audio merge (malc)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1125 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 188 insertions, 0 deletions

diff --git a/audio/audio.h b/audio/audio.h
new file mode 100644
index 0000000..926a1ba
--- /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 */