mirror of https://git.ffmpeg.org/ffmpeg.git
554 lines
18 KiB
C
554 lines
18 KiB
C
/*
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* Copyright (c) 2021 Paul B Mahol
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* OpenEXR encoder
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*/
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#include <float.h>
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#include <zlib.h>
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#include "libavutil/avassert.h"
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#include "libavutil/opt.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/pixdesc.h"
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#include "avcodec.h"
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#include "bytestream.h"
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#include "encode.h"
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#include "internal.h"
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#include "float2half.h"
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enum ExrCompr {
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EXR_RAW,
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EXR_RLE,
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EXR_ZIP1,
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EXR_ZIP16,
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EXR_NBCOMPR,
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};
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enum ExrPixelType {
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EXR_UINT,
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EXR_HALF,
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EXR_FLOAT,
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EXR_UNKNOWN,
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};
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static const char abgr_chlist[4] = { 'A', 'B', 'G', 'R' };
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static const char bgr_chlist[4] = { 'B', 'G', 'R', 'A' };
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static const uint8_t gbra_order[4] = { 3, 1, 0, 2 };
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static const uint8_t gbr_order[4] = { 1, 0, 2, 0 };
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typedef struct EXRScanlineData {
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uint8_t *compressed_data;
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unsigned int compressed_size;
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uint8_t *uncompressed_data;
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unsigned int uncompressed_size;
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uint8_t *tmp;
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unsigned int tmp_size;
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int64_t actual_size;
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} EXRScanlineData;
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typedef struct EXRContext {
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const AVClass *class;
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int compression;
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int pixel_type;
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int planes;
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int nb_scanlines;
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int scanline_height;
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float gamma;
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const char *ch_names;
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const uint8_t *ch_order;
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PutByteContext pb;
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EXRScanlineData *scanline;
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uint16_t basetable[512];
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uint8_t shifttable[512];
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} EXRContext;
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static int encode_init(AVCodecContext *avctx)
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{
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EXRContext *s = avctx->priv_data;
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float2half_tables(s->basetable, s->shifttable);
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switch (avctx->pix_fmt) {
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case AV_PIX_FMT_GBRPF32:
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s->planes = 3;
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s->ch_names = bgr_chlist;
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s->ch_order = gbr_order;
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break;
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case AV_PIX_FMT_GBRAPF32:
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s->planes = 4;
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s->ch_names = abgr_chlist;
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s->ch_order = gbra_order;
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break;
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default:
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av_assert0(0);
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}
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switch (s->compression) {
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case EXR_RAW:
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case EXR_RLE:
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case EXR_ZIP1:
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s->scanline_height = 1;
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s->nb_scanlines = avctx->height;
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break;
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case EXR_ZIP16:
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s->scanline_height = 16;
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s->nb_scanlines = (avctx->height + s->scanline_height - 1) / s->scanline_height;
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break;
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default:
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av_assert0(0);
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}
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s->scanline = av_calloc(s->nb_scanlines, sizeof(*s->scanline));
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if (!s->scanline)
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return AVERROR(ENOMEM);
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return 0;
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}
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static int encode_close(AVCodecContext *avctx)
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{
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EXRContext *s = avctx->priv_data;
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for (int y = 0; y < s->nb_scanlines && s->scanline; y++) {
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EXRScanlineData *scanline = &s->scanline[y];
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av_freep(&scanline->tmp);
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av_freep(&scanline->compressed_data);
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av_freep(&scanline->uncompressed_data);
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}
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av_freep(&s->scanline);
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return 0;
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}
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static void reorder_pixels(uint8_t *dst, const uint8_t *src, ptrdiff_t size)
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{
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const ptrdiff_t half_size = (size + 1) / 2;
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uint8_t *t1 = dst;
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uint8_t *t2 = dst + half_size;
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for (ptrdiff_t i = 0; i < half_size; i++) {
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t1[i] = *(src++);
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t2[i] = *(src++);
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}
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}
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static void predictor(uint8_t *src, ptrdiff_t size)
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{
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int p = src[0];
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for (ptrdiff_t i = 1; i < size; i++) {
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int d = src[i] - p + 384;
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p = src[i];
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src[i] = d;
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}
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}
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static int64_t rle_compress(uint8_t *out, int64_t out_size,
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const uint8_t *in, int64_t in_size)
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{
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int64_t i = 0, o = 0, run = 1, copy = 0;
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while (i < in_size) {
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while (i + run < in_size && in[i] == in[i + run] && run < 128)
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run++;
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if (run >= 3) {
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if (o + 2 >= out_size)
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return -1;
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out[o++] = run - 1;
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out[o++] = in[i];
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i += run;
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} else {
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if (i + run < in_size)
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copy += run;
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while (i + copy < in_size && copy < 127 && in[i + copy] != in[i + copy - 1])
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copy++;
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if (o + 1 + copy >= out_size)
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return -1;
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out[o++] = -copy;
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for (int x = 0; x < copy; x++)
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out[o + x] = in[i + x];
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o += copy;
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i += copy;
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copy = 0;
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}
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run = 1;
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}
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return o;
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}
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static int encode_scanline_rle(EXRContext *s, const AVFrame *frame)
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{
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const int64_t element_size = s->pixel_type == EXR_HALF ? 2LL : 4LL;
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for (int y = 0; y < frame->height; y++) {
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EXRScanlineData *scanline = &s->scanline[y];
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int64_t tmp_size = element_size * s->planes * frame->width;
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int64_t max_compressed_size = tmp_size * 3 / 2;
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av_fast_padded_malloc(&scanline->uncompressed_data, &scanline->uncompressed_size, tmp_size);
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if (!scanline->uncompressed_data)
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return AVERROR(ENOMEM);
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av_fast_padded_malloc(&scanline->tmp, &scanline->tmp_size, tmp_size);
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if (!scanline->tmp)
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return AVERROR(ENOMEM);
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av_fast_padded_malloc(&scanline->compressed_data, &scanline->compressed_size, max_compressed_size);
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if (!scanline->compressed_data)
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return AVERROR(ENOMEM);
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switch (s->pixel_type) {
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case EXR_FLOAT:
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for (int p = 0; p < s->planes; p++) {
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int ch = s->ch_order[p];
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memcpy(scanline->uncompressed_data + frame->width * 4 * p,
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frame->data[ch] + y * frame->linesize[ch], frame->width * 4);
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}
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break;
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case EXR_HALF:
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for (int p = 0; p < s->planes; p++) {
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int ch = s->ch_order[p];
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uint16_t *dst = (uint16_t *)(scanline->uncompressed_data + frame->width * 2 * p);
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uint32_t *src = (uint32_t *)(frame->data[ch] + y * frame->linesize[ch]);
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for (int x = 0; x < frame->width; x++)
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dst[x] = float2half(src[x], s->basetable, s->shifttable);
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}
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break;
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}
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reorder_pixels(scanline->tmp, scanline->uncompressed_data, tmp_size);
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predictor(scanline->tmp, tmp_size);
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scanline->actual_size = rle_compress(scanline->compressed_data,
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max_compressed_size,
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scanline->tmp, tmp_size);
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if (scanline->actual_size <= 0 || scanline->actual_size >= tmp_size) {
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FFSWAP(uint8_t *, scanline->uncompressed_data, scanline->compressed_data);
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FFSWAP(int, scanline->uncompressed_size, scanline->compressed_size);
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scanline->actual_size = tmp_size;
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}
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}
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return 0;
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}
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static int encode_scanline_zip(EXRContext *s, const AVFrame *frame)
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{
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const int64_t element_size = s->pixel_type == EXR_HALF ? 2LL : 4LL;
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for (int y = 0; y < s->nb_scanlines; y++) {
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EXRScanlineData *scanline = &s->scanline[y];
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const int scanline_height = FFMIN(s->scanline_height, frame->height - y * s->scanline_height);
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int64_t tmp_size = element_size * s->planes * frame->width * scanline_height;
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int64_t max_compressed_size = tmp_size * 3 / 2;
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unsigned long actual_size, source_size;
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av_fast_padded_malloc(&scanline->uncompressed_data, &scanline->uncompressed_size, tmp_size);
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if (!scanline->uncompressed_data)
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return AVERROR(ENOMEM);
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av_fast_padded_malloc(&scanline->tmp, &scanline->tmp_size, tmp_size);
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if (!scanline->tmp)
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return AVERROR(ENOMEM);
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av_fast_padded_malloc(&scanline->compressed_data, &scanline->compressed_size, max_compressed_size);
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if (!scanline->compressed_data)
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return AVERROR(ENOMEM);
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switch (s->pixel_type) {
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case EXR_FLOAT:
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for (int l = 0; l < scanline_height; l++) {
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const int scanline_size = frame->width * 4 * s->planes;
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for (int p = 0; p < s->planes; p++) {
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int ch = s->ch_order[p];
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memcpy(scanline->uncompressed_data + scanline_size * l + p * frame->width * 4,
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frame->data[ch] + (y * s->scanline_height + l) * frame->linesize[ch],
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frame->width * 4);
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}
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}
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break;
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case EXR_HALF:
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for (int l = 0; l < scanline_height; l++) {
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const int scanline_size = frame->width * 2 * s->planes;
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for (int p = 0; p < s->planes; p++) {
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int ch = s->ch_order[p];
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uint16_t *dst = (uint16_t *)(scanline->uncompressed_data + scanline_size * l + p * frame->width * 2);
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uint32_t *src = (uint32_t *)(frame->data[ch] + (y * s->scanline_height + l) * frame->linesize[ch]);
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for (int x = 0; x < frame->width; x++)
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dst[x] = float2half(src[x], s->basetable, s->shifttable);
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}
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}
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break;
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}
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reorder_pixels(scanline->tmp, scanline->uncompressed_data, tmp_size);
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predictor(scanline->tmp, tmp_size);
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source_size = tmp_size;
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actual_size = max_compressed_size;
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compress(scanline->compressed_data, &actual_size,
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scanline->tmp, source_size);
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scanline->actual_size = actual_size;
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if (scanline->actual_size >= tmp_size) {
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FFSWAP(uint8_t *, scanline->uncompressed_data, scanline->compressed_data);
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FFSWAP(int, scanline->uncompressed_size, scanline->compressed_size);
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scanline->actual_size = tmp_size;
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}
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}
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return 0;
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}
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static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
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const AVFrame *frame, int *got_packet)
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{
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EXRContext *s = avctx->priv_data;
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PutByteContext *pb = &s->pb;
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int64_t offset;
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int ret;
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int64_t out_size = 2048LL + avctx->height * 16LL +
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av_image_get_buffer_size(avctx->pix_fmt,
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avctx->width,
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avctx->height, 64) * 3LL / 2;
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if ((ret = ff_get_encode_buffer(avctx, pkt, out_size, 0)) < 0)
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return ret;
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bytestream2_init_writer(pb, pkt->data, pkt->size);
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bytestream2_put_le32(pb, 20000630);
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bytestream2_put_byte(pb, 2);
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bytestream2_put_le24(pb, 0);
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bytestream2_put_buffer(pb, "channels\0chlist\0", 16);
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bytestream2_put_le32(pb, s->planes * 18 + 1);
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for (int p = 0; p < s->planes; p++) {
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bytestream2_put_byte(pb, s->ch_names[p]);
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bytestream2_put_byte(pb, 0);
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bytestream2_put_le32(pb, s->pixel_type);
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bytestream2_put_le32(pb, 0);
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bytestream2_put_le32(pb, 1);
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bytestream2_put_le32(pb, 1);
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}
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bytestream2_put_byte(pb, 0);
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bytestream2_put_buffer(pb, "compression\0compression\0", 24);
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bytestream2_put_le32(pb, 1);
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bytestream2_put_byte(pb, s->compression);
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bytestream2_put_buffer(pb, "dataWindow\0box2i\0", 17);
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bytestream2_put_le32(pb, 16);
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bytestream2_put_le32(pb, 0);
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bytestream2_put_le32(pb, 0);
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bytestream2_put_le32(pb, avctx->width - 1);
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bytestream2_put_le32(pb, avctx->height - 1);
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bytestream2_put_buffer(pb, "displayWindow\0box2i\0", 20);
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bytestream2_put_le32(pb, 16);
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bytestream2_put_le32(pb, 0);
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bytestream2_put_le32(pb, 0);
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bytestream2_put_le32(pb, avctx->width - 1);
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bytestream2_put_le32(pb, avctx->height - 1);
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bytestream2_put_buffer(pb, "lineOrder\0lineOrder\0", 20);
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bytestream2_put_le32(pb, 1);
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bytestream2_put_byte(pb, 0);
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bytestream2_put_buffer(pb, "screenWindowCenter\0v2f\0", 23);
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bytestream2_put_le32(pb, 8);
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bytestream2_put_le64(pb, 0);
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bytestream2_put_buffer(pb, "screenWindowWidth\0float\0", 24);
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bytestream2_put_le32(pb, 4);
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bytestream2_put_le32(pb, av_float2int(1.f));
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if (avctx->sample_aspect_ratio.num && avctx->sample_aspect_ratio.den) {
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bytestream2_put_buffer(pb, "pixelAspectRatio\0float\0", 23);
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bytestream2_put_le32(pb, 4);
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bytestream2_put_le32(pb, av_float2int(av_q2d(avctx->sample_aspect_ratio)));
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}
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if (avctx->framerate.num && avctx->framerate.den) {
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bytestream2_put_buffer(pb, "framesPerSecond\0rational\0", 25);
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bytestream2_put_le32(pb, 8);
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bytestream2_put_le32(pb, avctx->framerate.num);
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bytestream2_put_le32(pb, avctx->framerate.den);
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}
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bytestream2_put_buffer(pb, "gamma\0float\0", 12);
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bytestream2_put_le32(pb, 4);
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bytestream2_put_le32(pb, av_float2int(s->gamma));
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bytestream2_put_buffer(pb, "writer\0string\0", 14);
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bytestream2_put_le32(pb, 4);
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bytestream2_put_buffer(pb, "lavc", 4);
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bytestream2_put_byte(pb, 0);
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switch (s->compression) {
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case EXR_RAW:
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/* nothing to do */
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break;
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case EXR_RLE:
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encode_scanline_rle(s, frame);
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break;
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case EXR_ZIP16:
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case EXR_ZIP1:
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encode_scanline_zip(s, frame);
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break;
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default:
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av_assert0(0);
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}
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switch (s->compression) {
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case EXR_RAW:
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offset = bytestream2_tell_p(pb) + avctx->height * 8LL;
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if (s->pixel_type == EXR_FLOAT) {
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for (int y = 0; y < avctx->height; y++) {
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bytestream2_put_le64(pb, offset);
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offset += avctx->width * s->planes * 4 + 8;
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}
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for (int y = 0; y < avctx->height; y++) {
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bytestream2_put_le32(pb, y);
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bytestream2_put_le32(pb, s->planes * avctx->width * 4);
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for (int p = 0; p < s->planes; p++) {
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int ch = s->ch_order[p];
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bytestream2_put_buffer(pb, frame->data[ch] + y * frame->linesize[ch],
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avctx->width * 4);
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}
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}
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} else {
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for (int y = 0; y < avctx->height; y++) {
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bytestream2_put_le64(pb, offset);
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offset += avctx->width * s->planes * 2 + 8;
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}
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for (int y = 0; y < avctx->height; y++) {
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bytestream2_put_le32(pb, y);
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bytestream2_put_le32(pb, s->planes * avctx->width * 2);
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for (int p = 0; p < s->planes; p++) {
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int ch = s->ch_order[p];
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uint32_t *src = (uint32_t *)(frame->data[ch] + y * frame->linesize[ch]);
|
|
|
|
for (int x = 0; x < frame->width; x++)
|
|
bytestream2_put_le16(pb, float2half(src[x], s->basetable, s->shifttable));
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case EXR_ZIP16:
|
|
case EXR_ZIP1:
|
|
case EXR_RLE:
|
|
offset = bytestream2_tell_p(pb) + s->nb_scanlines * 8LL;
|
|
|
|
for (int y = 0; y < s->nb_scanlines; y++) {
|
|
EXRScanlineData *scanline = &s->scanline[y];
|
|
|
|
bytestream2_put_le64(pb, offset);
|
|
offset += scanline->actual_size + 8;
|
|
}
|
|
|
|
for (int y = 0; y < s->nb_scanlines; y++) {
|
|
EXRScanlineData *scanline = &s->scanline[y];
|
|
|
|
bytestream2_put_le32(pb, y * s->scanline_height);
|
|
bytestream2_put_le32(pb, scanline->actual_size);
|
|
bytestream2_put_buffer(pb, scanline->compressed_data,
|
|
scanline->actual_size);
|
|
}
|
|
break;
|
|
default:
|
|
av_assert0(0);
|
|
}
|
|
|
|
av_shrink_packet(pkt, bytestream2_tell_p(pb));
|
|
|
|
*got_packet = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define OFFSET(x) offsetof(EXRContext, x)
|
|
#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
|
|
static const AVOption options[] = {
|
|
{ "compression", "set compression type", OFFSET(compression), AV_OPT_TYPE_INT, {.i64=0}, 0, EXR_NBCOMPR-1, VE, "compr" },
|
|
{ "none", "none", 0, AV_OPT_TYPE_CONST, {.i64=EXR_RAW}, 0, 0, VE, "compr" },
|
|
{ "rle" , "RLE", 0, AV_OPT_TYPE_CONST, {.i64=EXR_RLE}, 0, 0, VE, "compr" },
|
|
{ "zip1", "ZIP1", 0, AV_OPT_TYPE_CONST, {.i64=EXR_ZIP1}, 0, 0, VE, "compr" },
|
|
{ "zip16", "ZIP16", 0, AV_OPT_TYPE_CONST, {.i64=EXR_ZIP16}, 0, 0, VE, "compr" },
|
|
{ "format", "set pixel type", OFFSET(pixel_type), AV_OPT_TYPE_INT, {.i64=EXR_FLOAT}, EXR_HALF, EXR_UNKNOWN-1, VE, "pixel" },
|
|
{ "half" , NULL, 0, AV_OPT_TYPE_CONST, {.i64=EXR_HALF}, 0, 0, VE, "pixel" },
|
|
{ "float", NULL, 0, AV_OPT_TYPE_CONST, {.i64=EXR_FLOAT}, 0, 0, VE, "pixel" },
|
|
{ "gamma", "set gamma", OFFSET(gamma), AV_OPT_TYPE_FLOAT, {.dbl=1.f}, 0.001, FLT_MAX, VE },
|
|
{ NULL},
|
|
};
|
|
|
|
static const AVClass exr_class = {
|
|
.class_name = "exr",
|
|
.item_name = av_default_item_name,
|
|
.option = options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
|
|
const AVCodec ff_exr_encoder = {
|
|
.name = "exr",
|
|
.long_name = NULL_IF_CONFIG_SMALL("OpenEXR image"),
|
|
.priv_data_size = sizeof(EXRContext),
|
|
.priv_class = &exr_class,
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_EXR,
|
|
.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
|
|
.init = encode_init,
|
|
.encode2 = encode_frame,
|
|
.close = encode_close,
|
|
.pix_fmts = (const enum AVPixelFormat[]) {
|
|
AV_PIX_FMT_GBRPF32,
|
|
AV_PIX_FMT_GBRAPF32,
|
|
AV_PIX_FMT_NONE },
|
|
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
|
|
};
|