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smush.c
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1 /*
2  * LucasArts Smush demuxer
3  * Copyright (c) 2006 Cyril Zorin
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 
24 #include "avformat.h"
25 #include "avio.h"
26 #include "internal.h"
27 
28 typedef struct SMUSHContext {
29  int version;
32 } SMUSHContext;
33 
35 {
36  if (((AV_RL32(p->buf) == MKTAG('S', 'A', 'N', 'M') &&
37  AV_RL32(p->buf + 8) == MKTAG('S', 'H', 'D', 'R')) ||
38  (AV_RL32(p->buf) == MKTAG('A', 'N', 'I', 'M') &&
39  AV_RL32(p->buf + 8) == MKTAG('A', 'H', 'D', 'R')))) {
40  return AVPROBE_SCORE_MAX;
41  }
42 
43  return 0;
44 }
45 
47 {
48  SMUSHContext *smush = ctx->priv_data;
49  AVIOContext *pb = ctx->pb;
50  AVStream *vst, *ast;
51  uint32_t magic, nframes, size, subversion, i;
52  uint32_t width = 0, height = 0, got_audio = 0, read = 0;
53  uint32_t sample_rate, channels, palette[256];
54 
55  magic = avio_rb32(pb);
56  avio_skip(pb, 4); // skip movie size
57 
58  if (magic == MKBETAG('A', 'N', 'I', 'M')) {
59  if (avio_rb32(pb) != MKBETAG('A', 'H', 'D', 'R'))
60  return AVERROR_INVALIDDATA;
61 
62  size = avio_rb32(pb);
63  if (size < 3 * 256 + 6)
64  return AVERROR_INVALIDDATA;
65 
66  smush->version = 0;
67  subversion = avio_rl16(pb);
68  nframes = avio_rl16(pb);
69  if (!nframes)
70  return AVERROR_INVALIDDATA;
71 
72  avio_skip(pb, 2); // skip pad
73 
74  for (i = 0; i < 256; i++)
75  palette[i] = avio_rb24(pb);
76 
77  avio_skip(pb, size - (3 * 256 + 6));
78  } else if (magic == MKBETAG('S', 'A', 'N', 'M')) {
79  if (avio_rb32(pb) != MKBETAG('S', 'H', 'D', 'R'))
80  return AVERROR_INVALIDDATA;
81 
82  size = avio_rb32(pb);
83  if (size < 14)
84  return AVERROR_INVALIDDATA;
85 
86  smush->version = 1;
87  subversion = avio_rl16(pb);
88  nframes = avio_rl32(pb);
89  if (!nframes)
90  return AVERROR_INVALIDDATA;
91 
92  avio_skip(pb, 2); // skip pad
93  width = avio_rl16(pb);
94  height = avio_rl16(pb);
95  avio_skip(pb, 2); // skip pad
96  avio_skip(pb, size - 14);
97 
98  if (avio_rb32(pb) != MKBETAG('F', 'L', 'H', 'D'))
99  return AVERROR_INVALIDDATA;
100 
101  size = avio_rb32(pb);
102  while (!got_audio && ((read + 8) < size)) {
103  uint32_t sig, chunk_size;
104 
105  if (avio_feof(pb))
106  return AVERROR_EOF;
107 
108  sig = avio_rb32(pb);
109  chunk_size = avio_rb32(pb);
110  read += 8;
111  switch (sig) {
112  case MKBETAG('W', 'a', 'v', 'e'):
113  got_audio = 1;
114  sample_rate = avio_rl32(pb);
115  if (!sample_rate)
116  return AVERROR_INVALIDDATA;
117 
118  channels = avio_rl32(pb);
119  if (!channels)
120  return AVERROR_INVALIDDATA;
121 
122  avio_skip(pb, chunk_size - 8);
123  read += chunk_size;
124  break;
125  case MKBETAG('B', 'l', '1', '6'):
126  case MKBETAG('A', 'N', 'N', 'O'):
127  avio_skip(pb, chunk_size);
128  read += chunk_size;
129  break;
130  default:
131  return AVERROR_INVALIDDATA;
132  break;
133  }
134  }
135 
136  avio_skip(pb, size - read);
137  } else {
138  av_log(ctx, AV_LOG_ERROR, "Wrong magic\n");
139  return AVERROR_INVALIDDATA;
140  }
141 
142  vst = avformat_new_stream(ctx, 0);
143  if (!vst)
144  return AVERROR(ENOMEM);
145 
146  smush->video_stream_index = vst->index;
147 
148  avpriv_set_pts_info(vst, 64, 1, 15);
149 
150  vst->start_time = 0;
151  vst->duration =
152  vst->nb_frames = nframes;
153  vst->avg_frame_rate = av_inv_q(vst->time_base);
156  vst->codec->codec_tag = 0;
157  vst->codec->width = width;
158  vst->codec->height = height;
159 
160  if (!smush->version) {
161  if (ff_alloc_extradata(vst->codec, 1024 + 2))
162  return AVERROR(ENOMEM);
163 
164  AV_WL16(vst->codec->extradata, subversion);
165  for (i = 0; i < 256; i++)
166  AV_WL32(vst->codec->extradata + 2 + i * 4, palette[i]);
167  }
168 
169  if (got_audio) {
170  ast = avformat_new_stream(ctx, 0);
171  if (!ast)
172  return AVERROR(ENOMEM);
173 
174  smush->audio_stream_index = ast->index;
175 
176  ast->start_time = 0;
179  ast->codec->codec_tag = 0;
180  ast->codec->sample_rate = sample_rate;
181  ast->codec->channels = channels;
182 
183  avpriv_set_pts_info(ast, 64, 1, ast->codec->sample_rate);
184  }
185 
186  return 0;
187 }
188 
190 {
191  SMUSHContext *smush = ctx->priv_data;
192  AVIOContext *pb = ctx->pb;
193  int done = 0;
194  int ret;
195 
196  while (!done) {
197  uint32_t sig, size;
198 
199  if (avio_feof(pb))
200  return AVERROR_EOF;
201 
202  sig = avio_rb32(pb);
203  size = avio_rb32(pb);
204 
205  switch (sig) {
206  case MKBETAG('F', 'R', 'M', 'E'):
207  if (smush->version)
208  break;
209  if ((ret = av_get_packet(pb, pkt, size)) < 0)
210  return ret;
211 
212  pkt->stream_index = smush->video_stream_index;
213  done = 1;
214  break;
215  case MKBETAG('B', 'l', '1', '6'):
216  if ((ret = av_get_packet(pb, pkt, size)) < 0)
217  return ret;
218 
219  pkt->stream_index = smush->video_stream_index;
220  pkt->duration = 1;
221  done = 1;
222  break;
223  case MKBETAG('W', 'a', 'v', 'e'):
224  if (size < 13)
225  return AVERROR_INVALIDDATA;
226  if (av_get_packet(pb, pkt, size) < 13)
227  return AVERROR(EIO);
228 
229  pkt->stream_index = smush->audio_stream_index;
230  pkt->flags |= AV_PKT_FLAG_KEY;
231  pkt->duration = AV_RB32(pkt->data);
232  if (pkt->duration == 0xFFFFFFFFu)
233  pkt->duration = AV_RB32(pkt->data + 8);
234  done = 1;
235  break;
236  default:
237  avio_skip(pb, size);
238  break;
239  }
240  }
241 
242  return 0;
243 }
244 
246  .name = "smush",
247  .long_name = NULL_IF_CONFIG_SMALL("LucasArts Smush"),
248  .priv_data_size = sizeof(SMUSHContext),
252 };
Bytestream IO Context.
Definition: avio.h:111
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
Buffered I/O operations.
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:4071
static int smush_read_packet(AVFormatContext *ctx, AVPacket *pkt)
Definition: smush.c:189
int index
stream index in AVFormatContext
Definition: avformat.h:843
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:277
static AVPacket pkt
AVInputFormat ff_smush_demuxer
Definition: smush.c:245
Format I/O context.
Definition: avformat.h:1272
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:690
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:3737
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:87
uint8_t * data
Definition: avcodec.h:1423
#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:241
ptrdiff_t size
Definition: opengl_enc.c:101
int duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1441
#define av_log(a,...)
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1469
#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
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:925
int video_stream_index
Definition: smush.c:31
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1429
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
int version
Definition: smush.c:29
unsigned int avio_rb24(AVIOContext *s)
Definition: aviobuf.c:683
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
ret
Definition: avfilter.c:974
int width
picture width / height.
Definition: avcodec.h:1681
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:620
Stream structure.
Definition: avformat.h:842
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
sample_rate
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:1314
static int smush_read_header(AVFormatContext *ctx)
Definition: smush.c:46
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1534
int ff_alloc_extradata(AVCodecContext *avctx, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0...
Definition: utils.c:2921
BYTE int const BYTE int int int height
Definition: avisynth_c.h:676
This structure contains the data a format has to probe a file.
Definition: avformat.h:448
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
Definition: rational.h:133
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
int palette
Definition: v4l.c:60
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:643
Main libavformat public API header.
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base...
Definition: avformat.h:894
static int smush_read_probe(AVProbeData *p)
Definition: smush.c:34
#define AV_WL16(p, v)
Definition: intreadwrite.h:412
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:903
#define MKBETAG(a, b, c, d)
Definition: common.h:316
int audio_stream_index
Definition: smush.c:30
int channels
number of audio channels
Definition: avcodec.h:2263
void * priv_data
Format private data.
Definition: avformat.h:1300
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
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:884
#define MKTAG(a, b, c, d)
Definition: common.h:315
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
This structure stores compressed data.
Definition: avcodec.h:1400
#define AV_WL32(p, v)
Definition: intreadwrite.h:426
static int width