audio: Add functions to initialize buffers
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>
Akihiko Odaki committed
Mar 4, 2026 at 15:16 UTC
c3492514c7cc9a527c9a2df39f00c417e1f97115
2 files changed
+20
-6
audio/audio-mixeng-be.c
+18
-6
@@ -1187,14 +1187,20 @@ void audio_run(AudioMixengBackend *s, const char *msg)
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}
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}
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+void audio_generic_initialize_buffer_in(HWVoiceIn *hw)
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+{
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+ g_free(hw->buf_emul);
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+ hw->size_emul = hw->samples * hw->info.bytes_per_frame;
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+ hw->buf_emul = g_malloc(hw->size_emul);
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+ hw->pos_emul = hw->pending_emul = 0;
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+}
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+
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void audio_generic_run_buffer_in(HWVoiceIn *hw)
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{
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AudioMixengBackendClass *k = AUDIO_MIXENG_BACKEND_GET_CLASS(hw->s);
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if (unlikely(!hw->buf_emul)) {
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- hw->size_emul = hw->samples * hw->info.bytes_per_frame;
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- hw->buf_emul = g_malloc(hw->size_emul);
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- hw->pos_emul = hw->pending_emul = 0;
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+ audio_generic_initialize_buffer_in(hw);
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}
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while (hw->pending_emul < hw->size_emul) {
@@ -1227,6 +1233,14 @@ void audio_generic_put_buffer_in(HWVoiceIn *hw, void *buf, size_t size)
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hw->pending_emul -= size;
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}
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+void audio_generic_initialize_buffer_out(HWVoiceOut *hw)
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+{
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+ g_free(hw->buf_emul);
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+ hw->size_emul = hw->samples * hw->info.bytes_per_frame;
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+ hw->buf_emul = g_malloc(hw->size_emul);
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+ hw->pos_emul = hw->pending_emul = 0;
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+}
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+
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size_t audio_generic_buffer_get_free(HWVoiceOut *hw)
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{
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if (hw->buf_emul) {
@@ -1260,9 +1274,7 @@ void audio_generic_run_buffer_out(HWVoiceOut *hw)
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void *audio_generic_get_buffer_out(HWVoiceOut *hw, size_t *size)
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{
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if (unlikely(!hw->buf_emul)) {
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- hw->size_emul = hw->samples * hw->info.bytes_per_frame;
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- hw->buf_emul = g_malloc(hw->size_emul);
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- hw->pos_emul = hw->pending_emul = 0;
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+ audio_generic_initialize_buffer_out(hw);
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}
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*size = MIN(hw->size_emul - hw->pending_emul,
audio/audio_int.h
+2
@@ -141,9 +141,11 @@ static inline void *advance(void *p, size_t incr)
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int wav_start_capture(AudioBackend *state, CaptureState *s, const char *path,
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int freq, int bits, int nchannels);
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+void audio_generic_initialize_buffer_in(HWVoiceIn *hw);
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void audio_generic_run_buffer_in(HWVoiceIn *hw);
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void *audio_generic_get_buffer_in(HWVoiceIn *hw, size_t *size);
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void audio_generic_put_buffer_in(HWVoiceIn *hw, void *buf, size_t size);
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+void audio_generic_initialize_buffer_out(HWVoiceOut *hw);
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void audio_generic_run_buffer_out(HWVoiceOut *hw);
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size_t audio_generic_buffer_get_free(HWVoiceOut *hw);
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void *audio_generic_get_buffer_out(HWVoiceOut *hw, size_t *size);