[81392c]: src / post / audio / upmix_mono.c  Maximize  Restore  History

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/*
* Copyright (C) 2000-2004 the xine project
*
* This file is part of xine, a free video player.
*
* xine 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.
*
* xine 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
*
* Upmix audio filter for xine.
* (c) 2004 James Courtier-Dutton (James@superbug.demon.co.uk)
* This is an up-mix audio filter post plugin.
* It simply converts Mono into Stereo.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#define LOG_MODULE "upmix_mono"
#define LOG_VERBOSE
/*
#define LOG
*/
#include "xineutils.h"
#include "post.h"
#include "audio_filters.h"
typedef struct upmix_mono_parameters_s {
int channel;
} upmix_mono_parameters_t;
/*
* description of params struct
*/
START_PARAM_DESCR( upmix_mono_parameters_t )
PARAM_ITEM( POST_PARAM_TYPE_INT, channel, NULL, -1, 5, 0,
"Select channel to upmix (duplicate) to stereo" )
END_PARAM_DESCR( param_descr )
typedef struct post_plugin_upmix_mono_s post_plugin_upmix_mono_t;
typedef struct post_class_upmix_mono_s post_class_upmix_mono_t;
struct post_class_upmix_mono_s {
post_class_t post_class;
xine_t *xine;
};
struct post_plugin_upmix_mono_s {
post_plugin_t post;
/* private data */
int channels;
upmix_mono_parameters_t params;
xine_post_in_t params_input;
int params_changed;
pthread_mutex_t lock;
};
/**************************************************************************
* upmix_mono parameters functions
*************************************************************************/
static int set_parameters (xine_post_t *this_gen, void *param_gen) {
post_plugin_upmix_mono_t *this = (post_plugin_upmix_mono_t *)this_gen;
upmix_mono_parameters_t *param = (upmix_mono_parameters_t *)param_gen;
pthread_mutex_lock (&this->lock);
memcpy( &this->params, param, sizeof(upmix_mono_parameters_t) );
this->params_changed = 1;
pthread_mutex_unlock (&this->lock);
return 1;
}
static int get_parameters (xine_post_t *this_gen, void *param_gen) {
post_plugin_upmix_mono_t *this = (post_plugin_upmix_mono_t *)this_gen;
upmix_mono_parameters_t *param = (upmix_mono_parameters_t *)param_gen;
pthread_mutex_lock (&this->lock);
memcpy( param, &this->params, sizeof(upmix_mono_parameters_t) );
pthread_mutex_unlock (&this->lock);
return 1;
}
static xine_post_api_descr_t * get_param_descr (void) {
return &param_descr;
}
static char * get_help (void) {
return _("This filter will upmix a mono stream to stereo, by "
"duplicating channels. Alternatively, one may use this "
"plugin to listen just one channel of a given stream.\n"
);
}
static xine_post_api_t post_api = {
set_parameters,
get_parameters,
get_param_descr,
get_help,
};
/**************************************************************************
* xine audio post plugin functions
*************************************************************************/
static int upmix_mono_port_open(xine_audio_port_t *port_gen, xine_stream_t *stream,
uint32_t bits, uint32_t rate, int mode) {
post_audio_port_t *port = (post_audio_port_t *)port_gen;
post_plugin_upmix_mono_t *this = (post_plugin_upmix_mono_t *)port->post;
uint32_t capabilities;
_x_post_rewire(&this->post);
_x_post_inc_usage(port);
port->stream = stream;
port->bits = bits;
port->rate = rate;
port->mode = mode;
this->channels = _x_ao_mode2channels(mode);
capabilities = port->original_port->get_capabilities(port->original_port);
if (this->channels == 1 && (capabilities & AO_CAP_MODE_STEREO)) {
xprintf(stream->xine, XINE_VERBOSITY_LOG,
_(LOG_MODULE ": upmixing Mono to Stereo.\n"));
mode = AO_CAP_MODE_STEREO;
} else {
if ( this->channels != 1)
xprintf(stream->xine, XINE_VERBOSITY_LOG,
ngettext(LOG_MODULE ": upmixing a single channel from original %d channel stream.\n",
LOG_MODULE ": upmixing a single channel from original %d channels stream.\n",
this->channels), this->channels);
else {
xprintf(stream->xine, XINE_VERBOSITY_LOG,
_(LOG_MODULE ": audio device not capable of AO_CAP_MODE_STEREO.\n"));
this->channels = 0;
}
}
return (port->original_port->open) (port->original_port, stream, bits, rate, mode);
}
static void upmix_mono_port_put_buffer(xine_audio_port_t *port_gen,
audio_buffer_t *buf, xine_stream_t *stream) {
post_audio_port_t *port = (post_audio_port_t *)port_gen;
post_plugin_upmix_mono_t *this = (post_plugin_upmix_mono_t *)port->post;
pthread_mutex_lock (&this->lock);
if (this->channels == 1)
{
audio_buffer_t *buf0 = port->original_port->get_buffer(port->original_port);
audio_buffer_t *buf1 = port->original_port->get_buffer(port->original_port);
buf0->num_frames = buf->num_frames / 2;
buf1->num_frames = buf->num_frames - (buf->num_frames / 2);
buf0->vpts = buf->vpts;
buf1->vpts = 0;
buf0->frame_header_count = buf->frame_header_count;
buf1->frame_header_count = buf->frame_header_count;
buf0->first_access_unit = buf->first_access_unit;
buf1->first_access_unit = buf->first_access_unit;
/* FIXME: The audio buffer should contain this info.
* We should not have to get it from the open call.
*/
buf0->format.bits = buf->format.bits;
buf1->format.bits = buf->format.bits;
buf0->format.rate = buf->format.rate;
buf1->format.rate = buf->format.rate;
buf0->format.mode = AO_CAP_MODE_STEREO;
buf1->format.mode = AO_CAP_MODE_STEREO;
_x_extra_info_merge(buf0->extra_info, buf->extra_info);
_x_extra_info_merge(buf1->extra_info, buf->extra_info);
{
const size_t step = buf->format.bits / 8;
uint8_t *src = (uint8_t *)buf->mem;
uint8_t *dst0 = (uint8_t *)buf0->mem;
uint8_t *dst1 = (uint8_t *)buf1->mem;
int i;
for (i = 0; i < buf->num_frames / 2; i++)
{
memcpy(dst0, src, step);
dst0 += step;
memcpy(dst0, src, step);
dst0 += step;
src += step;
}
for (i = buf->num_frames / 2; i < buf->num_frames; i++)
{
memcpy(dst1, src, step);
dst1 += step;
memcpy(dst1, src, step);
dst1 += step;
src += step;
}
}
/* pass data to original port */
port->original_port->put_buffer(port->original_port, buf0, stream);
port->original_port->put_buffer(port->original_port, buf1, stream);
/* free data from origial buffer */
buf->num_frames = 0; /* UNDOCUMENTED, but hey, it works! Force old audio_out buffer free. */
}
else if (this->channels && this->params.channel >= 0)
{
audio_buffer_t *buf0 = port->original_port->get_buffer(port->original_port);
buf0->num_frames = buf->num_frames;
buf0->vpts = buf->vpts;
buf0->frame_header_count = buf->frame_header_count;
buf0->first_access_unit = buf->first_access_unit;
/* FIXME: The audio buffer should contain this info.
* We should not have to get it from the open call.
*/
buf0->format.bits = buf->format.bits;
buf0->format.rate = buf->format.rate;
buf0->format.mode = AO_CAP_MODE_STEREO;
_x_extra_info_merge(buf0->extra_info, buf->extra_info);
{
const size_t step = buf->format.bits / 8;
uint8_t *src = (uint8_t *)buf->mem;
uint8_t *dst0 = (uint8_t *)buf0->mem;
int cur_channel = this->params.channel;
int i, j;
if( cur_channel >= this->channels )
cur_channel = this->channels-1;
src += cur_channel * step;
for (i = 0; i < buf->num_frames; i++)
{
for (j = 0; j < this->channels; j++ )
{
memcpy(dst0, src, step);
dst0 += step;
}
src += this->channels * step;
}
}
/* pass data to original port */
port->original_port->put_buffer(port->original_port, buf0, stream);
/* free data from origial buffer */
buf->num_frames = 0; /* UNDOCUMENTED, but hey, it works! Force old audio_out buffer free. */
}
pthread_mutex_unlock (&this->lock);
port->original_port->put_buffer(port->original_port, buf, stream);
return;
}
static void upmix_mono_dispose(post_plugin_t *this_gen)
{
post_plugin_upmix_mono_t *this = (post_plugin_upmix_mono_t *)this_gen;
if (_x_post_dispose(this_gen))
free(this);
}
/* plugin class functions */
static post_plugin_t *upmix_mono_open_plugin(post_class_t *class_gen, int inputs,
xine_audio_port_t **audio_target,
xine_video_port_t **video_target)
{
post_plugin_upmix_mono_t *this = calloc(1, sizeof(post_plugin_upmix_mono_t));
post_in_t *input;
post_out_t *output;
xine_post_in_t *input_api;
post_audio_port_t *port;
upmix_mono_parameters_t init_params;
if (!this || !audio_target || !audio_target[0]) {
free(this);
return NULL;
}
_x_post_init(&this->post, 1, 0);
init_params.channel = -1;
pthread_mutex_init (&this->lock, NULL);
set_parameters (&this->post.xine_post, &init_params);
port = _x_post_intercept_audio_port(&this->post, audio_target[0], &input, &output);
port->new_port.open = upmix_mono_port_open;
port->new_port.put_buffer = upmix_mono_port_put_buffer;
input_api = &this->params_input;
input_api->name = "parameters";
input_api->type = XINE_POST_DATA_PARAMETERS;
input_api->data = &post_api;
xine_list_push_back(this->post.input, input_api);
this->post.xine_post.audio_input[0] = &port->new_port;
this->post.dispose = upmix_mono_dispose;
return &this->post;
}
static char *upmix_mono_get_identifier(post_class_t *class_gen)
{
return "upmix_mono";
}
static char *upmix_mono_get_description(post_class_t *class_gen)
{
return "converts Mono into Stereo";
}
static void upmix_mono_class_dispose(post_class_t *class_gen)
{
free(class_gen);
}
/* plugin class initialization function */
void *upmix_mono_init_plugin(xine_t *xine, void *data)
{
post_class_upmix_mono_t *class = (post_class_upmix_mono_t *)malloc(sizeof(post_class_upmix_mono_t));
if (!class)
return NULL;
class->post_class.open_plugin = upmix_mono_open_plugin;
class->post_class.get_identifier = upmix_mono_get_identifier;
class->post_class.get_description = upmix_mono_get_description;
class->post_class.dispose = upmix_mono_class_dispose;
class->xine = xine;
return class;
}

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