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Diffstat (limited to 'ffmpeg/libavcodec/mjpegdec.c')
-rw-r--r--ffmpeg/libavcodec/mjpegdec.c2116
1 files changed, 0 insertions, 2116 deletions
diff --git a/ffmpeg/libavcodec/mjpegdec.c b/ffmpeg/libavcodec/mjpegdec.c
deleted file mode 100644
index e86e093..0000000
--- a/ffmpeg/libavcodec/mjpegdec.c
+++ /dev/null
@@ -1,2116 +0,0 @@
-/*
- * 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 = av_frame_alloc();
- if (!s->picture)
- return AVERROR(ENOMEM);
- s->picture_ptr = 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, ret;
- 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;
- }
-
- ret = ff_set_dimensions(s->avctx, width, height);
- if (ret < 0)
- return ret;
-
- 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_mallocz(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_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 << 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_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(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,
- 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_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;
- }
-
- 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 < 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)
- 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") && 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");
- 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) {
- av_frame_free(&s->picture);
- s->picture_ptr = NULL;
- } else 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
generated by cgit v1.2.3 (git 2.39.1) at 2025-12-06 12:53:39 +0000