/* * 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 */ /** * @file * TIFF image encoder * @author Bartlomiej Wolowiec */ #include "config.h" #if CONFIG_ZLIB #include <zlib.h> #endif #include "libavutil/imgutils.h" #include "libavutil/log.h" #include "libavutil/opt.h" #include "libavutil/pixdesc.h" #include "avcodec.h" #include "bytestream.h" #include "internal.h" #include "lzw.h" #include "put_bits.h" #include "rle.h" #include "tiff.h" #define TIFF_MAX_ENTRY 32 /** sizes of various TIFF field types (string size = 1)*/ static const uint8_t type_sizes2[14] = { 0, 1, 1, 2, 4, 8, 1, 1, 2, 4, 8, 4, 8, 4 }; typedef struct TiffEncoderContext { AVClass *class; ///< for private options AVCodecContext *avctx; 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 uint32_t *strip_sizes; unsigned int strip_sizes_size; uint32_t *strip_offsets; unsigned int strip_offsets_size; uint8_t *yuv_line; unsigned int yuv_line_size; int rps; ///< row per strip uint8_t entries[TIFF_MAX_ENTRY * 12]; ///< entries in header int num_entries; ///< number of entries 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 uint32_t dpi; ///< image resolution in DPI } TiffEncoderContext; /** * Check free space in buffer. * * @param s Tiff context * @param need Needed bytes * @return 0 - ok, 1 - no free space */ static inline 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; #if HAVE_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; av_assert0(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] * (int64_t)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 * (int64_t)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 is returned */ static int encode_strip(TiffEncoderContext *s, const int8_t *src, uint8_t *dst, int n, int compr) { switch (compr) { #if 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, const AVFrame *p, uint8_t *dst, int lnum) { 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]]; if (s->width % s->subsampling[0] || s->height % s->subsampling[1]) { 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][FFMIN(lnum + j, s->height-1) * p->linesize[0] + FFMIN(i * s->subsampling[0] + k, s->width-1)]; *dst++ = *pu++; *dst++ = *pv++; } }else{ 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, AVPacket *pkt, const AVFrame *pict, int *got_packet) { const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt); TiffEncoderContext *s = avctx->priv_data; const AVFrame *const p = pict; int i; uint8_t *ptr; uint8_t *offset; uint32_t strips; int bytes_per_row; uint32_t res[2] = { s->dpi, 1 }; // image resolution (72/1) uint16_t bpp_tab[4]; int ret = -1; int is_yuv = 0, alpha = 0; int shift_h, shift_v; s->width = avctx->width; s->height = avctx->height; s->subsampling[0] = 1; s->subsampling[1] = 1; avctx->bits_per_coded_sample = s->bpp = av_get_bits_per_pixel(desc); s->bpp_tab_size = desc->nb_components; switch (avctx->pix_fmt) { case AV_PIX_FMT_RGBA64LE: case AV_PIX_FMT_RGBA: alpha = 1; case AV_PIX_FMT_RGB48LE: case AV_PIX_FMT_RGB24: s->photometric_interpretation = 2; break; case AV_PIX_FMT_GRAY8: avctx->bits_per_coded_sample = 0x28; case AV_PIX_FMT_GRAY8A: alpha = avctx->pix_fmt == AV_PIX_FMT_GRAY8A; case AV_PIX_FMT_GRAY16LE: case AV_PIX_FMT_MONOBLACK: s->photometric_interpretation = 1; break; case AV_PIX_FMT_PAL8: s->photometric_interpretation = 3; break; case AV_PIX_FMT_MONOWHITE: s->photometric_interpretation = 0; break; case AV_PIX_FMT_YUV420P: case AV_PIX_FMT_YUV422P: case AV_PIX_FMT_YUV440P: case AV_PIX_FMT_YUV444P: case AV_PIX_FMT_YUV410P: case AV_PIX_FMT_YUV411P: av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &shift_h, &shift_v); s->photometric_interpretation = 6; s->subsampling[0] = 1 << shift_h; s->subsampling[1] = 1 << shift_v; is_yuv = 1; break; default: av_log(s->avctx, AV_LOG_ERROR, "This colors format is not supported\n"); return -1; } for (i = 0; i < s->bpp_tab_size; i++) bpp_tab[i] = desc->comp[i].depth_minus1 + 1; if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE || s->compr == TIFF_LZW) // best choice for DEFLATE s->rps = s->height; else // suggest size of strip s->rps = FFMAX(8192 / (((s->width * s->bpp) >> 3) + 1), 1); // round rps up s->rps = ((s->rps - 1) / s->subsampling[1] + 1) * s->subsampling[1]; strips = (s->height - 1) / s->rps + 1; if ((ret = ff_alloc_packet2(avctx, pkt, avctx->width * avctx->height * s->bpp * 2 + avctx->height * 4 + FF_MIN_BUFFER_SIZE)) < 0) return ret; ptr = pkt->data; s->buf_start = pkt->data; s->buf = &ptr; s->buf_size = pkt->size; 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); av_fast_padded_mallocz(&s->strip_sizes , &s->strip_sizes_size , sizeof(s->strip_sizes [0]) * strips); av_fast_padded_mallocz(&s->strip_offsets, &s->strip_offsets_size, sizeof(s->strip_offsets[0]) * strips); if (!s->strip_sizes || !s->strip_offsets) { ret = AVERROR(ENOMEM); goto fail; } bytes_per_row = (((s->width - 1) / s->subsampling[0] + 1) * s->bpp * s->subsampling[0] * s->subsampling[1] + 7) >> 3; if (is_yuv) { av_fast_padded_malloc(&s->yuv_line, &s->yuv_line_size, bytes_per_row); if (s->yuv_line == NULL) { av_log(s->avctx, AV_LOG_ERROR, "Not enough memory\n"); ret = AVERROR(ENOMEM); goto fail; } } #if 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); if (!zbuf) { ret = AVERROR(ENOMEM); goto fail; } s->strip_offsets[0] = ptr - pkt->data; zn = 0; for (j = 0; j < s->rps; j++) { if (is_yuv) { pack_yuv(s, p, s->yuv_line, j); memcpy(zbuf + zn, s->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; } ret = encode_strip(s, zbuf, ptr, zn, s->compr); av_free(zbuf); if (ret < 0) { av_log(s->avctx, AV_LOG_ERROR, "Encode strip failed\n"); goto fail; } ptr += ret; s->strip_sizes[0] = ptr - pkt->data - s->strip_offsets[0]; } else #endif { if (s->compr == TIFF_LZW) { s->lzws = av_malloc(ff_lzw_encode_state_size); if (!s->lzws) { ret = AVERROR(ENOMEM); goto fail; } } for (i = 0; i < s->height; i++) { if (s->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, FF_LZW_TIFF, put_bits); } s->strip_offsets[i / s->rps] = ptr - pkt->data; } if (is_yuv) { pack_yuv(s, p, s->yuv_line, i); ret = encode_strip(s, s->yuv_line, ptr, bytes_per_row, s->compr); i += s->subsampling[1] - 1; } else ret = encode_strip(s, p->data[0] + i * p->linesize[0], ptr, bytes_per_row, s->compr); if (ret < 0) { av_log(s->avctx, AV_LOG_ERROR, "Encode strip failed\n"); goto fail; } s->strip_sizes[i / s->rps] += ret; ptr += ret; if (s->compr == TIFF_LZW && (i == s->height - 1 || i % s->rps == s->rps - 1)) { ret = ff_lzw_encode_flush(s->lzws, flush_put_bits); s->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, s->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, s->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 == AV_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 (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, };