mirror of https://github.com/mpv-player/mpv
318 lines
8.6 KiB
C
318 lines
8.6 KiB
C
/*
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* NuppelVideo 0.05 file parser
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* for MPlayer
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* by Panagiotis Issaris <takis@lumumba.luc.ac.be>
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*
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* Reworked by alex
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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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#include "nuppelvideo.h"
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struct nuv_signature
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{
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char finfo[12]; /* "NuppelVideo" + \0 */
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char version[5]; /* "0.05" + \0 */
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};
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typedef struct _nuv_position_t nuv_position_t;
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struct _nuv_position_t
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{
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off_t offset;
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float time;
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int frame;
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nuv_position_t* next;
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};
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typedef struct _nuv_info_t
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{
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int current_audio_frame;
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int current_video_frame;
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nuv_position_t *index_list;
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nuv_position_t *current_position;
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} nuv_priv_t;
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/**
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* Seek to a position relative to the current position, indicated in time.
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*/
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void demux_seek_nuv ( demuxer_t *demuxer, float rel_seek_secs, int flags )
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{
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#define MAX_TIME 1000000
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nuv_priv_t* priv = demuxer->priv;
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struct rtframeheader rtjpeg_frameheader;
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int orig_pos;
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int curr_pos;
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float current_time = 0;
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float start_time = MAX_TIME;
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float target_time = start_time + rel_seek_secs * 1000; /* target_time, start_time are ms, rel_seek_secs s */
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orig_pos = stream_tell ( demuxer->stream );
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if ( rel_seek_secs > 0 )
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{
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/* Seeking forward */
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while(current_time < target_time )
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{
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if (stream_read ( demuxer->stream, (char*)& rtjpeg_frameheader, sizeof ( rtjpeg_frameheader ) ) < sizeof(rtjpeg_frameheader))
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return; /* EOF */
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if ( rtjpeg_frameheader.frametype == 'V' )
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{
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priv->current_position->next = (nuv_position_t*) malloc ( sizeof ( nuv_position_t ) );
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priv->current_position = priv->current_position->next;
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priv->current_position->frame = priv->current_video_frame++;
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priv->current_position->time = rtjpeg_frameheader.timecode;
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priv->current_position->offset = orig_pos;
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priv->current_position->next = NULL;
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if ( start_time == MAX_TIME )
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{
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start_time = rtjpeg_frameheader.timecode;
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/* Recalculate target time with real start time */
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target_time = start_time + rel_seek_secs*1000;
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}
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current_time = rtjpeg_frameheader.timecode;
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curr_pos = stream_tell ( demuxer->stream );
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stream_seek ( demuxer->stream, curr_pos + rtjpeg_frameheader.packetlength );
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/* Adjust current sequence pointer */
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}
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else if ( rtjpeg_frameheader.frametype == 'A' )
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{
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if ( start_time == MAX_TIME )
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{
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start_time = rtjpeg_frameheader.timecode;
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/* Recalculate target time with real start time */
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target_time = start_time + rel_seek_secs * 1000;
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}
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current_time = rtjpeg_frameheader.timecode;
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curr_pos = stream_tell ( demuxer->stream );
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stream_seek ( demuxer->stream, curr_pos + rtjpeg_frameheader.packetlength );
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}
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}
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}
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else
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{
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/* Seeking backward */
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nuv_position_t* p;
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start_time = priv->current_position->time;
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/* Recalculate target time with real start time */
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target_time = start_time + rel_seek_secs * 1000;
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if(target_time < 0)
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target_time = 0;
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// Search the target time in the index list, get the offset
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// and go to that offset.
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p = priv->index_list;
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while ( ( p->next != NULL ) && ( p->time < target_time ) )
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{
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p = p->next;
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}
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stream_seek ( demuxer->stream, p->offset );
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priv->current_video_frame = p->frame;
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}
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}
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int demux_nuv_fill_buffer ( demuxer_t *demuxer )
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{
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struct rtframeheader rtjpeg_frameheader;
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int orig_pos;
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nuv_priv_t* priv = demuxer->priv;
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orig_pos = stream_tell ( demuxer->stream );
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if (stream_read ( demuxer->stream, (char*)& rtjpeg_frameheader, sizeof ( rtjpeg_frameheader ) ) < sizeof(rtjpeg_frameheader))
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return 0; /* EOF */
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#if 0
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printf("NUV frame: frametype: %c, comptype: %c, packetlength: %d\n",
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rtjpeg_frameheader.frametype, rtjpeg_frameheader.comptype,
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rtjpeg_frameheader.packetlength);
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#endif
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/* Skip Seekpoint, Text and Sync for now */
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if ((rtjpeg_frameheader.frametype == 'R') ||
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(rtjpeg_frameheader.frametype == 'T') ||
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(rtjpeg_frameheader.frametype == 'S'))
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return 1;
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if (((rtjpeg_frameheader.frametype == 'D') &&
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(rtjpeg_frameheader.comptype == 'R')) ||
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(rtjpeg_frameheader.frametype == 'V'))
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{
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if ( rtjpeg_frameheader.frametype == 'V' )
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{
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priv->current_video_frame++;
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priv->current_position->next = (nuv_position_t*) malloc(sizeof(nuv_position_t));
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priv->current_position = priv->current_position->next;
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priv->current_position->frame = priv->current_video_frame;
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priv->current_position->time = rtjpeg_frameheader.timecode;
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priv->current_position->offset = orig_pos;
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priv->current_position->next = NULL;
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}
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/* put RTjpeg tables, Video info to video buffer */
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stream_seek ( demuxer->stream, orig_pos );
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ds_read_packet ( demuxer->video, demuxer->stream, rtjpeg_frameheader.packetlength + 12,
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rtjpeg_frameheader.timecode*0.001, orig_pos, 0 );
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} else
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/* copy PCM only */
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if (demuxer->audio && (rtjpeg_frameheader.frametype == 'A') &&
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(rtjpeg_frameheader.comptype == '0'))
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{
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priv->current_audio_frame++;
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/* put Audio to audio buffer */
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ds_read_packet ( demuxer->audio, demuxer->stream, rtjpeg_frameheader.packetlength,
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rtjpeg_frameheader.timecode*0.001, orig_pos + 12, 0 );
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}
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return 1;
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}
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demuxer_t* demux_open_nuv ( demuxer_t* demuxer )
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{
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sh_video_t *sh_video = NULL;
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sh_audio_t *sh_audio = NULL;
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struct rtfileheader rtjpeg_fileheader;
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struct rtframeheader rtjpeg_frameheader;
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unsigned long int tbls[128];
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int bytes_read;
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nuv_priv_t* priv = (nuv_priv_t*) malloc ( sizeof ( nuv_priv_t) );
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demuxer->priv = priv;
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priv->current_audio_frame = 0;
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priv->current_video_frame = 0;
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/* Go to the start */
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stream_reset(demuxer->stream);
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stream_seek(demuxer->stream, 0);
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stream_read ( demuxer->stream, (char*)& rtjpeg_fileheader, sizeof(rtjpeg_fileheader) );
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/* no video */
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if (rtjpeg_fileheader.videoblocks == 0)
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{
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printf("No video blocks in file\n");
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return NULL;
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}
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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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*/
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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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*/
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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('N', 'U', 'V', '1');
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sh_video->disp_w = rtjpeg_fileheader.width;
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sh_video->disp_h = rtjpeg_fileheader.height;
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/* NuppelVideo uses pixel aspect ratio
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here display aspect ratio is used.
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For the moment NuppelVideo only supports 1.0 thus
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1.33 == 4:3 aspect ratio.
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*/
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if(rtjpeg_fileheader.aspect == 1.0)
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sh_video->aspect = (float) 1.33;
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/* Get the FPS */
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sh_video->fps = rtjpeg_fileheader.fps;
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sh_video->frametime = 1 / sh_video->fps;
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if (rtjpeg_fileheader.audioblocks != 0)
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{
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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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sh_audio->format = 0x1;
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sh_audio->channels = 2;
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sh_audio->samplerate = 44100;
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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 = sh_audio->channels;
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sh_audio->wf->wBitsPerSample = 16;
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sh_audio->wf->nSamplesPerSec = sh_audio->samplerate;
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sh_audio->wf->nAvgBytesPerSec = sh_audio->wf->nChannels*
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sh_audio->wf->wBitsPerSample*sh_audio->wf->nSamplesPerSec/8;
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sh_audio->wf->nBlockAlign = sh_audio->channels * 2;
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sh_audio->wf->cbSize = 0;
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}
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priv->index_list = (nuv_position_t*) malloc(sizeof(nuv_position_t));
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priv->index_list->frame = 0;
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priv->index_list->time = 0;
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priv->index_list->offset = stream_tell ( demuxer->stream );
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priv->index_list->next = NULL;
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priv->current_position = priv->index_list;
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return demuxer;
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}
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int nuv_check_file ( demuxer_t* demuxer )
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{
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struct nuv_signature ns;
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/* Store original position */
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int orig_pos = stream_tell(demuxer->stream);
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mp_msg ( MSGT_DEMUX, MSGL_V, "Checking for NuppelVideo\n" );
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stream_read(demuxer->stream,(char*)&ns,sizeof(ns));
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if ( strncmp ( ns.finfo, "NuppelVideo", 12 ) )
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return 0; /* Not a NuppelVideo file */
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if ( strncmp ( ns.version, "0.05", 5 ) )
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return 0; /* Wrong version NuppelVideo file */
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/* Return to original position */
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stream_seek ( demuxer->stream, orig_pos );
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return 1;
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}
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void demux_close_nuv(demuxer_t* demuxer) {
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nuv_priv_t* priv = demuxer->priv;
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nuv_position_t* pos;
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if(!priv)
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return;
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for(pos = priv->index_list ; pos != NULL ; ) {
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nuv_position_t* p = pos;
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pos = pos->next;
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free(p);
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}
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free(priv);
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}
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