0,0 → 1,2108 |
/* |
* 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 "copy_block.h" |
#include "internal.h" |
#include "mjpeg.h" |
#include "mjpegdec.h" |
#include "jpeglsdec.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); |
} |
|
av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx) |
{ |
MJpegDecodeContext *s = avctx->priv_data; |
|
if (!s->picture_ptr) |
s->picture_ptr = &s->picture; |
avcodec_get_frame_defaults(&s->picture); |
|
s->avctx = avctx; |
ff_hpeldsp_init(&s->hdsp, avctx->flags); |
ff_dsputil_init(&s->dsp, avctx); |
ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct); |
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; |
|
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"); |
} |
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; |
|
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 -= 65; |
} |
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; |
|
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, pix_fmt_id; |
int h_count[MAX_COMPONENTS]; |
int v_count[MAX_COMPONENTS]; |
|
s->cur_scan = 0; |
s->upscale_h = s->upscale_v = 0; |
|
/* XXX: verify len field validity */ |
len = get_bits(&s->gb, 16); |
s->avctx->bits_per_raw_sample = |
s->bits = get_bits(&s->gb, 8); |
|
if (s->pegasus_rct) |
s->bits = 9; |
if (s->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 && !(s->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; |
memset(h_count, 0, sizeof(h_count)); |
memset(v_count, 0, sizeof(v_count)); |
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 (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 |
|| memcmp(s->h_count, h_count, sizeof(h_count)) |
|| memcmp(s->v_count, v_count, sizeof(v_count))) { |
|
s->width = width; |
s->height = height; |
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->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; |
} |
|
avcodec_set_dimensions(s->avctx, width, height); |
|
s->first_picture = 0; |
} |
|
if (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 = (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; |
|
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 { |
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 0x12121100: |
case 0x22122100: |
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; |
s->upscale_v = 2; |
s->upscale_h = (pix_fmt_id == 0x22122100); |
s->chroma_height = s->height; |
break; |
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; |
s->upscale_v = (pix_fmt_id == 0x22211200); |
s->upscale_h = 2; |
s->chroma_height = s->height; |
break; |
case 0x22221100: |
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; |
s->upscale_v = 2; |
s->upscale_h = 2; |
s->chroma_height = s->height / 2; |
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 0x22211100: |
case 0x22112100: |
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; |
s->upscale_h = (pix_fmt_id == 0x22211100) * 2 + (pix_fmt_id == 0x22112100); |
s->chroma_height = s->height / 2; |
break; |
case 0x21111100: |
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 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; |
s->upscale_v = (pix_fmt_id == 0x22121100) + 1; |
break; |
case 0x22111100: |
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; |
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\n", pix_fmt_id); |
return AVERROR_PATCHWELCOME; |
} |
if ((s->upscale_h || 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) { |
s->upscale_h = s->upscale_v = 0; |
if (s->nb_components > 1) |
s->avctx->pix_fmt = AV_PIX_FMT_RGB24; |
else if (s->bits <= 8) |
s->avctx->pix_fmt = AV_PIX_FMT_GRAY8; |
else |
s->avctx->pix_fmt = AV_PIX_FMT_GRAY16; |
} |
|
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 < 3; i++) |
s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced; |
|
av_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) { |
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_malloc(size * sizeof(**s->blocks)); |
s->last_nnz[i] = av_mallocz(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]; |
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->dsp.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]^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 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.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 << point_transform)); |
} |
|
if (s->restart_interval && !--s->restart_count) { |
align_get_bits(&s->gb); |
skip_bits(&s->gb, 16); /* skip RSTn */ |
} |
} |
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(bits<=8){ |
ptr = s->picture.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.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(bits<=8){ |
ptr = s->picture.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.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, |
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; |
int bytes_per_pixel = 1 + (s->bits > 8); |
|
if (mb_bitmask) |
init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height); |
|
if (s->flipped && s->avctx->lowres) { |
av_log(s->avctx, AV_LOG_ERROR, "Can not flip image with lowres\n"); |
s->flipped = 0; |
} |
s->restart_count = 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 && !(s->avctx->flags & CODEC_FLAG_EMU_EDGE)) { |
// 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_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; |
ptr = data[c] + block_offset; |
if (!s->progressive) { |
if (copy_mb) |
mjpeg_copy_block(s, 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_sindex[i]]) < 0) { |
av_log(s->avctx, AV_LOG_ERROR, |
"error y=%d x=%d\n", mb_y, mb_x); |
return AVERROR_INVALIDDATA; |
} |
s->dsp.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; |
} |
} |
av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x); |
av_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.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; |
} |
|
if (!Al) { |
s->coefs_finished[c] |= (1LL << (se + 1)) - (1LL << ss); |
last_scan = !~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->dsp.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, |
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, 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 < 5) |
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) |
av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X len=%d\n", 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->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") && (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_RB32("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); /* 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: |
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 %d\n", i); |
} |
len -= 9; |
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; |
} |
|
/* EXIF metadata */ |
if (s->start_code == APP1 && id == AV_RB32("Exif")) { |
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"); |
return ret; |
} |
|
bytestream2_seek(&gbytes, ifd_offset, SEEK_SET); |
|
// read 0th IFD and store the metadata |
// (return values > 0 indicate the presence of subimage metadata) |
ret = ff_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"); |
return ret; |
} |
|
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)) { |
s->buggy_avid = 1; |
if (len > 14 && cbuf[12] == 1) /* 1 - NTSC, 2 - PAL */ |
s->interlace_polarity = 1; |
} else if (!strcmp(cbuf, "CS=ITU601")) |
s->cs_itu601 = 1; |
else if ((!strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32)) || |
(!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; |
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: |
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 != AV_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; |
memset(s->buffer + *unescaped_buf_size, 0, |
FF_INPUT_BUFFER_PADDING_SIZE); |
|
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 -= 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) { |
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; |
memset(s->buffer + *unescaped_buf_size, 0, |
FF_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) |
{ |
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; |
|
av_dict_free(&s->exif_metadata); |
|
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 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=%td\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); |
} |
|
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->lossless = 1; |
s->ls = 0; |
s->progressive = 0; |
if ((ret = ff_mjpeg_decode_sof(s)) < 0) |
goto fail; |
break; |
case SOF48: |
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 ((ret = av_frame_ref(data, 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: |
if ((ret = ff_mjpeg_decode_sos(s, NULL, 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; |
} |
|
/* 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 AVERROR_INVALIDDATA; |
fail: |
s->got_picture = 0; |
return ret; |
the_end: |
if (s->upscale_h) { |
uint8_t *line = s->picture_ptr->data[s->upscale_h]; |
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); |
for (i = 0; i < s->chroma_height; i++) { |
for (index = s->width - 1; index; index--) |
line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1; |
line += s->linesize[s->upscale_h]; |
} |
} |
if (s->upscale_v) { |
uint8_t *dst = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(s->height - 1) * s->linesize[s->upscale_v]]; |
int w; |
avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift); |
w = s->width >> hshift; |
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); |
for (i = s->height - 1; i; i--) { |
uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[i / 2 * s->linesize[s->upscale_v]]; |
uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(i + 1) / 2 * s->linesize[s->upscale_v]]; |
if (src1 == src2) { |
memcpy(dst, src1, w); |
} else { |
for (index = 0; index < w; index++) |
dst[index] = (src1[index] + src2[index]) >> 1; |
} |
dst -= s->linesize[s->upscale_v]; |
} |
} |
if (s->flipped && (s->avctx->flags & CODEC_FLAG_EMU_EDGE)) { |
int j; |
avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift); |
for (index=0; index<4; index++) { |
uint8_t *dst = s->picture_ptr->data[index]; |
int w = s->width; |
int h = s->height; |
if(index && index<3){ |
w = FF_CEIL_RSHIFT(w, hshift); |
h = FF_CEIL_RSHIFT(h, vshift); |
} |
if(dst){ |
uint8_t *dst2 = dst + s->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->linesize[index]; |
dst2 -= s->linesize[index]; |
} |
} |
} |
} |
|
av_dict_copy(avpriv_frame_get_metadatap(data), s->exif_metadata, 0); |
av_dict_free(&s->exif_metadata); |
|
av_log(avctx, AV_LOG_DEBUG, "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->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_ptr) |
av_frame_unref(s->picture_ptr); |
|
av_free(s->buffer); |
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_INT, { .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 = CODEC_CAP_DR1, |
.max_lowres = 3, |
.priv_class = &mjpegdec_class, |
}; |
#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 = CODEC_CAP_DR1, |
.max_lowres = 3, |
}; |
#endif |