Bump on this one. Would be really nice to have since dvd demuxer is merged,
and colors are part of the presentation. It did have 2 reviews. Thank you.
On Sun, Feb 18, 2024 at 10:02 PM Marth64 <mart...@proxyid.net> wrote:
> Signed-off-by: Marth64 <mart...@proxyid.net>
> ---
> doc/demuxers.texi | 5 +++
> libavformat/Makefile | 2 +-
> libavformat/dvdclut.c | 76 +++++++++++++++++++++++++++++++++++++++
> libavformat/dvdclut.h | 37 +++++++++++++++++++
> libavformat/dvdvideodec.c | 14 ++++++++
> 5 files changed, 133 insertions(+), 1 deletion(-)
> create mode 100644 libavformat/dvdclut.c
> create mode 100644 libavformat/dvdclut.h
>
> diff --git a/doc/demuxers.texi b/doc/demuxers.texi
> index 062ea2ea42..d3c7675631 100644
> --- a/doc/demuxers.texi
> +++ b/doc/demuxers.texi
> @@ -391,6 +391,11 @@ often with junk data intended for controlling a real
> DVD player's
> buffering speed and with no other material data value.
> Default is 1, true.
>
> +@item clut_rgb @var{bool}
> +Output subtitle palettes (CLUTs) as RGB, required for Matroska.
> +Disable to output the palette in its original YUV colorspace.
> +Default is 1, true.
> +
> @end table
>
> @subsection Examples
> diff --git a/libavformat/Makefile b/libavformat/Makefile
> index eda1f6e177..501159d9ca 100644
> --- a/libavformat/Makefile
> +++ b/libavformat/Makefile
> @@ -192,7 +192,7 @@ OBJS-$(CONFIG_DTS_MUXER) += rawenc.o
> OBJS-$(CONFIG_DV_MUXER) += dvenc.o
> OBJS-$(CONFIG_DVBSUB_DEMUXER) += dvbsub.o rawdec.o
> OBJS-$(CONFIG_DVBTXT_DEMUXER) += dvbtxt.o rawdec.o
> -OBJS-$(CONFIG_DVDVIDEO_DEMUXER) += dvdvideodec.o
> +OBJS-$(CONFIG_DVDVIDEO_DEMUXER) += dvdvideodec.o dvdclut.o
> OBJS-$(CONFIG_DXA_DEMUXER) += dxa.o
> OBJS-$(CONFIG_EA_CDATA_DEMUXER) += eacdata.o
> OBJS-$(CONFIG_EA_DEMUXER) += electronicarts.o
> diff --git a/libavformat/dvdclut.c b/libavformat/dvdclut.c
> new file mode 100644
> index 0000000000..2125e91541
> --- /dev/null
> +++ b/libavformat/dvdclut.c
> @@ -0,0 +1,76 @@
> +/*
> + * DVD-Video subpicture CLUT (Color Lookup Table) utilities
> + *
> + * 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
> + */
> +
> +#include "libavutil/bprint.h"
> +#include "libavutil/colorspace.h"
> +#include "libavutil/common.h"
> +
> +#include "dvdclut.h"
> +#include "internal.h"
> +
> +int ff_dvdclut_palette_extradata_cat(const uint32_t *clut,
> + const size_t clut_size,
> + AVCodecParameters *par)
> +{
> + int ret = 0;
> + AVBPrint bp;
> +
> + if (clut_size != FF_DVDCLUT_CLUT_SIZE)
> + return AVERROR(EINVAL);
> +
> + av_bprint_init(&bp, 0, FF_DVDCLUT_EXTRADATA_SIZE);
> +
> + av_bprintf(&bp, "palette: ");
> +
> + for (int i = 0; i < FF_DVDCLUT_CLUT_LEN; i++)
> + av_bprintf(&bp, "%06"PRIx32"%s", clut[i],
> + i != (FF_DVDCLUT_CLUT_LEN - 1) ? ", " : "");
> +
> + av_bprintf(&bp, "\n");
> +
> + return ff_bprint_to_codecpar_extradata(par, &bp);
> +}
> +
> +int ff_dvdclut_yuv_to_rgb(uint32_t *clut, const size_t clut_size)
> +{
> + int y, cb, cr;
> + uint8_t r, g, b;
> + int r_add, g_add, b_add;
> +
> + if (clut_size != FF_DVDCLUT_CLUT_SIZE)
> + return AVERROR(EINVAL);
> +
> + for (int i = 0; i < FF_DVDCLUT_CLUT_LEN; i++) {
> + y = (clut[i] >> 16) & 0xFF;
> + cr = (clut[i] >> 8) & 0xFF;
> + cb = clut[i] & 0xFF;
> +
> + YUV_TO_RGB1_CCIR(cb, cr);
> +
> + y = (y - 16) * FIX(255.0 / 219.0);
> + r = av_clip_uint8((y + r_add - 1024) >> SCALEBITS);
> + g = av_clip_uint8((y + g_add - 1024) >> SCALEBITS);
> + b = av_clip_uint8((y + b_add - 1024) >> SCALEBITS);
> +
> + clut[i] = (r << 16) | (g << 8) | b;
> + }
> +
> + return 0;
> +}
> diff --git a/libavformat/dvdclut.h b/libavformat/dvdclut.h
> new file mode 100644
> index 0000000000..41cea7e2c9
> --- /dev/null
> +++ b/libavformat/dvdclut.h
> @@ -0,0 +1,37 @@
> +/*
> + * DVD-Video subpicture CLUT (Color Lookup Table) utilities
> + *
> + * 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
> + */
> +
> +#ifndef AVFORMAT_DVDCLUT_H
> +#define AVFORMAT_DVDCLUT_H
> +
> +#include "libavcodec/codec_par.h"
> +
> +/* ("palette: ") + ("rrggbb, "*15) + ("rrggbb") + \n + \0 */
> +#define FF_DVDCLUT_EXTRADATA_SIZE (9 + (8 * 15) + 6 + 1 + 1)
> +#define FF_DVDCLUT_CLUT_LEN 16
> +#define FF_DVDCLUT_CLUT_SIZE FF_DVDCLUT_CLUT_LEN *
> sizeof(uint32_t)
> +
> +int ff_dvdclut_palette_extradata_cat(const uint32_t *clut,
> + const size_t clut_size,
> + AVCodecParameters *par);
> +
> +int ff_dvdclut_yuv_to_rgb(uint32_t *clut, const size_t clut_size);
> +
> +#endif /* AVFORMAT_DVDCLUT_H */
> diff --git a/libavformat/dvdvideodec.c b/libavformat/dvdvideodec.c
> index 3355010356..0951189124 100644
> --- a/libavformat/dvdvideodec.c
> +++ b/libavformat/dvdvideodec.c
> @@ -49,6 +49,7 @@
> #include "avio_internal.h"
> #include "avlanguage.h"
> #include "demux.h"
> +#include "dvdclut.h"
> #include "internal.h"
> #include "url.h"
>
> @@ -95,6 +96,7 @@ typedef struct DVDVideoPGCSubtitleStreamEntry {
> int startcode;
> enum DVDVideoSubpictureViewport viewport;
> int disposition;
> + uint32_t clut[FF_DVDCLUT_CLUT_LEN];
> const char *lang_iso;
> } DVDVideoPGCSubtitleStreamEntry;
>
> @@ -128,6 +130,7 @@ typedef struct DVDVideoDemuxContext {
> int opt_angle; /* the user-provided
> angle number (1-indexed) */
> int opt_chapter_end; /* the user-provided
> exit PTT (0 for last) */
> int opt_chapter_start; /* the user-provided
> entry PTT (1-indexed) */
> + int opt_clut_rgb; /* output subtitle
> palette (CLUT) as RGB */
> int opt_pg; /* the user-provided
> PG number (1-indexed) */
> int opt_pgc; /* the user-provided
> PGC number (1-indexed) */
> int opt_preindex; /* pre-indexing mode
> (2-pass read) */
> @@ -1038,6 +1041,8 @@ break_error:
> static int dvdvideo_subp_stream_analyze(AVFormatContext *s, uint32_t
> offset, subp_attr_t subp_attr,
> DVDVideoPGCSubtitleStreamEntry
> *entry)
> {
> + DVDVideoDemuxContext *c = s->priv_data;
> +
> char lang_dvd[3] = {0};
>
> entry->startcode = 0x20 + (offset & 0x1F);
> @@ -1045,6 +1050,11 @@ static int
> dvdvideo_subp_stream_analyze(AVFormatContext *s, uint32_t offset, sub
> if (subp_attr.lang_extension == 9)
> entry->disposition |= AV_DISPOSITION_FORCED;
>
> + memcpy(&entry->clut, c->play_state.pgc->palette,
> FF_DVDCLUT_CLUT_SIZE);
> +
> + if (c->opt_clut_rgb)
> + ff_dvdclut_yuv_to_rgb(entry->clut, FF_DVDCLUT_CLUT_SIZE);
> +
> AV_WB16(lang_dvd, subp_attr.lang_code);
> entry->lang_iso = ff_convert_lang_to(lang_dvd, AV_LANG_ISO639_2_BIBL);
>
> @@ -1066,6 +1076,9 @@ static int dvdvideo_subp_stream_add(AVFormatContext
> *s, DVDVideoPGCSubtitleStrea
> st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
> st->codecpar->codec_id = AV_CODEC_ID_DVD_SUBTITLE;
>
> + if ((ret = ff_dvdclut_palette_extradata_cat(entry->clut,
> FF_DVDCLUT_CLUT_SIZE, st->codecpar)) < 0)
> + return ret;
> +
> if (entry->lang_iso)
> av_dict_set(&st->metadata, "language", entry->lang_iso, 0);
>
> @@ -1382,6 +1395,7 @@ static const AVOption dvdvideo_options[] = {
> {"angle", "playback angle number",
> OFFSET(opt_angle), AV_OPT_TYPE_INT, { .i64=1 },
> 1, 9, AV_OPT_FLAG_DECODING_PARAM },
> {"chapter_end", "exit chapter (PTT) number (0=end)",
> OFFSET(opt_chapter_end), AV_OPT_TYPE_INT, { .i64=0 },
> 0, 99, AV_OPT_FLAG_DECODING_PARAM },
> {"chapter_start", "entry chapter (PTT) number",
> OFFSET(opt_chapter_start), AV_OPT_TYPE_INT, { .i64=1 },
> 1, 99, AV_OPT_FLAG_DECODING_PARAM },
> + {"clut_rgb", "output subtitle palette (CLUT) as RGB",
> OFFSET(opt_clut_rgb), AV_OPT_TYPE_BOOL, { .i64=1 },
> 0, 1, AV_OPT_FLAG_DECODING_PARAM },
> {"pg", "entry PG number (0=auto)",
> OFFSET(opt_pg), AV_OPT_TYPE_INT, { .i64=0 },
> 0, 255, AV_OPT_FLAG_DECODING_PARAM },
> {"pgc", "entry PGC number (0=auto)",
> OFFSET(opt_pgc), AV_OPT_TYPE_INT, { .i64=0 },
> 0, 999, AV_OPT_FLAG_DECODING_PARAM },
> {"preindex", "enable for accurate chapter markers, slow
> (2-pass read)", OFFSET(opt_preindex), AV_OPT_TYPE_BOOL, { .i64=0
> }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
> --
> 2.34.1
>
>
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