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/*
* Argonaut Games ASF (de)muxer
*
* Copyright (C) 2020 Zane van Iperen (zane@zanevaniperen.com)
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVFORMAT_ARGO_ASF_H
#define AVFORMAT_ARGO_ASF_H
#include <stdint.h>
#include "libavutil/macros.h"
#include "avformat.h"
#define ASF_TAG MKTAG('A', 'S', 'F', '\0')
#define ASF_FILE_HEADER_SIZE 24
#define ASF_CHUNK_HEADER_SIZE 20
#define ASF_SAMPLE_COUNT 32
#define ASF_MIN_BUFFER_SIZE FFMAX(ASF_FILE_HEADER_SIZE, ASF_CHUNK_HEADER_SIZE)
#define ASF_NAME_SIZE 8
typedef struct ArgoASFFileHeader {
uint32_t magic; /*< Magic Number, {'A', 'S', 'F', '\0'} */
uint16_t version_major; /*< File Major Version. */
uint16_t version_minor; /*< File Minor Version. */
uint32_t num_chunks; /*< No. chunks in the file. */
uint32_t chunk_offset; /*< Offset to the first chunk from the start of the file. */
char name[ASF_NAME_SIZE + 1]; /*< Name, +1 for NULL-terminator. */
} ArgoASFFileHeader;
typedef struct ArgoASFChunkHeader {
uint32_t num_blocks; /*< No. blocks in the chunk. */
uint32_t num_samples; /*< No. samples per channel in a block. Always 32. */
uint32_t unk1; /*< Unknown */
uint16_t sample_rate; /*< Sample rate. */
uint16_t unk2; /*< Unknown. */
uint32_t flags; /*< Stream flags. */
} ArgoASFChunkHeader;
enum {
ASF_CF_BITS_PER_SAMPLE = (1 << 0), /*< 16-bit if set, 8 otherwise. */
ASF_CF_STEREO = (1 << 1), /*< Stereo if set, mono otherwise. */
ASF_CF_ALWAYS1_1 = (1 << 2), /*< Unknown, always seems to be set. */
ASF_CF_ALWAYS1_2 = (1 << 3), /*< Unknown, always seems to be set. */
ASF_CF_ALWAYS1 = ASF_CF_ALWAYS1_1 | ASF_CF_ALWAYS1_2,
ASF_CF_ALWAYS0 = ~(ASF_CF_BITS_PER_SAMPLE | ASF_CF_STEREO | ASF_CF_ALWAYS1)
};
void ff_argo_asf_parse_file_header(ArgoASFFileHeader *hdr, const uint8_t *buf);
int ff_argo_asf_validate_file_header(AVFormatContext *s, const ArgoASFFileHeader *hdr);
void ff_argo_asf_parse_chunk_header(ArgoASFChunkHeader *hdr, const uint8_t *buf);
int ff_argo_asf_fill_stream(AVFormatContext *s, AVStream *st, const ArgoASFFileHeader *fhdr,
const ArgoASFChunkHeader *ckhdr);
#endif /* AVFORMAT_ARGO_ASF_H */
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