[qemu.git] / audio / sdlaudio.c

/*
 * QEMU SDL audio driver
 *
 * Copyright (c) 2004-2005 Vassili Karpov (malc)
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include "qemu/osdep.h"
#include <SDL.h>
#include <SDL_thread.h>
#include "qemu/module.h"
#include "audio.h"

#ifndef _WIN32
#ifdef __sun__
#define _POSIX_PTHREAD_SEMANTICS 1
#elif defined(__OpenBSD__) || defined(__FreeBSD__) || defined(__DragonFly__)
#include <pthread.h>
#endif
#endif

#define AUDIO_CAP "sdl"
#include "audio_int.h"

typedef struct SDLVoiceOut {
    HWVoiceOut hw;
    int exit;
    int initialized;
    Audiodev *dev;
    SDL_AudioDeviceID devid;
} SDLVoiceOut;

typedef struct SDLVoiceIn {
    HWVoiceIn hw;
    int exit;
    int initialized;
    Audiodev *dev;
    SDL_AudioDeviceID devid;
} SDLVoiceIn;

static void GCC_FMT_ATTR (1, 2) sdl_logerr (const char *fmt, ...)
{
    va_list ap;

    va_start (ap, fmt);
    AUD_vlog (AUDIO_CAP, fmt, ap);
    va_end (ap);

    AUD_log (AUDIO_CAP, "Reason: %s\n", SDL_GetError ());
}

static int aud_to_sdlfmt (AudioFormat fmt)
{
    switch (fmt) {
    case AUDIO_FORMAT_S8:
        return AUDIO_S8;

    case AUDIO_FORMAT_U8:
        return AUDIO_U8;

    case AUDIO_FORMAT_S16:
        return AUDIO_S16LSB;

    case AUDIO_FORMAT_U16:
        return AUDIO_U16LSB;

    case AUDIO_FORMAT_S32:
        return AUDIO_S32LSB;

    /* no unsigned 32-bit support in SDL */

    case AUDIO_FORMAT_F32:
        return AUDIO_F32LSB;

    default:
        dolog ("Internal logic error: Bad audio format %d\n", fmt);
#ifdef DEBUG_AUDIO
        abort ();
#endif
        return AUDIO_U8;
    }
}

static int sdl_to_audfmt(int sdlfmt, AudioFormat *fmt, int *endianness)
{
    switch (sdlfmt) {
    case AUDIO_S8:
        *endianness = 0;
        *fmt = AUDIO_FORMAT_S8;
        break;

    case AUDIO_U8:
        *endianness = 0;
        *fmt = AUDIO_FORMAT_U8;
        break;

    case AUDIO_S16LSB:
        *endianness = 0;
        *fmt = AUDIO_FORMAT_S16;
        break;

    case AUDIO_U16LSB:
        *endianness = 0;
        *fmt = AUDIO_FORMAT_U16;
        break;

    case AUDIO_S16MSB:
        *endianness = 1;
        *fmt = AUDIO_FORMAT_S16;
        break;

    case AUDIO_U16MSB:
        *endianness = 1;
        *fmt = AUDIO_FORMAT_U16;
        break;

    case AUDIO_S32LSB:
        *endianness = 0;
        *fmt = AUDIO_FORMAT_S32;
        break;

    case AUDIO_S32MSB:
        *endianness = 1;
        *fmt = AUDIO_FORMAT_S32;
        break;

    case AUDIO_F32LSB:
        *endianness = 0;
        *fmt = AUDIO_FORMAT_F32;
        break;

    case AUDIO_F32MSB:
        *endianness = 1;
        *fmt = AUDIO_FORMAT_F32;
        break;

    default:
        dolog ("Unrecognized SDL audio format %d\n", sdlfmt);
        return -1;
    }

    return 0;
}

static SDL_AudioDeviceID sdl_open(SDL_AudioSpec *req, SDL_AudioSpec *obt,
                                  int rec)
{
    SDL_AudioDeviceID devid;
#ifndef _WIN32
    int err;
    sigset_t new, old;

    /* Make sure potential threads created by SDL don't hog signals.  */
    err = sigfillset (&new);
    if (err) {
        dolog ("sdl_open: sigfillset failed: %s\n", strerror (errno));
        return 0;
    }
    err = pthread_sigmask (SIG_BLOCK, &new, &old);
    if (err) {
        dolog ("sdl_open: pthread_sigmask failed: %s\n", strerror (err));
        return 0;
    }
#endif

    devid = SDL_OpenAudioDevice(NULL, rec, req, obt, 0);
    if (!devid) {
        sdl_logerr("SDL_OpenAudioDevice for %s failed\n",
                   rec ? "recording" : "playback");
    }

#ifndef _WIN32
    err = pthread_sigmask (SIG_SETMASK, &old, NULL);
    if (err) {
        dolog ("sdl_open: pthread_sigmask (restore) failed: %s\n",
               strerror (errno));
        /* We have failed to restore original signal mask, all bets are off,
           so exit the process */
        exit (EXIT_FAILURE);
    }
#endif
    return devid;
}

static void sdl_close_out(SDLVoiceOut *sdl)
{
    if (sdl->initialized) {
        SDL_LockAudioDevice(sdl->devid);
        sdl->exit = 1;
        SDL_UnlockAudioDevice(sdl->devid);
        SDL_PauseAudioDevice(sdl->devid, 1);
        sdl->initialized = 0;
    }
    if (sdl->devid) {
        SDL_CloseAudioDevice(sdl->devid);
        sdl->devid = 0;
    }
}

static void sdl_callback_out(void *opaque, Uint8 *buf, int len)
{
    SDLVoiceOut *sdl = opaque;
    HWVoiceOut *hw = &sdl->hw;

    if (!sdl->exit) {

        /* dolog("callback_out: len=%d avail=%zu\n", len, hw->pending_emul); */

        while (hw->pending_emul && len) {
            size_t write_len;
            ssize_t start = (ssize_t)hw->pos_emul - hw->pending_emul;
            if (start < 0) {
                start += hw->size_emul;
            }
            assert(start >= 0 && start < hw->size_emul);

            write_len = MIN(MIN(hw->pending_emul, len),
                            hw->size_emul - start);

            memcpy(buf, hw->buf_emul + start, write_len);
            hw->pending_emul -= write_len;
            len -= write_len;
            buf += write_len;
        }
    }

    /* clear remaining buffer that we couldn't fill with data */
    if (len) {
        audio_pcm_info_clear_buf(&hw->info, buf,
                                 len / hw->info.bytes_per_frame);
    }
}

static void sdl_close_in(SDLVoiceIn *sdl)
{
    if (sdl->initialized) {
        SDL_LockAudioDevice(sdl->devid);
        sdl->exit = 1;
        SDL_UnlockAudioDevice(sdl->devid);
        SDL_PauseAudioDevice(sdl->devid, 1);
        sdl->initialized = 0;
    }
    if (sdl->devid) {
        SDL_CloseAudioDevice(sdl->devid);
        sdl->devid = 0;
    }
}

static void sdl_callback_in(void *opaque, Uint8 *buf, int len)
{
    SDLVoiceIn *sdl = opaque;
    HWVoiceIn *hw = &sdl->hw;

    if (sdl->exit) {
        return;
    }

    /* dolog("callback_in: len=%d pending=%zu\n", len, hw->pending_emul); */

    while (hw->pending_emul < hw->size_emul && len) {
        size_t read_len = MIN(len, MIN(hw->size_emul - hw->pos_emul,
                                       hw->size_emul - hw->pending_emul));

        memcpy(hw->buf_emul + hw->pos_emul, buf, read_len);

        hw->pending_emul += read_len;
        hw->pos_emul = (hw->pos_emul + read_len) % hw->size_emul;
        len -= read_len;
        buf += read_len;
    }
}

#define SDL_WRAPPER_FUNC(name, ret_type, args_decl, args, dir) \
    static ret_type glue(sdl_, name)args_decl                  \
    {                                                          \
        ret_type ret;                                          \
        glue(SDLVoice, dir) *sdl = (glue(SDLVoice, dir) *)hw;  \
                                                               \
        SDL_LockAudioDevice(sdl->devid);                       \
        ret = glue(audio_generic_, name)args;                  \
        SDL_UnlockAudioDevice(sdl->devid);                     \
                                                               \
        return ret;                                            \
    }

#define SDL_WRAPPER_VOID_FUNC(name, args_decl, args, dir)      \
    static void glue(sdl_, name)args_decl                      \
    {                                                          \
        glue(SDLVoice, dir) *sdl = (glue(SDLVoice, dir) *)hw;  \
                                                               \
        SDL_LockAudioDevice(sdl->devid);                       \
        glue(audio_generic_, name)args;                        \
        SDL_UnlockAudioDevice(sdl->devid);                     \
    }

SDL_WRAPPER_FUNC(get_buffer_out, void *, (HWVoiceOut *hw, size_t *size),
                 (hw, size), Out)
SDL_WRAPPER_FUNC(put_buffer_out, size_t,
                 (HWVoiceOut *hw, void *buf, size_t size), (hw, buf, size), Out)
SDL_WRAPPER_FUNC(write, size_t,
                 (HWVoiceOut *hw, void *buf, size_t size), (hw, buf, size), Out)
SDL_WRAPPER_FUNC(read, size_t, (HWVoiceIn *hw, void *buf, size_t size),
                 (hw, buf, size), In)
SDL_WRAPPER_FUNC(get_buffer_in, void *, (HWVoiceIn *hw, size_t *size),
                 (hw, size), In)
SDL_WRAPPER_VOID_FUNC(put_buffer_in, (HWVoiceIn *hw, void *buf, size_t size),
                      (hw, buf, size), In)
#undef SDL_WRAPPER_FUNC
#undef SDL_WRAPPER_VOID_FUNC

static void sdl_fini_out(HWVoiceOut *hw)
{
    SDLVoiceOut *sdl = (SDLVoiceOut *)hw;

    sdl_close_out(sdl);
}

static int sdl_init_out(HWVoiceOut *hw, struct audsettings *as,
                        void *drv_opaque)
{
    SDLVoiceOut *sdl = (SDLVoiceOut *)hw;
    SDL_AudioSpec req, obt;
    int endianness;
    int err;
    AudioFormat effective_fmt;
    Audiodev *dev = drv_opaque;
    AudiodevSdlPerDirectionOptions *spdo = dev->u.sdl.out;
    struct audsettings obt_as;

    req.freq = as->freq;
    req.format = aud_to_sdlfmt (as->fmt);
    req.channels = as->nchannels;
    /*
     * This is wrong. SDL samples are QEMU frames. The buffer size will be
     * the requested buffer size multiplied by the number of channels.
     */
    req.samples = audio_buffer_samples(
        qapi_AudiodevSdlPerDirectionOptions_base(spdo), as, 11610);
    req.callback = sdl_callback_out;
    req.userdata = sdl;

    sdl->dev = dev;
    sdl->devid = sdl_open(&req, &obt, 0);
    if (!sdl->devid) {
        return -1;
    }

    err = sdl_to_audfmt(obt.format, &effective_fmt, &endianness);
    if (err) {
        sdl_close_out(sdl);
        return -1;
    }

    obt_as.freq = obt.freq;
    obt_as.nchannels = obt.channels;
    obt_as.fmt = effective_fmt;
    obt_as.endianness = endianness;

    audio_pcm_init_info (&hw->info, &obt_as);
    hw->samples = (spdo->has_buffer_count ? spdo->buffer_count : 4) *
        obt.samples;

    sdl->initialized = 1;
    sdl->exit = 0;
    return 0;
}

static void sdl_enable_out(HWVoiceOut *hw, bool enable)
{
    SDLVoiceOut *sdl = (SDLVoiceOut *)hw;

    SDL_PauseAudioDevice(sdl->devid, !enable);
}

static void sdl_fini_in(HWVoiceIn *hw)
{
    SDLVoiceIn *sdl = (SDLVoiceIn *)hw;

    sdl_close_in(sdl);
}

static int sdl_init_in(HWVoiceIn *hw, audsettings *as, void *drv_opaque)
{
    SDLVoiceIn *sdl = (SDLVoiceIn *)hw;
    SDL_AudioSpec req, obt;
    int endianness;
    int err;
    AudioFormat effective_fmt;
    Audiodev *dev = drv_opaque;
    AudiodevSdlPerDirectionOptions *spdo = dev->u.sdl.in;
    struct audsettings obt_as;

    req.freq = as->freq;
    req.format = aud_to_sdlfmt(as->fmt);
    req.channels = as->nchannels;
    /* SDL samples are QEMU frames */
    req.samples = audio_buffer_frames(
        qapi_AudiodevSdlPerDirectionOptions_base(spdo), as, 11610);
    req.callback = sdl_callback_in;
    req.userdata = sdl;

    sdl->dev = dev;
    sdl->devid = sdl_open(&req, &obt, 1);
    if (!sdl->devid) {
        return -1;
    }

    err = sdl_to_audfmt(obt.format, &effective_fmt, &endianness);
    if (err) {
        sdl_close_in(sdl);
        return -1;
    }

    obt_as.freq = obt.freq;
    obt_as.nchannels = obt.channels;
    obt_as.fmt = effective_fmt;
    obt_as.endianness = endianness;

    audio_pcm_init_info(&hw->info, &obt_as);
    hw->samples = (spdo->has_buffer_count ? spdo->buffer_count : 4) *
        obt.samples;
    hw->size_emul = hw->samples * hw->info.bytes_per_frame;
    hw->buf_emul = g_malloc(hw->size_emul);
    hw->pos_emul = hw->pending_emul = 0;

    sdl->initialized = 1;
    sdl->exit = 0;
    return 0;
}

static void sdl_enable_in(HWVoiceIn *hw, bool enable)
{
    SDLVoiceIn *sdl = (SDLVoiceIn *)hw;

    SDL_PauseAudioDevice(sdl->devid, !enable);
}

static void *sdl_audio_init(Audiodev *dev)
{
    if (SDL_InitSubSystem (SDL_INIT_AUDIO)) {
        sdl_logerr ("SDL failed to initialize audio subsystem\n");
        return NULL;
    }

    return dev;
}

static void sdl_audio_fini (void *opaque)
{
    SDL_QuitSubSystem (SDL_INIT_AUDIO);
}

static struct audio_pcm_ops sdl_pcm_ops = {
    .init_out = sdl_init_out,
    .fini_out = sdl_fini_out,
  /* wrapper for audio_generic_write */
    .write    = sdl_write,
  /* wrapper for audio_generic_get_buffer_out */
    .get_buffer_out = sdl_get_buffer_out,
  /* wrapper for audio_generic_put_buffer_out */
    .put_buffer_out = sdl_put_buffer_out,
    .enable_out = sdl_enable_out,
    .init_in = sdl_init_in,
    .fini_in = sdl_fini_in,
  /* wrapper for audio_generic_read */
    .read = sdl_read,
  /* wrapper for audio_generic_get_buffer_in */
    .get_buffer_in = sdl_get_buffer_in,
  /* wrapper for audio_generic_put_buffer_in */
    .put_buffer_in = sdl_put_buffer_in,
    .enable_in = sdl_enable_in,
};

static struct audio_driver sdl_audio_driver = {
    .name           = "sdl",
    .descr          = "SDL http://www.libsdl.org",
    .init           = sdl_audio_init,
    .fini           = sdl_audio_fini,
    .pcm_ops        = &sdl_pcm_ops,
    .can_be_default = 1,
    .max_voices_out = INT_MAX,
    .max_voices_in  = INT_MAX,
    .voice_size_out = sizeof(SDLVoiceOut),
    .voice_size_in  = sizeof(SDLVoiceIn),
};

static void register_audio_sdl(void)
{
    audio_driver_register(&sdl_audio_driver);
}
type_init(register_audio_sdl);
Commit	Line	Data
85571bc7	1	/*
1d14ffa9 FB	2	* QEMU SDL audio driver
	3	*
	4	* Copyright (c) 2004-2005 Vassili Karpov (malc)
	5	*
85571bc7 FB	6	* Permission is hereby granted, free of charge, to any person obtaining a copy
	7	* of this software and associated documentation files (the "Software"), to deal
	8	* in the Software without restriction, including without limitation the rights
	9	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	10	* copies of the Software, and to permit persons to whom the Software is
	11	* furnished to do so, subject to the following conditions:
	12	*
	13	* The above copyright notice and this permission notice shall be included in
	14	* all copies or substantial portions of the Software.
	15	*
	16	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	17	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	18	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	19	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	20	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	21	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	22	* THE SOFTWARE.
	23	*/
0b8fa32f	24
6086a565	25	#include "qemu/osdep.h"
9f059eca FB	26	#include <SDL.h>
9f059eca FB	27	#include <SDL_thread.h>
0b8fa32f	28	#include "qemu/module.h"
87ecb68b	29	#include "audio.h"
85571bc7	30
e784ba70 TS	31	#ifndef _WIN32
	32	#ifdef __sun__
	33	#define _POSIX_PTHREAD_SEMANTICS 1
c5e97233	34	#elif defined(__OpenBSD__) \|\| defined(__FreeBSD__) \|\| defined(__DragonFly__)
9b4c14c3	35	#include <pthread.h>
e784ba70	36	#endif
e784ba70 TS	37	#endif
e784ba70 TS	38
1d14ffa9 FB	39	#define AUDIO_CAP "sdl"
1d14ffa9 FB	40	#include "audio_int.h"
85571bc7	41
1d14ffa9 FB	42	typedef struct SDLVoiceOut {
1d14ffa9 FB	43	HWVoiceOut hw;
85571bc7	44	int exit;
85571bc7	45	int initialized;
57dea553	46	Audiodev *dev;
ce31f099 VR	47	SDL_AudioDeviceID devid;
ce31f099 VR	48	} SDLVoiceOut;
85571bc7	49
c2031dea VR	50	typedef struct SDLVoiceIn {
	51	HWVoiceIn hw;
	52	int exit;
	53	int initialized;
	54	Audiodev *dev;
	55	SDL_AudioDeviceID devid;
	56	} SDLVoiceIn;
	57
1d14ffa9	58	static void GCC_FMT_ATTR (1, 2) sdl_logerr (const char *fmt, ...)
85571bc7	59	{
1d14ffa9 FB	60	va_list ap;
	61
	62	va_start (ap, fmt);
	63	AUD_vlog (AUDIO_CAP, fmt, ap);
	64	va_end (ap);
	65
	66	AUD_log (AUDIO_CAP, "Reason: %s\n", SDL_GetError ());
85571bc7 FB	67	}
85571bc7 FB	68
85bc5852	69	static int aud_to_sdlfmt (AudioFormat fmt)
85571bc7	70	{
85571bc7	71	switch (fmt) {
85bc5852	72	case AUDIO_FORMAT_S8:
1d14ffa9 FB	73	return AUDIO_S8;
1d14ffa9 FB	74
85bc5852	75	case AUDIO_FORMAT_U8:
1d14ffa9 FB	76	return AUDIO_U8;
1d14ffa9 FB	77
85bc5852	78	case AUDIO_FORMAT_S16:
1d14ffa9 FB	79	return AUDIO_S16LSB;
1d14ffa9 FB	80
85bc5852	81	case AUDIO_FORMAT_U16:
1d14ffa9 FB	82	return AUDIO_U16LSB;
1d14ffa9 FB	83
ed2a4a79 KZ	84	case AUDIO_FORMAT_S32:
	85	return AUDIO_S32LSB;
	86
	87	/* no unsigned 32-bit support in SDL */
	88
	89	case AUDIO_FORMAT_F32:
	90	return AUDIO_F32LSB;
	91
85571bc7	92	default:
1d14ffa9 FB	93	dolog ("Internal logic error: Bad audio format %d\n", fmt);
	94	#ifdef DEBUG_AUDIO
	95	abort ();
	96	#endif
	97	return AUDIO_U8;
85571bc7 FB	98	}
	99	}
	100
85bc5852	101	static int sdl_to_audfmt(int sdlfmt, AudioFormat fmt, int endianness)
85571bc7	102	{
1d14ffa9 FB	103	switch (sdlfmt) {
1d14ffa9 FB	104	case AUDIO_S8:
4ff9786c	105	*endianness = 0;
85bc5852	106	*fmt = AUDIO_FORMAT_S8;
1d14ffa9 FB	107	break;
	108
	109	case AUDIO_U8:
4ff9786c	110	*endianness = 0;
85bc5852	111	*fmt = AUDIO_FORMAT_U8;
1d14ffa9 FB	112	break;
	113
	114	case AUDIO_S16LSB:
4ff9786c	115	*endianness = 0;
85bc5852	116	*fmt = AUDIO_FORMAT_S16;
1d14ffa9 FB	117	break;
	118
	119	case AUDIO_U16LSB:
4ff9786c	120	*endianness = 0;
85bc5852	121	*fmt = AUDIO_FORMAT_U16;
1d14ffa9 FB	122	break;
	123
	124	case AUDIO_S16MSB:
4ff9786c	125	*endianness = 1;
85bc5852	126	*fmt = AUDIO_FORMAT_S16;
1d14ffa9 FB	127	break;
	128
	129	case AUDIO_U16MSB:
4ff9786c	130	*endianness = 1;
85bc5852	131	*fmt = AUDIO_FORMAT_U16;
1d14ffa9 FB	132	break;
1d14ffa9 FB	133
ed2a4a79 KZ	134	case AUDIO_S32LSB:
	135	*endianness = 0;
	136	*fmt = AUDIO_FORMAT_S32;
	137	break;
	138
	139	case AUDIO_S32MSB:
	140	*endianness = 1;
	141	*fmt = AUDIO_FORMAT_S32;
	142	break;
	143
	144	case AUDIO_F32LSB:
	145	*endianness = 0;
	146	*fmt = AUDIO_FORMAT_F32;
	147	break;
	148
	149	case AUDIO_F32MSB:
	150	*endianness = 1;
	151	*fmt = AUDIO_FORMAT_F32;
	152	break;
	153
85571bc7	154	default:
1d14ffa9 FB	155	dolog ("Unrecognized SDL audio format %d\n", sdlfmt);
1d14ffa9 FB	156	return -1;
85571bc7	157	}
1d14ffa9 FB	158
1d14ffa9 FB	159	return 0;
85571bc7 FB	160	}
85571bc7 FB	161
ce31f099 VR	162	static SDL_AudioDeviceID sdl_open(SDL_AudioSpec req, SDL_AudioSpec obt,
ce31f099 VR	163	int rec)
85571bc7	164	{
ce31f099	165	SDL_AudioDeviceID devid;
e784ba70	166	#ifndef _WIN32
d087bb3e	167	int err;
e784ba70 TS	168	sigset_t new, old;
	169
	170	/* Make sure potential threads created by SDL don't hog signals. */
d087bb3e	171	err = sigfillset (&new);
	172	if (err) {
	173	dolog ("sdl_open: sigfillset failed: %s\n", strerror (errno));
ce31f099	174	return 0;
d087bb3e	175	}
	176	err = pthread_sigmask (SIG_BLOCK, &new, &old);
	177	if (err) {
	178	dolog ("sdl_open: pthread_sigmask failed: %s\n", strerror (err));
ce31f099	179	return 0;
d087bb3e	180	}
e784ba70	181	#endif
85571bc7	182
ce31f099 VR	183	devid = SDL_OpenAudioDevice(NULL, rec, req, obt, 0);
	184	if (!devid) {
	185	sdl_logerr("SDL_OpenAudioDevice for %s failed\n",
	186	rec ? "recording" : "playback");
85571bc7	187	}
e784ba70 TS	188
e784ba70 TS	189	#ifndef _WIN32
d087bb3e	190	err = pthread_sigmask (SIG_SETMASK, &old, NULL);
	191	if (err) {
	192	dolog ("sdl_open: pthread_sigmask (restore) failed: %s\n",
	193	strerror (errno));
	194	/* We have failed to restore original signal mask, all bets are off,
	195	so exit the process */
	196	exit (EXIT_FAILURE);
	197	}
e784ba70	198	#endif
ce31f099	199	return devid;
85571bc7 FB	200	}
85571bc7 FB	201
ce31f099	202	static void sdl_close_out(SDLVoiceOut *sdl)
85571bc7	203	{
ce31f099 VR	204	if (sdl->initialized) {
	205	SDL_LockAudioDevice(sdl->devid);
	206	sdl->exit = 1;
	207	SDL_UnlockAudioDevice(sdl->devid);
	208	SDL_PauseAudioDevice(sdl->devid, 1);
	209	sdl->initialized = 0;
	210	}
	211	if (sdl->devid) {
	212	SDL_CloseAudioDevice(sdl->devid);
	213	sdl->devid = 0;
85571bc7 FB	214	}
	215	}
	216
ce31f099	217	static void sdl_callback_out(void opaque, Uint8 buf, int len)
85571bc7	218	{
1d14ffa9	219	SDLVoiceOut *sdl = opaque;
1d14ffa9	220	HWVoiceOut *hw = &sdl->hw;
85571bc7	221
ce31f099	222	if (!sdl->exit) {
85571bc7	223
ce31f099	224	/* dolog("callback_out: len=%d avail=%zu\n", len, hw->pending_emul); */
9399ef16	225
bcce2ea5 VR	226	while (hw->pending_emul && len) {
	227	size_t write_len;
	228	ssize_t start = (ssize_t)hw->pos_emul - hw->pending_emul;
	229	if (start < 0) {
	230	start += hw->size_emul;
	231	}
	232	assert(start >= 0 && start < hw->size_emul);
ff718767	233
bcce2ea5 VR	234	write_len = MIN(MIN(hw->pending_emul, len),
bcce2ea5 VR	235	hw->size_emul - start);
ff718767	236
bcce2ea5 VR	237	memcpy(buf, hw->buf_emul + start, write_len);
	238	hw->pending_emul -= write_len;
	239	len -= write_len;
	240	buf += write_len;
	241	}
85571bc7	242	}
9399ef16	243
ff718767 KZ	244	/* clear remaining buffer that we couldn't fill with data */
ff718767 KZ	245	if (len) {
e02d178f VR	246	audio_pcm_info_clear_buf(&hw->info, buf,
e02d178f VR	247	len / hw->info.bytes_per_frame);
bcf19777	248	}
85571bc7 FB	249	}
85571bc7 FB	250
c2031dea VR	251	static void sdl_close_in(SDLVoiceIn *sdl)
	252	{
	253	if (sdl->initialized) {
	254	SDL_LockAudioDevice(sdl->devid);
	255	sdl->exit = 1;
	256	SDL_UnlockAudioDevice(sdl->devid);
	257	SDL_PauseAudioDevice(sdl->devid, 1);
	258	sdl->initialized = 0;
	259	}
	260	if (sdl->devid) {
	261	SDL_CloseAudioDevice(sdl->devid);
	262	sdl->devid = 0;
	263	}
	264	}
	265
	266	static void sdl_callback_in(void opaque, Uint8 buf, int len)
	267	{
	268	SDLVoiceIn *sdl = opaque;
	269	HWVoiceIn *hw = &sdl->hw;
	270
	271	if (sdl->exit) {
	272	return;
	273	}
	274
	275	/* dolog("callback_in: len=%d pending=%zu\n", len, hw->pending_emul); */
	276
	277	while (hw->pending_emul < hw->size_emul && len) {
	278	size_t read_len = MIN(len, MIN(hw->size_emul - hw->pos_emul,
	279	hw->size_emul - hw->pending_emul));
	280
	281	memcpy(hw->buf_emul + hw->pos_emul, buf, read_len);
	282
	283	hw->pending_emul += read_len;
	284	hw->pos_emul = (hw->pos_emul + read_len) % hw->size_emul;
	285	len -= read_len;
	286	buf += read_len;
	287	}
	288	}
	289
ce31f099	290	#define SDL_WRAPPER_FUNC(name, ret_type, args_decl, args, dir) \
ef26632e VR	291	static ret_type glue(sdl_, name)args_decl \
	292	{ \
	293	ret_type ret; \
ce31f099	294	glue(SDLVoice, dir) sdl = (glue(SDLVoice, dir) )hw; \
ef26632e	295	\
ce31f099	296	SDL_LockAudioDevice(sdl->devid); \
ef26632e	297	ret = glue(audio_generic_, name)args; \
ce31f099	298	SDL_UnlockAudioDevice(sdl->devid); \
ef26632e VR	299	\
ef26632e VR	300	return ret; \
ff541499	301	}
ff541499	302
c2031dea VR	303	#define SDL_WRAPPER_VOID_FUNC(name, args_decl, args, dir) \
	304	static void glue(sdl_, name)args_decl \
	305	{ \
	306	glue(SDLVoice, dir) sdl = (glue(SDLVoice, dir) )hw; \
	307	\
	308	SDL_LockAudioDevice(sdl->devid); \
	309	glue(audio_generic_, name)args; \
	310	SDL_UnlockAudioDevice(sdl->devid); \
	311	}
	312
ff718767	313	SDL_WRAPPER_FUNC(get_buffer_out, void , (HWVoiceOut hw, size_t *size),
ce31f099	314	(hw, size), Out)
fdc8c5f4	315	SDL_WRAPPER_FUNC(put_buffer_out, size_t,
ce31f099	316	(HWVoiceOut hw, void buf, size_t size), (hw, buf, size), Out)
ff718767	317	SDL_WRAPPER_FUNC(write, size_t,
ce31f099	318	(HWVoiceOut hw, void buf, size_t size), (hw, buf, size), Out)
c2031dea VR	319	SDL_WRAPPER_FUNC(read, size_t, (HWVoiceIn hw, void buf, size_t size),
	320	(hw, buf, size), In)
	321	SDL_WRAPPER_FUNC(get_buffer_in, void , (HWVoiceIn hw, size_t *size),
	322	(hw, size), In)
	323	SDL_WRAPPER_VOID_FUNC(put_buffer_in, (HWVoiceIn hw, void buf, size_t size),
	324	(hw, buf, size), In)
ff718767	325	#undef SDL_WRAPPER_FUNC
c2031dea	326	#undef SDL_WRAPPER_VOID_FUNC
1d14ffa9	327
ce31f099	328	static void sdl_fini_out(HWVoiceOut *hw)
1d14ffa9	329	{
ce31f099	330	SDLVoiceOut sdl = (SDLVoiceOut )hw;
1d14ffa9	331
ce31f099	332	sdl_close_out(sdl);
85571bc7 FB	333	}
85571bc7 FB	334
5706db1d KZ	335	static int sdl_init_out(HWVoiceOut hw, struct audsettings as,
5706db1d KZ	336	void *drv_opaque)
85571bc7	337	{
ce31f099	338	SDLVoiceOut sdl = (SDLVoiceOut )hw;
85571bc7	339	SDL_AudioSpec req, obt;
4ff9786c	340	int endianness;
1d14ffa9	341	int err;
85bc5852	342	AudioFormat effective_fmt;
ce31f099 VR	343	Audiodev *dev = drv_opaque;
ce31f099 VR	344	AudiodevSdlPerDirectionOptions *spdo = dev->u.sdl.out;
1ea879e5	345	struct audsettings obt_as;
85571bc7	346
c0fe3827	347	req.freq = as->freq;
6c557ab9	348	req.format = aud_to_sdlfmt (as->fmt);
c0fe3827	349	req.channels = as->nchannels;
5a0926c2 VR	350	/*
	351	* This is wrong. SDL samples are QEMU frames. The buffer size will be
	352	* the requested buffer size multiplied by the number of channels.
	353	*/
	354	req.samples = audio_buffer_samples(
	355	qapi_AudiodevSdlPerDirectionOptions_base(spdo), as, 11610);
ce31f099	356	req.callback = sdl_callback_out;
85571bc7 FB	357	req.userdata = sdl;
85571bc7 FB	358
ce31f099 VR	359	sdl->dev = dev;
	360	sdl->devid = sdl_open(&req, &obt, 0);
	361	if (!sdl->devid) {
1d14ffa9 FB	362	return -1;
	363	}
	364
4ff9786c	365	err = sdl_to_audfmt(obt.format, &effective_fmt, &endianness);
1d14ffa9	366	if (err) {
ce31f099	367	sdl_close_out(sdl);
85571bc7	368	return -1;
1d14ffa9	369	}
85571bc7	370
c0fe3827 FB	371	obt_as.freq = obt.freq;
	372	obt_as.nchannels = obt.channels;
	373	obt_as.fmt = effective_fmt;
4ff9786c	374	obt_as.endianness = endianness;
c0fe3827	375
d929eba5	376	audio_pcm_init_info (&hw->info, &obt_as);
5a0926c2 VR	377	hw->samples = (spdo->has_buffer_count ? spdo->buffer_count : 4) *
5a0926c2 VR	378	obt.samples;
85571bc7	379
ce31f099 VR	380	sdl->initialized = 1;
ce31f099 VR	381	sdl->exit = 0;
85571bc7 FB	382	return 0;
	383	}
	384
571a8c52	385	static void sdl_enable_out(HWVoiceOut *hw, bool enable)
85571bc7	386	{
ce31f099 VR	387	SDLVoiceOut sdl = (SDLVoiceOut )hw;
	388
	389	SDL_PauseAudioDevice(sdl->devid, !enable);
85571bc7 FB	390	}
85571bc7 FB	391
c2031dea VR	392	static void sdl_fini_in(HWVoiceIn *hw)
	393	{
	394	SDLVoiceIn sdl = (SDLVoiceIn )hw;
	395
	396	sdl_close_in(sdl);
	397	}
	398
	399	static int sdl_init_in(HWVoiceIn hw, audsettings as, void *drv_opaque)
	400	{
	401	SDLVoiceIn sdl = (SDLVoiceIn )hw;
	402	SDL_AudioSpec req, obt;
	403	int endianness;
	404	int err;
	405	AudioFormat effective_fmt;
	406	Audiodev *dev = drv_opaque;
	407	AudiodevSdlPerDirectionOptions *spdo = dev->u.sdl.in;
	408	struct audsettings obt_as;
	409
	410	req.freq = as->freq;
	411	req.format = aud_to_sdlfmt(as->fmt);
	412	req.channels = as->nchannels;
	413	/* SDL samples are QEMU frames */
	414	req.samples = audio_buffer_frames(
	415	qapi_AudiodevSdlPerDirectionOptions_base(spdo), as, 11610);
	416	req.callback = sdl_callback_in;
	417	req.userdata = sdl;
	418
	419	sdl->dev = dev;
	420	sdl->devid = sdl_open(&req, &obt, 1);
	421	if (!sdl->devid) {
	422	return -1;
	423	}
	424
	425	err = sdl_to_audfmt(obt.format, &effective_fmt, &endianness);
	426	if (err) {
	427	sdl_close_in(sdl);
	428	return -1;
	429	}
	430
	431	obt_as.freq = obt.freq;
	432	obt_as.nchannels = obt.channels;
	433	obt_as.fmt = effective_fmt;
	434	obt_as.endianness = endianness;
	435
	436	audio_pcm_init_info(&hw->info, &obt_as);
	437	hw->samples = (spdo->has_buffer_count ? spdo->buffer_count : 4) *
	438	obt.samples;
	439	hw->size_emul = hw->samples * hw->info.bytes_per_frame;
	440	hw->buf_emul = g_malloc(hw->size_emul);
	441	hw->pos_emul = hw->pending_emul = 0;
	442
	443	sdl->initialized = 1;
	444	sdl->exit = 0;
	445	return 0;
	446	}
	447
	448	static void sdl_enable_in(HWVoiceIn *hw, bool enable)
	449	{
	450	SDLVoiceIn sdl = (SDLVoiceIn )hw;
	451
	452	SDL_PauseAudioDevice(sdl->devid, !enable);
	453	}
	454
71830221	455	static void sdl_audio_init(Audiodev dev)
85571bc7	456	{
85571bc7	457	if (SDL_InitSubSystem (SDL_INIT_AUDIO)) {
1d14ffa9	458	sdl_logerr ("SDL failed to initialize audio subsystem\n");
85571bc7 FB	459	return NULL;
	460	}
	461
ce31f099	462	return dev;
85571bc7 FB	463	}
	464
	465	static void sdl_audio_fini (void *opaque)
	466	{
85571bc7 FB	467	SDL_QuitSubSystem (SDL_INIT_AUDIO);
	468	}
	469
35f4b58c	470	static struct audio_pcm_ops sdl_pcm_ops = {
1dd3e4d1 JQ	471	.init_out = sdl_init_out,
1dd3e4d1 JQ	472	.fini_out = sdl_fini_out,
fdc8c5f4	473	/* wrapper for audio_generic_write */
ff718767	474	.write = sdl_write,
fdc8c5f4	475	/* wrapper for audio_generic_get_buffer_out */
ff718767	476	.get_buffer_out = sdl_get_buffer_out,
fdc8c5f4 VR	477	/* wrapper for audio_generic_put_buffer_out */
fdc8c5f4 VR	478	.put_buffer_out = sdl_put_buffer_out,
571a8c52	479	.enable_out = sdl_enable_out,
c2031dea VR	480	.init_in = sdl_init_in,
	481	.fini_in = sdl_fini_in,
	482	/* wrapper for audio_generic_read */
	483	.read = sdl_read,
	484	/* wrapper for audio_generic_get_buffer_in */
	485	.get_buffer_in = sdl_get_buffer_in,
	486	/* wrapper for audio_generic_put_buffer_in */
	487	.put_buffer_in = sdl_put_buffer_in,
	488	.enable_in = sdl_enable_in,
85571bc7 FB	489	};
85571bc7 FB	490
d3893a39	491	static struct audio_driver sdl_audio_driver = {
bee37f32 JQ	492	.name = "sdl",
bee37f32 JQ	493	.descr = "SDL http://www.libsdl.org",
bee37f32 JQ	494	.init = sdl_audio_init,
	495	.fini = sdl_audio_fini,
	496	.pcm_ops = &sdl_pcm_ops,
	497	.can_be_default = 1,
bd37ede4 VR	498	.max_voices_out = INT_MAX,
bd37ede4 VR	499	.max_voices_in = INT_MAX,
c2031dea VR	500	.voice_size_out = sizeof(SDLVoiceOut),
c2031dea VR	501	.voice_size_in = sizeof(SDLVoiceIn),
85571bc7	502	};
d3893a39 GH	503
	504	static void register_audio_sdl(void)
	505	{
	506	audio_driver_register(&sdl_audio_driver);
	507	}
	508	type_init(register_audio_sdl);