X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fkgv1dec.c;h=0bf322eabcef632bac433d308b6f83b4f849ea82;hb=cab63a8b594cdc365bb2581a12b3ac8e6dd480b2;hp=74ae6b7ffe1a1f35aec0091c7513b873c06e6c50;hpb=759001c534287a96dc96d1e274665feb7059145d;p=ffmpeg

diff --git a/libavcodec/kgv1dec.c b/libavcodec/kgv1dec.c
index 74ae6b7ffe1..0bf322eabce 100644
--- a/libavcodec/kgv1dec.c
+++ b/libavcodec/kgv1dec.c
@@ -30,16 +30,18 @@
 #include "avcodec.h"
 #include "internal.h"
 
-typedef struct {
+typedef struct KgvContext {
     AVCodecContext *avctx;
-    AVFrame prev;
+    uint16_t *frame_buffer;
+    uint16_t *last_frame_buffer;
 } KgvContext;
 
 static void decode_flush(AVCodecContext *avctx)
 {
     KgvContext * const c = avctx->priv_data;
 
-    av_frame_unref(&c->prev);
+    av_freep(&c->frame_buffer);
+    av_freep(&c->last_frame_buffer);
 }
 
 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
@@ -61,24 +63,28 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
     h = (buf[1] + 1) * 8;
     buf += 2;
 
-    if ((res = av_image_check_size(w, h, 0, avctx)) < 0)
-        return res;
-
     if (w != avctx->width || h != avctx->height) {
-        av_frame_unref(&c->prev);
-        avcodec_set_dimensions(avctx, w, h);
+        av_freep(&c->frame_buffer);
+        av_freep(&c->last_frame_buffer);
+        if ((res = ff_set_dimensions(avctx, w, h)) < 0)
+            return res;
+    }
+
+    if (!c->frame_buffer) {
+        c->frame_buffer      = av_mallocz(avctx->width * avctx->height * 2);
+        c->last_frame_buffer = av_mallocz(avctx->width * avctx->height * 2);
+        if (!c->frame_buffer || !c->last_frame_buffer) {
+            decode_flush(avctx);
+            return AVERROR(ENOMEM);
+        }
     }
 
     maxcnt = w * h;
 
-    if ((res = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF)) < 0)
+    if ((res = ff_get_buffer(avctx, frame, 0)) < 0)
         return res;
-    out  = (uint16_t *) frame->data[0];
-    if (c->prev.data[0]) {
-        prev = (uint16_t *) c->prev.data[0];
-    } else {
-        prev = NULL;
-    }
+    out  = c->frame_buffer;
+    prev = c->last_frame_buffer;
 
     for (i = 0; i < 8; i++)
         offsets[i] = -1;
@@ -154,9 +160,10 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
     if (outcnt - maxcnt)
         av_log(avctx, AV_LOG_DEBUG, "frame finished with %d diff\n", outcnt - maxcnt);
 
-    av_frame_unref(&c->prev);
-    if ((res = av_frame_ref(&c->prev, frame)) < 0)
-        return res;
+    av_image_copy_plane(frame->data[0], frame->linesize[0],
+                        (const uint8_t*)c->frame_buffer,  avctx->width * 2,
+                        avctx->width * 2, avctx->height);
+    FFSWAP(uint16_t *, c->frame_buffer, c->last_frame_buffer);
 
     *got_frame = 1;
 
@@ -169,7 +176,6 @@ static av_cold int decode_init(AVCodecContext *avctx)
 
     c->avctx = avctx;
     avctx->pix_fmt = AV_PIX_FMT_RGB555;
-    avctx->flags  |= CODEC_FLAG_EMU_EDGE;
 
     return 0;
 }
@@ -182,6 +188,7 @@ static av_cold int decode_end(AVCodecContext *avctx)
 
 AVCodec ff_kgv1_decoder = {
     .name           = "kgv1",
+    .long_name      = NULL_IF_CONFIG_SMALL("Kega Game Video"),
     .type           = AVMEDIA_TYPE_VIDEO,
     .id             = AV_CODEC_ID_KGV1,
     .priv_data_size = sizeof(KgvContext),
@@ -189,6 +196,5 @@ AVCodec ff_kgv1_decoder = {
     .close          = decode_end,
     .decode         = decode_frame,
     .flush          = decode_flush,
-    .long_name      = NULL_IF_CONFIG_SMALL("Kega Game Video"),
-    .capabilities   = CODEC_CAP_DR1,
+    .capabilities   = AV_CODEC_CAP_DR1,
 };