From f37b9768f64f859c67b8592eca618c5d82509025 Mon Sep 17 00:00:00 2001
From: Loren Merritt <lorenm@u.washington.edu>
Date: Sun, 28 Nov 2004 18:29:38 +0000
Subject: split ffhuffyuv into 2 codecs: "huffyuv" is compatible with the
 official version "ffvhuff" contains our improvements

Originally committed as revision 3720 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/huffyuv.c | 60 +++++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 48 insertions(+), 12 deletions(-)

(limited to 'libavcodec/huffyuv.c')

diff --git a/libavcodec/huffyuv.c b/libavcodec/huffyuv.c
index 99925dde96..d529268ada 100644
--- a/libavcodec/huffyuv.c
+++ b/libavcodec/huffyuv.c
@@ -495,10 +495,6 @@ static int encode_init(AVCodecContext *avctx)
     
     switch(avctx->pix_fmt){
     case PIX_FMT_YUV420P:
-        if(avctx->strict_std_compliance>=0){
-            av_log(avctx, AV_LOG_ERROR, "Warning: YV12-huffyuv is not supported by windows huffyuv use a different colorspace or use (v)strict=-1\n");
-            return -1;
-        }
         s->bitstream_bpp= 12;
         break;
     case PIX_FMT_YUV422P:
@@ -512,22 +508,30 @@ static int encode_init(AVCodecContext *avctx)
     s->decorrelate= s->bitstream_bpp >= 24;
     s->predictor= avctx->prediction_method;
     s->interlaced= avctx->flags&CODEC_FLAG_INTERLACED_ME ? 1 : 0;
-    if(s->interlaced != ( height > 288 )){
-        av_log(avctx, AV_LOG_INFO, "using huffyuv 2.2.0 or newer interlacing flag\n");
-    }
     if(avctx->context_model==1){
         s->context= avctx->context_model;
-        if(avctx->strict_std_compliance>=0){
-            av_log(avctx, AV_LOG_ERROR, "Warning: per-frame huffman tables are not supported by windows huffyuv; use context=0 or use (v)strict=-1\n");
-            return -1;
-        }
         if(s->flags & (CODEC_FLAG_PASS1|CODEC_FLAG_PASS2)){
             av_log(avctx, AV_LOG_ERROR, "context=1 is not compatible with 2 pass huffyuv encoding\n");
             return -1;
         }
-        av_log(avctx, AV_LOG_INFO, "using per-frame huffman tables\n");
     }else s->context= 0;
     
+    if(avctx->codec->id==CODEC_ID_HUFFYUV){
+        if(avctx->pix_fmt==PIX_FMT_YUV420P){
+            av_log(avctx, AV_LOG_ERROR, "Error: YV12 is not supported by huffyuv; use vcodec=ffvhuff or format=422p\n");
+            return -1;
+        }
+        if(avctx->context_model){
+            av_log(avctx, AV_LOG_ERROR, "Error: per-frame huffman tables are not supported by huffyuv; use vcodec=ffvhuff\n");
+            return -1;
+        }
+        if(s->interlaced != ( height > 288 ))
+            av_log(avctx, AV_LOG_INFO, "using huffyuv 2.2.0 or newer interlacing flag\n");
+    }else if(avctx->strict_std_compliance>=0){
+        av_log(avctx, AV_LOG_ERROR, "This codec is under development; files encoded with it may not be decodeable with future versions!!! Set vstrict=-1 to use it anyway.\n");
+        return -1;
+    }
+    
     ((uint8_t*)avctx->extradata)[0]= s->predictor;
     ((uint8_t*)avctx->extradata)[1]= s->bitstream_bpp;
     ((uint8_t*)avctx->extradata)[2]= 0x20 | (s->interlaced ? 0x10 : 0);
@@ -1172,6 +1176,14 @@ static const AVOption huffyuv_options[] =
     AVOPTION_END()
 };
 
+static const AVOption ffvhuff_options[] =
+{
+    AVOPTION_CODEC_INT("prediction_method", "prediction_method", prediction_method, 0, 2, 0),
+    AVOPTION_CODEC_INT("context_model", "context_model", context_model, 0, 2, 0),
+    AVOPTION_END()
+};
+
+
 AVCodec huffyuv_decoder = {
     "huffyuv",
     CODEC_TYPE_VIDEO,
@@ -1185,6 +1197,19 @@ AVCodec huffyuv_decoder = {
     NULL
 };
 
+AVCodec ffvhuff_decoder = {
+    "ffvhuff",
+    CODEC_TYPE_VIDEO,
+    CODEC_ID_FFVHUFF,
+    sizeof(HYuvContext),
+    decode_init,
+    NULL,
+    decode_end,
+    decode_frame,
+    CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND,
+    NULL
+};
+
 #ifdef CONFIG_ENCODERS
 
 AVCodec huffyuv_encoder = {
@@ -1198,4 +1223,15 @@ AVCodec huffyuv_encoder = {
     .options = huffyuv_options,
 };
 
+AVCodec ffvhuff_encoder = {
+    "ffvhuff",
+    CODEC_TYPE_VIDEO,
+    CODEC_ID_FFVHUFF,
+    sizeof(HYuvContext),
+    encode_init,
+    encode_frame,
+    encode_end,
+    .options = ffvhuff_options,
+};
+
 #endif //CONFIG_ENCODERS
-- 
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