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/*
raw dv file parser for MPlayer
by Alexander Neundorf <neundorf@kde.org>
based on the fli demuxer
LGPL
*/
#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"
#include <libdv/dv.h>
#include <libdv/dv_types.h>
#define DV_PAL_FRAME_SIZE 144000
#define DV_NTSC_FRAME_SIZE 122000
typedef struct
{
int current_frame;
int frame_size;
off_t current_filepos;
int frame_number;
dv_decoder_t *decoder;
} rawdv_frames_t;
static void demux_seek_rawdv(demuxer_t *demuxer,float rel_seek_secs,float audio_delay,int flags)
{
rawdv_frames_t *frames = (rawdv_frames_t *)demuxer->priv;
sh_video_t *sh_video = demuxer->video->sh;
off_t newpos=(flags&1)?0:frames->current_frame;
if(flags&2)
{
// float 0..1
newpos+=rel_seek_secs*frames->frame_number;
}
else
{
// secs
newpos+=rel_seek_secs*sh_video->fps;
}
if(newpos<0)
newpos=0;
else if(newpos>frames->frame_number)
newpos=frames->frame_number;
frames->current_frame=newpos;
frames->current_filepos=newpos*frames->frame_size;
}
static int rawdv_check_file(demuxer_t *demuxer)
{
unsigned char tmp_buffer[DV_PAL_FRAME_SIZE];
int bytes_read=0;
int result=0;
dv_decoder_t *td;
mp_msg(MSGT_DEMUX,MSGL_V,"Checking for DV\n");
bytes_read=stream_read(demuxer->stream,tmp_buffer,DV_PAL_FRAME_SIZE);
if ((bytes_read!=DV_PAL_FRAME_SIZE) && (bytes_read!=DV_NTSC_FRAME_SIZE))
return 0;
td=dv_decoder_new(TRUE,TRUE,FALSE);
if (!td)
return 0;
td->quality=DV_QUALITY_BEST;
result=dv_parse_header(td, tmp_buffer);
if (result<0)
return 0;
if ((( td->num_dif_seqs==10) || (td->num_dif_seqs==12))
&& (td->width==720)
&& ((td->height==576) || (td->height==480)))
result=1;
dv_decoder_free(td);
if (result)
return DEMUXER_TYPE_RAWDV;
else
return 0;
}
// return value:
// 0 = EOF or no stream found
// 1 = successfully read a packet
static int demux_rawdv_fill_buffer(demuxer_t *demuxer, demux_stream_t *ds)
{
rawdv_frames_t *frames = (rawdv_frames_t *)demuxer->priv;
demux_packet_t* dp_video=NULL;
sh_video_t *sh_video = demuxer->video->sh;
int bytes_read=0;
// fprintf(stderr,"demux_rawdv_fill_buffer() seek to %qu, size: %d\n",frames->current_filepos,frames->frame_size);
// 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->current_filepos);
dp_video=new_demux_packet(frames->frame_size);
bytes_read=stream_read(demuxer->stream,dp_video->buffer,frames->frame_size);
if (bytes_read<frames->frame_size)
return 0;
dp_video->pts=frames->current_frame/sh_video->fps;
dp_video->pos=frames->current_filepos;
dp_video->flags=0;
if (demuxer->audio && demuxer->audio->id>=-1)
{
demux_packet_t* dp_audio=clone_demux_packet(dp_video);
ds_add_packet(demuxer->audio,dp_audio);
}
ds_add_packet(demuxer->video,dp_video);
// get the next frame ready
frames->current_filepos+=frames->frame_size;
frames->current_frame++;
// fprintf(stderr," audio->packs: %d , video->packs: %d \n",demuxer->audio->packs, demuxer->video->packs);
return 1;
}
static demuxer_t* demux_open_rawdv(demuxer_t* demuxer)
{
unsigned char dv_frame[DV_PAL_FRAME_SIZE];
sh_video_t *sh_video = NULL;
rawdv_frames_t *frames = malloc(sizeof(rawdv_frames_t));
dv_decoder_t *dv_decoder=NULL;
mp_msg(MSGT_DEMUXER,MSGL_V,"demux_open_rawdv() end_pos %"PRId64"\n",(int64_t)demuxer->stream->end_pos);
// go back to the beginning
stream_reset(demuxer->stream);
stream_seek(demuxer->stream, 0);
//get the first frame
stream_read(demuxer->stream, dv_frame, DV_PAL_FRAME_SIZE);
//read params from this frame
dv_decoder=dv_decoder_new(TRUE,TRUE,FALSE);
dv_decoder->quality=DV_QUALITY_BEST;
dv_parse_header(dv_decoder, dv_frame);
// 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->seekable = 1;
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('R', 'A', 'D', 'V');
sh_video->format = mmioFOURCC('D', 'V', 'S', 'D');
sh_video->disp_w = dv_decoder->width;
sh_video->disp_h = dv_decoder->height;
mp_msg(MSGT_DEMUXER,MSGL_V,"demux_open_rawdv() frame_size: %d w: %d h: %d dif_seq: %d system: %d\n",dv_decoder->frame_size,dv_decoder->width, dv_decoder->height,dv_decoder->num_dif_seqs,dv_decoder->system);
sh_video->fps= (dv_decoder->system==e_dv_system_525_60?29.97:25);
sh_video->frametime = 1.0/sh_video->fps;
// emulate BITMAPINFOHEADER for win32 decoders:
sh_video->bih=malloc(sizeof(BITMAPINFOHEADER));
memset(sh_video->bih,0,sizeof(BITMAPINFOHEADER));
sh_video->bih->biSize=40;
sh_video->bih->biWidth = dv_decoder->width;
sh_video->bih->biHeight = dv_decoder->height;
sh_video->bih->biPlanes=1;
sh_video->bih->biBitCount=24;
sh_video->bih->biCompression=sh_video->format; // "DVSD"
sh_video->bih->biSizeImage=sh_video->bih->biWidth*sh_video->bih->biHeight*3;
frames->current_filepos=0;
frames->current_frame=0;
frames->frame_size=dv_decoder->frame_size;
frames->frame_number=demuxer->stream->end_pos/frames->frame_size;
mp_msg(MSGT_DEMUXER,MSGL_V,"demux_open_rawdv() seek to %qu, size: %d, dv_dec->frame_size: %d\n",frames->current_filepos,frames->frame_size, dv_decoder->frame_size);
if (dv_decoder->audio != NULL && demuxer->audio->id>=-1){
sh_audio_t *sh_audio = new_sh_audio(demuxer, 0);
demuxer->audio->sh = sh_audio;
sh_audio->ds = demuxer->audio;
mp_msg(MSGT_DEMUXER,MSGL_V,"demux_open_rawdv() chan: %d samplerate: %d\n",dv_decoder->audio->num_channels,dv_decoder->audio->frequency );
// custom fourcc for internal MPlayer use
sh_audio->format = mmioFOURCC('R', 'A', 'D', 'V');
sh_audio->wf = malloc(sizeof(WAVEFORMATEX));
memset(sh_audio->wf, 0, sizeof(WAVEFORMATEX));
sh_audio->wf->wFormatTag = sh_audio->format;
sh_audio->wf->nChannels = dv_decoder->audio->num_channels;
sh_audio->wf->wBitsPerSample = 16;
sh_audio->wf->nSamplesPerSec = dv_decoder->audio->frequency;
// info about the input stream:
sh_audio->wf->nAvgBytesPerSec = sh_video->fps*dv_decoder->frame_size;
sh_audio->wf->nBlockAlign = dv_decoder->frame_size;
// sh_audio->context=(void*)dv_decoder;
}
stream_reset(demuxer->stream);
stream_seek(demuxer->stream, 0);
dv_decoder_free(dv_decoder); //we keep this in the context of both stream headers
demuxer->priv=frames;
return demuxer;
}
static void demux_close_rawdv(demuxer_t* demuxer)
{
rawdv_frames_t *frames = (rawdv_frames_t *)demuxer->priv;
if(frames==0)
return;
free(frames);
}
static int demux_rawdv_control(demuxer_t *demuxer,int cmd, void *arg) {
rawdv_frames_t *frames = (rawdv_frames_t *)demuxer->priv;
sh_video_t *sh_video=demuxer->video->sh;
switch(cmd) {
case DEMUXER_CTRL_GET_TIME_LENGTH:
*((double *)arg)=(double)frames->frame_number / sh_video->fps;
return DEMUXER_CTRL_OK;
case DEMUXER_CTRL_GET_PERCENT_POS:
*((int *)arg)=(int)(frames->current_frame * 100. / frames->frame_number);
return DEMUXER_CTRL_OK;
default:
return DEMUXER_CTRL_NOTIMPL;
}
}
demuxer_desc_t demuxer_desc_rawdv = {
"Raw DV demuxer",
"rawdv",
"RAWDV",
"Alexander Neundorf",
"",
DEMUXER_TYPE_RAWDV,
0, // unsafe autodetect
rawdv_check_file,
demux_rawdv_fill_buffer,
demux_open_rawdv,
demux_close_rawdv,
demux_seek_rawdv,
demux_rawdv_control
};
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