From patchwork Tue Apr 8 07:15:30 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dietmar Maurer X-Patchwork-Id: 14042271 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id A8BCCC3600C for ; Tue, 8 Apr 2025 07:16:52 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1u23BW-0004WG-85; Tue, 08 Apr 2025 03:15:50 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1u23BR-0004Vl-2Y for qemu-devel@nongnu.org; Tue, 08 Apr 2025 03:15:46 -0400 Received: from [94.136.29.99] (helo=zilli.proxmox.com) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1u23BK-0000x7-NX for qemu-devel@nongnu.org; Tue, 08 Apr 2025 03:15:42 -0400 Received: by zilli.proxmox.com (Postfix, from userid 1000) id DBB701C1582; Tue, 8 Apr 2025 09:15:35 +0200 (CEST) From: Dietmar Maurer To: qemu-devel@nongnu.org, marcandre.lureau@redhat.com Cc: Dietmar Maurer Subject: [PATCH 1/3] new configure option to enable gstreamer Date: Tue, 8 Apr 2025 09:15:30 +0200 Message-Id: <20250408071532.2417316-2-dietmar@proxmox.com> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250408071532.2417316-1-dietmar@proxmox.com> References: <20250408071532.2417316-1-dietmar@proxmox.com> MIME-Version: 1.0 X-Host-Lookup-Failed: Reverse DNS lookup failed for 94.136.29.99 (failed) Received-SPF: none client-ip=94.136.29.99; envelope-from=dietmar@zilli.proxmox.com; helo=zilli.proxmox.com X-Spam_score_int: -10 X-Spam_score: -1.1 X-Spam_bar: - X-Spam_report: (-1.1 / 5.0 requ) BAYES_00=-1.9, NO_DNS_FOR_FROM=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org GStreamer is required to implement H264 encoding for VNC. Please note that QEMU already depends on this library when you enable Spice. Signed-off-by: Dietmar Maurer --- meson.build | 10 ++++++++++ meson_options.txt | 2 ++ scripts/meson-buildoptions.sh | 5 ++++- 3 files changed, 16 insertions(+), 1 deletion(-) diff --git a/meson.build b/meson.build index 41f68d3806..28ca37855a 100644 --- a/meson.build +++ b/meson.build @@ -1348,6 +1348,14 @@ if not get_option('zstd').auto() or have_block required: get_option('zstd'), method: 'pkg-config') endif + +gstreamer = not_found +if not get_option('gstreamer').auto() or have_block + gstreamer = dependency('gstreamer-1.0 gstreamer-base-1.0', version: '>=1.22.0', + required: get_option('gstreamer'), + method: 'pkg-config') +endif + qpl = not_found if not get_option('qpl').auto() or have_system qpl = dependency('qpl', version: '>=1.5.0', @@ -2563,6 +2571,7 @@ config_host_data.set('CONFIG_MALLOC_TRIM', has_malloc_trim) config_host_data.set('CONFIG_STATX', has_statx) config_host_data.set('CONFIG_STATX_MNT_ID', has_statx_mnt_id) config_host_data.set('CONFIG_ZSTD', zstd.found()) +config_host_data.set('CONFIG_GSTREAMER', gstreamer.found()) config_host_data.set('CONFIG_QPL', qpl.found()) config_host_data.set('CONFIG_UADK', uadk.found()) config_host_data.set('CONFIG_QATZIP', qatzip.found()) @@ -4836,6 +4845,7 @@ summary_info += {'snappy support': snappy} summary_info += {'bzip2 support': libbzip2} summary_info += {'lzfse support': liblzfse} summary_info += {'zstd support': zstd} +summary_info += {'gstreamer support': gstreamer} summary_info += {'Query Processing Library support': qpl} summary_info += {'UADK Library support': uadk} summary_info += {'qatzip support': qatzip} diff --git a/meson_options.txt b/meson_options.txt index 59d973bca0..11cd132be5 100644 --- a/meson_options.txt +++ b/meson_options.txt @@ -254,6 +254,8 @@ option('vnc_sasl', type : 'feature', value : 'auto', description: 'SASL authentication for VNC server') option('vte', type : 'feature', value : 'auto', description: 'vte support for the gtk UI') +option('gstreamer', type : 'feature', value : 'auto', + description: 'for VNC H.264 encoding with gstreamer') # GTK Clipboard implementation is disabled by default, since it may cause hangs # of the guest VCPUs. See gitlab issue 1150: diff --git a/scripts/meson-buildoptions.sh b/scripts/meson-buildoptions.sh index 3e8e00852b..b0c273d61e 100644 --- a/scripts/meson-buildoptions.sh +++ b/scripts/meson-buildoptions.sh @@ -229,6 +229,7 @@ meson_options_help() { printf "%s\n" ' Xen PCI passthrough support' printf "%s\n" ' xkbcommon xkbcommon support' printf "%s\n" ' zstd zstd compression support' + printf "%s\n" ' gstreamer gstreamer support (H264 for VNC)' } _meson_option_parse() { case $1 in @@ -581,6 +582,8 @@ _meson_option_parse() { --disable-xkbcommon) printf "%s" -Dxkbcommon=disabled ;; --enable-zstd) printf "%s" -Dzstd=enabled ;; --disable-zstd) printf "%s" -Dzstd=disabled ;; - *) return 1 ;; + --enable-gstreamer) printf "%s" -Dgstreamer=enabled ;; + --disable-gstreamer) printf "%s" -Dgstreamer=disabled ;; + *) return 1 ;; esac } From patchwork Tue Apr 8 07:15:31 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dietmar Maurer X-Patchwork-Id: 14042269 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 9CAD1C369A4 for ; Tue, 8 Apr 2025 07:16:35 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1u23BY-0004XO-JV; Tue, 08 Apr 2025 03:15:52 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1u23BW-0004Wv-1I for qemu-devel@nongnu.org; Tue, 08 Apr 2025 03:15:50 -0400 Received: from [94.136.29.99] (helo=zilli.proxmox.com) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1u23BK-0000xA-Lz for qemu-devel@nongnu.org; Tue, 08 Apr 2025 03:15:49 -0400 Received: by zilli.proxmox.com (Postfix, from userid 1000) id DD9041C1592; Tue, 8 Apr 2025 09:15:35 +0200 (CEST) From: Dietmar Maurer To: qemu-devel@nongnu.org, marcandre.lureau@redhat.com Cc: Dietmar Maurer Subject: [PATCH 2/3] add vnc h264 encoder Date: Tue, 8 Apr 2025 09:15:31 +0200 Message-Id: <20250408071532.2417316-3-dietmar@proxmox.com> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250408071532.2417316-1-dietmar@proxmox.com> References: <20250408071532.2417316-1-dietmar@proxmox.com> MIME-Version: 1.0 X-Host-Lookup-Failed: Reverse DNS lookup failed for 94.136.29.99 (failed) Received-SPF: none client-ip=94.136.29.99; envelope-from=dietmar@zilli.proxmox.com; helo=zilli.proxmox.com X-Spam_score_int: -10 X-Spam_score: -1.1 X-Spam_bar: - X-Spam_report: (-1.1 / 5.0 requ) BAYES_00=-1.9, NO_DNS_FOR_FROM=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org This patch implements H264 support for VNC. The RFB protocol extension is defined in: https://github.com/rfbproto/rfbproto/blob/master/rfbproto.rst#open-h-264-encoding Currently the Gstreamer x264enc plugin (software encoder) is used to encode the video stream. The gstreamer pipe is: appsrc -> videoconvert -> x264enc -> appsink Note: videoconvert is required for RGBx to YUV420 conversion. The code still use the VNC server framebuffer change detection, and only encodes and sends video frames if there are changes. Signed-off-by: Dietmar Maurer --- ui/meson.build | 1 + ui/vnc-enc-h264.c | 269 ++++++++++++++++++++++++++++++++++++++++++++++ ui/vnc-jobs.c | 49 ++++++--- ui/vnc.c | 21 ++++ ui/vnc.h | 21 ++++ 5 files changed, 346 insertions(+), 15 deletions(-) create mode 100644 ui/vnc-enc-h264.c diff --git a/ui/meson.build b/ui/meson.build index 35fb04cadf..34f1f33699 100644 --- a/ui/meson.build +++ b/ui/meson.build @@ -46,6 +46,7 @@ vnc_ss.add(files( )) vnc_ss.add(zlib, jpeg) vnc_ss.add(when: sasl, if_true: files('vnc-auth-sasl.c')) +vnc_ss.add(when: gstreamer, if_true: files('vnc-enc-h264.c')) system_ss.add_all(when: [vnc, pixman], if_true: vnc_ss) system_ss.add(when: vnc, if_false: files('vnc-stubs.c')) diff --git a/ui/vnc-enc-h264.c b/ui/vnc-enc-h264.c new file mode 100644 index 0000000000..ca8e206335 --- /dev/null +++ b/ui/vnc-enc-h264.c @@ -0,0 +1,269 @@ +#include "qemu/osdep.h" +#include "vnc.h" + +#include + +static void libavcodec_destroy_encoder_context(VncState *vs) +{ + if (!vs->h264) { + return; + } + + if (vs->h264->source) { + gst_object_unref(vs->h264->source); + vs->h264->source = NULL; + } + + if (vs->h264->convert) { + gst_object_unref(vs->h264->convert); + vs->h264->convert = NULL; + } + + if (vs->h264->gst_encoder) { + gst_object_unref(vs->h264->gst_encoder); + vs->h264->sink = NULL; + } + + if (vs->h264->sink) { + gst_object_unref(vs->h264->sink); + vs->h264->sink = NULL; + } + + if (vs->h264->pipeline) { + gst_object_unref(vs->h264->pipeline); + vs->h264->pipeline = NULL; + } +} + +static bool libavcodec_create_encoder_context(VncState *vs, int w, int h) +{ + g_assert(vs->h264 != NULL); + + if (vs->h264->sink) { + if (w != vs->h264->width || h != vs->h264->height) { + libavcodec_destroy_encoder_context(vs); + } + } + + if (vs->h264->sink) { + return TRUE; + } + + vs->h264->width = w; + vs->h264->height = h; + + vs->h264->source = gst_element_factory_make("appsrc", "source"); + if (!vs->h264->source) { + VNC_DEBUG("Could not create gst source\n"); + libavcodec_destroy_encoder_context(vs); + return FALSE; + } + + vs->h264->convert = gst_element_factory_make("videoconvert", "convert"); + if (!vs->h264->convert) { + VNC_DEBUG("Could not create gst convert element\n"); + libavcodec_destroy_encoder_context(vs); + return FALSE; + } + + vs->h264->gst_encoder = gst_element_factory_make("x264enc", "gst-encoder"); + if (!vs->h264->gst_encoder) { + VNC_DEBUG("Could not create gst x264 encoder\n"); + libavcodec_destroy_encoder_context(vs); + return FALSE; + } + + g_object_set(vs->h264->gst_encoder, "tune", 4, NULL); /* zerolatency */ + /* fix for zerolatency with novnc (without, noVNC displays green stripes) */ + g_object_set(vs->h264->gst_encoder, "threads", 1, NULL); + + g_object_set(vs->h264->gst_encoder, "pass", 5, NULL); /* Constant Quality */ + g_object_set(vs->h264->gst_encoder, "quantizer", 26, NULL); + + /* avoid access unit delimiters (Nal Unit Type 9) - not required */ + g_object_set(vs->h264->gst_encoder, "aud", false, NULL); + + vs->h264->sink = gst_element_factory_make("appsink", "sink"); + if (!vs->h264->sink) { + VNC_DEBUG("Could not create gst sink\n"); + libavcodec_destroy_encoder_context(vs); + return FALSE; + } + + vs->h264->pipeline = gst_pipeline_new("vnc-h264-pipeline"); + if (!vs->h264->pipeline) { + VNC_DEBUG("Could not create gst pipeline\n"); + libavcodec_destroy_encoder_context(vs); + return FALSE; + } + + gst_object_ref(vs->h264->source); + if (!gst_bin_add(GST_BIN(vs->h264->pipeline), vs->h264->source)) { + gst_object_unref(vs->h264->source); + VNC_DEBUG("Could not add source to gst pipeline\n"); + libavcodec_destroy_encoder_context(vs); + return FALSE; + } + + gst_object_ref(vs->h264->convert); + if (!gst_bin_add(GST_BIN(vs->h264->pipeline), vs->h264->convert)) { + gst_object_unref(vs->h264->convert); + VNC_DEBUG("Could not add convert to gst pipeline\n"); + libavcodec_destroy_encoder_context(vs); + return FALSE; + } + + gst_object_ref(vs->h264->gst_encoder); + if (!gst_bin_add(GST_BIN(vs->h264->pipeline), vs->h264->gst_encoder)) { + gst_object_unref(vs->h264->gst_encoder); + VNC_DEBUG("Could not add encoder to gst pipeline\n"); + libavcodec_destroy_encoder_context(vs); + return FALSE; + } + + gst_object_ref(vs->h264->sink); + if (!gst_bin_add(GST_BIN(vs->h264->pipeline), vs->h264->sink)) { + gst_object_unref(vs->h264->sink); + VNC_DEBUG("Could not add sink to gst pipeline\n"); + libavcodec_destroy_encoder_context(vs); + return FALSE; + } + + GstCaps *source_caps = gst_caps_new_simple( + "video/x-raw", + "format", G_TYPE_STRING, "BGRx", + "framerate", GST_TYPE_FRACTION, 33, 1, + "width", G_TYPE_INT, w, + "height", G_TYPE_INT, h, + NULL); + + if (!source_caps) { + VNC_DEBUG("Could not create source caps filter\n"); + libavcodec_destroy_encoder_context(vs); + return FALSE; + } + + g_object_set(vs->h264->source, "caps", source_caps, NULL); + gst_caps_unref(source_caps); + + if (gst_element_link_many( + vs->h264->source, + vs->h264->convert, + vs->h264->gst_encoder, + vs->h264->sink, + NULL + ) != TRUE) { + VNC_DEBUG("Elements could not be linked.\n"); + libavcodec_destroy_encoder_context(vs); + return FALSE; + } + + /* Start playing */ + int ret = gst_element_set_state(vs->h264->pipeline, GST_STATE_PLAYING); + if (ret == GST_STATE_CHANGE_FAILURE) { + VNC_DEBUG("Unable to set the pipeline to the playing state.\n"); + libavcodec_destroy_encoder_context(vs); + return FALSE; + } + + return TRUE; +} + +int vnc_h264_encoder_init(VncState *vs) +{ + g_assert(vs->h264 == NULL); + + vs->h264 = g_malloc0(sizeof(VncH264)); + + return 0; +} + +int vnc_h264_send_framebuffer_update( + VncState *vs, + int _x, + int _y, + int _w, + int _h, +) { + g_assert(vs->h264 != NULL); + g_assert(vs->vd != NULL); + g_assert(vs->vd->server != NULL); + + int width = pixman_image_get_width(vs->vd->server); + int height = pixman_image_get_height(vs->vd->server); + + g_assert(width == vs->client_width); + g_assert(height == vs->client_height); + + int rdb_h264_flags = 0; + + if (vs->h264->sink) { + if (width != vs->h264->width || height != vs->h264->height) { + rdb_h264_flags = 2; + } + } else { + rdb_h264_flags = 2; + } + + if (!libavcodec_create_encoder_context(vs, width, height)) { + VNC_DEBUG("Create encoder context failed\n"); + return -1; + } + + g_assert(vs->h264->sink != NULL); + + uint8_t *src_data_ptr = vnc_server_fb_ptr(vs->vd, 0, 0); + size_t src_data_size = width * height * VNC_SERVER_FB_BYTES; + + GstBuffer *buffer = gst_buffer_new_wrapped_full( + 0, src_data_ptr, src_data_size, 0, src_data_size, NULL, NULL); + + GstFlowReturn ret; + g_signal_emit_by_name(vs->h264->source, "push-buffer", buffer, &ret); + + if (ret != GST_FLOW_OK) { + VNC_DEBUG("gst appsrc push buffer failed\n"); + return -1; + } + + GstSample *sample; + /* Retrieve the buffer */ + g_signal_emit_by_name(vs->h264->sink, "pull-sample", &sample); + if (sample) { + GstBuffer *buf = gst_sample_get_buffer(sample); + GstMapInfo map; + if (gst_buffer_map(buf, &map, 0)) { + vnc_framebuffer_update(vs, 0, 0, width, height, VNC_ENCODING_H264); + vnc_write_s32(vs, map.size); /* write data length */ + vnc_write_s32(vs, rdb_h264_flags); /* write flags */ + rdb_h264_flags = 0; + + VNC_DEBUG("GST vnc_h264_update send %ld\n", map.size); + + vnc_write(vs, map.data, map.size); + + gst_buffer_unmap(buf, &map); + + return 1; + } else { + VNC_DEBUG("unable to map sample\n"); + } + gst_sample_unref(sample); + return 1; + } else { + VNC_DEBUG("gst no data\n"); + return 0; + } +} + +void vnc_h264_clear(VncState *vs) +{ + if (!vs->h264) { + return; + } + + libavcodec_destroy_encoder_context(vs); + + g_free(vs->h264); + vs->h264 = NULL; +} diff --git a/ui/vnc-jobs.c b/ui/vnc-jobs.c index fcca7ec632..853a547d9a 100644 --- a/ui/vnc-jobs.c +++ b/ui/vnc-jobs.c @@ -193,6 +193,7 @@ static void vnc_async_encoding_start(VncState *orig, VncState *local) local->zlib = orig->zlib; local->hextile = orig->hextile; local->zrle = orig->zrle; + local->h264 = orig->h264; local->client_width = orig->client_width; local->client_height = orig->client_height; } @@ -204,6 +205,7 @@ static void vnc_async_encoding_end(VncState *orig, VncState *local) orig->zlib = local->zlib; orig->hextile = local->hextile; orig->zrle = local->zrle; + orig->h264 = local->h264; orig->lossy_rect = local->lossy_rect; } @@ -284,25 +286,42 @@ static int vnc_worker_thread_loop(VncJobQueue *queue) vnc_write_u16(&vs, 0); vnc_lock_display(job->vs->vd); - QLIST_FOREACH_SAFE(entry, &job->rectangles, next, tmp) { - int n; - - if (job->vs->ioc == NULL) { - vnc_unlock_display(job->vs->vd); - /* Copy persistent encoding data */ - vnc_async_encoding_end(job->vs, &vs); - goto disconnected; - } - if (vnc_worker_clamp_rect(&vs, job, &entry->rect)) { - n = vnc_send_framebuffer_update(&vs, entry->rect.x, entry->rect.y, - entry->rect.w, entry->rect.h); + if (vs.vnc_encoding == VNC_ENCODING_H264) { + int width = pixman_image_get_width(vs.vd->server); + int height = pixman_image_get_height(vs.vd->server); + int n = vnc_send_framebuffer_update(&vs, 0, 0, width, height); + if (n >= 0) { + n_rectangles += n; + } + QLIST_FOREACH_SAFE(entry, &job->rectangles, next, tmp) { + g_free(entry); + } + } else { + QLIST_FOREACH_SAFE(entry, &job->rectangles, next, tmp) { + int n; + + if (job->vs->ioc == NULL) { + vnc_unlock_display(job->vs->vd); + /* Copy persistent encoding data */ + vnc_async_encoding_end(job->vs, &vs); + goto disconnected; + } - if (n >= 0) { - n_rectangles += n; + if (vnc_worker_clamp_rect(&vs, job, &entry->rect)) { + n = vnc_send_framebuffer_update( + &vs, + entry->rect.x, + entry->rect.y, + entry->rect.w, + entry->rect.h); + + if (n >= 0) { + n_rectangles += n; + } } + g_free(entry); } - g_free(entry); } trace_vnc_job_nrects(&vs, job, n_rectangles); vnc_unlock_display(job->vs->vd); diff --git a/ui/vnc.c b/ui/vnc.c index 9241caaad9..2e60b55e47 100644 --- a/ui/vnc.c +++ b/ui/vnc.c @@ -972,6 +972,9 @@ int vnc_send_framebuffer_update(VncState *vs, int x, int y, int w, int h) case VNC_ENCODING_ZYWRLE: n = vnc_zywrle_send_framebuffer_update(vs, x, y, w, h); break; + case VNC_ENCODING_H264: + n = vnc_h264_send_framebuffer_update(vs, x, y, w, h); + break; default: vnc_framebuffer_update(vs, x, y, w, h, VNC_ENCODING_RAW); n = vnc_raw_send_framebuffer_update(vs, x, y, w, h); @@ -1326,6 +1329,10 @@ void vnc_disconnect_finish(VncState *vs) vnc_tight_clear(vs); vnc_zrle_clear(vs); +#ifdef CONFIG_GSTREAMER + vnc_h264_clear(vs); +#endif + #ifdef CONFIG_VNC_SASL vnc_sasl_client_cleanup(vs); #endif /* CONFIG_VNC_SASL */ @@ -2181,6 +2188,16 @@ static void set_encodings(VncState *vs, int32_t *encodings, size_t n_encodings) vnc_set_feature(vs, VNC_FEATURE_ZYWRLE); vs->vnc_encoding = enc; break; +#ifdef CONFIG_GSTREAMER + case VNC_ENCODING_H264: + if (vnc_h264_encoder_init(vs) == 0) { + vnc_set_feature(vs, VNC_FEATURE_H264); + vs->vnc_encoding = enc; + } else { + VNC_DEBUG("vnc_h264_encoder_init failed\n"); + } + break; +#endif case VNC_ENCODING_DESKTOPRESIZE: vnc_set_feature(vs, VNC_FEATURE_RESIZE); break; @@ -4291,6 +4308,10 @@ int vnc_init_func(void *opaque, QemuOpts *opts, Error **errp) Error *local_err = NULL; char *id = (char *)qemu_opts_id(opts); +#ifdef CONFIG_GSTREAMER + gst_init(NULL, NULL); +#endif + assert(id); vnc_display_init(id, &local_err); if (local_err) { diff --git a/ui/vnc.h b/ui/vnc.h index acc53a2cc1..7e232f7dac 100644 --- a/ui/vnc.h +++ b/ui/vnc.h @@ -46,6 +46,10 @@ #include "vnc-enc-zrle.h" #include "ui/kbd-state.h" +#ifdef CONFIG_GSTREAMER +#include +#endif + // #define _VNC_DEBUG 1 #ifdef _VNC_DEBUG @@ -231,6 +235,14 @@ typedef struct VncZywrle { int buf[VNC_ZRLE_TILE_WIDTH * VNC_ZRLE_TILE_HEIGHT]; } VncZywrle; +#ifdef CONFIG_GSTREAMER +typedef struct VncH264 { + GstElement *pipeline, *source, *gst_encoder, *sink, *convert; + size_t width; + size_t height; +} VncH264; +#endif + struct VncRect { int x; @@ -344,6 +356,9 @@ struct VncState VncHextile hextile; VncZrle *zrle; VncZywrle zywrle; +#ifdef CONFIG_GSTREAMER + VncH264 *h264; +#endif Notifier mouse_mode_notifier; @@ -404,6 +419,7 @@ enum { #define VNC_ENCODING_TRLE 0x0000000f #define VNC_ENCODING_ZRLE 0x00000010 #define VNC_ENCODING_ZYWRLE 0x00000011 +#define VNC_ENCODING_H264 0x00000032 /* 50 */ #define VNC_ENCODING_COMPRESSLEVEL0 0xFFFFFF00 /* -256 */ #define VNC_ENCODING_QUALITYLEVEL0 0xFFFFFFE0 /* -32 */ #define VNC_ENCODING_XCURSOR 0xFFFFFF10 /* -240 */ @@ -464,6 +480,7 @@ enum VncFeatures { VNC_FEATURE_XVP, VNC_FEATURE_CLIPBOARD_EXT, VNC_FEATURE_AUDIO, + VNC_FEATURE_H264, }; @@ -625,6 +642,10 @@ int vnc_zrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); int vnc_zywrle_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); void vnc_zrle_clear(VncState *vs); +int vnc_h264_encoder_init(VncState *vs); +int vnc_h264_send_framebuffer_update(VncState *vs, int x, int y, int w, int h); +void vnc_h264_clear(VncState *vs); + /* vnc-clipboard.c */ void vnc_server_cut_text_caps(VncState *vs); void vnc_client_cut_text(VncState *vs, size_t len, uint8_t *text); From patchwork Tue Apr 8 07:15:32 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dietmar Maurer X-Patchwork-Id: 14042270 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id E6EF7C3600C for ; Tue, 8 Apr 2025 07:16:35 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1u23BV-0004WH-T3; Tue, 08 Apr 2025 03:15:50 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1u23BR-0004Vk-2Q for qemu-devel@nongnu.org; Tue, 08 Apr 2025 03:15:46 -0400 Received: from [94.136.29.99] (helo=zilli.proxmox.com) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1u23BK-0000x8-Le for qemu-devel@nongnu.org; Tue, 08 Apr 2025 03:15:42 -0400 Received: by zilli.proxmox.com (Postfix, from userid 1000) id DF5EC1C159B; Tue, 8 Apr 2025 09:15:35 +0200 (CEST) From: Dietmar Maurer To: qemu-devel@nongnu.org, marcandre.lureau@redhat.com Cc: Dietmar Maurer Subject: [PATCH 3/3] vnc: h264: send additional frames after the display is clean Date: Tue, 8 Apr 2025 09:15:32 +0200 Message-Id: <20250408071532.2417316-4-dietmar@proxmox.com> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250408071532.2417316-1-dietmar@proxmox.com> References: <20250408071532.2417316-1-dietmar@proxmox.com> MIME-Version: 1.0 X-Host-Lookup-Failed: Reverse DNS lookup failed for 94.136.29.99 (failed) Received-SPF: none client-ip=94.136.29.99; envelope-from=dietmar@zilli.proxmox.com; helo=zilli.proxmox.com X-Spam_score_int: -10 X-Spam_score: -1.1 X-Spam_bar: - X-Spam_report: (-1.1 / 5.0 requ) BAYES_00=-1.9, NO_DNS_FOR_FROM=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org The H264 implementation only sends frames when it detects changes in the server's framebuffer. This leads to artifacts when there are no further changes, as the internal H264 encoder may still contain data. This patch modifies the code to send a few additional frames in such situations to flush the H264 encoder data. Signed-off-by: Dietmar Maurer --- ui/vnc.c | 25 ++++++++++++++++++++++++- ui/vnc.h | 3 +++ 2 files changed, 27 insertions(+), 1 deletion(-) diff --git a/ui/vnc.c b/ui/vnc.c index 2e60b55e47..4ba0b715fd 100644 --- a/ui/vnc.c +++ b/ui/vnc.c @@ -3239,7 +3239,30 @@ static void vnc_refresh(DisplayChangeListener *dcl) vnc_unlock_display(vd); QTAILQ_FOREACH_SAFE(vs, &vd->clients, next, vn) { - rects += vnc_update_client(vs, has_dirty); + int client_dirty = has_dirty; + if (vs->h264) { + if (client_dirty) { + vs->h264->keep_dirty = VNC_H264_KEEP_DIRTY; + } else { + if (vs->h264->keep_dirty > 0) { + client_dirty = 1; + vs->h264->keep_dirty--; + } + } + } + + int count = vnc_update_client(vs, client_dirty); + rects += count; + + if (vs->h264 && !count && vs->h264->keep_dirty) { + VncJob *job = vnc_job_new(vs); + int height = pixman_image_get_height(vd->server); + int width = pixman_image_get_width(vd->server); + vs->job_update = vs->update; + vs->update = VNC_STATE_UPDATE_NONE; + vnc_job_add_rect(job, 0, 0, width, height); + vnc_job_push(job); + } /* vs might be free()ed here */ } diff --git a/ui/vnc.h b/ui/vnc.h index 7e232f7dac..e1b81d6bcc 100644 --- a/ui/vnc.h +++ b/ui/vnc.h @@ -236,10 +236,13 @@ typedef struct VncZywrle { } VncZywrle; #ifdef CONFIG_GSTREAMER +/* Number of frames we send after the display is clean. */ +#define VNC_H264_KEEP_DIRTY 10 typedef struct VncH264 { GstElement *pipeline, *source, *gst_encoder, *sink, *convert; size_t width; size_t height; + guint keep_dirty; } VncH264; #endif