avfilter/vf_vidstabdetect: use the name 's' for the pointer to the private context
[ffmpeg.git] / libavfilter / avfilter.c
index 8f028e1..7da6cf2 100644 (file)
@@ -2,29 +2,31 @@
  * filter layer
  * Copyright (c) 2007 Bobby Bingham
  *
- * 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
  */
 
-/* #define DEBUG */
-
+#include "libavutil/atomic.h"
+#include "libavutil/avassert.h"
 #include "libavutil/avstring.h"
 #include "libavutil/channel_layout.h"
 #include "libavutil/common.h"
+#include "libavutil/eval.h"
 #include "libavutil/imgutils.h"
+#include "libavutil/internal.h"
 #include "libavutil/opt.h"
 #include "libavutil/pixdesc.h"
 #include "libavutil/rational.h"
 #include "avfilter.h"
 #include "formats.h"
 #include "internal.h"
-#include "video.h"
 
-unsigned avfilter_version(void) {
+#include "libavutil/ffversion.h"
+const char av_filter_ffversion[] = "FFmpeg version " FFMPEG_VERSION;
+
+static int ff_filter_frame_framed(AVFilterLink *link, AVFrame *frame);
+
+void ff_tlog_ref(void *ctx, AVFrame *ref, int end)
+{
+    av_unused char buf[16];
+    ff_tlog(ctx,
+            "ref[%p buf:%p data:%p linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64,
+            ref, ref->buf, ref->data[0],
+            ref->linesize[0], ref->linesize[1], ref->linesize[2], ref->linesize[3],
+            ref->pts, av_frame_get_pkt_pos(ref));
+
+    if (ref->width) {
+        ff_tlog(ctx, " a:%d/%d s:%dx%d i:%c iskey:%d type:%c",
+                ref->sample_aspect_ratio.num, ref->sample_aspect_ratio.den,
+                ref->width, ref->height,
+                !ref->interlaced_frame     ? 'P' :         /* Progressive  */
+                ref->top_field_first ? 'T' : 'B',    /* Top / Bottom */
+                ref->key_frame,
+                av_get_picture_type_char(ref->pict_type));
+    }
+    if (ref->nb_samples) {
+        ff_tlog(ctx, " cl:%"PRId64"d n:%d r:%d",
+                ref->channel_layout,
+                ref->nb_samples,
+                ref->sample_rate);
+    }
+
+    ff_tlog(ctx, "]%s", end ? "\n" : "");
+}
+
+unsigned avfilter_version(void)
+{
+    av_assert0(LIBAVFILTER_VERSION_MICRO >= 100);
     return LIBAVFILTER_VERSION_INT;
 }
 
 const char *avfilter_configuration(void)
 {
-    return LIBAV_CONFIGURATION;
+    return FFMPEG_CONFIGURATION;
 }
 
 const char *avfilter_license(void)
 {
 #define LICENSE_PREFIX "libavfilter license: "
-    return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1;
+    return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
+}
+
+void ff_command_queue_pop(AVFilterContext *filter)
+{
+    AVFilterCommand *c= filter->command_queue;
+    av_freep(&c->arg);
+    av_freep(&c->command);
+    filter->command_queue= c->next;
+    av_free(c);
 }
 
-void ff_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
+int ff_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
                    AVFilterPad **pads, AVFilterLink ***links,
                    AVFilterPad *newpad)
 {
+    AVFilterLink **newlinks;
+    AVFilterPad *newpads;
     unsigned i;
 
     idx = FFMIN(idx, *count);
 
-    *pads  = av_realloc(*pads,  sizeof(AVFilterPad)   * (*count + 1));
-    *links = av_realloc(*links, sizeof(AVFilterLink*) * (*count + 1));
-    memmove(*pads +idx+1, *pads +idx, sizeof(AVFilterPad)   * (*count-idx));
-    memmove(*links+idx+1, *links+idx, sizeof(AVFilterLink*) * (*count-idx));
-    memcpy(*pads+idx, newpad, sizeof(AVFilterPad));
+    newpads  = av_realloc_array(*pads,  *count + 1, sizeof(AVFilterPad));
+    newlinks = av_realloc_array(*links, *count + 1, sizeof(AVFilterLink*));
+    if (newpads)
+        *pads  = newpads;
+    if (newlinks)
+        *links = newlinks;
+    if (!newpads || !newlinks)
+        return AVERROR(ENOMEM);
+
+    memmove(*pads  + idx + 1, *pads  + idx, sizeof(AVFilterPad)   * (*count - idx));
+    memmove(*links + idx + 1, *links + idx, sizeof(AVFilterLink*) * (*count - idx));
+    memcpy(*pads + idx, newpad, sizeof(AVFilterPad));
     (*links)[idx] = NULL;
 
     (*count)++;
-    for (i = idx+1; i < *count; i++)
-        if (*links[i])
-            (*(unsigned *)((uint8_t *) *links[i] + padidx_off))++;
+    for (i = idx + 1; i < *count; i++)
+        if ((*links)[i])
+            (*(unsigned *)((uint8_t *) (*links)[i] + padidx_off))++;
+
+    return 0;
 }
 
 int avfilter_link(AVFilterContext *src, unsigned srcpad,
@@ -79,29 +135,53 @@ int avfilter_link(AVFilterContext *src, unsigned srcpad,
 
     if (src->nb_outputs <= srcpad || dst->nb_inputs <= dstpad ||
         src->outputs[srcpad]      || dst->inputs[dstpad])
-        return -1;
+        return AVERROR(EINVAL);
 
     if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) {
         av_log(src, AV_LOG_ERROR,
-               "Media type mismatch between the '%s' filter output pad %d and the '%s' filter input pad %d\n",
-               src->name, srcpad, dst->name, dstpad);
+               "Media type mismatch between the '%s' filter output pad %d (%s) and the '%s' filter input pad %d (%s)\n",
+               src->name, srcpad, (char *)av_x_if_null(av_get_media_type_string(src->output_pads[srcpad].type), "?"),
+               dst->name, dstpad, (char *)av_x_if_null(av_get_media_type_string(dst-> input_pads[dstpad].type), "?"));
         return AVERROR(EINVAL);
     }
 
-    src->outputs[srcpad] =
-    dst-> inputs[dstpad] = link = av_mallocz(sizeof(AVFilterLink));
+    link = av_mallocz(sizeof(*link));
+    if (!link)
+        return AVERROR(ENOMEM);
+
+    src->outputs[srcpad] = dst->inputs[dstpad] = link;
 
     link->src     = src;
     link->dst     = dst;
     link->srcpad  = &src->output_pads[srcpad];
     link->dstpad  = &dst->input_pads[dstpad];
     link->type    = src->output_pads[srcpad].type;
-    assert(AV_PIX_FMT_NONE == -1 && AV_SAMPLE_FMT_NONE == -1);
+    av_assert0(AV_PIX_FMT_NONE == -1 && AV_SAMPLE_FMT_NONE == -1);
     link->format  = -1;
 
     return 0;
 }
 
+void avfilter_link_free(AVFilterLink **link)
+{
+    if (!*link)
+        return;
+
+    av_frame_free(&(*link)->partial_buf);
+
+    av_freep(link);
+}
+
+int avfilter_link_get_channels(AVFilterLink *link)
+{
+    return link->channels;
+}
+
+void avfilter_link_set_closed(AVFilterLink *link, int closed)
+{
+    link->closed = closed;
+}
+
 int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
                            unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
 {
@@ -120,18 +200,18 @@ int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
     }
 
     /* re-hookup the link to the new destination filter we inserted */
-    link->dst = filt;
-    link->dstpad = &filt->input_pads[filt_srcpad_idx];
+    link->dst                     = filt;
+    link->dstpad                  = &filt->input_pads[filt_srcpad_idx];
     filt->inputs[filt_srcpad_idx] = link;
 
     /* if any information on supported media formats already exists on the
      * link, we need to preserve that */
     if (link->out_formats)
         ff_formats_changeref(&link->out_formats,
-                                   &filt->outputs[filt_dstpad_idx]->out_formats);
+                             &filt->outputs[filt_dstpad_idx]->out_formats);
     if (link->out_samplerates)
         ff_formats_changeref(&link->out_samplerates,
-                                   &filt->outputs[filt_dstpad_idx]->out_samplerates);
+                             &filt->outputs[filt_dstpad_idx]->out_samplerates);
     if (link->out_channel_layouts)
         ff_channel_layouts_changeref(&link->out_channel_layouts,
                                      &filt->outputs[filt_dstpad_idx]->out_channel_layouts);
@@ -147,8 +227,17 @@ int avfilter_config_links(AVFilterContext *filter)
 
     for (i = 0; i < filter->nb_inputs; i ++) {
         AVFilterLink *link = filter->inputs[i];
+        AVFilterLink *inlink;
 
         if (!link) continue;
+        if (!link->src || !link->dst) {
+            av_log(filter, AV_LOG_ERROR,
+                   "Not all input and output are properly linked (%d).\n", i);
+            return AVERROR(EINVAL);
+        }
+
+        inlink = link->src->nb_inputs ? link->src->inputs[0] : NULL;
+        link->current_pts = AV_NOPTS_VALUE;
 
         switch (link->init_state) {
         case AVLINK_INIT:
@@ -177,31 +266,44 @@ int avfilter_config_links(AVFilterContext *filter)
                 return ret;
             }
 
-            if (link->time_base.num == 0 && link->time_base.den == 0)
-                link->time_base = link->src && link->src->nb_inputs ?
-                    link->src->inputs[0]->time_base : AV_TIME_BASE_Q;
+            switch (link->type) {
+            case AVMEDIA_TYPE_VIDEO:
+                if (!link->time_base.num && !link->time_base.den)
+                    link->time_base = inlink ? inlink->time_base : AV_TIME_BASE_Q;
 
-            if (link->type == AVMEDIA_TYPE_VIDEO) {
                 if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den)
-                    link->sample_aspect_ratio = link->src->nb_inputs ?
-                        link->src->inputs[0]->sample_aspect_ratio : (AVRational){1,1};
+                    link->sample_aspect_ratio = inlink ?
+                        inlink->sample_aspect_ratio : (AVRational){1,1};
+
+                if (inlink && !link->frame_rate.num && !link->frame_rate.den)
+                    link->frame_rate = inlink->frame_rate;
 
-                if (link->src->nb_inputs) {
+                if (inlink) {
                     if (!link->w)
-                        link->w = link->src->inputs[0]->w;
+                        link->w = inlink->w;
                     if (!link->h)
-                        link->h = link->src->inputs[0]->h;
+                        link->h = inlink->h;
                 } else if (!link->w || !link->h) {
                     av_log(link->src, AV_LOG_ERROR,
                            "Video source filters must set their output link's "
                            "width and height\n");
                     return AVERROR(EINVAL);
                 }
+                break;
+
+            case AVMEDIA_TYPE_AUDIO:
+                if (inlink) {
+                    if (!link->time_base.num && !link->time_base.den)
+                        link->time_base = inlink->time_base;
+                }
+
+                if (!link->time_base.num && !link->time_base.den)
+                    link->time_base = (AVRational) {1, link->sample_rate};
             }
 
             if ((config_link = link->dstpad->config_props))
                 if ((ret = config_link(link)) < 0) {
-                    av_log(link->src, AV_LOG_ERROR,
+                    av_log(link->dst, AV_LOG_ERROR,
                            "Failed to configure input pad on %s\n",
                            link->dst->name);
                     return ret;
@@ -214,11 +316,11 @@ int avfilter_config_links(AVFilterContext *filter)
     return 0;
 }
 
-void ff_dlog_link(void *ctx, AVFilterLink *link, int end)
+void ff_tlog_link(void *ctx, AVFilterLink *link, int end)
 {
     if (link->type == AVMEDIA_TYPE_VIDEO) {
-        av_dlog(ctx,
-                "link[%p s:%dx%d fmt:%-16s %-16s->%-16s]%s",
+        ff_tlog(ctx,
+                "link[%p s:%dx%d fmt:%s %s->%s]%s",
                 link, link->w, link->h,
                 av_get_pix_fmt_name(link->format),
                 link->src ? link->src->filter->name : "",
@@ -228,9 +330,9 @@ void ff_dlog_link(void *ctx, AVFilterLink *link, int end)
         char buf[128];
         av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
 
-        av_dlog(ctx,
-                "link[%p r:%d cl:%s fmt:%-16s %-16s->%-16s]%s",
-                link, link->sample_rate, buf,
+        ff_tlog(ctx,
+                "link[%p r:%d cl:%s fmt:%s %s->%s]%s",
+                link, (int)link->sample_rate, buf,
                 av_get_sample_fmt_name(link->format),
                 link->src ? link->src->filter->name : "",
                 link->dst ? link->dst->filter->name : "",
@@ -240,13 +342,33 @@ void ff_dlog_link(void *ctx, AVFilterLink *link, int end)
 
 int ff_request_frame(AVFilterLink *link)
 {
-    FF_DPRINTF_START(NULL, request_frame); ff_dlog_link(NULL, link, 1);
-
-    if (link->srcpad->request_frame)
-        return link->srcpad->request_frame(link);
-    else if (link->src->inputs[0])
-        return ff_request_frame(link->src->inputs[0]);
-    else return -1;
+    int ret = -1;
+    FF_TPRINTF_START(NULL, request_frame); ff_tlog_link(NULL, link, 1);
+
+    if (link->closed)
+        return AVERROR_EOF;
+    av_assert0(!link->frame_requested);
+    link->frame_requested = 1;
+    while (link->frame_requested) {
+        if (link->srcpad->request_frame)
+            ret = link->srcpad->request_frame(link);
+        else if (link->src->inputs[0])
+            ret = ff_request_frame(link->src->inputs[0]);
+        if (ret == AVERROR_EOF && link->partial_buf) {
+            AVFrame *pbuf = link->partial_buf;
+            link->partial_buf = NULL;
+            ret = ff_filter_frame_framed(link, pbuf);
+        }
+        if (ret < 0) {
+            link->frame_requested = 0;
+            if (ret == AVERROR_EOF)
+                link->closed = 1;
+        } else {
+            av_assert0(!link->frame_requested ||
+                       link->flags & FF_LINK_FLAG_REQUEST_LOOP);
+        }
+    }
+    return ret;
 }
 
 int ff_poll_frame(AVFilterLink *link)
@@ -259,7 +381,7 @@ int ff_poll_frame(AVFilterLink *link)
     for (i = 0; i < link->src->nb_inputs; i++) {
         int val;
         if (!link->src->inputs[i])
-            return -1;
+            return AVERROR(EINVAL);
         val = ff_poll_frame(link->src->inputs[i]);
         min = FFMIN(min, val);
     }
@@ -267,29 +389,128 @@ int ff_poll_frame(AVFilterLink *link)
     return min;
 }
 
+static const char *const var_names[] = {
+    "t",
+    "n",
+    "pos",
+    "w",
+    "h",
+    NULL
+};
+
+enum {
+    VAR_T,
+    VAR_N,
+    VAR_POS,
+    VAR_W,
+    VAR_H,
+    VAR_VARS_NB
+};
+
+static int set_enable_expr(AVFilterContext *ctx, const char *expr)
+{
+    int ret;
+    char *expr_dup;
+    AVExpr *old = ctx->enable;
+
+    if (!(ctx->filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE)) {
+        av_log(ctx, AV_LOG_ERROR, "Timeline ('enable' option) not supported "
+               "with filter '%s'\n", ctx->filter->name);
+        return AVERROR_PATCHWELCOME;
+    }
+
+    expr_dup = av_strdup(expr);
+    if (!expr_dup)
+        return AVERROR(ENOMEM);
+
+    if (!ctx->var_values) {
+        ctx->var_values = av_calloc(VAR_VARS_NB, sizeof(*ctx->var_values));
+        if (!ctx->var_values) {
+            av_free(expr_dup);
+            return AVERROR(ENOMEM);
+        }
+    }
+
+    ret = av_expr_parse((AVExpr**)&ctx->enable, expr_dup, var_names,
+                        NULL, NULL, NULL, NULL, 0, ctx->priv);
+    if (ret < 0) {
+        av_log(ctx->priv, AV_LOG_ERROR,
+               "Error when evaluating the expression '%s' for enable\n",
+               expr_dup);
+        av_free(expr_dup);
+        return ret;
+    }
+
+    av_expr_free(old);
+    av_free(ctx->enable_str);
+    ctx->enable_str = expr_dup;
+    return 0;
+}
+
+void ff_update_link_current_pts(AVFilterLink *link, int64_t pts)
+{
+    if (pts == AV_NOPTS_VALUE)
+        return;
+    link->current_pts = av_rescale_q(pts, link->time_base, AV_TIME_BASE_Q);
+    /* TODO use duration */
+    if (link->graph && link->age_index >= 0)
+        ff_avfilter_graph_update_heap(link->graph, link);
+}
+
+int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
+{
+    if(!strcmp(cmd, "ping")){
+        char local_res[256] = {0};
+
+        if (!res) {
+            res = local_res;
+            res_len = sizeof(local_res);
+        }
+        av_strlcatf(res, res_len, "pong from:%s %s\n", filter->filter->name, filter->name);
+        if (res == local_res)
+            av_log(filter, AV_LOG_INFO, "%s", res);
+        return 0;
+    }else if(!strcmp(cmd, "enable")) {
+        return set_enable_expr(filter, arg);
+    }else if(filter->filter->process_command) {
+        return filter->filter->process_command(filter, cmd, arg, res, res_len, flags);
+    }
+    return AVERROR(ENOSYS);
+}
+
 static AVFilter *first_filter;
+static AVFilter **last_filter = &first_filter;
 
+#if !FF_API_NOCONST_GET_NAME
+const
+#endif
 AVFilter *avfilter_get_by_name(const char *name)
 {
-    AVFilter *f = NULL;
+    const AVFilter *f = NULL;
 
     if (!name)
         return NULL;
 
     while ((f = avfilter_next(f)))
         if (!strcmp(f->name, name))
-            return f;
+            return (AVFilter *)f;
 
     return NULL;
 }
 
 int avfilter_register(AVFilter *filter)
 {
-    AVFilter **f = &first_filter;
-    while (*f)
-        f = &(*f)->next;
-    *f = filter;
+    AVFilter **f = last_filter;
+
+    /* the filter must select generic or internal exclusively */
+    av_assert0((filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE) != AVFILTER_FLAG_SUPPORT_TIMELINE);
+
     filter->next = NULL;
+
+    while(*f || avpriv_atomic_ptr_cas((void * volatile *)f, NULL, filter))
+        f = &(*f)->next;
+    last_filter = &filter->next;
+
     return 0;
 }
 
@@ -316,14 +537,15 @@ int avfilter_pad_count(const AVFilterPad *pads)
     if (!pads)
         return 0;
 
-    for(count = 0; pads->name; count ++) pads ++;
+    for (count = 0; pads->name; count++)
+        pads++;
     return count;
 }
 
-static const char *filter_name(void *p)
+static const char *default_filter_name(void *filter_ctx)
 {
-    AVFilterContext *filter = p;
-    return filter->filter->name;
+    AVFilterContext *ctx = filter_ctx;
+    return ctx->name ? ctx->name : ctx->filter->name;
 }
 
 static void *filter_child_next(void *obj, void *prev)
@@ -336,12 +558,18 @@ static void *filter_child_next(void *obj, void *prev)
 
 static const AVClass *filter_child_class_next(const AVClass *prev)
 {
-    AVFilter *f = NULL;
+    const AVFilter *f = NULL;
 
+    /* find the filter that corresponds to prev */
     while (prev && (f = avfilter_next(f)))
         if (f->priv_class == prev)
             break;
 
+    /* could not find filter corresponding to prev */
+    if (prev && !f)
+        return NULL;
+
+    /* find next filter with specific options */
     while ((f = avfilter_next(f)))
         if (f->priv_class)
             return f->priv_class;
@@ -349,14 +577,39 @@ static const AVClass *filter_child_class_next(const AVClass *prev)
     return NULL;
 }
 
+#define OFFSET(x) offsetof(AVFilterContext, x)
+#define FLAGS AV_OPT_FLAG_FILTERING_PARAM
+static const AVOption avfilter_options[] = {
+    { "thread_type", "Allowed thread types", OFFSET(thread_type), AV_OPT_TYPE_FLAGS,
+        { .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, FLAGS, "thread_type" },
+        { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .unit = "thread_type" },
+    { "enable", "set enable expression", OFFSET(enable_str), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
+    { NULL },
+};
+
 static const AVClass avfilter_class = {
     .class_name = "AVFilter",
-    .item_name  = filter_name,
+    .item_name  = default_filter_name,
     .version    = LIBAVUTIL_VERSION_INT,
+    .category   = AV_CLASS_CATEGORY_FILTER,
     .child_next = filter_child_next,
     .child_class_next = filter_child_class_next,
+    .option           = avfilter_options,
 };
 
+static int default_execute(AVFilterContext *ctx, avfilter_action_func *func, void *arg,
+                           int *ret, int nb_jobs)
+{
+    int i;
+
+    for (i = 0; i < nb_jobs; i++) {
+        int r = func(ctx, arg, i, nb_jobs);
+        if (ret)
+            ret[i] = r;
+    }
+    return 0;
+}
+
 AVFilterContext *ff_filter_alloc(const AVFilter *filter, const char *inst_name)
 {
     AVFilterContext *ret;
@@ -377,36 +630,38 @@ AVFilterContext *ff_filter_alloc(const AVFilter *filter, const char *inst_name)
             goto err;
     }
 
+    av_opt_set_defaults(ret);
     if (filter->priv_class) {
         *(const AVClass**)ret->priv = filter->priv_class;
         av_opt_set_defaults(ret->priv);
     }
 
+    ret->internal = av_mallocz(sizeof(*ret->internal));
+    if (!ret->internal)
+        goto err;
+    ret->internal->execute = default_execute;
+
     ret->nb_inputs = avfilter_pad_count(filter->inputs);
     if (ret->nb_inputs ) {
-        ret->input_pads   = av_malloc(sizeof(AVFilterPad) * ret->nb_inputs);
+        ret->input_pads   = av_malloc_array(ret->nb_inputs, sizeof(AVFilterPad));
         if (!ret->input_pads)
             goto err;
         memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->nb_inputs);
-        ret->inputs       = av_mallocz(sizeof(AVFilterLink*) * ret->nb_inputs);
+        ret->inputs       = av_mallocz_array(ret->nb_inputs, sizeof(AVFilterLink*));
         if (!ret->inputs)
             goto err;
     }
 
     ret->nb_outputs = avfilter_pad_count(filter->outputs);
     if (ret->nb_outputs) {
-        ret->output_pads  = av_malloc(sizeof(AVFilterPad) * ret->nb_outputs);
+        ret->output_pads  = av_malloc_array(ret->nb_outputs, sizeof(AVFilterPad));
         if (!ret->output_pads)
             goto err;
         memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->nb_outputs);
-        ret->outputs      = av_mallocz(sizeof(AVFilterLink*) * ret->nb_outputs);
+        ret->outputs      = av_mallocz_array(ret->nb_outputs, sizeof(AVFilterLink*));
         if (!ret->outputs)
             goto err;
     }
-#if FF_API_FOO_COUNT
-    ret->output_count = ret->nb_outputs;
-    ret->input_count  = ret->nb_inputs;
-#endif
 
     return ret;
 
@@ -418,6 +673,7 @@ err:
     av_freep(&ret->output_pads);
     ret->nb_outputs = 0;
     av_freep(&ret->priv);
+    av_freep(&ret->internal);
     av_free(ret);
     return NULL;
 }
@@ -430,10 +686,31 @@ int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *in
 }
 #endif
 
+static void free_link(AVFilterLink *link)
+{
+    if (!link)
+        return;
+
+    if (link->src)
+        link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
+    if (link->dst)
+        link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
+
+    ff_formats_unref(&link->in_formats);
+    ff_formats_unref(&link->out_formats);
+    ff_formats_unref(&link->in_samplerates);
+    ff_formats_unref(&link->out_samplerates);
+    ff_channel_layouts_unref(&link->in_channel_layouts);
+    ff_channel_layouts_unref(&link->out_channel_layouts);
+    avfilter_link_free(&link);
+}
+
 void avfilter_free(AVFilterContext *filter)
 {
     int i;
-    AVFilterLink *link;
+
+    if (!filter)
+        return;
 
     if (filter->graph)
         ff_filter_graph_remove_filter(filter->graph, filter);
@@ -442,30 +719,10 @@ void avfilter_free(AVFilterContext *filter)
         filter->filter->uninit(filter);
 
     for (i = 0; i < filter->nb_inputs; i++) {
-        if ((link = filter->inputs[i])) {
-            if (link->src)
-                link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
-            ff_formats_unref(&link->in_formats);
-            ff_formats_unref(&link->out_formats);
-            ff_formats_unref(&link->in_samplerates);
-            ff_formats_unref(&link->out_samplerates);
-            ff_channel_layouts_unref(&link->in_channel_layouts);
-            ff_channel_layouts_unref(&link->out_channel_layouts);
-        }
-        av_freep(&link);
+        free_link(filter->inputs[i]);
     }
     for (i = 0; i < filter->nb_outputs; i++) {
-        if ((link = filter->outputs[i])) {
-            if (link->dst)
-                link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
-            ff_formats_unref(&link->in_formats);
-            ff_formats_unref(&link->out_formats);
-            ff_formats_unref(&link->in_samplerates);
-            ff_formats_unref(&link->out_samplerates);
-            ff_channel_layouts_unref(&link->in_channel_layouts);
-            ff_channel_layouts_unref(&link->out_channel_layouts);
-        }
-        av_freep(&link);
+        free_link(filter->outputs[i]);
     }
 
     if (filter->filter->priv_class)
@@ -477,40 +734,93 @@ void avfilter_free(AVFilterContext *filter)
     av_freep(&filter->inputs);
     av_freep(&filter->outputs);
     av_freep(&filter->priv);
+    while(filter->command_queue){
+        ff_command_queue_pop(filter);
+    }
+    av_opt_free(filter);
+    av_expr_free(filter->enable);
+    filter->enable = NULL;
+    av_freep(&filter->var_values);
+    av_freep(&filter->internal);
     av_free(filter);
 }
 
-/* process a list of value1:value2:..., each value corresponding
- * to subsequent AVOption, in the order they are declared */
-static int process_unnamed_options(AVFilterContext *ctx, AVDictionary **options,
-                                   const char *args)
+static int process_options(AVFilterContext *ctx, AVDictionary **options,
+                           const char *args)
 {
     const AVOption *o = NULL;
-    const char *p = args;
-    char *val;
+    int ret, count = 0;
+    char *av_uninit(parsed_key), *av_uninit(value);
+    const char *key;
+    int offset= -1;
+
+    if (!args)
+        return 0;
+
+    while (*args) {
+        const char *shorthand = NULL;
 
-    while (*p) {
         o = av_opt_next(ctx->priv, o);
-        if (!o) {
-            av_log(ctx, AV_LOG_ERROR, "More options provided than "
-                   "this filter supports.\n");
-            return AVERROR(EINVAL);
+        if (o) {
+            if (o->type == AV_OPT_TYPE_CONST || o->offset == offset)
+                continue;
+            offset = o->offset;
+            shorthand = o->name;
         }
-        if (o->type == AV_OPT_TYPE_CONST)
-            continue;
 
-        val = av_get_token(&p, ":");
-        if (!val)
-            return AVERROR(ENOMEM);
+        ret = av_opt_get_key_value(&args, "=", ":",
+                                   shorthand ? AV_OPT_FLAG_IMPLICIT_KEY : 0,
+                                   &parsed_key, &value);
+        if (ret < 0) {
+            if (ret == AVERROR(EINVAL))
+                av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", args);
+            else
+                av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", args,
+                       av_err2str(ret));
+            return ret;
+        }
+        if (*args)
+            args++;
+        if (parsed_key) {
+            key = parsed_key;
+            while ((o = av_opt_next(ctx->priv, o))); /* discard all remaining shorthand */
+        } else {
+            key = shorthand;
+        }
 
-        av_dict_set(options, o->name, val, 0);
+        av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);
 
-        av_freep(&val);
-        if (*p)
-            p++;
+        if (av_opt_find(ctx, key, NULL, 0, 0)) {
+            ret = av_opt_set(ctx, key, value, 0);
+            if (ret < 0) {
+                av_free(value);
+                av_free(parsed_key);
+                return ret;
+            }
+        } else {
+        av_dict_set(options, key, value, 0);
+        if ((ret = av_opt_set(ctx->priv, key, value, 0)) < 0) {
+            if (!av_opt_find(ctx->priv, key, NULL, 0, AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ)) {
+            if (ret == AVERROR_OPTION_NOT_FOUND)
+                av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key);
+            av_free(value);
+            av_free(parsed_key);
+            return ret;
+            }
+        }
+        }
+
+        av_free(value);
+        av_free(parsed_key);
+        count++;
     }
 
-    return 0;
+    if (ctx->enable_str) {
+        ret = set_enable_expr(ctx, ctx->enable_str);
+        if (ret < 0)
+            return ret;
+    }
+    return count;
 }
 
 #if FF_API_AVFILTER_INIT_FILTER
@@ -524,6 +834,21 @@ int avfilter_init_dict(AVFilterContext *ctx, AVDictionary **options)
 {
     int ret = 0;
 
+    ret = av_opt_set_dict(ctx, options);
+    if (ret < 0) {
+        av_log(ctx, AV_LOG_ERROR, "Error applying generic filter options.\n");
+        return ret;
+    }
+
+    if (ctx->filter->flags & AVFILTER_FLAG_SLICE_THREADS &&
+        ctx->thread_type & ctx->graph->thread_type & AVFILTER_THREAD_SLICE &&
+        ctx->graph->internal->thread_execute) {
+        ctx->thread_type       = AVFILTER_THREAD_SLICE;
+        ctx->internal->execute = ctx->graph->internal->thread_execute;
+    } else {
+        ctx->thread_type = 0;
+    }
+
     if (ctx->filter->priv_class) {
         ret = av_opt_set_dict(ctx->priv, options);
         if (ret < 0) {
@@ -532,7 +857,9 @@ int avfilter_init_dict(AVFilterContext *ctx, AVDictionary **options)
         }
     }
 
-    if (ctx->filter->init)
+    if (ctx->filter->init_opaque)
+        ret = ctx->filter->init_opaque(ctx, NULL);
+    else if (ctx->filter->init)
         ret = ctx->filter->init(ctx);
     else if (ctx->filter->init_dict)
         ret = ctx->filter->init_dict(ctx, options);
@@ -544,7 +871,7 @@ int avfilter_init_str(AVFilterContext *filter, const char *args)
 {
     AVDictionary *options = NULL;
     AVDictionaryEntry *e;
-    int ret=0;
+    int ret = 0;
 
     if (args && *args) {
         if (!filter->filter->priv_class) {
@@ -553,52 +880,21 @@ int avfilter_init_str(AVFilterContext *filter, const char *args)
             return AVERROR(EINVAL);
         }
 
-#if FF_API_OLD_FILTER_OPTS
-        if (!strcmp(filter->filter->name, "scale") &&
-            strchr(args, ':') < strchr(args, '=')) {
-            /* old w:h:flags=<flags> syntax */
-            char *copy = av_strdup(args);
-            char *p;
-
-            av_log(filter, AV_LOG_WARNING, "The <w>:<h>:flags=<flags> option "
-                   "syntax is deprecated. Use either <w>:<h>:<flags> or "
-                   "w=<w>:h=<h>:flags=<flags>.\n");
-
-            if (!copy) {
-                ret = AVERROR(ENOMEM);
-                goto fail;
-            }
-
-            p = strrchr(copy, ':');
-            if (p) {
-                *p++ = 0;
-                ret = av_dict_parse_string(&options, p, "=", ":", 0);
-            }
-            if (ret >= 0)
-                ret = process_unnamed_options(filter, &options, copy);
-            av_freep(&copy);
-
-            if (ret < 0)
-                goto fail;
-        } else
-#endif
-
-        if (strchr(args, '=')) {
-            /* assume a list of key1=value1:key2=value2:... */
-            ret = av_dict_parse_string(&options, args, "=", ":", 0);
-            if (ret < 0)
-                goto fail;
-#if FF_API_OLD_FILTER_OPTS
-        } else if (!strcmp(filter->filter->name, "format")     ||
+#if FF_API_OLD_FILTER_OPTS || FF_API_OLD_FILTER_OPTS_ERROR
+            if (   !strcmp(filter->filter->name, "format")     ||
                    !strcmp(filter->filter->name, "noformat")   ||
                    !strcmp(filter->filter->name, "frei0r")     ||
                    !strcmp(filter->filter->name, "frei0r_src") ||
-                   !strcmp(filter->filter->name, "ocv")) {
+                   !strcmp(filter->filter->name, "ocv")        ||
+                   !strcmp(filter->filter->name, "pan")        ||
+                   !strcmp(filter->filter->name, "pp")         ||
+                   !strcmp(filter->filter->name, "aevalsrc")) {
             /* a hack for compatibility with the old syntax
              * replace colons with |s */
             char *copy = av_strdup(args);
             char *p    = copy;
             int nb_leading = 0; // number of leading colons to skip
+            int deprecated = 0;
 
             if (!copy) {
                 ret = AVERROR(ENOMEM);
@@ -620,22 +916,55 @@ int avfilter_init_str(AVFilterContext *filter, const char *args)
                 p++;
             }
 
-            if (strchr(p, ':')) {
-                av_log(filter, AV_LOG_WARNING, "This syntax is deprecated. Use "
-                       "'|' to separate the list items.\n");
-            }
-
+            deprecated = strchr(p, ':') != NULL;
+
+            if (!strcmp(filter->filter->name, "aevalsrc")) {
+                deprecated = 0;
+                while ((p = strchr(p, ':')) && p[1] != ':') {
+                    const char *epos = strchr(p + 1, '=');
+                    const char *spos = strchr(p + 1, ':');
+                    const int next_token_is_opt = epos && (!spos || epos < spos);
+                    if (next_token_is_opt) {
+                        p++;
+                        break;
+                    }
+                    /* next token does not contain a '=', assume a channel expression */
+                    deprecated = 1;
+                    *p++ = '|';
+                }
+                if (p && *p == ':') { // double sep '::' found
+                    deprecated = 1;
+                    memmove(p, p + 1, strlen(p));
+                }
+            } else
             while ((p = strchr(p, ':')))
                 *p++ = '|';
 
-            ret = process_unnamed_options(filter, &options, copy);
+#if FF_API_OLD_FILTER_OPTS
+            if (deprecated)
+                av_log(filter, AV_LOG_WARNING, "This syntax is deprecated. Use "
+                       "'|' to separate the list items.\n");
+
+            av_log(filter, AV_LOG_DEBUG, "compat: called with args=[%s]\n", copy);
+            ret = process_options(filter, &options, copy);
+#else
+            if (deprecated) {
+                av_log(filter, AV_LOG_ERROR, "This syntax is deprecated. Use "
+                       "'|' to separate the list items ('%s' instead of '%s')\n",
+                       copy, args);
+                ret = AVERROR(EINVAL);
+            } else {
+                ret = process_options(filter, &options, copy);
+            }
+#endif
             av_freep(&copy);
 
             if (ret < 0)
                 goto fail;
+        } else
 #endif
-        } else {
-            ret = process_unnamed_options(filter, &options, args);
+        {
+            ret = process_options(filter, &options, args);
             if (ret < 0)
                 goto fail;
         }
@@ -672,14 +1001,20 @@ static int default_filter_frame(AVFilterLink *link, AVFrame *frame)
     return ff_filter_frame(link->dst->outputs[0], frame);
 }
 
-int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
+static int ff_filter_frame_framed(AVFilterLink *link, AVFrame *frame)
 {
     int (*filter_frame)(AVFilterLink *, AVFrame *);
+    AVFilterContext *dstctx = link->dst;
     AVFilterPad *dst = link->dstpad;
-    AVFrame *out;
+    AVFrame *out = NULL;
+    int ret;
+    AVFilterCommand *cmd= link->dst->command_queue;
+    int64_t pts;
 
-    FF_DPRINTF_START(NULL, filter_frame);
-    ff_dlog_link(NULL, link, 1);
+    if (link->closed) {
+        av_frame_free(&frame);
+        return AVERROR_EOF;
+    }
 
     if (!(filter_frame = dst->filter_frame))
         filter_frame = default_filter_frame;
@@ -695,17 +1030,22 @@ int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
         case AVMEDIA_TYPE_AUDIO:
             out = ff_get_audio_buffer(link, frame->nb_samples);
             break;
-        default: return AVERROR(EINVAL);
+        default:
+            ret = AVERROR(EINVAL);
+            goto fail;
         }
         if (!out) {
-            av_frame_free(&frame);
-            return AVERROR(ENOMEM);
+            ret = AVERROR(ENOMEM);
+            goto fail;
         }
-        av_frame_copy_props(out, frame);
+
+        ret = av_frame_copy_props(out, frame);
+        if (ret < 0)
+            goto fail;
 
         switch (link->type) {
         case AVMEDIA_TYPE_VIDEO:
-            av_image_copy(out->data, out->linesize, frame->data, frame->linesize,
+            av_image_copy(out->data, out->linesize, (const uint8_t **)frame->data, frame->linesize,
                           frame->format, frame->width, frame->height);
             break;
         case AVMEDIA_TYPE_AUDIO:
@@ -714,14 +1054,124 @@ int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
                             av_get_channel_layout_nb_channels(frame->channel_layout),
                             frame->format);
             break;
-        default: return AVERROR(EINVAL);
+        default:
+            ret = AVERROR(EINVAL);
+            goto fail;
         }
 
         av_frame_free(&frame);
     } else
         out = frame;
 
-    return filter_frame(link, out);
+    while(cmd && cmd->time <= out->pts * av_q2d(link->time_base)){
+        av_log(link->dst, AV_LOG_DEBUG,
+               "Processing command time:%f command:%s arg:%s\n",
+               cmd->time, cmd->command, cmd->arg);
+        avfilter_process_command(link->dst, cmd->command, cmd->arg, 0, 0, cmd->flags);
+        ff_command_queue_pop(link->dst);
+        cmd= link->dst->command_queue;
+    }
+
+    pts = out->pts;
+    if (dstctx->enable_str) {
+        int64_t pos = av_frame_get_pkt_pos(out);
+        dstctx->var_values[VAR_N] = link->frame_count;
+        dstctx->var_values[VAR_T] = pts == AV_NOPTS_VALUE ? NAN : pts * av_q2d(link->time_base);
+        dstctx->var_values[VAR_W] = link->w;
+        dstctx->var_values[VAR_H] = link->h;
+        dstctx->var_values[VAR_POS] = pos == -1 ? NAN : pos;
+
+        dstctx->is_disabled = fabs(av_expr_eval(dstctx->enable, dstctx->var_values, NULL)) < 0.5;
+        if (dstctx->is_disabled &&
+            (dstctx->filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC))
+            filter_frame = default_filter_frame;
+    }
+    ret = filter_frame(link, out);
+    link->frame_count++;
+    link->frame_requested = 0;
+    ff_update_link_current_pts(link, pts);
+    return ret;
+
+fail:
+    av_frame_free(&out);
+    av_frame_free(&frame);
+    return ret;
+}
+
+static int ff_filter_frame_needs_framing(AVFilterLink *link, AVFrame *frame)
+{
+    int insamples = frame->nb_samples, inpos = 0, nb_samples;
+    AVFrame *pbuf = link->partial_buf;
+    int nb_channels = av_frame_get_channels(frame);
+    int ret = 0;
+
+    link->flags |= FF_LINK_FLAG_REQUEST_LOOP;
+    /* Handle framing (min_samples, max_samples) */
+    while (insamples) {
+        if (!pbuf) {
+            AVRational samples_tb = { 1, link->sample_rate };
+            pbuf = ff_get_audio_buffer(link, link->partial_buf_size);
+            if (!pbuf) {
+                av_log(link->dst, AV_LOG_WARNING,
+                       "Samples dropped due to memory allocation failure.\n");
+                return 0;
+            }
+            av_frame_copy_props(pbuf, frame);
+            pbuf->pts = frame->pts;
+            if (pbuf->pts != AV_NOPTS_VALUE)
+                pbuf->pts += av_rescale_q(inpos, samples_tb, link->time_base);
+            pbuf->nb_samples = 0;
+        }
+        nb_samples = FFMIN(insamples,
+                           link->partial_buf_size - pbuf->nb_samples);
+        av_samples_copy(pbuf->extended_data, frame->extended_data,
+                        pbuf->nb_samples, inpos,
+                        nb_samples, nb_channels, link->format);
+        inpos                   += nb_samples;
+        insamples               -= nb_samples;
+        pbuf->nb_samples += nb_samples;
+        if (pbuf->nb_samples >= link->min_samples) {
+            ret = ff_filter_frame_framed(link, pbuf);
+            pbuf = NULL;
+        }
+    }
+    av_frame_free(&frame);
+    link->partial_buf = pbuf;
+    return ret;
+}
+
+int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
+{
+    FF_TPRINTF_START(NULL, filter_frame); ff_tlog_link(NULL, link, 1); ff_tlog(NULL, " "); ff_tlog_ref(NULL, frame, 1);
+
+    /* Consistency checks */
+    if (link->type == AVMEDIA_TYPE_VIDEO) {
+        if (strcmp(link->dst->filter->name, "buffersink") &&
+            strcmp(link->dst->filter->name, "format") &&
+            strcmp(link->dst->filter->name, "idet") &&
+            strcmp(link->dst->filter->name, "null") &&
+            strcmp(link->dst->filter->name, "scale")) {
+            av_assert1(frame->format                 == link->format);
+            av_assert1(frame->width               == link->w);
+            av_assert1(frame->height               == link->h);
+        }
+    } else {
+        av_assert1(frame->format                == link->format);
+        av_assert1(av_frame_get_channels(frame) == link->channels);
+        av_assert1(frame->channel_layout        == link->channel_layout);
+        av_assert1(frame->sample_rate           == link->sample_rate);
+    }
+
+    /* Go directly to actual filtering if possible */
+    if (link->type == AVMEDIA_TYPE_AUDIO &&
+        link->min_samples &&
+        (link->partial_buf ||
+         frame->nb_samples < link->min_samples ||
+         frame->nb_samples > link->max_samples)) {
+        return ff_filter_frame_needs_framing(link, frame);
+    } else {
+        return ff_filter_frame_framed(link, frame);
+    }
 }
 
 const AVClass *avfilter_get_class(void)