diff options
author | Michael Niedermayer <michaelni@gmx.at> | 2007-04-03 17:43:57 +0400 |
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committer | Michael Niedermayer <michaelni@gmx.at> | 2007-04-03 17:43:57 +0400 |
commit | 716222db17905c0d069476451b680cd9070a07be (patch) | |
tree | da568e1971484a67835d4c2217efe4e344528f81 /libavcodec/tiffenc.c | |
parent | 1a2a5b3ecdff0472ee402e494bc8d2ee33ecbcd2 (diff) |
tiff encoder by (Bartlomiej Wolowiec b.wolowiec students mimuw edu pl)
Originally committed as revision 8608 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/tiffenc.c')
-rw-r--r-- | libavcodec/tiffenc.c | 359 |
1 files changed, 359 insertions, 0 deletions
diff --git a/libavcodec/tiffenc.c b/libavcodec/tiffenc.c new file mode 100644 index 0000000000..f9a086fcfa --- /dev/null +++ b/libavcodec/tiffenc.c @@ -0,0 +1,359 @@ +/* + * 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 + * + */ + +#include "avcodec.h" +#ifdef CONFIG_ZLIB +#include <zlib.h> +#endif +#include "bytestream.h" +#include "tiff.h" +#include "rle.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 invert; ///< 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 +} 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++; +} + +/** + * 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); + default: + return -1; + } +} + +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; + + 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; +#ifdef CONFIG_ZLIB + } else if ((avctx->compression_level > 2)) { + s->compr = TIFF_DEFLATE; +#endif + } + + s->width = avctx->width; + s->height = avctx->height; + + switch (avctx->pix_fmt) { + case PIX_FMT_RGB24: + s->bpp = 24; + s->invert = 2; + break; + case PIX_FMT_GRAY8: + s->bpp = 8; + s->invert = 1; + break; + case PIX_FMT_PAL8: + s->bpp = 8; + s->invert = 3; + break; + case PIX_FMT_MONOBLACK: + s->bpp = 1; + s->invert = 1; + break; + case PIX_FMT_MONOWHITE: + s->bpp = 1; + s->invert = 0; + break; + default: + av_log(s->avctx, AV_LOG_ERROR, + "This colors format is not supported\n"); + return -1; + } + s->bpp_tab_size = (s->bpp >> 3); + + if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE) + //best choose for DEFLATE + s->rps = s->height; + else + s->rps = FFMAX(8192 / (((s->width * s->bpp) >> 3) + 1), 1); // suggest size of strip + + 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 * s->bpp + 7) >> 3; + +#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++) { + 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 + { + for (i = 0; i < s->height; i++) { + if (strip_sizes[i / s->rps] == 0) { + strip_offsets[i / s->rps] = ptr - buf; + } + if ((n = encode_strip(s, p->data[0] + i * p->linesize[0] + , ptr, bytes_per_row, s->compr)) < 0) { + av_log(s->avctx, AV_LOG_ERROR, "Encode strip failed\n"); + goto fail; + } + strip_sizes[i / s->rps] += n; + ptr += n; + } + } + + s->num_entries = 0; + + add_entry(s, TIFF_SUBFILE, TIFF_LONG, 1, (uint32_t[]) {0}); + add_entry(s, TIFF_WIDTH, TIFF_LONG, 1, (uint32_t[]) {s->width}); + add_entry(s, TIFF_HEIGHT, TIFF_LONG, 1, (uint32_t[]) {s->height}); + + if (s->bpp_tab_size) + add_entry(s, TIFF_BPP, TIFF_SHORT, s->bpp_tab_size, bpp_tab); + + add_entry(s, TIFF_COMPR, TIFF_SHORT, 1, (uint16_t[]) {s->compr}); + add_entry(s, TIFF_INVERT, TIFF_SHORT, 1, (uint16_t[]) {s->invert}); + add_entry(s, TIFF_STRIP_OFFS, TIFF_LONG, strips, strip_offsets); + + if (s->bpp_tab_size) + add_entry(s, TIFF_SAMPLES_PER_PIXEL, TIFF_SHORT, 1, (uint16_t[]) {s->bpp_tab_size}); + + add_entry(s, TIFF_ROWSPERSTRIP, TIFF_LONG, 1, (uint32_t[]) {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_entry(s, TIFF_RES_UNIT, TIFF_SHORT, 1, (uint16_t[]) {2}); + 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); + } + 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); + 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, + -1} + +}; |