mirror of https://git.ffmpeg.org/ffmpeg.git
161 lines
5.1 KiB
C
161 lines
5.1 KiB
C
/*
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* Copyright 2007 Bobby Bingham
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* Copyright Stefano Sabatini <stefasab gmail com>
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* Copyright Vitor Sessak <vitor1001 gmail com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <string.h>
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#include <stdio.h>
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#include "libavutil/avassert.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/mem.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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AVFilterBufferRef *ff_null_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
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{
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return ff_get_video_buffer(link->dst->outputs[0], perms, w, h);
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}
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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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int i;
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AVFilterBufferRef *picref = NULL;
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AVFilterPool *pool = link->pool;
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int full_perms = AV_PERM_READ | AV_PERM_WRITE | AV_PERM_PRESERVE |
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AV_PERM_REUSE | AV_PERM_REUSE2 | AV_PERM_ALIGN;
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av_assert1(!(perms & ~(full_perms | AV_PERM_NEG_LINESIZES)));
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if (pool) {
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for (i = 0; i < POOL_SIZE; i++) {
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picref = pool->pic[i];
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if (picref && picref->buf->format == link->format && picref->buf->w == w && picref->buf->h == h) {
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AVFilterBuffer *pic = picref->buf;
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pool->pic[i] = NULL;
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pool->count--;
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av_assert0(!picref->video->qp_table);
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picref->video->w = w;
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picref->video->h = h;
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picref->perms = full_perms;
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picref->format = link->format;
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pic->refcount = 1;
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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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pool->refcount++;
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return picref;
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}
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}
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} else {
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pool = link->pool = av_mallocz(sizeof(AVFilterPool));
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pool->refcount = 1;
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}
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// align: +2 is needed for swscaler, +16 to be SIMD-friendly
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if ((i = av_image_alloc(data, linesize, w, h, link->format, 32)) < 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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full_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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memset(data[0], 128, i);
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picref->buf->priv = pool;
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picref->buf->free = NULL;
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pool->refcount++;
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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 * const data[4], const int linesize[4], int perms,
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int w, int h, enum AVPixelFormat 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 *ff_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_TPRINTF_START(NULL, get_video_buffer); ff_tlog_link(NULL, link, 0);
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ff_tlog(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_TPRINTF_START(NULL, get_video_buffer); ff_tlog_link(NULL, link, 0); ff_tlog(NULL, " returning "); ff_tlog_ref(NULL, ret, 1);
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return ret;
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}
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