mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
244 lines
8.5 KiB
244 lines
8.5 KiB
/* |
|
* Copyright (c) 2018 Paul B Mahol |
|
* |
|
* 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/channel_layout.h" |
|
#include "libavutil/opt.h" |
|
#include "avfilter.h" |
|
#include "audio.h" |
|
#include "filters.h" |
|
#include "formats.h" |
|
#include "drawutils.h" |
|
#include "video.h" |
|
|
|
enum PadMode { |
|
MODE_ADD = 0, |
|
MODE_CLONE, |
|
NB_MODE |
|
}; |
|
|
|
typedef struct TPadContext { |
|
const AVClass *class; |
|
int pad_start; |
|
int pad_stop; |
|
int start_mode; |
|
int stop_mode; |
|
int64_t start_duration; |
|
int64_t stop_duration; |
|
uint8_t rgba_color[4]; ///< color for the padding area |
|
|
|
FFDrawContext draw; |
|
FFDrawColor color; |
|
int64_t pts; |
|
int eof; |
|
AVFrame *cache_start; |
|
AVFrame *cache_stop; |
|
} TPadContext; |
|
|
|
#define OFFSET(x) offsetof(TPadContext, x) |
|
#define VF AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM |
|
|
|
static const AVOption tpad_options[] = { |
|
{ "start", "set the number of frames to delay input", OFFSET(pad_start), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, VF }, |
|
{ "stop", "set the number of frames to add after input finished", OFFSET(pad_stop), AV_OPT_TYPE_INT, {.i64=0}, -1, INT_MAX, VF }, |
|
{ "start_mode", "set the mode of added frames to start", OFFSET(start_mode), AV_OPT_TYPE_INT, {.i64=MODE_ADD}, 0, NB_MODE-1, VF, .unit = "mode" }, |
|
{ "add", "add solid-color frames", 0, AV_OPT_TYPE_CONST, {.i64=MODE_ADD}, 0, 0, VF, .unit = "mode" }, |
|
{ "clone", "clone first/last frame", 0, AV_OPT_TYPE_CONST, {.i64=MODE_CLONE}, 0, 0, VF, .unit = "mode" }, |
|
{ "stop_mode", "set the mode of added frames to end", OFFSET(stop_mode), AV_OPT_TYPE_INT, {.i64=MODE_ADD}, 0, NB_MODE-1, VF, .unit = "mode" }, |
|
{ "start_duration", "set the duration to delay input", OFFSET(start_duration), AV_OPT_TYPE_DURATION, {.i64=0}, 0, INT64_MAX, VF }, |
|
{ "stop_duration", "set the duration to pad input", OFFSET(stop_duration), AV_OPT_TYPE_DURATION, {.i64=0}, 0, INT64_MAX, VF }, |
|
{ "color", "set the color of the added frames", OFFSET(rgba_color), AV_OPT_TYPE_COLOR, {.str="black"}, 0, 0, VF }, |
|
{ NULL } |
|
}; |
|
|
|
AVFILTER_DEFINE_CLASS(tpad); |
|
|
|
static int needs_drawing(const TPadContext *s) { |
|
return ( |
|
(s->stop_mode == MODE_ADD && (s->pad_stop != 0 || s->stop_duration != 0)) || |
|
(s->start_mode == MODE_ADD && (s->pad_start != 0 || s->start_duration != 0)) |
|
); |
|
} |
|
|
|
static int query_formats(AVFilterContext *ctx) |
|
{ |
|
TPadContext *s = ctx->priv; |
|
if (needs_drawing(s)) |
|
return ff_set_common_formats(ctx, ff_draw_supported_pixel_formats(0)); |
|
|
|
return ff_set_common_formats(ctx, ff_all_formats(AVMEDIA_TYPE_VIDEO)); |
|
} |
|
|
|
static int activate(AVFilterContext *ctx) |
|
{ |
|
AVFilterLink *inlink = ctx->inputs[0]; |
|
AVFilterLink *outlink = ctx->outputs[0]; |
|
FilterLink *l = ff_filter_link(outlink); |
|
TPadContext *s = ctx->priv; |
|
AVFrame *frame = NULL; |
|
int ret, status; |
|
int64_t duration, pts; |
|
|
|
FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink); |
|
|
|
if (!s->eof && ff_inlink_acknowledge_status(inlink, &status, &pts)) { |
|
if (status == AVERROR_EOF) { |
|
pts = av_rescale_q(pts, inlink->time_base, outlink->time_base); |
|
if (!s->pad_stop && !s->pad_start) { |
|
ff_outlink_set_status(outlink, status, pts); |
|
return 0; |
|
} |
|
s->eof = 1; |
|
s->pts += pts; |
|
} |
|
} |
|
|
|
if (s->start_mode == MODE_ADD && s->pad_start > 0 && ff_outlink_frame_wanted(outlink)) { |
|
frame = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
|
if (!frame) |
|
return AVERROR(ENOMEM); |
|
ff_fill_rectangle(&s->draw, &s->color, |
|
frame->data, frame->linesize, |
|
0, 0, frame->width, frame->height); |
|
duration = av_rescale_q(1, av_inv_q(l->frame_rate), outlink->time_base); |
|
frame->pts = s->pts; |
|
frame->duration = duration; |
|
s->pts += duration; |
|
s->pad_start--; |
|
return ff_filter_frame(outlink, frame); |
|
} |
|
|
|
if (s->start_mode == MODE_CLONE && s->pad_start > 0) { |
|
if (s->eof) { |
|
ff_outlink_set_status(outlink, AVERROR_EOF, 0); |
|
return 0; |
|
} else if (!s->cache_start && ff_inlink_queued_frames(inlink)) { |
|
s->cache_start = ff_inlink_peek_frame(inlink, 0); |
|
} else if (!s->cache_start) { |
|
FF_FILTER_FORWARD_WANTED(outlink, inlink); |
|
} |
|
frame = av_frame_clone(s->cache_start); |
|
if (!frame) |
|
return AVERROR(ENOMEM); |
|
duration = av_rescale_q(1, av_inv_q(l->frame_rate), outlink->time_base); |
|
frame->pts = s->pts; |
|
frame->duration = duration; |
|
s->pts += duration; |
|
s->pad_start--; |
|
if (s->pad_start == 0) |
|
s->cache_start = NULL; |
|
return ff_filter_frame(outlink, frame); |
|
} |
|
|
|
if (!s->eof && !s->pad_start) { |
|
ret = ff_inlink_consume_frame(inlink, &frame); |
|
if (ret < 0) |
|
return ret; |
|
if (ret > 0) { |
|
if (s->stop_mode == MODE_CLONE && s->pad_stop != 0) { |
|
av_frame_free(&s->cache_stop); |
|
s->cache_stop = av_frame_clone(frame); |
|
} |
|
frame->pts += s->pts; |
|
return ff_filter_frame(outlink, frame); |
|
} |
|
} |
|
|
|
if (s->eof) { |
|
if (!s->pad_stop) { |
|
ff_outlink_set_status(outlink, AVERROR_EOF, s->pts); |
|
return 0; |
|
} |
|
if (s->stop_mode == MODE_ADD) { |
|
frame = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
|
if (!frame) |
|
return AVERROR(ENOMEM); |
|
ff_fill_rectangle(&s->draw, &s->color, |
|
frame->data, frame->linesize, |
|
0, 0, frame->width, frame->height); |
|
} else if (s->stop_mode == MODE_CLONE) { |
|
if (!s->cache_stop) { |
|
s->pad_stop = 0; |
|
ff_outlink_set_status(outlink, AVERROR_EOF, s->pts); |
|
return 0; |
|
} |
|
frame = av_frame_clone(s->cache_stop); |
|
if (!frame) |
|
return AVERROR(ENOMEM); |
|
} |
|
duration = av_rescale_q(1, av_inv_q(l->frame_rate), outlink->time_base); |
|
frame->pts = s->pts; |
|
frame->duration = duration; |
|
s->pts += duration; |
|
if (s->pad_stop > 0) |
|
s->pad_stop--; |
|
return ff_filter_frame(outlink, frame); |
|
} |
|
|
|
if (!s->pad_start) |
|
FF_FILTER_FORWARD_WANTED(outlink, inlink); |
|
|
|
return FFERROR_NOT_READY; |
|
} |
|
|
|
static int config_input(AVFilterLink *inlink) |
|
{ |
|
AVFilterContext *ctx = inlink->dst; |
|
FilterLink *l = ff_filter_link(inlink); |
|
TPadContext *s = ctx->priv; |
|
|
|
if (needs_drawing(s)) { |
|
ff_draw_init2(&s->draw, inlink->format, inlink->colorspace, inlink->color_range, 0); |
|
ff_draw_color(&s->draw, &s->color, s->rgba_color); |
|
} |
|
|
|
if (s->start_duration) |
|
s->pad_start = av_rescale_q(s->start_duration, l->frame_rate, av_inv_q(AV_TIME_BASE_Q)); |
|
if (s->stop_duration) |
|
s->pad_stop = av_rescale_q(s->stop_duration, l->frame_rate, av_inv_q(AV_TIME_BASE_Q)); |
|
|
|
return 0; |
|
} |
|
|
|
static av_cold void uninit(AVFilterContext *ctx) |
|
{ |
|
TPadContext *s = ctx->priv; |
|
|
|
av_frame_free(&s->cache_stop); |
|
} |
|
|
|
static const AVFilterPad tpad_inputs[] = { |
|
{ |
|
.name = "default", |
|
.type = AVMEDIA_TYPE_VIDEO, |
|
.config_props = config_input, |
|
}, |
|
}; |
|
|
|
const AVFilter ff_vf_tpad = { |
|
.name = "tpad", |
|
.description = NULL_IF_CONFIG_SMALL("Temporarily pad video frames."), |
|
.priv_size = sizeof(TPadContext), |
|
.priv_class = &tpad_class, |
|
.activate = activate, |
|
.uninit = uninit, |
|
FILTER_INPUTS(tpad_inputs), |
|
FILTER_OUTPUTS(ff_video_default_filterpad), |
|
FILTER_QUERY_FUNC(query_formats), |
|
};
|
|
|