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[PATCH v3 03/15] audio: add function audio_pcm_hw_conv_in()
From: |
Volker Rümelin |
Subject: |
[PATCH v3 03/15] audio: add function audio_pcm_hw_conv_in() |
Date: |
Tue, 1 Mar 2022 20:12:59 +0100 |
Add a function audio_pcm_hw_conv_in() similar to the existing
counterpart function audio_pcm_hw_clip_out(). This function reduces
the number of calls to the pcm_ops functions get_buffer_in() and
put_buffer_in(). That's one less call to get_buffer_in() and
put_buffer_in() every time the conv_buffer wraps around.
Signed-off-by: Volker Rümelin <vr_qemu@t-online.de>
---
audio/audio.c | 25 +++++++++++++++++++------
1 file changed, 19 insertions(+), 6 deletions(-)
diff --git a/audio/audio.c b/audio/audio.c
index dfd32912da..f28e91853f 100644
--- a/audio/audio.c
+++ b/audio/audio.c
@@ -548,6 +548,24 @@ static size_t audio_pcm_hw_get_live_in(HWVoiceIn *hw)
return live;
}
+static size_t audio_pcm_hw_conv_in(HWVoiceIn *hw, void *pcm_buf, size_t
samples)
+{
+ size_t conv = 0;
+ STSampleBuffer *conv_buf = hw->conv_buf;
+
+ while (samples) {
+ uint8_t *src = advance(pcm_buf, conv * hw->info.bytes_per_frame);
+ size_t proc = MIN(samples, conv_buf->size - conv_buf->pos);
+
+ hw->conv(conv_buf->samples + conv_buf->pos, src, proc);
+ conv_buf->pos = (conv_buf->pos + proc) % conv_buf->size;
+ samples -= proc;
+ conv += proc;
+ }
+
+ return conv;
+}
+
/*
* Soft voice (capture)
*/
@@ -1219,7 +1237,6 @@ static void audio_run_out (AudioState *s)
static size_t audio_pcm_hw_run_in(HWVoiceIn *hw, size_t samples)
{
size_t conv = 0;
- STSampleBuffer *conv_buf = hw->conv_buf;
if (hw->pcm_ops->run_buffer_in) {
hw->pcm_ops->run_buffer_in(hw);
@@ -1235,11 +1252,7 @@ static size_t audio_pcm_hw_run_in(HWVoiceIn *hw, size_t
samples)
break;
}
- proc = MIN(size / hw->info.bytes_per_frame,
- conv_buf->size - conv_buf->pos);
-
- hw->conv(conv_buf->samples + conv_buf->pos, buf, proc);
- conv_buf->pos = (conv_buf->pos + proc) % conv_buf->size;
+ proc = audio_pcm_hw_conv_in(hw, buf, size / hw->info.bytes_per_frame);
samples -= proc;
conv += proc;
--
2.34.1
- [PATCH v3 00/15] reduce audio playback latency, Volker Rümelin, 2022/03/01
- [PATCH v3 01/15] audio: replace open-coded buffer arithmetic, Volker Rümelin, 2022/03/01
- [PATCH v3 02/15] audio: move function audio_pcm_hw_clip_out(), Volker Rümelin, 2022/03/01
- [PATCH v3 03/15] audio: add function audio_pcm_hw_conv_in(),
Volker Rümelin <=
- [PATCH v3 05/15] paaudio: increase default latency to 46ms, Volker Rümelin, 2022/03/01
- [PATCH v3 07/15] audio: copy playback stream in sequential order, Volker Rümelin, 2022/03/01
- [PATCH v3 06/15] jackaudio: use more jack audio buffers, Volker Rümelin, 2022/03/01
- [PATCH v3 04/15] audio: inline function audio_pcm_sw_get_rpos_in(), Volker Rümelin, 2022/03/01
- [PATCH v3 08/15] audio: add pcm_ops function table for capture backend, Volker Rümelin, 2022/03/01
- [PATCH v3 09/15] Revert "audio: fix wavcapture segfault", Volker Rümelin, 2022/03/01
- [PATCH v3 14/15] paaudio: fix samples vs. frames mix-up, Volker Rümelin, 2022/03/01
- [PATCH v3 13/15] ossaudio: reduce effective playback buffer size, Volker Rümelin, 2022/03/01