From a9d2dc614496a8eee4269f4032457eb8a7fb6102 Mon Sep 17 00:00:00 2001 From: Max Kellermann Date: Mon, 29 Jul 2013 23:18:55 +0200 Subject: pcm_resample: convert to C++ --- src/pcm/pcm_resample_libsamplerate.c | 312 ----------------------------------- 1 file changed, 312 deletions(-) delete mode 100644 src/pcm/pcm_resample_libsamplerate.c (limited to 'src/pcm/pcm_resample_libsamplerate.c') diff --git a/src/pcm/pcm_resample_libsamplerate.c b/src/pcm/pcm_resample_libsamplerate.c deleted file mode 100644 index f957e5155..000000000 --- a/src/pcm/pcm_resample_libsamplerate.c +++ /dev/null @@ -1,312 +0,0 @@ -/* - * Copyright (C) 2003-2011 The Music Player Daemon Project - * http://www.musicpd.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., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - */ - -#include "config.h" -#include "pcm_resample_internal.h" -#include "conf.h" - -#include - -#include -#include -#include - -#undef G_LOG_DOMAIN -#define G_LOG_DOMAIN "pcm" - -static int lsr_converter = SRC_SINC_FASTEST; - -static inline GQuark -libsamplerate_quark(void) -{ - return g_quark_from_static_string("libsamplerate"); -} - -static bool -lsr_parse_converter(const char *s) -{ - assert(s != NULL); - - if (*s == 0) - return true; - - char *endptr; - long l = strtol(s, &endptr, 10); - if (*endptr == 0 && src_get_name(l) != NULL) { - lsr_converter = l; - return true; - } - - size_t length = strlen(s); - for (int i = 0;; ++i) { - const char *name = src_get_name(i); - if (name == NULL) - break; - - if (g_ascii_strncasecmp(s, name, length) == 0) { - lsr_converter = i; - return true; - } - } - - return false; -} - -bool -pcm_resample_lsr_global_init(const char *converter, GError **error_r) -{ - if (!lsr_parse_converter(converter)) { - g_set_error(error_r, libsamplerate_quark(), 0, - "unknown samplerate converter '%s'", converter); - return false; - } - - g_debug("libsamplerate converter '%s'", - src_get_name(lsr_converter)); - - return true; -} - -void -pcm_resample_lsr_init(struct pcm_resample_state *state) -{ - memset(state, 0, sizeof(*state)); - - pcm_buffer_init(&state->in); - pcm_buffer_init(&state->out); - pcm_buffer_init(&state->buffer); -} - -void -pcm_resample_lsr_deinit(struct pcm_resample_state *state) -{ - if (state->state != NULL) - state->state = src_delete(state->state); - - pcm_buffer_deinit(&state->in); - pcm_buffer_deinit(&state->out); - pcm_buffer_deinit(&state->buffer); -} - -void -pcm_resample_lsr_reset(struct pcm_resample_state *state) -{ - if (state->state != NULL) - src_reset(state->state); -} - -static bool -pcm_resample_set(struct pcm_resample_state *state, - unsigned channels, unsigned src_rate, unsigned dest_rate, - GError **error_r) -{ - int error; - SRC_DATA *data = &state->data; - - /* (re)set the state/ratio if the in or out format changed */ - if (channels == state->prev.channels && - src_rate == state->prev.src_rate && - dest_rate == state->prev.dest_rate) - return true; - - state->error = 0; - state->prev.channels = channels; - state->prev.src_rate = src_rate; - state->prev.dest_rate = dest_rate; - - if (state->state) - state->state = src_delete(state->state); - - state->state = src_new(lsr_converter, channels, &error); - if (!state->state) { - g_set_error(error_r, libsamplerate_quark(), state->error, - "libsamplerate initialization has failed: %s", - src_strerror(error)); - return false; - } - - data->src_ratio = (double)dest_rate / (double)src_rate; - g_debug("setting samplerate conversion ratio to %.2lf", - data->src_ratio); - src_set_ratio(state->state, data->src_ratio); - - return true; -} - -static bool -lsr_process(struct pcm_resample_state *state, GError **error_r) -{ - if (state->error == 0) - state->error = src_process(state->state, &state->data); - if (state->error) { - g_set_error(error_r, libsamplerate_quark(), state->error, - "libsamplerate has failed: %s", - src_strerror(state->error)); - return false; - } - - return true; -} - -static float * -deconst_float_buffer(const float *in) -{ - union { - const float *in; - float *out; - } u = { .in = in }; - return u.out; -} - -const float * -pcm_resample_lsr_float(struct pcm_resample_state *state, - unsigned channels, - unsigned src_rate, - const float *src_buffer, size_t src_size, - unsigned dest_rate, size_t *dest_size_r, - GError **error_r) -{ - assert((src_size % (sizeof(*src_buffer) * channels)) == 0); - - if (!pcm_resample_set(state, channels, src_rate, dest_rate, error_r)) - return NULL; - - SRC_DATA *data = &state->data; - data->input_frames = src_size / sizeof(*src_buffer) / channels; - data->data_in = deconst_float_buffer(src_buffer); - - data->output_frames = (src_size * dest_rate + src_rate - 1) / src_rate; - size_t data_out_size = data->output_frames * sizeof(float) * channels; - data->data_out = pcm_buffer_get(&state->out, data_out_size); - - if (!lsr_process(state, error_r)) - return NULL; - - *dest_size_r = data->output_frames_gen * - sizeof(*data->data_out) * channels; - return data->data_out; -} - -const int16_t * -pcm_resample_lsr_16(struct pcm_resample_state *state, - unsigned channels, - unsigned src_rate, - const int16_t *src_buffer, size_t src_size, - unsigned dest_rate, size_t *dest_size_r, - GError **error_r) -{ - bool success; - SRC_DATA *data = &state->data; - size_t data_in_size; - size_t data_out_size; - int16_t *dest_buffer; - - assert((src_size % (sizeof(*src_buffer) * channels)) == 0); - - success = pcm_resample_set(state, channels, src_rate, dest_rate, - error_r); - if (!success) - return NULL; - - data->input_frames = src_size / sizeof(*src_buffer) / channels; - data_in_size = data->input_frames * sizeof(float) * channels; - data->data_in = pcm_buffer_get(&state->in, data_in_size); - - data->output_frames = (src_size * dest_rate + src_rate - 1) / src_rate; - data_out_size = data->output_frames * sizeof(float) * channels; - data->data_out = pcm_buffer_get(&state->out, data_out_size); - - src_short_to_float_array(src_buffer, data->data_in, - data->input_frames * channels); - - if (!lsr_process(state, error_r)) - return NULL; - - *dest_size_r = data->output_frames_gen * - sizeof(*dest_buffer) * channels; - dest_buffer = pcm_buffer_get(&state->buffer, *dest_size_r); - src_float_to_short_array(data->data_out, dest_buffer, - data->output_frames_gen * channels); - - return dest_buffer; -} - -#ifdef HAVE_LIBSAMPLERATE_NOINT - -/* libsamplerate introduced these functions in v0.1.3 */ - -static void -src_int_to_float_array(const int *in, float *out, int len) -{ - while (len-- > 0) - *out++ = *in++ / (float)(1 << (24 - 1)); -} - -static void -src_float_to_int_array (const float *in, int *out, int len) -{ - while (len-- > 0) - *out++ = *in++ * (float)(1 << (24 - 1)); -} - -#endif - -const int32_t * -pcm_resample_lsr_32(struct pcm_resample_state *state, - unsigned channels, - unsigned src_rate, - const int32_t *src_buffer, size_t src_size, - unsigned dest_rate, size_t *dest_size_r, - GError **error_r) -{ - bool success; - SRC_DATA *data = &state->data; - size_t data_in_size; - size_t data_out_size; - int32_t *dest_buffer; - - assert((src_size % (sizeof(*src_buffer) * channels)) == 0); - - success = pcm_resample_set(state, channels, src_rate, dest_rate, - error_r); - if (!success) - return NULL; - - data->input_frames = src_size / sizeof(*src_buffer) / channels; - data_in_size = data->input_frames * sizeof(float) * channels; - data->data_in = pcm_buffer_get(&state->in, data_in_size); - - data->output_frames = (src_size * dest_rate + src_rate - 1) / src_rate; - data_out_size = data->output_frames * sizeof(float) * channels; - data->data_out = pcm_buffer_get(&state->out, data_out_size); - - src_int_to_float_array(src_buffer, data->data_in, - data->input_frames * channels); - - if (!lsr_process(state, error_r)) - return NULL; - - *dest_size_r = data->output_frames_gen * - sizeof(*dest_buffer) * channels; - dest_buffer = pcm_buffer_get(&state->buffer, *dest_size_r); - src_float_to_int_array(data->data_out, dest_buffer, - data->output_frames_gen * channels); - - return dest_buffer; -} -- cgit v1.2.3