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| /* |
| * Copyright (c) 2010 Brandon Mintern |
| * 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 |
| */ |
| |
| /** |
| * @file |
| * video fade filter |
| * based heavily on vf_negate.c by Bobby Bingham |
| */ |
| |
| #include "libavutil/avstring.h" |
| #include "libavutil/common.h" |
| #include "libavutil/eval.h" |
| #include "libavutil/opt.h" |
| #include "libavutil/pixdesc.h" |
| #include "avfilter.h" |
| #include "drawutils.h" |
| #include "formats.h" |
| #include "internal.h" |
| #include "video.h" |
| |
| #define R 0 |
| #define G 1 |
| #define B 2 |
| #define A 3 |
| |
| #define Y 0 |
| #define U 1 |
| #define V 2 |
| |
| #define FADE_IN 0 |
| #define FADE_OUT 1 |
| |
| typedef struct { |
| const AVClass *class; |
| int type; |
| int factor, fade_per_frame; |
| int start_frame, nb_frames; |
| unsigned int frame_index; |
| int hsub, vsub, bpp; |
| unsigned int black_level, black_level_scaled; |
| uint8_t is_packed_rgb; |
| uint8_t rgba_map[4]; |
| int alpha; |
| uint64_t start_time, duration; |
| enum {VF_FADE_WAITING=0, VF_FADE_FADING, VF_FADE_DONE} fade_state; |
| } FadeContext; |
| |
| static av_cold int init(AVFilterContext *ctx) |
| { |
| FadeContext *s = ctx->priv; |
| |
| s->fade_per_frame = (1 << 16) / s->nb_frames; |
| s->fade_state = VF_FADE_WAITING; |
| |
| if (s->duration != 0) { |
| // If duration (seconds) is non-zero, assume that we are not fading based on frames |
| s->nb_frames = 0; // Mostly to clean up logging |
| } |
| |
| // Choose what to log. If both time-based and frame-based options, both lines will be in the log |
| if (s->start_frame || s->nb_frames) { |
| av_log(ctx, AV_LOG_VERBOSE, |
| "type:%s start_frame:%d nb_frames:%d alpha:%d\n", |
| s->type == FADE_IN ? "in" : "out", s->start_frame, |
| s->nb_frames,s->alpha); |
| } |
| if (s->start_time || s->duration) { |
| av_log(ctx, AV_LOG_VERBOSE, |
| "type:%s start_time:%f duration:%f alpha:%d\n", |
| s->type == FADE_IN ? "in" : "out", (s->start_time / (double)AV_TIME_BASE), |
| (s->duration / (double)AV_TIME_BASE),s->alpha); |
| } |
| |
| return 0; |
| } |
| |
| static int query_formats(AVFilterContext *ctx) |
| { |
| static const enum AVPixelFormat pix_fmts[] = { |
| AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, |
| AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P, |
| AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P, |
| AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUVJ440P, |
| AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P, |
| AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24, |
| AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR, |
| AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA, |
| AV_PIX_FMT_NONE |
| }; |
| |
| ff_set_common_formats(ctx, ff_make_format_list(pix_fmts)); |
| return 0; |
| } |
| |
| const static enum AVPixelFormat studio_level_pix_fmts[] = { |
| AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, |
| AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P, |
| AV_PIX_FMT_YUV440P, |
| AV_PIX_FMT_NONE |
| }; |
| |
| static int config_props(AVFilterLink *inlink) |
| { |
| FadeContext *s = inlink->dst->priv; |
| const AVPixFmtDescriptor *pixdesc = av_pix_fmt_desc_get(inlink->format); |
| |
| s->hsub = pixdesc->log2_chroma_w; |
| s->vsub = pixdesc->log2_chroma_h; |
| |
| s->bpp = av_get_bits_per_pixel(pixdesc) >> 3; |
| s->alpha &= !!(pixdesc->flags & AV_PIX_FMT_FLAG_ALPHA); |
| s->is_packed_rgb = ff_fill_rgba_map(s->rgba_map, inlink->format) >= 0; |
| |
| /* use CCIR601/709 black level for studio-level pixel non-alpha components */ |
| s->black_level = |
| ff_fmt_is_in(inlink->format, studio_level_pix_fmts) && !s->alpha ? 16 : 0; |
| /* 32768 = 1 << 15, it is an integer representation |
| * of 0.5 and is for rounding. */ |
| s->black_level_scaled = (s->black_level << 16) + 32768; |
| return 0; |
| } |
| |
| static int filter_slice_luma(AVFilterContext *ctx, void *arg, int jobnr, |
| int nb_jobs) |
| { |
| FadeContext *s = ctx->priv; |
| AVFrame *frame = arg; |
| int slice_start = (frame->height * jobnr ) / nb_jobs; |
| int slice_end = (frame->height * (jobnr+1)) / nb_jobs; |
| int i, j; |
| |
| for (i = slice_start; i < slice_end; i++) { |
| uint8_t *p = frame->data[0] + i * frame->linesize[0]; |
| for (j = 0; j < frame->width * s->bpp; j++) { |
| /* s->factor is using 16 lower-order bits for decimal |
| * places. 32768 = 1 << 15, it is an integer representation |
| * of 0.5 and is for rounding. */ |
| *p = ((*p - s->black_level) * s->factor + s->black_level_scaled) >> 16; |
| p++; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int filter_slice_chroma(AVFilterContext *ctx, void *arg, int jobnr, |
| int nb_jobs) |
| { |
| FadeContext *s = ctx->priv; |
| AVFrame *frame = arg; |
| int i, j, plane; |
| const int width = FF_CEIL_RSHIFT(frame->width, s->hsub); |
| const int height= FF_CEIL_RSHIFT(frame->height, s->vsub); |
| int slice_start = (height * jobnr ) / nb_jobs; |
| int slice_end = (height * (jobnr+1)) / nb_jobs; |
| |
| for (plane = 1; plane < 3; plane++) { |
| for (i = slice_start; i < slice_end; i++) { |
| uint8_t *p = frame->data[plane] + i * frame->linesize[plane]; |
| for (j = 0; j < width; j++) { |
| /* 8421367 = ((128 << 1) + 1) << 15. It is an integer |
| * representation of 128.5. The .5 is for rounding |
| * purposes. */ |
| *p = ((*p - 128) * s->factor + 8421367) >> 16; |
| p++; |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int filter_slice_alpha(AVFilterContext *ctx, void *arg, int jobnr, |
| int nb_jobs) |
| { |
| FadeContext *s = ctx->priv; |
| AVFrame *frame = arg; |
| int plane = s->is_packed_rgb ? 0 : A; |
| int slice_start = (frame->height * jobnr ) / nb_jobs; |
| int slice_end = (frame->height * (jobnr+1)) / nb_jobs; |
| int i, j; |
| |
| for (i = slice_start; i < slice_end; i++) { |
| uint8_t *p = frame->data[plane] + i * frame->linesize[plane] + s->is_packed_rgb*s->rgba_map[A]; |
| int step = s->is_packed_rgb ? 4 : 1; |
| for (j = 0; j < frame->width; j++) { |
| /* s->factor is using 16 lower-order bits for decimal |
| * places. 32768 = 1 << 15, it is an integer representation |
| * of 0.5 and is for rounding. */ |
| *p = ((*p - s->black_level) * s->factor + s->black_level_scaled) >> 16; |
| p += step; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int filter_frame(AVFilterLink *inlink, AVFrame *frame) |
| { |
| AVFilterContext *ctx = inlink->dst; |
| FadeContext *s = ctx->priv; |
| double frame_timestamp = frame->pts == AV_NOPTS_VALUE ? -1 : frame->pts * av_q2d(inlink->time_base); |
| |
| // Calculate Fade assuming this is a Fade In |
| if (s->fade_state == VF_FADE_WAITING) { |
| s->factor=0; |
| if ((frame_timestamp >= (s->start_time/(double)AV_TIME_BASE)) |
| && (s->frame_index >= s->start_frame)) { |
| // Time to start fading |
| s->fade_state = VF_FADE_FADING; |
| |
| // Save start time in case we are starting based on frames and fading based on time |
| if ((s->start_time == 0) && (s->start_frame != 0)) { |
| s->start_time = frame_timestamp*(double)AV_TIME_BASE; |
| } |
| |
| // Save start frame in case we are starting based on time and fading based on frames |
| if ((s->start_time != 0) && (s->start_frame == 0)) { |
| s->start_frame = s->frame_index; |
| } |
| } |
| } |
| if (s->fade_state == VF_FADE_FADING) { |
| if (s->duration == 0) { |
| // Fading based on frame count |
| s->factor = (s->frame_index - s->start_frame) * s->fade_per_frame; |
| if (s->frame_index > (s->start_frame + s->nb_frames)) { |
| s->fade_state = VF_FADE_DONE; |
| } |
| |
| } else { |
| // Fading based on duration |
| s->factor = (frame_timestamp - (s->start_time/(double)AV_TIME_BASE)) |
| * (float) UINT16_MAX / (s->duration/(double)AV_TIME_BASE); |
| if (frame_timestamp > ((s->start_time/(double)AV_TIME_BASE) |
| + (s->duration/(double)AV_TIME_BASE))) { |
| s->fade_state = VF_FADE_DONE; |
| } |
| } |
| } |
| if (s->fade_state == VF_FADE_DONE) { |
| s->factor=UINT16_MAX; |
| } |
| |
| s->factor = av_clip_uint16(s->factor); |
| |
| // Invert fade_factor if Fading Out |
| if (s->type == 1) { |
| s->factor=UINT16_MAX-s->factor; |
| } |
| |
| if (s->factor < UINT16_MAX) { |
| if (s->alpha) { |
| ctx->internal->execute(ctx, filter_slice_alpha, frame, NULL, |
| FFMIN(frame->height, ctx->graph->nb_threads)); |
| } else { |
| /* luma or rgb plane */ |
| ctx->internal->execute(ctx, filter_slice_luma, frame, NULL, |
| FFMIN(frame->height, ctx->graph->nb_threads)); |
| |
| if (frame->data[1] && frame->data[2]) { |
| /* chroma planes */ |
| ctx->internal->execute(ctx, filter_slice_chroma, frame, NULL, |
| FFMIN(frame->height, ctx->graph->nb_threads)); |
| } |
| } |
| } |
| |
| s->frame_index++; |
| |
| return ff_filter_frame(inlink->dst->outputs[0], frame); |
| } |
| |
| |
| #define OFFSET(x) offsetof(FadeContext, x) |
| #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM |
| |
| static const AVOption fade_options[] = { |
| { "type", "'in' or 'out' for fade-in/fade-out", OFFSET(type), AV_OPT_TYPE_INT, { .i64 = FADE_IN }, FADE_IN, FADE_OUT, FLAGS, "type" }, |
| { "t", "'in' or 'out' for fade-in/fade-out", OFFSET(type), AV_OPT_TYPE_INT, { .i64 = FADE_IN }, FADE_IN, FADE_OUT, FLAGS, "type" }, |
| { "in", "fade-in", 0, AV_OPT_TYPE_CONST, { .i64 = FADE_IN }, .unit = "type" }, |
| { "out", "fade-out", 0, AV_OPT_TYPE_CONST, { .i64 = FADE_OUT }, .unit = "type" }, |
| { "start_frame", "Number of the first frame to which to apply the effect.", |
| OFFSET(start_frame), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS }, |
| { "s", "Number of the first frame to which to apply the effect.", |
| OFFSET(start_frame), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS }, |
| { "nb_frames", "Number of frames to which the effect should be applied.", |
| OFFSET(nb_frames), AV_OPT_TYPE_INT, { .i64 = 25 }, 0, INT_MAX, FLAGS }, |
| { "n", "Number of frames to which the effect should be applied.", |
| OFFSET(nb_frames), AV_OPT_TYPE_INT, { .i64 = 25 }, 0, INT_MAX, FLAGS }, |
| { "alpha", "fade alpha if it is available on the input", OFFSET(alpha), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 1, FLAGS }, |
| { "start_time", "Number of seconds of the beginning of the effect.", |
| OFFSET(start_time), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT32_MAX, FLAGS }, |
| { "st", "Number of seconds of the beginning of the effect.", |
| OFFSET(start_time), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT32_MAX, FLAGS }, |
| { "duration", "Duration of the effect in seconds.", |
| OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT32_MAX, FLAGS }, |
| { "d", "Duration of the effect in seconds.", |
| OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT32_MAX, FLAGS }, |
| { NULL } |
| }; |
| |
| AVFILTER_DEFINE_CLASS(fade); |
| |
| static const AVFilterPad avfilter_vf_fade_inputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .config_props = config_props, |
| .filter_frame = filter_frame, |
| .needs_writable = 1, |
| }, |
| { NULL } |
| }; |
| |
| static const AVFilterPad avfilter_vf_fade_outputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| }, |
| { NULL } |
| }; |
| |
| AVFilter avfilter_vf_fade = { |
| .name = "fade", |
| .description = NULL_IF_CONFIG_SMALL("Fade in/out input video."), |
| .init = init, |
| .priv_size = sizeof(FadeContext), |
| .priv_class = &fade_class, |
| .query_formats = query_formats, |
| .inputs = avfilter_vf_fade_inputs, |
| .outputs = avfilter_vf_fade_outputs, |
| .flags = AVFILTER_FLAG_SLICE_THREADS, |
| }; |