summaryrefslogtreecommitdiffstats
path: root/libmpdemux/demux_smjpeg.c
blob: 8933e8c8f5d5cdff39f987a2f3d30df67838e088 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
/*
 * SMJPEG file parser
 * copyright (c) 2002 Alex Beregszaszi
 * based on text by Arpi (SMJPEG-format.txt) and later on
 * http://www.lokigames.com/development/download/smjpeg/SMJPEG.txt
 *
 * This file is part of MPlayer.
 *
 * MPlayer is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * MPlayer is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with MPlayer; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h> /* strtok */

#include "config.h"
#include "mp_msg.h"

#include "stream/stream.h"
#include "demuxer.h"
#include "stheader.h"

static int smjpeg_check_file(demuxer_t* demuxer){
    int orig_pos = stream_tell(demuxer->stream);
    char buf[8];
    int version;

    mp_msg(MSGT_DEMUX, MSGL_V, "Checking for SMJPEG\n");

    if (stream_read_word(demuxer->stream) == 0xA)
    {
	stream_read(demuxer->stream, buf, 6);
	buf[7] = 0;

	if (strncmp("SMJPEG", buf, 6)) {
	    mp_msg(MSGT_DEMUX, MSGL_DBG2, "Failed: SMJPEG\n");
	    return 0;
	}
    }
    else
	return 0;

    version = stream_read_dword(demuxer->stream);
    if (version != 0)
    {
	mp_msg(MSGT_DEMUX, MSGL_ERR, "Unknown version (%d) of SMJPEG. Please report!\n",
	    version);
	return 0;
    }

    stream_seek(demuxer->stream, orig_pos);

    return DEMUXER_TYPE_SMJPEG;
}


// return value:
//     0 = EOF or no stream found
//     1 = successfully read a packet
static int demux_smjpeg_fill_buffer(demuxer_t *demux, demux_stream_t *ds)
{
    int dtype, dsize, dpts;

    demux->filepos = stream_tell(demux->stream);

    dtype = stream_read_dword_le(demux->stream);
    dpts = stream_read_dword(demux->stream);
    dsize = stream_read_dword(demux->stream);

    switch(dtype)
    {
	case mmioFOURCC('s','n','d','D'):
	    /* fixme, but no decoder implemented yet */
	    ds_read_packet(demux->audio, demux->stream, dsize,
		(float)dpts/1000.0, demux->filepos, 0);
	    break;
	case mmioFOURCC('v','i','d','D'):
	    ds_read_packet(demux->video, demux->stream, dsize,
		(float)dpts/1000.0, demux->filepos, 0);
	    break;
	case mmioFOURCC('D','O','N','E'):
	    return 1;
	default:
	    return 0;
    }

    return 1;
}

static demuxer_t* demux_open_smjpeg(demuxer_t* demuxer){
    sh_video_t* sh_video;
    sh_audio_t* sh_audio;
    unsigned int htype = 0, hleng;
    int i = 0;

    /* file header */
    stream_skip(demuxer->stream, 8); /* \x00\x0aSMJPEG */
    stream_skip(demuxer->stream, 4);

    mp_msg(MSGT_DEMUX, MSGL_INFO, "This clip is %d seconds\n",
	stream_read_dword(demuxer->stream));

    /* stream header */
    while (i < 3)
    {
	i++;
	htype = stream_read_dword_le(demuxer->stream);
	if (htype == mmioFOURCC('H','E','N','D'))
	    break;
	hleng = (stream_read_word(demuxer->stream)<<16)|stream_read_word(demuxer->stream);
	switch(htype)
	{
	case mmioFOURCC('_','V','I','D'):
	    sh_video = new_sh_video(demuxer, 0);
	    demuxer->video->sh = sh_video;
	    sh_video->ds = demuxer->video;

	    sh_video->bih = calloc(1, sizeof(*sh_video->bih));

	    stream_skip(demuxer->stream, 4); /* number of frames */
//	    sh_video->fps = 24;
//	    sh_video->frametime = 1.0f/sh_video->fps;
	    sh_video->disp_w = stream_read_word(demuxer->stream);
	    sh_video->disp_h = stream_read_word(demuxer->stream);
	    sh_video->format = stream_read_dword_le(demuxer->stream);

	    /* these are false values */
	    sh_video->bih->biSize = 40;
	    sh_video->bih->biWidth = sh_video->disp_w;
	    sh_video->bih->biHeight = sh_video->disp_h;
	    sh_video->bih->biPlanes = 3;
	    sh_video->bih->biBitCount = 12;
	    sh_video->bih->biCompression = sh_video->format;
	    sh_video->bih->biSizeImage = sh_video->disp_w*sh_video->disp_h;
	    break;
	case mmioFOURCC('_','S','N','D'):
	    sh_audio = new_sh_audio(demuxer, 0);
	    demuxer->audio->id = 0;
	    demuxer->audio->sh = sh_audio;
	    sh_audio->ds = demuxer->audio;

	    sh_audio->wf = calloc(1, sizeof(*sh_audio->wf));

	    sh_audio->samplerate = stream_read_word(demuxer->stream);
	    sh_audio->wf->wBitsPerSample = stream_read_char(demuxer->stream);
	    sh_audio->channels = stream_read_char(demuxer->stream);
	    sh_audio->format = stream_read_dword_le(demuxer->stream);
	    sh_audio->wf->wFormatTag = sh_audio->format;
	    sh_audio->wf->nChannels = sh_audio->channels;
	    sh_audio->wf->nSamplesPerSec = sh_audio->samplerate;
	    sh_audio->wf->nAvgBytesPerSec = sh_audio->wf->nChannels*
	    sh_audio->wf->wBitsPerSample*sh_audio->wf->nSamplesPerSec/8;
	    sh_audio->wf->nBlockAlign = sh_audio->channels *2;
	    sh_audio->wf->cbSize = 0;
	    break;
	case mmioFOURCC('_','T','X','T'):
	    stream_skip(demuxer->stream, stream_read_dword(demuxer->stream));
	    break;
	}
    }

    demuxer->seekable = 0;

    return demuxer;
}

static void demux_close_smjpeg(demuxer_t *demuxer)
{
    return;
}


const demuxer_desc_t demuxer_desc_smjpeg = {
  "smjpeg demuxer",
  "smjpeg",
  "SMJPEG",
  "Alex Beregszasi",
  "",
  DEMUXER_TYPE_SMJPEG,
  1, // safe autodetect
  smjpeg_check_file,
  demux_smjpeg_fill_buffer,
  demux_open_smjpeg,
  demux_close_smjpeg,
  NULL,
  NULL
};