libmpdemux/demux_rawdv.c

   1 /*
   2  * raw DV file parser
   3  * copyright (c) 2002 Alexander Neundorf <neundorf@kde.org>
   4  * based on the fli demuxer
   5  *
   6  * This file is part of MPlayer.
   7  *
   8  * MPlayer is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * MPlayer is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with MPlayer; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <unistd.h>
  26
  27 #include "config.h"
  28
  29 #include "mp_msg.h"
  30
  31 #include "stream/stream.h"
  32 #include "demuxer.h"
  33 #include "stheader.h"
  34
  35 #include <libdv/dv.h>
  36 #include <libdv/dv_types.h>
  37
  38 #define DV_PAL_FRAME_SIZE  144000
  39 #define DV_NTSC_FRAME_SIZE 122000
  40
  41 typedef struct
  42 {
  43    int current_frame;
  44    int frame_size;
  45    off_t current_filepos;
  46    int frame_number;
  47    dv_decoder_t *decoder;
  48 } rawdv_frames_t;
  49
  50 static void demux_seek_rawdv(demuxer_t *demuxer,float rel_seek_secs,float audio_delay,int flags)
  51 {
  52    rawdv_frames_t *frames = (rawdv_frames_t *)demuxer->priv;
  53    sh_video_t *sh_video = demuxer->video->sh;
  54    off_t newpos=(flags&SEEK_ABSOLUTE)?0:frames->current_frame;
  55    if(flags&SEEK_FACTOR)
  56    {
  57       // float 0..1
  58       newpos+=rel_seek_secs*frames->frame_number;
  59    }
  60    else
  61    {
  62       // secs
  63       newpos+=rel_seek_secs*sh_video->fps;
  64    }
  65    if(newpos<0)
  66       newpos=0;
  67    else if(newpos>frames->frame_number)
  68       newpos=frames->frame_number;
  69    frames->current_frame=newpos;
  70    frames->current_filepos=newpos*frames->frame_size;
  71 }
  72
  73 static int rawdv_check_file(demuxer_t *demuxer)
  74 {
  75    unsigned char tmp_buffer[DV_PAL_FRAME_SIZE];
  76    int bytes_read=0;
  77    int result=0;
  78    dv_decoder_t *td;
  79
  80    mp_msg(MSGT_DEMUX,MSGL_V,"Checking for DV\n");
  81
  82    bytes_read=stream_read(demuxer->stream,tmp_buffer,DV_PAL_FRAME_SIZE);
  83    if ((bytes_read!=DV_PAL_FRAME_SIZE) && (bytes_read!=DV_NTSC_FRAME_SIZE))
  84       return 0;
  85
  86    td=dv_decoder_new(TRUE,TRUE,FALSE);
  87    if (!td)
  88       return 0;
  89
  90    td->quality=DV_QUALITY_BEST;
  91    result=dv_parse_header(td, tmp_buffer);
  92    if (result<0)
  93       return 0;
  94
  95    if ((( td->num_dif_seqs==10) || (td->num_dif_seqs==12))
  96        && (td->width==720)
  97        && ((td->height==576) || (td->height==480)))
  98       result=1;
  99    dv_decoder_free(td);
 100    if (result)
 101       return DEMUXER_TYPE_RAWDV;
 102    else
 103       return 0;
 104 }
 105
 106 // return value:
 107 //     0 = EOF or no stream found
 108 //     1 = successfully read a packet
 109 static int demux_rawdv_fill_buffer(demuxer_t *demuxer, demux_stream_t *ds)
 110 {
 111    rawdv_frames_t *frames = (rawdv_frames_t *)demuxer->priv;
 112    demux_packet_t* dp_video=NULL;
 113    sh_video_t *sh_video = demuxer->video->sh;
 114    int bytes_read=0;
 115 //   fprintf(stderr,"demux_rawdv_fill_buffer() seek to %qu, size: %d\n",frames->current_filepos,frames->frame_size);
 116    // fetch the frame from the file
 117    // first, position the file properly since ds_read_packet() doesn't
 118    // seem to do it, even though it takes a file offset as a parameter
 119    stream_seek(demuxer->stream, frames->current_filepos);
 120
 121    dp_video=new_demux_packet(frames->frame_size);
 122    bytes_read=stream_read(demuxer->stream,dp_video->buffer,frames->frame_size);
 123    if (bytes_read<frames->frame_size)
 124       return 0;
 125    dp_video->pts=frames->current_frame/sh_video->fps;
 126    dp_video->pos=frames->current_filepos;
 127    dp_video->flags=0;
 128
 129    if (demuxer->audio && demuxer->audio->id>=-1)
 130    {
 131       demux_packet_t* dp_audio=clone_demux_packet(dp_video);
 132       ds_add_packet(demuxer->audio,dp_audio);
 133    }
 134    ds_add_packet(demuxer->video,dp_video);
 135    // get the next frame ready
 136    frames->current_filepos+=frames->frame_size;
 137    frames->current_frame++;
 138 //   fprintf(stderr," audio->packs: %d , video->packs: %d \n",demuxer->audio->packs, demuxer->video->packs);
 139    return 1;
 140 }
 141
 142 static demuxer_t* demux_open_rawdv(demuxer_t* demuxer)
 143 {
 144    unsigned char dv_frame[DV_PAL_FRAME_SIZE];
 145    sh_video_t *sh_video = NULL;
 146    rawdv_frames_t *frames = malloc(sizeof(rawdv_frames_t));
 147    dv_decoder_t *dv_decoder=NULL;
 148
 149    mp_msg(MSGT_DEMUXER,MSGL_V,"demux_open_rawdv() end_pos %"PRId64"\n",(int64_t)demuxer->stream->end_pos);
 150
 151    // go back to the beginning
 152    stream_reset(demuxer->stream);
 153    stream_seek(demuxer->stream, 0);
 154
 155    //get the first frame
 156    stream_read(demuxer->stream, dv_frame, DV_PAL_FRAME_SIZE);
 157
 158    //read params from this frame
 159    dv_decoder=dv_decoder_new(TRUE,TRUE,FALSE);
 160    dv_decoder->quality=DV_QUALITY_BEST;
 161
 162    if (dv_parse_header(dv_decoder, dv_frame) == -1)
 163            return NULL;
 164
 165    // create a new video stream header
 166    sh_video = new_sh_video(demuxer, 0);
 167    if (!sh_video)
 168            return NULL;
 169
 170    // make sure the demuxer knows about the new video stream header
 171    // (even though new_sh_video() ought to take care of it)
 172    demuxer->seekable = 1;
 173    demuxer->video->sh = sh_video;
 174
 175    // make sure that the video demuxer stream header knows about its
 176    // parent video demuxer stream (this is getting wacky), or else
 177    // video_read_properties() will choke
 178    sh_video->ds = demuxer->video;
 179
 180    // custom fourcc for internal MPlayer use
 181 //   sh_video->format = mmioFOURCC('R', 'A', 'D', 'V');
 182    sh_video->format = mmioFOURCC('D', 'V', 'S', 'D');
 183
 184    sh_video->disp_w = dv_decoder->width;
 185    sh_video->disp_h = dv_decoder->height;
 186    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);
 187
 188    sh_video->fps= (dv_decoder->system==e_dv_system_525_60?29.97:25);
 189    sh_video->frametime = 1.0/sh_video->fps;
 190
 191   // emulate BITMAPINFOHEADER for win32 decoders:
 192   sh_video->bih=calloc(1, sizeof(*sh_video->bih));
 193   sh_video->bih->biSize=40;
 194   sh_video->bih->biWidth = dv_decoder->width;
 195   sh_video->bih->biHeight = dv_decoder->height;
 196   sh_video->bih->biPlanes=1;
 197   sh_video->bih->biBitCount=24;
 198   sh_video->bih->biCompression=sh_video->format; // "DVSD"
 199   sh_video->bih->biSizeImage=sh_video->bih->biWidth*sh_video->bih->biHeight*3;
 200
 201
 202    frames->current_filepos=0;
 203    frames->current_frame=0;
 204    frames->frame_size=dv_decoder->frame_size;
 205    frames->frame_number=demuxer->stream->end_pos/frames->frame_size;
 206
 207    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);
 208     if (dv_decoder->audio != NULL && demuxer->audio->id>=-1){
 209        sh_audio_t *sh_audio =  new_sh_audio(demuxer, 0);
 210        demuxer->audio->id = 0;
 211             demuxer->audio->sh = sh_audio;
 212             sh_audio->ds = demuxer->audio;
 213        mp_msg(MSGT_DEMUXER,MSGL_V,"demux_open_rawdv() chan: %d samplerate: %d\n",dv_decoder->audio->num_channels,dv_decoder->audio->frequency );
 214        // custom fourcc for internal MPlayer use
 215        sh_audio->format = mmioFOURCC('R', 'A', 'D', 'V');
 216
 217         sh_audio->wf = calloc(1, sizeof(*sh_audio->wf));
 218         sh_audio->wf->wFormatTag = sh_audio->format;
 219         sh_audio->wf->nChannels = dv_decoder->audio->num_channels;
 220         sh_audio->wf->wBitsPerSample = 16;
 221         sh_audio->wf->nSamplesPerSec = dv_decoder->audio->frequency;
 222         // info about the input stream:
 223         sh_audio->wf->nAvgBytesPerSec = sh_video->fps*dv_decoder->frame_size;
 224         sh_audio->wf->nBlockAlign = dv_decoder->frame_size;
 225
 226 //       sh_audio->context=(void*)dv_decoder;
 227     }
 228    stream_reset(demuxer->stream);
 229    stream_seek(demuxer->stream, 0);
 230    dv_decoder_free(dv_decoder);  //we keep this in the context of both stream headers
 231    demuxer->priv=frames;
 232    return demuxer;
 233 }
 234
 235 static void demux_close_rawdv(demuxer_t* demuxer)
 236 {
 237    rawdv_frames_t *frames = (rawdv_frames_t *)demuxer->priv;
 238
 239    if(frames==0)
 240       return;
 241   free(frames);
 242 }
 243
 244 static int demux_rawdv_control(demuxer_t *demuxer,int cmd, void *arg) {
 245     rawdv_frames_t *frames = (rawdv_frames_t *)demuxer->priv;
 246     sh_video_t *sh_video=demuxer->video->sh;
 247
 248     switch(cmd) {
 249         case DEMUXER_CTRL_GET_TIME_LENGTH:
 250             *((double *)arg)=(double)frames->frame_number / sh_video->fps;
 251             return DEMUXER_CTRL_OK;
 252
 253         case DEMUXER_CTRL_GET_PERCENT_POS:
 254             *((int *)arg)=(int)(frames->current_frame * 100. / frames->frame_number);
 255             return DEMUXER_CTRL_OK;
 256
 257         default:
 258             return DEMUXER_CTRL_NOTIMPL;
 259     }
 260 }
 261
 262
 263 const demuxer_desc_t demuxer_desc_rawdv = {
 264   "Raw DV demuxer",
 265   "rawdv",
 266   "RAWDV",
 267   "Alexander Neundorf",
 268   "",
 269   DEMUXER_TYPE_RAWDV,
 270   0, // unsafe autodetect
 271   rawdv_check_file,
 272   demux_rawdv_fill_buffer,
 273   demux_open_rawdv,
 274   demux_close_rawdv,
 275   demux_seek_rawdv,
 276   demux_rawdv_control
 277 };