added vpp delay

added video postprocessor delay

refers to GH-370

configure.ac

@@ -3366,6 +3366,7 @@ if test "$build_default" != no; then
         src/vo_postprocess/border.o
         src/vo_postprocess/crop.o
         src/vo_postprocess/deinterlace.o
+        src/vo_postprocess/delay.o
         src/vo_postprocess/interlace.o
         src/vo_postprocess/split.o
         src/vo_postprocess/temporal-deint.o

src/types.h

@@ -66,6 +66,7 @@ typedef enum {
         VIDEO_CODEC_NONE = 0, ///< dummy color spec
         VC_NONE          = VIDEO_CODEC_NONE, // shortcut
         VIDEO_CODEC_FIRST,
+        VC_FIRST = VIDEO_CODEC_FIRST,
         RGBA = VIDEO_CODEC_FIRST, ///< RGBA 8-bit, big-endian
         UYVY,     ///< YCbCr 422 8-bit - Cb Y0 Cr Y1
         YUYV,     ///< YCbCr 422 8-bit - Y0 Cb Y1 Cr
@@ -105,6 +106,8 @@ typedef enum {
         PRORES_422_PROXY, ///< Apple ProRes 422 (Proxy)
         PRORES_422_LT,    ///< Apple ProRes 422 (LT)
         VIDEO_CODEC_COUNT, ///< count of known video codecs (including VIDEO_CODEC_NONE)
+        VC_COUNT        = VIDEO_CODEC_COUNT,
+        VC_END          = VIDEO_CODEC_COUNT,
         VIDEO_CODEC_END = VIDEO_CODEC_COUNT
 } codec_t;
 

src/vo_postprocess/delay.c

@@ -0,0 +1,206 @@
+/**
+ * @file   vo_postprocess/delay.c
+ * @author Martin Pulec     <pulec@cesnet.cz>
+ */
+/*
+ * Copyright (c) 2024 CESNET z.s.p.o.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, is permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of CESNET nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+ * EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <assert.h>
+#include <limits.h>
+#include <math.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "debug.h"
+#include "lib_common.h"
+#include "types.h"
+#include "utils/color_out.h"
+#include "utils/list.h"
+#include "utils/macros.h"
+#include "video_codec.h"
+#include "video_display.h"
+#include "video_frame.h"
+#include "vo_postprocess.h"
+
+#define MOD_NAME "[vpp/delay] "
+
+struct state_delay {
+        double                     delay_sec;
+        int                        delay_frames;
+        struct video_desc          desc;
+        struct simple_linked_list *cached_frames;
+};
+
+static bool
+delay_get_property(void *state, int property, void *val, size_t *len)
+{
+        (void) state;
+        if (property != VO_PP_PROPERTY_CODECS) {
+                return false;
+        }
+        const size_t codecs_len = (VC_END - VC_FIRST) * sizeof(codec_t);
+        assert(codecs_len <= *len);
+        *len            = codecs_len;
+        codec_t *codecs = val;
+        for (int i = VC_FIRST; i < VC_END; ++i) {
+                codecs[i] = i;
+        }
+        return true;
+}
+
+static void
+usage()
+{
+        color_printf(TBOLD("delay") " postprocessor settings:\n");
+        color_printf(
+            TBOLD(TRED("\t-p delay:[seconds=<s>|frames=<f>]")) " | " TBOLD(
+                "-p delay:help") "\n");
+        color_printf("\nSeconds can be given as a decimal number.\n");
+        color_printf("\n");
+}
+
+static void *
+delay_init(const char *config)
+{
+        if (!IS_KEY_PREFIX(config, "seconds") &&
+            !IS_KEY_PREFIX(config, "frames")) {
+                usage();
+                return NULL;
+        }
+
+        const char *val_s = strchr(config, '=') + 1;
+        double      val   = strtod(val_s, NULL);
+        if (val <= 0 || val > INT_MAX) {
+                MSG(ERROR, "Wrong delay value: %s\n", val_s);
+                return NULL;
+        }
+        if (IS_KEY_PREFIX(config, "frames") && fabs(round(val) - val) > 0.0) {
+                MSG(ERROR, "Number of frames should be an integer, given: %s\n",
+                    val_s);
+                return NULL;
+        }
+
+        struct state_delay *s = calloc(1, sizeof(struct state_delay));
+        assert(s != NULL);
+        if (IS_KEY_PREFIX(config, "seconds")) {
+                s->delay_sec = val;
+        } else {
+                s->delay_frames = (int) val;
+        }
+        s->cached_frames = simple_linked_list_init();
+
+        return s;
+}
+
+static bool
+delay_reconfigure(void *state, struct video_desc desc)
+{
+        struct state_delay *s = (struct state_delay *) state;
+        s->desc               = desc;
+
+        struct video_frame *f = NULL;
+        while ((f = simple_linked_list_pop(s->cached_frames)) != NULL) {
+                vf_free(f);
+        }
+
+        return true;
+}
+
+static struct video_frame *
+delay_getf(void *state)
+{
+        struct state_delay *s = state;
+
+        return vf_alloc_desc_data(s->desc);
+}
+
+static bool
+delay_postprocess(void *state, struct video_frame *in, struct video_frame *out,
+                  int req_pitch)
+{
+        struct state_delay *s = state;
+
+        simple_linked_list_append(s->cached_frames, in);
+
+        const int list_size = simple_linked_list_size(s->cached_frames);
+        if (s->delay_frames >= 0 && list_size < s->delay_frames) {
+                return false;
+        }
+
+        if (list_size / s->desc.fps < s->delay_sec) {
+                return false;
+        }
+
+        struct video_frame *f = simple_linked_list_pop(s->cached_frames);
+        const size_t        linesize =
+            vc_get_linesize(f->tiles[0].width, f->color_spec);
+        for (size_t i = 0; i < s->desc.height; ++i) {
+                memcpy(out->tiles[0].data + i * req_pitch,
+                       f->tiles[0].data + i * linesize, linesize);
+        }
+        vf_free(f);
+
+        return true;
+}
+
+static void
+delay_done(void *state)
+{
+        struct state_delay *s = state;
+
+        struct video_frame *f = NULL;
+        while ((f = simple_linked_list_pop(s->cached_frames)) != NULL) {
+                vf_free(f);
+        }
+        simple_linked_list_destroy(s->cached_frames);
+        free(s);
+}
+
+static void
+delay_get_out_desc(void *state, struct video_desc *out, int *in_display_mode,
+                   int *out_frames)
+{
+        struct state_delay *s = state;
+
+        *out             = s->desc;
+        *in_display_mode = DISPLAY_PROPERTY_VIDEO_MERGED;
+        *out_frames      = 1;
+}
+
+static const struct vo_postprocess_info vo_pp_delay_info = {
+        delay_init,         delay_reconfigure, delay_getf, delay_get_out_desc,
+        delay_get_property, delay_postprocess, delay_done,
+};
+
+REGISTER_MODULE(delay, &vo_pp_delay_info, LIBRARY_CLASS_VIDEO_POSTPROCESS,
+                VO_PP_ABI_VERSION);