2 * FLI/FLC Animation File Demuxer
3 * Copyright (c) 2003 The ffmpeg Project
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
24 * FLI/FLC file demuxer
25 * by Mike Melanson (melanson@pcisys.net)
26 * for more information on the .fli/.flc file format and all of its many
28 * http://www.compuphase.com/flic.htm
30 * This demuxer handles standard 0xAF11- and 0xAF12-type FLIs. It also
31 * handles special FLIs from the PC game "Magic Carpet".
36 #define FLIC_FILE_MAGIC_1 0xAF11
37 #define FLIC_FILE_MAGIC_2 0xAF12
38 #define FLIC_FILE_MAGIC_3 0xAF44 /* Flic Type for Extended FLX Format which
39 originated in Dave's Targa Animator (DTA) */
40 #define FLIC_CHUNK_MAGIC_1 0xF1FA
41 #define FLIC_CHUNK_MAGIC_2 0xF5FA
42 #define FLIC_MC_SPEED 5 /* speed for Magic Carpet game FLIs */
43 #define FLIC_DEFAULT_SPEED 5 /* for FLIs that have 0 speed */
45 #define FLIC_HEADER_SIZE 128
46 #define FLIC_PREAMBLE_SIZE 6
48 typedef struct FlicDemuxContext {
49 int video_stream_index;
53 static int flic_probe(AVProbeData *p)
57 if(p->buf_size < FLIC_HEADER_SIZE)
60 magic_number = AV_RL16(&p->buf[4]);
61 if ((magic_number != FLIC_FILE_MAGIC_1) &&
62 (magic_number != FLIC_FILE_MAGIC_2) &&
63 (magic_number != FLIC_FILE_MAGIC_3))
66 if(AV_RL16(&p->buf[0x10]) != FLIC_CHUNK_MAGIC_1){
67 if(AV_RL32(&p->buf[0x10]) > 2000)
71 if( AV_RL16(&p->buf[0x08]) > 4096
72 || AV_RL16(&p->buf[0x0A]) > 4096)
76 return AVPROBE_SCORE_MAX;
79 static int flic_read_header(AVFormatContext *s,
80 AVFormatParameters *ap)
82 FlicDemuxContext *flic = s->priv_data;
83 ByteIOContext *pb = s->pb;
84 unsigned char header[FLIC_HEADER_SIZE];
89 flic->frame_number = 0;
91 /* load the whole header and pull out the width and height */
92 if (get_buffer(pb, header, FLIC_HEADER_SIZE) != FLIC_HEADER_SIZE)
95 magic_number = AV_RL16(&header[4]);
96 speed = AV_RL32(&header[0x10]);
98 speed = FLIC_DEFAULT_SPEED;
100 /* initialize the decoder streams */
101 st = av_new_stream(s, 0);
103 return AVERROR(ENOMEM);
104 flic->video_stream_index = st->index;
105 st->codec->codec_type = CODEC_TYPE_VIDEO;
106 st->codec->codec_id = CODEC_ID_FLIC;
107 st->codec->codec_tag = 0; /* no fourcc */
108 st->codec->width = AV_RL16(&header[0x08]);
109 st->codec->height = AV_RL16(&header[0x0A]);
111 if (!st->codec->width || !st->codec->height) {
112 /* Ugly hack needed for the following sample: */
113 /* http://samples.mplayerhq.hu/fli-flc/fli-bugs/specular.flc */
114 av_log(s, AV_LOG_WARNING,
115 "File with no specified width/height. Trying 640x480.\n");
116 st->codec->width = 640;
117 st->codec->height = 480;
120 /* send over the whole 128-byte FLIC header */
121 st->codec->extradata_size = FLIC_HEADER_SIZE;
122 st->codec->extradata = av_malloc(FLIC_HEADER_SIZE);
123 memcpy(st->codec->extradata, header, FLIC_HEADER_SIZE);
125 /* Time to figure out the framerate: If there is a FLIC chunk magic
126 * number at offset 0x10, assume this is from the Bullfrog game,
128 if (AV_RL16(&header[0x10]) == FLIC_CHUNK_MAGIC_1) {
130 av_set_pts_info(st, 64, FLIC_MC_SPEED, 70);
132 /* rewind the stream since the first chunk is at offset 12 */
133 url_fseek(pb, 12, SEEK_SET);
135 /* send over abbreviated FLIC header chunk */
136 av_free(st->codec->extradata);
137 st->codec->extradata_size = 12;
138 st->codec->extradata = av_malloc(12);
139 memcpy(st->codec->extradata, header, 12);
141 } else if (magic_number == FLIC_FILE_MAGIC_1) {
142 av_set_pts_info(st, 64, speed, 70);
143 } else if ((magic_number == FLIC_FILE_MAGIC_2) ||
144 (magic_number == FLIC_FILE_MAGIC_3)) {
145 av_set_pts_info(st, 64, speed, 1000);
147 av_log(s, AV_LOG_INFO, "Invalid or unsupported magic chunk in file\n");
148 return AVERROR_INVALIDDATA;
154 static int flic_read_packet(AVFormatContext *s,
157 FlicDemuxContext *flic = s->priv_data;
158 ByteIOContext *pb = s->pb;
163 unsigned char preamble[FLIC_PREAMBLE_SIZE];
165 while (!packet_read) {
167 if ((ret = get_buffer(pb, preamble, FLIC_PREAMBLE_SIZE)) !=
168 FLIC_PREAMBLE_SIZE) {
173 size = AV_RL32(&preamble[0]);
174 magic = AV_RL16(&preamble[4]);
176 if (((magic == FLIC_CHUNK_MAGIC_1) || (magic == FLIC_CHUNK_MAGIC_2)) && size > FLIC_PREAMBLE_SIZE) {
177 if (av_new_packet(pkt, size)) {
181 pkt->stream_index = flic->video_stream_index;
182 pkt->pts = flic->frame_number++;
183 pkt->pos = url_ftell(pb);
184 memcpy(pkt->data, preamble, FLIC_PREAMBLE_SIZE);
185 ret = get_buffer(pb, pkt->data + FLIC_PREAMBLE_SIZE,
186 size - FLIC_PREAMBLE_SIZE);
187 if (ret != size - FLIC_PREAMBLE_SIZE) {
193 /* not interested in this chunk */
194 url_fseek(pb, size - 6, SEEK_CUR);
201 AVInputFormat flic_demuxer = {
203 NULL_IF_CONFIG_SMALL("FLI/FLC/FLX animation format"),
204 sizeof(FlicDemuxContext),