2 ** Copyright (c) 2002-2016, Erik de Castro Lopo <erikd@mega-nerd.com>
3 ** All rights reserved.
5 ** This code is released under 2-clause BSD license. Please see the
21 static SRC_STATE *psrc_set_converter (int converter_type, int channels, int *error) ;
25 src_new (int converter_type, int channels, int *error)  in src_new()  argument
27 	return psrc_set_converter (converter_type, channels, error) ;  in src_new()
43 	SRC_STATE *state = orig->vt->copy (orig) ;
52 src_callback_new (src_callback_t func, int converter_type, int channels, int *error, void* cb_data)
64 	if ((state = src_new (converter_type, channels, error)) == NULL)
69 	state->mode = SRC_MODE_CALLBACK ;
70 	state->callback_func = func ;
71 	state->user_callback_data = cb_data ;
81 		state->vt->close (state) ;  in src_delete()
94 	if (state->mode != SRC_MODE_PROCESS)  in src_process()
102 	if ((data->data_in == NULL && data->input_frames > 0)  in src_process()
103 			|| (data->data_out == NULL && data->output_frames > 0))  in src_process()
107 	if (is_bad_src_ratio (data->src_ratio))  in src_process()
110 	if (data->input_frames < 0)  in src_process()
111 		data->input_frames = 0 ;  in src_process()
112 	if (data->output_frames < 0)  in src_process()
113 		data->output_frames = 0 ;  in src_process()
115 	if (data->data_in < data->data_out)  in src_process()
116 	{	if (data->data_in + data->input_frames * state->channels > data->data_out)  in src_process()
117 		{	/*-printf ("\n\ndata_in: %p    data_out: %p\n",  in src_process()
118 				(void*) (data->data_in + data->input_frames * psrc->channels), (void*) data->data_out) ;-*/  in src_process()
122 	else if (data->data_out + data->output_frames * state->channels > data->data_in)  in src_process()
123 …{	/*-printf ("\n\ndata_in : %p   ouput frames: %ld    data_out: %p\n", (void*) data->data_in, data…  in src_process()
125 		printf ("data_out: %p (%p)    data_in: %p\n", (void*) data->data_out,  in src_process()
126 			(void*) (data->data_out + data->input_frames * psrc->channels), (void*) data->data_in) ;-*/  in src_process()
131 	data->input_frames_used = 0 ;  in src_process()
132 	data->output_frames_gen = 0 ;  in src_process()
135 	if (state->last_ratio < (1.0 / SRC_MAX_RATIO))  in src_process()
136 		state->last_ratio = data->src_ratio ;  in src_process()
139 	if (fabs (state->last_ratio - data->src_ratio) < 1e-15)  in src_process()
140 		error = state->vt->const_process (state, data) ;  in src_process()
142 		error = state->vt->vari_process (state, data) ;  in src_process()
162 	if (state->mode != SRC_MODE_CALLBACK)
163 	{	state->error = SRC_ERR_BAD_MODE ;
167 	if (state->callback_func == NULL)
168 	{	state->error = SRC_ERR_NULL_CALLBACK ;
176 	{	state->error = SRC_ERR_BAD_SRC_RATIO ;
185 	src_data.data_in = state->saved_data ;
186 	src_data.input_frames = state->saved_frames ;
198 			src_data.input_frames = state->callback_func (state->user_callback_data, &ptr) ;
210 		state->mode = SRC_MODE_PROCESS ;
212 		state->mode = SRC_MODE_CALLBACK ;
217 		src_data.data_in += src_data.input_frames_used * state->channels ;
218 		src_data.input_frames -= src_data.input_frames_used ;
220 		src_data.data_out += src_data.output_frames_gen * state->channels ;
221 		src_data.output_frames -= src_data.output_frames_gen ;
229 	state->saved_data = src_data.data_in ;
230 	state->saved_frames = src_data.input_frames ;
233 	{	state->error = (SRC_ERROR) error ;
252 	state->last_ratio = new_ratio ;
261 		return -SRC_ERR_BAD_STATE ;
263 	return state->channels ;
272 	state->vt->reset (state) ;
274 	state->last_position = 0.0 ;
275 	state->last_ratio = 0.0 ;
277 	state->saved_data = NULL ;
278 	state->saved_frames = 0 ;
280 	state->error = SRC_ERR_NO_ERROR ;
323 {	return PACKAGE "-" VERSION " (c) 2002-2008 Erik de Castro Lopo" ;
342 		return state->error ;
359 				return "SRC_DATA->data_out or SRC_DATA->data_in is NULL." ;
414 src_simple (SRC_DATA *src_data, int converter, int channels)
418 	if ((src_state = src_new (converter, channels, &error)) == NULL)
421 	src_data->end_of_input = 1 ; /* Only one buffer worth of input. */
448 		else if (scaled_value <= -32768.f)
449 			out [i] = -32768 ;
478 		if (scaled_value <= (-8.0 * 0x10000000))
479 		{	out [i] = -1 - 0x7fffffff ;
494 psrc_set_converter (int converter_type, int channels, int *error)  in psrc_set_converter()  argument
502 		state = sinc_state_new (converter_type, channels, &temp_error) ;  in psrc_set_converter()
507 		state = sinc_state_new (converter_type, channels, &temp_error) ;  in psrc_set_converter()
512 		state = sinc_state_new (converter_type, channels, &temp_error) ;  in psrc_set_converter()
516 		state = zoh_state_new (channels, &temp_error) ;  in psrc_set_converter()
519 		state = linear_state_new (channels, &temp_error) ;  in psrc_set_converter()