mirror of
https://github.com/FFmpeg/FFmpeg.git
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avcodec: ViewQuest VQC decoder
Reviewed-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com> Reviewed-by: Tomas Härdin <git@haerdin.se> Signed-off-by: Peter Ross <pross@xvid.org>
This commit is contained in:
Peter Ross
parent
e253bc4b17
commit
3141dbb7ad
@ -17,6 +17,7 @@ version <next>:
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- APAC decoder and demuxer
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- Media 100i decoders
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- DTS to PTS reorder bsf
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- ViewQuest VQC decoder
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version 5.1:
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@ -1339,6 +1339,7 @@ following image formats are supported:
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@item TwinVQ (VQF flavor) @tab @tab X
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@item VIMA @tab @tab X
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@tab Used in LucasArts SMUSH animations.
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@item ViewQuest VQC @tab @tab X
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@item Vorbis @tab E @tab X
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@tab A native but very primitive encoder exists.
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@item Voxware MetaSound @tab @tab X
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@ -761,6 +761,7 @@ OBJS-$(CONFIG_VP9_QSV_ENCODER) += qsvenc_vp9.o
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OBJS-$(CONFIG_VPLAYER_DECODER) += textdec.o ass.o
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OBJS-$(CONFIG_VP9_V4L2M2M_DECODER) += v4l2_m2m_dec.o
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OBJS-$(CONFIG_VQA_DECODER) += vqavideo.o
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OBJS-$(CONFIG_VQC_DECODER) += vqcdec.o
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OBJS-$(CONFIG_WAVPACK_DECODER) += wavpack.o wavpackdata.o dsd.o
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OBJS-$(CONFIG_WAVPACK_ENCODER) += wavpackdata.o wavpackenc.o
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OBJS-$(CONFIG_WBMP_DECODER) += wbmpdec.o
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@ -381,6 +381,7 @@ extern const FFCodec ff_vp9_decoder;
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extern const FFCodec ff_vp9_rkmpp_decoder;
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extern const FFCodec ff_vp9_v4l2m2m_decoder;
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extern const FFCodec ff_vqa_decoder;
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extern const FFCodec ff_vqc_decoder;
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extern const FFCodec ff_wbmp_decoder;
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extern const FFCodec ff_wbmp_encoder;
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extern const FFCodec ff_webp_decoder;
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@ -1916,6 +1916,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
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.long_name = NULL_IF_CONFIG_SMALL("Media 100i"),
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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_VQC,
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.type = AVMEDIA_TYPE_VIDEO,
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.name = "vqc",
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.long_name = NULL_IF_CONFIG_SMALL("ViewQuest VQC"),
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.props = AV_CODEC_PROP_LOSSY,
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},
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/* various PCM "codecs" */
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{
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@ -319,6 +319,7 @@ enum AVCodecID {
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AV_CODEC_ID_RADIANCE_HDR,
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AV_CODEC_ID_WBMP,
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AV_CODEC_ID_MEDIA100,
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AV_CODEC_ID_VQC,
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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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@ -29,8 +29,8 @@
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#include "version_major.h"
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#define LIBAVCODEC_VERSION_MINOR 50
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#define LIBAVCODEC_VERSION_MICRO 101
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#define LIBAVCODEC_VERSION_MINOR 51
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#define LIBAVCODEC_VERSION_MICRO 100
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#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
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LIBAVCODEC_VERSION_MINOR, \
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430
libavcodec/vqcdec.c
Normal file
430
libavcodec/vqcdec.c
Normal file
@ -0,0 +1,430 @@
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/*
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* ViewQuest VQC decoder
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* Copyright (C) 2022 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 "get_bits.h"
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#include "codec_internal.h"
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#include "decode.h"
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#include "libavutil/thread.h"
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#define VECTOR_VLC_BITS 6
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static const uint8_t vector_nbits[] = {
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2, 4, 4, 4, 4, 2, 4, 4,
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6, 6, 6, 6, 6, 6, 6, 6
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};
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enum {
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SKIP_3 = 0x10,
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SKIP_4,
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SKIP_5,
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SKIP_6,
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STOP_RUN,
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SIGNED_8BIT,
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SIGNED_6BIT
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};
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/* vector symbols are signed, but returned unsigned by get_vlc2()
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codebook indexes are cast as uint8_t in seed_codebook() to compensate */
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static const int8_t vector_symbols[] = {
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0, SKIP_3, SKIP_4, SKIP_5, SKIP_6, STOP_RUN, 1, -1,
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2, 3, 4, SIGNED_8BIT, -2, -3, -4, SIGNED_6BIT
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};
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static VLC vector_vlc;
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static av_cold void vqc_init_static_data(void)
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{
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INIT_VLC_STATIC_FROM_LENGTHS(&vector_vlc, VECTOR_VLC_BITS, FF_ARRAY_ELEMS(vector_nbits),
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vector_nbits, 1,
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vector_symbols, 1, 1,
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0, 0, 1 << VECTOR_VLC_BITS);
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}
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typedef struct VqcContext {
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AVFrame *frame;
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uint8_t * vectors;
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int16_t * coeff, *tmp1, *tmp2;
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int16_t codebook[4][256];
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} VqcContext;
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static av_cold int vqc_decode_init(AVCodecContext * avctx)
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{
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static AVOnce init_static_once = AV_ONCE_INIT;
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VqcContext *s = avctx->priv_data;
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s->vectors = av_malloc((avctx->width * avctx->height * 3) / 2);
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if (!s->vectors)
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return AVERROR(ENOMEM);
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s->coeff = av_malloc_array(2 * avctx->width, sizeof(s->coeff[0]));
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if (!s->coeff)
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return AVERROR(ENOMEM);
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s->tmp1 = av_malloc_array(avctx->width / 2, sizeof(s->tmp1[0]));
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if (!s->tmp1)
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return AVERROR(ENOMEM);
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s->tmp2 = av_malloc_array(avctx->width / 2, sizeof(s->tmp2[0]));
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if (!s->tmp2)
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return AVERROR(ENOMEM);
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avctx->pix_fmt = AV_PIX_FMT_YUV420P;
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s->frame = av_frame_alloc();
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if (!s->frame)
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return AVERROR(ENOMEM);
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ff_thread_once(&init_static_once, vqc_init_static_data);
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return 0;
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}
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static int seed_pow1(int x)
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{
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return x >= 1 && x <= 5 ? 1 << x : 0;
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}
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static int seed_pow2(int x)
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{
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return x >= 1 && x <= 4 ? 1 << x : 1;
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}
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static int bias(int x, int c)
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{
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if (x < 0)
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return x - c;
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else if (x > 0)
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return x + c;
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else
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return 0;
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}
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static void seed_codebooks(VqcContext * s, const int * seed)
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{
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int book1 = -256 * seed[3];
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int book2 = -128 * seed[4];
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int book3 = -128 * seed[5];
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int book4 = -128 * seed[6];
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for (int i = -128; i < 128; i++) {
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s->codebook[0][(uint8_t)i] = book1;
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s->codebook[1][(uint8_t)i] = bias(book2, seed[0]);
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s->codebook[2][(uint8_t)i] = bias(book3, seed[1]);
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s->codebook[3][(uint8_t)i] = bias(book4, seed[2]);
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book1 += 2 * seed[3];
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book2 += seed[4];
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book3 += seed[5];
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book4 += seed[6];
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}
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}
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static void decode_vectors(VqcContext * s, const uint8_t * buf, int size, int width, int height)
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{
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GetBitContext gb;
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uint8_t * vectors = s->vectors;
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uint8_t * vectors_end = s->vectors + (width * height * 3) / 2;
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memset(vectors, 0, 3 * width * height / 2);
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init_get_bits8(&gb, buf, size);
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for (int i = 0; i < 3 * width * height / 2 / 32; i++) {
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uint8_t * dst = vectors;
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int symbol;
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*dst++ = get_bits(&gb, 8);
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*dst++ = get_bits(&gb, 8);
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while (show_bits(&gb, 2) != 2) {
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if (dst >= vectors_end - 1)
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return;
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if (!show_bits(&gb, 4)) {
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*dst++ = 0;
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*dst++ = 0;
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skip_bits(&gb, 4);
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continue;
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}
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symbol = get_vlc2(&gb, vector_vlc.table, VECTOR_VLC_BITS, 1);
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switch(symbol) {
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case SKIP_3: dst += 3; break;
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case SKIP_4: dst += 4; break;
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case SKIP_5: dst += 5; break;
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case SKIP_6: dst += 6; break;
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case SIGNED_8BIT: *dst++ = get_sbits(&gb, 8); break;
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case SIGNED_6BIT: *dst++ = get_sbits(&gb, 6); break;
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default:
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*dst++ = symbol;
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}
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}
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skip_bits(&gb, 2);
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vectors += 32;
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}
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}
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static void load_coeffs(VqcContext * s, const uint8_t * v, int width, int coeff_width)
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{
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int16_t * c0 = s->coeff;
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int16_t * c1 = s->coeff + coeff_width;
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int16_t * c0_125 = s->coeff + (coeff_width >> 3);
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int16_t * c1_125 = s->coeff + coeff_width + (coeff_width >> 3);
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int16_t * c0_25 = s->coeff + (coeff_width >> 2);
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int16_t * c1_25 = s->coeff + coeff_width + (coeff_width >> 2);
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int16_t * c0_5 = s->coeff + (coeff_width >> 1);
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int16_t * c1_5 = s->coeff + coeff_width + (coeff_width >> 1);
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for (int i = 0; i < width; i++) {
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c0[0] = s->codebook[0][v[0]];
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c0[1] = s->codebook[0][v[1]];
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c0 += 2;
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c1[0] = s->codebook[0][v[2]];
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c1[1] = s->codebook[0][v[3]];
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c1 += 2;
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c0_125[0] = s->codebook[1][v[4]];
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c0_125[1] = s->codebook[1][v[5]];
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c0_125 += 2;
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c1_125[0] = s->codebook[1][v[6]];
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c1_125[1] = s->codebook[1][v[7]];
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c1_125 += 2;
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c0_25[0] = s->codebook[2][v[8]];
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c0_25[1] = s->codebook[2][v[9]];
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c0_25[2] = s->codebook[2][v[10]];
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c0_25[3] = s->codebook[2][v[11]];
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c0_25 += 4;
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c1_25[0] = s->codebook[2][v[12]];
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c1_25[1] = s->codebook[2][v[13]];
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c1_25[2] = s->codebook[2][v[14]];
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c1_25[3] = s->codebook[2][v[15]];
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c1_25 += 4;
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if (v[16] | v[17] | v[18] | v[19]) {
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c0_5[0] = s->codebook[3][v[16]];
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c0_5[1] = s->codebook[3][v[17]];
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c0_5[2] = s->codebook[3][v[18]];
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c0_5[3] = s->codebook[3][v[19]];
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} else {
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c0_5[0] = c0_5[1] = c0_5[2] = c0_5[3] = 0;
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}
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if (v[20] | v[21] | v[22] | v[23]) {
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c0_5[4] = s->codebook[3][v[20]];
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c0_5[5] = s->codebook[3][v[21]];
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c0_5[6] = s->codebook[3][v[22]];
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c0_5[7] = s->codebook[3][v[23]];
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} else {
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c0_5[4] = c0_5[5] = c0_5[6] = c0_5[7] = 0;
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}
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c0_5 += 8;
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if (v[24] | v[25] | v[26] | v[27]) {
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c1_5[0] = s->codebook[3][v[24]];
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c1_5[1] = s->codebook[3][v[25]];
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c1_5[2] = s->codebook[3][v[26]];
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c1_5[3] = s->codebook[3][v[27]];
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} else {
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c1_5[0] = c1_5[1] = c1_5[2] = c1_5[3] = 0;
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}
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if (v[28] | v[29] | v[30] | v[31]) {
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c1_5[4] = s->codebook[3][v[28]];
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c1_5[5] = s->codebook[3][v[29]];
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c1_5[6] = s->codebook[3][v[30]];
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c1_5[7] = s->codebook[3][v[31]];
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} else {
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c1_5[4] = c1_5[5] = c1_5[6] = c1_5[7] = 0;
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}
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c1_5 += 8;
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v += 32;
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}
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}
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static void transform1(const int16_t * a, const int16_t * b, int16_t * dst, int width)
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{
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int s0 = a[0] + (b[0] >> 1);
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for (int i = 0; i < width / 2 - 1; i++) {
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dst[i * 2] = s0;
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s0 = a[i + 1] + ((b[i] + b[i + 1]) >> 1);
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dst[i * 2 + 1] = ((dst[i * 2] + s0) >> 1) - 2 * b[i];
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}
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dst[width - 2] = s0;
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dst[width - 1] = a[width / 2 - 1] + ((b[width / 2 - 2] - 2 * b[width / 2 - 1]) >> 2) - b[width / 2 - 1];
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}
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static uint8_t clip(int x)
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{
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return x >= -128 ? x <= 127 ? x + 0x80 : 0x00 : 0xFF;
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}
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static void transform2(const int16_t * a, const int16_t * b, uint8_t * dst, int width)
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{
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int s0 = a[0] + (b[0] >> 1);
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int tmp;
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for (int i = 0; i < width / 2 - 1; i++) {
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dst[i * 2] = av_clip_uint8(s0 + 0x80);
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tmp = a[i + 1] + ((b[i] + b[i + 1]) >> 1);
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dst[i * 2 + 1] = av_clip_uint8(((tmp + s0) >> 1) - 2 * b[i] + 0x80);
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s0 = tmp;
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}
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dst[width - 2] = clip(s0);
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dst[width - 1] = clip(a[width / 2 - 1] + ((b[width / 2 - 2] - 2 * b[width / 2 - 1]) >> 2) - b[width / 2 - 1]);
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}
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static void decode_strip(VqcContext * s, uint8_t * dst, int stride, int width)
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{
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const int16_t * coeff;
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for (int i = 0; i < width; i++) {
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int v0 = s->coeff[i];
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int v1 = s->coeff[width + i];
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s->coeff[i] = v0 - v1;
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s->coeff[width + i] = v0 + v1;
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}
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coeff = s->coeff;
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transform1(coeff, coeff + width / 8, s->tmp1, width / 4);
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transform1(s->tmp1, coeff + width / 4, s->tmp2, width / 2);
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transform2(s->tmp2, coeff + width / 2, dst, width);
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coeff += width;
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dst += stride;
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transform1(coeff, coeff + width / 8, s->tmp1, width / 4);
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transform1(s->tmp1, coeff + width / 4, s->tmp2, width / 2);
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transform2(s->tmp2, coeff + width / 2, dst, width);
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}
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static void decode_frame(VqcContext * s, int width, int height)
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{
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uint8_t * vectors = s->vectors;
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uint8_t * y = s->frame->data[0];
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uint8_t * u = s->frame->data[1];
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uint8_t * v = s->frame->data[2];
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for (int j = 0; j < height / 4; j++) {
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load_coeffs(s, vectors, width / 16, width);
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decode_strip(s, y, s->frame->linesize[0], width);
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vectors += 2 * width;
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y += 2 * s->frame->linesize[0];
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load_coeffs(s, vectors, width / 32, width / 2);
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decode_strip(s, u, s->frame->linesize[1], width / 2);
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vectors += width;
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u += 2 * s->frame->linesize[1];
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|
||||
load_coeffs(s, vectors, width / 16, width);
|
||||
decode_strip(s, y, s->frame->linesize[0], width);
|
||||
vectors += 2 * width;
|
||||
y += 2 * s->frame->linesize[0];
|
||||
|
||||
load_coeffs(s, vectors, width / 32, width / 2);
|
||||
decode_strip(s, v, s->frame->linesize[2], width / 2);
|
||||
vectors += width;
|
||||
v += 2 * s->frame->linesize[2];
|
||||
}
|
||||
}
|
||||
|
||||
static int vqc_decode_frame(AVCodecContext *avctx, AVFrame * rframe,
|
||||
int * got_frame, AVPacket * avpkt)
|
||||
{
|
||||
VqcContext *s = avctx->priv_data;
|
||||
int ret;
|
||||
const uint8_t * buf = avpkt->data;
|
||||
int cache, seed[7], gamma, contrast;
|
||||
|
||||
if (avpkt->size < 7)
|
||||
return AVERROR_INVALIDDATA;
|
||||
|
||||
if ((ret = ff_reget_buffer(avctx, s->frame, 0)) < 0)
|
||||
return ret;
|
||||
|
||||
av_log(avctx, AV_LOG_DEBUG, "VQC%d format\n", (buf[2] & 1) + 1);
|
||||
|
||||
if (((buf[0] >> 1) & 7) != 5) {
|
||||
avpriv_request_sample(avctx, "subversion != 5\n");
|
||||
return AVERROR_PATCHWELCOME;
|
||||
}
|
||||
|
||||
cache = AV_RL24(buf + 4);
|
||||
seed[2] = seed_pow1((cache >> 1) & 7);
|
||||
seed[1] = seed_pow1((cache >> 4) & 7);
|
||||
seed[0] = seed_pow1((cache >> 7) & 7);
|
||||
seed[6] = seed_pow2((cache >> 10) & 7);
|
||||
seed[5] = seed_pow2((cache >> 13) & 7);
|
||||
seed[4] = seed_pow2((cache >> 16) & 7);
|
||||
seed[3] = seed_pow2((cache >> 19) & 7);
|
||||
|
||||
gamma = buf[0] >> 4;
|
||||
contrast = AV_RL16(buf + 2) >> 1;
|
||||
if (gamma || contrast)
|
||||
avpriv_request_sample(avctx, "gamma=0x%x, contrast=0x%x\n", gamma, contrast);
|
||||
|
||||
seed_codebooks(s, seed);
|
||||
decode_vectors(s, buf + 7, avpkt->size - 7, avctx->width, avctx->height);
|
||||
decode_frame(s, avctx->width, avctx->height);
|
||||
|
||||
if ((ret = av_frame_ref(rframe, s->frame)) < 0)
|
||||
return ret;
|
||||
|
||||
*got_frame = 1;
|
||||
|
||||
return avpkt->size;
|
||||
}
|
||||
|
||||
static av_cold int vqc_decode_end(AVCodecContext * avctx)
|
||||
{
|
||||
VqcContext *s = avctx->priv_data;
|
||||
|
||||
av_freep(&s->vectors);
|
||||
av_freep(&s->coeff);
|
||||
av_freep(&s->tmp1);
|
||||
av_freep(&s->tmp2);
|
||||
av_frame_free(&s->frame);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
const FFCodec ff_vqc_decoder = {
|
||||
.p.name = "vqc",
|
||||
CODEC_LONG_NAME("ViewQuest VQC"),
|
||||
.p.type = AVMEDIA_TYPE_VIDEO,
|
||||
.p.id = AV_CODEC_ID_VQC,
|
||||
.priv_data_size = sizeof(VqcContext),
|
||||
.init = vqc_decode_init,
|
||||
.close = vqc_decode_end,
|
||||
FF_CODEC_DECODE_CB(vqc_decode_frame),
|
||||
.p.capabilities = AV_CODEC_CAP_DR1,
|
||||
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
|
||||
};
|
||||
@ -499,6 +499,8 @@ const AVCodecTag ff_codec_bmp_tags[] = {
|
||||
{ AV_CODEC_ID_MVHA, MKTAG('M', 'V', 'H', 'A') },
|
||||
{ AV_CODEC_ID_MV30, MKTAG('M', 'V', '3', '0') },
|
||||
{ AV_CODEC_ID_NOTCHLC, MKTAG('n', 'l', 'c', '1') },
|
||||
{ AV_CODEC_ID_VQC, MKTAG('V', 'Q', 'C', '1') },
|
||||
{ AV_CODEC_ID_VQC, MKTAG('V', 'Q', 'C', '2') },
|
||||
{ AV_CODEC_ID_NONE, 0 }
|
||||
};
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user