mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-08-31 05:26:37 +02:00
![Diego Biurrun](/assets/img/avatar_default.png)
Otherwise doxygen complains about ambiguous filenames when files exist under the same name in different subdirectories. Originally committed as revision 16912 to svn://svn.ffmpeg.org/ffmpeg/trunk
210 lines
6.5 KiB
C
210 lines
6.5 KiB
C
/*
|
|
* FLI/FLC Animation File Demuxer
|
|
* Copyright (c) 2003 The ffmpeg Project
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* @file libavformat/flic.c
|
|
* FLI/FLC file demuxer
|
|
* by Mike Melanson (melanson@pcisys.net)
|
|
* for more information on the .fli/.flc file format and all of its many
|
|
* variations, visit:
|
|
* http://www.compuphase.com/flic.htm
|
|
*
|
|
* This demuxer handles standard 0xAF11- and 0xAF12-type FLIs. It also
|
|
* handles special FLIs from the PC game "Magic Carpet".
|
|
*/
|
|
|
|
#include "libavutil/intreadwrite.h"
|
|
#include "avformat.h"
|
|
|
|
#define FLIC_FILE_MAGIC_1 0xAF11
|
|
#define FLIC_FILE_MAGIC_2 0xAF12
|
|
#define FLIC_FILE_MAGIC_3 0xAF44 /* Flic Type for Extended FLX Format which
|
|
originated in Dave's Targa Animator (DTA) */
|
|
#define FLIC_CHUNK_MAGIC_1 0xF1FA
|
|
#define FLIC_CHUNK_MAGIC_2 0xF5FA
|
|
#define FLIC_MC_SPEED 5 /* speed for Magic Carpet game FLIs */
|
|
#define FLIC_DEFAULT_SPEED 5 /* for FLIs that have 0 speed */
|
|
|
|
#define FLIC_HEADER_SIZE 128
|
|
#define FLIC_PREAMBLE_SIZE 6
|
|
|
|
typedef struct FlicDemuxContext {
|
|
int video_stream_index;
|
|
int frame_number;
|
|
} FlicDemuxContext;
|
|
|
|
static int flic_probe(AVProbeData *p)
|
|
{
|
|
int magic_number;
|
|
|
|
if(p->buf_size < FLIC_HEADER_SIZE)
|
|
return 0;
|
|
|
|
magic_number = AV_RL16(&p->buf[4]);
|
|
if ((magic_number != FLIC_FILE_MAGIC_1) &&
|
|
(magic_number != FLIC_FILE_MAGIC_2) &&
|
|
(magic_number != FLIC_FILE_MAGIC_3))
|
|
return 0;
|
|
|
|
if(AV_RL16(&p->buf[0x10]) != FLIC_CHUNK_MAGIC_1){
|
|
if(AV_RL32(&p->buf[0x10]) > 2000)
|
|
return 0;
|
|
}
|
|
|
|
if( AV_RL16(&p->buf[0x08]) > 4096
|
|
|| AV_RL16(&p->buf[0x0A]) > 4096)
|
|
return 0;
|
|
|
|
|
|
return AVPROBE_SCORE_MAX;
|
|
}
|
|
|
|
static int flic_read_header(AVFormatContext *s,
|
|
AVFormatParameters *ap)
|
|
{
|
|
FlicDemuxContext *flic = s->priv_data;
|
|
ByteIOContext *pb = s->pb;
|
|
unsigned char header[FLIC_HEADER_SIZE];
|
|
AVStream *st;
|
|
int speed;
|
|
int magic_number;
|
|
|
|
flic->frame_number = 0;
|
|
|
|
/* load the whole header and pull out the width and height */
|
|
if (get_buffer(pb, header, FLIC_HEADER_SIZE) != FLIC_HEADER_SIZE)
|
|
return AVERROR(EIO);
|
|
|
|
magic_number = AV_RL16(&header[4]);
|
|
speed = AV_RL32(&header[0x10]);
|
|
if (speed == 0)
|
|
speed = FLIC_DEFAULT_SPEED;
|
|
|
|
/* initialize the decoder streams */
|
|
st = av_new_stream(s, 0);
|
|
if (!st)
|
|
return AVERROR(ENOMEM);
|
|
flic->video_stream_index = st->index;
|
|
st->codec->codec_type = CODEC_TYPE_VIDEO;
|
|
st->codec->codec_id = CODEC_ID_FLIC;
|
|
st->codec->codec_tag = 0; /* no fourcc */
|
|
st->codec->width = AV_RL16(&header[0x08]);
|
|
st->codec->height = AV_RL16(&header[0x0A]);
|
|
|
|
if (!st->codec->width || !st->codec->height) {
|
|
/* Ugly hack needed for the following sample: */
|
|
/* http://samples.mplayerhq.hu/fli-flc/fli-bugs/specular.flc */
|
|
av_log(s, AV_LOG_WARNING,
|
|
"File with no specified width/height. Trying 640x480.\n");
|
|
st->codec->width = 640;
|
|
st->codec->height = 480;
|
|
}
|
|
|
|
/* send over the whole 128-byte FLIC header */
|
|
st->codec->extradata_size = FLIC_HEADER_SIZE;
|
|
st->codec->extradata = av_malloc(FLIC_HEADER_SIZE);
|
|
memcpy(st->codec->extradata, header, FLIC_HEADER_SIZE);
|
|
|
|
/* Time to figure out the framerate: If there is a FLIC chunk magic
|
|
* number at offset 0x10, assume this is from the Bullfrog game,
|
|
* Magic Carpet. */
|
|
if (AV_RL16(&header[0x10]) == FLIC_CHUNK_MAGIC_1) {
|
|
|
|
av_set_pts_info(st, 64, FLIC_MC_SPEED, 70);
|
|
|
|
/* rewind the stream since the first chunk is at offset 12 */
|
|
url_fseek(pb, 12, SEEK_SET);
|
|
|
|
/* send over abbreviated FLIC header chunk */
|
|
av_free(st->codec->extradata);
|
|
st->codec->extradata_size = 12;
|
|
st->codec->extradata = av_malloc(12);
|
|
memcpy(st->codec->extradata, header, 12);
|
|
|
|
} else if (magic_number == FLIC_FILE_MAGIC_1) {
|
|
av_set_pts_info(st, 64, speed, 70);
|
|
} else if ((magic_number == FLIC_FILE_MAGIC_2) ||
|
|
(magic_number == FLIC_FILE_MAGIC_3)) {
|
|
av_set_pts_info(st, 64, speed, 1000);
|
|
} else {
|
|
av_log(s, AV_LOG_INFO, "Invalid or unsupported magic chunk in file\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int flic_read_packet(AVFormatContext *s,
|
|
AVPacket *pkt)
|
|
{
|
|
FlicDemuxContext *flic = s->priv_data;
|
|
ByteIOContext *pb = s->pb;
|
|
int packet_read = 0;
|
|
unsigned int size;
|
|
int magic;
|
|
int ret = 0;
|
|
unsigned char preamble[FLIC_PREAMBLE_SIZE];
|
|
|
|
while (!packet_read) {
|
|
|
|
if ((ret = get_buffer(pb, preamble, FLIC_PREAMBLE_SIZE)) !=
|
|
FLIC_PREAMBLE_SIZE) {
|
|
ret = AVERROR(EIO);
|
|
break;
|
|
}
|
|
|
|
size = AV_RL32(&preamble[0]);
|
|
magic = AV_RL16(&preamble[4]);
|
|
|
|
if (((magic == FLIC_CHUNK_MAGIC_1) || (magic == FLIC_CHUNK_MAGIC_2)) && size > FLIC_PREAMBLE_SIZE) {
|
|
if (av_new_packet(pkt, size)) {
|
|
ret = AVERROR(EIO);
|
|
break;
|
|
}
|
|
pkt->stream_index = flic->video_stream_index;
|
|
pkt->pts = flic->frame_number++;
|
|
pkt->pos = url_ftell(pb);
|
|
memcpy(pkt->data, preamble, FLIC_PREAMBLE_SIZE);
|
|
ret = get_buffer(pb, pkt->data + FLIC_PREAMBLE_SIZE,
|
|
size - FLIC_PREAMBLE_SIZE);
|
|
if (ret != size - FLIC_PREAMBLE_SIZE) {
|
|
av_free_packet(pkt);
|
|
ret = AVERROR(EIO);
|
|
}
|
|
packet_read = 1;
|
|
} else {
|
|
/* not interested in this chunk */
|
|
url_fseek(pb, size - 6, SEEK_CUR);
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
AVInputFormat flic_demuxer = {
|
|
"flic",
|
|
NULL_IF_CONFIG_SMALL("FLI/FLC/FLX animation format"),
|
|
sizeof(FlicDemuxContext),
|
|
flic_probe,
|
|
flic_read_header,
|
|
flic_read_packet,
|
|
};
|