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[Qemu-devel] [PATCH v2 50/52] usb-audio: do not count on avail bytes act
From: |
Kővágó, Zoltán |
Subject: |
[Qemu-devel] [PATCH v2 50/52] usb-audio: do not count on avail bytes actually available |
Date: |
Sun, 23 Dec 2018 21:52:26 +0100 |
This assumption is no longer true when mixeng is turned off.
Signed-off-by: Kővágó, Zoltán <address@hidden>
---
hw/usb/dev-audio.c | 30 ++++++++++++++++++------------
1 file changed, 18 insertions(+), 12 deletions(-)
diff --git a/hw/usb/dev-audio.c b/hw/usb/dev-audio.c
index 589977d96c..510585ad7a 100644
--- a/hw/usb/dev-audio.c
+++ b/hw/usb/dev-audio.c
@@ -318,27 +318,28 @@ static int streambuf_put(struct streambuf *buf, USBPacket
*p)
{
uint32_t free = buf->size - (buf->prod - buf->cons);
- if (!free) {
+ if (free < USBAUDIO_PACKET_SIZE) {
return 0;
}
- assert(free >= USBAUDIO_PACKET_SIZE);
+
usb_packet_copy(p, buf->data + (buf->prod % buf->size),
USBAUDIO_PACKET_SIZE);
buf->prod += USBAUDIO_PACKET_SIZE;
return USBAUDIO_PACKET_SIZE;
}
-static uint8_t *streambuf_get(struct streambuf *buf)
+static uint8_t *streambuf_get(struct streambuf *buf, size_t *len)
{
uint32_t used = buf->prod - buf->cons;
uint8_t *data;
if (!used) {
+ *len = 0;
return NULL;
}
- assert(used >= USBAUDIO_PACKET_SIZE);
data = buf->data + (buf->cons % buf->size);
- buf->cons += USBAUDIO_PACKET_SIZE;
+ *len = MIN(buf->prod - buf->cons,
+ buf->size - (buf->cons % buf->size));
return data;
}
@@ -370,16 +371,21 @@ static void output_callback(void *opaque, int avail)
USBAudioState *s = opaque;
uint8_t *data;
- for (;;) {
- if (avail < USBAUDIO_PACKET_SIZE) {
- return;
- }
- data = streambuf_get(&s->out.buf);
+ while (avail) {
+ size_t written, len;
+
+ data = streambuf_get(&s->out.buf, &len);
if (!data) {
return;
}
- AUD_write(s->out.voice, data, USBAUDIO_PACKET_SIZE);
- avail -= USBAUDIO_PACKET_SIZE;
+
+ written = AUD_write(s->out.voice, data, len);
+ avail -= written;
+ s->out.buf.cons += written;
+
+ if (written < len) {
+ return;
+ }
}
}
--
2.20.1
- [Qemu-devel] [PATCH v2 48/52] audio: basic support for multichannel audio, (continued)
- [Qemu-devel] [PATCH v2 48/52] audio: basic support for multichannel audio, Kővágó, Zoltán, 2018/12/23
- [Qemu-devel] [PATCH v2 37/52] wavaudio: port to the new audio backend api, Kővágó, Zoltán, 2018/12/23
- [Qemu-devel] [PATCH v2 35/52] sdlaudio: port to the new audio backend api, Kővágó, Zoltán, 2018/12/23
- [Qemu-devel] [PATCH v2 38/52] audio: remove remains of the old backend api, Kővágó, Zoltán, 2018/12/23
- [Qemu-devel] [PATCH v2 41/52] audio: common rate control code for timer based outputs, Kővágó, Zoltán, 2018/12/23
- [Qemu-devel] [PATCH v2 29/52] alsaaudio: port to the new audio backend api, Kővágó, Zoltán, 2018/12/23
- [Qemu-devel] [PATCH v2 34/52] paaudio: port to the new audio backend api, Kővágó, Zoltán, 2018/12/23
- [Qemu-devel] [PATCH v2 42/52] audio: split ctl_* functions into enable_* and volume_*, Kővágó, Zoltán, 2018/12/23
- [Qemu-devel] [PATCH v2 47/52] audio: replace shift in audio_pcm_info with bytes_per_frame, Kővágó, Zoltán, 2018/12/23
- [Qemu-devel] [PATCH v2 43/52] audio: add mixeng option (documentation), Kővágó, Zoltán, 2018/12/23
- [Qemu-devel] [PATCH v2 50/52] usb-audio: do not count on avail bytes actually available,
Kővágó, Zoltán <=
- [Qemu-devel] [PATCH v2 49/52] paaudio: channel-map option, Kővágó, Zoltán, 2018/12/23
- [Qemu-devel] [PATCH v2 52/52] usbaudio: change playback counters to 64 bit, Kővágó, Zoltán, 2018/12/23
- Re: [Qemu-devel] [PATCH v2 00/52] Audio 5.1 patches, Philippe Mathieu-Daudé, 2018/12/25
- Re: [Qemu-devel] [PATCH v2 00/52] Audio 5.1 patches, Programmingkid, 2018/12/26