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Diffstat (limited to 'contrib/ffmpeg/libavcodec/tiffenc.c')
-rw-r--r--contrib/ffmpeg/libavcodec/tiffenc.c461
1 files changed, 461 insertions, 0 deletions
diff --git a/contrib/ffmpeg/libavcodec/tiffenc.c b/contrib/ffmpeg/libavcodec/tiffenc.c
new file mode 100644
index 000000000..69f8e59f6
--- /dev/null
+++ b/contrib/ffmpeg/libavcodec/tiffenc.c
@@ -0,0 +1,461 @@
+/*
+ * TIFF image encoder
+ * Copyright (c) 2007 Bartlomiej Wolowiec
+ *
+ * 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
+ */
+
+/**
+ * TIFF image encoder
+ * @file tiffenc.c
+ * @author Bartlomiej Wolowiec
+ */
+#include "avcodec.h"
+#ifdef CONFIG_ZLIB
+#include <zlib.h>
+#endif
+#include "bytestream.h"
+#include "tiff.h"
+#include "rle.h"
+#include "lzw.h"
+
+#define TIFF_MAX_ENTRY 32
+
+/** sizes of various TIFF field types (string size = 1)*/
+static const uint8_t type_sizes2[6] = {
+ 0, 1, 1, 2, 4, 8
+};
+
+typedef struct TiffEncoderContext {
+ AVCodecContext *avctx;
+ AVFrame picture;
+
+ int width; ///< picture width
+ int height; ///< picture height
+ unsigned int bpp; ///< bits per pixel
+ int compr; ///< compression level
+ int bpp_tab_size; ///< bpp_tab size
+ int photometric_interpretation; ///< photometric interpretation
+ int strips; ///< number of strips
+ int rps; ///< row per strip
+ uint8_t entries[TIFF_MAX_ENTRY*12]; ///< entires in header
+ int num_entries; ///< number of entires
+ uint8_t **buf; ///< actual position in buffer
+ uint8_t *buf_start; ///< pointer to first byte in buffer
+ int buf_size; ///< buffer size
+ uint16_t subsampling[2]; ///< YUV subsampling factors
+ struct LZWEncodeState *lzws; ///< LZW Encode state
+} TiffEncoderContext;
+
+
+/**
+ * Check free space in buffer
+ * @param s Tiff context
+ * @param need Needed bytes
+ * @return 0 - ok, 1 - no free space
+ */
+inline static int check_size(TiffEncoderContext * s, uint64_t need)
+{
+ if (s->buf_size < *s->buf - s->buf_start + need) {
+ *s->buf = s->buf_start + s->buf_size + 1;
+ av_log(s->avctx, AV_LOG_ERROR, "Buffer is too small\n");
+ return 1;
+ }
+ return 0;
+}
+
+/**
+ * Put n values to buffer
+ *
+ * @param p Pointer to pointer to output buffer
+ * @param n Number of values
+ * @param val Pointer to values
+ * @param type Type of values
+ * @param flip =0 - normal copy, >0 - flip
+ */
+static void tnput(uint8_t ** p, int n, const uint8_t * val, enum TiffTypes type,
+ int flip)
+{
+ int i;
+#ifdef WORDS_BIGENDIAN
+ flip ^= ((int[]) {0, 0, 0, 1, 3, 3})[type];
+#endif
+ for (i = 0; i < n * type_sizes2[type]; i++)
+ *(*p)++ = val[i ^ flip];
+}
+
+/**
+ * Add entry to directory in tiff header.
+ * @param s Tiff context
+ * @param tag Tag that identifies the entry
+ * @param type Entry type
+ * @param count The number of values
+ * @param ptr_val Pointer to values
+ */
+static void add_entry(TiffEncoderContext * s,
+ enum TiffTags tag, enum TiffTypes type, int count,
+ const void *ptr_val)
+{
+ uint8_t *entries_ptr = s->entries + 12 * s->num_entries;
+
+ assert(s->num_entries < TIFF_MAX_ENTRY);
+
+ bytestream_put_le16(&entries_ptr, tag);
+ bytestream_put_le16(&entries_ptr, type);
+ bytestream_put_le32(&entries_ptr, count);
+
+ if (type_sizes[type] * count <= 4) {
+ tnput(&entries_ptr, count, ptr_val, type, 0);
+ } else {
+ bytestream_put_le32(&entries_ptr, *s->buf - s->buf_start);
+ check_size(s, count * type_sizes2[type]);
+ tnput(s->buf, count, ptr_val, type, 0);
+ }
+
+ s->num_entries++;
+}
+
+static void add_entry1(TiffEncoderContext * s,
+ enum TiffTags tag, enum TiffTypes type, int val){
+ uint16_t w = val;
+ uint32_t dw= val;
+ add_entry(s, tag, type, 1, type == TIFF_SHORT ? (void *)&w : (void *)&dw);
+}
+
+/**
+ * Encode one strip in tiff file
+ *
+ * @param s Tiff context
+ * @param src Input buffer
+ * @param dst Output buffer
+ * @param n Size of input buffer
+ * @param compr Compression method
+ * @return Number of output bytes. If an output error is encountered, -1 returned
+ */
+static int encode_strip(TiffEncoderContext * s, const int8_t * src,
+ uint8_t * dst, int n, int compr)
+{
+
+ switch (compr) {
+#ifdef CONFIG_ZLIB
+ case TIFF_DEFLATE:
+ case TIFF_ADOBE_DEFLATE:
+ {
+ unsigned long zlen = s->buf_size - (*s->buf - s->buf_start);
+ if (compress(dst, &zlen, src, n) != Z_OK) {
+ av_log(s->avctx, AV_LOG_ERROR, "Compressing failed\n");
+ return -1;
+ }
+ return zlen;
+ }
+#endif
+ case TIFF_RAW:
+ if (check_size(s, n))
+ return -1;
+ memcpy(dst, src, n);
+ return n;
+ case TIFF_PACKBITS:
+ return ff_rle_encode(dst, s->buf_size - (*s->buf - s->buf_start), src, 1, n, 2, 0xff, -1, 0);
+ case TIFF_LZW:
+ return ff_lzw_encode(s->lzws, src, n);
+ default:
+ return -1;
+ }
+}
+
+static void pack_yuv(TiffEncoderContext * s, uint8_t * dst, int lnum)
+{
+ AVFrame *p = &s->picture;
+ int i, j, k;
+ int w = (s->width - 1) / s->subsampling[0] + 1;
+ uint8_t *pu = &p->data[1][lnum / s->subsampling[1] * p->linesize[1]];
+ uint8_t *pv = &p->data[2][lnum / s->subsampling[1] * p->linesize[2]];
+ for (i = 0; i < w; i++){
+ for (j = 0; j < s->subsampling[1]; j++)
+ for (k = 0; k < s->subsampling[0]; k++)
+ *dst++ = p->data[0][(lnum + j) * p->linesize[0] +
+ i * s->subsampling[0] + k];
+ *dst++ = *pu++;
+ *dst++ = *pv++;
+ }
+}
+
+static int encode_frame(AVCodecContext * avctx, unsigned char *buf,
+ int buf_size, void *data)
+{
+ TiffEncoderContext *s = avctx->priv_data;
+ AVFrame *pict = data;
+ AVFrame *const p = (AVFrame *) & s->picture;
+ int i;
+ int n;
+ uint8_t *ptr = buf;
+ uint8_t *offset;
+ uint32_t strips;
+ uint32_t *strip_sizes = NULL;
+ uint32_t *strip_offsets = NULL;
+ int bytes_per_row;
+ uint32_t res[2] = { 72, 1 }; // image resolution (72/1)
+ static const uint16_t bpp_tab[] = { 8, 8, 8, 8 };
+ int ret = -1;
+ int is_yuv = 0;
+ uint8_t *yuv_line = NULL;
+ int shift_h, shift_v;
+
+ s->buf_start = buf;
+ s->buf = &ptr;
+ s->buf_size = buf_size;
+
+ *p = *pict;
+ p->pict_type = FF_I_TYPE;
+ p->key_frame = 1;
+
+ s->compr = TIFF_PACKBITS;
+ if (avctx->compression_level == 0) {
+ s->compr = TIFF_RAW;
+ } else if(avctx->compression_level == 2) {
+ s->compr = TIFF_LZW;
+#ifdef CONFIG_ZLIB
+ } else if ((avctx->compression_level >= 3)) {
+ s->compr = TIFF_DEFLATE;
+#endif
+ }
+
+ s->width = avctx->width;
+ s->height = avctx->height;
+ s->subsampling[0] = 1;
+ s->subsampling[1] = 1;
+
+ switch (avctx->pix_fmt) {
+ case PIX_FMT_RGB24:
+ s->bpp = 24;
+ s->photometric_interpretation = 2;
+ break;
+ case PIX_FMT_GRAY8:
+ s->bpp = 8;
+ s->photometric_interpretation = 1;
+ break;
+ case PIX_FMT_PAL8:
+ s->bpp = 8;
+ s->photometric_interpretation = 3;
+ break;
+ case PIX_FMT_MONOBLACK:
+ s->bpp = 1;
+ s->photometric_interpretation = 1;
+ break;
+ case PIX_FMT_MONOWHITE:
+ s->bpp = 1;
+ s->photometric_interpretation = 0;
+ break;
+ case PIX_FMT_YUV420P:
+ case PIX_FMT_YUV422P:
+ case PIX_FMT_YUV444P:
+ case PIX_FMT_YUV410P:
+ case PIX_FMT_YUV411P:
+ s->photometric_interpretation = 6;
+ avcodec_get_chroma_sub_sample(avctx->pix_fmt,
+ &shift_h, &shift_v);
+ s->bpp = 8 + (16 >> (shift_h + shift_v));
+ s->subsampling[0] = 1 << shift_h;
+ s->subsampling[1] = 1 << shift_v;
+ s->bpp_tab_size = 3;
+ is_yuv = 1;
+ break;
+ default:
+ av_log(s->avctx, AV_LOG_ERROR,
+ "This colors format is not supported\n");
+ return -1;
+ }
+ if (!is_yuv)
+ s->bpp_tab_size = (s->bpp >> 3);
+
+ if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE || s->compr == TIFF_LZW)
+ //best choose for DEFLATE
+ s->rps = s->height;
+ else
+ s->rps = FFMAX(8192 / (((s->width * s->bpp) >> 3) + 1), 1); // suggest size of strip
+ s->rps = ((s->rps - 1) / s->subsampling[1] + 1) * s->subsampling[1]; // round rps up
+
+ strips = (s->height - 1) / s->rps + 1;
+
+ if (check_size(s, 8))
+ goto fail;
+
+ // write header
+ bytestream_put_le16(&ptr, 0x4949);
+ bytestream_put_le16(&ptr, 42);
+
+ offset = ptr;
+ bytestream_put_le32(&ptr, 0);
+
+ strip_sizes = av_mallocz(sizeof(*strip_sizes) * strips);
+ strip_offsets = av_mallocz(sizeof(*strip_offsets) * strips);
+
+ bytes_per_row = (((s->width - 1)/s->subsampling[0] + 1) * s->bpp
+ * s->subsampling[0] * s->subsampling[1] + 7) >> 3;
+ if (is_yuv){
+ yuv_line = av_malloc(bytes_per_row);
+ if (yuv_line == NULL){
+ av_log(s->avctx, AV_LOG_ERROR, "Not enough memory\n");
+ goto fail;
+ }
+ }
+
+#ifdef CONFIG_ZLIB
+ if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE) {
+ uint8_t *zbuf;
+ int zlen, zn;
+ int j;
+
+ zlen = bytes_per_row * s->rps;
+ zbuf = av_malloc(zlen);
+ strip_offsets[0] = ptr - buf;
+ zn = 0;
+ for (j = 0; j < s->rps; j++) {
+ if (is_yuv){
+ pack_yuv(s, yuv_line, j);
+ memcpy(zbuf + zn, yuv_line, bytes_per_row);
+ j += s->subsampling[1] - 1;
+ }
+ else
+ memcpy(zbuf + j * bytes_per_row,
+ p->data[0] + j * p->linesize[0], bytes_per_row);
+ zn += bytes_per_row;
+ }
+ n = encode_strip(s, zbuf, ptr, zn, s->compr);
+ av_free(zbuf);
+ if (n<0) {
+ av_log(s->avctx, AV_LOG_ERROR, "Encode strip failed\n");
+ goto fail;
+ }
+ ptr += n;
+ strip_sizes[0] = ptr - buf - strip_offsets[0];
+ } else
+#endif
+ {
+ if(s->compr == TIFF_LZW)
+ s->lzws = av_malloc(ff_lzw_encode_state_size);
+ for (i = 0; i < s->height; i++) {
+ if (strip_sizes[i / s->rps] == 0) {
+ if(s->compr == TIFF_LZW){
+ ff_lzw_encode_init(s->lzws, ptr, s->buf_size - (*s->buf - s->buf_start), 12);
+ }
+ strip_offsets[i / s->rps] = ptr - buf;
+ }
+ if (is_yuv){
+ pack_yuv(s, yuv_line, i);
+ n = encode_strip(s, yuv_line, ptr, bytes_per_row, s->compr);
+ i += s->subsampling[1] - 1;
+ }
+ else
+ n = encode_strip(s, p->data[0] + i * p->linesize[0],
+ ptr, bytes_per_row, s->compr);
+ if (n < 0) {
+ av_log(s->avctx, AV_LOG_ERROR, "Encode strip failed\n");
+ goto fail;
+ }
+ strip_sizes[i / s->rps] += n;
+ ptr += n;
+ if(s->compr == TIFF_LZW && (i==s->height-1 || i%s->rps == s->rps-1)){
+ int ret;
+ ret = ff_lzw_encode_flush(s->lzws);
+ strip_sizes[(i / s->rps )] += ret ;
+ ptr += ret;
+ }
+ }
+ if(s->compr == TIFF_LZW)
+ av_free(s->lzws);
+ }
+
+ s->num_entries = 0;
+
+ add_entry1(s,TIFF_SUBFILE, TIFF_LONG, 0);
+ add_entry1(s,TIFF_WIDTH, TIFF_LONG, s->width);
+ add_entry1(s,TIFF_HEIGHT, TIFF_LONG, s->height);
+
+ if (s->bpp_tab_size)
+ add_entry(s, TIFF_BPP, TIFF_SHORT, s->bpp_tab_size, bpp_tab);
+
+ add_entry1(s,TIFF_COMPR, TIFF_SHORT, s->compr);
+ add_entry1(s,TIFF_INVERT, TIFF_SHORT, s->photometric_interpretation);
+ add_entry(s, TIFF_STRIP_OFFS, TIFF_LONG, strips, strip_offsets);
+
+ if (s->bpp_tab_size)
+ add_entry1(s,TIFF_SAMPLES_PER_PIXEL, TIFF_SHORT, s->bpp_tab_size);
+
+ add_entry1(s,TIFF_ROWSPERSTRIP, TIFF_LONG, s->rps);
+ add_entry(s, TIFF_STRIP_SIZE, TIFF_LONG, strips, strip_sizes);
+ add_entry(s, TIFF_XRES, TIFF_RATIONAL, 1, res);
+ add_entry(s, TIFF_YRES, TIFF_RATIONAL, 1, res);
+ add_entry1(s,TIFF_RES_UNIT, TIFF_SHORT, 2);
+
+ if(!(avctx->flags & CODEC_FLAG_BITEXACT))
+ add_entry(s, TIFF_SOFTWARE_NAME, TIFF_STRING,
+ strlen(LIBAVCODEC_IDENT) + 1, LIBAVCODEC_IDENT);
+
+ if (avctx->pix_fmt == PIX_FMT_PAL8) {
+ 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 (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);
+ add_entry(s, TIFF_REFERENCE_BW, TIFF_RATIONAL, 6, refbw);
+ }
+ bytestream_put_le32(&offset, ptr - buf); // write offset to dir
+
+ if (check_size(s, 6 + s->num_entries * 12))
+ 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);
+
+ ret = ptr - buf;
+
+fail:
+ av_free(strip_sizes);
+ av_free(strip_offsets);
+ av_free(yuv_line);
+ return ret;
+}
+
+AVCodec tiff_encoder = {
+ "tiff",
+ CODEC_TYPE_VIDEO,
+ CODEC_ID_TIFF,
+ sizeof(TiffEncoderContext),
+ NULL,
+ encode_frame,
+ NULL,
+ NULL,
+ 0,
+ NULL,
+ .pix_fmts =
+ (enum PixelFormat[]) {PIX_FMT_RGB24, PIX_FMT_PAL8, PIX_FMT_GRAY8,
+ PIX_FMT_MONOBLACK, PIX_FMT_MONOWHITE,
+ PIX_FMT_YUV420P, PIX_FMT_YUV422P,
+ PIX_FMT_YUV444P, PIX_FMT_YUV410P,
+ PIX_FMT_YUV411P
+ -1}
+
+};
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-27 11:26:40 +0000