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Diffstat (limited to 'libmpdemux/demux_ty.c')
| -rw-r--r-- | libmpdemux/demux_ty.c | 899 |
1 files changed, 0 insertions, 899 deletions
diff --git a/libmpdemux/demux_ty.c b/libmpdemux/demux_ty.c deleted file mode 100644 index 527d350bc6..0000000000 --- a/libmpdemux/demux_ty.c +++ /dev/null @@ -1,899 +0,0 @@ -/* - * tivo@wingert.org, February 2003 - * - * Copyright (C) 2003 Christopher R. Wingert - * - * The license covers the portions of this file regarding TiVo additions. - * - * Olaf Beck and Tridge (indirectly) were essential at providing - * information regarding the format of the TiVo streams. - * - * However, no code in the following subsection is directly copied from - * either author. - * - * 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. - */ - - -#include <stdio.h> -#include <stdlib.h> -#include <unistd.h> -#include <time.h> -#include <stdarg.h> - -#include <libavutil/avstring.h> -#include <libavutil/intreadwrite.h> - -#include "config.h" -#include "mp_msg.h" - -#include "libmpcodecs/dec_audio.h" -#include "stream/stream.h" -#include "demuxer.h" -#ifdef DEMUX_TY_OSD -#include "demux_ty_osd.h" -#endif -#include "parse_es.h" -#include "stheader.h" -#include "sub/sub_cc.h" -#include "sub/sub.h" - -// 2/c0: audio data -// 3/c0: audio packet header (PES header) -// 4/c0: audio data (S/A only?) -// 9/c0: audio packet header, AC-3 audio -// 2/e0: video data -// 6/e0: video packet header (PES header) -// 7/e0: video sequence header start -// 8/e0: video I-frame header start -// a/e0: video P-frame header start -// b/e0: video B-frame header start -// c/e0: video GOP header start -// e/01: closed-caption data -// e/02: Extended data services data - - -#define TIVO_PES_FILEID 0xf5467abd -#define TIVO_PART_LENGTH 0x20000000 - -#define CHUNKSIZE ( 128 * 1024 ) -#define MAX_AUDIO_BUFFER ( 16 * 1024 ) - -#define TY_V 1 -#define TY_A 2 - -typedef struct -{ - off_t startOffset; - off_t fileSize; - int chunks; -} tmf_fileParts; - -#define MAX_TMF_PARTS 16 - -typedef struct -{ - int whichChunk; - unsigned char chunk[ CHUNKSIZE ]; - - unsigned char lastAudio[ MAX_AUDIO_BUFFER ]; - int lastAudioEnd; - - int tivoType; // 1 = SA, 2 = DTiVo - - int64_t lastAudioPTS; - int64_t lastVideoPTS; - - off_t size; - int readHeader; - - int tmf; - tmf_fileParts tmfparts[ MAX_TMF_PARTS ]; - int tmf_totalparts; -} TiVoInfo; - -// =========================================================================== -#define TMF_SIG "showing.xml" - -// =========================================================================== -static int ty_tmf_filetoparts( demuxer_t *demux, TiVoInfo *tivo ) -{ - int parts = 0; - - stream_seek(demux->stream, 0); - - mp_msg( MSGT_DEMUX, MSGL_DBG3, "Dumping tar contents\n" ); - while (!demux->stream->eof) - { - char header[ 512 ]; - char *name; - char *extension; - char *sizestr; - int size; - off_t skip; - if (stream_read(demux->stream, header, 512) < 512) - { - mp_msg( MSGT_DEMUX, MSGL_DBG3, "Read bad\n" ); - break; - } - name = header; - name[99] = 0; - sizestr = &header[124]; - sizestr[11] = 0; - size = strtol(sizestr, NULL, 8); - - mp_msg( MSGT_DEMUX, MSGL_DBG3, "name %-20.20s size %-12.12s %d\n", - name, sizestr, size ); - - extension = strrchr(name, '.'); - if (extension && strcmp(extension, ".ty") == 0) - { - if ( parts >= MAX_TMF_PARTS ) { - mp_msg( MSGT_DEMUX, MSGL_ERR, "ty:tmf too big\n" ); - break; - } - tivo->tmfparts[ parts ].fileSize = size; - tivo->tmfparts[ parts ].startOffset = stream_tell(demux->stream); - tivo->tmfparts[ parts ].chunks = size / CHUNKSIZE; - mp_msg(MSGT_DEMUX, MSGL_DBG3, - "tmf_filetoparts(): index %d, chunks %d\n" - "tmf_filetoparts(): size %"PRId64"\n" - "tmf_filetoparts(): startOffset %"PRId64"\n", - parts, tivo->tmfparts[ parts ].chunks, - tivo->tmfparts[ parts ].fileSize, tivo->tmfparts[ parts ].startOffset - ); - parts++; - } - - // size rounded up to blocks - skip = (size + 511) & ~511; - stream_skip(demux->stream, skip); - } - stream_reset(demux->stream); - tivo->tmf_totalparts = parts; - mp_msg( MSGT_DEMUX, MSGL_DBG3, - "tmf_filetoparts(): No More Part Files %d\n", parts ); - - return 1; -} - - -// =========================================================================== -static off_t tmf_filetooffset(TiVoInfo *tivo, int chunk) -{ - int i; - for (i = 0; i < tivo->tmf_totalparts; i++) { - if (chunk < tivo->tmfparts[i].chunks) - return tivo->tmfparts[i].startOffset + chunk * CHUNKSIZE; - chunk -= tivo->tmfparts[i].chunks; - } - return -1; -} - - -// =========================================================================== -static int tmf_load_chunk( demuxer_t *demux, TiVoInfo *tivo, - unsigned char *buff, int readChunk ) -{ - off_t fileoffset; - int count; - - mp_msg( MSGT_DEMUX, MSGL_DBG3, "\ntmf_load_chunk() begin %d\n", - readChunk ); - - fileoffset = tmf_filetooffset(tivo, readChunk); - - if (fileoffset == -1 || !stream_seek(demux->stream, fileoffset)) { - mp_msg( MSGT_DEMUX, MSGL_ERR, "Read past EOF()\n" ); - return 0; - } - count = stream_read( demux->stream, buff, CHUNKSIZE ); - demux->filepos = stream_tell( demux->stream ); - - mp_msg( MSGT_DEMUX, MSGL_DBG3, "tmf_load_chunk() count %x\n", - count ); - - mp_msg( MSGT_DEMUX, MSGL_DBG3, - "tmf_load_chunk() bytes %x %x %x %x %x %x %x %x\n", - buff[ 0 ], buff[ 1 ], buff[ 2 ], buff[ 3 ], - buff[ 4 ], buff[ 5 ], buff[ 6 ], buff[ 7 ] ); - - mp_msg( MSGT_DEMUX, MSGL_DBG3, "tmf_load_chunk() end\n" ); - - return count; -} - -// =========================================================================== - -// DTiVo MPEG 336, 480, 576, 768 -// SA TiVo 864 -// DTiVo AC-3 1550 -// -#define SERIES1_PTS_LENGTH 11 -#define SERIES1_PTS_OFFSET 6 -#define SERIES2_PTS_LENGTH 16 -#define SERIES2_PTS_OFFSET 9 -#define AC3_PTS_LENGTH 16 -#define AC3_PTS_OFFSET 9 - -static int IsValidAudioPacket( int size, int *ptsOffset, int *ptsLen ) -{ - // AC-3 - if ( size == 1550 || size == 1552 ) - { - *ptsOffset = AC3_PTS_OFFSET; - *ptsLen = AC3_PTS_LENGTH; - return 1; - } - - // MPEG - if ( (size & 15) == (SERIES1_PTS_LENGTH & 15) ) - { - *ptsOffset = SERIES1_PTS_OFFSET; - *ptsLen = SERIES1_PTS_LENGTH; - return 1; - } - if ( (size & 15) == (SERIES2_PTS_LENGTH & 15) ) - { - *ptsOffset = SERIES2_PTS_OFFSET; - *ptsLen = SERIES2_PTS_LENGTH; - return 1; - } - mp_msg( MSGT_DEMUX, MSGL_DBG3, "ty:Tossing Audio Packet Size %d\n", - size ); - return 0; -} - - -static int64_t get_ty_pts( unsigned char *buf ) -{ - int a = buf[0] & 0xe; - int b = AV_RB16(buf + 1); - int c = AV_RB16(buf + 3); - - if (!(1 & a & b & c)) // invalid MPEG timestamp - return MP_NOPTS_VALUE; - a >>= 1; b >>= 1; c >>= 1; - return (((uint64_t)a) << 30) | (b << 15) | c; -} - -static void demux_ty_AddToAudioBuffer( TiVoInfo *tivo, unsigned char *buffer, - int size ) -{ - if ( tivo->lastAudioEnd + size < MAX_AUDIO_BUFFER ) - { - memcpy( &tivo->lastAudio[ tivo->lastAudioEnd ], - buffer, size ); - tivo->lastAudioEnd += size; - } - else - mp_msg( MSGT_DEMUX, MSGL_ERR, - "ty:WARNING - Would have blown my audio buffer\n" ); -} - -static void demux_ty_CopyToDemuxPacket( demux_stream_t *ds, - unsigned char *buffer, int size, off_t pos, int64_t pts ) -{ - demux_packet_t *dp = new_demux_packet( size ); - memcpy( dp->buffer, buffer, size ); - if (pts != MP_NOPTS_VALUE) - dp->pts = pts / 90000.0; - dp->pos = pos; - ds_add_packet( ds, dp ); -} - -static int demux_ty_FindESHeader( uint8_t nal, - unsigned char *buffer, int bufferSize ) -{ - uint32_t search = 0x00000100 | nal; - uint32_t found = -1; - uint8_t *p = buffer; - uint8_t *end = p + bufferSize; - while (p < end) { - found <<= 8; - found |= *p++; - if (found == search) - return p - buffer - 4; - } - return -1; -} - -static void demux_ty_FindESPacket( uint8_t nal, - unsigned char *buffer, int bufferSize, int *esOffset1, int *esOffset2 ) -{ - *esOffset1 = demux_ty_FindESHeader(nal, buffer, bufferSize); - if (*esOffset1 == -1) { - *esOffset2 = -1; - return; - } - buffer += *esOffset1 + 1; - bufferSize -= *esOffset1 + 1; - *esOffset2 = demux_ty_FindESHeader(nal, buffer, bufferSize); - if (*esOffset2 != -1) - *esOffset2 += *esOffset1 + 1; -} - -#define VIDEO_NAL 0xe0 -#define AUDIO_NAL 0xc0 -#define AC3_NAL 0xbd - -static int demux_ty_fill_buffer( demuxer_t *demux, demux_stream_t *dsds ) -{ - int invalidType = 0; - int errorHeader = 0; - int recordsDecoded = 0; - - int readSize; - - int numberRecs; - unsigned char *recPtr; - int offset; - - int counter; - - int aid; - - TiVoInfo *tivo = demux->priv; - unsigned char *chunk = tivo->chunk; - - if ( demux->stream->type == STREAMTYPE_DVD ) - return 0; - - mp_msg( MSGT_DEMUX, MSGL_DBG3, "ty:ty processing\n" ); - - if( demux->stream->eof ) return 0; - - // ====================================================================== - // If we haven't figured out the size of the stream, let's do so - // ====================================================================== - if ( demux->stream->type == STREAMTYPE_VSTREAM ) - { - // The vstream code figures out the exact size of the stream - demux->movi_start = 0; - demux->movi_end = demux->stream->end_pos; - tivo->size = demux->stream->end_pos; - } - else - { - // If its a local file, try to find the Part Headers, so we can - // calculate the ACTUAL stream size - // If we can't find it, go off with the file size and hope the - // extract program did the "right thing" - if ( tivo->readHeader == 0 ) - { - off_t filePos; - tivo->readHeader = 1; - - filePos = demux->filepos; - stream_seek( demux->stream, 0 ); - - readSize = stream_read( demux->stream, chunk, CHUNKSIZE ); - - if ( memcmp( chunk, TMF_SIG, sizeof( TMF_SIG ) ) == 0 ) - { - mp_msg( MSGT_DEMUX, MSGL_DBG3, "ty:Detected a tmf\n" ); - tivo->tmf = 1; - ty_tmf_filetoparts( demux, tivo ); - readSize = tmf_load_chunk( demux, tivo, chunk, 0 ); - } - - if ( readSize == CHUNKSIZE && AV_RB32(chunk) == TIVO_PES_FILEID ) - { - off_t numberParts; - - readSize = 0; - - if ( tivo->tmf != 1 ) - { - off_t offset; - - numberParts = demux->stream->end_pos / TIVO_PART_LENGTH; - offset = numberParts * TIVO_PART_LENGTH; - - mp_msg( MSGT_DEMUX, MSGL_DBG3, "ty:ty/ty+Number Parts %"PRId64"\n", - (int64_t)numberParts ); - - if ( offset + CHUNKSIZE < demux->stream->end_pos ) - { - stream_seek( demux->stream, offset ); - readSize = stream_read( demux->stream, chunk, CHUNKSIZE ); - } - } - else - { - numberParts = tivo->tmf_totalparts; - offset = numberParts * TIVO_PART_LENGTH; - readSize = tmf_load_chunk( demux, tivo, chunk, - numberParts * ( TIVO_PART_LENGTH - CHUNKSIZE ) / - CHUNKSIZE ); - } - - if ( readSize == CHUNKSIZE && AV_RB32(chunk) == TIVO_PES_FILEID ) - { - int size = AV_RB24(chunk + 12); - size -= 4; - size *= CHUNKSIZE; - tivo->size = numberParts * TIVO_PART_LENGTH; - tivo->size += size; - mp_msg( MSGT_DEMUX, MSGL_DBG3, - "ty:Header Calc Stream Size %"PRId64"\n", tivo->size ); - } - } - - if ( demux->stream->start_pos > 0 ) - filePos = demux->stream->start_pos; - stream_seek( demux->stream, filePos ); - demux->filepos = stream_tell( demux->stream ); - tivo->whichChunk = filePos / CHUNKSIZE; - } - demux->movi_start = 0; - demux->movi_end = tivo->size; - } - - // ====================================================================== - // Give a clue as to where we are in the stream - // ====================================================================== - mp_msg( MSGT_DEMUX, MSGL_DBG3, - "ty:ty header size %"PRIx64"\n", (int64_t)tivo->size ); - mp_msg( MSGT_DEMUX, MSGL_DBG3, - "ty:ty which Chunk %d\n", tivo->whichChunk ); - mp_msg( MSGT_DEMUX, MSGL_DBG3, - "ty:file end_pos %"PRIx64"\n", (int64_t)demux->stream->end_pos ); - mp_msg( MSGT_DEMUX, MSGL_DBG3, - "\nty:wanted current offset %"PRIx64"\n", (int64_t)stream_tell( demux->stream ) ); - - if ( tivo->size > 0 && stream_tell( demux->stream ) > tivo->size ) - { - demux->stream->eof = 1; - return 0; - } - - do { - if ( tivo->tmf != 1 ) - { - // Make sure we are on a 128k boundary - if ( demux->filepos % CHUNKSIZE != 0 ) - { - int whichChunk = demux->filepos / CHUNKSIZE; - if ( demux->filepos % CHUNKSIZE > CHUNKSIZE / 2 ) - whichChunk++; - stream_seek( demux->stream, whichChunk * CHUNKSIZE ); - } - - demux->filepos = stream_tell( demux->stream ); - tivo->whichChunk = demux->filepos / CHUNKSIZE; - readSize = stream_read( demux->stream, chunk, CHUNKSIZE ); - if ( readSize != CHUNKSIZE ) - return 0; - } - else - { - readSize = tmf_load_chunk( demux, tivo, chunk, tivo->whichChunk ); - if ( readSize != CHUNKSIZE ) - return 0; - tivo->whichChunk++; - } - if (AV_RB32(chunk) == TIVO_PES_FILEID) - mp_msg( MSGT_DEMUX, MSGL_DBG3, "ty:Skipping PART Header\n" ); - } while (AV_RB32(chunk) == TIVO_PES_FILEID); - - mp_msg( MSGT_DEMUX, MSGL_DBG3, - "\nty:actual current offset %"PRIx64"\n", stream_tell( demux->stream ) - - CHUNKSIZE ); - - - // Let's make a Video Demux Stream for MPlayer - aid = 0x0; - if( !demux->v_streams[ aid ] ) new_sh_video( demux, aid ); - if( demux->video->id == -1 ) demux->video->id = aid; - if( demux->video->id == aid ) - { - demux_stream_t *ds = demux->video; - if( !ds->sh ) ds->sh = demux->v_streams[ aid ]; - } - - // ====================================================================== - // Finally, we get to actually parse the chunk - // ====================================================================== - mp_msg( MSGT_DEMUX, MSGL_DBG3, "ty:ty parsing a chunk\n" ); - numberRecs = chunk[ 0 ]; - recPtr = &chunk[ 4 ]; - offset = numberRecs * 16 + 4; - for ( counter = 0 ; counter < numberRecs ; counter++ ) - { - int size = AV_RB24(recPtr) >> 4; - int type = recPtr[ 3 ]; - int nybbleType = recPtr[ 2 ] & 0x0f; - recordsDecoded++; - - mp_msg( MSGT_DEMUX, MSGL_DBG3, - "ty:Record Type %x/%x %d\n", nybbleType, type, size ); - - // ================================================================ - // Video Parsing - // ================================================================ - if ( type == 0xe0 ) - { - if ( size > 0 && size + offset <= CHUNKSIZE ) - { - int esOffset1 = demux_ty_FindESHeader( VIDEO_NAL, &chunk[ offset ], - size); - if ( esOffset1 != -1 ) - tivo->lastVideoPTS = get_ty_pts( - &chunk[ offset + esOffset1 + 9 ] ); - - // Do NOT Pass the PES Header onto the MPEG2 Decode - if( nybbleType != 0x06 ) - demux_ty_CopyToDemuxPacket( demux->video, - &chunk[ offset ], size, demux->filepos + offset, - tivo->lastVideoPTS ); - offset += size; - } - else - errorHeader++; - } - // ================================================================ - // Audio Parsing - // ================================================================ - else if ( type == 0xc0 ) - { - if ( size > 0 && size + offset <= CHUNKSIZE ) - { - if( demux->audio->id == -1 ) - { - if ( nybbleType == 0x02 ) - continue; // DTiVo inconclusive, wait for more - else if ( nybbleType == 0x09 ) - { - mp_msg( MSGT_DEMUX, MSGL_DBG3, "ty:Setting AC-3 Audio\n" ); - aid = 0x80; // AC-3 - } - else - { - mp_msg( MSGT_DEMUX, MSGL_DBG3, "ty:Setting MPEG Audio\n" ); - aid = 0x0; // MPEG Audio - } - - demux->audio->id = aid; - if( !demux->a_streams[ aid ] ) new_sh_audio( demux, aid ); - if( demux->audio->id == aid ) - { - demux_stream_t *ds = demux->audio; - if( !ds->sh ) { - sh_audio_t* sh_a; - ds->sh = demux->a_streams[ aid ]; - sh_a = (sh_audio_t*)ds->sh; - switch(aid & 0xE0){ // 1110 0000 b (high 3 bit: type low 5: id) - case 0x00: sh_a->format=0x50;break; // mpeg - case 0xA0: sh_a->format=0x10001;break; // dvd pcm - case 0x80: if((aid & 0xF8) == 0x88) sh_a->format=0x2001;//dts - else sh_a->format=0x2000;break; // ac3 - } - } - } - } - - aid = demux->audio->id; - - - // SA DTiVo Audio Data, no PES - // ================================================ - if ( nybbleType == 0x02 || nybbleType == 0x04 ) - { - if ( nybbleType == 0x02 && tivo->tivoType == 2 ) - demux_ty_AddToAudioBuffer( tivo, &chunk[ offset ], size ); - else - { - - mp_msg( MSGT_DEMUX, MSGL_DBG3, - "ty:Adding Audio Packet Size %d\n", size ); - demux_ty_CopyToDemuxPacket( demux->audio, - &chunk[ offset ], size, ( demux->filepos + offset ), - tivo->lastAudioPTS ); - } - } - - // 3 - MPEG Audio with PES Header, either SA or DTiVo - // 9 - DTiVo AC3 Audio Data with PES Header - // ================================================ - if ( nybbleType == 0x03 || nybbleType == 0x09 ) - { - int esOffset1, esOffset2; - if ( nybbleType == 0x03 ) - esOffset1 = demux_ty_FindESHeader( AUDIO_NAL, &chunk[ offset ], - size); - - // SA PES Header, No Audio Data - // ================================================ - if ( nybbleType == 0x03 && esOffset1 == 0 && size == 16 ) - { - tivo->tivoType = 1; - tivo->lastAudioPTS = get_ty_pts( &chunk[ offset + - SERIES2_PTS_OFFSET ] ); - } - else - // DTiVo Audio with PES Header - // ================================================ - { - tivo->tivoType = 2; - - demux_ty_AddToAudioBuffer( tivo, &chunk[ offset ], size ); - demux_ty_FindESPacket( nybbleType == 9 ? AC3_NAL : AUDIO_NAL, - tivo->lastAudio, tivo->lastAudioEnd, &esOffset1, - &esOffset2 ); - - if ( esOffset1 != -1 && esOffset2 != -1 ) - { - int packetSize = esOffset2 - esOffset1; - int headerSize; - int ptsOffset; - - if ( IsValidAudioPacket( packetSize, &ptsOffset, - &headerSize ) ) - { - mp_msg( MSGT_DEMUX, MSGL_DBG3, - "ty:Adding DTiVo Audio Packet Size %d\n", - packetSize ); - - tivo->lastAudioPTS = get_ty_pts( - &tivo->lastAudio[ esOffset1 + ptsOffset ] ); - - if (nybbleType == 9) headerSize = 0; - demux_ty_CopyToDemuxPacket - ( - demux->audio, - &tivo->lastAudio[ esOffset1 + headerSize ], - packetSize - headerSize, - demux->filepos + offset, - tivo->lastAudioPTS - ); - - } - - // Collapse the Audio Buffer - tivo->lastAudioEnd -= esOffset2; - memmove( &tivo->lastAudio[ 0 ], - &tivo->lastAudio[ esOffset2 ], - tivo->lastAudioEnd ); - } - } - } - - offset += size; - } - else - errorHeader++; - } - // ================================================================ - // 1 = Closed Caption - // 2 = Extended Data Services - // ================================================================ - else if ( type == 0x01 || type == 0x02 ) - { - unsigned char lastXDS[ 16 ]; - int b = AV_RB24(recPtr) >> 4; - b &= 0x7f7f; - - mp_msg( MSGT_DEMUX, MSGL_DBG3, "ty:%s %04x\n", type == 1 ? "CC" : "XDS", b); - - lastXDS[ 0x00 ] = 0x00; - lastXDS[ 0x01 ] = 0x00; - lastXDS[ 0x02 ] = 0x01; - lastXDS[ 0x03 ] = 0xb2; - lastXDS[ 0x04 ] = 'T'; - lastXDS[ 0x05 ] = 'Y'; - lastXDS[ 0x06 ] = type; - lastXDS[ 0x07 ] = b >> 8; - lastXDS[ 0x08 ] = b; - if ( subcc_enabled ) - demux_ty_CopyToDemuxPacket( demux->video, lastXDS, 0x09, - demux->filepos + offset, tivo->lastVideoPTS ); - } - // ================================================================ - // Unknown - // ================================================================ - else - { - if ( size > 0 && size + offset <= CHUNKSIZE ) - offset += size; - if (type != 3 && type != 5 && (type != 0 || size > 0)) { - mp_msg( MSGT_DEMUX, MSGL_DBG3, "ty:Invalid Type %x\n", type ); - invalidType++; - } - } - recPtr += 16; - } - - if ( errorHeader > 0 || invalidType > 0 ) - { - mp_msg( MSGT_DEMUX, MSGL_DBG3, - "ty:Error Check - Records %d, Parsed %d, Errors %d + %d\n", - numberRecs, recordsDecoded, errorHeader, invalidType ); - - // Invalid MPEG ES Size Check - if ( errorHeader > numberRecs / 2 ) - return 0; - - // Invalid MPEG Stream Type Check - if ( invalidType > numberRecs / 2 ) - return 0; - } - - demux->filepos = stream_tell( demux->stream ); - - return 1; -} - -static void demux_seek_ty( demuxer_t *demuxer, float rel_seek_secs, float audio_delay, int flags ) -{ - demux_stream_t *d_audio = demuxer->audio; - demux_stream_t *d_video = demuxer->video; - sh_audio_t *sh_audio = d_audio->sh; - sh_video_t *sh_video = d_video->sh; - off_t newpos; - off_t res; - TiVoInfo *tivo = demuxer->priv; - - mp_msg( MSGT_DEMUX, MSGL_DBG3, "ty:Seeking to %7.1f\n", rel_seek_secs ); - - tivo->lastAudioEnd = 0; - tivo->lastAudioPTS = MP_NOPTS_VALUE; - tivo->lastVideoPTS = MP_NOPTS_VALUE; - // - //================= seek in MPEG ========================== - demuxer->filepos = stream_tell( demuxer->stream ); - - newpos = ( flags & SEEK_ABSOLUTE ) ? demuxer->movi_start : demuxer->filepos; - - if( flags & SEEK_FACTOR ) - // float seek 0..1 - newpos += ( demuxer->movi_end - demuxer->movi_start ) * rel_seek_secs; - else - { - // time seek (secs) - if( ! sh_video->i_bps ) // unspecified or VBR - newpos += 2324 * 75 * rel_seek_secs; // 174.3 kbyte/sec - else - newpos += sh_video->i_bps * rel_seek_secs; - } - - if ( newpos < demuxer->movi_start ) - { - if( demuxer->stream->type != STREAMTYPE_VCD ) demuxer->movi_start = 0; - if( newpos < demuxer->movi_start ) newpos = demuxer->movi_start; - } - - res = newpos / CHUNKSIZE; - if ( rel_seek_secs >= 0 ) - newpos = ( res + 1 ) * CHUNKSIZE; - else - newpos = res * CHUNKSIZE; - - if ( newpos < 0 ) - newpos = 0; - - tivo->whichChunk = newpos / CHUNKSIZE; - - stream_seek( demuxer->stream, newpos ); - - // re-sync video: - videobuf_code_len = 0; // reset ES stream buffer - - ds_fill_buffer( d_video ); - if( sh_audio ) - ds_fill_buffer( d_audio ); - - while( 1 ) - { - int i; - if( sh_audio && !d_audio->eof && d_video->pts && d_audio->pts ) - { - float a_pts = d_audio->pts; - a_pts += ( ds_tell_pts( d_audio ) - sh_audio->a_in_buffer_len ) / - (float)sh_audio->i_bps; - if( d_video->pts > a_pts ) - { - skip_audio_frame( sh_audio ); // sync audio - continue; - } - } - i = sync_video_packet( d_video ); - if( i == 0x1B3 || i == 0x1B8 ) break; // found it! - if( !i || !skip_video_packet( d_video ) ) break; // EOF? - } -#ifdef DEMUX_TY_OSD - if ( subcc_enabled ) - ty_ClearOSD( 0 ); -#endif -} - -static int demux_ty_control( demuxer_t *demuxer,int cmd, void *arg ) -{ - demux_stream_t *d_video = demuxer->video; - sh_video_t *sh_video = d_video->sh; - - switch(cmd) - { - case DEMUXER_CTRL_GET_TIME_LENGTH: - if(!sh_video->i_bps) // unspecified or VBR - return DEMUXER_CTRL_DONTKNOW; - *(double *)arg= - (double)demuxer->movi_end-demuxer->movi_start/sh_video->i_bps; - return DEMUXER_CTRL_GUESS; - - case DEMUXER_CTRL_GET_PERCENT_POS: - return DEMUXER_CTRL_DONTKNOW; - default: - return DEMUXER_CTRL_NOTIMPL; - } -} - - -static void demux_close_ty( demuxer_t *demux ) -{ - TiVoInfo *tivo = demux->priv; - - free( tivo ); - sub_justify = 0; -} - - -static int ty_check_file(demuxer_t* demuxer) -{ - demuxer->filepos = 0; - TiVoInfo *tivo = calloc(1, sizeof(TiVoInfo)); - demuxer->priv = tivo; - return ds_fill_buffer(demuxer->video) ? DEMUXER_TYPE_MPEG_TY : 0; -} - - -static demuxer_t* demux_open_ty(demuxer_t* demuxer) -{ - sh_audio_t *sh_audio=NULL; - sh_video_t *sh_video=NULL; - - sh_video=demuxer->video->sh;sh_video->ds=demuxer->video; - - if(demuxer->audio->id!=-2) { - if(!ds_fill_buffer(demuxer->audio)){ - mp_msg(MSGT_DEMUXER, MSGL_INFO, "MPEG: %s", - mp_gtext("No audio stream found -> no sound.\n")); - demuxer->audio->sh=NULL; - } else { - sh_audio=demuxer->audio->sh;sh_audio->ds=demuxer->audio; - } - } - - return demuxer; -} - - -const demuxer_desc_t demuxer_desc_mpeg_ty = { - "TiVo demuxer", - "tivo", - "TiVo", - "Christopher R. Wingert", - "Demux streams from TiVo", - DEMUXER_TYPE_MPEG_TY, - 0, // unsafe autodetect - ty_check_file, - demux_ty_fill_buffer, - demux_open_ty, - demux_close_ty, - demux_seek_ty, - demux_ty_control -}; |