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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;
// return value:
// 0 = EOF or no stream found
// 1 = successfully read a packet
int demux_fli_fill_buffer(demuxer_t *demuxer){
fli_frames_t *frames = (fli_frames_t *)demuxer->priv;
// 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],
0, /* not sure what pts is for */
frames->filepos[frames->current_frame],
0 /* what flags? */
);
// get the next frame ready
frames->current_frame++;
return 1;
}
demuxer_t* demux_open_fli(demuxer_t* demuxer){
sh_video_t *sh_video = NULL;
fli_frames_t *frames = (fli_frames_t *)malloc(sizeof(fli_frames_t));
int frame_number;
int speed;
// go back to the beginning
stream_reset(demuxer->stream);
stream_seek(demuxer->stream, 0);
demuxer->movi_start = 128;
demuxer->movi_end = stream_read_dword_le(demuxer->stream);
// skip the magic number
stream_skip(demuxer->stream, 2);
// fetch the number of frames
frames->num_frames = stream_read_word_le(demuxer->stream);
frames->current_frame = 0;
// allocate enough entries for the indices
frames->filepos = (off_t *)malloc(frames->num_frames * sizeof(off_t));
frames->frame_size = (int *)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);
// 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;
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);
frames->frame_size[frame_number] = stream_read_dword_le(demuxer->stream);
stream_skip(demuxer->stream, frames->frame_size[frame_number] - 4);
frame_number++;
}
demuxer->priv = frames;
return demuxer;
}
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