diff options
Diffstat (limited to 'libmpdemux/demux_pva.c')
| -rw-r--r-- | libmpdemux/demux_pva.c | 536 |
1 files changed, 0 insertions, 536 deletions
diff --git a/libmpdemux/demux_pva.c b/libmpdemux/demux_pva.c deleted file mode 100644 index 883641fbc8..0000000000 --- a/libmpdemux/demux_pva.c +++ /dev/null @@ -1,536 +0,0 @@ -/* - * demuxer for PVA files, such as the ones produced by software to manage - * DVB boards like the Hauppauge WinTV DVBs - * copyright (c) 2002 Matteo Giani - * - * Uses info from the PVA file specifications found at - * http://www.technotrend.de/download/av_format_v1.pdf - * - * This file is part of MPlayer. - * - * MPlayer is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * MPlayer is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with MPlayer; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - */ - -/* WARNING: Quite a hack was required in order to get files by MultiDec - * played back correctly. If it breaks anything else, just comment out - * the #define below and it will not be compiled in. */ -#define DEMUX_PVA_MULTIDEC_HACK -#define PVA_NEW_PREBYTES_CODE - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> - -#include "config.h" -#include "mp_msg.h" - -#include "stream/stream.h" -#include "demuxer.h" -#include "stheader.h" - -/* - * #defines below taken from PVA spec (see URL above) - */ - -#define PVA_MAX_VIDEO_PACK_LEN 6*1024 - -#define VIDEOSTREAM 0x01 -#define MAINAUDIOSTREAM 0x02 - -typedef struct { - off_t offset; - long size; - uint8_t type; - uint8_t is_packet_start; - float pts; -} pva_payload_t; - - -typedef struct { - float last_audio_pts; - float last_video_pts; -#ifdef PVA_NEW_PREBYTES_CODE - float video_pts_after_prebytes; - long video_size_after_prebytes; - uint8_t prebytes_delivered; -#endif - uint8_t just_synced; - uint8_t synced_stream_id; -} pva_priv_t; - - - -static int pva_sync(demuxer_t * demuxer) -{ - uint8_t buffer[5]={0,0,0,0,0}; - int count; - pva_priv_t * priv = (pva_priv_t *) demuxer->priv; - - - /* This function is used to find the next nearest PVA packet start after a seek, since a PVA file - * is not indexed. - * The just_synced field is in the priv structure so that pva_get_payload knows pva_sync - * has already read (part of) the PVA header. This way we can avoid to seek back and (hopefully) - * be able to read from pipes and such. - */ - - - for(count=0 ; count<PVA_MAX_VIDEO_PACK_LEN && !demuxer->stream->eof && !priv->just_synced ; count++) - { - buffer[0]=buffer[1]; - buffer[1]=buffer[2]; - buffer[2]=buffer[3]; - buffer[3]=buffer[4]; - buffer[4]=stream_read_char(demuxer->stream); - /* - * Check for a PVA packet beginning sequence: we check both the "AV" word at the - * very beginning and the "0x55" reserved byte (which is unused and set to 0x55 by spec) - */ - if(buffer[0]=='A' && buffer[1] == 'V' && buffer[4] == 0x55) priv->just_synced=1; - //printf("demux_pva: pva_sync(): current offset= %ld\n",stream_tell(demuxer->stream)); - } - if(priv->just_synced) - { - priv->synced_stream_id=buffer[2]; - return 1; - } - else - { - return 0; - } -} - -static int pva_check_file(demuxer_t * demuxer) -{ - uint8_t buffer[5]={0,0,0,0,0}; - mp_msg(MSGT_DEMUX, MSGL_V, "Checking for PVA\n"); - stream_read(demuxer->stream,buffer,5); - if(buffer[0]=='A' && buffer[1] == 'V' && buffer[4] == 0x55) - { - mp_msg(MSGT_DEMUX,MSGL_DBG2, "Success: PVA\n"); - return DEMUXER_TYPE_PVA; - } - else - { - mp_msg(MSGT_DEMUX,MSGL_DBG2, "Failed: PVA\n"); - return 0; - } -} - -static demuxer_t * demux_open_pva (demuxer_t * demuxer) -{ - sh_video_t *sh_video = new_sh_video(demuxer,0); - sh_audio_t *sh_audio = new_sh_audio(demuxer,0); - - - pva_priv_t * priv; - - stream_reset(demuxer->stream); - stream_seek(demuxer->stream,0); - - - - priv=malloc(sizeof(pva_priv_t)); - - if(demuxer->stream->type!=STREAMTYPE_FILE) demuxer->seekable=0; - else demuxer->seekable=1; - - demuxer->priv=priv; - memset(demuxer->priv,0,sizeof(pva_priv_t)); - - if(!pva_sync(demuxer)) - { - mp_msg(MSGT_DEMUX,MSGL_ERR,"Not a PVA file.\n"); - return NULL; - } - - //printf("priv->just_synced %s after initial sync!\n",priv->just_synced?"set":"UNSET"); - - demuxer->video->sh=sh_video; - - //printf("demuxer->stream->end_pos= %d\n",demuxer->stream->end_pos); - - - mp_msg(MSGT_DEMUXER,MSGL_INFO,"Opened PVA demuxer...\n"); - - /* - * Audio and Video codecs: - * the PVA spec only allows MPEG2 video and MPEG layer II audio. No need to check the formats then. - * Moreover, there would be no way to do that since the PVA stream format has no fields to describe - * the used codecs. - */ - - sh_video->format=0x10000002; - sh_video->ds=demuxer->video; - - /* - printf("demuxer->video->id==%d\n",demuxer->video->id); - printf("demuxer->audio->id==%d\n",demuxer->audio->id); - */ - - demuxer->audio->id = 0; - demuxer->audio->sh=sh_audio; - sh_audio->format=0x50; - sh_audio->ds=demuxer->audio; - - demuxer->movi_start=0; - demuxer->movi_end=demuxer->stream->end_pos; - - priv->last_video_pts=-1; - priv->last_audio_pts=-1; - - return demuxer; -} - -static int pva_get_payload(demuxer_t *d, pva_payload_t *payload) -{ - uint8_t flags,pes_head_len; - uint16_t pack_size; - off_t pva_payload_start; - unsigned char buffer[256]; -#ifndef PVA_NEW_PREBYTES_CODE - demux_packet_t * dp; //hack to deliver the preBytes (see PVA doc) -#endif - pva_priv_t * priv; - - - if(d==NULL) - { - mp_msg(MSGT_DEMUX,MSGL_ERR,"demux_pva: pva_get_payload got passed a NULL pointer!\n"); - return 0; - } - - priv = (pva_priv_t *)d->priv; - d->filepos=stream_tell(d->stream); - - - - - if(d->stream->eof) - { - mp_msg(MSGT_DEMUX,MSGL_V,"demux_pva: pva_get_payload() detected stream->eof!!!\n"); - return 0; - } - - //printf("priv->just_synced %s\n",priv->just_synced?"SET":"UNSET"); - -#ifdef PVA_NEW_PREBYTES_CODE - if(priv->prebytes_delivered) - /* The previous call to this fn has delivered the preBytes. Then we are already inside - * the payload. Let's just deliver the video along with its right PTS, the one we stored - * in the priv structure and was in the PVA header before the PreBytes. - */ - { - //printf("prebytes_delivered=1. Resetting.\n"); - payload->size = priv->video_size_after_prebytes; - payload->pts = priv->video_pts_after_prebytes; - payload->is_packet_start = 1; - payload->offset = stream_tell(d->stream); - payload->type = VIDEOSTREAM; - priv->prebytes_delivered = 0; - return 1; - } -#endif - if(!priv->just_synced) - { - if(stream_read_word(d->stream) != (('A'<<8)|'V')) - { - mp_msg(MSGT_DEMUX,MSGL_V,"demux_pva: pva_get_payload() missed a SyncWord at %"PRId64"!! Trying to sync...\n",(int64_t)stream_tell(d->stream)); - if(!pva_sync(d)) - { - if (!d->stream->eof) - { - mp_msg(MSGT_DEMUX,MSGL_ERR,"demux_pva: couldn't sync! (broken file?)"); - } - return 0; - } - } - } - if(priv->just_synced) - { - payload->type=priv->synced_stream_id; - priv->just_synced=0; - } - else - { - payload->type=stream_read_char(d->stream); - stream_skip(d->stream,2); //counter and reserved - } - flags=stream_read_char(d->stream); - payload->is_packet_start=flags & 0x10; - pack_size=stream_read_word(d->stream); - mp_msg(MSGT_DEMUX,MSGL_DBG2,"demux_pva::pva_get_payload(): pack_size=%u field read at offset %"PRIu64"\n",pack_size,(int64_t)stream_tell(d->stream)-2); - pva_payload_start=stream_tell(d->stream); - - - /* - * The code in the #ifdef directive below is a hack needed to get badly formatted PVA files - * such as the ones written by MultiDec played back correctly. - * Basically, it works like this: if the PVA packet does not signal a PES header, but the - * payload looks like one, let's assume it IS one. It has worked for me up to now. - * It can be disabled since it's quite an ugly hack and could potentially break things up - * if the PVA audio payload happens to start with 0x000001 even without being a non signalled - * PES header start. - * Though it's quite unlikely, it potentially could (AFAIK). - */ -#ifdef DEMUX_PVA_MULTIDEC_HACK - if(payload->type==MAINAUDIOSTREAM) - { - stream_read(d->stream,buffer,3); - if(buffer[0]==0x00 && buffer[1]==0x00 && buffer[2]==0x01 && !payload->is_packet_start) - { - mp_msg(MSGT_DEMUX,MSGL_V,"demux_pva: suspecting non signaled audio PES packet start. Maybe file by MultiDec?\n"); - payload->is_packet_start=1; - } - stream_seek(d->stream,stream_tell(d->stream)-3); - } -#endif - - - if(!payload->is_packet_start) - { - payload->offset=stream_tell(d->stream); - payload->size=pack_size; - } - else - { //here comes the good part... - switch(payload->type) - { - case VIDEOSTREAM: - payload->pts=(float)(stream_read_dword(d->stream))/90000; - //printf("Video PTS: %f\n",payload->pts); - if((flags&0x03) -#ifdef PVA_NEW_PREBYTES_CODE - && !priv->prebytes_delivered -#endif - ) - { -#ifndef PVA_NEW_PREBYTES_CODE - dp=new_demux_packet(flags&0x03); - stream_read(d->stream,dp->buffer,flags & 0x03); //read PreBytes - ds_add_packet(d->video,dp); -#else - //printf("Delivering prebytes. Setting prebytes_delivered."); - payload->offset=stream_tell(d->stream); - payload->size = flags & 0x03; - priv->video_pts_after_prebytes = payload->pts; - priv->video_size_after_prebytes = pack_size - 4 - (flags & 0x03); - payload->pts=priv->last_video_pts; - payload->is_packet_start=0; - priv->prebytes_delivered=1; - return 1; -#endif - } - - - //now we are at real beginning of payload. - payload->offset=stream_tell(d->stream); - //size is pack_size minus PTS size minus PreBytes size. - payload->size=pack_size - 4 - (flags & 0x03); - break; - case MAINAUDIOSTREAM: - stream_skip(d->stream,3); //FIXME properly parse PES header. - //printf("StreamID in audio PES header: 0x%2X\n",stream_read_char(d->stream)); - stream_skip(d->stream,4); - - buffer[255]=stream_read_char(d->stream); - pes_head_len=stream_read_char(d->stream); - stream_read(d->stream,buffer,pes_head_len); - if(!(buffer[255]&0x80)) //PES header does not contain PTS. - { - mp_msg(MSGT_DEMUX,MSGL_V,"Audio PES packet does not contain PTS. (pes_head_len=%d)\n",pes_head_len); - payload->pts=priv->last_audio_pts; - break; - } - else //PES header DOES contain PTS - { - if((buffer[0] & 0xf0)!=0x20) // PTS badly formatted - { - mp_msg(MSGT_DEMUX,MSGL_V,"demux_pva: expected audio PTS but badly formatted... (read 0x%02X). Falling back to previous PTS (hack).\n",buffer[0]); - payload->pts=priv->last_audio_pts; - // return 0; - } - else - { - uint64_t temp_pts; - - temp_pts=0LL; - temp_pts|=((uint64_t)(buffer[0] & 0x0e) << 29); - temp_pts|=buffer[1]<<22; - temp_pts|=(buffer[2] & 0xfe) << 14; - temp_pts|=buffer[3]<<7; - temp_pts|=(buffer[4] & 0xfe) >> 1; - /* - * PTS parsing is hopefully finished. - */ - payload->pts=(float)temp_pts/90000; - } - } - payload->offset=stream_tell(d->stream); - payload->size=pack_size-stream_tell(d->stream)+pva_payload_start; - break; - } - } - return 1; -} - -// 0 = EOF or no stream found -// 1 = successfully read a packet -static int demux_pva_fill_buffer (demuxer_t * demux, demux_stream_t *ds) -{ - uint8_t done=0; - demux_packet_t * dp; - pva_priv_t * priv=demux->priv; - pva_payload_t current_payload; - - while(!done) - { - if(!pva_get_payload(demux,¤t_payload)) return 0; - switch(current_payload.type) - { - case VIDEOSTREAM: - if(demux->video->id==-1) demux->video->id=0; - if(!current_payload.is_packet_start && priv->last_video_pts==-1) - { - /* We should only be here at the beginning of a stream, when we have - * not yet encountered a valid Video PTS, or after a seek. - * So, skip these starting packets in order not to deliver the - * player a bogus PTS. - */ - done=0; - } - else - { - /* - * In every other condition, we are delivering the payload. Set this - * so that the following code knows whether to skip it or read it. - */ - done=1; - } - if(demux->video->id!=0) done=0; - if(current_payload.is_packet_start) - { - priv->last_video_pts=current_payload.pts; - //mp_msg(MSGT_DEMUXER,MSGL_DBG2,"demux_pva: Video PTS=%llu , delivered %f\n",current_payload.pts,priv->last_video_pts); - } - if(done) - { - dp=new_demux_packet(current_payload.size); - dp->pts=priv->last_video_pts; - stream_read(demux->stream,dp->buffer,current_payload.size); - ds_add_packet(demux->video,dp); - } - else - { - //printf("Skipping %u video bytes\n",current_payload.size); - stream_skip(demux->stream,current_payload.size); - } - break; - case MAINAUDIOSTREAM: - if(demux->audio->id==-1) demux->audio->id=0; - if(!current_payload.is_packet_start && priv->last_audio_pts==-1) - { - /* Same as above for invalid video PTS, just for audio. */ - done=0; - } - else - { - done=1; - } - if(current_payload.is_packet_start) - { - priv->last_audio_pts=current_payload.pts; - } - if(demux->audio->id!=0) done=0; - if(done) - { - dp=new_demux_packet(current_payload.size); - dp->pts=priv->last_audio_pts; - if(current_payload.offset != stream_tell(demux->stream)) - stream_seek(demux->stream,current_payload.offset); - stream_read(demux->stream,dp->buffer,current_payload.size); - ds_add_packet(demux->audio,dp); - } - else - { - stream_skip(demux->stream,current_payload.size); - } - break; - } - } - return 1; -} - -static void demux_seek_pva(demuxer_t * demuxer,float rel_seek_secs,float audio_delay,int flags) -{ - int total_bitrate=0; - off_t dest_offset; - pva_priv_t * priv=demuxer->priv; - - total_bitrate=((sh_audio_t *)demuxer->audio->sh)->i_bps + ((sh_video_t *)demuxer->video->sh)->i_bps; - - /* - * Compute absolute offset inside the stream. Approximate total bitrate with sum of bitrates - * reported by the audio and video codecs. The seek is not accurate because, just like - * with MPEG streams, the bitrate is not constant. Moreover, we do not take into account - * the overhead caused by PVA and PES headers. - * If the calculated absolute offset is negative, seek to the beginning of the file. - */ - - dest_offset=stream_tell(demuxer->stream)+rel_seek_secs*total_bitrate; - if(dest_offset<0) dest_offset=0; - - stream_seek(demuxer->stream,dest_offset); - - if(!pva_sync(demuxer)) - { - mp_msg(MSGT_DEMUX,MSGL_V,"demux_pva: Couldn't seek!\n"); - return; - } - - /* - * Reset the PTS info inside the pva_priv_t structure. This way we don't deliver - * data with the wrong PTSs (the ones we had before seeking). - * - */ - - priv->last_video_pts=-1; - priv->last_audio_pts=-1; -} - - - -static void demux_close_pva(demuxer_t * demuxer) -{ - free(demuxer->priv); - demuxer->priv = NULL; -} - - -const demuxer_desc_t demuxer_desc_pva = { - "PVA demuxer", - "pva", - "PVA", - "Matteo Giani", - "streams from DVB cards", - DEMUXER_TYPE_PVA, - 0, // unsafe autodetect - pva_check_file, - demux_pva_fill_buffer, - demux_open_pva, - demux_close_pva, - demux_seek_pva, - NULL -}; |