mirror of
https://github.com/xenia-project/FFmpeg.git
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232 lines
7.9 KiB
C
232 lines
7.9 KiB
C
/*
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* Copyright (c) 2008 Vitor Sessak
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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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/**
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* @file
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* memory buffer source filter
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*/
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#include "avfilter.h"
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#include "vsrc_buffer.h"
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#include "libavutil/imgutils.h"
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typedef struct {
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int64_t pts;
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AVFrame frame;
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int has_frame;
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int h, w;
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enum PixelFormat pix_fmt;
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AVRational time_base; ///< time_base to set in the output link
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AVRational sample_aspect_ratio;
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char sws_param[256];
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} BufferSourceContext;
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int av_vsrc_buffer_add_frame2(AVFilterContext *buffer_filter, AVFrame *frame,
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int64_t pts, int width,
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int height, enum PixelFormat pix_fmt,
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const char *sws_param)
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{
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BufferSourceContext *c = buffer_filter->priv;
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int ret;
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if (c->has_frame) {
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av_log(buffer_filter, AV_LOG_ERROR,
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"Buffering several frames is not supported. "
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"Please consume all available frames before adding a new one.\n"
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);
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//return -1;
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}
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if(!c->sws_param[0]){
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snprintf(c->sws_param, 255, "%d:%d:%s", c->w, c->h, sws_param);
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}
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if(width != c->w || height != c->h || pix_fmt != c->pix_fmt){
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AVFilterContext *scale= buffer_filter->outputs[0]->dst;
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AVFilterLink *link;
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av_log(buffer_filter, AV_LOG_INFO,
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"Buffer video input changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
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c->w, c->h, av_pix_fmt_descriptors[c->pix_fmt].name,
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width, height, av_pix_fmt_descriptors[pix_fmt].name);
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if(!scale || strcmp(scale->filter->name,"scale")){
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AVFilter *f= avfilter_get_by_name("scale");
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av_log(buffer_filter, AV_LOG_INFO, "Inserting scaler filter\n");
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if(avfilter_open(&scale, f, "Input equalizer") < 0)
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return -1;
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if((ret=avfilter_init_filter(scale, c->sws_param, NULL))<0){
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avfilter_free(scale);
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return ret;
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}
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if((ret=avfilter_insert_filter(buffer_filter->outputs[0], scale, 0, 0))<0){
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avfilter_free(scale);
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return ret;
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}
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scale->outputs[0]->time_base = scale->inputs[0]->time_base;
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scale->outputs[0]->format= c->pix_fmt;
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} else if(!strcmp(scale->filter->name, "scale")) {
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snprintf(c->sws_param, 255, "%d:%d:%s", scale->outputs[0]->w, scale->outputs[0]->h, sws_param);
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scale->filter->init(scale, c->sws_param, NULL);
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}
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c->pix_fmt= scale->inputs[0]->format= pix_fmt;
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c->w= scale->inputs[0]->w= width;
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c->h= scale->inputs[0]->h= height;
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link= scale->outputs[0];
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if ((ret = link->srcpad->config_props(link)) < 0)
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return ret;
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}
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memcpy(c->frame.data , frame->data , sizeof(frame->data));
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memcpy(c->frame.linesize, frame->linesize, sizeof(frame->linesize));
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c->frame.interlaced_frame= frame->interlaced_frame;
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c->frame.top_field_first = frame->top_field_first;
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c->frame.key_frame = frame->key_frame;
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c->frame.pict_type = frame->pict_type;
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c->frame.sample_aspect_ratio = frame->sample_aspect_ratio;
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c->pts = pts;
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c->has_frame = 1;
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return 0;
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}
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int av_vsrc_buffer_add_frame(AVFilterContext *buffer_filter, AVFrame *frame,
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int64_t pts)
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{
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BufferSourceContext *c = buffer_filter->priv;
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return av_vsrc_buffer_add_frame2(buffer_filter, frame,
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pts, c->w,
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c->h, c->pix_fmt, "");
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}
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static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
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{
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BufferSourceContext *c = ctx->priv;
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char pix_fmt_str[128];
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int n = 0;
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if (!args ||
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(n = sscanf(args, "%d:%d:%127[^:]:%d:%d:%d:%d", &c->w, &c->h, pix_fmt_str,
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&c->time_base.num, &c->time_base.den,
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&c->sample_aspect_ratio.num, &c->sample_aspect_ratio.den)) != 7) {
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av_log(ctx, AV_LOG_ERROR, "Expected 7 arguments, but only %d found in '%s'\n", n, args);
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return AVERROR(EINVAL);
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}
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if ((c->pix_fmt = av_get_pix_fmt(pix_fmt_str)) == PIX_FMT_NONE) {
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char *tail;
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c->pix_fmt = strtol(pix_fmt_str, &tail, 10);
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if (*tail || c->pix_fmt < 0 || c->pix_fmt >= PIX_FMT_NB) {
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av_log(ctx, AV_LOG_ERROR, "Invalid pixel format string '%s'\n", pix_fmt_str);
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return AVERROR(EINVAL);
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}
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}
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av_log(ctx, AV_LOG_INFO, "w:%d h:%d pixfmt:%s\n", c->w, c->h, av_pix_fmt_descriptors[c->pix_fmt].name);
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return 0;
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}
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static int query_formats(AVFilterContext *ctx)
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{
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BufferSourceContext *c = ctx->priv;
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enum PixelFormat pix_fmts[] = { c->pix_fmt, PIX_FMT_NONE };
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avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts));
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return 0;
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}
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static int config_props(AVFilterLink *link)
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{
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BufferSourceContext *c = link->src->priv;
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link->w = c->w;
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link->h = c->h;
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link->sample_aspect_ratio = c->sample_aspect_ratio;
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link->time_base = c->time_base;
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return 0;
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}
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static int request_frame(AVFilterLink *link)
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{
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BufferSourceContext *c = link->src->priv;
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AVFilterBufferRef *picref;
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if (!c->has_frame) {
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av_log(link->src, AV_LOG_ERROR,
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"request_frame() called with no available frame!\n");
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//return -1;
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}
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/* This picture will be needed unmodified later for decoding the next
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* frame */
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picref = avfilter_get_video_buffer(link, AV_PERM_WRITE | AV_PERM_PRESERVE |
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AV_PERM_REUSE2,
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link->w, link->h);
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av_image_copy(picref->data, picref->linesize,
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c->frame.data, c->frame.linesize,
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picref->format, link->w, link->h);
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picref->pts = c->pts;
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picref->video->sample_aspect_ratio = c->frame.sample_aspect_ratio;
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picref->video->interlaced = c->frame.interlaced_frame;
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picref->video->top_field_first = c->frame.top_field_first;
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picref->video->key_frame = c->frame.key_frame;
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picref->video->pict_type = c->frame.pict_type;
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avfilter_start_frame(link, avfilter_ref_buffer(picref, ~0));
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avfilter_draw_slice(link, 0, link->h, 1);
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avfilter_end_frame(link);
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avfilter_unref_buffer(picref);
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c->has_frame = 0;
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return 0;
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}
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static int poll_frame(AVFilterLink *link)
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{
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BufferSourceContext *c = link->src->priv;
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return !!(c->has_frame);
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}
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AVFilter avfilter_vsrc_buffer = {
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.name = "buffer",
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.description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them accessible to the filterchain."),
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.priv_size = sizeof(BufferSourceContext),
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.query_formats = query_formats,
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.init = init,
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.inputs = (AVFilterPad[]) {{ .name = NULL }},
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.outputs = (AVFilterPad[]) {{ .name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.request_frame = request_frame,
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.poll_frame = poll_frame,
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.config_props = config_props, },
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{ .name = NULL}},
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};
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