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/*

 * audio.h

 *

 * Copyright (C) 2000 Ralph  Metzler <ralph@convergence.de>

 *                  & Marcus Metzler <marcus@convergence.de>

 *                    for convergence integrated media GmbH

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Lesser Public License

 * as published by the Free Software Foundation; either version 2.1

 * of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

 *

 */

#ifndef _DVBAUDIO_H_

#define _DVBAUDIO_H_

#include <linux/types.h>

typedef enum {

        AUDIO_SOURCE_DEMUX, /* Select the demux as the main source */

        AUDIO_SOURCE_MEMORY /* Select internal memory as the main source */

} audio_stream_source_t;

typedef enum {

        AUDIO_STOPPED,      /* Device is stopped */

        AUDIO_PLAYING,      /* Device is currently playing */

        AUDIO_PAUSED        /* Device is paused */

} audio_play_state_t;

typedef enum {

        AUDIO_STEREO,

        AUDIO_MONO_LEFT,

        AUDIO_MONO_RIGHT,

        AUDIO_MONO,

        AUDIO_STEREO_SWAPPED

} audio_channel_select_t;

typedef struct audio_mixer {

        unsigned int volume_left;

        unsigned int volume_right;

  // what else do we need? bass, pass-through, ...

} audio_mixer_t;

typedef struct audio_status {

        int                    AV_sync_state;  /* sync audio and video? */

        int                    mute_state;     /* audio is muted */

        audio_play_state_t     play_state;     /* current playback state */

        audio_stream_source_t  stream_source;  /* current stream source */

        audio_channel_select_t channel_select; /* currently selected channel */

        int                    bypass_mode;    /* pass on audio data to */

        audio_mixer_t          mixer_state;    /* current mixer state */

} audio_status_t;                              /* separate decoder hardware */

typedef

struct audio_karaoke {  /* if Vocal1 or Vocal2 are non-zero, they get mixed  */

        int vocal1;    /* into left and right t at 70% each */

        int vocal2;    /* if both, Vocal1 and Vocal2 are non-zero, Vocal1 gets*/

        int melody;    /* mixed into the left channel and */

                       /* Vocal2 into the right channel at 100% each. */

                       /* if Melody is non-zero, the melody channel gets mixed*/

} audio_karaoke_t;     /* into left and right  */

typedef __u16 audio_attributes_t;

/*   bits: descr. */

/*   15-13 audio coding mode (0=ac3, 2=mpeg1, 3=mpeg2ext, 4=LPCM, 6=DTS, */

/*   12    multichannel extension */

/*   11-10 audio type (0=not spec, 1=language included) */

/*    9- 8 audio application mode (0=not spec, 1=karaoke, 2=surround) */

/*    7- 6 Quantization / DRC (mpeg audio: 1=DRC exists)(lpcm: 0=16bit,  */

/*    5- 4 Sample frequency fs (0=48kHz, 1=96kHz) */

/*    2- 0 number of audio channels (n+1 channels) */

/* for GET_CAPABILITIES and SET_FORMAT, the latter should only set one bit */

#define AUDIO_CAP_DTS    1

#define AUDIO_CAP_LPCM   2

#define AUDIO_CAP_MP1    4

#define AUDIO_CAP_MP2    8

#define AUDIO_CAP_MP3   16

#define AUDIO_CAP_AAC   32

#define AUDIO_CAP_OGG   64

#define AUDIO_CAP_SDDS 128

#define AUDIO_CAP_AC3  256

#define AUDIO_STOP                 _IO('o', 1)

#define AUDIO_PLAY                 _IO('o', 2)

#define AUDIO_PAUSE                _IO('o', 3)

#define AUDIO_CONTINUE             _IO('o', 4)

#define AUDIO_SELECT_SOURCE        _IO('o', 5)

#define AUDIO_SET_MUTE             _IO('o', 6)

#define AUDIO_SET_AV_SYNC          _IO('o', 7)

#define AUDIO_SET_BYPASS_MODE      _IO('o', 8)

#define AUDIO_CHANNEL_SELECT       _IO('o', 9)

#define AUDIO_GET_STATUS           _IOR('o', 10, audio_status_t)

#define AUDIO_GET_CAPABILITIES     _IOR('o', 11, unsigned int)

#define AUDIO_CLEAR_BUFFER         _IO('o',  12)

#define AUDIO_SET_ID               _IO('o', 13)

#define AUDIO_SET_MIXER            _IOW('o', 14, audio_mixer_t)

#define AUDIO_SET_STREAMTYPE       _IO('o', 15)

#define AUDIO_SET_EXT_ID           _IO('o', 16)

#define AUDIO_SET_ATTRIBUTES       _IOW('o', 17, audio_attributes_t)

#define AUDIO_SET_KARAOKE          _IOW('o', 18, audio_karaoke_t)

/**

 * AUDIO_GET_PTS

 *

 * Read the 33 bit presentation time stamp as defined

 * in ITU T-REC-H.222.0 / ISO/IEC 13818-1.

 *

 * The PTS should belong to the currently played

 * frame if possible, but may also be a value close to it

 * like the PTS of the last decoded frame or the last PTS

 * extracted by the PES parser.

 */

#define AUDIO_GET_PTS              _IOR('o', 19, __u64)

#define AUDIO_BILINGUAL_CHANNEL_SELECT _IO('o', 20)

#endif /* _DVBAUDIO_H_ */