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/*
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|---|---|
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* QEMU Audio subsystem
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*
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* Copyright (c) 2003-2004 Vassili Karpov (malc)
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
|
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <assert.h> |
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#include "vl.h" |
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#define USE_SDL_AUDIO
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#define USE_WAV_AUDIO
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#include "audio/audio_int.h" |
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#define dolog(...) AUD_log ("audio", __VA_ARGS__) |
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#ifdef DEBUG
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#define ldebug(...) dolog (__VA_ARGS__)
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#else
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#define ldebug(...)
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#endif
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#define QC_AUDIO_DRV "QEMU_AUDIO_DRV" |
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#define QC_VOICES "QEMU_VOICES" |
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#define QC_FIXED_FORMAT "QEMU_FIXED_FORMAT" |
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#define QC_FIXED_FREQ "QEMU_FIXED_FREQ" |
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|
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static HWVoice *hw_voices;
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|
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AudioState audio_state = {
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1, /* use fixed settings */ |
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44100, /* fixed frequency */ |
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2, /* fixed channels */ |
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AUD_FMT_S16, /* fixed format */
|
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1, /* number of hw voices */ |
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-1 /* voice size */ |
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}; |
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|
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/* http://www.df.lth.se/~john_e/gems/gem002d.html */
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/* http://www.multi-platforms.com/Tips/PopCount.htm */
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uint32_t popcount (uint32_t u) |
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{
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u = ((u&0x55555555) + ((u>>1)&0x55555555)); |
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u = ((u&0x33333333) + ((u>>2)&0x33333333)); |
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u = ((u&0x0f0f0f0f) + ((u>>4)&0x0f0f0f0f)); |
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u = ((u&0x00ff00ff) + ((u>>8)&0x00ff00ff)); |
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u = ( u&0x0000ffff) + (u>>16); |
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return u;
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} |
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|
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inline uint32_t lsbindex (uint32_t u)
|
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{
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return popcount ((u&-u)-1); |
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} |
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|
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int audio_get_conf_int (const char *key, int defval) |
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{
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int val = defval;
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char *strval;
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|
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strval = getenv (key); |
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if (strval) {
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val = atoi (strval); |
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} |
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return val;
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} |
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|
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const char *audio_get_conf_str (const char *key, const char *defval) |
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{
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const char *val = getenv (key); |
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if (!val)
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return defval;
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else
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return val;
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} |
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|
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void AUD_log (const char *cap, const char *fmt, ...) |
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{
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va_list ap; |
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fprintf (stderr, "%s: ", cap);
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va_start (ap, fmt); |
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vfprintf (stderr, fmt, ap); |
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va_end (ap); |
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} |
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|
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/*
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* Soft Voice
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*/
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void pcm_sw_free_resources (SWVoice *sw)
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{
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if (sw->buf) qemu_free (sw->buf);
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if (sw->rate) st_rate_stop (sw->rate);
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sw->buf = NULL;
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sw->rate = NULL;
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} |
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int pcm_sw_alloc_resources (SWVoice *sw)
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{
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sw->buf = qemu_mallocz (sw->hw->samples * sizeof (st_sample_t));
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if (!sw->buf)
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return -1; |
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sw->rate = st_rate_start (sw->freq, sw->hw->freq); |
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if (!sw->rate) {
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qemu_free (sw->buf); |
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sw->buf = NULL;
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return -1; |
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} |
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return 0; |
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} |
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|
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void pcm_sw_fini (SWVoice *sw)
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{
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pcm_sw_free_resources (sw); |
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} |
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|
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int pcm_sw_init (SWVoice *sw, HWVoice *hw, int freq, |
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int nchannels, audfmt_e fmt)
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{
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int bits = 8, sign = 0; |
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switch (fmt) {
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case AUD_FMT_S8:
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sign = 1;
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case AUD_FMT_U8:
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break;
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|
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case AUD_FMT_S16:
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sign = 1;
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case AUD_FMT_U16:
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bits = 16;
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break;
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} |
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|
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sw->hw = hw; |
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sw->freq = freq; |
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sw->fmt = fmt; |
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sw->nchannels = nchannels; |
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sw->shift = (nchannels == 2) + (bits == 16); |
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sw->align = (1 << sw->shift) - 1; |
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sw->left = 0;
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sw->pos = 0;
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sw->wpos = 0;
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sw->live = 0;
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sw->ratio = (sw->hw->freq * ((int64_t) INT_MAX)) / sw->freq; |
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sw->bytes_per_second = sw->freq << sw->shift; |
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sw->conv = mixeng_conv[nchannels == 2][sign][bits == 16]; |
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|
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pcm_sw_free_resources (sw); |
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return pcm_sw_alloc_resources (sw);
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} |
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/* Hard voice */
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void pcm_hw_free_resources (HWVoice *hw)
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{
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if (hw->mix_buf)
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qemu_free (hw->mix_buf); |
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hw->mix_buf = NULL;
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} |
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int pcm_hw_alloc_resources (HWVoice *hw)
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{
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hw->mix_buf = qemu_mallocz (hw->samples * sizeof (st_sample_t));
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if (!hw->mix_buf)
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return -1; |
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return 0; |
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} |
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|
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void pcm_hw_fini (HWVoice *hw)
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{
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if (hw->active) {
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ldebug ("pcm_hw_fini: %d %d %d\n", hw->freq, hw->nchannels, hw->fmt);
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pcm_hw_free_resources (hw); |
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hw->pcm_ops->fini (hw); |
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memset (hw, 0, audio_state.drv->voice_size);
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} |
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} |
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void pcm_hw_gc (HWVoice *hw)
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{
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if (hw->nb_voices)
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return;
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|
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pcm_hw_fini (hw); |
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} |
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int pcm_hw_get_live (HWVoice *hw)
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{
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int i, alive = 0, live = hw->samples; |
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for (i = 0; i < hw->nb_voices; i++) { |
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if (hw->pvoice[i]->live) {
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live = audio_MIN (hw->pvoice[i]->live, live); |
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alive += 1;
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} |
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} |
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|
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if (alive)
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return live;
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else
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return -1; |
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} |
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|
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int pcm_hw_get_live2 (HWVoice *hw, int *nb_active) |
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{
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int i, alive = 0, live = hw->samples; |
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*nb_active = 0;
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for (i = 0; i < hw->nb_voices; i++) { |
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if (hw->pvoice[i]->live) {
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if (hw->pvoice[i]->live < live) {
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*nb_active = hw->pvoice[i]->active != 0;
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live = hw->pvoice[i]->live; |
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} |
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alive += 1;
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} |
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} |
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|
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if (alive)
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return live;
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else
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return -1; |
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} |
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|
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void pcm_hw_dec_live (HWVoice *hw, int decr) |
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{
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int i;
|
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|
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for (i = 0; i < hw->nb_voices; i++) { |
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if (hw->pvoice[i]->live) {
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hw->pvoice[i]->live -= decr; |
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} |
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} |
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} |
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|
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void pcm_hw_clear (HWVoice *hw, void *buf, int len) |
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{
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if (!len)
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return;
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|
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switch (hw->fmt) {
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case AUD_FMT_S16:
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case AUD_FMT_S8:
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memset (buf, len << hw->shift, 0x00);
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break;
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|
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case AUD_FMT_U8:
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memset (buf, len << hw->shift, 0x80);
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break;
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|
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case AUD_FMT_U16:
|
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{
|
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unsigned int i; |
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uint16_t *p = buf; |
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int shift = hw->nchannels - 1; |
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|
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for (i = 0; i < len << shift; i++) { |
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p[i] = INT16_MAX; |
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} |
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} |
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break;
|
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} |
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} |
| 281 |
|
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int pcm_hw_write (SWVoice *sw, void *buf, int size) |
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{
|
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int hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck;
|
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int ret = 0, pos = 0; |
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if (!sw)
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return size;
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|
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hwsamples = sw->hw->samples; |
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samples = size >> sw->shift; |
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|
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if (!sw->live) {
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sw->wpos = sw->hw->rpos; |
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} |
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wpos = sw->wpos; |
| 296 |
live = sw->live; |
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dead = hwsamples - live; |
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swlim = (dead * ((int64_t) INT_MAX)) / sw->ratio; |
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swlim = audio_MIN (swlim, samples); |
| 300 |
|
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ldebug ("size=%d live=%d dead=%d swlim=%d wpos=%d\n",
|
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size, live, dead, swlim, wpos); |
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if (swlim)
|
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sw->conv (sw->buf, buf, swlim); |
| 305 |
|
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while (swlim) {
|
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dead = hwsamples - live; |
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left = hwsamples - wpos; |
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blck = audio_MIN (dead, left); |
| 310 |
if (!blck) {
|
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/* dolog ("swlim=%d\n", swlim); */
|
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break;
|
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} |
| 314 |
isamp = swlim; |
| 315 |
osamp = blck; |
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st_rate_flow (sw->rate, sw->buf + pos, sw->hw->mix_buf + wpos, &isamp, &osamp); |
| 317 |
ret += isamp; |
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swlim -= isamp; |
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pos += isamp; |
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live += osamp; |
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wpos = (wpos + osamp) % hwsamples; |
| 322 |
} |
| 323 |
|
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sw->wpos = wpos; |
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sw->live = live; |
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return ret << sw->shift;
|
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} |
| 328 |
|
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int pcm_hw_init (HWVoice *hw, int freq, int nchannels, audfmt_e fmt) |
| 330 |
{
|
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int sign = 0, bits = 8; |
| 332 |
|
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pcm_hw_fini (hw); |
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ldebug ("pcm_hw_init: %d %d %d\n", freq, nchannels, fmt);
|
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if (hw->pcm_ops->init (hw, freq, nchannels, fmt)) {
|
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memset (hw, 0, audio_state.drv->voice_size);
|
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return -1; |
| 338 |
} |
| 339 |
|
| 340 |
switch (hw->fmt) {
|
| 341 |
case AUD_FMT_S8:
|
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sign = 1;
|
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case AUD_FMT_U8:
|
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break;
|
| 345 |
|
| 346 |
case AUD_FMT_S16:
|
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sign = 1;
|
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case AUD_FMT_U16:
|
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bits = 16;
|
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break;
|
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} |
| 352 |
|
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hw->nb_voices = 0;
|
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hw->active = 1;
|
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hw->shift = (hw->nchannels == 2) + (bits == 16); |
| 356 |
hw->bytes_per_second = hw->freq << hw->shift; |
| 357 |
hw->align = (1 << hw->shift) - 1; |
| 358 |
hw->samples = hw->bufsize >> hw->shift; |
| 359 |
hw->clip = mixeng_clip[hw->nchannels == 2][sign][bits == 16]; |
| 360 |
if (pcm_hw_alloc_resources (hw)) {
|
| 361 |
pcm_hw_fini (hw); |
| 362 |
return -1; |
| 363 |
} |
| 364 |
return 0; |
| 365 |
} |
| 366 |
|
| 367 |
static int dist (void *hw) |
| 368 |
{
|
| 369 |
if (hw) {
|
| 370 |
return (((uint8_t *) hw - (uint8_t *) hw_voices)
|
| 371 |
/ audio_state.voice_size) + 1;
|
| 372 |
} |
| 373 |
else {
|
| 374 |
return 0; |
| 375 |
} |
| 376 |
} |
| 377 |
|
| 378 |
#define ADVANCE(hw) hw ? advance (hw, audio_state.voice_size) : hw_voices
|
| 379 |
|
| 380 |
HWVoice *pcm_hw_find_any (HWVoice *hw) |
| 381 |
{
|
| 382 |
int i = dist (hw);
|
| 383 |
for (; i < audio_state.nb_hw_voices; i++) {
|
| 384 |
hw = ADVANCE (hw); |
| 385 |
return hw;
|
| 386 |
} |
| 387 |
return NULL; |
| 388 |
} |
| 389 |
|
| 390 |
HWVoice *pcm_hw_find_any_active (HWVoice *hw) |
| 391 |
{
|
| 392 |
int i = dist (hw);
|
| 393 |
for (; i < audio_state.nb_hw_voices; i++) {
|
| 394 |
hw = ADVANCE (hw); |
| 395 |
if (hw->active)
|
| 396 |
return hw;
|
| 397 |
} |
| 398 |
return NULL; |
| 399 |
} |
| 400 |
|
| 401 |
HWVoice *pcm_hw_find_any_active_enabled (HWVoice *hw) |
| 402 |
{
|
| 403 |
int i = dist (hw);
|
| 404 |
for (; i < audio_state.nb_hw_voices; i++) {
|
| 405 |
hw = ADVANCE (hw); |
| 406 |
if (hw->active && hw->enabled)
|
| 407 |
return hw;
|
| 408 |
} |
| 409 |
return NULL; |
| 410 |
} |
| 411 |
|
| 412 |
HWVoice *pcm_hw_find_any_passive (HWVoice *hw) |
| 413 |
{
|
| 414 |
int i = dist (hw);
|
| 415 |
for (; i < audio_state.nb_hw_voices; i++) {
|
| 416 |
hw = ADVANCE (hw); |
| 417 |
if (!hw->active)
|
| 418 |
return hw;
|
| 419 |
} |
| 420 |
return NULL; |
| 421 |
} |
| 422 |
|
| 423 |
HWVoice *pcm_hw_find_specific (HWVoice *hw, int freq,
|
| 424 |
int nchannels, audfmt_e fmt)
|
| 425 |
{
|
| 426 |
while ((hw = pcm_hw_find_any_active (hw))) {
|
| 427 |
if (hw->freq == freq &&
|
| 428 |
hw->nchannels == nchannels && |
| 429 |
hw->fmt == fmt) |
| 430 |
return hw;
|
| 431 |
} |
| 432 |
return NULL; |
| 433 |
} |
| 434 |
|
| 435 |
HWVoice *pcm_hw_add (int freq, int nchannels, audfmt_e fmt) |
| 436 |
{
|
| 437 |
HWVoice *hw; |
| 438 |
|
| 439 |
if (audio_state.fixed_format) {
|
| 440 |
freq = audio_state.fixed_freq; |
| 441 |
nchannels = audio_state.fixed_channels; |
| 442 |
fmt = audio_state.fixed_fmt; |
| 443 |
} |
| 444 |
|
| 445 |
hw = pcm_hw_find_specific (NULL, freq, nchannels, fmt);
|
| 446 |
|
| 447 |
if (hw)
|
| 448 |
return hw;
|
| 449 |
|
| 450 |
hw = pcm_hw_find_any_passive (NULL);
|
| 451 |
if (hw) {
|
| 452 |
hw->pcm_ops = audio_state.drv->pcm_ops; |
| 453 |
if (!hw->pcm_ops)
|
| 454 |
return NULL; |
| 455 |
|
| 456 |
if (pcm_hw_init (hw, freq, nchannels, fmt)) {
|
| 457 |
pcm_hw_gc (hw); |
| 458 |
return NULL; |
| 459 |
} |
| 460 |
else
|
| 461 |
return hw;
|
| 462 |
} |
| 463 |
|
| 464 |
return pcm_hw_find_any (NULL); |
| 465 |
} |
| 466 |
|
| 467 |
int pcm_hw_add_sw (HWVoice *hw, SWVoice *sw)
|
| 468 |
{
|
| 469 |
SWVoice **pvoice = qemu_mallocz ((hw->nb_voices + 1) * sizeof (sw)); |
| 470 |
if (!pvoice)
|
| 471 |
return -1; |
| 472 |
|
| 473 |
memcpy (pvoice, hw->pvoice, hw->nb_voices * sizeof (sw));
|
| 474 |
qemu_free (hw->pvoice); |
| 475 |
hw->pvoice = pvoice; |
| 476 |
hw->pvoice[hw->nb_voices++] = sw; |
| 477 |
return 0; |
| 478 |
} |
| 479 |
|
| 480 |
int pcm_hw_del_sw (HWVoice *hw, SWVoice *sw)
|
| 481 |
{
|
| 482 |
int i, j;
|
| 483 |
if (hw->nb_voices > 1) { |
| 484 |
SWVoice **pvoice = qemu_mallocz ((hw->nb_voices - 1) * sizeof (sw)); |
| 485 |
|
| 486 |
if (!pvoice) {
|
| 487 |
dolog ("Can not maintain consistent state (not enough memory)\n");
|
| 488 |
return -1; |
| 489 |
} |
| 490 |
|
| 491 |
for (i = 0, j = 0; i < hw->nb_voices; i++) { |
| 492 |
if (j >= hw->nb_voices - 1) { |
| 493 |
dolog ("Can not maintain consistent state "
|
| 494 |
"(invariant violated)\n");
|
| 495 |
return -1; |
| 496 |
} |
| 497 |
if (hw->pvoice[i] != sw)
|
| 498 |
pvoice[j++] = hw->pvoice[i]; |
| 499 |
} |
| 500 |
qemu_free (hw->pvoice); |
| 501 |
hw->pvoice = pvoice; |
| 502 |
hw->nb_voices -= 1;
|
| 503 |
} |
| 504 |
else {
|
| 505 |
qemu_free (hw->pvoice); |
| 506 |
hw->pvoice = NULL;
|
| 507 |
hw->nb_voices = 0;
|
| 508 |
} |
| 509 |
return 0; |
| 510 |
} |
| 511 |
|
| 512 |
SWVoice *pcm_create_voice_pair (int freq, int nchannels, audfmt_e fmt) |
| 513 |
{
|
| 514 |
SWVoice *sw; |
| 515 |
HWVoice *hw; |
| 516 |
|
| 517 |
sw = qemu_mallocz (sizeof (*sw));
|
| 518 |
if (!sw)
|
| 519 |
goto err1;
|
| 520 |
|
| 521 |
hw = pcm_hw_add (freq, nchannels, fmt); |
| 522 |
if (!hw)
|
| 523 |
goto err2;
|
| 524 |
|
| 525 |
if (pcm_hw_add_sw (hw, sw))
|
| 526 |
goto err3;
|
| 527 |
|
| 528 |
if (pcm_sw_init (sw, hw, freq, nchannels, fmt))
|
| 529 |
goto err4;
|
| 530 |
|
| 531 |
return sw;
|
| 532 |
|
| 533 |
err4:
|
| 534 |
pcm_hw_del_sw (hw, sw); |
| 535 |
err3:
|
| 536 |
pcm_hw_gc (hw); |
| 537 |
err2:
|
| 538 |
qemu_free (sw); |
| 539 |
err1:
|
| 540 |
return NULL; |
| 541 |
} |
| 542 |
|
| 543 |
SWVoice *AUD_open (SWVoice *sw, const char *name, |
| 544 |
int freq, int nchannels, audfmt_e fmt) |
| 545 |
{
|
| 546 |
if (!audio_state.drv) {
|
| 547 |
return NULL; |
| 548 |
} |
| 549 |
|
| 550 |
if (sw && freq == sw->freq && sw->nchannels == nchannels && sw->fmt == fmt) {
|
| 551 |
return sw;
|
| 552 |
} |
| 553 |
|
| 554 |
if (sw) {
|
| 555 |
ldebug ("Different format %s %d %d %d\n",
|
| 556 |
name, |
| 557 |
sw->freq == freq, |
| 558 |
sw->nchannels == nchannels, |
| 559 |
sw->fmt == fmt); |
| 560 |
} |
| 561 |
|
| 562 |
if (nchannels != 1 && nchannels != 2) { |
| 563 |
dolog ("Bogus channel count %d for voice %s\n", nchannels, name);
|
| 564 |
return NULL; |
| 565 |
} |
| 566 |
|
| 567 |
if (!audio_state.fixed_format && sw) {
|
| 568 |
pcm_sw_fini (sw); |
| 569 |
pcm_hw_del_sw (sw->hw, sw); |
| 570 |
pcm_hw_gc (sw->hw); |
| 571 |
if (sw->name) {
|
| 572 |
qemu_free (sw->name); |
| 573 |
sw->name = NULL;
|
| 574 |
} |
| 575 |
qemu_free (sw); |
| 576 |
sw = NULL;
|
| 577 |
} |
| 578 |
|
| 579 |
if (sw) {
|
| 580 |
HWVoice *hw = sw->hw; |
| 581 |
if (!hw) {
|
| 582 |
dolog ("Internal logic error voice %s has no hardware store\n",
|
| 583 |
name); |
| 584 |
return sw;
|
| 585 |
} |
| 586 |
|
| 587 |
if (pcm_sw_init (sw, hw, freq, nchannels, fmt)) {
|
| 588 |
pcm_sw_fini (sw); |
| 589 |
pcm_hw_del_sw (hw, sw); |
| 590 |
pcm_hw_gc (hw); |
| 591 |
if (sw->name) {
|
| 592 |
qemu_free (sw->name); |
| 593 |
sw->name = NULL;
|
| 594 |
} |
| 595 |
qemu_free (sw); |
| 596 |
return NULL; |
| 597 |
} |
| 598 |
} |
| 599 |
else {
|
| 600 |
sw = pcm_create_voice_pair (freq, nchannels, fmt); |
| 601 |
if (!sw) {
|
| 602 |
dolog ("Failed to create voice %s\n", name);
|
| 603 |
return NULL; |
| 604 |
} |
| 605 |
} |
| 606 |
|
| 607 |
if (sw->name) {
|
| 608 |
qemu_free (sw->name); |
| 609 |
sw->name = NULL;
|
| 610 |
} |
| 611 |
sw->name = qemu_strdup (name); |
| 612 |
return sw;
|
| 613 |
} |
| 614 |
|
| 615 |
void AUD_close (SWVoice *sw)
|
| 616 |
{
|
| 617 |
if (!sw)
|
| 618 |
return;
|
| 619 |
|
| 620 |
pcm_sw_fini (sw); |
| 621 |
pcm_hw_del_sw (sw->hw, sw); |
| 622 |
pcm_hw_gc (sw->hw); |
| 623 |
if (sw->name) {
|
| 624 |
qemu_free (sw->name); |
| 625 |
sw->name = NULL;
|
| 626 |
} |
| 627 |
qemu_free (sw); |
| 628 |
} |
| 629 |
|
| 630 |
int AUD_write (SWVoice *sw, void *buf, int size) |
| 631 |
{
|
| 632 |
int bytes;
|
| 633 |
|
| 634 |
if (!sw->hw->enabled)
|
| 635 |
dolog ("Writing to disabled voice %s\n", sw->name);
|
| 636 |
bytes = sw->hw->pcm_ops->write (sw, buf, size); |
| 637 |
return bytes;
|
| 638 |
} |
| 639 |
|
| 640 |
void AUD_run (void) |
| 641 |
{
|
| 642 |
HWVoice *hw = NULL;
|
| 643 |
|
| 644 |
while ((hw = pcm_hw_find_any_active_enabled (hw))) {
|
| 645 |
int i;
|
| 646 |
if (hw->pending_disable && pcm_hw_get_live (hw) <= 0) { |
| 647 |
hw->enabled = 0;
|
| 648 |
hw->pcm_ops->ctl (hw, VOICE_DISABLE); |
| 649 |
for (i = 0; i < hw->nb_voices; i++) { |
| 650 |
hw->pvoice[i]->live = 0;
|
| 651 |
/* hw->pvoice[i]->old_ticks = 0; */
|
| 652 |
} |
| 653 |
continue;
|
| 654 |
} |
| 655 |
|
| 656 |
hw->pcm_ops->run (hw); |
| 657 |
assert (hw->rpos < hw->samples); |
| 658 |
for (i = 0; i < hw->nb_voices; i++) { |
| 659 |
SWVoice *sw = hw->pvoice[i]; |
| 660 |
if (!sw->active && !sw->live && sw->old_ticks) {
|
| 661 |
int64_t delta = qemu_get_clock (vm_clock) - sw->old_ticks; |
| 662 |
if (delta > audio_state.ticks_threshold) {
|
| 663 |
ldebug ("resetting old_ticks for %s\n", sw->name);
|
| 664 |
sw->old_ticks = 0;
|
| 665 |
} |
| 666 |
} |
| 667 |
} |
| 668 |
} |
| 669 |
} |
| 670 |
|
| 671 |
int AUD_get_free (SWVoice *sw)
|
| 672 |
{
|
| 673 |
int free;
|
| 674 |
|
| 675 |
if (!sw)
|
| 676 |
return 4096; |
| 677 |
|
| 678 |
free = ((sw->hw->samples - sw->live) << sw->hw->shift) * sw->ratio |
| 679 |
/ INT_MAX; |
| 680 |
|
| 681 |
free &= ~sw->hw->align; |
| 682 |
if (!free) return 0; |
| 683 |
|
| 684 |
return free;
|
| 685 |
} |
| 686 |
|
| 687 |
int AUD_get_buffer_size (SWVoice *sw)
|
| 688 |
{
|
| 689 |
return sw->hw->bufsize;
|
| 690 |
} |
| 691 |
|
| 692 |
void AUD_adjust (SWVoice *sw, int bytes) |
| 693 |
{
|
| 694 |
if (!sw)
|
| 695 |
return;
|
| 696 |
sw->old_ticks += (ticks_per_sec * (int64_t) bytes) / sw->bytes_per_second; |
| 697 |
} |
| 698 |
|
| 699 |
void AUD_reset (SWVoice *sw)
|
| 700 |
{
|
| 701 |
sw->active = 0;
|
| 702 |
sw->old_ticks = 0;
|
| 703 |
} |
| 704 |
|
| 705 |
int AUD_calc_elapsed (SWVoice *sw)
|
| 706 |
{
|
| 707 |
int64_t now, delta, bytes; |
| 708 |
int dead, swlim;
|
| 709 |
|
| 710 |
if (!sw)
|
| 711 |
return 0; |
| 712 |
|
| 713 |
now = qemu_get_clock (vm_clock); |
| 714 |
delta = now - sw->old_ticks; |
| 715 |
bytes = (delta * sw->bytes_per_second) / ticks_per_sec; |
| 716 |
if (delta < 0) { |
| 717 |
dolog ("whoops delta(<0)=%lld\n", delta);
|
| 718 |
return 0; |
| 719 |
} |
| 720 |
|
| 721 |
dead = sw->hw->samples - sw->live; |
| 722 |
swlim = ((dead * (int64_t) INT_MAX) / sw->ratio); |
| 723 |
|
| 724 |
if (bytes > swlim) {
|
| 725 |
return swlim;
|
| 726 |
} |
| 727 |
else {
|
| 728 |
return bytes;
|
| 729 |
} |
| 730 |
} |
| 731 |
|
| 732 |
void AUD_enable (SWVoice *sw, int on) |
| 733 |
{
|
| 734 |
int i;
|
| 735 |
HWVoice *hw; |
| 736 |
|
| 737 |
if (!sw)
|
| 738 |
return;
|
| 739 |
|
| 740 |
hw = sw->hw; |
| 741 |
if (on) {
|
| 742 |
if (!sw->live)
|
| 743 |
sw->wpos = sw->hw->rpos; |
| 744 |
if (!sw->old_ticks) {
|
| 745 |
sw->old_ticks = qemu_get_clock (vm_clock); |
| 746 |
} |
| 747 |
} |
| 748 |
|
| 749 |
if (sw->active != on) {
|
| 750 |
if (on) {
|
| 751 |
hw->pending_disable = 0;
|
| 752 |
if (!hw->enabled) {
|
| 753 |
hw->enabled = 1;
|
| 754 |
for (i = 0; i < hw->nb_voices; i++) { |
| 755 |
ldebug ("resetting voice\n");
|
| 756 |
sw = hw->pvoice[i]; |
| 757 |
sw->old_ticks = qemu_get_clock (vm_clock); |
| 758 |
} |
| 759 |
hw->pcm_ops->ctl (hw, VOICE_ENABLE); |
| 760 |
} |
| 761 |
} |
| 762 |
else {
|
| 763 |
if (hw->enabled && !hw->pending_disable) {
|
| 764 |
int nb_active = 0; |
| 765 |
for (i = 0; i < hw->nb_voices; i++) { |
| 766 |
nb_active += hw->pvoice[i]->active != 0;
|
| 767 |
} |
| 768 |
|
| 769 |
if (nb_active == 1) { |
| 770 |
hw->pending_disable = 1;
|
| 771 |
} |
| 772 |
} |
| 773 |
} |
| 774 |
sw->active = on; |
| 775 |
} |
| 776 |
} |
| 777 |
|
| 778 |
static struct audio_output_driver *drvtab[] = { |
| 779 |
#ifdef CONFIG_OSS
|
| 780 |
&oss_output_driver, |
| 781 |
#endif
|
| 782 |
#ifdef USE_FMOD_AUDIO
|
| 783 |
&fmod_output_driver, |
| 784 |
#endif
|
| 785 |
#ifdef CONFIG_SDL
|
| 786 |
&sdl_output_driver, |
| 787 |
#endif
|
| 788 |
&no_output_driver, |
| 789 |
#ifdef USE_WAV_AUDIO
|
| 790 |
&wav_output_driver, |
| 791 |
#endif
|
| 792 |
}; |
| 793 |
|
| 794 |
static int voice_init (struct audio_output_driver *drv) |
| 795 |
{
|
| 796 |
audio_state.opaque = drv->init (); |
| 797 |
if (audio_state.opaque) {
|
| 798 |
if (audio_state.nb_hw_voices > drv->max_voices) {
|
| 799 |
dolog ("`%s' does not support %d multiple hardware channels\n"
|
| 800 |
"Resetting to %d\n",
|
| 801 |
drv->name, audio_state.nb_hw_voices, drv->max_voices); |
| 802 |
audio_state.nb_hw_voices = drv->max_voices; |
| 803 |
} |
| 804 |
hw_voices = qemu_mallocz (audio_state.nb_hw_voices * drv->voice_size); |
| 805 |
if (hw_voices) {
|
| 806 |
audio_state.drv = drv; |
| 807 |
return 1; |
| 808 |
} |
| 809 |
else {
|
| 810 |
dolog ("Not enough memory for %d `%s' voices (each %d bytes)\n",
|
| 811 |
audio_state.nb_hw_voices, drv->name, drv->voice_size); |
| 812 |
drv->fini (audio_state.opaque); |
| 813 |
return 0; |
| 814 |
} |
| 815 |
} |
| 816 |
else {
|
| 817 |
dolog ("Could not init `%s' audio\n", drv->name);
|
| 818 |
return 0; |
| 819 |
} |
| 820 |
} |
| 821 |
|
| 822 |
static void audio_vm_stop_handler (void *opaque, int reason) |
| 823 |
{
|
| 824 |
HWVoice *hw = NULL;
|
| 825 |
|
| 826 |
while ((hw = pcm_hw_find_any (hw))) {
|
| 827 |
if (!hw->pcm_ops)
|
| 828 |
continue;
|
| 829 |
|
| 830 |
hw->pcm_ops->ctl (hw, reason ? VOICE_ENABLE : VOICE_DISABLE); |
| 831 |
} |
| 832 |
} |
| 833 |
|
| 834 |
static void audio_atexit (void) |
| 835 |
{
|
| 836 |
HWVoice *hw = NULL;
|
| 837 |
|
| 838 |
while ((hw = pcm_hw_find_any (hw))) {
|
| 839 |
if (!hw->pcm_ops)
|
| 840 |
continue;
|
| 841 |
|
| 842 |
hw->pcm_ops->ctl (hw, VOICE_DISABLE); |
| 843 |
hw->pcm_ops->fini (hw); |
| 844 |
} |
| 845 |
audio_state.drv->fini (audio_state.opaque); |
| 846 |
} |
| 847 |
|
| 848 |
static void audio_save (QEMUFile *f, void *opaque) |
| 849 |
{
|
| 850 |
} |
| 851 |
|
| 852 |
static int audio_load (QEMUFile *f, void *opaque, int version_id) |
| 853 |
{
|
| 854 |
if (version_id != 1) |
| 855 |
return -EINVAL;
|
| 856 |
|
| 857 |
return 0; |
| 858 |
} |
| 859 |
|
| 860 |
void AUD_init (void) |
| 861 |
{
|
| 862 |
int i;
|
| 863 |
int done = 0; |
| 864 |
const char *drvname; |
| 865 |
|
| 866 |
audio_state.fixed_format = |
| 867 |
!!audio_get_conf_int (QC_FIXED_FORMAT, audio_state.fixed_format); |
| 868 |
audio_state.fixed_freq = |
| 869 |
audio_get_conf_int (QC_FIXED_FREQ, audio_state.fixed_freq); |
| 870 |
audio_state.nb_hw_voices = |
| 871 |
audio_get_conf_int (QC_VOICES, audio_state.nb_hw_voices); |
| 872 |
|
| 873 |
if (audio_state.nb_hw_voices <= 0) { |
| 874 |
dolog ("Bogus number of voices %d, resetting to 1\n",
|
| 875 |
audio_state.nb_hw_voices); |
| 876 |
} |
| 877 |
|
| 878 |
drvname = audio_get_conf_str (QC_AUDIO_DRV, NULL);
|
| 879 |
if (drvname) {
|
| 880 |
int found = 0; |
| 881 |
for (i = 0; i < sizeof (drvtab) / sizeof (drvtab[0]); i++) { |
| 882 |
if (!strcmp (drvname, drvtab[i]->name)) {
|
| 883 |
done = voice_init (drvtab[i]); |
| 884 |
found = 1;
|
| 885 |
break;
|
| 886 |
} |
| 887 |
} |
| 888 |
if (!found) {
|
| 889 |
dolog ("Unknown audio driver `%s'\n", drvname);
|
| 890 |
} |
| 891 |
} |
| 892 |
|
| 893 |
qemu_add_vm_stop_handler (audio_vm_stop_handler, NULL);
|
| 894 |
atexit (audio_atexit); |
| 895 |
|
| 896 |
if (!done) {
|
| 897 |
for (i = 0; !done && i < sizeof (drvtab) / sizeof (drvtab[0]); i++) { |
| 898 |
if (drvtab[i]->can_be_default)
|
| 899 |
done = voice_init (drvtab[i]); |
| 900 |
} |
| 901 |
} |
| 902 |
|
| 903 |
audio_state.ticks_threshold = ticks_per_sec / 50;
|
| 904 |
audio_state.freq_threshold = 100;
|
| 905 |
|
| 906 |
register_savevm ("audio", 0, 1, audio_save, audio_load, NULL); |
| 907 |
if (!done) {
|
| 908 |
dolog ("Can not initialize audio subsystem\n");
|
| 909 |
voice_init (&no_output_driver); |
| 910 |
} |
| 911 |
} |