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https://code.videolan.org/videolan/vlc
synced 2024-10-03 01:31:53 +02:00
aout: aout_FiltersNew() can now remap channels
Add the possibility to pass an array of chan orders to the aout_FiltersNew function.
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@ -23,6 +23,8 @@
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#ifndef VLC_AOUT_H
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#define VLC_AOUT_H 1
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#include <assert.h>
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/**
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* \defgroup audio_output Audio output
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* \ingroup output
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@ -175,6 +177,35 @@ struct audio_output
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} event;
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};
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typedef enum
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{
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AOUT_CHANIDX_DISABLE = -1,
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AOUT_CHANIDX_LEFT,
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AOUT_CHANIDX_RIGHT,
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AOUT_CHANIDX_MIDDLELEFT,
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AOUT_CHANIDX_MIDDLERIGHT,
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AOUT_CHANIDX_REARLEFT,
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AOUT_CHANIDX_REARRIGHT,
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AOUT_CHANIDX_REARCENTER,
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AOUT_CHANIDX_CENTER,
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AOUT_CHANIDX_LFE,
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AOUT_CHANIDX_MAX
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} vlc_chan_order_idx_t;
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static_assert(AOUT_CHANIDX_MAX == AOUT_CHAN_MAX, "channel count mismatch");
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#define AOUT_CHAN_REMAP_INIT { \
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AOUT_CHANIDX_LEFT, \
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AOUT_CHANIDX_RIGHT, \
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AOUT_CHANIDX_MIDDLELEFT, \
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AOUT_CHANIDX_MIDDLERIGHT, \
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AOUT_CHANIDX_REARLEFT, \
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AOUT_CHANIDX_REARRIGHT, \
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AOUT_CHANIDX_REARCENTER, \
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AOUT_CHANIDX_CENTER, \
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AOUT_CHANIDX_LFE, \
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}
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/**
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* It describes the audio channel order VLC expect.
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*/
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@ -323,9 +354,10 @@ typedef struct aout_request_vout aout_request_vout_t;
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VLC_API aout_filters_t *aout_FiltersNew(vlc_object_t *,
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const audio_sample_format_t *,
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const audio_sample_format_t *,
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const aout_request_vout_t *) VLC_USED;
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#define aout_FiltersNew(o,inf,outf,rv) \
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aout_FiltersNew(VLC_OBJECT(o),inf,outf,rv)
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const aout_request_vout_t *,
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const int *remap) VLC_USED;
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#define aout_FiltersNew(o,inf,outf,rv,remap) \
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aout_FiltersNew(VLC_OBJECT(o),inf,outf,rv,remap)
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VLC_API void aout_FiltersDelete(vlc_object_t *, aout_filters_t *);
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#define aout_FiltersDelete(o,f) \
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aout_FiltersDelete(VLC_OBJECT(o),f)
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@ -71,7 +71,7 @@ static int transcode_audio_initialize_filters( sout_stream_t *p_stream, sout_str
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if( p_sys->psz_af )
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var_SetString( p_stream, "audio-filter", p_sys->psz_af );
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id->p_af_chain = aout_FiltersNew( p_stream, fmt_last,
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&id->p_encoder->fmt_in.audio, NULL );
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&id->p_encoder->fmt_in.audio, NULL, NULL );
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var_Destroy( p_stream, "audio-filter" );
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var_Destroy( p_stream, "audio-time-stretch" );
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if( id->p_af_chain == NULL )
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@ -95,7 +95,7 @@ int aout_DecNew( audio_output_t *p_aout,
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/* Create the audio filtering "input" pipeline */
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owner->filters = aout_FiltersNew (p_aout, p_format, &owner->mixer_format,
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&owner->request_vout);
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&owner->request_vout, NULL);
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if (owner->filters == NULL)
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{
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aout_OutputDelete (p_aout);
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@ -166,7 +166,7 @@ static int aout_CheckReady (audio_output_t *aout)
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{
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owner->filters = aout_FiltersNew (aout, &owner->input_format,
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&owner->mixer_format,
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&owner->request_vout);
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&owner->request_vout, NULL);
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if (owner->filters == NULL)
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{
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aout_OutputDelete (aout);
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@ -46,13 +46,14 @@ static filter_t *CreateFilter (vlc_object_t *obj, const char *type,
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const char *name, filter_owner_sys_t *owner,
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const audio_sample_format_t *infmt,
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const audio_sample_format_t *outfmt,
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bool const_fmt)
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config_chain_t *cfg, bool const_fmt)
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{
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filter_t *filter = vlc_custom_create (obj, sizeof (*filter), type);
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if (unlikely(filter == NULL))
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return NULL;
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filter->owner.sys = owner;
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filter->p_cfg = cfg;
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filter->fmt_in.audio = *infmt;
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filter->fmt_in.i_codec = infmt->i_format;
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filter->fmt_out.audio = *outfmt;
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@ -92,7 +93,8 @@ static filter_t *FindConverter (vlc_object_t *obj,
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const audio_sample_format_t *infmt,
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const audio_sample_format_t *outfmt)
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{
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return CreateFilter (obj, "audio converter", NULL, NULL, infmt, outfmt, true);
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return CreateFilter (obj, "audio converter", NULL, NULL, infmt, outfmt,
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NULL, true);
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}
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static filter_t *FindResampler (vlc_object_t *obj,
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@ -100,7 +102,7 @@ static filter_t *FindResampler (vlc_object_t *obj,
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const audio_sample_format_t *outfmt)
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{
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return CreateFilter (obj, "audio resampler", "$audio-resampler", NULL,
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infmt, outfmt, true);
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infmt, outfmt, NULL, true);
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}
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/**
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@ -373,7 +375,8 @@ vout_thread_t *aout_filter_RequestVout (filter_t *filter, vout_thread_t *vout,
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static int AppendFilter(vlc_object_t *obj, const char *type, const char *name,
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aout_filters_t *restrict filters, const void *owner,
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audio_sample_format_t *restrict infmt,
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const audio_sample_format_t *restrict outfmt)
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const audio_sample_format_t *restrict outfmt,
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config_chain_t *cfg)
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{
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const unsigned max = sizeof (filters->tab) / sizeof (filters->tab[0]);
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if (filters->count >= max)
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@ -383,7 +386,7 @@ static int AppendFilter(vlc_object_t *obj, const char *type, const char *name,
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}
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filter_t *filter = CreateFilter (obj, type, name,
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(void *)owner, infmt, outfmt, false);
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(void *)owner, infmt, outfmt, cfg, false);
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if (filter == NULL)
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{
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msg_Err (obj, "cannot add user %s \"%s\" (skipped)", type, name);
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@ -407,6 +410,52 @@ static int AppendFilter(vlc_object_t *obj, const char *type, const char *name,
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return 0;
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}
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static int AppendRemapFilter(vlc_object_t *obj, aout_filters_t *restrict filters,
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audio_sample_format_t *restrict infmt,
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const audio_sample_format_t *restrict outfmt,
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const int *wg4_remap)
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{
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char *name;
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config_chain_t *cfg;
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/* The remap audio filter use a different order than wg4 */
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static const uint8_t wg4_to_remap[] = { 0, 2, 6, 7, 3, 5, 4, 1, 8 };
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int remap[AOUT_CHAN_MAX];
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bool needed = false;
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for (int i = 0; i < AOUT_CHAN_MAX; ++i)
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{
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if (wg4_remap[i] != i)
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needed = true;
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remap[i] = wg4_remap[i] >= 0 ? wg4_to_remap[wg4_remap[i]] : -1;
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}
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if (!needed)
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return 0;
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char *str;
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int ret = asprintf(&str, "remap{channel-left=%d,channel-right=%d,"
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"channel-middleleft=%d,channel-middleright=%d,"
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"channel-rearleft=%d,channel-rearright=%d,"
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"channel-rearcenter=%d,channel-center=%d,"
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"channel-lfe=%d,normalize=false}",
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remap[0], remap[1], remap[2], remap[3], remap[4],
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remap[5], remap[6], remap[7], remap[8]);
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if (ret == -1)
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return -1;
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free(config_ChainCreate(&name, &cfg, str));
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if (name != NULL && cfg != NULL)
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ret = AppendFilter(obj, "audio filter", name, filters,
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NULL, infmt, outfmt, cfg);
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else
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ret = -1;
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free(str);
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free(name);
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if (cfg)
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config_ChainDestroy(cfg);
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return ret;
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}
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#undef aout_FiltersNew
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/**
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* Sets a chain of audio filters up.
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@ -414,6 +463,9 @@ static int AppendFilter(vlc_object_t *obj, const char *type, const char *name,
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* \param infmt chain input format [IN]
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* \param outfmt chain output format [IN]
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* \param request_vout visualization video output request callback
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* \param remap a const array of size AOUT_CHAN_MAX or NULL. If not NULL, a
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* remap audio filter will be inserted to remap channels according to the
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* array. The array is in the WG4 order.
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* \return a filters chain or NULL on failure
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*
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* \note
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@ -425,7 +477,8 @@ static int AppendFilter(vlc_object_t *obj, const char *type, const char *name,
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aout_filters_t *aout_FiltersNew (vlc_object_t *obj,
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const audio_sample_format_t *restrict infmt,
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const audio_sample_format_t *restrict outfmt,
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const aout_request_vout_t *request_vout)
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const aout_request_vout_t *request_vout,
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const int *remap)
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{
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aout_filters_t *filters = malloc (sizeof (*filters));
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if (unlikely(filters == NULL))
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@ -492,10 +545,13 @@ aout_filters_t *aout_FiltersNew (vlc_object_t *obj,
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if (var_InheritBool (obj, "audio-time-stretch"))
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{
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if (AppendFilter(obj, "audio filter", "scaletempo",
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filters, NULL, &input_format, &output_format) == 0)
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filters, NULL, &input_format, &output_format, NULL) == 0)
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filters->rate_filter = filters->tab[filters->count - 1];
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}
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if (remap != NULL)
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AppendRemapFilter(obj, filters, &input_format, &output_format, remap);
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/* Now add user filters */
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char *str = var_InheritString (obj, "audio-filter");
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if (str != NULL)
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@ -504,7 +560,7 @@ aout_filters_t *aout_FiltersNew (vlc_object_t *obj,
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while ((name = strsep (&p, " :")) != NULL)
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{
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AppendFilter(obj, "audio filter", name, filters,
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NULL, &input_format, &output_format);
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NULL, &input_format, &output_format, NULL);
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}
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free (str);
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}
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@ -514,7 +570,7 @@ aout_filters_t *aout_FiltersNew (vlc_object_t *obj,
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char *visual = var_InheritString (obj, "audio-visual");
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if (visual != NULL && strcasecmp (visual, "none"))
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AppendFilter(obj, "visualization", visual, filters,
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request_vout, &input_format, &output_format);
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request_vout, &input_format, &output_format, NULL);
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free (visual);
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}
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