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audio: Add functions to initialize buffers

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These functions can be used to re-initialize buffers when hardware
parameters change due to device hotplug, for example.

Signed-off-by: Akihiko Odaki <odaki@rsg.ci.i.u-tokyo.ac.jp>
Reviewed-by: Phil Dennis-Jordan <phil@philjordan.eu>
Reviewed-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20260304-coreaudio-v8-5-bf1d40731e73@rsg.ci.i.u-tokyo.ac.jp>
This commit is contained in:
Akihiko Odaki
2026-03-04 15:16:58 +09:00
committed by Marc-André Lureau
parent f47a5a3d47
commit c3492514c7
2 changed files with 20 additions and 6 deletions
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24
audio/audio-mixeng-be.c
View File

@@ -1187,14 +1187,20 @@ void audio_run(AudioMixengBackend *s, const char *msg)
}
}
void audio_generic_initialize_buffer_in(HWVoiceIn *hw)
{
g_free(hw->buf_emul);
hw->size_emul = hw->samples * hw->info.bytes_per_frame;
hw->buf_emul = g_malloc(hw->size_emul);
hw->pos_emul = hw->pending_emul = 0;
}
void audio_generic_run_buffer_in(HWVoiceIn *hw)
{
AudioMixengBackendClass *k = AUDIO_MIXENG_BACKEND_GET_CLASS(hw->s);
if (unlikely(!hw->buf_emul)) {
hw->size_emul = hw->samples * hw->info.bytes_per_frame;
hw->buf_emul = g_malloc(hw->size_emul);
hw->pos_emul = hw->pending_emul = 0;
audio_generic_initialize_buffer_in(hw);
}
while (hw->pending_emul < hw->size_emul) {
@@ -1227,6 +1233,14 @@ void audio_generic_put_buffer_in(HWVoiceIn *hw, void *buf, size_t size)
hw->pending_emul -= size;
}
void audio_generic_initialize_buffer_out(HWVoiceOut *hw)
{
g_free(hw->buf_emul);
hw->size_emul = hw->samples * hw->info.bytes_per_frame;
hw->buf_emul = g_malloc(hw->size_emul);
hw->pos_emul = hw->pending_emul = 0;
}
size_t audio_generic_buffer_get_free(HWVoiceOut *hw)
{
if (hw->buf_emul) {
@@ -1260,9 +1274,7 @@ void audio_generic_run_buffer_out(HWVoiceOut *hw)
void *audio_generic_get_buffer_out(HWVoiceOut *hw, size_t *size)
{
if (unlikely(!hw->buf_emul)) {
hw->size_emul = hw->samples * hw->info.bytes_per_frame;
hw->buf_emul = g_malloc(hw->size_emul);
hw->pos_emul = hw->pending_emul = 0;
audio_generic_initialize_buffer_out(hw);
}
*size = MIN(hw->size_emul - hw->pending_emul,

2
audio/audio_int.h
View File

@@ -141,9 +141,11 @@ static inline void *advance(void *p, size_t incr)
int wav_start_capture(AudioBackend *state, CaptureState *s, const char *path,
int freq, int bits, int nchannels);
void audio_generic_initialize_buffer_in(HWVoiceIn *hw);
void audio_generic_run_buffer_in(HWVoiceIn *hw);
void *audio_generic_get_buffer_in(HWVoiceIn *hw, size_t *size);
void audio_generic_put_buffer_in(HWVoiceIn *hw, void *buf, size_t size);
void audio_generic_initialize_buffer_out(HWVoiceOut *hw);
void audio_generic_run_buffer_out(HWVoiceOut *hw);
size_t audio_generic_buffer_get_free(HWVoiceOut *hw);
void *audio_generic_get_buffer_out(HWVoiceOut *hw, size_t *size);