bd6fa80d56
The secondary compression in Hap is optional, this change exposes that option to the user as some use-cases favour higher bitrate files to reduce workload decoding. Adds "none" or "snappy" as options for "compressor". Selecting "none" disregards "chunks" option: chunking is only of benefit decompressing Snappy. Reviewed-by: Martin Vignali <martin.vignali@gmail.com> Signed-off-by: Tom Butterworth <bangnoise@gmail.com>
100 lines
2.9 KiB
C
100 lines
2.9 KiB
C
/*
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* Vidvox Hap
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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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* 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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#ifndef AVCODEC_HAP_H
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#define AVCODEC_HAP_H
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#include <stdint.h>
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#include "libavutil/opt.h"
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#include "bytestream.h"
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#include "texturedsp.h"
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enum HapTextureFormat {
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HAP_FMT_RGBDXT1 = 0x0B,
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HAP_FMT_RGBADXT5 = 0x0E,
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HAP_FMT_YCOCGDXT5 = 0x0F,
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};
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enum HapCompressor {
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HAP_COMP_NONE = 0xA0,
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HAP_COMP_SNAPPY = 0xB0,
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HAP_COMP_COMPLEX = 0xC0,
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};
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enum HapSectionType {
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HAP_ST_DECODE_INSTRUCTIONS = 0x01,
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HAP_ST_COMPRESSOR_TABLE = 0x02,
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HAP_ST_SIZE_TABLE = 0x03,
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HAP_ST_OFFSET_TABLE = 0x04,
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};
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typedef struct HapChunk {
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enum HapCompressor compressor;
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int compressed_offset;
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size_t compressed_size;
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int uncompressed_offset;
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size_t uncompressed_size;
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} HapChunk;
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typedef struct HapContext {
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AVClass *class;
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TextureDSPContext dxtc;
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GetByteContext gbc;
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enum HapTextureFormat opt_tex_fmt; /* Texture type (encoder only) */
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int opt_chunk_count; /* User-requested chunk count (encoder only) */
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int opt_compressor; /* User-requested compressor (encoder only) */
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int chunk_count;
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HapChunk *chunks;
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int *chunk_results; /* Results from threaded operations */
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int tex_rat; /* Compression ratio */
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const uint8_t *tex_data; /* Compressed texture */
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uint8_t *tex_buf; /* Buffer for compressed texture */
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size_t tex_size; /* Size of the compressed texture */
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size_t max_snappy; /* Maximum compressed size for snappy buffer */
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int slice_count; /* Number of slices for threaded operations */
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/* Pointer to the selected compress or decompress function */
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int (*tex_fun)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
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} HapContext;
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/*
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* Set the number of chunks in the frame. Returns 0 on success or an error if:
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* - first_in_frame is 0 and the number of chunks has changed
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* - any other error occurs
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*/
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int ff_hap_set_chunk_count(HapContext *ctx, int count, int first_in_frame);
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/*
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* Free resources associated with the context
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*/
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av_cold void ff_hap_free_context(HapContext *ctx);
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#endif /* AVCODEC_HAP_H */
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