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ffmpeg/libavcodec/mjpegdec.c

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/*
* MJPEG decoder
* Copyright (c) 2000, 2001 Fabrice Bellard
* Copyright (c) 2003 Alex Beregszaszi
* Copyright (c) 2003-2004 Michael Niedermayer
*
* Support for external huffman table, various fixes (AVID workaround),
* aspecting, new decode_frame mechanism and apple mjpeg-b support
* by Alex Beregszaszi
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* MJPEG decoder.
*/
#include "libavutil/imgutils.h"
#include "libavutil/avassert.h"
#include "libavutil/opt.h"
#include "avcodec.h"
#include "blockdsp.h"
#include "copy_block.h"
#include "idctdsp.h"
#include "internal.h"
#include "jpegtables.h"
#include "mjpeg.h"
#include "mjpegdec.h"
#include "jpeglsdec.h"
#include "put_bits.h"
#include "tiff.h"
#include "exif.h"
#include "bytestream.h"
static int build_vlc(VLC *vlc, const uint8_t *bits_table,
const uint8_t *val_table, int nb_codes,
int use_static, int is_ac)
{
uint8_t huff_size[256] = { 0 };
uint16_t huff_code[256];
uint16_t huff_sym[256];
int i;
av_assert0(nb_codes <= 256);
ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
for (i = 0; i < 256; i++)
huff_sym[i] = i + 16 * is_ac;
if (is_ac)
huff_sym[0] = 16 * 256;
return ff_init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1,
huff_code, 2, 2, huff_sym, 2, 2, use_static);
}
static void build_basic_mjpeg_vlc(MJpegDecodeContext *s)
{
build_vlc(&s->vlcs[0][0], avpriv_mjpeg_bits_dc_luminance,
avpriv_mjpeg_val_dc, 12, 0, 0);
build_vlc(&s->vlcs[0][1], avpriv_mjpeg_bits_dc_chrominance,
avpriv_mjpeg_val_dc, 12, 0, 0);
build_vlc(&s->vlcs[1][0], avpriv_mjpeg_bits_ac_luminance,
avpriv_mjpeg_val_ac_luminance, 251, 0, 1);
build_vlc(&s->vlcs[1][1], avpriv_mjpeg_bits_ac_chrominance,
avpriv_mjpeg_val_ac_chrominance, 251, 0, 1);
build_vlc(&s->vlcs[2][0], avpriv_mjpeg_bits_ac_luminance,
avpriv_mjpeg_val_ac_luminance, 251, 0, 0);
build_vlc(&s->vlcs[2][1], avpriv_mjpeg_bits_ac_chrominance,
avpriv_mjpeg_val_ac_chrominance, 251, 0, 0);
}
static void parse_avid(MJpegDecodeContext *s, uint8_t *buf, int len)
{
s->buggy_avid = 1;
if (len > 14 && buf[12] == 1) /* 1 - NTSC */
s->interlace_polarity = 1;
if (len > 14 && buf[12] == 2) /* 2 - PAL */
s->interlace_polarity = 0;
if (s->avctx->debug & FF_DEBUG_PICT_INFO)
av_log(s->avctx, AV_LOG_INFO, "AVID: len:%d %d\n", len, len > 14 ? buf[12] : -1);
}
static void init_idct(AVCodecContext *avctx)
{
MJpegDecodeContext *s = avctx->priv_data;
ff_idctdsp_init(&s->idsp, avctx);
ff_init_scantable(s->idsp.idct_permutation, &s->scantable,
ff_zigzag_direct);
}
av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
{
MJpegDecodeContext *s = avctx->priv_data;
if (!s->picture_ptr) {
s->picture = av_frame_alloc();
if (!s->picture)
return AVERROR(ENOMEM);
s->picture_ptr = s->picture;
}
s->avctx = avctx;
ff_blockdsp_init(&s->bdsp, avctx);
ff_hpeldsp_init(&s->hdsp, avctx->flags);
init_idct(avctx);
s->buffer_size = 0;
s->buffer = NULL;
s->start_code = -1;
s->first_picture = 1;
s->got_picture = 0;
s->org_height = avctx->coded_height;
avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
avctx->colorspace = AVCOL_SPC_BT470BG;
build_basic_mjpeg_vlc(s);
if (s->extern_huff) {
av_log(avctx, AV_LOG_INFO, "using external huffman table\n");
init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
if (ff_mjpeg_decode_dht(s)) {
av_log(avctx, AV_LOG_ERROR,
"error using external huffman table, switching back to internal\n");
build_basic_mjpeg_vlc(s);
}
}
if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
s->interlace_polarity = 1; /* bottom field first */
av_log(avctx, AV_LOG_DEBUG, "bottom field first\n");
} else if (avctx->field_order == AV_FIELD_UNKNOWN) {
if (avctx->codec_tag == AV_RL32("MJPG"))
s->interlace_polarity = 1;
}
if ( avctx->extradata_size > 8
&& AV_RL32(avctx->extradata) == 0x2C
&& AV_RL32(avctx->extradata+4) == 0x18) {
parse_avid(s, avctx->extradata, avctx->extradata_size);
}
if (avctx->codec->id == AV_CODEC_ID_AMV)
s->flipped = 1;
return 0;
}
/* quantize tables */
int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
{
int len, index, i, j;
len = get_bits(&s->gb, 16) - 2;
if (8*len > get_bits_left(&s->gb)) {
av_log(s->avctx, AV_LOG_ERROR, "dqt: len %d is too large\n", len);
return AVERROR_INVALIDDATA;
}
while (len >= 65) {
int pr = get_bits(&s->gb, 4);
if (pr > 1) {
av_log(s->avctx, AV_LOG_ERROR, "dqt: invalid precision\n");
return AVERROR_INVALIDDATA;
}
index = get_bits(&s->gb, 4);
if (index >= 4)
return -1;
av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
/* read quant table */
for (i = 0; i < 64; i++) {
j = s->scantable.permutated[i];
s->quant_matrixes[index][j] = get_bits(&s->gb, pr ? 16 : 8);
}
// XXX FIXME finetune, and perhaps add dc too
s->qscale[index] = FFMAX(s->quant_matrixes[index][s->scantable.permutated[1]],
s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
index, s->qscale[index]);
len -= 1 + 64 * (1+pr);
}
return 0;
}
/* decode huffman tables and build VLC decoders */
int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
{
int len, index, i, class, n, v, code_max;
uint8_t bits_table[17];
uint8_t val_table[256];
int ret = 0;
len = get_bits(&s->gb, 16) - 2;
if (8*len > get_bits_left(&s->gb)) {
av_log(s->avctx, AV_LOG_ERROR, "dht: len %d is too large\n", len);
return AVERROR_INVALIDDATA;
}
while (len > 0) {
if (len < 17)
return AVERROR_INVALIDDATA;
class = get_bits(&s->gb, 4);
if (class >= 2)
return AVERROR_INVALIDDATA;
index = get_bits(&s->gb, 4);
if (index >= 4)
return AVERROR_INVALIDDATA;
n = 0;
for (i = 1; i <= 16; i++) {
bits_table[i] = get_bits(&s->gb, 8);
n += bits_table[i];
}
len -= 17;
if (len < n || n > 256)
return AVERROR_INVALIDDATA;
code_max = 0;
for (i = 0; i < n; i++) {
v = get_bits(&s->gb, 8);
if (v > code_max)
code_max = v;
val_table[i] = v;
}
len -= n;
/* build VLC and flush previous vlc if present */
ff_free_vlc(&s->vlcs[class][index]);
av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
class, index, code_max + 1);
if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table,
code_max + 1, 0, class > 0)) < 0)
return ret;
if (class > 0) {
ff_free_vlc(&s->vlcs[2][index]);
if ((ret = build_vlc(&s->vlcs[2][index], bits_table, val_table,
code_max + 1, 0, 0)) < 0)
return ret;
}
}
return 0;
}
int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
{
int len, nb_components, i, width, height, bits, ret;
unsigned pix_fmt_id;
int h_count[MAX_COMPONENTS] = { 0 };
int v_count[MAX_COMPONENTS] = { 0 };
s->cur_scan = 0;
memset(s->upscale_h, 0, sizeof(s->upscale_h));
memset(s->upscale_v, 0, sizeof(s->upscale_v));
/* XXX: verify len field validity */
len = get_bits(&s->gb, 16);
bits = get_bits(&s->gb, 8);
if (bits > 16 || bits < 1) {
av_log(s->avctx, AV_LOG_ERROR, "bits %d is invalid\n", bits);
return AVERROR_INVALIDDATA;
}
if (s->avctx->bits_per_raw_sample != bits) {
av_log(s->avctx, AV_LOG_INFO, "Changing bps to %d\n", bits);
s->avctx->bits_per_raw_sample = bits;
init_idct(s->avctx);
}
if (s->pegasus_rct)
bits = 9;
if (bits == 9 && !s->pegasus_rct)
s->rct = 1; // FIXME ugly
if(s->lossless && s->avctx->lowres){
av_log(s->avctx, AV_LOG_ERROR, "lowres is not possible with lossless jpeg\n");
return -1;
}
height = get_bits(&s->gb, 16);
width = get_bits(&s->gb, 16);
// HACK for odd_height.mov
if (s->interlaced && s->width == width && s->height == height + 1)
height= s->height;
av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
if (av_image_check_size(width, height, 0, s->avctx))
return AVERROR_INVALIDDATA;
nb_components = get_bits(&s->gb, 8);
if (nb_components <= 0 ||
nb_components > MAX_COMPONENTS)
return -1;
if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
if (nb_components != s->nb_components) {
av_log(s->avctx, AV_LOG_ERROR,
"nb_components changing in interlaced picture\n");
return AVERROR_INVALIDDATA;
}
}
if (s->ls && !(bits <= 8 || nb_components == 1)) {
avpriv_report_missing_feature(s->avctx,
"JPEG-LS that is not <= 8 "
"bits/component or 16-bit gray");
return AVERROR_PATCHWELCOME;
}
s->nb_components = nb_components;
s->h_max = 1;
s->v_max = 1;
for (i = 0; i < nb_components; i++) {
/* component id */
s->component_id[i] = get_bits(&s->gb, 8) - 1;
h_count[i] = get_bits(&s->gb, 4);
v_count[i] = get_bits(&s->gb, 4);
/* compute hmax and vmax (only used in interleaved case) */
if (h_count[i] > s->h_max)
s->h_max = h_count[i];
if (v_count[i] > s->v_max)
s->v_max = v_count[i];
s->quant_index[i] = get_bits(&s->gb, 8);
if (s->quant_index[i] >= 4) {
av_log(s->avctx, AV_LOG_ERROR, "quant_index is invalid\n");
return AVERROR_INVALIDDATA;
}
if (!h_count[i] || !v_count[i]) {
av_log(s->avctx, AV_LOG_ERROR,
"Invalid sampling factor in component %d %d:%d\n",
i, h_count[i], v_count[i]);
return AVERROR_INVALIDDATA;
}
av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
i, h_count[i], v_count[i],
s->component_id[i], s->quant_index[i]);
}
if ( nb_components == 4
&& s->component_id[0] == 'C' - 1
&& s->component_id[1] == 'M' - 1
&& s->component_id[2] == 'Y' - 1
&& s->component_id[3] == 'K' - 1)
s->adobe_transform = 0;
if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS");
return AVERROR_PATCHWELCOME;
}
/* if different size, realloc/alloc picture */
if (width != s->width || height != s->height || bits != s->bits ||
memcmp(s->h_count, h_count, sizeof(h_count)) ||
memcmp(s->v_count, v_count, sizeof(v_count))) {
s->width = width;
s->height = height;
s->bits = bits;
memcpy(s->h_count, h_count, sizeof(h_count));
memcpy(s->v_count, v_count, sizeof(v_count));
s->interlaced = 0;
s->got_picture = 0;
/* test interlaced mode */
if (s->first_picture &&
(s->multiscope != 2 || s->avctx->time_base.den >= 25 * s->avctx->time_base.num) &&
s->org_height != 0 &&
s->height < ((s->org_height * 3) / 4)) {
s->interlaced = 1;
s->bottom_field = s->interlace_polarity;
s->picture_ptr->interlaced_frame = 1;
s->picture_ptr->top_field_first = !s->interlace_polarity;
height *= 2;
}
ret = ff_set_dimensions(s->avctx, width, height);
if (ret < 0)
return ret;
s->first_picture = 0;
}
if (s->got_picture && s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
if (s->progressive) {
avpriv_request_sample(s->avctx, "progressively coded interlaced picture");
return AVERROR_INVALIDDATA;
}
} else{
if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && (nb_components==3 || nb_components==4))
s->rgb = 1;
else if (!s->lossless)
s->rgb = 0;
/* XXX: not complete test ! */
pix_fmt_id = ((unsigned)s->h_count[0] << 28) | (s->v_count[0] << 24) |
(s->h_count[1] << 20) | (s->v_count[1] << 16) |
(s->h_count[2] << 12) | (s->v_count[2] << 8) |
(s->h_count[3] << 4) | s->v_count[3];
av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
/* NOTE we do not allocate pictures large enough for the possible
* padding of h/v_count being 4 */
if (!(pix_fmt_id & 0xD0D0D0D0))
pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
if (!(pix_fmt_id & 0x0D0D0D0D))
pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
for (i = 0; i < 8; i++) {
int j = 6 + (i&1) - (i&6);
int is = (pix_fmt_id >> (4*i)) & 0xF;
int js = (pix_fmt_id >> (4*j)) & 0xF;
if (is == 1 && js != 2 && (i < 2 || i > 5))
js = (pix_fmt_id >> ( 8 + 4*(i&1))) & 0xF;
if (is == 1 && js != 2 && (i < 2 || i > 5))
js = (pix_fmt_id >> (16 + 4*(i&1))) & 0xF;
if (is == 1 && js == 2) {
if (i & 1) s->upscale_h[j/2] = 1;
else s->upscale_v[j/2] = 1;
}
}
switch (pix_fmt_id) {
case 0x11111100:
if (s->rgb)
s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_BGR24 : AV_PIX_FMT_BGR48;
else {
if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_GBRP : AV_PIX_FMT_GBRP16;
} else {
if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
else s->avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
}
}
av_assert0(s->nb_components == 3);
break;
case 0x11111111:
if (s->rgb)
s->avctx->pix_fmt = s->bits <= 9 ? AV_PIX_FMT_ABGR : AV_PIX_FMT_RGBA64;
else {
if (s->adobe_transform == 0 && s->bits <= 8) {
s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
} else {
s->avctx->pix_fmt = s->bits <= 8 ? AV_PIX_FMT_YUVA444P : AV_PIX_FMT_YUVA444P16;
s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
}
}
av_assert0(s->nb_components == 4);
break;
case 0x22111122:
case 0x22111111:
if (s->adobe_transform == 0 && s->bits <= 8) {
s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
s->upscale_v[1] = s->upscale_v[2] = 1;
s->upscale_h[1] = s->upscale_h[2] = 1;
} else if (s->adobe_transform == 2 && s->bits <= 8) {
s->avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
s->upscale_v[1] = s->upscale_v[2] = 1;
s->upscale_h[1] = s->upscale_h[2] = 1;
s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
} else {
if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
else s->avctx->pix_fmt = AV_PIX_FMT_YUVA420P16;
s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
}
av_assert0(s->nb_components == 4);
break;
case 0x12121100:
case 0x22122100:
case 0x21211100:
case 0x22211200:
if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
else
goto unk_pixfmt;
s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
break;
case 0x22221100:
case 0x22112200:
case 0x11222200:
if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
else
goto unk_pixfmt;
s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
break;
case 0x11000000:
case 0x13000000:
case 0x14000000:
case 0x31000000:
case 0x33000000:
case 0x34000000:
case 0x41000000:
case 0x43000000:
case 0x44000000:
if(s->bits <= 8)
s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
else
s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
break;
case 0x12111100:
case 0x14121200:
case 0x14111100:
case 0x22211100:
case 0x22112100:
if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
else
goto unk_pixfmt;
s->upscale_v[0] = s->upscale_v[1] = 1;
} else {
if (pix_fmt_id == 0x14111100)
s->upscale_v[1] = s->upscale_v[2] = 1;
if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
else
goto unk_pixfmt;
s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
}
break;
case 0x21111100:
if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
if (s->bits <= 8) s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
else
goto unk_pixfmt;
s->upscale_h[0] = s->upscale_h[1] = 1;
} else {
if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
else s->avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
}
break;
case 0x31111100:
if (s->bits > 8)
goto unk_pixfmt;
s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
s->upscale_h[1] = s->upscale_h[2] = 2;
break;
case 0x22121100:
case 0x22111200:
if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
else
goto unk_pixfmt;
s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
break;
case 0x22111100:
case 0x42111100:
case 0x24111100:
if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
else s->avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
if (pix_fmt_id == 0x42111100) {
if (s->bits > 8)
goto unk_pixfmt;
s->upscale_h[1] = s->upscale_h[2] = 1;
} else if (pix_fmt_id == 0x24111100) {
if (s->bits > 8)
goto unk_pixfmt;
s->upscale_v[1] = s->upscale_v[2] = 1;
}
break;
case 0x41111100:
if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV411P : AV_PIX_FMT_YUVJ411P;
else
goto unk_pixfmt;
s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
break;
default:
unk_pixfmt:
av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x bits:%d\n", pix_fmt_id, s->bits);
memset(s->upscale_h, 0, sizeof(s->upscale_h));
memset(s->upscale_v, 0, sizeof(s->upscale_v));
return AVERROR_PATCHWELCOME;
}
if ((AV_RB32(s->upscale_h) || AV_RB32(s->upscale_v)) && s->avctx->lowres) {
av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n");
return AVERROR_PATCHWELCOME;
}
if (s->ls) {
memset(s->upscale_h, 0, sizeof(s->upscale_h));
memset(s->upscale_v, 0, sizeof(s->upscale_v));
if (s->nb_components == 3) {
s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
} else if (s->nb_components != 1) {
av_log(s->avctx, AV_LOG_ERROR, "Unsupported number of components %d\n", s->nb_components);
return AVERROR_PATCHWELCOME;
} else if (s->palette_index && s->bits <= 8)
s->avctx->pix_fmt = AV_PIX_FMT_PAL8;
else if (s->bits <= 8)
s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
else
s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
}
s->pix_desc = av_pix_fmt_desc_get(s->avctx->pix_fmt);
if (!s->pix_desc) {
av_log(s->avctx, AV_LOG_ERROR, "Could not get a pixel format descriptor.\n");
return AVERROR_BUG;
}
av_frame_unref(s->picture_ptr);
if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0)
return -1;
s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
s->picture_ptr->key_frame = 1;
s->got_picture = 1;
for (i = 0; i < 4; i++)
s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
ff_dlog(s->avctx, "%d %d %d %d %d %d\n",
s->width, s->height, s->linesize[0], s->linesize[1],
s->interlaced, s->avctx->height);
if (len != (8 + (3 * nb_components)))
av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
}
if ((s->rgb && !s->lossless && !s->ls) ||
(!s->rgb && s->ls && s->nb_components > 1)) {
av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n");
return AVERROR_PATCHWELCOME;
}
/* totally blank picture as progressive JPEG will only add details to it */
if (s->progressive) {
int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
for (i = 0; i < s->nb_components; i++) {
int size = bw * bh * s->h_count[i] * s->v_count[i];
av_freep(&s->blocks[i]);
av_freep(&s->last_nnz[i]);
s->blocks[i] = av_mallocz_array(size, sizeof(**s->blocks));
s->last_nnz[i] = av_mallocz_array(size, sizeof(**s->last_nnz));
if (!s->blocks[i] || !s->last_nnz[i])
return AVERROR(ENOMEM);
s->block_stride[i] = bw * s->h_count[i];
}
memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
}
return 0;
}
static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
{
int code;
code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
if (code < 0 || code > 16) {
av_log(s->avctx, AV_LOG_WARNING,
"mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
0, dc_index, &s->vlcs[0][dc_index]);
return 0xfffff;
}
if (code)
return get_xbits(&s->gb, code);
else
return 0;
}
/* decode block and dequantize */
static int decode_block(MJpegDecodeContext *s, int16_t *block, int component,
int dc_index, int ac_index, int16_t *quant_matrix)
{
int code, i, j, level, val;
/* DC coef */
val = mjpeg_decode_dc(s, dc_index);
if (val == 0xfffff) {
av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
return AVERROR_INVALIDDATA;
}
val = val * quant_matrix[0] + s->last_dc[component];
val = FFMIN(val, 32767);
s->last_dc[component] = val;
block[0] = val;
/* AC coefs */
i = 0;
{OPEN_READER(re, &s->gb);
do {
UPDATE_CACHE(re, &s->gb);
GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2);
i += ((unsigned)code) >> 4;
code &= 0xf;
if (code) {
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 > 63) {
av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
return AVERROR_INVALIDDATA;
}
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, int16_t *block,
int component, int dc_index,
int16_t *quant_matrix, int Al)
{
int val;
s->bdsp.clear_block(block);
val = mjpeg_decode_dc(s, dc_index);
if (val == 0xfffff) {
av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
return AVERROR_INVALIDDATA;
}
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, int16_t *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 AVERROR_INVALIDDATA;
}
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 AVERROR_INVALIDDATA;
}
} 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, int16_t *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] << Al) ^ val) - val;
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 handle_rstn(MJpegDecodeContext *s, int nb_components)
{
int i;
int reset = 0;
if (s->restart_interval) {
s->restart_count--;
if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
align_get_bits(&s->gb);
for (i = 0; i < nb_components; i++) /* reset dc */
s->last_dc[i] = (4 << s->bits);
}
i = 8 + ((-get_bits_count(&s->gb)) & 7);
/* skip RSTn */
if (s->restart_count == 0) {
if( show_bits(&s->gb, i) == (1 << i) - 1
|| show_bits(&s->gb, i) == 0xFF) {
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_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
for (i = 0; i < nb_components; i++) /* reset dc */
s->last_dc[i] = (4 << s->bits);
reset = 1;
} else
skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
}
}
}
return reset;
}
static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
{
int i, mb_x, mb_y;
uint16_t (*buffer)[4];
int left[4], top[4], topleft[4];
const int linesize = s->linesize[0];
const int mask = ((1 << s->bits) - 1) << point_transform;
int resync_mb_y = 0;
int resync_mb_x = 0;
if (s->nb_components != 3 && s->nb_components != 4)
return AVERROR_INVALIDDATA;
if (s->v_max != 1 || s->h_max != 1 || !s->lossless)
return AVERROR_INVALIDDATA;
s->restart_count = s->restart_interval;
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 < 4; i++)
buffer[0][i] = 1 << (s->bits - 1);
for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
if (s->interlaced && s->bottom_field)
ptr += linesize >> 1;
for (i = 0; i < 4; i++)
top[i] = left[i] = topleft[i] = buffer[0][i];
for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
int modified_predictor = predictor;
if (s->restart_interval && !s->restart_count){
s->restart_count = s->restart_interval;
resync_mb_x = mb_x;
resync_mb_y = mb_y;
for(i=0; i<4; i++)
top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
}
if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
modified_predictor = 1;
for (i=0;i<nb_components;i++) {
int pred, dc;
topleft[i] = top[i];
top[i] = buffer[mb_x][i];
PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
dc = mjpeg_decode_dc(s, s->dc_index[i]);
if(dc == 0xFFFFF)
return -1;
left[i] = buffer[mb_x][i] =
mask & (pred + (dc * (1 << point_transform)));
}
if (s->restart_interval && !--s->restart_count) {
align_get_bits(&s->gb);
skip_bits(&s->gb, 16); /* skip RSTn */
}
}
if (s->rct && s->nb_components == 4) {
for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
ptr[4*mb_x + 2] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
ptr[4*mb_x + 1] = buffer[mb_x][1] + ptr[4*mb_x + 2];
ptr[4*mb_x + 3] = buffer[mb_x][2] + ptr[4*mb_x + 2];
ptr[4*mb_x + 0] = buffer[mb_x][3];
}
} else if (s->nb_components == 4) {
for(i=0; i<nb_components; i++) {
int c= s->comp_index[i];
if (s->bits <= 8) {
for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
ptr[4*mb_x+3-c] = buffer[mb_x][i];
}
} else if(s->bits == 9) {
return AVERROR_PATCHWELCOME;
} else {
for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
((uint16_t*)ptr)[4*mb_x+c] = buffer[mb_x][i];
}
}
}
} else if (s->rct) {
for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
}
} else if (s->pegasus_rct) {
for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
}
} else {
for(i=0; i<nb_components; i++) {
int c= s->comp_index[i];
if (s->bits <= 8) {
for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
ptr[3*mb_x+2-c] = buffer[mb_x][i];
}
} else if(s->bits == 9) {
return AVERROR_PATCHWELCOME;
} else {
for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
((uint16_t*)ptr)[3*mb_x+2-c] = buffer[mb_x][i];
}
}
}
}
}
return 0;
}
static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
int point_transform, int nb_components)
{
int i, mb_x, mb_y, mask;
int bits= (s->bits+7)&~7;
int resync_mb_y = 0;
int resync_mb_x = 0;
point_transform += bits - s->bits;
mask = ((1 << s->bits) - 1) << point_transform;
av_assert0(nb_components>=1 && nb_components<=4);
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;
resync_mb_x = mb_x;
resync_mb_y = mb_y;
}
if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
for (i = 0; i < nb_components; i++) {
uint8_t *ptr;
uint16_t *ptr16;
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];
if(bits>8) linesize /= 2;
for(j=0; j<n; j++) {
int pred, dc;
dc = mjpeg_decode_dc(s, s->dc_index[i]);
if(dc == 0xFFFFF)
return -1;
if ( h * mb_x + x >= s->width
|| v * mb_y + y >= s->height) {
// Nothing to do
} else if (bits<=8) {
ptr = s->picture_ptr->data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
if(y==0 && toprow){
if(x==0 && leftcol){
pred= 1 << (bits - 1);
}else{
pred= ptr[-1];
}
}else{
if(x==0 && leftcol){
pred= ptr[-linesize];
}else{
PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
}
}
if (s->interlaced && s->bottom_field)
ptr += linesize >> 1;
pred &= mask;
*ptr= pred + (dc << point_transform);
}else{
ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
if(y==0 && toprow){
if(x==0 && leftcol){
pred= 1 << (bits - 1);
}else{
pred= ptr16[-1];
}
}else{
if(x==0 && leftcol){
pred= ptr16[-linesize];
}else{
PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
}
}
if (s->interlaced && s->bottom_field)
ptr16 += linesize >> 1;
pred &= mask;
*ptr16= pred + (dc << point_transform);
}
if (++x == h) {
x = 0;
y++;
}
}
}
} else {
for (i = 0; i < nb_components; i++) {
uint8_t *ptr;
uint16_t *ptr16;
int n, h, v, x, y, c, j, linesize, dc;
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];
if(bits>8) linesize /= 2;
for (j = 0; j < n; j++) {
int pred;
dc = mjpeg_decode_dc(s, s->dc_index[i]);
if(dc == 0xFFFFF)
return -1;
if ( h * mb_x + x >= s->width
|| v * mb_y + y >= s->height) {
// Nothing to do
} else if (bits<=8) {
ptr = s->picture_ptr->data[c] +
(linesize * (v * mb_y + y)) +
(h * mb_x + x); //FIXME optimize this crap
PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
pred &= mask;
*ptr = pred + (dc << point_transform);
}else{
ptr16 = (uint16_t*)(s->picture_ptr->data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
pred &= mask;
*ptr16= pred + (dc << 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(MJpegDecodeContext *s,
uint8_t *dst, const uint8_t *src,
int linesize, int lowres)
{
switch (lowres) {
case 0: s->hdsp.put_pixels_tab[1][0](dst, src, 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 void shift_output(MJpegDecodeContext *s, uint8_t *ptr, int linesize)
{
int block_x, block_y;
int size = 8 >> s->avctx->lowres;
if (s->bits > 8) {
for (block_y=0; block_y<size; block_y++)
for (block_x=0; block_x<size; block_x++)
*(uint16_t*)(ptr + 2*block_x + block_y*linesize) <<= 16 - s->bits;
} else {
for (block_y=0; block_y<size; block_y++)
for (block_x=0; block_x<size; block_x++)
*(ptr + block_x + block_y*linesize) <<= 8 - s->bits;
}
}
static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
int Al, const uint8_t *mb_bitmask,
int mb_bitmask_size,
const AVFrame *reference)
{
int i, mb_x, mb_y, chroma_h_shift, chroma_v_shift, chroma_width, chroma_height;
uint8_t *data[MAX_COMPONENTS];
const uint8_t *reference_data[MAX_COMPONENTS];
int linesize[MAX_COMPONENTS];
GetBitContext mb_bitmask_gb = {0}; // initialize to silence gcc warning
int bytes_per_pixel = 1 + (s->bits > 8);
if (mb_bitmask) {
if (mb_bitmask_size != (s->mb_width * s->mb_height + 7)>>3) {
av_log(s->avctx, AV_LOG_ERROR, "mb_bitmask_size mismatches\n");
return AVERROR_INVALIDDATA;
}
init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
}
s->restart_count = 0;
av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt, &chroma_h_shift,
&chroma_v_shift);
chroma_width = AV_CEIL_RSHIFT(s->width, chroma_h_shift);
chroma_height = AV_CEIL_RSHIFT(s->height, chroma_v_shift);
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;
}
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_left(&s->gb) < 0) {
av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
-get_bits_left(&s->gb));
return AVERROR_INVALIDDATA;
}
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 * bytes_per_pixel) >> s->avctx->lowres);
if (s->interlaced && s->bottom_field)
block_offset += linesize[c] >> 1;
if ( 8*(h * mb_x + x) < ((c == 1) || (c == 2) ? chroma_width : s->width)
&& 8*(v * mb_y + y) < ((c == 1) || (c == 2) ? chroma_height : s->height)) {
ptr = data[c] + block_offset;
} else
ptr = NULL;
if (!s->progressive) {
if (copy_mb) {
if (ptr)
mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
linesize[c], s->avctx->lowres);
} else {
s->bdsp.clear_block(s->block);
if (decode_block(s, s->block, i,
s->dc_index[i], s->ac_index[i],
s->quant_matrixes[s->quant_sindex[i]]) < 0) {
av_log(s->avctx, AV_LOG_ERROR,
"error y=%d x=%d\n", mb_y, mb_x);
return AVERROR_INVALIDDATA;
}
if (ptr) {
s->idsp.idct_put(ptr, linesize[c], s->block);
if (s->bits & 7)
shift_output(s, ptr, linesize[c]);
}
}
} else {
int block_idx = s->block_stride[c] * (v * mb_y + y) +
(h * mb_x + x);
int16_t *block = s->blocks[c][block_idx];
if (Ah)
block[0] += get_bits1(&s->gb) *
s->quant_matrixes[s->quant_sindex[i]][0] << Al;
else if (decode_dc_progressive(s, block, i, s->dc_index[i],
s->quant_matrixes[s->quant_sindex[i]],
Al) < 0) {
av_log(s->avctx, AV_LOG_ERROR,
"error y=%d x=%d\n", mb_y, mb_x);
return AVERROR_INVALIDDATA;
}
}
ff_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x);
ff_dlog(s->avctx, "%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++;
}
}
}
handle_rstn(s, nb_components);
}
}
return 0;
}
static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
int se, int Ah, int Al)
{
int mb_x, mb_y;
int EOBRUN = 0;
int c = s->comp_index[0];
uint8_t *data = s->picture_ptr->data[c];
int linesize = s->linesize[c];
int last_scan = 0;
int16_t *quant_matrix = s->quant_matrixes[s->quant_sindex[0]];
int bytes_per_pixel = 1 + (s->bits > 8);
av_assert0(ss>=0 && Ah>=0 && Al>=0);
if (se < ss || se > 63) {
av_log(s->avctx, AV_LOG_ERROR, "SS/SE %d/%d is invalid\n", ss, se);
return AVERROR_INVALIDDATA;
}
// s->coefs_finished is a bitmask for coefficients coded
// ss and se are parameters telling start and end coefficients
s->coefs_finished[c] |= (2ULL << se) - (1ULL << ss);
last_scan = !Al && !~s->coefs_finished[c];
if (s->interlaced && s->bottom_field)
data += linesize >> 1;
s->restart_count = 0;
for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres);
int block_idx = mb_y * s->block_stride[c];
int16_t (*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++) {
int ret;
if (s->restart_interval && !s->restart_count)
s->restart_count = s->restart_interval;
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 AVERROR_INVALIDDATA;
}
if (last_scan) {
s->idsp.idct_put(ptr, linesize, *block);
if (s->bits & 7)
shift_output(s, ptr, linesize);
ptr += bytes_per_pixel*8 >> s->avctx->lowres;
}
if (handle_rstn(s, 0))
EOBRUN = 0;
}
}
return 0;
}
int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
int mb_bitmask_size, const AVFrame *reference)
{
int len, nb_components, i, h, v, predictor, point_transform;
int index, id, ret;
const int block_size = s->lossless ? 1 : 8;
int ilv, prev_shift;
if (!s->got_picture) {
av_log(s->avctx, AV_LOG_WARNING,
"Can not process SOS before SOF, skipping\n");
return -1;
}
av_assert0(s->picture_ptr->data[0]);
/* 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 AVERROR_PATCHWELCOME;
}
if (len != 6 + 2 * nb_components) {
av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
return AVERROR_INVALIDDATA;
}
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 AVERROR_INVALIDDATA;
}
/* 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->quant_sindex[i] = s->quant_index[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];
if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
index = (i+2)%3;
if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
index = (index+2)%3;
s->comp_index[i] = 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->progressive ? s->vlcs[2][s->ac_index[0]].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 */
if(s->avctx->codec_tag != AV_RL32("CJPG")){
prev_shift = get_bits(&s->gb, 4); /* Ah */
point_transform = get_bits(&s->gb, 4); /* Al */
}else
prev_shift = point_transform = 0;
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 skip:%d %s comp:%d\n",
s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
/* 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);
next_field:
for (i = 0; i < nb_components; i++)
s->last_dc[i] = (4 << s->bits);
if (s->lossless) {
av_assert0(s->picture_ptr == s->picture);
if (CONFIG_JPEGLS_DECODER && s->ls) {
// for () {
// reset_ls_coding_parameters(s, 0);
if ((ret = ff_jpegls_decode_picture(s, predictor,
point_transform, ilv)) < 0)
return ret;
} else {
if (s->rgb) {
if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
return ret;
} else {
if ((ret = ljpeg_decode_yuv_scan(s, predictor,
point_transform,
nb_components)) < 0)
return ret;
}
}
} else {
if (s->progressive && predictor) {
av_assert0(s->picture_ptr == s->picture);
if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
ilv, prev_shift,
point_transform)) < 0)
return ret;
} else {
if ((ret = mjpeg_decode_scan(s, nb_components,
prev_shift, point_transform,
mb_bitmask, mb_bitmask_size, reference)) < 0)
return ret;
}
}
if (s->interlaced &&
get_bits_left(&s->gb) > 32 &&
show_bits(&s->gb, 8) == 0xFF) {
GetBitContext bak = s->gb;
align_get_bits(&bak);
if (show_bits(&bak, 16) == 0xFFD1) {
av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
s->gb = bak;
skip_bits(&s->gb, 16);
s->bottom_field ^= 1;
goto next_field;
}
}
emms_c();
return 0;
out_of_range:
av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n");
return AVERROR_INVALIDDATA;
}
static int mjpeg_decode_dri(MJpegDecodeContext *s)
{
if (get_bits(&s->gb, 16) != 4)
return AVERROR_INVALIDDATA;
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 < 6)
return AVERROR_INVALIDDATA;
if (8 * len > get_bits_left(&s->gb))
return AVERROR_INVALIDDATA;
id = get_bits_long(&s->gb, 32);
len -= 6;
if (s->avctx->debug & FF_DEBUG_STARTCODE) {
char id_str[32];
av_get_codec_tag_string(id_str, sizeof(id_str), av_bswap32(id));
av_log(s->avctx, AV_LOG_DEBUG, "APPx (%s / %8X) len=%d\n", id_str, id, len);
}
/* 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_RB32("AVI1")) {
/* structure:
4bytes AVI1
1bytes polarity
1bytes always zero
4bytes field_size
4bytes field_size_less_padding
*/
s->buggy_avid = 1;
i = get_bits(&s->gb, 8); len--;
av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
#if 0
skip_bits(&s->gb, 8);
skip_bits(&s->gb, 32);
skip_bits(&s->gb, 32);
len -= 10;
#endif
goto out;
}
// len -= 2;
if (id == AV_RB32("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->sample_aspect_ratio.num <= 0
|| s->avctx->sample_aspect_ratio.den <= 0) {
s->avctx->sample_aspect_ratio.num = 0;
s->avctx->sample_aspect_ratio.den = 1;
}
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_RB32("Adob")
&& len >= 7
&& show_bits(&s->gb, 8) == 'e'
&& show_bits_long(&s->gb, 32) != AV_RB32("e_CM")) {
skip_bits(&s->gb, 8); /* 'e' */
skip_bits(&s->gb, 16); /* version */
skip_bits(&s->gb, 16); /* flags0 */
skip_bits(&s->gb, 16); /* flags1 */
s->adobe_transform = get_bits(&s->gb, 8);
if (s->avctx->debug & FF_DEBUG_PICT_INFO)
av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found, transform=%d\n", s->adobe_transform);
len -= 7;
goto out;
}
if (id == AV_RB32("LJIF")) {
int rgb = s->rgb;
int pegasus_rct = s->pegasus_rct;
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); /* unknown always 0? */
skip_bits(&s->gb, 16); /* unknown always 0? */
skip_bits(&s->gb, 16); /* unknown always 0? */
switch (i=get_bits(&s->gb, 8)) {
case 1:
rgb = 1;
pegasus_rct = 0;
break;
case 2:
rgb = 1;
pegasus_rct = 1;
break;
default:
av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace %d\n", i);
}
len -= 9;
if (s->got_picture)
if (rgb != s->rgb || pegasus_rct != s->pegasus_rct) {
av_log(s->avctx, AV_LOG_WARNING, "Mismatching LJIF tag\n");
goto out;
}
s->rgb = rgb;
s->pegasus_rct = pegasus_rct;
goto out;
}
if (id == AV_RL32("colr") && len > 0) {
s->colr = get_bits(&s->gb, 8);
if (s->avctx->debug & FF_DEBUG_PICT_INFO)
av_log(s->avctx, AV_LOG_INFO, "COLR %d\n", s->colr);
len --;
goto out;
}
if (id == AV_RL32("xfrm") && len > 0) {
s->xfrm = get_bits(&s->gb, 8);
if (s->avctx->debug & FF_DEBUG_PICT_INFO)
av_log(s->avctx, AV_LOG_INFO, "XFRM %d\n", s->xfrm);
len --;
goto out;
}
/* JPS extension by VRex */
if (s->start_code == APP3 && id == AV_RB32("_JPS") && len >= 10) {
int flags, layout, type;
if (s->avctx->debug & FF_DEBUG_PICT_INFO)
av_log(s->avctx, AV_LOG_INFO, "_JPSJPS_\n");
skip_bits(&s->gb, 32); len -= 4; /* JPS_ */
skip_bits(&s->gb, 16); len -= 2; /* block length */
skip_bits(&s->gb, 8); /* reserved */
flags = get_bits(&s->gb, 8);
layout = get_bits(&s->gb, 8);
type = get_bits(&s->gb, 8);
len -= 4;
s->stereo3d = av_stereo3d_alloc();
if (!s->stereo3d) {
goto out;
}
if (type == 0) {
s->stereo3d->type = AV_STEREO3D_2D;
} else if (type == 1) {
switch (layout) {
case 0x01:
s->stereo3d->type = AV_STEREO3D_LINES;
break;
case 0x02:
s->stereo3d->type = AV_STEREO3D_SIDEBYSIDE;
break;
case 0x03:
s->stereo3d->type = AV_STEREO3D_TOPBOTTOM;
break;
}
if (!(flags & 0x04)) {
s->stereo3d->flags = AV_STEREO3D_FLAG_INVERT;
}
}
goto out;
}
/* EXIF metadata */
if (s->start_code == APP1 && id == AV_RB32("Exif") && len >= 2) {
GetByteContext gbytes;
int ret, le, ifd_offset, bytes_read;
const uint8_t *aligned;
skip_bits(&s->gb, 16); // skip padding
len -= 2;
// init byte wise reading
aligned = align_get_bits(&s->gb);
bytestream2_init(&gbytes, aligned, len);
// read TIFF header
ret = ff_tdecode_header(&gbytes, &le, &ifd_offset);
if (ret) {
av_log(s->avctx, AV_LOG_ERROR, "mjpeg: invalid TIFF header in EXIF data\n");
} else {
bytestream2_seek(&gbytes, ifd_offset, SEEK_SET);
// read 0th IFD and store the metadata
// (return values > 0 indicate the presence of subimage metadata)
ret = avpriv_exif_decode_ifd(s->avctx, &gbytes, le, 0, &s->exif_metadata);
if (ret < 0) {
av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error decoding EXIF data\n");
}
}
bytes_read = bytestream2_tell(&gbytes);
skip_bits(&s->gb, bytes_read << 3);
len -= bytes_read;
goto out;
}
/* Apple MJPEG-A */
if ((s->start_code == APP1) && (len > (0x28 - 8))) {
id = get_bits_long(&s->gb, 32);
len -= 4;
/* Apple MJPEG-A */
if (id == AV_RB32("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_left(&s->gb)) {
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, "comment: '%s'\n", cbuf);
/* buggy avid, it puts EOI only at every 10th frame */
if (!strncmp(cbuf, "AVID", 4)) {
parse_avid(s, cbuf, len);
} else if (!strcmp(cbuf, "CS=ITU601"))
s->cs_itu601 = 1;
else if ((!strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32) && s->avctx->codec_tag) ||
(!strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
s->flipped = 1;
else if (!strcmp(cbuf, "MULTISCOPE II"))
s->multiscope = 2;
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;
int skipped = 0;
buf_ptr = *pbuf_ptr;
while (buf_end - buf_ptr > 1) {
v = *buf_ptr++;
v2 = *buf_ptr;
if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
val = *buf_ptr++;
goto found;
}
skipped++;
}
buf_ptr = buf_end;
val = -1;
found:
ff_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;
const uint8_t *ptr = src;
uint8_t *dst = s->buffer;
#define copy_data_segment(skip) do { \
ptrdiff_t length = (ptr - src) - (skip); \
if (length > 0) { \
memcpy(dst, src, length); \
dst += length; \
src = ptr; \
} \
} while (0)
if (s->avctx->codec_id == AV_CODEC_ID_THP) {
ptr = buf_end;
copy_data_segment(0);
} else {
while (ptr < buf_end) {
uint8_t x = *(ptr++);
if (x == 0xff) {
ptrdiff_t skip = 0;
while (ptr < buf_end && x == 0xff) {
x = *(ptr++);
skip++;
}
/* 0xFF, 0xFF, ... */
if (skip > 1) {
copy_data_segment(skip);
/* decrement src as it is equal to ptr after the
* copy_data_segment macro and we might want to
* copy the current value of x later on */
src--;
}
if (x < 0xd0 || x > 0xd7) {
copy_data_segment(1);
if (x)
break;
}
}
}
if (src < ptr)
copy_data_segment(0);
}
#undef copy_data_segment
*unescaped_buf_ptr = s->buffer;
*unescaped_buf_size = dst - s->buffer;
memset(s->buffer + *unescaped_buf_size, 0,
AV_INPUT_BUFFER_PADDING_SIZE);
av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %"PTRDIFF_SPECIFIER" 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;
/* 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 -= FFMIN(2, t);
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 && b < t) {
x = src[b++];
if (x & 0x80) {
av_log(s->avctx, AV_LOG_WARNING, "Invalid escape sequence\n");
x &= 0x7f;
}
put_bits(&pb, 7, x);
bit_count--;
}
}
flush_put_bits(&pb);
*unescaped_buf_ptr = dst;
*unescaped_buf_size = (bit_count + 7) >> 3;
memset(s->buffer + *unescaped_buf_size, 0,
AV_INPUT_BUFFER_PADDING_SIZE);
} 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 *got_frame,
AVPacket *avpkt)
{
AVFrame *frame = data;
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 hshift, vshift;
int unescaped_buf_size;
int start_code;
int i, index;
int ret = 0;
int is16bit;
av_dict_free(&s->exif_metadata);
av_freep(&s->stereo3d);
s->adobe_transform = -1;
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) {
break;
} else if (unescaped_buf_size > INT_MAX / 8) {
av_log(avctx, AV_LOG_ERROR,
"MJPEG packet 0x%x too big (%d/%d), corrupt data?\n",
start_code, unescaped_buf_size, buf_size);
return AVERROR_INVALIDDATA;
}
av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%"PTRDIFF_SPECIFIER"\n",
start_code, buf_end - buf_ptr);
ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size);
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR, "invalid buffer\n");
goto fail;
}
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);
ret = -1;
if (!CONFIG_JPEGLS_DECODER &&
(start_code == SOF48 || start_code == LSE)) {
av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
return AVERROR(ENOSYS);
}
if (avctx->skip_frame == AVDISCARD_ALL) {
switch(start_code) {
case SOF0:
case SOF1:
case SOF2:
case SOF3:
case SOF48:
case SOI:
case SOS:
case EOI:
break;
default:
goto skip;
}
}
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 ((ret = ff_mjpeg_decode_dht(s)) < 0) {
av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
goto fail;
}
break;
case SOF0:
case SOF1:
s->lossless = 0;
s->ls = 0;
s->progressive = 0;
if ((ret = ff_mjpeg_decode_sof(s)) < 0)
goto fail;
break;
case SOF2:
s->lossless = 0;
s->ls = 0;
s->progressive = 1;
if ((ret = ff_mjpeg_decode_sof(s)) < 0)
goto fail;
break;
case SOF3:
s->avctx->properties |= FF_CODEC_PROPERTY_LOSSLESS;
s->lossless = 1;
s->ls = 0;
s->progressive = 0;
if ((ret = ff_mjpeg_decode_sof(s)) < 0)
goto fail;
break;
case SOF48:
s->avctx->properties |= FF_CODEC_PROPERTY_LOSSLESS;
s->lossless = 1;
s->ls = 1;
s->progressive = 0;
if ((ret = ff_mjpeg_decode_sof(s)) < 0)
goto fail;
break;
case LSE:
if (!CONFIG_JPEGLS_DECODER ||
(ret = ff_jpegls_decode_lse(s)) < 0)
goto fail;
break;
case EOI:
eoi_parser:
s->cur_scan = 0;
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)
break;
}
if (avctx->skip_frame == AVDISCARD_ALL) {
s->got_picture = 0;
goto the_end_no_picture;
}
if ((ret = av_frame_ref(frame, s->picture_ptr)) < 0)
return ret;
*got_frame = 1;
s->got_picture = 0;
if (!s->lossless) {
int qp = FFMAX3(s->qscale[0],
s->qscale[1],
s->qscale[2]);
int qpw = (s->width + 15) / 16;
AVBufferRef *qp_table_buf = av_buffer_alloc(qpw);
if (qp_table_buf) {
memset(qp_table_buf->data, qp, qpw);
av_frame_set_qp_table(data, qp_table_buf, 0, FF_QSCALE_TYPE_MPEG1);
}
if(avctx->debug & FF_DEBUG_QP)
av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", qp);
}
goto the_end;
case SOS:
s->cur_scan++;
if (avctx->skip_frame == AVDISCARD_ALL)
break;
if ((ret = ff_mjpeg_decode_sos(s, NULL, 0, NULL)) < 0 &&
(avctx->err_recognition & AV_EF_EXPLODE))
goto fail;
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;
}
skip:
/* 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 && s->cur_scan) {
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 AVERROR_INVALIDDATA;
fail:
s->got_picture = 0;
return ret;
the_end:
is16bit = av_pix_fmt_desc_get(s->avctx->pix_fmt)->comp[0].step > 1;
if (AV_RB32(s->upscale_h)) {
int p;
av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
avctx->pix_fmt == AV_PIX_FMT_YUV420P16||
avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
avctx->pix_fmt == AV_PIX_FMT_GBRP ||
avctx->pix_fmt == AV_PIX_FMT_GBRAP
);
avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
av_assert0(s->nb_components == av_pix_fmt_count_planes(s->picture_ptr->format));
for (p = 0; p<s->nb_components; p++) {
uint8_t *line = s->picture_ptr->data[p];
int w = s->width;
int h = s->height;
if (!s->upscale_h[p])
continue;
if (p==1 || p==2) {
w = AV_CEIL_RSHIFT(w, hshift);
h = AV_CEIL_RSHIFT(h, vshift);
}
if (s->upscale_v[p])
h = (h+1)>>1;
av_assert0(w > 0);
for (i = 0; i < h; i++) {
if (s->upscale_h[p] == 1) {
if (is16bit) ((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 2];
else line[w - 1] = line[(w - 1) / 2];
for (index = w - 2; index > 0; index--) {
if (is16bit)
((uint16_t*)line)[index] = (((uint16_t*)line)[index / 2] + ((uint16_t*)line)[(index + 1) / 2]) >> 1;
else
line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
}
} else if (s->upscale_h[p] == 2) {
if (is16bit) {
((uint16_t*)line)[w - 1] = ((uint16_t*)line)[(w - 1) / 3];
if (w > 1)
((uint16_t*)line)[w - 2] = ((uint16_t*)line)[w - 1];
} else {
line[w - 1] = line[(w - 1) / 3];
if (w > 1)
line[w - 2] = line[w - 1];
}
for (index = w - 3; index > 0; index--) {
line[index] = (line[index / 3] + line[(index + 1) / 3] + line[(index + 2) / 3] + 1) / 3;
}
}
line += s->linesize[p];
}
}
}
if (AV_RB32(s->upscale_v)) {
int p;
av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
avctx->pix_fmt == AV_PIX_FMT_YUV440P ||
avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
avctx->pix_fmt == AV_PIX_FMT_YUVA420P ||
avctx->pix_fmt == AV_PIX_FMT_YUVA420P16||
avctx->pix_fmt == AV_PIX_FMT_GBRP ||
avctx->pix_fmt == AV_PIX_FMT_GBRAP
);
avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
av_assert0(s->nb_components == av_pix_fmt_count_planes(s->picture_ptr->format));
for (p = 0; p < s->nb_components; p++) {
uint8_t *dst;
int w = s->width;
int h = s->height;
if (!s->upscale_v[p])
continue;
if (p==1 || p==2) {
w = AV_CEIL_RSHIFT(w, hshift);
h = AV_CEIL_RSHIFT(h, vshift);
}
dst = &((uint8_t *)s->picture_ptr->data[p])[(h - 1) * s->linesize[p]];
for (i = h - 1; i; i--) {
uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[p])[i / 2 * s->linesize[p]];
uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[p])[(i + 1) / 2 * s->linesize[p]];
if (src1 == src2 || i == h - 1) {
memcpy(dst, src1, w);
} else {
for (index = 0; index < w; index++)
dst[index] = (src1[index] + src2[index]) >> 1;
}
dst -= s->linesize[p];
}
}
}
if (s->flipped) {
int j;
avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
av_assert0(s->nb_components == av_pix_fmt_count_planes(s->picture_ptr->format));
for (index=0; index<s->nb_components; index++) {
uint8_t *dst = s->picture_ptr->data[index];
int w = s->picture_ptr->width;
int h = s->picture_ptr->height;
if(index && index<3){
w = AV_CEIL_RSHIFT(w, hshift);
h = AV_CEIL_RSHIFT(h, vshift);
}
if(dst){
uint8_t *dst2 = dst + s->picture_ptr->linesize[index]*(h-1);
for (i=0; i<h/2; i++) {
for (j=0; j<w; j++)
FFSWAP(int, dst[j], dst2[j]);
dst += s->picture_ptr->linesize[index];
dst2 -= s->picture_ptr->linesize[index];
}
}
}
}
if (s->adobe_transform == 0 && s->avctx->pix_fmt == AV_PIX_FMT_GBRAP) {
int w = s->picture_ptr->width;
int h = s->picture_ptr->height;
av_assert0(s->nb_components == 4);
for (i=0; i<h; i++) {
int j;
uint8_t *dst[4];
for (index=0; index<4; index++) {
dst[index] = s->picture_ptr->data[index]
+ s->picture_ptr->linesize[index]*i;
}
for (j=0; j<w; j++) {
int k = dst[3][j];
int r = dst[0][j] * k;
int g = dst[1][j] * k;
int b = dst[2][j] * k;
dst[0][j] = g*257 >> 16;
dst[1][j] = b*257 >> 16;
dst[2][j] = r*257 >> 16;
dst[3][j] = 255;
}
}
}
if (s->adobe_transform == 2 && s->avctx->pix_fmt == AV_PIX_FMT_YUVA444P) {
int w = s->picture_ptr->width;
int h = s->picture_ptr->height;
av_assert0(s->nb_components == 4);
for (i=0; i<h; i++) {
int j;
uint8_t *dst[4];
for (index=0; index<4; index++) {
dst[index] = s->picture_ptr->data[index]
+ s->picture_ptr->linesize[index]*i;
}
for (j=0; j<w; j++) {
int k = dst[3][j];
int r = (255 - dst[0][j]) * k;
int g = (128 - dst[1][j]) * k;
int b = (128 - dst[2][j]) * k;
dst[0][j] = r*257 >> 16;
dst[1][j] = (g*257 >> 16) + 128;
dst[2][j] = (b*257 >> 16) + 128;
dst[3][j] = 255;
}
}
}
if (s->stereo3d) {
AVStereo3D *stereo = av_stereo3d_create_side_data(data);
if (stereo) {
stereo->type = s->stereo3d->type;
stereo->flags = s->stereo3d->flags;
}
av_freep(&s->stereo3d);
}
av_dict_copy(avpriv_frame_get_metadatap(data), s->exif_metadata, 0);
av_dict_free(&s->exif_metadata);
the_end_no_picture:
av_log(avctx, AV_LOG_DEBUG, "decode frame unused %"PTRDIFF_SPECIFIER" 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->interlaced && s->bottom_field == !s->interlace_polarity && s->got_picture && !avctx->frame_number) {
av_log(avctx, AV_LOG_INFO, "Single field\n");
}
if (s->picture) {
av_frame_free(&s->picture);
s->picture_ptr = NULL;
} else if (s->picture_ptr)
av_frame_unref(s->picture_ptr);
av_freep(&s->buffer);
av_freep(&s->stereo3d);
av_freep(&s->ljpeg_buffer);
s->ljpeg_buffer_size = 0;
for (i = 0; i < 3; i++) {
for (j = 0; j < 4; j++)
ff_free_vlc(&s->vlcs[i][j]);
}
for (i = 0; i < MAX_COMPONENTS; i++) {
av_freep(&s->blocks[i]);
av_freep(&s->last_nnz[i]);
}
av_dict_free(&s->exif_metadata);
return 0;
}
static void decode_flush(AVCodecContext *avctx)
{
MJpegDecodeContext *s = avctx->priv_data;
s->got_picture = 0;
}
#if CONFIG_MJPEG_DECODER
#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_BOOL, { .i64 = 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",
.long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_MJPEG,
.priv_data_size = sizeof(MJpegDecodeContext),
.init = ff_mjpeg_decode_init,
.close = ff_mjpeg_decode_end,
.decode = ff_mjpeg_decode_frame,
.flush = decode_flush,
.capabilities = AV_CODEC_CAP_DR1,
.max_lowres = 3,
.priv_class = &mjpegdec_class,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
};
#endif
#if CONFIG_THP_DECODER
AVCodec ff_thp_decoder = {
.name = "thp",
.long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_THP,
.priv_data_size = sizeof(MJpegDecodeContext),
.init = ff_mjpeg_decode_init,
.close = ff_mjpeg_decode_end,
.decode = ff_mjpeg_decode_frame,
.flush = decode_flush,
.capabilities = AV_CODEC_CAP_DR1,
.max_lowres = 3,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
};
#endif
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