--- /dev/null
+/*****************************************************************************
+ * flac.c: flac decoder/packetizer module making use of libflac
+ *****************************************************************************
+ * Copyright (C) 1999-2001 VideoLAN
+ * $Id: flac.c,v 1.1 2003/11/21 01:45:48 gbazin Exp $
+ *
+ * Authors: Gildas Bazin <gbazin@netcourrier.com>
+ * Sigmund Augdal <sigmunau@idi.ntnu.no>
+ *
+ * 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 <vlc/vlc.h>
+#include <vlc/decoder.h>
+#include <vlc/input.h>
+
+#include <FLAC/stream_decoder.h>
+
+#include "vlc_block_helper.h"
+
+#define MAX_FLAC_HEADER_SIZE 16
+
+/*****************************************************************************
+ * decoder_sys_t : FLAC decoder descriptor
+ *****************************************************************************/
+struct decoder_sys_t
+{
+ /* Module mode */
+ vlc_bool_t b_packetizer;
+
+ /*
+ * Input properties
+ */
+ int i_state;
+
+ block_bytestream_t bytestream;
+
+ /*
+ * Input/Output properties
+ */
+ block_t *p_block;
+ aout_buffer_t *p_aout_buffer;
+
+ /*
+ * FLAC properties
+ */
+ FLAC__StreamDecoder *p_flac;
+
+ vlc_bool_t b_stream_info;
+ FLAC__StreamMetadata_StreamInfo stream_info;
+
+ /*
+ * Common properties
+ */
+ audio_date_t end_date;
+ mtime_t i_pts;
+
+ int i_frame_size, i_frame_length, i_bits_per_sample;
+ unsigned int i_rate, i_channels, i_channels_conf;
+};
+
+enum {
+
+ STATE_NOSYNC,
+ STATE_SYNC,
+ STATE_HEADER,
+ STATE_NEXT_SYNC,
+ STATE_GET_DATA,
+ STATE_SEND_DATA
+};
+
+static int pi_channels_maps[6] =
+{
+ 0,
+ AOUT_CHAN_CENTER,
+ AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT,
+ AOUT_CHAN_CENTER | AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT,
+ AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_REARLEFT
+ | AOUT_CHAN_REARRIGHT,
+ AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
+ | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT
+};
+
+/*****************************************************************************
+ * Local prototypes
+ *****************************************************************************/
+static int OpenDecoder ( vlc_object_t * );
+static int OpenPacketizer( vlc_object_t * );
+static void CloseDecoder ( vlc_object_t * );
+
+static aout_buffer_t *DecodeBlock( decoder_t *, block_t ** );
+static block_t *PacketizeBlock( decoder_t *, block_t ** );
+
+static int SyncInfo( decoder_t *, uint8_t *, int *, int *, int *,int * );
+
+
+static FLAC__StreamDecoderReadStatus
+DecoderReadCallback( const FLAC__StreamDecoder *decoder,
+ FLAC__byte buffer[], unsigned *bytes, void *client_data );
+
+static FLAC__StreamDecoderWriteStatus
+DecoderWriteCallback( const FLAC__StreamDecoder *decoder,
+ const FLAC__Frame *frame,
+ const FLAC__int32 *const buffer[], void *client_data );
+
+static void DecoderMetadataCallback( const FLAC__StreamDecoder *decoder,
+ const FLAC__StreamMetadata *metadata,
+ void *client_data );
+static void DecoderErrorCallback( const FLAC__StreamDecoder *decoder,
+ FLAC__StreamDecoderErrorStatus status,
+ void *client_data);
+
+static void Interleave32( int32_t *p_out, const int32_t * const *pp_in,
+ int i_nb_channels, int i_samples );
+static void Interleave16( int16_t *p_out, const int32_t * const *pp_in,
+ int i_nb_channels, int i_samples );
+
+static void decoder_state_error( decoder_t *p_dec,
+ FLAC__StreamDecoderState state );
+
+static uint64_t read_utf8( const uint8_t *p_buf, int *pi_read );
+static uint8_t flac_crc8( const uint8_t *data, unsigned len );
+
+/*****************************************************************************
+ * Module descriptor
+ *****************************************************************************/
+vlc_module_begin();
+
+ set_description( _("Flac audio decoder") );
+ set_capability( "decoder", 100 );
+ set_callbacks( OpenDecoder, CloseDecoder );
+
+ add_submodule();
+ set_description( _("Flac audio packetizer") );
+ set_capability( "packetizer", 100 );
+ set_callbacks( OpenPacketizer, CloseDecoder );
+
+vlc_module_end();
+
+/*****************************************************************************
+ * OpenDecoder: probe the decoder and return score
+ *****************************************************************************/
+static int OpenDecoder( vlc_object_t *p_this )
+{
+ decoder_t *p_dec = (decoder_t*)p_this;
+ decoder_sys_t *p_sys;
+
+ if( p_dec->fmt_in.i_codec != VLC_FOURCC('f','l','a','c') )
+ {
+ return VLC_EGENERIC;
+ }
+
+ /* 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 )
+ {
+ msg_Err( p_dec, "out of memory" );
+ return VLC_EGENERIC;
+ }
+
+ /* Misc init */
+ aout_DateSet( &p_sys->end_date, 0 );
+ p_sys->b_packetizer = VLC_FALSE;
+ p_sys->i_state = STATE_NOSYNC;
+
+ p_sys->bytestream = block_BytestreamInit( p_dec );
+
+ /* Take care of flac init */
+ if( !(p_sys->p_flac = FLAC__stream_decoder_new()) )
+ {
+ msg_Err( p_dec, "FLAC__stream_decoder_new() failed" );
+ free( p_sys );
+ return VLC_EGENERIC;
+ }
+
+ FLAC__stream_decoder_set_read_callback( p_sys->p_flac,
+ DecoderReadCallback );
+ FLAC__stream_decoder_set_write_callback( p_sys->p_flac,
+ DecoderWriteCallback );
+ FLAC__stream_decoder_set_metadata_callback( p_sys->p_flac,
+ DecoderMetadataCallback );
+ FLAC__stream_decoder_set_error_callback( p_sys->p_flac,
+ DecoderErrorCallback );
+ FLAC__stream_decoder_set_client_data( p_sys->p_flac, p_dec );
+
+ FLAC__stream_decoder_init( p_sys->p_flac );
+
+ /* Set output properties */
+ p_dec->fmt_out.i_cat = AUDIO_ES;
+ p_dec->fmt_out.i_codec = VLC_FOURCC('f','l','3','2');
+
+ /* Set callbacks */
+ p_dec->pf_decode_audio = DecodeBlock;
+ p_dec->pf_packetize = PacketizeBlock;
+
+
+ /* Decode STREAMINFO */
+ msg_Dbg( p_dec, "decode STREAMINFO" );
+ p_sys->p_block = block_New( p_dec, p_dec->fmt_in.i_extra + 4 );
+ memcpy( p_sys->p_block->p_buffer + 4, p_dec->fmt_in.p_extra,
+ p_dec->fmt_in.i_extra );
+ memcpy( p_sys->p_block->p_buffer, "fLaC", 4 );
+ FLAC__stream_decoder_process_until_end_of_metadata( p_sys->p_flac );
+ msg_Dbg( p_dec, "STREAMINFO decoded" );
+
+ 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 = VLC_TRUE;
+ p_dec->fmt_out.i_codec = VLC_FOURCC('f','l','a','c');
+ }
+
+ return i_ret;
+}
+
+/****************************************************************************
+ * PacketizeBlock: the whole thing
+ ****************************************************************************
+ * This function is called just after the thread is launched.
+ ****************************************************************************/
+static block_t *PacketizeBlock( decoder_t *p_dec, block_t **pp_block )
+{
+ decoder_sys_t *p_sys = p_dec->p_sys;
+ uint8_t p_header[MAX_FLAC_HEADER_SIZE];
+ block_t *p_sout_block;
+
+ if( !pp_block || !*pp_block ) return NULL;
+
+#if 0
+ if( (*pp_block)->b_discontinuity )
+ {
+ p_sys->i_state = STATE_NOSYNC;
+ }
+#endif
+
+ block_BytestreamPush( &p_sys->bytestream, *pp_block );
+
+ while( 1 )
+ {
+ switch( p_sys->i_state )
+ {
+ case STATE_NOSYNC:
+ while( block_PeekBytes( &p_sys->bytestream, p_header, 2 )
+ == VLC_SUCCESS )
+ {
+ if( p_header[0] == 0xFF && p_header[1] == 0xF8 )
+ {
+ p_sys->i_state = STATE_SYNC;
+ break;
+ }
+ block_SkipByte( &p_sys->bytestream );
+ }
+ if( p_sys->i_state != STATE_SYNC )
+ {
+ block_BytestreamFlush( &p_sys->bytestream );
+
+ /* Need more data */
+ return NULL;
+ }
+
+ 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 ) )
+ {
+ aout_DateSet( &p_sys->end_date, p_sys->i_pts );
+ }
+ p_sys->i_state = STATE_HEADER;
+
+ case STATE_HEADER:
+ /* Get FLAC frame header (MAX_FLAC_HEADER_SIZE bytes) */
+ if( block_PeekBytes( &p_sys->bytestream, p_header,
+ MAX_FLAC_HEADER_SIZE ) != VLC_SUCCESS )
+ {
+ /* Need more data */
+ return NULL;
+ }
+
+ /* Check if frame is valid and get frame info */
+ p_sys->i_frame_length = SyncInfo( p_dec, p_header,
+ &p_sys->i_channels,
+ &p_sys->i_channels_conf,
+ &p_sys->i_rate,
+ &p_sys->i_bits_per_sample );
+ if( !p_sys->i_frame_length )
+ {
+ 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;
+ p_sys->i_frame_size = 1;
+
+ case STATE_NEXT_SYNC:
+ /* TODO: If pp_block == NULL, flush the buffer without checking the
+ * next sync word */
+
+ /* Check if next expected frame contains the sync word */
+ while( block_PeekOffsetBytes( &p_sys->bytestream,
+ p_sys->i_frame_size, p_header,
+ MAX_FLAC_HEADER_SIZE )
+ == VLC_SUCCESS )
+ {
+ if( p_header[0] == 0xFF && p_header[1] == 0xF8 )
+ {
+ /* Check if frame is valid and get frame info */
+ p_sys->i_frame_length =
+ SyncInfo( p_dec, p_header,
+ &p_sys->i_channels,
+ &p_sys->i_channels_conf,
+ &p_sys->i_rate,
+ &p_sys->i_bits_per_sample );
+
+ if( p_sys->i_frame_length )
+ {
+ p_sys->i_state = STATE_SEND_DATA;
+ break;
+ }
+ }
+ p_sys->i_frame_size++;
+ }
+
+ if( p_sys->i_state != STATE_SEND_DATA )
+ {
+ /* Need more data */
+ return NULL;
+ }
+ break;
+
+ case STATE_SEND_DATA:
+ p_sout_block = block_New( p_dec, p_sys->i_frame_size );
+
+ /* 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_sout_block->p_buffer,
+ 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;
+
+ /* So p_block doesn't get re-added several times */
+ *pp_block = block_BytestreamPop( &p_sys->bytestream );
+
+ p_sys->i_state = STATE_NOSYNC;
+
+ /* Date management */
+ p_sout_block->i_pts = aout_DateGet( &p_sys->end_date );
+ p_sout_block->i_length =
+ aout_DateIncrement( &p_sys->end_date, p_sys->i_frame_length );
+
+ return p_sout_block;
+ }
+ }
+
+ return NULL;
+}
+
+/****************************************************************************
+ * DecodeBlock: the whole thing
+ ****************************************************************************/
+static aout_buffer_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
+{
+ decoder_sys_t *p_sys = p_dec->p_sys;
+
+ if( !pp_block || !*pp_block ) return NULL;
+
+ if( !aout_DateGet( &p_sys->end_date ) && !(*pp_block)->i_pts )
+ {
+ /* We've just started the stream, wait for the first PTS. */
+ block_Release( *pp_block );
+ return NULL;
+ }
+
+ p_sys->p_aout_buffer = 0;
+ if( ( p_sys->p_block = PacketizeBlock( p_dec, pp_block ) ) )
+ {
+ if( !FLAC__stream_decoder_process_single( p_sys->p_flac ) )
+ {
+ decoder_state_error( p_dec,
+ FLAC__stream_decoder_get_state( p_sys->p_flac ) );
+ }
+ block_Release( p_sys->p_block );
+ }
+
+ return p_sys->p_aout_buffer;
+}
+
+/*****************************************************************************
+ * CloseDecoder: flac decoder destruction
+ *****************************************************************************/
+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;
+
+ FLAC__stream_decoder_finish( p_sys->p_flac );
+ FLAC__stream_decoder_delete( p_sys->p_flac );
+ free( p_sys );
+}
+
+/*****************************************************************************
+ * DecoderReadCallback: called by libflac when it needs more data
+ *****************************************************************************/
+static FLAC__StreamDecoderReadStatus
+DecoderReadCallback( const FLAC__StreamDecoder *decoder, FLAC__byte buffer[],
+ unsigned *bytes, void *client_data )
+{
+ decoder_t *p_dec = (decoder_t *)client_data;
+ decoder_sys_t *p_sys = p_dec->p_sys;
+
+ msg_Err( p_dec, "buffer: %i", p_sys->p_block->i_buffer );
+ if( p_sys->p_block && p_sys->p_block->i_buffer )
+ {
+ *bytes = __MIN(*bytes, (unsigned)p_sys->p_block->i_buffer);
+ memcpy( buffer, p_sys->p_block->p_buffer, *bytes );
+ p_sys->p_block->i_buffer -= *bytes;
+ p_sys->p_block->p_buffer += *bytes;
+ }
+ else
+ {
+ *bytes = 0;
+ return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
+ }
+
+ return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
+}
+
+/*****************************************************************************
+ * DecoderWriteCallback: called by libflac to output decoded samples
+ *****************************************************************************/
+static FLAC__StreamDecoderWriteStatus
+DecoderWriteCallback( const FLAC__StreamDecoder *decoder,
+ const FLAC__Frame *frame,
+ const FLAC__int32 *const buffer[], void *client_data )
+{
+ decoder_t *p_dec = (decoder_t *)client_data;
+ decoder_sys_t *p_sys = p_dec->p_sys;
+
+ if( p_sys->p_block && p_sys->p_block->i_pts != 0 &&
+ p_sys->p_block->i_pts != aout_DateGet( &p_sys->end_date ) )
+ {
+ aout_DateSet( &p_sys->end_date, p_sys->p_block->i_pts );
+ }
+ else if( !aout_DateGet( &p_sys->end_date ) )
+ {
+ return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
+ }
+
+ if( p_sys->p_block ) p_sys->p_block->i_pts = 0;
+
+ p_sys->p_aout_buffer =
+ p_dec->pf_aout_buffer_new( p_dec, frame->header.blocksize );
+
+ if( p_sys->p_aout_buffer == NULL )
+ return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
+
+ switch( frame->header.bits_per_sample )
+ {
+ case 16:
+ Interleave16( (int16_t *)p_sys->p_aout_buffer->p_buffer, buffer,
+ frame->header.channels, frame->header.blocksize );
+ break;
+ default:
+ Interleave32( (int32_t *)p_sys->p_aout_buffer->p_buffer, buffer,
+ frame->header.channels, frame->header.blocksize );
+ }
+
+ /* Date management */
+ p_sys->p_aout_buffer->start_date = aout_DateGet( &p_sys->end_date );
+ p_sys->p_aout_buffer->end_date =
+ aout_DateIncrement( &p_sys->end_date, frame->header.blocksize );
+
+ return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
+}
+
+/*****************************************************************************
+ * DecoderMetadataCallback: called by libflac to when it encounters metadata
+ *****************************************************************************/
+static void DecoderMetadataCallback( const FLAC__StreamDecoder *decoder,
+ const FLAC__StreamMetadata *metadata,
+ void *client_data )
+{
+ decoder_t *p_dec = (decoder_t *)client_data;
+ decoder_sys_t *p_sys = p_dec->p_sys;
+
+ switch( metadata->data.stream_info.bits_per_sample )
+ {
+ case 8:
+ p_dec->fmt_out.i_codec = VLC_FOURCC('s','8',' ',' ');
+ break;
+ case 16:
+ p_dec->fmt_out.i_codec = AOUT_FMT_S16_NE;
+ break;
+ default:
+ msg_Dbg( p_dec, "strange bps %d",
+ metadata->data.stream_info.bits_per_sample );
+ p_dec->fmt_out.i_codec = VLC_FOURCC('f','i','3','2');
+ break;
+ }
+
+ /* Setup the format */
+ p_dec->fmt_out.audio.i_rate = metadata->data.stream_info.sample_rate;
+ p_dec->fmt_out.audio.i_channels = metadata->data.stream_info.channels;
+ p_dec->fmt_out.audio.i_physical_channels =
+ p_dec->fmt_out.audio.i_original_channels =
+ pi_channels_maps[metadata->data.stream_info.channels];
+ p_dec->fmt_out.audio.i_bitspersample =
+ metadata->data.stream_info.bits_per_sample;
+
+ aout_DateInit( &p_sys->end_date, p_dec->fmt_out.audio.i_rate );
+
+ msg_Dbg( p_dec, "channels:%d samplerate:%d bitspersamples:%d",
+ p_dec->fmt_out.audio.i_channels, p_dec->fmt_out.audio.i_rate,
+ p_dec->fmt_out.audio.i_bitspersample );
+
+ p_sys->b_stream_info = VLC_TRUE;
+ p_sys->stream_info = metadata->data.stream_info;
+
+ return;
+}
+
+/*****************************************************************************
+ * DecoderErrorCallback: called when the libflac decoder encounters an error
+ *****************************************************************************/
+static void DecoderErrorCallback( const FLAC__StreamDecoder *decoder,
+ FLAC__StreamDecoderErrorStatus status,
+ void *client_data )
+{
+ decoder_t *p_dec = (decoder_t *)client_data;
+
+ switch( status )
+ {
+ case FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC:
+ msg_Err( p_dec, "An error in the stream caused the decoder to "
+ "loose synchronization." );
+ break;
+ case FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER:
+ msg_Err( p_dec, "The decoder encountered a corrupted frame header." );
+ break;
+ case FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH:
+ msg_Err( p_dec, "The frame's data did not match the CRC in the "
+ "footer." );
+ break;
+ default:
+ msg_Err( p_dec, "got decoder error: %d", status );
+ }
+ return;
+}
+
+/*****************************************************************************
+ * Interleave: helper function to interleave channels
+ *****************************************************************************/
+static void Interleave32( int32_t *p_out, const int32_t * const *pp_in,
+ int i_nb_channels, int i_samples )
+{
+ int i, j;
+ for ( j = 0; j < i_samples; j++ )
+ {
+ for ( i = 0; i < i_nb_channels; i++ )
+ {
+ p_out[j * i_nb_channels + i] = pp_in[i][j];
+ }
+ }
+}
+static void Interleave16( int16_t *p_out, const int32_t * const *pp_in,
+ int i_nb_channels, int i_samples )
+{
+ int i, j;
+ for ( j = 0; j < i_samples; j++ )
+ {
+ for ( i = 0; i < i_nb_channels; i++ )
+ {
+ p_out[j * i_nb_channels + i] = (int32_t)(pp_in[i][j]);
+ }
+ }
+}
+
+/*****************************************************************************
+ * decoder_state_error: print meaningful error messages
+ *****************************************************************************/
+static void decoder_state_error( decoder_t *p_dec,
+ FLAC__StreamDecoderState state )
+{
+ switch ( state )
+ {
+ case FLAC__STREAM_DECODER_SEARCH_FOR_METADATA:
+ msg_Err( p_dec, "The decoder is ready to search for metadata." );
+ break;
+ case FLAC__STREAM_DECODER_READ_METADATA:
+ msg_Err( p_dec, "The decoder is ready to or is in the process of "
+ "reading metadata." );
+ break;
+ case FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC:
+ msg_Err( p_dec, "The decoder is ready to or is in the process of "
+ "searching for the frame sync code." );
+ break;
+ case FLAC__STREAM_DECODER_READ_FRAME:
+ msg_Err( p_dec, "The decoder is ready to or is in the process of "
+ "reading a frame." );
+ break;
+ case FLAC__STREAM_DECODER_END_OF_STREAM:
+ msg_Err( p_dec, "The decoder has reached the end of the stream." );
+ break;
+ case FLAC__STREAM_DECODER_ABORTED:
+ msg_Err( p_dec, "The decoder was aborted by the read callback." );
+ break;
+ case FLAC__STREAM_DECODER_UNPARSEABLE_STREAM:
+ msg_Err( p_dec, "The decoder encountered reserved fields in use "
+ "in the stream." );
+ FLAC__stream_decoder_flush( p_dec->p_sys->p_flac );
+ break;
+ case FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR:
+ msg_Err( p_dec, "An error occurred allocating memory." );
+ break;
+ case FLAC__STREAM_DECODER_ALREADY_INITIALIZED:
+ msg_Err( p_dec, "FLAC__stream_decoder_init() was called when the "
+ "decoder was already initialized, usually because "
+ "FLAC__stream_decoder_finish() was not called." );
+ break;
+ case FLAC__STREAM_DECODER_INVALID_CALLBACK:
+ msg_Err( p_dec, "FLAC__stream_decoder_init() was called without "
+ "all callbacks being set." );
+ break;
+ case FLAC__STREAM_DECODER_UNINITIALIZED:
+ msg_Err( p_dec, "The decoder is in the uninitialized state." );
+ break;
+ default:
+ msg_Err(p_dec, "unknown error" );
+ }
+}
+
+/*****************************************************************************
+ * SyncInfo: parse FLAC sync info
+ *****************************************************************************/
+static int SyncInfo( decoder_t *p_dec, uint8_t *p_buf,
+ int * pi_channels, int * pi_channels_conf,
+ int * pi_sample_rate, int * pi_bits_per_sample )
+{
+ decoder_sys_t *p_sys = p_dec->p_sys;
+ int i_header, i_temp, i_read;
+ int i_blocksize = 0, i_blocksize_hint = 0, i_sample_rate_hint = 0;
+ uint64_t i_sample_number = 0;
+
+ vlc_bool_t b_variable_blocksize = ( p_sys->b_stream_info &&
+ p_sys->stream_info.min_blocksize != p_sys->stream_info.max_blocksize );
+ vlc_bool_t b_fixed_blocksize = ( p_sys->b_stream_info &&
+ p_sys->stream_info.min_blocksize == p_sys->stream_info.max_blocksize );
+
+ /* Check syncword */
+ if( p_buf[0] != 0xFF || p_buf[1] != 0xF8 ) return 0;
+
+ /* Check there is no emulated sync code in the rest of the header */
+ if( p_buf[2] == 0xff || p_buf[3] == 0xFF ) return 0;
+
+ /* Find blocksize (framelength) */
+ switch( i_temp = p_buf[2] >> 4 )
+ {
+ case 0:
+ if( b_fixed_blocksize )
+ i_blocksize = p_sys->stream_info.min_blocksize;
+ else return 0; /* We can't do anything with this */
+ break;
+
+ case 1:
+ i_blocksize = 192;
+ break;
+
+ case 2:
+ case 3:
+ case 4:
+ case 5:
+ i_blocksize = 576 << (i_temp - 2);
+ break;
+
+ case 6:
+ case 7:
+ i_blocksize_hint = i_temp;
+ break;
+
+ case 8:
+ case 9:
+ case 10:
+ case 11:
+ case 12:
+ case 13:
+ case 14:
+ case 15:
+ i_blocksize = 256 << (i_temp - 8);
+ break;
+ }
+
+ /* Find samplerate */
+ switch( i_temp = p_buf[2] & 0x0f )
+ {
+ case 0:
+ if( p_sys->b_stream_info )
+ *pi_sample_rate = p_sys->stream_info.sample_rate;
+ else return 0; /* We can't do anything with this */
+ break;
+
+ case 1:
+ case 2:
+ case 3:
+ return 0;
+ break;
+
+ case 4:
+ *pi_sample_rate = 8000;
+ break;
+
+ case 5:
+ *pi_sample_rate = 16000;
+ break;
+
+ case 6:
+ *pi_sample_rate = 22050;
+ break;
+
+ case 7:
+ *pi_sample_rate = 24000;
+ break;
+
+ case 8:
+ *pi_sample_rate = 32000;
+ break;
+
+ case 9:
+ *pi_sample_rate = 44100;
+ break;
+
+ case 10:
+ *pi_sample_rate = 48000;
+ break;
+
+ case 11:
+ *pi_sample_rate = 96000;
+ break;
+
+ case 12:
+ case 13:
+ case 14:
+ i_sample_rate_hint = i_temp;
+ break;
+
+ case 15:
+ return 0;
+ }
+
+ /* Find channels */
+ i_temp = (unsigned)(p_buf[3] >> 4);
+ if( i_temp & 8 )
+ {
+ int i_channel_assignment; /* ??? */
+
+ *pi_channels = 2;
+ switch( i_temp & 7 )
+ {
+ case 0:
+ i_channel_assignment = FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE;
+ break;
+ case 1:
+ i_channel_assignment = FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE;
+ break;
+ case 2:
+ i_channel_assignment = FLAC__CHANNEL_ASSIGNMENT_MID_SIDE;
+ break;
+ default:
+ return 0;
+ break;
+ }
+ }
+ else
+ {
+ *pi_channels = i_temp + 1;
+ *pi_channels_conf = pi_channels_maps[ *pi_channels ];
+ }
+
+ /* Find bits per sample */
+ switch( i_temp = (unsigned)(p_buf[3] & 0x0e) >> 1 )
+ {
+ case 0:
+ if( p_sys->b_stream_info )
+ *pi_bits_per_sample = p_sys->stream_info.bits_per_sample;
+ else
+ return 0;
+ break;
+
+ case 1:
+ *pi_bits_per_sample = 8;
+ break;
+
+ case 2:
+ *pi_bits_per_sample = 12;
+ break;
+
+ case 4:
+ *pi_bits_per_sample = 16;
+ break;
+
+ case 5:
+ *pi_bits_per_sample = 20;
+ break;
+
+ case 6:
+ *pi_bits_per_sample = 24;
+ break;
+
+ case 3:
+ case 7:
+ return 0;
+ break;
+ }
+
+ /* Zero padding bit */
+ if( p_buf[3] & 0x01 ) return 0;
+
+ /* End of fixed size header */
+ i_header = 4;
+
+ /* Find Sample/Frame number */
+ if( i_blocksize_hint && b_variable_blocksize )
+ {
+ i_sample_number = read_utf8( &p_buf[i_header++], &i_read );
+ if( i_sample_number == I64C(0xffffffffffffffff) ) return 0;
+ }
+ else
+ {
+ i_sample_number = read_utf8( &p_buf[i_header++], &i_read );
+ if( i_sample_number == I64C(0xffffffffffffffff) ) return 0;
+
+ if( p_sys->b_stream_info )
+ i_sample_number *= p_sys->stream_info.min_blocksize;
+ }
+
+ i_header += i_read;
+
+ /* Read blocksize */
+ if( i_blocksize_hint )
+ {
+ int i_val1 = p_buf[i_header++];
+ if( i_blocksize_hint == 7 )
+ {
+ int i_val2 = p_buf[i_header++];
+ i_val1 = (i_val1 << 8) | i_val2;
+ }
+ i_blocksize = i_val1 + 1;
+ }
+
+ /* Read sample rate */
+ if( i_sample_rate_hint )
+ {
+ int i_val1 = p_buf[i_header++];
+ if( i_sample_rate_hint != 12 )
+ {
+ int i_val2 = p_buf[i_header++];
+ i_val1 = (i_val1 << 8) | i_val2;
+ }
+ if( i_sample_rate_hint == 12 ) *pi_sample_rate = i_val1 * 1000;
+ else if( i_sample_rate_hint == 13 ) *pi_sample_rate = i_val1;
+ else *pi_sample_rate = i_val1 * 10;
+ }
+
+ /* Check the CRC-8 byte */
+ if( flac_crc8( p_buf, i_header ) != p_buf[i_header] )
+ {
+ return 0;
+ }
+
+ return i_blocksize;
+}
+
+/* Will return 0xffffffffffffffff for an invalid utf-8 sequence */
+static uint64_t read_utf8( const uint8_t *p_buf, int *pi_read )
+{
+ uint64_t i_result = 0;
+ unsigned i, j;
+
+ if( !(p_buf[0] & 0x80) ) /* 0xxxxxxx */
+ {
+ i_result = p_buf[0];
+ i = 0;
+ }
+ else if( p_buf[0] & 0xC0 && !(p_buf[0] & 0x20) ) /* 110xxxxx */
+ {
+ i_result = p_buf[0] & 0x1F;
+ i = 1;
+ }
+ else if( p_buf[0] & 0xE0 && !(p_buf[0] & 0x10) ) /* 1110xxxx */
+ {
+ i_result = p_buf[0] & 0x0F;
+ i = 2;
+ }
+ else if( p_buf[0] & 0xF0 && !(p_buf[0] & 0x08) ) /* 11110xxx */
+ {
+ i_result = p_buf[0] & 0x07;
+ i = 3;
+ }
+ else if( p_buf[0] & 0xF8 && !(p_buf[0] & 0x04) ) /* 111110xx */
+ {
+ i_result = p_buf[0] & 0x03;
+ i = 4;
+ }
+ else if( p_buf[0] & 0xFC && !(p_buf[0] & 0x02) ) /* 1111110x */
+ {
+ i_result = p_buf[0] & 0x01;
+ i = 5;
+ }
+ else if( p_buf[0] & 0xFE && !(p_buf[0] & 0x01) ) /* 11111110 */
+ {
+ i_result = 0;
+ i = 6;
+ }
+ else {
+ return I64C(0xffffffffffffffff);
+ }
+
+ for( j = 1; j <= i; j++ )
+ {
+ if( !(p_buf[j] & 0x80) || (p_buf[j] & 0x40) ) /* 10xxxxxx */
+ {
+ return I64C(0xffffffffffffffff);
+ }
+ i_result <<= 6;
+ i_result |= (p_buf[j] & 0x3F);
+ }
+
+ *pi_read = i;
+ return i_result;
+}
+
+/* CRC-8, poly = x^8 + x^2 + x^1 + x^0, init = 0 */
+static uint8_t const flac_crc8_table[256] = {
+ 0x00, 0x07, 0x0E, 0x09, 0x1C, 0x1B, 0x12, 0x15,
+ 0x38, 0x3F, 0x36, 0x31, 0x24, 0x23, 0x2A, 0x2D,
+ 0x70, 0x77, 0x7E, 0x79, 0x6C, 0x6B, 0x62, 0x65,
+ 0x48, 0x4F, 0x46, 0x41, 0x54, 0x53, 0x5A, 0x5D,
+ 0xE0, 0xE7, 0xEE, 0xE9, 0xFC, 0xFB, 0xF2, 0xF5,
+ 0xD8, 0xDF, 0xD6, 0xD1, 0xC4, 0xC3, 0xCA, 0xCD,
+ 0x90, 0x97, 0x9E, 0x99, 0x8C, 0x8B, 0x82, 0x85,
+ 0xA8, 0xAF, 0xA6, 0xA1, 0xB4, 0xB3, 0xBA, 0xBD,
+ 0xC7, 0xC0, 0xC9, 0xCE, 0xDB, 0xDC, 0xD5, 0xD2,
+ 0xFF, 0xF8, 0xF1, 0xF6, 0xE3, 0xE4, 0xED, 0xEA,
+ 0xB7, 0xB0, 0xB9, 0xBE, 0xAB, 0xAC, 0xA5, 0xA2,
+ 0x8F, 0x88, 0x81, 0x86, 0x93, 0x94, 0x9D, 0x9A,
+ 0x27, 0x20, 0x29, 0x2E, 0x3B, 0x3C, 0x35, 0x32,
+ 0x1F, 0x18, 0x11, 0x16, 0x03, 0x04, 0x0D, 0x0A,
+ 0x57, 0x50, 0x59, 0x5E, 0x4B, 0x4C, 0x45, 0x42,
+ 0x6F, 0x68, 0x61, 0x66, 0x73, 0x74, 0x7D, 0x7A,
+ 0x89, 0x8E, 0x87, 0x80, 0x95, 0x92, 0x9B, 0x9C,
+ 0xB1, 0xB6, 0xBF, 0xB8, 0xAD, 0xAA, 0xA3, 0xA4,
+ 0xF9, 0xFE, 0xF7, 0xF0, 0xE5, 0xE2, 0xEB, 0xEC,
+ 0xC1, 0xC6, 0xCF, 0xC8, 0xDD, 0xDA, 0xD3, 0xD4,
+ 0x69, 0x6E, 0x67, 0x60, 0x75, 0x72, 0x7B, 0x7C,
+ 0x51, 0x56, 0x5F, 0x58, 0x4D, 0x4A, 0x43, 0x44,
+ 0x19, 0x1E, 0x17, 0x10, 0x05, 0x02, 0x0B, 0x0C,
+ 0x21, 0x26, 0x2F, 0x28, 0x3D, 0x3A, 0x33, 0x34,
+ 0x4E, 0x49, 0x40, 0x47, 0x52, 0x55, 0x5C, 0x5B,
+ 0x76, 0x71, 0x78, 0x7F, 0x6A, 0x6D, 0x64, 0x63,
+ 0x3E, 0x39, 0x30, 0x37, 0x22, 0x25, 0x2C, 0x2B,
+ 0x06, 0x01, 0x08, 0x0F, 0x1A, 0x1D, 0x14, 0x13,
+ 0xAE, 0xA9, 0xA0, 0xA7, 0xB2, 0xB5, 0xBC, 0xBB,
+ 0x96, 0x91, 0x98, 0x9F, 0x8A, 0x8D, 0x84, 0x83,
+ 0xDE, 0xD9, 0xD0, 0xD7, 0xC2, 0xC5, 0xCC, 0xCB,
+ 0xE6, 0xE1, 0xE8, 0xEF, 0xFA, 0xFD, 0xF4, 0xF3
+};
+
+static uint8_t flac_crc8( const uint8_t *data, unsigned len )
+{
+ uint8_t crc = 0;
+
+ while(len--)
+ crc = flac_crc8_table[crc ^ *data++];
+
+ return crc;
+}
+++ /dev/null
-/*****************************************************************************
- * flac.c: flac decoder module making use of libflac
- *****************************************************************************
- * Copyright (C) 1999-2001 VideoLAN
- * $Id: flacdec.c,v 1.5 2003/11/16 21:07:30 gbazin Exp $
- *
- * Authors: Sigmund Augdal <sigmunau@idi.ntnu.no>
- *
- * 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 <string.h> /* memcpy(), memset() */
-#include <errno.h>
-
-#include <vlc/vlc.h>
-#include <vlc/aout.h>
-#include <vlc/decoder.h>
-#include <input_ext-dec.h>
-
-#include <vlc/input.h>
-
-#include <FLAC/stream_decoder.h>
-
-/*****************************************************************************
- * dec_thread_t : flac decoder thread descriptor
- *****************************************************************************/
-typedef struct dec_thread_t
-{
- /*
- * Thread properties
- */
- vlc_thread_t thread_id; /* id for thread functions */
-
- /*
- * Input properties
- */
- decoder_fifo_t *p_fifo; /* stores the PES stream data */
- pes_packet_t *p_pes; /* current PES we are decoding */
- int i_last_pes_pos; /* possition into pes*/
-
- int i_tot;
- /*
- * libflac decoder struct
- */
- FLAC__StreamDecoder *p_decoder;
-
- /*
- * Output properties
- */
- aout_instance_t *p_aout;
- aout_input_t *p_aout_input;
- audio_sample_format_t output_format;
- audio_date_t end_date;
- mtime_t pts;
-
-} dec_thread_t;
-
-static int pi_channels_maps[6] =
-{
- 0,
- AOUT_CHAN_CENTER, AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT,
- AOUT_CHAN_CENTER | AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT,
- AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_REARLEFT
- | AOUT_CHAN_REARRIGHT,
- AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
- | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT
-};
-
-/*****************************************************************************
- * Local prototypes
- *****************************************************************************/
-static int OpenDecoder ( vlc_object_t * );
-static int RunDecoder ( decoder_fifo_t * );
-static void CloseDecoder ( dec_thread_t * );
-
-static FLAC__StreamDecoderReadStatus DecoderReadCallback (const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], unsigned *bytes, void *client_data);
-
-static FLAC__StreamDecoderWriteStatus DecoderWriteCallback (const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 *const buffer[], void *client_data);
-
-static void DecoderMetadataCallback (const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data);
-static void DecoderErrorCallback (const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
-static void Interleave32( int32_t *p_out, const int32_t * const *pp_in,
- int i_nb_channels, int i_samples );
-static void Interleave16( int16_t *p_out, const int32_t * const *pp_in,
- int i_nb_channels, int i_samples );
-static void decoder_state_error( dec_thread_t *p_dec, FLAC__StreamDecoderState state );
-/*****************************************************************************
- * Module descriptor
- *****************************************************************************/
-vlc_module_begin();
- set_description( _("flac audio decoder") );
- set_capability( "decoder", 100 );
- set_callbacks( OpenDecoder, NULL );
-vlc_module_end();
-
-/*****************************************************************************
- * OpenDecoder: probe the decoder and return score
- *****************************************************************************/
-static int OpenDecoder( vlc_object_t *p_this )
-{
- decoder_t *p_dec = (decoder_t*)p_this;
-
- if( p_dec->fmt_in.i_codec != VLC_FOURCC('f','l','a','c') )
- {
- return VLC_EGENERIC;
- }
-
- p_dec->pf_run = RunDecoder;
- return VLC_SUCCESS;
-}
-
-/*****************************************************************************
- * RunDecoder: the vorbis decoder
- *****************************************************************************/
-static int RunDecoder( decoder_fifo_t * p_fifo )
-{
- dec_thread_t *p_dec;
- FLAC__StreamDecoderState state;
- /* Allocate the memory needed to store the thread's structure */
- if( (p_dec = (dec_thread_t *)malloc (sizeof(dec_thread_t)) )
- == NULL)
- {
- msg_Err( p_fifo, "out of memory" );
- goto error;
- }
-
- /* Initialize the thread properties */
- memset( p_dec, 0, sizeof(dec_thread_t) );
- p_dec->p_fifo = p_fifo;
- p_dec->p_pes = NULL;
- p_dec->p_decoder = FLAC__stream_decoder_new();
- if( p_dec->p_decoder == NULL )
- {
- msg_Err( p_fifo, "FLAC__stream_decoder_new() failed" );
- goto error;
- }
- FLAC__stream_decoder_set_read_callback( p_dec->p_decoder,
- DecoderReadCallback );
- FLAC__stream_decoder_set_write_callback( p_dec->p_decoder,
- DecoderWriteCallback );
- FLAC__stream_decoder_set_metadata_callback( p_dec->p_decoder,
- DecoderMetadataCallback );
- FLAC__stream_decoder_set_error_callback( p_dec->p_decoder,
- DecoderErrorCallback );
- FLAC__stream_decoder_set_client_data( p_dec->p_decoder,
- p_dec );
-
-
- FLAC__stream_decoder_init( p_dec->p_decoder );
- if ( !FLAC__stream_decoder_process_until_end_of_metadata( p_dec->p_decoder ) )
- {
- state = FLAC__stream_decoder_get_state( p_dec->p_decoder );
- decoder_state_error( p_dec, state );
- goto error;
- }
-
- aout_DateInit( &p_dec->end_date, p_dec->output_format.i_rate );
- p_dec->p_aout = NULL;
- 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 )
- {
- msg_Err( p_dec->p_fifo, "failed to create aout fifo" );
- goto error;
- }
-
- /* flac decoder thread's main loop */
- while( (!p_dec->p_fifo->b_die) && (!p_dec->p_fifo->b_error) )
- {
- if ( !FLAC__stream_decoder_process_single( p_dec->p_decoder ) )
- {
- state = FLAC__stream_decoder_get_state( p_dec->p_decoder );
- decoder_state_error( p_dec, state );
- }
- }
-
- /* If b_error is set, the vorbis decoder thread enters the error loop */
- if( p_dec->p_fifo->b_error )
- {
- DecoderError( p_dec->p_fifo );
- }
-
- /* End of the vorbis decoder thread */
- CloseDecoder( p_dec );
-
- return 0;
-
- error:
- DecoderError( p_fifo );
- if( p_dec )
- {
- if( p_dec->p_fifo )
- p_dec->p_fifo->b_error = 1;
-
- /* End of the vorbis decoder thread */
- CloseDecoder( p_dec );
- }
-
- return -1;
-}
-
-/*****************************************************************************
- * CloseDecoder: closes the decoder
- *****************************************************************************/
-static void CloseDecoder ( dec_thread_t *p_dec )
-{
- if( p_dec->p_aout_input != NULL )
- {
- aout_DecDelete( p_dec->p_aout, p_dec->p_aout_input );
- }
-
- if( p_dec )
- {
- if( p_dec->p_pes )
- input_DeletePES( p_dec->p_fifo->p_packets_mgt, p_dec->p_pes );
- FLAC__stream_decoder_finish( p_dec->p_decoder );
- FLAC__stream_decoder_delete( p_dec->p_decoder );
- free( p_dec );
- }
-
-}
-
-
-
-/*****************************************************************************
- * DecoderReadCallback: called by libflac when it needs more data
- *****************************************************************************/
-static FLAC__StreamDecoderReadStatus DecoderReadCallback (const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], unsigned *bytes, void *client_data)
-{
- dec_thread_t *p_dec = (dec_thread_t *)client_data;
- if( !p_dec->i_last_pes_pos )
- {
- input_DeletePES( p_dec->p_fifo->p_packets_mgt,
- p_dec->p_pes );
- input_ExtractPES( p_dec->p_fifo, &p_dec->p_pes );
- if( !p_dec->p_pes )
- {
- return FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM;
- }
- }
- p_dec->pts = p_dec->p_pes->i_pts;
- if( ( p_dec->p_pes->i_pes_size - p_dec->i_last_pes_pos ) > *bytes )
- {
- p_dec->p_fifo->p_vlc->pf_memcpy( buffer,
- p_dec->p_pes->p_first->p_payload_start
- + p_dec->i_last_pes_pos,
- *bytes );
- p_dec->i_last_pes_pos += *bytes;
- }
- else
- {
- p_dec->p_fifo->p_vlc->pf_memcpy( buffer,
- p_dec->p_pes->p_first->p_payload_start
- + p_dec->i_last_pes_pos,
- p_dec->p_pes->i_pes_size
- - p_dec->i_last_pes_pos );
- *bytes = p_dec->p_pes->i_pes_size - p_dec->i_last_pes_pos ;
- p_dec->i_last_pes_pos = 0;
- }
- p_dec->i_tot += *bytes;
-
- return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
-}
-
-/*****************************************************************************
- * DecoderWriteCallback: called by libflac to output decoded samples
- *****************************************************************************/
-static FLAC__StreamDecoderWriteStatus DecoderWriteCallback (
- const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame,
- const FLAC__int32 *const buffer[], void *client_data )
-{
- dec_thread_t *p_dec = (dec_thread_t *)client_data;
- int i_samples = frame->header.blocksize;
- aout_buffer_t *p_aout_buffer;
- p_aout_buffer = aout_DecNewBuffer( p_dec->p_aout, p_dec->p_aout_input,
- i_samples );
- if( !p_aout_buffer )
- {
- msg_Err( p_dec->p_fifo, "cannot get aout buffer" );
- p_dec->p_fifo->b_error = 1;
- return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
- }
- switch ( frame->header.bits_per_sample )
- {
- case 16:
- Interleave16( (int16_t *)p_aout_buffer->p_buffer, buffer,
- frame->header.channels, i_samples );
- break;
- default:
- Interleave32( (int32_t *)p_aout_buffer->p_buffer, buffer,
- frame->header.channels, i_samples );
- }
-
- if( p_dec->pts != 0 && p_dec->pts != aout_DateGet( &p_dec->end_date ) )
- {
- aout_DateSet( &p_dec->end_date, p_dec->pts );
- p_dec->pts = 0;
- }
- else if( !aout_DateGet( &p_dec->end_date ) )
- {
- return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
- }
-
- /* Date management */
- p_aout_buffer->start_date = aout_DateGet( &p_dec->end_date );
- p_aout_buffer->end_date = aout_DateIncrement( &p_dec->end_date,
- i_samples );
- aout_DecPlay( p_dec->p_aout, p_dec->p_aout_input, p_aout_buffer );
- return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
-}
-
-/*****************************************************************************
-' * DecoderMetadataCallback: called by libflac to when it encounters metadata
- *****************************************************************************/
-static void DecoderMetadataCallback (const FLAC__StreamDecoder *decoder,
- const FLAC__StreamMetadata *metadata,
- void *client_data)
-{
- dec_thread_t *p_dec = (dec_thread_t *)client_data;
- switch ( metadata->data.stream_info.bits_per_sample )
- {
- case 8:
- p_dec->output_format.i_format = VLC_FOURCC('s','8',' ',' ');
- break;
- case 16:
- p_dec->output_format.i_format = AOUT_FMT_S16_NE;
- break;
- default:
- msg_Dbg( p_dec->p_fifo, "strange bps %d",
- metadata->data.stream_info.bits_per_sample );
- p_dec->output_format.i_format = VLC_FOURCC('f','i','3','2');
- break;
- }
- p_dec->output_format.i_physical_channels =
- p_dec->output_format.i_original_channels =
- pi_channels_maps[metadata->data.stream_info.channels];
- p_dec->output_format.i_rate = metadata->data.stream_info.sample_rate;
-
- return;
-}
-
-/*****************************************************************************
- * DecoderErrorCallback: called when the libflac decoder encounters an error
- *****************************************************************************/
-static void DecoderErrorCallback (const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
-{
- dec_thread_t *p_dec = (dec_thread_t *)client_data;
- switch ( status )
- {
- case FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC :
- msg_Err( p_dec->p_fifo, "An error in the stream caused the decoder to lose synchronization.");
- break;
-
- case FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER :
- msg_Err( p_dec->p_fifo, "The decoder encountered a corrupted frame header.");
- break;
-
- case FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH :
- msg_Err( p_dec->p_fifo, "The frame's data did not match the CRC in the footer.");
- break;
- default:
- msg_Err( p_dec->p_fifo, "got decoder error: %d", status );
- }
- return;
-}
-
-/*****************************************************************************
- * Interleave: helper function to interleave channels
- *****************************************************************************/
-static void Interleave32( int32_t *p_out, const int32_t * const *pp_in,
- int i_nb_channels, int i_samples )
-{
- int i, j;
-
- for ( j = 0; j < i_samples; j++ )
- {
- for ( i = 0; i < i_nb_channels; i++ )
- {
- p_out[j * i_nb_channels + i] = pp_in[i][j];
- }
- }
-}
-static void Interleave16( int16_t *p_out, const int32_t * const *pp_in,
- int i_nb_channels, int i_samples )
-{
- int i, j;
-
- for ( j = 0; j < i_samples; j++ )
- {
- for ( i = 0; i < i_nb_channels; i++ )
- {
- p_out[j * i_nb_channels + i] = (int32_t)(pp_in[i][j]);
- }
- }
-}
-
-
-static void decoder_state_error( dec_thread_t *p_dec, FLAC__StreamDecoderState state )
-{
- switch ( state )
- {
- case FLAC__STREAM_DECODER_SEARCH_FOR_METADATA :
- msg_Err( p_dec->p_fifo, "The decoder is ready to search for metadata.");
- break;
- case FLAC__STREAM_DECODER_READ_METADATA :
- msg_Err( p_dec->p_fifo, "The decoder is ready to or is in the process of reading metadata.");
- break;
- case FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC :
- msg_Err( p_dec->p_fifo, "The decoder is ready to or is in the process of searching for the frame sync code.");
- break;
- case FLAC__STREAM_DECODER_READ_FRAME :
- msg_Err( p_dec->p_fifo, "The decoder is ready to or is in the process of reading a frame.");
- break;
- case FLAC__STREAM_DECODER_END_OF_STREAM :
- msg_Err( p_dec->p_fifo, "The decoder has reached the end of the stream.");
- break;
- case FLAC__STREAM_DECODER_ABORTED :
- msg_Err( p_dec->p_fifo, "The decoder was aborted by the read callback.");
- break;
- case FLAC__STREAM_DECODER_UNPARSEABLE_STREAM :
- msg_Err( p_dec->p_fifo, "The decoder encountered reserved fields in use in the stream.");
- FLAC__stream_decoder_flush( p_dec->p_decoder );
- break;
- case FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR :
- msg_Err( p_dec->p_fifo, "An error occurred allocating memory.");
- break;
- case FLAC__STREAM_DECODER_ALREADY_INITIALIZED :
- msg_Err( p_dec->p_fifo, "FLAC__stream_decoder_init() was called when the decoder was already initialized, usually because FLAC__stream_decoder_finish() was not called.");
- break;
- case FLAC__STREAM_DECODER_INVALID_CALLBACK :
- msg_Err( p_dec->p_fifo, "FLAC__stream_decoder_init() was called without all callbacks being set.");
- break;
- case FLAC__STREAM_DECODER_UNINITIALIZED :
- msg_Err( p_dec->p_fifo, "The decoder is in the uninitialized state.");
- break;
- default:
- msg_Err(p_dec->p_fifo, "unknown error" );
- }
-}
/*****************************************************************************
- * flac.c : FLAC demuc module for vlc
+ * flac.c : FLAC demux module for vlc
*****************************************************************************
* Copyright (C) 2001 VideoLAN
- * $Id: flac.c,v 1.5 2003/09/07 22:48:29 fenrir Exp $
+ * $Id: flac.c,v 1.6 2003/11/21 01:45:48 gbazin Exp $
*
- * Authors: Sigmund Augdal <sigmunau@idi.ntnu.no>
+ * Authors: Gildas Bazin <gbazin@netcourrier.com>
*
* 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
/*****************************************************************************
* Preamble
*****************************************************************************/
-#include <stdlib.h> /* malloc(), free() */
-#include <string.h> /* strdup() */
-#include <errno.h>
-
#include <vlc/vlc.h>
#include <vlc/input.h>
+#include <vlc_codec.h>
-#include <sys/types.h>
-
-/*****************************************************************************
- * Constants
- *****************************************************************************/
+#define STREAMINFO_SIZE 38
#define FLAC_PACKET_SIZE 16384
-#define MAX_PACKETS_IN_FIFO 1
/*****************************************************************************
* Local prototypes
*****************************************************************************/
-static int Init ( vlc_object_t * );
+static int Open ( vlc_object_t * );
+static void Close ( vlc_object_t * );
static int Demux ( input_thread_t * );
+struct demux_sys_t
+{
+ vlc_bool_t b_start;
+ es_out_id_t *p_es;
+
+ /* Packetizer */
+ decoder_t *p_packetizer;
+};
+
/*****************************************************************************
* Module descriptor
*****************************************************************************/
vlc_module_begin();
set_description( _("flac demuxer") );
set_capability( "demux", 155 );
- set_callbacks( Init, NULL );
+ set_callbacks( Open, Close );
add_shortcut( "flac" );
vlc_module_end();
/*****************************************************************************
- * Init: initializes ES structures
+ * Open: initializes ES structures
*****************************************************************************/
-static int Init( vlc_object_t * p_this )
+static int Open( vlc_object_t * p_this )
{
- input_thread_t * p_input = (input_thread_t *)p_this;
- es_descriptor_t * p_es;
- byte_t * p_peek;
-
- /* Initialize access plug-in structures. */
- if( p_input->i_mtu == 0 )
- {
- /* Improve speed. */
- p_input->i_bufsize = INPUT_DEFAULT_BUFSIZE;
- }
+ input_thread_t *p_input = (input_thread_t *)p_this;
+ demux_sys_t *p_sys;
+ int i_peek;
+ byte_t * p_peek;
+ es_format_t fmt;
p_input->pf_demux = Demux;
p_input->pf_demux_control = demux_vaControlDefault;
{
/* Stream shorter than 4 bytes... */
msg_Err( p_input, "cannot peek()" );
- return( -1 );
+ return VLC_EGENERIC;
}
- if( *p_peek != 'f' || *(p_peek + 1) != 'L' || *(p_peek +2) != 'a'
- || *(p_peek+3) != 'C')
+ if( p_peek[0]!='f' || p_peek[1]!='L' || p_peek[2]!='a' || p_peek[3]!='C' )
{
- if( *p_input->psz_demux && !strncmp( p_input->psz_demux, "flac", 4 ) )
+ if( p_input->psz_demux && !strncmp( p_input->psz_demux, "flac", 4 ) )
{
/* User forced */
- msg_Err( p_input, "this doesn't look like an flac stream, "
+ msg_Err( p_input, "this doesn't look like a flac stream, "
"continuing anyway" );
}
else
{
msg_Warn( p_input, "flac module discarded (no startcode)" );
- return( -1 );
+ return VLC_EGENERIC;
}
}
- if( input_InitStream( p_input, 0 ) == -1 )
+ p_input->p_demux_data = p_sys = malloc( sizeof( demux_sys_t ) );
+ es_format_Init( &fmt, AUDIO_ES, VLC_FOURCC( 'f', 'l', 'a', 'c' ) );
+ p_sys->b_start = VLC_TRUE;
+
+ /* Skip stream marker */
+ stream_Read( p_input->s, NULL, 4 );
+
+ /* We need to read and store the STREAMINFO metadata */
+ i_peek = stream_Peek( p_input->s, &p_peek, 4 );
+ if( p_peek[0] & 0x7F )
+ {
+ msg_Err( p_input, "This isn't a STREAMINFO metadata block" );
+ return VLC_EGENERIC;
+ }
+
+ if( ((p_peek[1]<<16)+(p_peek[2]<<8)+p_peek[3]) != (STREAMINFO_SIZE - 4) )
{
- return( -1 );
+ msg_Err( p_input, "Invalid size for a STREAMINFO metadata block" );
+ return VLC_EGENERIC;
}
- input_AddProgram( p_input, 0, 0 );
- p_input->stream.p_selected_program = p_input->stream.pp_programs[0];
+
+ /*
+ * Load the FLAC packetizer
+ */
+ p_sys->p_packetizer = vlc_object_create( p_input, VLC_OBJECT_DECODER );
+ p_sys->p_packetizer->pf_decode = 0;
+ p_sys->p_packetizer->pf_decode_audio = 0;
+ p_sys->p_packetizer->pf_decode_video = 0;
+ p_sys->p_packetizer->pf_decode_sub = 0;
+ p_sys->p_packetizer->pf_packetize = 0;
+ p_sys->p_packetizer->pf_run = 0;
+
+ /* Initialization of decoder structure */
+ es_format_Init( &p_sys->p_packetizer->fmt_in, AUDIO_ES,
+ VLC_FOURCC( 'f', 'l', 'a', 'c' ) );
+
+ /* Store STREAMINFO for the decoder an packetizer */
+ p_sys->p_packetizer->fmt_in.i_extra = fmt.i_extra = STREAMINFO_SIZE;
+ p_sys->p_packetizer->fmt_in.p_extra = malloc( STREAMINFO_SIZE );
+ stream_Read( p_input->s, p_sys->p_packetizer->fmt_in.p_extra,
+ STREAMINFO_SIZE );
+
+ /* Fake this a the last metadata block */
+ ((uint8_t*)p_sys->p_packetizer->fmt_in.p_extra)[0] |= 0x80;
+ fmt.p_extra = malloc( STREAMINFO_SIZE );
+ memcpy( fmt.p_extra, p_sys->p_packetizer->fmt_in.p_extra, STREAMINFO_SIZE);
+
+ p_sys->p_packetizer->p_module =
+ module_Need( p_sys->p_packetizer, "packetizer", NULL );
+ if( !p_sys->p_packetizer->p_module )
+ {
+ if( p_sys->p_packetizer->fmt_in.p_extra )
+ free( p_sys->p_packetizer->fmt_in.p_extra );
+
+ vlc_object_destroy( p_sys->p_packetizer );
+ msg_Err( p_input, "cannot find flac packetizer" );
+ return VLC_EGENERIC;
+ }
+
+ /* Create one program */
vlc_mutex_lock( &p_input->stream.stream_lock );
- p_es = input_AddES( p_input, p_input->stream.p_selected_program, 1,
- AUDIO_ES, NULL, 0 );
- p_es->i_stream_id = 1;
- p_es->i_fourcc = VLC_FOURCC('f','l','a','c');
- input_SelectES( p_input, p_es );
- p_input->stream.p_selected_program->b_is_ok = 1;
+ if( input_InitStream( p_input, 0 ) == -1 )
+ {
+ vlc_mutex_unlock( &p_input->stream.stream_lock );
+ msg_Err( p_input, "cannot init stream" );
+ return VLC_EGENERIC;
+ }
+ p_input->stream.i_mux_rate = 0;
vlc_mutex_unlock( &p_input->stream.stream_lock );
- return( 0 );
+ p_sys->p_es = es_out_Add( p_input->p_es_out, &fmt );
+
+ return VLC_SUCCESS;
+}
+
+/*****************************************************************************
+ * Close: frees unused data
+ *****************************************************************************/
+static void Close( vlc_object_t * p_this )
+{
+ input_thread_t *p_input = (input_thread_t*)p_this;
+ demux_sys_t *p_sys = p_input->p_demux_data;
+
+ /* Unneed module */
+ module_Unneed( p_input, p_sys->p_packetizer->p_module );
+
+ if( p_sys->p_packetizer->fmt_in.p_extra )
+ free( p_sys->p_packetizer->fmt_in.p_extra );
+
+ /* Delete the decoder */
+ vlc_object_destroy( p_sys->p_packetizer );
+
+ free( p_sys );
}
/*****************************************************************************
*****************************************************************************/
static int Demux( input_thread_t * p_input )
{
- ssize_t i_read;
- decoder_fifo_t * p_fifo =
- p_input->stream.p_selected_program->pp_es[0]->p_decoder_fifo;
- pes_packet_t * p_pes;
- data_packet_t * p_data;
+ demux_sys_t *p_sys = p_input->p_demux_data;
+ block_t *p_block_in, *p_block_out;
- if( p_fifo == NULL )
+ if( !( p_block_in = stream_Block( p_input->s, FLAC_PACKET_SIZE ) ) )
{
- return -1;
+ return 0;
}
- i_read = input_SplitBuffer( p_input, &p_data, FLAC_PACKET_SIZE );
-
- if ( i_read <= 0 )
+ if( p_sys->b_start )
{
- return i_read;
+ p_block_in->i_pts = p_block_in->i_dts = 1;
+ p_sys->b_start = VLC_FALSE;
}
-
- p_pes = input_NewPES( p_input->p_method_data );
-
- if( p_pes == NULL )
+ else
{
- msg_Err( p_input, "out of memory" );
- input_DeletePacket( p_input->p_method_data, p_data );
- return( -1 );
+ p_block_in->i_pts = p_block_in->i_dts = 0;
}
- 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;
-
- vlc_mutex_lock( &p_fifo->data_lock );
- if( p_fifo->i_depth >= MAX_PACKETS_IN_FIFO )
+ while( (p_block_out = p_sys->p_packetizer->pf_packetize(
+ p_sys->p_packetizer, &p_block_in )) )
{
- /* Wait for the decoder. */
- vlc_cond_wait( &p_fifo->data_wait, &p_fifo->data_lock );
- }
- vlc_mutex_unlock( &p_fifo->data_lock );
+ while( p_block_out )
+ {
+ block_t *p_next = p_block_out->p_next;
- if( (p_input->stream.p_selected_program->i_synchro_state == SYNCHRO_REINIT)
- |(p_input->stream.p_selected_program->i_synchro_state == SYNCHRO_START)
- | (input_ClockManageControl( p_input,
- p_input->stream.p_selected_program,
- (mtime_t)0 ) == PAUSE_S) )
- {
- msg_Warn( p_input, "synchro reinit" );
- p_pes->i_pts = mdate() + DEFAULT_PTS_DELAY;
- p_input->stream.p_selected_program->i_synchro_state = SYNCHRO_OK;
- }
+ input_ClockManageRef( p_input,
+ p_input->stream.p_selected_program,
+ p_block_out->i_pts * 9 / 100 );
+
+ p_block_in->b_discontinuity = 0;
+ p_block_out->i_dts = p_block_out->i_pts =
+ input_ClockGetTS( p_input, p_input->stream.p_selected_program,
+ p_block_out->i_pts * 9 / 100 );
+
+ es_out_Send( p_input->p_es_out, p_sys->p_es, p_block_out );
- input_DecodePES( p_fifo, p_pes );
+ p_block_out = p_next;
+ }
+ }
return 1;
}
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