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(const 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];
56 magic = avio_rb32(pb);
57 avio_skip(pb, 4); // skip movie size
59 if (magic == MKBETAG('A', 'N', 'I', 'M')) {
60 if (avio_rb32(pb) != MKBETAG('A', 'H', 'D', 'R'))
61 return AVERROR_INVALIDDATA;
64 if (size < 3 * 256 + 6)
65 return AVERROR_INVALIDDATA;
68 subversion = avio_rl16(pb);
69 nframes = avio_rl16(pb);
71 return AVERROR_INVALIDDATA;
73 avio_skip(pb, 2); // skip pad
75 for (i = 0; i < 256; i++)
76 palette[i] = avio_rb24(pb);
78 avio_skip(pb, size - (3 * 256 + 6));
79 } else if (magic == MKBETAG('S', 'A', 'N', 'M')) {
80 if (avio_rb32(pb) != MKBETAG('S', 'H', 'D', 'R'))
81 return AVERROR_INVALIDDATA;
85 return AVERROR_INVALIDDATA;
88 subversion = avio_rl16(pb);
89 nframes = avio_rl32(pb);
91 return AVERROR_INVALIDDATA;
93 avio_skip(pb, 2); // skip pad
94 width = avio_rl16(pb);
95 height = avio_rl16(pb);
96 avio_skip(pb, 2); // skip pad
97 avio_skip(pb, size - 14);
99 if (avio_rb32(pb) != MKBETAG('F', 'L', 'H', 'D'))
100 return AVERROR_INVALIDDATA;
102 size = avio_rb32(pb);
103 while (!got_audio && ((read + 8) < size)) {
104 uint32_t sig, chunk_size;
110 chunk_size = avio_rb32(pb);
113 case MKBETAG('W', 'a', 'v', 'e'):
115 sample_rate = avio_rl32(pb);
117 return AVERROR_INVALIDDATA;
119 channels = avio_rl32(pb);
121 return AVERROR_INVALIDDATA;
123 avio_skip(pb, chunk_size - 8);
126 case MKBETAG('B', 'l', '1', '6'):
127 case MKBETAG('A', 'N', 'N', 'O'):
128 avio_skip(pb, chunk_size);
132 return AVERROR_INVALIDDATA;
136 avio_skip(pb, size - read);
138 av_log(ctx, AV_LOG_ERROR, "Wrong magic\n");
139 return AVERROR_INVALIDDATA;
142 vst = avformat_new_stream(ctx, 0);
144 return AVERROR(ENOMEM);
146 smush->video_stream_index = vst->index;
148 avpriv_set_pts_info(vst, 64, 1, 15);
152 vst->nb_frames = nframes;
153 vst->avg_frame_rate = av_inv_q(vst->time_base);
154 vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
155 vst->codecpar->codec_id = AV_CODEC_ID_SANM;
156 vst->codecpar->codec_tag = 0;
157 vst->codecpar->width = width;
158 vst->codecpar->height = height;
160 if (!smush->version) {
161 if ((ret = ff_alloc_extradata(vst->codecpar, 1024 + 2)) < 0)
164 AV_WL16(vst->codecpar->extradata, subversion);
165 for (i = 0; i < 256; i++)
166 AV_WL32(vst->codecpar->extradata + 2 + i * 4, palette[i]);
170 ast = avformat_new_stream(ctx, 0);
172 return AVERROR(ENOMEM);
174 smush->audio_stream_index = ast->index;
177 ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
178 ast->codecpar->codec_id = AV_CODEC_ID_ADPCM_VIMA;
179 ast->codecpar->codec_tag = 0;
180 ast->codecpar->sample_rate = sample_rate;
181 ast->codecpar->channels = channels;
183 avpriv_set_pts_info(ast, 64, 1, ast->codecpar->sample_rate);
189 static int smush_read_packet(AVFormatContext *ctx, AVPacket *pkt)
191 SMUSHContext *smush = ctx->priv_data;
192 AVIOContext *pb = ctx->pb;
203 size = avio_rb32(pb);
206 case MKBETAG('F', 'R', 'M', 'E'):
209 if ((ret = av_get_packet(pb, pkt, size)) < 0)
212 pkt->stream_index = smush->video_stream_index;
215 case MKBETAG('B', 'l', '1', '6'):
216 if ((ret = av_get_packet(pb, pkt, size)) < 0)
219 pkt->stream_index = smush->video_stream_index;
223 case MKBETAG('W', 'a', 'v', 'e'):
225 return AVERROR_INVALIDDATA;
226 if (av_get_packet(pb, pkt, size) < 13)
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);
245 AVInputFormat ff_smush_demuxer = {
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,