| /* |
| * MJPEG decoder |
| * Copyright (c) 2000, 2001 Fabrice Bellard |
| * Copyright (c) 2003 Alex Beregszaszi |
| * Copyright (c) 2003-2004 Michael Niedermayer |
| * |
| * 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. |
| */ |
| |
| #ifndef AVCODEC_MJPEGDEC_H |
| #define AVCODEC_MJPEGDEC_H |
| |
| #include "libavutil/log.h" |
| #include "libavutil/mem_internal.h" |
| #include "libavutil/pixdesc.h" |
| #include "libavutil/stereo3d.h" |
| |
| #include "avcodec.h" |
| #include "blockdsp.h" |
| #include "get_bits.h" |
| #include "hpeldsp.h" |
| #include "idctdsp.h" |
| |
| #undef near /* This file uses struct member 'near' which in windows.h is defined as empty. */ |
| |
| #define MAX_COMPONENTS 4 |
| |
| typedef struct MJpegDecodeContext { |
| AVClass *class; |
| AVCodecContext *avctx; |
| GetBitContext gb; |
| int buf_size; |
| |
| AVPacket *pkt; |
| |
| int start_code; /* current start code */ |
| int buffer_size; |
| uint8_t *buffer; |
| |
| uint16_t quant_matrixes[4][64]; |
| VLC vlcs[3][4]; |
| int qscale[4]; ///< quantizer scale calculated from quant_matrixes |
| |
| int orig_height; /* size given at codec init */ |
| int first_picture; /* true if decoding first picture */ |
| int interlaced; /* true if interlaced */ |
| int bottom_field; /* true if bottom field */ |
| int lossless; |
| int ls; |
| int progressive; |
| int bayer; /* true if it's a bayer-encoded JPEG embedded in a DNG */ |
| int rgb; |
| uint8_t upscale_h[4]; |
| uint8_t upscale_v[4]; |
| int rct; /* standard rct */ |
| int pegasus_rct; /* pegasus reversible colorspace transform */ |
| int bits; /* bits per component */ |
| int colr; |
| int xfrm; |
| int adobe_transform; |
| |
| int maxval; |
| int near; ///< near lossless bound (si 0 for lossless) |
| int t1,t2,t3; |
| int reset; ///< context halfing interval ?rename |
| |
| int width, height; |
| int mb_width, mb_height; |
| int nb_components; |
| int block_stride[MAX_COMPONENTS]; |
| int component_id[MAX_COMPONENTS]; |
| int h_count[MAX_COMPONENTS]; /* horizontal and vertical count for each component */ |
| int v_count[MAX_COMPONENTS]; |
| int comp_index[MAX_COMPONENTS]; |
| int dc_index[MAX_COMPONENTS]; |
| int ac_index[MAX_COMPONENTS]; |
| int nb_blocks[MAX_COMPONENTS]; |
| int h_scount[MAX_COMPONENTS]; |
| int v_scount[MAX_COMPONENTS]; |
| int quant_sindex[MAX_COMPONENTS]; |
| int h_max, v_max; /* maximum h and v counts */ |
| int quant_index[4]; /* quant table index for each component */ |
| int last_dc[MAX_COMPONENTS]; /* last DEQUANTIZED dc (XXX: am I right to do that ?) */ |
| AVFrame *picture; /* picture structure */ |
| AVFrame *picture_ptr; /* pointer to picture structure */ |
| int got_picture; ///< we found a SOF and picture is valid, too. |
| int linesize[MAX_COMPONENTS]; ///< linesize << interlaced |
| int8_t *qscale_table; |
| DECLARE_ALIGNED(32, int16_t, block)[64]; |
| int16_t (*blocks[MAX_COMPONENTS])[64]; ///< intermediate sums (progressive mode) |
| uint8_t *last_nnz[MAX_COMPONENTS]; |
| uint64_t coefs_finished[MAX_COMPONENTS]; ///< bitmask of which coefs have been completely decoded (progressive mode) |
| int palette_index; |
| ScanTable scantable; |
| BlockDSPContext bdsp; |
| HpelDSPContext hdsp; |
| IDCTDSPContext idsp; |
| |
| int restart_interval; |
| int restart_count; |
| |
| int buggy_avid; |
| int cs_itu601; |
| int interlace_polarity; |
| int multiscope; |
| |
| int mjpb_skiptosod; |
| |
| int cur_scan; /* current scan, used by JPEG-LS */ |
| int flipped; /* true if picture is flipped */ |
| |
| uint16_t (*ljpeg_buffer)[4]; |
| unsigned int ljpeg_buffer_size; |
| |
| int extern_huff; |
| AVDictionary *exif_metadata; |
| |
| AVStereo3D *stereo3d; ///!< stereoscopic information (cached, since it is read before frame allocation) |
| |
| const AVPixFmtDescriptor *pix_desc; |
| |
| uint8_t **iccdata; |
| int *iccdatalens; |
| int iccnum; |
| int iccread; |
| |
| AVFrame *smv_frame; |
| int smv_frames_per_jpeg; |
| int smv_next_frame; |
| |
| // Raw stream data for hwaccel use. |
| const uint8_t *raw_image_buffer; |
| size_t raw_image_buffer_size; |
| const uint8_t *raw_scan_buffer; |
| size_t raw_scan_buffer_size; |
| |
| uint8_t raw_huffman_lengths[2][4][16]; |
| uint8_t raw_huffman_values[2][4][256]; |
| |
| enum AVPixelFormat hwaccel_sw_pix_fmt; |
| enum AVPixelFormat hwaccel_pix_fmt; |
| void *hwaccel_picture_private; |
| } MJpegDecodeContext; |
| |
| int ff_mjpeg_build_vlc(VLC *vlc, const uint8_t *bits_table, |
| const uint8_t *val_table, int is_ac, void *logctx); |
| int ff_mjpeg_decode_init(AVCodecContext *avctx); |
| int ff_mjpeg_decode_end(AVCodecContext *avctx); |
| int ff_mjpeg_receive_frame(AVCodecContext *avctx, AVFrame *frame); |
| int ff_mjpeg_decode_dqt(MJpegDecodeContext *s); |
| int ff_mjpeg_decode_dht(MJpegDecodeContext *s); |
| int ff_mjpeg_decode_sof(MJpegDecodeContext *s); |
| int ff_mjpeg_decode_sos(MJpegDecodeContext *s, |
| const uint8_t *mb_bitmask,int mb_bitmask_size, |
| const AVFrame *reference); |
| 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 ff_sp5x_process_packet(AVCodecContext *avctx, AVPacket *avpkt); |
| |
| #endif /* AVCODEC_MJPEGDEC_H */ |