mirror of
https://github.com/FFmpeg/FFmpeg.git
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560 lines
19 KiB
C
560 lines
19 KiB
C
/*
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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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* @file
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* TIFF image encoder
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* @author Bartlomiej Wolowiec
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*/
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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 "libavutil/imgutils.h"
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#include "libavutil/log.h"
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#include "libavutil/opt.h"
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#include "libavutil/pixdesc.h"
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#include "avcodec.h"
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#include "bytestream.h"
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#include "internal.h"
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#include "lzw.h"
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#include "put_bits.h"
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#include "rle.h"
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#include "tiff.h"
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#define TIFF_MAX_ENTRY 32
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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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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]; ///< entries in header
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int num_entries; ///< number of entries
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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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* 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, enum TiffTags tag,
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enum TiffTypes type, int count, 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] * (int64_t)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 * (int64_t)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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{
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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),
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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, const AVFrame *p,
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uint8_t *dst, int lnum)
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{
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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 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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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
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TiffEncoderContext *s = avctx->priv_data;
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const AVFrame *const p = pict;
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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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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(desc);
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s->bpp_tab_size = desc->nb_components;
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switch (avctx->pix_fmt) {
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case AV_PIX_FMT_RGBA64LE:
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case AV_PIX_FMT_RGBA:
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alpha = 1;
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case AV_PIX_FMT_RGB48LE:
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case AV_PIX_FMT_RGB24:
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s->photometric_interpretation = 2;
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break;
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case AV_PIX_FMT_GRAY8:
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avctx->bits_per_coded_sample = 0x28;
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case AV_PIX_FMT_GRAY8A:
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alpha = avctx->pix_fmt == AV_PIX_FMT_GRAY8A;
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case AV_PIX_FMT_GRAY16LE:
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case AV_PIX_FMT_MONOBLACK:
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s->photometric_interpretation = 1;
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break;
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case AV_PIX_FMT_PAL8:
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s->photometric_interpretation = 3;
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break;
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case AV_PIX_FMT_MONOWHITE:
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s->photometric_interpretation = 0;
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break;
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case AV_PIX_FMT_YUV420P:
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case AV_PIX_FMT_YUV422P:
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case AV_PIX_FMT_YUV440P:
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case AV_PIX_FMT_YUV444P:
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case AV_PIX_FMT_YUV410P:
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case AV_PIX_FMT_YUV411P:
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av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &shift_h, &shift_v);
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s->photometric_interpretation = 6;
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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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for (i = 0; i < s->bpp_tab_size; i++)
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bpp_tab[i] = desc->comp[i].depth_minus1 + 1;
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if (s->compr == TIFF_DEFLATE ||
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s->compr == TIFF_ADOBE_DEFLATE ||
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s->compr == TIFF_LZW)
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// best choice for DEFLATE
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s->rps = s->height;
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else
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// suggest size of strip
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s->rps = FFMAX(8192 / (((s->width * s->bpp) >> 3) + 1), 1);
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// round rps up
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s->rps = ((s->rps - 1) / s->subsampling[1] + 1) * s->subsampling[1];
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strips = (s->height - 1) / s->rps + 1;
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if ((ret = ff_alloc_packet2(avctx, pkt,
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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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av_log(s->avctx, AV_LOG_ERROR, "Not enough memory\n");
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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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if (!zbuf) {
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ret = AVERROR(ENOMEM);
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goto fail;
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}
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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, p, 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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} 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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if (!s->lzws) {
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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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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,
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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, p, 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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} 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 &&
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(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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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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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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if (avctx->sample_aspect_ratio.num > 0 &&
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avctx->sample_aspect_ratio.den > 0) {
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AVRational y = av_mul_q(av_make_q(s->dpi, 1),
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avctx->sample_aspect_ratio);
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res[0] = y.num;
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res[1] = y.den;
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}
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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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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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if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
|
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uint16_t pal[256 * 3];
|
|
for (i = 0; i < 256; i++) {
|
|
uint32_t rgb = *(uint32_t *) (p->data[1] + i * 4);
|
|
pal[i] = ((rgb >> 16) & 0xff) * 257;
|
|
pal[i + 256] = ((rgb >> 8) & 0xff) * 257;
|
|
pal[i + 512] = (rgb & 0xff) * 257;
|
|
}
|
|
add_entry(s, TIFF_PAL, TIFF_SHORT, 256 * 3, pal);
|
|
}
|
|
if (alpha)
|
|
add_entry1(s,TIFF_EXTRASAMPLES, TIFF_SHORT, 2);
|
|
if (is_yuv) {
|
|
/** according to CCIR Recommendation 601.1 */
|
|
uint32_t refbw[12] = { 15, 1, 235, 1, 128, 1, 240, 1, 128, 1, 240, 1 };
|
|
add_entry(s, TIFF_YCBCR_SUBSAMPLING, TIFF_SHORT, 2, s->subsampling);
|
|
if (avctx->chroma_sample_location == AVCHROMA_LOC_TOPLEFT)
|
|
add_entry1(s, TIFF_YCBCR_POSITIONING, TIFF_SHORT, 2);
|
|
add_entry(s, TIFF_REFERENCE_BW, TIFF_RATIONAL, 6, refbw);
|
|
}
|
|
// write offset to dir
|
|
bytestream_put_le32(&offset, ptr - pkt->data);
|
|
|
|
if (check_size(s, 6 + s->num_entries * 12)) {
|
|
ret = AVERROR(EINVAL);
|
|
goto fail;
|
|
}
|
|
bytestream_put_le16(&ptr, s->num_entries); // write tag count
|
|
bytestream_put_buffer(&ptr, s->entries, s->num_entries * 12);
|
|
bytestream_put_le32(&ptr, 0);
|
|
|
|
pkt->size = ptr - pkt->data;
|
|
pkt->flags |= AV_PKT_FLAG_KEY;
|
|
*got_packet = 1;
|
|
|
|
fail:
|
|
return ret < 0 ? ret : 0;
|
|
}
|
|
|
|
static av_cold int encode_init(AVCodecContext *avctx)
|
|
{
|
|
TiffEncoderContext *s = avctx->priv_data;
|
|
|
|
avctx->coded_frame = av_frame_alloc();
|
|
if (!avctx->coded_frame)
|
|
return AVERROR(ENOMEM);
|
|
|
|
avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
|
|
avctx->coded_frame->key_frame = 1;
|
|
s->avctx = avctx;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static av_cold int encode_close(AVCodecContext *avctx)
|
|
{
|
|
TiffEncoderContext *s = avctx->priv_data;
|
|
|
|
av_frame_free(&avctx->coded_frame);
|
|
av_freep(&s->strip_sizes);
|
|
av_freep(&s->strip_offsets);
|
|
av_freep(&s->yuv_line);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define OFFSET(x) offsetof(TiffEncoderContext, x)
|
|
#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
|
|
static const AVOption options[] = {
|
|
{"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},
|
|
{ "compression_algo", NULL, OFFSET(compr), AV_OPT_TYPE_INT, { .i64 = TIFF_PACKBITS }, TIFF_RAW, TIFF_DEFLATE, VE, "compression_algo" },
|
|
{ "packbits", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = TIFF_PACKBITS }, 0, 0, VE, "compression_algo" },
|
|
{ "raw", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = TIFF_RAW }, 0, 0, VE, "compression_algo" },
|
|
{ "lzw", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = TIFF_LZW }, 0, 0, VE, "compression_algo" },
|
|
#if CONFIG_ZLIB
|
|
{ "deflate", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = TIFF_DEFLATE }, 0, 0, VE, "compression_algo" },
|
|
#endif
|
|
{ NULL },
|
|
};
|
|
|
|
static const AVClass tiffenc_class = {
|
|
.class_name = "TIFF encoder",
|
|
.item_name = av_default_item_name,
|
|
.option = options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
|
|
AVCodec ff_tiff_encoder = {
|
|
.name = "tiff",
|
|
.long_name = NULL_IF_CONFIG_SMALL("TIFF image"),
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_TIFF,
|
|
.priv_data_size = sizeof(TiffEncoderContext),
|
|
.init = encode_init,
|
|
.close = encode_close,
|
|
.encode2 = encode_frame,
|
|
.pix_fmts = (const enum AVPixelFormat[]) {
|
|
AV_PIX_FMT_RGB24, AV_PIX_FMT_PAL8, AV_PIX_FMT_GRAY8,
|
|
AV_PIX_FMT_GRAY8A, AV_PIX_FMT_GRAY16LE,
|
|
AV_PIX_FMT_MONOBLACK, AV_PIX_FMT_MONOWHITE,
|
|
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
|
|
AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_RGB48LE,
|
|
AV_PIX_FMT_RGBA, AV_PIX_FMT_RGBA64LE,
|
|
AV_PIX_FMT_NONE
|
|
},
|
|
.priv_class = &tiffenc_class,
|
|
};
|