mirror of
https://git.ffmpeg.org/ffmpeg.git
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465a72b4b4
avcodec.c is where it is defined the lavc/lavfi interface code, so seems a more adequate location (and doesn't force the inclusion of libavcodec/avcodec.h where it is not required).
178 lines
5.0 KiB
C
178 lines
5.0 KiB
C
/*
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* Copyright Stefano Sabatini <stefasab gmail com>
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* Copyright Anton Khirnov <anton khirnov net>
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* Copyright Michael Niedermayer <michaelni gmx at>
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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 "libavutil/audioconvert.h"
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#include "libavutil/avassert.h"
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#include "libavcodec/avcodec.h"
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#include "avfilter.h"
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#include "internal.h"
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#include "avcodec.h"
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void ff_avfilter_default_free_buffer(AVFilterBuffer *ptr)
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{
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if (ptr->extended_data != ptr->data)
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av_freep(&ptr->extended_data);
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av_free(ptr->data[0]);
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av_free(ptr);
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}
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AVFilterBufferRef *avfilter_ref_buffer(AVFilterBufferRef *ref, int pmask)
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{
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AVFilterBufferRef *ret = av_malloc(sizeof(AVFilterBufferRef));
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if (!ret)
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return NULL;
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*ret = *ref;
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if (ref->type == AVMEDIA_TYPE_VIDEO) {
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ret->video = av_malloc(sizeof(AVFilterBufferRefVideoProps));
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if (!ret->video) {
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av_free(ret);
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return NULL;
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}
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*ret->video = *ref->video;
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ret->extended_data = ret->data;
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} else if (ref->type == AVMEDIA_TYPE_AUDIO) {
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ret->audio = av_malloc(sizeof(AVFilterBufferRefAudioProps));
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if (!ret->audio) {
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av_free(ret);
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return NULL;
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}
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*ret->audio = *ref->audio;
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if (ref->extended_data && ref->extended_data != ref->data) {
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int nb_channels = av_get_channel_layout_nb_channels(ref->audio->channel_layout);
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if (!(ret->extended_data = av_malloc(sizeof(*ret->extended_data) *
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nb_channels))) {
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av_freep(&ret->audio);
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av_freep(&ret);
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return NULL;
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}
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memcpy(ret->extended_data, ref->extended_data,
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sizeof(*ret->extended_data) * nb_channels);
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} else
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ret->extended_data = ret->data;
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}
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ret->perms &= pmask;
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ret->buf->refcount ++;
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return ret;
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}
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void ff_free_pool(AVFilterPool *pool)
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{
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int i;
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av_assert0(pool->refcount > 0);
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for (i = 0; i < POOL_SIZE; i++) {
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if (pool->pic[i]) {
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AVFilterBufferRef *picref = pool->pic[i];
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/* free buffer: picrefs stored in the pool are not
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* supposed to contain a free callback */
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av_assert0(!picref->buf->refcount);
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av_freep(&picref->buf->data[0]);
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av_freep(&picref->buf);
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av_freep(&picref->audio);
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av_freep(&picref->video);
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av_freep(&pool->pic[i]);
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pool->count--;
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}
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}
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pool->draining = 1;
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if (!--pool->refcount) {
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av_assert0(!pool->count);
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av_free(pool);
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}
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}
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static void store_in_pool(AVFilterBufferRef *ref)
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{
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int i;
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AVFilterPool *pool= ref->buf->priv;
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av_assert0(ref->buf->data[0]);
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av_assert0(pool->refcount>0);
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if (pool->count == POOL_SIZE) {
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AVFilterBufferRef *ref1 = pool->pic[0];
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av_freep(&ref1->video);
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av_freep(&ref1->audio);
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av_freep(&ref1->buf->data[0]);
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av_freep(&ref1->buf);
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av_free(ref1);
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memmove(&pool->pic[0], &pool->pic[1], sizeof(void*)*(POOL_SIZE-1));
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pool->count--;
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pool->pic[POOL_SIZE-1] = NULL;
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}
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for (i = 0; i < POOL_SIZE; i++) {
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if (!pool->pic[i]) {
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pool->pic[i] = ref;
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pool->count++;
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break;
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}
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}
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if (pool->draining) {
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ff_free_pool(pool);
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} else
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--pool->refcount;
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}
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void avfilter_unref_buffer(AVFilterBufferRef *ref)
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{
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if (!ref)
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return;
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av_assert0(ref->buf->refcount > 0);
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if (!(--ref->buf->refcount)) {
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if (!ref->buf->free) {
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store_in_pool(ref);
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return;
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}
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ref->buf->free(ref->buf);
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}
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if (ref->extended_data != ref->data)
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av_freep(&ref->extended_data);
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av_freep(&ref->video);
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av_freep(&ref->audio);
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av_free(ref);
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}
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void avfilter_unref_bufferp(AVFilterBufferRef **ref)
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{
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avfilter_unref_buffer(*ref);
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*ref = NULL;
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}
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void avfilter_copy_buffer_ref_props(AVFilterBufferRef *dst, AVFilterBufferRef *src)
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{
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// copy common properties
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dst->pts = src->pts;
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dst->pos = src->pos;
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switch (src->type) {
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case AVMEDIA_TYPE_VIDEO: *dst->video = *src->video; break;
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case AVMEDIA_TYPE_AUDIO: *dst->audio = *src->audio; break;
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default: break;
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}
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}
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