411 lines
14 KiB
C
411 lines
14 KiB
C
/*
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* Copyright (c) 2013 Vittorio Giovara
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*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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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/**
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* @file
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* Generate a frame packed video, by combining two views in a single surface.
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*/
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#include <string.h>
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#include "libavutil/common.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 "libavutil/rational.h"
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#include "libavutil/stereo3d.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 "video.h"
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#define LEFT 0
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#define RIGHT 1
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typedef struct FramepackContext {
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const AVClass *class;
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const AVPixFmtDescriptor *pix_desc; ///< agreed pixel format
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enum AVStereo3DType format; ///< frame pack type output
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AVFrame *input_views[2]; ///< input frames
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int64_t double_pts; ///< new pts for frameseq mode
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} FramepackContext;
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static const enum AVPixelFormat formats_supported[] = {
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AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P,
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AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVJ420P,
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AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
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AV_PIX_FMT_NONE
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};
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static int query_formats(AVFilterContext *ctx)
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{
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// this will ensure that formats are the same on all pads
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ff_set_common_formats(ctx, ff_make_format_list(formats_supported));
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return 0;
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}
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static av_cold void framepack_uninit(AVFilterContext *ctx)
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{
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FramepackContext *s = ctx->priv;
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// clean any leftover frame
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av_frame_free(&s->input_views[LEFT]);
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av_frame_free(&s->input_views[RIGHT]);
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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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FramepackContext *s = outlink->src->priv;
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int width = ctx->inputs[LEFT]->w;
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int height = ctx->inputs[LEFT]->h;
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AVRational time_base = ctx->inputs[LEFT]->time_base;
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AVRational frame_rate = ctx->inputs[LEFT]->frame_rate;
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// check size and fps match on the other input
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if (width != ctx->inputs[RIGHT]->w ||
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height != ctx->inputs[RIGHT]->h) {
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av_log(ctx, AV_LOG_ERROR,
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"Left and right sizes differ (%dx%d vs %dx%d).\n",
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width, height,
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ctx->inputs[RIGHT]->w, ctx->inputs[RIGHT]->h);
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return AVERROR_INVALIDDATA;
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} else if (av_cmp_q(time_base, ctx->inputs[RIGHT]->time_base) != 0) {
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av_log(ctx, AV_LOG_ERROR,
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"Left and right time bases differ (%d/%d vs %d/%d).\n",
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time_base.num, time_base.den,
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ctx->inputs[RIGHT]->time_base.num,
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ctx->inputs[RIGHT]->time_base.den);
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return AVERROR_INVALIDDATA;
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} else if (av_cmp_q(frame_rate, ctx->inputs[RIGHT]->frame_rate) != 0) {
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av_log(ctx, AV_LOG_ERROR,
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"Left and right framerates differ (%d/%d vs %d/%d).\n",
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frame_rate.num, frame_rate.den,
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ctx->inputs[RIGHT]->frame_rate.num,
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ctx->inputs[RIGHT]->frame_rate.den);
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return AVERROR_INVALIDDATA;
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}
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s->pix_desc = av_pix_fmt_desc_get(outlink->format);
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if (!s->pix_desc)
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return AVERROR_BUG;
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// modify output properties as needed
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switch (s->format) {
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case AV_STEREO3D_FRAMESEQUENCE:
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time_base.den *= 2;
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frame_rate.num *= 2;
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s->double_pts = AV_NOPTS_VALUE;
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break;
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case AV_STEREO3D_COLUMNS:
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case AV_STEREO3D_SIDEBYSIDE:
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width *= 2;
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break;
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case AV_STEREO3D_LINES:
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case AV_STEREO3D_TOPBOTTOM:
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height *= 2;
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break;
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default:
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av_log(ctx, AV_LOG_ERROR, "Unknown packing mode.");
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return AVERROR_INVALIDDATA;
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}
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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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return 0;
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}
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static void horizontal_frame_pack(AVFilterLink *outlink,
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AVFrame *out,
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int interleaved)
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{
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AVFilterContext *ctx = outlink->src;
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FramepackContext *s = ctx->priv;
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int i, plane;
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if (interleaved) {
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const uint8_t *leftp = s->input_views[LEFT]->data[0];
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const uint8_t *rightp = s->input_views[RIGHT]->data[0];
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uint8_t *dstp = out->data[0];
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int length = out->width / 2;
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int lines = out->height;
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for (plane = 0; plane < s->pix_desc->nb_components; plane++) {
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if (plane == 1 || plane == 2) {
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length = AV_CEIL_RSHIFT(out->width / 2, s->pix_desc->log2_chroma_w);
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lines = AV_CEIL_RSHIFT(out->height, s->pix_desc->log2_chroma_h);
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}
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for (i = 0; i < lines; i++) {
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int j;
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leftp = s->input_views[LEFT]->data[plane] +
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s->input_views[LEFT]->linesize[plane] * i;
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rightp = s->input_views[RIGHT]->data[plane] +
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s->input_views[RIGHT]->linesize[plane] * i;
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dstp = out->data[plane] + out->linesize[plane] * i;
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for (j = 0; j < length; j++) {
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// interpolate chroma as necessary
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if ((s->pix_desc->log2_chroma_w ||
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s->pix_desc->log2_chroma_h) &&
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(plane == 1 || plane == 2)) {
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*dstp++ = (*leftp + *rightp) / 2;
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*dstp++ = (*leftp + *rightp) / 2;
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} else {
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*dstp++ = *leftp;
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*dstp++ = *rightp;
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}
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leftp += 1;
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rightp += 1;
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}
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}
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}
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} else {
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for (i = 0; i < 2; i++) {
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const uint8_t *src[4];
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uint8_t *dst[4];
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int sub_w = s->input_views[i]->width >> s->pix_desc->log2_chroma_w;
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src[0] = s->input_views[i]->data[0];
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src[1] = s->input_views[i]->data[1];
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src[2] = s->input_views[i]->data[2];
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dst[0] = out->data[0] + i * s->input_views[i]->width;
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dst[1] = out->data[1] + i * sub_w;
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dst[2] = out->data[2] + i * sub_w;
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av_image_copy(dst, out->linesize, src, s->input_views[i]->linesize,
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s->input_views[i]->format,
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s->input_views[i]->width,
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s->input_views[i]->height);
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}
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}
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}
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static void vertical_frame_pack(AVFilterLink *outlink,
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AVFrame *out,
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int interleaved)
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{
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AVFilterContext *ctx = outlink->src;
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FramepackContext *s = ctx->priv;
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int i;
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for (i = 0; i < 2; i++) {
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const uint8_t *src[4];
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uint8_t *dst[4];
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int linesizes[4];
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int sub_h = s->input_views[i]->height >> s->pix_desc->log2_chroma_h;
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src[0] = s->input_views[i]->data[0];
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src[1] = s->input_views[i]->data[1];
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src[2] = s->input_views[i]->data[2];
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dst[0] = out->data[0] + i * out->linesize[0] *
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(interleaved + s->input_views[i]->height * (1 - interleaved));
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dst[1] = out->data[1] + i * out->linesize[1] *
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(interleaved + sub_h * (1 - interleaved));
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dst[2] = out->data[2] + i * out->linesize[2] *
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(interleaved + sub_h * (1 - interleaved));
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linesizes[0] = out->linesize[0] +
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interleaved * out->linesize[0];
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linesizes[1] = out->linesize[1] +
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interleaved * out->linesize[1];
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linesizes[2] = out->linesize[2] +
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interleaved * out->linesize[2];
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av_image_copy(dst, linesizes, src, s->input_views[i]->linesize,
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s->input_views[i]->format,
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s->input_views[i]->width,
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s->input_views[i]->height);
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}
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}
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static av_always_inline void spatial_frame_pack(AVFilterLink *outlink,
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AVFrame *dst)
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{
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AVFilterContext *ctx = outlink->src;
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FramepackContext *s = ctx->priv;
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switch (s->format) {
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case AV_STEREO3D_SIDEBYSIDE:
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horizontal_frame_pack(outlink, dst, 0);
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break;
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case AV_STEREO3D_COLUMNS:
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horizontal_frame_pack(outlink, dst, 1);
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break;
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case AV_STEREO3D_TOPBOTTOM:
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vertical_frame_pack(outlink, dst, 0);
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break;
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case AV_STEREO3D_LINES:
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vertical_frame_pack(outlink, dst, 1);
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break;
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}
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}
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static int filter_frame_left(AVFilterLink *inlink, AVFrame *frame)
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{
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FramepackContext *s = inlink->dst->priv;
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s->input_views[LEFT] = frame;
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return 0;
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}
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static int filter_frame_right(AVFilterLink *inlink, AVFrame *frame)
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{
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FramepackContext *s = inlink->dst->priv;
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s->input_views[RIGHT] = frame;
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return 0;
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}
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static int request_frame(AVFilterLink *outlink)
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{
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AVFilterContext *ctx = outlink->src;
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FramepackContext *s = ctx->priv;
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AVStereo3D *stereo;
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int ret, i;
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/* get a frame on the either input, stop as soon as a video ends */
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for (i = 0; i < 2; i++) {
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if (!s->input_views[i]) {
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ret = ff_request_frame(ctx->inputs[i]);
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if (ret < 0)
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return ret;
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}
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}
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if (s->format == AV_STEREO3D_FRAMESEQUENCE) {
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if (s->double_pts == AV_NOPTS_VALUE)
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s->double_pts = s->input_views[LEFT]->pts;
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for (i = 0; i < 2; i++) {
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// set correct timestamps
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s->input_views[i]->pts = s->double_pts++;
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// set stereo3d side data
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stereo = av_stereo3d_create_side_data(s->input_views[i]);
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if (!stereo)
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return AVERROR(ENOMEM);
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stereo->type = s->format;
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// filter the frame and immediately relinquish its pointer
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ret = ff_filter_frame(outlink, s->input_views[i]);
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s->input_views[i] = NULL;
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if (ret < 0)
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return ret;
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}
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return ret;
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} else {
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AVFrame *dst = ff_get_video_buffer(outlink, outlink->w, outlink->h);
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if (!dst)
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return AVERROR(ENOMEM);
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spatial_frame_pack(outlink, dst);
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// get any property from the original frame
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ret = av_frame_copy_props(dst, s->input_views[LEFT]);
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if (ret < 0) {
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av_frame_free(&dst);
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return ret;
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}
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for (i = 0; i < 2; i++)
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av_frame_free(&s->input_views[i]);
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// set stereo3d side data
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stereo = av_stereo3d_create_side_data(dst);
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if (!stereo) {
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av_frame_free(&dst);
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return AVERROR(ENOMEM);
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}
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stereo->type = s->format;
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return ff_filter_frame(outlink, dst);
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}
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}
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#define OFFSET(x) offsetof(FramepackContext, x)
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#define V AV_OPT_FLAG_VIDEO_PARAM
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static const AVOption options[] = {
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{ "format", "Frame pack output format", OFFSET(format), AV_OPT_TYPE_INT,
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{ .i64 = AV_STEREO3D_SIDEBYSIDE }, 0, INT_MAX, .flags = V, .unit = "format" },
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{ "sbs", "Views are packed next to each other", 0, AV_OPT_TYPE_CONST,
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{ .i64 = AV_STEREO3D_SIDEBYSIDE }, INT_MIN, INT_MAX, .flags = V, .unit = "format" },
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{ "tab", "Views are packed on top of each other", 0, AV_OPT_TYPE_CONST,
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{ .i64 = AV_STEREO3D_TOPBOTTOM }, INT_MIN, INT_MAX, .flags = V, .unit = "format" },
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{ "frameseq", "Views are one after the other", 0, AV_OPT_TYPE_CONST,
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{ .i64 = AV_STEREO3D_FRAMESEQUENCE }, INT_MIN, INT_MAX, .flags = V, .unit = "format" },
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{ "lines", "Views are interleaved by lines", 0, AV_OPT_TYPE_CONST,
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{ .i64 = AV_STEREO3D_LINES }, INT_MIN, INT_MAX, .flags = V, .unit = "format" },
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{ "columns", "Views are interleaved by columns", 0, AV_OPT_TYPE_CONST,
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{ .i64 = AV_STEREO3D_COLUMNS }, INT_MIN, INT_MAX, .flags = V, .unit = "format" },
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{ NULL },
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};
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static const AVClass framepack_class = {
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.class_name = "framepack",
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.item_name = av_default_item_name,
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.option = options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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static const AVFilterPad framepack_inputs[] = {
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{
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.name = "left",
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.type = AVMEDIA_TYPE_VIDEO,
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.filter_frame = filter_frame_left,
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.needs_fifo = 1,
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},
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{
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.name = "right",
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.type = AVMEDIA_TYPE_VIDEO,
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.filter_frame = filter_frame_right,
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.needs_fifo = 1,
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},
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{ NULL }
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};
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static const AVFilterPad framepack_outputs[] = {
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{
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.name = "packed",
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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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AVFilter ff_vf_framepack = {
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.name = "framepack",
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.description = NULL_IF_CONFIG_SMALL("Generate a frame packed stereoscopic video."),
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.priv_size = sizeof(FramepackContext),
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.priv_class = &framepack_class,
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.query_formats = query_formats,
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.inputs = framepack_inputs,
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.outputs = framepack_outputs,
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.uninit = framepack_uninit,
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};
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