mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-08-25 19:01:51 +02:00
1645 lines
51 KiB
C
1645 lines
51 KiB
C
/*
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* filter layer
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* Copyright (c) 2007 Bobby Bingham
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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/atomic.h"
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#include "libavutil/avassert.h"
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#include "libavutil/avstring.h"
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#include "libavutil/buffer.h"
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#include "libavutil/channel_layout.h"
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#include "libavutil/common.h"
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#include "libavutil/eval.h"
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#include "libavutil/hwcontext.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/internal.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/samplefmt.h"
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#define FF_INTERNAL_FIELDS 1
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#include "framequeue.h"
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#include "audio.h"
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#include "avfilter.h"
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#include "filters.h"
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#include "formats.h"
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#include "internal.h"
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#include "libavutil/ffversion.h"
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const char av_filter_ffversion[] = "FFmpeg version " FFMPEG_VERSION;
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void ff_tlog_ref(void *ctx, AVFrame *ref, int end)
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{
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av_unused char buf[16];
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ff_tlog(ctx,
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"ref[%p buf:%p data:%p linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64,
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ref, ref->buf, ref->data[0],
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ref->linesize[0], ref->linesize[1], ref->linesize[2], ref->linesize[3],
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ref->pts, ref->pkt_pos);
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if (ref->width) {
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ff_tlog(ctx, " a:%d/%d s:%dx%d i:%c iskey:%d type:%c",
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ref->sample_aspect_ratio.num, ref->sample_aspect_ratio.den,
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ref->width, ref->height,
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!ref->interlaced_frame ? 'P' : /* Progressive */
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ref->top_field_first ? 'T' : 'B', /* Top / Bottom */
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ref->key_frame,
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av_get_picture_type_char(ref->pict_type));
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}
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if (ref->nb_samples) {
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ff_tlog(ctx, " cl:%"PRId64"d n:%d r:%d",
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ref->channel_layout,
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ref->nb_samples,
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ref->sample_rate);
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}
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ff_tlog(ctx, "]%s", end ? "\n" : "");
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}
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unsigned avfilter_version(void)
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{
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av_assert0(LIBAVFILTER_VERSION_MICRO >= 100);
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return LIBAVFILTER_VERSION_INT;
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}
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const char *avfilter_configuration(void)
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{
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return FFMPEG_CONFIGURATION;
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}
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const char *avfilter_license(void)
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{
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#define LICENSE_PREFIX "libavfilter license: "
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return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
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}
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void ff_command_queue_pop(AVFilterContext *filter)
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{
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AVFilterCommand *c= filter->command_queue;
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av_freep(&c->arg);
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av_freep(&c->command);
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filter->command_queue= c->next;
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av_free(c);
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}
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int ff_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
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AVFilterPad **pads, AVFilterLink ***links,
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AVFilterPad *newpad)
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{
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AVFilterLink **newlinks;
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AVFilterPad *newpads;
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unsigned i;
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idx = FFMIN(idx, *count);
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newpads = av_realloc_array(*pads, *count + 1, sizeof(AVFilterPad));
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newlinks = av_realloc_array(*links, *count + 1, sizeof(AVFilterLink*));
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if (newpads)
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*pads = newpads;
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if (newlinks)
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*links = newlinks;
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if (!newpads || !newlinks)
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return AVERROR(ENOMEM);
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memmove(*pads + idx + 1, *pads + idx, sizeof(AVFilterPad) * (*count - idx));
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memmove(*links + idx + 1, *links + idx, sizeof(AVFilterLink*) * (*count - idx));
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memcpy(*pads + idx, newpad, sizeof(AVFilterPad));
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(*links)[idx] = NULL;
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(*count)++;
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for (i = idx + 1; i < *count; i++)
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if ((*links)[i])
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(*(unsigned *)((uint8_t *) (*links)[i] + padidx_off))++;
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return 0;
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}
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int avfilter_link(AVFilterContext *src, unsigned srcpad,
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AVFilterContext *dst, unsigned dstpad)
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{
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AVFilterLink *link;
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av_assert0(src->graph);
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av_assert0(dst->graph);
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av_assert0(src->graph == dst->graph);
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if (src->nb_outputs <= srcpad || dst->nb_inputs <= dstpad ||
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src->outputs[srcpad] || dst->inputs[dstpad])
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return AVERROR(EINVAL);
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if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) {
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av_log(src, AV_LOG_ERROR,
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"Media type mismatch between the '%s' filter output pad %d (%s) and the '%s' filter input pad %d (%s)\n",
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src->name, srcpad, (char *)av_x_if_null(av_get_media_type_string(src->output_pads[srcpad].type), "?"),
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dst->name, dstpad, (char *)av_x_if_null(av_get_media_type_string(dst-> input_pads[dstpad].type), "?"));
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return AVERROR(EINVAL);
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}
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link = av_mallocz(sizeof(*link));
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if (!link)
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return AVERROR(ENOMEM);
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src->outputs[srcpad] = dst->inputs[dstpad] = link;
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link->src = src;
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link->dst = dst;
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link->srcpad = &src->output_pads[srcpad];
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link->dstpad = &dst->input_pads[dstpad];
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link->type = src->output_pads[srcpad].type;
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av_assert0(AV_PIX_FMT_NONE == -1 && AV_SAMPLE_FMT_NONE == -1);
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link->format = -1;
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ff_framequeue_init(&link->fifo, &src->graph->internal->frame_queues);
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return 0;
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}
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void avfilter_link_free(AVFilterLink **link)
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{
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if (!*link)
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return;
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av_frame_free(&(*link)->partial_buf);
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ff_framequeue_free(&(*link)->fifo);
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ff_frame_pool_uninit((FFFramePool**)&(*link)->frame_pool);
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av_freep(link);
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}
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int avfilter_link_get_channels(AVFilterLink *link)
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{
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return link->channels;
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}
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void ff_filter_set_ready(AVFilterContext *filter, unsigned priority)
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{
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filter->ready = FFMAX(filter->ready, priority);
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}
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/**
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* Clear frame_blocked_in on all outputs.
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* This is necessary whenever something changes on input.
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*/
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static void filter_unblock(AVFilterContext *filter)
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{
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unsigned i;
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for (i = 0; i < filter->nb_outputs; i++)
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filter->outputs[i]->frame_blocked_in = 0;
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}
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void ff_avfilter_link_set_in_status(AVFilterLink *link, int status, int64_t pts)
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{
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if (link->status_in == status)
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return;
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av_assert0(!link->status_in);
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link->status_in = status;
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link->status_in_pts = pts;
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link->frame_wanted_out = 0;
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link->frame_blocked_in = 0;
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filter_unblock(link->dst);
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ff_filter_set_ready(link->dst, 200);
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}
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void ff_avfilter_link_set_out_status(AVFilterLink *link, int status, int64_t pts)
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{
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av_assert0(!link->frame_wanted_out);
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av_assert0(!link->status_out);
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link->status_out = status;
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if (pts != AV_NOPTS_VALUE)
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ff_update_link_current_pts(link, pts);
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filter_unblock(link->dst);
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ff_filter_set_ready(link->src, 200);
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}
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void avfilter_link_set_closed(AVFilterLink *link, int closed)
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{
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ff_avfilter_link_set_out_status(link, closed ? AVERROR_EOF : 0, AV_NOPTS_VALUE);
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}
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int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
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unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
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{
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int ret;
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unsigned dstpad_idx = link->dstpad - link->dst->input_pads;
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av_log(link->dst, AV_LOG_VERBOSE, "auto-inserting filter '%s' "
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"between the filter '%s' and the filter '%s'\n",
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filt->name, link->src->name, link->dst->name);
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link->dst->inputs[dstpad_idx] = NULL;
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if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) {
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/* failed to link output filter to new filter */
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link->dst->inputs[dstpad_idx] = link;
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return ret;
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}
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/* re-hookup the link to the new destination filter we inserted */
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link->dst = filt;
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link->dstpad = &filt->input_pads[filt_srcpad_idx];
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filt->inputs[filt_srcpad_idx] = link;
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/* if any information on supported media formats already exists on the
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* link, we need to preserve that */
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if (link->out_formats)
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ff_formats_changeref(&link->out_formats,
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&filt->outputs[filt_dstpad_idx]->out_formats);
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if (link->out_samplerates)
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ff_formats_changeref(&link->out_samplerates,
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&filt->outputs[filt_dstpad_idx]->out_samplerates);
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if (link->out_channel_layouts)
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ff_channel_layouts_changeref(&link->out_channel_layouts,
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&filt->outputs[filt_dstpad_idx]->out_channel_layouts);
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return 0;
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}
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int avfilter_config_links(AVFilterContext *filter)
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{
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int (*config_link)(AVFilterLink *);
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unsigned i;
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int ret;
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for (i = 0; i < filter->nb_inputs; i ++) {
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AVFilterLink *link = filter->inputs[i];
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AVFilterLink *inlink;
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if (!link) continue;
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if (!link->src || !link->dst) {
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av_log(filter, AV_LOG_ERROR,
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"Not all input and output are properly linked (%d).\n", i);
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return AVERROR(EINVAL);
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}
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inlink = link->src->nb_inputs ? link->src->inputs[0] : NULL;
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link->current_pts =
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link->current_pts_us = AV_NOPTS_VALUE;
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switch (link->init_state) {
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case AVLINK_INIT:
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continue;
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case AVLINK_STARTINIT:
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av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");
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return 0;
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case AVLINK_UNINIT:
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link->init_state = AVLINK_STARTINIT;
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if ((ret = avfilter_config_links(link->src)) < 0)
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return ret;
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if (!(config_link = link->srcpad->config_props)) {
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if (link->src->nb_inputs != 1) {
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av_log(link->src, AV_LOG_ERROR, "Source filters and filters "
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"with more than one input "
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"must set config_props() "
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"callbacks on all outputs\n");
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return AVERROR(EINVAL);
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}
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} else if ((ret = config_link(link)) < 0) {
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av_log(link->src, AV_LOG_ERROR,
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"Failed to configure output pad on %s\n",
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link->src->name);
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return ret;
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}
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switch (link->type) {
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case AVMEDIA_TYPE_VIDEO:
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if (!link->time_base.num && !link->time_base.den)
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link->time_base = inlink ? inlink->time_base : AV_TIME_BASE_Q;
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if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den)
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link->sample_aspect_ratio = inlink ?
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inlink->sample_aspect_ratio : (AVRational){1,1};
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if (inlink) {
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if (!link->frame_rate.num && !link->frame_rate.den)
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link->frame_rate = inlink->frame_rate;
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if (!link->w)
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link->w = inlink->w;
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if (!link->h)
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link->h = inlink->h;
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} else if (!link->w || !link->h) {
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av_log(link->src, AV_LOG_ERROR,
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"Video source filters must set their output link's "
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"width and height\n");
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return AVERROR(EINVAL);
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}
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break;
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case AVMEDIA_TYPE_AUDIO:
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if (inlink) {
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if (!link->time_base.num && !link->time_base.den)
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link->time_base = inlink->time_base;
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}
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if (!link->time_base.num && !link->time_base.den)
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link->time_base = (AVRational) {1, link->sample_rate};
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}
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if (link->src->nb_inputs && link->src->inputs[0]->hw_frames_ctx &&
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!(link->src->filter->flags_internal & FF_FILTER_FLAG_HWFRAME_AWARE)) {
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av_assert0(!link->hw_frames_ctx &&
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"should not be set by non-hwframe-aware filter");
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link->hw_frames_ctx = av_buffer_ref(link->src->inputs[0]->hw_frames_ctx);
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if (!link->hw_frames_ctx)
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return AVERROR(ENOMEM);
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}
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if ((config_link = link->dstpad->config_props))
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if ((ret = config_link(link)) < 0) {
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av_log(link->dst, AV_LOG_ERROR,
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"Failed to configure input pad on %s\n",
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link->dst->name);
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return ret;
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}
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link->init_state = AVLINK_INIT;
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}
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}
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return 0;
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}
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void ff_tlog_link(void *ctx, AVFilterLink *link, int end)
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{
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if (link->type == AVMEDIA_TYPE_VIDEO) {
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ff_tlog(ctx,
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"link[%p s:%dx%d fmt:%s %s->%s]%s",
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link, link->w, link->h,
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av_get_pix_fmt_name(link->format),
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link->src ? link->src->filter->name : "",
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link->dst ? link->dst->filter->name : "",
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end ? "\n" : "");
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} else {
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char buf[128];
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av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
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ff_tlog(ctx,
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"link[%p r:%d cl:%s fmt:%s %s->%s]%s",
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link, (int)link->sample_rate, buf,
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av_get_sample_fmt_name(link->format),
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link->src ? link->src->filter->name : "",
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link->dst ? link->dst->filter->name : "",
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end ? "\n" : "");
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}
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}
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int ff_request_frame(AVFilterLink *link)
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{
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FF_TPRINTF_START(NULL, request_frame); ff_tlog_link(NULL, link, 1);
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av_assert1(!link->dst->filter->activate);
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if (link->status_out)
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return link->status_out;
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if (link->status_in) {
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if (ff_framequeue_queued_frames(&link->fifo)) {
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av_assert1(!link->frame_wanted_out);
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av_assert1(link->dst->ready >= 300);
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return 0;
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} else {
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/* Acknowledge status change. Filters using ff_request_frame() will
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handle the change automatically. Filters can also check the
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status directly but none do yet. */
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ff_avfilter_link_set_out_status(link, link->status_in, link->status_in_pts);
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return link->status_out;
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}
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}
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link->frame_wanted_out = 1;
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ff_filter_set_ready(link->src, 100);
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return 0;
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}
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static int ff_request_frame_to_filter(AVFilterLink *link)
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{
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int ret = -1;
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FF_TPRINTF_START(NULL, request_frame_to_filter); ff_tlog_link(NULL, link, 1);
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/* Assume the filter is blocked, let the method clear it if not */
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link->frame_blocked_in = 1;
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if (link->srcpad->request_frame)
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ret = link->srcpad->request_frame(link);
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else if (link->src->inputs[0])
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ret = ff_request_frame(link->src->inputs[0]);
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if (ret < 0) {
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if (ret != AVERROR(EAGAIN) && ret != link->status_in)
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ff_avfilter_link_set_in_status(link, ret, AV_NOPTS_VALUE);
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if (ret == AVERROR_EOF)
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ret = 0;
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}
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return ret;
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}
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int ff_poll_frame(AVFilterLink *link)
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{
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int i, min = INT_MAX;
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if (link->srcpad->poll_frame)
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return link->srcpad->poll_frame(link);
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for (i = 0; i < link->src->nb_inputs; i++) {
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int val;
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if (!link->src->inputs[i])
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return AVERROR(EINVAL);
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val = ff_poll_frame(link->src->inputs[i]);
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min = FFMIN(min, val);
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}
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return min;
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}
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static const char *const var_names[] = {
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"t",
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"n",
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"pos",
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"w",
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"h",
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NULL
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};
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enum {
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VAR_T,
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VAR_N,
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VAR_POS,
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VAR_W,
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VAR_H,
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VAR_VARS_NB
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};
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|
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static int set_enable_expr(AVFilterContext *ctx, const char *expr)
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{
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int ret;
|
|
char *expr_dup;
|
|
AVExpr *old = ctx->enable;
|
|
|
|
if (!(ctx->filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE)) {
|
|
av_log(ctx, AV_LOG_ERROR, "Timeline ('enable' option) not supported "
|
|
"with filter '%s'\n", ctx->filter->name);
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
|
|
expr_dup = av_strdup(expr);
|
|
if (!expr_dup)
|
|
return AVERROR(ENOMEM);
|
|
|
|
if (!ctx->var_values) {
|
|
ctx->var_values = av_calloc(VAR_VARS_NB, sizeof(*ctx->var_values));
|
|
if (!ctx->var_values) {
|
|
av_free(expr_dup);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
}
|
|
|
|
ret = av_expr_parse((AVExpr**)&ctx->enable, expr_dup, var_names,
|
|
NULL, NULL, NULL, NULL, 0, ctx->priv);
|
|
if (ret < 0) {
|
|
av_log(ctx->priv, AV_LOG_ERROR,
|
|
"Error when evaluating the expression '%s' for enable\n",
|
|
expr_dup);
|
|
av_free(expr_dup);
|
|
return ret;
|
|
}
|
|
|
|
av_expr_free(old);
|
|
av_free(ctx->enable_str);
|
|
ctx->enable_str = expr_dup;
|
|
return 0;
|
|
}
|
|
|
|
void ff_update_link_current_pts(AVFilterLink *link, int64_t pts)
|
|
{
|
|
if (pts == AV_NOPTS_VALUE)
|
|
return;
|
|
link->current_pts = pts;
|
|
link->current_pts_us = av_rescale_q(pts, link->time_base, AV_TIME_BASE_Q);
|
|
/* TODO use duration */
|
|
if (link->graph && link->age_index >= 0)
|
|
ff_avfilter_graph_update_heap(link->graph, link);
|
|
}
|
|
|
|
int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
|
|
{
|
|
if(!strcmp(cmd, "ping")){
|
|
char local_res[256] = {0};
|
|
|
|
if (!res) {
|
|
res = local_res;
|
|
res_len = sizeof(local_res);
|
|
}
|
|
av_strlcatf(res, res_len, "pong from:%s %s\n", filter->filter->name, filter->name);
|
|
if (res == local_res)
|
|
av_log(filter, AV_LOG_INFO, "%s", res);
|
|
return 0;
|
|
}else if(!strcmp(cmd, "enable")) {
|
|
return set_enable_expr(filter, arg);
|
|
}else if(filter->filter->process_command) {
|
|
return filter->filter->process_command(filter, cmd, arg, res, res_len, flags);
|
|
}
|
|
return AVERROR(ENOSYS);
|
|
}
|
|
|
|
static AVFilter *first_filter;
|
|
static AVFilter **last_filter = &first_filter;
|
|
|
|
#if !FF_API_NOCONST_GET_NAME
|
|
const
|
|
#endif
|
|
AVFilter *avfilter_get_by_name(const char *name)
|
|
{
|
|
const AVFilter *f = NULL;
|
|
|
|
if (!name)
|
|
return NULL;
|
|
|
|
while ((f = avfilter_next(f)))
|
|
if (!strcmp(f->name, name))
|
|
return (AVFilter *)f;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
int avfilter_register(AVFilter *filter)
|
|
{
|
|
AVFilter **f = last_filter;
|
|
|
|
/* the filter must select generic or internal exclusively */
|
|
av_assert0((filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE) != AVFILTER_FLAG_SUPPORT_TIMELINE);
|
|
|
|
filter->next = NULL;
|
|
|
|
while(*f || avpriv_atomic_ptr_cas((void * volatile *)f, NULL, filter))
|
|
f = &(*f)->next;
|
|
last_filter = &filter->next;
|
|
|
|
return 0;
|
|
}
|
|
|
|
const AVFilter *avfilter_next(const AVFilter *prev)
|
|
{
|
|
return prev ? prev->next : first_filter;
|
|
}
|
|
|
|
#if FF_API_OLD_FILTER_REGISTER
|
|
AVFilter **av_filter_next(AVFilter **filter)
|
|
{
|
|
return filter ? &(*filter)->next : &first_filter;
|
|
}
|
|
|
|
void avfilter_uninit(void)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
int avfilter_pad_count(const AVFilterPad *pads)
|
|
{
|
|
int count;
|
|
|
|
if (!pads)
|
|
return 0;
|
|
|
|
for (count = 0; pads->name; count++)
|
|
pads++;
|
|
return count;
|
|
}
|
|
|
|
static const char *default_filter_name(void *filter_ctx)
|
|
{
|
|
AVFilterContext *ctx = filter_ctx;
|
|
return ctx->name ? ctx->name : ctx->filter->name;
|
|
}
|
|
|
|
static void *filter_child_next(void *obj, void *prev)
|
|
{
|
|
AVFilterContext *ctx = obj;
|
|
if (!prev && ctx->filter && ctx->filter->priv_class && ctx->priv)
|
|
return ctx->priv;
|
|
return NULL;
|
|
}
|
|
|
|
static const AVClass *filter_child_class_next(const AVClass *prev)
|
|
{
|
|
const AVFilter *f = NULL;
|
|
|
|
/* find the filter that corresponds to prev */
|
|
while (prev && (f = avfilter_next(f)))
|
|
if (f->priv_class == prev)
|
|
break;
|
|
|
|
/* could not find filter corresponding to prev */
|
|
if (prev && !f)
|
|
return NULL;
|
|
|
|
/* find next filter with specific options */
|
|
while ((f = avfilter_next(f)))
|
|
if (f->priv_class)
|
|
return f->priv_class;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
#define OFFSET(x) offsetof(AVFilterContext, x)
|
|
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM
|
|
static const AVOption avfilter_options[] = {
|
|
{ "thread_type", "Allowed thread types", OFFSET(thread_type), AV_OPT_TYPE_FLAGS,
|
|
{ .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, FLAGS, "thread_type" },
|
|
{ "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .unit = "thread_type" },
|
|
{ "enable", "set enable expression", OFFSET(enable_str), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
|
|
{ "threads", "Allowed number of threads", OFFSET(nb_threads), AV_OPT_TYPE_INT,
|
|
{ .i64 = 0 }, 0, INT_MAX, FLAGS },
|
|
{ NULL },
|
|
};
|
|
|
|
static const AVClass avfilter_class = {
|
|
.class_name = "AVFilter",
|
|
.item_name = default_filter_name,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
.category = AV_CLASS_CATEGORY_FILTER,
|
|
.child_next = filter_child_next,
|
|
.child_class_next = filter_child_class_next,
|
|
.option = avfilter_options,
|
|
};
|
|
|
|
static int default_execute(AVFilterContext *ctx, avfilter_action_func *func, void *arg,
|
|
int *ret, int nb_jobs)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < nb_jobs; i++) {
|
|
int r = func(ctx, arg, i, nb_jobs);
|
|
if (ret)
|
|
ret[i] = r;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
AVFilterContext *ff_filter_alloc(const AVFilter *filter, const char *inst_name)
|
|
{
|
|
AVFilterContext *ret;
|
|
|
|
if (!filter)
|
|
return NULL;
|
|
|
|
ret = av_mallocz(sizeof(AVFilterContext));
|
|
if (!ret)
|
|
return NULL;
|
|
|
|
ret->av_class = &avfilter_class;
|
|
ret->filter = filter;
|
|
ret->name = inst_name ? av_strdup(inst_name) : NULL;
|
|
if (filter->priv_size) {
|
|
ret->priv = av_mallocz(filter->priv_size);
|
|
if (!ret->priv)
|
|
goto err;
|
|
}
|
|
|
|
av_opt_set_defaults(ret);
|
|
if (filter->priv_class) {
|
|
*(const AVClass**)ret->priv = filter->priv_class;
|
|
av_opt_set_defaults(ret->priv);
|
|
}
|
|
|
|
ret->internal = av_mallocz(sizeof(*ret->internal));
|
|
if (!ret->internal)
|
|
goto err;
|
|
ret->internal->execute = default_execute;
|
|
|
|
ret->nb_inputs = avfilter_pad_count(filter->inputs);
|
|
if (ret->nb_inputs ) {
|
|
ret->input_pads = av_malloc_array(ret->nb_inputs, sizeof(AVFilterPad));
|
|
if (!ret->input_pads)
|
|
goto err;
|
|
memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->nb_inputs);
|
|
ret->inputs = av_mallocz_array(ret->nb_inputs, sizeof(AVFilterLink*));
|
|
if (!ret->inputs)
|
|
goto err;
|
|
}
|
|
|
|
ret->nb_outputs = avfilter_pad_count(filter->outputs);
|
|
if (ret->nb_outputs) {
|
|
ret->output_pads = av_malloc_array(ret->nb_outputs, sizeof(AVFilterPad));
|
|
if (!ret->output_pads)
|
|
goto err;
|
|
memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->nb_outputs);
|
|
ret->outputs = av_mallocz_array(ret->nb_outputs, sizeof(AVFilterLink*));
|
|
if (!ret->outputs)
|
|
goto err;
|
|
}
|
|
|
|
return ret;
|
|
|
|
err:
|
|
av_freep(&ret->inputs);
|
|
av_freep(&ret->input_pads);
|
|
ret->nb_inputs = 0;
|
|
av_freep(&ret->outputs);
|
|
av_freep(&ret->output_pads);
|
|
ret->nb_outputs = 0;
|
|
av_freep(&ret->priv);
|
|
av_freep(&ret->internal);
|
|
av_free(ret);
|
|
return NULL;
|
|
}
|
|
|
|
#if FF_API_AVFILTER_OPEN
|
|
int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
|
|
{
|
|
*filter_ctx = ff_filter_alloc(filter, inst_name);
|
|
return *filter_ctx ? 0 : AVERROR(ENOMEM);
|
|
}
|
|
#endif
|
|
|
|
static void free_link(AVFilterLink *link)
|
|
{
|
|
if (!link)
|
|
return;
|
|
|
|
if (link->src)
|
|
link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
|
|
if (link->dst)
|
|
link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
|
|
|
|
av_buffer_unref(&link->hw_frames_ctx);
|
|
|
|
ff_formats_unref(&link->in_formats);
|
|
ff_formats_unref(&link->out_formats);
|
|
ff_formats_unref(&link->in_samplerates);
|
|
ff_formats_unref(&link->out_samplerates);
|
|
ff_channel_layouts_unref(&link->in_channel_layouts);
|
|
ff_channel_layouts_unref(&link->out_channel_layouts);
|
|
avfilter_link_free(&link);
|
|
}
|
|
|
|
void avfilter_free(AVFilterContext *filter)
|
|
{
|
|
int i;
|
|
|
|
if (!filter)
|
|
return;
|
|
|
|
if (filter->graph)
|
|
ff_filter_graph_remove_filter(filter->graph, filter);
|
|
|
|
if (filter->filter->uninit)
|
|
filter->filter->uninit(filter);
|
|
|
|
for (i = 0; i < filter->nb_inputs; i++) {
|
|
free_link(filter->inputs[i]);
|
|
}
|
|
for (i = 0; i < filter->nb_outputs; i++) {
|
|
free_link(filter->outputs[i]);
|
|
}
|
|
|
|
if (filter->filter->priv_class)
|
|
av_opt_free(filter->priv);
|
|
|
|
av_buffer_unref(&filter->hw_device_ctx);
|
|
|
|
av_freep(&filter->name);
|
|
av_freep(&filter->input_pads);
|
|
av_freep(&filter->output_pads);
|
|
av_freep(&filter->inputs);
|
|
av_freep(&filter->outputs);
|
|
av_freep(&filter->priv);
|
|
while(filter->command_queue){
|
|
ff_command_queue_pop(filter);
|
|
}
|
|
av_opt_free(filter);
|
|
av_expr_free(filter->enable);
|
|
filter->enable = NULL;
|
|
av_freep(&filter->var_values);
|
|
av_freep(&filter->internal);
|
|
av_free(filter);
|
|
}
|
|
|
|
int ff_filter_get_nb_threads(AVFilterContext *ctx)
|
|
{
|
|
if (ctx->nb_threads > 0)
|
|
return FFMIN(ctx->nb_threads, ctx->graph->nb_threads);
|
|
return ctx->graph->nb_threads;
|
|
}
|
|
|
|
static int process_options(AVFilterContext *ctx, AVDictionary **options,
|
|
const char *args)
|
|
{
|
|
const AVOption *o = NULL;
|
|
int ret, count = 0;
|
|
char *av_uninit(parsed_key), *av_uninit(value);
|
|
const char *key;
|
|
int offset= -1;
|
|
|
|
if (!args)
|
|
return 0;
|
|
|
|
while (*args) {
|
|
const char *shorthand = NULL;
|
|
|
|
o = av_opt_next(ctx->priv, o);
|
|
if (o) {
|
|
if (o->type == AV_OPT_TYPE_CONST || o->offset == offset)
|
|
continue;
|
|
offset = o->offset;
|
|
shorthand = o->name;
|
|
}
|
|
|
|
ret = av_opt_get_key_value(&args, "=", ":",
|
|
shorthand ? AV_OPT_FLAG_IMPLICIT_KEY : 0,
|
|
&parsed_key, &value);
|
|
if (ret < 0) {
|
|
if (ret == AVERROR(EINVAL))
|
|
av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", args);
|
|
else
|
|
av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", args,
|
|
av_err2str(ret));
|
|
return ret;
|
|
}
|
|
if (*args)
|
|
args++;
|
|
if (parsed_key) {
|
|
key = parsed_key;
|
|
while ((o = av_opt_next(ctx->priv, o))); /* discard all remaining shorthand */
|
|
} else {
|
|
key = shorthand;
|
|
}
|
|
|
|
av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);
|
|
|
|
if (av_opt_find(ctx, key, NULL, 0, 0)) {
|
|
ret = av_opt_set(ctx, key, value, 0);
|
|
if (ret < 0) {
|
|
av_free(value);
|
|
av_free(parsed_key);
|
|
return ret;
|
|
}
|
|
} else {
|
|
av_dict_set(options, key, value, 0);
|
|
if ((ret = av_opt_set(ctx->priv, key, value, 0)) < 0) {
|
|
if (!av_opt_find(ctx->priv, key, NULL, 0, AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ)) {
|
|
if (ret == AVERROR_OPTION_NOT_FOUND)
|
|
av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key);
|
|
av_free(value);
|
|
av_free(parsed_key);
|
|
return ret;
|
|
}
|
|
}
|
|
}
|
|
|
|
av_free(value);
|
|
av_free(parsed_key);
|
|
count++;
|
|
}
|
|
|
|
if (ctx->enable_str) {
|
|
ret = set_enable_expr(ctx, ctx->enable_str);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
return count;
|
|
}
|
|
|
|
#if FF_API_AVFILTER_INIT_FILTER
|
|
int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
|
|
{
|
|
return avfilter_init_str(filter, args);
|
|
}
|
|
#endif
|
|
|
|
int avfilter_init_dict(AVFilterContext *ctx, AVDictionary **options)
|
|
{
|
|
int ret = 0;
|
|
|
|
ret = av_opt_set_dict(ctx, options);
|
|
if (ret < 0) {
|
|
av_log(ctx, AV_LOG_ERROR, "Error applying generic filter options.\n");
|
|
return ret;
|
|
}
|
|
|
|
if (ctx->filter->flags & AVFILTER_FLAG_SLICE_THREADS &&
|
|
ctx->thread_type & ctx->graph->thread_type & AVFILTER_THREAD_SLICE &&
|
|
ctx->graph->internal->thread_execute) {
|
|
ctx->thread_type = AVFILTER_THREAD_SLICE;
|
|
ctx->internal->execute = ctx->graph->internal->thread_execute;
|
|
} else {
|
|
ctx->thread_type = 0;
|
|
}
|
|
|
|
if (ctx->filter->priv_class) {
|
|
ret = av_opt_set_dict(ctx->priv, options);
|
|
if (ret < 0) {
|
|
av_log(ctx, AV_LOG_ERROR, "Error applying options to the filter.\n");
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
if (ctx->filter->init_opaque)
|
|
ret = ctx->filter->init_opaque(ctx, NULL);
|
|
else if (ctx->filter->init)
|
|
ret = ctx->filter->init(ctx);
|
|
else if (ctx->filter->init_dict)
|
|
ret = ctx->filter->init_dict(ctx, options);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int avfilter_init_str(AVFilterContext *filter, const char *args)
|
|
{
|
|
AVDictionary *options = NULL;
|
|
AVDictionaryEntry *e;
|
|
int ret = 0;
|
|
|
|
if (args && *args) {
|
|
if (!filter->filter->priv_class) {
|
|
av_log(filter, AV_LOG_ERROR, "This filter does not take any "
|
|
"options, but options were provided: %s.\n", args);
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
#if FF_API_OLD_FILTER_OPTS || FF_API_OLD_FILTER_OPTS_ERROR
|
|
if ( !strcmp(filter->filter->name, "format") ||
|
|
!strcmp(filter->filter->name, "noformat") ||
|
|
!strcmp(filter->filter->name, "frei0r") ||
|
|
!strcmp(filter->filter->name, "frei0r_src") ||
|
|
!strcmp(filter->filter->name, "ocv") ||
|
|
!strcmp(filter->filter->name, "pan") ||
|
|
!strcmp(filter->filter->name, "pp") ||
|
|
!strcmp(filter->filter->name, "aevalsrc")) {
|
|
/* a hack for compatibility with the old syntax
|
|
* replace colons with |s */
|
|
char *copy = av_strdup(args);
|
|
char *p = copy;
|
|
int nb_leading = 0; // number of leading colons to skip
|
|
int deprecated = 0;
|
|
|
|
if (!copy) {
|
|
ret = AVERROR(ENOMEM);
|
|
goto fail;
|
|
}
|
|
|
|
if (!strcmp(filter->filter->name, "frei0r") ||
|
|
!strcmp(filter->filter->name, "ocv"))
|
|
nb_leading = 1;
|
|
else if (!strcmp(filter->filter->name, "frei0r_src"))
|
|
nb_leading = 3;
|
|
|
|
while (nb_leading--) {
|
|
p = strchr(p, ':');
|
|
if (!p) {
|
|
p = copy + strlen(copy);
|
|
break;
|
|
}
|
|
p++;
|
|
}
|
|
|
|
deprecated = strchr(p, ':') != NULL;
|
|
|
|
if (!strcmp(filter->filter->name, "aevalsrc")) {
|
|
deprecated = 0;
|
|
while ((p = strchr(p, ':')) && p[1] != ':') {
|
|
const char *epos = strchr(p + 1, '=');
|
|
const char *spos = strchr(p + 1, ':');
|
|
const int next_token_is_opt = epos && (!spos || epos < spos);
|
|
if (next_token_is_opt) {
|
|
p++;
|
|
break;
|
|
}
|
|
/* next token does not contain a '=', assume a channel expression */
|
|
deprecated = 1;
|
|
*p++ = '|';
|
|
}
|
|
if (p && *p == ':') { // double sep '::' found
|
|
deprecated = 1;
|
|
memmove(p, p + 1, strlen(p));
|
|
}
|
|
} else
|
|
while ((p = strchr(p, ':')))
|
|
*p++ = '|';
|
|
|
|
#if FF_API_OLD_FILTER_OPTS
|
|
if (deprecated)
|
|
av_log(filter, AV_LOG_WARNING, "This syntax is deprecated. Use "
|
|
"'|' to separate the list items.\n");
|
|
|
|
av_log(filter, AV_LOG_DEBUG, "compat: called with args=[%s]\n", copy);
|
|
ret = process_options(filter, &options, copy);
|
|
#else
|
|
if (deprecated) {
|
|
av_log(filter, AV_LOG_ERROR, "This syntax is deprecated. Use "
|
|
"'|' to separate the list items ('%s' instead of '%s')\n",
|
|
copy, args);
|
|
ret = AVERROR(EINVAL);
|
|
} else {
|
|
ret = process_options(filter, &options, copy);
|
|
}
|
|
#endif
|
|
av_freep(©);
|
|
|
|
if (ret < 0)
|
|
goto fail;
|
|
} else
|
|
#endif
|
|
{
|
|
ret = process_options(filter, &options, args);
|
|
if (ret < 0)
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
ret = avfilter_init_dict(filter, &options);
|
|
if (ret < 0)
|
|
goto fail;
|
|
|
|
if ((e = av_dict_get(options, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
|
|
av_log(filter, AV_LOG_ERROR, "No such option: %s.\n", e->key);
|
|
ret = AVERROR_OPTION_NOT_FOUND;
|
|
goto fail;
|
|
}
|
|
|
|
fail:
|
|
av_dict_free(&options);
|
|
|
|
return ret;
|
|
}
|
|
|
|
const char *avfilter_pad_get_name(const AVFilterPad *pads, int pad_idx)
|
|
{
|
|
return pads[pad_idx].name;
|
|
}
|
|
|
|
enum AVMediaType avfilter_pad_get_type(const AVFilterPad *pads, int pad_idx)
|
|
{
|
|
return pads[pad_idx].type;
|
|
}
|
|
|
|
static int default_filter_frame(AVFilterLink *link, AVFrame *frame)
|
|
{
|
|
return ff_filter_frame(link->dst->outputs[0], frame);
|
|
}
|
|
|
|
static int ff_filter_frame_framed(AVFilterLink *link, AVFrame *frame)
|
|
{
|
|
int (*filter_frame)(AVFilterLink *, AVFrame *);
|
|
AVFilterContext *dstctx = link->dst;
|
|
AVFilterPad *dst = link->dstpad;
|
|
int ret;
|
|
|
|
if (!(filter_frame = dst->filter_frame))
|
|
filter_frame = default_filter_frame;
|
|
|
|
if (dst->needs_writable) {
|
|
ret = ff_inlink_make_frame_writable(link, &frame);
|
|
if (ret < 0)
|
|
goto fail;
|
|
}
|
|
|
|
ff_inlink_process_commands(link, frame);
|
|
dstctx->is_disabled = !ff_inlink_evaluate_timeline_at_frame(link, frame);
|
|
|
|
if (dstctx->is_disabled &&
|
|
(dstctx->filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC))
|
|
filter_frame = default_filter_frame;
|
|
ret = filter_frame(link, frame);
|
|
link->frame_count_out++;
|
|
return ret;
|
|
|
|
fail:
|
|
av_frame_free(&frame);
|
|
return ret;
|
|
}
|
|
|
|
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
|
|
{
|
|
int ret;
|
|
FF_TPRINTF_START(NULL, filter_frame); ff_tlog_link(NULL, link, 1); ff_tlog(NULL, " "); ff_tlog_ref(NULL, frame, 1);
|
|
|
|
/* Consistency checks */
|
|
if (link->type == AVMEDIA_TYPE_VIDEO) {
|
|
if (strcmp(link->dst->filter->name, "buffersink") &&
|
|
strcmp(link->dst->filter->name, "format") &&
|
|
strcmp(link->dst->filter->name, "idet") &&
|
|
strcmp(link->dst->filter->name, "null") &&
|
|
strcmp(link->dst->filter->name, "scale")) {
|
|
av_assert1(frame->format == link->format);
|
|
av_assert1(frame->width == link->w);
|
|
av_assert1(frame->height == link->h);
|
|
}
|
|
} else {
|
|
if (frame->format != link->format) {
|
|
av_log(link->dst, AV_LOG_ERROR, "Format change is not supported\n");
|
|
goto error;
|
|
}
|
|
if (frame->channels != link->channels) {
|
|
av_log(link->dst, AV_LOG_ERROR, "Channel count change is not supported\n");
|
|
goto error;
|
|
}
|
|
if (frame->channel_layout != link->channel_layout) {
|
|
av_log(link->dst, AV_LOG_ERROR, "Channel layout change is not supported\n");
|
|
goto error;
|
|
}
|
|
if (frame->sample_rate != link->sample_rate) {
|
|
av_log(link->dst, AV_LOG_ERROR, "Sample rate change is not supported\n");
|
|
goto error;
|
|
}
|
|
}
|
|
|
|
link->frame_blocked_in = link->frame_wanted_out = 0;
|
|
link->frame_count_in++;
|
|
filter_unblock(link->dst);
|
|
ret = ff_framequeue_add(&link->fifo, frame);
|
|
if (ret < 0) {
|
|
av_frame_free(&frame);
|
|
return ret;
|
|
}
|
|
ff_filter_set_ready(link->dst, 300);
|
|
return 0;
|
|
|
|
error:
|
|
av_frame_free(&frame);
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
|
|
static int samples_ready(AVFilterLink *link, unsigned min)
|
|
{
|
|
return ff_framequeue_queued_frames(&link->fifo) &&
|
|
(ff_framequeue_queued_samples(&link->fifo) >= min ||
|
|
link->status_in);
|
|
}
|
|
|
|
static int take_samples(AVFilterLink *link, unsigned min, unsigned max,
|
|
AVFrame **rframe)
|
|
{
|
|
AVFrame *frame0, *frame, *buf;
|
|
unsigned nb_samples, nb_frames, i, p;
|
|
int ret;
|
|
|
|
/* Note: this function relies on no format changes and must only be
|
|
called with enough samples. */
|
|
av_assert1(samples_ready(link, link->min_samples));
|
|
frame0 = frame = ff_framequeue_peek(&link->fifo, 0);
|
|
if (frame->nb_samples >= min && frame->nb_samples < max) {
|
|
*rframe = ff_framequeue_take(&link->fifo);
|
|
return 0;
|
|
}
|
|
nb_frames = 0;
|
|
nb_samples = 0;
|
|
while (1) {
|
|
if (nb_samples + frame->nb_samples > max) {
|
|
if (nb_samples < min)
|
|
nb_samples = max;
|
|
break;
|
|
}
|
|
nb_samples += frame->nb_samples;
|
|
nb_frames++;
|
|
if (nb_frames == ff_framequeue_queued_frames(&link->fifo))
|
|
break;
|
|
frame = ff_framequeue_peek(&link->fifo, nb_frames);
|
|
}
|
|
|
|
buf = ff_get_audio_buffer(link, nb_samples);
|
|
if (!buf)
|
|
return AVERROR(ENOMEM);
|
|
ret = av_frame_copy_props(buf, frame0);
|
|
if (ret < 0) {
|
|
av_frame_free(&buf);
|
|
return ret;
|
|
}
|
|
buf->pts = frame0->pts;
|
|
|
|
p = 0;
|
|
for (i = 0; i < nb_frames; i++) {
|
|
frame = ff_framequeue_take(&link->fifo);
|
|
av_samples_copy(buf->extended_data, frame->extended_data, p, 0,
|
|
frame->nb_samples, link->channels, link->format);
|
|
p += frame->nb_samples;
|
|
av_frame_free(&frame);
|
|
}
|
|
if (p < nb_samples) {
|
|
unsigned n = nb_samples - p;
|
|
frame = ff_framequeue_peek(&link->fifo, 0);
|
|
av_samples_copy(buf->extended_data, frame->extended_data, p, 0, n,
|
|
link->channels, link->format);
|
|
ff_framequeue_skip_samples(&link->fifo, n, link->time_base);
|
|
}
|
|
|
|
*rframe = buf;
|
|
return 0;
|
|
}
|
|
|
|
static int ff_filter_frame_to_filter(AVFilterLink *link)
|
|
{
|
|
AVFrame *frame = NULL;
|
|
AVFilterContext *dst = link->dst;
|
|
int ret;
|
|
|
|
av_assert1(ff_framequeue_queued_frames(&link->fifo));
|
|
ret = link->min_samples ?
|
|
ff_inlink_consume_samples(link, link->min_samples, link->max_samples, &frame) :
|
|
ff_inlink_consume_frame(link, &frame);
|
|
av_assert1(ret);
|
|
if (ret < 0) {
|
|
av_assert1(!frame);
|
|
return ret;
|
|
}
|
|
/* The filter will soon have received a new frame, that may allow it to
|
|
produce one or more: unblock its outputs. */
|
|
filter_unblock(dst);
|
|
/* AVFilterPad.filter_frame() expect frame_count_out to have the value
|
|
before the frame; ff_filter_frame_framed() will re-increment it. */
|
|
link->frame_count_out--;
|
|
ret = ff_filter_frame_framed(link, frame);
|
|
if (ret < 0 && ret != link->status_out) {
|
|
ff_avfilter_link_set_out_status(link, ret, AV_NOPTS_VALUE);
|
|
} else {
|
|
/* Run once again, to see if several frames were available, or if
|
|
the input status has also changed, or any other reason. */
|
|
ff_filter_set_ready(dst, 300);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int forward_status_change(AVFilterContext *filter, AVFilterLink *in)
|
|
{
|
|
unsigned out = 0, progress = 0;
|
|
int ret;
|
|
|
|
av_assert0(!in->status_out);
|
|
if (!filter->nb_outputs) {
|
|
/* not necessary with the current API and sinks */
|
|
return 0;
|
|
}
|
|
while (!in->status_out) {
|
|
if (!filter->outputs[out]->status_in) {
|
|
progress++;
|
|
ret = ff_request_frame_to_filter(filter->outputs[out]);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
if (++out == filter->nb_outputs) {
|
|
if (!progress) {
|
|
/* Every output already closed: input no longer interesting
|
|
(example: overlay in shortest mode, other input closed). */
|
|
ff_avfilter_link_set_out_status(in, in->status_in, in->status_in_pts);
|
|
return 0;
|
|
}
|
|
progress = 0;
|
|
out = 0;
|
|
}
|
|
}
|
|
ff_filter_set_ready(filter, 200);
|
|
return 0;
|
|
}
|
|
|
|
#define FFERROR_NOT_READY FFERRTAG('N','R','D','Y')
|
|
|
|
static int ff_filter_activate_default(AVFilterContext *filter)
|
|
{
|
|
unsigned i;
|
|
|
|
for (i = 0; i < filter->nb_inputs; i++) {
|
|
if (samples_ready(filter->inputs[i], filter->inputs[i]->min_samples)) {
|
|
return ff_filter_frame_to_filter(filter->inputs[i]);
|
|
}
|
|
}
|
|
for (i = 0; i < filter->nb_inputs; i++) {
|
|
if (filter->inputs[i]->status_in && !filter->inputs[i]->status_out) {
|
|
av_assert1(!ff_framequeue_queued_frames(&filter->inputs[i]->fifo));
|
|
return forward_status_change(filter, filter->inputs[i]);
|
|
}
|
|
}
|
|
for (i = 0; i < filter->nb_outputs; i++) {
|
|
if (filter->outputs[i]->frame_wanted_out &&
|
|
!filter->outputs[i]->frame_blocked_in) {
|
|
return ff_request_frame_to_filter(filter->outputs[i]);
|
|
}
|
|
}
|
|
return FFERROR_NOT_READY;
|
|
}
|
|
|
|
/*
|
|
Filter scheduling and activation
|
|
|
|
When a filter is activated, it must:
|
|
- if possible, output a frame;
|
|
- else, if relevant, forward the input status change;
|
|
- else, check outputs for wanted frames and forward the requests.
|
|
|
|
The following AVFilterLink fields are used for activation:
|
|
|
|
- frame_wanted_out:
|
|
|
|
This field indicates if a frame is needed on this input of the
|
|
destination filter. A positive value indicates that a frame is needed
|
|
to process queued frames or internal data or to satisfy the
|
|
application; a zero value indicates that a frame is not especially
|
|
needed but could be processed anyway; a negative value indicates that a
|
|
frame would just be queued.
|
|
|
|
It is set by filters using ff_request_frame() or ff_request_no_frame(),
|
|
when requested by the application through a specific API or when it is
|
|
set on one of the outputs.
|
|
|
|
It is cleared when a frame is sent from the source using
|
|
ff_filter_frame().
|
|
|
|
It is also cleared when a status change is sent from the source using
|
|
ff_avfilter_link_set_in_status().
|
|
|
|
- frame_blocked_in:
|
|
|
|
This field means that the source filter can not generate a frame as is.
|
|
Its goal is to avoid repeatedly calling the request_frame() method on
|
|
the same link.
|
|
|
|
It is set by the framework on all outputs of a filter before activating it.
|
|
|
|
It is automatically cleared by ff_filter_frame().
|
|
|
|
It is also automatically cleared by ff_avfilter_link_set_in_status().
|
|
|
|
It is also cleared on all outputs (using filter_unblock()) when
|
|
something happens on an input: processing a frame or changing the
|
|
status.
|
|
|
|
- fifo:
|
|
|
|
Contains the frames queued on a filter input. If it contains frames and
|
|
frame_wanted_out is not set, then the filter can be activated. If that
|
|
result in the filter not able to use these frames, the filter must set
|
|
frame_wanted_out to ask for more frames.
|
|
|
|
- status_in and status_in_pts:
|
|
|
|
Status (EOF or error code) of the link and timestamp of the status
|
|
change (in link time base, same as frames) as seen from the input of
|
|
the link. The status change is considered happening after the frames
|
|
queued in fifo.
|
|
|
|
It is set by the source filter using ff_avfilter_link_set_in_status().
|
|
|
|
- status_out:
|
|
|
|
Status of the link as seen from the output of the link. The status
|
|
change is considered having already happened.
|
|
|
|
It is set by the destination filter using
|
|
ff_avfilter_link_set_out_status().
|
|
|
|
Filters are activated according to the ready field, set using the
|
|
ff_filter_set_ready(). Eventually, a priority queue will be used.
|
|
ff_filter_set_ready() is called whenever anything could cause progress to
|
|
be possible. Marking a filter ready when it is not is not a problem,
|
|
except for the small overhead it causes.
|
|
|
|
Conditions that cause a filter to be marked ready are:
|
|
|
|
- frames added on an input link;
|
|
|
|
- changes in the input or output status of an input link;
|
|
|
|
- requests for a frame on an output link;
|
|
|
|
- after any actual processing using the legacy methods (filter_frame(),
|
|
and request_frame() to acknowledge status changes), to run once more
|
|
and check if enough input was present for several frames.
|
|
|
|
Exemples of scenarios to consider:
|
|
|
|
- buffersrc: activate if frame_wanted_out to notify the application;
|
|
activate when the application adds a frame to push it immediately.
|
|
|
|
- testsrc: activate only if frame_wanted_out to produce and push a frame.
|
|
|
|
- concat (not at stitch points): can process a frame on any output.
|
|
Activate if frame_wanted_out on output to forward on the corresponding
|
|
input. Activate when a frame is present on input to process it
|
|
immediately.
|
|
|
|
- framesync: needs at least one frame on each input; extra frames on the
|
|
wrong input will accumulate. When a frame is first added on one input,
|
|
set frame_wanted_out<0 on it to avoid getting more (would trigger
|
|
testsrc) and frame_wanted_out>0 on the other to allow processing it.
|
|
|
|
Activation of old filters:
|
|
|
|
In order to activate a filter implementing the legacy filter_frame() and
|
|
request_frame() methods, perform the first possible of the following
|
|
actions:
|
|
|
|
- If an input has frames in fifo and frame_wanted_out == 0, dequeue a
|
|
frame and call filter_frame().
|
|
|
|
Ratinale: filter frames as soon as possible instead of leaving them
|
|
queued; frame_wanted_out < 0 is not possible since the old API does not
|
|
set it nor provides any similar feedback; frame_wanted_out > 0 happens
|
|
when min_samples > 0 and there are not enough samples queued.
|
|
|
|
- If an input has status_in set but not status_out, try to call
|
|
request_frame() on one of the outputs in the hope that it will trigger
|
|
request_frame() on the input with status_in and acknowledge it. This is
|
|
awkward and fragile, filters with several inputs or outputs should be
|
|
updated to direct activation as soon as possible.
|
|
|
|
- If an output has frame_wanted_out > 0 and not frame_blocked_in, call
|
|
request_frame().
|
|
|
|
Rationale: checking frame_blocked_in is necessary to avoid requesting
|
|
repeatedly on a blocked input if another is not blocked (example:
|
|
[buffersrc1][testsrc1][buffersrc2][testsrc2]concat=v=2).
|
|
|
|
TODO: respect needs_fifo and remove auto-inserted fifos.
|
|
|
|
*/
|
|
|
|
int ff_filter_activate(AVFilterContext *filter)
|
|
{
|
|
int ret;
|
|
|
|
/* Generic timeline support is not yet implemented but should be easy */
|
|
av_assert1(!(filter->filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC &&
|
|
filter->filter->activate));
|
|
filter->ready = 0;
|
|
ret = filter->filter->activate ? filter->filter->activate(filter) :
|
|
ff_filter_activate_default(filter);
|
|
if (ret == FFERROR_NOT_READY)
|
|
ret = 0;
|
|
return ret;
|
|
}
|
|
|
|
int ff_inlink_acknowledge_status(AVFilterLink *link, int *rstatus, int64_t *rpts)
|
|
{
|
|
*rpts = link->current_pts;
|
|
if (ff_framequeue_queued_frames(&link->fifo))
|
|
return *rstatus = 0;
|
|
if (link->status_out)
|
|
return *rstatus = link->status_out;
|
|
if (!link->status_in)
|
|
return *rstatus = 0;
|
|
*rstatus = link->status_out = link->status_in;
|
|
ff_update_link_current_pts(link, link->status_in_pts);
|
|
*rpts = link->current_pts;
|
|
return 1;
|
|
}
|
|
|
|
int ff_inlink_check_available_frame(AVFilterLink *link)
|
|
{
|
|
return ff_framequeue_queued_frames(&link->fifo) > 0;
|
|
}
|
|
|
|
int ff_inlink_check_available_samples(AVFilterLink *link, unsigned min)
|
|
{
|
|
uint64_t samples = ff_framequeue_queued_samples(&link->fifo);
|
|
av_assert1(min);
|
|
return samples >= min || (link->status_in && samples);
|
|
}
|
|
|
|
static void consume_update(AVFilterLink *link, const AVFrame *frame)
|
|
{
|
|
ff_update_link_current_pts(link, frame->pts);
|
|
ff_inlink_process_commands(link, frame);
|
|
link->dst->is_disabled = !ff_inlink_evaluate_timeline_at_frame(link, frame);
|
|
link->frame_count_out++;
|
|
}
|
|
|
|
int ff_inlink_consume_frame(AVFilterLink *link, AVFrame **rframe)
|
|
{
|
|
AVFrame *frame;
|
|
|
|
*rframe = NULL;
|
|
if (!ff_inlink_check_available_frame(link))
|
|
return 0;
|
|
frame = ff_framequeue_take(&link->fifo);
|
|
consume_update(link, frame);
|
|
*rframe = frame;
|
|
return 1;
|
|
}
|
|
|
|
int ff_inlink_consume_samples(AVFilterLink *link, unsigned min, unsigned max,
|
|
AVFrame **rframe)
|
|
{
|
|
AVFrame *frame;
|
|
int ret;
|
|
|
|
av_assert1(min);
|
|
*rframe = NULL;
|
|
if (!ff_inlink_check_available_samples(link, min))
|
|
return 0;
|
|
if (link->status_in)
|
|
min = FFMIN(min, ff_framequeue_queued_samples(&link->fifo));
|
|
ret = take_samples(link, min, link->max_samples, &frame);
|
|
if (ret < 0)
|
|
return ret;
|
|
consume_update(link, frame);
|
|
*rframe = frame;
|
|
return 1;
|
|
}
|
|
|
|
int ff_inlink_make_frame_writable(AVFilterLink *link, AVFrame **rframe)
|
|
{
|
|
AVFrame *frame = *rframe;
|
|
AVFrame *out;
|
|
int ret;
|
|
|
|
if (av_frame_is_writable(frame))
|
|
return 0;
|
|
av_log(link->dst, AV_LOG_DEBUG, "Copying data in avfilter.\n");
|
|
|
|
switch (link->type) {
|
|
case AVMEDIA_TYPE_VIDEO:
|
|
out = ff_get_video_buffer(link, link->w, link->h);
|
|
break;
|
|
case AVMEDIA_TYPE_AUDIO:
|
|
out = ff_get_audio_buffer(link, frame->nb_samples);
|
|
break;
|
|
default:
|
|
return AVERROR(EINVAL);
|
|
}
|
|
if (!out)
|
|
return AVERROR(ENOMEM);
|
|
|
|
ret = av_frame_copy_props(out, frame);
|
|
if (ret < 0) {
|
|
av_frame_free(&out);
|
|
return ret;
|
|
}
|
|
|
|
switch (link->type) {
|
|
case AVMEDIA_TYPE_VIDEO:
|
|
av_image_copy(out->data, out->linesize, (const uint8_t **)frame->data, frame->linesize,
|
|
frame->format, frame->width, frame->height);
|
|
break;
|
|
case AVMEDIA_TYPE_AUDIO:
|
|
av_samples_copy(out->extended_data, frame->extended_data,
|
|
0, 0, frame->nb_samples,
|
|
frame->channels,
|
|
frame->format);
|
|
break;
|
|
default:
|
|
av_assert0(!"reached");
|
|
}
|
|
|
|
av_frame_free(&frame);
|
|
*rframe = out;
|
|
return 0;
|
|
}
|
|
|
|
int ff_inlink_process_commands(AVFilterLink *link, const AVFrame *frame)
|
|
{
|
|
AVFilterCommand *cmd = link->dst->command_queue;
|
|
|
|
while(cmd && cmd->time <= frame->pts * av_q2d(link->time_base)){
|
|
av_log(link->dst, AV_LOG_DEBUG,
|
|
"Processing command time:%f command:%s arg:%s\n",
|
|
cmd->time, cmd->command, cmd->arg);
|
|
avfilter_process_command(link->dst, cmd->command, cmd->arg, 0, 0, cmd->flags);
|
|
ff_command_queue_pop(link->dst);
|
|
cmd= link->dst->command_queue;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int ff_inlink_evaluate_timeline_at_frame(AVFilterLink *link, const AVFrame *frame)
|
|
{
|
|
AVFilterContext *dstctx = link->dst;
|
|
int64_t pts = frame->pts;
|
|
int64_t pos = frame->pkt_pos;
|
|
|
|
if (!dstctx->enable_str)
|
|
return 1;
|
|
|
|
dstctx->var_values[VAR_N] = link->frame_count_out;
|
|
dstctx->var_values[VAR_T] = pts == AV_NOPTS_VALUE ? NAN : pts * av_q2d(link->time_base);
|
|
dstctx->var_values[VAR_W] = link->w;
|
|
dstctx->var_values[VAR_H] = link->h;
|
|
dstctx->var_values[VAR_POS] = pos == -1 ? NAN : pos;
|
|
|
|
return fabs(av_expr_eval(dstctx->enable, dstctx->var_values, NULL)) >= 0.5;
|
|
}
|
|
|
|
void ff_inlink_request_frame(AVFilterLink *link)
|
|
{
|
|
av_assert1(!link->status_in);
|
|
av_assert1(!link->status_out);
|
|
link->frame_wanted_out = 1;
|
|
ff_filter_set_ready(link->src, 100);
|
|
}
|
|
|
|
const AVClass *avfilter_get_class(void)
|
|
{
|
|
return &avfilter_class;
|
|
}
|