2 * Copyright (c) 2010 Brandon Mintern
3 * Copyright (c) 2007 Bobby Bingham
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 * based heavily on vf_negate.c by Bobby Bingham
28 #include "libavutil/avstring.h"
29 #include "libavutil/common.h"
30 #include "libavutil/eval.h"
31 #include "libavutil/opt.h"
32 #include "libavutil/pixdesc.h"
34 #include "drawutils.h"
55 int factor, fade_per_frame;
56 int start_frame, nb_frames;
57 unsigned int frame_index;
59 unsigned int black_level, black_level_scaled;
60 uint8_t is_packed_rgb;
63 uint64_t start_time, duration;
64 enum {VF_FADE_WAITING=0, VF_FADE_FADING, VF_FADE_DONE} fade_state;
67 static av_cold int init(AVFilterContext *ctx)
69 FadeContext *s = ctx->priv;
71 s->fade_per_frame = (1 << 16) / s->nb_frames;
72 s->fade_state = VF_FADE_WAITING;
74 if (s->duration != 0) {
75 // If duration (seconds) is non-zero, assume that we are not fading based on frames
76 s->nb_frames = 0; // Mostly to clean up logging
79 // Choose what to log. If both time-based and frame-based options, both lines will be in the log
80 if (s->start_frame || s->nb_frames) {
81 av_log(ctx, AV_LOG_VERBOSE,
82 "type:%s start_frame:%d nb_frames:%d alpha:%d\n",
83 s->type == FADE_IN ? "in" : "out", s->start_frame,
84 s->nb_frames,s->alpha);
86 if (s->start_time || s->duration) {
87 av_log(ctx, AV_LOG_VERBOSE,
88 "type:%s start_time:%f duration:%f alpha:%d\n",
89 s->type == FADE_IN ? "in" : "out", (s->start_time / (double)AV_TIME_BASE),
90 (s->duration / (double)AV_TIME_BASE),s->alpha);
96 static int query_formats(AVFilterContext *ctx)
98 static const enum AVPixelFormat pix_fmts[] = {
99 AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P,
100 AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
101 AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
102 AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUVJ440P,
103 AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
104 AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
105 AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR,
106 AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
110 ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
114 const static enum AVPixelFormat studio_level_pix_fmts[] = {
115 AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P,
116 AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
121 static int config_props(AVFilterLink *inlink)
123 FadeContext *s = inlink->dst->priv;
124 const AVPixFmtDescriptor *pixdesc = av_pix_fmt_desc_get(inlink->format);
126 s->hsub = pixdesc->log2_chroma_w;
127 s->vsub = pixdesc->log2_chroma_h;
129 s->bpp = av_get_bits_per_pixel(pixdesc) >> 3;
130 s->alpha &= !!(pixdesc->flags & AV_PIX_FMT_FLAG_ALPHA);
131 s->is_packed_rgb = ff_fill_rgba_map(s->rgba_map, inlink->format) >= 0;
133 /* use CCIR601/709 black level for studio-level pixel non-alpha components */
135 ff_fmt_is_in(inlink->format, studio_level_pix_fmts) && !s->alpha ? 16 : 0;
136 /* 32768 = 1 << 15, it is an integer representation
137 * of 0.5 and is for rounding. */
138 s->black_level_scaled = (s->black_level << 16) + 32768;
142 static int filter_slice_luma(AVFilterContext *ctx, void *arg, int jobnr,
145 FadeContext *s = ctx->priv;
146 AVFrame *frame = arg;
147 int slice_start = (frame->height * jobnr ) / nb_jobs;
148 int slice_end = (frame->height * (jobnr+1)) / nb_jobs;
151 for (i = slice_start; i < slice_end; i++) {
152 uint8_t *p = frame->data[0] + i * frame->linesize[0];
153 for (j = 0; j < frame->width * s->bpp; j++) {
154 /* s->factor is using 16 lower-order bits for decimal
155 * places. 32768 = 1 << 15, it is an integer representation
156 * of 0.5 and is for rounding. */
157 *p = ((*p - s->black_level) * s->factor + s->black_level_scaled) >> 16;
165 static int filter_slice_chroma(AVFilterContext *ctx, void *arg, int jobnr,
168 FadeContext *s = ctx->priv;
169 AVFrame *frame = arg;
171 const int width = FF_CEIL_RSHIFT(frame->width, s->hsub);
172 const int height= FF_CEIL_RSHIFT(frame->height, s->vsub);
173 int slice_start = (height * jobnr ) / nb_jobs;
174 int slice_end = (height * (jobnr+1)) / nb_jobs;
176 for (plane = 1; plane < 3; plane++) {
177 for (i = slice_start; i < slice_end; i++) {
178 uint8_t *p = frame->data[plane] + i * frame->linesize[plane];
179 for (j = 0; j < width; j++) {
180 /* 8421367 = ((128 << 1) + 1) << 15. It is an integer
181 * representation of 128.5. The .5 is for rounding
183 *p = ((*p - 128) * s->factor + 8421367) >> 16;
192 static int filter_slice_alpha(AVFilterContext *ctx, void *arg, int jobnr,
195 FadeContext *s = ctx->priv;
196 AVFrame *frame = arg;
197 int plane = s->is_packed_rgb ? 0 : A;
198 int slice_start = (frame->height * jobnr ) / nb_jobs;
199 int slice_end = (frame->height * (jobnr+1)) / nb_jobs;
202 for (i = slice_start; i < slice_end; i++) {
203 uint8_t *p = frame->data[plane] + i * frame->linesize[plane] + s->is_packed_rgb*s->rgba_map[A];
204 int step = s->is_packed_rgb ? 4 : 1;
205 for (j = 0; j < frame->width; j++) {
206 /* s->factor is using 16 lower-order bits for decimal
207 * places. 32768 = 1 << 15, it is an integer representation
208 * of 0.5 and is for rounding. */
209 *p = ((*p - s->black_level) * s->factor + s->black_level_scaled) >> 16;
217 static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
219 AVFilterContext *ctx = inlink->dst;
220 FadeContext *s = ctx->priv;
221 double frame_timestamp = frame->pts == AV_NOPTS_VALUE ? -1 : frame->pts * av_q2d(inlink->time_base);
223 // Calculate Fade assuming this is a Fade In
224 if (s->fade_state == VF_FADE_WAITING) {
226 if ((frame_timestamp >= (s->start_time/(double)AV_TIME_BASE))
227 && (s->frame_index >= s->start_frame)) {
228 // Time to start fading
229 s->fade_state = VF_FADE_FADING;
231 // Save start time in case we are starting based on frames and fading based on time
232 if ((s->start_time == 0) && (s->start_frame != 0)) {
233 s->start_time = frame_timestamp*(double)AV_TIME_BASE;
236 // Save start frame in case we are starting based on time and fading based on frames
237 if ((s->start_time != 0) && (s->start_frame == 0)) {
238 s->start_frame = s->frame_index;
242 if (s->fade_state == VF_FADE_FADING) {
243 if (s->duration == 0) {
244 // Fading based on frame count
245 s->factor = (s->frame_index - s->start_frame) * s->fade_per_frame;
246 if (s->frame_index > (s->start_frame + s->nb_frames)) {
247 s->fade_state = VF_FADE_DONE;
251 // Fading based on duration
252 s->factor = (frame_timestamp - (s->start_time/(double)AV_TIME_BASE))
253 * (float) UINT16_MAX / (s->duration/(double)AV_TIME_BASE);
254 if (frame_timestamp > ((s->start_time/(double)AV_TIME_BASE)
255 + (s->duration/(double)AV_TIME_BASE))) {
256 s->fade_state = VF_FADE_DONE;
260 if (s->fade_state == VF_FADE_DONE) {
261 s->factor=UINT16_MAX;
264 s->factor = av_clip_uint16(s->factor);
266 // Invert fade_factor if Fading Out
268 s->factor=UINT16_MAX-s->factor;
271 if (s->factor < UINT16_MAX) {
273 ctx->internal->execute(ctx, filter_slice_alpha, frame, NULL,
274 FFMIN(frame->height, ctx->graph->nb_threads));
276 /* luma or rgb plane */
277 ctx->internal->execute(ctx, filter_slice_luma, frame, NULL,
278 FFMIN(frame->height, ctx->graph->nb_threads));
280 if (frame->data[1] && frame->data[2]) {
282 ctx->internal->execute(ctx, filter_slice_chroma, frame, NULL,
283 FFMIN(frame->height, ctx->graph->nb_threads));
290 return ff_filter_frame(inlink->dst->outputs[0], frame);
294 #define OFFSET(x) offsetof(FadeContext, x)
295 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
297 static const AVOption fade_options[] = {
298 { "type", "'in' or 'out' for fade-in/fade-out", OFFSET(type), AV_OPT_TYPE_INT, { .i64 = FADE_IN }, FADE_IN, FADE_OUT, FLAGS, "type" },
299 { "t", "'in' or 'out' for fade-in/fade-out", OFFSET(type), AV_OPT_TYPE_INT, { .i64 = FADE_IN }, FADE_IN, FADE_OUT, FLAGS, "type" },
300 { "in", "fade-in", 0, AV_OPT_TYPE_CONST, { .i64 = FADE_IN }, .unit = "type" },
301 { "out", "fade-out", 0, AV_OPT_TYPE_CONST, { .i64 = FADE_OUT }, .unit = "type" },
302 { "start_frame", "Number of the first frame to which to apply the effect.",
303 OFFSET(start_frame), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
304 { "s", "Number of the first frame to which to apply the effect.",
305 OFFSET(start_frame), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
306 { "nb_frames", "Number of frames to which the effect should be applied.",
307 OFFSET(nb_frames), AV_OPT_TYPE_INT, { .i64 = 25 }, 0, INT_MAX, FLAGS },
308 { "n", "Number of frames to which the effect should be applied.",
309 OFFSET(nb_frames), AV_OPT_TYPE_INT, { .i64 = 25 }, 0, INT_MAX, FLAGS },
310 { "alpha", "fade alpha if it is available on the input", OFFSET(alpha), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 1, FLAGS },
311 { "start_time", "Number of seconds of the beginning of the effect.",
312 OFFSET(start_time), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT32_MAX, FLAGS },
313 { "st", "Number of seconds of the beginning of the effect.",
314 OFFSET(start_time), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT32_MAX, FLAGS },
315 { "duration", "Duration of the effect in seconds.",
316 OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT32_MAX, FLAGS },
317 { "d", "Duration of the effect in seconds.",
318 OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT32_MAX, FLAGS },
322 AVFILTER_DEFINE_CLASS(fade);
324 static const AVFilterPad avfilter_vf_fade_inputs[] = {
327 .type = AVMEDIA_TYPE_VIDEO,
328 .config_props = config_props,
329 .get_video_buffer = ff_null_get_video_buffer,
330 .filter_frame = filter_frame,
336 static const AVFilterPad avfilter_vf_fade_outputs[] = {
339 .type = AVMEDIA_TYPE_VIDEO,
344 AVFilter avfilter_vf_fade = {
346 .description = NULL_IF_CONFIG_SMALL("Fade in/out input video."),
348 .priv_size = sizeof(FadeContext),
349 .priv_class = &fade_class,
350 .query_formats = query_formats,
352 .inputs = avfilter_vf_fade_inputs,
353 .outputs = avfilter_vf_fade_outputs,
354 .flags = AVFILTER_FLAG_SLICE_THREADS,