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e254af3154
This is mostly straightforward. The major complication is that, as a result of the 16-bit chunk size limitation, ICC profiles may need to be split up into multiple chunks. We also need to make sure to allocate enough extra space in the packet to fit the ICC profile, so modify both mpegvideo_enc.c and ljpegenc.c to take into account this extra overhead, failing cleanly if necessary. Also add a FATE transcode test to ensure that the ICC profile gets written (and read) correctly. Note that this ICC profile is smaller than 64 kB, so this doesn't test the APP2 chunk re-arranging code at all. Signed-off-by: Niklas Haas <git@haasn.dev>
53 lines
2.1 KiB
C
53 lines
2.1 KiB
C
/*
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* lossless JPEG shared bits
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_MJPEGENC_COMMON_H
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#define AVCODEC_MJPEGENC_COMMON_H
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#include <stdint.h>
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#include "avcodec.h"
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#include "idctdsp.h"
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#include "put_bits.h"
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struct MJpegContext;
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int ff_mjpeg_add_icc_profile_size(AVCodecContext *avctx, const AVFrame *frame,
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size_t *max_pkt_size);
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void ff_mjpeg_encode_picture_header(AVCodecContext *avctx, PutBitContext *pb,
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const AVFrame *frame, struct MJpegContext *m,
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ScanTable *intra_scantable, int pred,
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uint16_t luma_intra_matrix[64],
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uint16_t chroma_intra_matrix[64],
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int use_slices);
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void ff_mjpeg_encode_picture_trailer(PutBitContext *pb, int header_bits);
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void ff_mjpeg_escape_FF(PutBitContext *pb, int start);
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void ff_mjpeg_build_huffman_codes(uint8_t *huff_size, uint16_t *huff_code,
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const uint8_t *bits_table,
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const uint8_t *val_table);
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void ff_mjpeg_init_hvsample(AVCodecContext *avctx, int hsample[4], int vsample[4]);
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void ff_mjpeg_encode_dc(PutBitContext *pb, int val,
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uint8_t *huff_size, uint16_t *huff_code);
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int ff_mjpeg_encode_check_pix_fmt(AVCodecContext *avctx);
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#endif /* AVCODEC_MJPEGENC_COMMON_H */
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