X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Faudio_output%2Fcommon.c;h=0c9cda76bc3128136a2c858450ae66c5bf2f82fb;hb=7a87d5768beaecfc8132a875d08b53ec5b780bee;hp=e02813bb8c643d82b7602c9036fc9c7368dbe5cb;hpb=aeade697a0629f3a2520c17e2fbb7e445cfc6b7c;p=vlc diff --git a/src/audio_output/common.c b/src/audio_output/common.c index e02813bb8c..0c9cda76bc 100644 --- a/src/audio_output/common.c +++ b/src/audio_output/common.c @@ -1,8 +1,8 @@ /***************************************************************************** * common.c : audio output management of common data structures ***************************************************************************** - * Copyright (C) 2002 VideoLAN - * $Id: common.c,v 1.16 2003/01/23 17:13:28 massiot Exp $ + * Copyright (C) 2002-2007 the VideoLAN team + * $Id$ * * Authors: Christophe Massiot * @@ -18,32 +18,65 @@ * * 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 /* calloc(), malloc(), free() */ -#include +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif -#include +#include -#include "audio_output.h" +#include +#include #include "aout_internal.h" - +#include "libvlc.h" /* * Instances management (internal and external) */ +#define AOUT_ASSERT_FIFO_LOCKED aout_assert_fifo_locked(p_aout, p_fifo) +static inline void aout_assert_fifo_locked( aout_instance_t * p_aout, aout_fifo_t * p_fifo ) +{ +#ifndef NDEBUG + if( !p_aout ) + return; + + if( p_fifo == &p_aout->output.fifo ) + vlc_assert_locked( &p_aout->output_fifo_lock ); + else + { + int i; + for( i = 0; i < p_aout->i_nb_inputs; i++ ) + { + if( p_fifo == &p_aout->pp_inputs[i]->mixer.fifo) + { + vlc_assert_locked( &p_aout->input_fifos_lock ); + break; + } + } + if( i == p_aout->i_nb_inputs ) + vlc_assert_locked( &p_aout->mixer_lock ); + } +#else + (void)p_aout; + (void)p_fifo; +#endif +} + +/* Local functions */ +static void aout_Destructor( vlc_object_t * p_this ); + /***************************************************************************** * aout_New: initialize aout structure *****************************************************************************/ aout_instance_t * __aout_New( vlc_object_t * p_parent ) { aout_instance_t * p_aout; - vlc_value_t val; /* Allocate descriptor. */ p_aout = vlc_object_create( p_parent, VLC_OBJECT_AOUT ); @@ -53,39 +86,82 @@ aout_instance_t * __aout_New( vlc_object_t * p_parent ) } /* Initialize members. */ - vlc_mutex_init( p_parent, &p_aout->input_fifos_lock ); - vlc_mutex_init( p_parent, &p_aout->mixer_lock ); - vlc_mutex_init( p_parent, &p_aout->output_fifo_lock ); + vlc_mutex_init( &p_aout->input_fifos_lock ); + vlc_mutex_init( &p_aout->mixer_lock ); + vlc_mutex_init( &p_aout->output_fifo_lock ); p_aout->i_nb_inputs = 0; - p_aout->mixer.f_multiplier = 1.0; - p_aout->mixer.b_error = 1; + p_aout->mixer_multiplier = 1.0; + p_aout->p_mixer = NULL; p_aout->output.b_error = 1; p_aout->output.b_starving = 1; var_Create( p_aout, "intf-change", VLC_VAR_BOOL ); - val.b_bool = VLC_TRUE; - var_Set( p_aout, "intf-change", val ); + var_SetBool( p_aout, "intf-change", true ); - vlc_object_attach( p_aout, p_parent->p_vlc ); + vlc_object_set_destructor( p_aout, aout_Destructor ); return p_aout; } /***************************************************************************** - * aout_Delete: destroy aout structure + * aout_Destructor: destroy aout structure *****************************************************************************/ -void aout_Delete( aout_instance_t * p_aout ) +static void aout_Destructor( vlc_object_t * p_this ) { - var_Destroy( p_aout, "intf-change" ); - + aout_instance_t * p_aout = (aout_instance_t *)p_this; vlc_mutex_destroy( &p_aout->input_fifos_lock ); vlc_mutex_destroy( &p_aout->mixer_lock ); vlc_mutex_destroy( &p_aout->output_fifo_lock ); +} - /* Free structure. */ - vlc_object_destroy( p_aout ); +/* Lock ordering rules: + * + * Mixer Input IFIFO OFIFO (< Inner lock) + * Mixer No! N/A Yes Yes + * Input N/A No! Yes N/A + * In FIFOs No! No! No! No! + * Out FIFOs No! N/A Yes No! + * (^ Outer lock) + */ +#ifdef AOUT_DEBUG +/* Lock debugging */ +static __thread unsigned aout_locks = 0; + +void aout_lock (unsigned i) +{ + unsigned allowed; + switch (i) + { + case MIXER_LOCK: + allowed = 0; + break; + case INPUT_LOCK: + allowed = 0; + break; + case OUTPUT_FIFO_LOCK: + allowed = MIXER_LOCK; + break; + case INPUT_FIFO_LOCK: + allowed = MIXER_LOCK|INPUT_LOCK|OUTPUT_FIFO_LOCK; + break; + } + + if (aout_locks & ~allowed) + { + fprintf (stderr, "Illegal audio lock transition (%x -> %x)\n", + aout_locks, aout_locks|i); + vlc_backtrace (); + //abort (); + } + aout_locks |= i; } +void aout_unlock (unsigned i) +{ + assert (aout_locks & i); + aout_locks &= ~i; +} +#endif /* * Formats management (internal and external) @@ -99,7 +175,7 @@ unsigned int aout_FormatNbChannels( const audio_sample_format_t * p_format ) static const uint32_t pi_channels[] = { AOUT_CHAN_CENTER, AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT, AOUT_CHAN_REARCENTER, AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT, - AOUT_CHAN_LFE }; + AOUT_CHAN_MIDDLELEFT, AOUT_CHAN_MIDDLERIGHT, AOUT_CHAN_LFE }; unsigned int i_nb = 0, i; for ( i = 0; i < sizeof(pi_channels)/sizeof(uint32_t); i++ ) @@ -111,44 +187,56 @@ unsigned int aout_FormatNbChannels( const audio_sample_format_t * p_format ) } /***************************************************************************** - * aout_FormatPrepare : compute the number of bytes per frame & frame length + * aout_BitsPerSample : get the number of bits per sample *****************************************************************************/ -void aout_FormatPrepare( audio_sample_format_t * p_format ) +unsigned int aout_BitsPerSample( vlc_fourcc_t i_format ) { - int i_result; - - switch ( p_format->i_format ) + switch( i_format ) { - case VLC_FOURCC('u','8',' ',' '): - case VLC_FOURCC('s','8',' ',' '): - i_result = 1; - break; - - case VLC_FOURCC('u','1','6','l'): - case VLC_FOURCC('s','1','6','l'): - case VLC_FOURCC('u','1','6','b'): - case VLC_FOURCC('s','1','6','b'): - i_result = 2; - break; - - case VLC_FOURCC('f','l','3','2'): - case VLC_FOURCC('f','i','3','2'): - i_result = 4; - break; - - case VLC_FOURCC('s','p','d','i'): - case VLC_FOURCC('a','5','2',' '): - case VLC_FOURCC('d','t','s',' '): - case VLC_FOURCC('m','p','g','a'): - case VLC_FOURCC('m','p','g','3'): + case VLC_CODEC_U8: + case VLC_CODEC_S8: + return 8; + + case VLC_CODEC_U16L: + case VLC_CODEC_S16L: + case VLC_CODEC_U16B: + case VLC_CODEC_S16B: + return 16; + + case VLC_CODEC_U24L: + case VLC_CODEC_S24L: + case VLC_CODEC_U24B: + case VLC_CODEC_S24B: + return 24; + + case VLC_CODEC_S32L: + case VLC_CODEC_S32B: + case VLC_CODEC_FL32: + case VLC_CODEC_FI32: + return 32; + + case VLC_CODEC_FL64: + return 64; + default: /* For these formats the caller has to indicate the parameters * by hand. */ - return; + return 0; } +} - p_format->i_bytes_per_frame = i_result * aout_FormatNbChannels( p_format ); - p_format->i_frame_length = 1; +/***************************************************************************** + * aout_FormatPrepare : compute the number of bytes per frame & frame length + *****************************************************************************/ +void aout_FormatPrepare( audio_sample_format_t * p_format ) +{ + p_format->i_bitspersample = aout_BitsPerSample( p_format->i_format ); + if( p_format->i_bitspersample > 0 ) + { + p_format->i_bytes_per_frame = ( p_format->i_bitspersample / 8 ) + * aout_FormatNbChannels( p_format ); + p_format->i_frame_length = 1; + } } /***************************************************************************** @@ -158,6 +246,8 @@ const char * aout_FormatPrintChannels( const audio_sample_format_t * p_format ) { switch ( p_format->i_physical_channels & AOUT_CHAN_PHYSMASK ) { + case AOUT_CHAN_LEFT: + case AOUT_CHAN_RIGHT: case AOUT_CHAN_CENTER: if ( (p_format->i_original_channels & AOUT_CHAN_CENTER) || (p_format->i_original_channels @@ -197,9 +287,15 @@ const char * aout_FormatPrintChannels( const audio_sample_format_t * p_format ) case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT: return "2F2R"; + case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT + | AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT: + return "2F2M"; case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT: return "3F2R"; + case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER + | AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT: + return "3F2M"; case AOUT_CHAN_CENTER | AOUT_CHAN_LFE: if ( (p_format->i_original_channels & AOUT_CHAN_CENTER) @@ -232,9 +328,23 @@ const char * aout_FormatPrintChannels( const audio_sample_format_t * p_format ) case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE: return "2F2R/LFE"; + case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT + | AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT | AOUT_CHAN_LFE: + return "2F2M/LFE"; case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE: return "3F2R/LFE"; + case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER + | AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT | AOUT_CHAN_LFE: + return "3F2M/LFE"; + case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER + | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT | AOUT_CHAN_MIDDLELEFT + | AOUT_CHAN_MIDDLERIGHT: + return "3F2M2R"; + case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER + | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT | AOUT_CHAN_MIDDLELEFT + | AOUT_CHAN_MIDDLERIGHT | AOUT_CHAN_LFE: + return "3F2M2R/LFE"; } return "ERROR"; @@ -280,9 +390,16 @@ void aout_FormatsPrint( aout_instance_t * p_aout, const char * psz_text, void aout_FifoInit( aout_instance_t * p_aout, aout_fifo_t * p_fifo, uint32_t i_rate ) { + AOUT_ASSERT_FIFO_LOCKED; + + if( i_rate == 0 ) + { + msg_Err( p_aout, "initialising fifo with zero divider" ); + } + p_fifo->p_first = NULL; p_fifo->pp_last = &p_fifo->p_first; - aout_DateInit( &p_fifo->end_date, i_rate ); + date_Init( &p_fifo->end_date, i_rate, 1 ); } /***************************************************************************** @@ -291,19 +408,23 @@ void aout_FifoInit( aout_instance_t * p_aout, aout_fifo_t * p_fifo, void aout_FifoPush( aout_instance_t * p_aout, aout_fifo_t * p_fifo, aout_buffer_t * p_buffer ) { + (void)p_aout; + AOUT_ASSERT_FIFO_LOCKED; + *p_fifo->pp_last = p_buffer; p_fifo->pp_last = &p_buffer->p_next; *p_fifo->pp_last = NULL; /* Enforce the continuity of the stream. */ - if ( aout_DateGet( &p_fifo->end_date ) ) + if ( date_Get( &p_fifo->end_date ) ) { - p_buffer->start_date = aout_DateGet( &p_fifo->end_date ); - p_buffer->end_date = aout_DateIncrement( &p_fifo->end_date, - p_buffer->i_nb_samples ); + p_buffer->i_pts = date_Get( &p_fifo->end_date ); + p_buffer->i_length = date_Increment( &p_fifo->end_date, + p_buffer->i_nb_samples ); + p_buffer->i_length -= p_buffer->i_pts; } else { - aout_DateSet( &p_fifo->end_date, p_buffer->end_date ); + date_Set( &p_fifo->end_date, p_buffer->i_pts + p_buffer->i_length ); } } @@ -315,8 +436,10 @@ void aout_FifoSet( aout_instance_t * p_aout, aout_fifo_t * p_fifo, mtime_t date ) { aout_buffer_t * p_buffer; + (void)p_aout; + AOUT_ASSERT_FIFO_LOCKED; - aout_DateSet( &p_fifo->end_date, date ); + date_Set( &p_fifo->end_date, date ); p_buffer = p_fifo->p_first; while ( p_buffer != NULL ) { @@ -335,13 +458,14 @@ void aout_FifoMoveDates( aout_instance_t * p_aout, aout_fifo_t * p_fifo, mtime_t difference ) { aout_buffer_t * p_buffer; + (void)p_aout; + AOUT_ASSERT_FIFO_LOCKED; - aout_DateMove( &p_fifo->end_date, difference ); + date_Move( &p_fifo->end_date, difference ); p_buffer = p_fifo->p_first; while ( p_buffer != NULL ) { - p_buffer->start_date += difference; - p_buffer->end_date += difference; + p_buffer->i_pts += difference; p_buffer = p_buffer->p_next; } } @@ -351,7 +475,9 @@ void aout_FifoMoveDates( aout_instance_t * p_aout, aout_fifo_t * p_fifo, *****************************************************************************/ mtime_t aout_FifoNextStart( aout_instance_t * p_aout, aout_fifo_t * p_fifo ) { - return aout_DateGet( &p_fifo->end_date ); + (void)p_aout; + AOUT_ASSERT_FIFO_LOCKED; + return date_Get( &p_fifo->end_date ); } /***************************************************************************** @@ -360,7 +486,9 @@ mtime_t aout_FifoNextStart( aout_instance_t * p_aout, aout_fifo_t * p_fifo ) *****************************************************************************/ mtime_t aout_FifoFirstDate( aout_instance_t * p_aout, aout_fifo_t * p_fifo ) { - return p_fifo->p_first ? p_fifo->p_first->start_date : 0; + (void)p_aout; + AOUT_ASSERT_FIFO_LOCKED; + return p_fifo->p_first ? p_fifo->p_first->i_pts : 0; } /***************************************************************************** @@ -369,6 +497,8 @@ mtime_t aout_FifoFirstDate( aout_instance_t * p_aout, aout_fifo_t * p_fifo ) aout_buffer_t * aout_FifoPop( aout_instance_t * p_aout, aout_fifo_t * p_fifo ) { aout_buffer_t * p_buffer; + (void)p_aout; + AOUT_ASSERT_FIFO_LOCKED; p_buffer = p_fifo->p_first; if ( p_buffer == NULL ) return NULL; @@ -387,6 +517,8 @@ aout_buffer_t * aout_FifoPop( aout_instance_t * p_aout, aout_fifo_t * p_fifo ) void aout_FifoDestroy( aout_instance_t * p_aout, aout_fifo_t * p_fifo ) { aout_buffer_t * p_buffer; + (void)p_aout; + AOUT_ASSERT_FIFO_LOCKED; p_buffer = p_fifo->p_first; while ( p_buffer != NULL ) @@ -395,63 +527,236 @@ void aout_FifoDestroy( aout_instance_t * p_aout, aout_fifo_t * p_fifo ) aout_BufferFree( p_buffer ); p_buffer = p_next; } -} - -/* - * Date management (internal and external) - */ + p_fifo->p_first = NULL; + p_fifo->pp_last = &p_fifo->p_first; +} /***************************************************************************** - * aout_DateInit : set the divider of an audio_date_t + * aout_CheckChannelReorder : Check if we need to do some channel re-ordering *****************************************************************************/ -void aout_DateInit( audio_date_t * p_date, uint32_t i_divider ) +int aout_CheckChannelReorder( const uint32_t *pi_chan_order_in, + const uint32_t *pi_chan_order_out, + uint32_t i_channel_mask, + int i_channels, int *pi_chan_table ) { - p_date->date = 0; - p_date->i_divider = i_divider; - p_date->i_remainder = 0; + bool b_chan_reorder = false; + int i, j, k, l; + + if( i_channels > AOUT_CHAN_MAX ) + return false; + + if( pi_chan_order_in == NULL ) + pi_chan_order_in = pi_vlc_chan_order_wg4; + if( pi_chan_order_out == NULL ) + pi_chan_order_out = pi_vlc_chan_order_wg4; + + for( i = 0, j = 0; pi_chan_order_in[i]; i++ ) + { + if( !(i_channel_mask & pi_chan_order_in[i]) ) continue; + + for( k = 0, l = 0; pi_chan_order_in[i] != pi_chan_order_out[k]; k++ ) + { + if( i_channel_mask & pi_chan_order_out[k] ) l++; + } + + pi_chan_table[j++] = l; + } + + for( i = 0; i < i_channels; i++ ) + { + if( pi_chan_table[i] != i ) b_chan_reorder = true; + } + + return b_chan_reorder; } /***************************************************************************** - * aout_DateSet : set the date of an audio_date_t + * aout_ChannelReorder : *****************************************************************************/ -void aout_DateSet( audio_date_t * p_date, mtime_t new_date ) +void aout_ChannelReorder( uint8_t *p_buf, int i_buffer, + int i_channels, const int *pi_chan_table, + int i_bits_per_sample ) { - p_date->date = new_date; - p_date->i_remainder = 0; + uint8_t p_tmp[AOUT_CHAN_MAX * 4]; + int i, j; + + if( i_bits_per_sample == 8 ) + { + for( i = 0; i < i_buffer / i_channels; i++ ) + { + for( j = 0; j < i_channels; j++ ) + { + p_tmp[pi_chan_table[j]] = p_buf[j]; + } + + memcpy( p_buf, p_tmp, i_channels ); + p_buf += i_channels; + } + } + else if( i_bits_per_sample == 16 ) + { + for( i = 0; i < i_buffer / i_channels / 2; i++ ) + { + for( j = 0; j < i_channels; j++ ) + { + p_tmp[2 * pi_chan_table[j]] = p_buf[2 * j]; + p_tmp[2 * pi_chan_table[j] + 1] = p_buf[2 * j + 1]; + } + + memcpy( p_buf, p_tmp, 2 * i_channels ); + p_buf += 2 * i_channels; + } + } + else if( i_bits_per_sample == 24 ) + { + for( i = 0; i < i_buffer / i_channels / 3; i++ ) + { + for( j = 0; j < i_channels; j++ ) + { + p_tmp[3 * pi_chan_table[j]] = p_buf[3 * j]; + p_tmp[3 * pi_chan_table[j] + 1] = p_buf[3 * j + 1]; + p_tmp[3 * pi_chan_table[j] + 2] = p_buf[3 * j + 2]; + } + + memcpy( p_buf, p_tmp, 3 * i_channels ); + p_buf += 3 * i_channels; + } + } + else if( i_bits_per_sample == 32 ) + { + for( i = 0; i < i_buffer / i_channels / 4; i++ ) + { + for( j = 0; j < i_channels; j++ ) + { + p_tmp[4 * pi_chan_table[j]] = p_buf[4 * j]; + p_tmp[4 * pi_chan_table[j] + 1] = p_buf[4 * j + 1]; + p_tmp[4 * pi_chan_table[j] + 2] = p_buf[4 * j + 2]; + p_tmp[4 * pi_chan_table[j] + 3] = p_buf[4 * j + 3]; + } + + memcpy( p_buf, p_tmp, 4 * i_channels ); + p_buf += 4 * i_channels; + } + } } /***************************************************************************** - * aout_DateMove : move forwards or backwards the date of an audio_date_t + * aout_ChannelExtract: *****************************************************************************/ -void aout_DateMove( audio_date_t * p_date, mtime_t difference ) +static inline void ExtractChannel( uint8_t *pi_dst, int i_dst_channels, + const uint8_t *pi_src, int i_src_channels, + int i_sample_count, + const int *pi_selection, int i_bytes ) { - p_date->date += difference; + for( int i = 0; i < i_sample_count; i++ ) + { + for( int j = 0; j < i_dst_channels; j++ ) + memcpy( &pi_dst[j * i_bytes], &pi_src[pi_selection[j] * i_bytes], i_bytes ); + pi_dst += i_dst_channels * i_bytes; + pi_src += i_src_channels * i_bytes; + } } -/***************************************************************************** - * aout_DateGet : get the date of an audio_date_t - *****************************************************************************/ -mtime_t aout_DateGet( const audio_date_t * p_date ) +void aout_ChannelExtract( void *p_dst, int i_dst_channels, + const void *p_src, int i_src_channels, + int i_sample_count, const int *pi_selection, int i_bits_per_sample ) +{ + /* It does not work in place */ + assert( p_dst != p_src ); + + /* Force the compiler to inline for the specific cases so it can optimize */ + if( i_bits_per_sample == 8 ) + ExtractChannel( p_dst, i_dst_channels, p_src, i_src_channels, i_sample_count, pi_selection, 1 ); + else if( i_bits_per_sample == 16 ) + ExtractChannel( p_dst, i_dst_channels, p_src, i_src_channels, i_sample_count, pi_selection, 2 ); + else if( i_bits_per_sample == 24 ) + ExtractChannel( p_dst, i_dst_channels, p_src, i_src_channels, i_sample_count, pi_selection, 3 ); + else if( i_bits_per_sample == 32 ) + ExtractChannel( p_dst, i_dst_channels, p_src, i_src_channels, i_sample_count, pi_selection, 4 ); + else if( i_bits_per_sample == 64 ) + ExtractChannel( p_dst, i_dst_channels, p_src, i_src_channels, i_sample_count, pi_selection, 8 ); +} + +bool aout_CheckChannelExtraction( int *pi_selection, + uint32_t *pi_layout, int *pi_channels, + const uint32_t pi_order_dst[AOUT_CHAN_MAX], + const uint32_t *pi_order_src, int i_channels ) { - return p_date->date; + const uint32_t pi_order_dual_mono[] = { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT }; + uint32_t i_layout = 0; + int i_out = 0; + int pi_index[AOUT_CHAN_MAX]; + + /* */ + if( !pi_order_dst ) + pi_order_dst = pi_vlc_chan_order_wg4; + + /* Detect special dual mono case */ + if( i_channels == 2 && + pi_order_src[0] == AOUT_CHAN_CENTER && pi_order_src[1] == AOUT_CHAN_CENTER ) + { + i_layout |= AOUT_CHAN_DUALMONO; + pi_order_src = pi_order_dual_mono; + } + + /* */ + for( int i = 0; i < i_channels; i++ ) + { + /* Ignore unknown or duplicated channels or not present in output */ + if( !pi_order_src[i] || (i_layout & pi_order_src[i]) ) + continue; + + for( int j = 0; j < AOUT_CHAN_MAX; j++ ) + { + if( pi_order_dst[j] == pi_order_src[i] ) + { + assert( i_out < AOUT_CHAN_MAX ); + pi_index[i_out++] = i; + i_layout |= pi_order_src[i]; + break; + } + } + } + + /* */ + for( int i = 0, j = 0; i < AOUT_CHAN_MAX; i++ ) + { + for( int k = 0; k < i_out; k++ ) + { + if( pi_order_dst[i] == pi_order_src[pi_index[k]] ) + { + pi_selection[j++] = pi_index[k]; + break; + } + } + } + + *pi_layout = i_layout; + *pi_channels = i_out; + + for( int i = 0; i < i_out; i++ ) + { + if( pi_selection[i] != i ) + return true; + } + return i_out == i_channels; } /***************************************************************************** - * aout_DateIncrement : increment the date and return the result, taking - * into account rounding errors + * aout_BufferAlloc: *****************************************************************************/ -mtime_t aout_DateIncrement( audio_date_t * p_date, uint32_t i_nb_samples ) + +aout_buffer_t *aout_BufferAlloc(aout_alloc_t *allocation, mtime_t microseconds, + aout_buffer_t *old_buffer) { - mtime_t i_dividend = (mtime_t)i_nb_samples * 1000000; - p_date->date += i_dividend / p_date->i_divider; - p_date->i_remainder += (int)(i_dividend % p_date->i_divider); - if ( p_date->i_remainder >= p_date->i_divider ) + if ( !allocation->b_alloc ) { - /* This is Bresenham algorithm. */ - p_date->date++; - p_date->i_remainder -= p_date->i_divider; + return old_buffer; } - return p_date->date; -} + size_t i_alloc_size = (int)( (uint64_t)allocation->i_bytes_per_sec + * (microseconds) / 1000000 + 1 ); + + return block_Alloc( i_alloc_size ); +}