X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Ftiff.c;h=8818a665307e34b5ccd1528781ce2965a1fd11a3;hb=b07781b6e4f6267f20aec4e7f1d390ddb223af46;hp=b7f4db31704c8427c3758a9ff202cadc9fde551b;hpb=9706d1c766b609961bea44d475c84c01b7ee10a5;p=ffmpeg

diff --git a/libavcodec/tiff.c b/libavcodec/tiff.c
index b7f4db31704..8818a665307 100644
--- a/libavcodec/tiff.c
+++ b/libavcodec/tiff.c
@@ -44,6 +44,7 @@ typedef struct TiffContext {
     int invert;
     int fax_opts;
     int predictor;
+    int fill_order;
 
     int strips, rps, sstype;
     int sot;
@@ -74,6 +75,29 @@ static int tget(const uint8_t **p, int type, int le){
     }
 }
 
+#if CONFIG_ZLIB
+static int tiff_uncompress(uint8_t *dst, unsigned long *len, const uint8_t *src, int size)
+{
+    z_stream zstream;
+    int zret;
+
+    memset(&zstream, 0, sizeof(zstream));
+    zstream.next_in = src;
+    zstream.avail_in = size;
+    zstream.next_out = dst;
+    zstream.avail_out = *len;
+    zret = inflateInit(&zstream);
+    if (zret != Z_OK) {
+        av_log(NULL, AV_LOG_ERROR, "Inflate init error: %d\n", zret);
+        return zret;
+    }
+    zret = inflate(&zstream, Z_SYNC_FLUSH);
+    inflateEnd(&zstream);
+    *len = zstream.total_out;
+    return zret == Z_STREAM_END ? Z_OK : zret;
+}
+#endif
+
 static int tiff_unpack_strip(TiffContext *s, uint8_t* dst, int stride, const uint8_t *src, int size, int lines){
     int c, line, pixels, code;
     const uint8_t *ssrc = src;
@@ -82,10 +106,12 @@ static int tiff_unpack_strip(TiffContext *s, uint8_t* dst, int stride, const uin
     uint8_t *zbuf; unsigned long outlen;
 
     if(s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE){
+        int ret;
         outlen = width * lines;
         zbuf = av_malloc(outlen);
-        if(uncompress(zbuf, &outlen, src, size) != Z_OK){
-            av_log(s->avctx, AV_LOG_ERROR, "Uncompressing failed (%lu of %lu)\n", outlen, (unsigned long)width * lines);
+        ret = tiff_uncompress(zbuf, &outlen, src, size);
+        if(ret != Z_OK){
+            av_log(s->avctx, AV_LOG_ERROR, "Uncompressing failed (%lu of %lu) with error %d\n", outlen, (unsigned long)width * lines, ret);
             av_free(zbuf);
             return -1;
         }
@@ -113,16 +139,23 @@ static int tiff_unpack_strip(TiffContext *s, uint8_t* dst, int stride, const uin
             av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");
             return -1;
         }
-        for(i = 0; i < size; i++)
-            src2[i] = ff_reverse[src[i]];
+        if(s->fax_opts & 2){
+            av_log(s->avctx, AV_LOG_ERROR, "Uncompressed fax mode is not supported (yet)\n");
+            av_free(src2);
+            return -1;
+        }
+        if(!s->fill_order){
+            memcpy(src2, src, size);
+        }else{
+            for(i = 0; i < size; i++)
+                src2[i] = ff_reverse[src[i]];
+        }
         memset(src2+size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
-        if(s->compr == TIFF_G3 && !(s->fax_opts & 1))
-            s->compr = TIFF_CCITT_RLE;
         switch(s->compr){
         case TIFF_CCITT_RLE:
         case TIFF_G3:
         case TIFF_G4:
-            ret = ff_ccitt_unpack(s->avctx, src2, size, dst, lines, stride, s->compr);
+            ret = ff_ccitt_unpack(s->avctx, src2, size, dst, lines, stride, s->compr, s->fax_opts);
             break;
         }
         av_free(src2);
@@ -375,6 +408,13 @@ static int tiff_decode_tag(TiffContext *s, const uint8_t *start, const uint8_t *
             return -1;
         }
         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:
         if(s->avctx->pix_fmt != PIX_FMT_PAL8){
             av_log(s->avctx, AV_LOG_ERROR, "Palette met but this is not palettized format\n");
@@ -400,8 +440,12 @@ static int tiff_decode_tag(TiffContext *s, const uint8_t *start, const uint8_t *
         }
         break;
     case TIFF_T4OPTIONS:
+        if(s->compr == TIFF_G3)
+            s->fax_opts = value;
+        break;
     case TIFF_T6OPTIONS:
-        s->fax_opts = value;
+        if(s->compr == TIFF_G4)
+            s->fax_opts = value;
         break;
     }
     return 0;
@@ -433,6 +477,7 @@ static int decode_frame(AVCodecContext *avctx,
     s->le = le;
     s->invert = 0;
     s->compr = TIFF_RAW;
+    s->fill_order = 0;
     // As TIFF 6.0 specification puts it "An arbitrary but carefully chosen number
     // that further identifies the file as a TIFF file"
     if(tget_short(&buf, le) != 42){
@@ -458,8 +503,19 @@ static int decode_frame(AVCodecContext *avctx,
     }
     /* now we have the data and may start decoding */
     if(!p->data[0]){
-        av_log(s->avctx, AV_LOG_ERROR, "Picture initialization missing\n");
-        return -1;
+        s->bpp = 1;
+        avctx->pix_fmt = PIX_FMT_MONOBLACK;
+        if(s->width != s->avctx->width || s->height != s->avctx->height){
+            if(avcodec_check_dimensions(s->avctx, s->width, s->height))
+                return -1;
+            avcodec_set_dimensions(s->avctx, s->width, s->height);
+        }
+        if(s->picture.data[0])
+            s->avctx->release_buffer(s->avctx, &s->picture);
+        if(s->avctx->get_buffer(s->avctx, &s->picture) < 0){
+            av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+            return -1;
+        }
     }
     if(s->strips == 1 && !s->stripsize){
         av_log(avctx, AV_LOG_WARNING, "Image data size missing\n");
@@ -542,7 +598,7 @@ AVCodec tiff_decoder = {
     NULL,
     tiff_end,
     decode_frame,
-    0,
+    CODEC_CAP_DR1,
     NULL,
     .long_name = NULL_IF_CONFIG_SMALL("TIFF image"),
 };