diff options
Diffstat (limited to 'gst-libs/ext/libav/libavcodec/tiff.c')
-rw-r--r-- | gst-libs/ext/libav/libavcodec/tiff.c | 35 |
1 files changed, 22 insertions, 13 deletions
diff --git a/gst-libs/ext/libav/libavcodec/tiff.c b/gst-libs/ext/libav/libavcodec/tiff.c index a88d0f9..a0db1f1 100644 --- a/gst-libs/ext/libav/libavcodec/tiff.c +++ b/gst-libs/ext/libav/libavcodec/tiff.c @@ -59,24 +59,24 @@ typedef struct TiffContext { LZWState *lzw; } TiffContext; -static int tget_short(const uint8_t **p, int le){ - int v = le ? AV_RL16(*p) : AV_RB16(*p); +static unsigned tget_short(const uint8_t **p, int le) { + unsigned v = le ? AV_RL16(*p) : AV_RB16(*p); *p += 2; return v; } -static int tget_long(const uint8_t **p, int le){ - int v = le ? AV_RL32(*p) : AV_RB32(*p); +static unsigned tget_long(const uint8_t **p, int le) { + unsigned v = le ? AV_RL32(*p) : AV_RB32(*p); *p += 4; return v; } -static int tget(const uint8_t **p, int type, int le){ +static unsigned tget(const uint8_t **p, int type, int le) { switch(type){ case TIFF_BYTE : return *(*p)++; case TIFF_SHORT: return tget_short(p, le); case TIFF_LONG : return tget_long (p, le); - default : return -1; + default : return UINT_MAX; } } @@ -277,7 +277,7 @@ static int init_image(TiffContext *s) static int tiff_decode_tag(TiffContext *s, const uint8_t *start, const uint8_t *buf, const uint8_t *end_buf) { - int tag, type, count, off, value = 0; + unsigned tag, type, count, off, value = 0; int i, j; uint32_t *pal; const uint8_t *rp, *gp, *bp; @@ -289,6 +289,11 @@ static int tiff_decode_tag(TiffContext *s, const uint8_t *start, const uint8_t * count = tget_long(&buf, s->le); off = tget_long(&buf, s->le); + if (type == 0 || type >= FF_ARRAY_ELEMS(type_sizes)) { + av_log(s->avctx, AV_LOG_DEBUG, "Unknown tiff type (%u) encountered\n", type); + return 0; + } + if(count == 1){ switch(type){ case TIFF_BYTE: @@ -307,13 +312,15 @@ static int tiff_decode_tag(TiffContext *s, const uint8_t *start, const uint8_t * break; } default: - value = -1; + value = UINT_MAX; + buf = start + off; + } + } else { + if (count <= 4 && type_sizes[type] * count <= 4) { + buf -= 4; + } else { buf = start + off; } - }else if(type_sizes[type] * count <= 4){ - buf -= 4; - }else{ - buf = start + off; } if(buf && (buf < start || buf > end_buf)){ @@ -391,7 +398,7 @@ static int tiff_decode_tag(TiffContext *s, const uint8_t *start, const uint8_t * } break; case TIFF_ROWSPERSTRIP: - if(type == TIFF_LONG && value == -1) + if (type == TIFF_LONG && value == UINT_MAX) value = s->avctx->height; if(value < 1){ av_log(s->avctx, AV_LOG_ERROR, "Incorrect value of rows per strip\n"); @@ -528,6 +535,8 @@ static int decode_frame(AVCodecContext *avctx, av_log(avctx, AV_LOG_ERROR, "The answer to life, universe and everything is not correct!\n"); return -1; } + // Reset these pointers so we can tell if they were set this frame + s->stripsizes = s->stripdata = NULL; /* parse image file directory */ off = tget_long(&buf, le); if (off >= UINT_MAX - 14 || end_buf - orig_buf < off + 14) { |