From patchwork Thu Sep 19 08:36:25 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Gerd Hoffmann X-Patchwork-Id: 11151897 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6C4F01745 for ; Thu, 19 Sep 2019 08:55:18 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 4ADED21907 for ; Thu, 19 Sep 2019 08:55:18 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4ADED21907 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:40360 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iAsDc-0002Fp-KB for patchwork-qemu-devel@patchwork.kernel.org; Thu, 19 Sep 2019 04:55:16 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:35828) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iArvj-00058p-Vu for qemu-devel@nongnu.org; Thu, 19 Sep 2019 04:36:50 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iArve-0000G4-RT for qemu-devel@nongnu.org; Thu, 19 Sep 2019 04:36:47 -0400 Received: from mx1.redhat.com ([209.132.183.28]:59976) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iArve-0000E3-Bq for qemu-devel@nongnu.org; Thu, 19 Sep 2019 04:36:42 -0400 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 369253C928; Thu, 19 Sep 2019 08:36:41 +0000 (UTC) Received: from sirius.home.kraxel.org (ovpn-116-47.ams2.redhat.com [10.36.116.47]) by smtp.corp.redhat.com (Postfix) with ESMTP id D68671001947; Thu, 19 Sep 2019 08:36:40 +0000 (UTC) Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id 7D9BB1747D; Thu, 19 Sep 2019 10:36:30 +0200 (CEST) From: Gerd Hoffmann To: qemu-devel@nongnu.org Date: Thu, 19 Sep 2019 10:36:25 +0200 Message-Id: <20190919083629.29998-23-kraxel@redhat.com> In-Reply-To: <20190919083629.29998-1-kraxel@redhat.com> References: <20190919083629.29998-1-kraxel@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.39]); Thu, 19 Sep 2019 08:36:41 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 22/26] usb-audio: do not count on avail bytes actually available X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?unknown-8bit?b?S8WRdsOhZ8OzQHJlZGhhdC5jb20sID0/VVRGLTg/cT9ab2x0PUMz?= =?unknown-8bit?b?PUExbj89IDxEaXJ0WS5pQ0UuaHVAZ21haWwuY29tPiwgR2VyZCBIb2Zm?= =?unknown-8bit?b?bWFubiA8a3JheGVsQHJlZGhhdC5jb20+LCBNYXJrdXMgQXJtYnJ1c3Rl?= =?unknown-8bit?b?ciA8YXJtYnJ1QHJlZGhhdC5jb20+?= Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" From: Kővágó, Zoltán This assumption is no longer true when mixeng is turned off. Signed-off-by: Kővágó, Zoltán Message-id: 90b5ec62109a69ee7c28d95b367e40dc41ad658a.1568574965.git.DirtY.iCE.hu@gmail.com Signed-off-by: Gerd Hoffmann --- 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 ae42e5a2f1d0..74c99b1f1204 100644 --- a/hw/usb/dev-audio.c +++ b/hw/usb/dev-audio.c @@ -319,30 +319,31 @@ 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; } if (p->iov.size != 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; } @@ -374,16 +375,21 @@ 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; + } } }