FFmpeg  4.4.6
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 
34 static int smush_read_probe(const AVProbeData *p)
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  int ret;
55 
56  magic = avio_rb32(pb);
57  avio_skip(pb, 4); // skip movie size
58 
59  if (magic == MKBETAG('A', 'N', 'I', 'M')) {
60  if (avio_rb32(pb) != MKBETAG('A', 'H', 'D', 'R'))
61  return AVERROR_INVALIDDATA;
62 
63  size = avio_rb32(pb);
64  if (size < 3 * 256 + 6)
65  return AVERROR_INVALIDDATA;
66 
67  smush->version = 0;
68  subversion = avio_rl16(pb);
69  nframes = avio_rl16(pb);
70  if (!nframes)
71  return AVERROR_INVALIDDATA;
72 
73  avio_skip(pb, 2); // skip pad
74 
75  for (i = 0; i < 256; i++)
76  palette[i] = avio_rb24(pb);
77 
78  avio_skip(pb, size - (3 * 256 + 6));
79  } else if (magic == MKBETAG('S', 'A', 'N', 'M')) {
80  if (avio_rb32(pb) != MKBETAG('S', 'H', 'D', 'R'))
81  return AVERROR_INVALIDDATA;
82 
83  size = avio_rb32(pb);
84  if (size < 14)
85  return AVERROR_INVALIDDATA;
86 
87  smush->version = 1;
88  subversion = avio_rl16(pb);
89  nframes = avio_rl32(pb);
90  if (!nframes)
91  return AVERROR_INVALIDDATA;
92 
93  avio_skip(pb, 2); // skip pad
94  width = avio_rl16(pb);
95  height = avio_rl16(pb);
96  avio_skip(pb, 2); // skip pad
97  avio_skip(pb, size - 14);
98 
99  if (avio_rb32(pb) != MKBETAG('F', 'L', 'H', 'D'))
100  return AVERROR_INVALIDDATA;
101 
102  size = avio_rb32(pb);
103  while (!got_audio && ((read + 8) < size)) {
104  uint32_t sig, chunk_size;
105 
106  if (avio_feof(pb))
107  return AVERROR_EOF;
108 
109  sig = avio_rb32(pb);
110  chunk_size = avio_rb32(pb);
111  read += 8;
112  switch (sig) {
113  case MKBETAG('W', 'a', 'v', 'e'):
114  got_audio = 1;
115  sample_rate = avio_rl32(pb);
116  if (!sample_rate)
117  return AVERROR_INVALIDDATA;
118 
119  channels = avio_rl32(pb);
120  if (!channels)
121  return AVERROR_INVALIDDATA;
122 
123  avio_skip(pb, chunk_size - 8);
124  read += chunk_size;
125  break;
126  case MKBETAG('B', 'l', '1', '6'):
127  case MKBETAG('A', 'N', 'N', 'O'):
128  avio_skip(pb, chunk_size);
129  read += chunk_size;
130  break;
131  default:
132  return AVERROR_INVALIDDATA;
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->codecpar->codec_tag = 0;
157  vst->codecpar->width = width;
158  vst->codecpar->height = height;
159 
160  if (!smush->version) {
161  if ((ret = ff_alloc_extradata(vst->codecpar, 1024 + 2)) < 0)
162  return ret;
163 
164  AV_WL16(vst->codecpar->extradata, subversion);
165  for (i = 0; i < 256; i++)
166  AV_WL32(vst->codecpar->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->codecpar->codec_tag = 0;
181  ast->codecpar->channels = channels;
182 
183  avpriv_set_pts_info(ast, 64, 1, ast->codecpar->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 
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 
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 
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 };
channels
Definition: aptx.h:33
Main libavformat public API header.
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:453
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:310
Buffered I/O operations.
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:364
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:734
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:337
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:750
unsigned int avio_rb24(AVIOContext *s)
Definition: aviobuf.c:774
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:781
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
#define AV_RB32
Definition: intreadwrite.h:130
#define AV_RL32
Definition: intreadwrite.h:146
#define MKTAG(a, b, c, d)
Definition: common.h:478
#define MKBETAG(a, b, c, d)
Definition: common.h:479
sample_rate
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:545
@ AV_CODEC_ID_SANM
Definition: codec_id.h:231
@ AV_CODEC_ID_ADPCM_VIMA
Definition: codec_id.h:383
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:410
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4509
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define AVERROR(e)
Definition: error.h:43
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
Definition: rational.h:159
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
int i
Definition: input.c:407
#define AV_WL32(p, v)
Definition: intreadwrite.h:426
#define AV_WL16(p, v)
Definition: intreadwrite.h:412
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:4945
int ff_alloc_extradata(AVCodecParameters *par, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0.
Definition: utils.c:3314
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
AVInputFormat ff_smush_demuxer
Definition: smush.c:245
static int smush_read_probe(const AVProbeData *p)
Definition: smush.c:34
static int smush_read_header(AVFormatContext *ctx)
Definition: smush.c:46
static int smush_read_packet(AVFormatContext *ctx, AVPacket *pkt)
Definition: smush.c:189
int channels
Audio only.
Definition: codec_par.h:166
int width
Video only.
Definition: codec_par.h:126
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:64
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:74
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
int sample_rate
Audio only.
Definition: codec_par.h:170
Format I/O context.
Definition: avformat.h:1232
AVIOContext * pb
I/O context.
Definition: avformat.h:1274
void * priv_data
Format private data.
Definition: avformat.h:1260
Bytestream IO Context.
Definition: avio.h:161
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:645
This structure stores compressed data.
Definition: packet.h:346
int stream_index
Definition: packet.h:371
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:375
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:387
uint8_t * data
Definition: packet.h:369
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
Stream structure.
Definition: avformat.h:873
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1038
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:924
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:922
int index
stream index in AVFormatContext
Definition: avformat.h:874
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base.
Definition: avformat.h:912
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:946
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
Definition: avformat.h:902
int version
Definition: smush.c:29
int video_stream_index
Definition: smush.c:31
int audio_stream_index
Definition: smush.c:30
#define av_log(a,...)
AVPacket * pkt
Definition: movenc.c:59
AVFormatContext * ctx
Definition: movenc.c:48
#define height
#define width
int size