/* * 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 "avfilter.h"#include "internal.h" unsigned avfilter_version(void) {    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;} 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;} void avfilter_unref_buffer(AVFilterBufferRef *ref){    if (!ref)        return;    if (!(--ref->buf->refcount))        ref->buf->free(ref->buf);    av_free(ref->video);    av_free(ref->audio);    av_free(ref);} 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;} 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);     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];         if (!link) continue;         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))                config_link  = avfilter_default_config_output_link;            if ((ret = config_link(link)) < 0)                return ret;             if (link->time_base.num == 0 && link->time_base.den == 0)                link->time_base = link->src && link->src->input_count ?                    link->src->inputs[0]->time_base : AV_TIME_BASE_Q;             if (link->sample_aspect_ratio.num == 0 && link->sample_aspect_ratio.den == 0)                link->sample_aspect_ratio = link->src->input_count ?                    link->src->inputs[0]->sample_aspect_ratio : (AVRational){1,1};             if (link->sample_rate == 0 && link->src && link->src->input_count)                link->sample_rate = link->src->inputs[0]->sample_rate;             if (link->channel_layout == 0 && link->src && link->src->input_count)                link->channel_layout = link->src->inputs[0]->channel_layout;             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",                ref->video->pixel_aspect.num, ref->video->pixel_aspect.den,                ref->video->w, ref->video->h,                !ref->video->interlaced     ? 'P' :         /* Progressive  */                ref->video->top_field_first ? 'T' : 'B');   /* Top / Bottom */    }    if (ref->audio) {        av_dlog(ctx, " cl:%"PRId64"d sn:%d s:%d sr:%d p:%d",                ref->audio->channel_layout,                ref->audio->nb_samples,                ref->audio->size,                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:%-16s %-16s->%-16s]%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:%"PRId64" cl:%s fmt:%-16s %-16s->%-16s]%s",                link, 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 *data[4], 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,          sizeof(pic->data));    memcpy(pic->linesize,    linesize,      sizeof(pic->linesize));    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,                                             enum AVSampleFormat sample_fmt, int size,                                             int64_t channel_layout, int planar){    AVFilterBufferRef *ret = NULL;     if (link->dstpad->get_audio_buffer)        ret = link->dstpad->get_audio_buffer(link, perms, sample_fmt, size, channel_layout, planar);     if (!ret)        ret = avfilter_default_get_audio_buffer(link, perms, sample_fmt, size, channel_layout, planar);     if (ret)        ret->type = AVMEDIA_TYPE_AUDIO;     return ret;} int avfilter_request_frame(AVFilterLink *link){    FF_DPRINTF_START(NULL, request_frame); ff_dlog_link(NULL, link, 1);     if (link->srcpad->request_frame)        return link->srcpad->request_frame(link);    else if (link->src->inputs[0])        return avfilter_request_frame(link->src->inputs[0]);    else return -1;} int avfilter_poll_frame(AVFilterLink *link){    int i, min = INT_MAX;     if (link->srcpad->poll_frame)        return link->srcpad->poll_frame(link);     for (i = 0; i < link->src->input_count; i++) {        int val;        if (!link->src->inputs[i])            return -1;        val = avfilter_poll_frame(link->src->inputs[i]);        min = FFMIN(min, val);    }     return min;} /* XXX: should we do the duplicating of the picture ref here, instead of * forcing the source filter to do it? */void avfilter_start_frame(AVFilterLink *link, AVFilterBufferRef *picref){    void (*start_frame)(AVFilterLink *, AVFilterBufferRef *);    AVFilterPad *dst = link->dstpad;    int perms = picref->perms;     FF_DPRINTF_START(NULL, start_frame); ff_dlog_link(NULL, link, 0); av_dlog(NULL, " "); ff_dlog_ref(NULL, picref, 1);     if (!(start_frame = dst->start_frame))        start_frame = avfilter_default_start_frame;     if (picref->linesize[0] < 0)        perms |= AV_PERM_NEG_LINESIZES;    /* prepare to copy the picture if it has insufficient permissions */    if ((dst->min_perms & perms) != dst->min_perms || dst->rej_perms & perms) {        av_log(link->dst, AV_LOG_DEBUG,                "frame copy needed (have perms %x, need %x, reject %x)\n",                picref->perms,                link->dstpad->min_perms, link->dstpad->rej_perms);         link->cur_buf = avfilter_get_video_buffer(link, dst->min_perms, link->w, link->h);        link->src_buf = picref;        avfilter_copy_buffer_ref_props(link->cur_buf, link->src_buf);    }    else        link->cur_buf = picref;     start_frame(link, link->cur_buf);} void avfilter_end_frame(AVFilterLink *link){    void (*end_frame)(AVFilterLink *);     if (!(end_frame = link->dstpad->end_frame))        end_frame = avfilter_default_end_frame;     end_frame(link);     /* unreference the source picture if we're feeding the destination filter     * a copied version dues to permission issues */    if (link->src_buf) {        avfilter_unref_buffer(link->src_buf);        link->src_buf = NULL;    }} void avfilter_draw_slice(AVFilterLink *link, int y, int h, int slice_dir){    uint8_t *src[4], *dst[4];    int i, j, vsub;    void (*draw_slice)(AVFilterLink *, int, int, int);     FF_DPRINTF_START(NULL, draw_slice); ff_dlog_link(NULL, link, 0); av_dlog(NULL, " y:%d h:%d dir:%d\n", y, h, slice_dir);     /* copy the slice if needed for permission reasons */    if (link->src_buf) {        vsub = av_pix_fmt_descriptors[link->format].log2_chroma_h;         for (i = 0; i < 4; i++) {            if (link->src_buf->data[i]) {                src[i] = link->src_buf-> data[i] +                    (y >> (i==1 || i==2 ? vsub : 0)) * link->src_buf-> linesize[i];                dst[i] = link->cur_buf->data[i] +                    (y >> (i==1 || i==2 ? vsub : 0)) * link->cur_buf->linesize[i];            } else                src[i] = dst[i] = NULL;        }         for (i = 0; i < 4; i++) {            int planew =                av_image_get_linesize(link->format, link->cur_buf->video->w, i);             if (!src[i]) continue;             for (j = 0; j < h >> (i==1 || i==2 ? vsub : 0); j++) {                memcpy(dst[i], src[i], planew);                src[i] += link->src_buf->linesize[i];                dst[i] += link->cur_buf->linesize[i];            }        }    }     if (!(draw_slice = link->dstpad->draw_slice))        draw_slice = avfilter_default_draw_slice;    draw_slice(link, y, h, slice_dir);} void avfilter_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref){    void (*filter_samples)(AVFilterLink *, AVFilterBufferRef *);    AVFilterPad *dst = link->dstpad;     FF_DPRINTF_START(NULL, filter_samples); ff_dlog_link(NULL, link, 1);     if (!(filter_samples = dst->filter_samples))        filter_samples = avfilter_default_filter_samples;     /* prepare to copy the samples if the buffer has insufficient permissions */    if ((dst->min_perms & samplesref->perms) != dst->min_perms ||        dst->rej_perms & samplesref->perms) {         av_log(link->dst, AV_LOG_DEBUG,               "Copying audio data in avfilter (have perms %x, need %x, reject %x)\n",               samplesref->perms, link->dstpad->min_perms, link->dstpad->rej_perms); 

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