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496 lines
15 KiB
496 lines
15 KiB
/* |
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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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|
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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 (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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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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.class_name = "AVFilter", |
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.item_name = filter_name, |
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.version = 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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|
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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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