diff options
Diffstat (limited to 'libavcodec/tiff.c')
-rw-r--r-- | libavcodec/tiff.c | 88 |
1 files changed, 82 insertions, 6 deletions
diff --git a/libavcodec/tiff.c b/libavcodec/tiff.c index 10c053a..d4fba0d 100644 --- a/libavcodec/tiff.c +++ b/libavcodec/tiff.c @@ -68,6 +68,8 @@ typedef struct TiffContext { uint8_t *deinvert_buf; int deinvert_buf_size; + uint8_t *yuv_line; + unsigned int yuv_line_size; int geotag_count; TiffGeoTag *geotags; @@ -381,13 +383,43 @@ static int tiff_unpack_fax(TiffContext *s, uint8_t *dst, int stride, return ret; } -static int tiff_unpack_strip(TiffContext *s, uint8_t *dst, int stride, - const uint8_t *src, int size, int lines) +static void unpack_yuv(TiffContext *s, AVFrame *p, + const uint8_t *src, 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++) + p->data[0][FFMIN(lnum + j, s->height-1) * p->linesize[0] + + FFMIN(i * s->subsampling[0] + k, s->width-1)] = *src++; + *pu++ = *src++; + *pv++ = *src++; + } + }else{ + for (i = 0; i < w; i++) { + for (j = 0; j < s->subsampling[1]; j++) + for (k = 0; k < s->subsampling[0]; k++) + p->data[0][(lnum + j) * p->linesize[0] + + i * s->subsampling[0] + k] = *src++; + *pu++ = *src++; + *pv++ = *src++; + } + } +} + + +static int tiff_unpack_strip(TiffContext *s, AVFrame *p, uint8_t *dst, int stride, + const uint8_t *src, int size, int strip_start, int lines) { PutByteContext pb; int c, line, pixels, code, ret; const uint8_t *ssrc = src; int width = ((s->width * s->bpp) + 7) >> 3; + int is_yuv = s->photometric == TIFF_PHOTOMETRIC_YCBCR; if (s->planar) width /= s->bppcount; @@ -395,7 +427,26 @@ static int tiff_unpack_strip(TiffContext *s, uint8_t *dst, int stride, if (size <= 0) return AVERROR_INVALIDDATA; + if (is_yuv) { + int bytes_per_row = (((s->width - 1) / s->subsampling[0] + 1) * s->bpp * + s->subsampling[0] * s->subsampling[1] + 7) >> 3; + 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"); + return AVERROR(ENOMEM); + } + dst = s->yuv_line; + stride = 0; + width = s->width * s->subsampling[1] + 2*(s->width / s->subsampling[0]); + av_assert0(width <= bytes_per_row); + av_assert0(s->bpp == 24); + } + if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE) { + if (is_yuv) { + av_log(s->avctx, AV_LOG_ERROR, "YUV deflate is unsupported"); + return AVERROR_PATCHWELCOME; + } #if CONFIG_ZLIB return tiff_unpack_zlib(s, dst, stride, src, size, width, lines); #else @@ -427,6 +478,10 @@ static int tiff_unpack_strip(TiffContext *s, uint8_t *dst, int stride, } if (s->bpp < 8 && s->avctx->pix_fmt == AV_PIX_FMT_PAL8) horizontal_fill(s->bpp, dst, 1, dst, 0, width, 0); + if (is_yuv) { + unpack_yuv(s, p, dst, strip_start + line); + line += s->subsampling[1] - 1; + } dst += stride; } return 0; @@ -434,11 +489,14 @@ static int tiff_unpack_strip(TiffContext *s, uint8_t *dst, int stride, if (s->compr == TIFF_CCITT_RLE || s->compr == TIFF_G3 || s->compr == TIFF_G4) { + if (is_yuv) + return AVERROR_INVALIDDATA; + return tiff_unpack_fax(s, dst, stride, src, size, width, lines); } bytestream2_init(&s->gb, src, size); - bytestream2_init_writer(&pb, dst, stride * lines); + bytestream2_init_writer(&pb, dst, is_yuv ? s->yuv_line_size : (stride * lines)); for (line = 0; line < lines; line++) { if (src - ssrc > size) { @@ -503,6 +561,10 @@ static int tiff_unpack_strip(TiffContext *s, uint8_t *dst, int stride, } break; } + if (is_yuv) { + unpack_yuv(s, p, dst, strip_start + line); + line += s->subsampling[1] - 1; + } dst += stride; } return 0; @@ -525,7 +587,17 @@ static int init_image(TiffContext *s, ThreadFrame *frame) s->avctx->pix_fmt = AV_PIX_FMT_PAL8; break; case 243: - s->avctx->pix_fmt = AV_PIX_FMT_RGB24; + if (s->photometric == TIFF_PHOTOMETRIC_YCBCR) { + if (s->subsampling[0] == 1 && s->subsampling[1] == 1) { + s->avctx->pix_fmt = AV_PIX_FMT_YUV444P; + } else if (s->subsampling[0] == 2 && s->subsampling[1] == 2) { + s->avctx->pix_fmt = AV_PIX_FMT_YUV420P; + } else { + av_log(s->avctx, AV_LOG_ERROR, "Unsupported YCbCr subsampling\n"); + return AVERROR_PATCHWELCOME; + } + } else + s->avctx->pix_fmt = AV_PIX_FMT_RGB24; break; case 161: s->avctx->pix_fmt = s->le ? AV_PIX_FMT_GRAY16LE : AV_PIX_FMT_GRAY16BE; @@ -750,11 +822,11 @@ static int tiff_decode_tag(TiffContext *s, AVFrame *frame) 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_YCBCR: case TIFF_PHOTOMETRIC_CIE_LAB: case TIFF_PHOTOMETRIC_ICC_LAB: case TIFF_PHOTOMETRIC_ITU_LAB: @@ -1076,7 +1148,7 @@ static int decode_frame(AVCodecContext *avctx, av_log(avctx, AV_LOG_ERROR, "Invalid strip size/offset\n"); return AVERROR_INVALIDDATA; } - if ((ret = tiff_unpack_strip(s, dst, stride, avpkt->data + soff, ssize, + 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; @@ -1085,6 +1157,10 @@ static int decode_frame(AVCodecContext *avctx, 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) |