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-rw-r--r--audio/audio.h188
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+/*
+ * 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 */