| /* |
| * 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 "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 vetorial 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_malloc(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_mallocz_array(sizeof(uint8_t*), n); |
| 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 *src[4], int stride[4], int srcW, int lumY, int lumH, int chrY, int chrH) |
| { |
| 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; ++i) { |
| int j; |
| int lines = end[i]; |
| lines = s->plane[i].available_lines < lines ? s->plane[i].available_lines : lines; |
| |
| if (end[i] > s->plane[i].sliceY+s->plane[i].sliceH) { |
| if (start[i] <= s->plane[i].sliceY+1) |
| s->plane[i].sliceY = FFMIN(start[i], s->plane[i].sliceY); |
| else |
| s->plane[i].sliceY = start[i]; |
| s->plane[i].sliceH = end[i] - s->plane[i].sliceY; |
| } else { |
| if (end[i] >= s->plane[i].sliceY) |
| s->plane[i].sliceH = s->plane[i].sliceY + s->plane[i].sliceH - start[i]; |
| else |
| s->plane[i].sliceH = end[i] - start[i]; |
| s->plane[i].sliceY = start[i]; |
| } |
| |
| for (j = start[i]; j < lines; j+= 1) |
| s->plane[i].line[j] = src[i] + (start[i] + j) * stride[i]; |
| |
| } |
| |
| return 0; |
| } |
| |
| static void fill_ones(SwsSlice *s, int n, int is16bit) |
| { |
| int i; |
| for (i = 0; i < 4; ++i) { |
| int j; |
| int size = s->plane[i].available_lines; |
| for (j = 0; j < size; ++j) { |
| int k; |
| int end = is16bit ? n>>1: n; |
| // fill also one extra element |
| end += 1; |
| if (is16bit) |
| for (k = 0; k < end; ++k) |
| ((int32_t*)(s->plane[i].line[j]))[k] = 1<<18; |
| else |
| for (k = 0; k < end; ++k) |
| ((int16_t*)(s->plane[i].line[j]))[k] = 1<<14; |
| } |
| } |
| } |
| |
| int ff_init_filters(SwsContext * c) |
| { |
| int i; |
| int index; |
| int num_ydesc; |
| int num_cdesc; |
| int num_vdesc = isPlanarYUV(c->dstFormat) && !isGray(c->dstFormat) ? 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->dstW * sizeof(int16_t) + 66, 16); |
| |
| uint32_t * pal = usePal(c->srcFormat) ? c->pal_yuv : (uint32_t*)c->input_rgb2yuv_table; |
| int res = 0; |
| |
| if (c->dstBpc == 16) |
| dst_stride <<= 1; |
| |
| 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); |
| |
| |
| |
| c->desc = av_mallocz_array(sizeof(SwsFilterDescriptor), c->numDesc); |
| if (!c->desc) |
| return AVERROR(ENOMEM); |
| c->slice = av_mallocz_array(sizeof(SwsSlice), c->numSlice); |
| |
| |
| res = alloc_slice(&c->slice[0], c->srcFormat, c->srcH, 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->srcFormat, c->vLumFilterSize + MAX_LINES_AHEAD, c->vChrFilterSize + MAX_LINES_AHEAD, c->chrSrcHSubSample, c->chrSrcVSubSample, 0); |
| if (res < 0) goto cleanup; |
| res = alloc_lines(&c->slice[i], FFALIGN(c->srcW*2+78, 16), c->srcW); |
| if (res < 0) goto cleanup; |
| } |
| // horizontal scaler output |
| res = alloc_slice(&c->slice[i], c->srcFormat, c->vLumFilterSize + MAX_LINES_AHEAD, c->vChrFilterSize + MAX_LINES_AHEAD, c->chrDstHSubSample, c->chrDstVSubSample, 1); |
| if (res < 0) goto cleanup; |
| res = alloc_lines(&c->slice[i], dst_stride, c->dstW); |
| if (res < 0) goto cleanup; |
| |
| fill_ones(&c->slice[i], dst_stride>>1, c->dstBpc == 16); |
| |
| // vertical scaler output |
| ++i; |
| res = alloc_slice(&c->slice[i], c->dstFormat, c->dstH, 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->alpPixBuf != 0; |
| ++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->alpPixBuf != 0; |
| |
| |
| ++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(SwsContext *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); |
| } |
| return 0; |
| } |