1 files changed, 114 insertions, 65 deletions

diff --git a/libavfilter/vsrc_buffer.c b/libavfilter/vsrc_buffer.c
index 1f0233e..6ce2490 100644
--- a/libavfilter/vsrc_buffer.c
+++ b/libavfilter/vsrc_buffer.c
@@ -1,20 +1,20 @@
 /*
  * Copyright (c) 2008 Vitor Sessak
  *
- * This file is part of Libav.
+ * This file is part of FFmpeg.
  *
- * Libav is free software; you can redistribute it and/or
+ * 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.
  *
- * Libav is distributed in the hope that it will be useful,
+ * 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 Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
@@ -24,68 +24,135 @@
  */
 
 #include "avfilter.h"
+#include "internal.h"
+#include "avcodec.h"
 #include "vsrc_buffer.h"
 #include "libavutil/imgutils.h"
 
 typedef struct {
-    int64_t           pts;
-    AVFrame           frame;
-    int               has_frame;
+    AVFilterBufferRef *picref;
     int               h, w;
     enum PixelFormat  pix_fmt;
     AVRational        time_base;     ///< time_base to set in the output link
-    AVRational        pixel_aspect;
+    AVRational        sample_aspect_ratio;
+    char              sws_param[256];
 } BufferSourceContext;
 
-int av_vsrc_buffer_add_frame(AVFilterContext *buffer_filter, AVFrame *frame,
-                             int64_t pts, AVRational pixel_aspect)
+int av_vsrc_buffer_add_video_buffer_ref(AVFilterContext *buffer_filter,
+                                        AVFilterBufferRef *picref, int flags)
 {
     BufferSourceContext *c = buffer_filter->priv;
+    AVFilterLink *outlink = buffer_filter->outputs[0];
+    int ret;
+
+    if (c->picref) {
+        if (flags & AV_VSRC_BUF_FLAG_OVERWRITE) {
+            avfilter_unref_buffer(c->picref);
+            c->picref = NULL;
+        } else {
+            av_log(buffer_filter, AV_LOG_ERROR,
+                   "Buffering several frames is not supported. "
+                   "Please consume all available frames before adding a new one.\n");
+            return AVERROR(EINVAL);
+        }
+    }
+
+    if (picref->video->w != c->w || picref->video->h != c->h || picref->format != c->pix_fmt) {
+        AVFilterContext *scale = buffer_filter->outputs[0]->dst;
+        AVFilterLink *link;
+        char scale_param[1024];
+
+        av_log(buffer_filter, AV_LOG_INFO,
+               "Buffer video input changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
+               c->w, c->h, av_pix_fmt_descriptors[c->pix_fmt].name,
+               picref->video->w, picref->video->h, av_pix_fmt_descriptors[picref->format].name);
+
+        if (!scale || strcmp(scale->filter->name, "scale")) {
+            AVFilter *f = avfilter_get_by_name("scale");
+
+            av_log(buffer_filter, AV_LOG_INFO, "Inserting scaler filter\n");
+            if ((ret = avfilter_open(&scale, f, "Input equalizer")) < 0)
+                return ret;
+
+            snprintf(scale_param, sizeof(scale_param)-1, "%d:%d:%s", c->w, c->h, c->sws_param);
+            if ((ret = avfilter_init_filter(scale, scale_param, NULL)) < 0) {
+                avfilter_free(scale);
+                return ret;
+            }
+
+            if ((ret = avfilter_insert_filter(buffer_filter->outputs[0], scale, 0, 0)) < 0) {
+                avfilter_free(scale);
+                return ret;
+            }
+            scale->outputs[0]->time_base = scale->inputs[0]->time_base;
+
+            scale->outputs[0]->format= c->pix_fmt;
+        } else if (!strcmp(scale->filter->name, "scale")) {
+            snprintf(scale_param, sizeof(scale_param)-1, "%d:%d:%s",
+                     scale->outputs[0]->w, scale->outputs[0]->h, c->sws_param);
+            scale->filter->init(scale, scale_param, NULL);
+        }
 
-    if (c->has_frame) {
-        av_log(buffer_filter, AV_LOG_ERROR,
-               "Buffering several frames is not supported. "
-               "Please consume all available frames before adding a new one.\n"
-            );
-        //return -1;
+        c->pix_fmt = scale->inputs[0]->format = picref->format;
+        c->w       = scale->inputs[0]->w      = picref->video->w;
+        c->h       = scale->inputs[0]->h      = picref->video->h;
+
+        link = scale->outputs[0];
+        if ((ret =  link->srcpad->config_props(link)) < 0)
+            return ret;
     }
 
-    memcpy(c->frame.data    , frame->data    , sizeof(frame->data));
-    memcpy(c->frame.linesize, frame->linesize, sizeof(frame->linesize));
-    c->frame.interlaced_frame= frame->interlaced_frame;
-    c->frame.top_field_first = frame->top_field_first;
-    c->frame.key_frame = frame->key_frame;
-    c->frame.pict_type = frame->pict_type;
-    c->pts = pts;
-    c->pixel_aspect = pixel_aspect;
-    c->has_frame = 1;
+    c->picref = avfilter_get_video_buffer(outlink, AV_PERM_WRITE,
+                                          picref->video->w, picref->video->h);
+    av_image_copy(c->picref->data, c->picref->linesize,
+                  (void*)picref->data, picref->linesize,
+                  picref->format, picref->video->w, picref->video->h);
+    avfilter_copy_buffer_ref_props(c->picref, picref);
 
     return 0;
 }
 
+#if CONFIG_AVCODEC
+#include "avcodec.h"
+
+int av_vsrc_buffer_add_frame(AVFilterContext *buffer_src,
+                             const AVFrame *frame, int flags)
+{
+    int ret;
+    AVFilterBufferRef *picref =
+        avfilter_get_video_buffer_ref_from_frame(frame, AV_PERM_WRITE);
+    if (!picref)
+        return AVERROR(ENOMEM);
+    ret = av_vsrc_buffer_add_video_buffer_ref(buffer_src, picref, flags);
+    picref->buf->data[0] = NULL;
+    avfilter_unref_buffer(picref);
+
+    return ret;
+}
+#endif
+
 static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
 {
     BufferSourceContext *c = ctx->priv;
     char pix_fmt_str[128];
-    int n = 0;
+    int ret, n = 0;
+    *c->sws_param = 0;
 
     if (!args ||
-        (n = sscanf(args, "%d:%d:%127[^:]:%d:%d:%d:%d", &c->w, &c->h, pix_fmt_str,
+        (n = sscanf(args, "%d:%d:%127[^:]:%d:%d:%d:%d:%255c", &c->w, &c->h, pix_fmt_str,
                     &c->time_base.num, &c->time_base.den,
-                    &c->pixel_aspect.num, &c->pixel_aspect.den)) != 7) {
-        av_log(ctx, AV_LOG_ERROR, "Expected 7 arguments, but %d found in '%s'\n", n, args);
+                    &c->sample_aspect_ratio.num, &c->sample_aspect_ratio.den, c->sws_param)) < 7) {
+        av_log(ctx, AV_LOG_ERROR, "Expected at least 7 arguments, but only %d found in '%s'\n", n, args);
         return AVERROR(EINVAL);
     }
-    if ((c->pix_fmt = av_get_pix_fmt(pix_fmt_str)) == PIX_FMT_NONE) {
-        char *tail;
-        c->pix_fmt = strtol(pix_fmt_str, &tail, 10);
-        if (*tail || c->pix_fmt < 0 || c->pix_fmt >= PIX_FMT_NB) {
-            av_log(ctx, AV_LOG_ERROR, "Invalid pixel format string '%s'\n", pix_fmt_str);
-            return AVERROR(EINVAL);
-        }
-    }
 
-    av_log(ctx, AV_LOG_INFO, "w:%d h:%d pixfmt:%s\n", c->w, c->h, av_pix_fmt_descriptors[c->pix_fmt].name);
+    if ((ret = ff_parse_pixel_format(&c->pix_fmt, pix_fmt_str, ctx)) < 0)
+        return ret;
+
+    av_log(ctx, AV_LOG_INFO, "w:%d h:%d pixfmt:%s tb:%d/%d sar:%d/%d sws_param:%s\n",
+           c->w, c->h, av_pix_fmt_descriptors[c->pix_fmt].name,
+           c->time_base.num, c->time_base.den,
+           c->sample_aspect_ratio.num, c->sample_aspect_ratio.den, c->sws_param);
     return 0;
 }
 
@@ -94,7 +161,7 @@ static int query_formats(AVFilterContext *ctx)
     BufferSourceContext *c = ctx->priv;
     enum PixelFormat pix_fmts[] = { c->pix_fmt, PIX_FMT_NONE };
 
-    avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts));
+    avfilter_set_common_pixel_formats(ctx, avfilter_make_format_list(pix_fmts));
     return 0;
 }
 
@@ -104,7 +171,7 @@ static int config_props(AVFilterLink *link)
 
     link->w = c->w;
     link->h = c->h;
-    link->sample_aspect_ratio = c->pixel_aspect;
+    link->sample_aspect_ratio = c->sample_aspect_ratio;
     link->time_base = c->time_base;
 
     return 0;
@@ -113,36 +180,18 @@ static int config_props(AVFilterLink *link)
 static int request_frame(AVFilterLink *link)
 {
     BufferSourceContext *c = link->src->priv;
-    AVFilterBufferRef *picref;
 
-    if (!c->has_frame) {
-        av_log(link->src, AV_LOG_ERROR,
+    if (!c->picref) {
+        av_log(link->src, AV_LOG_WARNING,
                "request_frame() called with no available frame!\n");
-        //return -1;
+        return AVERROR(EINVAL);
     }
 
-    /* This picture will be needed unmodified later for decoding the next
-     * frame */
-    picref = avfilter_get_video_buffer(link, AV_PERM_WRITE | AV_PERM_PRESERVE |
-                                       AV_PERM_REUSE2,
-                                       link->w, link->h);
-
-    av_image_copy(picref->data, picref->linesize,
-                  c->frame.data, c->frame.linesize,
-                  picref->format, link->w, link->h);
-
-    picref->pts                    = c->pts;
-    picref->video->pixel_aspect    = c->pixel_aspect;
-    picref->video->interlaced      = c->frame.interlaced_frame;
-    picref->video->top_field_first = c->frame.top_field_first;
-    picref->video->key_frame       = c->frame.key_frame;
-    picref->video->pict_type       = c->frame.pict_type;
-    avfilter_start_frame(link, avfilter_ref_buffer(picref, ~0));
+    avfilter_start_frame(link, avfilter_ref_buffer(c->picref, ~0));
     avfilter_draw_slice(link, 0, link->h, 1);
     avfilter_end_frame(link);
-    avfilter_unref_buffer(picref);
-
-    c->has_frame = 0;
+    avfilter_unref_buffer(c->picref);
+    c->picref = NULL;
 
     return 0;
 }
@@ -150,7 +199,7 @@ static int request_frame(AVFilterLink *link)
 static int poll_frame(AVFilterLink *link)
 {
     BufferSourceContext *c = link->src->priv;
-    return !!(c->has_frame);
+    return !!(c->picref);
 }
 
 AVFilter avfilter_vsrc_buffer = {