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* Resampler plug-in based on CoreAudio's AudioConverter.

This commit is contained in:
Christophe Massiot 2003-03-30 01:13:37 +00:00
parent 912d212ce9
commit 00d327ff2c
4 changed files with 298 additions and 2 deletions
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4
configure.ac.in
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@ -2630,11 +2630,15 @@ AC_ARG_ENABLE(macosx,
[if test "x${enable_macosx}" = "xyes"
then
BUILTINS="${BUILTINS} macosx"
PLUGINS="${PLUGINS} coreaudio_resampler"
LDFLAGS_macosx="${LDFLAGS_macosx} -framework CoreAudio -framework AudioToolbox -framework IOKit -framework Cocoa -framework Carbon -framework QuickTime -lobjc -ObjC"
LDFLAGS_coreaudio_resampler="${LDFLAGS_coreaudio_resampler} -framework AudioToolbox"
fi],
[AC_CHECK_HEADERS(Cocoa/Cocoa.h,
BUILTINS="${BUILTINS} macosx"
PLUGINS="${PLUGINS} coreaudio_resampler"
LDFLAGS_macosx="${LDFLAGS_macosx} -framework CoreAudio -framework AudioToolbox -framework IOKit -framework Cocoa -framework Carbon -framework QuickTime -lobjc -ObjC"
LDFLAGS_coreaudio_resampler="${LDFLAGS_coreaudio_resampler} -framework AudioToolbox"
)])
dnl

1
modules/audio_filter/resampler/Modules.am
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@ -3,3 +3,4 @@ SOURCES_ugly_resampler = modules/audio_filter/resampler/ugly.c
SOURCES_linear_resampler = modules/audio_filter/resampler/linear.c
SOURCES_bandlimited_resampler = modules/audio_filter/resampler/bandlimited.c \
modules/audio_filter/resampler/bandlimited.h
SOURCES_coreaudio_resampler = modules/audio_filter/resampler/coreaudio.c

290
modules/audio_filter/resampler/coreaudio.c Normal file
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@ -0,0 +1,290 @@
/*****************************************************************************
* ugly.c : ugly resampler (changes pitch)
*****************************************************************************
* Copyright (C) 2002 VideoLAN
* $Id: coreaudio.c,v 1.1 2003/03/30 01:13:37 massiot Exp $
*
* Authors: Samuel Hocevar <sam@zoy.org>
*
* 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>
#include <AudioToolbox/AudioConverter.h>
#include <vlc/vlc.h>
#include "audio_output.h"
#include "aout_internal.h"
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static int Create ( vlc_object_t * );
static void Close ( vlc_object_t * );
static void DoWork ( aout_instance_t *, aout_filter_t *, aout_buffer_t *,
aout_buffer_t * );
/*****************************************************************************
* Local structures
*****************************************************************************/
struct aout_filter_sys_t
{
aout_filter_t * p_secondary_resampler;
aout_alloc_t alloc;
AudioStreamBasicDescription s_src_stream_format;
AudioStreamBasicDescription s_dst_stream_format;
AudioConverterRef s_converter;
unsigned int i_first_rate;
};
/*****************************************************************************
* Module descriptor
*****************************************************************************/
vlc_module_begin();
set_description( _("audio filter for ugly resampling") );
set_capability( "audio filter", 50 );
set_callbacks( Create, Close );
vlc_module_end();
/*****************************************************************************
* Create: allocate ugly resampler
*****************************************************************************/
static int Create( vlc_object_t *p_this )
{
aout_filter_t * p_filter = (aout_filter_t *)p_this;
struct aout_filter_sys_t * p_sys = p_filter->p_sys;
unsigned int i_nb_channels;
OSStatus err;
uint32_t i_prop;
unsigned int i_first_rate;
if ( p_filter->input.i_rate == p_filter->output.i_rate
|| p_filter->input.i_format != p_filter->output.i_format
|| 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 != VLC_FOURCC('f','l','3','2') )
{
return VLC_EGENERIC;
}
if ( p_filter->input.i_rate >= 48000 * (100 + AOUT_MAX_RESAMPLING) / 100 )
i_first_rate = 48000;
else
i_first_rate = 44100;
if ( p_filter->output.i_rate == i_first_rate )
{
return VLC_EGENERIC;
}
i_nb_channels = aout_FormatNbChannels( &p_filter->input );
/* Allocate the memory needed to store the module's structure */
p_sys = p_filter->p_sys = malloc( sizeof(struct aout_filter_sys_t) );
if( p_filter->p_sys == NULL )
{
msg_Err( p_filter, "out of memory" );
return VLC_ENOMEM;
}
memset( p_filter->p_sys, 0, sizeof(struct aout_filter_sys_t) );
p_sys->i_first_rate = i_first_rate;
p_sys->s_src_stream_format.mFormatID = kAudioFormatLinearPCM;
p_sys->s_src_stream_format.mFormatFlags
= kLinearPCMFormatFlagIsFloat | kAudioFormatFlagsNativeEndian
| kAudioFormatFlagIsPacked;
p_sys->s_src_stream_format.mBytesPerPacket = i_nb_channels * 4;
p_sys->s_src_stream_format.mFramesPerPacket = 1;
p_sys->s_src_stream_format.mBytesPerFrame = i_nb_channels * 4;
p_sys->s_src_stream_format.mChannelsPerFrame = i_nb_channels;
p_sys->s_src_stream_format.mBitsPerChannel = 32;
memcpy( &p_sys->s_dst_stream_format, &p_sys->s_src_stream_format,
sizeof(AudioStreamBasicDescription) );
p_sys->s_src_stream_format.mSampleRate = p_sys->i_first_rate;
p_sys->s_dst_stream_format.mSampleRate = p_filter->output.i_rate;
err = AudioConverterNew( &p_sys->s_src_stream_format,
&p_sys->s_dst_stream_format,
&p_sys->s_converter );
if( err != noErr )
{
msg_Err( p_filter, "AudioConverterNew failed: [%4.4s]",
(char *)&err );
free(p_sys);
return VLC_EGENERIC;
}
i_prop = kConverterPrimeMethod_None;
err = AudioConverterSetProperty( p_sys->s_converter,
kAudioConverterPrimeMethod, sizeof(i_prop), &i_prop );
if( err != noErr )
{
msg_Err( p_filter, "AudioConverterSetProperty failed: [%4.4s]",
(char *)&err );
free(p_sys);
return VLC_EGENERIC;
}
/* Allocate a secondary resampler for the remainder. */
p_sys->p_secondary_resampler = vlc_object_create( p_filter,
sizeof(aout_filter_t) );
if ( p_sys->p_secondary_resampler == NULL )
{
free(p_sys);
return VLC_EGENERIC;
}
vlc_object_attach( p_sys->p_secondary_resampler, p_filter );
memcpy( &p_sys->p_secondary_resampler->input, &p_filter->input,
sizeof(audio_sample_format_t) );
memcpy( &p_sys->p_secondary_resampler->output, &p_filter->output,
sizeof(audio_sample_format_t) );
p_sys->p_secondary_resampler->p_module
= module_Need( p_sys->p_secondary_resampler, "audio filter",
"ugly_resampler" );
if ( p_sys->p_secondary_resampler->p_module == NULL )
{
vlc_object_detach( p_sys->p_secondary_resampler );
vlc_object_destroy( p_sys->p_secondary_resampler );
free(p_sys);
return VLC_EGENERIC;
}
p_sys->p_secondary_resampler->b_continuity = VLC_FALSE;
p_sys->alloc.i_alloc_type = AOUT_ALLOC_STACK;
p_sys->alloc.i_bytes_per_sec = p_filter->output.i_bytes_per_frame
* p_filter->output.i_rate
/ p_filter->output.i_frame_length;
p_filter->pf_do_work = DoWork;
/* We don't want a new buffer to be created because we're not sure we'll
* actually need to resample anything. */
p_filter->b_in_place = VLC_FALSE;
return VLC_SUCCESS;
}
/*****************************************************************************
* Close: free our resources
*****************************************************************************/
static void Close( vlc_object_t * p_this )
{
aout_filter_t * p_filter = (aout_filter_t *)p_this;
struct aout_filter_sys_t * p_sys = p_filter->p_sys;
OSErr err;
module_Unneed( p_sys->p_secondary_resampler,
p_sys->p_secondary_resampler->p_module );
vlc_object_detach( p_sys->p_secondary_resampler );
vlc_object_destroy( p_sys->p_secondary_resampler );
/* Destroy the AudioConverter */
err = AudioConverterDispose( p_sys->s_converter );
if( err != noErr )
{
msg_Err( p_this, "AudioConverterDispose failed: %u", err );
}
free( p_filter->p_sys );
}
/*****************************************************************************
* DoWork: convert a buffer
*****************************************************************************/
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 )
{
struct aout_filter_sys_t * p_sys = p_filter->p_sys;
int32_t *p_in = (int32_t *)p_in_buf->p_buffer;
int32_t *p_out;
UInt32 i_output_size;
unsigned int i_out_nb, i_wanted_nb, i_new_rate;
OSErr err;
aout_buffer_t * p_middle_buf;
unsigned int i_nb_channels = aout_FormatNbChannels( &p_filter->input );
#if 1
if ( !p_filter->b_continuity )
{
err = AudioConverterReset( p_sys->s_converter );
if( err != noErr )
{
msg_Err( p_filter, "AudioConverterReset failed: [%4.4s]",
(char *)&err );
}
p_filter->b_continuity = VLC_TRUE;
}
#endif
i_out_nb = p_in_buf->i_nb_samples * p_filter->output.i_rate
/ p_sys->i_first_rate;
i_output_size = i_out_nb * 4 * i_nb_channels;
if ( i_output_size > p_out_buf->i_size )
{
aout_BufferAlloc( &p_sys->alloc,
i_out_nb * 1000000 / p_filter->output.i_rate,
NULL, p_middle_buf );
}
else
{
p_middle_buf = p_out_buf;
}
p_out = (int32_t*)p_middle_buf->p_buffer;
err = AudioConverterConvertBuffer( p_sys->s_converter,
p_in_buf->i_nb_samples * 4 * i_nb_channels, p_in,
&i_output_size, p_out );
if( err != noErr )
{
msg_Warn( p_filter, "AudioConverterConvertBuffer failed: [%4.4s] (%u:%u)",
(char *)&err, i_out_nb * 4 * i_nb_channels, i_output_size );
i_output_size = i_out_nb * 4 * i_nb_channels;
memset( p_out, 0, i_output_size );
}
p_middle_buf->i_nb_samples = i_output_size / 4 / i_nb_channels;
p_middle_buf->i_nb_bytes = i_output_size;
p_middle_buf->start_date = p_in_buf->start_date;
p_middle_buf->end_date = p_middle_buf->start_date + p_middle_buf->i_nb_samples *
1000000 / p_filter->output.i_rate;
i_wanted_nb = p_in_buf->i_nb_samples * p_filter->output.i_rate
/ p_filter->input.i_rate;
i_new_rate = p_middle_buf->i_nb_samples * p_filter->output.i_rate
/ i_wanted_nb;
p_sys->p_secondary_resampler->input.i_rate = i_new_rate;
p_sys->p_secondary_resampler->pf_do_work( p_aout,
p_sys->p_secondary_resampler, p_middle_buf, p_out_buf );
if ( p_middle_buf != p_out_buf )
{
aout_BufferFree( p_middle_buf );
}
}

5
src/input/input.c
View File

@ -4,7 +4,7 @@
* decoders.
*****************************************************************************
* Copyright (C) 1998-2002 VideoLAN
* $Id: input.c,v 1.227 2003/03/25 17:07:45 gbazin Exp $
* $Id: input.c,v 1.228 2003/03/30 01:13:37 massiot Exp $
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
*
@ -45,6 +45,7 @@
#include "input_ext-plugins.h"
#include "stream_output.h"
#include <vlc/vout.h>
#include "interface.h"
@ -595,7 +596,7 @@ static void EndThread( input_thread_t * p_input )
{
vlc_object_detach( p_object );
vlc_object_release( p_object );
vout_Destroy( p_object );
vout_Destroy( (vout_thread_t *)p_object );
}
free( p_input->psz_source );