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dtshddec.c
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1 /*
2  * Raw DTS-HD demuxer
3  * Copyright (c) 2012 Paul B Mahol
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "libavutil/intreadwrite.h"
23 #include "libavutil/dict.h"
24 #include "libavcodec/dca.h"
25 #include "avformat.h"
26 #include "internal.h"
27 
28 #define AUPR_HDR 0x415550522D484452
29 #define AUPRINFO 0x41555052494E464F
30 #define BITSHVTB 0x4249545348565442
31 #define BLACKOUT 0x424C41434B4F5554
32 #define BRANCHPT 0x4252414E43485054
33 #define BUILDVER 0x4255494C44564552
34 #define CORESSMD 0x434F524553534D44
35 #define DTSHDHDR 0x4454534844484452
36 #define EXTSS_MD 0x45585453535f4d44
37 #define FILEINFO 0x46494C45494E464F
38 #define NAVI_TBL 0x4E4156492D54424C
39 #define STRMDATA 0x5354524D44415441
40 #define TIMECODE 0x54494D45434F4445
41 
42 typedef struct DTSHDDemuxContext {
43  uint64_t data_end;
45 
46 static int dtshd_probe(AVProbeData *p)
47 {
48  if (AV_RB64(p->buf) == DTSHDHDR)
49  return AVPROBE_SCORE_MAX;
50  return 0;
51 }
52 
54 {
55  DTSHDDemuxContext *dtshd = s->priv_data;
56  AVIOContext *pb = s->pb;
57  uint64_t chunk_type, chunk_size;
58  int64_t duration, data_start;
59  AVStream *st;
60  int ret;
61  char *value;
62 
63  st = avformat_new_stream(s, NULL);
64  if (!st)
65  return AVERROR(ENOMEM);
69 
70  for (;;) {
71  chunk_type = avio_rb64(pb);
72  chunk_size = avio_rb64(pb);
73 
74  if (avio_feof(pb))
75  break;
76 
77  if (chunk_size < 4) {
78  av_log(s, AV_LOG_ERROR, "chunk size too small\n");
79  return AVERROR_INVALIDDATA;
80  }
81  if (chunk_size > ((uint64_t)1 << 61)) {
82  av_log(s, AV_LOG_ERROR, "chunk size too big\n");
83  return AVERROR_INVALIDDATA;
84  }
85 
86  switch (chunk_type) {
87  case STRMDATA:
88  data_start = avio_tell(pb);
89  dtshd->data_end = data_start + chunk_size;
90  if (dtshd->data_end <= chunk_size)
91  return AVERROR_INVALIDDATA;
92  if (!pb->seekable)
93  goto break_loop;
94  goto skip;
95  break;
96  case AUPR_HDR:
97  if (chunk_size < 21)
98  return AVERROR_INVALIDDATA;
99  avio_skip(pb, 3);
100  st->codecpar->sample_rate = avio_rb24(pb);
101  if (!st->codecpar->sample_rate)
102  return AVERROR_INVALIDDATA;
103  duration = avio_rb32(pb); // num_frames
104  duration *= avio_rb16(pb); // samples_per_frames
105  st->duration = duration;
106  avio_skip(pb, 5);
109  avio_skip(pb, chunk_size - 21);
110  break;
111  case FILEINFO:
112  if (chunk_size > INT_MAX)
113  goto skip;
114  value = av_malloc(chunk_size);
115  if (!value)
116  goto skip;
117  avio_read(pb, value, chunk_size);
118  value[chunk_size - 1] = 0;
119  av_dict_set(&s->metadata, "fileinfo", value,
121  break;
122  default:
123 skip:
124  ret = avio_skip(pb, chunk_size);
125  if (ret < 0)
126  return ret;
127  };
128  }
129 
130  if (!dtshd->data_end)
131  return AVERROR_EOF;
132 
133  avio_seek(pb, data_start, SEEK_SET);
134 
135 break_loop:
136  if (st->codecpar->sample_rate)
137  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
138 
139  return 0;
140 }
141 
143 {
144  DTSHDDemuxContext *dtshd = s->priv_data;
145  int64_t size, left;
146  int ret;
147 
148  left = dtshd->data_end - avio_tell(s->pb);
149  size = FFMIN(left, 1024);
150  if (size <= 0)
151  return AVERROR_EOF;
152 
153  ret = av_get_packet(s->pb, pkt, size);
154  if (ret < 0)
155  return ret;
156 
157  pkt->stream_index = 0;
158 
159  return ret;
160 }
161 
163  .name = "dtshd",
164  .long_name = NULL_IF_CONFIG_SMALL("raw DTS-HD"),
165  .priv_data_size = sizeof(DTSHDDemuxContext),
170  .extensions = "dtshd",
171  .raw_codec_id = AV_CODEC_ID_DTS,
172 };
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:768
Bytestream IO Context.
Definition: avio.h:147
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4507
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3953
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:230
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:304
static AVPacket pkt
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:742
AVInputFormat ff_dtshd_demuxer
Definition: dtshddec.c:162
Format I/O context.
Definition: avformat.h:1327
#define AUPR_HDR
Definition: dtshddec.c:28
Public dictionary API.
#define av_malloc(s)
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:757
enum AVStreamParseType need_parsing
Definition: avformat.h:1065
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4140
int64_t duration
Definition: movenc.c:63
int initial_padding
Audio only.
Definition: avcodec.h:4082
#define AVERROR_EOF
End of file.
Definition: error.h:55
int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
Allocate and read the payload of a packet and initialize its fields with default values.
Definition: utils.c:260
ptrdiff_t size
Definition: opengl_enc.c:101
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:824
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:511
full parsing and repack with timestamp and position generation by parser for raw this assumes that ea...
Definition: avformat.h:812
#define av_log(a,...)
#define DTSHDHDR
Definition: dtshddec.c:35
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:604
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1541
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3949
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:463
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:243
unsigned int avio_rb24(AVIOContext *s)
Definition: aviobuf.c:750
#define FILEINFO
Definition: dtshddec.c:37
#define FFMIN(a, b)
Definition: common.h:96
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that's been allocated with av_malloc() or another memory allocation functio...
Definition: dict.h:76
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
GLsizei GLboolean const GLfloat * value
Definition: opengl_enc.c:109
static int dtshd_read_header(AVFormatContext *s)
Definition: dtshddec.c:53
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:514
Stream structure.
Definition: avformat.h:878
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
static int raw_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: dtshddec.c:142
AVIOContext * pb
I/O context.
Definition: avformat.h:1369
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:70
uint64_t data_end
Definition: dtshddec.c:43
#define AVFMT_GENERIC_INDEX
Use generic index building code.
Definition: avformat.h:487
This structure contains the data a format has to probe a file.
Definition: avformat.h:461
static int dtshd_probe(AVProbeData *p)
Definition: dtshddec.c:46
static int ff_dca_count_chs_for_mask(unsigned int mask)
Return number of individual channels in DCASpeakerPair mask.
Definition: dca.h:116
static int flags
Definition: cpu.c:47
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:932
int sample_rate
Audio only.
Definition: avcodec.h:4063
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:473
#define STRMDATA
Definition: dtshddec.c:39
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_RB64
Definition: bytestream.h:87
Main libavformat public API header.
void * priv_data
Format private data.
Definition: avformat.h:1355
int channels
Audio only.
Definition: avcodec.h:4059
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:662
AVCodecParameters * codecpar
Definition: avformat.h:1230
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:328
int stream_index
Definition: avcodec.h:1592
This structure stores compressed data.
Definition: avcodec.h:1567