mirror of https://github.com/FFmpeg/FFmpeg.git
Paul B Mahol
10 years ago
parent
0190c372ef
commit
319440e54f
6 changed files with 308 additions and 1 deletions
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/*
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* Copyright (c) 2015 Paul B. Mahol |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "libavutil/avstring.h" |
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#include "libavutil/imgutils.h" |
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#include "libavutil/opt.h" |
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#include "libavutil/pixdesc.h" |
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#include "avfilter.h" |
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#include "formats.h" |
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#include "internal.h" |
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#include "framesync.h" |
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#include "video.h" |
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typedef struct StackContext { |
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const AVClass *class; |
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const AVPixFmtDescriptor *desc; |
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int nb_inputs; |
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int is_vertical; |
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int nb_planes; |
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AVFrame **frames; |
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FFFrameSync fs; |
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} StackContext; |
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static int query_formats(AVFilterContext *ctx) |
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{ |
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AVFilterFormats *pix_fmts = NULL; |
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int fmt; |
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for (fmt = 0; av_pix_fmt_desc_get(fmt); fmt++) { |
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt); |
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if (!(desc->flags & AV_PIX_FMT_FLAG_PAL || |
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desc->flags & AV_PIX_FMT_FLAG_HWACCEL || |
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desc->flags & AV_PIX_FMT_FLAG_BITSTREAM)) |
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ff_add_format(&pix_fmts, fmt); |
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} |
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return ff_set_common_formats(ctx, pix_fmts); |
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} |
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static int filter_frame(AVFilterLink *inlink, AVFrame *in) |
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{ |
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StackContext *s = inlink->dst->priv; |
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return ff_framesync_filter_frame(&s->fs, inlink, in); |
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} |
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static av_cold int init(AVFilterContext *ctx) |
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{ |
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StackContext *s = ctx->priv; |
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int i, ret; |
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if (!strcmp(ctx->filter->name, "vstack")) |
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s->is_vertical = 1; |
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s->frames = av_calloc(s->nb_inputs, sizeof(*s->frames)); |
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if (!s->frames) |
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return AVERROR(ENOMEM); |
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for (i = 0; i < s->nb_inputs; i++) { |
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AVFilterPad pad = { 0 }; |
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pad.type = AVMEDIA_TYPE_VIDEO; |
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pad.name = av_asprintf("input%d", i); |
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if (!pad.name) |
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return AVERROR(ENOMEM); |
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pad.filter_frame = filter_frame; |
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if ((ret = ff_insert_inpad(ctx, i, &pad)) < 0) { |
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av_freep(&pad.name); |
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return ret; |
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} |
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} |
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return 0; |
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} |
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static int process_frame(FFFrameSync *fs) |
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{ |
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AVFilterContext *ctx = fs->parent; |
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AVFilterLink *outlink = ctx->outputs[0]; |
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StackContext *s = fs->opaque; |
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AVFrame **in = s->frames; |
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AVFrame *out; |
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int i, p, ret, offset[4] = { 0 }; |
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for (i = 0; i < s->nb_inputs; i++) { |
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if ((ret = ff_framesync_get_frame(&s->fs, i, &in[i], 0)) < 0) |
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return ret; |
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} |
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out = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
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if (!out) |
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return AVERROR(ENOMEM); |
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out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base); |
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for (i = 0; i < s->nb_inputs; i++) { |
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AVFilterLink *inlink = ctx->inputs[i]; |
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int linesize[4]; |
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int height[4]; |
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if ((ret = av_image_fill_linesizes(linesize, inlink->format, inlink->w)) < 0) |
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return ret; |
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height[1] = height[2] = FF_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h); |
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height[0] = height[3] = inlink->h; |
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for (p = 0; p < s->nb_planes; p++) { |
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if (s->is_vertical) { |
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av_image_copy_plane(out->data[p] + offset[p] * out->linesize[p], |
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out->linesize[p], |
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in[i]->data[p], |
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in[i]->linesize[p], |
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linesize[p], height[p]); |
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offset[p] += height[p]; |
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} else { |
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av_image_copy_plane(out->data[p] + offset[p], |
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out->linesize[p], |
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in[i]->data[p], |
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in[i]->linesize[p], |
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linesize[p], height[p]); |
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offset[p] += linesize[p]; |
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} |
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} |
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} |
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return ff_filter_frame(outlink, out); |
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} |
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static int config_output(AVFilterLink *outlink) |
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{ |
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AVFilterContext *ctx = outlink->src; |
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StackContext *s = ctx->priv; |
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AVRational time_base = ctx->inputs[0]->time_base; |
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AVRational frame_rate = ctx->inputs[0]->frame_rate; |
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int height = ctx->inputs[0]->h; |
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int width = ctx->inputs[0]->w; |
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FFFrameSyncIn *in; |
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int i, ret; |
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if (s->is_vertical) { |
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for (i = 1; i < s->nb_inputs; i++) { |
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if (ctx->inputs[i]->w != width) { |
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av_log(ctx, AV_LOG_ERROR, "Input %d width %d does not match input %d width %d.\n", i, ctx->inputs[i]->w, 0, width); |
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return AVERROR(EINVAL); |
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} |
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height += ctx->inputs[i]->h; |
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} |
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} else { |
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for (i = 1; i < s->nb_inputs; i++) { |
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if (ctx->inputs[i]->h != height) { |
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av_log(ctx, AV_LOG_ERROR, "Input %d height %d does not match input %d height %d.\n", i, ctx->inputs[i]->h, 0, height); |
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return AVERROR(EINVAL); |
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} |
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width += ctx->inputs[i]->w; |
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} |
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} |
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s->desc = av_pix_fmt_desc_get(outlink->format); |
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if (!s->desc) |
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return AVERROR_BUG; |
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s->nb_planes = av_pix_fmt_count_planes(outlink->format); |
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outlink->w = width; |
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outlink->h = height; |
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outlink->time_base = time_base; |
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outlink->frame_rate = frame_rate; |
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if ((ret = ff_framesync_init(&s->fs, ctx, s->nb_inputs)) < 0) |
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return ret; |
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in = s->fs.in; |
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s->fs.opaque = s; |
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s->fs.on_event = process_frame; |
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for (i = 0; i < s->nb_inputs; i++) { |
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AVFilterLink *inlink = ctx->inputs[i]; |
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in[i].time_base = inlink->time_base; |
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in[i].sync = 1; |
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in[i].before = EXT_STOP; |
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in[i].after = EXT_INFINITY; |
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} |
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return ff_framesync_configure(&s->fs); |
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} |
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static int request_frame(AVFilterLink *outlink) |
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{ |
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StackContext *s = outlink->src->priv; |
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return ff_framesync_request_frame(&s->fs, outlink); |
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} |
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static av_cold void uninit(AVFilterContext *ctx) |
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{ |
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StackContext *s = ctx->priv; |
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ff_framesync_uninit(&s->fs); |
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av_freep(&s->frames); |
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} |
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#define OFFSET(x) offsetof(StackContext, x) |
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#define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM |
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static const AVOption stack_options[] = { |
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{ "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT_MAX, .flags = FLAGS }, |
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{ NULL }, |
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}; |
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static const AVFilterPad outputs[] = { |
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{ |
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.name = "default", |
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.type = AVMEDIA_TYPE_VIDEO, |
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.config_props = config_output, |
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.request_frame = request_frame, |
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}, |
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{ NULL } |
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}; |
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#if CONFIG_HSTACK_FILTER |
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#define hstack_options stack_options |
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AVFILTER_DEFINE_CLASS(hstack); |
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AVFilter ff_vf_hstack = { |
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.name = "hstack", |
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.description = NULL_IF_CONFIG_SMALL("Stack video inputs horizontally."), |
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.priv_size = sizeof(StackContext), |
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.priv_class = &hstack_class, |
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.query_formats = query_formats, |
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.outputs = outputs, |
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.init = init, |
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.uninit = uninit, |
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.flags = AVFILTER_FLAG_DYNAMIC_INPUTS, |
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}; |
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#endif /* CONFIG_HSTACK_FILTER */ |
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#if CONFIG_VSTACK_FILTER |
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#define vstack_options stack_options |
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AVFILTER_DEFINE_CLASS(vstack); |
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AVFilter ff_vf_vstack = { |
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.name = "vstack", |
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.description = NULL_IF_CONFIG_SMALL("Stack video inputs vertically."), |
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.priv_size = sizeof(StackContext), |
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.priv_class = &vstack_class, |
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.query_formats = query_formats, |
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.outputs = outputs, |
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.init = init, |
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.uninit = uninit, |
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.flags = AVFILTER_FLAG_DYNAMIC_INPUTS, |
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}; |
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#endif /* CONFIG_VSTACK_FILTER */ |
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