libavfilter: pass QP table through the filter chain

Any volunteers to port the pp and spp filters from libmpcodec?
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavfilter/avcodec.c

@@ -42,6 +42,16 @@ int avfilter_copy_frame_props(AVFilterBufferRef *dst, const AVFrame *src)
         dst->video->top_field_first     = src->top_field_first;
         dst->video->key_frame           = src->key_frame;
         dst->video->pict_type           = src->pict_type;
+        av_freep(&dst->video->qp_table);
+        dst->video->qp_table_linesize = 0;
+        if (src->qscale_table) {
+            int qsize = src->qstride ? src->qstride * ((src->height+15)/16) : (src->width+15)/16;
+            dst->video->qp_table        = av_malloc(qsize);
+            if(!dst->video->qp_table)
+                return AVERROR(ENOMEM);
+            dst->video->qp_table_linesize       = src->qstride;
+            memcpy(dst->video->qp_table, src->qscale_table, qsize);
+        }
         break;
     case AVMEDIA_TYPE_AUDIO:
         dst->audio->sample_rate         = src->sample_rate;

libavfilter/avfilter.h

@@ -131,6 +131,8 @@ typedef struct AVFilterBufferRefVideoProps {
     int top_field_first;        ///< field order
     enum AVPictureType pict_type; ///< picture type of the frame
     int key_frame;              ///< 1 -> keyframe, 0-> not
+    int qp_table_linesize;                ///< qp_table stride
+    int8_t *qp_table;             ///< array of Quantization Parameters
 } AVFilterBufferRefVideoProps;
 
 /**

libavfilter/buffer.c

@@ -52,6 +52,11 @@ AVFilterBufferRef *avfilter_ref_buffer(AVFilterBufferRef *ref, int pmask)
             return NULL;
         }
         *ret->video = *ref->video;
+        if (ref->video->qp_table) {
+            int qsize = ref->video->qp_table_linesize ? ref->video->qp_table_linesize * ((ref->video->h+15)/16) : (ref->video->w+15)/16;
+            ret->video->qp_table = av_malloc(qsize);
+            memcpy(ret->video->qp_table, ref->video->qp_table, qsize);
+        }
         ret->extended_data = ret->data;
     } else if (ref->type == AVMEDIA_TYPE_AUDIO) {
         ret->audio = av_malloc(sizeof(AVFilterBufferRefAudioProps));
@@ -95,6 +100,7 @@ void ff_free_pool(AVFilterPool *pool)
             av_freep(&picref->buf);
 
             av_freep(&picref->audio);
+            av_assert0(!picref->video || !picref->video->qp_table);
             av_freep(&picref->video);
             av_freep(&pool->pic[i]);
             pool->count--;
@@ -116,6 +122,9 @@ static void store_in_pool(AVFilterBufferRef *ref)
     av_assert0(ref->buf->data[0]);
     av_assert0(pool->refcount>0);
 
+    if (ref->video)
+        av_freep(&ref->video->qp_table);
+
     if (pool->count == POOL_SIZE) {
         AVFilterBufferRef *ref1 = pool->pic[0];
         av_freep(&ref1->video);
@@ -155,6 +164,8 @@ void avfilter_unref_buffer(AVFilterBufferRef *ref)
     }
     if (ref->extended_data != ref->data)
         av_freep(&ref->extended_data);
+    if (ref->video)
+        av_freep(&ref->video->qp_table);
     av_freep(&ref->video);
     av_freep(&ref->audio);
     av_free(ref);
@@ -173,7 +184,17 @@ void avfilter_copy_buffer_ref_props(AVFilterBufferRef *dst, AVFilterBufferRef *s
     dst->pos             = src->pos;
 
     switch (src->type) {
-    case AVMEDIA_TYPE_VIDEO: *dst->video = *src->video; break;
+    case AVMEDIA_TYPE_VIDEO: {
+        if (dst->video->qp_table)
+            av_freep(&dst->video->qp_table);
+        *dst->video = *src->video;
+        if (src->video->qp_table) {
+            int qsize = src->video->qp_table_linesize ? src->video->qp_table_linesize * ((src->video->h+15)/16) : (src->video->w+15)/16;
+            dst->video->qp_table = av_malloc(qsize);
+            memcpy(dst->video->qp_table, src->video->qp_table, qsize);
+        }
+        break;
+    }
     case AVMEDIA_TYPE_AUDIO: *dst->audio = *src->audio; break;
     default: break;
     }

libavfilter/version.h

@@ -29,8 +29,8 @@
 #include "libavutil/avutil.h"
 
 #define LIBAVFILTER_VERSION_MAJOR  3
-#define LIBAVFILTER_VERSION_MINOR  15
-#define LIBAVFILTER_VERSION_MICRO 104
+#define LIBAVFILTER_VERSION_MINOR  16
+#define LIBAVFILTER_VERSION_MICRO 100
 
 #define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
                                                LIBAVFILTER_VERSION_MINOR, \

libavfilter/video.c

@@ -55,6 +55,7 @@ AVFilterBufferRef *ff_default_get_video_buffer(AVFilterLink *link, int perms, in
                 AVFilterBuffer *pic = picref->buf;
                 pool->pic[i] = NULL;
                 pool->count--;
+                av_assert0(!picref->video->qp_table);
                 picref->video->w = w;
                 picref->video->h = h;
                 picref->perms = full_perms;