From 1d14ffa97eacd3cb722271eaf6f093038396eac4 Mon Sep 17 00:00:00 2001 From: bellard Date: Sun, 30 Oct 2005 18:58:22 +0000 Subject: merged 15a_aqemu.patch audio patch (malc) git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1584 c046a42c-6fe2-441c-8c8c-71466251a162 --- audio/noaudio.c | 164 +++++++++++++++++++++++++++++++++++--------------------- 1 file changed, 104 insertions(+), 60 deletions(-) (limited to 'audio/noaudio.c') diff --git a/audio/noaudio.c b/audio/noaudio.c index a192885a72..e7936cc7b9 100644 --- a/audio/noaudio.c +++ b/audio/noaudio.c @@ -1,8 +1,8 @@ /* - * QEMU NULL audio output driver - * - * Copyright (c) 2004 Vassili Karpov (malc) - * + * QEMU Timer based audio emulation + * + * Copyright (c) 2004-2005 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 @@ -23,77 +23,110 @@ */ #include "vl.h" -#include "audio/audio_int.h" +#define AUDIO_CAP "noaudio" +#include "audio_int.h" -typedef struct NoVoice { - HWVoice hw; +typedef struct NoVoiceOut { + HWVoiceOut hw; int64_t old_ticks; -} NoVoice; +} NoVoiceOut; -#define dolog(...) AUD_log ("noaudio", __VA_ARGS__) -#ifdef DEBUG -#define ldebug(...) dolog (__VA_ARGS__) -#else -#define ldebug(...) -#endif +typedef struct NoVoiceIn { + HWVoiceIn hw; + int64_t old_ticks; +} NoVoiceIn; -static void no_hw_run (HWVoice *hw) +static int no_run_out (HWVoiceOut *hw) { - NoVoice *no = (NoVoice *) hw; - int rpos, live, decr, samples; - st_sample_t *src; + NoVoiceOut *no = (NoVoiceOut *) hw; + int live, decr, samples; int64_t now = qemu_get_clock (vm_clock); int64_t ticks = now - no->old_ticks; - int64_t bytes = (ticks * hw->bytes_per_second) / ticks_per_sec; + int64_t bytes = (ticks * hw->info.bytes_per_second) / ticks_per_sec; - if (bytes > INT_MAX) - samples = INT_MAX >> hw->shift; - else - samples = bytes >> hw->shift; + if (bytes > INT_MAX) { + samples = INT_MAX >> hw->info.shift; + } + else { + samples = bytes >> hw->info.shift; + } - live = pcm_hw_get_live (hw); - if (live <= 0) - return; + live = audio_pcm_hw_get_live_out (&no->hw); + if (!live) { + return 0; + } no->old_ticks = now; decr = audio_MIN (live, samples); - samples = decr; - rpos = hw->rpos; - while (samples) { - int left_till_end_samples = hw->samples - rpos; - int convert_samples = audio_MIN (samples, left_till_end_samples); + hw->rpos = (hw->rpos + decr) % hw->samples; + return decr; +} - src = advance (hw->mix_buf, rpos * sizeof (st_sample_t)); - memset (src, 0, convert_samples * sizeof (st_sample_t)); +static int no_write (SWVoiceOut *sw, void *buf, int len) +{ + return audio_pcm_sw_write (sw, buf, len); +} - rpos = (rpos + convert_samples) % hw->samples; - samples -= convert_samples; - } +static int no_init_out (HWVoiceOut *hw, int freq, + int nchannels, audfmt_e fmt) +{ + audio_pcm_init_info (&hw->info, freq, nchannels, fmt, 0); + hw->bufsize = 4096; + return 0; +} - pcm_hw_dec_live (hw, decr); - hw->rpos = rpos; +static void no_fini_out (HWVoiceOut *hw) +{ + (void) hw; } -static int no_hw_write (SWVoice *sw, void *buf, int len) +static int no_ctl_out (HWVoiceOut *hw, int cmd, ...) { - return pcm_hw_write (sw, buf, len); + (void) hw; + (void) cmd; + return 0; } -static int no_hw_init (HWVoice *hw, int freq, int nchannels, audfmt_e fmt) +static int no_init_in (HWVoiceIn *hw, int freq, + int nchannels, audfmt_e fmt) { - hw->freq = freq; - hw->nchannels = nchannels; - hw->fmt = fmt; + audio_pcm_init_info (&hw->info, freq, nchannels, fmt, 0); hw->bufsize = 4096; return 0; } -static void no_hw_fini (HWVoice *hw) +static void no_fini_in (HWVoiceIn *hw) { (void) hw; } -static int no_hw_ctl (HWVoice *hw, int cmd, ...) +static int no_run_in (HWVoiceIn *hw) +{ + NoVoiceIn *no = (NoVoiceIn *) hw; + int64_t now = qemu_get_clock (vm_clock); + int64_t ticks = now - no->old_ticks; + int64_t bytes = (ticks * hw->info.bytes_per_second) / ticks_per_sec; + int live = audio_pcm_hw_get_live_in (hw); + int dead = hw->samples - live; + int samples; + + bytes = audio_MIN (bytes, INT_MAX); + samples = bytes >> hw->info.shift; + samples = audio_MIN (samples, dead); + + return samples; +} + +static int no_read (SWVoiceIn *sw, void *buf, int size) +{ + int samples = size >> sw->info.shift; + int total = sw->hw->total_samples_captured - sw->total_hw_samples_acquired; + int to_clear = audio_MIN (samples, total); + audio_pcm_info_clear_buf (&sw->info, buf, to_clear); + return to_clear; +} + +static int no_ctl_in (HWVoiceIn *hw, int cmd, ...) { (void) hw; (void) cmd; @@ -107,22 +140,33 @@ static void *no_audio_init (void) static void no_audio_fini (void *opaque) { + (void) opaque; } -struct pcm_ops no_pcm_ops = { - no_hw_init, - no_hw_fini, - no_hw_run, - no_hw_write, - no_hw_ctl +static struct audio_pcm_ops no_pcm_ops = { + no_init_out, + no_fini_out, + no_run_out, + no_write, + no_ctl_out, + + no_init_in, + no_fini_in, + no_run_in, + no_read, + no_ctl_in }; -struct audio_output_driver no_output_driver = { - "none", - no_audio_init, - no_audio_fini, - &no_pcm_ops, - 1, - 1, - sizeof (NoVoice) +struct audio_driver no_audio_driver = { + INIT_FIELD (name = ) "none", + INIT_FIELD (descr = ) "Timer based audio emulation", + INIT_FIELD (options = ) NULL, + INIT_FIELD (init = ) no_audio_init, + INIT_FIELD (fini = ) no_audio_fini, + INIT_FIELD (pcm_ops = ) &no_pcm_ops, + INIT_FIELD (can_be_default = ) 1, + INIT_FIELD (max_voices_out = ) INT_MAX, + INIT_FIELD (max_voices_in = ) INT_MAX, + INIT_FIELD (voice_size_out = ) sizeof (NoVoiceOut), + INIT_FIELD (voice_size_in = ) sizeof (NoVoiceIn) }; -- cgit v1.2.1