X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=modules%2Fdemux%2Frawdv.c;h=627220aee6f157175939ddaa62a21ddbdf82e485;hb=59da25707ad2c660c0327d6edb59824729922710;hp=b4e122e9c8fbfffd7bbb1bb8a955272b802428f3;hpb=186e68fd739bc6a2fedf4ffda45c5eee23ee3819;p=vlc diff --git a/modules/demux/rawdv.c b/modules/demux/rawdv.c index b4e122e9c8..627220aee6 100644 --- a/modules/demux/rawdv.c +++ b/modules/demux/rawdv.c @@ -1,16 +1,17 @@ /***************************************************************************** - * rawdv.c : raw dv input module for vlc + * rawdv.c : raw DV input module for vlc ***************************************************************************** - * Copyright (C) 2001 VideoLAN - * $Id: rawdv.c,v 1.9 2003/08/17 23:02:52 fenrir Exp $ + * Copyright (C) 2001-2007 the VideoLAN team + * $Id$ * * Authors: Gildas Bazin + * Paul Corke * * 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 @@ -18,29 +19,49 @@ * * 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. + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA. *****************************************************************************/ /***************************************************************************** * Preamble *****************************************************************************/ -#include /* malloc(), free() */ -#include /* strdup() */ -#include -#include -#include +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include +#include +#include + +/***************************************************************************** + * Module descriptor + *****************************************************************************/ +#define HURRYUP_TEXT N_( "Hurry up" ) +#define HURRYUP_LONGTEXT N_( "The demuxer will advance timestamps if the " \ + "input can't keep up with the rate." ) + +static int Open ( vlc_object_t * ); +static void Close( vlc_object_t * ); -#include +vlc_module_begin(); + set_shortname( "DV" ); + set_description( N_("DV (Digital Video) demuxer") ); + set_capability( "demux", 3 ); + set_category( CAT_INPUT ); + set_subcategory( SUBCAT_INPUT_DEMUX ); + add_bool( "rawdv-hurry-up", 0, NULL, HURRYUP_TEXT, HURRYUP_LONGTEXT, false ); + set_callbacks( Open, Close ); + add_shortcut( "rawdv" ); +vlc_module_end(); -#include /* BITMAPINFOHEADER, WAVEFORMATEX */ /***************************************************************************** A little bit of background information (copied over from libdv glossary). - DIF block: A block of 80 bytes. This is the basic data framing unit of the DVC tape format, analogous to sectors of hard disc. - + - Video Section: Each DIF sequence contains a video section, consisting of 135 DIF blocks, which are further subdivided into Video Segments. @@ -81,71 +102,59 @@ struct demux_sys_t { int frame_size; - es_descriptor_t *p_video_es; - es_descriptor_t *p_audio_es; + es_out_id_t *p_es_video; + es_format_t fmt_video; - /* codec specific stuff */ - BITMAPINFOHEADER *p_bih; - WAVEFORMATEX *p_wf; + es_out_id_t *p_es_audio; + es_format_t fmt_audio; + int i_dsf; double f_rate; int i_bitrate; /* program clock reference (in units of 90kHz) */ mtime_t i_pcr; + bool b_hurry_up; }; /***************************************************************************** * Local prototypes *****************************************************************************/ -static int Activate ( vlc_object_t * ); -static void Deactivate( vlc_object_t * ); -static int Demux ( input_thread_t * ); +static int Demux( demux_t * ); +static int Control( demux_t *, int i_query, va_list args ); -/***************************************************************************** - * Module descriptor - *****************************************************************************/ -vlc_module_begin(); - set_description( _("raw dv demuxer") ); - set_capability( "demux", 2 ); - set_callbacks( Activate, NULL ); - add_shortcut( "rawdv" ); -vlc_module_end(); +static block_t *dv_extract_audio( demux_t *p_demux, + block_t* p_frame_block ); /***************************************************************************** - * Activate: initializes raw dv demux structures + * Open: initializes raw DV demux structures *****************************************************************************/ -static int Activate( vlc_object_t * p_this ) +static int Open( vlc_object_t * p_this ) { - input_thread_t *p_input = (input_thread_t *)p_this; - byte_t *p_peek, *p_peek_backup; - uint32_t i_dword; - demux_sys_t *p_rawdv; - dv_header_t dv_header; - dv_id_t dv_id; - char *psz_ext; - - /* It isn't easy to recognize a raw dv stream. The chances that we'll - * mistake a stream from another type for a raw dv stream are too high, so + demux_t *p_demux = (demux_t*)p_this; + demux_sys_t *p_sys; + + const uint8_t *p_peek, *p_peek_backup; + + uint32_t i_dword; + dv_header_t dv_header; + dv_id_t dv_id; + + /* It isn't easy to recognize a raw DV stream. The chances that we'll + * mistake a stream from another type for a raw DV stream are too high, so * we'll rely on the file extension to trigger this demux. Alternatively, * it is possible to force this demux. */ - /* Check for dv file extension */ - psz_ext = strrchr ( p_input->psz_name, '.' ); - if( ( !psz_ext || strcasecmp( psz_ext, ".dv") )&& - ( !p_input->psz_demux || strcmp(p_input->psz_demux, "rawdv") ) ) - { - return -1; - } - - p_input->pf_demux = Demux; + /* Check for DV file extension */ + if( !demux_IsPathExtension( p_demux, ".dv" ) && !p_demux->b_force ) + return VLC_EGENERIC; - /* Have a peep at the show. */ - if( input_Peek(p_input, &p_peek, DV_PAL_FRAME_SIZE) < DV_NTSC_FRAME_SIZE ) + if( stream_Peek( p_demux->s, &p_peek, DV_PAL_FRAME_SIZE ) < + DV_NTSC_FRAME_SIZE ) { /* Stream too short ... */ - msg_Err( p_input, "cannot peek()" ); - return -1; + msg_Err( p_demux, "cannot peek()" ); + return VLC_EGENERIC; } p_peek_backup = p_peek; @@ -162,8 +171,8 @@ static int Activate( vlc_object_t * p_this ) if( dv_id.sct != 0 ) { - msg_Warn( p_input, "not a raw dv stream header" ); - return -1; + msg_Warn( p_demux, "not a raw DV stream header" ); + return VLC_EGENERIC; } /* fill in the dv_header_t structure */ @@ -171,8 +180,8 @@ static int Activate( vlc_object_t * p_this ) i_dword <<= 1; if( i_dword >> (32 - 1) ) /* incorrect bit */ { - msg_Warn( p_input, "incorrect bit" ); - return -1; + msg_Warn( p_demux, "incorrect bit" ); + return VLC_EGENERIC; } i_dword = GetDWBE( p_peek ); p_peek += 4; @@ -193,138 +202,80 @@ static int Activate( vlc_object_t * p_this ) p_peek += 72; /* skip rest of DIF block */ + /* Set p_input field */ + p_demux->pf_demux = Demux; + p_demux->pf_control = Control; + p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) ); + if( !p_sys ) + return VLC_ENOMEM; - /* Setup the structures for our demuxer */ - if( !( p_rawdv = malloc( sizeof( demux_sys_t ) ) ) ) - { - msg_Err( p_input, "out of memory" ); - return -1; - } - memset( p_rawdv, 0, sizeof( demux_sys_t ) ); - p_rawdv->p_bih = NULL; - p_rawdv->p_wf = NULL; - p_input->p_demux_data = p_rawdv; + p_sys->b_hurry_up = var_CreateGetBool( p_demux, "rawdv-hurry-up" ); + msg_Dbg( p_demux, "Realtime DV Source: %s", (p_sys->b_hurry_up)?"Yes":"No" ); - p_rawdv->p_bih = (BITMAPINFOHEADER *) malloc( sizeof(BITMAPINFOHEADER) ); - if( !p_rawdv->p_bih ) - { - msg_Err( p_input, "out of memory" ); - goto error; - } - p_rawdv->p_bih->biSize = sizeof(BITMAPINFOHEADER); - p_rawdv->p_bih->biCompression = VLC_FOURCC( 'd','v','s','d' ); - p_rawdv->p_bih->biSize = 40; - p_rawdv->p_bih->biWidth = 720; - p_rawdv->p_bih->biHeight = dv_header.dsf ? 576 : 480; - p_rawdv->p_bih->biPlanes = 1; - p_rawdv->p_bih->biBitCount = 24; - p_rawdv->p_bih->biSizeImage = - p_rawdv->p_bih->biWidth * p_rawdv->p_bih->biHeight - * (p_rawdv->p_bih->biBitCount >> 3); - - /* Properties of our video */ - if( dv_header.dsf ) - { - p_rawdv->frame_size = 12 * 150 * 80; - p_rawdv->f_rate = 25; - } - else - { - p_rawdv->frame_size = 10 * 150 * 80; - p_rawdv->f_rate = 29.97; - } + p_sys->i_dsf = dv_header.dsf; + p_sys->frame_size = dv_header.dsf ? 12 * 150 * 80 : 10 * 150 * 80; + p_sys->f_rate = dv_header.dsf ? 25 : 29.97; - /* Audio stuff */ -#if 0 - p_peek = p_peek_backup + 80*6+80*16*3 + 3; /* beginning of AAUX pack */ + p_sys->i_pcr = 1; + p_sys->p_es_video = NULL; + p_sys->p_es_audio = NULL; - if( *p_peek != 0x50 || *p_peek != 0x51 ) - { - msg_Err( p_input, "AAUX should begin with 0x50" ); - } -#endif - - p_rawdv->p_wf = (WAVEFORMATEX *)malloc( sizeof(WAVEFORMATEX) ); - if( !p_rawdv->p_wf ) - { - msg_Err( p_input, "out of memory" ); - goto error; - } - - p_rawdv->p_wf->wFormatTag = 0; - p_rawdv->p_wf->nChannels = 2; - p_rawdv->p_wf->nSamplesPerSec = 44100; /* FIXME */ - p_rawdv->p_wf->nAvgBytesPerSec = p_rawdv->f_rate * p_rawdv->frame_size; - p_rawdv->p_wf->nBlockAlign = p_rawdv->frame_size; - p_rawdv->p_wf->wBitsPerSample = 16; - p_rawdv->p_wf->cbSize = 0; + p_sys->i_bitrate = 0; + es_format_Init( &p_sys->fmt_video, VIDEO_ES, VLC_FOURCC('d','v','s','d') ); + p_sys->fmt_video.video.i_width = 720; + p_sys->fmt_video.video.i_height= dv_header.dsf ? 576 : 480;; + /* FIXME FIXME */ +#if 0 /* necessary because input_SplitBuffer() will only get * INPUT_DEFAULT_BUFSIZE bytes at a time. */ - p_input->i_bufsize = p_rawdv->frame_size; + p_input->i_bufsize = p_sys->frame_size; +#endif - /* Create one program */ - vlc_mutex_lock( &p_input->stream.stream_lock ); - if( input_InitStream( p_input, 0 ) == -1) - { - vlc_mutex_unlock( &p_input->stream.stream_lock ); - msg_Err( p_input, "cannot init stream" ); - goto error; - } - if( input_AddProgram( p_input, 0, 0) == NULL ) + p_sys->p_es_video = es_out_Add( p_demux->out, &p_sys->fmt_video ); + + /* Audio stuff */ + p_peek = p_peek_backup + 80*6+80*16*3 + 3; /* beginning of AAUX pack */ + if( *p_peek == 0x50 ) { - vlc_mutex_unlock( &p_input->stream.stream_lock ); - msg_Err( p_input, "cannot add program" ); - goto error; + es_format_Init( &p_sys->fmt_audio, AUDIO_ES, + VLC_FOURCC('a','r','a','w') ); + + p_sys->fmt_audio.audio.i_channels = 2; + switch( (p_peek[4] >> 3) & 0x07 ) + { + case 0: + p_sys->fmt_audio.audio.i_rate = 48000; + break; + case 1: + p_sys->fmt_audio.audio.i_rate = 44100; + break; + case 2: + default: + p_sys->fmt_audio.audio.i_rate = 32000; + break; + } + + /* 12 bits non-linear will be converted to 16 bits linear */ + p_sys->fmt_audio.audio.i_bitspersample = 16; + + p_sys->p_es_audio = es_out_Add( p_demux->out, &p_sys->fmt_audio ); } - p_input->stream.p_selected_program = p_input->stream.pp_programs[0]; - p_input->stream.i_mux_rate = p_rawdv->frame_size * p_rawdv->f_rate; - vlc_mutex_unlock( &p_input->stream.stream_lock ); - - /* Add video stream */ - vlc_mutex_lock( &p_input->stream.stream_lock ); - p_rawdv->p_video_es = input_AddES( p_input, - p_input->stream.p_selected_program, - 1, VIDEO_ES, NULL, 0 ); - p_rawdv->p_video_es->i_stream_id = 0; - p_rawdv->p_video_es->i_fourcc = VLC_FOURCC( 'd','v','s','d' ); - p_rawdv->p_video_es->p_bitmapinfoheader = (void *)p_rawdv->p_bih; - input_SelectES( p_input, p_rawdv->p_video_es ); - vlc_mutex_unlock( &p_input->stream.stream_lock ); - - /* Add audio stream */ - vlc_mutex_lock( &p_input->stream.stream_lock ); - p_rawdv->p_audio_es = input_AddES( p_input, - p_input->stream.p_selected_program, - 2, AUDIO_ES, NULL, 0 ); - p_rawdv->p_audio_es->i_stream_id = 1; - p_rawdv->p_audio_es->i_fourcc = VLC_FOURCC( 'd','v','a','u' ); - p_rawdv->p_audio_es->p_waveformatex = (void *)p_rawdv->p_wf; - input_SelectES( p_input, p_rawdv->p_audio_es ); - vlc_mutex_unlock( &p_input->stream.stream_lock ); - - /* Init pcr */ - p_rawdv->i_pcr = 0; - - return 0; - - error: - if( p_rawdv->p_bih ) free( p_rawdv->p_bih ); - if( p_rawdv->p_wf ) free( p_rawdv->p_wf ); - Deactivate( (vlc_object_t *)p_input ); - return -1; + + return VLC_SUCCESS; } /***************************************************************************** - * Deactivate: frees unused data + * Close: frees unused data *****************************************************************************/ -static void Deactivate( vlc_object_t *p_this ) +static void Close( vlc_object_t *p_this ) { - input_thread_t *p_input = (input_thread_t *)p_this; - demux_sys_t *p_rawdv = (demux_sys_t *)p_input->p_demux_data; + demux_t *p_demux = (demux_t*)p_this; + demux_sys_t *p_sys = p_demux->p_sys; - free( p_rawdv ); + var_Destroy( p_demux, "rawdv-hurry-up"); + free( p_sys ); } /***************************************************************************** @@ -332,105 +283,212 @@ static void Deactivate( vlc_object_t *p_this ) ***************************************************************************** * Returns -1 in case of error, 0 in case of EOF, 1 otherwise *****************************************************************************/ -static int Demux( input_thread_t * p_input ) +static int Demux( demux_t *p_demux ) { - demux_sys_t *p_rawdv = (demux_sys_t *)p_input->p_demux_data; - pes_packet_t *p_pes = NULL; - pes_packet_t *p_audio_pes = NULL; - data_packet_t *p_data; - ssize_t i_read; + demux_sys_t *p_sys = p_demux->p_sys; + block_t *p_block; + bool b_audio = false; + + if( p_sys->b_hurry_up ) + { + /* 3 frames */ + p_sys->i_pcr = mdate() + (p_sys->i_dsf ? 120000 : 90000); + } - if( p_input->stream.p_selected_program->i_synchro_state == SYNCHRO_REINIT ) + /* Call the pace control */ + es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_pcr ); + p_block = stream_Block( p_demux->s, p_sys->frame_size ); + if( p_block == NULL ) { - off_t i_pos; + /* EOF */ + return 0; + } - msg_Warn( p_input, "synchro reinit" ); + if( p_sys->p_es_audio ) + { + es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE, + p_sys->p_es_audio, &b_audio ); + } - /* If the user tried to seek in the stream, we need to make sure - * the new position is at a DIF block boundary. */ - vlc_mutex_lock( &p_input->stream.stream_lock ); - i_pos= p_input->stream.p_selected_area->i_tell; - vlc_mutex_unlock( &p_input->stream.stream_lock ); + p_block->i_dts = + p_block->i_pts = p_sys->i_pcr; - if( (i_pos % p_rawdv->frame_size) && - p_input->stream.b_seekable && - p_input->stream.i_method == INPUT_METHOD_FILE ) + if( b_audio ) + { + block_t *p_audio_block = dv_extract_audio( p_demux, p_block ); + if( p_audio_block ) { - p_input->pf_seek( p_input, (i_pos / p_rawdv->frame_size) - * p_rawdv->frame_size ); - input_AccessReinit( p_input ); + p_audio_block->i_pts = + p_audio_block->i_dts = p_sys->i_pcr; + es_out_Send( p_demux->out, p_sys->p_es_audio, p_audio_block ); } } - /* Call the pace control */ - input_ClockManageRef( p_input, p_input->stream.p_selected_program, - p_rawdv->i_pcr ); + es_out_Send( p_demux->out, p_sys->p_es_video, p_block ); - i_read = input_SplitBuffer( p_input, &p_data, p_rawdv->frame_size ); - if( i_read <= 0 ) + if( !p_sys->b_hurry_up ) { - return i_read; + p_sys->i_pcr += ( INT64_C(1000000) / p_sys->f_rate ); } - /* Build video PES packet */ - if( p_rawdv->p_video_es->p_decoder_fifo ) - { - p_pes = input_NewPES( p_input->p_method_data ); - if( p_pes == NULL ) - { - msg_Err( p_input, "out of memory" ); - input_DeletePacket( p_input->p_method_data, p_data ); - return -1; - } + return 1; +} - p_pes->i_rate = p_input->stream.control.i_rate; - p_pes->p_first = p_pes->p_last = p_data; - p_pes->i_pes_size = i_read; - p_pes->i_nb_data = 1; - p_pes->i_pts = - input_ClockGetTS( p_input, p_input->stream.p_selected_program, - p_rawdv->i_pcr ); +/***************************************************************************** + * Control: + *****************************************************************************/ +static int Control( demux_t *p_demux, int i_query, va_list args ) +{ + demux_sys_t *p_sys = p_demux->p_sys; + + /* XXX: DEMUX_SET_TIME is precise here */ + return demux_vaControlHelper( p_demux->s, + 0, -1, + p_sys->frame_size * p_sys->f_rate * 8, + p_sys->frame_size, i_query, args ); +} + +static const uint16_t dv_audio_shuffle525[10][9] = { + { 0, 30, 60, 20, 50, 80, 10, 40, 70 }, /* 1st channel */ + { 6, 36, 66, 26, 56, 86, 16, 46, 76 }, + { 12, 42, 72, 2, 32, 62, 22, 52, 82 }, + { 18, 48, 78, 8, 38, 68, 28, 58, 88 }, + { 24, 54, 84, 14, 44, 74, 4, 34, 64 }, + + { 1, 31, 61, 21, 51, 81, 11, 41, 71 }, /* 2nd channel */ + { 7, 37, 67, 27, 57, 87, 17, 47, 77 }, + { 13, 43, 73, 3, 33, 63, 23, 53, 83 }, + { 19, 49, 79, 9, 39, 69, 29, 59, 89 }, + { 25, 55, 85, 15, 45, 75, 5, 35, 65 }, +}; + +static const uint16_t dv_audio_shuffle625[12][9] = { + { 0, 36, 72, 26, 62, 98, 16, 52, 88}, /* 1st channel */ + { 6, 42, 78, 32, 68, 104, 22, 58, 94}, + { 12, 48, 84, 2, 38, 74, 28, 64, 100}, + { 18, 54, 90, 8, 44, 80, 34, 70, 106}, + { 24, 60, 96, 14, 50, 86, 4, 40, 76}, + { 30, 66, 102, 20, 56, 92, 10, 46, 82}, + + { 1, 37, 73, 27, 63, 99, 17, 53, 89}, /* 2nd channel */ + { 7, 43, 79, 33, 69, 105, 23, 59, 95}, + { 13, 49, 85, 3, 39, 75, 29, 65, 101}, + { 19, 55, 91, 9, 45, 81, 35, 71, 107}, + { 25, 61, 97, 15, 51, 87, 5, 41, 77}, + { 31, 67, 103, 21, 57, 93, 11, 47, 83}, +}; + +static inline uint16_t dv_audio_12to16( uint16_t sample ) +{ + uint16_t shift, result; + + sample = (sample < 0x800) ? sample : sample | 0xf000; + shift = (sample & 0xf00) >> 8; + + if (shift < 0x2 || shift > 0xd) { + result = sample; + } else if (shift < 0x8) { + shift--; + result = (sample - (256 * shift)) << shift; + } else { + shift = 0xe - shift; + result = ((sample + ((256 * shift) + 1)) << shift) - 1; } - /* Do the same for audio */ - if( p_rawdv->p_audio_es->p_decoder_fifo ) + return result; +} + +static block_t *dv_extract_audio( demux_t *p_demux, + block_t* p_frame_block ) +{ + demux_sys_t *p_sys = p_demux->p_sys; + block_t *p_block; + uint8_t *p_frame, *p_buf; + int i_audio_quant, i_samples, i_size, i_half_ch; + const uint16_t (*audio_shuffle)[9]; + int i, j, d, of; + uint16_t lc; + + /* Beginning of AAUX pack */ + p_buf = p_frame_block->p_buffer + 80*6+80*16*3 + 3; + if( *p_buf != 0x50 ) return NULL; + + i_audio_quant = p_buf[4] & 0x07; /* 0 - 16bit, 1 - 12bit */ + if( i_audio_quant > 1 ) { - p_audio_pes = input_NewPES( p_input->p_method_data ); - if( p_audio_pes == NULL ) - { - msg_Err( p_input, "out of memory" ); - input_DeletePacket( p_input->p_method_data, p_data ); - return -1; - } - p_audio_pes->i_rate = p_input->stream.control.i_rate; - - if( p_rawdv->p_video_es->p_decoder_fifo ) - p_audio_pes->p_first = p_audio_pes->p_last = - input_ShareBuffer( p_input->p_method_data, p_data->p_buffer ); - else - p_audio_pes->p_first = p_audio_pes->p_last = p_data; - - p_audio_pes->p_first->p_next = p_data->p_next; - p_audio_pes->p_first->p_payload_start = p_data->p_payload_start; - p_audio_pes->p_first->p_payload_end = p_data->p_payload_end; - p_audio_pes->i_pes_size = i_read; - p_audio_pes->i_nb_data = 1; - p_audio_pes->i_pts = - input_ClockGetTS( p_input, p_input->stream.p_selected_program, - p_rawdv->i_pcr ); + msg_Dbg( p_demux, "unsupported quantization for DV audio"); + return NULL; } - /* Decode PES packets if stream is selected */ - if( p_rawdv->p_video_es->p_decoder_fifo ) - input_DecodePES( p_rawdv->p_video_es->p_decoder_fifo, p_pes ); - if( p_rawdv->p_audio_es->p_decoder_fifo ) - input_DecodePES( p_rawdv->p_audio_es->p_decoder_fifo, p_audio_pes ); + i_samples = p_buf[1] & 0x3f; /* samples in this frame - min samples */ + switch( (p_buf[4] >> 3) & 0x07 ) + { + case 0: + i_size = p_sys->i_dsf ? 1896 : 1580; + break; + case 1: + i_size = p_sys->i_dsf ? 1742 : 1452; + break; + case 2: + default: + i_size = p_sys->i_dsf ? 1264 : 1053; + break; + } + i_size = (i_size + i_samples) * 4; /* 2ch, 2bytes */ - p_rawdv->i_pcr += ( 90000 / p_rawdv->f_rate ); + p_block = block_New( p_demux, i_size ); - if( !p_rawdv->p_video_es->p_decoder_fifo && - !p_rawdv->p_audio_es->p_decoder_fifo ) - input_DeletePacket( p_input->p_method_data, p_data ); + /* for each DIF segment */ + p_frame = p_frame_block->p_buffer; + audio_shuffle = p_sys->i_dsf ? dv_audio_shuffle625 : dv_audio_shuffle525; + i_half_ch = (p_sys->i_dsf ? 12 : 10)/2; + for( i = 0; i < (p_sys->i_dsf ? 12 : 10); i++ ) + { + p_frame += 6 * 80; /* skip DIF segment header */ - return 1; + if( i_audio_quant == 1 && i == i_half_ch ) break; + + for( j = 0; j < 9; j++ ) + { + for( d = 8; d < 80; d += 2 ) + { + if( i_audio_quant == 0 ) + { + /* 16bit quantization */ + of = audio_shuffle[i][j] + (d - 8) / 2 * + (p_sys->i_dsf ? 108 : 90); + + if( of * 2 >= i_size ) continue; + + /* big endian */ + p_block->p_buffer[of*2] = p_frame[d+1]; + p_block->p_buffer[of*2+1] = p_frame[d]; + + if( p_block->p_buffer[of*2+1] == 0x80 && + p_block->p_buffer[of*2] == 0x00 ) + p_block->p_buffer[of*2+1] = 0; + } + else + { + /* 12bit quantization */ + lc = ((uint16_t)p_frame[d] << 4) | + ((uint16_t)p_frame[d+2] >> 4); + lc = (lc == 0x800 ? 0 : dv_audio_12to16(lc)); + + of = audio_shuffle[i][j] + (d - 8) / 3 * + (p_sys->i_dsf ? 108 : 90); + if( of*2 >= i_size ) continue; + + /* big endian */ + p_block->p_buffer[of*2] = lc & 0xff; + p_block->p_buffer[of*2+1] = lc >> 8; + ++d; + } + } + + p_frame += 16 * 80; /* 15 Video DIFs + 1 Audio DIF */ + } + } + + return p_block; }