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/*
FLI file parser for the MPlayer program
by Mike Melanson
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "config.h"
#include "mp_msg.h"
#include "help_mp.h"
#include "stream.h"
#include "demuxer.h"
#include "stheader.h"
typedef struct _fli_frames_t {
int num_frames;
int current_frame;
off_t *filepos;
unsigned int *frame_size;
} fli_frames_t;
static void demux_seek_fli(demuxer_t *demuxer,float rel_seek_secs,float audio_delay,int flags){
fli_frames_t *frames = (fli_frames_t *)demuxer->priv;
sh_video_t *sh_video = demuxer->video->sh;
int newpos=(flags&1)?0:frames->current_frame;
if(flags&2){
// float 0..1
newpos+=rel_seek_secs*frames->num_frames;
} else {
// secs
newpos+=rel_seek_secs*sh_video->fps;
}
if(newpos<0) newpos=0; else
if(newpos>frames->num_frames) newpos=frames->num_frames;
frames->current_frame=newpos;
}
// return value:
// 0 = EOF or no stream found
// 1 = successfully read a packet
static int demux_fli_fill_buffer(demuxer_t *demuxer, demux_stream_t *ds){
fli_frames_t *frames = (fli_frames_t *)demuxer->priv;
sh_video_t *sh_video = demuxer->video->sh;
// see if the end has been reached
if (frames->current_frame >= frames->num_frames)
return 0;
// fetch the frame from the file
// first, position the file properly since ds_read_packet() doesn't
// seem to do it, even though it takes a file offset as a parameter
stream_seek(demuxer->stream, frames->filepos[frames->current_frame]);
ds_read_packet(demuxer->video,
demuxer->stream,
frames->frame_size[frames->current_frame],
frames->current_frame/sh_video->fps,
frames->filepos[frames->current_frame],
0 /* what flags? -> demuxer.h (alex) */
);
// get the next frame ready
frames->current_frame++;
return 1;
}
static demuxer_t* demux_open_fli(demuxer_t* demuxer){
sh_video_t *sh_video = NULL;
fli_frames_t *frames = malloc(sizeof(fli_frames_t));
int frame_number;
int speed;
unsigned int frame_size;
int magic_number;
unsigned char * header;
// go back to the beginning
stream_reset(demuxer->stream);
stream_seek(demuxer->stream, 0);
header = malloc(sizeof(BITMAPINFOHEADER) + 128);
stream_read(demuxer->stream, header + sizeof(BITMAPINFOHEADER), 128);
stream_seek(demuxer->stream, 0);
demuxer->movi_start = 128;
demuxer->movi_end = stream_read_dword_le(demuxer->stream);
magic_number = stream_read_word_le(demuxer->stream);
if ((magic_number != 0xAF11) && (magic_number != 0xAF12))
{
mp_msg(MSGT_DEMUX, MSGL_ERR, "Bad/unknown magic number (%04x)\n",
magic_number);
free(header);
free(frames);
return(NULL);
}
// fetch the number of frames
frames->num_frames = stream_read_word_le(demuxer->stream);
frames->current_frame = 0;
// allocate enough entries for the indices
// audit: num_frames is 16bit so it is safe against overflow
frames->filepos = malloc(frames->num_frames * sizeof(off_t));
frames->frame_size = malloc(frames->num_frames * sizeof(int));
// create a new video stream header
sh_video = new_sh_video(demuxer, 0);
// make sure the demuxer knows about the new video stream header
// (even though new_sh_video() ought to take care of it)
demuxer->video->sh = sh_video;
// make sure that the video demuxer stream header knows about its
// parent video demuxer stream (this is getting wacky), or else
// video_read_properties() will choke
sh_video->ds = demuxer->video;
// custom fourcc for internal MPlayer use
sh_video->format = mmioFOURCC('F', 'L', 'I', 'C');
sh_video->disp_w = stream_read_word_le(demuxer->stream);
sh_video->disp_h = stream_read_word_le(demuxer->stream);
// pass extradata to codec
sh_video->bih = (BITMAPINFOHEADER*)header;
sh_video->bih->biSize = sizeof(BITMAPINFOHEADER) + 128;
// skip the video depth and flags
stream_skip(demuxer->stream, 4);
// get the speed
speed = stream_read_word_le(demuxer->stream);
if (speed == 0)
speed = 1;
if (magic_number == 0xAF11)
speed *= 1000/70;
sh_video->fps = 1000 / speed;
sh_video->frametime = 1/sh_video->fps;
// build the frame index
stream_seek(demuxer->stream, demuxer->movi_start);
frame_number = 0;
while ((!stream_eof(demuxer->stream)) && (frame_number < frames->num_frames))
{
frames->filepos[frame_number] = stream_tell(demuxer->stream);
frame_size = stream_read_dword_le(demuxer->stream);
magic_number = stream_read_word_le(demuxer->stream);
stream_skip(demuxer->stream, frame_size - 6);
// if this chunk has the right magic number, index it
if ((magic_number == 0xF1FA) || (magic_number == 0xF5FA))
{
frames->frame_size[frame_number] = frame_size;
frame_number++;
}
}
// save the actual number of frames indexed
frames->num_frames = frame_number;
demuxer->priv = frames;
return demuxer;
}
static void demux_close_fli(demuxer_t* demuxer) {
fli_frames_t *frames = demuxer->priv;
if(!frames)
return;
if(frames->filepos)
free(frames->filepos);
if(frames->frame_size)
free(frames->frame_size);
free(frames);
}
static int fli_check_file(demuxer_t* demuxer)
{
int id;
stream_seek(demuxer->stream, 4);
id=stream_read_word_le(demuxer->stream);
// check for the FLI file magic number
if((id==0xAF11) || (id==0xAF12))
return DEMUXER_TYPE_FLI;
return 0;
}
demuxer_desc_t demuxer_desc_fli = {
"Autodesk FLIC demuxer",
"fli",
"FLI",
"Mike Melanson",
"Supports also some extensions",
DEMUXER_TYPE_FLI,
0, // unsafe autodetect (short signature)
fli_check_file,
demux_fli_fill_buffer,
demux_open_fli,
demux_close_fli,
demux_seek_fli,
NULL
};
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