tiff: support decoding GBRP and GBRAP formats

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

libavcodec/tiff.c

@@ -52,6 +52,7 @@ typedef struct TiffContext {
     int le;
     enum TiffCompr compr;
     enum TiffPhotometric photometric;
+    int planar;
     int fax_opts;
     int predictor;
     int fill_order;
@@ -172,6 +173,9 @@ static int tiff_unpack_strip(TiffContext *s, uint8_t *dst, int stride,
     int c, line, pixels, code, ret;
     int width = ((s->width * s->bpp) + 7) >> 3;
 
+    if (s->planar)
+        width /= s->bppcount;
+
     if (size <= 0)
         return AVERROR_INVALIDDATA;
 
@@ -248,7 +252,7 @@ static int init_image(TiffContext *s, AVFrame *frame)
 {
     int ret;
 
-    switch (s->bpp * 10 + s->bppcount) {
+    switch (s->planar * 1000 + s->bpp * 10 + s->bppcount) {
     case 11:
         s->avctx->pix_fmt = AV_PIX_FMT_MONOBLACK;
         break;
@@ -276,6 +280,18 @@ static int init_image(TiffContext *s, AVFrame *frame)
     case 644:
         s->avctx->pix_fmt = s->le ? AV_PIX_FMT_RGBA64LE : AV_PIX_FMT_RGBA64BE;
         break;
+    case 1243:
+        s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
+        break;
+    case 1324:
+        s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
+        break;
+    case 1483:
+        s->avctx->pix_fmt = s->le ? AV_PIX_FMT_GBRP16LE : AV_PIX_FMT_GBRP16BE;
+        break;
+    case 1644:
+        s->avctx->pix_fmt = s->le ? AV_PIX_FMT_GBRAP16LE : AV_PIX_FMT_GBRAP16BE;
+        break;
     default:
         av_log(s->avctx, AV_LOG_ERROR,
                "This format is not supported (bpp=%d, bppcount=%d)\n",
@@ -507,10 +523,7 @@ static int tiff_decode_tag(TiffContext *s)
         break;
     }
     case TIFF_PLANAR:
-        if (value == 2) {
-            avpriv_report_missing_feature(s->avctx, "Planar format");
-            return AVERROR_PATCHWELCOME;
-        }
+        s->planar = value == 2;
         break;
     case TIFF_T4OPTIONS:
         if (s->compr == TIFF_G3)
@@ -538,7 +551,7 @@ static int decode_frame(AVCodecContext *avctx,
     TiffContext *const s = avctx->priv_data;
     AVFrame *const p = data;
     unsigned off;
-    int id, le, ret;
+    int id, le, ret, plane, planes;
     int i, j, entries, stride;
     unsigned soff, ssize;
     uint8_t *dst;
@@ -596,8 +609,6 @@ static int decode_frame(AVCodecContext *avctx,
         av_log(avctx, AV_LOG_WARNING, "Image data size missing\n");
         s->stripsize = avpkt->size - s->stripoff;
     }
-    stride = p->linesize[0];
-    dst    = p->data[0];
 
     if (s->stripsizesoff) {
         if (s->stripsizesoff >= avpkt->size)
@@ -612,6 +623,10 @@ static int decode_frame(AVCodecContext *avctx,
                          avpkt->size - s->strippos);
     }
 
+    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 = tget(&stripsizes, s->sstype, le);
@@ -636,7 +651,7 @@ static int decode_frame(AVCodecContext *avctx,
             dst += s->rps * stride;
         }
         if (s->predictor == 2) {
-        dst   = p->data[0];
+            dst   = p->data[plane];
             soff  = s->bpp >> 3;
             ssize = s->width * soff;
             if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48LE ||
@@ -663,13 +678,22 @@ static int decode_frame(AVCodecContext *avctx,
         }
 
         if (s->photometric == TIFF_PHOTOMETRIC_WHITE_IS_ZERO) {
-        dst = p->data[0];
+            dst = p->data[plane];
             for (i = 0; i < s->height; i++) {
-            for (j = 0; j < p->linesize[0]; j++)
+                for (j = 0; j < stride; j++)
                     dst[j] = 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]);
+    }
+
     *got_frame = 1;
 
     return avpkt->size;