bethsoftvideo: return proper consumed size for palette packets.

Also check for sufficient packet size.

libavcodec/bethsoftvideo.c

@@ -46,14 +46,19 @@ static av_cold int bethsoftvid_decode_init(AVCodecContext *avctx)
     return 0;
 }
 
-static void set_palette(AVFrame * frame, const uint8_t * palette_buffer)
+static int set_palette(AVFrame * frame, const uint8_t * palette_buffer, int buf_size)
 {
     uint32_t * palette = (uint32_t *)frame->data[1];
     int a;
+
+    if (buf_size < 256*3)
+        return AVERROR_INVALIDDATA;
+
     for(a = 0; a < 256; a++){
         palette[a] = AV_RB24(&palette_buffer[a * 3]) * 4;
     }
     frame->palette_has_changed = 1;
+    return 256*3;
 }
 
 static int bethsoftvid_decode_frame(AVCodecContext *avctx,
@@ -80,8 +85,7 @@ static int bethsoftvid_decode_frame(AVCodecContext *avctx,
 
     switch(block_type = *buf++){
         case PALETTE_BLOCK:
-            set_palette(&vid->frame, buf);
-            return 0;
+            return set_palette(&vid->frame, buf, buf_size);
         case VIDEO_YOFF_P_FRAME:
             yoffset = bytestream_get_le16(&buf);
             if(yoffset >= avctx->height)

tests/ref/fate/bethsoft-vid

-0, 0, 192000, 0x00000000
+0, 0, 192000, 0xdecc683b
 1, 0, 1480, 0x00000000
-0, 1500, 192000, 0x01a6cf45
-0, 3000, 192000, 0xd07d57e9
-0, 4500, 192000, 0x3cb1dff5
+0, 1500, 192000, 0x00000000
+0, 3000, 192000, 0x01a6cf45
+0, 4500, 192000, 0xd07d57e9
 1, 5994, 1480, 0x20a92bd4
-0, 6000, 192000, 0xd1aaa8fb
-0, 7500, 192000, 0x75f526cd
-0, 9000, 192000, 0x0f673577
-0, 10500, 192000, 0x897b6781
+0, 6000, 192000, 0x3cb1dff5
+0, 7500, 192000, 0xd1aaa8fb
+0, 9000, 192000, 0x75f526cd
+0, 10500, 192000, 0x0f673577
 1, 11988, 1850, 0xa9e48a74
-0, 12000, 192000, 0x81e6b7f7
-0, 13500, 192000, 0x1f45ce61
-0, 15000, 192000, 0x5a0772a6
-0, 16500, 192000, 0xf78732b3
-0, 18000, 192000, 0x8427f9e5
+0, 12000, 192000, 0x897b6781
+0, 13500, 192000, 0x81e6b7f7
+0, 15000, 192000, 0x1f45ce61
+0, 16500, 192000, 0x5a0772a6
+0, 18000, 192000, 0xf78732b3
 1, 19481, 1480, 0x23ecd018
-0, 19500, 192000, 0x40473f11
-0, 21000, 192000, 0x173ceebe
-0, 22500, 192000, 0x136b9516
-0, 24000, 192000, 0x138d11ae
+0, 19500, 192000, 0x8427f9e5
+0, 21000, 192000, 0x40473f11
+0, 22500, 192000, 0x173ceebe
+0, 24000, 192000, 0x136b9516
 1, 25475, 1480, 0x206bb915
-0, 25500, 192000, 0x063dbff3
-0, 27000, 192000, 0x5280852f
-0, 28500, 192000, 0x99943a8f
-0, 30000, 192000, 0x0330a728
+0, 25500, 192000, 0x138d11ae
+0, 27000, 192000, 0x063dbff3
+0, 28500, 192000, 0x5280852f
+0, 30000, 192000, 0x99943a8f
 1, 31469, 1850, 0xb0e10e75
-0, 31500, 192000, 0x5d35467d
-0, 33000, 192000, 0xfd436343
-0, 34500, 192000, 0xc323fcfe
-0, 36000, 192000, 0x2a1530a0
-0, 37500, 192000, 0xbd43bb60
+0, 31500, 192000, 0x0330a728
+0, 33000, 192000, 0x5d35467d
+0, 34500, 192000, 0xfd436343
+0, 36000, 192000, 0xc323fcfe
+0, 37500, 192000, 0x2a1530a0
 1, 38961, 1480, 0x8d9baedd
-0, 39000, 192000, 0xa47f5eab
-0, 40500, 192000, 0xff17f5f7
-0, 42000, 192000, 0xb4140b55
-0, 43500, 192000, 0xb8782cc4
+0, 39000, 192000, 0xbd43bb60
+0, 40500, 192000, 0xa47f5eab
+0, 42000, 192000, 0xff17f5f7
+0, 43500, 192000, 0xb4140b55
 1, 44955, 1480, 0xb802aae1
-0, 45000, 192000, 0x92975b8b
-0, 46500, 192000, 0xf42a64d6
-0, 48000, 192000, 0x2cc7077d
-0, 49500, 192000, 0x00080cc8
+0, 45000, 192000, 0xb8782cc4
+0, 46500, 192000, 0x92975b8b
+0, 48000, 192000, 0xf42a64d6
+0, 49500, 192000, 0x2cc7077d
 1, 50950, 1480, 0xecd7b5cc
-0, 51000, 192000, 0x584b48f3
-0, 52500, 192000, 0xd68f57da
-0, 54000, 192000, 0x60158422
-0, 55500, 192000, 0xd7fb89e6
+0, 51000, 192000, 0x00080cc8
+0, 52500, 192000, 0x584b48f3
+0, 54000, 192000, 0xd68f57da
+0, 55500, 192000, 0x60158422
 1, 56944, 1850, 0x16861355
-0, 57000, 192000, 0x97f1c76a
-0, 58500, 192000, 0x46c4bb9e
-0, 60000, 192000, 0xd32f9b66
-0, 61500, 192000, 0x74f43886
-0, 63000, 192000, 0x3c4e47df
+0, 57000, 192000, 0xd7fb89e6
+0, 58500, 192000, 0x97f1c76a
+0, 60000, 192000, 0x46c4bb9e
+0, 61500, 192000, 0xd32f9b66
+0, 63000, 192000, 0x74f43886
 1, 64436, 1480, 0xa51690bd
-0, 64500, 192000, 0xb5ac0a58
-0, 66000, 192000, 0xcc572b31
-0, 67500, 192000, 0xb1739d26
-0, 69000, 192000, 0x73da5473
+0, 64500, 192000, 0x3c4e47df
+0, 66000, 192000, 0xb5ac0a58
+0, 67500, 192000, 0xcc572b31
+0, 69000, 192000, 0xb1739d26
 1, 70430, 1480, 0xdd0b90d1
-0, 70500, 192000, 0x5f79f5bc
-0, 72000, 192000, 0x0affc0a0
-0, 73500, 192000, 0x2b4d5c1c
-0, 75000, 192000, 0x309b41bc
+0, 70500, 192000, 0x73da5473
+0, 72000, 192000, 0x5f79f5bc
+0, 73500, 192000, 0x0affc0a0
+0, 75000, 192000, 0x2b4d5c1c
 1, 76424, 1850, 0x3ce6e333
-0, 76500, 192000, 0xd42b6424
-0, 78000, 192000, 0x4795c948
-0, 79500, 192000, 0xbc1a3a8b
-0, 81000, 192000, 0x16529c5b
-0, 82500, 192000, 0x6b1b31ba
+0, 76500, 192000, 0x309b41bc
+0, 78000, 192000, 0xd42b6424
+0, 79500, 192000, 0x4795c948
+0, 81000, 192000, 0xbc1a3a8b
+0, 82500, 192000, 0x16529c5b
 1, 83917, 1480, 0xf8ce8ea3
-0, 84000, 192000, 0x569182ce
-0, 85500, 192000, 0xe6ea9866
-0, 87000, 192000, 0x102c6076
-0, 88500, 192000, 0xb29f527a
+0, 84000, 192000, 0x6b1b31ba
+0, 85500, 192000, 0x569182ce
+0, 87000, 192000, 0xe6ea9866
+0, 88500, 192000, 0x102c6076
 1, 89911, 1480, 0xda4597af
-0, 90000, 192000, 0x040b4eee
-0, 91500, 192000, 0x92574f4a
-0, 93000, 192000, 0x1e8acdce
-0, 94500, 192000, 0x1becf516
+0, 90000, 192000, 0xb29f527a
+0, 91500, 192000, 0x040b4eee
+0, 93000, 192000, 0x92574f4a
+0, 94500, 192000, 0x1e8acdce
 1, 95905, 1480, 0x918f7cb3
-0, 96000, 192000, 0xb62e9776
-0, 97500, 192000, 0xed37a08e
-0, 99000, 192000, 0xc0719912
-0, 100500, 192000, 0x24cf7a7e
+0, 96000, 192000, 0x1becf516
+0, 97500, 192000, 0xb62e9776
+0, 99000, 192000, 0xed37a08e
+0, 100500, 192000, 0xc0719912
 1, 101899, 1850, 0xca6edb15
-0, 102000, 192000, 0x0307f62f
-0, 103500, 192000, 0x79b7417b
+0, 102000, 192000, 0x24cf7a7e
+0, 103500, 192000, 0x0307f62f
+0, 105000, 192000, 0x79b7417b
 1, 109392, 1480, 0xba279597
 1, 115386, 1480, 0xc5a38a9e
 1, 121380, 1850, 0x8147eef5