From ecd97e9592fefc5083f0d70fefadd42a1742a65f Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?K=C5=91v=C3=A1g=C3=B3=2C=20Zolt=C3=A1n?= Date: Mon, 19 Aug 2019 01:06:47 +0200 Subject: [PATCH] audio: basic support for multi backend audio MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Audio functions no longer access glob_audio_state, instead they get an AudioState as a parameter. This is required in order to support multiple backends. glob_audio_state is also gone, and replaced with a tailq so we can store more than one states. Signed-off-by: Kővágó, Zoltán Message-id: 67aef54f9e729a7160fe95c465351115e392164b.1566168923.git.DirtY.iCE.hu@gmail.com Signed-off-by: Gerd Hoffmann --- audio/audio.c | 102 +++++++++++++++++++++++++++++++---------- audio/audio.h | 12 +++-- audio/audio_int.h | 2 + audio/audio_template.h | 2 +- audio/wavcapture.c | 6 +-- monitor/misc.c | 2 +- ui/vnc.c | 2 +- 7 files changed, 95 insertions(+), 33 deletions(-) diff --git a/audio/audio.c b/audio/audio.c index 5aee54500e..17ef4f498f 100644 --- a/audio/audio.c +++ b/audio/audio.c @@ -87,7 +87,8 @@ audio_driver *audio_driver_lookup(const char *name) return NULL; } -static AudioState glob_audio_state; +static QTAILQ_HEAD(AudioStateHead, AudioState) audio_states = + QTAILQ_HEAD_INITIALIZER(audio_states); const struct mixeng_volume nominal_volume = { .mute = 0, @@ -1238,11 +1239,14 @@ static void audio_run_capture (AudioState *s) void audio_run (const char *msg) { - AudioState *s = &glob_audio_state; + AudioState *s; + + QTAILQ_FOREACH(s, &audio_states, list) { + audio_run_out(s); + audio_run_in(s); + audio_run_capture(s); + } - audio_run_out (s); - audio_run_in (s); - audio_run_capture (s); #ifdef DEBUG_POLL { static double prevtime; @@ -1306,13 +1310,11 @@ bool audio_is_cleaning_up(void) return is_cleaning_up; } -void audio_cleanup(void) +static void free_audio_state(AudioState *s) { - AudioState *s = &glob_audio_state; HWVoiceOut *hwo, *hwon; HWVoiceIn *hwi, *hwin; - is_cleaning_up = true; QLIST_FOREACH_SAFE(hwo, &s->hw_head_out, entries, hwon) { SWVoiceCap *sc; @@ -1349,6 +1351,17 @@ void audio_cleanup(void) qapi_free_Audiodev(s->dev); s->dev = NULL; } + g_free(s); +} + +void audio_cleanup(void) +{ + is_cleaning_up = true; + while (!QTAILQ_EMPTY(&audio_states)) { + AudioState *s = QTAILQ_FIRST(&audio_states); + QTAILQ_REMOVE(&audio_states, s, list); + free_audio_state(s); + } } static const VMStateDescription vmstate_audio = { @@ -1375,28 +1388,33 @@ static AudiodevListEntry *audiodev_find( return NULL; } -static int audio_init(Audiodev *dev) +/* + * if we have dev, this function was called because of an -audiodev argument => + * initialize a new state with it + * if dev == NULL => legacy implicit initialization, return the already created + * state or create a new one + */ +static AudioState *audio_init(Audiodev *dev) { + static bool atexit_registered; size_t i; int done = 0; const char *drvname = NULL; VMChangeStateEntry *e; - AudioState *s = &glob_audio_state; + AudioState *s; struct audio_driver *driver; /* silence gcc warning about uninitialized variable */ AudiodevListHead head = QSIMPLEQ_HEAD_INITIALIZER(head); - if (s->drv) { - if (dev) { - dolog("Cannot create more than one audio backend, sorry\n"); - qapi_free_Audiodev(dev); - } - return -1; - } - if (dev) { /* -audiodev option */ drvname = AudiodevDriver_str(dev->driver); + } else if (!QTAILQ_EMPTY(&audio_states)) { + /* + * todo: check for -audiodev once we have normal audiodev selection + * support + */ + return QTAILQ_FIRST(&audio_states); } else { /* legacy implicit initialization */ head = audio_handle_legacy_opts(); @@ -1410,12 +1428,18 @@ static int audio_init(Audiodev *dev) dev = QSIMPLEQ_FIRST(&head)->dev; audio_validate_opts(dev, &error_abort); } + + s = g_malloc0(sizeof(AudioState)); s->dev = dev; QLIST_INIT (&s->hw_head_out); QLIST_INIT (&s->hw_head_in); QLIST_INIT (&s->cap_head); - atexit(audio_cleanup); + if (!atexit_registered) { + atexit(audio_cleanup); + atexit_registered = true; + } + QTAILQ_INSERT_TAIL(&audio_states, s, list); s->ts = timer_new_ns(QEMU_CLOCK_VIRTUAL, audio_timer, s); @@ -1480,7 +1504,7 @@ static int audio_init(Audiodev *dev) QLIST_INIT (&s->card_head); vmstate_register (NULL, 0, &vmstate_audio, s); - return 0; + return s; } void audio_free_audiodev_list(AudiodevListHead *head) @@ -1495,10 +1519,13 @@ void audio_free_audiodev_list(AudiodevListHead *head) void AUD_register_card (const char *name, QEMUSoundCard *card) { - audio_init(NULL); + if (!card->state) { + card->state = audio_init(NULL); + } + card->name = g_strdup (name); memset (&card->entries, 0, sizeof (card->entries)); - QLIST_INSERT_HEAD (&glob_audio_state.card_head, card, entries); + QLIST_INSERT_HEAD(&card->state->card_head, card, entries); } void AUD_remove_card (QEMUSoundCard *card) @@ -1508,16 +1535,21 @@ void AUD_remove_card (QEMUSoundCard *card) } -CaptureVoiceOut *AUD_add_capture ( +CaptureVoiceOut *AUD_add_capture( + AudioState *s, struct audsettings *as, struct audio_capture_ops *ops, void *cb_opaque ) { - AudioState *s = &glob_audio_state; CaptureVoiceOut *cap; struct capture_callback *cb; + if (!s) { + /* todo: remove when we have normal audiodev selection support */ + s = audio_init(NULL); + } + if (audio_validate_settings (as)) { dolog ("Invalid settings were passed when trying to add capture\n"); audio_print_settings (as); @@ -1807,3 +1839,25 @@ int audio_buffer_bytes(AudiodevPerDirectionOptions *pdo, return audio_buffer_samples(pdo, as, def_usecs) * audioformat_bytes_per_sample(as->fmt); } + +AudioState *audio_state_by_name(const char *name) +{ + AudioState *s; + QTAILQ_FOREACH(s, &audio_states, list) { + assert(s->dev); + if (strcmp(name, s->dev->id) == 0) { + return s; + } + } + return NULL; +} + +const char *audio_get_id(QEMUSoundCard *card) +{ + if (card->state) { + assert(card->state->dev); + return card->state->dev->id; + } else { + return ""; + } +} diff --git a/audio/audio.h b/audio/audio.h index 64b0f761bc..ad2457f4de 100644 --- a/audio/audio.h +++ b/audio/audio.h @@ -78,8 +78,10 @@ typedef struct SWVoiceOut SWVoiceOut; typedef struct CaptureVoiceOut CaptureVoiceOut; typedef struct SWVoiceIn SWVoiceIn; +typedef struct AudioState AudioState; typedef struct QEMUSoundCard { char *name; + AudioState *state; QLIST_ENTRY (QEMUSoundCard) entries; } QEMUSoundCard; @@ -92,7 +94,8 @@ void AUD_log (const char *cap, const char *fmt, ...) GCC_FMT_ATTR(2, 3); void AUD_register_card (const char *name, QEMUSoundCard *card); void AUD_remove_card (QEMUSoundCard *card); -CaptureVoiceOut *AUD_add_capture ( +CaptureVoiceOut *AUD_add_capture( + AudioState *s, struct audsettings *as, struct audio_capture_ops *ops, void *opaque @@ -160,8 +163,8 @@ static inline void *advance (void *p, int incr) #define audio_MAX(a, b) ((a)<(b)?(b):(a)) #endif -int wav_start_capture (CaptureState *s, const char *path, int freq, - int bits, int nchannels); +int wav_start_capture(AudioState *state, CaptureState *s, const char *path, + int freq, int bits, int nchannels); bool audio_is_cleaning_up(void); void audio_cleanup(void); @@ -175,4 +178,7 @@ void audio_parse_option(const char *opt); void audio_init_audiodevs(void); void audio_legacy_help(void); +AudioState *audio_state_by_name(const char *name); +const char *audio_get_id(QEMUSoundCard *card); + #endif /* QEMU_AUDIO_H */ diff --git a/audio/audio_int.h b/audio/audio_int.h index 8164696b2c..9f01f6ad00 100644 --- a/audio/audio_int.h +++ b/audio/audio_int.h @@ -196,6 +196,8 @@ typedef struct AudioState { bool timer_running; uint64_t timer_last; + + QTAILQ_ENTRY(AudioState) list; } AudioState; extern const struct mixeng_volume nominal_volume; diff --git a/audio/audio_template.h b/audio/audio_template.h index c721fed75d..54f07338e7 100644 --- a/audio/audio_template.h +++ b/audio/audio_template.h @@ -428,7 +428,7 @@ SW *glue (AUD_open_, TYPE) ( struct audsettings *as ) { - AudioState *s = &glob_audio_state; + AudioState *s = card->state; AudiodevPerDirectionOptions *pdo = glue(audio_get_pdo_, TYPE)(s->dev); if (audio_bug(__func__, !card || !name || !callback_fn || !as)) { diff --git a/audio/wavcapture.c b/audio/wavcapture.c index 493edc60e4..8d7ce2eda1 100644 --- a/audio/wavcapture.c +++ b/audio/wavcapture.c @@ -104,8 +104,8 @@ static struct capture_ops wav_capture_ops = { .info = wav_capture_info }; -int wav_start_capture (CaptureState *s, const char *path, int freq, - int bits, int nchannels) +int wav_start_capture(AudioState *state, CaptureState *s, const char *path, + int freq, int bits, int nchannels) { WAVState *wav; uint8_t hdr[] = { @@ -170,7 +170,7 @@ int wav_start_capture (CaptureState *s, const char *path, int freq, goto error_free; } - cap = AUD_add_capture (&as, &ops, wav); + cap = AUD_add_capture(state, &as, &ops, wav); if (!cap) { error_report("Failed to add audio capture"); goto error_free; diff --git a/monitor/misc.c b/monitor/misc.c index d229e65450..6b71059739 100644 --- a/monitor/misc.c +++ b/monitor/misc.c @@ -1156,7 +1156,7 @@ static void hmp_wavcapture(Monitor *mon, const QDict *qdict) bits = has_bits ? bits : 16; nchannels = has_channels ? nchannels : 2; - if (wav_start_capture (s, path, freq, bits, nchannels)) { + if (wav_start_capture(NULL, s, path, freq, bits, nchannels)) { monitor_printf(mon, "Failed to add wave capture\n"); g_free (s); return; diff --git a/ui/vnc.c b/ui/vnc.c index 4812ed29d0..ed5e8aa5f8 100644 --- a/ui/vnc.c +++ b/ui/vnc.c @@ -1224,7 +1224,7 @@ static void audio_add(VncState *vs) ops.destroy = audio_capture_destroy; ops.capture = audio_capture; - vs->audio_cap = AUD_add_capture(&vs->as, &ops, vs); + vs->audio_cap = AUD_add_capture(NULL, &vs->as, &ops, vs); if (!vs->audio_cap) { error_report("Failed to add audio capture"); }