mirror of https://github.com/FFmpeg/FFmpeg.git
parent
b707abf091
commit
cdd06db56f
9 changed files with 494 additions and 1 deletions
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/*
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* NotchLC decoder |
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* Copyright (c) 2020 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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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#define BITSTREAM_READER_LE |
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#include "libavutil/intreadwrite.h" |
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#include "avcodec.h" |
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#include "bytestream.h" |
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#include "get_bits.h" |
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#include "internal.h" |
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#include "lzf.h" |
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#include "thread.h" |
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typedef struct NotchLCContext { |
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unsigned compressed_size; |
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unsigned format; |
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uint8_t *uncompressed_buffer; |
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unsigned uncompressed_size; |
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uint8_t *lzf_buffer; |
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int64_t lzf_size; |
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unsigned texture_size_x; |
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unsigned texture_size_y; |
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unsigned y_data_row_offsets; |
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unsigned uv_offset_data_offset; |
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unsigned y_control_data_offset; |
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unsigned a_control_word_offset; |
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unsigned y_data_offset; |
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unsigned uv_data_offset; |
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unsigned y_data_size; |
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unsigned uv_count_size; |
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unsigned uv_count_offset; |
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unsigned a_count_size; |
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unsigned data_end; |
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GetByteContext gb; |
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PutByteContext pb; |
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} NotchLCContext; |
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static av_cold int decode_init(AVCodecContext *avctx) |
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{ |
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avctx->pix_fmt = AV_PIX_FMT_YUV444P12; |
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avctx->color_range = AVCOL_RANGE_JPEG; |
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avctx->colorspace = AVCOL_SPC_RGB; |
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avctx->color_primaries = AVCOL_PRI_BT709; |
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avctx->color_trc = AVCOL_TRC_IEC61966_2_1; |
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return 0; |
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} |
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#define HISTORY_SIZE (64 * 1024) |
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static int lz4_decompress(AVCodecContext *avctx, |
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GetByteContext *gb, |
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PutByteContext *pb) |
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{ |
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unsigned reference_pos, match_length, delta, pos = 0; |
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uint8_t history[64 * 1024]; |
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while (bytestream2_get_bytes_left(gb) > 0) { |
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uint8_t token = bytestream2_get_byte(gb); |
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unsigned num_literals = token >> 4; |
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if (num_literals == 15) { |
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unsigned char current; |
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do { |
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current = bytestream2_get_byte(gb); |
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num_literals += current; |
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} while (current == 255); |
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} |
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if (pos + num_literals < HISTORY_SIZE) { |
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bytestream2_get_buffer(gb, history + pos, num_literals); |
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pos += num_literals; |
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} else { |
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while (num_literals-- > 0) { |
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history[pos++] = bytestream2_get_byte(gb); |
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if (pos == HISTORY_SIZE) { |
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bytestream2_put_buffer(pb, history, HISTORY_SIZE); |
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pos = 0; |
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} |
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} |
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} |
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if (bytestream2_get_bytes_left(gb) <= 0) |
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break; |
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delta = bytestream2_get_byte(gb); |
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delta |= (unsigned)bytestream2_get_byte(gb) << 8; |
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if (delta == 0) |
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return 0; |
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match_length = 4 + (token & 0x0F); |
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if (match_length == 4 + 0x0F) { |
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uint8_t current; |
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do { |
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current = bytestream2_get_byte(gb); |
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match_length += current; |
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} while (current == 255); |
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} |
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reference_pos = (pos >= delta) ? (pos - delta) : (HISTORY_SIZE + pos - delta); |
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if (pos + match_length < HISTORY_SIZE && reference_pos + match_length < HISTORY_SIZE) { |
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if (pos >= reference_pos + match_length || reference_pos >= pos + match_length) { |
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memcpy(history + pos, history + reference_pos, match_length); |
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pos += match_length; |
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} else { |
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while (match_length-- > 0) |
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history[pos++] = history[reference_pos++]; |
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} |
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} else { |
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while (match_length-- > 0) { |
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history[pos++] = history[reference_pos++]; |
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if (pos == HISTORY_SIZE) { |
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bytestream2_put_buffer(pb, history, HISTORY_SIZE); |
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pos = 0; |
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} |
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reference_pos %= HISTORY_SIZE; |
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} |
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} |
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} |
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bytestream2_put_buffer(pb, history, pos); |
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return bytestream2_tell_p(pb); |
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} |
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static int decode_blocks(AVCodecContext *avctx, AVFrame *p, ThreadFrame *frame, |
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unsigned uncompressed_size) |
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{ |
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NotchLCContext *s = avctx->priv_data; |
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GetByteContext rgb, dgb, *gb = &s->gb; |
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GetBitContext bit; |
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int ylinesize, ulinesize, vlinesize, alinesize; |
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uint16_t *dsty, *dstu, *dstv, *dsta; |
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int ret; |
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s->texture_size_x = bytestream2_get_le32(gb); |
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s->texture_size_y = bytestream2_get_le32(gb); |
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ret = ff_set_dimensions(avctx, s->texture_size_x, s->texture_size_y); |
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if (ret < 0) |
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return ret; |
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s->uv_offset_data_offset = bytestream2_get_le32(gb); |
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if (s->uv_offset_data_offset >= UINT_MAX / 4) |
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return AVERROR_INVALIDDATA; |
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s->uv_offset_data_offset *= 4; |
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if (s->uv_offset_data_offset >= uncompressed_size) |
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return AVERROR_INVALIDDATA; |
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s->y_control_data_offset = bytestream2_get_le32(gb); |
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if (s->y_control_data_offset >= UINT_MAX / 4) |
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return AVERROR_INVALIDDATA; |
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s->y_control_data_offset *= 4; |
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if (s->y_control_data_offset >= uncompressed_size) |
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return AVERROR_INVALIDDATA; |
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s->a_control_word_offset = bytestream2_get_le32(gb); |
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if (s->a_control_word_offset >= UINT_MAX / 4) |
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return AVERROR_INVALIDDATA; |
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s->a_control_word_offset *= 4; |
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if (s->a_control_word_offset >= uncompressed_size) |
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return AVERROR_INVALIDDATA; |
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s->uv_data_offset = bytestream2_get_le32(gb); |
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if (s->uv_data_offset >= UINT_MAX / 4) |
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return AVERROR_INVALIDDATA; |
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s->uv_data_offset *= 4; |
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if (s->uv_data_offset >= uncompressed_size) |
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return AVERROR_INVALIDDATA; |
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s->y_data_size = bytestream2_get_le32(gb); |
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if (s->y_data_size >= UINT_MAX / 4) |
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return AVERROR_INVALIDDATA; |
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s->uv_count_size = bytestream2_get_le32(gb); |
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if (s->uv_count_size >= UINT_MAX / 4) |
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return AVERROR_INVALIDDATA; |
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s->uv_count_size *= 4; |
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if (s->uv_count_size >= uncompressed_size) |
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return AVERROR_INVALIDDATA; |
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s->a_count_size = bytestream2_get_le32(gb); |
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if (s->a_count_size >= UINT_MAX / 4) |
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return AVERROR_INVALIDDATA; |
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s->a_count_size *= 4; |
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if (s->a_count_size >= uncompressed_size) |
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return AVERROR_INVALIDDATA; |
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s->data_end = bytestream2_get_le32(gb); |
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if (s->data_end > uncompressed_size) |
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return AVERROR_INVALIDDATA; |
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s->y_data_row_offsets = bytestream2_tell(gb); |
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if (s->data_end <= s->y_data_size) |
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return AVERROR_INVALIDDATA; |
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s->y_data_offset = s->data_end - s->y_data_size; |
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if (s->y_data_offset <= s->uv_count_size) |
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return AVERROR_INVALIDDATA; |
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s->uv_count_offset = s->y_data_offset - s->uv_count_size; |
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if ((ret = ff_thread_get_buffer(avctx, frame, 0)) < 0) |
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return ret; |
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rgb = *gb; |
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dgb = *gb; |
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bytestream2_seek(&rgb, s->y_data_row_offsets, SEEK_SET); |
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bytestream2_seek(gb, s->y_control_data_offset, SEEK_SET); |
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dsty = (uint16_t *)p->data[0]; |
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dsta = (uint16_t *)p->data[3]; |
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ylinesize = p->linesize[0] / 2; |
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alinesize = p->linesize[3] / 2; |
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for (int y = 0; y < avctx->height; y += 4) { |
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const unsigned row_offset = bytestream2_get_le32(&rgb); |
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bytestream2_seek(&dgb, s->y_data_offset + row_offset, SEEK_SET); |
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init_get_bits8(&bit, dgb.buffer, bytestream2_get_bytes_left(&dgb)); |
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for (int x = 0; x < avctx->width; x += 4) { |
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unsigned item = bytestream2_get_le32(gb); |
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unsigned y_min = item & 4095; |
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unsigned y_max = (item >> 12) & 4095; |
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unsigned y_diff = y_max - y_min; |
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unsigned control[4]; |
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control[0] = (item >> 24) & 3; |
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control[1] = (item >> 26) & 3; |
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control[2] = (item >> 28) & 3; |
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control[3] = (item >> 30) & 3; |
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for (int i = 0; i < 4; i++) { |
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const int nb_bits = control[i] + 1; |
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const int div = (1 << nb_bits) - 1; |
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const int add = div - 1; |
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dsty[x + i * ylinesize + 0] = av_clip_uintp2(y_min + ((y_diff * get_bits(&bit, nb_bits) + add) / div), 12); |
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dsty[x + i * ylinesize + 1] = av_clip_uintp2(y_min + ((y_diff * get_bits(&bit, nb_bits) + add) / div), 12); |
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dsty[x + i * ylinesize + 2] = av_clip_uintp2(y_min + ((y_diff * get_bits(&bit, nb_bits) + add) / div), 12); |
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dsty[x + i * ylinesize + 3] = av_clip_uintp2(y_min + ((y_diff * get_bits(&bit, nb_bits) + add) / div), 12); |
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} |
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} |
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dsty += 4 * ylinesize; |
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dsta += 4 * alinesize; |
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} |
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rgb = *gb; |
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dgb = *gb; |
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bytestream2_seek(&rgb, s->uv_offset_data_offset, SEEK_SET); |
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bytestream2_seek(gb, s->a_control_word_offset, SEEK_SET); |
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dstu = (uint16_t *)p->data[1]; |
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dstv = (uint16_t *)p->data[2]; |
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ulinesize = p->linesize[1] / 2; |
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vlinesize = p->linesize[2] / 2; |
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for (int y = 0; y < avctx->height; y += 16) { |
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for (int x = 0; x < avctx->width; x += 16) { |
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unsigned offset = bytestream2_get_le32(&rgb) * 4; |
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int u[16][16] = { 0 }, v[16][16] = { 0 }; |
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int u0, v0, u1, v1, udif, vdif; |
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unsigned escape, is8x8, loc; |
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bytestream2_seek(&dgb, s->uv_data_offset + offset, SEEK_SET); |
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is8x8 = bytestream2_get_le16(&dgb); |
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escape = bytestream2_get_le16(&dgb); |
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if (escape == 0 && is8x8 == 0) { |
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u0 = bytestream2_get_byte(&dgb); |
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v0 = bytestream2_get_byte(&dgb); |
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u1 = bytestream2_get_byte(&dgb); |
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v1 = bytestream2_get_byte(&dgb); |
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loc = bytestream2_get_le32(&dgb); |
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u0 = (u0 << 4) | (u0 & 0xF); |
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v0 = (v0 << 4) | (v0 & 0xF); |
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u1 = (u1 << 4) | (u1 & 0xF); |
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v1 = (v1 << 4) | (v1 & 0xF); |
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udif = u1 - u0; |
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vdif = v1 - v0; |
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for (int i = 0; i < 16; i += 4) { |
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for (int j = 0; j < 16; j += 4) { |
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for (int ii = 0; ii < 4; ii++) { |
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for (int jj = 0; jj < 4; jj++) { |
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u[i + ii][j + jj] = u0 + ((udif * (int)(loc & 3) + 2) / 3); |
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v[i + ii][j + jj] = v0 + ((vdif * (int)(loc & 3) + 2) / 3); |
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} |
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} |
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loc >>= 2; |
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} |
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} |
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} else { |
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for (int i = 0; i < 16; i += 8) { |
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for (int j = 0; j < 16; j += 8) { |
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if (is8x8 & 1) { |
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u0 = bytestream2_get_byte(&dgb); |
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v0 = bytestream2_get_byte(&dgb); |
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u1 = bytestream2_get_byte(&dgb); |
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v1 = bytestream2_get_byte(&dgb); |
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loc = bytestream2_get_le32(&dgb); |
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u0 = (u0 << 4) | (u0 & 0xF); |
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v0 = (v0 << 4) | (v0 & 0xF); |
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u1 = (u1 << 4) | (u1 & 0xF); |
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v1 = (v1 << 4) | (v1 & 0xF); |
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udif = u1 - u0; |
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vdif = v1 - v0; |
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for (int ii = 0; ii < 8; ii += 2) { |
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for (int jj = 0; jj < 8; jj += 2) { |
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for (int iii = 0; iii < 2; iii++) { |
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for (int jjj = 0; jjj < 2; jjj++) { |
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u[i + ii + iii][j + jj + jjj] = u0 + ((udif * (int)(loc & 3) + 2) / 3); |
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v[i + ii + iii][j + jj + jjj] = v0 + ((vdif * (int)(loc & 3) + 2) / 3); |
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} |
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} |
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loc >>= 2; |
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} |
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} |
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} else if (escape) { |
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for (int ii = 0; ii < 8; ii += 4) { |
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for (int jj = 0; jj < 8; jj += 4) { |
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u0 = bytestream2_get_byte(&dgb); |
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v0 = bytestream2_get_byte(&dgb); |
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u1 = bytestream2_get_byte(&dgb); |
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v1 = bytestream2_get_byte(&dgb); |
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loc = bytestream2_get_le32(&dgb); |
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u0 = (u0 << 4) | (u0 & 0xF); |
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v0 = (v0 << 4) | (v0 & 0xF); |
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u1 = (u1 << 4) | (u1 & 0xF); |
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v1 = (v1 << 4) | (v1 & 0xF); |
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udif = u1 - u0; |
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vdif = v1 - v0; |
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for (int iii = 0; iii < 4; iii++) { |
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for (int jjj = 0; jjj < 4; jjj++) { |
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u[i + ii + iii][j + jj + jjj] = u0 + ((udif * (int)(loc & 3) + 2) / 3); |
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v[i + ii + iii][j + jj + jjj] = v0 + ((vdif * (int)(loc & 3) + 2) / 3); |
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loc >>= 2; |
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} |
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} |
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} |
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} |
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} |
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is8x8 >>= 1; |
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} |
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} |
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} |
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for (int i = 0; i < 16; i++) { |
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for (int j = 0; j < 16; j++) { |
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dstu[x + i * ulinesize + j] = u[i][j]; |
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dstv[x + i * vlinesize + j] = v[i][j]; |
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} |
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} |
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} |
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dstu += 16 * ulinesize; |
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dstv += 16 * vlinesize; |
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} |
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return 0; |
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} |
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static int decode_frame(AVCodecContext *avctx, |
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void *data, int *got_frame, |
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AVPacket *avpkt) |
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{ |
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NotchLCContext *s = avctx->priv_data; |
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ThreadFrame frame = { .f = data }; |
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GetByteContext *gb = &s->gb; |
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PutByteContext *pb = &s->pb; |
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unsigned uncompressed_size; |
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AVFrame *p = data; |
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int ret; |
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if (avpkt->size <= 40) |
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return AVERROR_INVALIDDATA; |
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bytestream2_init(gb, avpkt->data, avpkt->size); |
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if (bytestream2_get_le32(gb) != MKBETAG('N','L','C','1')) |
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return AVERROR_INVALIDDATA; |
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uncompressed_size = bytestream2_get_le32(gb); |
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s->compressed_size = bytestream2_get_le32(gb); |
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s->format = bytestream2_get_le32(gb); |
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if (s->format > 2) |
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return AVERROR_PATCHWELCOME; |
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if (s->format == 0) { |
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ret = ff_lzf_uncompress(gb, &s->lzf_buffer, &s->lzf_size); |
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if (ret < 0) |
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return ret; |
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if (uncompressed_size > s->lzf_size) |
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return AVERROR_INVALIDDATA; |
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bytestream2_init(gb, s->lzf_buffer, uncompressed_size); |
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} else if (s->format == 1) { |
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av_fast_padded_malloc(&s->uncompressed_buffer, &s->uncompressed_size, |
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uncompressed_size); |
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if (!s->uncompressed_buffer) |
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return AVERROR(ENOMEM); |
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bytestream2_init_writer(pb, s->uncompressed_buffer, s->uncompressed_size); |
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ret = lz4_decompress(avctx, gb, pb); |
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if (ret != uncompressed_size) |
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return AVERROR_INVALIDDATA; |
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bytestream2_init(gb, s->uncompressed_buffer, uncompressed_size); |
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} |
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ret = decode_blocks(avctx, p, &frame, uncompressed_size); |
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if (ret < 0) |
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return ret; |
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p->pict_type = AV_PICTURE_TYPE_I; |
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p->key_frame = 1; |
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*got_frame = 1; |
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return avpkt->size; |
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} |
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static av_cold int decode_end(AVCodecContext *avctx) |
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{ |
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NotchLCContext *s = avctx->priv_data; |
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av_freep(&s->uncompressed_buffer); |
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s->uncompressed_size = 0; |
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av_freep(&s->lzf_buffer); |
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s->lzf_size = 0; |
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return 0; |
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} |
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AVCodec ff_notchlc_decoder = { |
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.name = "notchlc", |
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.long_name = NULL_IF_CONFIG_SMALL("NotchLC"), |
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.type = AVMEDIA_TYPE_VIDEO, |
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.id = AV_CODEC_ID_NOTCHLC, |
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.priv_data_size = sizeof(NotchLCContext), |
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.init = decode_init, |
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.close = decode_end, |
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.decode = decode_frame, |
||||
.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS, |
||||
}; |
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Reference in new issue