FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/tiffenc.c	Lines:	130	265	49.1 %
Date:	2021-01-20 23:14:43	Branches:	56	172	32.6 %


/*
 * 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
    enum TiffPhotometric 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 int 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);
        if (check_size(s, count * (int64_t)type_sizes2[type]))
            return AVERROR_INVALIDDATA;
        tnput(s->buf, count, ptr_val, type, 0);
    }

    s->num_entries++;
    return 0;
}

static int add_entry1(TiffEncoderContext *s,
                      enum TiffTags tag, enum TiffTypes type, int val)
{
    uint16_t w  = val;
    uint32_t dw = val;
    return 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, a negative
 * value corresponding to an AVERROR error code 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 AVERROR_EXTERNAL;
        }
        return zlen;
    }
#endif
    case TIFF_RAW:
        if (check_size(s, n))
            return AVERROR(EINVAL);
        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:
        av_log(s->avctx, AV_LOG_ERROR, "Unsupported compression method: %d\n",
               compr);
        return AVERROR(EINVAL);
    }
}

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++;
        }
    }
}

#define ADD_ENTRY(s, tag, type, count, ptr_val)         \
    do {                                                \
        ret = add_entry(s, tag, type, count, ptr_val);  \
        if (ret < 0)                                    \
            goto fail;                                  \
    } while (0)

#define ADD_ENTRY1(s, tag, type, val)           \
    do {                                        \
        ret = add_entry1(s, tag, type, val);    \
        if (ret < 0)                            \
            goto fail;                          \
    } while (0)

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 = 0;
    int is_yuv = 0, alpha = 0;
    int shift_h, shift_v;
    int packet_size;

    s->width          = avctx->width;
    s->height         = avctx->height;
    s->subsampling[0] = 1;
    s->subsampling[1] = 1;

    if (!desc)
        return AVERROR(EINVAL);

    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 = TIFF_PHOTOMETRIC_RGB;
        break;
    case AV_PIX_FMT_GRAY8:
        avctx->bits_per_coded_sample = 0x28;
    case AV_PIX_FMT_GRAY8A:
    case AV_PIX_FMT_YA16LE:
        alpha = avctx->pix_fmt == AV_PIX_FMT_GRAY8A || avctx->pix_fmt == AV_PIX_FMT_YA16LE;
    case AV_PIX_FMT_GRAY16LE:
    case AV_PIX_FMT_MONOBLACK:
        s->photometric_interpretation = TIFF_PHOTOMETRIC_BLACK_IS_ZERO;
        break;
    case AV_PIX_FMT_PAL8:
        s->photometric_interpretation = TIFF_PHOTOMETRIC_PALETTE;
        break;
    case AV_PIX_FMT_MONOWHITE:
        s->photometric_interpretation = TIFF_PHOTOMETRIC_WHITE_IS_ZERO;
        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 = TIFF_PHOTOMETRIC_YCBCR;
        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 AVERROR(EINVAL);
    }

    for (i = 0; i < s->bpp_tab_size; i++)
        bpp_tab[i] = desc->comp[i].depth;

    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;

    bytes_per_row = (((s->width - 1) / s->subsampling[0] + 1) * s->bpp *
                     s->subsampling[0] * s->subsampling[1] + 7) >> 3;
    packet_size = avctx->height * bytes_per_row * 2 +
                  avctx->height * 4 + AV_INPUT_BUFFER_MIN_SIZE;

    if ((ret = ff_alloc_packet2(avctx, pkt, packet_size, 0)) < 0)
        return ret;
    ptr          = pkt->data;
    s->buf_start = pkt->data;
    s->buf       = &ptr;
    s->buf_size  = pkt->size;

    if (check_size(s, 8)) {
        ret = AVERROR(EINVAL);
        goto fail;
    }

    // write header
    bytestream_put_le16(&ptr, 0x4949);
    bytestream_put_le16(&ptr, 42);

    offset = ptr;
    bytestream_put_le32(&ptr, 0);

    if (strips > INT_MAX / FFMAX(sizeof(s->strip_sizes[0]), sizeof(s->strip_offsets[0]))) {
        ret = AVERROR(ENOMEM);
        goto fail;
    }
    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;
    }

    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, 0);
            }
            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);
            s->strip_sizes[(i / s->rps)] += ret;
            ptr                          += ret;
        }
    }
    if (s->compr == TIFF_LZW)
        av_freep(&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_PHOTOMETRIC, 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);
    if (avctx->sample_aspect_ratio.num > 0 &&
        avctx->sample_aspect_ratio.den > 0) {
        AVRational y = av_mul_q(av_make_q(s->dpi, 1),
                                avctx->sample_aspect_ratio);
        res[0] = y.num;
        res[1] = y.den;
    }
    ADD_ENTRY(s,  TIFF_YRES,         TIFF_RATIONAL, 1,      res);
    ADD_ENTRY1(s, TIFF_RES_UNIT,     TIFF_SHORT,    2);

    if (!(avctx->flags & AV_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;

#if !CONFIG_ZLIB
    if (s->compr == TIFF_DEFLATE) {
        av_log(avctx, AV_LOG_ERROR,
               "Deflate compression needs zlib compiled in\n");
        return AVERROR(ENOSYS);
    }
#endif

#if FF_API_CODED_FRAME
FF_DISABLE_DEPRECATION_WARNINGS
    avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
    avctx->coded_frame->key_frame = 1;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
    s->avctx = avctx;

    return 0;
}

static av_cold int encode_close(AVCodecContext *avctx)
{
    TiffEncoderContext *s = avctx->priv_data;

    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" },
    { "deflate",          NULL, 0,             AV_OPT_TYPE_CONST, { .i64 = TIFF_DEFLATE  }, 0,        0,            VE, "compression_algo" },
    { 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,
    .capabilities   = AV_CODEC_CAP_FRAME_THREADS,
    .encode2        = encode_frame,
    .pix_fmts       = (const enum AVPixelFormat[]) {
        AV_PIX_FMT_RGB24, AV_PIX_FMT_RGB48LE, AV_PIX_FMT_PAL8,
        AV_PIX_FMT_RGBA, AV_PIX_FMT_RGBA64LE,
        AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY8A, AV_PIX_FMT_GRAY16LE, AV_PIX_FMT_YA16LE,
        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_NONE
    },
    .priv_class     = &tiffenc_class,
};


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			/*
2			* TIFF image encoder
3			* Copyright (c) 2007 Bartlomiej Wolowiec
4			*
5			* This file is part of FFmpeg.
6			*
7			* FFmpeg is free software; you can redistribute it and/or
8			* modify it under the terms of the GNU Lesser General Public
9			* License as published by the Free Software Foundation; either
10			* version 2.1 of the License, or (at your option) any later version.
11			*
12			* FFmpeg is distributed in the hope that it will be useful,
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15			* Lesser General Public License for more details.
16			*
17			* You should have received a copy of the GNU Lesser General Public
18			* License along with FFmpeg; if not, write to the Free Software
19			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20			*/
21
22			/**
23			* @file
24			* TIFF image encoder
25			* @author Bartlomiej Wolowiec
26			*/
27
28			#include "config.h"
29			#if CONFIG_ZLIB
30			#include <zlib.h>
31			#endif
32
33			#include "libavutil/imgutils.h"
34			#include "libavutil/log.h"
35			#include "libavutil/opt.h"
36			#include "libavutil/pixdesc.h"
37			#include "avcodec.h"
38			#include "bytestream.h"
39			#include "internal.h"
40			#include "lzw.h"
41			#include "put_bits.h"
42			#include "rle.h"
43			#include "tiff.h"
44
45			#define TIFF_MAX_ENTRY 32
46
47			/** sizes of various TIFF field types (string size = 1)*/
48			static const uint8_t type_sizes2[14] = {
49			0, 1, 1, 2, 4, 8, 1, 1, 2, 4, 8, 4, 8, 4
50			};
51
52			typedef struct TiffEncoderContext {
53			AVClass *class; ///< for private options
54			AVCodecContext *avctx;
55
56			int width; ///< picture width
57			int height; ///< picture height
58			unsigned int bpp; ///< bits per pixel
59			int compr; ///< compression level
60			int bpp_tab_size; ///< bpp_tab size
61			enum TiffPhotometric photometric_interpretation; ///< photometric interpretation
62			int strips; ///< number of strips
63			uint32_t *strip_sizes;
64			unsigned int strip_sizes_size;
65			uint32_t *strip_offsets;
66			unsigned int strip_offsets_size;
67			uint8_t *yuv_line;
68			unsigned int yuv_line_size;
69			int rps; ///< row per strip
70			uint8_t entries[TIFF_MAX_ENTRY * 12]; ///< entries in header
71			int num_entries; ///< number of entries
72			uint8_t **buf; ///< actual position in buffer
73			uint8_t *buf_start; ///< pointer to first byte in buffer
74			int buf_size; ///< buffer size
75			uint16_t subsampling[2]; ///< YUV subsampling factors
76			struct LZWEncodeState *lzws; ///< LZW encode state
77			uint32_t dpi; ///< image resolution in DPI
78			} TiffEncoderContext;
79
80			/**
81			* Check free space in buffer.
82			*
83			* @param s Tiff context
84			* @param need Needed bytes
85			* @return 0 - ok, 1 - no free space
86			*/
87		91	static inline int check_size(TiffEncoderContext *s, uint64_t need)
88			{
89	✗✓	91	if (s->buf_size < *s->buf - s->buf_start + need) {
90			*s->buf = s->buf_start + s->buf_size + 1;
91			av_log(s->avctx, AV_LOG_ERROR, "Buffer is too small\n");
92			return 1;
93			}
94		91	return 0;
95			}
96
97			/**
98			* Put n values to buffer.
99			*
100			* @param p pointer to pointer to output buffer
101			* @param n number of values
102			* @param val pointer to values
103			* @param type type of values
104			* @param flip = 0 - normal copy, >0 - flip
105			*/
106		169	static void tnput(uint8_t *p, int n, const uint8_t val, enum TiffTypes type,
107			int flip)
108			{
109			int i;
110			#if HAVE_BIGENDIAN
111			flip ^= ((int[]) { 0, 0, 0, 1, 3, 3 })[type];
112			#endif
113	✓✓	5135	for (i = 0; i < n * type_sizes2[type]; i++)
114		4966	(p)++ = val[i ^ flip];
115		169	}
116
117			/**
118			* Add entry to directory in tiff header.
119			*
120			* @param s Tiff context
121			* @param tag tag that identifies the entry
122			* @param type entry type
123			* @param count the number of values
124			* @param ptr_val pointer to values
125			*/
126		169	static int add_entry(TiffEncoderContext *s, enum TiffTags tag,
127			enum TiffTypes type, int count, const void *ptr_val)
128			{
129		169	uint8_t entries_ptr = s->entries + 12 s->num_entries;
130
131	✗✓	169	av_assert0(s->num_entries < TIFF_MAX_ENTRY);
132
133		169	bytestream_put_le16(&entries_ptr, tag);
134		169	bytestream_put_le16(&entries_ptr, type);
135		169	bytestream_put_le32(&entries_ptr, count);
136
137	✓✓	169	if (type_sizes[type] * (int64_t)count <= 4) {
138		104	tnput(&entries_ptr, count, ptr_val, type, 0);
139			} else {
140		65	bytestream_put_le32(&entries_ptr, *s->buf - s->buf_start);
141	✗✓	65	if (check_size(s, count * (int64_t)type_sizes2[type]))
142			return AVERROR_INVALIDDATA;
143		65	tnput(s->buf, count, ptr_val, type, 0);
144			}
145
146		169	s->num_entries++;
147		169	return 0;
148			}
149
150		104	static int add_entry1(TiffEncoderContext *s,
151			enum TiffTags tag, enum TiffTypes type, int val)
152			{
153		104	uint16_t w = val;
154		104	uint32_t dw = val;
155	✓✓	104	return add_entry(s, tag, type, 1,
156			type == TIFF_SHORT ? (void )&w : (void )&dw);
157			}
158
159			/**
160			* Encode one strip in tiff file.
161			*
162			* @param s Tiff context
163			* @param src input buffer
164			* @param dst output buffer
165			* @param n size of input buffer
166			* @param compr compression method
167			* @return number of output bytes. If an output error is encountered, a negative
168			* value corresponding to an AVERROR error code is returned.
169			*/
170		3744	static int encode_strip(TiffEncoderContext s, const int8_t src,
171			uint8_t *dst, int n, int compr)
172			{
173	✗✗✓✗ ✗	3744	switch (compr) {
174			#if CONFIG_ZLIB
175			case TIFF_DEFLATE:
176			case TIFF_ADOBE_DEFLATE:
177			{
178			unsigned long zlen = s->buf_size - (*s->buf - s->buf_start);
179			if (compress(dst, &zlen, src, n) != Z_OK) {
180			av_log(s->avctx, AV_LOG_ERROR, "Compressing failed\n");
181			return AVERROR_EXTERNAL;
182			}
183			return zlen;
184			}
185			#endif
186			case TIFF_RAW:
187			if (check_size(s, n))
188			return AVERROR(EINVAL);
189			memcpy(dst, src, n);
190			return n;
191		3744	case TIFF_PACKBITS:
192		3744	return ff_rle_encode(dst, s->buf_size - (*s->buf - s->buf_start),
193			src, 1, n, 2, 0xff, -1, 0);
194			case TIFF_LZW:
195			return ff_lzw_encode(s->lzws, src, n);
196			default:
197			av_log(s->avctx, AV_LOG_ERROR, "Unsupported compression method: %d\n",
198			compr);
199			return AVERROR(EINVAL);
200			}
201			}
202
203			static void pack_yuv(TiffEncoderContext s, const AVFrame p,
204			uint8_t *dst, int lnum)
205			{
206			int i, j, k;
207			int w = (s->width - 1) / s->subsampling[0] + 1;
208			uint8_t pu = &p->data[1][lnum / s->subsampling[1] p->linesize[1]];
209			uint8_t pv = &p->data[2][lnum / s->subsampling[1] p->linesize[2]];
210			if (s->width % s->subsampling[0] \|\| s->height % s->subsampling[1]) {
211			for (i = 0; i < w; i++) {
212			for (j = 0; j < s->subsampling[1]; j++)
213			for (k = 0; k < s->subsampling[0]; k++)
214			dst++ = p->data[0][FFMIN(lnum + j, s->height-1) p->linesize[0] +
215			FFMIN(i * s->subsampling[0] + k, s->width-1)];
216			dst++ = pu++;
217			dst++ = pv++;
218			}
219			}else{
220			for (i = 0; i < w; i++) {
221			for (j = 0; j < s->subsampling[1]; j++)
222			for (k = 0; k < s->subsampling[0]; k++)
223			dst++ = p->data[0][(lnum + j) p->linesize[0] +
224			i * s->subsampling[0] + k];
225			dst++ = pu++;
226			dst++ = pv++;
227			}
228			}
229			}
230
231			#define ADD_ENTRY(s, tag, type, count, ptr_val) \
232			do { \
233			ret = add_entry(s, tag, type, count, ptr_val); \
234			if (ret < 0) \
235			goto fail; \
236			} while (0)
237
238			#define ADD_ENTRY1(s, tag, type, val) \
239			do { \
240			ret = add_entry1(s, tag, type, val); \
241			if (ret < 0) \
242			goto fail; \
243			} while (0)
244
245		13	static int encode_frame(AVCodecContext avctx, AVPacket pkt,
246			const AVFrame pict, int got_packet)
247			{
248		13	const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
249		13	TiffEncoderContext *s = avctx->priv_data;
250		13	const AVFrame *const p = pict;
251			int i;
252			uint8_t *ptr;
253			uint8_t *offset;
254			uint32_t strips;
255			int bytes_per_row;
256		13	uint32_t res[2] = { s->dpi, 1 }; // image resolution (72/1)
257			uint16_t bpp_tab[4];
258		13	int ret = 0;
259		13	int is_yuv = 0, alpha = 0;
260			int shift_h, shift_v;
261			int packet_size;
262
263		13	s->width = avctx->width;
264		13	s->height = avctx->height;
265		13	s->subsampling[0] = 1;
266		13	s->subsampling[1] = 1;
267
268	✗✓	13	if (!desc)
269			return AVERROR(EINVAL);
270
271		13	avctx->bits_per_coded_sample =
272		13	s->bpp = av_get_bits_per_pixel(desc);
273		13	s->bpp_tab_size = desc->nb_components;
274
275	✗✓✗✗ ✗✗✗✗ ✗	13	switch (avctx->pix_fmt) {
276			case AV_PIX_FMT_RGBA64LE:
277			case AV_PIX_FMT_RGBA:
278			alpha = 1;
279		13	case AV_PIX_FMT_RGB48LE:
280			case AV_PIX_FMT_RGB24:
281		13	s->photometric_interpretation = TIFF_PHOTOMETRIC_RGB;
282		13	break;
283			case AV_PIX_FMT_GRAY8:
284			avctx->bits_per_coded_sample = 0x28;
285			case AV_PIX_FMT_GRAY8A:
286			case AV_PIX_FMT_YA16LE:
287			alpha = avctx->pix_fmt == AV_PIX_FMT_GRAY8A \|\| avctx->pix_fmt == AV_PIX_FMT_YA16LE;
288			case AV_PIX_FMT_GRAY16LE:
289			case AV_PIX_FMT_MONOBLACK:
290			s->photometric_interpretation = TIFF_PHOTOMETRIC_BLACK_IS_ZERO;
291			break;
292			case AV_PIX_FMT_PAL8:
293			s->photometric_interpretation = TIFF_PHOTOMETRIC_PALETTE;
294			break;
295			case AV_PIX_FMT_MONOWHITE:
296			s->photometric_interpretation = TIFF_PHOTOMETRIC_WHITE_IS_ZERO;
297			break;
298			case AV_PIX_FMT_YUV420P:
299			case AV_PIX_FMT_YUV422P:
300			case AV_PIX_FMT_YUV440P:
301			case AV_PIX_FMT_YUV444P:
302			case AV_PIX_FMT_YUV410P:
303			case AV_PIX_FMT_YUV411P:
304			av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &shift_h, &shift_v);
305			s->photometric_interpretation = TIFF_PHOTOMETRIC_YCBCR;
306			s->subsampling[0] = 1 << shift_h;
307			s->subsampling[1] = 1 << shift_v;
308			is_yuv = 1;
309			break;
310			default:
311			av_log(s->avctx, AV_LOG_ERROR,
312			"This colors format is not supported\n");
313			return AVERROR(EINVAL);
314			}
315
316	✓✓	52	for (i = 0; i < s->bpp_tab_size; i++)
317		39	bpp_tab[i] = desc->comp[i].depth;
318
319	✓✗	13	if (s->compr == TIFF_DEFLATE \|\|
320	✓✗	13	s->compr == TIFF_ADOBE_DEFLATE \|\|
321	✗✓	13	s->compr == TIFF_LZW)
322			// best choice for DEFLATE
323			s->rps = s->height;
324			else
325			// suggest size of strip
326		13	s->rps = FFMAX(8192 / (((s->width * s->bpp) >> 3) + 1), 1);
327			// round rps up
328		13	s->rps = ((s->rps - 1) / s->subsampling[1] + 1) * s->subsampling[1];
329
330		13	strips = (s->height - 1) / s->rps + 1;
331
332		13	bytes_per_row = (((s->width - 1) / s->subsampling[0] + 1) * s->bpp *
333		13	s->subsampling[0] * s->subsampling[1] + 7) >> 3;
334		13	packet_size = avctx->height * bytes_per_row * 2 +
335		13	avctx->height * 4 + AV_INPUT_BUFFER_MIN_SIZE;
336
337	✗✓	13	if ((ret = ff_alloc_packet2(avctx, pkt, packet_size, 0)) < 0)
338			return ret;
339		13	ptr = pkt->data;
340		13	s->buf_start = pkt->data;
341		13	s->buf = &ptr;
342		13	s->buf_size = pkt->size;
343
344	✗✓	13	if (check_size(s, 8)) {
345			ret = AVERROR(EINVAL);
346			goto fail;
347			}
348
349			// write header
350		13	bytestream_put_le16(&ptr, 0x4949);
351		13	bytestream_put_le16(&ptr, 42);
352
353		13	offset = ptr;
354		13	bytestream_put_le32(&ptr, 0);
355
356	✗✓	13	if (strips > INT_MAX / FFMAX(sizeof(s->strip_sizes[0]), sizeof(s->strip_offsets[0]))) {
357			ret = AVERROR(ENOMEM);
358			goto fail;
359			}
360		13	av_fast_padded_mallocz(&s->strip_sizes , &s->strip_sizes_size , sizeof(s->strip_sizes [0]) * strips);
361		13	av_fast_padded_mallocz(&s->strip_offsets, &s->strip_offsets_size, sizeof(s->strip_offsets[0]) * strips);
362
363	✓✗✗✓	13	if (!s->strip_sizes \|\| !s->strip_offsets) {
364			ret = AVERROR(ENOMEM);
365			goto fail;
366			}
367
368	✗✓	13	if (is_yuv) {
369			av_fast_padded_malloc(&s->yuv_line, &s->yuv_line_size, bytes_per_row);
370			if (s->yuv_line == NULL) {
371			av_log(s->avctx, AV_LOG_ERROR, "Not enough memory\n");
372			ret = AVERROR(ENOMEM);
373			goto fail;
374			}
375			}
376
377			#if CONFIG_ZLIB
378	✓✗✗✓	13	if (s->compr == TIFF_DEFLATE \|\| s->compr == TIFF_ADOBE_DEFLATE) {
379			uint8_t *zbuf;
380			int zlen, zn;
381			int j;
382
383			zlen = bytes_per_row * s->rps;
384			zbuf = av_malloc(zlen);
385			if (!zbuf) {
386			ret = AVERROR(ENOMEM);
387			goto fail;
388			}
389			s->strip_offsets[0] = ptr - pkt->data;
390			zn = 0;
391			for (j = 0; j < s->rps; j++) {
392			if (is_yuv) {
393			pack_yuv(s, p, s->yuv_line, j);
394			memcpy(zbuf + zn, s->yuv_line, bytes_per_row);
395			j += s->subsampling[1] - 1;
396			} else
397			memcpy(zbuf + j * bytes_per_row,
398			p->data[0] + j * p->linesize[0], bytes_per_row);
399			zn += bytes_per_row;
400			}
401			ret = encode_strip(s, zbuf, ptr, zn, s->compr);
402			av_free(zbuf);
403			if (ret < 0) {
404			av_log(s->avctx, AV_LOG_ERROR, "Encode strip failed\n");
405			goto fail;
406			}
407			ptr += ret;
408			s->strip_sizes[0] = ptr - pkt->data - s->strip_offsets[0];
409			} else
410			#endif
411			{
412	✗✓	13	if (s->compr == TIFF_LZW) {
413			s->lzws = av_malloc(ff_lzw_encode_state_size);
414			if (!s->lzws) {
415			ret = AVERROR(ENOMEM);
416			goto fail;
417			}
418			}
419	✓✓	3757	for (i = 0; i < s->height; i++) {
420	✓✓	3744	if (s->strip_sizes[i / s->rps] == 0) {
421	✗✓	546	if (s->compr == TIFF_LZW) {
422			ff_lzw_encode_init(s->lzws, ptr,
423			s->buf_size - (*s->buf - s->buf_start),
424			12, FF_LZW_TIFF, 0);
425			}
426		546	s->strip_offsets[i / s->rps] = ptr - pkt->data;
427			}
428	✗✓	3744	if (is_yuv) {
429			pack_yuv(s, p, s->yuv_line, i);
430			ret = encode_strip(s, s->yuv_line, ptr, bytes_per_row, s->compr);
431			i += s->subsampling[1] - 1;
432			} else
433		3744	ret = encode_strip(s, p->data[0] + i * p->linesize[0],
434			ptr, bytes_per_row, s->compr);
435	✗✓	3744	if (ret < 0) {
436			av_log(s->avctx, AV_LOG_ERROR, "Encode strip failed\n");
437			goto fail;
438			}
439		3744	s->strip_sizes[i / s->rps] += ret;
440		3744	ptr += ret;
441	✗✓	3744	if (s->compr == TIFF_LZW &&
442			(i == s->height - 1 \|\| i % s->rps == s->rps - 1)) {
443			ret = ff_lzw_encode_flush(s->lzws);
444			s->strip_sizes[(i / s->rps)] += ret;
445			ptr += ret;
446			}
447			}
448	✗✓	13	if (s->compr == TIFF_LZW)
449			av_freep(&s->lzws);
450			}
451
452		13	s->num_entries = 0;
453
454	✗✓	13	ADD_ENTRY1(s, TIFF_SUBFILE, TIFF_LONG, 0);
455	✗✓	13	ADD_ENTRY1(s, TIFF_WIDTH, TIFF_LONG, s->width);
456	✗✓	13	ADD_ENTRY1(s, TIFF_HEIGHT, TIFF_LONG, s->height);
457
458	✓✗	13	if (s->bpp_tab_size)
459	✗✓	13	ADD_ENTRY(s, TIFF_BPP, TIFF_SHORT, s->bpp_tab_size, bpp_tab);
460
461	✗✓	13	ADD_ENTRY1(s, TIFF_COMPR, TIFF_SHORT, s->compr);
462	✗✓	13	ADD_ENTRY1(s, TIFF_PHOTOMETRIC, TIFF_SHORT, s->photometric_interpretation);
463	✗✓	13	ADD_ENTRY(s, TIFF_STRIP_OFFS, TIFF_LONG, strips, s->strip_offsets);
464
465	✓✗	13	if (s->bpp_tab_size)
466	✗✓	13	ADD_ENTRY1(s, TIFF_SAMPLES_PER_PIXEL, TIFF_SHORT, s->bpp_tab_size);
467
468	✗✓	13	ADD_ENTRY1(s, TIFF_ROWSPERSTRIP, TIFF_LONG, s->rps);
469	✗✓	13	ADD_ENTRY(s, TIFF_STRIP_SIZE, TIFF_LONG, strips, s->strip_sizes);
470	✗✓	13	ADD_ENTRY(s, TIFF_XRES, TIFF_RATIONAL, 1, res);
471	✗✓	13	if (avctx->sample_aspect_ratio.num > 0 &&
472			avctx->sample_aspect_ratio.den > 0) {
473			AVRational y = av_mul_q(av_make_q(s->dpi, 1),
474			avctx->sample_aspect_ratio);
475			res[0] = y.num;
476			res[1] = y.den;
477			}
478	✗✓	13	ADD_ENTRY(s, TIFF_YRES, TIFF_RATIONAL, 1, res);
479	✗✓	13	ADD_ENTRY1(s, TIFF_RES_UNIT, TIFF_SHORT, 2);
480
481	✗✓	13	if (!(avctx->flags & AV_CODEC_FLAG_BITEXACT))
482			ADD_ENTRY(s, TIFF_SOFTWARE_NAME, TIFF_STRING,
483			strlen(LIBAVCODEC_IDENT) + 1, LIBAVCODEC_IDENT);
484
485	✗✓	13	if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
486			uint16_t pal[256 * 3];
487			for (i = 0; i < 256; i++) {
488			uint32_t rgb = (uint32_t ) (p->data[1] + i * 4);
489			pal[i] = ((rgb >> 16) & 0xff) * 257;
490			pal[i + 256] = ((rgb >> 8) & 0xff) * 257;
491			pal[i + 512] = (rgb & 0xff) * 257;
492			}
493			ADD_ENTRY(s, TIFF_PAL, TIFF_SHORT, 256 * 3, pal);
494			}
495	✗✓	13	if (alpha)
496			ADD_ENTRY1(s,TIFF_EXTRASAMPLES, TIFF_SHORT, 2);
497	✗✓	13	if (is_yuv) {
498			/** according to CCIR Recommendation 601.1 */
499			uint32_t refbw[12] = { 15, 1, 235, 1, 128, 1, 240, 1, 128, 1, 240, 1 };
500			ADD_ENTRY(s, TIFF_YCBCR_SUBSAMPLING, TIFF_SHORT, 2, s->subsampling);
501			if (avctx->chroma_sample_location == AVCHROMA_LOC_TOPLEFT)
502			ADD_ENTRY1(s, TIFF_YCBCR_POSITIONING, TIFF_SHORT, 2);
503			ADD_ENTRY(s, TIFF_REFERENCE_BW, TIFF_RATIONAL, 6, refbw);
504			}
505			// write offset to dir
506		13	bytestream_put_le32(&offset, ptr - pkt->data);
507
508	✗✓	13	if (check_size(s, 6 + s->num_entries * 12)) {
509			ret = AVERROR(EINVAL);
510			goto fail;
511			}
512		13	bytestream_put_le16(&ptr, s->num_entries); // write tag count
513		13	bytestream_put_buffer(&ptr, s->entries, s->num_entries * 12);
514		13	bytestream_put_le32(&ptr, 0);
515
516		13	pkt->size = ptr - pkt->data;
517		13	pkt->flags \|= AV_PKT_FLAG_KEY;
518		13	*got_packet = 1;
519
520		13	fail:
521		13	return ret < 0 ? ret : 0;
522			}
523
524		1	static av_cold int encode_init(AVCodecContext *avctx)
525			{
526		1	TiffEncoderContext *s = avctx->priv_data;
527
528			#if !CONFIG_ZLIB
529			if (s->compr == TIFF_DEFLATE) {
530			av_log(avctx, AV_LOG_ERROR,
531			"Deflate compression needs zlib compiled in\n");
532			return AVERROR(ENOSYS);
533			}
534			#endif
535
536			#if FF_API_CODED_FRAME
537			FF_DISABLE_DEPRECATION_WARNINGS
538		1	avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
539		1	avctx->coded_frame->key_frame = 1;
540			FF_ENABLE_DEPRECATION_WARNINGS
541			#endif
542		1	s->avctx = avctx;
543
544		1	return 0;
545			}
546
547		1	static av_cold int encode_close(AVCodecContext *avctx)
548			{
549		1	TiffEncoderContext *s = avctx->priv_data;
550
551		1	av_freep(&s->strip_sizes);
552		1	av_freep(&s->strip_offsets);
553		1	av_freep(&s->yuv_line);
554
555		1	return 0;
556			}
557
558			#define OFFSET(x) offsetof(TiffEncoderContext, x)
559			#define VE AV_OPT_FLAG_VIDEO_PARAM \| AV_OPT_FLAG_ENCODING_PARAM
560			static const AVOption options[] = {
561			{"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},
562			{ "compression_algo", NULL, OFFSET(compr), AV_OPT_TYPE_INT, { .i64 = TIFF_PACKBITS }, TIFF_RAW, TIFF_DEFLATE, VE, "compression_algo" },
563			{ "packbits", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = TIFF_PACKBITS }, 0, 0, VE, "compression_algo" },
564			{ "raw", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = TIFF_RAW }, 0, 0, VE, "compression_algo" },
565			{ "lzw", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = TIFF_LZW }, 0, 0, VE, "compression_algo" },
566			{ "deflate", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = TIFF_DEFLATE }, 0, 0, VE, "compression_algo" },
567			{ NULL },
568			};
569
570			static const AVClass tiffenc_class = {
571			.class_name = "TIFF encoder",
572			.item_name = av_default_item_name,
573			.option = options,
574			.version = LIBAVUTIL_VERSION_INT,
575			};
576
577			AVCodec ff_tiff_encoder = {
578			.name = "tiff",
579			.long_name = NULL_IF_CONFIG_SMALL("TIFF image"),
580			.type = AVMEDIA_TYPE_VIDEO,
581			.id = AV_CODEC_ID_TIFF,
582			.priv_data_size = sizeof(TiffEncoderContext),
583			.init = encode_init,
584			.close = encode_close,
585			.capabilities = AV_CODEC_CAP_FRAME_THREADS,
586			.encode2 = encode_frame,
587			.pix_fmts = (const enum AVPixelFormat[]) {
588			AV_PIX_FMT_RGB24, AV_PIX_FMT_RGB48LE, AV_PIX_FMT_PAL8,
589			AV_PIX_FMT_RGBA, AV_PIX_FMT_RGBA64LE,
590			AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY8A, AV_PIX_FMT_GRAY16LE, AV_PIX_FMT_YA16LE,
591			AV_PIX_FMT_MONOBLACK, AV_PIX_FMT_MONOWHITE,
592			AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
593			AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
594			AV_PIX_FMT_NONE
595			},
596			.priv_class = &tiffenc_class,
597			};