FFmpeg: libavformat/smacker.c Source File

FFmpeg
smacker.c
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1 /*
2  * Smacker demuxer
3  * Copyright (c) 2006 Konstantin Shishkov
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 /*
23  * Based on http://wiki.multimedia.cx/index.php?title=Smacker
24  */
25 
26 #include <inttypes.h>
27 
28 #include "libavutil/bswap.h"
29 #include "libavutil/channel_layout.h"
30 #include "libavutil/intreadwrite.h"
31 #include "avformat.h"
32 #include "internal.h"
33 
34  #define SMACKER_PAL 0x01
35  #define SMACKER_FLAG_RING_FRAME 0x01
36 
37  enum SAudFlags {
38   SMK_AUD_PACKED = 0x80,
39   SMK_AUD_16BITS = 0x20,
40   SMK_AUD_STEREO = 0x10,
41   SMK_AUD_BINKAUD = 0x08,
42   SMK_AUD_USEDCT = 0x04
43 };
44 
45  typedef struct SmackerContext {
46  /* Smacker file header */
47   uint32_t magic;
48   uint32_t width, height;
49   uint32_t frames;
50   int pts_inc;
51   uint32_t flags;
52   uint32_t audio[7];
53   uint32_t treesize;
54   uint32_t mmap_size, mclr_size, full_size, type_size;
55   uint8_t aflags[7];
56   uint32_t rates[7];
57   uint32_t pad;
58  /* frame info */
59   uint32_t *frm_size;
60   uint8_t *frm_flags;
61  /* internal variables */
62   int cur_frame;
63   int is_ver4;
64   int64_t cur_pts;
65  /* current frame for demuxing */
66   uint8_t pal[768];
67   int indexes[7];
68   int videoindex;
69   uint8_t *bufs[7];
70   int buf_sizes[7];
71   int stream_id[7];
72   int curstream;
73   int64_t nextpos;
74   int64_t aud_pts[7];
75 } SmackerContext;
76 
77  typedef struct SmackerFrame {
78   int64_t pts;
79   int stream;
80 } SmackerFrame;
81 
82 /* palette used in Smacker */
83  static const uint8_t smk_pal[64] = {
84  0x00, 0x04, 0x08, 0x0C, 0x10, 0x14, 0x18, 0x1C,
85  0x20, 0x24, 0x28, 0x2C, 0x30, 0x34, 0x38, 0x3C,
86  0x41, 0x45, 0x49, 0x4D, 0x51, 0x55, 0x59, 0x5D,
87  0x61, 0x65, 0x69, 0x6D, 0x71, 0x75, 0x79, 0x7D,
88  0x82, 0x86, 0x8A, 0x8E, 0x92, 0x96, 0x9A, 0x9E,
89  0xA2, 0xA6, 0xAA, 0xAE, 0xB2, 0xB6, 0xBA, 0xBE,
90  0xC3, 0xC7, 0xCB, 0xCF, 0xD3, 0xD7, 0xDB, 0xDF,
91  0xE3, 0xE7, 0xEB, 0xEF, 0xF3, 0xF7, 0xFB, 0xFF
92 };
93 
94 
95  static int smacker_probe(AVProbeData *p)
96 {
97  if ( AV_RL32(p->buf) != MKTAG('S', 'M', 'K', '2')
98  && AV_RL32(p->buf) != MKTAG('S', 'M', 'K', '4'))
99  return 0;
100 
101  if (AV_RL32(p->buf+4) > 32768U || AV_RL32(p->buf+8) > 32768U)
102  return AVPROBE_SCORE_MAX/4;
103 
104  return AVPROBE_SCORE_MAX;
105 }
106 
107  static int smacker_read_header(AVFormatContext *s)
108 {
109  AVIOContext *pb = s->pb;
110  SmackerContext *smk = s->priv_data;
111  AVStream *st, *ast[7];
112  int i, ret;
113  int tbase;
114 
115  /* read and check header */
116  smk->magic = avio_rl32(pb);
117  if (smk->magic != MKTAG('S', 'M', 'K', '2') && smk->magic != MKTAG('S', 'M', 'K', '4'))
118  return AVERROR_INVALIDDATA;
119  smk->width = avio_rl32(pb);
120  smk->height = avio_rl32(pb);
121  smk->frames = avio_rl32(pb);
122  smk->pts_inc = (int32_t)avio_rl32(pb);
123  if (smk->pts_inc > INT_MAX / 100) {
124  av_log(s, AV_LOG_ERROR, "pts_inc %d is too large\n", smk->pts_inc);
125  return AVERROR_INVALIDDATA;
126  }
127 
128  smk->flags = avio_rl32(pb);
129  if(smk->flags & SMACKER_FLAG_RING_FRAME)
130  smk->frames++;
131  for(i = 0; i < 7; i++)
132  smk->audio[i] = avio_rl32(pb);
133  smk->treesize = avio_rl32(pb);
134 
135  if(smk->treesize >= UINT_MAX/4){ // smk->treesize + 16 must not overflow (this check is probably redundant)
136  av_log(s, AV_LOG_ERROR, "treesize too large\n");
137  return AVERROR_INVALIDDATA;
138  }
139 
140 //FIXME remove extradata "rebuilding"
141  smk->mmap_size = avio_rl32(pb);
142  smk->mclr_size = avio_rl32(pb);
143  smk->full_size = avio_rl32(pb);
144  smk->type_size = avio_rl32(pb);
145  for(i = 0; i < 7; i++) {
146  smk->rates[i] = avio_rl24(pb);
147  smk->aflags[i] = avio_r8(pb);
148  }
149  smk->pad = avio_rl32(pb);
150  /* setup data */
151  if(smk->frames > 0xFFFFFF) {
152  av_log(s, AV_LOG_ERROR, "Too many frames: %"PRIu32"\n", smk->frames);
153  return AVERROR_INVALIDDATA;
154  }
155  smk->frm_size = av_malloc_array(smk->frames, sizeof(*smk->frm_size));
156  smk->frm_flags = av_malloc(smk->frames);
157  if (!smk->frm_size || !smk->frm_flags) {
158  av_freep(&smk->frm_size);
159  av_freep(&smk->frm_flags);
160  return AVERROR(ENOMEM);
161  }
162 
163  smk->is_ver4 = (smk->magic != MKTAG('S', 'M', 'K', '2'));
164 
165  /* read frame info */
166  for(i = 0; i < smk->frames; i++) {
167  smk->frm_size[i] = avio_rl32(pb);
168  }
169  for(i = 0; i < smk->frames; i++) {
170  smk->frm_flags[i] = avio_r8(pb);
171  }
172 
173  /* init video codec */
174  st = avformat_new_stream(s, NULL);
175  if (!st)
176  return AVERROR(ENOMEM);
177  smk->videoindex = st->index;
178  st->codec->width = smk->width;
179  st->codec->height = smk->height;
180  st->codec->pix_fmt = AV_PIX_FMT_PAL8;
181  st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
182  st->codec->codec_id = AV_CODEC_ID_SMACKVIDEO;
183  st->codec->codec_tag = smk->magic;
184  /* Smacker uses 100000 as internal timebase */
185  if(smk->pts_inc < 0)
186  smk->pts_inc = -smk->pts_inc;
187  else
188  smk->pts_inc *= 100;
189  tbase = 100000;
190  av_reduce(&tbase, &smk->pts_inc, tbase, smk->pts_inc, (1UL<<31)-1);
191  avpriv_set_pts_info(st, 33, smk->pts_inc, tbase);
192  st->duration = smk->frames;
193  /* handle possible audio streams */
194  for(i = 0; i < 7; i++) {
195  smk->indexes[i] = -1;
196  if (smk->rates[i]) {
197  ast[i] = avformat_new_stream(s, NULL);
198  if (!ast[i])
199  return AVERROR(ENOMEM);
200  smk->indexes[i] = ast[i]->index;
201  ast[i]->codec->codec_type = AVMEDIA_TYPE_AUDIO;
202  if (smk->aflags[i] & SMK_AUD_BINKAUD) {
203  ast[i]->codec->codec_id = AV_CODEC_ID_BINKAUDIO_RDFT;
204  } else if (smk->aflags[i] & SMK_AUD_USEDCT) {
205  ast[i]->codec->codec_id = AV_CODEC_ID_BINKAUDIO_DCT;
206  } else if (smk->aflags[i] & SMK_AUD_PACKED){
207  ast[i]->codec->codec_id = AV_CODEC_ID_SMACKAUDIO;
208  ast[i]->codec->codec_tag = MKTAG('S', 'M', 'K', 'A');
209  } else {
210  ast[i]->codec->codec_id = AV_CODEC_ID_PCM_U8;
211  }
212  if (smk->aflags[i] & SMK_AUD_STEREO) {
213  ast[i]->codec->channels = 2;
214  ast[i]->codec->channel_layout = AV_CH_LAYOUT_STEREO;
215  } else {
216  ast[i]->codec->channels = 1;
217  ast[i]->codec->channel_layout = AV_CH_LAYOUT_MONO;
218  }
219  ast[i]->codec->sample_rate = smk->rates[i];
220  ast[i]->codec->bits_per_coded_sample = (smk->aflags[i] & SMK_AUD_16BITS) ? 16 : 8;
221  if(ast[i]->codec->bits_per_coded_sample == 16 && ast[i]->codec->codec_id == AV_CODEC_ID_PCM_U8)
222  ast[i]->codec->codec_id = AV_CODEC_ID_PCM_S16LE;
223  avpriv_set_pts_info(ast[i], 64, 1, ast[i]->codec->sample_rate
224  * ast[i]->codec->channels * ast[i]->codec->bits_per_coded_sample / 8);
225  }
226  }
227 
228 
229  /* load trees to extradata, they will be unpacked by decoder */
230  if(ff_alloc_extradata(st->codec, smk->treesize + 16)){
231  av_log(s, AV_LOG_ERROR,
232  "Cannot allocate %"PRIu32" bytes of extradata\n",
233  smk->treesize + 16);
234  av_freep(&smk->frm_size);
235  av_freep(&smk->frm_flags);
236  return AVERROR(ENOMEM);
237  }
238  ret = avio_read(pb, st->codec->extradata + 16, st->codec->extradata_size - 16);
239  if(ret != st->codec->extradata_size - 16){
240  av_freep(&smk->frm_size);
241  av_freep(&smk->frm_flags);
242  return AVERROR(EIO);
243  }
244  ((int32_t*)st->codec->extradata)[0] = av_le2ne32(smk->mmap_size);
245  ((int32_t*)st->codec->extradata)[1] = av_le2ne32(smk->mclr_size);
246  ((int32_t*)st->codec->extradata)[2] = av_le2ne32(smk->full_size);
247  ((int32_t*)st->codec->extradata)[3] = av_le2ne32(smk->type_size);
248 
249  smk->curstream = -1;
250  smk->nextpos = avio_tell(pb);
251 
252  return 0;
253 }
254 
255 
256  static int smacker_read_packet(AVFormatContext *s, AVPacket *pkt)
257 {
258  SmackerContext *smk = s->priv_data;
259  int flags;
260  int ret;
261  int i;
262  int frame_size = 0;
263  int palchange = 0;
264 
265  if (avio_feof(s->pb) || smk->cur_frame >= smk->frames)
266  return AVERROR_EOF;
267 
268  /* if we demuxed all streams, pass another frame */
269  if(smk->curstream < 0) {
270  avio_seek(s->pb, smk->nextpos, 0);
271  frame_size = smk->frm_size[smk->cur_frame] & (~3);
272  flags = smk->frm_flags[smk->cur_frame];
273  /* handle palette change event */
274  if(flags & SMACKER_PAL){
275  int size, sz, t, off, j, pos;
276  uint8_t *pal = smk->pal;
277  uint8_t oldpal[768];
278 
279  memcpy(oldpal, pal, 768);
280  size = avio_r8(s->pb);
281  size = size * 4 - 1;
282  if(size + 1 > frame_size)
283  return AVERROR_INVALIDDATA;
284  frame_size -= size;
285  frame_size--;
286  sz = 0;
287  pos = avio_tell(s->pb) + size;
288  while(sz < 256){
289  t = avio_r8(s->pb);
290  if(t & 0x80){ /* skip palette entries */
291  sz += (t & 0x7F) + 1;
292  pal += ((t & 0x7F) + 1) * 3;
293  } else if(t & 0x40){ /* copy with offset */
294  off = avio_r8(s->pb);
295  j = (t & 0x3F) + 1;
296  if (off + j > 0x100) {
297  av_log(s, AV_LOG_ERROR,
298  "Invalid palette update, offset=%d length=%d extends beyond palette size\n",
299  off, j);
300  return AVERROR_INVALIDDATA;
301  }
302  off *= 3;
303  while(j-- && sz < 256) {
304  *pal++ = oldpal[off + 0];
305  *pal++ = oldpal[off + 1];
306  *pal++ = oldpal[off + 2];
307  sz++;
308  off += 3;
309  }
310  } else { /* new entries */
311  *pal++ = smk_pal[t];
312  *pal++ = smk_pal[avio_r8(s->pb) & 0x3F];
313  *pal++ = smk_pal[avio_r8(s->pb) & 0x3F];
314  sz++;
315  }
316  }
317  avio_seek(s->pb, pos, 0);
318  palchange |= 1;
319  }
320  flags >>= 1;
321  smk->curstream = -1;
322  /* if audio chunks are present, put them to stack and retrieve later */
323  for(i = 0; i < 7; i++) {
324  if(flags & 1) {
325  uint32_t size;
326  int err;
327 
328  size = avio_rl32(s->pb) - 4;
329  if (!size || size + 4LL > frame_size) {
330  av_log(s, AV_LOG_ERROR, "Invalid audio part size\n");
331  return AVERROR_INVALIDDATA;
332  }
333  frame_size -= size;
334  frame_size -= 4;
335  smk->curstream++;
336  if ((err = av_reallocp(&smk->bufs[smk->curstream], size)) < 0) {
337  smk->buf_sizes[smk->curstream] = 0;
338  return err;
339  }
340  smk->buf_sizes[smk->curstream] = size;
341  ret = avio_read(s->pb, smk->bufs[smk->curstream], size);
342  if(ret != size)
343  return AVERROR(EIO);
344  smk->stream_id[smk->curstream] = smk->indexes[i];
345  }
346  flags >>= 1;
347  }
348  if (frame_size < 0 || frame_size >= INT_MAX/2)
349  return AVERROR_INVALIDDATA;
350  if (av_new_packet(pkt, frame_size + 769))
351  return AVERROR(ENOMEM);
352  if(smk->frm_size[smk->cur_frame] & 1)
353  palchange |= 2;
354  pkt->data[0] = palchange;
355  memcpy(pkt->data + 1, smk->pal, 768);
356  ret = avio_read(s->pb, pkt->data + 769, frame_size);
357  if(ret != frame_size)
358  return AVERROR(EIO);
359  pkt->stream_index = smk->videoindex;
360  pkt->pts = smk->cur_frame;
361  pkt->size = ret + 769;
362  smk->cur_frame++;
363  smk->nextpos = avio_tell(s->pb);
364  } else {
365  if (smk->stream_id[smk->curstream] < 0 || !smk->bufs[smk->curstream])
366  return AVERROR_INVALIDDATA;
367  if (av_new_packet(pkt, smk->buf_sizes[smk->curstream]))
368  return AVERROR(ENOMEM);
369  memcpy(pkt->data, smk->bufs[smk->curstream], smk->buf_sizes[smk->curstream]);
370  pkt->size = smk->buf_sizes[smk->curstream];
371  pkt->stream_index = smk->stream_id[smk->curstream];
372  pkt->pts = smk->aud_pts[smk->curstream];
373  smk->aud_pts[smk->curstream] += AV_RL32(pkt->data);
374  smk->curstream--;
375  }
376 
377  return 0;
378 }
379 
380  static int smacker_read_close(AVFormatContext *s)
381 {
382  SmackerContext *smk = s->priv_data;
383  int i;
384 
385  for(i = 0; i < 7; i++)
386  av_freep(&smk->bufs[i]);
387  av_freep(&smk->frm_size);
388  av_freep(&smk->frm_flags);
389 
390  return 0;
391 }
392 
393  AVInputFormat ff_smacker_demuxer = {
394  .name = "smk",
395  .long_name = NULL_IF_CONFIG_SMALL("Smacker"),
396  .priv_data_size = sizeof(SmackerContext),
397  .read_probe = smacker_probe,
398  .read_header = smacker_read_header,
399  .read_packet = smacker_read_packet,
400  .read_close = smacker_read_close,
401 };
NULL
#define NULL
Definition: coverity.c:32
SAudFlags
SAudFlags
Definition: smacker.c:37
s
const char * s
Definition: avisynth_c.h:631
AVIOContext
Bytestream IO Context.
Definition: avio.h:111
SmackerFrame::pts
int64_t pts
Definition: smacker.c:78
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
avpriv_set_pts_info
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:4149
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Definition: avcodec.h:190
SmackerContext::frm_size
uint32_t * frm_size
Definition: smacker.c:59
SmackerContext::type_size
uint32_t type_size
Definition: smacker.c:54
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int index
stream index in AVFormatContext
Definition: avformat.h:878
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int size
Definition: avcodec.h:1468
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int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:208
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enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1752
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static AVPacket pkt
Definition: demuxing_decoding.c:54
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int64_t aud_pts[7]
Definition: smacker.c:74
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#define AV_CH_LAYOUT_STEREO
Definition: channel_layout.h:86
av_le2ne32
#define av_le2ne32(x)
Definition: bswap.h:96
SmackerContext::audio
uint32_t audio[7]
Definition: smacker.c:52
AVFormatContext
Format I/O context.
Definition: avformat.h:1314
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static int smacker_probe(AVProbeData *p)
Definition: smacker.c:95
uint8_t
uint8_t
Definition: audio_convert.c:194
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#define av_malloc(s)
Definition: tableprint_vlc.h:31
AV_PIX_FMT_PAL8
8 bit with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:74
SmackerFrame::stream
int stream
Definition: smacker.c:79
SmackerContext::pal
uint8_t pal[768]
Definition: smacker.c:66
AVCodecContext::extradata
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1647
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AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:3805
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int64_t nextpos
Definition: smacker.c:73
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uint8_t * data
Definition: avcodec.h:1467
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Definition: smacker.c:57
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:55
read_close
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
size
ptrdiff_t size
Definition: opengl_enc.c:101
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static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:442
AVCodecContext::bits_per_coded_sample
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:2917
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
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int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:545
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uint32_t mclr_size
Definition: smacker.c:54
SmackerContext::full_size
uint32_t full_size
Definition: smacker.c:54
SmackerContext::videoindex
int videoindex
Definition: smacker.c:68
U
#define U(x)
Definition: vp56_arith.h:37
av_new_packet
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:86
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
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int buf_sizes[7]
Definition: smacker.c:70
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uint8_t aflags[7]
Definition: smacker.c:55
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unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:667
AVERROR
#define AVERROR(e)
Definition: error.h:43
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uint32_t flags
Definition: smacker.c:51
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#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
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uint8_t * frm_flags
Definition: smacker.c:60
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Definition: avutil.h:194
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Definition: avcodec.h:470
SMACKER_FLAG_RING_FRAME
#define SMACKER_FLAG_RING_FRAME
Definition: smacker.c:35
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uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:2338
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static const uint8_t smk_pal[64]
Definition: smacker.c:83
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int avio_r8(AVIOContext *s)
Definition: aviobuf.c:536
AVStream::codec
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Codec context associated with this stream.
Definition: avformat.h:896
av_reduce
int av_reduce(int *dst_num, int *dst_den, int64_t num, int64_t den, int64_t max)
Reduce a fraction.
Definition: rational.c:35
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:462
SmackerContext::pts_inc
int pts_inc
Definition: smacker.c:50
channel_layout.h
audio channel layout utility functions
smacker_read_packet
static int smacker_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: smacker.c:256
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Definition: jvdec.c:55
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picture width / height.
Definition: avcodec.h:1711
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Definition: audio_convert.c:194
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Definition: smacker.c:72
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int height
Definition: avcodec.h:1711
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:638
SmackerContext::cur_pts
int64_t cur_pts
Definition: smacker.c:64
smacker_read_close
static int smacker_read_close(AVFormatContext *s)
Definition: smacker.c:380
AVStream
Stream structure.
Definition: avformat.h:877
AV_CODEC_ID_BINKAUDIO_RDFT
Definition: avcodec.h:469
AV_CODEC_ID_PCM_U8
Definition: avcodec.h:327
read_packet
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
SMACKER_PAL
#define SMACKER_PAL
Definition: smacker.c:34
SmackerContext::rates
uint32_t rates[7]
Definition: smacker.c:56
frame_size
int frame_size
Definition: mxfenc.c:1821
AVCodecContext::codec_type
enum AVMediaType codec_type
Definition: avcodec.h:1540
SmackerContext::width
uint32_t width
Definition: smacker.c:48
AVCodecContext::codec_id
enum AVCodecID codec_id
Definition: avcodec.h:1549
AVCodecContext::sample_rate
int sample_rate
samples per second
Definition: avcodec.h:2287
AVFormatContext::pb
AVIOContext * pb
I/O context.
Definition: avformat.h:1356
AVCodecContext::codec_tag
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1564
ff_alloc_extradata
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:2979
AVCodecContext::extradata_size
int extradata_size
Definition: avcodec.h:1648
smacker_read_header
static int smacker_read_header(AVFormatContext *s)
Definition: smacker.c:107
SmackerContext::cur_frame
int cur_frame
Definition: smacker.c:62
bswap.h
byte swapping routines
SmackerContext::is_ver4
int is_ver4
Definition: smacker.c:63
SmackerContext::treesize
uint32_t treesize
Definition: smacker.c:53
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:460
flags
static int flags
Definition: cpu.c:47
ff_smacker_demuxer
AVInputFormat ff_smacker_demuxer
Definition: smacker.c:393
SmackerContext::stream_id
int stream_id[7]
Definition: smacker.c:71
SmackerContext::bufs
uint8_t * bufs[7]
Definition: smacker.c:69
AVStream::duration
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:936
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:472
SmackerContext::indexes
int indexes[7]
Definition: smacker.c:67
avformat.h
Main libavformat public API header.
av_reallocp
int av_reallocp(void *ptr, size_t size)
Allocate or reallocate a block of memory.
Definition: mem.c:187
SmackerContext::frames
uint32_t frames
Definition: smacker.c:49
AV_CODEC_ID_PCM_S16LE
Definition: avcodec.h:322
SmackerContext::mmap_size
uint32_t mmap_size
Definition: smacker.c:54
SmackerContext::height
uint32_t height
Definition: smacker.c:48
AVCodecContext::channels
int channels
number of audio channels
Definition: avcodec.h:2288
AVFormatContext::priv_data
void * priv_data
Format private data.
Definition: avformat.h:1342
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:661
AVMEDIA_TYPE_VIDEO
Definition: avutil.h:193
av_malloc_array
#define av_malloc_array(a, b)
Definition: tableprint_vlc.h:32
avio_feof
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:306
avio_rl24
unsigned int avio_rl24(AVIOContext *s)
Definition: aviobuf.c:659
AVPacket::stream_index
int stream_index
Definition: avcodec.h:1469
AV_CH_LAYOUT_MONO
#define AV_CH_LAYOUT_MONO
Definition: channel_layout.h:85
MKTAG
#define MKTAG(a, b, c, d)
Definition: common.h:342
AV_RL32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
AVPacket
This structure stores compressed data.
Definition: avcodec.h:1444
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1460
AV_CODEC_ID_SMACKAUDIO
Definition: avcodec.h:442
SmackerContext::magic
uint32_t magic
Definition: smacker.c:47
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