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/*
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* QEMU Audio subsystem
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*
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* Copyright (c) 2003-2005 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 "vl.h" |
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#define AUDIO_CAP "audio" |
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#include "audio_int.h" |
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/* #define DEBUG_PLIVE */
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/* #define DEBUG_LIVE */
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/* #define DEBUG_OUT */
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#define SW_NAME(sw) (sw)->name ? (sw)->name : "unknown" |
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static struct audio_driver *drvtab[] = { |
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#ifdef CONFIG_OSS
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&oss_audio_driver, |
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#endif
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#ifdef CONFIG_ALSA
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&alsa_audio_driver, |
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#endif
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#ifdef CONFIG_COREAUDIO
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&coreaudio_audio_driver, |
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#endif
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#ifdef CONFIG_DSOUND
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&dsound_audio_driver, |
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#endif
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#ifdef CONFIG_FMOD
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&fmod_audio_driver, |
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#endif
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#ifdef CONFIG_SDL
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&sdl_audio_driver, |
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#endif
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&no_audio_driver, |
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&wav_audio_driver |
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}; |
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struct fixed_settings {
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int enabled;
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int nb_voices;
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int greedy;
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audsettings_t settings; |
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}; |
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static struct { |
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struct fixed_settings fixed_out;
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struct fixed_settings fixed_in;
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union {
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int hz;
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int64_t ticks; |
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} period; |
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int plive;
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int log_to_monitor;
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} conf = { |
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{ /* DAC fixed settings */
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1, /* enabled */ |
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1, /* nb_voices */ |
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1, /* greedy */ |
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{ |
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44100, /* freq */ |
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2, /* nchannels */ |
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AUD_FMT_S16 /* fmt */
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} |
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}, |
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{ /* ADC fixed settings */
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1, /* enabled */ |
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1, /* nb_voices */ |
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1, /* greedy */ |
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{ |
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44100, /* freq */ |
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2, /* nchannels */ |
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AUD_FMT_S16 /* fmt */
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} |
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}, |
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{ 0 }, /* period */ |
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0, /* plive */ |
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0 /* log_to_monitor */ |
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}; |
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static AudioState glob_audio_state;
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volume_t nominal_volume = { |
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0,
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#ifdef FLOAT_MIXENG
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1.0, |
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1.0 |
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#else
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UINT_MAX, |
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UINT_MAX |
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#endif
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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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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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#ifdef AUDIO_IS_FLAWLESS_AND_NO_CHECKS_ARE_REQURIED
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#error No its not
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#else
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int audio_bug (const char *funcname, int cond) |
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{ |
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if (cond) {
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static int shown; |
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AUD_log (NULL, "Error a bug that was just triggered in %s\n", funcname); |
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if (!shown) {
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shown = 1;
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AUD_log (NULL, "Save all your work and restart without audio\n"); |
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AUD_log (NULL, "Please send bug report to malc@pulsesoft.com\n"); |
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AUD_log (NULL, "I am sorry\n"); |
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} |
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AUD_log (NULL, "Context:\n"); |
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#if defined AUDIO_BREAKPOINT_ON_BUG
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# if defined HOST_I386
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# if defined __GNUC__
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__asm__ ("int3");
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# elif defined _MSC_VER
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_asm _emit 0xcc;
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# else
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abort (); |
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# endif
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# else
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abort (); |
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# endif
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#endif
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} |
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return cond;
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} |
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#endif
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void *audio_calloc (const char *funcname, int nmemb, size_t size) |
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{ |
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int cond;
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size_t len; |
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len = nmemb * size; |
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cond = !nmemb || !size; |
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cond |= nmemb < 0;
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cond |= len < size; |
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if (audio_bug ("audio_calloc", cond)) { |
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AUD_log (NULL, "%s passed invalid arguments to audio_calloc\n", |
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funcname); |
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AUD_log (NULL, "nmemb=%d size=%zu (len=%zu)\n", nmemb, size, len); |
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return NULL; |
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} |
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return qemu_mallocz (len);
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} |
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static char *audio_alloc_prefix (const char *s) |
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{ |
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const char qemu_prefix[] = "QEMU_"; |
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size_t len; |
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char *r;
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if (!s) {
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return NULL; |
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} |
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len = strlen (s); |
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r = qemu_malloc (len + sizeof (qemu_prefix));
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if (r) {
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size_t i; |
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char *u = r + sizeof (qemu_prefix) - 1; |
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strcpy (r, qemu_prefix); |
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strcat (r, s); |
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for (i = 0; i < len; ++i) { |
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u[i] = toupper (u[i]); |
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} |
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} |
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return r;
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} |
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const char *audio_audfmt_to_string (audfmt_e fmt) |
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{ |
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switch (fmt) {
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case AUD_FMT_U8:
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return "U8"; |
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case AUD_FMT_U16:
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return "U16"; |
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case AUD_FMT_S8:
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return "S8"; |
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case AUD_FMT_S16:
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return "S16"; |
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} |
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dolog ("Bogus audfmt %d returning S16\n", fmt);
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return "S16"; |
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} |
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audfmt_e audio_string_to_audfmt (const char *s, audfmt_e defval, int *defaultp) |
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{ |
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if (!strcasecmp (s, "u8")) { |
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*defaultp = 0;
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return AUD_FMT_U8;
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} |
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else if (!strcasecmp (s, "u16")) { |
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*defaultp = 0;
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return AUD_FMT_U16;
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} |
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else if (!strcasecmp (s, "s8")) { |
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*defaultp = 0;
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return AUD_FMT_S8;
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} |
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else if (!strcasecmp (s, "s16")) { |
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*defaultp = 0;
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return AUD_FMT_S16;
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} |
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else {
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dolog ("Bogus audio format `%s' using %s\n",
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s, audio_audfmt_to_string (defval)); |
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*defaultp = 1;
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return defval;
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} |
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} |
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static audfmt_e audio_get_conf_fmt (const char *envname, |
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audfmt_e defval, |
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int *defaultp)
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{ |
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const char *var = getenv (envname); |
266 |
if (!var) {
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*defaultp = 1;
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return defval;
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} |
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return audio_string_to_audfmt (var, defval, defaultp);
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} |
272 |
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static int audio_get_conf_int (const char *key, int defval, int *defaultp) |
274 |
{ |
275 |
int val;
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char *strval;
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strval = getenv (key); |
279 |
if (strval) {
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*defaultp = 0;
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val = atoi (strval); |
282 |
return val;
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} |
284 |
else {
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*defaultp = 1;
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return defval;
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} |
288 |
} |
289 |
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static const char *audio_get_conf_str (const char *key, |
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const char *defval, |
292 |
int *defaultp)
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{ |
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const char *val = getenv (key); |
295 |
if (!val) {
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*defaultp = 1;
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return defval;
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} |
299 |
else {
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*defaultp = 0;
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return val;
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} |
303 |
} |
304 |
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305 |
void AUD_vlog (const char *cap, const char *fmt, va_list ap) |
306 |
{ |
307 |
if (conf.log_to_monitor) {
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if (cap) {
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term_printf ("%s: ", cap);
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} |
311 |
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term_vprintf (fmt, ap); |
313 |
} |
314 |
else {
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if (cap) {
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fprintf (stderr, "%s: ", cap);
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} |
318 |
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vfprintf (stderr, fmt, ap); |
320 |
} |
321 |
} |
322 |
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323 |
void AUD_log (const char *cap, const char *fmt, ...) |
324 |
{ |
325 |
va_list ap; |
326 |
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va_start (ap, fmt); |
328 |
AUD_vlog (cap, fmt, ap); |
329 |
va_end (ap); |
330 |
} |
331 |
|
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static void audio_print_options (const char *prefix, |
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struct audio_option *opt)
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{ |
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char *uprefix;
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336 |
|
337 |
if (!prefix) {
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dolog ("No prefix specified\n");
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return;
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340 |
} |
341 |
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342 |
if (!opt) {
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dolog ("No options\n");
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344 |
return;
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} |
346 |
|
347 |
uprefix = audio_alloc_prefix (prefix); |
348 |
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for (; opt->name; opt++) {
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const char *state = "default"; |
351 |
printf (" %s_%s: ", uprefix, opt->name);
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352 |
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if (opt->overridenp && *opt->overridenp) {
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state = "current";
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} |
356 |
|
357 |
switch (opt->tag) {
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358 |
case AUD_OPT_BOOL:
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{ |
360 |
int *intp = opt->valp;
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printf ("boolean, %s = %d\n", state, *intp ? 1 : 0); |
362 |
} |
363 |
break;
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364 |
|
365 |
case AUD_OPT_INT:
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366 |
{ |
367 |
int *intp = opt->valp;
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368 |
printf ("integer, %s = %d\n", state, *intp);
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369 |
} |
370 |
break;
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371 |
|
372 |
case AUD_OPT_FMT:
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{ |
374 |
audfmt_e *fmtp = opt->valp; |
375 |
printf ( |
376 |
"format, %s = %s, (one of: U8 S8 U16 S16)\n",
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state, |
378 |
audio_audfmt_to_string (*fmtp) |
379 |
); |
380 |
} |
381 |
break;
|
382 |
|
383 |
case AUD_OPT_STR:
|
384 |
{ |
385 |
const char **strp = opt->valp; |
386 |
printf ("string, %s = %s\n",
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387 |
state, |
388 |
*strp ? *strp : "(not set)");
|
389 |
} |
390 |
break;
|
391 |
|
392 |
default:
|
393 |
printf ("???\n");
|
394 |
dolog ("Bad value tag for option %s_%s %d\n",
|
395 |
uprefix, opt->name, opt->tag); |
396 |
break;
|
397 |
} |
398 |
printf (" %s\n", opt->descr);
|
399 |
} |
400 |
|
401 |
qemu_free (uprefix); |
402 |
} |
403 |
|
404 |
static void audio_process_options (const char *prefix, |
405 |
struct audio_option *opt)
|
406 |
{ |
407 |
char *optname;
|
408 |
const char qemu_prefix[] = "QEMU_"; |
409 |
size_t preflen; |
410 |
|
411 |
if (audio_bug (AUDIO_FUNC, !prefix)) {
|
412 |
dolog ("prefix = NULL\n");
|
413 |
return;
|
414 |
} |
415 |
|
416 |
if (audio_bug (AUDIO_FUNC, !opt)) {
|
417 |
dolog ("opt = NULL\n");
|
418 |
return;
|
419 |
} |
420 |
|
421 |
preflen = strlen (prefix); |
422 |
|
423 |
for (; opt->name; opt++) {
|
424 |
size_t len, i; |
425 |
int def;
|
426 |
|
427 |
if (!opt->valp) {
|
428 |
dolog ("Option value pointer for `%s' is not set\n",
|
429 |
opt->name); |
430 |
continue;
|
431 |
} |
432 |
|
433 |
len = strlen (opt->name); |
434 |
/* len of opt->name + len of prefix + size of qemu_prefix
|
435 |
* (includes trailing zero) + zero + underscore (on behalf of
|
436 |
* sizeof) */
|
437 |
optname = qemu_malloc (len + preflen + sizeof (qemu_prefix) + 1); |
438 |
if (!optname) {
|
439 |
dolog ("Could not allocate memory for option name `%s'\n",
|
440 |
opt->name); |
441 |
continue;
|
442 |
} |
443 |
|
444 |
strcpy (optname, qemu_prefix); |
445 |
|
446 |
/* copy while upper-casing, including trailing zero */
|
447 |
for (i = 0; i <= preflen; ++i) { |
448 |
optname[i + sizeof (qemu_prefix) - 1] = toupper (prefix[i]); |
449 |
} |
450 |
strcat (optname, "_");
|
451 |
strcat (optname, opt->name); |
452 |
|
453 |
def = 1;
|
454 |
switch (opt->tag) {
|
455 |
case AUD_OPT_BOOL:
|
456 |
case AUD_OPT_INT:
|
457 |
{ |
458 |
int *intp = opt->valp;
|
459 |
*intp = audio_get_conf_int (optname, *intp, &def); |
460 |
} |
461 |
break;
|
462 |
|
463 |
case AUD_OPT_FMT:
|
464 |
{ |
465 |
audfmt_e *fmtp = opt->valp; |
466 |
*fmtp = audio_get_conf_fmt (optname, *fmtp, &def); |
467 |
} |
468 |
break;
|
469 |
|
470 |
case AUD_OPT_STR:
|
471 |
{ |
472 |
const char **strp = opt->valp; |
473 |
*strp = audio_get_conf_str (optname, *strp, &def); |
474 |
} |
475 |
break;
|
476 |
|
477 |
default:
|
478 |
dolog ("Bad value tag for option `%s' - %d\n",
|
479 |
optname, opt->tag); |
480 |
break;
|
481 |
} |
482 |
|
483 |
if (!opt->overridenp) {
|
484 |
opt->overridenp = &opt->overriden; |
485 |
} |
486 |
*opt->overridenp = !def; |
487 |
qemu_free (optname); |
488 |
} |
489 |
} |
490 |
|
491 |
static void audio_print_settings (audsettings_t *as) |
492 |
{ |
493 |
dolog ("frequency=%d nchannels=%d fmt=", as->freq, as->nchannels);
|
494 |
|
495 |
switch (as->fmt) {
|
496 |
case AUD_FMT_S8:
|
497 |
AUD_log (NULL, "S8"); |
498 |
break;
|
499 |
case AUD_FMT_U8:
|
500 |
AUD_log (NULL, "U8"); |
501 |
break;
|
502 |
case AUD_FMT_S16:
|
503 |
AUD_log (NULL, "S16"); |
504 |
break;
|
505 |
case AUD_FMT_U16:
|
506 |
AUD_log (NULL, "U16"); |
507 |
break;
|
508 |
default:
|
509 |
AUD_log (NULL, "invalid(%d)", as->fmt); |
510 |
break;
|
511 |
} |
512 |
AUD_log (NULL, "\n"); |
513 |
} |
514 |
|
515 |
static int audio_validate_settigs (audsettings_t *as) |
516 |
{ |
517 |
int invalid;
|
518 |
|
519 |
invalid = as->nchannels != 1 && as->nchannels != 2; |
520 |
|
521 |
switch (as->fmt) {
|
522 |
case AUD_FMT_S8:
|
523 |
case AUD_FMT_U8:
|
524 |
case AUD_FMT_S16:
|
525 |
case AUD_FMT_U16:
|
526 |
break;
|
527 |
default:
|
528 |
invalid = 1;
|
529 |
break;
|
530 |
} |
531 |
|
532 |
invalid |= as->freq <= 0;
|
533 |
|
534 |
if (invalid) {
|
535 |
return -1; |
536 |
} |
537 |
return 0; |
538 |
} |
539 |
|
540 |
static int audio_pcm_info_eq (struct audio_pcm_info *info, audsettings_t *as) |
541 |
{ |
542 |
int bits = 8, sign = 0; |
543 |
|
544 |
switch (as->fmt) {
|
545 |
case AUD_FMT_S8:
|
546 |
sign = 1;
|
547 |
case AUD_FMT_U8:
|
548 |
break;
|
549 |
|
550 |
case AUD_FMT_S16:
|
551 |
sign = 1;
|
552 |
case AUD_FMT_U16:
|
553 |
bits = 16;
|
554 |
break;
|
555 |
} |
556 |
return info->freq == as->freq
|
557 |
&& info->nchannels == as->nchannels |
558 |
&& info->sign == sign |
559 |
&& info->bits == bits; |
560 |
} |
561 |
|
562 |
void audio_pcm_init_info (
|
563 |
struct audio_pcm_info *info,
|
564 |
audsettings_t *as, |
565 |
int swap_endian
|
566 |
) |
567 |
{ |
568 |
int bits = 8, sign = 0; |
569 |
|
570 |
switch (as->fmt) {
|
571 |
case AUD_FMT_S8:
|
572 |
sign = 1;
|
573 |
case AUD_FMT_U8:
|
574 |
break;
|
575 |
|
576 |
case AUD_FMT_S16:
|
577 |
sign = 1;
|
578 |
case AUD_FMT_U16:
|
579 |
bits = 16;
|
580 |
break;
|
581 |
} |
582 |
|
583 |
info->freq = as->freq; |
584 |
info->bits = bits; |
585 |
info->sign = sign; |
586 |
info->nchannels = as->nchannels; |
587 |
info->shift = (as->nchannels == 2) + (bits == 16); |
588 |
info->align = (1 << info->shift) - 1; |
589 |
info->bytes_per_second = info->freq << info->shift; |
590 |
info->swap_endian = swap_endian; |
591 |
} |
592 |
|
593 |
void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len) |
594 |
{ |
595 |
if (!len) {
|
596 |
return;
|
597 |
} |
598 |
|
599 |
if (info->sign) {
|
600 |
memset (buf, len << info->shift, 0x00);
|
601 |
} |
602 |
else {
|
603 |
if (info->bits == 8) { |
604 |
memset (buf, len << info->shift, 0x80);
|
605 |
} |
606 |
else {
|
607 |
int i;
|
608 |
uint16_t *p = buf; |
609 |
int shift = info->nchannels - 1; |
610 |
short s = INT16_MAX;
|
611 |
|
612 |
if (info->swap_endian) {
|
613 |
s = bswap16 (s); |
614 |
} |
615 |
|
616 |
for (i = 0; i < len << shift; i++) { |
617 |
p[i] = s; |
618 |
} |
619 |
} |
620 |
} |
621 |
} |
622 |
|
623 |
/*
|
624 |
* Hard voice (capture)
|
625 |
*/
|
626 |
static int audio_pcm_hw_find_min_in (HWVoiceIn *hw) |
627 |
{ |
628 |
SWVoiceIn *sw; |
629 |
int m = hw->total_samples_captured;
|
630 |
|
631 |
for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
|
632 |
if (sw->active) {
|
633 |
m = audio_MIN (m, sw->total_hw_samples_acquired); |
634 |
} |
635 |
} |
636 |
return m;
|
637 |
} |
638 |
|
639 |
int audio_pcm_hw_get_live_in (HWVoiceIn *hw)
|
640 |
{ |
641 |
int live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw);
|
642 |
if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) { |
643 |
dolog ("live=%d hw->samples=%d\n", live, hw->samples);
|
644 |
return 0; |
645 |
} |
646 |
return live;
|
647 |
} |
648 |
|
649 |
/*
|
650 |
* Soft voice (capture)
|
651 |
*/
|
652 |
static int audio_pcm_sw_get_rpos_in (SWVoiceIn *sw) |
653 |
{ |
654 |
HWVoiceIn *hw = sw->hw; |
655 |
int live = hw->total_samples_captured - sw->total_hw_samples_acquired;
|
656 |
int rpos;
|
657 |
|
658 |
if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) { |
659 |
dolog ("live=%d hw->samples=%d\n", live, hw->samples);
|
660 |
return 0; |
661 |
} |
662 |
|
663 |
rpos = hw->wpos - live; |
664 |
if (rpos >= 0) { |
665 |
return rpos;
|
666 |
} |
667 |
else {
|
668 |
return hw->samples + rpos;
|
669 |
} |
670 |
} |
671 |
|
672 |
int audio_pcm_sw_read (SWVoiceIn *sw, void *buf, int size) |
673 |
{ |
674 |
HWVoiceIn *hw = sw->hw; |
675 |
int samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0; |
676 |
st_sample_t *src, *dst = sw->buf; |
677 |
|
678 |
rpos = audio_pcm_sw_get_rpos_in (sw) % hw->samples; |
679 |
|
680 |
live = hw->total_samples_captured - sw->total_hw_samples_acquired; |
681 |
if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) { |
682 |
dolog ("live_in=%d hw->samples=%d\n", live, hw->samples);
|
683 |
return 0; |
684 |
} |
685 |
|
686 |
samples = size >> sw->info.shift; |
687 |
if (!live) {
|
688 |
return 0; |
689 |
} |
690 |
|
691 |
swlim = (live * sw->ratio) >> 32;
|
692 |
swlim = audio_MIN (swlim, samples); |
693 |
|
694 |
while (swlim) {
|
695 |
src = hw->conv_buf + rpos; |
696 |
isamp = hw->wpos - rpos; |
697 |
/* XXX: <= ? */
|
698 |
if (isamp <= 0) { |
699 |
isamp = hw->samples - rpos; |
700 |
} |
701 |
|
702 |
if (!isamp) {
|
703 |
break;
|
704 |
} |
705 |
osamp = swlim; |
706 |
|
707 |
if (audio_bug (AUDIO_FUNC, osamp < 0)) { |
708 |
dolog ("osamp=%d\n", osamp);
|
709 |
return 0; |
710 |
} |
711 |
|
712 |
st_rate_flow (sw->rate, src, dst, &isamp, &osamp); |
713 |
swlim -= osamp; |
714 |
rpos = (rpos + isamp) % hw->samples; |
715 |
dst += osamp; |
716 |
ret += osamp; |
717 |
total += isamp; |
718 |
} |
719 |
|
720 |
sw->clip (buf, sw->buf, ret); |
721 |
sw->total_hw_samples_acquired += total; |
722 |
return ret << sw->info.shift;
|
723 |
} |
724 |
|
725 |
/*
|
726 |
* Hard voice (playback)
|
727 |
*/
|
728 |
static int audio_pcm_hw_find_min_out (HWVoiceOut *hw, int *nb_livep) |
729 |
{ |
730 |
SWVoiceOut *sw; |
731 |
int m = INT_MAX;
|
732 |
int nb_live = 0; |
733 |
|
734 |
for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
|
735 |
if (sw->active || !sw->empty) {
|
736 |
m = audio_MIN (m, sw->total_hw_samples_mixed); |
737 |
nb_live += 1;
|
738 |
} |
739 |
} |
740 |
|
741 |
*nb_livep = nb_live; |
742 |
return m;
|
743 |
} |
744 |
|
745 |
int audio_pcm_hw_get_live_out2 (HWVoiceOut *hw, int *nb_live) |
746 |
{ |
747 |
int smin;
|
748 |
|
749 |
smin = audio_pcm_hw_find_min_out (hw, nb_live); |
750 |
|
751 |
if (!*nb_live) {
|
752 |
return 0; |
753 |
} |
754 |
else {
|
755 |
int live = smin;
|
756 |
|
757 |
if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) { |
758 |
dolog ("live=%d hw->samples=%d\n", live, hw->samples);
|
759 |
return 0; |
760 |
} |
761 |
return live;
|
762 |
} |
763 |
} |
764 |
|
765 |
int audio_pcm_hw_get_live_out (HWVoiceOut *hw)
|
766 |
{ |
767 |
int nb_live;
|
768 |
int live;
|
769 |
|
770 |
live = audio_pcm_hw_get_live_out2 (hw, &nb_live); |
771 |
if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) { |
772 |
dolog ("live=%d hw->samples=%d\n", live, hw->samples);
|
773 |
return 0; |
774 |
} |
775 |
return live;
|
776 |
} |
777 |
|
778 |
/*
|
779 |
* Soft voice (playback)
|
780 |
*/
|
781 |
int audio_pcm_sw_write (SWVoiceOut *sw, void *buf, int size) |
782 |
{ |
783 |
int hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck;
|
784 |
int ret = 0, pos = 0, total = 0; |
785 |
|
786 |
if (!sw) {
|
787 |
return size;
|
788 |
} |
789 |
|
790 |
hwsamples = sw->hw->samples; |
791 |
|
792 |
live = sw->total_hw_samples_mixed; |
793 |
if (audio_bug (AUDIO_FUNC, live < 0 || live > hwsamples)){ |
794 |
dolog ("live=%d hw->samples=%d\n", live, hwsamples);
|
795 |
return 0; |
796 |
} |
797 |
|
798 |
if (live == hwsamples) {
|
799 |
return 0; |
800 |
} |
801 |
|
802 |
wpos = (sw->hw->rpos + live) % hwsamples; |
803 |
samples = size >> sw->info.shift; |
804 |
|
805 |
dead = hwsamples - live; |
806 |
swlim = ((int64_t) dead << 32) / sw->ratio;
|
807 |
swlim = audio_MIN (swlim, samples); |
808 |
if (swlim) {
|
809 |
sw->conv (sw->buf, buf, swlim, &sw->vol); |
810 |
} |
811 |
|
812 |
while (swlim) {
|
813 |
dead = hwsamples - live; |
814 |
left = hwsamples - wpos; |
815 |
blck = audio_MIN (dead, left); |
816 |
if (!blck) {
|
817 |
break;
|
818 |
} |
819 |
isamp = swlim; |
820 |
osamp = blck; |
821 |
st_rate_flow_mix ( |
822 |
sw->rate, |
823 |
sw->buf + pos, |
824 |
sw->hw->mix_buf + wpos, |
825 |
&isamp, |
826 |
&osamp |
827 |
); |
828 |
ret += isamp; |
829 |
swlim -= isamp; |
830 |
pos += isamp; |
831 |
live += osamp; |
832 |
wpos = (wpos + osamp) % hwsamples; |
833 |
total += osamp; |
834 |
} |
835 |
|
836 |
sw->total_hw_samples_mixed += total; |
837 |
sw->empty = sw->total_hw_samples_mixed == 0;
|
838 |
|
839 |
#ifdef DEBUG_OUT
|
840 |
dolog ( |
841 |
"%s: write size %d ret %d total sw %d\n",
|
842 |
SW_NAME (sw), |
843 |
size >> sw->info.shift, |
844 |
ret, |
845 |
sw->total_hw_samples_mixed |
846 |
); |
847 |
#endif
|
848 |
|
849 |
return ret << sw->info.shift;
|
850 |
} |
851 |
|
852 |
#ifdef DEBUG_AUDIO
|
853 |
static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info) |
854 |
{ |
855 |
dolog ("%s: bits %d, sign %d, freq %d, nchan %d\n",
|
856 |
cap, info->bits, info->sign, info->freq, info->nchannels); |
857 |
} |
858 |
#endif
|
859 |
|
860 |
#define DAC
|
861 |
#include "audio_template.h" |
862 |
#undef DAC
|
863 |
#include "audio_template.h" |
864 |
|
865 |
int AUD_write (SWVoiceOut *sw, void *buf, int size) |
866 |
{ |
867 |
int bytes;
|
868 |
|
869 |
if (!sw) {
|
870 |
/* XXX: Consider options */
|
871 |
return size;
|
872 |
} |
873 |
|
874 |
if (!sw->hw->enabled) {
|
875 |
dolog ("Writing to disabled voice %s\n", SW_NAME (sw));
|
876 |
return 0; |
877 |
} |
878 |
|
879 |
bytes = sw->hw->pcm_ops->write (sw, buf, size); |
880 |
return bytes;
|
881 |
} |
882 |
|
883 |
int AUD_read (SWVoiceIn *sw, void *buf, int size) |
884 |
{ |
885 |
int bytes;
|
886 |
|
887 |
if (!sw) {
|
888 |
/* XXX: Consider options */
|
889 |
return size;
|
890 |
} |
891 |
|
892 |
if (!sw->hw->enabled) {
|
893 |
dolog ("Reading from disabled voice %s\n", SW_NAME (sw));
|
894 |
return 0; |
895 |
} |
896 |
|
897 |
bytes = sw->hw->pcm_ops->read (sw, buf, size); |
898 |
return bytes;
|
899 |
} |
900 |
|
901 |
int AUD_get_buffer_size_out (SWVoiceOut *sw)
|
902 |
{ |
903 |
return sw->hw->samples << sw->hw->info.shift;
|
904 |
} |
905 |
|
906 |
void AUD_set_active_out (SWVoiceOut *sw, int on) |
907 |
{ |
908 |
HWVoiceOut *hw; |
909 |
|
910 |
if (!sw) {
|
911 |
return;
|
912 |
} |
913 |
|
914 |
hw = sw->hw; |
915 |
if (sw->active != on) {
|
916 |
SWVoiceOut *temp_sw; |
917 |
|
918 |
if (on) {
|
919 |
int total;
|
920 |
|
921 |
hw->pending_disable = 0;
|
922 |
if (!hw->enabled) {
|
923 |
hw->enabled = 1;
|
924 |
hw->pcm_ops->ctl_out (hw, VOICE_ENABLE); |
925 |
} |
926 |
|
927 |
if (sw->empty) {
|
928 |
total = 0;
|
929 |
} |
930 |
} |
931 |
else {
|
932 |
if (hw->enabled) {
|
933 |
int nb_active = 0; |
934 |
|
935 |
for (temp_sw = hw->sw_head.lh_first; temp_sw;
|
936 |
temp_sw = temp_sw->entries.le_next) { |
937 |
nb_active += temp_sw->active != 0;
|
938 |
} |
939 |
|
940 |
hw->pending_disable = nb_active == 1;
|
941 |
} |
942 |
} |
943 |
sw->active = on; |
944 |
} |
945 |
} |
946 |
|
947 |
void AUD_set_active_in (SWVoiceIn *sw, int on) |
948 |
{ |
949 |
HWVoiceIn *hw; |
950 |
|
951 |
if (!sw) {
|
952 |
return;
|
953 |
} |
954 |
|
955 |
hw = sw->hw; |
956 |
if (sw->active != on) {
|
957 |
SWVoiceIn *temp_sw; |
958 |
|
959 |
if (on) {
|
960 |
if (!hw->enabled) {
|
961 |
hw->enabled = 1;
|
962 |
hw->pcm_ops->ctl_in (hw, VOICE_ENABLE); |
963 |
} |
964 |
sw->total_hw_samples_acquired = hw->total_samples_captured; |
965 |
} |
966 |
else {
|
967 |
if (hw->enabled) {
|
968 |
int nb_active = 0; |
969 |
|
970 |
for (temp_sw = hw->sw_head.lh_first; temp_sw;
|
971 |
temp_sw = temp_sw->entries.le_next) { |
972 |
nb_active += temp_sw->active != 0;
|
973 |
} |
974 |
|
975 |
if (nb_active == 1) { |
976 |
hw->enabled = 0;
|
977 |
hw->pcm_ops->ctl_in (hw, VOICE_DISABLE); |
978 |
} |
979 |
} |
980 |
} |
981 |
sw->active = on; |
982 |
} |
983 |
} |
984 |
|
985 |
static int audio_get_avail (SWVoiceIn *sw) |
986 |
{ |
987 |
int live;
|
988 |
|
989 |
if (!sw) {
|
990 |
return 0; |
991 |
} |
992 |
|
993 |
live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired; |
994 |
if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) { |
995 |
dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
|
996 |
return 0; |
997 |
} |
998 |
|
999 |
ldebug ( |
1000 |
"%s: get_avail live %d ret %lld\n",
|
1001 |
SW_NAME (sw), |
1002 |
live, (((int64_t) live << 32) / sw->ratio) << sw->info.shift
|
1003 |
); |
1004 |
|
1005 |
return (((int64_t) live << 32) / sw->ratio) << sw->info.shift; |
1006 |
} |
1007 |
|
1008 |
static int audio_get_free (SWVoiceOut *sw) |
1009 |
{ |
1010 |
int live, dead;
|
1011 |
|
1012 |
if (!sw) {
|
1013 |
return 0; |
1014 |
} |
1015 |
|
1016 |
live = sw->total_hw_samples_mixed; |
1017 |
|
1018 |
if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) { |
1019 |
dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
|
1020 |
return 0; |
1021 |
} |
1022 |
|
1023 |
dead = sw->hw->samples - live; |
1024 |
|
1025 |
#ifdef DEBUG_OUT
|
1026 |
dolog ("%s: get_free live %d dead %d ret %lld\n",
|
1027 |
SW_NAME (sw), |
1028 |
live, dead, (((int64_t) dead << 32) / sw->ratio) << sw->info.shift);
|
1029 |
#endif
|
1030 |
|
1031 |
return (((int64_t) dead << 32) / sw->ratio) << sw->info.shift; |
1032 |
} |
1033 |
|
1034 |
static void audio_run_out (AudioState *s) |
1035 |
{ |
1036 |
HWVoiceOut *hw = NULL;
|
1037 |
SWVoiceOut *sw; |
1038 |
|
1039 |
while ((hw = audio_pcm_hw_find_any_enabled_out (s, hw))) {
|
1040 |
int played;
|
1041 |
int live, free, nb_live, cleanup_required;
|
1042 |
|
1043 |
live = audio_pcm_hw_get_live_out2 (hw, &nb_live); |
1044 |
if (!nb_live) {
|
1045 |
live = 0;
|
1046 |
} |
1047 |
|
1048 |
if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) { |
1049 |
dolog ("live=%d hw->samples=%d\n", live, hw->samples);
|
1050 |
continue;
|
1051 |
} |
1052 |
|
1053 |
if (hw->pending_disable && !nb_live) {
|
1054 |
#ifdef DEBUG_OUT
|
1055 |
dolog ("Disabling voice\n");
|
1056 |
#endif
|
1057 |
hw->enabled = 0;
|
1058 |
hw->pending_disable = 0;
|
1059 |
hw->pcm_ops->ctl_out (hw, VOICE_DISABLE); |
1060 |
continue;
|
1061 |
} |
1062 |
|
1063 |
if (!live) {
|
1064 |
for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
|
1065 |
if (sw->active) {
|
1066 |
free = audio_get_free (sw); |
1067 |
if (free > 0) { |
1068 |
sw->callback.fn (sw->callback.opaque, free); |
1069 |
} |
1070 |
} |
1071 |
} |
1072 |
continue;
|
1073 |
} |
1074 |
|
1075 |
played = hw->pcm_ops->run_out (hw); |
1076 |
if (audio_bug (AUDIO_FUNC, hw->rpos >= hw->samples)) {
|
1077 |
dolog ("hw->rpos=%d hw->samples=%d played=%d\n",
|
1078 |
hw->rpos, hw->samples, played); |
1079 |
hw->rpos = 0;
|
1080 |
} |
1081 |
|
1082 |
#ifdef DEBUG_OUT
|
1083 |
dolog ("played=%d\n", played);
|
1084 |
#endif
|
1085 |
|
1086 |
if (played) {
|
1087 |
hw->ts_helper += played; |
1088 |
} |
1089 |
|
1090 |
cleanup_required = 0;
|
1091 |
for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
|
1092 |
if (!sw->active && sw->empty) {
|
1093 |
continue;
|
1094 |
} |
1095 |
|
1096 |
if (audio_bug (AUDIO_FUNC, played > sw->total_hw_samples_mixed)) {
|
1097 |
dolog ("played=%d sw->total_hw_samples_mixed=%d\n",
|
1098 |
played, sw->total_hw_samples_mixed); |
1099 |
played = sw->total_hw_samples_mixed; |
1100 |
} |
1101 |
|
1102 |
sw->total_hw_samples_mixed -= played; |
1103 |
|
1104 |
if (!sw->total_hw_samples_mixed) {
|
1105 |
sw->empty = 1;
|
1106 |
cleanup_required |= !sw->active && !sw->callback.fn; |
1107 |
} |
1108 |
|
1109 |
if (sw->active) {
|
1110 |
free = audio_get_free (sw); |
1111 |
if (free > 0) { |
1112 |
sw->callback.fn (sw->callback.opaque, free); |
1113 |
} |
1114 |
} |
1115 |
} |
1116 |
|
1117 |
if (cleanup_required) {
|
1118 |
restart:
|
1119 |
for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
|
1120 |
if (!sw->active && !sw->callback.fn) {
|
1121 |
#ifdef DEBUG_PLIVE
|
1122 |
dolog ("Finishing with old voice\n");
|
1123 |
#endif
|
1124 |
audio_close_out (s, sw); |
1125 |
goto restart; /* play it safe */ |
1126 |
} |
1127 |
} |
1128 |
} |
1129 |
} |
1130 |
} |
1131 |
|
1132 |
static void audio_run_in (AudioState *s) |
1133 |
{ |
1134 |
HWVoiceIn *hw = NULL;
|
1135 |
|
1136 |
while ((hw = audio_pcm_hw_find_any_enabled_in (s, hw))) {
|
1137 |
SWVoiceIn *sw; |
1138 |
int captured, min;
|
1139 |
|
1140 |
captured = hw->pcm_ops->run_in (hw); |
1141 |
|
1142 |
min = audio_pcm_hw_find_min_in (hw); |
1143 |
hw->total_samples_captured += captured - min; |
1144 |
hw->ts_helper += captured; |
1145 |
|
1146 |
for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
|
1147 |
sw->total_hw_samples_acquired -= min; |
1148 |
|
1149 |
if (sw->active) {
|
1150 |
int avail;
|
1151 |
|
1152 |
avail = audio_get_avail (sw); |
1153 |
if (avail > 0) { |
1154 |
sw->callback.fn (sw->callback.opaque, avail); |
1155 |
} |
1156 |
} |
1157 |
} |
1158 |
} |
1159 |
} |
1160 |
|
1161 |
static void audio_timer (void *opaque) |
1162 |
{ |
1163 |
AudioState *s = opaque; |
1164 |
|
1165 |
audio_run_out (s); |
1166 |
audio_run_in (s); |
1167 |
|
1168 |
qemu_mod_timer (s->ts, qemu_get_clock (vm_clock) + conf.period.ticks); |
1169 |
} |
1170 |
|
1171 |
static struct audio_option audio_options[] = { |
1172 |
/* DAC */
|
1173 |
{"DAC_FIXED_SETTINGS", AUD_OPT_BOOL, &conf.fixed_out.enabled,
|
1174 |
"Use fixed settings for host DAC", NULL, 0}, |
1175 |
|
1176 |
{"DAC_FIXED_FREQ", AUD_OPT_INT, &conf.fixed_out.settings.freq,
|
1177 |
"Frequency for fixed host DAC", NULL, 0}, |
1178 |
|
1179 |
{"DAC_FIXED_FMT", AUD_OPT_FMT, &conf.fixed_out.settings.fmt,
|
1180 |
"Format for fixed host DAC", NULL, 0}, |
1181 |
|
1182 |
{"DAC_FIXED_CHANNELS", AUD_OPT_INT, &conf.fixed_out.settings.nchannels,
|
1183 |
"Number of channels for fixed DAC (1 - mono, 2 - stereo)", NULL, 0}, |
1184 |
|
1185 |
{"DAC_VOICES", AUD_OPT_INT, &conf.fixed_out.nb_voices,
|
1186 |
"Number of voices for DAC", NULL, 0}, |
1187 |
|
1188 |
/* ADC */
|
1189 |
{"ADC_FIXED_SETTINGS", AUD_OPT_BOOL, &conf.fixed_in.enabled,
|
1190 |
"Use fixed settings for host ADC", NULL, 0}, |
1191 |
|
1192 |
{"ADC_FIXED_FREQ", AUD_OPT_INT, &conf.fixed_in.settings.freq,
|
1193 |
"Frequency for fixed host ADC", NULL, 0}, |
1194 |
|
1195 |
{"ADC_FIXED_FMT", AUD_OPT_FMT, &conf.fixed_in.settings.fmt,
|
1196 |
"Format for fixed host ADC", NULL, 0}, |
1197 |
|
1198 |
{"ADC_FIXED_CHANNELS", AUD_OPT_INT, &conf.fixed_in.settings.nchannels,
|
1199 |
"Number of channels for fixed ADC (1 - mono, 2 - stereo)", NULL, 0}, |
1200 |
|
1201 |
{"ADC_VOICES", AUD_OPT_INT, &conf.fixed_in.nb_voices,
|
1202 |
"Number of voices for ADC", NULL, 0}, |
1203 |
|
1204 |
/* Misc */
|
1205 |
{"TIMER_PERIOD", AUD_OPT_INT, &conf.period.hz,
|
1206 |
"Timer period in HZ (0 - use lowest possible)", NULL, 0}, |
1207 |
|
1208 |
{"PLIVE", AUD_OPT_BOOL, &conf.plive,
|
1209 |
"(undocumented)", NULL, 0}, |
1210 |
|
1211 |
{"LOG_TO_MONITOR", AUD_OPT_BOOL, &conf.log_to_monitor,
|
1212 |
"print logging messages to montior instead of stderr", NULL, 0}, |
1213 |
|
1214 |
{NULL, 0, NULL, NULL, NULL, 0} |
1215 |
}; |
1216 |
|
1217 |
static void audio_pp_nb_voices (const char *typ, int nb) |
1218 |
{ |
1219 |
switch (nb) {
|
1220 |
case 0: |
1221 |
printf ("Does not support %s\n", typ);
|
1222 |
break;
|
1223 |
case 1: |
1224 |
printf ("One %s voice\n", typ);
|
1225 |
break;
|
1226 |
case INT_MAX:
|
1227 |
printf ("Theoretically supports many %s voices\n", typ);
|
1228 |
break;
|
1229 |
default:
|
1230 |
printf ("Theoretically supports upto %d %s voices\n", nb, typ);
|
1231 |
break;
|
1232 |
} |
1233 |
|
1234 |
} |
1235 |
|
1236 |
void AUD_help (void) |
1237 |
{ |
1238 |
size_t i; |
1239 |
|
1240 |
audio_process_options ("AUDIO", audio_options);
|
1241 |
for (i = 0; i < sizeof (drvtab) / sizeof (drvtab[0]); i++) { |
1242 |
struct audio_driver *d = drvtab[i];
|
1243 |
if (d->options) {
|
1244 |
audio_process_options (d->name, d->options); |
1245 |
} |
1246 |
} |
1247 |
|
1248 |
printf ("Audio options:\n");
|
1249 |
audio_print_options ("AUDIO", audio_options);
|
1250 |
printf ("\n");
|
1251 |
|
1252 |
printf ("Available drivers:\n");
|
1253 |
|
1254 |
for (i = 0; i < sizeof (drvtab) / sizeof (drvtab[0]); i++) { |
1255 |
struct audio_driver *d = drvtab[i];
|
1256 |
|
1257 |
printf ("Name: %s\n", d->name);
|
1258 |
printf ("Description: %s\n", d->descr);
|
1259 |
|
1260 |
audio_pp_nb_voices ("playback", d->max_voices_out);
|
1261 |
audio_pp_nb_voices ("capture", d->max_voices_in);
|
1262 |
|
1263 |
if (d->options) {
|
1264 |
printf ("Options:\n");
|
1265 |
audio_print_options (d->name, d->options); |
1266 |
} |
1267 |
else {
|
1268 |
printf ("No options\n");
|
1269 |
} |
1270 |
printf ("\n");
|
1271 |
} |
1272 |
|
1273 |
printf ( |
1274 |
"Options are settable through environment variables.\n"
|
1275 |
"Example:\n"
|
1276 |
#ifdef _WIN32
|
1277 |
" set QEMU_AUDIO_DRV=wav\n"
|
1278 |
" set QEMU_WAV_PATH=c:\\tune.wav\n"
|
1279 |
#else
|
1280 |
" export QEMU_AUDIO_DRV=wav\n"
|
1281 |
" export QEMU_WAV_PATH=$HOME/tune.wav\n"
|
1282 |
"(for csh replace export with setenv in the above)\n"
|
1283 |
#endif
|
1284 |
" qemu ...\n\n"
|
1285 |
); |
1286 |
} |
1287 |
|
1288 |
static int audio_driver_init (AudioState *s, struct audio_driver *drv) |
1289 |
{ |
1290 |
if (drv->options) {
|
1291 |
audio_process_options (drv->name, drv->options); |
1292 |
} |
1293 |
s->drv_opaque = drv->init (); |
1294 |
|
1295 |
if (s->drv_opaque) {
|
1296 |
audio_init_nb_voices_out (s, drv); |
1297 |
audio_init_nb_voices_in (s, drv); |
1298 |
s->drv = drv; |
1299 |
return 0; |
1300 |
} |
1301 |
else {
|
1302 |
dolog ("Could not init `%s' audio driver\n", drv->name);
|
1303 |
return -1; |
1304 |
} |
1305 |
} |
1306 |
|
1307 |
static void audio_vm_change_state_handler (void *opaque, int running) |
1308 |
{ |
1309 |
AudioState *s = opaque; |
1310 |
HWVoiceOut *hwo = NULL;
|
1311 |
HWVoiceIn *hwi = NULL;
|
1312 |
int op = running ? VOICE_ENABLE : VOICE_DISABLE;
|
1313 |
|
1314 |
while ((hwo = audio_pcm_hw_find_any_enabled_out (s, hwo))) {
|
1315 |
hwo->pcm_ops->ctl_out (hwo, op); |
1316 |
} |
1317 |
|
1318 |
while ((hwi = audio_pcm_hw_find_any_enabled_in (s, hwi))) {
|
1319 |
hwi->pcm_ops->ctl_in (hwi, op); |
1320 |
} |
1321 |
} |
1322 |
|
1323 |
static void audio_atexit (void) |
1324 |
{ |
1325 |
AudioState *s = &glob_audio_state; |
1326 |
HWVoiceOut *hwo = NULL;
|
1327 |
HWVoiceIn *hwi = NULL;
|
1328 |
|
1329 |
while ((hwo = audio_pcm_hw_find_any_enabled_out (s, hwo))) {
|
1330 |
hwo->pcm_ops->ctl_out (hwo, VOICE_DISABLE); |
1331 |
hwo->pcm_ops->fini_out (hwo); |
1332 |
} |
1333 |
|
1334 |
while ((hwi = audio_pcm_hw_find_any_enabled_in (s, hwi))) {
|
1335 |
hwi->pcm_ops->ctl_in (hwi, VOICE_DISABLE); |
1336 |
hwi->pcm_ops->fini_in (hwi); |
1337 |
} |
1338 |
|
1339 |
if (s->drv) {
|
1340 |
s->drv->fini (s->drv_opaque); |
1341 |
} |
1342 |
} |
1343 |
|
1344 |
static void audio_save (QEMUFile *f, void *opaque) |
1345 |
{ |
1346 |
(void) f;
|
1347 |
(void) opaque;
|
1348 |
} |
1349 |
|
1350 |
static int audio_load (QEMUFile *f, void *opaque, int version_id) |
1351 |
{ |
1352 |
(void) f;
|
1353 |
(void) opaque;
|
1354 |
|
1355 |
if (version_id != 1) { |
1356 |
return -EINVAL;
|
1357 |
} |
1358 |
|
1359 |
return 0; |
1360 |
} |
1361 |
|
1362 |
void AUD_register_card (AudioState *s, const char *name, QEMUSoundCard *card) |
1363 |
{ |
1364 |
card->audio = s; |
1365 |
card->name = qemu_strdup (name); |
1366 |
memset (&card->entries, 0, sizeof (card->entries)); |
1367 |
LIST_INSERT_HEAD (&s->card_head, card, entries); |
1368 |
} |
1369 |
|
1370 |
void AUD_remove_card (QEMUSoundCard *card)
|
1371 |
{ |
1372 |
LIST_REMOVE (card, entries); |
1373 |
card->audio = NULL;
|
1374 |
qemu_free (card->name); |
1375 |
} |
1376 |
|
1377 |
AudioState *AUD_init (void)
|
1378 |
{ |
1379 |
size_t i; |
1380 |
int done = 0; |
1381 |
const char *drvname; |
1382 |
AudioState *s = &glob_audio_state; |
1383 |
|
1384 |
LIST_INIT (&s->hw_head_out); |
1385 |
LIST_INIT (&s->hw_head_in); |
1386 |
atexit (audio_atexit); |
1387 |
|
1388 |
s->ts = qemu_new_timer (vm_clock, audio_timer, s); |
1389 |
if (!s->ts) {
|
1390 |
dolog ("Could not create audio timer\n");
|
1391 |
return NULL; |
1392 |
} |
1393 |
|
1394 |
audio_process_options ("AUDIO", audio_options);
|
1395 |
|
1396 |
s->nb_hw_voices_out = conf.fixed_out.nb_voices; |
1397 |
s->nb_hw_voices_in = conf.fixed_in.nb_voices; |
1398 |
|
1399 |
if (s->nb_hw_voices_out <= 0) { |
1400 |
dolog ("Bogus number of playback voices %d, setting to 1\n",
|
1401 |
s->nb_hw_voices_out); |
1402 |
s->nb_hw_voices_out = 1;
|
1403 |
} |
1404 |
|
1405 |
if (s->nb_hw_voices_in <= 0) { |
1406 |
dolog ("Bogus number of capture voices %d, setting to 0\n",
|
1407 |
s->nb_hw_voices_in); |
1408 |
s->nb_hw_voices_in = 0;
|
1409 |
} |
1410 |
|
1411 |
{ |
1412 |
int def;
|
1413 |
drvname = audio_get_conf_str ("QEMU_AUDIO_DRV", NULL, &def); |
1414 |
} |
1415 |
|
1416 |
if (drvname) {
|
1417 |
int found = 0; |
1418 |
|
1419 |
for (i = 0; i < sizeof (drvtab) / sizeof (drvtab[0]); i++) { |
1420 |
if (!strcmp (drvname, drvtab[i]->name)) {
|
1421 |
done = !audio_driver_init (s, drvtab[i]); |
1422 |
found = 1;
|
1423 |
break;
|
1424 |
} |
1425 |
} |
1426 |
|
1427 |
if (!found) {
|
1428 |
dolog ("Unknown audio driver `%s'\n", drvname);
|
1429 |
dolog ("Run with -audio-help to list available drivers\n");
|
1430 |
} |
1431 |
} |
1432 |
|
1433 |
if (!done) {
|
1434 |
for (i = 0; !done && i < sizeof (drvtab) / sizeof (drvtab[0]); i++) { |
1435 |
if (drvtab[i]->can_be_default) {
|
1436 |
done = !audio_driver_init (s, drvtab[i]); |
1437 |
} |
1438 |
} |
1439 |
} |
1440 |
|
1441 |
if (!done) {
|
1442 |
done = !audio_driver_init (s, &no_audio_driver); |
1443 |
if (!done) {
|
1444 |
dolog ("Could not initialize audio subsystem\n");
|
1445 |
} |
1446 |
else {
|
1447 |
dolog ("warning: Using timer based audio emulation\n");
|
1448 |
} |
1449 |
} |
1450 |
|
1451 |
if (done) {
|
1452 |
VMChangeStateEntry *e; |
1453 |
|
1454 |
if (conf.period.hz <= 0) { |
1455 |
if (conf.period.hz < 0) { |
1456 |
dolog ("warning: Timer period is negative - %d "
|
1457 |
"treating as zero\n",
|
1458 |
conf.period.hz); |
1459 |
} |
1460 |
conf.period.ticks = 1;
|
1461 |
} |
1462 |
else {
|
1463 |
conf.period.ticks = ticks_per_sec / conf.period.hz; |
1464 |
} |
1465 |
|
1466 |
e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s); |
1467 |
if (!e) {
|
1468 |
dolog ("warning: Could not register change state handler\n"
|
1469 |
"(Audio can continue looping even after stopping the VM)\n");
|
1470 |
} |
1471 |
} |
1472 |
else {
|
1473 |
qemu_del_timer (s->ts); |
1474 |
return NULL; |
1475 |
} |
1476 |
|
1477 |
LIST_INIT (&s->card_head); |
1478 |
register_savevm ("audio", 0, 1, audio_save, audio_load, s); |
1479 |
qemu_mod_timer (s->ts, qemu_get_clock (vm_clock) + conf.period.ticks); |
1480 |
return s;
|
1481 |
} |