501 lines
17 KiB
C
501 lines
17 KiB
C
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/*
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* Vidvox Hap decoder
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* Copyright (C) 2015 Vittorio Giovara <vittorio.giovara@gmail.com>
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* Copyright (C) 2015 Tom Butterworth <bangnoise@gmail.com>
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*
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* HapQA and HAPAlphaOnly added by Jokyo Images
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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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* Hap decoder
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*
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* Fourcc: Hap1, Hap5, HapY, HapA, HapM
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*
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* https://github.com/Vidvox/hap/blob/master/documentation/HapVideoDRAFT.md
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*/
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#include <stdint.h>
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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 "hap.h"
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#include "internal.h"
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#include "snappy.h"
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#include "texturedsp.h"
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#include "thread.h"
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static int hap_parse_decode_instructions(HapContext *ctx, int size)
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{
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GetByteContext *gbc = &ctx->gbc;
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int section_size;
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enum HapSectionType section_type;
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int is_first_table = 1, had_offsets = 0, had_compressors = 0, had_sizes = 0;
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int i, ret;
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while (size > 0) {
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int stream_remaining = bytestream2_get_bytes_left(gbc);
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ret = ff_hap_parse_section_header(gbc, §ion_size, §ion_type);
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if (ret != 0)
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return ret;
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size -= stream_remaining - bytestream2_get_bytes_left(gbc);
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switch (section_type) {
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case HAP_ST_COMPRESSOR_TABLE:
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ret = ff_hap_set_chunk_count(ctx, section_size, is_first_table);
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if (ret != 0)
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return ret;
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for (i = 0; i < section_size; i++) {
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ctx->chunks[i].compressor = bytestream2_get_byte(gbc) << 4;
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}
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had_compressors = 1;
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is_first_table = 0;
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break;
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case HAP_ST_SIZE_TABLE:
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ret = ff_hap_set_chunk_count(ctx, section_size / 4, is_first_table);
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if (ret != 0)
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return ret;
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for (i = 0; i < section_size / 4; i++) {
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ctx->chunks[i].compressed_size = bytestream2_get_le32(gbc);
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}
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had_sizes = 1;
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is_first_table = 0;
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break;
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case HAP_ST_OFFSET_TABLE:
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ret = ff_hap_set_chunk_count(ctx, section_size / 4, is_first_table);
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if (ret != 0)
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return ret;
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for (i = 0; i < section_size / 4; i++) {
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ctx->chunks[i].compressed_offset = bytestream2_get_le32(gbc);
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}
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had_offsets = 1;
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is_first_table = 0;
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break;
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default:
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break;
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}
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size -= section_size;
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}
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if (!had_sizes || !had_compressors)
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return AVERROR_INVALIDDATA;
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/* The offsets table is optional. If not present than calculate offsets by
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* summing the sizes of preceding chunks. */
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if (!had_offsets) {
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size_t running_size = 0;
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for (i = 0; i < ctx->chunk_count; i++) {
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ctx->chunks[i].compressed_offset = running_size;
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running_size += ctx->chunks[i].compressed_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 hap_can_use_tex_in_place(HapContext *ctx)
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{
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int i;
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size_t running_offset = 0;
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for (i = 0; i < ctx->chunk_count; i++) {
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if (ctx->chunks[i].compressed_offset != running_offset
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|| ctx->chunks[i].compressor != HAP_COMP_NONE)
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return 0;
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running_offset += ctx->chunks[i].compressed_size;
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}
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return 1;
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}
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static int hap_parse_frame_header(AVCodecContext *avctx)
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{
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HapContext *ctx = avctx->priv_data;
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GetByteContext *gbc = &ctx->gbc;
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int section_size;
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enum HapSectionType section_type;
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const char *compressorstr;
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int i, ret;
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ret = ff_hap_parse_section_header(gbc, &ctx->texture_section_size, §ion_type);
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if (ret != 0)
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return ret;
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if ((avctx->codec_tag == MKTAG('H','a','p','1') && (section_type & 0x0F) != HAP_FMT_RGBDXT1) ||
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(avctx->codec_tag == MKTAG('H','a','p','5') && (section_type & 0x0F) != HAP_FMT_RGBADXT5) ||
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(avctx->codec_tag == MKTAG('H','a','p','Y') && (section_type & 0x0F) != HAP_FMT_YCOCGDXT5) ||
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(avctx->codec_tag == MKTAG('H','a','p','A') && (section_type & 0x0F) != HAP_FMT_RGTC1) ||
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((avctx->codec_tag == MKTAG('H','a','p','M') && (section_type & 0x0F) != HAP_FMT_RGTC1) &&
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(section_type & 0x0F) != HAP_FMT_YCOCGDXT5)) {
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av_log(avctx, AV_LOG_ERROR,
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"Invalid texture format %#04x.\n", section_type & 0x0F);
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return AVERROR_INVALIDDATA;
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}
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switch (section_type & 0xF0) {
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case HAP_COMP_NONE:
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case HAP_COMP_SNAPPY:
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ret = ff_hap_set_chunk_count(ctx, 1, 1);
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if (ret == 0) {
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ctx->chunks[0].compressor = section_type & 0xF0;
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ctx->chunks[0].compressed_offset = 0;
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ctx->chunks[0].compressed_size = ctx->texture_section_size;
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}
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if (ctx->chunks[0].compressor == HAP_COMP_NONE) {
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compressorstr = "none";
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} else {
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compressorstr = "snappy";
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}
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break;
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case HAP_COMP_COMPLEX:
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ret = ff_hap_parse_section_header(gbc, §ion_size, §ion_type);
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if (ret == 0 && section_type != HAP_ST_DECODE_INSTRUCTIONS)
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ret = AVERROR_INVALIDDATA;
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if (ret == 0)
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ret = hap_parse_decode_instructions(ctx, section_size);
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compressorstr = "complex";
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break;
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default:
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ret = AVERROR_INVALIDDATA;
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break;
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}
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if (ret != 0)
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return ret;
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/* Check the frame is valid and read the uncompressed chunk sizes */
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ctx->tex_size = 0;
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for (i = 0; i < ctx->chunk_count; i++) {
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HapChunk *chunk = &ctx->chunks[i];
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/* Check the compressed buffer is valid */
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if (chunk->compressed_offset + chunk->compressed_size > bytestream2_get_bytes_left(gbc))
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return AVERROR_INVALIDDATA;
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/* Chunks are unpacked sequentially, ctx->tex_size is the uncompressed
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* size thus far */
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chunk->uncompressed_offset = ctx->tex_size;
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/* Fill out uncompressed size */
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if (chunk->compressor == HAP_COMP_SNAPPY) {
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GetByteContext gbc_tmp;
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int64_t uncompressed_size;
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bytestream2_init(&gbc_tmp, gbc->buffer + chunk->compressed_offset,
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chunk->compressed_size);
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uncompressed_size = ff_snappy_peek_uncompressed_length(&gbc_tmp);
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if (uncompressed_size < 0) {
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return uncompressed_size;
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}
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chunk->uncompressed_size = uncompressed_size;
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} else if (chunk->compressor == HAP_COMP_NONE) {
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chunk->uncompressed_size = chunk->compressed_size;
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} else {
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return AVERROR_INVALIDDATA;
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}
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ctx->tex_size += chunk->uncompressed_size;
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}
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av_log(avctx, AV_LOG_DEBUG, "%s compressor\n", compressorstr);
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return ret;
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}
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static int decompress_chunks_thread(AVCodecContext *avctx, void *arg,
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int chunk_nb, int thread_nb)
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{
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HapContext *ctx = avctx->priv_data;
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HapChunk *chunk = &ctx->chunks[chunk_nb];
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GetByteContext gbc;
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uint8_t *dst = ctx->tex_buf + chunk->uncompressed_offset;
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bytestream2_init(&gbc, ctx->gbc.buffer + chunk->compressed_offset, chunk->compressed_size);
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if (chunk->compressor == HAP_COMP_SNAPPY) {
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int ret;
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int64_t uncompressed_size = ctx->tex_size;
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/* Uncompress the frame */
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ret = ff_snappy_uncompress(&gbc, dst, &uncompressed_size);
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if (ret < 0) {
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av_log(avctx, AV_LOG_ERROR, "Snappy uncompress error\n");
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return ret;
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}
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} else if (chunk->compressor == HAP_COMP_NONE) {
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bytestream2_get_buffer(&gbc, dst, chunk->compressed_size);
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}
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return 0;
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}
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static int decompress_texture_thread_internal(AVCodecContext *avctx, void *arg,
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int slice, int thread_nb, int texture_num)
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{
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HapContext *ctx = avctx->priv_data;
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AVFrame *frame = arg;
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const uint8_t *d = ctx->tex_data;
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int w_block = avctx->coded_width / TEXTURE_BLOCK_W;
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int h_block = avctx->coded_height / TEXTURE_BLOCK_H;
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int x, y;
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int start_slice, end_slice;
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int base_blocks_per_slice = h_block / ctx->slice_count;
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int remainder_blocks = h_block % ctx->slice_count;
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/* When the frame height (in blocks) doesn't divide evenly between the
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* number of slices, spread the remaining blocks evenly between the first
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* operations */
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start_slice = slice * base_blocks_per_slice;
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/* Add any extra blocks (one per slice) that have been added before this slice */
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start_slice += FFMIN(slice, remainder_blocks);
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end_slice = start_slice + base_blocks_per_slice;
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/* Add an extra block if there are still remainder blocks to be accounted for */
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if (slice < remainder_blocks)
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end_slice++;
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for (y = start_slice; y < end_slice; y++) {
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uint8_t *p = frame->data[0] + y * frame->linesize[0] * TEXTURE_BLOCK_H;
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int off = y * w_block;
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for (x = 0; x < w_block; x++) {
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if (texture_num == 0) {
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ctx->tex_fun(p + x * 4 * ctx->uncompress_pix_size, frame->linesize[0],
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d + (off + x) * ctx->tex_rat);
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} else {
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ctx->tex_fun2(p + x * 4 * ctx->uncompress_pix_size, frame->linesize[0],
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d + (off + x) * ctx->tex_rat2);
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}
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}
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}
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return 0;
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}
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static int decompress_texture_thread(AVCodecContext *avctx, void *arg,
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int slice, int thread_nb)
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{
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return decompress_texture_thread_internal(avctx, arg, slice, thread_nb, 0);
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}
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static int decompress_texture2_thread(AVCodecContext *avctx, void *arg,
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int slice, int thread_nb)
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{
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return decompress_texture_thread_internal(avctx, arg, slice, thread_nb, 1);
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}
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static int hap_decode(AVCodecContext *avctx, void *data,
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int *got_frame, AVPacket *avpkt)
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{
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HapContext *ctx = avctx->priv_data;
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ThreadFrame tframe;
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int ret, i, t;
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int section_size;
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enum HapSectionType section_type;
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int start_texture_section = 0;
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int tex_rat[2] = {0, 0};
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bytestream2_init(&ctx->gbc, avpkt->data, avpkt->size);
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tex_rat[0] = ctx->tex_rat;
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/* check for multi texture header */
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if (ctx->texture_count == 2) {
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ret = ff_hap_parse_section_header(&ctx->gbc, §ion_size, §ion_type);
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if (ret != 0)
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return ret;
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if ((section_type & 0x0F) != 0x0D) {
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av_log(avctx, AV_LOG_ERROR, "Invalid section type in 2 textures mode %#04x.\n", section_type);
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return AVERROR_INVALIDDATA;
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}
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start_texture_section = 4;
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tex_rat[1] = ctx->tex_rat2;
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}
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/* Get the output frame ready to receive data */
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tframe.f = data;
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ret = ff_thread_get_buffer(avctx, &tframe, 0);
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if (ret < 0)
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return ret;
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for (t = 0; t < ctx->texture_count; t++) {
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bytestream2_seek(&ctx->gbc, start_texture_section, SEEK_SET);
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/* Check for section header */
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ret = hap_parse_frame_header(avctx);
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if (ret < 0)
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return ret;
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if (ctx->tex_size != (avctx->coded_width / TEXTURE_BLOCK_W)
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*(avctx->coded_height / TEXTURE_BLOCK_H)
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*tex_rat[t]) {
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av_log(avctx, AV_LOG_ERROR, "uncompressed size mismatches\n");
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return AVERROR_INVALIDDATA;
|
||
|
|
}
|
||
|
|
|
||
|
|
start_texture_section += ctx->texture_section_size + 4;
|
||
|
|
|
||
|
|
if (avctx->codec->update_thread_context)
|
||
|
|
ff_thread_finish_setup(avctx);
|
||
|
|
|
||
|
|
/* Unpack the DXT texture */
|
||
|
|
if (hap_can_use_tex_in_place(ctx)) {
|
||
|
|
int tex_size;
|
||
|
|
/* Only DXTC texture compression in a contiguous block */
|
||
|
|
ctx->tex_data = ctx->gbc.buffer;
|
||
|
|
tex_size = FFMIN(ctx->texture_section_size, bytestream2_get_bytes_left(&ctx->gbc));
|
||
|
|
if (tex_size < (avctx->coded_width / TEXTURE_BLOCK_W)
|
||
|
|
*(avctx->coded_height / TEXTURE_BLOCK_H)
|
||
|
|
*tex_rat[t]) {
|
||
|
|
av_log(avctx, AV_LOG_ERROR, "Insufficient data\n");
|
||
|
|
return AVERROR_INVALIDDATA;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
/* Perform the second-stage decompression */
|
||
|
|
ret = av_reallocp(&ctx->tex_buf, ctx->tex_size);
|
||
|
|
if (ret < 0)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
avctx->execute2(avctx, decompress_chunks_thread, NULL,
|
||
|
|
ctx->chunk_results, ctx->chunk_count);
|
||
|
|
|
||
|
|
for (i = 0; i < ctx->chunk_count; i++) {
|
||
|
|
if (ctx->chunk_results[i] < 0)
|
||
|
|
return ctx->chunk_results[i];
|
||
|
|
}
|
||
|
|
|
||
|
|
ctx->tex_data = ctx->tex_buf;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Use the decompress function on the texture, one block per thread */
|
||
|
|
if (t == 0){
|
||
|
|
avctx->execute2(avctx, decompress_texture_thread, tframe.f, NULL, ctx->slice_count);
|
||
|
|
} else{
|
||
|
|
tframe.f = data;
|
||
|
|
avctx->execute2(avctx, decompress_texture2_thread, tframe.f, NULL, ctx->slice_count);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Frame is ready to be output */
|
||
|
|
tframe.f->pict_type = AV_PICTURE_TYPE_I;
|
||
|
|
tframe.f->key_frame = 1;
|
||
|
|
*got_frame = 1;
|
||
|
|
|
||
|
|
return avpkt->size;
|
||
|
|
}
|
||
|
|
|
||
|
|
static av_cold int hap_init(AVCodecContext *avctx)
|
||
|
|
{
|
||
|
|
HapContext *ctx = avctx->priv_data;
|
||
|
|
const char *texture_name;
|
||
|
|
int ret = av_image_check_size(avctx->width, avctx->height, 0, avctx);
|
||
|
|
|
||
|
|
if (ret < 0) {
|
||
|
|
av_log(avctx, AV_LOG_ERROR, "Invalid video size %dx%d.\n",
|
||
|
|
avctx->width, avctx->height);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Since codec is based on 4x4 blocks, size is aligned to 4 */
|
||
|
|
avctx->coded_width = FFALIGN(avctx->width, TEXTURE_BLOCK_W);
|
||
|
|
avctx->coded_height = FFALIGN(avctx->height, TEXTURE_BLOCK_H);
|
||
|
|
|
||
|
|
ff_texturedsp_init(&ctx->dxtc);
|
||
|
|
|
||
|
|
ctx->texture_count = 1;
|
||
|
|
ctx->uncompress_pix_size = 4;
|
||
|
|
|
||
|
|
switch (avctx->codec_tag) {
|
||
|
|
case MKTAG('H','a','p','1'):
|
||
|
|
texture_name = "DXT1";
|
||
|
|
ctx->tex_rat = 8;
|
||
|
|
ctx->tex_fun = ctx->dxtc.dxt1_block;
|
||
|
|
avctx->pix_fmt = AV_PIX_FMT_RGB0;
|
||
|
|
break;
|
||
|
|
case MKTAG('H','a','p','5'):
|
||
|
|
texture_name = "DXT5";
|
||
|
|
ctx->tex_rat = 16;
|
||
|
|
ctx->tex_fun = ctx->dxtc.dxt5_block;
|
||
|
|
avctx->pix_fmt = AV_PIX_FMT_RGBA;
|
||
|
|
break;
|
||
|
|
case MKTAG('H','a','p','Y'):
|
||
|
|
texture_name = "DXT5-YCoCg-scaled";
|
||
|
|
ctx->tex_rat = 16;
|
||
|
|
ctx->tex_fun = ctx->dxtc.dxt5ys_block;
|
||
|
|
avctx->pix_fmt = AV_PIX_FMT_RGB0;
|
||
|
|
break;
|
||
|
|
case MKTAG('H','a','p','A'):
|
||
|
|
texture_name = "RGTC1";
|
||
|
|
ctx->tex_rat = 8;
|
||
|
|
ctx->tex_fun = ctx->dxtc.rgtc1u_gray_block;
|
||
|
|
avctx->pix_fmt = AV_PIX_FMT_GRAY8;
|
||
|
|
ctx->uncompress_pix_size = 1;
|
||
|
|
break;
|
||
|
|
case MKTAG('H','a','p','M'):
|
||
|
|
texture_name = "DXT5-YCoCg-scaled / RGTC1";
|
||
|
|
ctx->tex_rat = 16;
|
||
|
|
ctx->tex_rat2 = 8;
|
||
|
|
ctx->tex_fun = ctx->dxtc.dxt5ys_block;
|
||
|
|
ctx->tex_fun2 = ctx->dxtc.rgtc1u_alpha_block;
|
||
|
|
avctx->pix_fmt = AV_PIX_FMT_RGBA;
|
||
|
|
ctx->texture_count = 2;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
return AVERROR_DECODER_NOT_FOUND;
|
||
|
|
}
|
||
|
|
|
||
|
|
av_log(avctx, AV_LOG_DEBUG, "%s texture\n", texture_name);
|
||
|
|
|
||
|
|
ctx->slice_count = av_clip(avctx->thread_count, 1,
|
||
|
|
avctx->coded_height / TEXTURE_BLOCK_H);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static av_cold int hap_close(AVCodecContext *avctx)
|
||
|
|
{
|
||
|
|
HapContext *ctx = avctx->priv_data;
|
||
|
|
|
||
|
|
ff_hap_free_context(ctx);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
AVCodec ff_hap_decoder = {
|
||
|
|
.name = "hap",
|
||
|
|
.long_name = NULL_IF_CONFIG_SMALL("Vidvox Hap"),
|
||
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
||
|
|
.id = AV_CODEC_ID_HAP,
|
||
|
|
.init = hap_init,
|
||
|
|
.decode = hap_decode,
|
||
|
|
.close = hap_close,
|
||
|
|
.priv_data_size = sizeof(HapContext),
|
||
|
|
.capabilities = AV_CODEC_CAP_FRAME_THREADS | AV_CODEC_CAP_SLICE_THREADS |
|
||
|
|
AV_CODEC_CAP_DR1,
|
||
|
|
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
|
||
|
|
FF_CODEC_CAP_INIT_CLEANUP,
|
||
|
|
.codec_tags = (const uint32_t []){
|
||
|
|
MKTAG('H','a','p','1'),
|
||
|
|
MKTAG('H','a','p','5'),
|
||
|
|
MKTAG('H','a','p','Y'),
|
||
|
|
MKTAG('H','a','p','A'),
|
||
|
|
MKTAG('H','a','p','M'),
|
||
|
|
FF_CODEC_TAGS_END,
|
||
|
|
},
|
||
|
|
};
|