audio: unify input and output mixeng buffer management

Usage notes: hw->samples became hw->{mix,conv}_buf->size, except before
initialization (audio_pcm_hw_alloc_resources_*), hw->samples gives the
initial size of the STSampleBuffer.  The next commit tries to fix this
inconsistency.

Signed-off-by: Kővágó, Zoltán <DirtY.iCE.hu@gmail.com>
Message-id: a78caeb2eeb6348ecb45bb2c81709570ef8ac5b3.1568927990.git.DirtY.iCE.hu@gmail.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

1 files changed, 7 insertions, 5 deletions

diff --git a/audio/audio_int.h b/audio/audio_int.h
index c76d7c39e8..20021df9e8 100644
--- a/audio/audio_int.h
+++ b/audio/audio_int.h
@@ -52,6 +52,11 @@ struct audio_pcm_info {
 typedef struct AudioState AudioState;
 typedef struct SWVoiceCap SWVoiceCap;
 
+typedef struct STSampleBuffer {
+    size_t pos, size;
+    st_sample samples[];
+} STSampleBuffer;
+
 typedef struct HWVoiceOut {
     AudioState *s;
     int enabled;
@@ -60,11 +65,9 @@ typedef struct HWVoiceOut {
     struct audio_pcm_info info;
 
     f_sample *clip;
-
-    size_t rpos;
     uint64_t ts_helper;
 
-    struct st_sample *mix_buf;
+    STSampleBuffer *mix_buf;
     void *buf_emul;
     size_t pos_emul, pending_emul, size_emul;
 
@@ -84,11 +87,10 @@ typedef struct HWVoiceIn {
 
     t_sample *conv;
 
-    size_t wpos;
     size_t total_samples_captured;
     uint64_t ts_helper;
 
-    struct st_sample *conv_buf;
+    STSampleBuffer *conv_buf;
     void *buf_emul;
     size_t pos_emul, pending_emul, size_emul;