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bh=cnSTnTrhv6Es+jAHFfSChZVlDhkfCwsAKM+1T7vyOHY=; b=dm9mPrDJ1+U3gsybeWO2y7BUn6aQHhc0DpiYjDcexoaEK5sVbYn93MNFqMx1ZDXm7Rr8Hh /zaYO0ICC8+ctCDOkPqdLWhKeWNYZB0EhHyVHgSQ4dNGuqYZ3vda2Z3NDoRQQSrysinmvW 7g8+SN8uumVzs6TZFg6YQ95nISdRPic= X-MC-Unique: H6vZys00Nkuuf8Iqdwaajg-1 From: Gerd Hoffmann To: qemu-devel@nongnu.org Subject: [PULL 6/9] audio: align audio_generic_write with audio_pcm_hw_run_out Date: Wed, 23 Sep 2020 11:09:58 +0200 Message-Id: <20200923091001.20814-7-kraxel@redhat.com> In-Reply-To: <20200923091001.20814-1-kraxel@redhat.com> References: <20200923091001.20814-1-kraxel@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kraxel@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=63.128.21.124; envelope-from=kraxel@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/23 00:53:58 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -35 X-Spam_score: -3.6 X-Spam_bar: --- X-Spam_report: (-3.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.455, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action 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: =?UTF-8?q?Volker=20R=C3=BCmelin?= , Gerd Hoffmann Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) From: Volker R=C3=BCmelin The function audio_generic_write should work exactly like audio_pcm_hw_run_out. It's a very similar function working on a different buffer. This patch significantly reduces the number of drop-outs with the DirectSound backend. To hear the difference start qemu with -audiodev dsound,id=3Daudio0,out.mixing-engine=3Doff and play a song in the guest with and without this patch. Signed-off-by: Volker R=C3=BCmelin Message-id: 20200920171729.15861-6-vr_qemu@t-online.de Signed-off-by: Gerd Hoffmann --- audio/audio.c | 32 +++++++++++++++++++++++++++----- 1 file changed, 27 insertions(+), 5 deletions(-) diff --git a/audio/audio.c b/audio/audio.c index 341edc4d0012..8587e3d15225 100644 --- a/audio/audio.c +++ b/audio/audio.c @@ -1484,12 +1484,34 @@ size_t audio_generic_put_buffer_out(HWVoiceOut *hw,= void *buf, size_t size) =20 size_t audio_generic_write(HWVoiceOut *hw, void *buf, size_t size) { - size_t dst_size, copy_size; - void *dst =3D hw->pcm_ops->get_buffer_out(hw, &dst_size); - copy_size =3D MIN(size, dst_size); + size_t total =3D 0; =20 - memcpy(dst, buf, copy_size); - return hw->pcm_ops->put_buffer_out(hw, dst, copy_size); + while (total < size) { + size_t dst_size =3D size - total; + size_t copy_size, proc; + void *dst =3D hw->pcm_ops->get_buffer_out(hw, &dst_size); + + if (dst_size =3D=3D 0) { + break; + } + + copy_size =3D MIN(size - total, dst_size); + if (dst) { + memcpy(dst, (char *)buf + total, copy_size); + } + proc =3D hw->pcm_ops->put_buffer_out(hw, dst, copy_size); + total +=3D proc; + + if (proc =3D=3D 0 || proc < copy_size) { + break; + } + } + + if (hw->pcm_ops->run_buffer_out) { + hw->pcm_ops->run_buffer_out(hw); + } + + return total; } =20 size_t audio_generic_read(HWVoiceIn *hw, void *buf, size_t size) --=20 2.27.0