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author | Kővágó, Zoltán <dirty.ice.hu@gmail.com> | 2019-03-08 23:34:15 +0100 |
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committer | Gerd Hoffmann <kraxel@redhat.com> | 2019-03-11 10:29:27 +0100 |
commit | 71830221fb23388b32e6516c2fb7a698453a6c5a (patch) | |
tree | f10b78c8eac3ca884923a35406fd2be2105d531b /audio/audio_legacy.c | |
parent | f0b3d8115298c3162d3a56f8f38e0a02e783b54b (diff) | |
download | qemu-71830221fb23388b32e6516c2fb7a698453a6c5a.zip qemu-71830221fb23388b32e6516c2fb7a698453a6c5a.tar.gz qemu-71830221fb23388b32e6516c2fb7a698453a6c5a.tar.bz2 |
audio: -audiodev command line option basic implementation
Audio drivers now get an Audiodev * as config paramters, instead of the
global audio_option structs. There is some code in audio/audio_legacy.c
that converts the old environment variables to audiodev options (this
way backends do not have to worry about legacy options). It also
contains a replacement of -audio-help, which prints out the equivalent
-audiodev based config of the currently specified environment variables.
Note that backends are not updated and still rely on environment
variables.
Also note that (due to moving try-poll from global to backend specific
option) currently ALSA and OSS will always try poll mode, regardless of
environment variables or -audiodev options.
Signed-off-by: Kővágó, Zoltán <DirtY.iCE.hu@gmail.com>
Message-id: e99a7cbdac0d13512743880660b2032024703e4c.1552083282.git.DirtY.iCE.hu@gmail.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'audio/audio_legacy.c')
-rw-r--r-- | audio/audio_legacy.c | 293 |
1 files changed, 293 insertions, 0 deletions
diff --git a/audio/audio_legacy.c b/audio/audio_legacy.c new file mode 100644 index 0000000..ad3b781 --- /dev/null +++ b/audio/audio_legacy.c @@ -0,0 +1,293 @@ +/* + * 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-common.h" +#include "qemu/cutils.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_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); + } +} + +/* backend specific functions */ +/* todo */ + +/* 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_"); + + get_int("QEMU_AUDIO_TIMER_PERIOD", + &e->dev->timer_period, &e->dev->has_timer_period); + + 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); +} |