ffmpeg roll of source to mar 9 version...

patched-ffmpeg-mt/libavcodec/dnxhddec.c

 /*
  * VC3/DNxHD decoder.
  * Copyright (c) 2007 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>
  *
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
@@ skipping 21 matching lines @@
     AVFrame picture;
     GetBitContext gb;
     int cid;                            ///< compression id
     unsigned int width, height;
     unsigned int mb_width, mb_height;
     uint32_t mb_scan_index[68];         /* max for 1080p */
     int cur_field;                      ///< current interlaced field
     VLC ac_vlc, dc_vlc, run_vlc;
     int last_dc[3];
     DSPContext dsp;
-    DECLARE_ALIGNED_16(DCTELEM, blocks)[8][64];
+    DECLARE_ALIGNED(16, DCTELEM, blocks)[8][64];
     ScanTable scantable;
     const CIDEntry *cid_table;
 } DNXHDContext;
 
 #define DNXHD_VLC_BITS 9
 #define DNXHD_DC_VLC_BITS 7
 
 static av_cold int dnxhd_decode_init(AVCodecContext *avctx)
 {
     DNXHDContext *ctx = avctx->priv_data;
@@ skipping 66 matching lines @@
         return -1;
 
     if (buf_size < ctx->cid_table->coding_unit_size) {
         av_log(ctx->avctx, AV_LOG_ERROR, "incorrect frame size\n");
         return -1;
     }
 
     ctx->mb_width = ctx->width>>4;
     ctx->mb_height = buf[0x16d];
 
-    if (ctx->mb_height > 68) {
-        av_log(ctx->avctx, AV_LOG_ERROR, "mb height too big\n");
+    dprintf(ctx->avctx, "mb width %d, mb height %d\n", ctx->mb_width, ctx->mb_height);
+
+    if ((ctx->height+15)>>4 == ctx->mb_height && ctx->picture.interlaced_frame)
+        ctx->height <<= 1;
+
+    if (ctx->mb_height > 68 ||
+        (ctx->mb_height<<ctx->picture.interlaced_frame) > (ctx->height+15)>>4) {
+        av_log(ctx->avctx, AV_LOG_ERROR, "mb height too big: %d\n", ctx->mb_height);
         return -1;
     }
 
-    dprintf(ctx->avctx, "mb width %d, mb height %d\n", ctx->mb_width, ctx->mb_height);
     for (i = 0; i < ctx->mb_height; i++) {
         ctx->mb_scan_index[i] = AV_RB32(buf + 0x170 + (i<<2));
         dprintf(ctx->avctx, "mb scan index %d\n", ctx->mb_scan_index[i]);
         if (buf_size < ctx->mb_scan_index[i] + 0x280) {
             av_log(ctx->avctx, AV_LOG_ERROR, "invalid mb scan index\n");
             return -1;
         }
     }
 
     return 0;
@@ skipping 140 matching lines @@
     DNXHDContext *ctx = avctx->priv_data;
     AVFrame *picture = data;
     int first_field = 1;
 
     dprintf(avctx, "frame size %d\n", buf_size);
 
  decode_coding_unit:
     if (dnxhd_decode_header(ctx, buf, buf_size, first_field) < 0)
         return -1;
 
+    if ((avctx->width || avctx->height) &&
+        (ctx->width != avctx->width || ctx->height != avctx->height)) {
+        av_log(avctx, AV_LOG_WARNING, "frame size changed: %dx%d -> %dx%d\n",
+               avctx->width, avctx->height, ctx->width, ctx->height);
+        first_field = 1;
+    }
+
     avctx->pix_fmt = PIX_FMT_YUV422P;
     if (avcodec_check_dimensions(avctx, ctx->width, ctx->height))
         return -1;
     avcodec_set_dimensions(avctx, ctx->width, ctx->height);
 
     if (first_field) {
         if (ctx->picture.data[0])
             avctx->release_buffer(avctx, &ctx->picture);
         if (avctx->get_buffer(avctx, &ctx->picture) < 0) {
             av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
@@ skipping 32 matching lines @@
     CODEC_TYPE_VIDEO,
     CODEC_ID_DNXHD,
     sizeof(DNXHDContext),
     dnxhd_decode_init,
     NULL,
     dnxhd_decode_close,
     dnxhd_decode_frame,
     CODEC_CAP_DR1,
     .long_name = NULL_IF_CONFIG_SMALL("VC3/DNxHD"),
 };