FFmpeg
wc3movie.c
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1 /*
2  * Wing Commander III Movie (.mve) File Demuxer
3  * Copyright (c) 2003 The FFmpeg project
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  * @file
24  * Wing Commander III Movie file demuxer
25  * by Mike Melanson (melanson@pcisys.net)
26  * for more information on the WC3 .mve file format, visit:
27  * http://www.pcisys.net/~melanson/codecs/
28  */
29 
30 #include "libavutil/avstring.h"
31 #include "libavutil/channel_layout.h"
32 #include "libavutil/intreadwrite.h"
33 #include "libavutil/dict.h"
34 #include "libavutil/mem.h"
35 #include "avformat.h"
36 #include "avio_internal.h"
37 #include "demux.h"
38 #include "internal.h"
39 
40 #define FORM_TAG MKTAG('F', 'O', 'R', 'M')
41 #define MOVE_TAG MKTAG('M', 'O', 'V', 'E')
42 #define PC__TAG MKTAG('_', 'P', 'C', '_')
43 #define SOND_TAG MKTAG('S', 'O', 'N', 'D')
44 #define BNAM_TAG MKTAG('B', 'N', 'A', 'M')
45 #define SIZE_TAG MKTAG('S', 'I', 'Z', 'E')
46 #define PALT_TAG MKTAG('P', 'A', 'L', 'T')
47 #define INDX_TAG MKTAG('I', 'N', 'D', 'X')
48 #define BRCH_TAG MKTAG('B', 'R', 'C', 'H')
49 #define SHOT_TAG MKTAG('S', 'H', 'O', 'T')
50 #define VGA__TAG MKTAG('V', 'G', 'A', ' ')
51 #define TEXT_TAG MKTAG('T', 'E', 'X', 'T')
52 #define AUDI_TAG MKTAG('A', 'U', 'D', 'I')
53 
54 /* video resolution unless otherwise specified */
55 #define WC3_DEFAULT_WIDTH 320
56 #define WC3_DEFAULT_HEIGHT 165
57 
58 /* always use the same PCM audio parameters */
59 #define WC3_SAMPLE_RATE 22050
60 #define WC3_AUDIO_BITS 16
61 
62 /* nice, constant framerate */
63 #define WC3_FRAME_FPS 15
64 
65 #define PALETTE_SIZE (256 * 3)
66 
67 typedef struct Wc3DemuxContext {
68  int width;
69  int height;
70  int64_t pts;
71  int video_stream_index;
72  int audio_stream_index;
73 
74  AVPacket *vpkt;
75 
76 } Wc3DemuxContext;
77 
78 static int wc3_read_close(AVFormatContext *s)
79 {
80  Wc3DemuxContext *wc3 = s->priv_data;
81 
82  av_packet_free(&wc3->vpkt);
83 
84  return 0;
85 }
86 
87 static int wc3_probe(const AVProbeData *p)
88 {
89  if (p->buf_size < 12)
90  return 0;
91 
92  if ((AV_RL32(&p->buf[0]) != FORM_TAG) ||
93  (AV_RL32(&p->buf[8]) != MOVE_TAG))
94  return 0;
95 
96  return AVPROBE_SCORE_MAX;
97 }
98 
99 static int wc3_read_header(AVFormatContext *s)
100 {
101  Wc3DemuxContext *wc3 = s->priv_data;
102  AVIOContext *pb = s->pb;
103  unsigned int fourcc_tag;
104  unsigned int size;
105  AVStream *st;
106  int ret = 0;
107  char *buffer;
108 
109  /* default context members */
110  wc3->width = WC3_DEFAULT_WIDTH;
111  wc3->height = WC3_DEFAULT_HEIGHT;
112  wc3->pts = 0;
113  wc3->video_stream_index = wc3->audio_stream_index = 0;
114  wc3->vpkt = av_packet_alloc();
115  if (!wc3->vpkt)
116  return AVERROR(ENOMEM);
117 
118  /* skip the first 3 32-bit numbers */
119  avio_skip(pb, 12);
120 
121  /* traverse through the chunks and load the header information before
122  * the first BRCH tag */
123  fourcc_tag = avio_rl32(pb);
124  size = (avio_rb32(pb) + 1) & (~1);
125 
126  do {
127  switch (fourcc_tag) {
128 
129  case SOND_TAG:
130  case INDX_TAG:
131  /* SOND unknown, INDX unnecessary; ignore both */
132  avio_skip(pb, size);
133  break;
134 
135  case PC__TAG:
136  /* number of palettes, unneeded */
137  avio_skip(pb, 12);
138  break;
139 
140  case BNAM_TAG:
141  /* load up the name */
142  buffer = av_malloc(size+1);
143  if (!buffer)
144  return AVERROR(ENOMEM);
145  if ((ret = ffio_read_size(pb, buffer, size)) < 0) {
146  av_freep(&buffer);
147  return ret;
148  }
149  buffer[size] = 0;
150  av_dict_set(&s->metadata, "title", buffer,
151  AV_DICT_DONT_STRDUP_VAL);
152  break;
153 
154  case SIZE_TAG:
155  /* video resolution override */
156  wc3->width = avio_rl32(pb);
157  wc3->height = avio_rl32(pb);
158  break;
159 
160  case PALT_TAG:
161  /* one of several palettes */
162  avio_seek(pb, -8, SEEK_CUR);
163  av_append_packet(pb, wc3->vpkt, 8 + PALETTE_SIZE);
164  break;
165 
166  default:
167  av_log(s, AV_LOG_ERROR, "unrecognized WC3 chunk: %s\n",
168  av_fourcc2str(fourcc_tag));
169  return AVERROR_INVALIDDATA;
170  }
171 
172  fourcc_tag = avio_rl32(pb);
173  /* chunk sizes are 16-bit aligned */
174  size = (avio_rb32(pb) + 1) & (~1);
175  if (avio_feof(pb))
176  return AVERROR_INVALIDDATA;
177 
178  } while (fourcc_tag != BRCH_TAG);
179 
180  /* initialize the decoder streams */
181  st = avformat_new_stream(s, NULL);
182  if (!st)
183  return AVERROR(ENOMEM);
184  avpriv_set_pts_info(st, 33, 1, WC3_FRAME_FPS);
185  wc3->video_stream_index = st->index;
186  st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
187  st->codecpar->codec_id = AV_CODEC_ID_XAN_WC3;
188  st->codecpar->codec_tag = 0; /* no fourcc */
189  st->codecpar->width = wc3->width;
190  st->codecpar->height = wc3->height;
191 
192  st = avformat_new_stream(s, NULL);
193  if (!st)
194  return AVERROR(ENOMEM);
195  avpriv_set_pts_info(st, 33, 1, WC3_FRAME_FPS);
196  wc3->audio_stream_index = st->index;
197  st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
198  st->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE;
199  st->codecpar->codec_tag = 1;
200  st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
201  st->codecpar->bits_per_coded_sample = WC3_AUDIO_BITS;
202  st->codecpar->sample_rate = WC3_SAMPLE_RATE;
203  st->codecpar->bit_rate = st->codecpar->ch_layout.nb_channels * st->codecpar->sample_rate *
204  st->codecpar->bits_per_coded_sample;
205  st->codecpar->block_align = WC3_AUDIO_BITS * st->codecpar->ch_layout.nb_channels;
206 
207  return 0;
208 }
209 
210 static int wc3_read_packet(AVFormatContext *s,
211  AVPacket *pkt)
212 {
213  Wc3DemuxContext *wc3 = s->priv_data;
214  AVIOContext *pb = s->pb;
215  unsigned int fourcc_tag;
216  unsigned int size;
217  int packet_read = 0;
218  int ret = 0;
219  unsigned char text[1024];
220 
221  while (!packet_read) {
222 
223  fourcc_tag = avio_rl32(pb);
224  /* chunk sizes are 16-bit aligned */
225  size = (avio_rb32(pb) + 1) & (~1);
226  if (avio_feof(pb))
227  return AVERROR_INVALIDDATA;
228 
229  switch (fourcc_tag) {
230 
231  case BRCH_TAG:
232  /* no-op */
233  break;
234 
235  case SHOT_TAG:
236  /* load up new palette */
237  avio_seek(pb, -8, SEEK_CUR);
238  av_append_packet(pb, wc3->vpkt, 8 + 4);
239  break;
240 
241  case VGA__TAG:
242  /* send out video chunk */
243  avio_seek(pb, -8, SEEK_CUR);
244  ret= av_append_packet(pb, wc3->vpkt, 8 + size);
245  // ignore error if we have some data
246  if (wc3->vpkt->size > 0)
247  ret = 0;
248  av_packet_move_ref(pkt, wc3->vpkt);
249  pkt->stream_index = wc3->video_stream_index;
250  pkt->pts = wc3->pts;
251  packet_read = 1;
252  break;
253 
254  case TEXT_TAG:
255  /* subtitle chunk */
256  if ((unsigned)size > sizeof(text))
257  ret = AVERROR_INVALIDDATA;
258  else if ((ret = ffio_read_size(pb, text, size)) == size) {
259  int i = 0;
260  av_log (s, AV_LOG_DEBUG, "Subtitle time!\n");
261  if (i >= size || av_strnlen(&text[i + 1], size - i - 1) >= size - i - 1)
262  return AVERROR_INVALIDDATA;
263  av_log (s, AV_LOG_DEBUG, " inglish: %s\n", &text[i + 1]);
264  i += text[i] + 1;
265  if (i >= size || av_strnlen(&text[i + 1], size - i - 1) >= size - i - 1)
266  return AVERROR_INVALIDDATA;
267  av_log (s, AV_LOG_DEBUG, " doytsch: %s\n", &text[i + 1]);
268  i += text[i] + 1;
269  if (i >= size || av_strnlen(&text[i + 1], size - i - 1) >= size - i - 1)
270  return AVERROR_INVALIDDATA;
271  av_log (s, AV_LOG_DEBUG, " fronsay: %s\n", &text[i + 1]);
272  }
273  break;
274 
275  case AUDI_TAG:
276  /* send out audio chunk */
277  ret= av_get_packet(pb, pkt, size);
278  pkt->stream_index = wc3->audio_stream_index;
279  pkt->pts = wc3->pts;
280 
281  /* time to advance pts */
282  wc3->pts++;
283 
284  packet_read = 1;
285  break;
286 
287  default:
288  av_log(s, AV_LOG_ERROR, "unrecognized WC3 chunk: %s\n",
289  av_fourcc2str(fourcc_tag));
290  ret = AVERROR_INVALIDDATA;
291  packet_read = 1;
292  break;
293  }
294  }
295 
296  return ret;
297 }
298 
299 const FFInputFormat ff_wc3_demuxer = {
300  .p.name = "wc3movie",
301  .p.long_name = NULL_IF_CONFIG_SMALL("Wing Commander III movie"),
302  .priv_data_size = sizeof(Wc3DemuxContext),
303  .flags_internal = FF_INFMT_FLAG_INIT_CLEANUP,
304  .read_probe = wc3_probe,
305  .read_header = wc3_read_header,
306  .read_packet = wc3_read_packet,
307  .read_close = wc3_read_close,
308 };
Wc3DemuxContext::audio_stream_index
int audio_stream_index
Definition: wc3movie.c:72
AV_CODEC_ID_PCM_S16LE
@ AV_CODEC_ID_PCM_S16LE
Definition: codec_id.h:337
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:51
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const struct AVCodec *c)
Add a new stream to a media file.
int64_t
long long int64_t
Definition: coverity.c:34
ff_wc3_demuxer
const FFInputFormat ff_wc3_demuxer
Definition: wc3movie.c:299
AVCodecParameters::codec_tag
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:59
FORM_TAG
#define FORM_TAG
Definition: wc3movie.c:40
AVChannelLayout::nb_channels
int nb_channels
Number of channels in this layout.
Definition: channel_layout.h:329
av_packet_free
void av_packet_free(AVPacket **pkt)
Free the packet, if the packet is reference counted, it will be unreferenced first.
Definition: packet.c:74
PC__TAG
#define PC__TAG
Definition: wc3movie.c:42
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:31
Wc3DemuxContext::pts
int64_t pts
Definition: wc3movie.c:70
Wc3DemuxContext
Definition: wc3movie.c:67
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:463
avpriv_set_pts_info
void avpriv_set_pts_info(AVStream *st, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: avformat.c:777
WC3_SAMPLE_RATE
#define WC3_SAMPLE_RATE
Definition: wc3movie.c:59
AUDI_TAG
#define AUDI_TAG
Definition: wc3movie.c:52
wc3_read_header
static int wc3_read_header(AVFormatContext *s)
Definition: wc3movie.c:99
read_close
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:143
AV_DICT_DONT_STRDUP_VAL
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that's been allocated with av_malloc() or another memory allocation functio...
Definition: dict.h:79
avio_rb32
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:764
pkt
AVPacket * pkt
Definition: movenc.c:60
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:210
read_packet
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_read_callback.c:42
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:198
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:549
TEXT_TAG
#define TEXT_TAG
Definition: wc3movie.c:51
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:201
AVCodecParameters::width
int width
Video only.
Definition: codec_par.h:134
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:231
FF_INFMT_FLAG_INIT_CLEANUP
#define FF_INFMT_FLAG_INIT_CLEANUP
For an FFInputFormat with this flag set read_close() needs to be called by the caller upon read_heade...
Definition: demux.h:35
AVFormatContext
Format I/O context.
Definition: avformat.h:1264
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:767
SOND_TAG
#define SOND_TAG
Definition: wc3movie.c:43
NULL
#define NULL
Definition: coverity.c:32
av_strnlen
size_t static size_t av_strnlen(const char *s, size_t len)
Get the count of continuous non zero chars starting from the beginning.
Definition: avstring.h:141
VGA__TAG
#define VGA__TAG
Definition: wc3movie.c:50
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:451
MOVE_TAG
#define MOVE_TAG
Definition: wc3movie.c:41
AVCodecParameters::ch_layout
AVChannelLayout ch_layout
Audio only.
Definition: codec_par.h:180
av_packet_move_ref
void av_packet_move_ref(AVPacket *dst, AVPacket *src)
Move every field in src to dst and reset src.
Definition: packet.c:489
WC3_DEFAULT_HEIGHT
#define WC3_DEFAULT_HEIGHT
Definition: wc3movie.c:56
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: codec_par.h:184
BRCH_TAG
#define BRCH_TAG
Definition: wc3movie.c:48
SHOT_TAG
#define SHOT_TAG
Definition: wc3movie.c:49
BNAM_TAG
#define BNAM_TAG
Definition: wc3movie.c:44
avio_rl32
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:733
Wc3DemuxContext::vpkt
AVPacket * vpkt
Definition: wc3movie.c:74
AVIOContext
Bytestream IO Context.
Definition: avio.h:160
AVPacket::size
int size
Definition: packet.h:589
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:94
AVChannelLayout
An AVChannelLayout holds information about the channel layout of audio data.
Definition: channel_layout.h:319
size
int size
Definition: twinvq_data.h:10344
FFInputFormat::p
AVInputFormat p
The public AVInputFormat.
Definition: demux.h:51
av_packet_alloc
AVPacket * av_packet_alloc(void)
Allocate an AVPacket and set its fields to default values.
Definition: packet.c:63
read_header
static int read_header(FFV1Context *f, RangeCoder *c)
Definition: ffv1dec.c:498
WC3_AUDIO_BITS
#define WC3_AUDIO_BITS
Definition: wc3movie.c:60
AV_CODEC_ID_XAN_WC3
@ AV_CODEC_ID_XAN_WC3
Definition: codec_id.h:92
wc3_probe
static int wc3_probe(const AVProbeData *p)
Definition: wc3movie.c:87
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:256
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:581
avio_internal.h
AVCodecParameters::height
int height
Definition: codec_par.h:135
AVCodecParameters::block_align
int block_align
Audio only.
Definition: codec_par.h:191
wc3_read_packet
static int wc3_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: wc3movie.c:210
demux.h
wc3_read_close
static int wc3_read_close(AVFormatContext *s)
Definition: wc3movie.c:78
Wc3DemuxContext::width
int width
Definition: wc3movie.c:68
av_get_packet
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:98
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:744
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:236
av_append_packet
int av_append_packet(AVIOContext *s, AVPacket *pkt, int size)
Read data and append it to the current content of the AVPacket.
Definition: utils.c:114
avformat.h
dict.h
AV_RL32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:92
AVStream::index
int index
stream index in AVFormatContext
Definition: avformat.h:750
channel_layout.h
PALETTE_SIZE
#define PALETTE_SIZE
Definition: wc3movie.c:65
SIZE_TAG
#define SIZE_TAG
Definition: wc3movie.c:45
buffer
the frame and frame reference mechanism is intended to as much as expensive copies of that data while still allowing the filters to produce correct results The data is stored in buffers represented by AVFrame structures Several references can point to the same frame buffer
Definition: filter_design.txt:49
Windows::Graphics::DirectX::Direct3D11::p
IDirect3DDxgiInterfaceAccess _COM_Outptr_ void ** p
Definition: vsrc_gfxcapture_winrt.hpp:53
AVPacket::stream_index
int stream_index
Definition: packet.h:590
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:321
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:200
read_probe
static int read_probe(const AVProbeData *p)
Definition: cdg.c:30
AVCodecParameters::bits_per_coded_sample
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:110
mem.h
AV_CHANNEL_LAYOUT_MONO
#define AV_CHANNEL_LAYOUT_MONO
Definition: channel_layout.h:394
PALT_TAG
#define PALT_TAG
Definition: wc3movie.c:46
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:55
AVPacket
This structure stores compressed data.
Definition: packet.h:565
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
av_dict_set
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:86
FFInputFormat
Definition: demux.h:47
INDX_TAG
#define INDX_TAG
Definition: wc3movie.c:47
AVCodecParameters::bit_rate
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: codec_par.h:97
Wc3DemuxContext::video_stream_index
int video_stream_index
Definition: wc3movie.c:71
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
Wc3DemuxContext::height
int height
Definition: wc3movie.c:69
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
ffio_read_size
int ffio_read_size(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:665
WC3_DEFAULT_WIDTH
#define WC3_DEFAULT_WIDTH
Definition: wc3movie.c:55
avstring.h
WC3_FRAME_FPS
#define WC3_FRAME_FPS
Definition: wc3movie.c:63
av_fourcc2str
#define av_fourcc2str(fourcc)
Definition: avutil.h:347
avio_feof
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:349
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