X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fpngdec.c;h=1d72f9542a730f12858f5d801f19466ea52d9602;hb=924978341516fc234a78ff5bad89d6bd6b36de23;hp=0d6612cccafb897e1518848e6d6755b564e5998c;hpb=d9e59029a1569c1dd8dafd160682fc4ea5f5bc33;p=ffmpeg

diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c
index 0d6612cccaf..1d72f9542a7 100644
--- a/libavcodec/pngdec.c
+++ b/libavcodec/pngdec.c
@@ -25,6 +25,7 @@
 #include "libavutil/bprint.h"
 #include "libavutil/imgutils.h"
 #include "libavutil/stereo3d.h"
+#include "libavutil/mastering_display_metadata.h"
 
 #include "avcodec.h"
 #include "bytestream.h"
@@ -523,9 +524,9 @@ static int decode_text_chunk(PNGDecContext *s, uint32_t length, int compressed,
         if ((ret = decode_zbuf(&bp, data, data_end)) < 0)
             return ret;
         text_len = bp.len;
-        av_bprint_finalize(&bp, (char **)&text);
-        if (!text)
-            return AVERROR(ENOMEM);
+        ret = av_bprint_finalize(&bp, (char **)&text);
+        if (ret < 0)
+            return ret;
     } else {
         text = (uint8_t *)data;
         text_len = data_end - text;
@@ -861,7 +862,9 @@ static int decode_iccp_chunk(PNGDecContext *s, int length, AVFrame *f)
     if ((ret = decode_zbuf(&bp, s->gb.buffer, s->gb.buffer + length)) < 0)
         return ret;
 
-    av_bprint_finalize(&bp, (char **)&data);
+    ret = av_bprint_finalize(&bp, (char **)&data);
+    if (ret < 0)
+        return ret;
 
     sd = av_frame_new_side_data(f, AV_FRAME_DATA_ICC_PROFILE, bp.len);
     if (!sd) {
@@ -1165,7 +1168,7 @@ static int decode_frame_common(AVCodecContext *avctx, PNGDecContext *s,
     AVDictionary **metadatap = NULL;
     uint32_t tag, length;
     int decode_next_dat = 0;
-    int ret;
+    int i, ret;
 
     for (;;) {
         length = bytestream2_get_bytes_left(&s->gb);
@@ -1287,6 +1290,42 @@ static int decode_frame_common(AVCodecContext *avctx, PNGDecContext *s,
                 goto fail;
             break;
         }
+        case MKTAG('c', 'H', 'R', 'M'): {
+            AVMasteringDisplayMetadata *mdm = av_mastering_display_metadata_create_side_data(p);
+            if (!mdm) {
+                ret = AVERROR(ENOMEM);
+                goto fail;
+            }
+
+            mdm->white_point[0] = av_make_q(bytestream2_get_be32(&s->gb), 100000);
+            mdm->white_point[1] = av_make_q(bytestream2_get_be32(&s->gb), 100000);
+
+            /* RGB Primaries */
+            for (i = 0; i < 3; i++) {
+                mdm->display_primaries[i][0] = av_make_q(bytestream2_get_be32(&s->gb), 100000);
+                mdm->display_primaries[i][1] = av_make_q(bytestream2_get_be32(&s->gb), 100000);
+            }
+
+            mdm->has_primaries = 1;
+            bytestream2_skip(&s->gb, 4); /* crc */
+            break;
+        }
+        case MKTAG('g', 'A', 'M', 'A'): {
+            AVBPrint bp;
+            char *gamma_str;
+            int num = bytestream2_get_be32(&s->gb);
+
+            av_bprint_init(&bp, 0, -1);
+            av_bprintf(&bp, "%i/%i", num, 100000);
+            ret = av_bprint_finalize(&bp, &gamma_str);
+            if (ret < 0)
+                return ret;
+
+            av_dict_set(&p->metadata, "gamma", gamma_str, AV_DICT_DONT_STRDUP_VAL);
+
+            bytestream2_skip(&s->gb, 4); /* crc */
+            break;
+        }
         case MKTAG('I', 'E', 'N', 'D'):
             if (!(s->pic_state & PNG_ALLIMAGE))
                 av_log(avctx, AV_LOG_ERROR, "IEND without all image\n");