mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-28 20:53:54 +02:00
342 lines
9.6 KiB
C
342 lines
9.6 KiB
C
/*
|
|
* 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
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* feedback video filter
|
|
*/
|
|
|
|
#include "libavutil/fifo.h"
|
|
#include "libavutil/imgutils.h"
|
|
#include "libavutil/opt.h"
|
|
#include "libavutil/internal.h"
|
|
#include "avfilter.h"
|
|
#include "filters.h"
|
|
#include "formats.h"
|
|
#include "video.h"
|
|
|
|
typedef struct FeedbackContext {
|
|
const AVClass *class;
|
|
|
|
int x, y;
|
|
int w, h;
|
|
|
|
int max_step[4];
|
|
int hsub, vsub;
|
|
|
|
AVFrame *feed;
|
|
|
|
AVFifo *fifo;
|
|
} FeedbackContext;
|
|
|
|
static void adjust_pos(AVFilterContext *ctx, FeedbackContext *s)
|
|
{
|
|
if (s->x + s->w > ctx->inputs[0]->w)
|
|
s->x = ctx->inputs[0]->w - s->w;
|
|
if (s->y + s->h > ctx->inputs[0]->h)
|
|
s->y = ctx->inputs[0]->h - s->h;
|
|
}
|
|
|
|
static void adjust_parameters(AVFilterContext *ctx, FeedbackContext *s)
|
|
{
|
|
if (s->x >= ctx->inputs[0]->w)
|
|
s->x = 0;
|
|
if (s->y >= ctx->inputs[0]->h)
|
|
s->y = 0;
|
|
|
|
if (s->w <= 0)
|
|
s->w = ctx->inputs[0]->w - s->x;
|
|
if (s->h <= 0)
|
|
s->h = ctx->inputs[0]->h - s->y;
|
|
|
|
if (s->w > ctx->inputs[0]->w)
|
|
s->w = ctx->inputs[0]->w;
|
|
if (s->h > ctx->inputs[0]->h)
|
|
s->h = ctx->inputs[0]->h;
|
|
|
|
adjust_pos(ctx, s);
|
|
}
|
|
|
|
static int config_input(AVFilterLink *inlink)
|
|
{
|
|
AVFilterContext *ctx = inlink->dst;
|
|
const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format);
|
|
FeedbackContext *s = ctx->priv;
|
|
|
|
s->hsub = pix_desc->log2_chroma_w;
|
|
s->vsub = pix_desc->log2_chroma_h;
|
|
|
|
av_image_fill_max_pixsteps(s->max_step, NULL, pix_desc);
|
|
|
|
adjust_parameters(ctx, s);
|
|
|
|
ctx->inputs[1]->w = s->w;
|
|
ctx->inputs[1]->h = s->h;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int config_output(AVFilterLink *outlink)
|
|
{
|
|
AVFilterContext *ctx = outlink->src;
|
|
FeedbackContext *s = ctx->priv;
|
|
|
|
adjust_parameters(ctx, s);
|
|
|
|
ctx->outputs[0]->w = ctx->inputs[0]->w;
|
|
ctx->outputs[0]->h = ctx->inputs[0]->h;
|
|
ctx->outputs[1]->w = s->w;
|
|
ctx->outputs[1]->h = s->h;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int query_formats(const AVFilterContext *ctx,
|
|
AVFilterFormatsConfig **cfg_in,
|
|
AVFilterFormatsConfig **cfg_out)
|
|
{
|
|
return ff_set_common_formats2(ctx, cfg_in, cfg_out,
|
|
ff_formats_pixdesc_filter(0, AV_PIX_FMT_FLAG_BITSTREAM |
|
|
AV_PIX_FMT_FLAG_HWACCEL |
|
|
AV_PIX_FMT_FLAG_PAL));
|
|
}
|
|
|
|
static int activate(AVFilterContext *ctx)
|
|
{
|
|
FeedbackContext *s = ctx->priv;
|
|
int status, ret;
|
|
int64_t pts;
|
|
|
|
adjust_pos(ctx, s);
|
|
|
|
for (int i = 0; i < ctx->nb_outputs; i++)
|
|
FF_FILTER_FORWARD_STATUS_BACK_ALL(ctx->outputs[i], ctx);
|
|
|
|
if (!s->feed) {
|
|
ret = ff_inlink_consume_frame(ctx->inputs[1], &s->feed);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
if (s->feed && av_fifo_can_read(s->fifo)) {
|
|
AVFrame *src = s->feed;
|
|
AVFrame *dst = NULL;
|
|
|
|
av_fifo_read(s->fifo, &dst, 1);
|
|
if (!dst)
|
|
return AVERROR_BUG;
|
|
|
|
if (!av_frame_is_writable(dst)) {
|
|
AVFrame *tmp = ff_get_video_buffer(ctx->outputs[0], ctx->outputs[0]->w, ctx->outputs[0]->h);
|
|
|
|
if (!tmp) {
|
|
av_frame_free(&dst);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
ret = av_frame_copy(tmp, dst);
|
|
if (ret < 0) {
|
|
av_frame_free(&dst);
|
|
av_frame_free(&tmp);
|
|
return ret;
|
|
}
|
|
|
|
av_frame_copy_props(tmp, dst);
|
|
av_frame_free(&dst);
|
|
dst = tmp;
|
|
}
|
|
|
|
for (int y = 0; y < src->height; y++) {
|
|
memmove(dst->data[0] + (s->y + y) * dst->linesize[0] + s->x * s->max_step[0],
|
|
src->data[0] + y * src->linesize[0], src->width * s->max_step[0]);
|
|
}
|
|
|
|
for (int i = 1; i < 3; i++) {
|
|
if (dst->data[i]) {
|
|
for (int y = 0; y < src->height; y++) {
|
|
memmove(dst->data[i] + ((s->y + y) >> s->vsub) * dst->linesize[i] + (s->x >> s->hsub) * s->max_step[i],
|
|
src->data[i] + (y >> s->vsub) * src->linesize[i], (src->width >> s->hsub) * s->max_step[i]);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (dst->data[3]) {
|
|
for (int y = 0; y < src->height; y++) {
|
|
memmove(dst->data[3] + (s->y + y) * dst->linesize[3] + s->x * s->max_step[3],
|
|
src->data[3] + y * src->linesize[3], src->width * s->max_step[3]);
|
|
}
|
|
}
|
|
|
|
ret = ff_filter_frame(ctx->outputs[0], dst);
|
|
av_frame_free(&s->feed);
|
|
return ret;
|
|
}
|
|
|
|
if (!s->feed || ctx->is_disabled) {
|
|
AVFrame *in = NULL;
|
|
|
|
ret = ff_inlink_consume_frame(ctx->inputs[0], &in);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (ret > 0 && ctx->is_disabled)
|
|
return ff_filter_frame(ctx->outputs[0], in);
|
|
|
|
if (ret > 0) {
|
|
AVFrame *frame;
|
|
|
|
ret = av_fifo_write(s->fifo, &in, 1);
|
|
if (ret < 0) {
|
|
av_frame_free(&in);
|
|
return ret;
|
|
}
|
|
|
|
frame = av_frame_clone(in);
|
|
if (!frame)
|
|
return AVERROR(ENOMEM);
|
|
|
|
frame->width = s->w;
|
|
frame->height = s->h;
|
|
|
|
frame->data[0] += s->y * frame->linesize[0];
|
|
frame->data[0] += s->x * s->max_step[0];
|
|
|
|
for (int i = 1; i < 3; i ++) {
|
|
if (frame->data[i]) {
|
|
frame->data[i] += (s->y >> s->vsub) * frame->linesize[i];
|
|
frame->data[i] += (s->x >> s->hsub) * s->max_step[i];
|
|
}
|
|
}
|
|
|
|
if (frame->data[3]) {
|
|
frame->data[3] += s->y * frame->linesize[3];
|
|
frame->data[3] += s->x * s->max_step[3];
|
|
}
|
|
|
|
return ff_filter_frame(ctx->outputs[1], frame);
|
|
}
|
|
}
|
|
|
|
if (ff_inlink_acknowledge_status(ctx->inputs[0], &status, &pts)) {
|
|
ff_outlink_set_status(ctx->outputs[0], status, pts);
|
|
ff_outlink_set_status(ctx->outputs[1], status, pts);
|
|
return 0;
|
|
}
|
|
|
|
if (ff_inlink_acknowledge_status(ctx->inputs[1], &status, &pts)) {
|
|
ff_outlink_set_status(ctx->outputs[0], status, pts);
|
|
ff_outlink_set_status(ctx->outputs[1], status, pts);
|
|
return 0;
|
|
}
|
|
|
|
if (!s->feed || ctx->is_disabled) {
|
|
if (ff_outlink_frame_wanted(ctx->outputs[0])) {
|
|
ff_inlink_request_frame(ctx->inputs[0]);
|
|
if (!ctx->is_disabled)
|
|
ff_inlink_request_frame(ctx->inputs[1]);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return FFERROR_NOT_READY;
|
|
}
|
|
|
|
static av_cold int init(AVFilterContext *ctx)
|
|
{
|
|
FeedbackContext *s = ctx->priv;
|
|
|
|
s->fifo = av_fifo_alloc2(8, sizeof(AVFrame *), AV_FIFO_FLAG_AUTO_GROW);
|
|
if (!s->fifo)
|
|
return AVERROR(ENOMEM);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static av_cold void uninit(AVFilterContext *ctx)
|
|
{
|
|
FeedbackContext *s = ctx->priv;
|
|
if (s->fifo) {
|
|
size_t size = av_fifo_can_read(s->fifo);
|
|
|
|
for (size_t n = 0; n < size; n++) {
|
|
AVFrame *frame = NULL;
|
|
|
|
av_fifo_read(s->fifo, &frame, 1);
|
|
|
|
av_frame_free(&frame);
|
|
}
|
|
|
|
av_fifo_freep2(&s->fifo);
|
|
}
|
|
}
|
|
|
|
static const AVFilterPad inputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.config_props = config_input,
|
|
},
|
|
{
|
|
.name = "feedin",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.config_props = config_input,
|
|
},
|
|
};
|
|
|
|
static const AVFilterPad outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.config_props = config_output,
|
|
},
|
|
{
|
|
.name = "feedout",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.config_props = config_output,
|
|
},
|
|
};
|
|
|
|
#define OFFSET(x) offsetof(FeedbackContext, x)
|
|
#define FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM)
|
|
#define TFLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_RUNTIME_PARAM)
|
|
|
|
static const AVOption feedback_options[] = {
|
|
{ "x", "set top left crop position", OFFSET(x), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, TFLAGS },
|
|
{ "y", "set top left crop position", OFFSET(y), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, TFLAGS },
|
|
{ "w", "set crop size", OFFSET(w), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
|
|
{ "h", "set crop size", OFFSET(h), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
|
|
{ NULL }
|
|
};
|
|
|
|
AVFILTER_DEFINE_CLASS(feedback);
|
|
|
|
const AVFilter ff_vf_feedback = {
|
|
.name = "feedback",
|
|
.description = NULL_IF_CONFIG_SMALL("Apply feedback video filter."),
|
|
.priv_class = &feedback_class,
|
|
.priv_size = sizeof(FeedbackContext),
|
|
.activate = activate,
|
|
.init = init,
|
|
.uninit = uninit,
|
|
FILTER_INPUTS(inputs),
|
|
FILTER_OUTPUTS(outputs),
|
|
FILTER_QUERY_FUNC2(query_formats),
|
|
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
|
|
.process_command = ff_filter_process_command,
|
|
};
|