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https://github.com/FFmpeg/FFmpeg.git
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ecc8dada37
The struct is going to be used for storing audio buffer references as well, and the new name is more generic. Patch by S.N. Hemanth Meenakshisundaram @smeenaks@ucsd@edu@. Originally committed as revision 24730 to svn://svn.ffmpeg.org/ffmpeg/trunk
467 lines
14 KiB
C
467 lines
14 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 "libavcodec/imgconvert.h"
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#include "libavutil/pixdesc.h"
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#include "avfilter.h"
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#include "internal.h"
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unsigned avfilter_version(void) {
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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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/** helper macros to get the in/out pad on the dst/src filter */
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#define link_dpad(link) link->dst-> input_pads[link->dstpad]
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#define link_spad(link) link->src->output_pads[link->srcpad]
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AVFilterBufferRef *avfilter_ref_pic(AVFilterBufferRef *ref, int pmask)
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{
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AVFilterBufferRef *ret = av_malloc(sizeof(AVFilterBufferRef));
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*ret = *ref;
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ret->perms &= pmask;
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ret->pic->refcount ++;
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return ret;
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}
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void avfilter_unref_pic(AVFilterBufferRef *ref)
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{
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if(!(--ref->pic->refcount))
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ref->pic->free(ref->pic);
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av_free(ref);
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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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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 = srcpad;
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link->dstpad = dstpad;
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link->type = src->output_pads[srcpad].type;
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assert(PIX_FMT_NONE == -1 && 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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int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
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unsigned in, unsigned out)
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{
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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[link->dstpad] = NULL;
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if(avfilter_link(filt, out, link->dst, link->dstpad)) {
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/* failed to link output filter to new filter */
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link->dst->inputs[link->dstpad] = link;
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return -1;
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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 = in;
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filt->inputs[in] = 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[out]->out_formats);
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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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for(i = 0; i < filter->input_count; i ++) {
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AVFilterLink *link = filter->inputs[i];
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if(!link) continue;
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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(avfilter_config_links(link->src))
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return -1;
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if(!(config_link = link_spad(link).config_props))
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config_link = avfilter_default_config_output_link;
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if(config_link(link))
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return -1;
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if((config_link = link_dpad(link).config_props))
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if(config_link(link))
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return -1;
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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_dprintf_picref(void *ctx, AVFilterBufferRef *picref, int end)
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{
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dprintf(ctx,
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"picref[%p data[%p, %p, %p, %p] linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64" a:%d/%d s:%dx%d]%s",
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picref,
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picref->data [0], picref->data [1], picref->data [2], picref->data [3],
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picref->linesize[0], picref->linesize[1], picref->linesize[2], picref->linesize[3],
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picref->pts, picref->pos,
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picref->pixel_aspect.num, picref->pixel_aspect.den, picref->w, picref->h,
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end ? "\n" : "");
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}
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void ff_dprintf_link(void *ctx, AVFilterLink *link, int end)
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{
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dprintf(ctx,
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"link[%p s:%dx%d fmt:%-16s %-16s->%-16s]%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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}
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AVFilterBufferRef *avfilter_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
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{
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AVFilterBufferRef *ret = NULL;
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FF_DPRINTF_START(NULL, get_video_buffer); ff_dprintf_link(NULL, link, 0); dprintf(NULL, " perms:%d w:%d h:%d\n", perms, w, h);
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if(link_dpad(link).get_video_buffer)
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ret = link_dpad(link).get_video_buffer(link, perms, w, h);
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if(!ret)
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ret = avfilter_default_get_video_buffer(link, perms, w, h);
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FF_DPRINTF_START(NULL, get_video_buffer); ff_dprintf_link(NULL, link, 0); dprintf(NULL, " returning "); ff_dprintf_picref(NULL, ret, 1);
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return ret;
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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_dprintf_link(NULL, link, 1);
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if(link_spad(link).request_frame)
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return link_spad(link).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_spad(link).poll_frame)
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return link_spad(link).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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/* XXX: should we do the duplicating of the picture ref here, instead of
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* forcing the source filter to do it? */
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void avfilter_start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
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{
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void (*start_frame)(AVFilterLink *, AVFilterBufferRef *);
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AVFilterPad *dst = &link_dpad(link);
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FF_DPRINTF_START(NULL, start_frame); ff_dprintf_link(NULL, link, 0); dprintf(NULL, " "); ff_dprintf_picref(NULL, picref, 1);
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if(!(start_frame = dst->start_frame))
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start_frame = avfilter_default_start_frame;
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/* prepare to copy the picture if it has insufficient permissions */
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if((dst->min_perms & picref->perms) != dst->min_perms ||
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dst->rej_perms & picref->perms) {
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/*
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av_log(link->dst, AV_LOG_INFO,
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"frame copy needed (have perms %x, need %x, reject %x)\n",
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picref->perms,
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link_dpad(link).min_perms, link_dpad(link).rej_perms);
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*/
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link->cur_pic = avfilter_default_get_video_buffer(link, dst->min_perms, link->w, link->h);
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link->srcpic = picref;
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avfilter_copy_picref_props(link->cur_pic, link->srcpic);
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}
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else
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link->cur_pic = picref;
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start_frame(link, link->cur_pic);
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}
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void avfilter_end_frame(AVFilterLink *link)
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{
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void (*end_frame)(AVFilterLink *);
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if(!(end_frame = link_dpad(link).end_frame))
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end_frame = avfilter_default_end_frame;
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end_frame(link);
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/* unreference the source picture if we're feeding the destination filter
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* a copied version dues to permission issues */
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if(link->srcpic) {
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avfilter_unref_pic(link->srcpic);
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link->srcpic = NULL;
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}
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}
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void avfilter_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
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{
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uint8_t *src[4], *dst[4];
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int i, j, vsub;
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void (*draw_slice)(AVFilterLink *, int, int, int);
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FF_DPRINTF_START(NULL, draw_slice); ff_dprintf_link(NULL, link, 0); dprintf(NULL, " y:%d h:%d dir:%d\n", y, h, slice_dir);
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/* copy the slice if needed for permission reasons */
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if(link->srcpic) {
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vsub = av_pix_fmt_descriptors[link->format].log2_chroma_h;
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for(i = 0; i < 4; i ++) {
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if(link->srcpic->data[i]) {
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src[i] = link->srcpic-> data[i] +
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(y >> (i==0 ? 0 : vsub)) * link->srcpic-> linesize[i];
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dst[i] = link->cur_pic->data[i] +
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(y >> (i==0 ? 0 : vsub)) * link->cur_pic->linesize[i];
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} else
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src[i] = dst[i] = NULL;
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}
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for(i = 0; i < 4; i ++) {
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int planew =
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ff_get_plane_bytewidth(link->format, link->cur_pic->w, i);
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if(!src[i]) continue;
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for(j = 0; j < h >> (i==0 ? 0 : vsub); j ++) {
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memcpy(dst[i], src[i], planew);
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src[i] += link->srcpic ->linesize[i];
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dst[i] += link->cur_pic->linesize[i];
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}
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}
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}
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if(!(draw_slice = link_dpad(link).draw_slice))
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draw_slice = avfilter_default_draw_slice;
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draw_slice(link, y, h, slice_dir);
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}
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#define MAX_REGISTERED_AVFILTERS_NB 64
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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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return -1;
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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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AVFilterContext *avfilter_open(AVFilter *filter, const char *inst_name)
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{
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AVFilterContext *ret;
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if (!filter)
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return 0;
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ret = av_mallocz(sizeof(AVFilterContext));
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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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ret->priv = av_mallocz(filter->priv_size);
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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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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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}
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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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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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}
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return ret;
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}
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void avfilter_destroy(AVFilterContext *filter)
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{
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int i;
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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(filter->inputs[i]) {
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if (filter->inputs[i]->src)
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filter->inputs[i]->src->outputs[filter->inputs[i]->srcpad] = NULL;
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avfilter_formats_unref(&filter->inputs[i]->in_formats);
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avfilter_formats_unref(&filter->inputs[i]->out_formats);
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}
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av_freep(&filter->inputs[i]);
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}
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for(i = 0; i < filter->output_count; i ++) {
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if(filter->outputs[i]) {
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if (filter->outputs[i]->dst)
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filter->outputs[i]->dst->inputs[filter->outputs[i]->dstpad] = NULL;
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avfilter_formats_unref(&filter->outputs[i]->in_formats);
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avfilter_formats_unref(&filter->outputs[i]->out_formats);
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}
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av_freep(&filter->outputs[i]);
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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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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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