From 8992cb1d0d07edc33d274f6d7924ecdf6f83d994 Mon Sep 17 00:00:00 2001 From: Tim Redfern Date: Thu, 5 Sep 2013 17:57:22 +0100 Subject: making act segmenter --- ffmpeg/libavcodec/mjpegdec.c | 1935 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1935 insertions(+) create mode 100644 ffmpeg/libavcodec/mjpegdec.c (limited to 'ffmpeg/libavcodec/mjpegdec.c') diff --git a/ffmpeg/libavcodec/mjpegdec.c b/ffmpeg/libavcodec/mjpegdec.c new file mode 100644 index 0000000..5880fec --- /dev/null +++ b/ffmpeg/libavcodec/mjpegdec.c @@ -0,0 +1,1935 @@ +/* + * 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" + + +static int build_vlc(VLC *vlc, const uint8_t *bits_table, + const uint8_t *val_table, int nb_codes, + int use_static, int is_ac) +{ + uint8_t huff_size[256] = { 0 }; + uint16_t huff_code[256]; + uint16_t huff_sym[256]; + int i; + + av_assert0(nb_codes <= 256); + + ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table); + + for (i = 0; i < 256; i++) + huff_sym[i] = i + 16 * is_ac; + + if (is_ac) + huff_sym[0] = 16 * 256; + + return ff_init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1, + huff_code, 2, 2, huff_sym, 2, 2, use_static); +} + +static void build_basic_mjpeg_vlc(MJpegDecodeContext *s) +{ + build_vlc(&s->vlcs[0][0], avpriv_mjpeg_bits_dc_luminance, + avpriv_mjpeg_val_dc, 12, 0, 0); + build_vlc(&s->vlcs[0][1], avpriv_mjpeg_bits_dc_chrominance, + avpriv_mjpeg_val_dc, 12, 0, 0); + build_vlc(&s->vlcs[1][0], avpriv_mjpeg_bits_ac_luminance, + avpriv_mjpeg_val_ac_luminance, 251, 0, 1); + build_vlc(&s->vlcs[1][1], avpriv_mjpeg_bits_ac_chrominance, + avpriv_mjpeg_val_ac_chrominance, 251, 0, 1); + build_vlc(&s->vlcs[2][0], avpriv_mjpeg_bits_ac_luminance, + avpriv_mjpeg_val_ac_luminance, 251, 0, 0); + build_vlc(&s->vlcs[2][1], avpriv_mjpeg_bits_ac_chrominance, + avpriv_mjpeg_val_ac_chrominance, 251, 0, 0); +} + +av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx) +{ + MJpegDecodeContext *s = avctx->priv_data; + + if (!s->picture_ptr) + s->picture_ptr = &s->picture; + avcodec_get_frame_defaults(&s->picture); + + s->avctx = avctx; + ff_hpeldsp_init(&s->hdsp, avctx->flags); + ff_dsputil_init(&s->dsp, avctx); + ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct); + s->buffer_size = 0; + s->buffer = NULL; + s->start_code = -1; + s->first_picture = 1; + s->got_picture = 0; + s->org_height = avctx->coded_height; + avctx->chroma_sample_location = AVCHROMA_LOC_CENTER; + + build_basic_mjpeg_vlc(s); + + if (s->extern_huff) { + av_log(avctx, AV_LOG_INFO, "using external huffman table\n"); + init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8); + if (ff_mjpeg_decode_dht(s)) { + av_log(avctx, AV_LOG_ERROR, + "error using external huffman table, switching back to internal\n"); + build_basic_mjpeg_vlc(s); + } + } + if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */ + s->interlace_polarity = 1; /* bottom field first */ + av_log(avctx, AV_LOG_DEBUG, "bottom field first\n"); + } + if (avctx->codec->id == AV_CODEC_ID_AMV) + s->flipped = 1; + + return 0; +} + + +/* quantize tables */ +int ff_mjpeg_decode_dqt(MJpegDecodeContext *s) +{ + int len, index, i, j; + + len = get_bits(&s->gb, 16) - 2; + + while (len >= 65) { + int pr = get_bits(&s->gb, 4); + if (pr > 1) { + av_log(s->avctx, AV_LOG_ERROR, "dqt: invalid precision\n"); + return AVERROR_INVALIDDATA; + } + index = get_bits(&s->gb, 4); + if (index >= 4) + return -1; + av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index); + /* read quant table */ + for (i = 0; i < 64; i++) { + j = s->scantable.permutated[i]; + s->quant_matrixes[index][j] = get_bits(&s->gb, pr ? 16 : 8); + } + + // XXX FIXME finetune, and perhaps add dc too + s->qscale[index] = FFMAX(s->quant_matrixes[index][s->scantable.permutated[1]], + s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1; + av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n", + index, s->qscale[index]); + len -= 65; + } + return 0; +} + +/* decode huffman tables and build VLC decoders */ +int ff_mjpeg_decode_dht(MJpegDecodeContext *s) +{ + int len, index, i, class, n, v, code_max; + uint8_t bits_table[17]; + uint8_t val_table[256]; + int ret = 0; + + len = get_bits(&s->gb, 16) - 2; + + while (len > 0) { + if (len < 17) + return AVERROR_INVALIDDATA; + class = get_bits(&s->gb, 4); + if (class >= 2) + return AVERROR_INVALIDDATA; + index = get_bits(&s->gb, 4); + if (index >= 4) + return AVERROR_INVALIDDATA; + n = 0; + for (i = 1; i <= 16; i++) { + bits_table[i] = get_bits(&s->gb, 8); + n += bits_table[i]; + } + len -= 17; + if (len < n || n > 256) + return AVERROR_INVALIDDATA; + + code_max = 0; + for (i = 0; i < n; i++) { + v = get_bits(&s->gb, 8); + if (v > code_max) + code_max = v; + val_table[i] = v; + } + len -= n; + + /* build VLC and flush previous vlc if present */ + ff_free_vlc(&s->vlcs[class][index]); + av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n", + class, index, code_max + 1); + if ((ret = build_vlc(&s->vlcs[class][index], bits_table, val_table, + code_max + 1, 0, class > 0)) < 0) + return ret; + + if (class > 0) { + ff_free_vlc(&s->vlcs[2][index]); + if ((ret = build_vlc(&s->vlcs[2][index], bits_table, val_table, + code_max + 1, 0, 0)) < 0) + return ret; + } + } + return 0; +} + +int ff_mjpeg_decode_sof(MJpegDecodeContext *s) +{ + int len, nb_components, i, width, height, pix_fmt_id; + int h_count[MAX_COMPONENTS]; + int v_count[MAX_COMPONENTS]; + + s->cur_scan = 0; + s->upscale_h = s->upscale_v = 0; + + /* XXX: verify len field validity */ + len = get_bits(&s->gb, 16); + s->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->bits != 8 && !s->lossless) { + av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\n"); + return -1; + } + + 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]; + if (!h_count[i] || !v_count[i]) { + av_log(s->avctx, AV_LOG_ERROR, "h/v_count is 0\n"); + return -1; + } + 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; + } + av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n", + i, h_count[i], v_count[i], + s->component_id[i], s->quant_index[i]); + } + + if (s->ls && (s->h_max > 1 || s->v_max > 1)) { + avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS"); + return AVERROR_PATCHWELCOME; + } + + + /* if different size, realloc/alloc picture */ + if ( width != s->width || height != s->height + || memcmp(s->h_count, h_count, sizeof(h_count)) + || memcmp(s->v_count, v_count, sizeof(v_count))) { + + s->width = width; + s->height = height; + memcpy(s->h_count, h_count, sizeof(h_count)); + memcpy(s->v_count, v_count, sizeof(v_count)); + s->interlaced = 0; + s->got_picture = 0; + + /* test interlaced mode */ + if (s->first_picture && + s->org_height != 0 && + s->height < ((s->org_height * 3) / 4)) { + s->interlaced = 1; + s->bottom_field = s->interlace_polarity; + s->picture_ptr->interlaced_frame = 1; + s->picture_ptr->top_field_first = !s->interlace_polarity; + height *= 2; + } + + avcodec_set_dimensions(s->avctx, width, height); + + s->first_picture = 0; + } + + if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) { + if (s->progressive) { + avpriv_request_sample(s->avctx, "progressively coded interlaced picture"); + return AVERROR_INVALIDDATA; + } + } else{ + if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && nb_components==3) + 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 = AV_PIX_FMT_BGR24; + else { + if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') { + s->avctx->pix_fmt = AV_PIX_FMT_GBR24P; + } else { + s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P; + s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG; + } + } + av_assert0(s->nb_components == 3); + break; + case 0x12121100: + case 0x22122100: + s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P; + s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG; + s->upscale_v = 2; + s->upscale_h = (pix_fmt_id == 0x22122100); + s->chroma_height = s->height; + break; + case 0x21211100: + case 0x22211200: + s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P; + s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG; + s->upscale_v = (pix_fmt_id == 0x22211200); + s->upscale_h = 2; + s->chroma_height = s->height; + break; + case 0x22221100: + s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P; + s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG; + s->upscale_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: + s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P; + 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: + s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P; + s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG; + break; + case 0x22121100: + case 0x22111200: + s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P; + s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG; + s->upscale_v = (pix_fmt_id == 0x22121100) + 1; + break; + case 0x22111100: + s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P; + s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG; + break; + default: + av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id); + return AVERROR_PATCHWELCOME; + } + if ((s->upscale_h || s->upscale_v) && s->avctx->lowres) { + av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n"); + return AVERROR_PATCHWELCOME; + } + if (s->ls) { + s->upscale_h = s->upscale_v = 0; + if (s->nb_components > 1) + s->avctx->pix_fmt = AV_PIX_FMT_RGB24; + else if (s->bits <= 8) + s->avctx->pix_fmt = AV_PIX_FMT_GRAY8; + else + s->avctx->pix_fmt = AV_PIX_FMT_GRAY16; + } + + av_frame_unref(s->picture_ptr); + if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0) + return -1; + s->picture_ptr->pict_type = AV_PICTURE_TYPE_I; + s->picture_ptr->key_frame = 1; + s->got_picture = 1; + + for (i = 0; i < 3; i++) + s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced; + + av_dlog(s->avctx, "%d %d %d %d %d %d\n", + s->width, s->height, s->linesize[0], s->linesize[1], + s->interlaced, s->avctx->height); + + if (len != (8 + (3 * nb_components))) + av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len); + } + + if (s->rgb && !s->lossless && !s->ls) { + av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n"); + return AVERROR_PATCHWELCOME; + } + + /* totally blank picture as progressive JPEG will only add details to it */ + if (s->progressive) { + int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8); + int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8); + for (i = 0; i < s->nb_components; i++) { + int size = bw * bh * s->h_count[i] * s->v_count[i]; + av_freep(&s->blocks[i]); + av_freep(&s->last_nnz[i]); + s->blocks[i] = av_malloc(size * sizeof(**s->blocks)); + s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz)); + 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) { + 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 0xffff; + } + + 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 == 0xffff) { + 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 == 0xffff) { + 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 void handle_rstn(MJpegDecodeContext *s, int nb_components) +{ + int i; + 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] = 1024; + } + + 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] = 1024; + } else + skip_bits_long(&s->gb, pos - get_bits_count(&s->gb)); + } + } + } +} + +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[3], top[3], topleft[3]; + const int linesize = s->linesize[0]; + const int mask = (1 << s->bits) - 1; + int resync_mb_y = 0; + int resync_mb_x = 0; + + 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 < 3; i++) + buffer[0][i] = 1 << (s->bits - 1); + + for (mb_y = 0; mb_y < s->mb_height; mb_y++) { + uint8_t *ptr = s->picture.data[0] + (linesize * mb_y); + + if (s->interlaced && s->bottom_field) + ptr += linesize >> 1; + + for (i = 0; i < 3; 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<3; 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;idc_index[i]); + if(dc == 0xFFFF) + 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->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; icomp_index[i]; + for(mb_x = 0; mb_x < s->mb_width; mb_x++) { + ptr[3*mb_x+2-c] = buffer[mb_x][i]; + } + } + } + } + return 0; +} + +static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int nb_components, int predictor, + int point_transform) +{ + int i, mb_x, mb_y; + int bits= (s->bits+7)&~7; + int resync_mb_y = 0; + int resync_mb_x = 0; + + point_transform += bits - s->bits; + + av_assert0(nb_components>=1 && nb_components<=3); + + for (mb_y = 0; mb_y < s->mb_height; mb_y++) { + for (mb_x = 0; mb_x < s->mb_width; mb_x++) { + if (s->restart_interval && !s->restart_count){ + s->restart_count = s->restart_interval; + 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; jdc_index[i]); + if(dc == 0xFFFF) + return -1; + if(bits<=8){ + ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap + if(y==0 && toprow){ + if(x==0 && leftcol){ + pred= 1 << (bits - 1); + }else{ + pred= ptr[-1]; + } + }else{ + if(x==0 && leftcol){ + pred= ptr[-linesize]; + }else{ + PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor); + } + } + + if (s->interlaced && s->bottom_field) + ptr += linesize >> 1; + pred &= (-1)<<(8-s->bits); + *ptr= pred + (dc << point_transform); + }else{ + ptr16 = (uint16_t*)(s->picture.data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap + if(y==0 && toprow){ + if(x==0 && leftcol){ + pred= 1 << (bits - 1); + }else{ + pred= ptr16[-1]; + } + }else{ + if(x==0 && leftcol){ + pred= ptr16[-linesize]; + }else{ + PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor); + } + } + + if (s->interlaced && s->bottom_field) + ptr16 += linesize >> 1; + pred &= (-1)<<(16-s->bits); + *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 == 0xFFFF) + return -1; + if(bits<=8){ + ptr = s->picture.data[c] + + (linesize * (v * mb_y + y)) + + (h * mb_x + x); //FIXME optimize this crap + PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor); + + pred &= (-1)<<(8-s->bits); + *ptr = pred + (dc << point_transform); + }else{ + ptr16 = (uint16_t*)(s->picture.data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap + PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor); + + pred &= (-1)<<(16-s->bits); + *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 int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah, + int Al, const uint8_t *mb_bitmask, + const AVFrame *reference) +{ + int i, mb_x, mb_y; + uint8_t *data[MAX_COMPONENTS]; + const uint8_t *reference_data[MAX_COMPONENTS]; + int linesize[MAX_COMPONENTS]; + GetBitContext mb_bitmask_gb; + + if (mb_bitmask) + init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height); + + if (s->flipped && s->avctx->lowres) { + av_log(s->avctx, AV_LOG_ERROR, "Can not flip image with lowres\n"); + s->flipped = 0; + } + + for (i = 0; i < nb_components; i++) { + int c = s->comp_index[i]; + data[c] = s->picture_ptr->data[c]; + reference_data[c] = reference ? reference->data[c] : NULL; + linesize[c] = s->linesize[c]; + s->coefs_finished[c] |= 1; + if (s->flipped && !(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) >> 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_index[c]]) < 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); + } + } 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_index[c]][0] << Al; + else if (decode_dc_progressive(s, block, i, s->dc_index[i], + s->quant_matrixes[s->quant_index[c]], + Al) < 0) { + av_log(s->avctx, AV_LOG_ERROR, + "error y=%d x=%d\n", mb_y, mb_x); + return AVERROR_INVALIDDATA; + } + } + av_dlog(s->avctx, "mb: %d %d processed\n", mb_y, mb_x); + av_dlog(s->avctx, "%d %d %d %d %d %d %d %d \n", + mb_x, mb_y, x, y, c, s->bottom_field, + (v * mb_y + y) * 8, (h * mb_x + x) * 8); + if (++x == h) { + x = 0; + y++; + } + } + } + + handle_rstn(s, nb_components); + } + } + return 0; +} + +static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss, + int se, int Ah, int Al) +{ + int mb_x, mb_y; + int EOBRUN = 0; + int c = s->comp_index[0]; + uint8_t *data = s->picture.data[c]; + int linesize = s->linesize[c]; + int last_scan = 0; + int16_t *quant_matrix = s->quant_matrixes[s->quant_index[c]]; + + if (se > 63) { + av_log(s->avctx, AV_LOG_ERROR, "SE %d is too large\n", 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); + ptr += 8 >> s->avctx->lowres; + } + handle_rstn(s, 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; + + 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->nb_blocks[i] = s->h_count[index] * s->v_count[index]; + s->h_scount[i] = s->h_count[index]; + s->v_scount[i] = s->v_count[index]; + + s->dc_index[i] = get_bits(&s->gb, 4); + s->ac_index[i] = get_bits(&s->gb, 4); + + if (s->dc_index[i] < 0 || s->ac_index[i] < 0 || + s->dc_index[i] >= 4 || s->ac_index[i] >= 4) + goto out_of_range; + if (!s->vlcs[0][s->dc_index[i]].table || !(s->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] = 1024; + + 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, nb_components, predictor, point_transform)) < 0) + return ret; + } + } + } else { + if (s->progressive && predictor) { + av_assert0(s->picture_ptr == &s->picture); + if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor, + ilv, prev_shift, + point_transform)) < 0) + return ret; + } else { + if ((ret = mjpeg_decode_scan(s, nb_components, + prev_shift, point_transform, + mb_bitmask, reference)) < 0) + return ret; + } + } + + if (s->interlaced && + get_bits_left(&s->gb) > 32 && + show_bits(&s->gb, 8) == 0xFF) { + GetBitContext bak = s->gb; + align_get_bits(&bak); + if (show_bits(&bak, 16) == 0xFFD1) { + av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n"); + s->gb = bak; + skip_bits(&s->gb, 16); + s->bottom_field ^= 1; + + goto next_field; + } + } + + emms_c(); + return 0; + out_of_range: + av_log(s->avctx, AV_LOG_ERROR, "decode_sos: ac/dc index out of range\n"); + return AVERROR_INVALIDDATA; +} + +static int mjpeg_decode_dri(MJpegDecodeContext *s) +{ + if (get_bits(&s->gb, 16) != 4) + return AVERROR_INVALIDDATA; + s->restart_interval = get_bits(&s->gb, 16); + s->restart_count = 0; + av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n", + s->restart_interval); + + return 0; +} + +static int mjpeg_decode_app(MJpegDecodeContext *s) +{ + int len, id, i; + + len = get_bits(&s->gb, 16); + if (len < 5) + return AVERROR_INVALIDDATA; + if (8 * len > get_bits_left(&s->gb)) + return AVERROR_INVALIDDATA; + + id = get_bits_long(&s->gb, 32); + len -= 6; + + if (s->avctx->debug & FF_DEBUG_STARTCODE) + av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id); + + /* Buggy AVID, it puts EOI only at every 10th frame. */ + /* Also, this fourcc is used by non-avid files too, it holds some + information, but it's always present in AVID-created files. */ + if (id == AV_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 (get_bits(&s->gb, 8)) { + case 1: + s->rgb = 1; + s->pegasus_rct = 0; + break; + case 2: + s->rgb = 1; + s->pegasus_rct = 1; + break; + default: + av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n"); + } + len -= 9; + goto out; + } + + /* Apple MJPEG-A */ + if ((s->start_code == APP1) && (len > (0x28 - 8))) { + id = get_bits_long(&s->gb, 32); + 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 (!strcmp(cbuf, "AVID")) { + s->buggy_avid = 1; + } else if (!strcmp(cbuf, "CS=ITU601")) + s->cs_itu601 = 1; + else if ((len > 31 && !strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32)) || + (len > 19 && !strncmp(cbuf, "Metasoft MJPEG Codec", 20))) + s->flipped = 1; + + av_free(cbuf); + } + } + + return 0; +} + +/* return the 8 bit start code value and update the search + state. Return -1 if no start code found */ +static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end) +{ + const uint8_t *buf_ptr; + unsigned int v, v2; + int val; + int skipped = 0; + + buf_ptr = *pbuf_ptr; + while (buf_ptr < buf_end) { + v = *buf_ptr++; + v2 = *buf_ptr; + if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) { + val = *buf_ptr++; + goto found; + } + skipped++; + } + 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 unescaped_buf_size; + int start_code; + int i, index; + int ret = 0; + + 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 > (1U<<28)) { + av_log(avctx, AV_LOG_ERROR, "MJPEG packet 0x%x too big (0x%x/0x%x), corrupt data?\n", + start_code, unescaped_buf_size, buf_size); + return AVERROR_INVALIDDATA; + } else { + av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n", + start_code, buf_end - buf_ptr); + + init_get_bits(&s->gb, unescaped_buf_ptr, unescaped_buf_size * 8); + + s->start_code = start_code; + if (s->avctx->debug & FF_DEBUG_STARTCODE) + av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code); + + /* process markers */ + if (start_code >= 0xd0 && start_code <= 0xd7) + av_log(avctx, AV_LOG_DEBUG, + "restart marker: %d\n", start_code & 0x0f); + /* APP fields */ + else if (start_code >= APP0 && start_code <= APP15) + mjpeg_decode_app(s); + /* Comment */ + else if (start_code == COM) + mjpeg_decode_com(s); + + ret = -1; + 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]]; + 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, s->width); + } else { + for (index = 0; index < s->width; 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 hshift, vshift, 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 = -((-w) >> hshift); + h = -((-h) >> vshift); + } + if(dst){ + uint8_t *dst2 = dst + s->linesize[index]*(h-1); + for (i=0; ilinesize[index]; + dst2 -= s->linesize[index]; + } + } + } + } + + 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->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]); + } + 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", + .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, + .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"), + .priv_class = &mjpegdec_class, +}; +#endif +#if CONFIG_THP_DECODER +AVCodec ff_thp_decoder = { + .name = "thp", + .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, + .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"), +}; +#endif -- cgit v1.2.3