[FFmpeg-devel] [PATCH] avfilter: add palettedbg filter

Clément Bœsch u at pkh.me
Thu Jan 15 14:21:18 CET 2015


From: Clément Bœsch <clement at stupeflix.com>

---
 Changelog                        |   1 +
 doc/filters.texi                 |  13 ++
 libavfilter/Makefile             |   1 +
 libavfilter/allfilters.c         |   1 +
 libavfilter/version.h            |   4 +-
 libavfilter/vf_palettedbg.c      | 127 ++++++++++++++++
 tests/fate/filter-video.mak      |   3 +
 tests/ref/fate/filter-palettedbg | 316 +++++++++++++++++++++++++++++++++++++++
 8 files changed, 464 insertions(+), 2 deletions(-)
 create mode 100644 libavfilter/vf_palettedbg.c
 create mode 100644 tests/ref/fate/filter-palettedbg

diff --git a/Changelog b/Changelog
index 4fc3800..4dd02e0 100644
--- a/Changelog
+++ b/Changelog
@@ -15,6 +15,7 @@ version <next>:
 - VOC seeking support
 - Closed caption Decoder
 - fspp, uspp, pp7 MPlayer postprocessing filters ported to native filters
+- palettedbg filter
 
 
 version 2.5:
diff --git a/doc/filters.texi b/doc/filters.texi
index 154508c..faaeeaf 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -6885,6 +6885,19 @@ pad="2*iw:2*ih:ow-iw:oh-ih"
 @end example
 @end itemize
 
+ at section palettedbg
+
+Displays the 256 colors palette of each frame. This filter is only relevant for
+ at var{pal8} pixel format frames.
+
+It accepts the following option:
+
+ at table @option
+ at item s
+Set the size of the box used to represent one palette color entry. Default is
+ at code{30} (for a @code{30x30} pixel box).
+ at end table
+
 @section perspective
 
 Correct perspective of video not recorded perpendicular to the screen.
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index 37f5a65..9a8983b 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -162,6 +162,7 @@ OBJS-$(CONFIG_PAD_FILTER)                    += vf_pad.o
 OBJS-$(CONFIG_PERMS_FILTER)                  += f_perms.o
 OBJS-$(CONFIG_PERSPECTIVE_FILTER)            += vf_perspective.o
 OBJS-$(CONFIG_PHASE_FILTER)                  += vf_phase.o
+OBJS-$(CONFIG_PALETTEDBG_FILTER)             += vf_palettedbg.o
 OBJS-$(CONFIG_PIXDESCTEST_FILTER)            += vf_pixdesctest.o
 OBJS-$(CONFIG_PP_FILTER)                     += vf_pp.o
 OBJS-$(CONFIG_PP7_FILTER)                    += vf_pp7.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index b19da61..87c17b0 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -174,6 +174,7 @@ void avfilter_register_all(void)
     REGISTER_FILTER(OVERLAY,        overlay,        vf);
     REGISTER_FILTER(OWDENOISE,      owdenoise,      vf);
     REGISTER_FILTER(PAD,            pad,            vf);
+    REGISTER_FILTER(PALETTEDBG,     palettedbg,     vf);
     REGISTER_FILTER(PERMS,          perms,          vf);
     REGISTER_FILTER(PERSPECTIVE,    perspective,    vf);
     REGISTER_FILTER(PHASE,          phase,          vf);
diff --git a/libavfilter/version.h b/libavfilter/version.h
index 383eb55..021f01c 100644
--- a/libavfilter/version.h
+++ b/libavfilter/version.h
@@ -30,8 +30,8 @@
 #include "libavutil/version.h"
 
 #define LIBAVFILTER_VERSION_MAJOR  5
-#define LIBAVFILTER_VERSION_MINOR  7
-#define LIBAVFILTER_VERSION_MICRO 101
+#define LIBAVFILTER_VERSION_MINOR  8
+#define LIBAVFILTER_VERSION_MICRO 100
 
 #define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
                                                LIBAVFILTER_VERSION_MINOR, \
diff --git a/libavfilter/vf_palettedbg.c b/libavfilter/vf_palettedbg.c
new file mode 100644
index 0000000..11c902b
--- /dev/null
+++ b/libavfilter/vf_palettedbg.c
@@ -0,0 +1,127 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * Palette (AV_PIX_FMT_PAL8) debugger
+ */
+
+#include "libavutil/avassert.h"
+#include "libavutil/opt.h"
+#include "avfilter.h"
+#include "formats.h"
+#include "internal.h"
+#include "video.h"
+
+typedef struct {
+    const AVClass *class;
+    int size;
+} PaletteDebugContext;
+
+#define OFFSET(x) offsetof(PaletteDebugContext, x)
+#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
+static const AVOption palettedbg_options[] = {
+    { "s", "set pixel box size", OFFSET(size), AV_OPT_TYPE_INT, {.i64=30}, 1, 100, FLAGS },
+    { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(palettedbg);
+
+static int query_formats(AVFilterContext *ctx)
+{
+    static const enum AVPixelFormat in_fmts[]  = {AV_PIX_FMT_PAL8,  AV_PIX_FMT_NONE};
+    static const enum AVPixelFormat out_fmts[] = {AV_PIX_FMT_RGB32, AV_PIX_FMT_NONE};
+    AVFilterFormats *in  = ff_make_format_list(in_fmts);
+    AVFilterFormats *out = ff_make_format_list(out_fmts);
+    if (!in || !out)
+        return AVERROR(ENOMEM);
+    ff_formats_ref(in,  &ctx->inputs[0]->out_formats);
+    ff_formats_ref(out, &ctx->outputs[0]->in_formats);
+    return 0;
+}
+
+static int config_output(AVFilterLink *outlink)
+{
+    AVFilterContext *ctx = outlink->src;
+    PaletteDebugContext *s = ctx->priv;
+    outlink->w = outlink->h = 16 * s->size;
+    return 0;
+}
+
+static int disp_palette(AVFrame *out, const AVFrame *in, int size)
+{
+    int x, y, i, j;
+    uint32_t *dst = (uint32_t *)out->data[0];
+    const int dst_linesize = out->linesize[0] >> 2;
+    const uint32_t *pal = (uint32_t *)in->data[1];
+
+    for (y = 0; y < 16; y++)
+        for (x = 0; x < 16; x++)
+            for (j = 0; j < size; j++)
+                for (i = 0; i < size; i++)
+                    dst[(y*dst_linesize + x) * size + j*dst_linesize + i] = pal[y*16 + x];
+    return 0;
+}
+
+static int filter_frame(AVFilterLink *inlink, AVFrame *in)
+{
+    int ret;
+    AVFrame *out;
+    AVFilterContext *ctx = inlink->dst;
+    PaletteDebugContext *palettedbg = ctx->priv;
+    AVFilterLink *outlink = ctx->outputs[0];
+
+    out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
+    if (!out) {
+        av_frame_free(&in);
+        return AVERROR(ENOMEM);
+    }
+    av_frame_copy_props(out, in);
+    ret = disp_palette(out, in, palettedbg->size);
+    av_frame_free(&in);
+    return ret < 0 ? ret : ff_filter_frame(outlink, out);
+}
+
+static const AVFilterPad palettedbg_inputs[] = {
+    {
+        .name         = "default",
+        .type         = AVMEDIA_TYPE_VIDEO,
+        .filter_frame = filter_frame,
+    },
+    { NULL }
+};
+
+static const AVFilterPad palettedbg_outputs[] = {
+    {
+        .name         = "default",
+        .type         = AVMEDIA_TYPE_VIDEO,
+        .config_props = config_output,
+    },
+    { NULL }
+};
+
+AVFilter ff_vf_palettedbg = {
+    .name          = "palettedbg",
+    .description   = NULL_IF_CONFIG_SMALL("Display palette"),
+    .priv_size     = sizeof(PaletteDebugContext),
+    .query_formats = query_formats,
+    .inputs        = palettedbg_inputs,
+    .outputs       = palettedbg_outputs,
+    .priv_class    = &palettedbg_class,
+    .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
+};
diff --git a/tests/fate/filter-video.mak b/tests/fate/filter-video.mak
index 414d96d..40b706d 100644
--- a/tests/fate/filter-video.mak
+++ b/tests/fate/filter-video.mak
@@ -26,6 +26,9 @@ FATE_FILTER-$(call ALLYES, MCDEINT_FILTER, MPEGTS_DEMUXER, MPEG2VIDEO_DECODER SN
 FATE_FILTER-$(call ALLYES, CODECVIEW_FILTER RM_DEMUXER RV40_DECODER) += fate-filter-codecview-mvs
 fate-filter-codecview-mvs: CMD = framecrc -flags2 +export_mvs -i $(TARGET_SAMPLES)/real/spygames-2MB.rmvb -vf codecview=mv=pf+bf+bb -vframes 60 -an
 
+FATE_FILTER-$(call ALLYES, PALETTEDBG_FILTER FLIC_DEMUXER FLIC_DECODER) += fate-filter-palettedbg
+fate-filter-palettedbg: CMD = framecrc -i $(TARGET_SAMPLES)/fli/fli-engines.fli -vf palettedbg=3 -pix_fmt bgra
+
 FATE_SAMPLES_AVCONV += $(FATE_FILTER-yes)
 
 FATE_FILTER-$(call ALLYES, AVDEVICE LIFE_FILTER) += fate-filter-lavd-life
diff --git a/tests/ref/fate/filter-palettedbg b/tests/ref/fate/filter-palettedbg
new file mode 100644
index 0000000..1a13c23
--- /dev/null
+++ b/tests/ref/fate/filter-palettedbg
@@ -0,0 +1,316 @@
+#tb 0: 1/35
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-- 
2.2.2



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