1 files changed, 157 insertions, 0 deletions
diff --git a/ffmpeg/libavfilter/video.c b/ffmpeg/libavfilter/video.c
new file mode 100644
index 0000000..b274070
--- /dev/null
+++ b/ffmpeg/libavfilter/video.c
@@ -0,0 +1,157 @@
+/*
+ * Copyright 2007 Bobby Bingham
+ * Copyright Stefano Sabatini <stefasab gmail com>
+ * Copyright Vitor Sessak <vitor1001 gmail 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.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <string.h>
+#include <stdio.h>
+
+#include "libavutil/avassert.h"
+#include "libavutil/buffer.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/mem.h"
+
+#include "avfilter.h"
+#include "internal.h"
+#include "video.h"
+
+AVFrame *ff_null_get_video_buffer(AVFilterLink *link, int w, int h)
+{
+    return ff_get_video_buffer(link->dst->outputs[0], w, h);
+}
+
+/* TODO: set the buffer's priv member to a context structure for the whole
+ * filter chain.  This will allow for a buffer pool instead of the constant
+ * alloc & free cycle currently implemented. */
+AVFrame *ff_default_get_video_buffer(AVFilterLink *link, int w, int h)
+{
+    AVFrame *frame = av_frame_alloc();
+    int ret;
+
+#if 0 //POOL
+    AVFilterPool *pool = link->pool;
+    if (pool) {
+        for (i = 0; i < POOL_SIZE; i++) {
+            picref = pool->pic[i];
+            if (picref && picref->buf->format == link->format && picref->buf->w == w && picref->buf->h == h) {
+                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;
+                picref->format = link->format;
+                pic->refcount = 1;
+                memcpy(picref->data,     pic->data,     sizeof(picref->data));
+                memcpy(picref->linesize, pic->linesize, sizeof(picref->linesize));
+                pool->refcount++;
+                return picref;
+            }
+        }
+    } else {
+        pool = link->pool = av_mallocz(sizeof(AVFilterPool));
+        pool->refcount = 1;
+    }
+#endif
+    if (!frame)
+        return NULL;
+
+    frame->width  = w;
+    frame->height = h;
+    frame->format = link->format;
+
+    ret = av_frame_get_buffer(frame, 32);
+    if (ret < 0)
+        av_frame_free(&frame);
+
+#if 0 //POOL
+    memset(data[0], 128, i);
+
+    picref->buf->priv = pool;
+    picref->buf->free = NULL;
+    pool->refcount++;
+#endif
+
+    return frame;
+}
+
+#if FF_API_AVFILTERBUFFER
+AVFilterBufferRef *
+avfilter_get_video_buffer_ref_from_arrays(uint8_t * const data[4], const int linesize[4], int perms,
+                                          int w, int h, enum AVPixelFormat format)
+{
+    AVFilterBuffer *pic = av_mallocz(sizeof(AVFilterBuffer));
+    AVFilterBufferRef *picref = av_mallocz(sizeof(AVFilterBufferRef));
+
+    if (!pic || !picref)
+        goto fail;
+
+    picref->buf = pic;
+    picref->buf->free = ff_avfilter_default_free_buffer;
+    if (!(picref->video = av_mallocz(sizeof(AVFilterBufferRefVideoProps))))
+        goto fail;
+
+    pic->w = picref->video->w = w;
+    pic->h = picref->video->h = h;
+
+    /* make sure the buffer gets read permission or it's useless for output */
+    picref->perms = perms | AV_PERM_READ;
+
+    pic->refcount = 1;
+    picref->type = AVMEDIA_TYPE_VIDEO;
+    pic->format = picref->format = format;
+
+    memcpy(pic->data,        data,          4*sizeof(data[0]));
+    memcpy(pic->linesize,    linesize,      4*sizeof(linesize[0]));
+    memcpy(picref->data,     pic->data,     sizeof(picref->data));
+    memcpy(picref->linesize, pic->linesize, sizeof(picref->linesize));
+
+    pic->   extended_data = pic->data;
+    picref->extended_data = picref->data;
+
+    picref->pts = AV_NOPTS_VALUE;
+
+    return picref;
+
+fail:
+    if (picref && picref->video)
+        av_free(picref->video);
+    av_free(picref);
+    av_free(pic);
+    return NULL;
+}
+#endif
+
+AVFrame *ff_get_video_buffer(AVFilterLink *link, int w, int h)
+{
+    AVFrame *ret = NULL;
+
+    av_unused char buf[16];
+    FF_TPRINTF_START(NULL, get_video_buffer); ff_tlog_link(NULL, link, 0);
+
+    if (link->dstpad->get_video_buffer)
+        ret = link->dstpad->get_video_buffer(link, w, h);
+
+    if (!ret)
+        ret = ff_default_get_video_buffer(link, w, h);
+
+    return ret;
+}