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rsd.c
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1 /*
2  * RSD demuxer
3  * Copyright (c) 2013 James Almer
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 "libavcodec/bytestream.h"
23 #include "libavutil/intreadwrite.h"
24 #include "avformat.h"
25 #include "avio.h"
26 #include "internal.h"
27 
28 static const AVCodecTag rsd_tags[] = {
29  { AV_CODEC_ID_ADPCM_THP, MKTAG('G','A','D','P') },
30  { AV_CODEC_ID_ADPCM_IMA_RAD, MKTAG('R','A','D','P') },
31  { AV_CODEC_ID_PCM_S16BE, MKTAG('P','C','M','B') },
32  { AV_CODEC_ID_PCM_S16LE, MKTAG('P','C','M',' ') },
33  { AV_CODEC_ID_NONE, 0 },
34 };
35 
36 static const uint32_t rsd_unsupported_tags[] = {
37  MKTAG('O','G','G',' '),
38  MKTAG('V','A','G',' '),
39  MKTAG('W','A','D','P'),
40  MKTAG('X','A','D','P'),
41  MKTAG('X','M','A',' '),
42 };
43 
44 static int rsd_probe(AVProbeData *p)
45 {
46  if (memcmp(p->buf, "RSD", 3) || p->buf[3] - '0' < 2 || p->buf[3] - '0' > 6)
47  return 0;
48  if (AV_RL32(p->buf + 8) > 256 || !AV_RL32(p->buf + 8))
49  return AVPROBE_SCORE_MAX / 8;
50  if (AV_RL32(p->buf + 16) > 8*48000 || !AV_RL32(p->buf + 16))
51  return AVPROBE_SCORE_MAX / 8;
52  return AVPROBE_SCORE_MAX;
53 }
54 
56 {
57  AVIOContext *pb = s->pb;
58  int i, version, start = 0x800;
59  AVCodecContext *codec;
61 
62  if (!st)
63  return AVERROR(ENOMEM);
64 
65  avio_skip(pb, 3); // "RSD"
66  version = avio_r8(pb) - '0';
67 
68  codec = st->codec;
70  codec->codec_tag = avio_rl32(pb);
71  codec->codec_id = ff_codec_get_id(rsd_tags, codec->codec_tag);
72  if (!codec->codec_id) {
73  char tag_buf[32];
74 
75  av_get_codec_tag_string(tag_buf, sizeof(tag_buf), codec->codec_tag);
76  for (i=0; i < FF_ARRAY_ELEMS(rsd_unsupported_tags); i++) {
77  if (codec->codec_tag == rsd_unsupported_tags[i]) {
78  avpriv_request_sample(s, "Codec tag: %s", tag_buf);
79  return AVERROR_PATCHWELCOME;
80  }
81  }
82  av_log(s, AV_LOG_ERROR, "Unknown codec tag: %s\n", tag_buf);
83  return AVERROR_INVALIDDATA;
84  }
85 
86  codec->channels = avio_rl32(pb);
87  if (!codec->channels)
88  return AVERROR_INVALIDDATA;
89 
90  avio_skip(pb, 4); // Bit depth
91  codec->sample_rate = avio_rl32(pb);
92  if (!codec->sample_rate)
93  return AVERROR_INVALIDDATA;
94 
95  avio_skip(pb, 4); // Unknown
96 
97  switch (codec->codec_id) {
99  codec->block_align = 20 * codec->channels;
100  if (pb->seekable)
101  st->duration = av_get_audio_frame_duration(codec, avio_size(pb) - start);
102  break;
104  /* RSD3GADP is mono, so only alloc enough memory
105  to store the coeff table for a single channel. */
106 
107  start = avio_rl32(pb);
108 
109  if (ff_get_extradata(codec, s->pb, 32) < 0)
110  return AVERROR(ENOMEM);
111 
112  for (i = 0; i < 16; i++)
113  AV_WB16(codec->extradata + i * 2, AV_RL16(codec->extradata + i * 2));
114 
115  if (pb->seekable)
116  st->duration = (avio_size(pb) - start) / 8 * 14;
117  break;
120  if (version != 4)
121  start = avio_rl32(pb);
122 
123  if (pb->seekable)
124  st->duration = (avio_size(pb) - start) / 2 / codec->channels;
125  break;
126  }
127 
128  avio_skip(pb, start - avio_tell(pb));
129 
130  avpriv_set_pts_info(st, 64, 1, codec->sample_rate);
131 
132  return 0;
133 }
134 
136 {
137  AVCodecContext *codec = s->streams[0]->codec;
138  int ret, size = 1024;
139 
140  if (avio_feof(s->pb))
141  return AVERROR_EOF;
142 
143  if (codec->codec_id == AV_CODEC_ID_ADPCM_IMA_RAD)
144  ret = av_get_packet(s->pb, pkt, codec->block_align);
145  else
146  ret = av_get_packet(s->pb, pkt, size);
147 
148  if (ret != size) {
149  if (ret < 0) {
150  av_free_packet(pkt);
151  return ret;
152  }
153  av_shrink_packet(pkt, ret);
154  }
155  pkt->stream_index = 0;
156 
157  return ret;
158 }
159 
161  .name = "rsd",
162  .long_name = NULL_IF_CONFIG_SMALL("GameCube RSD"),
163  .read_probe = rsd_probe,
164  .read_header = rsd_read_header,
165  .read_packet = rsd_read_packet,
166  .extensions = "rsd",
167  .codec_tag = (const AVCodecTag* const []){rsd_tags, 0},
168 };
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:631
Bytestream IO Context.
Definition: avio.h:111
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:282
Buffered I/O operations.
void av_free_packet(AVPacket *pkt)
Free a packet.
Definition: avpacket.c:280
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:2773
void av_shrink_packet(AVPacket *pkt, int size)
Reduce packet size, correctly zeroing padding.
Definition: avpacket.c:103
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:4083
int ff_get_extradata(AVCodecContext *avctx, AVIOContext *pb, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0 and f...
Definition: utils.c:2945
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:277
size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
Put a string representing the codec tag codec_tag in buf.
Definition: utils.c:3055
int version
Definition: avisynth_c.h:629
static AVPacket pkt
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:87
int block_align
number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs...
Definition: avcodec.h:2299
Format I/O context.
Definition: avformat.h:1273
static int rsd_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: rsd.c:135
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
static int rsd_probe(AVProbeData *p)
Definition: rsd.c:44
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1617
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:3749
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1341
#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:244
ptrdiff_t size
Definition: opengl_enc.c:101
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:390
#define AV_WB16(p, v)
Definition: intreadwrite.h:405
static const AVCodecTag rsd_tags[]
Definition: rsd.c:28
#define av_log(a,...)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:659
#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:175
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:529
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:861
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:450
static const uint32_t rsd_unsupported_tags[]
Definition: rsd.c:36
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:160
static int rsd_read_header(AVFormatContext *s)
Definition: rsd.c:55
#define FF_ARRAY_ELEMS(a)
Stream structure.
Definition: avformat.h:842
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
enum AVMediaType codec_type
Definition: avcodec.h:1510
enum AVCodecID codec_id
Definition: avcodec.h:1519
int sample_rate
samples per second
Definition: avcodec.h:2262
AVIOContext * pb
I/O context.
Definition: avformat.h:1315
main external API structure.
Definition: avcodec.h:1502
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1534
This structure contains the data a format has to probe a file.
Definition: avformat.h:448
int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes)
Return audio frame duration.
Definition: utils.c:3410
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:901
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:460
Main libavformat public API header.
int channels
number of audio channels
Definition: avcodec.h:2263
void INT64 start
Definition: avisynth_c.h:553
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:628
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:301
int stream_index
Definition: avcodec.h:1425
AVInputFormat ff_rsd_demuxer
Definition: rsd.c:160
#define MKTAG(a, b, c, d)
Definition: common.h:330
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
This structure stores compressed data.
Definition: avcodec.h:1400