| /* |
| * Copyright (c) 2017 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 "config_components.h" |
| |
| #include "libavutil/avstring.h" |
| #include "libavutil/imgutils.h" |
| #include "libavutil/mem.h" |
| #include "libavutil/opt.h" |
| #include "libavutil/pixdesc.h" |
| |
| #include "avfilter.h" |
| #include "formats.h" |
| #include "internal.h" |
| #include "framesync.h" |
| #include "video.h" |
| |
| typedef struct MixContext { |
| const AVClass *class; |
| const AVPixFmtDescriptor *desc; |
| char *weights_str; |
| int nb_inputs; |
| int nb_threads; |
| int duration; |
| float *weights; |
| float scale; |
| float wfactor; |
| |
| int fast; |
| int tmix; |
| int nb_frames; |
| int nb_unique_frames; |
| |
| int depth; |
| int max; |
| int planes; |
| int nb_planes; |
| int linesizes[4]; |
| int height[4]; |
| |
| uint8_t *sum[4]; |
| |
| uint8_t **data; |
| int *linesize; |
| |
| AVFrame **frames; |
| FFFrameSync fs; |
| } MixContext; |
| |
| static int query_formats(AVFilterContext *ctx) |
| { |
| unsigned reject_flags = AV_PIX_FMT_FLAG_BITSTREAM | |
| AV_PIX_FMT_FLAG_HWACCEL | |
| AV_PIX_FMT_FLAG_PAL; |
| unsigned accept_flags = 0; |
| |
| if (!HAVE_BIGENDIAN) |
| reject_flags |= AV_PIX_FMT_FLAG_BE; |
| else |
| accept_flags |= AV_PIX_FMT_FLAG_BE; |
| |
| return ff_set_common_formats(ctx, ff_formats_pixdesc_filter(accept_flags, reject_flags)); |
| } |
| |
| static int parse_weights(AVFilterContext *ctx) |
| { |
| MixContext *s = ctx->priv; |
| char *p, *arg, *saveptr = NULL; |
| int i, last = 0; |
| |
| s->fast = 1; |
| s->wfactor = 0.f; |
| p = s->weights_str; |
| for (i = 0; i < s->nb_inputs; i++) { |
| if (!(arg = av_strtok(p, " |", &saveptr))) |
| break; |
| |
| p = NULL; |
| if (av_sscanf(arg, "%f", &s->weights[i]) != 1) { |
| av_log(ctx, AV_LOG_ERROR, "Invalid syntax for weights[%d].\n", i); |
| return AVERROR(EINVAL); |
| } |
| s->wfactor += s->weights[i]; |
| if (i > 0) |
| s->fast &= s->weights[i] == s->weights[0]; |
| last = i; |
| } |
| |
| for (; i < s->nb_inputs; i++) { |
| s->weights[i] = s->weights[last]; |
| s->wfactor += s->weights[i]; |
| } |
| if (s->scale == 0) { |
| s->wfactor = 1 / s->wfactor; |
| } else { |
| if (s->scale != 1.f / s->wfactor) |
| s->fast = 0; |
| s->wfactor = s->scale; |
| } |
| |
| return 0; |
| } |
| |
| static av_cold int init(AVFilterContext *ctx) |
| { |
| MixContext *s = ctx->priv; |
| int ret; |
| |
| s->tmix = !strcmp(ctx->filter->name, "tmix"); |
| |
| s->frames = av_calloc(s->nb_inputs, sizeof(*s->frames)); |
| if (!s->frames) |
| return AVERROR(ENOMEM); |
| |
| s->weights = av_calloc(s->nb_inputs, sizeof(*s->weights)); |
| if (!s->weights) |
| return AVERROR(ENOMEM); |
| |
| if (!s->tmix) { |
| for (int i = 0; i < s->nb_inputs; i++) { |
| AVFilterPad pad = { 0 }; |
| |
| pad.type = AVMEDIA_TYPE_VIDEO; |
| pad.name = av_asprintf("input%d", i); |
| if (!pad.name) |
| return AVERROR(ENOMEM); |
| |
| if ((ret = ff_append_inpad_free_name(ctx, &pad)) < 0) |
| return ret; |
| } |
| } |
| |
| return parse_weights(ctx); |
| } |
| |
| typedef struct ThreadData { |
| AVFrame **in, *out; |
| } ThreadData; |
| |
| #define FAST_TMIX_SLICE(type, stype, round) \ |
| for (int p = 0; p < s->nb_planes; p++) { \ |
| const int slice_start = (s->height[p] * jobnr) / nb_jobs; \ |
| const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs; \ |
| const int width = s->linesizes[p] / sizeof(type); \ |
| stype *sum = (stype *)(s->sum[p] + slice_start * s->linesizes[p] * 2); \ |
| type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]); \ |
| const ptrdiff_t sum_linesize = (s->linesizes[p] * 2) / sizeof(stype); \ |
| const ptrdiff_t dst_linesize = out->linesize[p] / sizeof(type); \ |
| const int idx = FFMAX(0, nb_inputs - nb_unique); \ |
| const ptrdiff_t src_linesize[2] = { in[idx]->linesize[p], \ |
| in[nb_inputs-1]->linesize[p] }; \ |
| const type *src[2]; \ |
| \ |
| if (!((1 << p) & s->planes)) { \ |
| av_image_copy_plane((uint8_t *)dst, out->linesize[p], \ |
| in[0]->data[p] + slice_start * in[0]->linesize[p], \ |
| in[0]->linesize[p], \ |
| s->linesizes[p], slice_end - slice_start); \ |
| continue; \ |
| } \ |
| \ |
| src[0] = (const type *)(in[idx]->data[p] + slice_start*src_linesize[0]); \ |
| src[1] = (const type *)(in[nb_inputs-1]->data[p] + slice_start * src_linesize[1]); \ |
| \ |
| for (int y = slice_start; y < slice_end; y++) { \ |
| for (int x = 0; x < width; x++) { \ |
| sum[x] += src[1][x] * (1 + (nb_inputs - 1) * (idx == (nb_inputs - 1))); \ |
| dst[x] = (sum[x] + (round)) / nb_inputs; \ |
| sum[x] -= src[0][x]; \ |
| } \ |
| \ |
| dst += dst_linesize; \ |
| sum += sum_linesize; \ |
| src[0] += src_linesize[0] / sizeof(type); \ |
| src[1] += src_linesize[1] / sizeof(type); \ |
| } \ |
| } |
| |
| #define MIX_SLICE(type, fun, clip) \ |
| for (int p = 0; p < s->nb_planes; p++) { \ |
| const int slice_start = (s->height[p] * jobnr) / nb_jobs; \ |
| const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs; \ |
| const int width = s->linesizes[p] / sizeof(type); \ |
| type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]); \ |
| const ptrdiff_t dst_linesize = out->linesize[p] / sizeof(type); \ |
| \ |
| if (!((1 << p) & s->planes)) { \ |
| av_image_copy_plane((uint8_t *)dst, out->linesize[p], \ |
| in[0]->data[p] + slice_start * in[0]->linesize[p], \ |
| in[0]->linesize[p], \ |
| s->linesizes[p], slice_end - slice_start); \ |
| continue; \ |
| } \ |
| \ |
| for (int i = 0; i < nb_inputs; i++) \ |
| linesize[i] = in[i]->linesize[p]; \ |
| \ |
| for (int i = 0; i < nb_inputs; i++) \ |
| srcf[i] = in[i]->data[p] + slice_start * linesize[i]; \ |
| \ |
| for (int y = slice_start; y < slice_end; y++) { \ |
| for (int x = 0; x < width; x++) { \ |
| float val = 0.f; \ |
| \ |
| for (int i = 0; i < nb_inputs; i++) { \ |
| float src = *(type *)(srcf[i] + x * sizeof(type)); \ |
| \ |
| val += src * weights[i]; \ |
| } \ |
| \ |
| dst[x] = clip(fun(val * wfactor), 0, max); \ |
| } \ |
| \ |
| dst += dst_linesize; \ |
| for (int i = 0; i < nb_inputs; i++) \ |
| srcf[i] += linesize[i]; \ |
| } \ |
| } |
| |
| #define CLIP8(x, min, max) av_clip_uint8(x) |
| #define CLIP16(x, min, max) av_clip(x, min, max) |
| #define CLIPF(x, min, max) (x) |
| #define NOP(x) (x) |
| |
| static int mix_frames(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) |
| { |
| MixContext *s = ctx->priv; |
| ThreadData *td = arg; |
| AVFrame **in = td->in; |
| AVFrame *out = td->out; |
| const float *weights = s->weights; |
| uint8_t **srcf = s->data + jobnr * s->nb_inputs; |
| int *linesize = s->linesize + jobnr * s->nb_inputs; |
| const int nb_unique = s->nb_unique_frames; |
| const int nb_inputs = s->nb_inputs; |
| const float wfactor = s->wfactor; |
| const int max = s->max; |
| |
| if (s->tmix && s->fast) { |
| if (s->depth <= 8) { |
| FAST_TMIX_SLICE(uint8_t, uint16_t, nb_inputs >> 1) |
| } else if (s->depth <= 16) { |
| FAST_TMIX_SLICE(uint16_t, uint32_t, nb_inputs >> 1) |
| } else { |
| FAST_TMIX_SLICE(float, float, 0.f) |
| } |
| |
| return 0; |
| } |
| |
| if (s->depth <= 8) { |
| MIX_SLICE(uint8_t, lrintf, CLIP8) |
| } else if (s->depth <= 16) { |
| MIX_SLICE(uint16_t, lrintf, CLIP16) |
| } else { |
| MIX_SLICE(float, NOP, CLIPF) |
| } |
| |
| return 0; |
| } |
| |
| static int process_frame(FFFrameSync *fs) |
| { |
| AVFilterContext *ctx = fs->parent; |
| AVFilterLink *outlink = ctx->outputs[0]; |
| MixContext *s = fs->opaque; |
| AVFrame **in = s->frames; |
| AVFrame *out; |
| ThreadData td; |
| int i, ret; |
| |
| for (i = 0; i < s->nb_inputs; i++) { |
| if ((ret = ff_framesync_get_frame(&s->fs, i, &in[i], 0)) < 0) |
| return ret; |
| } |
| |
| if (ctx->is_disabled) { |
| out = av_frame_clone(s->frames[0]); |
| if (!out) |
| return AVERROR(ENOMEM); |
| out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base); |
| return ff_filter_frame(outlink, out); |
| } |
| |
| out = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
| if (!out) |
| return AVERROR(ENOMEM); |
| out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base); |
| |
| td.in = in; |
| td.out = out; |
| ff_filter_execute(ctx, mix_frames, &td, NULL, |
| FFMIN(s->height[1], s->nb_threads)); |
| |
| return ff_filter_frame(outlink, out); |
| } |
| |
| static int config_output(AVFilterLink *outlink) |
| { |
| AVFilterContext *ctx = outlink->src; |
| MixContext *s = ctx->priv; |
| AVRational frame_rate = ctx->inputs[0]->frame_rate; |
| AVRational sar = ctx->inputs[0]->sample_aspect_ratio; |
| AVFilterLink *inlink = ctx->inputs[0]; |
| int height = ctx->inputs[0]->h; |
| int width = ctx->inputs[0]->w; |
| FFFrameSyncIn *in; |
| int i, ret; |
| |
| if (!s->tmix) { |
| for (i = 1; i < s->nb_inputs; i++) { |
| if (ctx->inputs[i]->h != height || ctx->inputs[i]->w != width) { |
| av_log(ctx, AV_LOG_ERROR, "Input %d size (%dx%d) does not match input %d size (%dx%d).\n", i, ctx->inputs[i]->w, ctx->inputs[i]->h, 0, width, height); |
| return AVERROR(EINVAL); |
| } |
| } |
| } |
| |
| s->nb_threads = ff_filter_get_nb_threads(ctx); |
| s->desc = av_pix_fmt_desc_get(outlink->format); |
| if (!s->desc) |
| return AVERROR_BUG; |
| s->nb_planes = av_pix_fmt_count_planes(outlink->format); |
| s->depth = s->desc->comp[0].depth; |
| s->max = (1 << s->depth) - 1; |
| |
| if ((ret = av_image_fill_linesizes(s->linesizes, inlink->format, inlink->w)) < 0) |
| return ret; |
| |
| s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h); |
| s->height[0] = s->height[3] = inlink->h; |
| |
| s->data = av_calloc(s->nb_threads * s->nb_inputs, sizeof(*s->data)); |
| if (!s->data) |
| return AVERROR(ENOMEM); |
| |
| s->linesize = av_calloc(s->nb_threads * s->nb_inputs, sizeof(*s->linesize)); |
| if (!s->linesize) |
| return AVERROR(ENOMEM); |
| |
| if (s->tmix) { |
| for (int p = 0; p < s->nb_planes; p++) { |
| s->sum[p] = av_calloc(s->linesizes[p], s->height[p] * sizeof(*s->sum) * 2); |
| if (!s->sum[p]) |
| return AVERROR(ENOMEM); |
| } |
| return 0; |
| } |
| |
| outlink->w = width; |
| outlink->h = height; |
| outlink->frame_rate = frame_rate; |
| outlink->sample_aspect_ratio = sar; |
| |
| if ((ret = ff_framesync_init(&s->fs, ctx, s->nb_inputs)) < 0) |
| return ret; |
| |
| in = s->fs.in; |
| s->fs.opaque = s; |
| s->fs.on_event = process_frame; |
| |
| for (i = 0; i < s->nb_inputs; i++) { |
| AVFilterLink *inlink = ctx->inputs[i]; |
| |
| in[i].time_base = inlink->time_base; |
| in[i].sync = 1; |
| in[i].before = EXT_STOP; |
| in[i].after = (s->duration == 1 || (s->duration == 2 && i == 0)) ? EXT_STOP : EXT_INFINITY; |
| } |
| |
| ret = ff_framesync_configure(&s->fs); |
| outlink->time_base = s->fs.time_base; |
| |
| return ret; |
| } |
| |
| static av_cold void uninit(AVFilterContext *ctx) |
| { |
| MixContext *s = ctx->priv; |
| int i; |
| |
| ff_framesync_uninit(&s->fs); |
| av_freep(&s->weights); |
| av_freep(&s->data); |
| av_freep(&s->linesize); |
| |
| if (s->tmix) { |
| for (i = 0; i < 4; i++) |
| av_freep(&s->sum[i]); |
| for (i = 0; i < s->nb_frames && s->frames; i++) |
| av_frame_free(&s->frames[i]); |
| } |
| av_freep(&s->frames); |
| } |
| |
| static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, |
| char *res, int res_len, int flags) |
| { |
| int ret; |
| |
| ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags); |
| if (ret < 0) |
| return ret; |
| |
| return parse_weights(ctx); |
| } |
| |
| static int activate(AVFilterContext *ctx) |
| { |
| MixContext *s = ctx->priv; |
| return ff_framesync_activate(&s->fs); |
| } |
| |
| #define OFFSET(x) offsetof(MixContext, 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 mix_options[] = { |
| { "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT16_MAX, .flags = FLAGS }, |
| { "weights", "set weight for each input", OFFSET(weights_str), AV_OPT_TYPE_STRING, {.str="1 1"}, 0, 0, .flags = TFLAGS }, |
| { "scale", "set scale", OFFSET(scale), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, INT16_MAX, .flags = TFLAGS }, |
| { "planes", "set what planes to filter", OFFSET(planes), AV_OPT_TYPE_FLAGS, {.i64=15}, 0, 15, .flags = TFLAGS }, |
| { "duration", "how to determine end of stream", OFFSET(duration), AV_OPT_TYPE_INT, {.i64=0}, 0, 2, .flags = FLAGS, .unit = "duration" }, |
| { "longest", "Duration of longest input", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, .unit = "duration" }, |
| { "shortest", "Duration of shortest input", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, .unit = "duration" }, |
| { "first", "Duration of first input", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, .unit = "duration" }, |
| { NULL }, |
| }; |
| |
| static const AVFilterPad outputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .config_props = config_output, |
| }, |
| }; |
| |
| #if CONFIG_MIX_FILTER |
| AVFILTER_DEFINE_CLASS(mix); |
| |
| const AVFilter ff_vf_mix = { |
| .name = "mix", |
| .description = NULL_IF_CONFIG_SMALL("Mix video inputs."), |
| .priv_size = sizeof(MixContext), |
| .priv_class = &mix_class, |
| FILTER_OUTPUTS(outputs), |
| FILTER_QUERY_FUNC(query_formats), |
| .init = init, |
| .uninit = uninit, |
| .activate = activate, |
| .flags = AVFILTER_FLAG_DYNAMIC_INPUTS | AVFILTER_FLAG_SLICE_THREADS | |
| AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL, |
| .process_command = process_command, |
| }; |
| |
| #endif /* CONFIG_MIX_FILTER */ |
| |
| #if CONFIG_TMIX_FILTER |
| static int tmix_filter_frame(AVFilterLink *inlink, AVFrame *in) |
| { |
| AVFilterContext *ctx = inlink->dst; |
| AVFilterLink *outlink = ctx->outputs[0]; |
| MixContext *s = ctx->priv; |
| ThreadData td; |
| AVFrame *out; |
| |
| if (s->nb_inputs == 1) |
| return ff_filter_frame(outlink, in); |
| |
| if (s->nb_frames < s->nb_inputs) { |
| s->frames[s->nb_frames] = in; |
| s->nb_frames++; |
| s->nb_unique_frames++; |
| while (s->nb_frames < s->nb_inputs) { |
| s->frames[s->nb_frames] = av_frame_clone(s->frames[s->nb_frames - 1]); |
| if (!s->frames[s->nb_frames]) |
| return AVERROR(ENOMEM); |
| s->nb_frames++; |
| } |
| } else { |
| s->nb_unique_frames = FFMIN(s->nb_unique_frames + 1, s->nb_inputs); |
| av_frame_free(&s->frames[0]); |
| memmove(&s->frames[0], &s->frames[1], sizeof(*s->frames) * (s->nb_inputs - 1)); |
| s->frames[s->nb_inputs - 1] = in; |
| } |
| |
| if (ctx->is_disabled) { |
| out = av_frame_clone(s->frames[0]); |
| if (!out) |
| return AVERROR(ENOMEM); |
| return ff_filter_frame(outlink, out); |
| } |
| |
| out = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
| if (!out) |
| return AVERROR(ENOMEM); |
| out->pts = s->frames[s->nb_frames - 1]->pts; |
| |
| td.out = out; |
| td.in = s->frames; |
| ff_filter_execute(ctx, mix_frames, &td, NULL, |
| FFMIN(s->height[1], s->nb_threads)); |
| |
| return ff_filter_frame(outlink, out); |
| } |
| |
| static const AVOption tmix_options[] = { |
| { "frames", "set number of successive frames to mix", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=3}, 1, 1024, .flags = FLAGS }, |
| { "weights", "set weight for each frame", OFFSET(weights_str), AV_OPT_TYPE_STRING, {.str="1 1 1"}, 0, 0, .flags = TFLAGS }, |
| { "scale", "set scale", OFFSET(scale), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, INT16_MAX, .flags = TFLAGS }, |
| { "planes", "set what planes to filter", OFFSET(planes), AV_OPT_TYPE_FLAGS, {.i64=15}, 0, 15, .flags = TFLAGS }, |
| { NULL }, |
| }; |
| |
| static const AVFilterPad inputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .filter_frame = tmix_filter_frame, |
| }, |
| }; |
| |
| AVFILTER_DEFINE_CLASS(tmix); |
| |
| const AVFilter ff_vf_tmix = { |
| .name = "tmix", |
| .description = NULL_IF_CONFIG_SMALL("Mix successive video frames."), |
| .priv_size = sizeof(MixContext), |
| .priv_class = &tmix_class, |
| FILTER_OUTPUTS(outputs), |
| FILTER_INPUTS(inputs), |
| FILTER_QUERY_FUNC(query_formats), |
| .init = init, |
| .uninit = uninit, |
| .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS, |
| .process_command = process_command, |
| }; |
| |
| #endif /* CONFIG_TMIX_FILTER */ |