avi.c

video linux conference

/*****************************************************************************
 * avi.c : AVI file Stream input module for vlc
 *****************************************************************************
 * Copyright (C) 2001-2004 VideoLAN
 * $Id: avi.c 10753 2005-04-20 14:55:46Z gbazin $
 * Authors: Laurent Aimar <[e-mail]>
 *
 * This program 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.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
 *****************************************************************************/

/*****************************************************************************
 * Preamble
 *****************************************************************************/
#include <stdlib.h>                                      /* malloc(), free() */

#include <vlc/vlc.h>
#include <vlc/input.h>

#include "vlc_meta.h"
#include "codecs.h"

#include "libavi.h"

/*****************************************************************************
 * Module descriptor
 *****************************************************************************/

#define INTERLEAVE_TEXT N_("Force interleaved method" )
#define INTERLEAVE_LONGTEXT N_( "Force interleaved method" )

#define INDEX_TEXT N_("Force index creation")
#define INDEX_LONGTEXT N_( \
    "Recreate a index for the AVI file so we can seek trough it more reliably." )

static int  Open ( vlc_object_t * );
static void Close( vlc_object_t * );

vlc_module_begin();
    set_shortname( "AVI" );
    set_description( _("AVI demuxer") );
    set_capability( "demux2", 212 );
    set_category( CAT_INPUT );
    set_subcategory( SUBCAT_INPUT_DEMUX );

    add_bool( "avi-interleaved", 0, NULL,
              INTERLEAVE_TEXT, INTERLEAVE_LONGTEXT, VLC_TRUE );
    add_bool( "avi-index", 0, NULL,
              INDEX_TEXT, INDEX_LONGTEXT, VLC_TRUE );

    set_callbacks( Open, Close );
vlc_module_end();

/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
static int Control         ( demux_t *, int, va_list );
static int Seek            ( demux_t *, mtime_t, int );
static int Demux_Seekable  ( demux_t * );
static int Demux_UnSeekable( demux_t * );

#define FREE( p ) if( p ) { free( p ); (p) = NULL; }
#define __ABS( x ) ( (x) < 0 ? (-(x)) : (x) )

typedef struct
{
    vlc_fourcc_t i_fourcc;
    off_t        i_pos;
    uint32_t     i_size;
    vlc_fourcc_t i_type;     /* only for AVIFOURCC_LIST */

    uint8_t      i_peek[8];  /* first 8 bytes */

    unsigned int i_stream;
    unsigned int i_cat;
} avi_packet_t;


typedef struct
{
    vlc_fourcc_t i_id;
    uint32_t     i_flags;
    off_t        i_pos;
    uint32_t     i_length;
    uint32_t     i_lengthtotal;

} avi_entry_t;

typedef struct
{
    vlc_bool_t      b_activated;

    unsigned int    i_cat; /* AUDIO_ES, VIDEO_ES */
    vlc_fourcc_t    i_codec;

    int             i_rate;
    int             i_scale;
    int             i_samplesize;

    es_out_id_t     *p_es;

    avi_entry_t     *p_index;
    unsigned int        i_idxnb;
    unsigned int        i_idxmax;

    unsigned int        i_idxposc;  /* numero of chunk */
    unsigned int        i_idxposb;  /* byte in the current chunk */

    /* For VBR audio only */
    unsigned int        i_blockno;
    unsigned int        i_blocksize;
} avi_track_t;

struct demux_sys_t
{
    mtime_t i_time;
    mtime_t i_length;

    vlc_bool_t  b_seekable;
    avi_chunk_t ck_root;

    vlc_bool_t  b_odml;

    off_t   i_movi_begin;
    off_t   i_movi_lastchunk_pos;   /* XXX position of last valid chunk */

    /* number of streams and information */
    unsigned int i_track;
    avi_track_t  **track;

    /* meta */
    vlc_meta_t  *meta;
};

static inline off_t __EVEN( off_t i )
{
    return (i & 1) ? i + 1 : i;
}

static mtime_t AVI_PTSToChunk( avi_track_t *, mtime_t i_pts );
static mtime_t AVI_PTSToByte ( avi_track_t *, mtime_t i_pts );
static mtime_t AVI_GetDPTS   ( avi_track_t *, int64_t i_count );
static mtime_t AVI_GetPTS    ( avi_track_t * );


static int AVI_StreamChunkFind( demux_t *, unsigned int i_stream );
static int AVI_StreamChunkSet ( demux_t *,
                                unsigned int i_stream, unsigned int i_ck );
static int AVI_StreamBytesSet ( demux_t *,
                                unsigned int i_stream, off_t   i_byte );

vlc_fourcc_t AVI_FourccGetCodec( unsigned int i_cat, vlc_fourcc_t );
static int   AVI_GetKeyFlag    ( vlc_fourcc_t , uint8_t * );

static int AVI_PacketGetHeader( demux_t *, avi_packet_t *p_pk );
static int AVI_PacketNext     ( demux_t * );
static int AVI_PacketRead     ( demux_t *, avi_packet_t *, block_t **);
static int AVI_PacketSearch   ( demux_t * );

static void AVI_IndexLoad    ( demux_t * );
static void AVI_IndexCreate  ( demux_t * );
static void AVI_IndexAddEntry( demux_sys_t *, int, avi_entry_t * );

static mtime_t  AVI_MovieGetLength( demux_t * );

/*****************************************************************************
 * Stream management
 *****************************************************************************/
static int        AVI_TrackSeek  ( demux_t *, int, mtime_t );
static int        AVI_TrackStopFinishedStreams( demux_t *);

/* Remarks:
 - For VBR mp3 stream:
    count blocks by rounded-up chunksizes instead of chunks
    we need full emulation of dshow avi demuxer bugs :(
    fixes silly nandub-style a-v delaying in avi with vbr mp3...
    (from mplayer 2002/08/02)
 - to complete....
 */

/*****************************************************************************
 * Open: check file and initializes AVI structures
 *****************************************************************************/
static int Open( vlc_object_t * p_this )
{
    demux_t  *p_demux = (demux_t *)p_this;
    demux_sys_t     *p_sys;

    avi_chunk_t         ck_riff;
    avi_chunk_list_t    *p_riff = (avi_chunk_list_t*)&ck_riff;
    avi_chunk_list_t    *p_hdrl, *p_movi;
    avi_chunk_avih_t    *p_avih;

    unsigned int i_track;
    unsigned int i, i_peeker;

    uint8_t  *p_peek;

    /* Is it an avi file ? */
    if( stream_Peek( p_demux->s, &p_peek, 200 ) < 200 ) return VLC_EGENERIC;

    for( i_peeker = 0; i_peeker < 188; i_peeker++ )
    {
        if( !strncmp( &p_peek[0], "RIFF", 4 ) &&
            !strncmp( &p_peek[8], "AVI ", 4 ) ) break;
        p_peek++;
    }
    if( i_peeker == 188 )
    {
        return VLC_EGENERIC;
    }

    /* Initialize input  structures. */
    p_sys = p_demux->p_sys = malloc( sizeof(demux_sys_t) );
    memset( p_sys, 0, sizeof( demux_sys_t ) );
    p_sys->i_time   = 0;
    p_sys->i_length = 0;
    p_sys->i_movi_lastchunk_pos = 0;
    p_sys->b_odml   = VLC_FALSE;
    p_sys->i_track  = 0;
    p_sys->track    = NULL;
    p_sys->meta     = NULL;

    stream_Control( p_demux->s, STREAM_CAN_FASTSEEK, &p_sys->b_seekable );

    p_demux->pf_control = Control;
    p_demux->pf_demux = Demux_Seekable;
    /* For unseekable stream, automaticaly use Demux_UnSeekable */
    if( !p_sys->b_seekable || config_GetInt( p_demux, "avi-interleaved" ) )
    {
        p_demux->pf_demux = Demux_UnSeekable;
    }

    if( i_peeker > 0 )
    {
	stream_Read( p_demux->s, NULL, i_peeker );
    }

    if( AVI_ChunkReadRoot( p_demux->s, &p_sys->ck_root ) )
    {
        msg_Err( p_demux, "avi module discarded (invalid file)" );
        return VLC_EGENERIC;
    }

    if( AVI_ChunkCount( &p_sys->ck_root, AVIFOURCC_RIFF ) > 1 )
    {
        unsigned int i_count =
            AVI_ChunkCount( &p_sys->ck_root, AVIFOURCC_RIFF );

        msg_Warn( p_demux, "multiple riff -> OpenDML ?" );
        for( i = 1; i < i_count; i++ )
        {
            avi_chunk_list_t *p_sysx;

            p_sysx = AVI_ChunkFind( &p_sys->ck_root, AVIFOURCC_RIFF, i );
            if( p_sysx->i_type == AVIFOURCC_AVIX )
            {
                msg_Warn( p_demux, "detected OpenDML file" );
                p_sys->b_odml = VLC_TRUE;
                break;
            }
        }
    }

    p_riff  = AVI_ChunkFind( &p_sys->ck_root, AVIFOURCC_RIFF, 0 );
    p_hdrl  = AVI_ChunkFind( p_riff, AVIFOURCC_hdrl, 0 );
    p_movi  = AVI_ChunkFind( p_riff, AVIFOURCC_movi, 0 );

    if( !p_hdrl || !p_movi )
    {
        msg_Err( p_demux, "avi module discarded (invalid file)" );
        goto error;
    }

    if( !( p_avih = AVI_ChunkFind( p_hdrl, AVIFOURCC_avih, 0 ) ) )
    {
        msg_Err( p_demux, "cannot find avih chunk" );
        goto error;
    }
    i_track = AVI_ChunkCount( p_hdrl, AVIFOURCC_strl );
    if( p_avih->i_streams != i_track )
    {
        msg_Warn( p_demux,
                  "found %d stream but %d are declared",
                  i_track, p_avih->i_streams );
    }
    if( i_track == 0 )
    {
        msg_Err( p_demux, "no stream defined!" );
        goto error;
    }

    /* print information on streams */
    msg_Dbg( p_demux, "AVIH: %d stream, flags %s%s%s%s ",
             i_track,
             p_avih->i_flags&AVIF_HASINDEX?" HAS_INDEX":"",
             p_avih->i_flags&AVIF_MUSTUSEINDEX?" MUST_USE_INDEX":"",
             p_avih->i_flags&AVIF_ISINTERLEAVED?" IS_INTERLEAVED":"",
             p_avih->i_flags&AVIF_TRUSTCKTYPE?" TRUST_CKTYPE":"" );
    if( ( p_sys->meta = vlc_meta_New() ) )
    {
        char buffer[200];
        sprintf( buffer, "%s%s%s%s",
                 p_avih->i_flags&AVIF_HASINDEX?" HAS_INDEX":"",
                 p_avih->i_flags&AVIF_MUSTUSEINDEX?" MUST_USE_INDEX":"",
                 p_avih->i_flags&AVIF_ISINTERLEAVED?" IS_INTERLEAVED":"",
                 p_avih->i_flags&AVIF_TRUSTCKTYPE?" TRUST_CKTYPE":"" );
        vlc_meta_Add( p_sys->meta, VLC_META_SETTING, buffer );
    }

    /* now read info on each stream and create ES */
    for( i = 0 ; i < i_track; i++ )
    {
        avi_track_t      *tk = malloc( sizeof( avi_track_t ) );
        avi_chunk_list_t *p_strl = AVI_ChunkFind( p_hdrl, AVIFOURCC_strl, i );
        avi_chunk_strh_t *p_strh = AVI_ChunkFind( p_strl, AVIFOURCC_strh, 0 );
        avi_chunk_STRING_t *p_strn = AVI_ChunkFind( p_strl, AVIFOURCC_strn, 0 );
        avi_chunk_strf_auds_t *p_auds;
        avi_chunk_strf_vids_t *p_vids;
        es_format_t fmt;

        tk->b_activated = VLC_FALSE;
        tk->p_index     = 0;
        tk->i_idxnb     = 0;
        tk->i_idxmax    = 0;
        tk->i_idxposc   = 0;
        tk->i_idxposb   = 0;

        tk->i_blockno   = 0;
        tk->i_blocksize = 0;

        p_vids = (avi_chunk_strf_vids_t*)AVI_ChunkFind( p_strl, AVIFOURCC_strf, 0 );
        p_auds = (avi_chunk_strf_auds_t*)AVI_ChunkFind( p_strl, AVIFOURCC_strf, 0 );

        if( p_strl == NULL || p_strh == NULL || p_auds == NULL || p_vids == NULL )
        {
            msg_Warn( p_demux, "stream[%d] incomplete", i );
            continue;
        }

        tk->i_rate  = p_strh->i_rate;
        tk->i_scale = p_strh->i_scale;
        tk->i_samplesize = p_strh->i_samplesize;
        msg_Dbg( p_demux, "stream[%d] rate:%d scale:%d samplesize:%d",
                 i, tk->i_rate, tk->i_scale, tk->i_samplesize );

        switch( p_strh->i_type )
        {
            case( AVIFOURCC_auds ):
                tk->i_cat   = AUDIO_ES;
                tk->i_codec = AVI_FourccGetCodec( AUDIO_ES,
                                                  p_auds->p_wf->wFormatTag );
                if( ( tk->i_blocksize = p_auds->p_wf->nBlockAlign ) == 0 )
                {
                    if( p_auds->p_wf->wFormatTag == 1 )
                    {
                        tk->i_blocksize = p_auds->p_wf->nChannels * (p_auds->p_wf->wBitsPerSample/8);
                    }
                    else
                    {
                        tk->i_blocksize = 1;
                    }
                }
                es_format_Init( &fmt, AUDIO_ES, tk->i_codec );

                fmt.audio.i_channels        = p_auds->p_wf->nChannels;
                fmt.audio.i_rate            = p_auds->p_wf->nSamplesPerSec;
                fmt.i_bitrate               = p_auds->p_wf->nAvgBytesPerSec*8;
                fmt.audio.i_blockalign      = p_auds->p_wf->nBlockAlign;
                fmt.audio.i_bitspersample   = p_auds->p_wf->wBitsPerSample;
                fmt.i_extra = __MIN( p_auds->p_wf->cbSize,
                    p_auds->i_chunk_size - sizeof(WAVEFORMATEX) );
                fmt.p_extra = &p_auds->p_wf[1];
                msg_Dbg( p_demux, "stream[%d] audio(0x%x) %d channels %dHz %dbits",
                         i, p_auds->p_wf->wFormatTag, p_auds->p_wf->nChannels,
                         p_auds->p_wf->nSamplesPerSec, p_auds->p_wf->wBitsPerSample);
                break;

            case( AVIFOURCC_vids ):
                tk->i_cat   = VIDEO_ES;
                tk->i_codec = AVI_FourccGetCodec( VIDEO_ES,
                                                  p_vids->p_bih->biCompression );
                if( p_vids->p_bih->biCompression == 0x00 )
                {
                    switch( p_vids->p_bih->biBitCount )
                    {
                        case 32:
                            tk->i_codec = VLC_FOURCC('R','V','3','2');
                            break;
                        case 24:
                            tk->i_codec = VLC_FOURCC('R','V','2','4');
                            break;
                        case 16:
                            /* tk->i_codec = VLC_FOURCC('R','V','1','6');*/
                            /* break;*/
                        case 15:
                            tk->i_codec = VLC_FOURCC('R','V','1','5');
                            break;
                        case 9:
                            tk->i_codec = VLC_FOURCC( 'Y', 'V', 'U', '9' ); /* <- TODO check that */
                            break;
                    }