mirror of https://github.com/mpv-player/mpv
140 lines
3.8 KiB
C
140 lines
3.8 KiB
C
/*
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FLI file parser for the MPlayer program
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by Mike Melanson
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "config.h"
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#include "mp_msg.h"
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#include "help_mp.h"
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#include "stream.h"
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#include "demuxer.h"
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#include "stheader.h"
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typedef struct _fli_frames_t {
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int num_frames;
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int current_frame;
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off_t *filepos;
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unsigned int *frame_size;
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} fli_frames_t;
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// return value:
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// 0 = EOF or no stream found
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// 1 = successfully read a packet
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int demux_fli_fill_buffer(demuxer_t *demuxer){
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fli_frames_t *frames = (fli_frames_t *)demuxer->priv;
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sh_video_t *sh_video = demuxer->video->sh;
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// see if the end has been reached
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if (frames->current_frame == frames->num_frames)
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return 0;
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// fetch the frame from the file
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// first, position the file properly since ds_read_packet() doesn't
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// seem to do it, even though it takes a file offset as a parameter
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stream_seek(demuxer->stream, frames->filepos[frames->current_frame]);
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ds_read_packet(demuxer->video,
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demuxer->stream,
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frames->frame_size[frames->current_frame],
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frames->current_frame/sh_video->fps,
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frames->filepos[frames->current_frame],
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0 /* what flags? -> demuxer.h (alex) */
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);
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// get the next frame ready
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frames->current_frame++;
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return 1;
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}
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demuxer_t* demux_open_fli(demuxer_t* demuxer){
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sh_video_t *sh_video = NULL;
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fli_frames_t *frames = (fli_frames_t *)malloc(sizeof(fli_frames_t));
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int frame_number;
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int speed;
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unsigned int frame_size;
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int magic_number;
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// go back to the beginning
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stream_reset(demuxer->stream);
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stream_seek(demuxer->stream, 0);
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demuxer->movi_start = 128;
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demuxer->movi_end = stream_read_dword_le(demuxer->stream);
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magic_number = stream_read_word_le(demuxer->stream);
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if ((magic_number != 0xAF11) && (magic_number != 0xAF12))
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{
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mp_msg(MSGT_DEMUX, MSGL_ERR, "Bad/unknown magic number (%04x)\n",
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magic_number);
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return(NULL);
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}
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// fetch the number of frames
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frames->num_frames = stream_read_word_le(demuxer->stream);
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frames->current_frame = 0;
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// allocate enough entries for the indices
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frames->filepos = (off_t *)malloc(frames->num_frames * sizeof(off_t));
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frames->frame_size = (int *)malloc(frames->num_frames * sizeof(int));
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// create a new video stream header
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sh_video = new_sh_video(demuxer, 0);
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// make sure the demuxer knows about the new video stream header
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// (even though new_sh_video() ought to take care of it)
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demuxer->video->sh = sh_video;
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// make sure that the video demuxer stream header knows about its
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// parent video demuxer stream (this is getting wacky), or else
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// video_read_properties() will choke
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sh_video->ds = demuxer->video;
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// custom fourcc for internal MPlayer use
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sh_video->format = mmioFOURCC('F', 'L', 'I', 'C');
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sh_video->disp_w = stream_read_word_le(demuxer->stream);
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sh_video->disp_h = stream_read_word_le(demuxer->stream);
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// skip the video depth and flags
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stream_skip(demuxer->stream, 4);
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// get the speed
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speed = stream_read_word_le(demuxer->stream);
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if (speed == 0)
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speed = 1;
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if (magic_number == 0xAF11)
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speed *= 1000/70;
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sh_video->fps = 1000 / speed;
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sh_video->frametime = 1/sh_video->fps;
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// build the frame index
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stream_seek(demuxer->stream, demuxer->movi_start);
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frame_number = 0;
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while ((!stream_eof(demuxer->stream)) && (frame_number < frames->num_frames))
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{
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frames->filepos[frame_number] = stream_tell(demuxer->stream);
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frame_size = stream_read_dword_le(demuxer->stream);
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magic_number = stream_read_word_le(demuxer->stream);
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stream_skip(demuxer->stream, frame_size - 6);
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// if this chunk has the right magic number, index it
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if (magic_number == 0xF1FA)
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{
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frames->frame_size[frame_number] = frame_size;
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frame_number++;
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}
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}
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// save the actual number of frames indexed
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frames->num_frames = frame_number;
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demuxer->priv = frames;
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return demuxer;
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}
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