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qemu/audio/audio_template.h

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/*
* QEMU Audio subsystem header
*
* Copyright (c) 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.
*/
#ifdef DAC
#define NAME "playback"
#define HWBUF hw->mix_buf
#define TYPE out
#define HW HWVoiceOut
#define SW SWVoiceOut
#else
#define NAME "capture"
#define TYPE in
#define HW HWVoiceIn
#define SW SWVoiceIn
#define HWBUF hw->conv_buf
#endif
static void glue (audio_init_nb_voices_, TYPE) (struct audio_driver *drv)
{
AudioState *s = &glob_audio_state;
int max_voices = glue (drv->max_voices_, TYPE);
int voice_size = glue (drv->voice_size_, TYPE);
if (glue (s->nb_hw_voices_, TYPE) > max_voices) {
if (!max_voices) {
#ifdef DAC
dolog ("Driver `%s' does not support " NAME "\n", drv->name);
#endif
}
else {
dolog ("Driver `%s' does not support %d " NAME " voices, max %d\n",
drv->name,
glue (s->nb_hw_voices_, TYPE),
max_voices);
}
glue (s->nb_hw_voices_, TYPE) = max_voices;
}
if (audio_bug (AUDIO_FUNC, !voice_size && max_voices)) {
dolog ("drv=`%s' voice_size=0 max_voices=%d\n",
drv->name, max_voices);
glue (s->nb_hw_voices_, TYPE) = 0;
}
if (audio_bug (AUDIO_FUNC, voice_size && !max_voices)) {
dolog ("drv=`%s' voice_size=%d max_voices=0\n",
drv->name, voice_size);
}
}
static void glue (audio_pcm_hw_free_resources_, TYPE) (HW *hw)
{
if (HWBUF) {
g_free (HWBUF);
}
HWBUF = NULL;
}
static int glue (audio_pcm_hw_alloc_resources_, TYPE) (HW *hw)
{
HWBUF = audio_calloc (AUDIO_FUNC, hw->samples, sizeof (struct st_sample));
if (!HWBUF) {
dolog ("Could not allocate " NAME " buffer (%d samples)\n",
hw->samples);
return -1;
}
return 0;
}
static void glue (audio_pcm_sw_free_resources_, TYPE) (SW *sw)
{
if (sw->buf) {
g_free (sw->buf);
}
if (sw->rate) {
st_rate_stop (sw->rate);
}
sw->buf = NULL;
sw->rate = NULL;
}
static int glue (audio_pcm_sw_alloc_resources_, TYPE) (SW *sw)
{
int samples;
samples = ((int64_t) sw->hw->samples << 32) / sw->ratio;
sw->buf = audio_calloc (AUDIO_FUNC, samples, sizeof (struct st_sample));
if (!sw->buf) {
dolog ("Could not allocate buffer for `%s' (%d samples)\n",
SW_NAME (sw), samples);
return -1;
}
#ifdef DAC
sw->rate = st_rate_start (sw->info.freq, sw->hw->info.freq);
#else
sw->rate = st_rate_start (sw->hw->info.freq, sw->info.freq);
#endif
if (!sw->rate) {
g_free (sw->buf);
sw->buf = NULL;
return -1;
}
return 0;
}
static int glue (audio_pcm_sw_init_, TYPE) (
SW *sw,
HW *hw,
const char *name,
struct audsettings *as
)
{
int err;
audio_pcm_init_info (&sw->info, as);
sw->hw = hw;
sw->active = 0;
#ifdef DAC
sw->ratio = ((int64_t) sw->hw->info.freq << 32) / sw->info.freq;
sw->total_hw_samples_mixed = 0;
sw->empty = 1;
#else
sw->ratio = ((int64_t) sw->info.freq << 32) / sw->hw->info.freq;
#endif
#ifdef DAC
sw->conv = mixeng_conv
#else
sw->clip = mixeng_clip
#endif
[sw->info.nchannels == 2]
[sw->info.sign]
[sw->info.swap_endianness]
[audio_bits_to_index (sw->info.bits)];
sw->name = g_strdup (name);
err = glue (audio_pcm_sw_alloc_resources_, TYPE) (sw);
if (err) {
g_free (sw->name);
sw->name = NULL;
}
return err;
}
static void glue (audio_pcm_sw_fini_, TYPE) (SW *sw)
{
glue (audio_pcm_sw_free_resources_, TYPE) (sw);
if (sw->name) {
g_free (sw->name);
sw->name = NULL;
}
}
static void glue (audio_pcm_hw_add_sw_, TYPE) (HW *hw, SW *sw)
{
QLIST_INSERT_HEAD (&hw->sw_head, sw, entries);
}
static void glue (audio_pcm_hw_del_sw_, TYPE) (SW *sw)
{
QLIST_REMOVE (sw, entries);
}
static void glue (audio_pcm_hw_gc_, TYPE) (HW **hwp)
{
AudioState *s = &glob_audio_state;
HW *hw = *hwp;
if (!hw->sw_head.lh_first) {
#ifdef DAC
audio_detach_capture (hw);
#endif
QLIST_REMOVE (hw, entries);
glue (s->nb_hw_voices_, TYPE) += 1;
glue (audio_pcm_hw_free_resources_ ,TYPE) (hw);
glue (hw->pcm_ops->fini_, TYPE) (hw);
g_free (hw);
*hwp = NULL;
}
}
static HW *glue (audio_pcm_hw_find_any_, TYPE) (HW *hw)
{
AudioState *s = &glob_audio_state;
return hw ? hw->entries.le_next : glue (s->hw_head_, TYPE).lh_first;
}
static HW *glue (audio_pcm_hw_find_any_enabled_, TYPE) (HW *hw)
{
while ((hw = glue (audio_pcm_hw_find_any_, TYPE) (hw))) {
if (hw->enabled) {
return hw;
}
}
return NULL;
}
static HW *glue (audio_pcm_hw_find_specific_, TYPE) (
HW *hw,
struct audsettings *as
)
{
while ((hw = glue (audio_pcm_hw_find_any_, TYPE) (hw))) {
if (audio_pcm_info_eq (&hw->info, as)) {
return hw;
}
}
return NULL;
}
static HW *glue (audio_pcm_hw_add_new_, TYPE) (struct audsettings *as)
{
HW *hw;
AudioState *s = &glob_audio_state;
struct audio_driver *drv = s->drv;
if (!glue (s->nb_hw_voices_, TYPE)) {
return NULL;
}
if (audio_bug (AUDIO_FUNC, !drv)) {
dolog ("No host audio driver\n");
return NULL;
}
if (audio_bug (AUDIO_FUNC, !drv->pcm_ops)) {
dolog ("Host audio driver without pcm_ops\n");
return NULL;
}
hw = audio_calloc (AUDIO_FUNC, 1, glue (drv->voice_size_, TYPE));
if (!hw) {
dolog ("Can not allocate voice `%s' size %d\n",
drv->name, glue (drv->voice_size_, TYPE));
return NULL;
}
hw->pcm_ops = drv->pcm_ops;
hw->ctl_caps = drv->ctl_caps;
QLIST_INIT (&hw->sw_head);
#ifdef DAC
QLIST_INIT (&hw->cap_head);
#endif
if (glue (hw->pcm_ops->init_, TYPE) (hw, as)) {
goto err0;
}
if (audio_bug (AUDIO_FUNC, hw->samples <= 0)) {
dolog ("hw->samples=%d\n", hw->samples);
goto err1;
}
#ifdef DAC
hw->clip = mixeng_clip
#else
hw->conv = mixeng_conv
#endif
[hw->info.nchannels == 2]
[hw->info.sign]
[hw->info.swap_endianness]
[audio_bits_to_index (hw->info.bits)];
if (glue (audio_pcm_hw_alloc_resources_, TYPE) (hw)) {
goto err1;
}
QLIST_INSERT_HEAD (&s->glue (hw_head_, TYPE), hw, entries);
glue (s->nb_hw_voices_, TYPE) -= 1;
#ifdef DAC
audio_attach_capture (hw);
#endif
return hw;
err1:
glue (hw->pcm_ops->fini_, TYPE) (hw);
err0:
g_free (hw);
return NULL;
}
static HW *glue (audio_pcm_hw_add_, TYPE) (struct audsettings *as)
{
HW *hw;
if (glue (conf.fixed_, TYPE).enabled && glue (conf.fixed_, TYPE).greedy) {
hw = glue (audio_pcm_hw_add_new_, TYPE) (as);
if (hw) {
return hw;
}
}
hw = glue (audio_pcm_hw_find_specific_, TYPE) (NULL, as);
if (hw) {
return hw;
}
hw = glue (audio_pcm_hw_add_new_, TYPE) (as);
if (hw) {
return hw;
}
return glue (audio_pcm_hw_find_any_, TYPE) (NULL);
}
static SW *glue (audio_pcm_create_voice_pair_, TYPE) (
const char *sw_name,
struct audsettings *as
)
{
SW *sw;
HW *hw;
struct audsettings hw_as;
if (glue (conf.fixed_, TYPE).enabled) {
hw_as = glue (conf.fixed_, TYPE).settings;
}
else {
hw_as = *as;
}
sw = audio_calloc (AUDIO_FUNC, 1, sizeof (*sw));
if (!sw) {
dolog ("Could not allocate soft voice `%s' (%zu bytes)\n",
sw_name ? sw_name : "unknown", sizeof (*sw));
goto err1;
}
hw = glue (audio_pcm_hw_add_, TYPE) (&hw_as);
if (!hw) {
goto err2;
}
glue (audio_pcm_hw_add_sw_, TYPE) (hw, sw);
if (glue (audio_pcm_sw_init_, TYPE) (sw, hw, sw_name, as)) {
goto err3;
}
return sw;
err3:
glue (audio_pcm_hw_del_sw_, TYPE) (sw);
glue (audio_pcm_hw_gc_, TYPE) (&hw);
err2:
g_free (sw);
err1:
return NULL;
}
static void glue (audio_close_, TYPE) (SW *sw)
{
glue (audio_pcm_sw_fini_, TYPE) (sw);
glue (audio_pcm_hw_del_sw_, TYPE) (sw);
glue (audio_pcm_hw_gc_, TYPE) (&sw->hw);
g_free (sw);
}
void glue (AUD_close_, TYPE) (QEMUSoundCard *card, SW *sw)
{
if (sw) {
if (audio_bug (AUDIO_FUNC, !card)) {
dolog ("card=%p\n", card);
return;
}
glue (audio_close_, TYPE) (sw);
}
}
SW *glue (AUD_open_, TYPE) (
QEMUSoundCard *card,
SW *sw,
const char *name,
void *callback_opaque ,
audio_callback_fn callback_fn,
struct audsettings *as
)
{
AudioState *s = &glob_audio_state;
#ifdef DAC
int live = 0;
SW *old_sw = NULL;
#endif
if (audio_bug (AUDIO_FUNC, !card || !name || !callback_fn || !as)) {
dolog ("card=%p name=%p callback_fn=%p as=%p\n",
card, name, callback_fn, as);
goto fail;
}
ldebug ("open %s, freq %d, nchannels %d, fmt %d\n",
name, as->freq, as->nchannels, as->fmt);
if (audio_bug (AUDIO_FUNC, audio_validate_settings (as))) {
audio_print_settings (as);
goto fail;
}
if (audio_bug (AUDIO_FUNC, !s->drv)) {
dolog ("Can not open `%s' (no host audio driver)\n", name);
goto fail;
}
if (sw && audio_pcm_info_eq (&sw->info, as)) {
return sw;
}
#ifdef DAC
if (conf.plive && sw && (!sw->active && !sw->empty)) {
live = sw->total_hw_samples_mixed;
#ifdef DEBUG_PLIVE
dolog ("Replacing voice %s with %d live samples\n", SW_NAME (sw), live);
dolog ("Old %s freq %d, bits %d, channels %d\n",
SW_NAME (sw), sw->info.freq, sw->info.bits, sw->info.nchannels);
dolog ("New %s freq %d, bits %d, channels %d\n",
name,
as->freq,
(as->fmt == AUD_FMT_S16 || as->fmt == AUD_FMT_U16) ? 16 : 8,
as->nchannels);
#endif
if (live) {
old_sw = sw;
old_sw->callback.fn = NULL;
sw = NULL;
}
}
#endif
if (!glue (conf.fixed_, TYPE).enabled && sw) {
glue (AUD_close_, TYPE) (card, sw);
sw = NULL;
}
if (sw) {
HW *hw = sw->hw;
if (!hw) {
dolog ("Internal logic error voice `%s' has no hardware store\n",
SW_NAME (sw));
goto fail;
}
glue (audio_pcm_sw_fini_, TYPE) (sw);
if (glue (audio_pcm_sw_init_, TYPE) (sw, hw, name, as)) {
goto fail;
}
}
else {
sw = glue (audio_pcm_create_voice_pair_, TYPE) (name, as);
if (!sw) {
dolog ("Failed to create voice `%s'\n", name);
return NULL;
}
}
sw->card = card;
sw->vol = nominal_volume;
sw->callback.fn = callback_fn;
sw->callback.opaque = callback_opaque;
#ifdef DAC
if (live) {
int mixed =
(live << old_sw->info.shift)
* old_sw->info.bytes_per_second
/ sw->info.bytes_per_second;
#ifdef DEBUG_PLIVE
dolog ("Silence will be mixed %d\n", mixed);
#endif
sw->total_hw_samples_mixed += mixed;
}
#endif
#ifdef DEBUG_AUDIO
dolog ("%s\n", name);
audio_pcm_print_info ("hw", &sw->hw->info);
audio_pcm_print_info ("sw", &sw->info);
#endif
return sw;
fail:
glue (AUD_close_, TYPE) (card, sw);
return NULL;
}
int glue (AUD_is_active_, TYPE) (SW *sw)
{
return sw ? sw->active : 0;
}
void glue (AUD_init_time_stamp_, TYPE) (SW *sw, QEMUAudioTimeStamp *ts)
{
if (!sw) {
return;
}
ts->old_ts = sw->hw->ts_helper;
}
uint64_t glue (AUD_get_elapsed_usec_, TYPE) (SW *sw, QEMUAudioTimeStamp *ts)
{
uint64_t delta, cur_ts, old_ts;
if (!sw) {
return 0;
}
cur_ts = sw->hw->ts_helper;
old_ts = ts->old_ts;
/* dolog ("cur %" PRId64 " old %" PRId64 "\n", cur_ts, old_ts); */
if (cur_ts >= old_ts) {
delta = cur_ts - old_ts;
}
else {
delta = UINT64_MAX - old_ts + cur_ts;
}
if (!delta) {
return 0;
}
return muldiv64 (delta, sw->hw->info.freq, 1000000);
}
#undef TYPE
#undef HW
#undef SW
#undef HWBUF
#undef NAME
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