FFmpeg  2.1.1
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) &&
47  p->buf[3] - '0' >= 2 && p->buf[3] - '0' <= 6)
49  return 0;
50 }
51 
53 {
54  AVIOContext *pb = s->pb;
55  int i, version, start = 0x800;
56  AVCodecContext *codec;
57  AVStream *st = avformat_new_stream(s, NULL);
58 
59  if (!st)
60  return AVERROR(ENOMEM);
61 
62  avio_skip(pb, 3); // "RSD"
63  version = avio_r8(pb) - '0';
64 
65  codec = st->codec;
67  codec->codec_tag = avio_rl32(pb);
68  codec->codec_id = ff_codec_get_id(rsd_tags, codec->codec_tag);
69  if (!codec->codec_id) {
70  char tag_buf[5];
71 
72  av_get_codec_tag_string(tag_buf, sizeof(tag_buf), codec->codec_tag);
73  for (i=0; i < FF_ARRAY_ELEMS(rsd_unsupported_tags); i++) {
74  if (codec->codec_tag == rsd_unsupported_tags[i]) {
75  avpriv_request_sample(s, "Codec tag: %s", tag_buf);
76  return AVERROR_PATCHWELCOME;
77  }
78  }
79  av_log(s, AV_LOG_ERROR, "Unknown codec tag: %s\n", tag_buf);
80  return AVERROR_INVALIDDATA;
81  }
82 
83  codec->channels = avio_rl32(pb);
84  if (!codec->channels)
85  return AVERROR_INVALIDDATA;
86 
87  avio_skip(pb, 4); // Bit depth
88  codec->sample_rate = avio_rl32(pb);
89  if (!codec->sample_rate)
90  return AVERROR_INVALIDDATA;
91 
92  avio_skip(pb, 4); // Unknown
93 
94  switch (codec->codec_id) {
96  codec->block_align = 20 * codec->channels;
97  if (pb->seekable)
98  st->duration = av_get_audio_frame_duration(codec, avio_size(pb) - start);
99  break;
101  /* RSD3GADP is mono, so only alloc enough memory
102  to store the coeff table for a single channel. */
103 
104  if (ff_alloc_extradata(codec, 32))
105  return AVERROR(ENOMEM);
106 
107  start = avio_rl32(pb);
108 
109  if (avio_read(s->pb, codec->extradata, 32) != 32)
110  return AVERROR_INVALIDDATA;
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 (url_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 };
const char * s
Definition: avisynth_c.h:668
Bytestream IO Context.
Definition: avio.h:68
#define AVERROR_PATCHWELCOME
int size
void av_free_packet(AVPacket *pkt)
Free a packet.
Definition: avpacket.c:279
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:2556
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:478
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:3922
#define AV_RL16(x)
Definition: intreadwrite.h:245
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:261
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:686
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:593
void av_log(void *avcl, int level, const char *fmt,...) av_printf_format(3
Send the specified message to the log if the level is less than or equal to the current av_log_level...
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:2646
int version
Definition: avisynth_c.h:666
int block_align
number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs...
Definition: avcodec.h:1910
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:471
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1254
Format I/O context.
Definition: avformat.h:968
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.
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:336
static int rsd_probe(AVProbeData *p)
Definition: rsd.c:44
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:248
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:3348
static const AVCodecTag rsd_tags[]
Definition: rsd.c:28
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:200
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: avcodec.h:4147
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:151
#define FF_ARRAY_ELEMS(a)
Definition: avcodec.h:929
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:117
ret
Definition: avfilter.c:961
AVStream ** streams
Definition: avformat.h:1016
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:341
static int rsd_read_header(AVFormatContext *s)
Definition: rsd.c:52
Stream structure.
Definition: avformat.h:667
Buffered I/O operations.
enum AVMediaType codec_type
Definition: avcodec.h:1154
enum AVCodecID codec_id
Definition: avcodec.h:1157
int sample_rate
samples per second
Definition: avcodec.h:1873
main external API structure.
Definition: avcodec.h:1146
unsigned int codec_tag
fourcc (LSB first, so &quot;ABCD&quot; -&gt; (&#39;D&#39;&lt;&lt;24) + (&#39;C&#39;&lt;&lt;16) + (&#39;B&#39;&lt;&lt;8) + &#39;A&#39;).
Definition: avcodec.h:1172
int ff_alloc_extradata(AVCodecContext *avctx, int size)
Allocate extradata with additional FF_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0...
Definition: utils.c:2690
AVIOContext * pb
I/O context.
Definition: avformat.h:1001
#define MKTAG(a, b, c, d)
#define AV_WB16(p, darg)
Definition: intreadwrite.h:237
This structure contains the data a format has to probe a file.
Definition: avformat.h:334
int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes)
Return audio frame duration.
Definition: utils.c:2946
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:256
#define AVERROR_EOF
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:720
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:480
int url_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:280
Main libavformat public API header.
#define AVERROR_INVALIDDATA
int channels
number of audio channels
Definition: avcodec.h:1874
#define AVERROR(e)
void INT64 start
Definition: avisynth_c.h:594
static AVPacket pkt
Definition: demuxing.c:52
int stream_index
Definition: avcodec.h:1065
AVInputFormat ff_rsd_demuxer
Definition: rsd.c:160
This structure stores compressed data.
Definition: avcodec.h:1040