X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=modules%2Faudio_filter%2Fchannel_mixer%2Fsimple.c;h=59572ebd9e80bb0308de150d5ca8f4a8b231b3a9;hb=7222bb1d253707d8efa720a9f5f131fb31895c5b;hp=8cbd3d2e714c448c8dadf821de31d5d8cb8d2517;hpb=8e394d70cd2a16876f85b424473cf109555dae21;p=vlc diff --git a/modules/audio_filter/channel_mixer/simple.c b/modules/audio_filter/channel_mixer/simple.c index 8cbd3d2e71..59572ebd9e 100644 --- a/modules/audio_filter/channel_mixer/simple.c +++ b/modules/audio_filter/channel_mixer/simple.c @@ -1,178 +1,390 @@ /***************************************************************************** - * simple.c : simple channel mixer plug-in (only 7/7.1/5/5.1 -> Stereo for now) + * simple.c : simple channel mixer plug-in ***************************************************************************** - * Copyright (C) 2002, 2006 the VideoLAN team + * Copyright (C) 2002, 2004, 2006-2009 VLC authors and VideoLAN * $Id$ * * Authors: 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 - * the Free Software Foundation; either version 2 of the License, or + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation; either version 2.1 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. + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Lesser General Public License for more details. * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA. + * You should have received a copy of the GNU Lesser General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA. *****************************************************************************/ /***************************************************************************** * Preamble *****************************************************************************/ -#include /* malloc(), free() */ -#include +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif -#include -#include "audio_output.h" -#include "aout_internal.h" +#include +#include +#include +#include +#include +#include /***************************************************************************** - * Local prototypes + * Module descriptor *****************************************************************************/ -static int Create ( vlc_object_t * ); +static int OpenFilter( vlc_object_t * ); -static void DoWork ( aout_instance_t *, aout_filter_t *, aout_buffer_t *, - aout_buffer_t * ); +vlc_module_begin () + set_description( N_("Audio filter for simple channel mixing") ) + set_category( CAT_AUDIO ) + set_subcategory( SUBCAT_AUDIO_MISC ) + set_capability( "audio converter", 10 ) + set_callbacks( OpenFilter, NULL ) +vlc_module_end () /***************************************************************************** - * Module descriptor + * Local prototypes *****************************************************************************/ -vlc_module_begin(); - set_description( _("Audio filter for simple channel mixing") ); - set_capability( "audio filter", 10 ); - set_category( CAT_AUDIO ); - set_subcategory( SUBCAT_AUDIO_MISC ); - set_callbacks( Create, NULL ); -vlc_module_end(); +static bool IsSupported( const audio_format_t *p_input, const audio_format_t *p_output ); -/***************************************************************************** - * Create: allocate trivial channel mixer - *****************************************************************************/ -static int Create( vlc_object_t *p_this ) +struct filter_sys_t { - aout_filter_t * p_filter = (aout_filter_t *)p_this; + void (*pf_dowork)(filter_t *, block_t *, block_t * ); +}; + +static block_t *Filter( filter_t *, block_t * ); + +static void DoWork_7_x_to_2_0( filter_t * p_filter, block_t * p_in_buf, block_t * p_out_buf ) { + float *p_dest = (float *)p_out_buf->p_buffer; + const float *p_src = (const float *)p_in_buf->p_buffer; + for( int i = p_in_buf->i_nb_samples; i--; ) + { + *p_dest++ = p_src[6] + 0.5 * p_src[0] + p_src[2] / 4 + p_src[4] / 4; + *p_dest++ = p_src[6] + 0.5 * p_src[1] + p_src[3] / 4 + p_src[5] / 4; + + p_src += 7; + + if( p_filter->fmt_in.audio.i_physical_channels & AOUT_CHAN_LFE ) p_src++; + } +} + +static void DoWork_5_x_to_2_0( filter_t * p_filter, block_t * p_in_buf, block_t * p_out_buf ) { + float *p_dest = (float *)p_out_buf->p_buffer; + const float *p_src = (const float *)p_in_buf->p_buffer; + for( int i = p_in_buf->i_nb_samples; i--; ) + { + *p_dest++ = p_src[0] + 0.7071 * (p_src[4] + p_src[2]); + *p_dest++ = p_src[1] + 0.7071 * (p_src[4] + p_src[3]); + + p_src += 5; + + if( p_filter->fmt_in.audio.i_physical_channels & AOUT_CHAN_LFE ) p_src++; + } +} + +static void DoWork_4_0_to_2_0( filter_t * p_filter, block_t * p_in_buf, block_t * p_out_buf ) { + VLC_UNUSED(p_filter); + float *p_dest = (float *)p_out_buf->p_buffer; + const float *p_src = (const float *)p_in_buf->p_buffer; + for( int i = p_in_buf->i_nb_samples; i--; ) + { + *p_dest++ = p_src[2] + p_src[3] + 0.5 * p_src[0]; + *p_dest++ = p_src[2] + p_src[3] + 0.5 * p_src[1]; + p_src += 4; + } +} + +static void DoWork_3_x_to_2_0( filter_t * p_filter, block_t * p_in_buf, block_t * p_out_buf ) { + float *p_dest = (float *)p_out_buf->p_buffer; + const float *p_src = (const float *)p_in_buf->p_buffer; + for( int i = p_in_buf->i_nb_samples; i--; ) + { + *p_dest++ = p_src[2] + 0.5 * p_src[0]; + *p_dest++ = p_src[2] + 0.5 * p_src[1]; + + p_src += 3; - if ( (p_filter->input.i_physical_channels - == p_filter->output.i_physical_channels - && p_filter->input.i_original_channels - == p_filter->output.i_original_channels) - || p_filter->input.i_format != p_filter->output.i_format - || p_filter->input.i_rate != p_filter->output.i_rate - || p_filter->input.i_format != VLC_FOURCC('f','l','3','2') ) + if( p_filter->fmt_in.audio.i_physical_channels & AOUT_CHAN_LFE ) p_src++; + } +} + +static void DoWork_7_x_to_1_0( filter_t * p_filter, block_t * p_in_buf, block_t * p_out_buf ) { + float *p_dest = (float *)p_out_buf->p_buffer; + const float *p_src = (const float *)p_in_buf->p_buffer; + for( int i = p_in_buf->i_nb_samples; i--; ) + { + *p_dest++ = p_src[6] + p_src[0] / 4 + p_src[1] / 4 + p_src[2] / 8 + p_src[3] / 8 + p_src[4] / 8 + p_src[5] / 8; + + p_src += 7; + + if( p_filter->fmt_in.audio.i_physical_channels & AOUT_CHAN_LFE ) p_src++; + } +} + +static void DoWork_5_x_to_1_0( filter_t * p_filter, block_t * p_in_buf, block_t * p_out_buf ) { + float *p_dest = (float *)p_out_buf->p_buffer; + const float *p_src = (const float *)p_in_buf->p_buffer; + for( int i = p_in_buf->i_nb_samples; i--; ) + { + *p_dest++ = 0.7071 * (p_src[0] + p_src[1]) + p_src[4] + 0.5f * (p_src[2] + p_src[3]); + + p_src += 5; + + if( p_filter->fmt_in.audio.i_physical_channels & AOUT_CHAN_LFE ) p_src++; + } +} + +static void DoWork_4_0_to_1_0( filter_t * p_filter, block_t * p_in_buf, block_t * p_out_buf ) { + VLC_UNUSED(p_filter); + float *p_dest = (float *)p_out_buf->p_buffer; + const float *p_src = (const float *)p_in_buf->p_buffer; + for( int i = p_in_buf->i_nb_samples; i--; ) + { + *p_dest++ = p_src[2] + p_src[3] + p_src[0] / 4 + p_src[1] / 4; + p_src += 4; + } +} + +static void DoWork_3_x_to_1_0( filter_t * p_filter, block_t * p_in_buf, block_t * p_out_buf ) { + float *p_dest = (float *)p_out_buf->p_buffer; + const float *p_src = (const float *)p_in_buf->p_buffer; + for( int i = p_in_buf->i_nb_samples; i--; ) + { + *p_dest++ = p_src[2] + p_src[0] / 4 + p_src[1] / 4; + + p_src += 3; + + if( p_filter->fmt_in.audio.i_physical_channels & AOUT_CHAN_LFE ) p_src++; + } +} + +static void DoWork_2_x_to_1_0( filter_t * p_filter, block_t * p_in_buf, block_t * p_out_buf ) { + VLC_UNUSED(p_filter); + float *p_dest = (float *)p_out_buf->p_buffer; + const float *p_src = (const float *)p_in_buf->p_buffer; + for( int i = p_in_buf->i_nb_samples; i--; ) { - return -1; + *p_dest++ = p_src[0] / 2 + p_src[1] / 2; + + p_src += 2; } +} + +static void DoWork_7_x_to_4_0( filter_t * p_filter, block_t * p_in_buf, block_t * p_out_buf ) { + float *p_dest = (float *)p_out_buf->p_buffer; + const float *p_src = (const float *)p_in_buf->p_buffer; + for( int i = p_in_buf->i_nb_samples; i--; ) + { + *p_dest++ = p_src[6] + 0.5 * p_src[0] + p_src[2] / 6; + *p_dest++ = p_src[6] + 0.5 * p_src[1] + p_src[3] / 6; + *p_dest++ = p_src[2] / 6 + p_src[4]; + *p_dest++ = p_src[3] / 6 + p_src[5]; + + p_src += 7; - /* Only conversion to Stereo and 4.0 right now */ - if( p_filter->output.i_physical_channels != - (AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT) - && p_filter->output.i_physical_channels != - ( AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | - AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT) ) - { - return -1; - } + if( p_filter->fmt_in.audio.i_physical_channels & AOUT_CHAN_LFE ) p_src++; + } +} - /* Only from 7/7.1/5/5.1 */ - if( (p_filter->input.i_physical_channels & ~AOUT_CHAN_LFE) != - (AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER | - AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT) && - (p_filter->input.i_physical_channels & ~AOUT_CHAN_LFE) != - (AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER | - AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT | - AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT) ) +static void DoWork_5_x_to_4_0( filter_t * p_filter, block_t * p_in_buf, block_t * p_out_buf ) { + float *p_dest = (float *)p_out_buf->p_buffer; + const float *p_src = (const float *)p_in_buf->p_buffer; + for( int i = p_in_buf->i_nb_samples; i--; ) { - return -1; + *p_dest++ = p_src[0] + p_src[4] * 0.7071; + *p_dest++ = p_src[1] + p_src[4] * 0.7071; + *p_dest++ = p_src[2]; + *p_dest++ = p_src[3]; + + p_src += 5; + + if( p_filter->fmt_in.audio.i_physical_channels & AOUT_CHAN_LFE ) p_src++; } +} + +static void DoWork_7_x_to_5_x( filter_t * p_filter, block_t * p_in_buf, block_t * p_out_buf ) { + float *p_dest = (float *)p_out_buf->p_buffer; + const float *p_src = (const float *)p_in_buf->p_buffer; + for( int i = p_in_buf->i_nb_samples; i--; ) + { + *p_dest++ = p_src[0]; + *p_dest++ = p_src[1]; + *p_dest++ = (p_src[2] + p_src[4]) * 0.5; + *p_dest++ = (p_src[3] + p_src[5]) * 0.5; + *p_dest++ = p_src[6]; - p_filter->pf_do_work = DoWork; - p_filter->b_in_place = 0; + p_src += 7; - return 0; + if( p_filter->fmt_in.audio.i_physical_channels & AOUT_CHAN_LFE && + p_filter->fmt_out.audio.i_physical_channels & AOUT_CHAN_LFE ) + *p_dest++ = *p_src++; + else if( p_filter->fmt_in.audio.i_physical_channels & AOUT_CHAN_LFE ) p_src++; + } } + /***************************************************************************** - * DoWork: convert a buffer + * OpenFilter: *****************************************************************************/ -static void DoWork( aout_instance_t * p_aout, aout_filter_t * p_filter, - aout_buffer_t * p_in_buf, aout_buffer_t * p_out_buf ) +static int OpenFilter( vlc_object_t *p_this ) { - int i_input_nb = aout_FormatNbChannels( &p_filter->input ); - int i_output_nb = aout_FormatNbChannels( &p_filter->output ); - float *p_dest = (float *)p_out_buf->p_buffer; - float *p_src = (float *)p_in_buf->p_buffer; - int i; + filter_t *p_filter = (filter_t *)p_this; + filter_sys_t *p_sys; - p_out_buf->i_nb_samples = p_in_buf->i_nb_samples; - p_out_buf->i_nb_bytes = p_in_buf->i_nb_bytes * i_output_nb / i_input_nb; + audio_format_t fmt_in = p_filter->fmt_in.audio; + audio_format_t fmt_out = p_filter->fmt_out.audio; - if( p_filter->output.i_physical_channels == - (AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT) ) - { - if( p_filter->input.i_physical_channels & AOUT_CHAN_MIDDLELEFT ) - for( i = p_in_buf->i_nb_samples; i--; ) - { - *p_dest = p_src[6] + 0.5 * p_src[0] + p_src[2] / 4 + p_src[4] / 4; - p_dest++; - *p_dest = p_src[6] + 0.5 * p_src[1] + p_src[3] / 4 + p_src[5] / 4; - p_dest++; + fmt_in.i_format = p_filter->fmt_in.i_codec; + fmt_out.i_format = p_filter->fmt_out.i_codec; - p_src += 7; + if( !IsSupported( &fmt_in, &fmt_out ) ) + return VLC_EGENERIC; - if( p_filter->input.i_physical_channels & AOUT_CHAN_LFE ) p_src++; - } - else - for( i = p_in_buf->i_nb_samples; i--; ) - { - *p_dest = p_src[4] + 0.5 * p_src[0] + 0.33 * p_src[2]; - p_dest++; - *p_dest = p_src[4] + 0.5 * p_src[1] + 0.33 * p_src[3]; - p_dest++; + p_filter->p_sys = malloc( sizeof(*p_sys) ); + if( unlikely(!p_filter->p_sys) ) + return VLC_ENOMEM; + + p_filter->pf_audio_filter = Filter; - p_src += 5; + const unsigned i_input_physical = p_filter->fmt_in.audio.i_physical_channels; + const bool b_input_7_0 = (i_input_physical & ~AOUT_CHAN_LFE) == AOUT_CHANS_7_0; + const bool b_input_5_0 = !b_input_7_0 && + ( (i_input_physical & AOUT_CHANS_5_0) == AOUT_CHANS_5_0 || + (i_input_physical & AOUT_CHANS_5_0_MIDDLE) == AOUT_CHANS_5_0_MIDDLE ); + const bool b_input_4_center_rear = !b_input_7_0 && !b_input_5_0 && + (i_input_physical & ~AOUT_CHAN_LFE) == AOUT_CHANS_4_CENTER_REAR; + const bool b_input_3_0 = !b_input_7_0 && !b_input_5_0 && !b_input_4_center_rear && + (i_input_physical & ~AOUT_CHAN_LFE) == AOUT_CHANS_3_0; - if( p_filter->input.i_physical_channels & AOUT_CHAN_LFE ) p_src++; - } + if( p_filter->fmt_out.audio.i_physical_channels == AOUT_CHANS_2_0 ) + { + if( b_input_7_0 ) + p_filter->p_sys->pf_dowork = DoWork_7_x_to_2_0; + else if( b_input_5_0 ) + p_filter->p_sys->pf_dowork = DoWork_5_x_to_2_0; + else if( b_input_4_center_rear ) + p_filter->p_sys->pf_dowork = DoWork_4_0_to_2_0; + else if( b_input_3_0 ) + p_filter->p_sys->pf_dowork = DoWork_3_x_to_2_0; } - else + else if( p_filter->fmt_out.audio.i_physical_channels == AOUT_CHAN_CENTER ) { - if( p_filter->input.i_physical_channels & AOUT_CHAN_MIDDLELEFT ) - for( i = p_in_buf->i_nb_samples; i--; ) - { - *p_dest = p_src[6] + 0.5 * p_src[0] + p_src[2] / 6; - p_dest++; - *p_dest = p_src[6] + 0.5 * p_src[1] + p_src[3] / 6; - p_dest++; - *p_dest = p_src[2] / 6 + p_src[4]; - p_dest++; - *p_dest = p_src[3] / 6 + p_src[5]; - p_dest++; - - p_src += 7; - - if( p_filter->input.i_physical_channels & AOUT_CHAN_LFE ) p_src++; - } + if( b_input_7_0 ) + p_filter->p_sys->pf_dowork = DoWork_7_x_to_1_0; + else if( b_input_5_0 ) + p_filter->p_sys->pf_dowork = DoWork_5_x_to_1_0; + else if( b_input_4_center_rear ) + p_filter->p_sys->pf_dowork = DoWork_4_0_to_1_0; + else if( b_input_3_0 ) + p_filter->p_sys->pf_dowork = DoWork_3_x_to_1_0; else - for( i = p_in_buf->i_nb_samples; i--; ) - { - *p_dest = p_src[4] + 0.5 * p_src[0]; - p_dest++; - *p_dest = p_src[4] + 0.5 * p_src[1]; - p_dest++; - *p_dest = p_src[2]; - p_dest++; - *p_dest = p_src[3]; - p_dest++; + p_filter->p_sys->pf_dowork = DoWork_2_x_to_1_0; + } + else if(p_filter->fmt_out.audio.i_physical_channels == AOUT_CHANS_4_0) + { + if( b_input_7_0 ) + p_filter->p_sys->pf_dowork = DoWork_7_x_to_4_0; + else + p_filter->p_sys->pf_dowork = DoWork_5_x_to_4_0; + } + else + { + assert( b_input_7_0 ); + p_filter->p_sys->pf_dowork = DoWork_7_x_to_5_x; + } - p_src += 5; + return VLC_SUCCESS; +} + +/***************************************************************************** + * Filter: + *****************************************************************************/ +static block_t *Filter( filter_t *p_filter, block_t *p_block ) +{ + filter_sys_t *p_sys = (filter_sys_t *)p_filter->p_sys; + if( !p_block || !p_block->i_nb_samples ) + { + if( p_block ) + block_Release( p_block ); + return NULL; + } + + size_t i_out_size = p_block->i_nb_samples * + p_filter->fmt_out.audio.i_bitspersample * + p_filter->fmt_out.audio.i_channels / 8; + + block_t *p_out = block_Alloc( i_out_size ); + if( !p_out ) + { + msg_Warn( p_filter, "can't get output buffer" ); + block_Release( p_block ); + return NULL; + } + + p_out->i_nb_samples = p_block->i_nb_samples; + p_out->i_dts = p_block->i_dts; + p_out->i_pts = p_block->i_pts; + p_out->i_length = p_block->i_length; + + int i_input_nb = aout_FormatNbChannels( &p_filter->fmt_in.audio ); + int i_output_nb = aout_FormatNbChannels( &p_filter->fmt_out.audio ); + p_out->i_nb_samples = p_block->i_nb_samples; + p_out->i_buffer = p_block->i_buffer * i_output_nb / i_input_nb; + + p_sys->pf_dowork( p_filter, p_block, p_out ); + + block_Release( p_block ); - if( p_filter->input.i_physical_channels & AOUT_CHAN_LFE ) p_src++; - } + return p_out; +} + +/***************************************************************************** + * Helpers: + *****************************************************************************/ +static bool IsSupported( const audio_format_t *p_input, const audio_format_t *p_output ) +{ + if( p_input->i_format != VLC_CODEC_FL32 || + p_input->i_format != p_output->i_format || + p_input->i_rate != p_output->i_rate ) + return false; + if( p_input->i_physical_channels == p_output->i_physical_channels && + p_input->i_original_channels == p_output->i_original_channels ) + { + return false; } + + /* Only conversion to Mono, Stereo and 4.0 right now */ + if( p_output->i_physical_channels != AOUT_CHAN_CENTER && + p_output->i_physical_channels != AOUT_CHANS_2_0 && + p_output->i_physical_channels != AOUT_CHANS_4_0 && + p_output->i_physical_channels != AOUT_CHANS_5_1 ) + { + return false; + } + + /* Only from 7/7.1/5/5.1/3/3.1/2.0 + * XXX 5.X rear and middle are handled the same way */ + if( (p_input->i_physical_channels & ~AOUT_CHAN_LFE) != AOUT_CHANS_7_0 && + (p_input->i_physical_channels & ~AOUT_CHAN_LFE) != AOUT_CHANS_5_0 && + (p_input->i_physical_channels & ~AOUT_CHAN_LFE) != AOUT_CHANS_5_0_MIDDLE && + (p_input->i_physical_channels & ~AOUT_CHAN_LFE) != AOUT_CHANS_3_0 && + (p_input->i_physical_channels & ~AOUT_CHAN_LFE) != AOUT_CHANS_4_CENTER_REAR && + p_input->i_physical_channels != AOUT_CHANS_2_0 ) + { + return false; + } + + /* Only if we downmix */ + if( aout_FormatNbChannels( p_input ) <= aout_FormatNbChannels( p_output ) ) + return false; + + return true; } +