example/pc_speaker/pcm_lib.h

   1 /*
   2  * This program is free software; you can redistribute it and/or modify
   3  * it under the terms of the GNU General Public License version 2 as
   4  * published by the Free Software Foundation.
   5  * pcm_lib.h - lib declare head file
   6  *
   7  */
   8
   9 #ifndef __PCM_LIB_H__
  10 #define __PCM_LIB_H__
  11
  12 #define __LITTLE_ENDIAN
  13 #define LIMITED_FORMATS
  14 #define __force
  15
  16 #ifdef  __LITTLE_ENDIAN
  17 #define SNDRV_LITTLE_ENDIAN
  18 #else
  19 #ifdef __BIG_ENDIAN
  20 #define SNDRV_BIG_ENDIAN
  21 #else
  22 #error "Unsupported endian..."
  23 #endif
  24 #endif
  25
  26 typedef unsigned long snd_pcm_uframes_t;
  27 typedef signed long snd_pcm_sframes_t;
  28
  29 enum {
  30         SNDRV_PCM_STREAM_PLAYBACK = 0,
  31         SNDRV_PCM_STREAM_CAPTURE,
  32         SNDRV_PCM_STREAM_LAST = SNDRV_PCM_STREAM_CAPTURE,
  33 };
  34
  35 typedef int snd_pcm_state_t;
  36 #define /*SNDRV_*/SNDRV_PCM_STATE_OPEN          ((__force snd_pcm_state_t) 0) /* stream is open */
  37 #define SNDRV_PCM_STATE_SETUP           ((__force snd_pcm_state_t) 1) /* stream has a setup */
  38 #define SNDRV_PCM_STATE_PREPARED        ((__force snd_pcm_state_t) 2) /* stream is ready to start */
  39 #define SNDRV_PCM_STATE_RUNNING         ((__force snd_pcm_state_t) 3) /* stream is running */
  40 #define SNDRV_PCM_STATE_XRUN            ((__force snd_pcm_state_t) 4) /* stream reached an xrun */
  41 #define SNDRV_PCM_STATE_DRAINING        ((__force snd_pcm_state_t) 5) /* stream is draining */
  42 #define SNDRV_PCM_STATE_PAUSED          ((__force snd_pcm_state_t) 6) /* stream is paused */
  43 #define SNDRV_PCM_STATE_SUSPENDED       ((__force snd_pcm_state_t) 7) /* hardware is suspended */
  44 #define SNDRV_PCM_STATE_DISCONNECTED    ((__force snd_pcm_state_t) 8) /* hardware is disconnected */
  45 #define SNDRV_PCM_STATE_LAST            SNDRV_PCM_STATE_DISCONNECTED
  46
  47 typedef int  snd_pcm_access_t;
  48 #define SNDRV_PCM_ACCESS_INTERLEAVED    ((__force snd_pcm_access_t) 0) /* interleaved  ,only support this accesse */
  49 #define SNDRV_PCM_ACCESS_NONINTERLEAVED ((__force snd_pcm_access_t) 1) /* noninterleaved  */
  50 #define SNDRV_PCM_ACCESS_COMPLEX                ((__force snd_pcm_access_t) 2) /* complex  */
  51 #define SNDRV_PCM_ACCESS_LAST           SNDRV_PCM_ACCESS_COMPLEX
  52
  53 /* pcm format */
  54 typedef int   snd_pcm_format_t;
  55 #define SNDRV_PCM_FORMAT_S8     ((__force snd_pcm_format_t) 0)
  56 #define SNDRV_PCM_FORMAT_U8     ((__force snd_pcm_format_t) 1)
  57 #define SNDRV_PCM_FORMAT_S16_LE ((__force snd_pcm_format_t) 2)
  58 #define SNDRV_PCM_FORMAT_S16_BE ((__force snd_pcm_format_t) 3)
  59 #define SNDRV_PCM_FORMAT_U16_LE ((__force snd_pcm_format_t) 4)
  60 #define SNDRV_PCM_FORMAT_U16_BE ((__force snd_pcm_format_t) 5)
  61 #define SNDRV_PCM_FORMAT_S24_LE ((__force snd_pcm_format_t) 6) /* low three bytes */
  62 #define SNDRV_PCM_FORMAT_S24_BE ((__force snd_pcm_format_t) 7) /* low three bytes */
  63 #define SNDRV_PCM_FORMAT_U24_LE ((__force snd_pcm_format_t) 8) /* low three bytes */
  64 #define SNDRV_PCM_FORMAT_U24_BE ((__force snd_pcm_format_t) 9) /* low three bytes */
  65 #define SNDRV_PCM_FORMAT_S32_LE ((__force snd_pcm_format_t) 10)
  66 #define SNDRV_PCM_FORMAT_S32_BE ((__force snd_pcm_format_t) 11)
  67 #define SNDRV_PCM_FORMAT_U32_LE ((__force snd_pcm_format_t) 12)
  68 #define SNDRV_PCM_FORMAT_U32_BE ((__force snd_pcm_format_t) 13)
  69 #if 0
  70 #define SNDRV_PCM_FORMAT_FLOAT_LE       ((__force snd_pcm_format_t) 14) /* 4-byte float, IEEE-754 32-bit, range -1.0 to 1.0 */
  71 #define SNDRV_PCM_FORMAT_FLOAT_BE       ((__force snd_pcm_format_t) 15) /* 4-byte float, IEEE-754 32-bit, range -1.0 to 1.0 */
  72 #define SNDRV_PCM_FORMAT_FLOAT64_LE     ((__force snd_pcm_format_t) 16) /* 8-byte float, IEEE-754 64-bit, range -1.0 to 1.0 */
  73 #define SNDRV_PCM_FORMAT_FLOAT64_BE     ((__force snd_pcm_format_t) 17) /* 8-byte float, IEEE-754 64-bit, range -1.0 to 1.0 */
  74 #else
  75 #define SNDRV_PCM_FORMAT_S24_3LE        ((__force snd_pcm_format_t) 14) /* in three bytes */
  76 #define SNDRV_PCM_FORMAT_S24_3BE        ((__force snd_pcm_format_t) 15) /* in three bytes */
  77 #define SNDRV_PCM_FORMAT_U24_3LE        ((__force snd_pcm_format_t) 16) /* in three bytes */
  78 #define SNDRV_PCM_FORMAT_U24_3BE        ((__force snd_pcm_format_t) 17) /* in three bytes */
  79 #endif
  80 #define SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE ((__force snd_pcm_format_t) 18) /* IEC-958 subframe, Little Endian */
  81 #define SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE ((__force snd_pcm_format_t) 19) /* IEC-958 subframe, Big Endian */
  82 #define SNDRV_PCM_FORMAT_MU_LAW         ((__force snd_pcm_format_t) 20)
  83 #define SNDRV_PCM_FORMAT_A_LAW          ((__force snd_pcm_format_t) 21)
  84 #define SNDRV_PCM_FORMAT_IMA_ADPCM      ((__force snd_pcm_format_t) 22)
  85 #define SNDRV_PCM_FORMAT_MPEG           ((__force snd_pcm_format_t) 23)
  86 #define SNDRV_PCM_FORMAT_GSM            ((__force snd_pcm_format_t) 24)
  87 #define SNDRV_PCM_FORMAT_SPECIAL        ((__force snd_pcm_format_t) 31)
  88 #if 0
  89 #define SNDRV_PCM_FORMAT_S24_3LE        ((__force snd_pcm_format_t) 32) /* in three bytes */
  90 #define SNDRV_PCM_FORMAT_S24_3BE        ((__force snd_pcm_format_t) 33) /* in three bytes */
  91 #define SNDRV_PCM_FORMAT_U24_3LE        ((__force snd_pcm_format_t) 34) /* in three bytes */
  92 #define SNDRV_PCM_FORMAT_U24_3BE        ((__force snd_pcm_format_t) 35) /* in three bytes */
  93 #else
  94 #define SNDRV_PCM_FORMAT_FLOAT_LE       ((__force snd_pcm_format_t) 32) /* 4-byte float, IEEE-754 32-bit, range -1.0 to 1.0 */
  95 #define SNDRV_PCM_FORMAT_FLOAT_BE       ((__force snd_pcm_format_t) 33) /* 4-byte float, IEEE-754 32-bit, range -1.0 to 1.0 */
  96 #define SNDRV_PCM_FORMAT_FLOAT64_LE     ((__force snd_pcm_format_t) 34) /* 8-byte float, IEEE-754 64-bit, range -1.0 to 1.0 */
  97 #define SNDRV_PCM_FORMAT_FLOAT64_BE     ((__force snd_pcm_format_t) 35) /* 8-byte float, IEEE-754 64-bit, range -1.0 to 1.0 */
  98 #endif
  99 #define SNDRV_PCM_FORMAT_S20_3LE        ((__force snd_pcm_format_t) 36) /* in three bytes */
 100 #define SNDRV_PCM_FORMAT_S20_3BE        ((__force snd_pcm_format_t) 37) /* in three bytes */
 101 #define SNDRV_PCM_FORMAT_U20_3LE        ((__force snd_pcm_format_t) 38) /* in three bytes */
 102 #define SNDRV_PCM_FORMAT_U20_3BE        ((__force snd_pcm_format_t) 39) /* in three bytes */
 103 #define SNDRV_PCM_FORMAT_S18_3LE        ((__force snd_pcm_format_t) 40) /* in three bytes */
 104 #define SNDRV_PCM_FORMAT_S18_3BE        ((__force snd_pcm_format_t) 41) /* in three bytes */
 105 #define SNDRV_PCM_FORMAT_U18_3LE        ((__force snd_pcm_format_t) 42) /* in three bytes */
 106 #define SNDRV_PCM_FORMAT_U18_3BE        ((__force snd_pcm_format_t) 43) /* in three bytes */
 107 #define SNDRV_PCM_FORMAT_G723_24        ((__force snd_pcm_format_t) 44) /* 8 samples in 3 bytes */
 108 #define SNDRV_PCM_FORMAT_G723_24_1B     ((__force snd_pcm_format_t) 45) /* 1 sample in 1 byte */
 109 #define SNDRV_PCM_FORMAT_G723_40        ((__force snd_pcm_format_t) 46) /* 8 Samples in 5 bytes */
 110 #define SNDRV_PCM_FORMAT_G723_40_1B     ((__force snd_pcm_format_t) 47) /* 1 sample in 1 byte */
 111 #ifndef  LIMITED_FORMATS
 112 #define SNDRV_PCM_FORMAT_LAST           SNDRV_PCM_FORMAT_G723_40_1B
 113 #else
 114 #if 0
 115 #define SNDRV_PCM_FORMAT_LAST           SNDRV_PCM_FORMAT_U32_BE
 116 #else
 117 #define SNDRV_PCM_FORMAT_LAST           SNDRV_PCM_FORMAT_U24_3BE
 118 #endif
 119 #endif
 120
 121 #ifdef SNDRV_LITTLE_ENDIAN
 122 #define SNDRV_PCM_FORMAT_S16            SNDRV_PCM_FORMAT_S16_LE
 123 #define SNDRV_PCM_FORMAT_U16            SNDRV_PCM_FORMAT_U16_LE
 124 #define SNDRV_PCM_FORMAT_S24            SNDRV_PCM_FORMAT_S24_LE
 125 #define SNDRV_PCM_FORMAT_U24            SNDRV_PCM_FORMAT_U24_LE
 126 #define SNDRV_PCM_FORMAT_S32            SNDRV_PCM_FORMAT_S32_LE
 127 #define SNDRV_PCM_FORMAT_U32            SNDRV_PCM_FORMAT_U32_LE
 128 #define SNDRV_PCM_FORMAT_FLOAT          SNDRV_PCM_FORMAT_FLOAT_LE
 129 #define SNDRV_PCM_FORMAT_FLOAT64        SNDRV_PCM_FORMAT_FLOAT64_LE
 130 #define SNDRV_PCM_FORMAT_IEC958_SUBFRAME SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE
 131 #endif
 132 #ifdef SNDRV_BIG_ENDIAN
 133 #define SNDRV_PCM_FORMAT_S16            SNDRV_PCM_FORMAT_S16_BE
 134 #define SNDRV_PCM_FORMAT_U16            SNDRV_PCM_FORMAT_U16_BE
 135 #define SNDRV_PCM_FORMAT_S24            SNDRV_PCM_FORMAT_S24_BE
 136 #define SNDRV_PCM_FORMAT_U24            SNDRV_PCM_FORMAT_U24_BE
 137 #define SNDRV_PCM_FORMAT_S32            SNDRV_PCM_FORMAT_S32_BE
 138 #define SNDRV_PCM_FORMAT_U32            SNDRV_PCM_FORMAT_U32_BE
 139 #define SNDRV_PCM_FORMAT_FLOAT          SNDRV_PCM_FORMAT_FLOAT_BE
 140 #define SNDRV_PCM_FORMAT_FLOAT64        SNDRV_PCM_FORMAT_FLOAT64_BE
 141 #define SNDRV_PCM_FORMAT_IEC958_SUBFRAME SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE
 142 #endif
 143
 144 /* pcm params  */
 145 #define SNDRV_MASK_BITS         64      /* we use so far 64bits only */
 146 #define SNDRV_MASK_SIZE         (SNDRV_MASK_BITS / 32)
 147 #define MASK_OFS(i)                     ((i) >> 5)
 148 #define MASK_BIT(i)                     (1U << ((i) & 31))
 149
 150 struct snd_pcm_params {
 151         snd_pcm_access_t access;        /* access mode */
 152         //unsigned int fifo_bits;
 153
 154         snd_pcm_format_t format;        /* SNDRV_PCM_FORMAT_* */
 155         unsigned int rate;              /* rate in Hz  ,sample rate */
 156         unsigned int channels;          /* channels */
 157         snd_pcm_uframes_t period_size;  /* interrput period ( sample unit ) */
 158         unsigned int periods;           /* periods */
 159         /* snd_pcm_uframes_t buffer_size; */
 160         unsigned int buffer_bytes;
 161
 162         snd_pcm_uframes_t start_threshold;      /* min hw_avail frames for automatic start */
 163         snd_pcm_uframes_t stop_threshold;       /* min avail frames for automatic stop */
 164         snd_pcm_uframes_t silence_threshold;    /* min distance from noise for silence filling */
 165         snd_pcm_uframes_t silence_size;         /* silence block size */
 166         /* snd_pcm_uframes_t boundary;*/        /* pointers wrap point */
 167 };
 168
 169 #define  NON_BLOCK   1
 170 #define  RW_BLOCK     0
 171
 172 #define THRESHOLD_BOUNDARY     0xFFFFFFFF
 173
 174 extern unsigned int sys_dma_inited;     /* set by other driver that already inited dma */
 175
 176 /* declare function */
 177 int pcm_format_width(snd_pcm_format_t format);
 178 int pcm_format_physical_width(snd_pcm_format_t format);
 179 int pcm_format_little_endian(snd_pcm_format_t format);
 180
 181 /* extern function */
 182 size_t u_audio_playback(void * handle, void *buf, size_t count);
 183 snd_pcm_sframes_t snd_pcm_lib_write(void * handle, unsigned long data, snd_pcm_uframes_t size ,int nonblock);
 184 int     snd_pcm_params(void * handle, struct snd_pcm_params *params);
 185 int     pcm_stream_init(void ** handle , unsigned int direction,struct snd_pcm_params *params);
 186 void    pcm_stream_deinit(void * handle);
 187 int pcm_stream_rate(void * handle);
 188 int snd_pcm_get_avail_rate(void * handle);
 189 snd_pcm_sframes_t snd_pcm_lib_read(void * handle,  unsigned long data,
 190                                                                         snd_pcm_uframes_t size  ,int nonblock);
 191
 192 #endif  // __PCM_LIB_H__
 193