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avfilter.c
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/*
* filter layer
* Copyright (c) 2007 Bobby Bingham
*
* 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 "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/bprint.h"
#include "libavutil/buffer.h"
#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/eval.h"
#include "libavutil/frame.h"
#include "libavutil/hwcontext.h"
#include "libavutil/internal.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/rational.h"
#include "libavutil/samplefmt.h"
#include "audio.h"
#include "avfilter.h"
#include "avfilter_internal.h"
#include "filters.h"
#include "formats.h"
#include "framequeue.h"
#include "framepool.h"
#include "internal.h"
#include "video.h"
static void tlog_ref(void *ctx, AVFrame *ref, int end)
{
#ifdef TRACE
ff_tlog(ctx,
"ref[%p buf:%p data:%p linesize[%d, %d, %d, %d] pts:%"PRId64,
ref, ref->buf, ref->data[0],
ref->linesize[0], ref->linesize[1], ref->linesize[2], ref->linesize[3],
ref->pts);
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->flags & AV_FRAME_FLAG_INTERLACED) ? 'P' : /* Progressive */
(ref->flags & AV_FRAME_FLAG_TOP_FIELD_FIRST) ? 'T' : 'B', /* Top / Bottom */
!!(ref->flags & AV_FRAME_FLAG_KEY),
av_get_picture_type_char(ref->pict_type));
}
if (ref->nb_samples) {
AVBPrint bprint;
av_bprint_init(&bprint, 1, AV_BPRINT_SIZE_UNLIMITED);
av_channel_layout_describe_bprint(&ref->ch_layout, &bprint);
ff_tlog(ctx, " cl:%s n:%d r:%d",
bprint.str,
ref->nb_samples,
ref->sample_rate);
av_bprint_finalize(&bprint, NULL);
}
ff_tlog(ctx, "]%s", end ? "\n" : "");
#endif
}
static void 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);
}
/**
* Append a new pad.
*
* @param count Pointer to the number of pads in the list
* @param pads Pointer to the pointer to the beginning of the list of pads
* @param links Pointer to the pointer to the beginning of the list of links
* @param newpad The new pad to add. A copy is made when adding.
* @return >= 0 in case of success, a negative AVERROR code on error
*/
static int append_pad(unsigned *count, AVFilterPad **pads,
AVFilterLink ***links, AVFilterPad *newpad)
{
AVFilterLink **newlinks;
AVFilterPad *newpads;
unsigned idx = *count;
newpads = av_realloc_array(*pads, idx + 1, sizeof(*newpads));
newlinks = av_realloc_array(*links, idx + 1, sizeof(*newlinks));
if (newpads)
*pads = newpads;
if (newlinks)
*links = newlinks;
if (!newpads || !newlinks) {
if (newpad->flags & AVFILTERPAD_FLAG_FREE_NAME)
av_freep(&newpad->name);
return AVERROR(ENOMEM);
}
memcpy(*pads + idx, newpad, sizeof(AVFilterPad));
(*links)[idx] = NULL;
(*count)++;
return 0;
}
int ff_append_inpad(AVFilterContext *f, AVFilterPad *p)
{
return append_pad(&f->nb_inputs, &f->input_pads, &f->inputs, p);
}
int ff_append_inpad_free_name(AVFilterContext *f, AVFilterPad *p)
{
p->flags |= AVFILTERPAD_FLAG_FREE_NAME;
return ff_append_inpad(f, p);
}
int ff_append_outpad(AVFilterContext *f, AVFilterPad *p)
{
return append_pad(&f->nb_outputs, &f->output_pads, &f->outputs, p);
}
int ff_append_outpad_free_name(AVFilterContext *f, AVFilterPad *p)
{
p->flags |= AVFILTERPAD_FLAG_FREE_NAME;
return ff_append_outpad(f, p);
}
int avfilter_link(AVFilterContext *src, unsigned srcpad,
AVFilterContext *dst, unsigned dstpad)
{
FilterLinkInternal *li;
AVFilterLink *link;
av_assert0(src->graph);
av_assert0(dst->graph);
av_assert0(src->graph == dst->graph);
if (src->nb_outputs <= srcpad || dst->nb_inputs <= dstpad ||
src->outputs[srcpad] || dst->inputs[dstpad])
return AVERROR(EINVAL);
if (!fffilterctx(src)->initialized || !fffilterctx(dst)->initialized) {
av_log(src, AV_LOG_ERROR, "Filters must be initialized before linking.\n");
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 (%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);
}
li = av_mallocz(sizeof(*li));
if (!li)
return AVERROR(ENOMEM);
link = &li->l;
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;
av_assert0(AV_PIX_FMT_NONE == -1 && AV_SAMPLE_FMT_NONE == -1);
link->format = -1;
link->colorspace = AVCOL_SPC_UNSPECIFIED;
ff_framequeue_init(&li->fifo, &fffiltergraph(src->graph)->frame_queues);
return 0;
}
static void link_free(AVFilterLink **link)
{
FilterLinkInternal *li;
if (!*link)
return;
li = ff_link_internal(*link);
ff_framequeue_free(&li->fifo);
ff_frame_pool_uninit(&li->frame_pool);
av_channel_layout_uninit(&(*link)->ch_layout);
av_freep(link);
}
#if FF_API_LINK_PUBLIC
void avfilter_link_free(AVFilterLink **link)
{
link_free(link);
}
int avfilter_config_links(AVFilterContext *filter)
{
return ff_filter_config_links(filter);
}
#endif
static void update_link_current_pts(FilterLinkInternal *li, int64_t pts)
{
AVFilterLink *const link = &li->l;
if (pts == AV_NOPTS_VALUE)
return;
link->current_pts = pts;
link->current_pts_us = av_rescale_q(pts, link->time_base, AV_TIME_BASE_Q);
/* TODO use duration */
if (link->graph && li->age_index >= 0)
ff_avfilter_graph_update_heap(link->graph, li);
}
void ff_filter_set_ready(AVFilterContext *filter, unsigned priority)
{
filter->ready = FFMAX(filter->ready, priority);
}
/**
* Clear frame_blocked_in on all outputs.
* This is necessary whenever something changes on input.
*/
static void filter_unblock(AVFilterContext *filter)
{
unsigned i;
for (i = 0; i < filter->nb_outputs; i++) {
FilterLinkInternal * const li = ff_link_internal(filter->outputs[i]);
li->frame_blocked_in = 0;
}
}
void ff_avfilter_link_set_in_status(AVFilterLink *link, int status, int64_t pts)
{
FilterLinkInternal * const li = ff_link_internal(link);
if (li->status_in == status)
return;
av_assert0(!li->status_in);
li->status_in = status;
li->status_in_pts = pts;
link->frame_wanted_out = 0;
li->frame_blocked_in = 0;
filter_unblock(link->dst);
ff_filter_set_ready(link->dst, 200);
}
/**
* Set the status field of a link from the destination filter.
* The pts should probably be left unset (AV_NOPTS_VALUE).
*/
static void link_set_out_status(AVFilterLink *link, int status, int64_t pts)
{
FilterLinkInternal * const li = ff_link_internal(link);
av_assert0(!link->frame_wanted_out);
av_assert0(!li->status_out);
li->status_out = status;
if (pts != AV_NOPTS_VALUE)
update_link_current_pts(li, pts);
filter_unblock(link->dst);
ff_filter_set_ready(link->src, 200);
}
int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
{
int ret;
unsigned dstpad_idx = link->dstpad - link->dst->input_pads;
av_log(link->dst, AV_LOG_VERBOSE, "auto-inserting filter '%s' "
"between the filter '%s' and the filter '%s'\n",
filt->name, link->src->name, link->dst->name);
link->dst->inputs[dstpad_idx] = NULL;
if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) {
/* failed to link output filter to new filter */
link->dst->inputs[dstpad_idx] = link;
return ret;
}
/* re-hookup the link to the new destination filter we inserted */
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->outcfg.formats)
ff_formats_changeref(&link->outcfg.formats,
&filt->outputs[filt_dstpad_idx]->outcfg.formats);
if (link->outcfg.color_spaces)
ff_formats_changeref(&link->outcfg.color_spaces,
&filt->outputs[filt_dstpad_idx]->outcfg.color_spaces);
if (link->outcfg.color_ranges)
ff_formats_changeref(&link->outcfg.color_ranges,
&filt->outputs[filt_dstpad_idx]->outcfg.color_ranges);
if (link->outcfg.samplerates)
ff_formats_changeref(&link->outcfg.samplerates,
&filt->outputs[filt_dstpad_idx]->outcfg.samplerates);
if (link->outcfg.channel_layouts)
ff_channel_layouts_changeref(&link->outcfg.channel_layouts,
&filt->outputs[filt_dstpad_idx]->outcfg.channel_layouts);
return 0;
}
int ff_filter_config_links(AVFilterContext *filter)
{
int (*config_link)(AVFilterLink *);
unsigned i;
int ret;
for (i = 0; i < filter->nb_inputs; i ++) {
AVFilterLink *link = filter->inputs[i];
AVFilterLink *inlink;
FilterLinkInternal *li = ff_link_internal(link);
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 =
link->current_pts_us = AV_NOPTS_VALUE;
switch (li->init_state) {
case AVLINK_INIT:
continue;
case AVLINK_STARTINIT:
av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");
return 0;
case AVLINK_UNINIT:
li->init_state = AVLINK_STARTINIT;
if ((ret = ff_filter_config_links(link->src)) < 0)
return ret;
if (!(config_link = link->srcpad->config_props)) {
if (link->src->nb_inputs != 1) {
av_log(link->src, AV_LOG_ERROR, "Source filters and filters "
"with more than one input "
"must set config_props() "
"callbacks on all outputs\n");
return AVERROR(EINVAL);
}
} else if ((ret = config_link(link)) < 0) {
av_log(link->src, AV_LOG_ERROR,
"Failed to configure output pad on %s\n",
link->src->name);
return ret;
}
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->sample_aspect_ratio.num && !link->sample_aspect_ratio.den)
link->sample_aspect_ratio = inlink ?
inlink->sample_aspect_ratio : (AVRational){1,1};
if (inlink) {
if (!link->frame_rate.num && !link->frame_rate.den)
link->frame_rate = inlink->frame_rate;
if (!link->w)
link->w = inlink->w;
if (!link->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 (link->src->nb_inputs && link->src->inputs[0]->hw_frames_ctx &&
!(link->src->filter->flags_internal & FF_FILTER_FLAG_HWFRAME_AWARE)) {
av_assert0(!link->hw_frames_ctx &&
"should not be set by non-hwframe-aware filter");
link->hw_frames_ctx = av_buffer_ref(link->src->inputs[0]->hw_frames_ctx);
if (!link->hw_frames_ctx)
return AVERROR(ENOMEM);
}
if ((config_link = link->dstpad->config_props))
if ((ret = config_link(link)) < 0) {
av_log(link->dst, AV_LOG_ERROR,
"Failed to configure input pad on %s\n",
link->dst->name);
return ret;
}
li->init_state = AVLINK_INIT;
}
}
return 0;
}
#ifdef TRACE
void ff_tlog_link(void *ctx, AVFilterLink *link, int end)
{
if (link->type == AVMEDIA_TYPE_VIDEO) {
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 : "",
link->dst ? link->dst->filter->name : "",
end ? "\n" : "");
} else {
char buf[128];
av_channel_layout_describe(&link->ch_layout, buf, sizeof(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 : "",
end ? "\n" : "");
}
}
#endif
int ff_request_frame(AVFilterLink *link)
{
FilterLinkInternal * const li = ff_link_internal(link);
FF_TPRINTF_START(NULL, request_frame); ff_tlog_link(NULL, link, 1);
av_assert1(!link->dst->filter->activate);
if (li->status_out)
return li->status_out;
if (li->status_in) {
if (ff_framequeue_queued_frames(&li->fifo)) {
av_assert1(!link->frame_wanted_out);
av_assert1(link->dst->ready >= 300);
return 0;
} else {
/* Acknowledge status change. Filters using ff_request_frame() will
handle the change automatically. Filters can also check the
status directly but none do yet. */
link_set_out_status(link, li->status_in, li->status_in_pts);
return li->status_out;
}
}
link->frame_wanted_out = 1;
ff_filter_set_ready(link->src, 100);
return 0;
}
static int64_t guess_status_pts(AVFilterContext *ctx, int status, AVRational link_time_base)
{
unsigned i;
int64_t r = INT64_MAX;
for (i = 0; i < ctx->nb_inputs; i++) {
FilterLinkInternal * const li = ff_link_internal(ctx->inputs[i]);
if (li->status_out == status)
r = FFMIN(r, av_rescale_q(ctx->inputs[i]->current_pts, ctx->inputs[i]->time_base, link_time_base));
}
if (r < INT64_MAX)
return r;
av_log(ctx, AV_LOG_WARNING, "EOF timestamp not reliable\n");
for (i = 0; i < ctx->nb_inputs; i++) {
FilterLinkInternal * const li = ff_link_internal(ctx->inputs[i]);
r = FFMIN(r, av_rescale_q(li->status_in_pts, ctx->inputs[i]->time_base, link_time_base));
}
if (r < INT64_MAX)
return r;
return AV_NOPTS_VALUE;
}
static int ff_request_frame_to_filter(AVFilterLink *link)
{
FilterLinkInternal * const li = ff_link_internal(link);
int ret = -1;
FF_TPRINTF_START(NULL, request_frame_to_filter); ff_tlog_link(NULL, link, 1);
/* Assume the filter is blocked, let the method clear it if not */
li->frame_blocked_in = 1;
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 < 0) {
if (ret != AVERROR(EAGAIN) && ret != li->status_in)
ff_avfilter_link_set_in_status(link, ret, guess_status_pts(link->src, ret, link->time_base));
if (ret == AVERROR_EOF)
ret = 0;
}
return ret;
}
static const char *const var_names[] = {
"t",
"n",
#if FF_API_FRAME_PKT
"pos",
#endif
"w",
"h",
NULL
};
enum {
VAR_T,
VAR_N,
#if FF_API_FRAME_PKT
VAR_POS,
#endif
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;
}
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);
}
unsigned avfilter_filter_pad_count(const AVFilter *filter, int is_output)
{
return is_output ? filter->nb_outputs : filter->nb_inputs;
}
static const char *default_filter_name(void *filter_ctx)
{
AVFilterContext *ctx = filter_ctx;
return ctx->name ? ctx->name : ctx->filter->name;
}
static void *filter_child_next(void *obj, void *prev)
{
AVFilterContext *ctx = obj;
if (!prev && ctx->filter && ctx->filter->priv_class && ctx->priv)
return ctx->priv;
return NULL;
}
static const AVClass *filter_child_class_iterate(void **iter)
{
const AVFilter *f;
while ((f = av_filter_iterate(iter)))
if (f->priv_class)
return f->priv_class;
return NULL;
}
#define OFFSET(x) offsetof(AVFilterContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM
#define TFLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_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, .unit = "thread_type" },
{ "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .flags = FLAGS, .unit = "thread_type" },
{ "enable", "set enable expression", OFFSET(enable_str), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = TFLAGS },
{ "threads", "Allowed number of threads", OFFSET(nb_threads), AV_OPT_TYPE_INT,
{ .i64 = 0 }, 0, INT_MAX, FLAGS },
{ "extra_hw_frames", "Number of extra hardware frames to allocate for the user",
OFFSET(extra_hw_frames), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS },
{ NULL },
};
static const AVClass avfilter_class = {
.class_name = "AVFilter",
.item_name = default_filter_name,
.version = LIBAVUTIL_VERSION_INT,
.category = AV_CLASS_CATEGORY_FILTER,
.child_next = filter_child_next,
.child_class_iterate = filter_child_class_iterate,
.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)
{
FFFilterContext *ctx;
AVFilterContext *ret;
int preinited = 0;
if (!filter)
return NULL;
ctx = av_mallocz(sizeof(*ctx));
if (!ctx)
return NULL;
ret = &ctx->p;
ret->av_class = &avfilter_class;
ret->filter = filter;
ret->name = inst_name ? av_strdup(inst_name) : NULL;
if (filter->priv_size) {
ret->priv = av_mallocz(filter->priv_size);
if (!ret->priv)
goto err;
}
if (filter->preinit) {
if (filter->preinit(ret) < 0)
goto err;
preinited = 1;
}
av_opt_set_defaults(ret);
if (filter->priv_class) {
*(const AVClass**)ret->priv = filter->priv_class;
av_opt_set_defaults(ret->priv);
}
ctx->execute = default_execute;
ret->nb_inputs = filter->nb_inputs;
if (ret->nb_inputs ) {
ret->input_pads = av_memdup(filter->inputs, ret->nb_inputs * sizeof(*filter->inputs));
if (!ret->input_pads)
goto err;
ret->inputs = av_calloc(ret->nb_inputs, sizeof(*ret->inputs));
if (!ret->inputs)
goto err;
}
ret->nb_outputs = filter->nb_outputs;
if (ret->nb_outputs) {
ret->output_pads = av_memdup(filter->outputs, ret->nb_outputs * sizeof(*filter->outputs));
if (!ret->output_pads)
goto err;
ret->outputs = av_calloc(ret->nb_outputs, sizeof(*ret->outputs));
if (!ret->outputs)
goto err;
}
return ret;
err:
if (preinited)
filter->uninit(ret);
av_freep(&ret->inputs);
av_freep(&ret->input_pads);
ret->nb_inputs = 0;
av_freep(&ret->outputs);
av_freep(&ret->output_pads);
ret->nb_outputs = 0;
av_freep(&ret->priv);
av_free(ret);
return NULL;
}
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;
av_buffer_unref(&link->hw_frames_ctx);
ff_formats_unref(&link->incfg.formats);
ff_formats_unref(&link->outcfg.formats);
ff_formats_unref(&link->incfg.color_spaces);
ff_formats_unref(&link->outcfg.color_spaces);
ff_formats_unref(&link->incfg.color_ranges);
ff_formats_unref(&link->outcfg.color_ranges);
ff_formats_unref(&link->incfg.samplerates);
ff_formats_unref(&link->outcfg.samplerates);
ff_channel_layouts_unref(&link->incfg.channel_layouts);
ff_channel_layouts_unref(&link->outcfg.channel_layouts);
link_free(&link);
}
void avfilter_free(AVFilterContext *filter)
{
int i;
if (!filter)
return;
if (filter->graph)
ff_filter_graph_remove_filter(filter->graph, filter);
if (filter->filter->uninit)
filter->filter->uninit(filter);
for (i = 0; i < filter->nb_inputs; i++) {
free_link(filter->inputs[i]);
if (filter->input_pads[i].flags & AVFILTERPAD_FLAG_FREE_NAME)
av_freep(&filter->input_pads[i].name);
}
for (i = 0; i < filter->nb_outputs; i++) {
free_link(filter->outputs[i]);
if (filter->output_pads[i].flags & AVFILTERPAD_FLAG_FREE_NAME)
av_freep(&filter->output_pads[i].name);
}
if (filter->filter->priv_class)
av_opt_free(filter->priv);
av_buffer_unref(&filter->hw_device_ctx);
av_freep(&filter->name);
av_freep(&filter->input_pads);
av_freep(&filter->output_pads);
av_freep(&filter->inputs);
av_freep(&filter->outputs);
av_freep(&filter->priv);
while(filter->command_queue){
command_queue_pop(filter);
}
av_opt_free(filter);
av_expr_free(filter->enable);
filter->enable = NULL;
av_freep(&filter->var_values);
av_free(filter);
}
int ff_filter_get_nb_threads(AVFilterContext *ctx)
{
if (ctx->nb_threads > 0)
return FFMIN(ctx->nb_threads, ctx->graph->nb_threads);
return ctx->graph->nb_threads;
}
int ff_filter_opt_parse(void *logctx, const AVClass *priv_class,
AVDictionary **options, const char *args)
{
const AVOption *o = NULL;
int ret;
char *av_uninit(parsed_key), *av_uninit(value);
const char *key;
int offset= -1;
if (!args)
return 0;
while (*args) {
const char *shorthand = NULL;
if (priv_class)
o = av_opt_next(&priv_class, o);
if (o) {
if (o->type == AV_OPT_TYPE_CONST || o->offset == offset)
continue;
offset = o->offset;
shorthand = o->name;
}
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(logctx, AV_LOG_ERROR, "No option name near '%s'\n", args);
else
av_log(logctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", args,
av_err2str(ret));
return ret;
}
if (*args)
args++;
if (parsed_key) {
key = parsed_key;
/* discard all remaining shorthand */
if (priv_class)
while ((o = av_opt_next(&priv_class, o)));
} else {
key = shorthand;
}
av_log(logctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);
av_dict_set(options, key, value, AV_DICT_MULTIKEY);
av_free(value);
av_free(parsed_key);
}
return 0;
}
int ff_filter_process_command(AVFilterContext *ctx, const char *cmd,
const char *arg, char *res, int res_len, int flags)
{
const AVOption *o;
if (!ctx->filter->priv_class)
return 0;
o = av_opt_find2(ctx->priv, cmd, NULL, AV_OPT_FLAG_RUNTIME_PARAM | AV_OPT_FLAG_FILTERING_PARAM, AV_OPT_SEARCH_CHILDREN, NULL);
if (!o)
return AVERROR(ENOSYS);
return av_opt_set(ctx->priv, cmd, arg, 0);
}
int avfilter_init_dict(AVFilterContext *ctx, AVDictionary **options)
{
FFFilterContext *ctxi = fffilterctx(ctx);
int ret = 0;
if (ctxi->initialized) {
av_log(ctx, AV_LOG_ERROR, "Filter already initialized\n");
return AVERROR(EINVAL);
}
ret = av_opt_set_dict2(ctx, options, AV_OPT_SEARCH_CHILDREN);
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 &&
fffiltergraph(ctx->graph)->thread_execute) {
ctx->thread_type = AVFILTER_THREAD_SLICE;
ctxi->execute = fffiltergraph(ctx->graph)->thread_execute;
} else {
ctx->thread_type = 0;
}
if (ctx->filter->init)
ret = ctx->filter->init(ctx);
if (ret < 0)
return ret;
if (ctx->enable_str) {
ret = set_enable_expr(ctx, ctx->enable_str);
if (ret < 0)
return ret;
}
ctxi->initialized = 1;
return 0;
}
int avfilter_init_str(AVFilterContext *filter, const char *args)
{
AVDictionary *options = NULL;
AVDictionaryEntry *e;
int ret = 0;
if (args && *args) {
ret = ff_filter_opt_parse(filter, filter->filter->priv_class, &options, args);
if (ret < 0)
goto fail;
}
ret = avfilter_init_dict(filter, &options);
if (ret < 0)
goto fail;
if ((e = av_dict_get(options, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
av_log(filter, AV_LOG_ERROR, "No such option: %s.\n", e->key);
ret = AVERROR_OPTION_NOT_FOUND;
goto fail;
}
fail:
av_dict_free(&options);
return ret;
}
const char *avfilter_pad_get_name(const AVFilterPad *pads, int pad_idx)
{
return pads[pad_idx].name;
}
enum AVMediaType avfilter_pad_get_type(const AVFilterPad *pads, int pad_idx)
{
return pads[pad_idx].type;
}
static int default_filter_frame(AVFilterLink *link, AVFrame *frame)
{
return ff_filter_frame(link->dst->outputs[0], frame);
}
static int ff_filter_frame_framed(AVFilterLink *link, AVFrame *frame)
{
int (*filter_frame)(AVFilterLink *, AVFrame *);
AVFilterContext *dstctx = link->dst;
AVFilterPad *dst = link->dstpad;
int ret;
if (!(filter_frame = dst->filter_frame))
filter_frame = default_filter_frame;
if (dst->flags & AVFILTERPAD_FLAG_NEEDS_WRITABLE) {
ret = ff_inlink_make_frame_writable(link, &frame);
if (ret < 0)
goto fail;