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Diffstat (limited to '')
-rw-r--r-- | src/pcm/PcmResampleLibsamplerate.cxx | 290 |
1 files changed, 0 insertions, 290 deletions
diff --git a/src/pcm/PcmResampleLibsamplerate.cxx b/src/pcm/PcmResampleLibsamplerate.cxx deleted file mode 100644 index e61ff2edf..000000000 --- a/src/pcm/PcmResampleLibsamplerate.cxx +++ /dev/null @@ -1,290 +0,0 @@ -/* - * Copyright (C) 2003-2013 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 "PcmResampleInternal.hxx" -#include "PcmUtils.hxx" -#include "util/ASCII.hxx" -#include "util/Error.hxx" -#include "util/Domain.hxx" -#include "Log.hxx" - -#include <assert.h> -#include <stdlib.h> -#include <string.h> - -static int lsr_converter = SRC_SINC_FASTEST; - -static constexpr Domain libsamplerate_domain("libsamplerate"); - -static bool -lsr_parse_converter(const char *s) -{ - assert(s != nullptr); - - if (*s == 0) - return true; - - char *endptr; - long l = strtol(s, &endptr, 10); - if (*endptr == 0 && src_get_name(l) != nullptr) { - lsr_converter = l; - return true; - } - - size_t length = strlen(s); - for (int i = 0;; ++i) { - const char *name = src_get_name(i); - if (name == nullptr) - break; - - if (StringEqualsCaseASCII(s, name, length)) { - lsr_converter = i; - return true; - } - } - - return false; -} - -bool -pcm_resample_lsr_global_init(const char *converter, Error &error) -{ - if (!lsr_parse_converter(converter)) { - error.Format(libsamplerate_domain, - "unknown samplerate converter '%s'", converter); - return false; - } - - FormatDebug(libsamplerate_domain, - "libsamplerate converter '%s'", - src_get_name(lsr_converter)); - - return true; -} - -void -pcm_resample_lsr_init(PcmResampler *state) -{ - state->state = nullptr; - memset(&state->data, 0, sizeof(state->data)); - memset(&state->prev, 0, sizeof(state->prev)); - state->error = 0; -} - -void -pcm_resample_lsr_deinit(PcmResampler *state) -{ - if (state->state != nullptr) - state->state = src_delete(state->state); -} - -void -pcm_resample_lsr_reset(PcmResampler *state) -{ - if (state->state != nullptr) - src_reset(state->state); -} - -static bool -pcm_resample_set(PcmResampler *state, - unsigned channels, unsigned src_rate, unsigned dest_rate, - Error &error_r) -{ - /* (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); - - int error; - state->state = src_new(lsr_converter, channels, &error); - if (!state->state) { - error_r.Format(libsamplerate_domain, error, - "libsamplerate initialization has failed: %s", - src_strerror(error)); - return false; - } - - SRC_DATA *data = &state->data; - data->src_ratio = (double)dest_rate / (double)src_rate; - FormatDebug(libsamplerate_domain, - "setting samplerate conversion ratio to %.2lf", - data->src_ratio); - src_set_ratio(state->state, data->src_ratio); - - return true; -} - -static bool -lsr_process(PcmResampler *state, Error &error) -{ - if (state->error == 0) - state->error = src_process(state->state, &state->data); - if (state->error) { - error.Format(libsamplerate_domain, state->error, - "libsamplerate has failed: %s", - src_strerror(state->error)); - return false; - } - - return true; -} - -const float * -pcm_resample_lsr_float(PcmResampler *state, - unsigned channels, - unsigned src_rate, - const float *src_buffer, size_t src_size, - unsigned dest_rate, size_t *dest_size_r, - Error &error) -{ - SRC_DATA *data = &state->data; - - assert((src_size % (sizeof(*src_buffer) * channels)) == 0); - - if (!pcm_resample_set(state, channels, src_rate, dest_rate, error)) - return nullptr; - - data->input_frames = src_size / sizeof(*src_buffer) / channels; - data->data_in = const_cast<float *>(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 = (float *)state->out.Get(data_out_size); - - if (!lsr_process(state, error)) - return nullptr; - - *dest_size_r = data->output_frames_gen * - sizeof(*data->data_out) * channels; - return data->data_out; -} - -const int16_t * -pcm_resample_lsr_16(PcmResampler *state, - unsigned channels, - unsigned src_rate, - const int16_t *src_buffer, size_t src_size, - unsigned dest_rate, size_t *dest_size_r, - Error &error) -{ - SRC_DATA *data = &state->data; - - assert((src_size % (sizeof(*src_buffer) * channels)) == 0); - - if (!pcm_resample_set(state, channels, src_rate, dest_rate, - error)) - return nullptr; - - data->input_frames = src_size / sizeof(*src_buffer) / channels; - size_t data_in_size = data->input_frames * sizeof(float) * channels; - data->data_in = (float *)state->in.Get(data_in_size); - - 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 = (float *)state->out.Get(data_out_size); - - src_short_to_float_array(src_buffer, data->data_in, - data->input_frames * channels); - - if (!lsr_process(state, error)) - return nullptr; - - int16_t *dest_buffer; - *dest_size_r = data->output_frames_gen * - sizeof(*dest_buffer) * channels; - dest_buffer = (int16_t *)state->buffer.Get(*dest_size_r); - src_float_to_short_array(data->data_out, dest_buffer, - data->output_frames_gen * channels); - - return dest_buffer; -} - -const int32_t * -pcm_resample_lsr_32(PcmResampler *state, - unsigned channels, - unsigned src_rate, - const int32_t *src_buffer, size_t src_size, - unsigned dest_rate, size_t *dest_size_r, - Error &error) -{ - SRC_DATA *data = &state->data; - - assert((src_size % (sizeof(*src_buffer) * channels)) == 0); - - if (!pcm_resample_set(state, channels, src_rate, dest_rate, - error)) - return nullptr; - - data->input_frames = src_size / sizeof(*src_buffer) / channels; - size_t data_in_size = data->input_frames * sizeof(float) * channels; - data->data_in = (float *)state->in.Get(data_in_size); - - 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 = (float *)state->out.Get(data_out_size); - - src_int_to_float_array(src_buffer, data->data_in, - data->input_frames * channels); - - if (!lsr_process(state, error)) - return nullptr; - - int32_t *dest_buffer; - *dest_size_r = data->output_frames_gen * - sizeof(*dest_buffer) * channels; - dest_buffer = (int32_t *)state->buffer.Get(*dest_size_r); - src_float_to_int_array(data->data_out, dest_buffer, - data->output_frames_gen * channels); - - return dest_buffer; -} - -const int32_t * -pcm_resample_lsr_24(PcmResampler *state, - unsigned channels, - unsigned src_rate, - const int32_t *src_buffer, size_t src_size, - unsigned dest_rate, size_t *dest_size_r, - Error &error) -{ - const auto result = pcm_resample_lsr_32(state, channels, - src_rate, src_buffer, src_size, - dest_rate, dest_size_r, - error); - if (result != nullptr) - /* src_float_to_int_array() clamps for 32 bit - integers; now make sure everything's fine for 24 - bit */ - /* TODO: eliminate the 32 bit clamp to reduce overhead */ - PcmClampN<int32_t, int32_t, 24>(const_cast<int32_t *>(result), - result, - *dest_size_r / sizeof(*result)); - - return result; -} |