hevc: templatize intra_pred

[ffmpeg] / libavcodec / dfa.c

diff --git a/libavcodec/dfa.c b/libavcodec/dfa.c
index 4f148336f470527fd68089ca652c752fcd474e55..6fa4edc4005c32cf0595831e4ec4147efdd4402e 100644 (file)
--- a/libavcodec/dfa.c
+++ b/libavcodec/dfa.c
@@ -20,6 +20,8 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include <inttypes.h>
+
 #include "avcodec.h"
 #include "bytestream.h"
 #include "internal.h"
@@ -28,8 +30,6 @@
 #include "libavutil/mem.h"
 
 typedef struct DfaContext {
-    AVFrame pic;
-
     uint32_t pal[256];
     uint8_t *frame_buf;
 } DfaContext;
@@ -257,6 +257,8 @@ static int decode_wdlt(GetByteContext *gb, uint8_t *frame, int width, int height
             segments = bytestream2_get_le16(gb);
         }
         line_ptr = frame;
+        if (frame_end - frame < width)
+            return AVERROR_INVALIDDATA;
         frame += width;
         y++;
         while (segments--) {
@@ -284,9 +286,26 @@ static int decode_wdlt(GetByteContext *gb, uint8_t *frame, int width, int height
     return 0;
 }
 
-static int decode_unk6(GetByteContext *gb, uint8_t *frame, int width, int height)
+static int decode_tdlt(GetByteContext *gb, uint8_t *frame, int width, int height)
 {
-    return AVERROR_PATCHWELCOME;
+    const uint8_t *frame_end = frame + width * height;
+    int segments = bytestream2_get_le32(gb);
+    int skip, copy;
+
+    while (segments--) {
+        if (bytestream2_get_bytes_left(gb) < 2)
+            return AVERROR_INVALIDDATA;
+        copy = bytestream2_get_byteu(gb) * 2;
+        skip = bytestream2_get_byteu(gb) * 2;
+        if (frame_end - frame < copy + skip ||
+            bytestream2_get_bytes_left(gb) < copy)
+            return AVERROR_INVALIDDATA;
+        frame += skip;
+        bytestream2_get_buffer(gb, frame, copy);
+        frame += copy;
+    }
+
+    return 0;
 }
 
 static int decode_blck(GetByteContext *gb, uint8_t *frame, int width, int height)
@@ -300,17 +319,18 @@ typedef int (*chunk_decoder)(GetByteContext *gb, uint8_t *frame, int width, int
 
 static const chunk_decoder decoder[8] = {
     decode_copy, decode_tsw1, decode_bdlt, decode_wdlt,
-    decode_unk6, decode_dsw1, decode_blck, decode_dds1,
+    decode_tdlt, decode_dsw1, decode_blck, decode_dds1,
 };
 
 static const char* chunk_name[8] = {
-    "COPY", "TSW1", "BDLT", "WDLT", "????", "DSW1", "BLCK", "DDS1"
+    "COPY", "TSW1", "BDLT", "WDLT", "TDLT", "DSW1", "BLCK", "DDS1"
 };
 
 static int dfa_decode_frame(AVCodecContext *avctx,
-                            void *data, int *data_size,
+                            void *data, int *got_frame,
                             AVPacket *avpkt)
 {
+    AVFrame *frame = data;
     DfaContext *s = avctx->priv_data;
     GetByteContext gb;
     const uint8_t *buf = avpkt->data;
@@ -319,10 +339,7 @@ static int dfa_decode_frame(AVCodecContext *avctx,
     int ret;
     int i, pal_elems;
 
-    if (s->pic.data[0])
-        avctx->release_buffer(avctx, &s->pic);
-
-    if ((ret = ff_get_buffer(avctx, &s->pic))) {
+    if ((ret = ff_get_buffer(avctx, frame, 0))) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
@@ -340,7 +357,7 @@ static int dfa_decode_frame(AVCodecContext *avctx,
                 s->pal[i] = bytestream2_get_be24(&gb) << 2;
                 s->pal[i] |= (s->pal[i] >> 6) & 0x333;
             }
-            s->pic.palette_has_changed = 1;
+            frame->palette_has_changed = 1;
         } else if (chunk_type <= 9) {
             if (decoder[chunk_type - 2](&gb, s->frame_buf, avctx->width, avctx->height)) {
                 av_log(avctx, AV_LOG_ERROR, "Error decoding %s chunk\n",
@@ -348,23 +365,23 @@ static int dfa_decode_frame(AVCodecContext *avctx,
                 return AVERROR_INVALIDDATA;
             }
         } else {
-            av_log(avctx, AV_LOG_WARNING, "Ignoring unknown chunk type %d\n",
+            av_log(avctx, AV_LOG_WARNING,
+                   "Ignoring unknown chunk type %"PRIu32"\n",
                    chunk_type);
         }
         buf += chunk_size;
     }
 
     buf = s->frame_buf;
-    dst = s->pic.data[0];
+    dst = frame->data[0];
     for (i = 0; i < avctx->height; i++) {
         memcpy(dst, buf, avctx->width);
-        dst += s->pic.linesize[0];
+        dst += frame->linesize[0];
         buf += avctx->width;
     }
-    memcpy(s->pic.data[1], s->pal, sizeof(s->pal));
+    memcpy(frame->data[1], s->pal, sizeof(s->pal));
 
-    *data_size = sizeof(AVFrame);
-    *(AVFrame*)data = s->pic;
+    *got_frame = 1;
 
     return avpkt->size;
 }
@@ -373,9 +390,6 @@ static av_cold int dfa_decode_end(AVCodecContext *avctx)
 {
     DfaContext *s = avctx->priv_data;
 
-    if (s->pic.data[0])
-        avctx->release_buffer(avctx, &s->pic);
-
     av_freep(&s->frame_buf);
 
     return 0;
@@ -383,6 +397,7 @@ static av_cold int dfa_decode_end(AVCodecContext *avctx)
 
 AVCodec ff_dfa_decoder = {
     .name           = "dfa",
+    .long_name      = NULL_IF_CONFIG_SMALL("Chronomaster DFA"),
     .type           = AVMEDIA_TYPE_VIDEO,
     .id             = AV_CODEC_ID_DFA,
     .priv_data_size = sizeof(DfaContext),
@@ -390,5 +405,4 @@ AVCodec ff_dfa_decoder = {
     .close          = dfa_decode_end,
     .decode         = dfa_decode_frame,
     .capabilities   = CODEC_CAP_DR1,
-    .long_name      = NULL_IF_CONFIG_SMALL("Chronomaster DFA"),
 };