mirror of
https://github.com/mpv-player/mpv
synced 2024-12-24 15:52:25 +00:00
bb725a75f7
patch by Pierre Beyssac <pb@fasterix.frmug.org> git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@10540 b3059339-0415-0410-9bf9-f77b7e298cf2
229 lines
7.0 KiB
C
229 lines
7.0 KiB
C
/*
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raw dv file parser for MPlayer
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by Alexander Neundorf <neundorf@kde.org>
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based on the fli demuxer
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LGPL
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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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#ifdef HAVE_LIBDV095
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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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#include <libdv/dv.h>
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#include <libdv/dv_types.h>
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#define DV_PAL_FRAME_SIZE 144000
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#define DV_NTSC_FRAME_SIZE 122000
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typedef struct
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{
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int current_frame;
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int frame_size;
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off_t current_filepos;
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int frame_number;
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dv_decoder_t *decoder;
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} rawdv_frames_t;
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void demux_seek_rawdv(demuxer_t *demuxer,float rel_seek_secs,int flags)
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{
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rawdv_frames_t *frames = (rawdv_frames_t *)demuxer->priv;
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sh_video_t *sh_video = demuxer->video->sh;
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off_t newpos=(flags&1)?0:frames->current_frame;
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if(flags&2)
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{
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// float 0..1
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newpos+=rel_seek_secs*frames->frame_number;
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}
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else
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{
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// secs
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newpos+=rel_seek_secs*sh_video->fps;
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}
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if(newpos<0)
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newpos=0;
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else if(newpos>frames->frame_number)
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newpos=frames->frame_number;
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frames->current_frame=newpos;
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frames->current_filepos=newpos*frames->frame_size;
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}
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int rawdv_check_file(demuxer_t *demuxer)
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{
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unsigned char tmp_buffer[DV_PAL_FRAME_SIZE];
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int bytes_read=0;
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int result=0;
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dv_decoder_t *td;
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mp_msg(MSGT_DEMUX,MSGL_V,"Checking for DV\n");
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bytes_read=stream_read(demuxer->stream,tmp_buffer,DV_PAL_FRAME_SIZE);
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if ((bytes_read!=DV_PAL_FRAME_SIZE) && (bytes_read!=DV_NTSC_FRAME_SIZE))
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return 0;
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td=dv_decoder_new(TRUE,TRUE,FALSE);
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if (!td)
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return 0;
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td->quality=DV_QUALITY_BEST;
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result=dv_parse_header(td, tmp_buffer);
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if (result<0)
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return 0;
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if ((( td->num_dif_seqs==10) || (td->num_dif_seqs==12))
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&& (td->width==720)
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&& ((td->height==576) || (td->height==480)))
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result=1;
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dv_decoder_free(td);
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return result;
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}
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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_rawdv_fill_buffer(demuxer_t *demuxer)
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{
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rawdv_frames_t *frames = (rawdv_frames_t *)demuxer->priv;
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demux_packet_t* dp_video=NULL;
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sh_video_t *sh_video = demuxer->video->sh;
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int bytes_read=0;
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// fprintf(stderr,"demux_rawdv_fill_buffer() seek to %qu, size: %d\n",frames->current_filepos,frames->frame_size);
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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->current_filepos);
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dp_video=new_demux_packet(frames->frame_size);
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bytes_read=stream_read(demuxer->stream,dp_video->buffer,frames->frame_size);
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if (bytes_read<frames->frame_size)
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return 0;
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dp_video->pts=frames->current_frame/sh_video->fps;
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dp_video->pos=frames->current_filepos;
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dp_video->flags=0;
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if (demuxer->audio && demuxer->audio->id>=-1)
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{
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demux_packet_t* dp_audio=clone_demux_packet(dp_video);
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ds_add_packet(demuxer->audio,dp_audio);
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}
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ds_add_packet(demuxer->video,dp_video);
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// get the next frame ready
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frames->current_filepos+=frames->frame_size;
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frames->current_frame++;
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// fprintf(stderr," audio->packs: %d , video->packs: %d \n",demuxer->audio->packs, demuxer->video->packs);
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return 1;
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}
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demuxer_t* demux_open_rawdv(demuxer_t* demuxer)
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{
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unsigned char dv_frame[DV_PAL_FRAME_SIZE];
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sh_video_t *sh_video = NULL;
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rawdv_frames_t *frames = (rawdv_frames_t *)malloc(sizeof(rawdv_frames_t));
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dv_decoder_t *dv_decoder=NULL;
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mp_msg(MSGT_DEMUXER,MSGL_V,"demux_open_rawdv() end_pos %d\n",demuxer->stream->end_pos);
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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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//get the first frame
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stream_read(demuxer->stream, dv_frame, DV_PAL_FRAME_SIZE);
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//read params from this frame
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dv_decoder=dv_decoder_new(TRUE,TRUE,FALSE);
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dv_decoder->quality=DV_QUALITY_BEST;
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dv_parse_header(dv_decoder, dv_frame);
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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->seekable = 1;
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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('R', 'A', 'D', 'V');
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sh_video->format = mmioFOURCC('D', 'V', 'S', 'D');
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sh_video->disp_w = dv_decoder->width;
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sh_video->disp_h = dv_decoder->height;
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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);
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sh_video->fps= (dv_decoder->system==e_dv_system_525_60?29.97:25);
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sh_video->frametime = 1.0/sh_video->fps;
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// emulate BITMAPINFOHEADER for win32 decoders:
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sh_video->bih=malloc(sizeof(BITMAPINFOHEADER));
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memset(sh_video->bih,0,sizeof(BITMAPINFOHEADER));
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sh_video->bih->biSize=40;
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sh_video->bih->biWidth = dv_decoder->width;
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sh_video->bih->biHeight = dv_decoder->height;
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sh_video->bih->biPlanes=1;
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sh_video->bih->biBitCount=24;
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sh_video->bih->biCompression=sh_video->format; // "DVSD"
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sh_video->bih->biSizeImage=sh_video->bih->biWidth*sh_video->bih->biHeight*3;
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frames->current_filepos=0;
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frames->current_frame=0;
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frames->frame_size=dv_decoder->frame_size;
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frames->frame_number=demuxer->stream->end_pos/frames->frame_size;
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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);
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if (dv_decoder->audio != NULL && demuxer->audio->id>=-1){
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sh_audio_t *sh_audio = new_sh_audio(demuxer, 0);
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demuxer->audio->sh = sh_audio;
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sh_audio->ds = demuxer->audio;
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mp_msg(MSGT_DEMUXER,MSGL_V,"demux_open_rawdv() chan: %d samplerate: %d\n",dv_decoder->audio->num_channels,dv_decoder->audio->frequency );
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// custom fourcc for internal MPlayer use
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sh_audio->format = mmioFOURCC('R', 'A', 'D', 'V');
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sh_audio->wf = malloc(sizeof(WAVEFORMATEX));
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memset(sh_audio->wf, 0, sizeof(WAVEFORMATEX));
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sh_audio->wf->wFormatTag = sh_audio->format;
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sh_audio->wf->nChannels = dv_decoder->audio->num_channels;
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sh_audio->wf->wBitsPerSample = 16;
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sh_audio->wf->nSamplesPerSec = dv_decoder->audio->frequency;
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// info about the input stream:
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sh_audio->wf->nAvgBytesPerSec = sh_video->fps*dv_decoder->frame_size;
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sh_audio->wf->nBlockAlign = dv_decoder->frame_size;
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// sh_audio->context=(void*)dv_decoder;
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}
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stream_reset(demuxer->stream);
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stream_seek(demuxer->stream, 0);
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dv_decoder_free(dv_decoder); //we keep this in the context of both stream headers
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demuxer->priv=frames;
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return demuxer;
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}
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void demux_close_rawdv(demuxer_t* demuxer)
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{
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rawdv_frames_t *frames = (rawdv_frames_t *)demuxer->priv;
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if(frames==0)
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return;
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free(frames);
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}
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#endif
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