mirror of https://github.com/FFmpeg/FFmpeg.git
Paul B Mahol
2 years ago
parent
4136405c86
commit
307ab7fe8a
17 changed files with 521 additions and 3 deletions
@ -0,0 +1,79 @@ |
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/*
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* Radiance HDR parser |
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* Copyright (c) 2022 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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* Radiance HDR parser |
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*/ |
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#include "libavutil/intreadwrite.h" |
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#include "parser.h" |
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typedef struct HDRParseContext { |
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ParseContext pc; |
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} HDRParseContext; |
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static int hdr_parse(AVCodecParserContext *s, AVCodecContext *avctx, |
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const uint8_t **poutbuf, int *poutbuf_size, |
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const uint8_t *buf, int buf_size) |
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{ |
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HDRParseContext *ipc = s->priv_data; |
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uint64_t state = ipc->pc.state64; |
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int next = END_NOT_FOUND, i = 0; |
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*poutbuf_size = 0; |
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*poutbuf = NULL; |
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if (s->flags & PARSER_FLAG_COMPLETE_FRAMES) { |
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next = buf_size; |
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} else { |
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for (; i < buf_size; i++) { |
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state = (state << 8) | buf[i]; |
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if (state == AV_RB64("ADIANCE\n") && (i > 10 || ipc->pc.index > 10)) { |
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next = i - 10; |
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break; |
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} |
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} |
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ipc->pc.state64 = state; |
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if (ff_combine_frame(&ipc->pc, next, &buf, &buf_size) < 0) { |
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*poutbuf = NULL; |
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*poutbuf_size = 0; |
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return buf_size; |
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} |
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} |
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*poutbuf = buf; |
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*poutbuf_size = buf_size; |
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s->pict_type = AV_PICTURE_TYPE_I; |
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s->key_frame = 1; |
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s->duration = 1; |
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return next; |
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} |
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const AVCodecParser ff_hdr_parser = { |
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.codec_ids = { AV_CODEC_ID_RADIANCE_HDR }, |
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.priv_data_size = sizeof(HDRParseContext), |
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.parser_parse = hdr_parse, |
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.parser_close = ff_parse_close, |
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}; |
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@ -0,0 +1,222 @@ |
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/*
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* Radiance HDR image format |
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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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#include <stdlib.h> |
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#include "libavutil/imgutils.h" |
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#include "avcodec.h" |
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#include "internal.h" |
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#include "bytestream.h" |
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#include "codec_internal.h" |
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#include "thread.h" |
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#define MINELEN 8 |
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#define MAXELEN 0x7fff |
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static int hdr_get_line(GetByteContext *gb, uint8_t *buffer, int size) |
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{ |
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int n = 0, c; |
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memset(buffer, 0, size); |
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do { |
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c = bytestream2_get_byte(gb); |
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if (n < size - 1) |
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buffer[n++] = c; |
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} while (bytestream2_get_bytes_left(gb) > 0 && c != '\n'); |
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return 0; |
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} |
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static float convert(int expo, int val) |
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{ |
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if (expo == -128) { |
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return 0.f; |
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} else { |
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const float v = val / 256.f; |
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return ldexpf(v, expo); |
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} |
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} |
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static int decompress(uint8_t *scanline, int w, GetByteContext *gb, const uint8_t *start) |
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{ |
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int rshift = 0; |
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while (w > 0) { |
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scanline[0] = bytestream2_get_byte(gb); |
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scanline[1] = bytestream2_get_byte(gb); |
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scanline[2] = bytestream2_get_byte(gb); |
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scanline[3] = bytestream2_get_byte(gb); |
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if (scanline[0] == 1 && |
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scanline[1] == 1 && |
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scanline[2] == 1) { |
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int run = scanline[3]; |
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for (int i = run << rshift; i > 0 && w > 0 && scanline >= start + 4; i--) { |
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memcpy(scanline, scanline - 4, 4); |
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scanline += 4; |
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} |
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w -= run << rshift; |
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rshift += 8; |
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if (rshift > 16) |
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break; |
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} else { |
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scanline += 4; |
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w--; |
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rshift = 0; |
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} |
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} |
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return 1; |
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} |
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static int hdr_decode_frame(AVCodecContext *avctx, AVFrame *p, |
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int *got_frame, AVPacket *avpkt) |
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{ |
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const uint8_t *buf = avpkt->data; |
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int ret, buf_size = avpkt->size; |
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int width = 0, height = 0; |
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GetByteContext gb; |
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uint8_t line[512]; |
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float sar; |
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bytestream2_init(&gb, buf, buf_size); |
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hdr_get_line(&gb, line, sizeof(line)); |
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if (memcmp("#?RADIANCE\n", line, 11)) |
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return AVERROR_INVALIDDATA; |
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do { |
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hdr_get_line(&gb, line, sizeof(line)); |
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if (sscanf(line, "PIXASPECT=%f\n", &sar) == 1) |
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avctx->sample_aspect_ratio = p->sample_aspect_ratio = av_inv_q(av_d2q(sar, 4096)); |
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} while (line[0] != '\n'); |
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hdr_get_line(&gb, line, sizeof(line)); |
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if (sscanf(line, "-Y %d +X %d\n", &height, &width) == 2) { |
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; |
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} else if (sscanf(line, "+Y %d +X %d\n", &height, &width) == 2) { |
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; |
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} else if (sscanf(line, "-Y %d -X %d\n", &height, &width) == 2) { |
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; |
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} else if (sscanf(line, "+Y %d -X %d\n", &height, &width) == 2) { |
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; |
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} else if (sscanf(line, "-X %d +Y %d\n", &width, &height) == 2) { |
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; |
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} else if (sscanf(line, "+X %d +Y %d\n", &width, &height) == 2) { |
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; |
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} else if (sscanf(line, "-X %d -Y %d\n", &width, &height) == 2) { |
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; |
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} else if (sscanf(line, "+X %d -Y %d\n", &width, &height) == 2) { |
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; |
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} |
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if ((ret = ff_set_dimensions(avctx, width, height)) < 0) |
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return ret; |
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avctx->pix_fmt = AV_PIX_FMT_GBRPF32; |
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if ((ret = ff_thread_get_buffer(avctx, p, 0)) < 0) |
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return ret; |
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for (int y = 0; y < height; y++) { |
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float *dst_r = (float *)(p->data[2] + y * p->linesize[2]); |
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float *dst_g = (float *)(p->data[0] + y * p->linesize[0]); |
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float *dst_b = (float *)(p->data[1] + y * p->linesize[1]); |
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uint8_t *scanline = p->data[0] + y * p->linesize[0]; |
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int i; |
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if (width < MINELEN || width > MAXELEN) { |
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decompress(scanline, width, &gb, scanline); |
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goto convert; |
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} |
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i = bytestream2_peek_byte(&gb); |
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if (i != 2) { |
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decompress(scanline, width, &gb, scanline); |
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goto convert; |
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} |
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bytestream2_skip(&gb, 1); |
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scanline[1] = bytestream2_get_byte(&gb); |
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scanline[2] = bytestream2_get_byte(&gb); |
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i = bytestream2_get_byte(&gb); |
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if (scanline[1] != 2 || scanline[2] & 128) { |
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scanline[0] = 2; |
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scanline[3] = i; |
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decompress(scanline + 4, width - 1, &gb, scanline); |
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goto convert; |
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} |
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for (int i = 0; i < 4; i++) { |
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uint8_t *scanline = p->data[0] + y * p->linesize[0] + i; |
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for (int j = 0; j < width * 4 && bytestream2_get_bytes_left(&gb) > 0;) { |
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int run = bytestream2_get_byte(&gb); |
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if (run > 128) { |
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uint8_t val = bytestream2_get_byte(&gb); |
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run &= 127; |
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while (run--) { |
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if (j >= width * 4) |
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break; |
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scanline[j] = val; |
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j += 4; |
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} |
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} else if (run > 0) { |
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while (run--) { |
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if (j >= width * 4) |
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break; |
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scanline[j] = bytestream2_get_byte(&gb); |
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j += 4; |
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} |
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} |
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} |
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} |
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convert: |
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for (int x = 0; x < width; x++) { |
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uint8_t rgbe[4]; |
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int expo; |
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memcpy(rgbe, p->data[0] + y * p->linesize[0] + x * 4, 4); |
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expo = rgbe[3] - 128; |
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dst_r[x] = convert(expo, rgbe[0]); |
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dst_b[x] = convert(expo, rgbe[2]); |
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dst_g[x] = convert(expo, rgbe[1]); |
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} |
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} |
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p->key_frame = 1; |
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p->pict_type = AV_PICTURE_TYPE_I; |
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*got_frame = 1; |
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return buf_size; |
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} |
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const FFCodec ff_hdr_decoder = { |
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.p.name = "hdr", |
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.p.long_name = NULL_IF_CONFIG_SMALL("HDR (Radiance RGBE format) image"), |
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.p.type = AVMEDIA_TYPE_VIDEO, |
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.p.id = AV_CODEC_ID_RADIANCE_HDR, |
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.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS, |
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FF_CODEC_DECODE_CB(hdr_decode_frame), |
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}; |
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@ -0,0 +1,189 @@ |
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/*
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* Radiance HDR image format |
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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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#include "libavutil/imgutils.h" |
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#include "avcodec.h" |
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#include "bytestream.h" |
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#include "codec_internal.h" |
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#include "encode.h" |
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typedef struct HDREncContext { |
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uint8_t *scanline; |
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} HDREncContext; |
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static av_cold int hdr_encode_init(AVCodecContext *avctx) |
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{ |
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HDREncContext *s = avctx->priv_data; |
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s->scanline = av_calloc(avctx->width * 4, 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 av_cold int hdr_encode_close(AVCodecContext *avctx) |
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{ |
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HDREncContext *s = avctx->priv_data; |
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av_freep(&s->scanline); |
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return 0; |
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} |
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static void bytestream_put_str(uint8_t **buf, const char *const line) |
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{ |
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bytestream_put_buffer(buf, line, strlen(line)); |
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} |
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static void float2rgbe(uint8_t *rgbe, float red, float green, float blue) |
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{ |
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float v; |
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int e; |
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v = FFMAX3(red, green, blue); |
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if (v < 1e-32f) { |
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rgbe[0] = rgbe[1] = rgbe[2] = rgbe[3] = 0; |
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} else { |
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v = frexpf(v, &e) * 256.f / v; |
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rgbe[0] = av_clip_uint8(red * v); |
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rgbe[1] = av_clip_uint8(green * v); |
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rgbe[2] = av_clip_uint8(blue * v); |
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rgbe[3] = av_clip_uint8(e + 128); |
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} |
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} |
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static void rle(uint8_t **buffer, const uint8_t *data, int width) |
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{ |
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#define MIN_RLE 4 |
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int cur = 0; |
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while (cur < width) { |
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int run_count = 0, old_run_count = 0; |
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int beg_run = cur; |
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uint8_t buf[2]; |
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while (run_count < MIN_RLE && beg_run < width) { |
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beg_run += run_count; |
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old_run_count = run_count; |
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run_count = 1; |
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while ((beg_run + run_count < width) && (run_count < 127) && |
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(data[beg_run * 4] == data[(beg_run + run_count) * 4])) |
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run_count++; |
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} |
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if ((old_run_count > 1) && (old_run_count == beg_run - cur)) { |
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buf[0] = 128 + old_run_count; |
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buf[1] = data[cur * 4]; |
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bytestream_put_buffer(buffer, buf, sizeof(buf)); |
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cur = beg_run; |
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} |
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while (cur < beg_run) { |
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int nonrun_count = FFMIN(128, beg_run - cur); |
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buf[0] = nonrun_count; |
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bytestream_put_byte(buffer, buf[0]); |
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for (int n = 0; n < nonrun_count; n++) |
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bytestream_put_byte(buffer, data[(cur + n) * 4]); |
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cur += nonrun_count; |
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} |
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if (run_count >= MIN_RLE) { |
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buf[0] = 128 + run_count; |
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buf[1] = data[beg_run * 4]; |
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bytestream_put_buffer(buffer, buf, sizeof(buf)); |
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cur += run_count; |
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} |
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} |
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} |
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static int hdr_encode_frame(AVCodecContext *avctx, AVPacket *pkt, |
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const AVFrame *frame, int *got_packet) |
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{ |
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HDREncContext *s = avctx->priv_data; |
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int64_t packet_size; |
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uint8_t *buf; |
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int ret; |
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packet_size = avctx->width * avctx->height * 4LL + 1024LL; |
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if ((ret = ff_get_encode_buffer(avctx, pkt, packet_size, 0)) < 0) |
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return ret; |
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buf = pkt->data; |
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bytestream_put_str(&buf, "#?RADIANCE\n"); |
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bytestream_put_str(&buf, "SOFTWARE=lavc\n"); |
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ret = snprintf(buf, 32, "PIXASPECT=%f\n", av_q2d(av_inv_q(avctx->sample_aspect_ratio))); |
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if (ret > 0) |
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buf += ret; |
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bytestream_put_str(&buf, "FORMAT=32-bit_rle_rgbe\n\n"); |
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ret = snprintf(buf, 32, "-Y %d +X %d\n", avctx->height, avctx->width); |
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if (ret > 0) |
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buf += ret; |
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for (int y = 0; y < avctx->height; y++) { |
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const float *red = (const float *)(frame->data[2] + y * frame->linesize[2]); |
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const float *green = (const float *)(frame->data[0] + y * frame->linesize[0]); |
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const float *blue = (const float *)(frame->data[1] + y * frame->linesize[1]); |
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if (avctx->width < 8 || avctx->width > 0x7fff) { |
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for (int x = 0; x < avctx->width; x++) { |
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float2rgbe(buf, red[x], green[x], blue[x]); |
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buf += 4; |
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} |
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} else { |
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bytestream_put_byte(&buf, 2); |
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bytestream_put_byte(&buf, 2); |
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bytestream_put_byte(&buf, avctx->width >> 8); |
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bytestream_put_byte(&buf, avctx->width & 0xFF); |
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for (int x = 0; x < avctx->width; x++) |
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float2rgbe(s->scanline + 4 * x, red[x], green[x], blue[x]); |
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for (int p = 0; p < 4; p++) |
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rle(&buf, s->scanline + p, avctx->width); |
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} |
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} |
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pkt->flags |= AV_PKT_FLAG_KEY; |
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av_shrink_packet(pkt, buf - pkt->data); |
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*got_packet = 1; |
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return 0; |
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} |
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const FFCodec ff_hdr_encoder = { |
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.p.name = "hdr", |
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.p.long_name = NULL_IF_CONFIG_SMALL("HDR (Radiance RGBE format) image"), |
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.priv_data_size = sizeof(HDREncContext), |
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.p.type = AVMEDIA_TYPE_VIDEO, |
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.p.id = AV_CODEC_ID_RADIANCE_HDR, |
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.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS, |
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.init = hdr_encode_init, |
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FF_CODEC_ENCODE_CB(hdr_encode_frame), |
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.close = hdr_encode_close, |
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.p.pix_fmts = (const enum AVPixelFormat[]){ |
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AV_PIX_FMT_GBRPF32, |
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AV_PIX_FMT_NONE |
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}, |
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.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP, |
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}; |
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