yading@10: /* yading@10: * MJPEG decoder yading@10: * Copyright (c) 2000, 2001 Fabrice Bellard yading@10: * Copyright (c) 2003 Alex Beregszaszi yading@10: * Copyright (c) 2003-2004 Michael Niedermayer yading@10: * yading@10: * Support for external huffman table, various fixes (AVID workaround), yading@10: * aspecting, new decode_frame mechanism and apple mjpeg-b support yading@10: * by Alex Beregszaszi yading@10: * yading@10: * This file is part of FFmpeg. yading@10: * yading@10: * FFmpeg is free software; you can redistribute it and/or yading@10: * modify it under the terms of the GNU Lesser General Public yading@10: * License as published by the Free Software Foundation; either yading@10: * version 2.1 of the License, or (at your option) any later version. yading@10: * yading@10: * FFmpeg is distributed in the hope that it will be useful, yading@10: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@10: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU yading@10: * Lesser General Public License for more details. yading@10: * yading@10: * You should have received a copy of the GNU Lesser General Public yading@10: * License along with FFmpeg; if not, write to the Free Software yading@10: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@10: */ yading@10: yading@10: /** yading@10: * @file yading@10: * MJPEG decoder. yading@10: */ yading@10: yading@10: #include "libavutil/imgutils.h" yading@10: #include "libavutil/avassert.h" yading@10: #include "libavutil/opt.h" yading@10: #include "avcodec.h" yading@10: #include "copy_block.h" yading@10: #include "internal.h" yading@10: #include "mjpeg.h" yading@10: #include "mjpegdec.h" yading@10: #include "jpeglsdec.h" yading@10: yading@10: yading@10: static int build_vlc(VLC *vlc, const uint8_t *bits_table, yading@10: const uint8_t *val_table, int nb_codes, yading@10: int use_static, int is_ac) yading@10: { yading@10: uint8_t huff_size[256] = { 0 }; yading@10: uint16_t huff_code[256]; yading@10: uint16_t huff_sym[256]; yading@10: int i; yading@10: yading@10: av_assert0(nb_codes <= 256); yading@10: yading@10: ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table); yading@10: yading@10: for (i = 0; i < 256; i++) yading@10: huff_sym[i] = i + 16 * is_ac; yading@10: yading@10: if (is_ac) yading@10: huff_sym[0] = 16 * 256; yading@10: yading@10: return ff_init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1, yading@10: huff_code, 2, 2, huff_sym, 2, 2, use_static); yading@10: } yading@10: yading@10: static void build_basic_mjpeg_vlc(MJpegDecodeContext *s) yading@10: { yading@10: build_vlc(&s->vlcs[0][0], avpriv_mjpeg_bits_dc_luminance, yading@10: avpriv_mjpeg_val_dc, 12, 0, 0); yading@10: build_vlc(&s->vlcs[0][1], avpriv_mjpeg_bits_dc_chrominance, yading@10: avpriv_mjpeg_val_dc, 12, 0, 0); yading@10: build_vlc(&s->vlcs[1][0], avpriv_mjpeg_bits_ac_luminance, yading@10: avpriv_mjpeg_val_ac_luminance, 251, 0, 1); yading@10: build_vlc(&s->vlcs[1][1], avpriv_mjpeg_bits_ac_chrominance, yading@10: avpriv_mjpeg_val_ac_chrominance, 251, 0, 1); yading@10: build_vlc(&s->vlcs[2][0], avpriv_mjpeg_bits_ac_luminance, yading@10: avpriv_mjpeg_val_ac_luminance, 251, 0, 0); yading@10: build_vlc(&s->vlcs[2][1], avpriv_mjpeg_bits_ac_chrominance, yading@10: avpriv_mjpeg_val_ac_chrominance, 251, 0, 0); yading@10: } yading@10: yading@10: av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx) yading@10: { yading@10: MJpegDecodeContext *s = avctx->priv_data; yading@10: yading@10: if (!s->picture_ptr) yading@10: s->picture_ptr = &s->picture; yading@10: avcodec_get_frame_defaults(&s->picture); yading@10: yading@10: s->avctx = avctx; yading@10: ff_hpeldsp_init(&s->hdsp, avctx->flags); yading@10: ff_dsputil_init(&s->dsp, avctx); yading@10: ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct); yading@10: s->buffer_size = 0; yading@10: s->buffer = NULL; yading@10: s->start_code = -1; yading@10: s->first_picture = 1; yading@10: s->got_picture = 0; yading@10: s->org_height = avctx->coded_height; yading@10: avctx->chroma_sample_location = AVCHROMA_LOC_CENTER; yading@10: yading@10: build_basic_mjpeg_vlc(s); yading@10: yading@10: if (s->extern_huff) { yading@10: av_log(avctx, AV_LOG_INFO, "using external huffman table\n"); yading@10: init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8); yading@10: if (ff_mjpeg_decode_dht(s)) { yading@10: av_log(avctx, AV_LOG_ERROR, yading@10: "error using external huffman table, switching back to internal\n"); yading@10: build_basic_mjpeg_vlc(s); yading@10: } yading@10: } yading@10: if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */ yading@10: s->interlace_polarity = 1; /* bottom field first */ yading@10: av_log(avctx, AV_LOG_DEBUG, "bottom field first\n"); yading@10: } yading@10: if (avctx->codec->id == AV_CODEC_ID_AMV) yading@10: s->flipped = 1; yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: yading@10: /* quantize tables */ yading@10: int ff_mjpeg_decode_dqt(MJpegDecodeContext *s) yading@10: { yading@10: int len, index, i, j; yading@10: yading@10: len = get_bits(&s->gb, 16) - 2; yading@10: yading@10: while (len >= 65) { yading@10: int pr = get_bits(&s->gb, 4); yading@10: if (pr > 1) { yading@10: av_log(s->avctx, AV_LOG_ERROR, "dqt: invalid precision\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: index = get_bits(&s->gb, 4); yading@10: if (index >= 4) yading@10: return -1; yading@10: av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index); yading@10: /* read quant table */ yading@10: for (i = 0; i < 64; i++) { yading@10: j = s->scantable.permutated[i]; yading@10: s->quant_matrixes[index][j] = get_bits(&s->gb, pr ? 16 : 8); yading@10: } yading@10: yading@10: // XXX FIXME finetune, and perhaps add dc too yading@10: s->qscale[index] = FFMAX(s->quant_matrixes[index][s->scantable.permutated[1]], yading@10: s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1; yading@10: av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n", yading@10: index, s->qscale[index]); yading@10: len -= 65; yading@10: } yading@10: return 0; yading@10: } yading@10: yading@10: /* decode huffman tables and build VLC decoders */ yading@10: int ff_mjpeg_decode_dht(MJpegDecodeContext *s) yading@10: { yading@10: int len, index, i, class, n, v, code_max; yading@10: uint8_t bits_table[17]; yading@10: uint8_t val_table[256]; yading@10: int ret = 0; yading@10: yading@10: len = get_bits(&s->gb, 16) - 2; yading@10: yading@10: while (len > 0) { yading@10: if (len < 17) yading@10: return AVERROR_INVALIDDATA; yading@10: class = get_bits(&s->gb, 4); yading@10: if (class >= 2) yading@10: return AVERROR_INVALIDDATA; yading@10: index = get_bits(&s->gb, 4); yading@10: if (index >= 4) yading@10: return AVERROR_INVALIDDATA; yading@10: n = 0; yading@10: for (i = 1; i <= 16; i++) { yading@10: bits_table[i] = get_bits(&s->gb, 8); yading@10: n += bits_table[i]; yading@10: } yading@10: len -= 17; yading@10: if (len < n || n > 256) yading@10: return AVERROR_INVALIDDATA; yading@10: yading@10: code_max = 0; yading@10: for (i = 0; i < n; i++) { yading@10: v = get_bits(&s->gb, 8); yading@10: if (v > code_max) yading@10: code_max = v; yading@10: val_table[i] = v; yading@10: } yading@10: len -= n; yading@10: yading@10: /* build VLC and flush previous vlc if present */ yading@10: ff_free_vlc(&s->vlcs[class][index]); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n", yading@10: class, index, code_max + 1); yading@10: if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table, yading@10: code_max + 1, 0, class > 0)) < 0) yading@10: return ret; yading@10: yading@10: if (class > 0) { yading@10: ff_free_vlc(&s->vlcs[2][index]); yading@10: if ((ret = build_vlc(&s->vlcs[2][index], bits_table, val_table, yading@10: code_max + 1, 0, 0)) < 0) yading@10: return ret; yading@10: } yading@10: } yading@10: return 0; yading@10: } yading@10: yading@10: int ff_mjpeg_decode_sof(MJpegDecodeContext *s) yading@10: { yading@10: int len, nb_components, i, width, height, pix_fmt_id; yading@10: int h_count[MAX_COMPONENTS]; yading@10: int v_count[MAX_COMPONENTS]; yading@10: yading@10: s->cur_scan = 0; yading@10: s->upscale_h = s->upscale_v = 0; yading@10: yading@10: /* XXX: verify len field validity */ yading@10: len = get_bits(&s->gb, 16); yading@10: s->bits = get_bits(&s->gb, 8); yading@10: yading@10: if (s->pegasus_rct) yading@10: s->bits = 9; yading@10: if (s->bits == 9 && !s->pegasus_rct) yading@10: s->rct = 1; // FIXME ugly yading@10: yading@10: if (s->bits != 8 && !s->lossless) { yading@10: av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\n"); yading@10: return -1; yading@10: } yading@10: yading@10: if(s->lossless && s->avctx->lowres){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "lowres is not possible with lossless jpeg\n"); yading@10: return -1; yading@10: } yading@10: yading@10: height = get_bits(&s->gb, 16); yading@10: width = get_bits(&s->gb, 16); yading@10: yading@10: // HACK for odd_height.mov yading@10: if (s->interlaced && s->width == width && s->height == height + 1) yading@10: height= s->height; yading@10: yading@10: av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height); yading@10: if (av_image_check_size(width, height, 0, s->avctx)) yading@10: return AVERROR_INVALIDDATA; yading@10: yading@10: nb_components = get_bits(&s->gb, 8); yading@10: if (nb_components <= 0 || yading@10: nb_components > MAX_COMPONENTS) yading@10: return -1; yading@10: if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) { yading@10: if (nb_components != s->nb_components) { yading@10: av_log(s->avctx, AV_LOG_ERROR, "nb_components changing in interlaced picture\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: } yading@10: if (s->ls && !(s->bits <= 8 || nb_components == 1)) { yading@10: avpriv_report_missing_feature(s->avctx, yading@10: "JPEG-LS that is not <= 8 " yading@10: "bits/component or 16-bit gray"); yading@10: return AVERROR_PATCHWELCOME; yading@10: } yading@10: s->nb_components = nb_components; yading@10: s->h_max = 1; yading@10: s->v_max = 1; yading@10: memset(h_count, 0, sizeof(h_count)); yading@10: memset(v_count, 0, sizeof(v_count)); yading@10: for (i = 0; i < nb_components; i++) { yading@10: /* component id */ yading@10: s->component_id[i] = get_bits(&s->gb, 8) - 1; yading@10: h_count[i] = get_bits(&s->gb, 4); yading@10: v_count[i] = get_bits(&s->gb, 4); yading@10: /* compute hmax and vmax (only used in interleaved case) */ yading@10: if (h_count[i] > s->h_max) yading@10: s->h_max = h_count[i]; yading@10: if (v_count[i] > s->v_max) yading@10: s->v_max = v_count[i]; yading@10: if (!h_count[i] || !v_count[i]) { yading@10: av_log(s->avctx, AV_LOG_ERROR, "h/v_count is 0\n"); yading@10: return -1; yading@10: } yading@10: s->quant_index[i] = get_bits(&s->gb, 8); yading@10: if (s->quant_index[i] >= 4) { yading@10: av_log(s->avctx, AV_LOG_ERROR, "quant_index is invalid\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n", yading@10: i, h_count[i], v_count[i], yading@10: s->component_id[i], s->quant_index[i]); yading@10: } yading@10: yading@10: if (s->ls && (s->h_max > 1 || s->v_max > 1)) { yading@10: avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS"); yading@10: return AVERROR_PATCHWELCOME; yading@10: } yading@10: yading@10: yading@10: /* if different size, realloc/alloc picture */ yading@10: if ( width != s->width || height != s->height yading@10: || memcmp(s->h_count, h_count, sizeof(h_count)) yading@10: || memcmp(s->v_count, v_count, sizeof(v_count))) { yading@10: yading@10: s->width = width; yading@10: s->height = height; yading@10: memcpy(s->h_count, h_count, sizeof(h_count)); yading@10: memcpy(s->v_count, v_count, sizeof(v_count)); yading@10: s->interlaced = 0; yading@10: s->got_picture = 0; yading@10: yading@10: /* test interlaced mode */ yading@10: if (s->first_picture && yading@10: s->org_height != 0 && yading@10: s->height < ((s->org_height * 3) / 4)) { yading@10: s->interlaced = 1; yading@10: s->bottom_field = s->interlace_polarity; yading@10: s->picture_ptr->interlaced_frame = 1; yading@10: s->picture_ptr->top_field_first = !s->interlace_polarity; yading@10: height *= 2; yading@10: } yading@10: yading@10: avcodec_set_dimensions(s->avctx, width, height); yading@10: yading@10: s->first_picture = 0; yading@10: } yading@10: yading@10: if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) { yading@10: if (s->progressive) { yading@10: avpriv_request_sample(s->avctx, "progressively coded interlaced picture"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: } else{ yading@10: if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && nb_components==3) yading@10: s->rgb = 1; yading@10: else if (!s->lossless) yading@10: s->rgb = 0; yading@10: /* XXX: not complete test ! */ yading@10: pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) | yading@10: (s->h_count[1] << 20) | (s->v_count[1] << 16) | yading@10: (s->h_count[2] << 12) | (s->v_count[2] << 8) | yading@10: (s->h_count[3] << 4) | s->v_count[3]; yading@10: av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id); yading@10: /* NOTE we do not allocate pictures large enough for the possible yading@10: * padding of h/v_count being 4 */ yading@10: if (!(pix_fmt_id & 0xD0D0D0D0)) yading@10: pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1; yading@10: if (!(pix_fmt_id & 0x0D0D0D0D)) yading@10: pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1; yading@10: yading@10: switch (pix_fmt_id) { yading@10: case 0x11111100: yading@10: if (s->rgb) yading@10: s->avctx->pix_fmt = AV_PIX_FMT_BGR24; yading@10: else { yading@10: if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') { yading@10: s->avctx->pix_fmt = AV_PIX_FMT_GBR24P; yading@10: } else { yading@10: s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P; yading@10: s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG; yading@10: } yading@10: } yading@10: av_assert0(s->nb_components == 3); yading@10: break; yading@10: case 0x12121100: yading@10: case 0x22122100: yading@10: s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P; yading@10: s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG; yading@10: s->upscale_v = 2; yading@10: s->upscale_h = (pix_fmt_id == 0x22122100); yading@10: s->chroma_height = s->height; yading@10: break; yading@10: case 0x21211100: yading@10: case 0x22211200: yading@10: s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P; yading@10: s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG; yading@10: s->upscale_v = (pix_fmt_id == 0x22211200); yading@10: s->upscale_h = 2; yading@10: s->chroma_height = s->height; yading@10: break; yading@10: case 0x22221100: yading@10: s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P; yading@10: s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG; yading@10: s->upscale_v = 2; yading@10: s->upscale_h = 2; yading@10: s->chroma_height = s->height / 2; yading@10: break; yading@10: case 0x11000000: yading@10: case 0x13000000: yading@10: case 0x14000000: yading@10: case 0x31000000: yading@10: case 0x33000000: yading@10: case 0x34000000: yading@10: case 0x41000000: yading@10: case 0x43000000: yading@10: case 0x44000000: yading@10: if(s->bits <= 8) yading@10: s->avctx->pix_fmt = AV_PIX_FMT_GRAY8; yading@10: else yading@10: s->avctx->pix_fmt = AV_PIX_FMT_GRAY16; yading@10: break; yading@10: case 0x12111100: yading@10: case 0x22211100: yading@10: case 0x22112100: yading@10: s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P; yading@10: s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG; yading@10: s->upscale_h = (pix_fmt_id == 0x22211100) * 2 + (pix_fmt_id == 0x22112100); yading@10: s->chroma_height = s->height / 2; yading@10: break; yading@10: case 0x21111100: yading@10: s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P; yading@10: s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG; yading@10: break; yading@10: case 0x22121100: yading@10: case 0x22111200: yading@10: s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P; yading@10: s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG; yading@10: s->upscale_v = (pix_fmt_id == 0x22121100) + 1; yading@10: break; yading@10: case 0x22111100: yading@10: s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P; yading@10: s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG; yading@10: break; yading@10: default: yading@10: av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id); yading@10: return AVERROR_PATCHWELCOME; yading@10: } yading@10: if ((s->upscale_h || s->upscale_v) && s->avctx->lowres) { yading@10: av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n"); yading@10: return AVERROR_PATCHWELCOME; yading@10: } yading@10: if (s->ls) { yading@10: s->upscale_h = s->upscale_v = 0; yading@10: if (s->nb_components > 1) yading@10: s->avctx->pix_fmt = AV_PIX_FMT_RGB24; yading@10: else if (s->bits <= 8) yading@10: s->avctx->pix_fmt = AV_PIX_FMT_GRAY8; yading@10: else yading@10: s->avctx->pix_fmt = AV_PIX_FMT_GRAY16; yading@10: } yading@10: yading@10: av_frame_unref(s->picture_ptr); yading@10: if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0) yading@10: return -1; yading@10: s->picture_ptr->pict_type = AV_PICTURE_TYPE_I; yading@10: s->picture_ptr->key_frame = 1; yading@10: s->got_picture = 1; yading@10: yading@10: for (i = 0; i < 3; i++) yading@10: s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced; yading@10: yading@10: av_dlog(s->avctx, "%d %d %d %d %d %d\n", yading@10: s->width, s->height, s->linesize[0], s->linesize[1], yading@10: s->interlaced, s->avctx->height); yading@10: yading@10: if (len != (8 + (3 * nb_components))) yading@10: av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len); yading@10: } yading@10: yading@10: if (s->rgb && !s->lossless && !s->ls) { yading@10: av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n"); yading@10: return AVERROR_PATCHWELCOME; yading@10: } yading@10: yading@10: /* totally blank picture as progressive JPEG will only add details to it */ yading@10: if (s->progressive) { yading@10: int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8); yading@10: int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8); yading@10: for (i = 0; i < s->nb_components; i++) { yading@10: int size = bw * bh * s->h_count[i] * s->v_count[i]; yading@10: av_freep(&s->blocks[i]); yading@10: av_freep(&s->last_nnz[i]); yading@10: s->blocks[i] = av_malloc(size * sizeof(**s->blocks)); yading@10: s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz)); yading@10: s->block_stride[i] = bw * s->h_count[i]; yading@10: } yading@10: memset(s->coefs_finished, 0, sizeof(s->coefs_finished)); yading@10: } yading@10: return 0; yading@10: } yading@10: yading@10: static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index) yading@10: { yading@10: int code; yading@10: code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2); yading@10: if (code < 0) { yading@10: av_log(s->avctx, AV_LOG_WARNING, yading@10: "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n", yading@10: 0, dc_index, &s->vlcs[0][dc_index]); yading@10: return 0xffff; yading@10: } yading@10: yading@10: if (code) yading@10: return get_xbits(&s->gb, code); yading@10: else yading@10: return 0; yading@10: } yading@10: yading@10: /* decode block and dequantize */ yading@10: static int decode_block(MJpegDecodeContext *s, int16_t *block, int component, yading@10: int dc_index, int ac_index, int16_t *quant_matrix) yading@10: { yading@10: int code, i, j, level, val; yading@10: yading@10: /* DC coef */ yading@10: val = mjpeg_decode_dc(s, dc_index); yading@10: if (val == 0xffff) { yading@10: av_log(s->avctx, AV_LOG_ERROR, "error dc\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: val = val * quant_matrix[0] + s->last_dc[component]; yading@10: s->last_dc[component] = val; yading@10: block[0] = val; yading@10: /* AC coefs */ yading@10: i = 0; yading@10: {OPEN_READER(re, &s->gb); yading@10: do { yading@10: UPDATE_CACHE(re, &s->gb); yading@10: GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2); yading@10: yading@10: i += ((unsigned)code) >> 4; yading@10: code &= 0xf; yading@10: if (code) { yading@10: if (code > MIN_CACHE_BITS - 16) yading@10: UPDATE_CACHE(re, &s->gb); yading@10: yading@10: { yading@10: int cache = GET_CACHE(re, &s->gb); yading@10: int sign = (~cache) >> 31; yading@10: level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign; yading@10: } yading@10: yading@10: LAST_SKIP_BITS(re, &s->gb, code); yading@10: yading@10: if (i > 63) { yading@10: av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: j = s->scantable.permutated[i]; yading@10: block[j] = level * quant_matrix[j]; yading@10: } yading@10: } while (i < 63); yading@10: CLOSE_READER(re, &s->gb);} yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block, yading@10: int component, int dc_index, yading@10: int16_t *quant_matrix, int Al) yading@10: { yading@10: int val; yading@10: s->dsp.clear_block(block); yading@10: val = mjpeg_decode_dc(s, dc_index); yading@10: if (val == 0xffff) { yading@10: av_log(s->avctx, AV_LOG_ERROR, "error dc\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: val = (val * quant_matrix[0] << Al) + s->last_dc[component]; yading@10: s->last_dc[component] = val; yading@10: block[0] = val; yading@10: return 0; yading@10: } yading@10: yading@10: /* decode block and dequantize - progressive JPEG version */ yading@10: static int decode_block_progressive(MJpegDecodeContext *s, int16_t *block, yading@10: uint8_t *last_nnz, int ac_index, yading@10: int16_t *quant_matrix, yading@10: int ss, int se, int Al, int *EOBRUN) yading@10: { yading@10: int code, i, j, level, val, run; yading@10: yading@10: if (*EOBRUN) { yading@10: (*EOBRUN)--; yading@10: return 0; yading@10: } yading@10: yading@10: { yading@10: OPEN_READER(re, &s->gb); yading@10: for (i = ss; ; i++) { yading@10: UPDATE_CACHE(re, &s->gb); yading@10: GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2); yading@10: yading@10: run = ((unsigned) code) >> 4; yading@10: code &= 0xF; yading@10: if (code) { yading@10: i += run; yading@10: if (code > MIN_CACHE_BITS - 16) yading@10: UPDATE_CACHE(re, &s->gb); yading@10: yading@10: { yading@10: int cache = GET_CACHE(re, &s->gb); yading@10: int sign = (~cache) >> 31; yading@10: level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign; yading@10: } yading@10: yading@10: LAST_SKIP_BITS(re, &s->gb, code); yading@10: yading@10: if (i >= se) { yading@10: if (i == se) { yading@10: j = s->scantable.permutated[se]; yading@10: block[j] = level * quant_matrix[j] << Al; yading@10: break; yading@10: } yading@10: av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: j = s->scantable.permutated[i]; yading@10: block[j] = level * quant_matrix[j] << Al; yading@10: } else { yading@10: if (run == 0xF) {// ZRL - skip 15 coefficients yading@10: i += 15; yading@10: if (i >= se) { yading@10: av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: } else { yading@10: val = (1 << run); yading@10: if (run) { yading@10: UPDATE_CACHE(re, &s->gb); yading@10: val += NEG_USR32(GET_CACHE(re, &s->gb), run); yading@10: LAST_SKIP_BITS(re, &s->gb, run); yading@10: } yading@10: *EOBRUN = val - 1; yading@10: break; yading@10: } yading@10: } yading@10: } yading@10: CLOSE_READER(re, &s->gb); yading@10: } yading@10: yading@10: if (i > *last_nnz) yading@10: *last_nnz = i; yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: #define REFINE_BIT(j) { \ yading@10: UPDATE_CACHE(re, &s->gb); \ yading@10: sign = block[j] >> 15; \ yading@10: block[j] += SHOW_UBITS(re, &s->gb, 1) * \ yading@10: ((quant_matrix[j] ^ sign) - sign) << Al; \ yading@10: LAST_SKIP_BITS(re, &s->gb, 1); \ yading@10: } yading@10: yading@10: #define ZERO_RUN \ yading@10: for (; ; i++) { \ yading@10: if (i > last) { \ yading@10: i += run; \ yading@10: if (i > se) { \ yading@10: av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \ yading@10: return -1; \ yading@10: } \ yading@10: break; \ yading@10: } \ yading@10: j = s->scantable.permutated[i]; \ yading@10: if (block[j]) \ yading@10: REFINE_BIT(j) \ yading@10: else if (run-- == 0) \ yading@10: break; \ yading@10: } yading@10: yading@10: /* decode block and dequantize - progressive JPEG refinement pass */ yading@10: static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block, yading@10: uint8_t *last_nnz, yading@10: int ac_index, int16_t *quant_matrix, yading@10: int ss, int se, int Al, int *EOBRUN) yading@10: { yading@10: int code, i = ss, j, sign, val, run; yading@10: int last = FFMIN(se, *last_nnz); yading@10: yading@10: OPEN_READER(re, &s->gb); yading@10: if (*EOBRUN) { yading@10: (*EOBRUN)--; yading@10: } else { yading@10: for (; ; i++) { yading@10: UPDATE_CACHE(re, &s->gb); yading@10: GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2); yading@10: yading@10: if (code & 0xF) { yading@10: run = ((unsigned) code) >> 4; yading@10: UPDATE_CACHE(re, &s->gb); yading@10: val = SHOW_UBITS(re, &s->gb, 1); yading@10: LAST_SKIP_BITS(re, &s->gb, 1); yading@10: ZERO_RUN; yading@10: j = s->scantable.permutated[i]; yading@10: val--; yading@10: block[j] = ((quant_matrix[j]^val) - val) << Al; yading@10: if (i == se) { yading@10: if (i > *last_nnz) yading@10: *last_nnz = i; yading@10: CLOSE_READER(re, &s->gb); yading@10: return 0; yading@10: } yading@10: } else { yading@10: run = ((unsigned) code) >> 4; yading@10: if (run == 0xF) { yading@10: ZERO_RUN; yading@10: } else { yading@10: val = run; yading@10: run = (1 << run); yading@10: if (val) { yading@10: UPDATE_CACHE(re, &s->gb); yading@10: run += SHOW_UBITS(re, &s->gb, val); yading@10: LAST_SKIP_BITS(re, &s->gb, val); yading@10: } yading@10: *EOBRUN = run - 1; yading@10: break; yading@10: } yading@10: } yading@10: } yading@10: yading@10: if (i > *last_nnz) yading@10: *last_nnz = i; yading@10: } yading@10: yading@10: for (; i <= last; i++) { yading@10: j = s->scantable.permutated[i]; yading@10: if (block[j]) yading@10: REFINE_BIT(j) yading@10: } yading@10: CLOSE_READER(re, &s->gb); yading@10: yading@10: return 0; yading@10: } yading@10: #undef REFINE_BIT yading@10: #undef ZERO_RUN yading@10: yading@10: static void handle_rstn(MJpegDecodeContext *s, int nb_components) yading@10: { yading@10: int i; yading@10: if (s->restart_interval) { yading@10: s->restart_count--; yading@10: if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){ yading@10: align_get_bits(&s->gb); yading@10: for (i = 0; i < nb_components; i++) /* reset dc */ yading@10: s->last_dc[i] = 1024; yading@10: } yading@10: yading@10: i = 8 + ((-get_bits_count(&s->gb)) & 7); yading@10: /* skip RSTn */ yading@10: if (s->restart_count == 0) { yading@10: if( show_bits(&s->gb, i) == (1 << i) - 1 yading@10: || show_bits(&s->gb, i) == 0xFF) { yading@10: int pos = get_bits_count(&s->gb); yading@10: align_get_bits(&s->gb); yading@10: while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF) yading@10: skip_bits(&s->gb, 8); yading@10: if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) { yading@10: for (i = 0; i < nb_components; i++) /* reset dc */ yading@10: s->last_dc[i] = 1024; yading@10: } else yading@10: skip_bits_long(&s->gb, pos - get_bits_count(&s->gb)); yading@10: } yading@10: } yading@10: } yading@10: } yading@10: yading@10: static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform) yading@10: { yading@10: int i, mb_x, mb_y; yading@10: uint16_t (*buffer)[4]; yading@10: int left[3], top[3], topleft[3]; yading@10: const int linesize = s->linesize[0]; yading@10: const int mask = (1 << s->bits) - 1; yading@10: int resync_mb_y = 0; yading@10: int resync_mb_x = 0; yading@10: yading@10: s->restart_count = s->restart_interval; yading@10: yading@10: av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size, yading@10: (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0])); yading@10: buffer = s->ljpeg_buffer; yading@10: yading@10: for (i = 0; i < 3; i++) yading@10: buffer[0][i] = 1 << (s->bits - 1); yading@10: yading@10: for (mb_y = 0; mb_y < s->mb_height; mb_y++) { yading@10: uint8_t *ptr = s->picture.data[0] + (linesize * mb_y); yading@10: yading@10: if (s->interlaced && s->bottom_field) yading@10: ptr += linesize >> 1; yading@10: yading@10: for (i = 0; i < 3; i++) yading@10: top[i] = left[i] = topleft[i] = buffer[0][i]; yading@10: yading@10: for (mb_x = 0; mb_x < s->mb_width; mb_x++) { yading@10: int modified_predictor = predictor; yading@10: yading@10: if (s->restart_interval && !s->restart_count){ yading@10: s->restart_count = s->restart_interval; yading@10: resync_mb_x = mb_x; yading@10: resync_mb_y = mb_y; yading@10: for(i=0; i<3; i++) yading@10: top[i] = left[i]= topleft[i]= 1 << (s->bits - 1); yading@10: } yading@10: if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x) yading@10: modified_predictor = 1; yading@10: yading@10: for (i=0;idc_index[i]); yading@10: if(dc == 0xFFFF) yading@10: return -1; yading@10: yading@10: left[i] = buffer[mb_x][i] = yading@10: mask & (pred + (dc << point_transform)); yading@10: } yading@10: yading@10: if (s->restart_interval && !--s->restart_count) { yading@10: align_get_bits(&s->gb); yading@10: skip_bits(&s->gb, 16); /* skip RSTn */ yading@10: } yading@10: } yading@10: yading@10: if (s->rct) { yading@10: for (mb_x = 0; mb_x < s->mb_width; mb_x++) { yading@10: ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2); yading@10: ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1]; yading@10: ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1]; yading@10: } yading@10: } else if (s->pegasus_rct) { yading@10: for (mb_x = 0; mb_x < s->mb_width; mb_x++) { yading@10: ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2); yading@10: ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1]; yading@10: ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1]; yading@10: } yading@10: } else { yading@10: for(i=0; icomp_index[i]; yading@10: for(mb_x = 0; mb_x < s->mb_width; mb_x++) { yading@10: ptr[3*mb_x+2-c] = buffer[mb_x][i]; yading@10: } yading@10: } yading@10: } yading@10: } yading@10: return 0; yading@10: } yading@10: yading@10: static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int nb_components, int predictor, yading@10: int point_transform) yading@10: { yading@10: int i, mb_x, mb_y; yading@10: int bits= (s->bits+7)&~7; yading@10: int resync_mb_y = 0; yading@10: int resync_mb_x = 0; yading@10: yading@10: point_transform += bits - s->bits; yading@10: yading@10: av_assert0(nb_components>=1 && nb_components<=3); yading@10: yading@10: for (mb_y = 0; mb_y < s->mb_height; mb_y++) { yading@10: for (mb_x = 0; mb_x < s->mb_width; mb_x++) { yading@10: if (s->restart_interval && !s->restart_count){ yading@10: s->restart_count = s->restart_interval; yading@10: resync_mb_x = mb_x; yading@10: resync_mb_y = mb_y; yading@10: } yading@10: yading@10: if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){ yading@10: int toprow = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x; yading@10: int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x; yading@10: for (i = 0; i < nb_components; i++) { yading@10: uint8_t *ptr; yading@10: uint16_t *ptr16; yading@10: int n, h, v, x, y, c, j, linesize; yading@10: n = s->nb_blocks[i]; yading@10: c = s->comp_index[i]; yading@10: h = s->h_scount[i]; yading@10: v = s->v_scount[i]; yading@10: x = 0; yading@10: y = 0; yading@10: linesize= s->linesize[c]; yading@10: yading@10: if(bits>8) linesize /= 2; yading@10: yading@10: for(j=0; jdc_index[i]); yading@10: if(dc == 0xFFFF) yading@10: return -1; yading@10: if(bits<=8){ yading@10: ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap yading@10: if(y==0 && toprow){ yading@10: if(x==0 && leftcol){ yading@10: pred= 1 << (bits - 1); yading@10: }else{ yading@10: pred= ptr[-1]; yading@10: } yading@10: }else{ yading@10: if(x==0 && leftcol){ yading@10: pred= ptr[-linesize]; yading@10: }else{ yading@10: PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor); yading@10: } yading@10: } yading@10: yading@10: if (s->interlaced && s->bottom_field) yading@10: ptr += linesize >> 1; yading@10: pred &= (-1)<<(8-s->bits); yading@10: *ptr= pred + (dc << point_transform); yading@10: }else{ yading@10: ptr16 = (uint16_t*)(s->picture.data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap yading@10: if(y==0 && toprow){ yading@10: if(x==0 && leftcol){ yading@10: pred= 1 << (bits - 1); yading@10: }else{ yading@10: pred= ptr16[-1]; yading@10: } yading@10: }else{ yading@10: if(x==0 && leftcol){ yading@10: pred= ptr16[-linesize]; yading@10: }else{ yading@10: PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor); yading@10: } yading@10: } yading@10: yading@10: if (s->interlaced && s->bottom_field) yading@10: ptr16 += linesize >> 1; yading@10: pred &= (-1)<<(16-s->bits); yading@10: *ptr16= pred + (dc << point_transform); yading@10: } yading@10: if (++x == h) { yading@10: x = 0; yading@10: y++; yading@10: } yading@10: } yading@10: } yading@10: } else { yading@10: for (i = 0; i < nb_components; i++) { yading@10: uint8_t *ptr; yading@10: uint16_t *ptr16; yading@10: int n, h, v, x, y, c, j, linesize, dc; yading@10: n = s->nb_blocks[i]; yading@10: c = s->comp_index[i]; yading@10: h = s->h_scount[i]; yading@10: v = s->v_scount[i]; yading@10: x = 0; yading@10: y = 0; yading@10: linesize = s->linesize[c]; yading@10: yading@10: if(bits>8) linesize /= 2; yading@10: yading@10: for (j = 0; j < n; j++) { yading@10: int pred; yading@10: yading@10: dc = mjpeg_decode_dc(s, s->dc_index[i]); yading@10: if(dc == 0xFFFF) yading@10: return -1; yading@10: if(bits<=8){ yading@10: ptr = s->picture.data[c] + yading@10: (linesize * (v * mb_y + y)) + yading@10: (h * mb_x + x); //FIXME optimize this crap yading@10: PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor); yading@10: yading@10: pred &= (-1)<<(8-s->bits); yading@10: *ptr = pred + (dc << point_transform); yading@10: }else{ yading@10: ptr16 = (uint16_t*)(s->picture.data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap yading@10: PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor); yading@10: yading@10: pred &= (-1)<<(16-s->bits); yading@10: *ptr16= pred + (dc << point_transform); yading@10: } yading@10: yading@10: if (++x == h) { yading@10: x = 0; yading@10: y++; yading@10: } yading@10: } yading@10: } yading@10: } yading@10: if (s->restart_interval && !--s->restart_count) { yading@10: align_get_bits(&s->gb); yading@10: skip_bits(&s->gb, 16); /* skip RSTn */ yading@10: } yading@10: } yading@10: } yading@10: return 0; yading@10: } yading@10: yading@10: static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s, yading@10: uint8_t *dst, const uint8_t *src, yading@10: int linesize, int lowres) yading@10: { yading@10: switch (lowres) { yading@10: case 0: s->hdsp.put_pixels_tab[1][0](dst, src, linesize, 8); yading@10: break; yading@10: case 1: copy_block4(dst, src, linesize, linesize, 4); yading@10: break; yading@10: case 2: copy_block2(dst, src, linesize, linesize, 2); yading@10: break; yading@10: case 3: *dst = *src; yading@10: break; yading@10: } yading@10: } yading@10: yading@10: static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah, yading@10: int Al, const uint8_t *mb_bitmask, yading@10: const AVFrame *reference) yading@10: { yading@10: int i, mb_x, mb_y; yading@10: uint8_t *data[MAX_COMPONENTS]; yading@10: const uint8_t *reference_data[MAX_COMPONENTS]; yading@10: int linesize[MAX_COMPONENTS]; yading@10: GetBitContext mb_bitmask_gb; yading@10: yading@10: if (mb_bitmask) yading@10: init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height); yading@10: yading@10: if (s->flipped && s->avctx->lowres) { yading@10: av_log(s->avctx, AV_LOG_ERROR, "Can not flip image with lowres\n"); yading@10: s->flipped = 0; yading@10: } yading@10: yading@10: for (i = 0; i < nb_components; i++) { yading@10: int c = s->comp_index[i]; yading@10: data[c] = s->picture_ptr->data[c]; yading@10: reference_data[c] = reference ? reference->data[c] : NULL; yading@10: linesize[c] = s->linesize[c]; yading@10: s->coefs_finished[c] |= 1; yading@10: if (s->flipped && !(s->avctx->flags & CODEC_FLAG_EMU_EDGE)) { yading@10: // picture should be flipped upside-down for this codec yading@10: int offset = (linesize[c] * (s->v_scount[i] * yading@10: (8 * s->mb_height - ((s->height / s->v_max) & 7)) - 1)); yading@10: data[c] += offset; yading@10: reference_data[c] += offset; yading@10: linesize[c] *= -1; yading@10: } yading@10: } yading@10: yading@10: for (mb_y = 0; mb_y < s->mb_height; mb_y++) { yading@10: for (mb_x = 0; mb_x < s->mb_width; mb_x++) { yading@10: const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb); yading@10: yading@10: if (s->restart_interval && !s->restart_count) yading@10: s->restart_count = s->restart_interval; yading@10: yading@10: if (get_bits_left(&s->gb) < 0) { yading@10: av_log(s->avctx, AV_LOG_ERROR, "overread %d\n", yading@10: -get_bits_left(&s->gb)); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: for (i = 0; i < nb_components; i++) { yading@10: uint8_t *ptr; yading@10: int n, h, v, x, y, c, j; yading@10: int block_offset; yading@10: n = s->nb_blocks[i]; yading@10: c = s->comp_index[i]; yading@10: h = s->h_scount[i]; yading@10: v = s->v_scount[i]; yading@10: x = 0; yading@10: y = 0; yading@10: for (j = 0; j < n; j++) { yading@10: block_offset = (((linesize[c] * (v * mb_y + y) * 8) + yading@10: (h * mb_x + x) * 8) >> s->avctx->lowres); yading@10: yading@10: if (s->interlaced && s->bottom_field) yading@10: block_offset += linesize[c] >> 1; yading@10: ptr = data[c] + block_offset; yading@10: if (!s->progressive) { yading@10: if (copy_mb) yading@10: mjpeg_copy_block(s, ptr, reference_data[c] + block_offset, yading@10: linesize[c], s->avctx->lowres); yading@10: yading@10: else { yading@10: s->dsp.clear_block(s->block); yading@10: if (decode_block(s, s->block, i, yading@10: s->dc_index[i], s->ac_index[i], yading@10: s->quant_matrixes[s->quant_index[c]]) < 0) { yading@10: av_log(s->avctx, AV_LOG_ERROR, yading@10: "error y=%d x=%d\n", mb_y, mb_x); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: s->dsp.idct_put(ptr, linesize[c], s->block); yading@10: } yading@10: } else { yading@10: int block_idx = s->block_stride[c] * (v * mb_y + y) + yading@10: (h * mb_x + x); yading@10: int16_t *block = s->blocks[c][block_idx]; yading@10: if (Ah) yading@10: block[0] += get_bits1(&s->gb) * yading@10: s->quant_matrixes[s->quant_index[c]][0] << Al; yading@10: else if (decode_dc_progressive(s, block, i, s->dc_index[i], yading@10: s->quant_matrixes[s->quant_index[c]], yading@10: Al) < 0) { yading@10: av_log(s->avctx, AV_LOG_ERROR, yading@10: "error y=%d x=%d\n", mb_y, mb_x); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: } yading@10: av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x); yading@10: av_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n", yading@10: mb_x, mb_y, x, y, c, s->bottom_field, yading@10: (v * mb_y + y) * 8, (h * mb_x + x) * 8); yading@10: if (++x == h) { yading@10: x = 0; yading@10: y++; yading@10: } yading@10: } yading@10: } yading@10: yading@10: handle_rstn(s, nb_components); yading@10: } yading@10: } yading@10: return 0; yading@10: } yading@10: yading@10: static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss, yading@10: int se, int Ah, int Al) yading@10: { yading@10: int mb_x, mb_y; yading@10: int EOBRUN = 0; yading@10: int c = s->comp_index[0]; yading@10: uint8_t *data = s->picture.data[c]; yading@10: int linesize = s->linesize[c]; yading@10: int last_scan = 0; yading@10: int16_t *quant_matrix = s->quant_matrixes[s->quant_index[c]]; yading@10: yading@10: if (se > 63) { yading@10: av_log(s->avctx, AV_LOG_ERROR, "SE %d is too large\n", se); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: yading@10: if (!Al) { yading@10: s->coefs_finished[c] |= (1LL << (se + 1)) - (1LL << ss); yading@10: last_scan = !~s->coefs_finished[c]; yading@10: } yading@10: yading@10: if (s->interlaced && s->bottom_field) yading@10: data += linesize >> 1; yading@10: yading@10: s->restart_count = 0; yading@10: yading@10: for (mb_y = 0; mb_y < s->mb_height; mb_y++) { yading@10: uint8_t *ptr = data + (mb_y * linesize * 8 >> s->avctx->lowres); yading@10: int block_idx = mb_y * s->block_stride[c]; yading@10: int16_t (*block)[64] = &s->blocks[c][block_idx]; yading@10: uint8_t *last_nnz = &s->last_nnz[c][block_idx]; yading@10: for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) { yading@10: int ret; yading@10: if (s->restart_interval && !s->restart_count) yading@10: s->restart_count = s->restart_interval; yading@10: yading@10: if (Ah) yading@10: ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0], yading@10: quant_matrix, ss, se, Al, &EOBRUN); yading@10: else yading@10: ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0], yading@10: quant_matrix, ss, se, Al, &EOBRUN); yading@10: if (ret < 0) { yading@10: av_log(s->avctx, AV_LOG_ERROR, yading@10: "error y=%d x=%d\n", mb_y, mb_x); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: yading@10: if (last_scan) { yading@10: s->dsp.idct_put(ptr, linesize, *block); yading@10: ptr += 8 >> s->avctx->lowres; yading@10: } yading@10: handle_rstn(s, 0); yading@10: } yading@10: } yading@10: return 0; yading@10: } yading@10: yading@10: int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask, yading@10: const AVFrame *reference) yading@10: { yading@10: int len, nb_components, i, h, v, predictor, point_transform; yading@10: int index, id, ret; yading@10: const int block_size = s->lossless ? 1 : 8; yading@10: int ilv, prev_shift; yading@10: yading@10: if (!s->got_picture) { yading@10: av_log(s->avctx, AV_LOG_WARNING, yading@10: "Can not process SOS before SOF, skipping\n"); yading@10: return -1; yading@10: } yading@10: yading@10: av_assert0(s->picture_ptr->data[0]); yading@10: /* XXX: verify len field validity */ yading@10: len = get_bits(&s->gb, 16); yading@10: nb_components = get_bits(&s->gb, 8); yading@10: if (nb_components == 0 || nb_components > MAX_COMPONENTS) { yading@10: av_log(s->avctx, AV_LOG_ERROR, yading@10: "decode_sos: nb_components (%d) unsupported\n", nb_components); yading@10: return AVERROR_PATCHWELCOME; yading@10: } yading@10: if (len != 6 + 2 * nb_components) { yading@10: av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: for (i = 0; i < nb_components; i++) { yading@10: id = get_bits(&s->gb, 8) - 1; yading@10: av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id); yading@10: /* find component index */ yading@10: for (index = 0; index < s->nb_components; index++) yading@10: if (id == s->component_id[index]) yading@10: break; yading@10: if (index == s->nb_components) { yading@10: av_log(s->avctx, AV_LOG_ERROR, yading@10: "decode_sos: index(%d) out of components\n", index); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: /* Metasoft MJPEG codec has Cb and Cr swapped */ yading@10: if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J') yading@10: && nb_components == 3 && s->nb_components == 3 && i) yading@10: index = 3 - i; yading@10: yading@10: if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P) yading@10: index = (i+2)%3; yading@10: if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P) yading@10: index = (index+2)%3; yading@10: yading@10: s->comp_index[i] = index; yading@10: yading@10: s->nb_blocks[i] = s->h_count[index] * s->v_count[index]; yading@10: s->h_scount[i] = s->h_count[index]; yading@10: s->v_scount[i] = s->v_count[index]; yading@10: yading@10: s->dc_index[i] = get_bits(&s->gb, 4); yading@10: s->ac_index[i] = get_bits(&s->gb, 4); yading@10: yading@10: if (s->dc_index[i] < 0 || s->ac_index[i] < 0 || yading@10: s->dc_index[i] >= 4 || s->ac_index[i] >= 4) yading@10: goto out_of_range; yading@10: 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)) yading@10: goto out_of_range; yading@10: } yading@10: yading@10: predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */ yading@10: ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */ yading@10: if(s->avctx->codec_tag != AV_RL32("CJPG")){ yading@10: prev_shift = get_bits(&s->gb, 4); /* Ah */ yading@10: point_transform = get_bits(&s->gb, 4); /* Al */ yading@10: }else yading@10: prev_shift = point_transform = 0; yading@10: yading@10: if (nb_components > 1) { yading@10: /* interleaved stream */ yading@10: s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size); yading@10: s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size); yading@10: } else if (!s->ls) { /* skip this for JPEG-LS */ yading@10: h = s->h_max / s->h_scount[0]; yading@10: v = s->v_max / s->v_scount[0]; yading@10: s->mb_width = (s->width + h * block_size - 1) / (h * block_size); yading@10: s->mb_height = (s->height + v * block_size - 1) / (v * block_size); yading@10: s->nb_blocks[0] = 1; yading@10: s->h_scount[0] = 1; yading@10: s->v_scount[0] = 1; yading@10: } yading@10: yading@10: if (s->avctx->debug & FF_DEBUG_PICT_INFO) yading@10: av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n", yading@10: s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "", yading@10: predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod, yading@10: s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components); yading@10: yading@10: yading@10: /* mjpeg-b can have padding bytes between sos and image data, skip them */ yading@10: for (i = s->mjpb_skiptosod; i > 0; i--) yading@10: skip_bits(&s->gb, 8); yading@10: yading@10: next_field: yading@10: for (i = 0; i < nb_components; i++) yading@10: s->last_dc[i] = 1024; yading@10: yading@10: if (s->lossless) { yading@10: av_assert0(s->picture_ptr == &s->picture); yading@10: if (CONFIG_JPEGLS_DECODER && s->ls) { yading@10: // for () { yading@10: // reset_ls_coding_parameters(s, 0); yading@10: yading@10: if ((ret = ff_jpegls_decode_picture(s, predictor, yading@10: point_transform, ilv)) < 0) yading@10: return ret; yading@10: } else { yading@10: if (s->rgb) { yading@10: if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0) yading@10: return ret; yading@10: } else { yading@10: if ((ret = ljpeg_decode_yuv_scan(s, nb_components, predictor, point_transform)) < 0) yading@10: return ret; yading@10: } yading@10: } yading@10: } else { yading@10: if (s->progressive && predictor) { yading@10: av_assert0(s->picture_ptr == &s->picture); yading@10: if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor, yading@10: ilv, prev_shift, yading@10: point_transform)) < 0) yading@10: return ret; yading@10: } else { yading@10: if ((ret = mjpeg_decode_scan(s, nb_components, yading@10: prev_shift, point_transform, yading@10: mb_bitmask, reference)) < 0) yading@10: return ret; yading@10: } yading@10: } yading@10: yading@10: if (s->interlaced && yading@10: get_bits_left(&s->gb) > 32 && yading@10: show_bits(&s->gb, 8) == 0xFF) { yading@10: GetBitContext bak = s->gb; yading@10: align_get_bits(&bak); yading@10: if (show_bits(&bak, 16) == 0xFFD1) { yading@10: av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n"); yading@10: s->gb = bak; yading@10: skip_bits(&s->gb, 16); yading@10: s->bottom_field ^= 1; yading@10: yading@10: goto next_field; yading@10: } yading@10: } yading@10: yading@10: emms_c(); yading@10: return 0; yading@10: out_of_range: yading@10: av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: yading@10: static int mjpeg_decode_dri(MJpegDecodeContext *s) yading@10: { yading@10: if (get_bits(&s->gb, 16) != 4) yading@10: return AVERROR_INVALIDDATA; yading@10: s->restart_interval = get_bits(&s->gb, 16); yading@10: s->restart_count = 0; yading@10: av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n", yading@10: s->restart_interval); yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: static int mjpeg_decode_app(MJpegDecodeContext *s) yading@10: { yading@10: int len, id, i; yading@10: yading@10: len = get_bits(&s->gb, 16); yading@10: if (len < 5) yading@10: return AVERROR_INVALIDDATA; yading@10: if (8 * len > get_bits_left(&s->gb)) yading@10: return AVERROR_INVALIDDATA; yading@10: yading@10: id = get_bits_long(&s->gb, 32); yading@10: len -= 6; yading@10: yading@10: if (s->avctx->debug & FF_DEBUG_STARTCODE) yading@10: av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id); yading@10: yading@10: /* Buggy AVID, it puts EOI only at every 10th frame. */ yading@10: /* Also, this fourcc is used by non-avid files too, it holds some yading@10: information, but it's always present in AVID-created files. */ yading@10: if (id == AV_RB32("AVI1")) { yading@10: /* structure: yading@10: 4bytes AVI1 yading@10: 1bytes polarity yading@10: 1bytes always zero yading@10: 4bytes field_size yading@10: 4bytes field_size_less_padding yading@10: */ yading@10: s->buggy_avid = 1; yading@10: i = get_bits(&s->gb, 8); len--; yading@10: av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i); yading@10: #if 0 yading@10: skip_bits(&s->gb, 8); yading@10: skip_bits(&s->gb, 32); yading@10: skip_bits(&s->gb, 32); yading@10: len -= 10; yading@10: #endif yading@10: goto out; yading@10: } yading@10: yading@10: // len -= 2; yading@10: yading@10: if (id == AV_RB32("JFIF")) { yading@10: int t_w, t_h, v1, v2; yading@10: skip_bits(&s->gb, 8); /* the trailing zero-byte */ yading@10: v1 = get_bits(&s->gb, 8); yading@10: v2 = get_bits(&s->gb, 8); yading@10: skip_bits(&s->gb, 8); yading@10: yading@10: s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16); yading@10: s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16); yading@10: yading@10: if (s->avctx->debug & FF_DEBUG_PICT_INFO) yading@10: av_log(s->avctx, AV_LOG_INFO, yading@10: "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n", yading@10: v1, v2, yading@10: s->avctx->sample_aspect_ratio.num, yading@10: s->avctx->sample_aspect_ratio.den); yading@10: yading@10: t_w = get_bits(&s->gb, 8); yading@10: t_h = get_bits(&s->gb, 8); yading@10: if (t_w && t_h) { yading@10: /* skip thumbnail */ yading@10: if (len -10 - (t_w * t_h * 3) > 0) yading@10: len -= t_w * t_h * 3; yading@10: } yading@10: len -= 10; yading@10: goto out; yading@10: } yading@10: yading@10: if (id == AV_RB32("Adob") && (get_bits(&s->gb, 8) == 'e')) { yading@10: if (s->avctx->debug & FF_DEBUG_PICT_INFO) yading@10: av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n"); yading@10: skip_bits(&s->gb, 16); /* version */ yading@10: skip_bits(&s->gb, 16); /* flags0 */ yading@10: skip_bits(&s->gb, 16); /* flags1 */ yading@10: skip_bits(&s->gb, 8); /* transform */ yading@10: len -= 7; yading@10: goto out; yading@10: } yading@10: yading@10: if (id == AV_RB32("LJIF")) { yading@10: if (s->avctx->debug & FF_DEBUG_PICT_INFO) yading@10: av_log(s->avctx, AV_LOG_INFO, yading@10: "Pegasus lossless jpeg header found\n"); yading@10: skip_bits(&s->gb, 16); /* version ? */ yading@10: skip_bits(&s->gb, 16); /* unknown always 0? */ yading@10: skip_bits(&s->gb, 16); /* unknown always 0? */ yading@10: skip_bits(&s->gb, 16); /* unknown always 0? */ yading@10: switch (get_bits(&s->gb, 8)) { yading@10: case 1: yading@10: s->rgb = 1; yading@10: s->pegasus_rct = 0; yading@10: break; yading@10: case 2: yading@10: s->rgb = 1; yading@10: s->pegasus_rct = 1; yading@10: break; yading@10: default: yading@10: av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n"); yading@10: } yading@10: len -= 9; yading@10: goto out; yading@10: } yading@10: yading@10: /* Apple MJPEG-A */ yading@10: if ((s->start_code == APP1) && (len > (0x28 - 8))) { yading@10: id = get_bits_long(&s->gb, 32); yading@10: len -= 4; yading@10: /* Apple MJPEG-A */ yading@10: if (id == AV_RB32("mjpg")) { yading@10: #if 0 yading@10: skip_bits(&s->gb, 32); /* field size */ yading@10: skip_bits(&s->gb, 32); /* pad field size */ yading@10: skip_bits(&s->gb, 32); /* next off */ yading@10: skip_bits(&s->gb, 32); /* quant off */ yading@10: skip_bits(&s->gb, 32); /* huff off */ yading@10: skip_bits(&s->gb, 32); /* image off */ yading@10: skip_bits(&s->gb, 32); /* scan off */ yading@10: skip_bits(&s->gb, 32); /* data off */ yading@10: #endif yading@10: if (s->avctx->debug & FF_DEBUG_PICT_INFO) yading@10: av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n"); yading@10: } yading@10: } yading@10: yading@10: out: yading@10: /* slow but needed for extreme adobe jpegs */ yading@10: if (len < 0) yading@10: av_log(s->avctx, AV_LOG_ERROR, yading@10: "mjpeg: error, decode_app parser read over the end\n"); yading@10: while (--len > 0) yading@10: skip_bits(&s->gb, 8); yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: static int mjpeg_decode_com(MJpegDecodeContext *s) yading@10: { yading@10: int len = get_bits(&s->gb, 16); yading@10: if (len >= 2 && 8 * len - 16 <= get_bits_left(&s->gb)) { yading@10: char *cbuf = av_malloc(len - 1); yading@10: if (cbuf) { yading@10: int i; yading@10: for (i = 0; i < len - 2; i++) yading@10: cbuf[i] = get_bits(&s->gb, 8); yading@10: if (i > 0 && cbuf[i - 1] == '\n') yading@10: cbuf[i - 1] = 0; yading@10: else yading@10: cbuf[i] = 0; yading@10: yading@10: if (s->avctx->debug & FF_DEBUG_PICT_INFO) yading@10: av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf); yading@10: yading@10: /* buggy avid, it puts EOI only at every 10th frame */ yading@10: if (!strcmp(cbuf, "AVID")) { yading@10: s->buggy_avid = 1; yading@10: } else if (!strcmp(cbuf, "CS=ITU601")) yading@10: s->cs_itu601 = 1; yading@10: else if ((len > 31 && !strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32)) || yading@10: (len > 19 && !strncmp(cbuf, "Metasoft MJPEG Codec", 20))) yading@10: s->flipped = 1; yading@10: yading@10: av_free(cbuf); yading@10: } yading@10: } yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: /* return the 8 bit start code value and update the search yading@10: state. Return -1 if no start code found */ yading@10: static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end) yading@10: { yading@10: const uint8_t *buf_ptr; yading@10: unsigned int v, v2; yading@10: int val; yading@10: int skipped = 0; yading@10: yading@10: buf_ptr = *pbuf_ptr; yading@10: while (buf_ptr < buf_end) { yading@10: v = *buf_ptr++; yading@10: v2 = *buf_ptr; yading@10: if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) { yading@10: val = *buf_ptr++; yading@10: goto found; yading@10: } yading@10: skipped++; yading@10: } yading@10: val = -1; yading@10: found: yading@10: av_dlog(NULL, "find_marker skipped %d bytes\n", skipped); yading@10: *pbuf_ptr = buf_ptr; yading@10: return val; yading@10: } yading@10: yading@10: int ff_mjpeg_find_marker(MJpegDecodeContext *s, yading@10: const uint8_t **buf_ptr, const uint8_t *buf_end, yading@10: const uint8_t **unescaped_buf_ptr, yading@10: int *unescaped_buf_size) yading@10: { yading@10: int start_code; yading@10: start_code = find_marker(buf_ptr, buf_end); yading@10: yading@10: av_fast_padded_malloc(&s->buffer, &s->buffer_size, buf_end - *buf_ptr); yading@10: if (!s->buffer) yading@10: return AVERROR(ENOMEM); yading@10: yading@10: /* unescape buffer of SOS, use special treatment for JPEG-LS */ yading@10: if (start_code == SOS && !s->ls) { yading@10: const uint8_t *src = *buf_ptr; yading@10: uint8_t *dst = s->buffer; yading@10: yading@10: while (src < buf_end) { yading@10: uint8_t x = *(src++); yading@10: yading@10: *(dst++) = x; yading@10: if (s->avctx->codec_id != AV_CODEC_ID_THP) { yading@10: if (x == 0xff) { yading@10: while (src < buf_end && x == 0xff) yading@10: x = *(src++); yading@10: yading@10: if (x >= 0xd0 && x <= 0xd7) yading@10: *(dst++) = x; yading@10: else if (x) yading@10: break; yading@10: } yading@10: } yading@10: } yading@10: *unescaped_buf_ptr = s->buffer; yading@10: *unescaped_buf_size = dst - s->buffer; yading@10: memset(s->buffer + *unescaped_buf_size, 0, yading@10: FF_INPUT_BUFFER_PADDING_SIZE); yading@10: yading@10: av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n", yading@10: (buf_end - *buf_ptr) - (dst - s->buffer)); yading@10: } else if (start_code == SOS && s->ls) { yading@10: const uint8_t *src = *buf_ptr; yading@10: uint8_t *dst = s->buffer; yading@10: int bit_count = 0; yading@10: int t = 0, b = 0; yading@10: PutBitContext pb; yading@10: yading@10: s->cur_scan++; yading@10: yading@10: /* find marker */ yading@10: while (src + t < buf_end) { yading@10: uint8_t x = src[t++]; yading@10: if (x == 0xff) { yading@10: while ((src + t < buf_end) && x == 0xff) yading@10: x = src[t++]; yading@10: if (x & 0x80) { yading@10: t -= FFMIN(2, t); yading@10: break; yading@10: } yading@10: } yading@10: } yading@10: bit_count = t * 8; yading@10: init_put_bits(&pb, dst, t); yading@10: yading@10: /* unescape bitstream */ yading@10: while (b < t) { yading@10: uint8_t x = src[b++]; yading@10: put_bits(&pb, 8, x); yading@10: if (x == 0xFF) { yading@10: x = src[b++]; yading@10: put_bits(&pb, 7, x); yading@10: bit_count--; yading@10: } yading@10: } yading@10: flush_put_bits(&pb); yading@10: yading@10: *unescaped_buf_ptr = dst; yading@10: *unescaped_buf_size = (bit_count + 7) >> 3; yading@10: memset(s->buffer + *unescaped_buf_size, 0, yading@10: FF_INPUT_BUFFER_PADDING_SIZE); yading@10: } else { yading@10: *unescaped_buf_ptr = *buf_ptr; yading@10: *unescaped_buf_size = buf_end - *buf_ptr; yading@10: } yading@10: yading@10: return start_code; yading@10: } yading@10: yading@10: int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, yading@10: AVPacket *avpkt) yading@10: { yading@10: const uint8_t *buf = avpkt->data; yading@10: int buf_size = avpkt->size; yading@10: MJpegDecodeContext *s = avctx->priv_data; yading@10: const uint8_t *buf_end, *buf_ptr; yading@10: const uint8_t *unescaped_buf_ptr; yading@10: int hshift, vshift; yading@10: int unescaped_buf_size; yading@10: int start_code; yading@10: int i, index; yading@10: int ret = 0; yading@10: yading@10: buf_ptr = buf; yading@10: buf_end = buf + buf_size; yading@10: while (buf_ptr < buf_end) { yading@10: /* find start next marker */ yading@10: start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end, yading@10: &unescaped_buf_ptr, yading@10: &unescaped_buf_size); yading@10: /* EOF */ yading@10: if (start_code < 0) { yading@10: goto the_end; yading@10: } else if (unescaped_buf_size > (1U<<28)) { yading@10: av_log(avctx, AV_LOG_ERROR, "MJPEG packet 0x%x too big (0x%x/0x%x), corrupt data?\n", yading@10: start_code, unescaped_buf_size, buf_size); yading@10: return AVERROR_INVALIDDATA; yading@10: } else { yading@10: av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n", yading@10: start_code, buf_end - buf_ptr); yading@10: if ((ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size)) < 0) { yading@10: av_log(avctx, AV_LOG_ERROR, "invalid buffer\n"); yading@10: goto fail; yading@10: } yading@10: yading@10: s->start_code = start_code; yading@10: if (s->avctx->debug & FF_DEBUG_STARTCODE) yading@10: av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code); yading@10: yading@10: /* process markers */ yading@10: if (start_code >= 0xd0 && start_code <= 0xd7) yading@10: av_log(avctx, AV_LOG_DEBUG, yading@10: "restart marker: %d\n", start_code & 0x0f); yading@10: /* APP fields */ yading@10: else if (start_code >= APP0 && start_code <= APP15) yading@10: mjpeg_decode_app(s); yading@10: /* Comment */ yading@10: else if (start_code == COM) yading@10: mjpeg_decode_com(s); yading@10: yading@10: ret = -1; yading@10: switch (start_code) { yading@10: case SOI: yading@10: s->restart_interval = 0; yading@10: s->restart_count = 0; yading@10: /* nothing to do on SOI */ yading@10: break; yading@10: case DQT: yading@10: ff_mjpeg_decode_dqt(s); yading@10: break; yading@10: case DHT: yading@10: if ((ret = ff_mjpeg_decode_dht(s)) < 0) { yading@10: av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n"); yading@10: goto fail; yading@10: } yading@10: break; yading@10: case SOF0: yading@10: case SOF1: yading@10: s->lossless = 0; yading@10: s->ls = 0; yading@10: s->progressive = 0; yading@10: if ((ret = ff_mjpeg_decode_sof(s)) < 0) yading@10: goto fail; yading@10: break; yading@10: case SOF2: yading@10: s->lossless = 0; yading@10: s->ls = 0; yading@10: s->progressive = 1; yading@10: if ((ret = ff_mjpeg_decode_sof(s)) < 0) yading@10: goto fail; yading@10: break; yading@10: case SOF3: yading@10: s->lossless = 1; yading@10: s->ls = 0; yading@10: s->progressive = 0; yading@10: if ((ret = ff_mjpeg_decode_sof(s)) < 0) yading@10: goto fail; yading@10: break; yading@10: case SOF48: yading@10: s->lossless = 1; yading@10: s->ls = 1; yading@10: s->progressive = 0; yading@10: if ((ret = ff_mjpeg_decode_sof(s)) < 0) yading@10: goto fail; yading@10: break; yading@10: case LSE: yading@10: if (!CONFIG_JPEGLS_DECODER || yading@10: (ret = ff_jpegls_decode_lse(s)) < 0) yading@10: goto fail; yading@10: break; yading@10: case EOI: yading@10: eoi_parser: yading@10: s->cur_scan = 0; yading@10: if (!s->got_picture) { yading@10: av_log(avctx, AV_LOG_WARNING, yading@10: "Found EOI before any SOF, ignoring\n"); yading@10: break; yading@10: } yading@10: if (s->interlaced) { yading@10: s->bottom_field ^= 1; yading@10: /* if not bottom field, do not output image yet */ yading@10: if (s->bottom_field == !s->interlace_polarity) yading@10: break; yading@10: } yading@10: if ((ret = av_frame_ref(data, s->picture_ptr)) < 0) yading@10: return ret; yading@10: *got_frame = 1; yading@10: s->got_picture = 0; yading@10: yading@10: if (!s->lossless) { yading@10: int qp = FFMAX3(s->qscale[0], yading@10: s->qscale[1], yading@10: s->qscale[2]); yading@10: int qpw = (s->width + 15) / 16; yading@10: AVBufferRef *qp_table_buf = av_buffer_alloc(qpw); yading@10: if (qp_table_buf) { yading@10: memset(qp_table_buf->data, qp, qpw); yading@10: av_frame_set_qp_table(data, qp_table_buf, 0, FF_QSCALE_TYPE_MPEG1); yading@10: } yading@10: yading@10: if(avctx->debug & FF_DEBUG_QP) yading@10: av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", qp); yading@10: } yading@10: yading@10: goto the_end; yading@10: case SOS: yading@10: if ((ret = ff_mjpeg_decode_sos(s, NULL, NULL)) < 0 && yading@10: (avctx->err_recognition & AV_EF_EXPLODE)) yading@10: goto fail; yading@10: break; yading@10: case DRI: yading@10: mjpeg_decode_dri(s); yading@10: break; yading@10: case SOF5: yading@10: case SOF6: yading@10: case SOF7: yading@10: case SOF9: yading@10: case SOF10: yading@10: case SOF11: yading@10: case SOF13: yading@10: case SOF14: yading@10: case SOF15: yading@10: case JPG: yading@10: av_log(avctx, AV_LOG_ERROR, yading@10: "mjpeg: unsupported coding type (%x)\n", start_code); yading@10: break; yading@10: } yading@10: yading@10: /* eof process start code */ yading@10: buf_ptr += (get_bits_count(&s->gb) + 7) / 8; yading@10: av_log(avctx, AV_LOG_DEBUG, yading@10: "marker parser used %d bytes (%d bits)\n", yading@10: (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb)); yading@10: } yading@10: } yading@10: if (s->got_picture) { yading@10: av_log(avctx, AV_LOG_WARNING, "EOI missing, emulating\n"); yading@10: goto eoi_parser; yading@10: } yading@10: av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: fail: yading@10: s->got_picture = 0; yading@10: return ret; yading@10: the_end: yading@10: if (s->upscale_h) { yading@10: uint8_t *line = s->picture_ptr->data[s->upscale_h]; yading@10: av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P || yading@10: avctx->pix_fmt == AV_PIX_FMT_YUV444P || yading@10: avctx->pix_fmt == AV_PIX_FMT_YUVJ440P || yading@10: avctx->pix_fmt == AV_PIX_FMT_YUV440P); yading@10: for (i = 0; i < s->chroma_height; i++) { yading@10: for (index = s->width - 1; index; index--) yading@10: line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1; yading@10: line += s->linesize[s->upscale_h]; yading@10: } yading@10: } yading@10: if (s->upscale_v) { yading@10: uint8_t *dst = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(s->height - 1) * s->linesize[s->upscale_v]]; yading@10: int w; yading@10: avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift); yading@10: w = s->width >> hshift; yading@10: av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P || yading@10: avctx->pix_fmt == AV_PIX_FMT_YUV444P || yading@10: avctx->pix_fmt == AV_PIX_FMT_YUVJ422P || yading@10: avctx->pix_fmt == AV_PIX_FMT_YUV422P); yading@10: for (i = s->height - 1; i; i--) { yading@10: uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[i / 2 * s->linesize[s->upscale_v]]; yading@10: uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(i + 1) / 2 * s->linesize[s->upscale_v]]; yading@10: if (src1 == src2) { yading@10: memcpy(dst, src1, w); yading@10: } else { yading@10: for (index = 0; index < w; index++) yading@10: dst[index] = (src1[index] + src2[index]) >> 1; yading@10: } yading@10: dst -= s->linesize[s->upscale_v]; yading@10: } yading@10: } yading@10: if (s->flipped && (s->avctx->flags & CODEC_FLAG_EMU_EDGE)) { yading@10: int j; yading@10: avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift); yading@10: for (index=0; index<4; index++) { yading@10: uint8_t *dst = s->picture_ptr->data[index]; yading@10: int w = s->width; yading@10: int h = s->height; yading@10: if(index && index<3){ yading@10: w = -((-w) >> hshift); yading@10: h = -((-h) >> vshift); yading@10: } yading@10: if(dst){ yading@10: uint8_t *dst2 = dst + s->linesize[index]*(h-1); yading@10: for (i=0; ilinesize[index]; yading@10: dst2 -= s->linesize[index]; yading@10: } yading@10: } yading@10: } yading@10: } yading@10: yading@10: av_log(avctx, AV_LOG_DEBUG, "decode frame unused %td bytes\n", yading@10: buf_end - buf_ptr); yading@10: // return buf_end - buf_ptr; yading@10: return buf_ptr - buf; yading@10: } yading@10: yading@10: av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx) yading@10: { yading@10: MJpegDecodeContext *s = avctx->priv_data; yading@10: int i, j; yading@10: yading@10: if (s->picture_ptr) yading@10: av_frame_unref(s->picture_ptr); yading@10: yading@10: av_free(s->buffer); yading@10: av_freep(&s->ljpeg_buffer); yading@10: s->ljpeg_buffer_size = 0; yading@10: yading@10: for (i = 0; i < 3; i++) { yading@10: for (j = 0; j < 4; j++) yading@10: ff_free_vlc(&s->vlcs[i][j]); yading@10: } yading@10: for (i = 0; i < MAX_COMPONENTS; i++) { yading@10: av_freep(&s->blocks[i]); yading@10: av_freep(&s->last_nnz[i]); yading@10: } yading@10: return 0; yading@10: } yading@10: yading@10: static void decode_flush(AVCodecContext *avctx) yading@10: { yading@10: MJpegDecodeContext *s = avctx->priv_data; yading@10: s->got_picture = 0; yading@10: } yading@10: yading@10: #if CONFIG_MJPEG_DECODER yading@10: #define OFFSET(x) offsetof(MJpegDecodeContext, x) yading@10: #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM yading@10: static const AVOption options[] = { yading@10: { "extern_huff", "Use external huffman table.", yading@10: OFFSET(extern_huff), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD }, yading@10: { NULL }, yading@10: }; yading@10: yading@10: static const AVClass mjpegdec_class = { yading@10: .class_name = "MJPEG decoder", yading@10: .item_name = av_default_item_name, yading@10: .option = options, yading@10: .version = LIBAVUTIL_VERSION_INT, yading@10: }; yading@10: yading@10: AVCodec ff_mjpeg_decoder = { yading@10: .name = "mjpeg", yading@10: .type = AVMEDIA_TYPE_VIDEO, yading@10: .id = AV_CODEC_ID_MJPEG, yading@10: .priv_data_size = sizeof(MJpegDecodeContext), yading@10: .init = ff_mjpeg_decode_init, yading@10: .close = ff_mjpeg_decode_end, yading@10: .decode = ff_mjpeg_decode_frame, yading@10: .flush = decode_flush, yading@10: .capabilities = CODEC_CAP_DR1, yading@10: .max_lowres = 3, yading@10: .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"), yading@10: .priv_class = &mjpegdec_class, yading@10: }; yading@10: #endif yading@10: #if CONFIG_THP_DECODER yading@10: AVCodec ff_thp_decoder = { yading@10: .name = "thp", yading@10: .type = AVMEDIA_TYPE_VIDEO, yading@10: .id = AV_CODEC_ID_THP, yading@10: .priv_data_size = sizeof(MJpegDecodeContext), yading@10: .init = ff_mjpeg_decode_init, yading@10: .close = ff_mjpeg_decode_end, yading@10: .decode = ff_mjpeg_decode_frame, yading@10: .flush = decode_flush, yading@10: .capabilities = CODEC_CAP_DR1, yading@10: .max_lowres = 3, yading@10: .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"), yading@10: }; yading@10: #endif