Beispiel #1
0
int avpriv_exif_decode_ifd(AVCodecContext *avctx, GetByteContext *gbytes, int le,
                           int depth, AVDictionary **metadata)
{
    int i, ret;
    int entries;

    entries = ff_tget_short(gbytes, le);

    if (bytestream2_get_bytes_left(gbytes) < entries * 12) {
        return AVERROR_INVALIDDATA;
    }

    for (i = 0; i < entries; i++) {
        if ((ret = exif_decode_tag(avctx, gbytes, le, depth, metadata)) < 0) {
            return ret;
        }
    }

    // return next IDF offset or 0x000000000 or a value < 0 for failure
    return ff_tget_long(gbytes, le);
}
Beispiel #2
0
static int tiff_decode_tag(TiffContext *s, AVFrame *frame)
{
    unsigned tag, type, count, off, value = 0, value2 = 0;
    int i, start;
    int pos;
    int ret;
    double *dp;

    ret = ff_tread_tag(&s->gb, s->le, &tag, &type, &count, &start);
    if (ret < 0) {
        goto end;
    }

    off = bytestream2_tell(&s->gb);
    if (count == 1) {
        switch (type) {
        case TIFF_BYTE:
        case TIFF_SHORT:
        case TIFF_LONG:
            value = ff_tget(&s->gb, type, s->le);
            break;
        case TIFF_RATIONAL:
            value  = ff_tget(&s->gb, TIFF_LONG, s->le);
            value2 = ff_tget(&s->gb, TIFF_LONG, s->le);
            break;
        case TIFF_STRING:
            if (count <= 4) {
                break;
            }
        default:
            value = UINT_MAX;
        }
    }

    switch (tag) {
    case TIFF_WIDTH:
        s->width = value;
        break;
    case TIFF_HEIGHT:
        s->height = value;
        break;
    case TIFF_BPP:
        s->bppcount = count;
        if (count > 4) {
            av_log(s->avctx, AV_LOG_ERROR,
                   "This format is not supported (bpp=%d, %d components)\n",
                   s->bpp, count);
            return AVERROR_INVALIDDATA;
        }
        if (count == 1)
            s->bpp = value;
        else {
            switch (type) {
            case TIFF_BYTE:
            case TIFF_SHORT:
            case TIFF_LONG:
                s->bpp = 0;
                if (bytestream2_get_bytes_left(&s->gb) < type_sizes[type] * count)
                    return AVERROR_INVALIDDATA;
                for (i = 0; i < count; i++)
                    s->bpp += ff_tget(&s->gb, type, s->le);
                break;
            default:
                s->bpp = -1;
            }
        }
        break;
    case TIFF_SAMPLES_PER_PIXEL:
        if (count != 1) {
            av_log(s->avctx, AV_LOG_ERROR,
                   "Samples per pixel requires a single value, many provided\n");
            return AVERROR_INVALIDDATA;
        }
        if (value > 4U) {
            av_log(s->avctx, AV_LOG_ERROR,
                   "Samples per pixel %d is too large\n", value);
            return AVERROR_INVALIDDATA;
        }
        if (s->bppcount == 1)
            s->bpp *= value;
        s->bppcount = value;
        break;
    case TIFF_COMPR:
        s->compr     = value;
        s->predictor = 0;
        switch (s->compr) {
        case TIFF_RAW:
        case TIFF_PACKBITS:
        case TIFF_LZW:
        case TIFF_CCITT_RLE:
            break;
        case TIFF_G3:
        case TIFF_G4:
            s->fax_opts = 0;
            break;
        case TIFF_DEFLATE:
        case TIFF_ADOBE_DEFLATE:
#if CONFIG_ZLIB
            break;
#else
            av_log(s->avctx, AV_LOG_ERROR, "Deflate: ZLib not compiled in\n");
            return AVERROR(ENOSYS);
#endif
        case TIFF_JPEG:
        case TIFF_NEWJPEG:
            avpriv_report_missing_feature(s->avctx, "JPEG compression");
            return AVERROR_PATCHWELCOME;
        default:
            av_log(s->avctx, AV_LOG_ERROR, "Unknown compression method %i\n",
                   s->compr);
            return AVERROR_INVALIDDATA;
        }
        break;
    case TIFF_ROWSPERSTRIP:
        if (!value || (type == TIFF_LONG && value == UINT_MAX))
            value = s->height;
        s->rps = FFMIN(value, s->height);
        break;
    case TIFF_STRIP_OFFS:
        if (count == 1) {
            s->strippos = 0;
            s->stripoff = value;
        } else
            s->strippos = off;
        s->strips = count;
        if (s->strips == 1)
            s->rps = s->height;
        s->sot = type;
        break;
    case TIFF_STRIP_SIZE:
        if (count == 1) {
            s->stripsizesoff = 0;
            s->stripsize     = value;
            s->strips        = 1;
        } else {
            s->stripsizesoff = off;
        }
        s->strips = count;
        s->sstype = type;
        break;
    case TIFF_XRES:
    case TIFF_YRES:
        set_sar(s, tag, value, value2);
        break;
    case TIFF_TILE_BYTE_COUNTS:
    case TIFF_TILE_LENGTH:
    case TIFF_TILE_OFFSETS:
    case TIFF_TILE_WIDTH:
        av_log(s->avctx, AV_LOG_ERROR, "Tiled images are not supported\n");
        return AVERROR_PATCHWELCOME;
        break;
    case TIFF_PREDICTOR:
        s->predictor = value;
        break;
    case TIFF_PHOTOMETRIC:
        switch (value) {
        case TIFF_PHOTOMETRIC_WHITE_IS_ZERO:
        case TIFF_PHOTOMETRIC_BLACK_IS_ZERO:
        case TIFF_PHOTOMETRIC_RGB:
        case TIFF_PHOTOMETRIC_PALETTE:
        case TIFF_PHOTOMETRIC_YCBCR:
            s->photometric = value;
            break;
        case TIFF_PHOTOMETRIC_ALPHA_MASK:
        case TIFF_PHOTOMETRIC_SEPARATED:
        case TIFF_PHOTOMETRIC_CIE_LAB:
        case TIFF_PHOTOMETRIC_ICC_LAB:
        case TIFF_PHOTOMETRIC_ITU_LAB:
        case TIFF_PHOTOMETRIC_CFA:
        case TIFF_PHOTOMETRIC_LOG_L:
        case TIFF_PHOTOMETRIC_LOG_LUV:
        case TIFF_PHOTOMETRIC_LINEAR_RAW:
            avpriv_report_missing_feature(s->avctx,
                                          "PhotometricInterpretation 0x%04X",
                                          value);
            return AVERROR_PATCHWELCOME;
        default:
            av_log(s->avctx, AV_LOG_ERROR, "PhotometricInterpretation %u is "
                   "unknown\n", value);
            return AVERROR_INVALIDDATA;
        }
        break;
    case TIFF_FILL_ORDER:
        if (value < 1 || value > 2) {
            av_log(s->avctx, AV_LOG_ERROR,
                   "Unknown FillOrder value %d, trying default one\n", value);
            value = 1;
        }
        s->fill_order = value - 1;
        break;
    case TIFF_PAL: {
        GetByteContext pal_gb[3];
        off = type_sizes[type];
        if (count / 3 > 256 ||
            bytestream2_get_bytes_left(&s->gb) < count / 3 * off * 3)
            return AVERROR_INVALIDDATA;

        pal_gb[0] = pal_gb[1] = pal_gb[2] = s->gb;
        bytestream2_skip(&pal_gb[1], count / 3 * off);
        bytestream2_skip(&pal_gb[2], count / 3 * off * 2);

        off = (type_sizes[type] - 1) << 3;
        for (i = 0; i < count / 3; i++) {
            uint32_t p = 0xFF000000;
            p |= (ff_tget(&pal_gb[0], type, s->le) >> off) << 16;
            p |= (ff_tget(&pal_gb[1], type, s->le) >> off) << 8;
            p |=  ff_tget(&pal_gb[2], type, s->le) >> off;
            s->palette[i] = p;
        }
        s->palette_is_set = 1;
        break;
    }
    case TIFF_PLANAR:
        s->planar = value == 2;
        break;
    case TIFF_YCBCR_SUBSAMPLING:
        if (count != 2) {
            av_log(s->avctx, AV_LOG_ERROR, "subsample count invalid\n");
            return AVERROR_INVALIDDATA;
        }
        for (i = 0; i < count; i++)
            s->subsampling[i] = ff_tget(&s->gb, type, s->le);
        break;
    case TIFF_T4OPTIONS:
        if (s->compr == TIFF_G3)
            s->fax_opts = value;
        break;
    case TIFF_T6OPTIONS:
        if (s->compr == TIFF_G4)
            s->fax_opts = value;
        break;
#define ADD_METADATA(count, name, sep)\
    if ((ret = add_metadata(count, type, name, sep, s, frame)) < 0) {\
        av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");\
        goto end;\
    }
    case TIFF_MODEL_PIXEL_SCALE:
        ADD_METADATA(count, "ModelPixelScaleTag", NULL);
        break;
    case TIFF_MODEL_TRANSFORMATION:
        ADD_METADATA(count, "ModelTransformationTag", NULL);
        break;
    case TIFF_MODEL_TIEPOINT:
        ADD_METADATA(count, "ModelTiepointTag", NULL);
        break;
    case TIFF_GEO_KEY_DIRECTORY:
        ADD_METADATA(1, "GeoTIFF_Version", NULL);
        ADD_METADATA(2, "GeoTIFF_Key_Revision", ".");
        s->geotag_count   = ff_tget_short(&s->gb, s->le);
        if (s->geotag_count > count / 4 - 1) {
            s->geotag_count = count / 4 - 1;
            av_log(s->avctx, AV_LOG_WARNING, "GeoTIFF key directory buffer shorter than specified\n");
        }
        if (bytestream2_get_bytes_left(&s->gb) < s->geotag_count * sizeof(int16_t) * 4) {
            s->geotag_count = 0;
            return -1;
        }
        s->geotags = av_mallocz_array(s->geotag_count, sizeof(TiffGeoTag));
        if (!s->geotags) {
            av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");
            s->geotag_count = 0;
            goto end;
        }
        for (i = 0; i < s->geotag_count; i++) {
            s->geotags[i].key    = ff_tget_short(&s->gb, s->le);
            s->geotags[i].type   = ff_tget_short(&s->gb, s->le);
            s->geotags[i].count  = ff_tget_short(&s->gb, s->le);

            if (!s->geotags[i].type)
                s->geotags[i].val  = get_geokey_val(s->geotags[i].key, ff_tget_short(&s->gb, s->le));
            else
                s->geotags[i].offset = ff_tget_short(&s->gb, s->le);
        }
        break;
    case TIFF_GEO_DOUBLE_PARAMS:
        if (count >= INT_MAX / sizeof(int64_t))
            return AVERROR_INVALIDDATA;
        if (bytestream2_get_bytes_left(&s->gb) < count * sizeof(int64_t))
            return AVERROR_INVALIDDATA;
        dp = av_malloc_array(count, sizeof(double));
        if (!dp) {
            av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");
            goto end;
        }
        for (i = 0; i < count; i++)
            dp[i] = ff_tget_double(&s->gb, s->le);
        for (i = 0; i < s->geotag_count; i++) {
            if (s->geotags[i].type == TIFF_GEO_DOUBLE_PARAMS) {
                if (s->geotags[i].count == 0
                    || s->geotags[i].offset + s->geotags[i].count > count) {
                    av_log(s->avctx, AV_LOG_WARNING, "Invalid GeoTIFF key %d\n", s->geotags[i].key);
                } else {
                    char *ap = doubles2str(&dp[s->geotags[i].offset], s->geotags[i].count, ", ");
                    if (!ap) {
                        av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");
                        av_freep(&dp);
                        return AVERROR(ENOMEM);
                    }
                    s->geotags[i].val = ap;
                }
            }
        }
        av_freep(&dp);
        break;
    case TIFF_GEO_ASCII_PARAMS:
        pos = bytestream2_tell(&s->gb);
        for (i = 0; i < s->geotag_count; i++) {
            if (s->geotags[i].type == TIFF_GEO_ASCII_PARAMS) {
                if (s->geotags[i].count == 0
                    || s->geotags[i].offset +  s->geotags[i].count > count) {
                    av_log(s->avctx, AV_LOG_WARNING, "Invalid GeoTIFF key %d\n", s->geotags[i].key);
                } else {
                    char *ap;

                    bytestream2_seek(&s->gb, pos + s->geotags[i].offset, SEEK_SET);
                    if (bytestream2_get_bytes_left(&s->gb) < s->geotags[i].count)
                        return AVERROR_INVALIDDATA;
                    ap = av_malloc(s->geotags[i].count);
                    if (!ap) {
                        av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");
                        return AVERROR(ENOMEM);
                    }
                    bytestream2_get_bufferu(&s->gb, ap, s->geotags[i].count);
                    ap[s->geotags[i].count - 1] = '\0'; //replace the "|" delimiter with a 0 byte
                    s->geotags[i].val = ap;
                }
            }
        }
        break;
    case TIFF_ARTIST:
        ADD_METADATA(count, "artist", NULL);
        break;
    case TIFF_COPYRIGHT:
        ADD_METADATA(count, "copyright", NULL);
        break;
    case TIFF_DATE:
        ADD_METADATA(count, "date", NULL);
        break;
    case TIFF_DOCUMENT_NAME:
        ADD_METADATA(count, "document_name", NULL);
        break;
    case TIFF_HOST_COMPUTER:
        ADD_METADATA(count, "computer", NULL);
        break;
    case TIFF_IMAGE_DESCRIPTION:
        ADD_METADATA(count, "description", NULL);
        break;
    case TIFF_MAKE:
        ADD_METADATA(count, "make", NULL);
        break;
    case TIFF_MODEL:
        ADD_METADATA(count, "model", NULL);
        break;
    case TIFF_PAGE_NAME:
        ADD_METADATA(count, "page_name", NULL);
        break;
    case TIFF_PAGE_NUMBER:
        ADD_METADATA(count, "page_number", " / ");
        break;
    case TIFF_SOFTWARE_NAME:
        ADD_METADATA(count, "software", NULL);
        break;
    default:
        if (s->avctx->err_recognition & AV_EF_EXPLODE) {
            av_log(s->avctx, AV_LOG_ERROR,
                   "Unknown or unsupported tag %d/0X%0X\n",
                   tag, tag);
            return AVERROR_INVALIDDATA;
        }
    }
end:
    bytestream2_seek(&s->gb, start, SEEK_SET);
    return 0;
}
Beispiel #3
0
static int decode_frame(AVCodecContext *avctx,
                        void *data, int *got_frame, AVPacket *avpkt)
{
    TiffContext *const s = avctx->priv_data;
    AVFrame *const p = data;
    ThreadFrame frame = { .f = data };
    unsigned off;
    int le, ret, plane, planes;
    int i, j, entries, stride;
    unsigned soff, ssize;
    uint8_t *dst;
    GetByteContext stripsizes;
    GetByteContext stripdata;

    bytestream2_init(&s->gb, avpkt->data, avpkt->size);

    // parse image header
    if ((ret = ff_tdecode_header(&s->gb, &le, &off))) {
        av_log(avctx, AV_LOG_ERROR, "Invalid TIFF header\n");
        return ret;
    } else if (off >= UINT_MAX - 14 || avpkt->size < off + 14) {
        av_log(avctx, AV_LOG_ERROR, "IFD offset is greater than image size\n");
        return AVERROR_INVALIDDATA;
    }
    s->le          = le;
    // TIFF_BPP is not a required tag and defaults to 1
    s->bppcount    = s->bpp = 1;
    s->photometric = TIFF_PHOTOMETRIC_NONE;
    s->compr       = TIFF_RAW;
    s->fill_order  = 0;
    free_geotags(s);

    // Reset these offsets so we can tell if they were set this frame
    s->stripsizesoff = s->strippos = 0;
    /* parse image file directory */
    bytestream2_seek(&s->gb, off, SEEK_SET);
    entries = ff_tget_short(&s->gb, le);
    if (bytestream2_get_bytes_left(&s->gb) < entries * 12)
        return AVERROR_INVALIDDATA;
    for (i = 0; i < entries; i++) {
        if ((ret = tiff_decode_tag(s, p)) < 0)
            return ret;
    }

    for (i = 0; i<s->geotag_count; i++) {
        const char *keyname = get_geokey_name(s->geotags[i].key);
        if (!keyname) {
            av_log(avctx, AV_LOG_WARNING, "Unknown or unsupported GeoTIFF key %d\n", s->geotags[i].key);
            continue;
        }
        if (get_geokey_type(s->geotags[i].key) != s->geotags[i].type) {
            av_log(avctx, AV_LOG_WARNING, "Type of GeoTIFF key %d is wrong\n", s->geotags[i].key);
            continue;
        }
        ret = av_dict_set(avpriv_frame_get_metadatap(p), keyname, s->geotags[i].val, 0);
        if (ret<0) {
            av_log(avctx, AV_LOG_ERROR, "Writing metadata with key '%s' failed\n", keyname);
            return ret;
        }
    }

    if (!s->strippos && !s->stripoff) {
        av_log(avctx, AV_LOG_ERROR, "Image data is missing\n");
        return AVERROR_INVALIDDATA;
    }
    /* now we have the data and may start decoding */
    if ((ret = init_image(s, &frame)) < 0)
        return ret;

    if (s->strips == 1 && !s->stripsize) {
        av_log(avctx, AV_LOG_WARNING, "Image data size missing\n");
        s->stripsize = avpkt->size - s->stripoff;
    }

    if (s->stripsizesoff) {
        if (s->stripsizesoff >= (unsigned)avpkt->size)
            return AVERROR_INVALIDDATA;
        bytestream2_init(&stripsizes, avpkt->data + s->stripsizesoff,
                         avpkt->size - s->stripsizesoff);
    }
    if (s->strippos) {
        if (s->strippos >= (unsigned)avpkt->size)
            return AVERROR_INVALIDDATA;
        bytestream2_init(&stripdata, avpkt->data + s->strippos,
                         avpkt->size - s->strippos);
    }

    if (s->rps <= 0) {
        av_log(avctx, AV_LOG_ERROR, "rps %d invalid\n", s->rps);
        return AVERROR_INVALIDDATA;
    }

    planes = s->planar ? s->bppcount : 1;
    for (plane = 0; plane < planes; plane++) {
        stride = p->linesize[plane];
        dst    = p->data[plane];
    for (i = 0; i < s->height; i += s->rps) {
        if (s->stripsizesoff)
            ssize = ff_tget(&stripsizes, s->sstype, le);
        else
            ssize = s->stripsize;

        if (s->strippos)
            soff = ff_tget(&stripdata, s->sot, le);
        else
            soff = s->stripoff;

        if (soff > avpkt->size || ssize > avpkt->size - soff) {
            av_log(avctx, AV_LOG_ERROR, "Invalid strip size/offset\n");
            return AVERROR_INVALIDDATA;
        }
        if ((ret = tiff_unpack_strip(s, p, dst, stride, avpkt->data + soff, ssize, i,
                                     FFMIN(s->rps, s->height - i))) < 0) {
            if (avctx->err_recognition & AV_EF_EXPLODE)
                return ret;
            break;
        }
        dst += s->rps * stride;
    }
    if (s->predictor == 2) {
        if (s->photometric == TIFF_PHOTOMETRIC_YCBCR) {
            av_log(s->avctx, AV_LOG_ERROR, "predictor == 2 with YUV is unsupported");
            return AVERROR_PATCHWELCOME;
        }
        dst   = p->data[plane];
        soff  = s->bpp >> 3;
        if (s->planar)
            soff  = FFMAX(soff / s->bppcount, 1);
        ssize = s->width * soff;
        if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48LE ||
            s->avctx->pix_fmt == AV_PIX_FMT_RGBA64LE ||
            s->avctx->pix_fmt == AV_PIX_FMT_GBRP16LE ||
            s->avctx->pix_fmt == AV_PIX_FMT_GBRAP16LE) {
            for (i = 0; i < s->height; i++) {
                for (j = soff; j < ssize; j += 2)
                    AV_WL16(dst + j, AV_RL16(dst + j) + AV_RL16(dst + j - soff));
                dst += stride;
            }
        } else if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48BE ||
                   s->avctx->pix_fmt == AV_PIX_FMT_RGBA64BE ||
                   s->avctx->pix_fmt == AV_PIX_FMT_GBRP16BE ||
                   s->avctx->pix_fmt == AV_PIX_FMT_GBRAP16BE) {
            for (i = 0; i < s->height; i++) {
                for (j = soff; j < ssize; j += 2)
                    AV_WB16(dst + j, AV_RB16(dst + j) + AV_RB16(dst + j - soff));
                dst += stride;
            }
        } else {
            for (i = 0; i < s->height; i++) {
                for (j = soff; j < ssize; j++)
                    dst[j] += dst[j - soff];
                dst += stride;
            }
        }
    }

    if (s->photometric == TIFF_PHOTOMETRIC_WHITE_IS_ZERO) {
        dst = p->data[plane];
        for (i = 0; i < s->height; i++) {
            for (j = 0; j < p->linesize[plane]; j++)
                dst[j] = (s->avctx->pix_fmt == AV_PIX_FMT_PAL8 ? (1<<s->bpp) - 1 : 255) - dst[j];
            dst += stride;
        }
    }
    }

    if (s->planar && s->bppcount > 2) {
        FFSWAP(uint8_t*, p->data[0],     p->data[2]);
        FFSWAP(int,      p->linesize[0], p->linesize[2]);
        FFSWAP(uint8_t*, p->data[0],     p->data[1]);
        FFSWAP(int,      p->linesize[0], p->linesize[1]);
    }