X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=modules%2Fcodec%2Fdts.c;h=7787cf4d29be93aedc693e7f4079ab5ab5655d72;hb=1f1e1106101bc913dd3f2f4ef3789a4cad16bf93;hp=9c54c32230a570645ddcea8894109b33265ab8dd;hpb=f2dd0b846b36eaed20264e6c6a8259306e1b1c84;p=vlc diff --git a/modules/codec/dts.c b/modules/codec/dts.c index 9c54c32230..7787cf4d29 100644 --- a/modules/codec/dts.c +++ b/modules/codec/dts.c @@ -1,10 +1,11 @@ /***************************************************************************** - * dts.c: DTS basic parser + * dts.c: parse DTS audio sync info and packetize the stream ***************************************************************************** - * Copyright (C) 2003 VideoLAN - * $Id: dts.c,v 1.3 2003/03/18 00:25:27 jlj Exp $ + * Copyright (C) 2003-2005 the VideoLAN team + * $Id$ * * Authors: Jon Lech Johansen + * Gildas Bazin * * 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 @@ -18,68 +19,92 @@ * * 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 -#include -#include /* memcpy() */ -#include +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif -#include -#include -#include +#include +#include +#include +#include +#include -#ifdef HAVE_UNISTD_H -# include -#endif +#define DTS_HEADER_SIZE 14 /***************************************************************************** - * dec_thread_t : decoder thread descriptor + * decoder_sys_t : decoder descriptor *****************************************************************************/ -typedef struct dec_thread_t +struct decoder_sys_t { - /* - * Thread properties - */ - vlc_thread_t thread_id; /* id for thread functions */ + /* Module mode */ + bool b_packetizer; /* * Input properties */ - decoder_fifo_t * p_fifo; /* stores the PES stream data */ - bit_stream_t bit_stream; + int i_state; + + block_bytestream_t bytestream; /* - * Output properties + * Common properties */ - aout_instance_t * p_aout; /* opaque */ - aout_input_t * p_aout_input; /* opaque */ - audio_sample_format_t output_format; -} dec_thread_t; + audio_date_t end_date; + + mtime_t i_pts; + + unsigned int i_bit_rate; + unsigned int i_frame_size; + unsigned int i_frame_length; + unsigned int i_rate; + unsigned int i_channels; + unsigned int i_channels_conf; +}; + +enum { + + STATE_NOSYNC, + STATE_SYNC, + STATE_HEADER, + STATE_NEXT_SYNC, + STATE_GET_DATA, + STATE_SEND_DATA +}; /**************************************************************************** * Local prototypes ****************************************************************************/ -static int OpenDecoder ( vlc_object_t * ); -static int RunDecoder ( decoder_fifo_t * ); +static int OpenDecoder ( vlc_object_t * ); +static int OpenPacketizer( vlc_object_t * ); +static void CloseDecoder ( vlc_object_t * ); +static void *DecodeBlock ( decoder_t *, block_t ** ); -static void EndThread ( dec_thread_t * ); +static inline int SyncCode( const uint8_t * ); +static int SyncInfo ( const uint8_t *, unsigned int *, unsigned int *, + unsigned int *, unsigned int *, unsigned int * ); -static int SyncInfo ( const byte_t *, unsigned int *, - unsigned int *, unsigned int *, - unsigned int * ); +static uint8_t *GetOutBuffer ( decoder_t *, void ** ); +static aout_buffer_t *GetAoutBuffer( decoder_t * ); +static block_t *GetSoutBuffer( decoder_t * ); /***************************************************************************** * Module descriptor *****************************************************************************/ vlc_module_begin(); - set_description( _("DTS parser") ); + set_description( N_("DTS parser") ); set_capability( "decoder", 100 ); - set_callbacks( OpenDecoder, NULL ); + set_callbacks( OpenDecoder, CloseDecoder ); + + add_submodule(); + set_description( N_("DTS audio packetizer") ); + set_capability( "packetizer", 10 ); + set_callbacks( OpenPacketizer, CloseDecoder ); vlc_module_end(); /***************************************************************************** @@ -87,349 +112,599 @@ vlc_module_end(); *****************************************************************************/ static int OpenDecoder( vlc_object_t *p_this ) { - decoder_fifo_t *p_fifo = (decoder_fifo_t*) p_this; + decoder_t *p_dec = (decoder_t*)p_this; + decoder_sys_t *p_sys; - if( p_fifo->i_fourcc != VLC_FOURCC('d','t','s',' ') - && p_fifo->i_fourcc != VLC_FOURCC('d','t','s','b') ) + if( p_dec->fmt_in.i_codec != VLC_FOURCC('d','t','s',' ') + && p_dec->fmt_in.i_codec != VLC_FOURCC('d','t','s','b') ) { return VLC_EGENERIC; } - p_fifo->pf_run = RunDecoder; + /* Allocate the memory needed to store the decoder's structure */ + if( ( p_dec->p_sys = p_sys = + (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL ) + return VLC_ENOMEM; + + /* Misc init */ + p_sys->b_packetizer = false; + p_sys->i_state = STATE_NOSYNC; + aout_DateSet( &p_sys->end_date, 0 ); + + p_sys->bytestream = block_BytestreamInit(); + + /* Set output properties */ + p_dec->fmt_out.i_cat = AUDIO_ES; + p_dec->fmt_out.i_codec = VLC_FOURCC('d','t','s',' '); + p_dec->fmt_out.audio.i_rate = 0; /* So end_date gets initialized */ + + /* Set callback */ + p_dec->pf_decode_audio = (aout_buffer_t *(*)(decoder_t *, block_t **)) + DecodeBlock; + p_dec->pf_packetize = (block_t *(*)(decoder_t *, block_t **)) + DecodeBlock; + return VLC_SUCCESS; } +static int OpenPacketizer( vlc_object_t *p_this ) +{ + decoder_t *p_dec = (decoder_t*)p_this; + + int i_ret = OpenDecoder( p_this ); + + if( i_ret == VLC_SUCCESS ) p_dec->p_sys->b_packetizer = true; + + return i_ret; +} + /**************************************************************************** - * RunDecoder: the whole thing + * DecodeBlock: the whole thing **************************************************************************** * This function is called just after the thread is launched. ****************************************************************************/ -static int RunDecoder( decoder_fifo_t *p_fifo ) +static void *DecodeBlock( decoder_t *p_dec, block_t **pp_block ) { - dec_thread_t * p_dec; - audio_date_t end_date; - - /* Allocate the memory needed to store the thread's structure */ - p_dec = malloc( sizeof(dec_thread_t) ); - if( p_dec == NULL ) - { - msg_Err( p_fifo, "out of memory" ); - DecoderError( p_fifo ); - return -1; - } - - /* Initialize the thread properties */ - p_dec->p_aout = NULL; - p_dec->p_aout_input = NULL; - p_dec->p_fifo = p_fifo; - p_dec->output_format.i_format = VLC_FOURCC('d','t','s',' '); + decoder_sys_t *p_sys = p_dec->p_sys; + uint8_t p_header[DTS_HEADER_SIZE]; + uint8_t *p_buf; + void *p_out_buffer; - aout_DateSet( &end_date, 0 ); + if( !pp_block || !*pp_block ) return NULL; - /* Init the bitstream */ - if( InitBitstream( &p_dec->bit_stream, p_dec->p_fifo, - NULL, NULL ) != VLC_SUCCESS ) + if( (*pp_block)->i_flags&(BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) ) { - msg_Err( p_fifo, "cannot initialize bitstream" ); - DecoderError( p_fifo ); - free( p_dec ); - return -1; + if( (*pp_block)->i_flags&BLOCK_FLAG_CORRUPTED ) + { + p_sys->i_state = STATE_NOSYNC; + block_BytestreamFlush( &p_sys->bytestream ); + } +// aout_DateSet( &p_sys->end_date, 0 ); + block_Release( *pp_block ); + return NULL; } - /* Decoder thread's main loop */ - while( !p_dec->p_fifo->b_die && !p_dec->p_fifo->b_error ) + if( !aout_DateGet( &p_sys->end_date ) && !(*pp_block)->i_pts ) { - int i; - mtime_t pts; - byte_t p_header[10]; - - unsigned int i_rate; - unsigned int i_bit_rate; - unsigned int i_frame_size; - unsigned int i_frame_length; - unsigned int i_original_channels; + /* We've just started the stream, wait for the first PTS. */ + block_Release( *pp_block ); + return NULL; + } - aout_buffer_t * p_buffer = NULL; + block_BytestreamPush( &p_sys->bytestream, *pp_block ); - for( i = 0; i < 3; i++ ) + while( 1 ) + { + switch( p_sys->i_state ) { - RealignBits( &p_dec->bit_stream ); - while( (ShowBits( &p_dec->bit_stream, 32 ) ) != 0x7ffe8001 && - (!p_dec->p_fifo->b_die) && (!p_dec->p_fifo->b_error) ) + case STATE_NOSYNC: + /* Look for sync code - should be 0x7ffe8001 */ + while( block_PeekBytes( &p_sys->bytestream, p_header, 6 ) + == VLC_SUCCESS ) { - RemoveBits( &p_dec->bit_stream, 8 ); - } - if( p_dec->p_fifo->b_die || p_dec->p_fifo->b_error ) break; - - if( i == 0 ) - { - /* Set the Presentation Time Stamp */ - NextPTS( &p_dec->bit_stream, &pts, NULL ); - if( pts != 0 && pts != aout_DateGet( &end_date ) ) + if( SyncCode( p_header ) == VLC_SUCCESS ) { - aout_DateSet( &end_date, pts ); + p_sys->i_state = STATE_SYNC; + break; } + block_SkipByte( &p_sys->bytestream ); } + if( p_sys->i_state != STATE_SYNC ) + { + block_BytestreamFlush( &p_sys->bytestream ); - /* Get DTS frame header */ - GetChunk( &p_dec->bit_stream, p_header, 10 ); - if( p_dec->p_fifo->b_die || p_dec->p_fifo->b_error ) break; + /* Need more data */ + return NULL; + } - i_frame_size = SyncInfo( p_header, &i_original_channels, &i_rate, - &i_bit_rate, &i_frame_length ); - if( !i_frame_size ) + case STATE_SYNC: + /* New frame, set the Presentation Time Stamp */ + p_sys->i_pts = p_sys->bytestream.p_block->i_pts; + if( p_sys->i_pts != 0 && + p_sys->i_pts != aout_DateGet( &p_sys->end_date ) ) { - msg_Warn( p_dec->p_fifo, "dts_syncinfo failed" ); - i--; continue; + aout_DateSet( &p_sys->end_date, p_sys->i_pts ); } + p_sys->i_state = STATE_HEADER; - if( i == 0 ) + case STATE_HEADER: + /* Get DTS frame header (DTS_HEADER_SIZE bytes) */ + if( block_PeekBytes( &p_sys->bytestream, p_header, + DTS_HEADER_SIZE ) != VLC_SUCCESS ) { - if( (p_dec->p_aout_input != NULL) && - ( (p_dec->output_format.i_rate != i_rate) - || (p_dec->output_format.i_original_channels - != i_original_channels) - || (p_dec->output_format.i_bytes_per_frame - != i_frame_size * 3) ) ) - { - /* Parameters changed - this should not happen. */ - aout_DecDelete( p_dec->p_aout, p_dec->p_aout_input ); - p_dec->p_aout_input = NULL; - } - - /* Creating the audio input if not created yet. */ - if( p_dec->p_aout_input == NULL ) - { - p_dec->output_format.i_rate = i_rate; - p_dec->output_format.i_original_channels - = i_original_channels; - p_dec->output_format.i_physical_channels - = i_original_channels & AOUT_CHAN_PHYSMASK; - p_dec->output_format.i_bytes_per_frame = i_frame_size * 3; - p_dec->output_format.i_frame_length = i_frame_length * 3; - aout_DateInit( &end_date, i_rate ); - p_dec->p_aout_input = aout_DecNew( p_dec->p_fifo, - &p_dec->p_aout, - &p_dec->output_format ); - - if( p_dec->p_aout_input == NULL ) - { - p_dec->p_fifo->b_error = 1; - break; - } - } + /* Need more data */ + return NULL; } - if( !aout_DateGet( &end_date ) ) + /* Check if frame is valid and get frame info */ + p_sys->i_frame_size = SyncInfo( p_header, + &p_sys->i_channels, + &p_sys->i_channels_conf, + &p_sys->i_rate, + &p_sys->i_bit_rate, + &p_sys->i_frame_length ); + if( !p_sys->i_frame_size ) { - byte_t p_junk[ i_frame_size ]; + msg_Dbg( p_dec, "emulated sync word" ); + block_SkipByte( &p_sys->bytestream ); + p_sys->i_state = STATE_NOSYNC; + break; + } + p_sys->i_state = STATE_NEXT_SYNC; + + case STATE_NEXT_SYNC: + /* TODO: If pp_block == NULL, flush the buffer without checking the + * next sync word */ - /* We've just started the stream, wait for the first PTS. */ - GetChunk( &p_dec->bit_stream, p_junk, i_frame_size - 10 ); - i--; continue; + /* Check if next expected frame contains the sync word */ + if( block_PeekOffsetBytes( &p_sys->bytestream, + p_sys->i_frame_size, p_header, 6 ) + != VLC_SUCCESS ) + { + /* Need more data */ + return NULL; } - if( i == 0 ) + if( SyncCode( p_header ) != VLC_SUCCESS ) { - p_buffer = aout_DecNewBuffer( p_dec->p_aout, - p_dec->p_aout_input, - i_frame_length * 3 ); - if( p_buffer == NULL ) - { - p_dec->p_fifo->b_error = 1; - break; - } - p_buffer->start_date = aout_DateGet( &end_date ); - p_buffer->end_date = aout_DateIncrement( &end_date, - i_frame_length * 3 ); + msg_Dbg( p_dec, "emulated sync word " + "(no sync on following frame): %2.2x%2.2x%2.2x%2.2x", + (int)p_header[0], (int)p_header[1], + (int)p_header[2], (int)p_header[3] ); + p_sys->i_state = STATE_NOSYNC; + block_SkipByte( &p_sys->bytestream ); + break; } + p_sys->i_state = STATE_SEND_DATA; + break; - /* Get the whole frame. */ - memcpy( p_buffer->p_buffer + (i * i_frame_size), p_header, 10 ); - GetChunk( &p_dec->bit_stream, - p_buffer->p_buffer + (i * i_frame_size) + 10, - i_frame_size - 10 ); - if( p_dec->p_fifo->b_die ) break; - } + case STATE_GET_DATA: + /* Make sure we have enough data. + * (Not useful if we went through NEXT_SYNC) */ + if( block_WaitBytes( &p_sys->bytestream, + p_sys->i_frame_size ) != VLC_SUCCESS ) + { + /* Need more data */ + return NULL; + } + p_sys->i_state = STATE_SEND_DATA; - if( p_dec->p_fifo->b_die || p_dec->p_fifo->b_error ) - { - if( p_buffer != NULL ) + case STATE_SEND_DATA: + if( !(p_buf = GetOutBuffer( p_dec, &p_out_buffer )) ) { - aout_DecDeleteBuffer( p_dec->p_aout, p_dec->p_aout_input, - p_buffer ); + //p_dec->b_error = true; + return NULL; } - break; + /* Copy the whole frame into the buffer. When we reach this point + * we already know we have enough data available. */ + block_GetBytes( &p_sys->bytestream, p_buf, p_sys->i_frame_size ); + + /* Make sure we don't reuse the same pts twice */ + if( p_sys->i_pts == p_sys->bytestream.p_block->i_pts ) + p_sys->i_pts = p_sys->bytestream.p_block->i_pts = 0; + + p_sys->i_state = STATE_NOSYNC; + + /* So p_block doesn't get re-added several times */ + *pp_block = block_BytestreamPop( &p_sys->bytestream ); + + return p_out_buffer; } + } + + return NULL; +} + +/***************************************************************************** + * CloseDecoder: clean up the decoder + *****************************************************************************/ +static void CloseDecoder( vlc_object_t *p_this ) +{ + decoder_t *p_dec = (decoder_t*)p_this; + decoder_sys_t *p_sys = p_dec->p_sys; + + block_BytestreamRelease( &p_sys->bytestream ); - /* Send the buffer to the aout core. */ - aout_DecPlay( p_dec->p_aout, p_dec->p_aout_input, p_buffer ); + free( p_sys ); +} + +/***************************************************************************** + * GetOutBuffer: + *****************************************************************************/ +static uint8_t *GetOutBuffer( decoder_t *p_dec, void **pp_out_buffer ) +{ + decoder_sys_t *p_sys = p_dec->p_sys; + uint8_t *p_buf; + + if( p_dec->fmt_out.audio.i_rate != p_sys->i_rate ) + { + msg_Info( p_dec, "DTS channels:%d samplerate:%d bitrate:%d", + p_sys->i_channels, p_sys->i_rate, p_sys->i_bit_rate ); + + aout_DateInit( &p_sys->end_date, p_sys->i_rate ); + aout_DateSet( &p_sys->end_date, p_sys->i_pts ); } - if( p_dec->p_fifo->b_error ) + p_dec->fmt_out.audio.i_rate = p_sys->i_rate; + p_dec->fmt_out.audio.i_channels = p_sys->i_channels; + /* Hack for DTS S/PDIF filter which needs to pad the DTS frames */ + p_dec->fmt_out.audio.i_bytes_per_frame = + __MAX( p_sys->i_frame_size, p_sys->i_frame_length * 4 ); + p_dec->fmt_out.audio.i_frame_length = p_sys->i_frame_length; + + p_dec->fmt_out.audio.i_original_channels = p_sys->i_channels_conf; + p_dec->fmt_out.audio.i_physical_channels = + p_sys->i_channels_conf & AOUT_CHAN_PHYSMASK; + + p_dec->fmt_out.i_bitrate = p_sys->i_bit_rate; + + if( p_sys->b_packetizer ) { - DecoderError( p_dec->p_fifo ); + block_t *p_sout_buffer = GetSoutBuffer( p_dec ); + p_buf = p_sout_buffer ? p_sout_buffer->p_buffer : NULL; + *pp_out_buffer = p_sout_buffer; } + else + { + aout_buffer_t *p_aout_buffer = GetAoutBuffer( p_dec ); + p_buf = p_aout_buffer ? p_aout_buffer->p_buffer : NULL; + *pp_out_buffer = p_aout_buffer; + } + + return p_buf; +} + +/***************************************************************************** + * GetAoutBuffer: + *****************************************************************************/ +static aout_buffer_t *GetAoutBuffer( decoder_t *p_dec ) +{ + decoder_sys_t *p_sys = p_dec->p_sys; + aout_buffer_t *p_buf; - EndThread( p_dec ); + /* Hack for DTS S/PDIF filter which needs to send 3 frames at a time + * (plus a few header bytes) */ + p_buf = p_dec->pf_aout_buffer_new( p_dec, p_sys->i_frame_length * 4 ); + if( p_buf == NULL ) return NULL; + p_buf->i_nb_samples = p_sys->i_frame_length; + p_buf->i_nb_bytes = p_sys->i_frame_size; - return 0; + p_buf->start_date = aout_DateGet( &p_sys->end_date ); + p_buf->end_date = + aout_DateIncrement( &p_sys->end_date, p_sys->i_frame_length ); + + return p_buf; } /***************************************************************************** - * EndThread : thread destruction + * GetSoutBuffer: *****************************************************************************/ -static void EndThread( dec_thread_t * p_dec ) +static block_t *GetSoutBuffer( decoder_t *p_dec ) { - if ( p_dec->p_aout_input != NULL ) - { - aout_DecDelete( p_dec->p_aout, p_dec->p_aout_input ); - } + decoder_sys_t *p_sys = p_dec->p_sys; + block_t *p_block; + + p_block = block_New( p_dec, p_sys->i_frame_size ); + if( p_block == NULL ) return NULL; + + p_block->i_pts = p_block->i_dts = aout_DateGet( &p_sys->end_date ); - CloseBitstream( &p_dec->bit_stream ); - free( p_dec ); + p_block->i_length = aout_DateIncrement( &p_sys->end_date, + p_sys->i_frame_length ) - p_block->i_pts; + + return p_block; } /***************************************************************************** * SyncInfo: parse DTS sync info *****************************************************************************/ -static int SyncInfo( const byte_t * p_buf, unsigned int * pi_channels, - unsigned int * pi_sample_rate, - unsigned int * pi_bit_rate, - unsigned int * pi_frame_length ) +static const unsigned int ppi_dts_samplerate[] = +{ + 0, 8000, 16000, 32000, 0, 0, 11025, 22050, 44100, 0, 0, + 12000, 24000, 48000, 96000, 192000 +}; + +static const unsigned int ppi_dts_bitrate[] = +{ + 32000, 56000, 64000, 96000, 112000, 128000, + 192000, 224000, 256000, 320000, 384000, + 448000, 512000, 576000, 640000, 768000, + 896000, 1024000, 1152000, 1280000, 1344000, + 1408000, 1411200, 1472000, 1536000, 1920000, + 2048000, 3072000, 3840000, 1/*open*/, 2/*variable*/, 3/*lossless*/ +}; + +static int SyncInfo16be( const uint8_t *p_buf, + unsigned int *pi_audio_mode, + unsigned int *pi_sample_rate, + unsigned int *pi_bit_rate, + unsigned int *pi_frame_length ) { - unsigned int i_bit_rate; - unsigned int i_audio_mode; - unsigned int i_sample_rate; unsigned int i_frame_size; - unsigned int i_frame_length; + unsigned int i_lfe; + + *pi_frame_length = (p_buf[4] & 0x01) << 6 | (p_buf[5] >> 2); + i_frame_size = (p_buf[5] & 0x03) << 12 | (p_buf[6] << 4) | + (p_buf[7] >> 4); + + *pi_audio_mode = (p_buf[7] & 0x0f) << 2 | (p_buf[8] >> 6); + *pi_sample_rate = (p_buf[8] >> 2) & 0x0f; + *pi_bit_rate = (p_buf[8] & 0x03) << 3 | ((p_buf[9] >> 5) & 0x07); + + i_lfe = (p_buf[10] >> 1) & 0x03; + if( i_lfe ) *pi_audio_mode |= 0x10000; + + return i_frame_size + 1; +} - static const unsigned int ppi_dts_samplerate[] = +static void BufLeToBe( uint8_t *p_out, const uint8_t *p_in, int i_in ) +{ + int i; + + for( i = 0; i < i_in/2; i++ ) { - 0, 8000, 16000, 32000, 64000, 128000, - 11025, 22050, 44010, 88020, 176400, - 12000, 24000, 48000, 96000, 192000 - }; + p_out[i*2] = p_in[i*2+1]; + p_out[i*2+1] = p_in[i*2]; + } +} + +static int Buf14To16( uint8_t *p_out, const uint8_t *p_in, int i_in, int i_le ) +{ + unsigned char tmp, cur = 0; + int bits_in, bits_out = 0; + int i, i_out = 0; + + for( i = 0; i < i_in; i++ ) + { + if( i%2 ) + { + tmp = p_in[i-i_le]; + bits_in = 8; + } + else + { + tmp = p_in[i+i_le] & 0x3F; + bits_in = 8 - 2; + } + + if( bits_out < 8 ) + { + int need = __MIN( 8 - bits_out, bits_in ); + cur <<= need; + cur |= ( tmp >> (bits_in - need) ); + tmp <<= (8 - bits_in + need); + tmp >>= (8 - bits_in + need); + bits_in -= need; + bits_out += need; + } - static const unsigned int ppi_dts_bitrate[] = + if( bits_out == 8 ) + { + p_out[i_out] = cur; + cur = 0; + bits_out = 0; + i_out++; + } + + bits_out += bits_in; + cur <<= bits_in; + cur |= tmp; + } + + return i_out; +} + +static inline int SyncCode( const uint8_t *p_buf ) +{ + /* 14 bits, little endian version of the bitstream */ + if( p_buf[0] == 0xff && p_buf[1] == 0x1f && + p_buf[2] == 0x00 && p_buf[3] == 0xe8 && + (p_buf[4] & 0xf0) == 0xf0 && p_buf[5] == 0x07 ) { - 32000, 56000, 64000, 96000, 112000, 128000, - 192000, 224000, 256000, 320000, 384000, - 448000, 512000, 576000, 640000, 768000, - 896000, 1024000, 1152000, 1280000, 1344000, - 1408000, 1411200, 1472000, 1536000, 1920000, - 2048000, 3072000, 3840000, 4096000, 0, 0 - }; - - if( (p_buf[0] != 0x7f) || (p_buf[1] != 0xfe) || - (p_buf[2] != 0x80) || (p_buf[3] != 0x01) ) + return VLC_SUCCESS; + } + /* 14 bits, big endian version of the bitstream */ + else if( p_buf[0] == 0x1f && p_buf[1] == 0xff && + p_buf[2] == 0xe8 && p_buf[3] == 0x00 && + p_buf[4] == 0x07 && (p_buf[5] & 0xf0) == 0xf0 ) + { + return VLC_SUCCESS; + } + /* 16 bits, big endian version of the bitstream */ + else if( p_buf[0] == 0x7f && p_buf[1] == 0xfe && + p_buf[2] == 0x80 && p_buf[3] == 0x01 ) + { + return VLC_SUCCESS; + } + /* 16 bits, little endian version of the bitstream */ + else if( p_buf[0] == 0xfe && p_buf[1] == 0x7f && + p_buf[2] == 0x01 && p_buf[3] == 0x80 ) { - return( 0 ); + return VLC_SUCCESS; } + else return VLC_EGENERIC; +} - i_frame_length = (p_buf[4] & 0x01) << 6 | (p_buf[5] >> 2); - i_frame_size = (p_buf[5] & 0x03) << 12 | (p_buf[6] << 4) | - (p_buf[7] >> 4); +static int SyncInfo( const uint8_t *p_buf, + unsigned int *pi_channels, + unsigned int *pi_channels_conf, + unsigned int *pi_sample_rate, + unsigned int *pi_bit_rate, + unsigned int *pi_frame_length ) +{ + unsigned int i_audio_mode; + unsigned int i_frame_size; - i_audio_mode = (p_buf[7] & 0x0f) << 2 | (p_buf[8] >> 6); - i_sample_rate = (p_buf[8] >> 2) & 0x0f; - i_bit_rate = (p_buf[8] & 0x03) << 3 | ((p_buf[9] >> 5) & 0x07); + /* 14 bits, little endian version of the bitstream */ + if( p_buf[0] == 0xff && p_buf[1] == 0x1f && + p_buf[2] == 0x00 && p_buf[3] == 0xe8 && + (p_buf[4] & 0xf0) == 0xf0 && p_buf[5] == 0x07 ) + { + uint8_t conv_buf[DTS_HEADER_SIZE]; + Buf14To16( conv_buf, p_buf, DTS_HEADER_SIZE, 1 ); + i_frame_size = SyncInfo16be( conv_buf, &i_audio_mode, pi_sample_rate, + pi_bit_rate, pi_frame_length ); + i_frame_size = i_frame_size * 8 / 14 * 2; + } + /* 14 bits, big endian version of the bitstream */ + else if( p_buf[0] == 0x1f && p_buf[1] == 0xff && + p_buf[2] == 0xe8 && p_buf[3] == 0x00 && + p_buf[4] == 0x07 && (p_buf[5] & 0xf0) == 0xf0 ) + { + uint8_t conv_buf[DTS_HEADER_SIZE]; + Buf14To16( conv_buf, p_buf, DTS_HEADER_SIZE, 0 ); + i_frame_size = SyncInfo16be( conv_buf, &i_audio_mode, pi_sample_rate, + pi_bit_rate, pi_frame_length ); + i_frame_size = i_frame_size * 8 / 14 * 2; + } + /* 16 bits, big endian version of the bitstream */ + else if( p_buf[0] == 0x7f && p_buf[1] == 0xfe && + p_buf[2] == 0x80 && p_buf[3] == 0x01 ) + { + i_frame_size = SyncInfo16be( p_buf, &i_audio_mode, pi_sample_rate, + pi_bit_rate, pi_frame_length ); + } + /* 16 bits, little endian version of the bitstream */ + else if( p_buf[0] == 0xfe && p_buf[1] == 0x7f && + p_buf[2] == 0x01 && p_buf[3] == 0x80 ) + { + uint8_t conv_buf[DTS_HEADER_SIZE]; + BufLeToBe( conv_buf, p_buf, DTS_HEADER_SIZE ); + i_frame_size = SyncInfo16be( p_buf, &i_audio_mode, pi_sample_rate, + pi_bit_rate, pi_frame_length ); + } + else return 0; - switch( i_audio_mode ) + switch( i_audio_mode & 0xFFFF ) { case 0x0: /* Mono */ - *pi_channels = AOUT_CHAN_CENTER; + *pi_channels_conf = AOUT_CHAN_CENTER; break; case 0x1: /* Dual-mono = stereo + dual-mono */ - *pi_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | + *pi_channels_conf = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_DUALMONO; break; case 0x2: case 0x3: case 0x4: /* Stereo */ - *pi_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT; + *pi_channels = 2; + *pi_channels_conf = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT; break; case 0x5: /* 3F */ - *pi_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER; + *pi_channels = 3; + *pi_channels_conf = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | + AOUT_CHAN_CENTER; break; case 0x6: - /* 2F/LFE */ - *pi_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_LFE; + /* 2F/1R */ + *pi_channels = 3; + *pi_channels_conf = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | + AOUT_CHAN_REARCENTER; break; case 0x7: - /* 3F/LFE */ - *pi_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | - AOUT_CHAN_CENTER | AOUT_CHAN_LFE; + /* 3F/1R */ + *pi_channels = 4; + *pi_channels_conf = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | + AOUT_CHAN_CENTER | AOUT_CHAN_REARCENTER; break; case 0x8: /* 2F2R */ - *pi_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | - AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT; + *pi_channels = 4; + *pi_channels_conf = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | + AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT; break; case 0x9: /* 3F2R */ - *pi_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | - AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT | - AOUT_CHAN_REARRIGHT; + *pi_channels = 5; + *pi_channels_conf = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | + AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT | + AOUT_CHAN_REARRIGHT; break; case 0xA: case 0xB: /* 2F2M2R */ - *pi_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | - AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT | - AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT; + *pi_channels = 6; + *pi_channels_conf = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | + AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT | + AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT; break; case 0xC: /* 3F2M2R */ - *pi_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | - AOUT_CHAN_CENTER | AOUT_CHAN_MIDDLELEFT | - AOUT_CHAN_MIDDLERIGHT | AOUT_CHAN_REARLEFT | - AOUT_CHAN_REARRIGHT; + *pi_channels = 7; + *pi_channels_conf = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | + AOUT_CHAN_CENTER | AOUT_CHAN_MIDDLELEFT | + AOUT_CHAN_MIDDLERIGHT | AOUT_CHAN_REARLEFT | + AOUT_CHAN_REARRIGHT; break; case 0xD: case 0xE: /* 3F2M2R/LFE */ - *pi_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | - AOUT_CHAN_CENTER | AOUT_CHAN_MIDDLELEFT | - AOUT_CHAN_MIDDLERIGHT | AOUT_CHAN_REARLEFT | - AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE; + *pi_channels = 8; + *pi_channels_conf = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | + AOUT_CHAN_CENTER | AOUT_CHAN_MIDDLELEFT | + AOUT_CHAN_MIDDLERIGHT | AOUT_CHAN_REARLEFT | + AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE; break; default: if( i_audio_mode <= 63 ) { /* User defined */ - *pi_channels = 0; - } - else - { - return( 0 ); + *pi_channels = 0; + *pi_channels_conf = 0; } + else return 0; break; } - if( i_sample_rate >= sizeof( ppi_dts_samplerate ) / - sizeof( ppi_dts_samplerate[0] ) ) + if( i_audio_mode & 0x10000 ) { - return( 0 ); + (*pi_channels)++; + *pi_channels_conf |= AOUT_CHAN_LFE; } - *pi_sample_rate = ppi_dts_samplerate[ i_sample_rate ]; - - if( i_bit_rate >= sizeof( ppi_dts_bitrate ) / - sizeof( ppi_dts_bitrate[0] ) ) + if( *pi_sample_rate >= sizeof( ppi_dts_samplerate ) / + sizeof( ppi_dts_samplerate[0] ) ) { - return( 0 ); + return 0; } + *pi_sample_rate = ppi_dts_samplerate[ *pi_sample_rate ]; + if( !*pi_sample_rate ) return 0; - *pi_bit_rate = ppi_dts_bitrate[ i_bit_rate ]; + if( *pi_bit_rate >= sizeof( ppi_dts_bitrate ) / + sizeof( ppi_dts_bitrate[0] ) ) + { + return 0; + } + *pi_bit_rate = ppi_dts_bitrate[ *pi_bit_rate ]; + if( !*pi_bit_rate ) return 0; - *pi_frame_length = (i_frame_length + 1) * 32; + *pi_frame_length = (*pi_frame_length + 1) * 32; - return( i_frame_size + 1 ); + return i_frame_size; }