2 * LucasArts Smush demuxer
3 * Copyright (c) 2006 Cyril Zorin
5 * This file is part of FFmpeg.
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.
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.
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
22 #include "libavutil/intreadwrite.h"
28 typedef struct SMUSHContext {
30 int audio_stream_index;
31 int video_stream_index;
34 static int smush_read_probe(AVProbeData *p)
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;
46 static int smush_read_header(AVFormatContext *ctx)
48 SMUSHContext *smush = ctx->priv_data;
49 AVIOContext *pb = ctx->pb;
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];
55 magic = avio_rb32(pb);
56 avio_skip(pb, 4); // skip movie size
58 if (magic == MKBETAG('A', 'N', 'I', 'M')) {
59 if (avio_rb32(pb) != MKBETAG('A', 'H', 'D', 'R'))
60 return AVERROR_INVALIDDATA;
63 if (size < 3 * 256 + 6)
64 return AVERROR_INVALIDDATA;
67 subversion = avio_rl16(pb);
68 nframes = avio_rl16(pb);
70 return AVERROR_INVALIDDATA;
72 avio_skip(pb, 2); // skip pad
74 for (i = 0; i < 256; i++)
75 palette[i] = avio_rb24(pb);
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;
84 return AVERROR_INVALIDDATA;
87 subversion = avio_rl16(pb);
88 nframes = avio_rl32(pb);
90 return AVERROR_INVALIDDATA;
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);
98 if (avio_rb32(pb) != MKBETAG('F', 'L', 'H', 'D'))
99 return AVERROR_INVALIDDATA;
101 size = avio_rb32(pb);
102 while (!got_audio && ((read + 8) < size)) {
103 uint32_t sig, chunk_size;
109 chunk_size = avio_rb32(pb);
112 case MKBETAG('W', 'a', 'v', 'e'):
114 sample_rate = avio_rl32(pb);
116 return AVERROR_INVALIDDATA;
118 channels = avio_rl32(pb);
120 return AVERROR_INVALIDDATA;
122 avio_skip(pb, chunk_size - 8);
125 case MKBETAG('B', 'l', '1', '6'):
126 case MKBETAG('A', 'N', 'N', 'O'):
127 avio_skip(pb, chunk_size);
131 return AVERROR_INVALIDDATA;
135 avio_skip(pb, size - read);
137 av_log(ctx, AV_LOG_ERROR, "Wrong magic\n");
138 return AVERROR_INVALIDDATA;
141 vst = avformat_new_stream(ctx, 0);
143 return AVERROR(ENOMEM);
145 smush->video_stream_index = vst->index;
147 avpriv_set_pts_info(vst, 64, 1, 15);
151 vst->nb_frames = nframes;
152 vst->avg_frame_rate = av_inv_q(vst->time_base);
153 vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
154 vst->codecpar->codec_id = AV_CODEC_ID_SANM;
155 vst->codecpar->codec_tag = 0;
156 vst->codecpar->width = width;
157 vst->codecpar->height = height;
159 if (!smush->version) {
160 if (ff_alloc_extradata(vst->codecpar, 1024 + 2))
161 return AVERROR(ENOMEM);
163 AV_WL16(vst->codecpar->extradata, subversion);
164 for (i = 0; i < 256; i++)
165 AV_WL32(vst->codecpar->extradata + 2 + i * 4, palette[i]);
169 ast = avformat_new_stream(ctx, 0);
171 return AVERROR(ENOMEM);
173 smush->audio_stream_index = ast->index;
176 ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
177 ast->codecpar->codec_id = AV_CODEC_ID_ADPCM_VIMA;
178 ast->codecpar->codec_tag = 0;
179 ast->codecpar->sample_rate = sample_rate;
180 ast->codecpar->channels = channels;
182 avpriv_set_pts_info(ast, 64, 1, ast->codecpar->sample_rate);
188 static int smush_read_packet(AVFormatContext *ctx, AVPacket *pkt)
190 SMUSHContext *smush = ctx->priv_data;
191 AVIOContext *pb = ctx->pb;
202 size = avio_rb32(pb);
205 case MKBETAG('F', 'R', 'M', 'E'):
208 if ((ret = av_get_packet(pb, pkt, size)) < 0)
211 pkt->stream_index = smush->video_stream_index;
214 case MKBETAG('B', 'l', '1', '6'):
215 if ((ret = av_get_packet(pb, pkt, size)) < 0)
218 pkt->stream_index = smush->video_stream_index;
222 case MKBETAG('W', 'a', 'v', 'e'):
224 return AVERROR_INVALIDDATA;
225 if (av_get_packet(pb, pkt, size) < 13)
228 pkt->stream_index = smush->audio_stream_index;
229 pkt->flags |= AV_PKT_FLAG_KEY;
230 pkt->duration = AV_RB32(pkt->data);
231 if (pkt->duration == 0xFFFFFFFFu)
232 pkt->duration = AV_RB32(pkt->data + 8);
244 AVInputFormat ff_smush_demuxer = {
246 .long_name = NULL_IF_CONFIG_SMALL("LucasArts Smush"),
247 .priv_data_size = sizeof(SMUSHContext),
248 .read_probe = smush_read_probe,
249 .read_header = smush_read_header,
250 .read_packet = smush_read_packet,