mirror of
https://github.com/xenia-project/FFmpeg.git
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358 lines
11 KiB
C
358 lines
11 KiB
C
/*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/imgutils.h"
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#include "avfilter.h"
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#include "internal.h"
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#include "video.h"
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#ifdef DEBUG
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static char *ff_get_ref_perms_string(char *buf, size_t buf_size, int perms)
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{
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snprintf(buf, buf_size, "%s%s%s%s%s%s",
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perms & AV_PERM_READ ? "r" : "",
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perms & AV_PERM_WRITE ? "w" : "",
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perms & AV_PERM_PRESERVE ? "p" : "",
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perms & AV_PERM_REUSE ? "u" : "",
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perms & AV_PERM_REUSE2 ? "U" : "",
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perms & AV_PERM_NEG_LINESIZES ? "n" : "");
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return buf;
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}
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#endif
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static void ff_dlog_ref(void *ctx, AVFilterBufferRef *ref, int end)
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{
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av_unused char buf[16];
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av_dlog(ctx,
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"ref[%p buf:%p refcount:%d perms:%s data:%p linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64,
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ref, ref->buf, ref->buf->refcount, ff_get_ref_perms_string(buf, sizeof(buf), ref->perms), ref->data[0],
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ref->linesize[0], ref->linesize[1], ref->linesize[2], ref->linesize[3],
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ref->pts, ref->pos);
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if (ref->video) {
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av_dlog(ctx, " a:%d/%d s:%dx%d i:%c iskey:%d type:%c",
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ref->video->pixel_aspect.num, ref->video->pixel_aspect.den,
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ref->video->w, ref->video->h,
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!ref->video->interlaced ? 'P' : /* Progressive */
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ref->video->top_field_first ? 'T' : 'B', /* Top / Bottom */
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ref->video->key_frame,
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av_get_picture_type_char(ref->video->pict_type));
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}
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if (ref->audio) {
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av_dlog(ctx, " cl:%"PRId64"d n:%d r:%d p:%d",
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ref->audio->channel_layout,
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ref->audio->nb_samples,
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ref->audio->sample_rate,
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ref->audio->planar);
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}
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av_dlog(ctx, "]%s", end ? "\n" : "");
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}
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AVFilterBufferRef *ff_null_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
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{
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return avfilter_get_video_buffer(link->dst->outputs[0], perms, w, h);
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}
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/* TODO: set the buffer's priv member to a context structure for the whole
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* filter chain. This will allow for a buffer pool instead of the constant
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* alloc & free cycle currently implemented. */
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AVFilterBufferRef *ff_default_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
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{
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int linesize[4];
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uint8_t *data[4];
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AVFilterBufferRef *picref = NULL;
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// +2 is needed for swscaler, +16 to be SIMD-friendly
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if (av_image_alloc(data, linesize, w, h, link->format, 16) < 0)
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return NULL;
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picref = avfilter_get_video_buffer_ref_from_arrays(data, linesize,
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perms, w, h, link->format);
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if (!picref) {
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av_free(data[0]);
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return NULL;
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}
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return picref;
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}
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AVFilterBufferRef *
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avfilter_get_video_buffer_ref_from_arrays(uint8_t *data[4], int linesize[4], int perms,
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int w, int h, enum PixelFormat format)
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{
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AVFilterBuffer *pic = av_mallocz(sizeof(AVFilterBuffer));
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AVFilterBufferRef *picref = av_mallocz(sizeof(AVFilterBufferRef));
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if (!pic || !picref)
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goto fail;
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picref->buf = pic;
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picref->buf->free = ff_avfilter_default_free_buffer;
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if (!(picref->video = av_mallocz(sizeof(AVFilterBufferRefVideoProps))))
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goto fail;
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pic->w = picref->video->w = w;
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pic->h = picref->video->h = h;
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/* make sure the buffer gets read permission or it's useless for output */
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picref->perms = perms | AV_PERM_READ;
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pic->refcount = 1;
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picref->type = AVMEDIA_TYPE_VIDEO;
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pic->format = picref->format = format;
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memcpy(pic->data, data, 4*sizeof(data[0]));
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memcpy(pic->linesize, linesize, 4*sizeof(linesize[0]));
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memcpy(picref->data, pic->data, sizeof(picref->data));
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memcpy(picref->linesize, pic->linesize, sizeof(picref->linesize));
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pic-> extended_data = pic->data;
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picref->extended_data = picref->data;
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picref->pts = AV_NOPTS_VALUE;
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return picref;
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fail:
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if (picref && picref->video)
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av_free(picref->video);
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av_free(picref);
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av_free(pic);
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return NULL;
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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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av_unused char buf[16];
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FF_DPRINTF_START(NULL, get_video_buffer); ff_dlog_link(NULL, link, 0);
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av_dlog(NULL, " perms:%s w:%d h:%d\n", ff_get_ref_perms_string(buf, sizeof(buf), perms), w, h);
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if (link->dstpad->get_video_buffer)
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ret = link->dstpad->get_video_buffer(link, perms, w, h);
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if (!ret)
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ret = ff_default_get_video_buffer(link, perms, w, h);
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if (ret)
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ret->type = AVMEDIA_TYPE_VIDEO;
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FF_DPRINTF_START(NULL, get_video_buffer); ff_dlog_link(NULL, link, 0); av_dlog(NULL, " returning "); ff_dlog_ref(NULL, ret, 1);
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return ret;
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}
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void ff_null_start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
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{
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ff_start_frame(link->dst->outputs[0], picref);
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}
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static void default_start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
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{
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AVFilterLink *outlink = NULL;
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if (inlink->dst->output_count)
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outlink = inlink->dst->outputs[0];
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if (outlink) {
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outlink->out_buf = avfilter_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);
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avfilter_copy_buffer_ref_props(outlink->out_buf, picref);
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ff_start_frame(outlink, avfilter_ref_buffer(outlink->out_buf, ~0));
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}
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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 ff_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->dstpad;
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int perms = picref->perms;
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FF_DPRINTF_START(NULL, start_frame); ff_dlog_link(NULL, link, 0); av_dlog(NULL, " "); ff_dlog_ref(NULL, picref, 1);
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if (!(start_frame = dst->start_frame))
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start_frame = default_start_frame;
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if (picref->linesize[0] < 0)
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perms |= AV_PERM_NEG_LINESIZES;
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/* prepare to copy the picture if it has insufficient permissions */
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if ((dst->min_perms & perms) != dst->min_perms || dst->rej_perms & perms) {
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av_log(link->dst, AV_LOG_DEBUG,
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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->dstpad->min_perms, link->dstpad->rej_perms);
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link->cur_buf = avfilter_get_video_buffer(link, dst->min_perms, link->w, link->h);
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link->src_buf = picref;
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avfilter_copy_buffer_ref_props(link->cur_buf, link->src_buf);
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}
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else
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link->cur_buf = picref;
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start_frame(link, link->cur_buf);
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}
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void ff_null_end_frame(AVFilterLink *link)
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{
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ff_end_frame(link->dst->outputs[0]);
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}
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static void default_end_frame(AVFilterLink *inlink)
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{
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AVFilterLink *outlink = NULL;
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if (inlink->dst->output_count)
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outlink = inlink->dst->outputs[0];
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avfilter_unref_buffer(inlink->cur_buf);
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inlink->cur_buf = NULL;
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if (outlink) {
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if (outlink->out_buf) {
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avfilter_unref_buffer(outlink->out_buf);
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outlink->out_buf = NULL;
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}
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ff_end_frame(outlink);
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}
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}
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void ff_end_frame(AVFilterLink *link)
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{
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void (*end_frame)(AVFilterLink *);
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if (!(end_frame = link->dstpad->end_frame))
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end_frame = 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->src_buf) {
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avfilter_unref_buffer(link->src_buf);
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link->src_buf = NULL;
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}
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}
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void ff_null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
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{
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ff_draw_slice(link->dst->outputs[0], y, h, slice_dir);
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}
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static void default_draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir)
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{
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AVFilterLink *outlink = NULL;
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if (inlink->dst->output_count)
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outlink = inlink->dst->outputs[0];
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if (outlink)
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ff_draw_slice(outlink, y, h, slice_dir);
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}
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void ff_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_dlog_link(NULL, link, 0); av_dlog(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->src_buf) {
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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->src_buf->data[i]) {
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src[i] = link->src_buf-> data[i] +
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(y >> (i==1 || i==2 ? vsub : 0)) * link->src_buf-> linesize[i];
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dst[i] = link->cur_buf->data[i] +
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(y >> (i==1 || i==2 ? vsub : 0)) * link->cur_buf->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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av_image_get_linesize(link->format, link->cur_buf->video->w, i);
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if (!src[i]) continue;
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for (j = 0; j < h >> (i==1 || i==2 ? vsub : 0); j++) {
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memcpy(dst[i], src[i], planew);
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src[i] += link->src_buf->linesize[i];
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dst[i] += link->cur_buf->linesize[i];
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}
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}
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}
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if (!(draw_slice = link->dstpad->draw_slice))
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draw_slice = default_draw_slice;
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draw_slice(link, y, h, slice_dir);
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}
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#if FF_API_FILTERS_PUBLIC
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AVFilterBufferRef *avfilter_default_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
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{
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return ff_default_get_video_buffer(link, perms, w, h);
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}
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void avfilter_default_start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
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{
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default_start_frame(inlink, picref);
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}
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void avfilter_default_end_frame(AVFilterLink *inlink)
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{
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default_end_frame(inlink);
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}
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void avfilter_default_draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir)
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{
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default_draw_slice(inlink, y, h, slice_dir);
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}
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AVFilterBufferRef *avfilter_null_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
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{
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return ff_null_get_video_buffer(link, perms, w, h);
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}
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void avfilter_null_start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
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{
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ff_null_start_frame(link, picref);
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}
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void avfilter_null_end_frame(AVFilterLink *link)
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{
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ff_null_end_frame(link);
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}
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void avfilter_null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
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{
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ff_null_draw_slice(link, y, h, slice_dir);
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}
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void avfilter_start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
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{
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ff_start_frame(link, picref);
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}
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void avfilter_end_frame(AVFilterLink *link)
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{
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ff_end_frame(link);
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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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ff_draw_slice(link, y, h, slice_dir);
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}
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#endif
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