 #endif    // ANDROID_AUDIO_USB_ALSA_H
    144