audio/audio_int.h

   1 /*
   2  * QEMU Audio subsystem header
   3  *
   4  * Copyright (c) 2003-2005 Vassili Karpov (malc)
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24
  25 #ifndef QEMU_AUDIO_INT_H
  26 #define QEMU_AUDIO_INT_H
  27
  28 #ifdef CONFIG_AUDIO_COREAUDIO
  29 #define FLOAT_MIXENG
  30 /* #define RECIPROCAL */
  31 #endif
  32 #include "mixeng.h"
  33
  34 struct audio_pcm_ops;
  35
  36 struct audio_callback {
  37     void *opaque;
  38     audio_callback_fn fn;
  39 };
  40
  41 struct audio_pcm_info {
  42     int bits;
  43     bool is_signed;
  44     bool is_float;
  45     int freq;
  46     int nchannels;
  47     int bytes_per_frame;
  48     int bytes_per_second;
  49     int swap_endianness;
  50 };
  51
  52 typedef struct AudioState AudioState;
  53 typedef struct SWVoiceCap SWVoiceCap;
  54
  55 typedef struct STSampleBuffer {
  56     size_t pos, size;
  57     st_sample samples[];
  58 } STSampleBuffer;
  59
  60 typedef struct HWVoiceOut {
  61     AudioState *s;
  62     int enabled;
  63     int poll_mode;
  64     int pending_disable;
  65     struct audio_pcm_info info;
  66
  67     f_sample *clip;
  68     uint64_t ts_helper;
  69
  70     STSampleBuffer *mix_buf;
  71     void *buf_emul;
  72     size_t pos_emul, pending_emul, size_emul;
  73
  74     size_t samples;
  75     QLIST_HEAD (sw_out_listhead, SWVoiceOut) sw_head;
  76     QLIST_HEAD (sw_cap_listhead, SWVoiceCap) cap_head;
  77     struct audio_pcm_ops *pcm_ops;
  78     QLIST_ENTRY (HWVoiceOut) entries;
  79 } HWVoiceOut;
  80
  81 typedef struct HWVoiceIn {
  82     AudioState *s;
  83     int enabled;
  84     int poll_mode;
  85     struct audio_pcm_info info;
  86
  87     t_sample *conv;
  88
  89     size_t total_samples_captured;
  90     uint64_t ts_helper;
  91
  92     STSampleBuffer *conv_buf;
  93     void *buf_emul;
  94     size_t pos_emul, pending_emul, size_emul;
  95
  96     size_t samples;
  97     QLIST_HEAD (sw_in_listhead, SWVoiceIn) sw_head;
  98     struct audio_pcm_ops *pcm_ops;
  99     QLIST_ENTRY (HWVoiceIn) entries;
 100 } HWVoiceIn;
 101
 102 struct SWVoiceOut {
 103     QEMUSoundCard *card;
 104     AudioState *s;
 105     struct audio_pcm_info info;
 106     t_sample *conv;
 107     int64_t ratio;
 108     struct st_sample *buf;
 109     void *rate;
 110     size_t total_hw_samples_mixed;
 111     int active;
 112     int empty;
 113     HWVoiceOut *hw;
 114     char *name;
 115     struct mixeng_volume vol;
 116     struct audio_callback callback;
 117     QLIST_ENTRY (SWVoiceOut) entries;
 118 };
 119
 120 struct SWVoiceIn {
 121     QEMUSoundCard *card;
 122     AudioState *s;
 123     int active;
 124     struct audio_pcm_info info;
 125     int64_t ratio;
 126     void *rate;
 127     size_t total_hw_samples_acquired;
 128     struct st_sample *buf;
 129     f_sample *clip;
 130     HWVoiceIn *hw;
 131     char *name;
 132     struct mixeng_volume vol;
 133     struct audio_callback callback;
 134     QLIST_ENTRY (SWVoiceIn) entries;
 135 };
 136
 137 typedef struct audio_driver audio_driver;
 138 struct audio_driver {
 139     const char *name;
 140     const char *descr;
 141     void *(*init) (Audiodev *);
 142     void (*fini) (void *);
 143     struct audio_pcm_ops *pcm_ops;
 144     int can_be_default;
 145     int max_voices_out;
 146     int max_voices_in;
 147     int voice_size_out;
 148     int voice_size_in;
 149     QLIST_ENTRY(audio_driver) next;
 150 };
 151
 152 struct audio_pcm_ops {
 153     int    (*init_out)(HWVoiceOut *hw, audsettings *as, void *drv_opaque);
 154     void   (*fini_out)(HWVoiceOut *hw);
 155     size_t (*write)   (HWVoiceOut *hw, void *buf, size_t size);
 156     void   (*run_buffer_out)(HWVoiceOut *hw);
 157     /*
 158      * get a buffer that after later can be passed to put_buffer_out; optional
 159      * returns the buffer, and writes it's size to size (in bytes)
 160      * this is unrelated to the above buffer_size_out function
 161      */
 162     void  *(*get_buffer_out)(HWVoiceOut *hw, size_t *size);
 163     /*
 164      * put back the buffer returned by get_buffer_out; optional
 165      * buf must be equal the pointer returned by get_buffer_out,
 166      * size may be smaller
 167      */
 168     size_t (*put_buffer_out)(HWVoiceOut *hw, void *buf, size_t size);
 169     void   (*enable_out)(HWVoiceOut *hw, bool enable);
 170     void   (*volume_out)(HWVoiceOut *hw, Volume *vol);
 171
 172     int    (*init_in) (HWVoiceIn *hw, audsettings *as, void *drv_opaque);
 173     void   (*fini_in) (HWVoiceIn *hw);
 174     size_t (*read)    (HWVoiceIn *hw, void *buf, size_t size);
 175     void  *(*get_buffer_in)(HWVoiceIn *hw, size_t *size);
 176     void   (*put_buffer_in)(HWVoiceIn *hw, void *buf, size_t size);
 177     void   (*enable_in)(HWVoiceIn *hw, bool enable);
 178     void   (*volume_in)(HWVoiceIn *hw, Volume *vol);
 179 };
 180
 181 void *audio_generic_get_buffer_in(HWVoiceIn *hw, size_t *size);
 182 void audio_generic_put_buffer_in(HWVoiceIn *hw, void *buf, size_t size);
 183 void audio_generic_run_buffer_out(HWVoiceOut *hw);
 184 void *audio_generic_get_buffer_out(HWVoiceOut *hw, size_t *size);
 185 size_t audio_generic_put_buffer_out(HWVoiceOut *hw, void *buf, size_t size);
 186 size_t audio_generic_write(HWVoiceOut *hw, void *buf, size_t size);
 187 size_t audio_generic_read(HWVoiceIn *hw, void *buf, size_t size);
 188
 189 struct capture_callback {
 190     struct audio_capture_ops ops;
 191     void *opaque;
 192     QLIST_ENTRY (capture_callback) entries;
 193 };
 194
 195 struct CaptureVoiceOut {
 196     HWVoiceOut hw;
 197     void *buf;
 198     QLIST_HEAD (cb_listhead, capture_callback) cb_head;
 199     QLIST_ENTRY (CaptureVoiceOut) entries;
 200 };
 201
 202 struct SWVoiceCap {
 203     SWVoiceOut sw;
 204     CaptureVoiceOut *cap;
 205     QLIST_ENTRY (SWVoiceCap) entries;
 206 };
 207
 208 typedef struct AudioState {
 209     struct audio_driver *drv;
 210     Audiodev *dev;
 211     void *drv_opaque;
 212
 213     QEMUTimer *ts;
 214     QLIST_HEAD (card_listhead, QEMUSoundCard) card_head;
 215     QLIST_HEAD (hw_in_listhead, HWVoiceIn) hw_head_in;
 216     QLIST_HEAD (hw_out_listhead, HWVoiceOut) hw_head_out;
 217     QLIST_HEAD (cap_listhead, CaptureVoiceOut) cap_head;
 218     int nb_hw_voices_out;
 219     int nb_hw_voices_in;
 220     int vm_running;
 221     int64_t period_ticks;
 222
 223     bool timer_running;
 224     uint64_t timer_last;
 225
 226     QTAILQ_ENTRY(AudioState) list;
 227 } AudioState;
 228
 229 extern const struct mixeng_volume nominal_volume;
 230
 231 extern const char *audio_prio_list[];
 232
 233 void audio_driver_register(audio_driver *drv);
 234 audio_driver *audio_driver_lookup(const char *name);
 235
 236 void audio_pcm_init_info (struct audio_pcm_info *info, struct audsettings *as);
 237 void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len);
 238
 239 int audio_bug (const char *funcname, int cond);
 240 void *audio_calloc (const char *funcname, int nmemb, size_t size);
 241
 242 void audio_run(AudioState *s, const char *msg);
 243
 244 typedef struct RateCtl {
 245     int64_t start_ticks;
 246     int64_t bytes_sent;
 247 } RateCtl;
 248
 249 void audio_rate_start(RateCtl *rate);
 250 size_t audio_rate_get_bytes(struct audio_pcm_info *info, RateCtl *rate,
 251                             size_t bytes_avail);
 252
 253 static inline size_t audio_ring_dist(size_t dst, size_t src, size_t len)
 254 {
 255     return (dst >= src) ? (dst - src) : (len - src + dst);
 256 }
 257
 258 #define dolog(fmt, ...) AUD_log(AUDIO_CAP, fmt, ## __VA_ARGS__)
 259
 260 #ifdef DEBUG
 261 #define ldebug(fmt, ...) AUD_log(AUDIO_CAP, fmt, ## __VA_ARGS__)
 262 #else
 263 #define ldebug(fmt, ...) (void)0
 264 #endif
 265
 266 #define AUDIO_STRINGIFY_(n) #n
 267 #define AUDIO_STRINGIFY(n) AUDIO_STRINGIFY_(n)
 268
 269 typedef struct AudiodevListEntry {
 270     Audiodev *dev;
 271     QSIMPLEQ_ENTRY(AudiodevListEntry) next;
 272 } AudiodevListEntry;
 273
 274 typedef QSIMPLEQ_HEAD(, AudiodevListEntry) AudiodevListHead;
 275 AudiodevListHead audio_handle_legacy_opts(void);
 276
 277 void audio_free_audiodev_list(AudiodevListHead *head);
 278
 279 void audio_create_pdos(Audiodev *dev);
 280 AudiodevPerDirectionOptions *audio_get_pdo_in(Audiodev *dev);
 281 AudiodevPerDirectionOptions *audio_get_pdo_out(Audiodev *dev);
 282
 283 #endif /* QEMU_AUDIO_INT_H */