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2ba45a60 DM |
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; | |
30 | int audio_stream_index; | |
31 | int video_stream_index; | |
32 | } SMUSHContext; | |
33 | ||
34 | static int smush_read_probe(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 | ||
46 | static int smush_read_header(AVFormatContext *ctx) | |
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); | |
154 | vst->codec->codec_type = AVMEDIA_TYPE_VIDEO; | |
155 | vst->codec->codec_id = AV_CODEC_ID_SANM; | |
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; | |
177 | ast->codec->codec_type = AVMEDIA_TYPE_AUDIO; | |
178 | ast->codec->codec_id = AV_CODEC_ID_ADPCM_VIMA; | |
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 | ||
189 | static int smush_read_packet(AVFormatContext *ctx, AVPacket *pkt) | |
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 | ||
245 | AVInputFormat ff_smush_demuxer = { | |
246 | .name = "smush", | |
247 | .long_name = NULL_IF_CONFIG_SMALL("LucasArts Smush"), | |
248 | .priv_data_size = sizeof(SMUSHContext), | |
249 | .read_probe = smush_read_probe, | |
250 | .read_header = smush_read_header, | |
251 | .read_packet = smush_read_packet, | |
252 | }; |