Merge palette-only header with actual video frame.

This fixes the video frame pts (off by one for each MVIh)
and makes the "key frames" decode stand-alone (MVIh
contains only palette, such a palette-only frame being
marked as key frame is not really correct).
Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>

libavcodec/eacmv.c

@@ -162,8 +162,11 @@ static int cmv_decode_frame(AVCodecContext *avctx,
         return AVERROR_INVALIDDATA;
 
     if (AV_RL32(buf)==MVIh_TAG||AV_RB32(buf)==MVIh_TAG) {
+        unsigned size = AV_RL32(buf + 4);
         cmv_process_header(s, buf+EA_PREAMBLE_SIZE, buf_end);
-        return buf_size;
+        if (size > buf_end - buf - EA_PREAMBLE_SIZE)
+            return -1;
+        buf += size;
     }
 
     if (av_image_check_size(s->width, s->height, 0, s->avctx))

libavformat/electronicarts.c

@@ -469,11 +469,12 @@ static int ea_read_packet(AVFormatContext *s,
     AVIOContext *pb = s->pb;
     int ret = 0;
     int packet_read = 0;
+    int partial_packet = 0;
     unsigned int chunk_type, chunk_size;
     int key = 0;
     int av_uninit(num_samples);
 
-    while (!packet_read) {
+    while (!packet_read || partial_packet) {
         chunk_type = avio_rl32(pb);
         chunk_size = (ea->big_endian ? avio_rb32(pb) : avio_rl32(pb)) - 8;
 
@@ -496,6 +497,11 @@ static int ea_read_packet(AVFormatContext *s,
                 avio_skip(pb, 8);
                 chunk_size -= 12;
             }
+            if (partial_packet) {
+                av_log_ask_for_sample(s, "video header followed by audio packet not supported.\n");
+                av_free_packet(pkt);
+                partial_packet = 0;
+            }
             ret = av_get_packet(pb, pkt, chunk_size);
             if (ret < 0)
                 return ret;
@@ -558,9 +564,15 @@ static int ea_read_packet(AVFormatContext *s,
             key = AV_PKT_FLAG_KEY;
         case MV0F_TAG:
 get_video_packet:
-            ret = av_get_packet(pb, pkt, chunk_size);
-            if (ret < 0)
-                return ret;
+            if (partial_packet) {
+                ret = av_append_packet(pb, pkt, chunk_size);
+            } else
+                ret = av_get_packet(pb, pkt, chunk_size);
+            if (ret < 0) {
+                packet_read = 1;
+                break;
+            }
+            partial_packet = chunk_type == MVIh_TAG;
             pkt->stream_index = ea->video_stream_index;
             pkt->flags |= key;
             packet_read = 1;
@@ -572,6 +584,8 @@ get_video_packet:
         }
     }
 
+    if (ret < 0 && partial_packet)
+        av_free_packet(pkt);
     return ret;
 }