/* * QEMU Audio subsystem: legacy configuration handling * * Copyright (c) 2015-2019 Zoltán Kővágó <DirtY.iCE.hu@gmail.com> * * 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 "audio.h" #include "audio_int.h" #include "qemu/cutils.h" #include "qemu/timer.h" #include "qapi/error.h" #include "qapi/qapi-visit-audio.h" #include "qapi/visitor-impl.h" #define AUDIO_CAP "audio-legacy" #include "audio_int.h" static uint32_t toui32(const char *str) { unsigned long long ret; if (parse_uint_full(str, &ret, 10) || ret > UINT32_MAX) { dolog("Invalid integer value `%s'\n", str); exit(1); } return ret; } /* helper functions to convert env variables */ static void get_bool(const char *env, bool *dst, bool *has_dst) { const char *val = getenv(env); if (val) { *dst = toui32(val) != 0; *has_dst = true; } } static void get_int(const char *env, uint32_t *dst, bool *has_dst) { const char *val = getenv(env); if (val) { *dst = toui32(val); *has_dst = true; } } static void get_str(const char *env, char **dst, bool *has_dst) { const char *val = getenv(env); if (val) { if (*has_dst) { g_free(*dst); } *dst = g_strdup(val); *has_dst = true; } } static void get_fmt(const char *env, AudioFormat *dst, bool *has_dst) { const char *val = getenv(env); if (val) { size_t i; for (i = 0; AudioFormat_lookup.size; ++i) { if (strcasecmp(val, AudioFormat_lookup.array[i]) == 0) { *dst = i; *has_dst = true; return; } } dolog("Invalid audio format `%s'\n", val); exit(1); } } static void get_millis_to_usecs(const char *env, uint32_t *dst, bool *has_dst) { const char *val = getenv(env); if (val) { *dst = toui32(val) * 1000; *has_dst = true; } } static uint32_t frames_to_usecs(uint32_t frames, AudiodevPerDirectionOptions *pdo) { uint32_t freq = pdo->has_frequency ? pdo->frequency : 44100; return (frames * 1000000 + freq / 2) / freq; } static void get_frames_to_usecs(const char *env, uint32_t *dst, bool *has_dst, AudiodevPerDirectionOptions *pdo) { const char *val = getenv(env); if (val) { *dst = frames_to_usecs(toui32(val), pdo); *has_dst = true; } } static uint32_t samples_to_usecs(uint32_t samples, AudiodevPerDirectionOptions *pdo) { uint32_t channels = pdo->has_channels ? pdo->channels : 2; return frames_to_usecs(samples / channels, pdo); } static void get_samples_to_usecs(const char *env, uint32_t *dst, bool *has_dst, AudiodevPerDirectionOptions *pdo) { const char *val = getenv(env); if (val) { *dst = samples_to_usecs(toui32(val), pdo); *has_dst = true; } } static uint32_t bytes_to_usecs(uint32_t bytes, AudiodevPerDirectionOptions *pdo) { AudioFormat fmt = pdo->has_format ? pdo->format : AUDIO_FORMAT_S16; uint32_t bytes_per_sample = audioformat_bytes_per_sample(fmt); return samples_to_usecs(bytes / bytes_per_sample, pdo); } static void get_bytes_to_usecs(const char *env, uint32_t *dst, bool *has_dst, AudiodevPerDirectionOptions *pdo) { const char *val = getenv(env); if (val) { *dst = bytes_to_usecs(toui32(val), pdo); *has_dst = true; } } /* backend specific functions */ /* ALSA */ static void handle_alsa_per_direction( AudiodevAlsaPerDirectionOptions *apdo, const char *prefix) { char buf[64]; size_t len = strlen(prefix); bool size_in_usecs = false; bool dummy; memcpy(buf, prefix, len); strcpy(buf + len, "TRY_POLL"); get_bool(buf, &apdo->try_poll, &apdo->has_try_poll); strcpy(buf + len, "DEV"); get_str(buf, &apdo->dev, &apdo->has_dev); strcpy(buf + len, "SIZE_IN_USEC"); get_bool(buf, &size_in_usecs, &dummy); strcpy(buf + len, "PERIOD_SIZE"); get_int(buf, &apdo->period_length, &apdo->has_period_length); if (apdo->has_period_length && !size_in_usecs) { apdo->period_length = frames_to_usecs( apdo->period_length, qapi_AudiodevAlsaPerDirectionOptions_base(apdo)); } strcpy(buf + len, "BUFFER_SIZE"); get_int(buf, &apdo->buffer_length, &apdo->has_buffer_length); if (apdo->has_buffer_length && !size_in_usecs) { apdo->buffer_length = frames_to_usecs( apdo->buffer_length, qapi_AudiodevAlsaPerDirectionOptions_base(apdo)); } } static void handle_alsa(Audiodev *dev) { AudiodevAlsaOptions *aopt = &dev->u.alsa; handle_alsa_per_direction(aopt->in, "QEMU_ALSA_ADC_"); handle_alsa_per_direction(aopt->out, "QEMU_ALSA_DAC_"); get_millis_to_usecs("QEMU_ALSA_THRESHOLD", &aopt->threshold, &aopt->has_threshold); } /* coreaudio */ static void handle_coreaudio(Audiodev *dev) { get_frames_to_usecs( "QEMU_COREAUDIO_BUFFER_SIZE", &dev->u.coreaudio.out->buffer_length, &dev->u.coreaudio.out->has_buffer_length, qapi_AudiodevCoreaudioPerDirectionOptions_base(dev->u.coreaudio.out)); get_int("QEMU_COREAUDIO_BUFFER_COUNT", &dev->u.coreaudio.out->buffer_count, &dev->u.coreaudio.out->has_buffer_count); } /* dsound */ static void handle_dsound(Audiodev *dev) { get_millis_to_usecs("QEMU_DSOUND_LATENCY_MILLIS", &dev->u.dsound.latency, &dev->u.dsound.has_latency); get_bytes_to_usecs("QEMU_DSOUND_BUFSIZE_OUT", &dev->u.dsound.out->buffer_length, &dev->u.dsound.out->has_buffer_length, dev->u.dsound.out); get_bytes_to_usecs("QEMU_DSOUND_BUFSIZE_IN", &dev->u.dsound.in->buffer_length, &dev->u.dsound.in->has_buffer_length, dev->u.dsound.in); } /* OSS */ static void handle_oss_per_direction( AudiodevOssPerDirectionOptions *opdo, const char *try_poll_env, const char *dev_env) { get_bool(try_poll_env, &opdo->try_poll, &opdo->has_try_poll); get_str(dev_env, &opdo->dev, &opdo->has_dev); get_bytes_to_usecs("QEMU_OSS_FRAGSIZE", &opdo->buffer_length, &opdo->has_buffer_length, qapi_AudiodevOssPerDirectionOptions_base(opdo)); get_int("QEMU_OSS_NFRAGS", &opdo->buffer_count, &opdo->has_buffer_count); } static void handle_oss(Audiodev *dev) { AudiodevOssOptions *oopt = &dev->u.oss; handle_oss_per_direction(oopt->in, "QEMU_AUDIO_ADC_TRY_POLL", "QEMU_OSS_ADC_DEV"); handle_oss_per_direction(oopt->out, "QEMU_AUDIO_DAC_TRY_POLL", "QEMU_OSS_DAC_DEV"); get_bool("QEMU_OSS_MMAP", &oopt->try_mmap, &oopt->has_try_mmap); get_bool("QEMU_OSS_EXCLUSIVE", &oopt->exclusive, &oopt->has_exclusive); get_int("QEMU_OSS_POLICY", &oopt->dsp_policy, &oopt->has_dsp_policy); } /* pulseaudio */ static void handle_pa_per_direction( AudiodevPaPerDirectionOptions *ppdo, const char *env) { get_str(env, &ppdo->name, &ppdo->has_name); } static void handle_pa(Audiodev *dev) { handle_pa_per_direction(dev->u.pa.in, "QEMU_PA_SOURCE"); handle_pa_per_direction(dev->u.pa.out, "QEMU_PA_SINK"); get_samples_to_usecs( "QEMU_PA_SAMPLES", &dev->u.pa.in->buffer_length, &dev->u.pa.in->has_buffer_length, qapi_AudiodevPaPerDirectionOptions_base(dev->u.pa.in)); get_samples_to_usecs( "QEMU_PA_SAMPLES", &dev->u.pa.out->buffer_length, &dev->u.pa.out->has_buffer_length, qapi_AudiodevPaPerDirectionOptions_base(dev->u.pa.out)); get_str("QEMU_PA_SERVER", &dev->u.pa.server, &dev->u.pa.has_server); } /* SDL */ static void handle_sdl(Audiodev *dev) { /* SDL is output only */ get_samples_to_usecs("QEMU_SDL_SAMPLES", &dev->u.sdl.out->buffer_length, &dev->u.sdl.out->has_buffer_length, dev->u.sdl.out); } /* wav */ static void handle_wav(Audiodev *dev) { get_int("QEMU_WAV_FREQUENCY", &dev->u.wav.out->frequency, &dev->u.wav.out->has_frequency); get_fmt("QEMU_WAV_FORMAT", &dev->u.wav.out->format, &dev->u.wav.out->has_format); get_int("QEMU_WAV_DAC_FIXED_CHANNELS", &dev->u.wav.out->channels, &dev->u.wav.out->has_channels); get_str("QEMU_WAV_PATH", &dev->u.wav.path, &dev->u.wav.has_path); } /* general */ static void handle_per_direction( AudiodevPerDirectionOptions *pdo, const char *prefix) { char buf[64]; size_t len = strlen(prefix); memcpy(buf, prefix, len); strcpy(buf + len, "FIXED_SETTINGS"); get_bool(buf, &pdo->fixed_settings, &pdo->has_fixed_settings); strcpy(buf + len, "FIXED_FREQ"); get_int(buf, &pdo->frequency, &pdo->has_frequency); strcpy(buf + len, "FIXED_FMT"); get_fmt(buf, &pdo->format, &pdo->has_format); strcpy(buf + len, "FIXED_CHANNELS"); get_int(buf, &pdo->channels, &pdo->has_channels); strcpy(buf + len, "VOICES"); get_int(buf, &pdo->voices, &pdo->has_voices); } static AudiodevListEntry *legacy_opt(const char *drvname) { AudiodevListEntry *e = g_malloc0(sizeof(AudiodevListEntry)); e->dev = g_malloc0(sizeof(Audiodev)); e->dev->id = g_strdup(drvname); e->dev->driver = qapi_enum_parse( &AudiodevDriver_lookup, drvname, -1, &error_abort); audio_create_pdos(e->dev); handle_per_direction(audio_get_pdo_in(e->dev), "QEMU_AUDIO_ADC_"); handle_per_direction(audio_get_pdo_out(e->dev), "QEMU_AUDIO_DAC_"); /* Original description: Timer period in HZ (0 - use lowest possible) */ get_int("QEMU_AUDIO_TIMER_PERIOD", &e->dev->timer_period, &e->dev->has_timer_period); if (e->dev->has_timer_period && e->dev->timer_period) { e->dev->timer_period = NANOSECONDS_PER_SECOND / 1000 / e->dev->timer_period; } switch (e->dev->driver) { case AUDIODEV_DRIVER_ALSA: handle_alsa(e->dev); break; case AUDIODEV_DRIVER_COREAUDIO: handle_coreaudio(e->dev); break; case AUDIODEV_DRIVER_DSOUND: handle_dsound(e->dev); break; case AUDIODEV_DRIVER_OSS: handle_oss(e->dev); break; case AUDIODEV_DRIVER_PA: handle_pa(e->dev); break; case AUDIODEV_DRIVER_SDL: handle_sdl(e->dev); break; case AUDIODEV_DRIVER_WAV: handle_wav(e->dev); break; default: break; } return e; } AudiodevListHead audio_handle_legacy_opts(void) { const char *drvname = getenv("QEMU_AUDIO_DRV"); AudiodevListHead head = QSIMPLEQ_HEAD_INITIALIZER(head); if (drvname) { AudiodevListEntry *e; audio_driver *driver = audio_driver_lookup(drvname); if (!driver) { dolog("Unknown audio driver `%s'\n", drvname); exit(1); } e = legacy_opt(drvname); QSIMPLEQ_INSERT_TAIL(&head, e, next); } else { for (int i = 0; audio_prio_list[i]; i++) { audio_driver *driver = audio_driver_lookup(audio_prio_list[i]); if (driver && driver->can_be_default) { AudiodevListEntry *e = legacy_opt(driver->name); QSIMPLEQ_INSERT_TAIL(&head, e, next); } } if (QSIMPLEQ_EMPTY(&head)) { dolog("Internal error: no default audio driver available\n"); exit(1); } } return head; } /* visitor to print -audiodev option */ typedef struct { Visitor visitor; bool comma; GList *path; } LegacyPrintVisitor; static void lv_start_struct(Visitor *v, const char *name, void **obj, size_t size, Error **errp) { LegacyPrintVisitor *lv = (LegacyPrintVisitor *) v; lv->path = g_list_append(lv->path, g_strdup(name)); } static void lv_end_struct(Visitor *v, void **obj) { LegacyPrintVisitor *lv = (LegacyPrintVisitor *) v; lv->path = g_list_delete_link(lv->path, g_list_last(lv->path)); } static void lv_print_key(Visitor *v, const char *name) { GList *e; LegacyPrintVisitor *lv = (LegacyPrintVisitor *) v; if (lv->comma) { putchar(','); } else { lv->comma = true; } for (e = lv->path; e; e = e->next) { if (e->data) { printf("%s.", (const char *) e->data); } } printf("%s=", name); } static void lv_type_int64(Visitor *v, const char *name, int64_t *obj, Error **errp) { lv_print_key(v, name); printf("%" PRIi64, *obj); } static void lv_type_uint64(Visitor *v, const char *name, uint64_t *obj, Error **errp) { lv_print_key(v, name); printf("%" PRIu64, *obj); } static void lv_type_bool(Visitor *v, const char *name, bool *obj, Error **errp) { lv_print_key(v, name); printf("%s", *obj ? "on" : "off"); } static void lv_type_str(Visitor *v, const char *name, char **obj, Error **errp) { const char *str = *obj; lv_print_key(v, name); while (*str) { if (*str == ',') { putchar(','); } putchar(*str++); } } static void lv_complete(Visitor *v, void *opaque) { LegacyPrintVisitor *lv = (LegacyPrintVisitor *) v; assert(lv->path == NULL); } static void lv_free(Visitor *v) { LegacyPrintVisitor *lv = (LegacyPrintVisitor *) v; g_list_free_full(lv->path, g_free); g_free(lv); } static Visitor *legacy_visitor_new(void) { LegacyPrintVisitor *lv = g_malloc0(sizeof(LegacyPrintVisitor)); lv->visitor.start_struct = lv_start_struct; lv->visitor.end_struct = lv_end_struct; /* lists not supported */ lv->visitor.type_int64 = lv_type_int64; lv->visitor.type_uint64 = lv_type_uint64; lv->visitor.type_bool = lv_type_bool; lv->visitor.type_str = lv_type_str; lv->visitor.type = VISITOR_OUTPUT; lv->visitor.complete = lv_complete; lv->visitor.free = lv_free; return &lv->visitor; } void audio_legacy_help(void) { AudiodevListHead head; AudiodevListEntry *e; printf("Environment variable based configuration deprecated.\n"); printf("Please use the new -audiodev option.\n"); head = audio_handle_legacy_opts(); printf("\nEquivalent -audiodev to your current environment variables:\n"); if (!getenv("QEMU_AUDIO_DRV")) { printf("(Since you didn't specify QEMU_AUDIO_DRV, I'll list all " "possibilities)\n"); } QSIMPLEQ_FOREACH(e, &head, next) { Visitor *v; Audiodev *dev = e->dev; printf("-audiodev "); v = legacy_visitor_new(); visit_type_Audiodev(v, NULL, &dev, &error_abort); visit_free(v); printf("\n"); } audio_free_audiodev_list(&head); }