mirror of https://git.ffmpeg.org/ffmpeg.git
1685 lines
57 KiB
C
1685 lines
57 KiB
C
/*
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* MJPEG decoder
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* Copyright (c) 2000, 2001 Fabrice Bellard
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* Copyright (c) 2003 Alex Beregszaszi
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* Copyright (c) 2003-2004 Michael Niedermayer
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*
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* Support for external huffman table, various fixes (AVID workaround),
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* aspecting, new decode_frame mechanism and apple mjpeg-b support
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* by Alex Beregszaszi
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*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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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/**
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* @file
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* MJPEG decoder.
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*/
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// #define DEBUG
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#include <assert.h>
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#include "libavutil/imgutils.h"
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#include "libavutil/opt.h"
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#include "avcodec.h"
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#include "dsputil.h"
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#include "mjpeg.h"
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#include "mjpegdec.h"
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#include "jpeglsdec.h"
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static int build_vlc(VLC *vlc, const uint8_t *bits_table,
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const uint8_t *val_table, int nb_codes,
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int use_static, int is_ac)
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{
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uint8_t huff_size[256];
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uint16_t huff_code[256];
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uint16_t huff_sym[256];
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int i;
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assert(nb_codes <= 256);
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memset(huff_size, 0, sizeof(huff_size));
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ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
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for (i = 0; i < 256; i++)
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huff_sym[i] = i + 16 * is_ac;
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if (is_ac)
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huff_sym[0] = 16 * 256;
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return init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1,
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huff_code, 2, 2, huff_sym, 2, 2, use_static);
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}
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static void build_basic_mjpeg_vlc(MJpegDecodeContext *s)
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{
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build_vlc(&s->vlcs[0][0], ff_mjpeg_bits_dc_luminance,
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ff_mjpeg_val_dc, 12, 0, 0);
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build_vlc(&s->vlcs[0][1], ff_mjpeg_bits_dc_chrominance,
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ff_mjpeg_val_dc, 12, 0, 0);
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build_vlc(&s->vlcs[1][0], ff_mjpeg_bits_ac_luminance,
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ff_mjpeg_val_ac_luminance, 251, 0, 1);
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build_vlc(&s->vlcs[1][1], ff_mjpeg_bits_ac_chrominance,
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ff_mjpeg_val_ac_chrominance, 251, 0, 1);
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build_vlc(&s->vlcs[2][0], ff_mjpeg_bits_ac_luminance,
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ff_mjpeg_val_ac_luminance, 251, 0, 0);
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build_vlc(&s->vlcs[2][1], ff_mjpeg_bits_ac_chrominance,
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ff_mjpeg_val_ac_chrominance, 251, 0, 0);
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}
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av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
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{
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MJpegDecodeContext *s = avctx->priv_data;
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if (!s->picture_ptr)
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s->picture_ptr = &s->picture;
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s->avctx = avctx;
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dsputil_init(&s->dsp, avctx);
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ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
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s->buffer_size = 0;
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s->buffer = NULL;
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s->start_code = -1;
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s->first_picture = 1;
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s->org_height = avctx->coded_height;
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avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
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build_basic_mjpeg_vlc(s);
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if (s->extern_huff) {
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av_log(avctx, AV_LOG_INFO, "mjpeg: using external huffman table\n");
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init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
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if (ff_mjpeg_decode_dht(s)) {
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av_log(avctx, AV_LOG_ERROR,
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"mjpeg: error using external huffman table\n");
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return AVERROR_INVALIDDATA;
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}
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}
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if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
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s->interlace_polarity = 1; /* bottom field first */
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av_log(avctx, AV_LOG_DEBUG, "mjpeg bottom field first\n");
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}
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if (avctx->codec->id == CODEC_ID_AMV)
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s->flipped = 1;
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return 0;
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}
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/* quantize tables */
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int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
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{
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int len, index, i, j;
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len = get_bits(&s->gb, 16) - 2;
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while (len >= 65) {
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/* only 8 bit precision handled */
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if (get_bits(&s->gb, 4) != 0) {
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av_log(s->avctx, AV_LOG_ERROR, "dqt: 16bit precision\n");
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return -1;
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}
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index = get_bits(&s->gb, 4);
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if (index >= 4)
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return -1;
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av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
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/* read quant table */
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for (i = 0; i < 64; i++) {
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j = s->scantable.permutated[i];
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s->quant_matrixes[index][j] = get_bits(&s->gb, 8);
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}
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// XXX FIXME finetune, and perhaps add dc too
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s->qscale[index] = FFMAX(s->quant_matrixes[index][s->scantable.permutated[1]],
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s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
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av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
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index, s->qscale[index]);
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len -= 65;
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}
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return 0;
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}
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/* decode huffman tables and build VLC decoders */
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int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
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{
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int len, index, i, class, n, v, code_max;
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uint8_t bits_table[17];
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uint8_t val_table[256];
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len = get_bits(&s->gb, 16) - 2;
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while (len > 0) {
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if (len < 17)
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return -1;
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class = get_bits(&s->gb, 4);
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if (class >= 2)
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return -1;
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index = get_bits(&s->gb, 4);
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if (index >= 4)
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return -1;
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n = 0;
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for (i = 1; i <= 16; i++) {
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bits_table[i] = get_bits(&s->gb, 8);
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n += bits_table[i];
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}
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len -= 17;
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if (len < n || n > 256)
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return -1;
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code_max = 0;
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for (i = 0; i < n; i++) {
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v = get_bits(&s->gb, 8);
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if (v > code_max)
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code_max = v;
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val_table[i] = v;
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}
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len -= n;
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/* build VLC and flush previous vlc if present */
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free_vlc(&s->vlcs[class][index]);
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av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
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class, index, code_max + 1);
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if (build_vlc(&s->vlcs[class][index], bits_table, val_table,
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code_max + 1, 0, class > 0) < 0)
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return -1;
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if (class > 0) {
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free_vlc(&s->vlcs[2][index]);
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if (build_vlc(&s->vlcs[2][index], bits_table, val_table,
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code_max + 1, 0, 0) < 0)
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return -1;
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}
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}
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return 0;
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}
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int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
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{
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int len, nb_components, i, width, height, pix_fmt_id;
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/* XXX: verify len field validity */
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len = get_bits(&s->gb, 16);
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s->bits = get_bits(&s->gb, 8);
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if (s->pegasus_rct)
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s->bits = 9;
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if (s->bits == 9 && !s->pegasus_rct)
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s->rct = 1; // FIXME ugly
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if (s->bits != 8 && !s->lossless) {
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av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\n");
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return -1;
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}
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height = get_bits(&s->gb, 16);
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width = get_bits(&s->gb, 16);
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// HACK for odd_height.mov
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if (s->interlaced && s->width == width && s->height == height + 1)
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height= s->height;
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av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
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if (av_image_check_size(width, height, 0, s->avctx))
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return -1;
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nb_components = get_bits(&s->gb, 8);
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if (nb_components <= 0 ||
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nb_components > MAX_COMPONENTS)
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return -1;
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if (s->ls && !(s->bits <= 8 || nb_components == 1)) {
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av_log(s->avctx, AV_LOG_ERROR,
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"only <= 8 bits/component or 16-bit gray accepted for JPEG-LS\n");
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return -1;
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}
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s->nb_components = nb_components;
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s->h_max = 1;
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s->v_max = 1;
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for (i = 0; i < nb_components; i++) {
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/* component id */
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s->component_id[i] = get_bits(&s->gb, 8) - 1;
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s->h_count[i] = get_bits(&s->gb, 4);
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s->v_count[i] = get_bits(&s->gb, 4);
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/* compute hmax and vmax (only used in interleaved case) */
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if (s->h_count[i] > s->h_max)
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s->h_max = s->h_count[i];
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if (s->v_count[i] > s->v_max)
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s->v_max = s->v_count[i];
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s->quant_index[i] = get_bits(&s->gb, 8);
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if (s->quant_index[i] >= 4)
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return -1;
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av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
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i, s->h_count[i], s->v_count[i],
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s->component_id[i], s->quant_index[i]);
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}
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if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
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av_log(s->avctx, AV_LOG_ERROR,
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"Subsampling in JPEG-LS is not supported.\n");
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return -1;
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}
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if (s->v_max == 1 && s->h_max == 1 && s->lossless == 1)
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s->rgb = 1;
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/* if different size, realloc/alloc picture */
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/* XXX: also check h_count and v_count */
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if (width != s->width || height != s->height) {
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av_freep(&s->qscale_table);
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s->width = width;
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s->height = height;
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s->interlaced = 0;
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/* test interlaced mode */
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if (s->first_picture &&
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s->org_height != 0 &&
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s->height < ((s->org_height * 3) / 4)) {
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s->interlaced = 1;
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s->bottom_field = s->interlace_polarity;
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s->picture_ptr->interlaced_frame = 1;
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s->picture_ptr->top_field_first = !s->interlace_polarity;
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height *= 2;
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}
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avcodec_set_dimensions(s->avctx, width, height);
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s->qscale_table = av_mallocz((s->width + 15) / 16);
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s->first_picture = 0;
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}
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if (s->interlaced && (s->bottom_field == !s->interlace_polarity))
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return 0;
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/* XXX: not complete test ! */
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pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
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(s->h_count[1] << 20) | (s->v_count[1] << 16) |
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(s->h_count[2] << 12) | (s->v_count[2] << 8) |
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(s->h_count[3] << 4) | s->v_count[3];
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av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
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/* NOTE we do not allocate pictures large enough for the possible
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* padding of h/v_count being 4 */
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if (!(pix_fmt_id & 0xD0D0D0D0))
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pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
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if (!(pix_fmt_id & 0x0D0D0D0D))
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pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
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switch (pix_fmt_id) {
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case 0x11111100:
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if (s->rgb)
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s->avctx->pix_fmt = PIX_FMT_BGRA;
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else
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s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV444P : PIX_FMT_YUVJ444P;
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assert(s->nb_components == 3);
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break;
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case 0x11000000:
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s->avctx->pix_fmt = PIX_FMT_GRAY8;
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break;
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case 0x12111100:
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s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV440P : PIX_FMT_YUVJ440P;
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break;
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case 0x21111100:
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s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV422P : PIX_FMT_YUVJ422P;
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break;
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case 0x22111100:
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s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV420P : PIX_FMT_YUVJ420P;
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break;
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default:
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av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
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return -1;
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}
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if (s->ls) {
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if (s->nb_components > 1)
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s->avctx->pix_fmt = PIX_FMT_RGB24;
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else if (s->bits <= 8)
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s->avctx->pix_fmt = PIX_FMT_GRAY8;
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else
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s->avctx->pix_fmt = PIX_FMT_GRAY16;
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}
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if (s->picture_ptr->data[0])
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s->avctx->release_buffer(s->avctx, s->picture_ptr);
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if (s->avctx->get_buffer(s->avctx, s->picture_ptr) < 0) {
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av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
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return -1;
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}
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s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
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s->picture_ptr->key_frame = 1;
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s->got_picture = 1;
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for (i = 0; i < 3; i++)
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s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
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// printf("%d %d %d %d %d %d\n",
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// s->width, s->height, s->linesize[0], s->linesize[1],
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// s->interlaced, s->avctx->height);
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if (len != (8 + (3 * nb_components)))
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av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
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/* totally blank picture as progressive JPEG will only add details to it */
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if (s->progressive) {
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int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
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int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
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for (i = 0; i < s->nb_components; i++) {
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int size = bw * bh * s->h_count[i] * s->v_count[i];
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av_freep(&s->blocks[i]);
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av_freep(&s->last_nnz[i]);
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s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
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s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
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s->block_stride[i] = bw * s->h_count[i];
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}
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memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
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}
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return 0;
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}
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static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
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{
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int code;
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code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
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if (code < 0) {
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av_log(s->avctx, AV_LOG_WARNING,
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"mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
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0, dc_index, &s->vlcs[0][dc_index]);
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return 0xffff;
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}
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if (code)
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return get_xbits(&s->gb, code);
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else
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return 0;
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}
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/* decode block and dequantize */
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static int decode_block(MJpegDecodeContext *s, DCTELEM *block, int component,
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int dc_index, int ac_index, int16_t *quant_matrix)
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{
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int code, i, j, level, val;
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/* DC coef */
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val = mjpeg_decode_dc(s, dc_index);
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if (val == 0xffff) {
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av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
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return -1;
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}
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val = val * quant_matrix[0] + s->last_dc[component];
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s->last_dc[component] = val;
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block[0] = val;
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/* AC coefs */
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i = 0;
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{OPEN_READER(re, &s->gb);
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do {
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UPDATE_CACHE(re, &s->gb);
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GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
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i += ((unsigned)code) >> 4;
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code &= 0xf;
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if (code) {
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if (code > MIN_CACHE_BITS - 16)
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UPDATE_CACHE(re, &s->gb);
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{
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int cache = GET_CACHE(re, &s->gb);
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int sign = (~cache) >> 31;
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level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
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}
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LAST_SKIP_BITS(re, &s->gb, code);
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if (i > 63) {
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av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
|
|
return -1;
|
|
}
|
|
j = s->scantable.permutated[i];
|
|
block[j] = level * quant_matrix[j];
|
|
}
|
|
} while (i < 63);
|
|
CLOSE_READER(re, &s->gb);}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int decode_dc_progressive(MJpegDecodeContext *s, DCTELEM *block,
|
|
int component, int dc_index,
|
|
int16_t *quant_matrix, int Al)
|
|
{
|
|
int val;
|
|
s->dsp.clear_block(block);
|
|
val = mjpeg_decode_dc(s, dc_index);
|
|
if (val == 0xffff) {
|
|
av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
|
|
return -1;
|
|
}
|
|
val = (val * quant_matrix[0] << Al) + s->last_dc[component];
|
|
s->last_dc[component] = val;
|
|
block[0] = val;
|
|
return 0;
|
|
}
|
|
|
|
/* decode block and dequantize - progressive JPEG version */
|
|
static int decode_block_progressive(MJpegDecodeContext *s, DCTELEM *block,
|
|
uint8_t *last_nnz, int ac_index,
|
|
int16_t *quant_matrix,
|
|
int ss, int se, int Al, int *EOBRUN)
|
|
{
|
|
int code, i, j, level, val, run;
|
|
|
|
if (*EOBRUN) {
|
|
(*EOBRUN)--;
|
|
return 0;
|
|
}
|
|
|
|
{
|
|
OPEN_READER(re, &s->gb);
|
|
for (i = ss; ; i++) {
|
|
UPDATE_CACHE(re, &s->gb);
|
|
GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
|
|
|
|
run = ((unsigned) code) >> 4;
|
|
code &= 0xF;
|
|
if (code) {
|
|
i += run;
|
|
if (code > MIN_CACHE_BITS - 16)
|
|
UPDATE_CACHE(re, &s->gb);
|
|
|
|
{
|
|
int cache = GET_CACHE(re, &s->gb);
|
|
int sign = (~cache) >> 31;
|
|
level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
|
|
}
|
|
|
|
LAST_SKIP_BITS(re, &s->gb, code);
|
|
|
|
if (i >= se) {
|
|
if (i == se) {
|
|
j = s->scantable.permutated[se];
|
|
block[j] = level * quant_matrix[j] << Al;
|
|
break;
|
|
}
|
|
av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
|
|
return -1;
|
|
}
|
|
j = s->scantable.permutated[i];
|
|
block[j] = level * quant_matrix[j] << Al;
|
|
} else {
|
|
if (run == 0xF) {// ZRL - skip 15 coefficients
|
|
i += 15;
|
|
if (i >= se) {
|
|
av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
|
|
return -1;
|
|
}
|
|
} else {
|
|
val = (1 << run);
|
|
if (run) {
|
|
UPDATE_CACHE(re, &s->gb);
|
|
val += NEG_USR32(GET_CACHE(re, &s->gb), run);
|
|
LAST_SKIP_BITS(re, &s->gb, run);
|
|
}
|
|
*EOBRUN = val - 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
CLOSE_READER(re, &s->gb);
|
|
}
|
|
|
|
if (i > *last_nnz)
|
|
*last_nnz = i;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define REFINE_BIT(j) { \
|
|
UPDATE_CACHE(re, &s->gb); \
|
|
sign = block[j] >> 15; \
|
|
block[j] += SHOW_UBITS(re, &s->gb, 1) * \
|
|
((quant_matrix[j] ^ sign) - sign) << Al; \
|
|
LAST_SKIP_BITS(re, &s->gb, 1); \
|
|
}
|
|
|
|
#define ZERO_RUN \
|
|
for (; ; i++) { \
|
|
if (i > last) { \
|
|
i += run; \
|
|
if (i > se) { \
|
|
av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
|
|
return -1; \
|
|
} \
|
|
break; \
|
|
} \
|
|
j = s->scantable.permutated[i]; \
|
|
if (block[j]) \
|
|
REFINE_BIT(j) \
|
|
else if (run-- == 0) \
|
|
break; \
|
|
}
|
|
|
|
/* decode block and dequantize - progressive JPEG refinement pass */
|
|
static int decode_block_refinement(MJpegDecodeContext *s, DCTELEM *block,
|
|
uint8_t *last_nnz,
|
|
int ac_index, int16_t *quant_matrix,
|
|
int ss, int se, int Al, int *EOBRUN)
|
|
{
|
|
int code, i = ss, j, sign, val, run;
|
|
int last = FFMIN(se, *last_nnz);
|
|
|
|
OPEN_READER(re, &s->gb);
|
|
if (*EOBRUN) {
|
|
(*EOBRUN)--;
|
|
} else {
|
|
for (; ; i++) {
|
|
UPDATE_CACHE(re, &s->gb);
|
|
GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
|
|
|
|
if (code & 0xF) {
|
|
run = ((unsigned) code) >> 4;
|
|
UPDATE_CACHE(re, &s->gb);
|
|
val = SHOW_UBITS(re, &s->gb, 1);
|
|
LAST_SKIP_BITS(re, &s->gb, 1);
|
|
ZERO_RUN;
|
|
j = s->scantable.permutated[i];
|
|
val--;
|
|
block[j] = ((quant_matrix[j]^val) - val) << Al;
|
|
if (i == se) {
|
|
if (i > *last_nnz)
|
|
*last_nnz = i;
|
|
CLOSE_READER(re, &s->gb);
|
|
return 0;
|
|
}
|
|
} else {
|
|
run = ((unsigned) code) >> 4;
|
|
if (run == 0xF) {
|
|
ZERO_RUN;
|
|
} else {
|
|
val = run;
|
|
run = (1 << run);
|
|
if (val) {
|
|
UPDATE_CACHE(re, &s->gb);
|
|
run += SHOW_UBITS(re, &s->gb, val);
|
|
LAST_SKIP_BITS(re, &s->gb, val);
|
|
}
|
|
*EOBRUN = run - 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (i > *last_nnz)
|
|
*last_nnz = i;
|
|
}
|
|
|
|
for (; i <= last; i++) {
|
|
j = s->scantable.permutated[i];
|
|
if (block[j])
|
|
REFINE_BIT(j)
|
|
}
|
|
CLOSE_READER(re, &s->gb);
|
|
|
|
return 0;
|
|
}
|
|
#undef REFINE_BIT
|
|
#undef ZERO_RUN
|
|
|
|
static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor,
|
|
int point_transform)
|
|
{
|
|
int i, mb_x, mb_y;
|
|
uint16_t (*buffer)[4];
|
|
int left[3], top[3], topleft[3];
|
|
const int linesize = s->linesize[0];
|
|
const int mask = (1 << s->bits) - 1;
|
|
|
|
av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
|
|
(unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
|
|
buffer = s->ljpeg_buffer;
|
|
|
|
for (i = 0; i < 3; i++)
|
|
buffer[0][i] = 1 << (s->bits + point_transform - 1);
|
|
|
|
for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
|
|
const int modified_predictor = mb_y ? predictor : 1;
|
|
uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
|
|
|
|
if (s->interlaced && s->bottom_field)
|
|
ptr += linesize >> 1;
|
|
|
|
for (i = 0; i < 3; i++)
|
|
top[i] = left[i] = topleft[i] = buffer[0][i];
|
|
|
|
for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
|
|
if (s->restart_interval && !s->restart_count)
|
|
s->restart_count = s->restart_interval;
|
|
|
|
for (i = 0; i < 3; i++) {
|
|
int pred;
|
|
|
|
topleft[i] = top[i];
|
|
top[i] = buffer[mb_x][i];
|
|
|
|
PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
|
|
|
|
left[i] = buffer[mb_x][i] =
|
|
mask & (pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform));
|
|
}
|
|
|
|
if (s->restart_interval && !--s->restart_count) {
|
|
align_get_bits(&s->gb);
|
|
skip_bits(&s->gb, 16); /* skip RSTn */
|
|
}
|
|
}
|
|
|
|
if (s->rct) {
|
|
for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
|
|
ptr[4 * mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
|
|
ptr[4 * mb_x + 0] = buffer[mb_x][1] + ptr[4 * mb_x + 1];
|
|
ptr[4 * mb_x + 2] = buffer[mb_x][2] + ptr[4 * mb_x + 1];
|
|
}
|
|
} else if (s->pegasus_rct) {
|
|
for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
|
|
ptr[4 * mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
|
|
ptr[4 * mb_x + 0] = buffer[mb_x][1] + ptr[4 * mb_x + 1];
|
|
ptr[4 * mb_x + 2] = buffer[mb_x][2] + ptr[4 * mb_x + 1];
|
|
}
|
|
} else {
|
|
for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
|
|
ptr[4 * mb_x + 0] = buffer[mb_x][2];
|
|
ptr[4 * mb_x + 1] = buffer[mb_x][1];
|
|
ptr[4 * mb_x + 2] = buffer[mb_x][0];
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
|
|
int point_transform)
|
|
{
|
|
int i, mb_x, mb_y;
|
|
const int nb_components = 3;
|
|
|
|
for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
|
|
for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
|
|
if (s->restart_interval && !s->restart_count)
|
|
s->restart_count = s->restart_interval;
|
|
|
|
if (mb_x == 0 || mb_y == 0 || s->interlaced) {
|
|
for (i = 0; i < nb_components; i++) {
|
|
uint8_t *ptr;
|
|
int n, h, v, x, y, c, j, linesize;
|
|
n = s->nb_blocks[i];
|
|
c = s->comp_index[i];
|
|
h = s->h_scount[i];
|
|
v = s->v_scount[i];
|
|
x = 0;
|
|
y = 0;
|
|
linesize = s->linesize[c];
|
|
|
|
for (j = 0; j < n; j++) {
|
|
int pred;
|
|
// FIXME optimize this crap
|
|
ptr = s->picture_ptr->data[c] +
|
|
(linesize * (v * mb_y + y)) +
|
|
(h * mb_x + x);
|
|
if (y == 0 && mb_y == 0) {
|
|
if (x == 0 && mb_x == 0)
|
|
pred = 128 << point_transform;
|
|
else
|
|
pred = ptr[-1];
|
|
} else {
|
|
if (x == 0 && mb_x == 0)
|
|
pred = ptr[-linesize];
|
|
else
|
|
PREDICT(pred, ptr[-linesize - 1],
|
|
ptr[-linesize], ptr[-1], predictor);
|
|
}
|
|
|
|
if (s->interlaced && s->bottom_field)
|
|
ptr += linesize >> 1;
|
|
*ptr = pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
|
|
|
|
if (++x == h) {
|
|
x = 0;
|
|
y++;
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
for (i = 0; i < nb_components; i++) {
|
|
uint8_t *ptr;
|
|
int n, h, v, x, y, c, j, linesize;
|
|
n = s->nb_blocks[i];
|
|
c = s->comp_index[i];
|
|
h = s->h_scount[i];
|
|
v = s->v_scount[i];
|
|
x = 0;
|
|
y = 0;
|
|
linesize = s->linesize[c];
|
|
|
|
for (j = 0; j < n; j++) {
|
|
int pred;
|
|
|
|
// FIXME optimize this crap
|
|
ptr = s->picture_ptr->data[c] +
|
|
(linesize * (v * mb_y + y)) +
|
|
(h * mb_x + x);
|
|
PREDICT(pred, ptr[-linesize - 1],
|
|
ptr[-linesize], ptr[-1], predictor);
|
|
*ptr = pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
|
|
if (++x == h) {
|
|
x = 0;
|
|
y++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (s->restart_interval && !--s->restart_count) {
|
|
align_get_bits(&s->gb);
|
|
skip_bits(&s->gb, 16); /* skip RSTn */
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static av_always_inline void mjpeg_copy_block(uint8_t *dst, const uint8_t *src,
|
|
int linesize, int lowres)
|
|
{
|
|
switch (lowres) {
|
|
case 0: copy_block8(dst, src, linesize, linesize, 8);
|
|
break;
|
|
case 1: copy_block4(dst, src, linesize, linesize, 4);
|
|
break;
|
|
case 2: copy_block2(dst, src, linesize, linesize, 2);
|
|
break;
|
|
case 3: *dst = *src;
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
|
|
int Al, const uint8_t *mb_bitmask,
|
|
const AVFrame *reference)
|
|
{
|
|
int i, mb_x, mb_y;
|
|
uint8_t *data[MAX_COMPONENTS];
|
|
const uint8_t *reference_data[MAX_COMPONENTS];
|
|
int linesize[MAX_COMPONENTS];
|
|
GetBitContext mb_bitmask_gb;
|
|
|
|
if (mb_bitmask)
|
|
init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
|
|
|
|
if (s->flipped && s->avctx->flags & CODEC_FLAG_EMU_EDGE) {
|
|
av_log(s->avctx, AV_LOG_ERROR,
|
|
"Can not flip image with CODEC_FLAG_EMU_EDGE set!\n");
|
|
s->flipped = 0;
|
|
}
|
|
|
|
for (i = 0; i < nb_components; i++) {
|
|
int c = s->comp_index[i];
|
|
data[c] = s->picture_ptr->data[c];
|
|
reference_data[c] = reference ? reference->data[c] : NULL;
|
|
linesize[c] = s->linesize[c];
|
|
s->coefs_finished[c] |= 1;
|
|
if (s->flipped) {
|
|
// picture should be flipped upside-down for this codec
|
|
int offset = (linesize[c] * (s->v_scount[i] *
|
|
(8 * s->mb_height - ((s->height / s->v_max) & 7)) - 1));
|
|
data[c] += offset;
|
|
reference_data[c] += offset;
|
|
linesize[c] *= -1;
|
|
}
|
|
}
|
|
|
|
for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
|
|
for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
|
|
const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
|
|
|
|
if (s->restart_interval && !s->restart_count)
|
|
s->restart_count = s->restart_interval;
|
|
|
|
if (get_bits_count(&s->gb)>s->gb.size_in_bits) {
|
|
av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
|
|
get_bits_count(&s->gb) - s->gb.size_in_bits);
|
|
return -1;
|
|
}
|
|
for (i = 0; i < nb_components; i++) {
|
|
uint8_t *ptr;
|
|
int n, h, v, x, y, c, j;
|
|
int block_offset;
|
|
n = s->nb_blocks[i];
|
|
c = s->comp_index[i];
|
|
h = s->h_scount[i];
|
|
v = s->v_scount[i];
|
|
x = 0;
|
|
y = 0;
|
|
for (j = 0; j < n; j++) {
|
|
block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
|
|
(h * mb_x + x) * 8) >> s->avctx->lowres);
|
|
|
|
if (s->interlaced && s->bottom_field)
|
|
block_offset += linesize[c] >> 1;
|
|
ptr = data[c] + block_offset;
|
|
if (!s->progressive) {
|
|
if (copy_mb)
|
|
mjpeg_copy_block(ptr, reference_data[c] + block_offset,
|
|
linesize[c], s->avctx->lowres);
|
|
else {
|
|
s->dsp.clear_block(s->block);
|
|
if (decode_block(s, s->block, i,
|
|
s->dc_index[i], s->ac_index[i],
|
|
s->quant_matrixes[s->quant_index[c]]) < 0) {
|
|
av_log(s->avctx, AV_LOG_ERROR,
|
|
"error y=%d x=%d\n", mb_y, mb_x);
|
|
return -1;
|
|
}
|
|
s->dsp.idct_put(ptr, linesize[c], s->block);
|
|
}
|
|
} else {
|
|
int block_idx = s->block_stride[c] * (v * mb_y + y) +
|
|
(h * mb_x + x);
|
|
DCTELEM *block = s->blocks[c][block_idx];
|
|
if (Ah)
|
|
block[0] += get_bits1(&s->gb) *
|
|
s->quant_matrixes[s->quant_index[c]][0] << Al;
|
|
else if (decode_dc_progressive(s, block, i, s->dc_index[i],
|
|
s->quant_matrixes[s->quant_index[c]],
|
|
Al) < 0) {
|
|
av_log(s->avctx, AV_LOG_ERROR,
|
|
"error y=%d x=%d\n", mb_y, mb_x);
|
|
return -1;
|
|
}
|
|
}
|
|
// av_log(s->avctx, AV_LOG_DEBUG, "mb: %d %d processed\n",
|
|
// mb_y, mb_x);
|
|
// av_log(NULL, AV_LOG_DEBUG, "%d %d %d %d %d %d %d %d \n",
|
|
// mb_x, mb_y, x, y, c, s->bottom_field,
|
|
// (v * mb_y + y) * 8, (h * mb_x + x) * 8);
|
|
if (++x == h) {
|
|
x = 0;
|
|
y++;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (s->restart_interval) {
|
|
s->restart_count--;
|
|
i = 8 + ((-get_bits_count(&s->gb)) & 7);
|
|
/* skip RSTn */
|
|
if (show_bits(&s->gb, i) == (1 << i) - 1) {
|
|
int pos = get_bits_count(&s->gb);
|
|
align_get_bits(&s->gb);
|
|
while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
|
|
skip_bits(&s->gb, 8);
|
|
if ((get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
|
|
for (i = 0; i < nb_components; i++) /* reset dc */
|
|
s->last_dc[i] = 1024;
|
|
} else
|
|
skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
|
|
int se, int Ah, int Al,
|
|
const uint8_t *mb_bitmask,
|
|
const AVFrame *reference)
|
|
{
|
|
int mb_x, mb_y;
|
|
int EOBRUN = 0;
|
|
int c = s->comp_index[0];
|
|
uint8_t *data = s->picture_ptr->data[c];
|
|
const uint8_t *reference_data = reference ? reference->data[c] : NULL;
|
|
int linesize = s->linesize[c];
|
|
int last_scan = 0;
|
|
int16_t *quant_matrix = s->quant_matrixes[s->quant_index[c]];
|
|
GetBitContext mb_bitmask_gb;
|
|
|
|
if (mb_bitmask)
|
|
init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
|
|
|
|
if (!Al) {
|
|
s->coefs_finished[c] |= (1LL << (se + 1)) - (1LL << ss);
|
|
last_scan = !~s->coefs_finished[c];
|
|
}
|
|
|
|
if (s->interlaced && s->bottom_field) {
|
|
int offset = linesize >> 1;
|
|
data += offset;
|
|
reference_data += offset;
|
|
}
|
|
|
|
for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
|
|
int block_offset = (mb_y * linesize * 8 >> s->avctx->lowres);
|
|
uint8_t *ptr = data + block_offset;
|
|
int block_idx = mb_y * s->block_stride[c];
|
|
DCTELEM (*block)[64] = &s->blocks[c][block_idx];
|
|
uint8_t *last_nnz = &s->last_nnz[c][block_idx];
|
|
for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
|
|
const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
|
|
|
|
if (!copy_mb) {
|
|
int ret;
|
|
if (Ah)
|
|
ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
|
|
quant_matrix, ss, se, Al, &EOBRUN);
|
|
else
|
|
ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
|
|
quant_matrix, ss, se, Al, &EOBRUN);
|
|
if (ret < 0) {
|
|
av_log(s->avctx, AV_LOG_ERROR,
|
|
"error y=%d x=%d\n", mb_y, mb_x);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
if (last_scan) {
|
|
if (copy_mb) {
|
|
mjpeg_copy_block(ptr, reference_data + block_offset,
|
|
linesize, s->avctx->lowres);
|
|
} else {
|
|
s->dsp.idct_put(ptr, linesize, *block);
|
|
ptr += 8 >> s->avctx->lowres;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
|
|
const AVFrame *reference)
|
|
{
|
|
int len, nb_components, i, h, v, predictor, point_transform;
|
|
int index, id;
|
|
const int block_size = s->lossless ? 1 : 8;
|
|
int ilv, prev_shift;
|
|
|
|
/* XXX: verify len field validity */
|
|
len = get_bits(&s->gb, 16);
|
|
nb_components = get_bits(&s->gb, 8);
|
|
if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
|
|
av_log(s->avctx, AV_LOG_ERROR,
|
|
"decode_sos: nb_components (%d) unsupported\n", nb_components);
|
|
return -1;
|
|
}
|
|
if (len != 6 + 2 * nb_components) {
|
|
av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
|
|
return -1;
|
|
}
|
|
for (i = 0; i < nb_components; i++) {
|
|
id = get_bits(&s->gb, 8) - 1;
|
|
av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
|
|
/* find component index */
|
|
for (index = 0; index < s->nb_components; index++)
|
|
if (id == s->component_id[index])
|
|
break;
|
|
if (index == s->nb_components) {
|
|
av_log(s->avctx, AV_LOG_ERROR,
|
|
"decode_sos: index(%d) out of components\n", index);
|
|
return -1;
|
|
}
|
|
/* Metasoft MJPEG codec has Cb and Cr swapped */
|
|
if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
|
|
&& nb_components == 3 && s->nb_components == 3 && i)
|
|
index = 3 - i;
|
|
|
|
s->comp_index[i] = index;
|
|
|
|
s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
|
|
s->h_scount[i] = s->h_count[index];
|
|
s->v_scount[i] = s->v_count[index];
|
|
|
|
s->dc_index[i] = get_bits(&s->gb, 4);
|
|
s->ac_index[i] = get_bits(&s->gb, 4);
|
|
|
|
if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
|
|
s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
|
|
goto out_of_range;
|
|
if (!s->vlcs[0][s->dc_index[i]].table ||
|
|
!s->vlcs[1][s->ac_index[i]].table)
|
|
goto out_of_range;
|
|
}
|
|
|
|
predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
|
|
ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
|
|
prev_shift = get_bits(&s->gb, 4); /* Ah */
|
|
point_transform = get_bits(&s->gb, 4); /* Al */
|
|
|
|
for (i = 0; i < nb_components; i++)
|
|
s->last_dc[i] = 1024;
|
|
|
|
if (nb_components > 1) {
|
|
/* interleaved stream */
|
|
s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
|
|
s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
|
|
} else if (!s->ls) { /* skip this for JPEG-LS */
|
|
h = s->h_max / s->h_scount[0];
|
|
v = s->v_max / s->v_scount[0];
|
|
s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
|
|
s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
|
|
s->nb_blocks[0] = 1;
|
|
s->h_scount[0] = 1;
|
|
s->v_scount[0] = 1;
|
|
}
|
|
|
|
if (s->avctx->debug & FF_DEBUG_PICT_INFO)
|
|
av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d %s\n",
|
|
s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
|
|
predictor, point_transform, ilv, s->bits,
|
|
s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""));
|
|
|
|
|
|
/* mjpeg-b can have padding bytes between sos and image data, skip them */
|
|
for (i = s->mjpb_skiptosod; i > 0; i--)
|
|
skip_bits(&s->gb, 8);
|
|
|
|
if (s->lossless) {
|
|
if (CONFIG_JPEGLS_DECODER && s->ls) {
|
|
// for () {
|
|
// reset_ls_coding_parameters(s, 0);
|
|
|
|
if (ff_jpegls_decode_picture(s, predictor, point_transform, ilv) < 0)
|
|
return -1;
|
|
} else {
|
|
if (s->rgb) {
|
|
if (ljpeg_decode_rgb_scan(s, predictor, point_transform) < 0)
|
|
return -1;
|
|
} else {
|
|
if (ljpeg_decode_yuv_scan(s, predictor, point_transform) < 0)
|
|
return -1;
|
|
}
|
|
}
|
|
} else {
|
|
if (s->progressive && predictor) {
|
|
if (mjpeg_decode_scan_progressive_ac(s, predictor, ilv, prev_shift,
|
|
point_transform,
|
|
mb_bitmask, reference) < 0)
|
|
return -1;
|
|
} else {
|
|
if (mjpeg_decode_scan(s, nb_components, prev_shift, point_transform,
|
|
mb_bitmask, reference) < 0)
|
|
return -1;
|
|
}
|
|
}
|
|
emms_c();
|
|
return 0;
|
|
out_of_range:
|
|
av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
|
|
return -1;
|
|
}
|
|
|
|
static int mjpeg_decode_dri(MJpegDecodeContext *s)
|
|
{
|
|
if (get_bits(&s->gb, 16) != 4)
|
|
return -1;
|
|
s->restart_interval = get_bits(&s->gb, 16);
|
|
s->restart_count = 0;
|
|
av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
|
|
s->restart_interval);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mjpeg_decode_app(MJpegDecodeContext *s)
|
|
{
|
|
int len, id, i;
|
|
|
|
len = get_bits(&s->gb, 16);
|
|
if (len < 5)
|
|
return -1;
|
|
if (8 * len + get_bits_count(&s->gb) > s->gb.size_in_bits)
|
|
return -1;
|
|
|
|
id = get_bits_long(&s->gb, 32);
|
|
id = av_be2ne32(id);
|
|
len -= 6;
|
|
|
|
if (s->avctx->debug & FF_DEBUG_STARTCODE)
|
|
av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
|
|
|
|
/* Buggy AVID, it puts EOI only at every 10th frame. */
|
|
/* Also, this fourcc is used by non-avid files too, it holds some
|
|
information, but it's always present in AVID-created files. */
|
|
if (id == AV_RL32("AVI1")) {
|
|
/* structure:
|
|
4bytes AVI1
|
|
1bytes polarity
|
|
1bytes always zero
|
|
4bytes field_size
|
|
4bytes field_size_less_padding
|
|
*/
|
|
s->buggy_avid = 1;
|
|
// if (s->first_picture)
|
|
// printf("mjpeg: workarounding buggy AVID\n");
|
|
i = get_bits(&s->gb, 8);
|
|
if (i == 2)
|
|
s->bottom_field = 1;
|
|
else if (i == 1)
|
|
s->bottom_field = 0;
|
|
#if 0
|
|
skip_bits(&s->gb, 8);
|
|
skip_bits(&s->gb, 32);
|
|
skip_bits(&s->gb, 32);
|
|
len -= 10;
|
|
#endif
|
|
// if (s->interlace_polarity)
|
|
// printf("mjpeg: interlace polarity: %d\n", s->interlace_polarity);
|
|
goto out;
|
|
}
|
|
|
|
// len -= 2;
|
|
|
|
if (id == AV_RL32("JFIF")) {
|
|
int t_w, t_h, v1, v2;
|
|
skip_bits(&s->gb, 8); /* the trailing zero-byte */
|
|
v1 = get_bits(&s->gb, 8);
|
|
v2 = get_bits(&s->gb, 8);
|
|
skip_bits(&s->gb, 8);
|
|
|
|
s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
|
|
s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
|
|
|
|
if (s->avctx->debug & FF_DEBUG_PICT_INFO)
|
|
av_log(s->avctx, AV_LOG_INFO,
|
|
"mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
|
|
v1, v2,
|
|
s->avctx->sample_aspect_ratio.num,
|
|
s->avctx->sample_aspect_ratio.den);
|
|
|
|
t_w = get_bits(&s->gb, 8);
|
|
t_h = get_bits(&s->gb, 8);
|
|
if (t_w && t_h) {
|
|
/* skip thumbnail */
|
|
if (len -10 - (t_w * t_h * 3) > 0)
|
|
len -= t_w * t_h * 3;
|
|
}
|
|
len -= 10;
|
|
goto out;
|
|
}
|
|
|
|
if (id == AV_RL32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
|
|
if (s->avctx->debug & FF_DEBUG_PICT_INFO)
|
|
av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
|
|
skip_bits(&s->gb, 16); /* version */
|
|
skip_bits(&s->gb, 16); /* flags0 */
|
|
skip_bits(&s->gb, 16); /* flags1 */
|
|
skip_bits(&s->gb, 8); /* transform */
|
|
len -= 7;
|
|
goto out;
|
|
}
|
|
|
|
if (id == AV_RL32("LJIF")) {
|
|
if (s->avctx->debug & FF_DEBUG_PICT_INFO)
|
|
av_log(s->avctx, AV_LOG_INFO,
|
|
"Pegasus lossless jpeg header found\n");
|
|
skip_bits(&s->gb, 16); /* version ? */
|
|
skip_bits(&s->gb, 16); /* unknwon always 0? */
|
|
skip_bits(&s->gb, 16); /* unknwon always 0? */
|
|
skip_bits(&s->gb, 16); /* unknwon always 0? */
|
|
switch (get_bits(&s->gb, 8)) {
|
|
case 1:
|
|
s->rgb = 1;
|
|
s->pegasus_rct = 0;
|
|
break;
|
|
case 2:
|
|
s->rgb = 1;
|
|
s->pegasus_rct = 1;
|
|
break;
|
|
default:
|
|
av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
|
|
}
|
|
len -= 9;
|
|
goto out;
|
|
}
|
|
|
|
/* Apple MJPEG-A */
|
|
if ((s->start_code == APP1) && (len > (0x28 - 8))) {
|
|
id = get_bits_long(&s->gb, 32);
|
|
id = av_be2ne32(id);
|
|
len -= 4;
|
|
/* Apple MJPEG-A */
|
|
if (id == AV_RL32("mjpg")) {
|
|
#if 0
|
|
skip_bits(&s->gb, 32); /* field size */
|
|
skip_bits(&s->gb, 32); /* pad field size */
|
|
skip_bits(&s->gb, 32); /* next off */
|
|
skip_bits(&s->gb, 32); /* quant off */
|
|
skip_bits(&s->gb, 32); /* huff off */
|
|
skip_bits(&s->gb, 32); /* image off */
|
|
skip_bits(&s->gb, 32); /* scan off */
|
|
skip_bits(&s->gb, 32); /* data off */
|
|
#endif
|
|
if (s->avctx->debug & FF_DEBUG_PICT_INFO)
|
|
av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
|
|
}
|
|
}
|
|
|
|
out:
|
|
/* slow but needed for extreme adobe jpegs */
|
|
if (len < 0)
|
|
av_log(s->avctx, AV_LOG_ERROR,
|
|
"mjpeg: error, decode_app parser read over the end\n");
|
|
while (--len > 0)
|
|
skip_bits(&s->gb, 8);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mjpeg_decode_com(MJpegDecodeContext *s)
|
|
{
|
|
int len = get_bits(&s->gb, 16);
|
|
if (len >= 2 &&
|
|
8 * len - 16 + get_bits_count(&s->gb) <= s->gb.size_in_bits) {
|
|
char *cbuf = av_malloc(len - 1);
|
|
if (cbuf) {
|
|
int i;
|
|
for (i = 0; i < len - 2; i++)
|
|
cbuf[i] = get_bits(&s->gb, 8);
|
|
if (i > 0 && cbuf[i - 1] == '\n')
|
|
cbuf[i - 1] = 0;
|
|
else
|
|
cbuf[i] = 0;
|
|
|
|
if (s->avctx->debug & FF_DEBUG_PICT_INFO)
|
|
av_log(s->avctx, AV_LOG_INFO, "mjpeg comment: '%s'\n", cbuf);
|
|
|
|
/* buggy avid, it puts EOI only at every 10th frame */
|
|
if (!strcmp(cbuf, "AVID")) {
|
|
s->buggy_avid = 1;
|
|
// if (s->first_picture)
|
|
// printf("mjpeg: workarounding buggy AVID\n");
|
|
} else if (!strcmp(cbuf, "CS=ITU601"))
|
|
s->cs_itu601 = 1;
|
|
else if ((len > 20 && !strncmp(cbuf, "Intel(R) JPEG Library", 21)) ||
|
|
(len > 19 && !strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
|
|
s->flipped = 1;
|
|
|
|
av_free(cbuf);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* return the 8 bit start code value and update the search
|
|
state. Return -1 if no start code found */
|
|
static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
|
|
{
|
|
const uint8_t *buf_ptr;
|
|
unsigned int v, v2;
|
|
int val;
|
|
#ifdef DEBUG
|
|
int skipped = 0;
|
|
#endif
|
|
|
|
buf_ptr = *pbuf_ptr;
|
|
while (buf_ptr < buf_end) {
|
|
v = *buf_ptr++;
|
|
v2 = *buf_ptr;
|
|
if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
|
|
val = *buf_ptr++;
|
|
goto found;
|
|
}
|
|
#ifdef DEBUG
|
|
skipped++;
|
|
#endif
|
|
}
|
|
val = -1;
|
|
found:
|
|
av_dlog(NULL, "find_marker skipped %d bytes\n", skipped);
|
|
*pbuf_ptr = buf_ptr;
|
|
return val;
|
|
}
|
|
|
|
int ff_mjpeg_find_marker(MJpegDecodeContext *s,
|
|
const uint8_t **buf_ptr, const uint8_t *buf_end,
|
|
const uint8_t **unescaped_buf_ptr,
|
|
int *unescaped_buf_size)
|
|
{
|
|
int start_code;
|
|
start_code = find_marker(buf_ptr, buf_end);
|
|
|
|
av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr);
|
|
if (!s->buffer)
|
|
return AVERROR(ENOMEM);
|
|
|
|
/* unescape buffer of SOS, use special treatment for JPEG-LS */
|
|
if (start_code == SOS && !s->ls) {
|
|
const uint8_t *src = *buf_ptr;
|
|
uint8_t *dst = s->buffer;
|
|
|
|
while (src < buf_end) {
|
|
uint8_t x = *(src++);
|
|
|
|
*(dst++) = x;
|
|
if (s->avctx->codec_id != CODEC_ID_THP) {
|
|
if (x == 0xff) {
|
|
while (src < buf_end && x == 0xff)
|
|
x = *(src++);
|
|
|
|
if (x >= 0xd0 && x <= 0xd7)
|
|
*(dst++) = x;
|
|
else if (x)
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
*unescaped_buf_ptr = s->buffer;
|
|
*unescaped_buf_size = dst - s->buffer;
|
|
|
|
av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
|
|
(buf_end - *buf_ptr) - (dst - s->buffer));
|
|
} else if (start_code == SOS && s->ls) {
|
|
const uint8_t *src = *buf_ptr;
|
|
uint8_t *dst = s->buffer;
|
|
int bit_count = 0;
|
|
int t = 0, b = 0;
|
|
PutBitContext pb;
|
|
|
|
s->cur_scan++;
|
|
|
|
/* find marker */
|
|
while (src + t < buf_end) {
|
|
uint8_t x = src[t++];
|
|
if (x == 0xff) {
|
|
while ((src + t < buf_end) && x == 0xff)
|
|
x = src[t++];
|
|
if (x & 0x80) {
|
|
t -= 2;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
bit_count = t * 8;
|
|
init_put_bits(&pb, dst, t);
|
|
|
|
/* unescape bitstream */
|
|
while (b < t) {
|
|
uint8_t x = src[b++];
|
|
put_bits(&pb, 8, x);
|
|
if (x == 0xFF) {
|
|
x = src[b++];
|
|
put_bits(&pb, 7, x);
|
|
bit_count--;
|
|
}
|
|
}
|
|
flush_put_bits(&pb);
|
|
|
|
*unescaped_buf_ptr = dst;
|
|
*unescaped_buf_size = (bit_count + 7) >> 3;
|
|
} else {
|
|
*unescaped_buf_ptr = *buf_ptr;
|
|
*unescaped_buf_size = buf_end - *buf_ptr;
|
|
}
|
|
|
|
return start_code;
|
|
}
|
|
|
|
int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
|
|
AVPacket *avpkt)
|
|
{
|
|
const uint8_t *buf = avpkt->data;
|
|
int buf_size = avpkt->size;
|
|
MJpegDecodeContext *s = avctx->priv_data;
|
|
const uint8_t *buf_end, *buf_ptr;
|
|
const uint8_t *unescaped_buf_ptr;
|
|
int unescaped_buf_size;
|
|
int start_code;
|
|
AVFrame *picture = data;
|
|
|
|
s->got_picture = 0; // picture from previous image can not be reused
|
|
buf_ptr = buf;
|
|
buf_end = buf + buf_size;
|
|
while (buf_ptr < buf_end) {
|
|
/* find start next marker */
|
|
start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
|
|
&unescaped_buf_ptr,
|
|
&unescaped_buf_size);
|
|
/* EOF */
|
|
if (start_code < 0) {
|
|
goto the_end;
|
|
} else {
|
|
av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n",
|
|
start_code, buf_end - buf_ptr);
|
|
|
|
init_get_bits(&s->gb, unescaped_buf_ptr, unescaped_buf_size * 8);
|
|
|
|
s->start_code = start_code;
|
|
if (s->avctx->debug & FF_DEBUG_STARTCODE)
|
|
av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
|
|
|
|
/* process markers */
|
|
if (start_code >= 0xd0 && start_code <= 0xd7)
|
|
av_log(avctx, AV_LOG_DEBUG,
|
|
"restart marker: %d\n", start_code & 0x0f);
|
|
/* APP fields */
|
|
else if (start_code >= APP0 && start_code <= APP15)
|
|
mjpeg_decode_app(s);
|
|
/* Comment */
|
|
else if (start_code == COM)
|
|
mjpeg_decode_com(s);
|
|
|
|
switch (start_code) {
|
|
case SOI:
|
|
s->restart_interval = 0;
|
|
s->restart_count = 0;
|
|
/* nothing to do on SOI */
|
|
break;
|
|
case DQT:
|
|
ff_mjpeg_decode_dqt(s);
|
|
break;
|
|
case DHT:
|
|
if (ff_mjpeg_decode_dht(s) < 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
|
|
return -1;
|
|
}
|
|
break;
|
|
case SOF0:
|
|
case SOF1:
|
|
s->lossless = 0;
|
|
s->ls = 0;
|
|
s->progressive = 0;
|
|
if (ff_mjpeg_decode_sof(s) < 0)
|
|
return -1;
|
|
break;
|
|
case SOF2:
|
|
s->lossless = 0;
|
|
s->ls = 0;
|
|
s->progressive = 1;
|
|
if (ff_mjpeg_decode_sof(s) < 0)
|
|
return -1;
|
|
break;
|
|
case SOF3:
|
|
s->lossless = 1;
|
|
s->ls = 0;
|
|
s->progressive = 0;
|
|
if (ff_mjpeg_decode_sof(s) < 0)
|
|
return -1;
|
|
break;
|
|
case SOF48:
|
|
s->lossless = 1;
|
|
s->ls = 1;
|
|
s->progressive = 0;
|
|
if (ff_mjpeg_decode_sof(s) < 0)
|
|
return -1;
|
|
break;
|
|
case LSE:
|
|
if (!CONFIG_JPEGLS_DECODER || ff_jpegls_decode_lse(s) < 0)
|
|
return -1;
|
|
break;
|
|
case EOI:
|
|
s->cur_scan = 0;
|
|
if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
|
|
break;
|
|
eoi_parser:
|
|
if (!s->got_picture) {
|
|
av_log(avctx, AV_LOG_WARNING,
|
|
"Found EOI before any SOF, ignoring\n");
|
|
break;
|
|
}
|
|
if (s->interlaced) {
|
|
s->bottom_field ^= 1;
|
|
/* if not bottom field, do not output image yet */
|
|
if (s->bottom_field == !s->interlace_polarity)
|
|
goto not_the_end;
|
|
}
|
|
*picture = *s->picture_ptr;
|
|
*data_size = sizeof(AVFrame);
|
|
|
|
if (!s->lossless) {
|
|
picture->quality = FFMAX3(s->qscale[0],
|
|
s->qscale[1],
|
|
s->qscale[2]);
|
|
picture->qstride = 0;
|
|
picture->qscale_table = s->qscale_table;
|
|
memset(picture->qscale_table, picture->quality,
|
|
(s->width + 15) / 16);
|
|
if (avctx->debug & FF_DEBUG_QP)
|
|
av_log(avctx, AV_LOG_DEBUG,
|
|
"QP: %d\n", picture->quality);
|
|
picture->quality *= FF_QP2LAMBDA;
|
|
}
|
|
|
|
goto the_end;
|
|
case SOS:
|
|
if (!s->got_picture) {
|
|
av_log(avctx, AV_LOG_WARNING,
|
|
"Can not process SOS before SOF, skipping\n");
|
|
break;
|
|
}
|
|
if (ff_mjpeg_decode_sos(s, NULL, NULL) < 0 &&
|
|
(avctx->err_recognition & AV_EF_EXPLODE))
|
|
return AVERROR_INVALIDDATA;
|
|
/* buggy avid puts EOI every 10-20th frame */
|
|
/* if restart period is over process EOI */
|
|
if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
|
|
goto eoi_parser;
|
|
break;
|
|
case DRI:
|
|
mjpeg_decode_dri(s);
|
|
break;
|
|
case SOF5:
|
|
case SOF6:
|
|
case SOF7:
|
|
case SOF9:
|
|
case SOF10:
|
|
case SOF11:
|
|
case SOF13:
|
|
case SOF14:
|
|
case SOF15:
|
|
case JPG:
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"mjpeg: unsupported coding type (%x)\n", start_code);
|
|
break;
|
|
// default:
|
|
// printf("mjpeg: unsupported marker (%x)\n", start_code);
|
|
// break;
|
|
}
|
|
|
|
not_the_end:
|
|
/* eof process start code */
|
|
buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
|
|
av_log(avctx, AV_LOG_DEBUG,
|
|
"marker parser used %d bytes (%d bits)\n",
|
|
(get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
|
|
}
|
|
}
|
|
if (s->got_picture) {
|
|
av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n");
|
|
goto eoi_parser;
|
|
}
|
|
av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
|
|
return -1;
|
|
the_end:
|
|
av_log(avctx, AV_LOG_DEBUG, "mjpeg decode frame unused %td bytes\n",
|
|
buf_end - buf_ptr);
|
|
// return buf_end - buf_ptr;
|
|
return buf_ptr - buf;
|
|
}
|
|
|
|
av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
|
|
{
|
|
MJpegDecodeContext *s = avctx->priv_data;
|
|
int i, j;
|
|
|
|
if (s->picture_ptr && s->picture_ptr->data[0])
|
|
avctx->release_buffer(avctx, s->picture_ptr);
|
|
|
|
av_free(s->buffer);
|
|
av_free(s->qscale_table);
|
|
av_freep(&s->ljpeg_buffer);
|
|
s->ljpeg_buffer_size = 0;
|
|
|
|
for (i = 0; i < 3; i++) {
|
|
for (j = 0; j < 4; j++)
|
|
free_vlc(&s->vlcs[i][j]);
|
|
}
|
|
for (i = 0; i < MAX_COMPONENTS; i++) {
|
|
av_freep(&s->blocks[i]);
|
|
av_freep(&s->last_nnz[i]);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#define OFFSET(x) offsetof(MJpegDecodeContext, x)
|
|
#define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
|
|
static const AVOption options[] = {
|
|
{ "extern_huff", "Use external huffman table.",
|
|
OFFSET(extern_huff), AV_OPT_TYPE_INT, { 0 }, 0, 1, VD },
|
|
{ NULL },
|
|
};
|
|
|
|
static const AVClass mjpegdec_class = {
|
|
.class_name = "MJPEG decoder",
|
|
.item_name = av_default_item_name,
|
|
.option = options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
|
|
AVCodec ff_mjpeg_decoder = {
|
|
.name = "mjpeg",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = CODEC_ID_MJPEG,
|
|
.priv_data_size = sizeof(MJpegDecodeContext),
|
|
.init = ff_mjpeg_decode_init,
|
|
.close = ff_mjpeg_decode_end,
|
|
.decode = ff_mjpeg_decode_frame,
|
|
.capabilities = CODEC_CAP_DR1,
|
|
.max_lowres = 3,
|
|
.long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
|
|
.priv_class = &mjpegdec_class,
|
|
};
|
|
|
|
AVCodec ff_thp_decoder = {
|
|
.name = "thp",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = CODEC_ID_THP,
|
|
.priv_data_size = sizeof(MJpegDecodeContext),
|
|
.init = ff_mjpeg_decode_init,
|
|
.close = ff_mjpeg_decode_end,
|
|
.decode = ff_mjpeg_decode_frame,
|
|
.capabilities = CODEC_CAP_DR1,
|
|
.max_lowres = 3,
|
|
.long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
|
|
};
|