Enable ffmpegs TTA decoder, and add a TTA demux to VLC. duration and seeking supported.

configure.ac

@@ -1148,7 +1148,7 @@ dnl
 dnl  default modules
 dnl
 VLC_ADD_PLUGINS([dummy logger memcpy])
-VLC_ADD_PLUGINS([mpgv mpga m4v m4a h264 ps pva avi asf mp4 rawdv nsv real aiff mjpeg demuxdump flac])
+VLC_ADD_PLUGINS([mpgv mpga m4v m4a h264 ps pva avi asf mp4 rawdv nsv real aiff mjpeg demuxdump flac tta])
 VLC_ADD_PLUGINS([cvdsub svcdsub spudec subsdec dvbsub mpeg_audio lpcm a52 dts cinepak flacdec])
 VLC_ADD_PLUGINS([deinterlace invert adjust transform wave ripple psychedelic gradient motionblur rv32 rotate noise])
 VLC_ADD_PLUGINS([fixed32tos16 s16tofixed32 u8tofixed32 mono])

modules/codec/ffmpeg/ffmpeg.c

@@ -1091,6 +1091,12 @@ static struct
       AUDIO_ES, "Cook Audio" },
 #endif
 
+#if LIBAVCODEC_BUILD >= ((51<<16)+(4<<8)+0)
+    /* TTA: The Lossless True Audio */
+    { VLC_FOURCC('T','T','A','1'), CODEC_ID_TTA,
+      AUDIO_ES, "The Lossless True Audio" },
+#endif
+
 #if LIBAVCODEC_BUILD >= ((51<<16)+(8<<8)+0)
     /* Shorten */
     { VLC_FOURCC('s','h','n',' '), CODEC_ID_SHORTEN,

modules/demux/tta.c

+/*****************************************************************************
+ * tta.c : The Lossless True Audio parser
+ *****************************************************************************
+ * Copyright (C) 2006 the VideoLAN team
+ * $Id$
+ *
+ * Authors: Derk-Jan Hartman <hartman at videolan dot org>
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+/*****************************************************************************
+ * Preamble
+ *****************************************************************************/
+#include <vlc/vlc.h>
+#include <vlc/input.h>
+#include <vlc_codec.h>
+#include <math.h>
+
+/*****************************************************************************
+ * Module descriptor
+ *****************************************************************************/
+static int  Open  ( vlc_object_t * );
+static void Close ( vlc_object_t * );
+
+vlc_module_begin();
+    set_shortname( "TTA" );
+    set_description( _("TTA demuxer") );
+    set_category( CAT_INPUT );
+    set_subcategory( SUBCAT_INPUT_DEMUX );
+    set_capability( "demux2", 145 );
+
+    set_callbacks( Open, Close );
+    add_shortcut( "tta" );
+vlc_module_end();
+
+#define TTA_FRAMETIME 1.04489795918367346939
+
+/*****************************************************************************
+ * Local prototypes
+ *****************************************************************************/
+static int Demux  ( demux_t * );
+static int Control( demux_t *, int, va_list );
+
+struct demux_sys_t
+{
+    /* */
+    es_out_id_t *p_es;
+
+    /* */
+    int      i_totalframes;
+    int      i_currentframe;
+    uint32_t *pi_seektable;
+    int      i_datalength;
+    int      i_framelength;
+
+    /* */
+    vlc_meta_t     *p_meta;
+    int64_t        i_start;
+};
+
+/*****************************************************************************
+ * Open: initializes ES structures
+ *****************************************************************************/
+static int Open( vlc_object_t * p_this )
+{
+    demux_t     *p_demux = (demux_t*)p_this;
+    demux_sys_t *p_sys;
+    es_format_t fmt;
+    uint8_t     *p_peek;
+    uint8_t     p_header[22];
+    uint8_t     *p_seektable;
+    int         i_seektable_size = 0, i;
+    //char        psz_info[4096];
+    //module_t    *p_id3;
+
+    if( stream_Peek( p_demux->s, &p_peek, 4 ) < 4 )
+        return VLC_EGENERIC;
+
+    if( !POKE( p_peek, "TTA1", 4 ) )
+    {
+        if( !p_demux->b_force ) return VLC_EGENERIC;
+
+        /* User forced */
+        msg_Err( p_demux, "this doesn't look like a flac stream, "
+                 "continuing anyway" );
+    }
+
+    if( stream_Read( p_demux->s, p_header, 22 ) < 22 )
+        return VLC_EGENERIC;
+
+    /* Fill p_demux fields */
+    p_demux->pf_demux = Demux;
+    p_demux->pf_control = Control;
+    p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
+    
+    /* Read the metadata */
+    es_format_Init( &fmt, AUDIO_ES, VLC_FOURCC( 'T', 'T', 'A', '1' ) );
+    fmt.audio.i_channels = GetWLE( &p_header[6] );
+    fmt.audio.i_bitspersample = GetWLE( &p_header[8] );
+    fmt.audio.i_rate = GetDWLE( &p_header[10] );
+
+    p_sys->i_datalength = GetDWLE( &p_header[14] );
+    p_sys->i_framelength = TTA_FRAMETIME * fmt.audio.i_rate;
+
+    p_sys->i_totalframes = p_sys->i_datalength / p_sys->i_framelength + 
+                          ((p_sys->i_datalength % p_sys->i_framelength) ? 1 : 0);
+    p_sys->i_currentframe = 0;
+
+    i_seektable_size = sizeof(uint32_t)*p_sys->i_totalframes;
+    p_seektable = (uint8_t *)malloc( i_seektable_size );
+    stream_Read( p_demux->s, p_seektable, i_seektable_size );
+    p_sys->pi_seektable = (uint32_t *)malloc(i_seektable_size);
+
+    for( i = 0; i < p_sys->i_totalframes; i++ )
+        p_sys->pi_seektable[i] = GetDWLE( &p_seektable[i*4] );
+
+    stream_Read( p_demux->s, NULL, 4 ); /* CRC */
+
+    /* Store the header and Seektable for avcodec */
+    fmt.i_extra = 22 + (p_sys->i_totalframes * 4) + 4;
+    fmt.p_extra = malloc( fmt.i_extra );
+    memcpy( fmt.p_extra, p_header, 22 );
+    memcpy( fmt.p_extra+22, p_seektable, fmt.i_extra -22 );
+
+    p_sys->p_es = es_out_Add( p_demux->out, &fmt );
+    free( p_seektable );
+    p_sys->i_start = stream_Tell( p_demux->s );
+    
+#if 0
+    /* Parse possible id3 header */
+    if( ( p_id3 = module_Need( p_demux, "meta reader", NULL, 0 ) ) )
+    {
+        p_sys->p_meta = (vlc_meta_t *)p_demux->p_private;
+        p_demux->p_private = NULL;
+        module_Unneed( p_demux, p_id3 );
+    }
+
+    if( !p_sys->p_meta )
+        p_sys->p_meta = vlc_meta_New();
+#endif
+    return VLC_SUCCESS;
+}
+
+/*****************************************************************************
+ * Close: frees unused data
+ *****************************************************************************/
+static void Close( vlc_object_t * p_this )
+{
+    demux_t        *p_demux = (demux_t*)p_this;
+    demux_sys_t    *p_sys = p_demux->p_sys;
+
+    free( p_sys );
+}
+
+/*****************************************************************************
+ * Demux:
+ *****************************************************************************
+ * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
+ *****************************************************************************/
+static int Demux( demux_t *p_demux )
+{
+    demux_sys_t *p_sys = p_demux->p_sys;
+    block_t     *p_data;
+
+    if( p_sys->i_currentframe > p_sys->i_totalframes )
+        return 0;
+
+    p_data = stream_Block( p_demux->s, p_sys->pi_seektable[p_sys->i_currentframe] );
+    if( p_data == NULL ) return 0;
+    p_data->i_dts = p_data->i_pts = (int64_t)(1 + I64C(1000000) * p_sys->i_currentframe) * TTA_FRAMETIME;
+
+    p_sys->i_currentframe++;
+
+    es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_data->i_dts );
+    es_out_Send( p_demux->out, p_sys->p_es, p_data );
+
+    return 1;
+}
+
+/*****************************************************************************
+ * Control:
+ *****************************************************************************/
+static int Control( demux_t *p_demux, int i_query, va_list args )
+{
+    demux_sys_t *p_sys = p_demux->p_sys;
+    double   f, *pf;
+    int64_t i64, *pi64;
+    vlc_meta_t *p_meta;
+
+    switch( i_query )
+    {
+        case DEMUX_GET_POSITION:
+            pf = (double*) va_arg( args, double* );
+            i64 = stream_Size( p_demux->s ) - p_sys->i_start;
+            if( i64 > 0 )
+            {
+                *pf = (double)(stream_Tell( p_demux->s ) - p_sys->i_start )/ (double)i64;
+            }
+            else
+            {
+                *pf = 0.0;
+            }
+            return VLC_SUCCESS;
+
+        case DEMUX_SET_POSITION:
+            f = (double)va_arg( args, double );
+            i64 = (int64_t)(f * (stream_Size( p_demux->s ) - p_sys->i_start));
+            es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
+            if( i64 > 0 )
+            {
+                int64_t tmp = 0;
+                int     i;
+                for( i=0; i < p_sys->i_totalframes && tmp+p_sys->pi_seektable[i] < i64; i++)
+                {
+                    tmp += p_sys->pi_seektable[i];
+                }
+                stream_Seek( p_demux->s, tmp+p_sys->i_start );
+                p_sys->i_currentframe = i;
+                return VLC_SUCCESS;
+            }
+            return VLC_EGENERIC;
+         
+        case DEMUX_GET_LENGTH:
+            pi64 = (int64_t*)va_arg( args, int64_t * );
+            *pi64 = I64C(1000000) * p_sys->i_totalframes * TTA_FRAMETIME;
+            return VLC_SUCCESS;
+
+        case DEMUX_GET_TIME:
+            pi64 = (int64_t*)va_arg( args, int64_t * );
+            *pi64 = I64C(1000000) * p_sys->i_currentframe * TTA_FRAMETIME;
+            return VLC_SUCCESS;
+            
+        default:
+            return VLC_EGENERIC;
+    }
+}
+