/* * 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/channel_layout.h"#include "libavutil/avassert.h"#include "libavutil/common.h"#include "libavutil/imgutils.h"#include "libavcodec/avcodec.h" #include "avfilter.h"#include "internal.h"#include "audio.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);} static void copy_video_props(AVFilterBufferRefVideoProps *dst, AVFilterBufferRefVideoProps *src) {    *dst = *src;    if (src->qp_table) {        int qsize = src->qp_table_size;        dst->qp_table = av_malloc(qsize);        memcpy(dst->qp_table, src->qp_table, qsize);    }} AVFilterBufferRef *avfilter_ref_buffer(AVFilterBufferRef *ref, int pmask){    AVFilterBufferRef *ret = av_malloc(sizeof(AVFilterBufferRef));    if (!ret)        return NULL;    *ret = *ref;     ret->metadata = NULL;    av_dict_copy(&ret->metadata, ref->metadata, 0);     if (ref->type == AVMEDIA_TYPE_VIDEO) {        ret->video = av_malloc(sizeof(AVFilterBufferRefVideoProps));        if (!ret->video) {            av_free(ret);            return NULL;        }        copy_video_props(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_assert0(!picref->video || !picref->video->qp_table);            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 (ref->video)        av_freep(&ref->video->qp_table);     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);    if (ref->video)        av_freep(&ref->video->qp_table);    av_freep(&ref->video);    av_freep(&ref->audio);    av_dict_free(&ref->metadata);    av_free(ref);} void avfilter_unref_bufferp(AVFilterBufferRef **ref){    avfilter_unref_buffer(*ref);    *ref = NULL;} 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: {        if (dst->video->qp_table)            av_freep(&dst->video->qp_table);        copy_video_props(dst->video, src->video);        break;    }    case AVMEDIA_TYPE_AUDIO: *dst->audio = *src->audio; break;    default: break;    }     av_dict_free(&dst->metadata);    av_dict_copy(&dst->metadata, src->metadata, 0);} AVFilterBufferRef *ff_copy_buffer_ref(AVFilterLink *outlink,                                      AVFilterBufferRef *ref){    AVFilterBufferRef *buf;    int channels;     switch (outlink->type) {     case AVMEDIA_TYPE_VIDEO:        buf = ff_get_video_buffer(outlink, AV_PERM_WRITE,                                  ref->video->w, ref->video->h);        if(!buf)            return NULL;        av_image_copy(buf->data, buf->linesize,                      (void*)ref->data, ref->linesize,                      ref->format, ref->video->w, ref->video->h);        break;     case AVMEDIA_TYPE_AUDIO:        buf = ff_get_audio_buffer(outlink, AV_PERM_WRITE,                                        ref->audio->nb_samples);        if(!buf)            return NULL;        channels = ref->audio->channels;        av_samples_copy(buf->extended_data, ref->buf->extended_data,                        0, 0, ref->audio->nb_samples,                        channels,                        ref->format);        break;     default:        return NULL;    }    avfilter_copy_buffer_ref_props(buf, ref);    return buf;}