/* * Copyright (C) 2015 Pedro Arthur <bygrandao@gmail.com> * * 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/mem.h"#include "swscale_internal.h" static void free_lines(SwsSlice *s){    int i;    for (i = 0; i < 2; ++i) {        int n = s->plane[i].available_lines;        int j;        for (j = 0; j < n; ++j) {            av_freep(&s->plane[i].line[j]);            if (s->is_ring)               s->plane[i].line[j+n] = NULL;        }    }     for (i = 0; i < 4; ++i)        memset(s->plane[i].line, 0, sizeof(uint8_t*) * s->plane[i].available_lines * (s->is_ring ? 3 : 1));    s->should_free_lines = 0;} /* slice lines contains extra bytes for vectorial code thus @size is the allocated memory size and @width is the number of pixels*/static int alloc_lines(SwsSlice *s, int size, int width){    int i;    int idx[2] = {3, 2};     s->should_free_lines = 1;    s->width = width;     for (i = 0; i < 2; ++i) {        int n = s->plane[i].available_lines;        int j;        int ii = idx[i];         av_assert0(n == s->plane[ii].available_lines);        for (j = 0; j < n; ++j) {            // chroma plane line U and V are expected to be contiguous in memory            // by mmx vertical scaler code            s->plane[i].line[j] = av_mallocz(size * 2 + 32);            if (!s->plane[i].line[j]) {                free_lines(s);                return AVERROR(ENOMEM);            }            s->plane[ii].line[j] = s->plane[i].line[j] + size + 16;            if (s->is_ring) {               s->plane[i].line[j+n] = s->plane[i].line[j];               s->plane[ii].line[j+n] = s->plane[ii].line[j];            }        }    }     return 0;} static int alloc_slice(SwsSlice *s, enum AVPixelFormat fmt, int lumLines, int chrLines, int h_sub_sample, int v_sub_sample, int ring){    int i;    int size[4] = { lumLines,                    chrLines,                    chrLines,                    lumLines };     s->h_chr_sub_sample = h_sub_sample;    s->v_chr_sub_sample = v_sub_sample;    s->fmt = fmt;    s->is_ring = ring;    s->should_free_lines = 0;     for (i = 0; i < 4; ++i) {        int n = size[i] * ( ring == 0 ? 1 : 3);        s->plane[i].line = av_calloc(n, sizeof(*s->plane[i].line));        if (!s->plane[i].line)            return AVERROR(ENOMEM);         s->plane[i].tmp = ring ? s->plane[i].line + size[i] * 2 : NULL;        s->plane[i].available_lines = size[i];        s->plane[i].sliceY = 0;        s->plane[i].sliceH = 0;    }    return 0;} static void free_slice(SwsSlice *s){    int i;    if (s) {        if (s->should_free_lines)            free_lines(s);        for (i = 0; i < 4; ++i) {            av_freep(&s->plane[i].line);            s->plane[i].tmp = NULL;        }    }} int ff_rotate_slice(SwsSlice *s, int lum, int chr){    int i;    if (lum) {        for (i = 0; i < 4; i+=3) {            int n = s->plane[i].available_lines;            int l = lum - s->plane[i].sliceY;             if (l >= n * 2) {                s->plane[i].sliceY += n;                s->plane[i].sliceH -= n;            }        }    }    if (chr) {        for (i = 1; i < 3; ++i) {            int n = s->plane[i].available_lines;            int l = chr - s->plane[i].sliceY;             if (l >= n * 2) {                s->plane[i].sliceY += n;                s->plane[i].sliceH -= n;            }        }    }    return 0;} int ff_init_slice_from_src(SwsSlice * s, uint8_t *const src[4], const int stride[4],                           int srcW, int lumY, int lumH, int chrY, int chrH, int relative){    int i = 0;     const int start[4] = {lumY,                          chrY,                          chrY,                          lumY};     const int end[4] = {lumY +lumH,                        chrY + chrH,                        chrY + chrH,                        lumY + lumH};     s->width = srcW;     for (i = 0; i < 4 && src[i] != NULL; ++i) {        uint8_t *const src_i = src[i] + (relative ? 0 : start[i]) * stride[i];        int j;        int first = s->plane[i].sliceY;        int n = s->plane[i].available_lines;        int lines = end[i] - start[i];        int tot_lines = end[i] - first;         if (start[i] >= first && n >= tot_lines) {            s->plane[i].sliceH = FFMAX(tot_lines, s->plane[i].sliceH);            for (j = 0; j < lines; j+= 1)                s->plane[i].line[start[i] - first + j] = src_i +  j * stride[i];        } else {            s->plane[i].sliceY = start[i];            lines = lines > n ? n : lines;            s->plane[i].sliceH = lines;            for (j = 0; j < lines; j+= 1)                s->plane[i].line[j] = src_i +  j * stride[i];        }     }     return 0;} static void fill_ones(SwsSlice *s, int n, int bpc){    int i, j, k, size, end;     for (i = 0; i < 4; ++i) {        size = s->plane[i].available_lines;        for (j = 0; j < size; ++j) {            if (bpc >= 16) {                end = (n>>1) + 1;                for (k = 0; k < end; ++k)                    ((int32_t*)(s->plane[i].line[j]))[k] = 1<<18;            } else {                end = n + 1;                for (k = 0; k < end; ++k)                    ((int16_t*)(s->plane[i].line[j]))[k] = 1<<14;            }        }    }} /* Calculates the minimum ring buffer size, it should be able to store vFilterSize more n lines where n is the max difference between each adjacent slice which outputs a line. The n lines are needed only when there is not enough src lines to output a single dst line, then we should buffer these lines to process them on the next call to scale.*/static void get_min_buffer_size(SwsInternal *c, int *out_lum_size, int *out_chr_size){    int lumY;    int dstH = c->opts.dst_h;    int chrDstH = c->chrDstH;    int *lumFilterPos = c->vLumFilterPos;    int *chrFilterPos = c->vChrFilterPos;    int lumFilterSize = c->vLumFilterSize;    int chrFilterSize = c->vChrFilterSize;    int chrSubSample = c->chrSrcVSubSample;     *out_lum_size = lumFilterSize;    *out_chr_size = chrFilterSize;     for (lumY = 0; lumY < dstH; lumY++) {        int chrY      = (int64_t)lumY * chrDstH / dstH;        int nextSlice = FFMAX(lumFilterPos[lumY] + lumFilterSize - 1,                              ((chrFilterPos[chrY] + chrFilterSize - 1)                               << chrSubSample));         nextSlice >>= chrSubSample;        nextSlice <<= chrSubSample;        (*out_lum_size) = FFMAX((*out_lum_size), nextSlice - lumFilterPos[lumY]);        (*out_chr_size) = FFMAX((*out_chr_size), (nextSlice >> chrSubSample) - chrFilterPos[chrY]);    }}   int ff_init_filters(SwsInternal * c){    int i;    int index;    int num_ydesc;    int num_cdesc;    int num_vdesc = isPlanarYUV(c->opts.dst_format) && !isGray(c->opts.dst_format) ? 2 : 1;    int need_lum_conv = c->lumToYV12 || c->readLumPlanar || c->alpToYV12 || c->readAlpPlanar;    int need_chr_conv = c->chrToYV12 || c->readChrPlanar;    int need_gamma = c->is_internal_gamma;    int srcIdx, dstIdx;    int dst_stride = FFALIGN(c->opts.dst_w * sizeof(int16_t) + 66, 16);     uint32_t * pal = usePal(c->opts.src_format) ? c->pal_yuv : (uint32_t*)c->input_rgb2yuv_table;    int res = 0;     int lumBufSize;    int chrBufSize;     get_min_buffer_size(c, &lumBufSize, &chrBufSize);    lumBufSize = FFMAX(lumBufSize, c->vLumFilterSize + MAX_LINES_AHEAD);    chrBufSize = FFMAX(chrBufSize, c->vChrFilterSize + MAX_LINES_AHEAD);     if (c->dstBpc == 16)        dst_stride <<= 1;     if (c->dstBpc == 32)        dst_stride <<= 2;     num_ydesc = need_lum_conv ? 2 : 1;    num_cdesc = need_chr_conv ? 2 : 1;     c->numSlice = FFMAX(num_ydesc, num_cdesc) + 2;    c->numDesc = num_ydesc + num_cdesc + num_vdesc + (need_gamma ? 2 : 0);    c->descIndex[0] = num_ydesc + (need_gamma ? 1 : 0);    c->descIndex[1] = num_ydesc + num_cdesc + (need_gamma ? 1 : 0);     if (isFloat16(c->opts.src_format)) {        c->h2f_tables = av_malloc(sizeof(*c->h2f_tables));        if (!c->h2f_tables)            return AVERROR(ENOMEM);        ff_init_half2float_tables(c->h2f_tables);        c->input_opaque = c->h2f_tables;    }     c->desc  = av_calloc(c->numDesc,  sizeof(*c->desc));    if (!c->desc)        return AVERROR(ENOMEM);    c->slice = av_calloc(c->numSlice, sizeof(*c->slice));    if (!c->slice) {        res = AVERROR(ENOMEM);        goto cleanup;    }     res = alloc_slice(&c->slice[0], c->opts.src_format, c->opts.src_h, c->chrSrcH, c->chrSrcHSubSample, c->chrSrcVSubSample, 0);    if (res < 0) goto cleanup;    for (i = 1; i < c->numSlice-2; ++i) {        res = alloc_slice(&c->slice[i], c->opts.src_format, lumBufSize, chrBufSize, c->chrSrcHSubSample, c->chrSrcVSubSample, 0);        if (res < 0) goto cleanup;        res = alloc_lines(&c->slice[i], FFALIGN(c->opts.src_w*2+78, 16), c->opts.src_w);        if (res < 0) goto cleanup;    }    // horizontal scaler output    res = alloc_slice(&c->slice[i], c->opts.src_format, lumBufSize, chrBufSize, c->chrDstHSubSample, c->chrDstVSubSample, 1);    if (res < 0) goto cleanup;    res = alloc_lines(&c->slice[i], dst_stride, c->opts.dst_w);    if (res < 0) goto cleanup;     fill_ones(&c->slice[i], dst_stride>>1, c->dstBpc);     // vertical scaler output    ++i;    res = alloc_slice(&c->slice[i], c->opts.dst_format, c->opts.dst_h, c->chrDstH, c->chrDstHSubSample, c->chrDstVSubSample, 0);    if (res < 0) goto cleanup;     index = 0;    srcIdx = 0;    dstIdx = 1;     if (need_gamma) {        res = ff_init_gamma_convert(c->desc + index, c->slice + srcIdx, c->inv_gamma);        if (res < 0) goto cleanup;        ++index;    }     if (need_lum_conv) {        res = ff_init_desc_fmt_convert(&c->desc[index], &c->slice[srcIdx], &c->slice[dstIdx], pal);        if (res < 0) goto cleanup;        c->desc[index].alpha = c->needAlpha;        ++index;        srcIdx = dstIdx;    }      dstIdx = FFMAX(num_ydesc, num_cdesc);    res = ff_init_desc_hscale(&c->desc[index], &c->slice[srcIdx], &c->slice[dstIdx], c->hLumFilter, c->hLumFilterPos, c->hLumFilterSize, c->lumXInc);    if (res < 0) goto cleanup;    c->desc[index].alpha = c->needAlpha;      ++index;    {        srcIdx = 0;        dstIdx = 1;        if (need_chr_conv) {            res = ff_init_desc_cfmt_convert(&c->desc[index], &c->slice[srcIdx], &c->slice[dstIdx], pal);            if (res < 0) goto cleanup;            ++index;            srcIdx = dstIdx;        }         dstIdx = FFMAX(num_ydesc, num_cdesc);        if (c->needs_hcscale)            res = ff_init_desc_chscale(&c->desc[index], &c->slice[srcIdx], &c->slice[dstIdx], c->hChrFilter, c->hChrFilterPos, c->hChrFilterSize, c->chrXInc);        else            res = ff_init_desc_no_chr(&c->desc[index], &c->slice[srcIdx], &c->slice[dstIdx]);        if (res < 0) goto cleanup;    }     ++index;    {        srcIdx = c->numSlice - 2;        dstIdx = c->numSlice - 1;        res = ff_init_vscale(c, c->desc + index, c->slice + srcIdx, c->slice + dstIdx);        if (res < 0) goto cleanup;    }     ++index;    if (need_gamma) {        res = ff_init_gamma_convert(c->desc + index, c->slice + dstIdx, c->gamma);        if (res < 0) goto cleanup;    }     return 0; cleanup:    ff_free_filters(c);    return res;} int ff_free_filters(SwsInternal *c){    int i;    if (c->desc) {        for (i = 0; i < c->numDesc; ++i)            av_freep(&c->desc[i].instance);        av_freep(&c->desc);    }     if (c->slice) {        for (i = 0; i < c->numSlice; ++i)            free_slice(&c->slice[i]);        av_freep(&c->slice);    }    av_freep(&c->h2f_tables);    return 0;}