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533 lines
18 KiB
533 lines
18 KiB
/* |
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* TIFF image encoder |
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* Copyright (c) 2007 Bartlomiej Wolowiec |
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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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|
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/** |
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* @file |
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* TIFF image encoder |
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* @author Bartlomiej Wolowiec |
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*/ |
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|
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#include "libavutil/imgutils.h" |
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#include "libavutil/log.h" |
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#include "libavutil/opt.h" |
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|
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#include "avcodec.h" |
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#include "config.h" |
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#if CONFIG_ZLIB |
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#include <zlib.h> |
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#endif |
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#include "bytestream.h" |
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#include "internal.h" |
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#include "tiff.h" |
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#include "rle.h" |
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#include "lzw.h" |
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#include "put_bits.h" |
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#define TIFF_MAX_ENTRY 32 |
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|
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/** sizes of various TIFF field types (string size = 1)*/ |
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static const uint8_t type_sizes2[14] = { |
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0, 1, 1, 2, 4, 8, 1, 1, 2, 4, 8, 4, 8, 4 |
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}; |
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typedef struct TiffEncoderContext { |
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AVClass *class; ///< for private options |
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AVCodecContext *avctx; |
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AVFrame picture; |
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|
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int width; ///< picture width |
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int height; ///< picture height |
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unsigned int bpp; ///< bits per pixel |
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int compr; ///< compression level |
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int bpp_tab_size; ///< bpp_tab size |
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int photometric_interpretation; ///< photometric interpretation |
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int strips; ///< number of strips |
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uint32_t *strip_sizes; |
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unsigned int strip_sizes_size; |
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uint32_t *strip_offsets; |
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unsigned int strip_offsets_size; |
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uint8_t *yuv_line; |
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unsigned int yuv_line_size; |
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int rps; ///< row per strip |
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uint8_t entries[TIFF_MAX_ENTRY*12]; ///< entires in header |
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int num_entries; ///< number of entires |
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uint8_t **buf; ///< actual position in buffer |
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uint8_t *buf_start; ///< pointer to first byte in buffer |
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int buf_size; ///< buffer size |
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uint16_t subsampling[2]; ///< YUV subsampling factors |
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struct LZWEncodeState *lzws; ///< LZW Encode state |
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uint32_t dpi; ///< image resolution in DPI |
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} TiffEncoderContext; |
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/** |
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* Check free space in buffer. |
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* |
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* @param s Tiff context |
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* @param need Needed bytes |
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* @return 0 - ok, 1 - no free space |
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*/ |
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static inline int check_size(TiffEncoderContext * s, uint64_t need) |
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{ |
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if (s->buf_size < *s->buf - s->buf_start + need) { |
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*s->buf = s->buf_start + s->buf_size + 1; |
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av_log(s->avctx, AV_LOG_ERROR, "Buffer is too small\n"); |
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return 1; |
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} |
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return 0; |
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} |
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|
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/** |
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* Put n values to buffer. |
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* |
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* @param p pointer to pointer to output buffer |
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* @param n number of values |
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* @param val pointer to values |
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* @param type type of values |
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* @param flip = 0 - normal copy, >0 - flip |
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*/ |
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static void tnput(uint8_t ** p, int n, const uint8_t * val, enum TiffTypes type, |
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int flip) |
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{ |
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int i; |
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#if HAVE_BIGENDIAN |
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flip ^= ((int[]) {0, 0, 0, 1, 3, 3})[type]; |
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#endif |
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for (i = 0; i < n * type_sizes2[type]; i++) |
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*(*p)++ = val[i ^ flip]; |
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} |
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/** |
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* Add entry to directory in tiff header. |
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* |
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* @param s Tiff context |
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* @param tag tag that identifies the entry |
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* @param type entry type |
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* @param count the number of values |
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* @param ptr_val pointer to values |
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*/ |
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static void add_entry(TiffEncoderContext * s, |
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enum TiffTags tag, enum TiffTypes type, int count, |
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const void *ptr_val) |
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{ |
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uint8_t *entries_ptr = s->entries + 12 * s->num_entries; |
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av_assert0(s->num_entries < TIFF_MAX_ENTRY); |
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bytestream_put_le16(&entries_ptr, tag); |
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bytestream_put_le16(&entries_ptr, type); |
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bytestream_put_le32(&entries_ptr, count); |
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if (type_sizes[type] * count <= 4) { |
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tnput(&entries_ptr, count, ptr_val, type, 0); |
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} else { |
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bytestream_put_le32(&entries_ptr, *s->buf - s->buf_start); |
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check_size(s, count * type_sizes2[type]); |
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tnput(s->buf, count, ptr_val, type, 0); |
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} |
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s->num_entries++; |
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} |
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static void add_entry1(TiffEncoderContext * s, |
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enum TiffTags tag, enum TiffTypes type, int val){ |
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uint16_t w = val; |
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uint32_t dw= val; |
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add_entry(s, tag, type, 1, type == TIFF_SHORT ? (void *)&w : (void *)&dw); |
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} |
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/** |
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* Encode one strip in tiff file. |
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* |
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* @param s Tiff context |
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* @param src input buffer |
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* @param dst output buffer |
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* @param n size of input buffer |
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* @param compr compression method |
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* @return number of output bytes. If an output error is encountered, -1 is returned |
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*/ |
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static int encode_strip(TiffEncoderContext * s, const int8_t * src, |
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uint8_t * dst, int n, int compr) |
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{ |
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switch (compr) { |
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#if CONFIG_ZLIB |
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case TIFF_DEFLATE: |
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case TIFF_ADOBE_DEFLATE: |
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{ |
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unsigned long zlen = s->buf_size - (*s->buf - s->buf_start); |
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if (compress(dst, &zlen, src, n) != Z_OK) { |
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av_log(s->avctx, AV_LOG_ERROR, "Compressing failed\n"); |
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return -1; |
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} |
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return zlen; |
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} |
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#endif |
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case TIFF_RAW: |
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if (check_size(s, n)) |
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return -1; |
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memcpy(dst, src, n); |
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return n; |
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case TIFF_PACKBITS: |
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return ff_rle_encode(dst, s->buf_size - (*s->buf - s->buf_start), src, 1, n, 2, 0xff, -1, 0); |
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case TIFF_LZW: |
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return ff_lzw_encode(s->lzws, src, n); |
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default: |
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return -1; |
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} |
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} |
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static void pack_yuv(TiffEncoderContext * s, uint8_t * dst, int lnum) |
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{ |
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AVFrame *p = &s->picture; |
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int i, j, k; |
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int w = (s->width - 1) / s->subsampling[0] + 1; |
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uint8_t *pu = &p->data[1][lnum / s->subsampling[1] * p->linesize[1]]; |
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uint8_t *pv = &p->data[2][lnum / s->subsampling[1] * p->linesize[2]]; |
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if(s->width % s->subsampling[0] || s->height % s->subsampling[1]){ |
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for (i = 0; i < w; i++){ |
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for (j = 0; j < s->subsampling[1]; j++) |
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for (k = 0; k < s->subsampling[0]; k++) |
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*dst++ = p->data[0][FFMIN(lnum + j, s->height-1) * p->linesize[0] + |
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FFMIN(i * s->subsampling[0] + k, s->width-1)]; |
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*dst++ = *pu++; |
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*dst++ = *pv++; |
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} |
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}else{ |
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for (i = 0; i < w; i++){ |
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for (j = 0; j < s->subsampling[1]; j++) |
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for (k = 0; k < s->subsampling[0]; k++) |
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*dst++ = p->data[0][(lnum + j) * p->linesize[0] + |
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i * s->subsampling[0] + k]; |
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*dst++ = *pu++; |
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*dst++ = *pv++; |
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} |
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} |
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} |
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static av_cold int encode_init(AVCodecContext *avctx) |
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{ |
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TiffEncoderContext *s = avctx->priv_data; |
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avctx->coded_frame= &s->picture; |
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avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I; |
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avctx->coded_frame->key_frame = 1; |
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s->avctx = avctx; |
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return 0; |
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} |
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static int encode_frame(AVCodecContext * avctx, AVPacket *pkt, |
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const AVFrame *pict, int *got_packet) |
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{ |
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TiffEncoderContext *s = avctx->priv_data; |
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AVFrame *const p = &s->picture; |
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int i; |
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uint8_t *ptr; |
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uint8_t *offset; |
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uint32_t strips; |
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int bytes_per_row; |
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uint32_t res[2] = { s->dpi, 1 }; // image resolution (72/1) |
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uint16_t bpp_tab[4]; |
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int ret = -1; |
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int is_yuv = 0, alpha = 0; |
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int shift_h, shift_v; |
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*p = *pict; |
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s->width = avctx->width; |
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s->height = avctx->height; |
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s->subsampling[0] = 1; |
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s->subsampling[1] = 1; |
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avctx->bits_per_coded_sample = |
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s->bpp = av_get_bits_per_pixel(&av_pix_fmt_descriptors[avctx->pix_fmt]); |
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switch (avctx->pix_fmt) { |
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case PIX_FMT_RGBA64LE: |
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case PIX_FMT_RGBA: |
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alpha = 1; |
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case PIX_FMT_RGB48LE: |
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case PIX_FMT_RGB24: |
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s->photometric_interpretation = 2; |
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break; |
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case PIX_FMT_GRAY8: |
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avctx->bits_per_coded_sample = 0x28; |
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case PIX_FMT_GRAY8A: |
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alpha = avctx->pix_fmt == PIX_FMT_GRAY8A; |
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case PIX_FMT_GRAY16LE: |
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case PIX_FMT_MONOBLACK: |
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s->photometric_interpretation = 1; |
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break; |
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case PIX_FMT_PAL8: |
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s->photometric_interpretation = 3; |
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break; |
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case PIX_FMT_MONOWHITE: |
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s->photometric_interpretation = 0; |
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break; |
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case PIX_FMT_YUV420P: |
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case PIX_FMT_YUV422P: |
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case PIX_FMT_YUV440P: |
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case PIX_FMT_YUV444P: |
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case PIX_FMT_YUV410P: |
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case PIX_FMT_YUV411P: |
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s->photometric_interpretation = 6; |
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avcodec_get_chroma_sub_sample(avctx->pix_fmt, |
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&shift_h, &shift_v); |
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s->subsampling[0] = 1 << shift_h; |
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s->subsampling[1] = 1 << shift_v; |
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is_yuv = 1; |
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break; |
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default: |
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av_log(s->avctx, AV_LOG_ERROR, |
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"This colors format is not supported\n"); |
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return -1; |
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} |
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s->bpp_tab_size = av_pix_fmt_descriptors[avctx->pix_fmt].nb_components; |
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for (i = 0; i < s->bpp_tab_size; i++) |
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bpp_tab[i] = av_pix_fmt_descriptors[avctx->pix_fmt].comp[i].depth_minus1 + 1; |
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if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE || s->compr == TIFF_LZW) |
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//best choose for DEFLATE |
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s->rps = s->height; |
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else |
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s->rps = FFMAX(8192 / (((s->width * s->bpp) >> 3) + 1), 1); // suggest size of strip |
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s->rps = ((s->rps - 1) / s->subsampling[1] + 1) * s->subsampling[1]; // round rps up |
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strips = (s->height - 1) / s->rps + 1; |
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if ((ret = ff_alloc_packet2(avctx, pkt, avctx->width * avctx->height * s->bpp * 2 + |
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avctx->height * 4 + FF_MIN_BUFFER_SIZE)) < 0) |
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return ret; |
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ptr = pkt->data; |
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s->buf_start = pkt->data; |
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s->buf = &ptr; |
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s->buf_size = pkt->size; |
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if (check_size(s, 8)) |
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goto fail; |
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// write header |
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bytestream_put_le16(&ptr, 0x4949); |
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bytestream_put_le16(&ptr, 42); |
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offset = ptr; |
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bytestream_put_le32(&ptr, 0); |
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av_fast_padded_mallocz(&s->strip_sizes, &s->strip_sizes_size, sizeof(s->strip_sizes[0]) * strips); |
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av_fast_padded_mallocz(&s->strip_offsets, &s->strip_offsets_size, sizeof(s->strip_offsets[0]) * strips); |
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if (!s->strip_sizes || !s->strip_offsets) { |
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ret = AVERROR(ENOMEM); |
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goto fail; |
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} |
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bytes_per_row = (((s->width - 1)/s->subsampling[0] + 1) * s->bpp |
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* s->subsampling[0] * s->subsampling[1] + 7) >> 3; |
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if (is_yuv){ |
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av_fast_padded_malloc(&s->yuv_line, &s->yuv_line_size, bytes_per_row); |
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if (s->yuv_line == NULL){ |
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ret = AVERROR(ENOMEM); |
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goto fail; |
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} |
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} |
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#if CONFIG_ZLIB |
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if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE) { |
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uint8_t *zbuf; |
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int zlen, zn; |
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int j; |
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zlen = bytes_per_row * s->rps; |
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zbuf = av_malloc(zlen); |
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s->strip_offsets[0] = ptr - pkt->data; |
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zn = 0; |
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for (j = 0; j < s->rps; j++) { |
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if (is_yuv){ |
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pack_yuv(s, s->yuv_line, j); |
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memcpy(zbuf + zn, s->yuv_line, bytes_per_row); |
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j += s->subsampling[1] - 1; |
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} |
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else |
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memcpy(zbuf + j * bytes_per_row, |
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p->data[0] + j * p->linesize[0], bytes_per_row); |
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zn += bytes_per_row; |
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} |
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ret = encode_strip(s, zbuf, ptr, zn, s->compr); |
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av_free(zbuf); |
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if (ret < 0) { |
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av_log(s->avctx, AV_LOG_ERROR, "Encode strip failed\n"); |
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goto fail; |
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} |
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ptr += ret; |
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s->strip_sizes[0] = ptr - pkt->data - s->strip_offsets[0]; |
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} else |
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#endif |
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{ |
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if(s->compr == TIFF_LZW) |
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s->lzws = av_malloc(ff_lzw_encode_state_size); |
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for (i = 0; i < s->height; i++) { |
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if (s->strip_sizes[i / s->rps] == 0) { |
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if(s->compr == TIFF_LZW){ |
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ff_lzw_encode_init(s->lzws, ptr, s->buf_size - (*s->buf - s->buf_start), |
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12, FF_LZW_TIFF, put_bits); |
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} |
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s->strip_offsets[i / s->rps] = ptr - pkt->data; |
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} |
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if (is_yuv){ |
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pack_yuv(s, s->yuv_line, i); |
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ret = encode_strip(s, s->yuv_line, ptr, bytes_per_row, s->compr); |
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i += s->subsampling[1] - 1; |
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} |
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else |
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ret = encode_strip(s, p->data[0] + i * p->linesize[0], |
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ptr, bytes_per_row, s->compr); |
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if (ret < 0) { |
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av_log(s->avctx, AV_LOG_ERROR, "Encode strip failed\n"); |
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goto fail; |
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} |
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s->strip_sizes[i / s->rps] += ret; |
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ptr += ret; |
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if(s->compr == TIFF_LZW && (i==s->height-1 || i%s->rps == s->rps-1)){ |
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ret = ff_lzw_encode_flush(s->lzws, flush_put_bits); |
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s->strip_sizes[(i / s->rps )] += ret ; |
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ptr += ret; |
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} |
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} |
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if(s->compr == TIFF_LZW) |
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av_free(s->lzws); |
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} |
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s->num_entries = 0; |
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add_entry1(s,TIFF_SUBFILE, TIFF_LONG, 0); |
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add_entry1(s,TIFF_WIDTH, TIFF_LONG, s->width); |
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add_entry1(s,TIFF_HEIGHT, TIFF_LONG, s->height); |
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|
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if (s->bpp_tab_size) |
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add_entry(s, TIFF_BPP, TIFF_SHORT, s->bpp_tab_size, bpp_tab); |
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|
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add_entry1(s,TIFF_COMPR, TIFF_SHORT, s->compr); |
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add_entry1(s,TIFF_INVERT, TIFF_SHORT, s->photometric_interpretation); |
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add_entry(s, TIFF_STRIP_OFFS, TIFF_LONG, strips, s->strip_offsets); |
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if (s->bpp_tab_size) |
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add_entry1(s,TIFF_SAMPLES_PER_PIXEL, TIFF_SHORT, s->bpp_tab_size); |
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add_entry1(s,TIFF_ROWSPERSTRIP, TIFF_LONG, s->rps); |
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add_entry(s, TIFF_STRIP_SIZE, TIFF_LONG, strips, s->strip_sizes); |
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add_entry(s, TIFF_XRES, TIFF_RATIONAL, 1, res); |
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add_entry(s, TIFF_YRES, TIFF_RATIONAL, 1, res); |
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add_entry1(s,TIFF_RES_UNIT, TIFF_SHORT, 2); |
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|
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if(!(avctx->flags & CODEC_FLAG_BITEXACT)) |
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add_entry(s, TIFF_SOFTWARE_NAME, TIFF_STRING, |
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strlen(LIBAVCODEC_IDENT) + 1, LIBAVCODEC_IDENT); |
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|
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if (avctx->pix_fmt == PIX_FMT_PAL8) { |
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uint16_t pal[256 * 3]; |
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for (i = 0; i < 256; i++) { |
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uint32_t rgb = *(uint32_t *) (p->data[1] + i * 4); |
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pal[i] = ((rgb >> 16) & 0xff) * 257; |
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pal[i + 256] = ((rgb >> 8 ) & 0xff) * 257; |
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pal[i + 512] = ( rgb & 0xff) * 257; |
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} |
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add_entry(s, TIFF_PAL, TIFF_SHORT, 256 * 3, pal); |
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} |
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if (alpha) |
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add_entry1(s,TIFF_EXTRASAMPLES, TIFF_SHORT, 2); |
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if (is_yuv){ |
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/** according to CCIR Recommendation 601.1 */ |
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uint32_t refbw[12] = {15, 1, 235, 1, 128, 1, 240, 1, 128, 1, 240, 1}; |
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add_entry(s, TIFF_YCBCR_SUBSAMPLING, TIFF_SHORT, 2, s->subsampling); |
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add_entry(s, TIFF_REFERENCE_BW, TIFF_RATIONAL, 6, refbw); |
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} |
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bytestream_put_le32(&offset, ptr - pkt->data); // write offset to dir |
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|
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if (check_size(s, 6 + s->num_entries * 12)) { |
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ret = AVERROR(EINVAL); |
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goto fail; |
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} |
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bytestream_put_le16(&ptr, s->num_entries); // write tag count |
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bytestream_put_buffer(&ptr, s->entries, s->num_entries * 12); |
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bytestream_put_le32(&ptr, 0); |
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|
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pkt->size = ptr - pkt->data; |
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pkt->flags |= AV_PKT_FLAG_KEY; |
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*got_packet = 1; |
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|
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fail: |
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return ret < 0 ? ret : 0; |
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} |
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|
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static av_cold int encode_close(AVCodecContext *avctx) |
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{ |
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TiffEncoderContext *s = avctx->priv_data; |
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|
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av_freep(&s->strip_sizes); |
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av_freep(&s->strip_offsets); |
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av_freep(&s->yuv_line); |
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|
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return 0; |
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} |
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|
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#define OFFSET(x) offsetof(TiffEncoderContext, x) |
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#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM |
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static const AVOption options[] = { |
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{"dpi", "set the image resolution (in dpi)", OFFSET(dpi), AV_OPT_TYPE_INT, {.i64 = 72}, 1, 0x10000, AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_ENCODING_PARAM}, |
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{ "compression_algo", NULL, OFFSET(compr), AV_OPT_TYPE_INT, {.i64 = TIFF_PACKBITS}, TIFF_RAW, TIFF_DEFLATE, VE, "compression_algo" }, |
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{ "packbits", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = TIFF_PACKBITS}, 0, 0, VE, "compression_algo" }, |
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{ "raw", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = TIFF_RAW}, 0, 0, VE, "compression_algo" }, |
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{ "lzw", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = TIFF_LZW}, 0, 0, VE, "compression_algo" }, |
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#if CONFIG_ZLIB |
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{ "deflate", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = TIFF_DEFLATE}, 0, 0, VE, "compression_algo" }, |
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#endif |
|
{ NULL }, |
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}; |
|
|
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static const AVClass tiffenc_class = { |
|
.class_name = "TIFF encoder", |
|
.item_name = av_default_item_name, |
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.option = options, |
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.version = LIBAVUTIL_VERSION_INT, |
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}; |
|
|
|
AVCodec ff_tiff_encoder = { |
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.name = "tiff", |
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.type = AVMEDIA_TYPE_VIDEO, |
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.id = AV_CODEC_ID_TIFF, |
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.priv_data_size = sizeof(TiffEncoderContext), |
|
.init = encode_init, |
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.encode2 = encode_frame, |
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.close = encode_close, |
|
.pix_fmts = (const enum PixelFormat[]) { |
|
PIX_FMT_RGB24, PIX_FMT_PAL8, PIX_FMT_GRAY8, |
|
PIX_FMT_GRAY8A, PIX_FMT_GRAY16LE, |
|
PIX_FMT_MONOBLACK, PIX_FMT_MONOWHITE, |
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PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_YUV440P, PIX_FMT_YUV444P, |
|
PIX_FMT_YUV410P, PIX_FMT_YUV411P, PIX_FMT_RGB48LE, |
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PIX_FMT_RGBA, PIX_FMT_RGBA64LE, |
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PIX_FMT_NONE |
|
}, |
|
.long_name = NULL_IF_CONFIG_SMALL("TIFF image"), |
|
.priv_class = &tiffenc_class, |
|
};
|
|
|