/*****************************************************************************
* filters.c : audio output filters management
*****************************************************************************
- * Copyright (C) 2002-2007 the VideoLAN team
+ * Copyright (C) 2002-2007 VLC authors and VideoLAN
* $Id$
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
*
- * 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.
*****************************************************************************/
/*****************************************************************************
# include "config.h"
#endif
-#include <vlc_common.h>
-#include <vlc_interface.h>
-
-#ifdef HAVE_ALLOCA_H
-# include <alloca.h>
-#endif
+#include <string.h>
+#include <assert.h>
+#include <vlc_common.h>
+#include <vlc_dialog.h>
+#include <vlc_modules.h>
#include <vlc_aout.h>
-#include "aout_internal.h"
+#include <vlc_filter.h>
+#include <vlc_vout.h> /* for vout_Request */
+#include <vlc_input.h>
+
#include <libvlc.h>
+#include "aout_internal.h"
-/*****************************************************************************
- * FindFilter: find an audio filter for a specific transformation
- *****************************************************************************/
-static aout_filter_t * FindFilter( aout_instance_t * p_aout,
- const audio_sample_format_t * p_input_format,
- const audio_sample_format_t * p_output_format )
+static filter_t *CreateFilter (vlc_object_t *obj, const char *type,
+ const char *name, filter_owner_sys_t *owner,
+ const audio_sample_format_t *infmt,
+ const audio_sample_format_t *outfmt)
{
- static const char typename[] = "audio output";
- aout_filter_t * p_filter;
+ filter_t *filter = vlc_custom_create (obj, sizeof (*filter), type);
+ if (unlikely(filter == NULL))
+ return NULL;
- p_filter = vlc_custom_create( p_aout, sizeof(*p_filter),
- VLC_OBJECT_GENERIC, typename );
+ filter->owner.sys = owner;
+ filter->fmt_in.audio = *infmt;
+ filter->fmt_in.i_codec = infmt->i_format;
+ filter->fmt_out.audio = *outfmt;
+ filter->fmt_out.i_codec = outfmt->i_format;
+ filter->p_module = module_need (filter, type, name, false);
+ if (filter->p_module == NULL)
+ {
+ /* If probing failed, formats shall not have been modified. */
+ assert (AOUT_FMTS_IDENTICAL(&filter->fmt_in.audio, infmt));
+ assert (AOUT_FMTS_IDENTICAL(&filter->fmt_out.audio, outfmt));
+ vlc_object_release (filter);
+ filter = NULL;
+ }
+ else
+ assert (filter->pf_audio_filter != NULL);
+ return filter;
+}
- if ( p_filter == NULL ) return NULL;
- vlc_object_attach( p_filter, p_aout );
+static filter_t *FindConverter (vlc_object_t *obj,
+ const audio_sample_format_t *infmt,
+ const audio_sample_format_t *outfmt)
+{
+ return CreateFilter (obj, "audio converter", NULL, NULL, infmt, outfmt);
+}
- memcpy( &p_filter->input, p_input_format, sizeof(audio_sample_format_t) );
- memcpy( &p_filter->output, p_output_format,
- sizeof(audio_sample_format_t) );
- p_filter->p_module = module_Need( p_filter, "audio filter", NULL, 0 );
- if ( p_filter->p_module == NULL )
+static filter_t *FindResampler (vlc_object_t *obj,
+ const audio_sample_format_t *infmt,
+ const audio_sample_format_t *outfmt)
+{
+ return CreateFilter (obj, "audio resampler", "$audio-resampler", NULL,
+ infmt, outfmt);
+}
+
+/**
+ * Destroys a chain of audio filters.
+ */
+static void aout_FiltersPipelineDestroy(filter_t *const *filters, unsigned n)
+{
+ for( unsigned i = 0; i < n; i++ )
{
- vlc_object_detach( p_filter );
+ filter_t *p_filter = filters[i];
+
+ module_unneed( p_filter, p_filter->p_module );
vlc_object_release( p_filter );
- return NULL;
}
+}
- p_filter->b_continuity = false;
+static filter_t *TryFormat (vlc_object_t *obj, vlc_fourcc_t codec,
+ audio_sample_format_t *restrict fmt)
+{
+ audio_sample_format_t output = *fmt;
+
+ assert (codec != fmt->i_format);
+ output.i_format = codec;
+ aout_FormatPrepare (&output);
- return p_filter;
+ filter_t *filter = FindConverter (obj, fmt, &output);
+ if (filter != NULL)
+ *fmt = output;
+ return filter;
}
-/*****************************************************************************
- * SplitConversion: split a conversion in two parts
- *****************************************************************************
- * Returns the number of conversions required by the first part - 0 if only
- * one conversion was asked.
- * Beware : p_output_format can be modified during this function if the
- * developer passed SplitConversion( toto, titi, titi, ... ). That is legal.
- * SplitConversion( toto, titi, toto, ... ) isn't.
- *****************************************************************************/
-static int SplitConversion( const audio_sample_format_t * p_input_format,
- const audio_sample_format_t * p_output_format,
- audio_sample_format_t * p_middle_format )
+/**
+ * Allocates audio format conversion filters
+ * @param obj parent VLC object for new filters
+ * @param filters table of filters [IN/OUT]
+ * @param count pointer to the number of filters in the table [IN/OUT]
+ * @param max size of filters table [IN]
+ * @param infmt input audio format
+ * @param outfmt output audio format
+ * @return 0 on success, -1 on failure
+ */
+static int aout_FiltersPipelineCreate(vlc_object_t *obj, filter_t **filters,
+ unsigned *count, unsigned max,
+ const audio_sample_format_t *restrict infmt,
+ const audio_sample_format_t *restrict outfmt)
{
- bool b_format =
- (p_input_format->i_format != p_output_format->i_format);
- bool b_rate = (p_input_format->i_rate != p_output_format->i_rate);
- bool b_channels =
- (p_input_format->i_physical_channels
- != p_output_format->i_physical_channels)
- || (p_input_format->i_original_channels
- != p_output_format->i_original_channels);
- int i_nb_conversions = b_format + b_rate + b_channels;
+ aout_FormatsPrint (obj, "conversion:", infmt, outfmt);
+ max -= *count;
+ filters += *count;
+
+ /* There is a lot of second guessing on what the conversion plugins can
+ * and cannot do. This seems hardly avoidable, the conversion problem need
+ * to be reduced somehow. */
+ audio_sample_format_t input = *infmt;
+ unsigned n = 0;
+
+ /* Encapsulate or decode non-linear formats */
+ if (!AOUT_FMT_LINEAR(infmt) && infmt->i_format != outfmt->i_format)
+ {
+ if (n == max)
+ goto overflow;
+
+ filter_t *f = TryFormat (obj, VLC_CODEC_S32N, &input);
+ if (f == NULL)
+ f = TryFormat (obj, VLC_CODEC_FL32, &input);
+ if (f == NULL)
+ {
+ msg_Err (obj, "cannot find %s for conversion pipeline",
+ "decoder");
+ goto error;
+ }
- if ( i_nb_conversions <= 1 ) return 0;
+ filters[n++] = f;
+ }
+ assert (AOUT_FMT_LINEAR(&input));
- memcpy( p_middle_format, p_output_format, sizeof(audio_sample_format_t) );
+ /* Remix channels */
+ if (infmt->i_physical_channels != outfmt->i_physical_channels
+ || infmt->i_original_channels != outfmt->i_original_channels)
+ { /* Remixing currently requires FL32... TODO: S16N */
+ if (input.i_format != VLC_CODEC_FL32)
+ {
+ if (n == max)
+ goto overflow;
- if ( i_nb_conversions == 2 )
- {
- if ( !b_format || !b_channels )
+ filter_t *f = TryFormat (obj, VLC_CODEC_FL32, &input);
+ if (f == NULL)
+ {
+ msg_Err (obj, "cannot find %s for conversion pipeline",
+ "pre-mix converter");
+ goto error;
+ }
+
+ filters[n++] = f;
+ }
+
+ if (n == max)
+ goto overflow;
+
+ audio_sample_format_t output;
+ output.i_format = input.i_format;
+ output.i_rate = input.i_rate;
+ output.i_physical_channels = outfmt->i_physical_channels;
+ output.i_original_channels = outfmt->i_original_channels;
+ aout_FormatPrepare (&output);
+
+ filter_t *f = FindConverter (obj, &input, &output);
+ if (f == NULL)
{
- p_middle_format->i_rate = p_input_format->i_rate;
- aout_FormatPrepare( p_middle_format );
- return 1;
+ msg_Err (obj, "cannot find %s for conversion pipeline",
+ "remixer");
+ goto error;
}
- /* !b_rate */
- p_middle_format->i_physical_channels
- = p_input_format->i_physical_channels;
- p_middle_format->i_original_channels
- = p_input_format->i_original_channels;
- aout_FormatPrepare( p_middle_format );
- return 1;
+ input = output;
+ filters[n++] = f;
}
- /* i_nb_conversion == 3 */
- p_middle_format->i_rate = p_input_format->i_rate;
- aout_FormatPrepare( p_middle_format );
- return 2;
-}
+ /* Resample */
+ if (input.i_rate != outfmt->i_rate)
+ { /* Resampling works with any linear format, but may be ugly. */
+ if (n == max)
+ goto overflow;
-static void ReleaseFilter( aout_filter_t * p_filter )
-{
- module_Unneed( p_filter, p_filter->p_module );
- vlc_object_detach( p_filter );
- vlc_object_release( p_filter );
-}
+ audio_sample_format_t output = input;
+ output.i_rate = outfmt->i_rate;
-/*****************************************************************************
- * aout_FiltersCreatePipeline: create a filters pipeline to transform a sample
- * format to another
- *****************************************************************************
- * pi_nb_filters must be initialized before calling this function
- *****************************************************************************/
-int aout_FiltersCreatePipeline( aout_instance_t * p_aout,
- aout_filter_t ** pp_filters_start,
- int * pi_nb_filters,
- const audio_sample_format_t * p_input_format,
- const audio_sample_format_t * p_output_format )
-{
- aout_filter_t** pp_filters = pp_filters_start + *pi_nb_filters;
- audio_sample_format_t temp_format;
- int i_nb_conversions;
+ filter_t *f = FindConverter (obj, &input, &output);
+ if (f == NULL)
+ {
+ msg_Err (obj, "cannot find %s for conversion pipeline",
+ "resampler");
+ goto error;
+ }
+
+ input = output;
+ filters[n++] = f;
+ }
- if ( AOUT_FMTS_IDENTICAL( p_input_format, p_output_format ) )
+ /* Format */
+ if (input.i_format != outfmt->i_format)
{
- msg_Dbg( p_aout, "no need for any filter" );
- return 0;
+ if (max == 0)
+ goto overflow;
+
+ filter_t *f = TryFormat (obj, outfmt->i_format, &input);
+ if (f == NULL)
+ {
+ msg_Err (obj, "cannot find %s for conversion pipeline",
+ "post-mix converter");
+ goto error;
+ }
+ filters[n++] = f;
}
- aout_FormatsPrint( p_aout, "filter(s)", p_input_format, p_output_format );
+ msg_Dbg (obj, "conversion pipeline complete");
+ *count += n;
+ return 0;
- if( *pi_nb_filters + 1 > AOUT_MAX_FILTERS )
+overflow:
+ msg_Err (obj, "maximum of %u conversion filters reached", max);
+ dialog_Fatal (obj, _("Audio filtering failed"),
+ _("The maximum number of filters (%u) was reached."), max);
+error:
+ aout_FiltersPipelineDestroy (filters, n);
+ return -1;
+}
+
+/**
+ * Filters an audio buffer through a chain of filters.
+ */
+static block_t *aout_FiltersPipelinePlay(filter_t *const *filters,
+ unsigned count, block_t *block)
+{
+ /* TODO: use filter chain */
+ for (unsigned i = 0; (i < count) && (block != NULL); i++)
{
- msg_Err( p_aout, "max filter reached (%d)", AOUT_MAX_FILTERS );
- intf_UserFatal( p_aout, false, _("Audio filtering failed"),
- _("The maximum number of filters (%d) was reached."),
- AOUT_MAX_FILTERS );
- return -1;
+ filter_t *filter = filters[i];
+
+ /* Please note that p_block->i_nb_samples & i_buffer
+ * shall be set by the filter plug-in. */
+ block = filter->pf_audio_filter (filter, block);
}
+ return block;
+}
- /* Try to find a filter to do the whole conversion. */
- pp_filters[0] = FindFilter( p_aout, p_input_format, p_output_format );
- if ( pp_filters[0] != NULL )
+#define AOUT_MAX_FILTERS 10
+
+struct aout_filters
+{
+ filter_t *rate_filter; /**< The filter adjusting samples count
+ (either the scaletempo filter or a resampler) */
+ filter_t *resampler; /**< The resampler */
+ int resampling; /**< Current resampling (Hz) */
+
+ unsigned count; /**< Number of filters */
+ filter_t *tab[AOUT_MAX_FILTERS]; /**< Configured user filters
+ (e.g. equalization) and their conversions */
+};
+
+/** Callback for visualization selection */
+static int VisualizationCallback (vlc_object_t *obj, const char *var,
+ vlc_value_t oldval, vlc_value_t newval,
+ void *data)
+{
+ const char *mode = newval.psz_string;
+
+ if (!*mode)
+ mode = "none";
+ /* FIXME: This ugly hack enforced by visual effect-list, as is the need for
+ * separate "visual" (external) and "audio-visual" (internal) variables...
+ * The visual plugin should have one submodule per effect instead. */
+ if (strcasecmp (mode, "none") && strcasecmp (mode, "goom")
+ && strcasecmp (mode, "projectm") && strcasecmp (mode, "vsxu")
+ && strcasecmp (mode, "glspectrum"))
{
- msg_Dbg( p_aout, "found a filter for the whole conversion" );
- ++*pi_nb_filters;
- return 0;
+ var_Create (obj, "effect-list", VLC_VAR_STRING);
+ var_SetString (obj, "effect-list", mode);
+ mode = "visual";
}
- /* We'll have to split the conversion. We always do the downmixing
- * before the resampling, because the audio decoder can probably do it
- * for us. */
- i_nb_conversions = SplitConversion( p_input_format,
- p_output_format, &temp_format );
- if ( !i_nb_conversions )
+ var_SetString (obj, "audio-visual", mode);
+ aout_InputRequestRestart ((audio_output_t *)obj);
+ (void) var; (void) oldval; (void) data;
+ return VLC_SUCCESS;
+}
+
+vout_thread_t *aout_filter_RequestVout (filter_t *filter, vout_thread_t *vout,
+ video_format_t *fmt)
+{
+ /* NOTE: This only works from aout_filters_t.
+ * If you want to use visualization filters from another place, you will
+ * need to add a new pf_aout_request_vout callback or store a pointer
+ * to aout_request_vout_t inside filter_t (i.e. a level of indirection). */
+ const aout_request_vout_t *req = filter->owner.sys;
+ char *visual = var_InheritString (filter->p_parent, "audio-visual");
+ /* NOTE: Disable recycling to always close the filter vout because OpenGL
+ * visualizations do not use this function to ask for a context. */
+ bool recycle = false;
+ free (visual);
+
+ return req->pf_request_vout (req->p_private, vout, fmt, recycle);
+}
+
+static int AppendFilter(vlc_object_t *obj, const char *type, const char *name,
+ aout_filters_t *restrict filters, const void *owner,
+ audio_sample_format_t *restrict infmt,
+ const audio_sample_format_t *restrict outfmt)
+{
+ const unsigned max = sizeof (filters->tab) / sizeof (filters->tab[0]);
+ if (filters->count >= max)
{
- /* There was only one conversion to do, and we already failed. */
- msg_Err( p_aout, "couldn't find a filter for the conversion" );
+ msg_Err (obj, "maximum of %u filters reached", max);
return -1;
}
- pp_filters[0] = FindFilter( p_aout, p_input_format, &temp_format );
- if ( pp_filters[0] == NULL && i_nb_conversions == 2 )
- {
- /* Try with only one conversion. */
- SplitConversion( p_input_format, &temp_format, &temp_format );
- pp_filters[0] = FindFilter( p_aout, p_input_format, &temp_format );
- }
- if ( pp_filters[0] == NULL )
+ filter_t *filter = CreateFilter (obj, type, name,
+ (void *)owner, infmt, outfmt);
+ if (filter == NULL)
{
- msg_Err( p_aout,
- "couldn't find a filter for the first part of the conversion" );
+ msg_Err (obj, "cannot add user %s \"%s\" (skipped)", type, name);
return -1;
}
- /* We have the first stage of the conversion. Find a filter for
- * the rest. */
- if( *pi_nb_filters + 2 > AOUT_MAX_FILTERS )
+ /* convert to the filter input format if necessary */
+ if (aout_FiltersPipelineCreate (obj, filters->tab, &filters->count,
+ max - 1, infmt, &filter->fmt_in.audio))
{
- ReleaseFilter( pp_filters[0] );
- msg_Err( p_aout, "max filter reached (%d)", AOUT_MAX_FILTERS );
- intf_UserFatal( p_aout, false, _("Audio filtering failed"),
- _("The maximum number of filters (%d) was reached."),
- AOUT_MAX_FILTERS );
+ msg_Err (filter, "cannot add user %s \"%s\" (skipped)", type, name);
+ module_unneed (filter, filter->p_module);
+ vlc_object_release (filter);
return -1;
}
- pp_filters[1] = FindFilter( p_aout, &pp_filters[0]->output,
- p_output_format );
- if ( pp_filters[1] == NULL )
- {
- /* Try to split the conversion. */
- i_nb_conversions = SplitConversion( &pp_filters[0]->output,
- p_output_format, &temp_format );
- if ( !i_nb_conversions )
- {
- ReleaseFilter( pp_filters[0] );
- msg_Err( p_aout,
- "couldn't find a filter for the second part of the conversion" );
- return -1;
- }
- if( *pi_nb_filters + 3 > AOUT_MAX_FILTERS )
- {
- ReleaseFilter( pp_filters[0] );
- msg_Err( p_aout, "max filter reached (%d)", AOUT_MAX_FILTERS );
- intf_UserFatal( p_aout, false, _("Audio filtering failed"),
- _("The maximum number of filters (%d) was reached."),
- AOUT_MAX_FILTERS );
- return -1;
- }
- pp_filters[1] = FindFilter( p_aout, &pp_filters[0]->output,
- &temp_format );
- pp_filters[2] = FindFilter( p_aout, &temp_format,
- p_output_format );
- if ( pp_filters[1] == NULL || pp_filters[2] == NULL )
+ assert (filters->count < max);
+ filters->tab[filters->count] = filter;
+ filters->count++;
+ *infmt = filter->fmt_out.audio;
+ return 0;
+}
+
+#undef aout_FiltersNew
+/**
+ * Sets a chain of audio filters up.
+ * \param obj parent object for the filters
+ * \param infmt chain input format [IN]
+ * \param outfmt chain output format [IN]
+ * \param request_vout visualization video output request callback
+ * \return a filters chain or NULL on failure
+ *
+ * \note
+ * *request_vout (if not NULL) must remain valid until aout_FiltersDelete().
+ *
+ * \bug
+ * If request_vout is non NULL, obj is assumed to be an audio_output_t pointer.
+ */
+aout_filters_t *aout_FiltersNew (vlc_object_t *obj,
+ const audio_sample_format_t *restrict infmt,
+ const audio_sample_format_t *restrict outfmt,
+ const aout_request_vout_t *request_vout)
+{
+ aout_filters_t *filters = malloc (sizeof (*filters));
+ if (unlikely(filters == NULL))
+ return NULL;
+
+ filters->rate_filter = NULL;
+ filters->resampler = NULL;
+ filters->resampling = 0;
+ filters->count = 0;
+
+ /* Prepare format structure */
+ aout_FormatPrint (obj, "input", infmt);
+ audio_sample_format_t input_format = *infmt;
+ audio_sample_format_t output_format = *outfmt;
+
+ /* Callbacks (before reading values and also before return statement) */
+ if (request_vout != NULL)
+ var_AddCallback (obj, "visual", VisualizationCallback, NULL);
+
+ /* Now add user filters */
+ if (!AOUT_FMT_LINEAR(outfmt))
+ { /* Non-linear output: just convert formats, no filters/visu */
+ if (!AOUT_FMTS_IDENTICAL(infmt, outfmt))
{
- ReleaseFilter( pp_filters[0] );
- if ( pp_filters[1] != NULL )
- {
- ReleaseFilter( pp_filters[1] );
- }
- if ( pp_filters[2] != NULL )
+ aout_FormatsPrint (obj, "pass-through:", infmt, outfmt);
+ filters->tab[0] = FindConverter(obj, infmt, outfmt);
+ if (filters->tab[0] == NULL)
{
- ReleaseFilter( pp_filters[2] );
+ msg_Err (obj, "cannot setup pass-through");
+ goto error;
}
- msg_Err( p_aout,
- "couldn't find filters for the second part of the conversion" );
- return -1;
+ filters->count++;
}
- *pi_nb_filters += 3;
- msg_Dbg( p_aout, "found 3 filters for the whole conversion" );
+ return filters;
}
- else
+
+ /* parse user filter lists */
+ if (var_InheritBool (obj, "audio-time-stretch"))
{
- *pi_nb_filters += 2;
- msg_Dbg( p_aout, "found 2 filters for the whole conversion" );
+ if (AppendFilter(obj, "audio filter", "scaletempo",
+ filters, NULL, &input_format, &output_format) == 0)
+ filters->rate_filter = filters->tab[filters->count - 1];
}
- return 0;
-}
-
-/*****************************************************************************
- * aout_FiltersDestroyPipeline: deallocate a filters pipeline
- *****************************************************************************/
-void aout_FiltersDestroyPipeline( aout_instance_t * p_aout,
- aout_filter_t ** pp_filters,
- int i_nb_filters )
-{
- int i;
- (void)p_aout;
+ char *str = var_InheritString (obj, "audio-filter");
+ if (str != NULL)
+ {
+ char *p = str, *name;
+ while ((name = strsep (&p, " :")) != NULL)
+ {
+ AppendFilter(obj, "audio filter", name, filters,
+ NULL, &input_format, &output_format);
+ }
+ free (str);
+ }
- for ( i = 0; i < i_nb_filters; i++ )
+ if (request_vout != NULL)
{
- module_Unneed( pp_filters[i], pp_filters[i]->p_module );
- vlc_object_detach( pp_filters[i] );
- vlc_object_release( pp_filters[i] );
+ char *visual = var_InheritString (obj, "audio-visual");
+ if (visual != NULL && strcasecmp (visual, "none"))
+ AppendFilter(obj, "visualization", visual, filters,
+ request_vout, &input_format, &output_format);
+ free (visual);
}
-}
-/*****************************************************************************
- * aout_FiltersHintBuffers: fill in aout_alloc_t structures to optimize
- * buffer allocations
- *****************************************************************************/
-void aout_FiltersHintBuffers( aout_instance_t * p_aout,
- aout_filter_t ** pp_filters,
- int i_nb_filters, aout_alloc_t * p_first_alloc )
-{
- int i;
+ /* convert to the output format (minus resampling) if necessary */
+ output_format.i_rate = input_format.i_rate;
+ if (aout_FiltersPipelineCreate (obj, filters->tab, &filters->count,
+ AOUT_MAX_FILTERS, &input_format, &output_format))
+ {
+ msg_Err (obj, "cannot setup filtering pipeline");
+ goto error;
+ }
+ input_format = output_format;
+
+ /* insert the resampler */
+ output_format.i_rate = outfmt->i_rate;
+ assert (AOUT_FMTS_IDENTICAL(&output_format, outfmt));
+ filters->resampler = FindResampler (obj, &input_format,
+ &output_format);
+ if (filters->resampler == NULL && input_format.i_rate != outfmt->i_rate)
+ {
+ msg_Err (obj, "cannot setup a resampler");
+ goto error;
+ }
+ if (filters->rate_filter == NULL)
+ filters->rate_filter = filters->resampler;
- (void)p_aout; /* unused */
+ return filters;
- for ( i = i_nb_filters - 1; i >= 0; i-- )
- {
- aout_filter_t * p_filter = pp_filters[i];
+error:
+ aout_FiltersPipelineDestroy (filters->tab, filters->count);
+ if (request_vout != NULL)
+ var_DelCallback (obj, "visual", VisualizationCallback, NULL);
+ free (filters);
+ return NULL;
+}
- int i_output_size = p_filter->output.i_bytes_per_frame
- * p_filter->output.i_rate * AOUT_MAX_INPUT_RATE
- / p_filter->output.i_frame_length;
- int i_input_size = p_filter->input.i_bytes_per_frame
- * p_filter->input.i_rate * AOUT_MAX_INPUT_RATE
- / p_filter->input.i_frame_length;
+#undef aout_FiltersDelete
+/**
+ * Destroys a chain of audio filters.
+ * \param obj object used with aout_FiltersNew()
+ * \param filters chain to be destroyed
+ * \bug
+ * obj must be NULL iff request_vout was NULL in aout_FiltersNew()
+ * (this implies obj is an audio_output_t pointer if non NULL).
+ */
+void aout_FiltersDelete (vlc_object_t *obj, aout_filters_t *filters)
+{
+ if (filters->resampler != NULL)
+ aout_FiltersPipelineDestroy (&filters->resampler, 1);
+ aout_FiltersPipelineDestroy (filters->tab, filters->count);
+ if (obj != NULL)
+ var_DelCallback (obj, "visual", VisualizationCallback, NULL);
+ free (filters);
+}
- p_first_alloc->i_bytes_per_sec = __MAX( p_first_alloc->i_bytes_per_sec,
- i_output_size );
+bool aout_FiltersAdjustResampling (aout_filters_t *filters, int adjust)
+{
+ if (filters->resampler == NULL)
+ return false;
- if ( p_filter->b_in_place )
- {
- p_first_alloc->i_bytes_per_sec = __MAX(
- p_first_alloc->i_bytes_per_sec,
- i_input_size );
- p_filter->output_alloc.i_alloc_type = AOUT_ALLOC_NONE;
- }
- else
- {
- /* We're gonna need a buffer allocation. */
- memcpy( &p_filter->output_alloc, p_first_alloc,
- sizeof(aout_alloc_t) );
- p_first_alloc->i_alloc_type = AOUT_ALLOC_STACK;
- p_first_alloc->i_bytes_per_sec = i_input_size;
- }
- }
+ if (adjust)
+ filters->resampling += adjust;
+ else
+ filters->resampling = 0;
+ return filters->resampling != 0;
}
-/*****************************************************************************
- * aout_FiltersPlay: play a buffer
- *****************************************************************************/
-void aout_FiltersPlay( aout_instance_t * p_aout,
- aout_filter_t ** pp_filters,
- int i_nb_filters, aout_buffer_t ** pp_input_buffer )
+block_t *aout_FiltersPlay (aout_filters_t *filters, block_t *block, int rate)
{
- int i;
+ int nominal_rate = 0;
- for( i = 0; i < i_nb_filters; i++ )
+ if (rate != INPUT_RATE_DEFAULT)
{
- aout_filter_t * p_filter = pp_filters[i];
- aout_buffer_t * p_output_buffer;
-
- /* Resamplers can produce slightly more samples than (i_in_nb *
- * p_filter->output.i_rate / p_filter->input.i_rate) so we need
- * slightly bigger buffers. */
- aout_BufferAlloc( &p_filter->output_alloc,
- ((mtime_t)(*pp_input_buffer)->i_nb_samples + 2)
- * 1000000 / p_filter->input.i_rate,
- *pp_input_buffer, p_output_buffer );
- if( p_output_buffer == NULL )
- return;
-
- /* Please note that p_output_buffer->i_nb_samples & i_nb_bytes
- * shall be set by the filter plug-in. */
- if( (*pp_input_buffer)->i_nb_samples > 0 )
- {
- p_filter->pf_do_work( p_aout, p_filter, *pp_input_buffer,
- p_output_buffer );
- }
- else
- {
- p_output_buffer->i_nb_bytes = 0;
- p_output_buffer->i_nb_samples = 0;
- }
+ filter_t *rate_filter = filters->rate_filter;
- if( !p_filter->b_in_place )
- {
- aout_BufferFree( *pp_input_buffer );
- *pp_input_buffer = p_output_buffer;
- }
+ if (rate_filter == NULL)
+ goto drop; /* Without linear, non-nominal rate is impossible. */
+
+ /* Override input rate */
+ nominal_rate = rate_filter->fmt_in.audio.i_rate;
+ rate_filter->fmt_in.audio.i_rate =
+ (nominal_rate * INPUT_RATE_DEFAULT) / rate;
}
- assert( (*pp_input_buffer) == NULL || (*pp_input_buffer)->i_alloc_type != AOUT_ALLOC_STACK );
-}
+ block = aout_FiltersPipelinePlay (filters->tab, filters->count, block);
+ if (filters->resampler != NULL)
+ { /* NOTE: the resampler needs to run even if resampling is 0.
+ * The decoder and output rates can still be different. */
+ filters->resampler->fmt_in.audio.i_rate += filters->resampling;
+ block = aout_FiltersPipelinePlay (&filters->resampler, 1, block);
+ filters->resampler->fmt_in.audio.i_rate -= filters->resampling;
+ }
+
+ if (nominal_rate != 0)
+ { /* Restore input rate */
+ assert (filters->rate_filter != NULL);
+ filters->rate_filter->fmt_in.audio.i_rate = nominal_rate;
+ }
+ return block;
+drop:
+ block_Release (block);
+ return NULL;
+}
projects / vlc / blobdiff