FFmpeg
argo_asf.h
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1 /*
2  * Argonaut Games ASF (de)muxer
3  *
4  * Copyright (C) 2020 Zane van Iperen (zane@zanevaniperen.com)
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #ifndef AVFORMAT_ARGO_ASF_H
24 #define AVFORMAT_ARGO_ASF_H
25 
26 #include <stdint.h>
27 #include "libavutil/common.h"
28 
29 #include "avformat.h"
30 
31 #define ASF_TAG MKTAG('A', 'S', 'F', '\0')
32 #define ASF_FILE_HEADER_SIZE 24
33 #define ASF_CHUNK_HEADER_SIZE 20
34 #define ASF_SAMPLE_COUNT 32
35 #define ASF_MIN_BUFFER_SIZE FFMAX(ASF_FILE_HEADER_SIZE, ASF_CHUNK_HEADER_SIZE)
36 
37 typedef struct ArgoASFFileHeader {
38  uint32_t magic; /*< Magic Number, {'A', 'S', 'F', '\0'} */
39  uint16_t version_major; /*< File Major Version. */
40  uint16_t version_minor; /*< File Minor Version. */
41  uint32_t num_chunks; /*< No. chunks in the file. */
42  uint32_t chunk_offset; /*< Offset to the first chunk from the start of the file. */
43  int8_t name[8]; /*< Name. */
45 
46 typedef struct ArgoASFChunkHeader {
47  uint32_t num_blocks; /*< No. blocks in the chunk. */
48  uint32_t num_samples; /*< No. samples per channel in a block. Always 32. */
49  uint32_t unk1; /*< Unknown */
50  uint16_t sample_rate; /*< Sample rate. */
51  uint16_t unk2; /*< Unknown. */
52  uint32_t flags; /*< Stream flags. */
54 
55 enum {
56  ASF_CF_BITS_PER_SAMPLE = (1 << 0), /*< 16-bit if set, 8 otherwise. */
57  ASF_CF_STEREO = (1 << 1), /*< Stereo if set, mono otherwise. */
58  ASF_CF_ALWAYS1_1 = (1 << 2), /*< Unknown, always seems to be set. */
59  ASF_CF_ALWAYS1_2 = (1 << 3), /*< Unknown, always seems to be set. */
60 
63 };
64 
65 void ff_argo_asf_parse_file_header(ArgoASFFileHeader *hdr, const uint8_t *buf);
67 void ff_argo_asf_parse_chunk_header(ArgoASFChunkHeader *hdr, const uint8_t *buf);
69  const ArgoASFChunkHeader *ckhdr);
70 
71 #endif /* AVFORMAT_ARGO_ASF_H */
ArgoASFChunkHeader::sample_rate
uint16_t sample_rate
Definition: argo_asf.h:50
ArgoASFChunkHeader::num_samples
uint32_t num_samples
Definition: argo_asf.h:48
ArgoASFChunkHeader::flags
uint32_t flags
Definition: argo_asf.h:52
ArgoASFChunkHeader::unk2
uint16_t unk2
Definition: argo_asf.h:51
ASF_CF_ALWAYS1_2
@ ASF_CF_ALWAYS1_2
Definition: argo_asf.h:59
ASF_CF_BITS_PER_SAMPLE
@ ASF_CF_BITS_PER_SAMPLE
Definition: argo_asf.h:56
ArgoASFFileHeader::version_minor
uint16_t version_minor
Definition: argo_asf.h:40
ArgoASFChunkHeader
Definition: argo_asf.h:46
ff_argo_asf_validate_file_header
int ff_argo_asf_validate_file_header(AVFormatContext *s, const ArgoASFFileHeader *hdr)
Definition: argo_asf.c:57
s
#define s(width, name)
Definition: cbs_vp9.c:257
ArgoASFFileHeader::num_chunks
uint32_t num_chunks
Definition: argo_asf.h:41
ASF_CF_STEREO
@ ASF_CF_STEREO
Definition: argo_asf.h:57
ff_argo_asf_parse_chunk_header
void ff_argo_asf_parse_chunk_header(ArgoASFChunkHeader *hdr, const uint8_t *buf)
Definition: argo_asf.c:68
AVFormatContext
Format I/O context.
Definition: avformat.h:1097
ASF_CF_ALWAYS0
@ ASF_CF_ALWAYS0
Definition: argo_asf.h:62
ff_argo_asf_fill_stream
int ff_argo_asf_fill_stream(AVFormatContext *s, AVStream *st, const ArgoASFFileHeader *fhdr, const ArgoASFChunkHeader *ckhdr)
Definition: argo_asf.c:78
ArgoASFFileHeader::version_major
uint16_t version_major
Definition: argo_asf.h:39
ArgoASFFileHeader::chunk_offset
uint32_t chunk_offset
Definition: argo_asf.h:42
common.h
ff_argo_asf_parse_file_header
void ff_argo_asf_parse_file_header(ArgoASFFileHeader *hdr, const uint8_t *buf)
Definition: argo_asf.c:46
AVStream
Stream structure.
Definition: avformat.h:837
ArgoASFChunkHeader::num_blocks
uint32_t num_blocks
Definition: argo_asf.h:47
avformat.h
ArgoASFFileHeader
Definition: argo_asf.h:37
ArgoASFChunkHeader::unk1
uint32_t unk1
Definition: argo_asf.h:49
ArgoASFFileHeader::name
int8_t name[8]
Definition: argo_asf.h:43
ASF_CF_ALWAYS1
@ ASF_CF_ALWAYS1
Definition: argo_asf.h:61
ASF_CF_ALWAYS1_1
@ ASF_CF_ALWAYS1_1
Definition: argo_asf.h:58
ArgoASFFileHeader::magic
uint32_t magic
Definition: argo_asf.h:38