4d4098da00
The planar/packed switch and the packing_formats list is no longer required, since the planar/packed information is now stored in the sample format enum. This is technically a major API break, possibly it should be not too painful as we marked the audio filtering API as unstable.
500 lines
15 KiB
C
500 lines
15 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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/* #define DEBUG */
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#include "libavutil/pixdesc.h"
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#include "libavutil/rational.h"
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#include "libavutil/audioconvert.h"
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#include "libavutil/avassert.h"
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#include "libavutil/avstring.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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unsigned avfilter_version(void) {
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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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void avfilter_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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unsigned i;
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idx = FFMIN(idx, *count);
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*pads = av_realloc(*pads, sizeof(AVFilterPad) * (*count + 1));
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*links = av_realloc(*links, sizeof(AVFilterLink*) * (*count + 1));
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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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}
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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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if (src->output_count <= srcpad || dst->input_count <= dstpad ||
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src->outputs[srcpad] || dst->inputs[dstpad])
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return -1;
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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 and the '%s' filter input pad %d\n",
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src->name, srcpad, dst->name, dstpad);
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return AVERROR(EINVAL);
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}
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src->outputs[srcpad] =
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dst-> inputs[dstpad] = link = av_mallocz(sizeof(AVFilterLink));
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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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assert(PIX_FMT_NONE == -1 && AV_SAMPLE_FMT_NONE == -1);
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link->format = -1;
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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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if ((*link)->pool)
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ff_free_pool((*link)->pool);
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av_freep(link);
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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_INFO, "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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avfilter_formats_changeref(&link->out_formats,
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&filt->outputs[filt_dstpad_idx]->out_formats);
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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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if (link->out_samplerates)
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avfilter_formats_changeref(&link->out_samplerates,
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&filt->outputs[filt_dstpad_idx]->out_samplerates);
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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->input_count; i ++) {
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AVFilterLink *link = filter->inputs[i];
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AVFilterLink *inlink = link->src->input_count ?
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link->src->inputs[0] : NULL;
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if (!link) continue;
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link->current_pts = 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->input_count != 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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return ret;
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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 1
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if (inlink) {
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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->sample_rate)
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link->sample_rate = inlink->sample_rate;
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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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} else if (!link->sample_rate) {
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av_log(link->src, AV_LOG_ERROR,
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"Audio source filters must set their output link's "
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"sample_rate\n");
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return AVERROR(EINVAL);
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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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#endif
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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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return ret;
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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_dlog_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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av_dlog(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_pix_fmt_descriptors[link->format].name,
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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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av_dlog(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 avfilter_request_frame(AVFilterLink *link)
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{
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FF_DPRINTF_START(NULL, request_frame); ff_dlog_link(NULL, link, 1);
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if (link->srcpad->request_frame)
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return link->srcpad->request_frame(link);
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else if (link->src->inputs[0])
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return avfilter_request_frame(link->src->inputs[0]);
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else return -1;
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}
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int avfilter_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->input_count; i++) {
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int val;
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if (!link->src->inputs[i])
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return -1;
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val = avfilter_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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void ff_update_link_current_pts(AVFilterLink *link, int64_t pts)
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{
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if (pts == AV_NOPTS_VALUE)
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return;
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link->current_pts = pts; /* TODO use duration */
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if (link->graph && link->age_index >= 0)
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ff_avfilter_graph_update_heap(link->graph, link);
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}
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int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
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{
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if(!strcmp(cmd, "ping")){
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av_strlcatf(res, res_len, "pong from:%s %s\n", filter->filter->name, filter->name);
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return 0;
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}else if(filter->filter->process_command) {
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return filter->filter->process_command(filter, cmd, arg, res, res_len, flags);
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}
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return AVERROR(ENOSYS);
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}
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#define MAX_REGISTERED_AVFILTERS_NB 128
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static AVFilter *registered_avfilters[MAX_REGISTERED_AVFILTERS_NB + 1];
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static int next_registered_avfilter_idx = 0;
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AVFilter *avfilter_get_by_name(const char *name)
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{
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int i;
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for (i = 0; registered_avfilters[i]; i++)
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if (!strcmp(registered_avfilters[i]->name, name))
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return registered_avfilters[i];
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return NULL;
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}
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int avfilter_register(AVFilter *filter)
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{
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if (next_registered_avfilter_idx == MAX_REGISTERED_AVFILTERS_NB) {
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av_log(NULL, AV_LOG_ERROR,
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"Maximum number of registered filters %d reached, "
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"impossible to register filter with name '%s'\n",
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MAX_REGISTERED_AVFILTERS_NB, filter->name);
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return AVERROR(ENOMEM);
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}
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registered_avfilters[next_registered_avfilter_idx++] = filter;
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return 0;
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}
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AVFilter **av_filter_next(AVFilter **filter)
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{
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return filter ? ++filter : ®istered_avfilters[0];
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}
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void avfilter_uninit(void)
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{
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memset(registered_avfilters, 0, sizeof(registered_avfilters));
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next_registered_avfilter_idx = 0;
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}
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static int pad_count(const AVFilterPad *pads)
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{
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int count;
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for(count = 0; pads->name; count ++) pads ++;
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return count;
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}
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static const char *filter_name(void *p)
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{
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AVFilterContext *filter = p;
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return filter->filter->name;
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}
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static const AVClass avfilter_class = {
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"AVFilter",
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filter_name,
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NULL,
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LIBAVUTIL_VERSION_INT,
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};
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int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
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{
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AVFilterContext *ret;
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*filter_ctx = NULL;
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if (!filter)
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return AVERROR(EINVAL);
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ret = av_mallocz(sizeof(AVFilterContext));
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if (!ret)
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return AVERROR(ENOMEM);
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ret->av_class = &avfilter_class;
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ret->filter = filter;
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ret->name = inst_name ? av_strdup(inst_name) : NULL;
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if (filter->priv_size) {
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ret->priv = av_mallocz(filter->priv_size);
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if (!ret->priv)
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goto err;
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}
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ret->input_count = pad_count(filter->inputs);
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if (ret->input_count) {
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ret->input_pads = av_malloc(sizeof(AVFilterPad) * ret->input_count);
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if (!ret->input_pads)
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goto err;
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memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->input_count);
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ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->input_count);
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if (!ret->inputs)
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goto err;
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}
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ret->output_count = pad_count(filter->outputs);
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if (ret->output_count) {
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ret->output_pads = av_malloc(sizeof(AVFilterPad) * ret->output_count);
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if (!ret->output_pads)
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goto err;
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memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->output_count);
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ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->output_count);
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if (!ret->outputs)
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goto err;
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}
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*filter_ctx = ret;
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return 0;
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err:
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av_freep(&ret->inputs);
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av_freep(&ret->input_pads);
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ret->input_count = 0;
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av_freep(&ret->outputs);
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av_freep(&ret->output_pads);
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ret->output_count = 0;
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av_freep(&ret->priv);
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av_free(ret);
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return AVERROR(ENOMEM);
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}
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void avfilter_free(AVFilterContext *filter)
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{
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int i;
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AVFilterLink *link;
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if (!filter)
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return;
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if (filter->filter->uninit)
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filter->filter->uninit(filter);
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for (i = 0; i < filter->input_count; i++) {
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if ((link = filter->inputs[i])) {
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if (link->src)
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link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
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avfilter_formats_unref(&link->in_formats);
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avfilter_formats_unref(&link->out_formats);
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avfilter_formats_unref(&link->in_samplerates);
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avfilter_formats_unref(&link->out_samplerates);
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ff_channel_layouts_unref(&link->in_channel_layouts);
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ff_channel_layouts_unref(&link->out_channel_layouts);
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}
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avfilter_link_free(&link);
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}
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for (i = 0; i < filter->output_count; i++) {
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if ((link = filter->outputs[i])) {
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if (link->dst)
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link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
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avfilter_formats_unref(&link->in_formats);
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avfilter_formats_unref(&link->out_formats);
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avfilter_formats_unref(&link->in_samplerates);
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avfilter_formats_unref(&link->out_samplerates);
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ff_channel_layouts_unref(&link->in_channel_layouts);
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ff_channel_layouts_unref(&link->out_channel_layouts);
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}
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avfilter_link_free(&link);
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}
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av_freep(&filter->name);
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av_freep(&filter->input_pads);
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av_freep(&filter->output_pads);
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av_freep(&filter->inputs);
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av_freep(&filter->outputs);
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av_freep(&filter->priv);
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while(filter->command_queue){
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ff_command_queue_pop(filter);
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}
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av_free(filter);
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}
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int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
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{
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int ret=0;
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if (filter->filter->init)
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ret = filter->filter->init(filter, args, opaque);
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return ret;
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}
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