/* * filter layer * Copyright (c) 2007 Bobby Bingham * * 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 */ /* #define DEBUG */ #include "libavutil/pixdesc.h"#include "libavutil/rational.h"#include "libavutil/audioconvert.h"#include "libavutil/imgutils.h"#include "libavutil/avassert.h"#include "libavutil/avstring.h"#include "avfilter.h"#include "internal.h" unsigned avfilter_version(void) {    av_assert0(LIBAVFILTER_VERSION_MICRO >= 100);    return LIBAVFILTER_VERSION_INT;} const char *avfilter_configuration(void){    return FFMPEG_CONFIGURATION;} const char *avfilter_license(void){#define LICENSE_PREFIX "libavfilter license: "    return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;} static void command_queue_pop(AVFilterContext *filter){    AVFilterCommand *c= filter->command_queue;    av_freep(&c->arg);    av_freep(&c->command);    filter->command_queue= c->next;    av_free(c);} 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;    } 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;    }    ret->perms &= pmask;    ret->buf->refcount ++;    return ret;} static void 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) {        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);    }    av_freep(&ref->video);    av_freep(&ref->audio);    av_free(ref);} void avfilter_unref_bufferp(AVFilterBufferRef **ref){    avfilter_unref_buffer(*ref);    *ref = NULL;} void avfilter_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,                         AVFilterPad **pads, AVFilterLink ***links,                         AVFilterPad *newpad){    unsigned i;     idx = FFMIN(idx, *count);     *pads  = av_realloc(*pads,  sizeof(AVFilterPad)   * (*count + 1));    *links = av_realloc(*links, sizeof(AVFilterLink*) * (*count + 1));    memmove(*pads +idx+1, *pads +idx, sizeof(AVFilterPad)   * (*count-idx));    memmove(*links+idx+1, *links+idx, sizeof(AVFilterLink*) * (*count-idx));    memcpy(*pads+idx, newpad, sizeof(AVFilterPad));    (*links)[idx] = NULL;     (*count)++;    for (i = idx+1; i < *count; i++)        if (*links[i])            (*(unsigned *)((uint8_t *) *links[i] + padidx_off))++;} int avfilter_link(AVFilterContext *src, unsigned srcpad,                  AVFilterContext *dst, unsigned dstpad){    AVFilterLink *link;     if (src->output_count <= srcpad || dst->input_count <= dstpad ||        src->outputs[srcpad]        || dst->inputs[dstpad])        return -1;     if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) {        av_log(src, AV_LOG_ERROR,               "Media type mismatch between the '%s' filter output pad %d and the '%s' filter input pad %d\n",               src->name, srcpad, dst->name, dstpad);        return AVERROR(EINVAL);    }     src->outputs[srcpad] =    dst-> inputs[dstpad] = link = av_mallocz(sizeof(AVFilterLink));     link->src     = src;    link->dst     = dst;    link->srcpad  = &src->output_pads[srcpad];    link->dstpad  = &dst->input_pads[dstpad];    link->type    = src->output_pads[srcpad].type;    assert(PIX_FMT_NONE == -1 && AV_SAMPLE_FMT_NONE == -1);    link->format  = -1;     return 0;} void avfilter_link_free(AVFilterLink **link){    if (!*link)        return;     if ((*link)->pool)        free_pool((*link)->pool);     av_freep(link);} int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,                           unsigned filt_srcpad_idx, unsigned filt_dstpad_idx){    int ret;    unsigned dstpad_idx = link->dstpad - link->dst->input_pads;     av_log(link->dst, AV_LOG_INFO, "auto-inserting filter '%s' "           "between the filter '%s' and the filter '%s'\n",           filt->name, link->src->name, link->dst->name);     link->dst->inputs[dstpad_idx] = NULL;    if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) {        /* failed to link output filter to new filter */        link->dst->inputs[dstpad_idx] = link;        return ret;    }     /* re-hookup the link to the new destination filter we inserted */    link->dst = filt;    link->dstpad = &filt->input_pads[filt_srcpad_idx];    filt->inputs[filt_srcpad_idx] = link;     /* if any information on supported media formats already exists on the     * link, we need to preserve that */    if (link->out_formats)        avfilter_formats_changeref(&link->out_formats,                                   &filt->outputs[filt_dstpad_idx]->out_formats);    if (link->out_chlayouts)        avfilter_formats_changeref(&link->out_chlayouts,                                   &filt->outputs[filt_dstpad_idx]->out_chlayouts);    if (link->out_packing)        avfilter_formats_changeref(&link->out_packing,                                   &filt->outputs[filt_dstpad_idx]->out_packing);     return 0;} int avfilter_config_links(AVFilterContext *filter){    int (*config_link)(AVFilterLink *);    unsigned i;    int ret;     for (i = 0; i < filter->input_count; i ++) {        AVFilterLink *link = filter->inputs[i];        AVFilterLink *inlink = link->src->input_count ?            link->src->inputs[0] : NULL;         if (!link) continue;         link->current_pts = AV_NOPTS_VALUE;         switch (link->init_state) {        case AVLINK_INIT:            continue;        case AVLINK_STARTINIT:            av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");            return 0;        case AVLINK_UNINIT:            link->init_state = AVLINK_STARTINIT;             if ((ret = avfilter_config_links(link->src)) < 0)                return ret;             if (!(config_link = link->srcpad->config_props)) {                if (link->src->input_count != 1) {                    av_log(link->src, AV_LOG_ERROR, "Source filters and filters "                                                    "with more than one input "                                                    "must set config_props() "                                                    "callbacks on all outputs\n");                    return AVERROR(EINVAL);                }            } else if ((ret = config_link(link)) < 0)                return ret;             switch (link->type) {            case AVMEDIA_TYPE_VIDEO:                if (!link->time_base.num && !link->time_base.den)                    link->time_base = inlink ? inlink->time_base : AV_TIME_BASE_Q;                 if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den)                    link->sample_aspect_ratio = inlink ?                        inlink->sample_aspect_ratio : (AVRational){1,1};                 if (inlink) {                    if (!link->w)                        link->w = inlink->w;                    if (!link->h)                        link->h = inlink->h;                } else if (!link->w || !link->h) {                    av_log(link->src, AV_LOG_ERROR,                           "Video source filters must set their output link's "                           "width and height\n");                    return AVERROR(EINVAL);                }                break;             case AVMEDIA_TYPE_AUDIO:                if (inlink) {                    if (!link->sample_rate)                        link->sample_rate = inlink->sample_rate;                    if (!link->time_base.num && !link->time_base.den)                        link->time_base = inlink->time_base;                } else if (!link->sample_rate) {                    av_log(link->src, AV_LOG_ERROR,                           "Audio source filters must set their output link's "                           "sample_rate\n");                    return AVERROR(EINVAL);                }                 if (!link->time_base.num && !link->time_base.den)                    link->time_base = (AVRational) {1, link->sample_rate};            }             if ((config_link = link->dstpad->config_props))                if ((ret = config_link(link)) < 0)                    return ret;             link->init_state = AVLINK_INIT;        }    }     return 0;} static char *ff_get_ref_perms_string(char *buf, size_t buf_size, int perms){    snprintf(buf, buf_size, "%s%s%s%s%s%s",             perms & AV_PERM_READ      ? "r" : "",             perms & AV_PERM_WRITE     ? "w" : "",             perms & AV_PERM_PRESERVE  ? "p" : "",             perms & AV_PERM_REUSE     ? "u" : "",             perms & AV_PERM_REUSE2    ? "U" : "",             perms & AV_PERM_NEG_LINESIZES ? "n" : "");    return buf;} static void ff_dlog_ref(void *ctx, AVFilterBufferRef *ref, int end){    av_unused char buf[16];    av_dlog(ctx,            "ref[%p buf:%p refcount:%d perms:%s data:%p linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64,            ref, ref->buf, ref->buf->refcount, ff_get_ref_perms_string(buf, sizeof(buf), ref->perms), ref->data[0],            ref->linesize[0], ref->linesize[1], ref->linesize[2], ref->linesize[3],            ref->pts, ref->pos);     if (ref->video) {        av_dlog(ctx, " a:%d/%d s:%dx%d i:%c iskey:%d type:%c",                ref->video->sample_aspect_ratio.num, ref->video->sample_aspect_ratio.den,                ref->video->w, ref->video->h,                !ref->video->interlaced     ? 'P' :         /* Progressive  */                ref->video->top_field_first ? 'T' : 'B',    /* Top / Bottom */                ref->video->key_frame,                av_get_picture_type_char(ref->video->pict_type));    }    if (ref->audio) {        av_dlog(ctx, " cl:%"PRId64"d n:%d r:%d p:%d",                ref->audio->channel_layout,                ref->audio->nb_samples,                ref->audio->sample_rate,                ref->audio->planar);    }     av_dlog(ctx, "]%s", end ? "\n" : "");} static void ff_dlog_link(void *ctx, AVFilterLink *link, int end){    if (link->type == AVMEDIA_TYPE_VIDEO) {        av_dlog(ctx,                "link[%p s:%dx%d fmt:%s %s->%s]%s",                link, link->w, link->h,                av_pix_fmt_descriptors[link->format].name,                link->src ? link->src->filter->name : "",                link->dst ? link->dst->filter->name : "",                end ? "\n" : "");    } else {        char buf[128];        av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);         av_dlog(ctx,                "link[%p r:%d cl:%s fmt:%s %s->%s]%s",                link, (int)link->sample_rate, buf,                av_get_sample_fmt_name(link->format),                link->src ? link->src->filter->name : "",                link->dst ? link->dst->filter->name : "",                end ? "\n" : "");    }} #define FF_DPRINTF_START(ctx, func) av_dlog(NULL, "%-16s: ", #func) AVFilterBufferRef *avfilter_get_video_buffer(AVFilterLink *link, int perms, int w, int h){    AVFilterBufferRef *ret = NULL;     av_unused char buf[16];    FF_DPRINTF_START(NULL, get_video_buffer); ff_dlog_link(NULL, link, 0);    av_dlog(NULL, " perms:%s w:%d h:%d\n", ff_get_ref_perms_string(buf, sizeof(buf), perms), w, h);     if (link->dstpad->get_video_buffer)        ret = link->dstpad->get_video_buffer(link, perms, w, h);     if (!ret)        ret = avfilter_default_get_video_buffer(link, perms, w, h);     if (ret)        ret->type = AVMEDIA_TYPE_VIDEO;     FF_DPRINTF_START(NULL, get_video_buffer); ff_dlog_link(NULL, link, 0); av_dlog(NULL, " returning "); ff_dlog_ref(NULL, ret, 1);     return ret;} AVFilterBufferRef *avfilter_get_video_buffer_ref_from_arrays(uint8_t * const data[4], const int linesize[4], int perms,                                          int w, int h, enum PixelFormat format){    AVFilterBuffer *pic = av_mallocz(sizeof(AVFilterBuffer));    AVFilterBufferRef *picref = av_mallocz(sizeof(AVFilterBufferRef));     if (!pic || !picref)        goto fail;     picref->buf = pic;    picref->buf->free = ff_avfilter_default_free_buffer;    if (!(picref->video = av_mallocz(sizeof(AVFilterBufferRefVideoProps))))        goto fail;     pic->w = picref->video->w = w;    pic->h = picref->video->h = h;     /* make sure the buffer gets read permission or it's useless for output */    picref->perms = perms | AV_PERM_READ;     pic->refcount = 1;    picref->type = AVMEDIA_TYPE_VIDEO;    pic->format = picref->format = format;     memcpy(pic->data,        data,          4*sizeof(data[0]));    memcpy(pic->linesize,    linesize,      4*sizeof(linesize[0]));    memcpy(picref->data,     pic->data,     sizeof(picref->data));    memcpy(picref->linesize, pic->linesize, sizeof(picref->linesize));     return picref; fail:    if (picref && picref->video)        av_free(picref->video);    av_free(picref);    av_free(pic);    return NULL;} AVFilterBufferRef *avfilter_get_audio_buffer(AVFilterLink *link,                                             int perms, int nb_samples){    AVFilterBufferRef *ret = NULL;     if (link->dstpad->get_audio_buffer)        ret = link->dstpad->get_audio_buffer(link, perms, nb_samples);     if (!ret)        ret = avfilter_default_get_audio_buffer(link, perms, nb_samples);     if (ret)        ret->type = AVMEDIA_TYPE_AUDIO;     return ret;}

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