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avcodec: LEAD MCMP decoder
Partially fixes ticket #798 Reviewed-by: James Almer <jamrial@gmail.com> Reviewed-by: Michael Niedermayer <michael@niedermayer.cc> Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Peter Ross <pross@xvid.org>
This commit is contained in:
Peter Ross
parent
f084e9b0be
commit
10869cd849
@ -1,6 +1,9 @@
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Entries are sorted chronologically from oldest to youngest within each release,
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releases are sorted from youngest to oldest.
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version <next>:
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- LEAD MCMP decoder
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version 6.1:
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- libaribcaption decoder
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- Playdate video decoder and demuxer
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1
configure
vendored
1
configure
vendored
@ -2887,6 +2887,7 @@ ipu_decoder_select="mpegvideodec"
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jpegls_decoder_select="mjpeg_decoder"
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jv_decoder_select="blockdsp"
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lagarith_decoder_select="llviddsp"
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lead_decoder_select="idctdsp jpegtables"
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ljpeg_encoder_select="jpegtables"
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lscr_decoder_select="inflate_wrapper"
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magicyuv_decoder_select="llviddsp"
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@ -997,6 +997,7 @@ following image formats are supported:
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@item Lagarith @tab @tab X
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@item LCL (LossLess Codec Library) MSZH @tab @tab X
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@item LCL (LossLess Codec Library) ZLIB @tab E @tab E
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@item LEAD MCMP @tab @tab X
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@item LOCO @tab @tab X
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@item LucasArts SANM/Smush @tab @tab X
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@tab Used in LucasArts games / SMUSH animations.
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@ -479,6 +479,7 @@ OBJS-$(CONFIG_JV_DECODER) += jvdec.o
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OBJS-$(CONFIG_KGV1_DECODER) += kgv1dec.o
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OBJS-$(CONFIG_KMVC_DECODER) += kmvc.o
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OBJS-$(CONFIG_LAGARITH_DECODER) += lagarith.o lagarithrac.o
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OBJS-$(CONFIG_LEAD_DECODER) += leaddec.o jpegquanttables.o
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OBJS-$(CONFIG_LJPEG_ENCODER) += ljpegenc.o mjpegenc_common.o
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OBJS-$(CONFIG_LOCO_DECODER) += loco.o
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OBJS-$(CONFIG_LSCR_DECODER) += lscrdec.o png.o pngdec.o pngdsp.o
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@ -188,6 +188,7 @@ extern const FFCodec ff_jv_decoder;
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extern const FFCodec ff_kgv1_decoder;
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extern const FFCodec ff_kmvc_decoder;
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extern const FFCodec ff_lagarith_decoder;
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extern const FFCodec ff_lead_decoder;
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extern const FFCodec ff_ljpeg_encoder;
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extern const FFCodec ff_loco_decoder;
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extern const FFCodec ff_lscr_decoder;
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@ -1960,6 +1960,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
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.long_name = NULL_IF_CONFIG_SMALL("vMix Video"),
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.props = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSY,
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},
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{
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.id = AV_CODEC_ID_LEAD,
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.type = AVMEDIA_TYPE_VIDEO,
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.name = "lead",
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.long_name = NULL_IF_CONFIG_SMALL("LEAD MCMP"),
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.props = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSY,
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},
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/* various PCM "codecs" */
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{
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@ -324,6 +324,7 @@ enum AVCodecID {
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AV_CODEC_ID_EVC,
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AV_CODEC_ID_RTV1,
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AV_CODEC_ID_VMIX,
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AV_CODEC_ID_LEAD,
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/* various PCM "codecs" */
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AV_CODEC_ID_FIRST_AUDIO = 0x10000, ///< A dummy id pointing at the start of audio codecs
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62
libavcodec/leaddata.h
Normal file
62
libavcodec/leaddata.h
Normal file
@ -0,0 +1,62 @@
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/*
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* LEAD MCMP decoder tables
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_LEADDATA_H
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#define AVCODEC_LEADDATA_H
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#include <stdint.h>
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static const uint8_t luma_dc_len[]={
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2, 3, 3, 3, 3, 3, 4, 5, 6, 7, 8, 9
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};
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static const uint8_t chroma_dc_len[]={
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2, 2, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11
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};
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static const uint8_t luma_ac_len[]={
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2, 2, 3, 4, 4, 4, 5, 5, 5, 6, 6, 7, 7, 7, 7, 8,
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8, 8, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 11, 11, 11, 11,
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12, 12, 12, 12, 15, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
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16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
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16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
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16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
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16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
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16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
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16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
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16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
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16, 16
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};
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static const uint8_t chroma_ac_len[]={
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2, 2, 3, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7,
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8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10,
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11, 11, 11, 11, 12, 12, 12, 12, 14, 15, 15, 16, 16, 16, 16, 16,
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16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
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16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
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16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
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16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
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16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
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16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
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16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
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16, 16
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};
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#endif /* AVCODEC_LEADDATA_H */
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270
libavcodec/leaddec.c
Normal file
270
libavcodec/leaddec.c
Normal file
@ -0,0 +1,270 @@
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/*
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* LEAD MCMP decoder
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*
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* Copyright (c) 2023 Peter Ross
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "avcodec.h"
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#include "blockdsp.h"
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#include "codec_internal.h"
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#include "copy_block.h"
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#include "decode.h"
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#include "get_bits.h"
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#include "idctdsp.h"
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#include "jpegquanttables.h"
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#include "jpegtables.h"
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#include "leaddata.h"
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#include "libavutil/mem_internal.h"
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#include "libavutil/thread.h"
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#define LUMA_DC_BITS 9
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#define CHROMA_DC_BITS 11
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#define LUMA_AC_BITS 10
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#define CHROMA_AC_BITS 10
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static VLC luma_dc_vlc;
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static VLC chroma_dc_vlc;
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static VLC luma_ac_vlc;
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static VLC chroma_ac_vlc;
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static av_cold void lead_init_static_data(void)
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{
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VLC_INIT_STATIC_FROM_LENGTHS(&luma_dc_vlc, LUMA_DC_BITS, FF_ARRAY_ELEMS(luma_dc_len),
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luma_dc_len, 1,
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0, 0, 0,
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0, 0, 1 << LUMA_DC_BITS);
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VLC_INIT_STATIC_FROM_LENGTHS(&chroma_dc_vlc, CHROMA_DC_BITS, FF_ARRAY_ELEMS(chroma_dc_len),
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chroma_dc_len, 1,
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0, 0, 0,
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0, 0, 1 << CHROMA_DC_BITS);
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VLC_INIT_STATIC_FROM_LENGTHS(&luma_ac_vlc, LUMA_AC_BITS, FF_ARRAY_ELEMS(luma_ac_len),
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luma_ac_len, 1,
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ff_mjpeg_val_ac_luminance, 1, 1,
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0, 0, 1160);
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VLC_INIT_STATIC_FROM_LENGTHS(&chroma_ac_vlc, CHROMA_AC_BITS, FF_ARRAY_ELEMS(chroma_ac_len),
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chroma_ac_len, 1,
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ff_mjpeg_val_ac_chrominance, 1, 1,
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0, 0, 1160);
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}
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typedef struct LeadContext {
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uint8_t *bitstream_buf;
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unsigned int bitstream_buf_size;
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BlockDSPContext bdsp;
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IDCTDSPContext idsp;
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uint8_t permutated_scantable[64];
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} LeadContext;
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static av_cold int lead_decode_init(AVCodecContext * avctx)
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{
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static AVOnce init_static_once = AV_ONCE_INIT;
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LeadContext *s = avctx->priv_data;
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if (avctx->extradata_size < 20)
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return AVERROR_INVALIDDATA;
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ff_blockdsp_init(&s->bdsp);
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ff_idctdsp_init(&s->idsp, avctx);
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ff_permute_scantable(s->permutated_scantable, ff_zigzag_direct, s->idsp.idct_permutation);
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ff_thread_once(&init_static_once, lead_init_static_data);
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return 0;
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}
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static void calc_dequant(uint16_t * dequant, const uint8_t * quant_tbl, int q)
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{
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for (int i = 0; i < 64; i++)
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dequant[i] = av_clip(q * quant_tbl[ff_zigzag_direct[i]] / 50, 2, 32767);
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}
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static int decode_block(LeadContext * s, GetBitContext * gb,
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const VLCElem * dc_table, int dc_bits, const VLCElem * ac_table, int ac_bits,
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int16_t * dc_pred, const uint16_t * dequant,
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uint8_t * dst, int stride)
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{
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DECLARE_ALIGNED(32, int16_t, block)[64];
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int size;
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s->bdsp.clear_block(block);
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size = get_vlc2(gb, dc_table, dc_bits, 1);
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if (size < 0)
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return AVERROR_INVALIDDATA;
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if (size)
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*dc_pred += get_xbits(gb, size);
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block[0] = (1 << 10) + *dc_pred * dequant[0];
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for (int i = 1; i < 64; i++) {
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int symbol = get_vlc2(gb, ac_table, ac_bits, 2);
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if (symbol < 0)
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return AVERROR_INVALIDDATA;
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if (!symbol)
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break;
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i += symbol >> 4;
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if (i >= 64)
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return AVERROR_INVALIDDATA;
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size = symbol & 0xF;
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if (size)
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block[s->permutated_scantable[i]] = get_xbits(gb, size) * dequant[i];
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}
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s->idsp.idct_put(dst, stride, block);
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return 0;
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}
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static int lead_decode_frame(AVCodecContext *avctx, AVFrame * frame,
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int * got_frame, AVPacket * avpkt)
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{
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LeadContext *s = avctx->priv_data;
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const uint8_t * buf = avpkt->data;
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int ret, format, yuv20p_half = 0, fields = 1, q, size;
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GetBitContext gb;
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int16_t dc_pred[3] = {0, 0, 0};
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uint16_t dequant[2][64];
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if (avpkt->size < 8)
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return AVERROR_INVALIDDATA;
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format = AV_RL16(buf + 4);
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switch(format) {
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case 0x8000:
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yuv20p_half = 1;
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// fall-through
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case 0x1000:
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avctx->pix_fmt = AV_PIX_FMT_YUV420P;
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break;
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case 0x2000:
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avctx->pix_fmt = AV_PIX_FMT_YUV444P;
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break;
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case 0x2006:
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avctx->pix_fmt = AV_PIX_FMT_YUV444P;
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fields = 2;
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break;
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default:
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avpriv_request_sample(avctx, "unsupported format 0x%x", format);
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return AVERROR_PATCHWELCOME;
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}
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q = AV_RL16(buf + 6);
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calc_dequant(dequant[0], ff_mjpeg_std_luminance_quant_tbl, q);
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calc_dequant(dequant[1], ff_mjpeg_std_chrominance_quant_tbl, q);
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if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
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return ret;
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frame->flags |= AV_FRAME_FLAG_KEY;
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frame->pict_type = AV_PICTURE_TYPE_I;
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av_fast_padded_malloc(&s->bitstream_buf, &s->bitstream_buf_size, avpkt->size - 8);
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if (!s->bitstream_buf)
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return AVERROR(ENOMEM);
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size = 0;
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for (int i = 8; i < avpkt->size; i++) {
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int src = buf[i] ^ 0x80;
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s->bitstream_buf[size++] = src;
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if (src == 0xFF && i + 1 < avpkt->size && (buf[i + 1] ^ 0x80) == 0x00)
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i++;
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}
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init_get_bits8(&gb, s->bitstream_buf, size);
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if (avctx->pix_fmt == AV_PIX_FMT_YUV420P) {
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for (int mb_y = 0; mb_y < avctx->height / 16; mb_y++)
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for (int mb_x = 0; mb_x < avctx->width / 16; mb_x++)
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for (int b = 0; b < (yuv20p_half ? 4 : 6); b++) {
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int luma_block = yuv20p_half ? 2 : 4;
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const VLCElem * dc_vlc = b < luma_block ? luma_dc_vlc.table : chroma_dc_vlc.table;
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int dc_bits = b < luma_block ? LUMA_DC_BITS : CHROMA_DC_BITS;
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const VLCElem * ac_vlc = b < luma_block ? luma_ac_vlc.table : chroma_ac_vlc.table;
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int ac_bits = b < luma_block ? LUMA_AC_BITS : CHROMA_AC_BITS;
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int plane = b < luma_block ? 0 : b - (yuv20p_half ? 1 : 3);
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int x, y;
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if (b < luma_block) {
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y = 16*mb_y + 8*(b >> 1);
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x = 16*mb_x + 8*(b & 1);
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} else {
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y = 8*mb_y;
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x = 8*mb_x;
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}
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ret = decode_block(s, &gb, dc_vlc, dc_bits, ac_vlc, ac_bits,
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dc_pred + plane, dequant[!(b < 4)],
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frame->data[plane] + y*frame->linesize[plane] + x,
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(yuv20p_half && b < 2 ? 2 : 1) * frame->linesize[plane]);
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if (ret < 0)
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return ret;
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if (yuv20p_half && b < 2)
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copy_block8(frame->data[plane] + (y + 1)*frame->linesize[plane] + x,
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frame->data[plane] + y*frame->linesize[plane] + x,
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2*frame->linesize[plane], 2*frame->linesize[plane], 8);
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}
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} else {
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for (int f = 0; f < fields; f++)
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for (int j = 0; j < avctx->height / fields / 8; j++)
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for (int i = 0; i < avctx->width / 8; i++)
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for (int plane = 0; plane < 3; plane++) {
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const VLCElem * dc_vlc = !plane ? luma_dc_vlc.table : chroma_dc_vlc.table;
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int dc_bits = !plane ? LUMA_DC_BITS : CHROMA_DC_BITS;
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const VLCElem * ac_vlc = !plane ? luma_ac_vlc.table : chroma_ac_vlc.table;
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int ac_bits = !plane ? LUMA_AC_BITS : CHROMA_AC_BITS;
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ret = decode_block(s, &gb, dc_vlc, dc_bits, ac_vlc, ac_bits,
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dc_pred + plane, dequant[!!plane],
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frame->data[plane] + (f + 8*j*fields)*frame->linesize[plane] + 8*i,
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fields * frame->linesize[plane]);
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if (ret < 0)
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return ret;
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}
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}
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*got_frame = 1;
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return avpkt->size;
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}
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static av_cold int lead_decode_end(AVCodecContext * avctx)
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{
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LeadContext *s = avctx->priv_data;
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av_freep(&s->bitstream_buf);
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return 0;
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}
|
||||
|
||||
const FFCodec ff_lead_decoder = {
|
||||
.p.name = "lead",
|
||||
CODEC_LONG_NAME("LEAD MCMP"),
|
||||
.p.type = AVMEDIA_TYPE_VIDEO,
|
||||
.p.id = AV_CODEC_ID_LEAD,
|
||||
.priv_data_size = sizeof(LeadContext),
|
||||
.init = lead_decode_init,
|
||||
.close = lead_decode_end,
|
||||
FF_CODEC_DECODE_CB(lead_decode_frame),
|
||||
.p.capabilities = AV_CODEC_CAP_DR1,
|
||||
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
|
||||
};
|
||||
@ -29,8 +29,8 @@
|
||||
|
||||
#include "version_major.h"
|
||||
|
||||
#define LIBAVCODEC_VERSION_MINOR 32
|
||||
#define LIBAVCODEC_VERSION_MICRO 102
|
||||
#define LIBAVCODEC_VERSION_MINOR 33
|
||||
#define LIBAVCODEC_VERSION_MICRO 100
|
||||
|
||||
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
|
||||
LIBAVCODEC_VERSION_MINOR, \
|
||||
|
||||
@ -505,6 +505,7 @@ const AVCodecTag ff_codec_bmp_tags[] = {
|
||||
{ AV_CODEC_ID_VQC, MKTAG('V', 'Q', 'C', '2') },
|
||||
{ AV_CODEC_ID_RTV1, MKTAG('R', 'T', 'V', '1') },
|
||||
{ AV_CODEC_ID_VMIX, MKTAG('V', 'M', 'X', '1') },
|
||||
{ AV_CODEC_ID_LEAD, MKTAG('L', 'E', 'A', 'D') },
|
||||
{ AV_CODEC_ID_NONE, 0 }
|
||||
};
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user