X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fpngdec.c;h=a40cebbb83f5c555f3438a502f2e99df59fb2519;hb=c3513477bbbc0898e8fe38c4e37ac67298d76a48;hp=037c5a0e58af5c603a4319cf718ff7879479b06e;hpb=8fc0162ac44f3e60798552ca6d19387be95cae4c;p=ffmpeg

diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c
index 037c5a0e58a..a40cebbb83f 100644
--- a/libavcodec/pngdec.c
+++ b/libavcodec/pngdec.c
@@ -2,22 +2,23 @@
  * PNG image format
  * Copyright (c) 2003 Fabrice Bellard
  *
- * This file is part of FFmpeg.
+ * This file is part of Libav.
  *
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
+#include "libavutil/imgutils.h"
 #include "avcodec.h"
 #include "bytestream.h"
 #include "png.h"
@@ -396,7 +397,7 @@ static int decode_frame(AVCodecContext *avctx,
     AVFrame *p;
     uint8_t *crow_buf_base = NULL;
     uint32_t tag, length;
-    int ret, crc;
+    int ret;
 
     FFSWAP(AVFrame *, s->current_picture, s->last_picture);
     avctx->coded_frame= s->current_picture;
@@ -430,7 +431,7 @@ static int decode_frame(AVCodecContext *avctx,
             goto fail;
         tag32 = bytestream_get_be32(&s->bytestream);
         tag = av_bswap32(tag32);
-        dprintf(avctx, "png: tag=%c%c%c%c length=%u\n",
+        av_dlog(avctx, "png: tag=%c%c%c%c length=%u\n",
                 (tag & 0xff),
                 ((tag >> 8) & 0xff),
                 ((tag >> 16) & 0xff),
@@ -441,7 +442,7 @@ static int decode_frame(AVCodecContext *avctx,
                 goto fail;
             s->width = bytestream_get_be32(&s->bytestream);
             s->height = bytestream_get_be32(&s->bytestream);
-            if(avcodec_check_dimensions(avctx, s->width, s->height)){
+            if(av_image_check_size(s->width, s->height, 0, avctx)){
                 s->width= s->height= 0;
                 goto fail;
             }
@@ -450,9 +451,9 @@ static int decode_frame(AVCodecContext *avctx,
             s->compression_type = *s->bytestream++;
             s->filter_type = *s->bytestream++;
             s->interlace_type = *s->bytestream++;
-            crc = bytestream_get_be32(&s->bytestream);
+            s->bytestream += 4; /* crc */
             s->state |= PNG_IHDR;
-            dprintf(avctx, "width=%d height=%d depth=%d color_type=%d compression_type=%d filter_type=%d interlace_type=%d\n",
+            av_dlog(avctx, "width=%d height=%d depth=%d color_type=%d compression_type=%d filter_type=%d interlace_type=%d\n",
                     s->width, s->height, s->bit_depth, s->color_type,
                     s->compression_type, s->filter_type, s->interlace_type);
             break;
@@ -502,7 +503,7 @@ static int decode_frame(AVCodecContext *avctx,
                     av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
                     goto fail;
                 }
-                p->pict_type= FF_I_TYPE;
+                p->pict_type= AV_PICTURE_TYPE_I;
                 p->key_frame= 1;
                 p->interlaced_frame = !!s->interlace_type;
 
@@ -516,7 +517,7 @@ static int decode_frame(AVCodecContext *avctx,
                                                          s->width);
                     s->crow_size = s->pass_row_size + 1;
                 }
-                dprintf(avctx, "row_size=%d crow_size =%d\n",
+                av_dlog(avctx, "row_size=%d crow_size =%d\n",
                         s->row_size, s->crow_size);
                 s->image_buf = p->data[0];
                 s->image_linesize = p->linesize[0];
@@ -546,8 +547,7 @@ static int decode_frame(AVCodecContext *avctx,
             s->state |= PNG_IDAT;
             if (png_decode_idat(s, length) < 0)
                 goto fail;
-            /* skip crc */
-            crc = bytestream_get_be32(&s->bytestream);
+            s->bytestream += 4; /* crc */
             break;
         case MKTAG('P', 'L', 'T', 'E'):
             {
@@ -567,7 +567,7 @@ static int decode_frame(AVCodecContext *avctx,
                     s->palette[i] = (0xff << 24);
                 }
                 s->state |= PNG_PLTE;
-                crc = bytestream_get_be32(&s->bytestream);
+                s->bytestream += 4; /* crc */
             }
             break;
         case MKTAG('t', 'R', 'N', 'S'):
@@ -583,13 +583,13 @@ static int decode_frame(AVCodecContext *avctx,
                     v = *s->bytestream++;
                     s->palette[i] = (s->palette[i] & 0x00ffffff) | (v << 24);
                 }
-                crc = bytestream_get_be32(&s->bytestream);
+                s->bytestream += 4; /* crc */
             }
             break;
         case MKTAG('I', 'E', 'N', 'D'):
             if (!(s->state & PNG_ALLIMAGE))
                 goto fail;
-            crc = bytestream_get_be32(&s->bytestream);
+            s->bytestream += 4; /* crc */
             goto exit_loop;
         default:
             /* skip tag */
@@ -656,17 +656,14 @@ static av_cold int png_dec_end(AVCodecContext *avctx)
     return 0;
 }
 
-AVCodec png_decoder = {
-    "png",
-    AVMEDIA_TYPE_VIDEO,
-    CODEC_ID_PNG,
-    sizeof(PNGDecContext),
-    png_dec_init,
-    NULL,
-    png_dec_end,
-    decode_frame,
-    CODEC_CAP_DR1 /*| CODEC_CAP_DRAW_HORIZ_BAND*/,
-    NULL,
-    .max_lowres = 5,
+AVCodec ff_png_decoder = {
+    .name           = "png",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = CODEC_ID_PNG,
+    .priv_data_size = sizeof(PNGDecContext),
+    .init           = png_dec_init,
+    .close          = png_dec_end,
+    .decode         = decode_frame,
+    .capabilities   = CODEC_CAP_DR1 /*| CODEC_CAP_DRAW_HORIZ_BAND*/,
     .long_name = NULL_IF_CONFIG_SMALL("PNG image"),
 };