diff options
Diffstat (limited to 'audio/audio_legacy.c')
| -rw-r--r-- | audio/audio_legacy.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/audio/audio_legacy.c b/audio/audio_legacy.c index 5f557a2de9..bf326bd360 100644 --- a/audio/audio_legacy.c +++ b/audio/audio_legacy.c @@ -120,6 +120,30 @@ static void get_frames_to_usecs(const char *env, uint32_t *dst, bool *has_dst, } } +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 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( @@ -180,6 +204,21 @@ static void handle_coreaudio(Audiodev *dev) &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); +} + /* general */ static void handle_per_direction( AudiodevPerDirectionOptions *pdo, const char *prefix) @@ -229,6 +268,10 @@ static AudiodevListEntry *legacy_opt(const char *drvname) handle_coreaudio(e->dev); break; + case AUDIODEV_DRIVER_DSOUND: + handle_dsound(e->dev); + break; + default: break; } |