/* * Copyright Stefano Sabatini <stefasab gmail com> * Copyright Anton Khirnov <anton khirnov net> * Copyright Michael Niedermayer <michaelni gmx at> * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "libavutil/audioconvert.h"#include "libavutil/avassert.h"#include "libavcodec/avcodec.h" #include "avfilter.h"#include "internal.h"#include "avcodec.h" void ff_avfilter_default_free_buffer(AVFilterBuffer *ptr){    if (ptr->extended_data != ptr->data)        av_freep(&ptr->extended_data);    av_free(ptr->data[0]);    av_free(ptr);} AVFilterBufferRef *avfilter_ref_buffer(AVFilterBufferRef *ref, int pmask){    AVFilterBufferRef *ret = av_malloc(sizeof(AVFilterBufferRef));    if (!ret)        return NULL;    *ret = *ref;    if (ref->type == AVMEDIA_TYPE_VIDEO) {        ret->video = av_malloc(sizeof(AVFilterBufferRefVideoProps));        if (!ret->video) {            av_free(ret);            return NULL;        }        *ret->video = *ref->video;        ret->extended_data = ret->data;    } else if (ref->type == AVMEDIA_TYPE_AUDIO) {        ret->audio = av_malloc(sizeof(AVFilterBufferRefAudioProps));        if (!ret->audio) {            av_free(ret);            return NULL;        }        *ret->audio = *ref->audio;         if (ref->extended_data && ref->extended_data != ref->data) {            int nb_channels = av_get_channel_layout_nb_channels(ref->audio->channel_layout);            if (!(ret->extended_data = av_malloc(sizeof(*ret->extended_data) *                                                 nb_channels))) {                av_freep(&ret->audio);                av_freep(&ret);                return NULL;            }            memcpy(ret->extended_data, ref->extended_data,                   sizeof(*ret->extended_data) * nb_channels);        } else            ret->extended_data = ret->data;    }    ret->perms &= pmask;    ret->buf->refcount ++;    return ret;} void ff_free_pool(AVFilterPool *pool){    int i;     av_assert0(pool->refcount > 0);     for (i = 0; i < POOL_SIZE; i++) {        if (pool->pic[i]) {            AVFilterBufferRef *picref = pool->pic[i];            /* free buffer: picrefs stored in the pool are not             * supposed to contain a free callback */            av_assert0(!picref->buf->refcount);            av_freep(&picref->buf->data[0]);            av_freep(&picref->buf);             av_freep(&picref->audio);            av_freep(&picref->video);            av_freep(&pool->pic[i]);            pool->count--;        }    }    pool->draining = 1;     if (!--pool->refcount) {        av_assert0(!pool->count);        av_free(pool);    }} static void store_in_pool(AVFilterBufferRef *ref){    int i;    AVFilterPool *pool= ref->buf->priv;     av_assert0(ref->buf->data[0]);    av_assert0(pool->refcount>0);     if (pool->count == POOL_SIZE) {        AVFilterBufferRef *ref1 = pool->pic[0];        av_freep(&ref1->video);        av_freep(&ref1->audio);        av_freep(&ref1->buf->data[0]);        av_freep(&ref1->buf);        av_free(ref1);        memmove(&pool->pic[0], &pool->pic[1], sizeof(void*)*(POOL_SIZE-1));        pool->count--;        pool->pic[POOL_SIZE-1] = NULL;    }     for (i = 0; i < POOL_SIZE; i++) {        if (!pool->pic[i]) {            pool->pic[i] = ref;            pool->count++;            break;        }    }    if (pool->draining) {        ff_free_pool(pool);    } else        --pool->refcount;} void avfilter_unref_buffer(AVFilterBufferRef *ref){    if (!ref)        return;    av_assert0(ref->buf->refcount > 0);    if (!(--ref->buf->refcount)) {        if (!ref->buf->free) {            store_in_pool(ref);            return;        }        ref->buf->free(ref->buf);    }    if (ref->extended_data != ref->data)        av_freep(&ref->extended_data);    av_freep(&ref->video);    av_freep(&ref->audio);    av_free(ref);} void avfilter_unref_bufferp(AVFilterBufferRef **ref){    avfilter_unref_buffer(*ref);    *ref = NULL;} int avfilter_copy_buf_props(AVFrame *dst, const AVFilterBufferRef *src){    int planes, nb_channels;     memcpy(dst->data, src->data, sizeof(dst->data));    memcpy(dst->linesize, src->linesize, sizeof(dst->linesize));     dst->pts     = src->pts;    dst->format  = src->format;     switch (src->type) {    case AVMEDIA_TYPE_VIDEO:        dst->width               = src->video->w;        dst->height              = src->video->h;        dst->sample_aspect_ratio = src->video->sample_aspect_ratio;        dst->interlaced_frame    = src->video->interlaced;        dst->top_field_first     = src->video->top_field_first;        dst->key_frame           = src->video->key_frame;        dst->pict_type           = src->video->pict_type;        break;    case AVMEDIA_TYPE_AUDIO:        nb_channels = av_get_channel_layout_nb_channels(src->audio->channel_layout);        planes      = av_sample_fmt_is_planar(src->format) ? nb_channels : 1;         if (planes > FF_ARRAY_ELEMS(dst->data)) {            dst->extended_data = av_mallocz(planes * sizeof(*dst->extended_data));            if (!dst->extended_data)                return AVERROR(ENOMEM);            memcpy(dst->extended_data, src->extended_data,                   planes * sizeof(dst->extended_data));        } else            dst->extended_data = dst->data;         dst->sample_rate         = src->audio->sample_rate;        dst->channel_layout      = src->audio->channel_layout;        dst->nb_samples          = src->audio->nb_samples;        break;    default:        return AVERROR(EINVAL);    }     return 0;} void avfilter_copy_buffer_ref_props(AVFilterBufferRef *dst, AVFilterBufferRef *src){    // copy common properties    dst->pts             = src->pts;    dst->pos             = src->pos;     switch (src->type) {    case AVMEDIA_TYPE_VIDEO: *dst->video = *src->video; break;    case AVMEDIA_TYPE_AUDIO: *dst->audio = *src->audio; break;    default: break;    }}