diff options
Diffstat (limited to 'audio/audio.h')
| -rw-r--r-- | audio/audio.h | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/audio/audio.h b/audio/audio.h new file mode 100644 index 0000000000..926a1bac93 --- /dev/null +++ b/audio/audio.h @@ -0,0 +1,188 @@ +/* + * QEMU Audio subsystem header + * + * Copyright (c) 2003-2004 Vassili Karpov (malc) + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ +#ifndef QEMU_AUDIO_H +#define QEMU_AUDIO_H + +#include "mixeng.h" + +#define dolog(...) fprintf (stderr, AUDIO_CAP ": " __VA_ARGS__) +#ifdef DEBUG +#define ldebug(...) dolog (__VA_ARGS__) +#else +#define ldebug(...) +#endif + +typedef enum { + AUD_FMT_U8, + AUD_FMT_S8, + AUD_FMT_U16, + AUD_FMT_S16 +} audfmt_e; + +typedef struct HWVoice HWVoice; +struct audio_output_driver; + +typedef struct AudioState { + int fixed_format; + int fixed_freq; + int fixed_channels; + int fixed_fmt; + int nb_hw_voices; + int voice_size; + int64_t ticks_threshold; + int freq_threshold; + void *opaque; + struct audio_output_driver *drv; +} AudioState; + +extern AudioState audio_state; + +typedef struct SWVoice { + int freq; + audfmt_e fmt; + int nchannels; + + int shift; + int align; + + t_sample *conv; + + int left; + int pos; + int bytes_per_second; + int64_t ratio; + st_sample_t *buf; + void *rate; + + int wpos; + int live; + int active; + int64_t old_ticks; + HWVoice *hw; + char *name; +} SWVoice; + +#define VOICE_ENABLE 1 +#define VOICE_DISABLE 2 + +struct pcm_ops { + int (*init) (HWVoice *hw, int freq, int nchannels, audfmt_e fmt); + void (*fini) (HWVoice *hw); + void (*run) (HWVoice *hw); + int (*write) (SWVoice *sw, void *buf, int size); + int (*ctl) (HWVoice *hw, int cmd, ...); +}; + +struct audio_output_driver { + const char *name; + void *(*init) (void); + void (*fini) (void *); + struct pcm_ops *pcm_ops; + int can_be_default; + int max_voices; + int voice_size; +}; + +struct HWVoice { + int active; + int enabled; + int pending_disable; + int valid; + int freq; + + f_sample *clip; + audfmt_e fmt; + int nchannels; + + int align; + int shift; + + int rpos; + int bufsize; + + int bytes_per_second; + st_sample_t *mix_buf; + + int samples; + int64_t old_ticks; + int nb_voices; + struct SWVoice **pvoice; + struct pcm_ops *pcm_ops; +}; + +void audio_log (const char *fmt, ...); +void pcm_sw_free_resources (SWVoice *sw); +int pcm_sw_alloc_resources (SWVoice *sw); +void pcm_sw_fini (SWVoice *sw); +int pcm_sw_init (SWVoice *sw, HWVoice *hw, int freq, + int nchannels, audfmt_e fmt); + +void pcm_hw_clear (HWVoice *hw, void *buf, int len); +HWVoice * pcm_hw_find_any (HWVoice *hw); +HWVoice * pcm_hw_find_any_active (HWVoice *hw); +HWVoice * pcm_hw_find_any_passive (HWVoice *hw); +HWVoice * pcm_hw_find_specific (HWVoice *hw, int freq, + int nchannels, audfmt_e fmt); +HWVoice * pcm_hw_add (int freq, int nchannels, audfmt_e fmt); +int pcm_hw_add_sw (HWVoice *hw, SWVoice *sw); +int pcm_hw_del_sw (HWVoice *hw, SWVoice *sw); +SWVoice * pcm_create_voice_pair (int freq, int nchannels, audfmt_e fmt); + +void pcm_hw_free_resources (HWVoice *hw); +int pcm_hw_alloc_resources (HWVoice *hw); +void pcm_hw_fini (HWVoice *hw); +void pcm_hw_gc (HWVoice *hw); +int pcm_hw_get_live (HWVoice *hw); +int pcm_hw_get_live2 (HWVoice *hw, int *nb_active); +void pcm_hw_dec_live (HWVoice *hw, int decr); +int pcm_hw_write (SWVoice *sw, void *buf, int len); + +int audio_get_conf_int (const char *key, int defval); +const char *audio_get_conf_str (const char *key, const char *defval); + +/* Public API */ +SWVoice * AUD_open (SWVoice *sw, const char *name, int freq, + int nchannels, audfmt_e fmt); +int AUD_write (SWVoice *sw, void *pcm_buf, int size); +void AUD_adjust (SWVoice *sw, int leftover); +void AUD_reset (SWVoice *sw); +int AUD_get_free (SWVoice *sw); +int AUD_get_buffer_size (SWVoice *sw); +void AUD_run (void); +void AUD_enable (SWVoice *sw, int on); +int AUD_calc_elapsed (SWVoice *sw); + +static inline void *advance (void *p, int incr) +{ + uint8_t *d = p; + return (d + incr); +} + +uint32_t popcount (uint32_t u); +inline uint32_t lsbindex (uint32_t u); + +#define audio_MIN(a, b) ((a)>(b)?(b):(a)) +#define audio_MAX(a, b) ((a)<(b)?(b):(a)) + +#endif /* audio.h */ |