/* * Copyright (c) 2017 Gerion Entrup * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 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 General Public License for more details. * * You should have received a copy of the GNU 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. */ /** * @file * MPEG-7 video signature calculation and lookup filter * @see http://epubs.surrey.ac.uk/531590/1/MPEG-7%20Video%20Signature%20Author%27s%20Copy.pdf */ #include <float.h> #include "libavcodec/put_bits.h" #include "libavformat/avformat.h" #include "libavutil/opt.h" #include "libavutil/avstring.h" #include "libavutil/intreadwrite.h" #include "libavutil/timestamp.h" #include "avfilter.h" #include "internal.h" #include "signature.h" #include "signature_lookup.c" #define OFFSET(x) offsetof(SignatureContext, x) #define FLAGS AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM #define BLOCK_LCM (int64_t) 476985600 static const AVOption signature_options[] = { { "detectmode", "set the detectmode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64 = MODE_OFF}, 0, NB_LOOKUP_MODE-1, FLAGS, "mode" }, { "off", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = MODE_OFF}, 0, 0, .flags = FLAGS, "mode" }, { "full", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = MODE_FULL}, 0, 0, .flags = FLAGS, "mode" }, { "fast", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = MODE_FAST}, 0, 0, .flags = FLAGS, "mode" }, { "nb_inputs", "number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64 = 1}, 1, INT_MAX, FLAGS }, { "filename", "filename for output files", OFFSET(filename), AV_OPT_TYPE_STRING, {.str = ""}, 0, NB_FORMATS-1, FLAGS }, { "format", "set output format", OFFSET(format), AV_OPT_TYPE_INT, {.i64 = FORMAT_BINARY}, 0, 1, FLAGS , "format" }, { "binary", 0, 0, AV_OPT_TYPE_CONST, {.i64=FORMAT_BINARY}, 0, 0, FLAGS, "format" }, { "xml", 0, 0, AV_OPT_TYPE_CONST, {.i64=FORMAT_XML}, 0, 0, FLAGS, "format" }, { "th_d", "threshold to detect one word as similar", OFFSET(thworddist), AV_OPT_TYPE_INT, {.i64 = 9000}, 1, INT_MAX, FLAGS }, { "th_dc", "threshold to detect all words as similar", OFFSET(thcomposdist), AV_OPT_TYPE_INT, {.i64 = 60000}, 1, INT_MAX, FLAGS }, { "th_xh", "threshold to detect frames as similar", OFFSET(thl1), AV_OPT_TYPE_INT, {.i64 = 116}, 1, INT_MAX, FLAGS }, { "th_di", "minimum length of matching sequence in frames", OFFSET(thdi), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, FLAGS }, { "th_it", "threshold for relation of good to all frames", OFFSET(thit), AV_OPT_TYPE_DOUBLE, {.dbl = 0.5}, 0.0, 1.0, FLAGS }, { NULL } }; AVFILTER_DEFINE_CLASS(signature); /* all formats with a separate gray value */ static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_GRAY8, AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_NV12, AV_PIX_FMT_NV21, AV_PIX_FMT_NONE }; static int config_input(AVFilterLink *inlink) { AVFilterContext *ctx = inlink->dst; SignatureContext *sic = ctx->priv; StreamContext *sc = &(sic->streamcontexts[FF_INLINK_IDX(inlink)]); sc->time_base = inlink->time_base; /* test for overflow */ sc->divide = (((uint64_t) inlink->w/32) * (inlink->w/32 + 1) * (inlink->h/32 * inlink->h/32 + 1) > INT64_MAX / (BLOCK_LCM * 255)); if (sc->divide) { av_log(ctx, AV_LOG_WARNING, "Input dimension too high for precise calculation, numbers will be rounded.\n"); } sc->w = inlink->w; sc->h = inlink->h; return 0; } static int get_block_size(const Block *b) { return (b->to.y - b->up.y + 1) * (b->to.x - b->up.x + 1); } static uint64_t get_block_sum(StreamContext *sc, uint64_t intpic[32][32], const Block *b) { uint64_t sum = 0; int x0, y0, x1, y1; x0 = b->up.x; y0 = b->up.y; x1 = b->to.x; y1 = b->to.y; if (x0-1 >= 0 && y0-1 >= 0) { sum = intpic[y1][x1] + intpic[y0-1][x0-1] - intpic[y1][x0-1] - intpic[y0-1][x1]; } else if (x0-1 >= 0) { sum = intpic[y1][x1] - intpic[y1][x0-1]; } else if (y0-1 >= 0) { sum = intpic[y1][x1] - intpic[y0-1][x1]; } else { sum = intpic[y1][x1]; } return sum; } static int cmp(const void *x, const void *y) { const uint64_t *a = x, *b = y; return *a < *b ? -1 : ( *a > *b ? 1 : 0 ); } /** * sets the bit at position pos to 1 in data */ static void set_bit(uint8_t* data, size_t pos) { uint8_t mask = 1 << 7-(pos%8); data[pos/8] |= mask; } static int filter_frame(AVFilterLink *inlink, AVFrame *picref) { AVFilterContext *ctx = inlink->dst; SignatureContext *sic = ctx->priv; StreamContext *sc = &(sic->streamcontexts[FF_INLINK_IDX(inlink)]); FineSignature* fs; static const uint8_t pot3[5] = { 3*3*3*3, 3*3*3, 3*3, 3, 1 }; /* indexes of words : 210,217,219,274,334 44,175,233,270,273 57,70,103,237,269 100,285,295,337,354 101,102,111,275,296 s2usw = sorted to unsorted wordvec: 44 is at index 5, 57 at index 10... */ static const unsigned int wordvec[25] = {44,57,70,100,101,102,103,111,175,210,217,219,233,237,269,270,273,274,275,285,295,296,334,337,354}; static const uint8_t s2usw[25] = { 5,10,11, 15, 20, 21, 12, 22, 6, 0, 1, 2, 7, 13, 14, 8, 9, 3, 23, 16, 17, 24, 4, 18, 19}; uint8_t wordt2b[5] = { 0, 0, 0, 0, 0 }; /* word ternary to binary */ uint64_t intpic[32][32]; uint64_t rowcount; uint8_t *p = picref->data[0]; int inti, intj; int *intjlut; uint64_t conflist[DIFFELEM_SIZE]; int f = 0, g = 0, w = 0; int32_t dh1 = 1, dh2 = 1, dw1 = 1, dw2 = 1, a, b; int64_t denom; int i, j, k, ternary; uint64_t blocksum; int blocksize; int64_t th; /* threshold */ int64_t sum; int64_t precfactor = (sc->divide) ? 65536 : BLOCK_LCM; /* initialize fs */ if (sc->curfinesig) { fs = av_mallocz(sizeof(FineSignature)); if (!fs) return AVERROR(ENOMEM); sc->curfinesig->next = fs; fs->prev = sc->curfinesig; sc->curfinesig = fs; } else { fs = sc->curfinesig = sc->finesiglist; sc->curcoarsesig1->first = fs; } fs->pts = picref->pts; fs->index = sc->lastindex++; memset(intpic, 0, sizeof(uint64_t)*32*32); intjlut = av_malloc_array(inlink->w, sizeof(int)); if (!intjlut) return AVERROR(ENOMEM); for (i = 0; i < inlink->w; i++) { intjlut[i] = (i*32)/inlink->w; } for (i = 0; i < inlink->h; i++) { inti = (i*32)/inlink->h; for (j = 0; j < inlink->w; j++) { intj = intjlut[j]; intpic[inti][intj] += p[j]; } p += picref->linesize[0]; } av_freep(&intjlut); /* The following calculates a summed area table (intpic) and brings the numbers * in intpic to the same denominator. * So you only have to handle the numinator in the following sections. */ dh1 = inlink->h / 32; if (inlink->h % 32) dh2 = dh1 + 1; dw1 = inlink->w / 32; if (inlink->w % 32) dw2 = dw1 + 1; denom = (sc->divide) ? dh1 * dh2 * dw1 * dw2 : 1; for (i = 0; i < 32; i++) { rowcount = 0; a = 1; if (dh2 > 1) { a = ((inlink->h*(i+1))%32 == 0) ? (inlink->h*(i+1))/32 - 1 : (inlink->h*(i+1))/32; a -= ((inlink->h*i)%32 == 0) ? (inlink->h*i)/32 - 1 : (inlink->h*i)/32; a = (a == dh1)? dh2 : dh1; } for (j = 0; j < 32; j++) { b = 1; if (dw2 > 1) { b = ((inlink->w*(j+1))%32 == 0) ? (inlink->w*(j+1))/32 - 1 : (inlink->w*(j+1))/32; b -= ((inlink->w*j)%32 == 0) ? (inlink->w*j)/32 - 1 : (inlink->w*j)/32; b = (b == dw1)? dw2 : dw1; } rowcount += intpic[i][j] * a * b * precfactor / denom; if (i > 0) { intpic[i][j] = intpic[i-1][j] + rowcount; } else { intpic[i][j] = rowcount; } } } denom = (sc->divide) ? 1 : dh1 * dh2 * dw1 * dw2; for (i = 0; i < ELEMENT_COUNT; i++) { const ElemCat* elemcat = elements[i]; int64_t* elemsignature; uint64_t* sortsignature; elemsignature = av_malloc_array(elemcat->elem_count, sizeof(int64_t)); if (!elemsignature) return AVERROR(ENOMEM); sortsignature = av_malloc_array(elemcat->elem_count, sizeof(int64_t)); if (!sortsignature) { av_freep(&elemsignature); return AVERROR(ENOMEM); } for (j = 0; j < elemcat->elem_count; j++) { blocksum = 0; blocksize = 0; for (k = 0; k < elemcat->left_count; k++) { blocksum += get_block_sum(sc, intpic, &elemcat->blocks[j*elemcat->block_count+k]); blocksize += get_block_size(&elemcat->blocks[j*elemcat->block_count+k]); } sum = blocksum / blocksize; if (elemcat->av_elem) { sum -= 128 * precfactor * denom; } else { blocksum = 0; blocksize = 0; for (; k < elemcat->block_count; k++) { blocksum += get_block_sum(sc, intpic, &elemcat->blocks[j*elemcat->block_count+k]); blocksize += get_block_size(&elemcat->blocks[j*elemcat->block_count+k]); } sum -= blocksum / blocksize; conflist[g++] = FFABS(sum * 8 / (precfactor * denom)); } elemsignature[j] = sum; sortsignature[j] = FFABS(sum); } /* get threshold */ qsort(sortsignature, elemcat->elem_count, sizeof(uint64_t), cmp); th = sortsignature[(int) (elemcat->elem_count*0.333)]; /* ternarize */ for (j = 0; j < elemcat->elem_count; j++) { if (elemsignature[j] < -th) { ternary = 0; } else if (elemsignature[j] <= th) { ternary = 1; } else { ternary = 2; } fs->framesig[f/5] += ternary * pot3[f%5]; if (f == wordvec[w]) { fs->words[s2usw[w]/5] += ternary * pot3[wordt2b[s2usw[w]/5]++]; if (w < 24) w++; } f++; } av_freep(&elemsignature); av_freep(&sortsignature); } /* confidence */ qsort(conflist, DIFFELEM_SIZE, sizeof(uint64_t), cmp); fs->confidence = FFMIN(conflist[DIFFELEM_SIZE/2], 255); /* coarsesignature */ if (sc->coarsecount == 0) { if (sc->curcoarsesig2) { sc->curcoarsesig1 = av_mallocz(sizeof(CoarseSignature)); if (!sc->curcoarsesig1) return AVERROR(ENOMEM); sc->curcoarsesig1->first = fs; sc->curcoarsesig2->next = sc->curcoarsesig1; sc->coarseend = sc->curcoarsesig1; } } if (sc->coarsecount == 45) { sc->midcoarse = 1; sc->curcoarsesig2 = av_mallocz(sizeof(CoarseSignature)); if (!sc->curcoarsesig2) return AVERROR(ENOMEM); sc->curcoarsesig2->first = fs; sc->curcoarsesig1->next = sc->curcoarsesig2; sc->coarseend = sc->curcoarsesig2; } for (i = 0; i < 5; i++) { set_bit(sc->curcoarsesig1->data[i], fs->words[i]); } /* assuming the actual frame is the last */ sc->curcoarsesig1->last = fs; if (sc->midcoarse) { for (i = 0; i < 5; i++) { set_bit(sc->curcoarsesig2->data[i], fs->words[i]); } sc->curcoarsesig2->last = fs; } sc->coarsecount = (sc->coarsecount+1)%90; /* debug printing finesignature */ if (av_log_get_level() == AV_LOG_DEBUG) { av_log(ctx, AV_LOG_DEBUG, "input %d, confidence: %d\n", FF_INLINK_IDX(inlink), fs->confidence); av_log(ctx, AV_LOG_DEBUG, "words:"); for (i = 0; i < 5; i++) { av_log(ctx, AV_LOG_DEBUG, " %d:", fs->words[i] ); av_log(ctx, AV_LOG_DEBUG, " %d", fs->words[i] / pot3[0] ); for (j = 1; j < 5; j++) av_log(ctx, AV_LOG_DEBUG, ",%d", fs->words[i] % pot3[j-1] / pot3[j] ); av_log(ctx, AV_LOG_DEBUG, ";"); } av_log(ctx, AV_LOG_DEBUG, "\n"); av_log(ctx, AV_LOG_DEBUG, "framesignature:"); for (i = 0; i < SIGELEM_SIZE/5; i++) { av_log(ctx, AV_LOG_DEBUG, " %d", fs->framesig[i] / pot3[0] ); for (j = 1; j < 5; j++) av_log(ctx, AV_LOG_DEBUG, ",%d", fs->framesig[i] % pot3[j-1] / pot3[j] ); } av_log(ctx, AV_LOG_DEBUG, "\n"); } if (FF_INLINK_IDX(inlink) == 0) return ff_filter_frame(inlink->dst->outputs[0], picref); return 1; } static int xml_export(AVFilterContext *ctx, StreamContext *sc, const char* filename) { FineSignature* fs; CoarseSignature* cs; int i, j; FILE* f; unsigned int pot3[5] = { 3*3*3*3, 3*3*3, 3*3, 3, 1 }; f = avpriv_fopen_utf8(filename, "w"); if (!f) { int err = AVERROR(EINVAL); char buf[128]; av_strerror(err, buf, sizeof(buf)); av_log(ctx, AV_LOG_ERROR, "cannot open xml file %s: %s\n", filename, buf); return err; } /* header */ fprintf(f, "<?xml version='1.0' encoding='ASCII' ?>\n"); fprintf(f, "<Mpeg7 xmlns=\"urn:mpeg:mpeg7:schema:2001\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:schemaLocation=\"urn:mpeg:mpeg7:schema:2001 schema/Mpeg7-2001.xsd\">\n"); fprintf(f, " <DescriptionUnit xsi:type=\"DescriptorCollectionType\">\n"); fprintf(f, " <Descriptor xsi:type=\"VideoSignatureType\">\n"); fprintf(f, " <VideoSignatureRegion>\n"); fprintf(f, " <VideoSignatureSpatialRegion>\n"); fprintf(f, " <Pixel>0 0 </Pixel>\n"); fprintf(f, " <Pixel>%d %d </Pixel>\n", sc->w - 1, sc->h - 1); fprintf(f, " </VideoSignatureSpatialRegion>\n"); fprintf(f, " <StartFrameOfSpatialRegion>0</StartFrameOfSpatialRegion>\n"); /* hoping num is 1, other values are vague */ fprintf(f, " <MediaTimeUnit>%d</MediaTimeUnit>\n", sc->time_base.den / sc->time_base.num); fprintf(f, " <MediaTimeOfSpatialRegion>\n"); fprintf(f, " <StartMediaTimeOfSpatialRegion>0</StartMediaTimeOfSpatialRegion>\n"); fprintf(f, " <EndMediaTimeOfSpatialRegion>%" PRIu64 "</EndMediaTimeOfSpatialRegion>\n", sc->coarseend->last->pts); fprintf(f, " </MediaTimeOfSpatialRegion>\n"); /* coarsesignatures */ for (cs = sc->coarsesiglist; cs; cs = cs->next) { fprintf(f, " <VSVideoSegment>\n"); fprintf(f, " <StartFrameOfSegment>%" PRIu32 "</StartFrameOfSegment>\n", cs->first->index); fprintf(f, " <EndFrameOfSegment>%" PRIu32 "</EndFrameOfSegment>\n", cs->last->index); fprintf(f, " <MediaTimeOfSegment>\n"); fprintf(f, " <StartMediaTimeOfSegment>%" PRIu64 "</StartMediaTimeOfSegment>\n", cs->first->pts); fprintf(f, " <EndMediaTimeOfSegment>%" PRIu64 "</EndMediaTimeOfSegment>\n", cs->last->pts); fprintf(f, " </MediaTimeOfSegment>\n"); for (i = 0; i < 5; i++) { fprintf(f, " <BagOfWords>"); for (j = 0; j < 31; j++) { uint8_t n = cs->data[i][j]; if (j < 30) { fprintf(f, "%d %d %d %d %d %d %d %d ", (n & 0x80) >> 7, (n & 0x40) >> 6, (n & 0x20) >> 5, (n & 0x10) >> 4, (n & 0x08) >> 3, (n & 0x04) >> 2, (n & 0x02) >> 1, (n & 0x01)); } else { /* print only 3 bit in last byte */ fprintf(f, "%d %d %d ", (n & 0x80) >> 7, (n & 0x40) >> 6, (n & 0x20) >> 5); } } fprintf(f, "</BagOfWords>\n"); } fprintf(f, " </VSVideoSegment>\n"); } /* finesignatures */ for (fs = sc->finesiglist; fs; fs = fs->next) { fprintf(f, " <VideoFrame>\n"); fprintf(f, " <MediaTimeOfFrame>%" PRIu64 "</MediaTimeOfFrame>\n", fs->pts); /* confidence */ fprintf(f, " <FrameConfidence>%d</FrameConfidence>\n", fs->confidence); /* words */ fprintf(f, " <Word>"); for (i = 0; i < 5; i++) { fprintf(f, "%d ", fs->words[i]); if (i < 4) { fprintf(f, " "); } } fprintf(f, "</Word>\n"); /* framesignature */ fprintf(f, " <FrameSignature>"); for (i = 0; i< SIGELEM_SIZE/5; i++) { if (i > 0) { fprintf(f, " "); } fprintf(f, "%d ", fs->framesig[i] / pot3[0]); for (j = 1; j < 5; j++) fprintf(f, " %d ", fs->framesig[i] % pot3[j-1] / pot3[j] ); } fprintf(f, "</FrameSignature>\n"); fprintf(f, " </VideoFrame>\n"); } fprintf(f, " </VideoSignatureRegion>\n"); fprintf(f, " </Descriptor>\n"); fprintf(f, " </DescriptionUnit>\n"); fprintf(f, "</Mpeg7>\n"); fclose(f); return 0; } static int binary_export(AVFilterContext *ctx, StreamContext *sc, const char* filename) { FILE* f; FineSignature* fs; CoarseSignature* cs; uint32_t numofsegments = (sc->lastindex + 44)/45; int i, j; PutBitContext buf; /* buffer + header + coarsesignatures + finesignature */ int len = (512 + 6 * 32 + 3*16 + 2 + numofsegments * (4*32 + 1 + 5*243) + sc->lastindex * (2 + 32 + 6*8 + 608)) / 8; uint8_t* buffer = av_malloc_array(len, sizeof(uint8_t)); if (!buffer) return AVERROR(ENOMEM); f = avpriv_fopen_utf8(filename, "wb"); if (!f) { int err = AVERROR(EINVAL); char buf[128]; av_strerror(err, buf, sizeof(buf)); av_log(ctx, AV_LOG_ERROR, "cannot open file %s: %s\n", filename, buf); av_freep(&buffer); return err; } init_put_bits(&buf, buffer, len); put_bits32(&buf, 1); /* NumOfSpatial Regions, only 1 supported */ put_bits(&buf, 1, 1); /* SpatialLocationFlag, always the whole image */ put_bits32(&buf, 0); /* PixelX,1 PixelY,1, 0,0 */ put_bits(&buf, 16, sc->w-1 & 0xFFFF); /* PixelX,2 */ put_bits(&buf, 16, sc->h-1 & 0xFFFF); /* PixelY,2 */ put_bits32(&buf, 0); /* StartFrameOfSpatialRegion */ put_bits32(&buf, sc->lastindex); /* NumOfFrames */ /* hoping num is 1, other values are vague */ /* den/num might be greater than 16 bit, so cutting it */ put_bits(&buf, 16, 0xFFFF & (sc->time_base.den / sc->time_base.num)); /* MediaTimeUnit */ put_bits(&buf, 1, 1); /* MediaTimeFlagOfSpatialRegion */ put_bits32(&buf, 0); /* StartMediaTimeOfSpatialRegion */ put_bits32(&buf, 0xFFFFFFFF & sc->coarseend->last->pts); /* EndMediaTimeOfSpatialRegion */ put_bits32(&buf, numofsegments); /* NumOfSegments */ /* coarsesignatures */ for (cs = sc->coarsesiglist; cs; cs = cs->next) { put_bits32(&buf, cs->first->index); /* StartFrameOfSegment */ put_bits32(&buf, cs->last->index); /* EndFrameOfSegment */ put_bits(&buf, 1, 1); /* MediaTimeFlagOfSegment */ put_bits32(&buf, 0xFFFFFFFF & cs->first->pts); /* StartMediaTimeOfSegment */ put_bits32(&buf, 0xFFFFFFFF & cs->last->pts); /* EndMediaTimeOfSegment */ for (i = 0; i < 5; i++) { /* put 243 bits ( = 7 * 32 + 19 = 8 * 28 + 19) into buffer */ for (j = 0; j < 30; j++) { put_bits(&buf, 8, cs->data[i][j]); } put_bits(&buf, 3, cs->data[i][30] >> 5); } } /* finesignatures */ put_bits(&buf, 1, 0); /* CompressionFlag, only 0 supported */ for (fs = sc->finesiglist; fs; fs = fs->next) { put_bits(&buf, 1, 1); /* MediaTimeFlagOfFrame */ put_bits32(&buf, 0xFFFFFFFF & fs->pts); /* MediaTimeOfFrame */ put_bits(&buf, 8, fs->confidence); /* FrameConfidence */ for (i = 0; i < 5; i++) { put_bits(&buf, 8, fs->words[i]); /* Words */ } /* framesignature */ for (i = 0; i < SIGELEM_SIZE/5; i++) { put_bits(&buf, 8, fs->framesig[i]); } } flush_put_bits(&buf); fwrite(buffer, 1, put_bytes_output(&buf), f); fclose(f); av_freep(&buffer); return 0; } static int export(AVFilterContext *ctx, StreamContext *sc, int input) { SignatureContext* sic = ctx->priv; char filename[1024]; if (sic->nb_inputs > 1) { /* error already handled */ av_assert0(av_get_frame_filename(filename, sizeof(filename), sic->filename, input) == 0); } else { if (av_strlcpy(filename, sic->filename, sizeof(filename)) >= sizeof(filename)) return AVERROR(EINVAL); } if (sic->format == FORMAT_XML) { return xml_export(ctx, sc, filename); } else { return binary_export(ctx, sc, filename); } } static int request_frame(AVFilterLink *outlink) { AVFilterContext *ctx = outlink->src; SignatureContext *sic = ctx->priv; StreamContext *sc, *sc2; MatchingInfo match; int i, j, ret; int lookup = 1; /* indicates wheather EOF of all files is reached */ /* process all inputs */ for (i = 0; i < sic->nb_inputs; i++){ sc = &(sic->streamcontexts[i]); ret = ff_request_frame(ctx->inputs[i]); /* return if unexpected error occurs in input stream */ if (ret < 0 && ret != AVERROR_EOF) return ret; /* export signature at EOF */ if (ret == AVERROR_EOF && !sc->exported) { /* export if wanted */ if (strlen(sic->filename) > 0) { if (export(ctx, sc, i) < 0) return ret; } sc->exported = 1; } lookup &= sc->exported; } /* signature lookup */ if (lookup && sic->mode != MODE_OFF) { /* iterate over every pair */ for (i = 0; i < sic->nb_inputs; i++) { sc = &(sic->streamcontexts[i]); for (j = i+1; j < sic->nb_inputs; j++) { sc2 = &(sic->streamcontexts[j]); match = lookup_signatures(ctx, sic, sc, sc2, sic->mode); if (match.score != 0) { av_log(ctx, AV_LOG_INFO, "matching of video %d at %f and %d at %f, %d frames matching\n", i, ((double) match.first->pts * sc->time_base.num) / sc->time_base.den, j, ((double) match.second->pts * sc2->time_base.num) / sc2->time_base.den, match.matchframes); if (match.whole) av_log(ctx, AV_LOG_INFO, "whole video matching\n"); } else { av_log(ctx, AV_LOG_INFO, "no matching of video %d and %d\n", i, j); } } } } return ret; } static av_cold int init(AVFilterContext *ctx) { SignatureContext *sic = ctx->priv; StreamContext *sc; int i, ret; char tmp[1024]; sic->streamcontexts = av_mallocz(sic->nb_inputs * sizeof(StreamContext)); if (!sic->streamcontexts) return AVERROR(ENOMEM); for (i = 0; i < sic->nb_inputs; i++) { AVFilterPad pad = { .type = AVMEDIA_TYPE_VIDEO, .name = av_asprintf("in%d", i), .config_props = config_input, .filter_frame = filter_frame, }; if (!pad.name) return AVERROR(ENOMEM); if ((ret = ff_append_inpad_free_name(ctx, &pad)) < 0) return ret; sc = &(sic->streamcontexts[i]); sc->lastindex = 0; sc->finesiglist = av_mallocz(sizeof(FineSignature)); if (!sc->finesiglist) return AVERROR(ENOMEM); sc->curfinesig = NULL; sc->coarsesiglist = av_mallocz(sizeof(CoarseSignature)); if (!sc->coarsesiglist) return AVERROR(ENOMEM); sc->curcoarsesig1 = sc->coarsesiglist; sc->coarseend = sc->coarsesiglist; sc->coarsecount = 0; sc->midcoarse = 0; } /* check filename */ if (sic->nb_inputs > 1 && strlen(sic->filename) > 0 && av_get_frame_filename(tmp, sizeof(tmp), sic->filename, 0) == -1) { av_log(ctx, AV_LOG_ERROR, "The filename must contain %%d or %%0nd, if you have more than one input.\n"); return AVERROR(EINVAL); } return 0; } static av_cold void uninit(AVFilterContext *ctx) { SignatureContext *sic = ctx->priv; StreamContext *sc; void* tmp; FineSignature* finsig; CoarseSignature* cousig; int i; /* free the lists */ if (sic->streamcontexts != NULL) { for (i = 0; i < sic->nb_inputs; i++) { sc = &(sic->streamcontexts[i]); finsig = sc->finesiglist; cousig = sc->coarsesiglist; while (finsig) { tmp = finsig; finsig = finsig->next; av_freep(&tmp); } sc->finesiglist = NULL; while (cousig) { tmp = cousig; cousig = cousig->next; av_freep(&tmp); } sc->coarsesiglist = NULL; } av_freep(&sic->streamcontexts); } } static int config_output(AVFilterLink *outlink) { AVFilterContext *ctx = outlink->src; AVFilterLink *inlink = ctx->inputs[0]; outlink->time_base = inlink->time_base; outlink->frame_rate = inlink->frame_rate; outlink->sample_aspect_ratio = inlink->sample_aspect_ratio; outlink->w = inlink->w; outlink->h = inlink->h; return 0; } static const AVFilterPad signature_outputs[] = { { .name = "default", .type = AVMEDIA_TYPE_VIDEO, .request_frame = request_frame, .config_props = config_output, }, }; const AVFilter ff_vf_signature = { .name = "signature", .description = NULL_IF_CONFIG_SMALL("Calculate the MPEG-7 video signature"), .priv_size = sizeof(SignatureContext), .priv_class = &signature_class, .init = init, .uninit = uninit, FILTER_OUTPUTS(signature_outputs), .inputs = NULL, FILTER_PIXFMTS_ARRAY(pix_fmts), .flags = AVFILTER_FLAG_DYNAMIC_INPUTS, };