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1b600a2d54
There was no code that included files from other directories using the #include "..." style before. Signed-off-by: Alexander E. Patrakov <patrakov@gmail.com>
102 lines
2.7 KiB
C
102 lines
2.7 KiB
C
/***
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This file is part of PulseAudio.
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Copyright 2004-2006 Lennart Poettering
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PulseAudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 2.1 of the License,
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or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with PulseAudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <samplerate.h>
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#include <pulsecore/resampler.h>
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static unsigned libsamplerate_resample(pa_resampler *r, const pa_memchunk *input, unsigned in_n_frames, pa_memchunk *output, unsigned *out_n_frames) {
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SRC_DATA data;
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SRC_STATE *state;
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pa_assert(r);
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pa_assert(input);
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pa_assert(output);
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pa_assert(out_n_frames);
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state = r->impl.data;
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memset(&data, 0, sizeof(data));
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data.data_in = pa_memblock_acquire_chunk(input);
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data.input_frames = (long int) in_n_frames;
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data.data_out = pa_memblock_acquire_chunk(output);
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data.output_frames = (long int) *out_n_frames;
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data.src_ratio = (double) r->o_ss.rate / r->i_ss.rate;
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data.end_of_input = 0;
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pa_assert_se(src_process(state, &data) == 0);
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pa_memblock_release(input->memblock);
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pa_memblock_release(output->memblock);
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*out_n_frames = (unsigned) data.output_frames_gen;
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return in_n_frames - data.input_frames_used;
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}
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static void libsamplerate_update_rates(pa_resampler *r) {
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SRC_STATE *state;
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pa_assert(r);
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state = r->impl.data;
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pa_assert_se(src_set_ratio(state, (double) r->o_ss.rate / r->i_ss.rate) == 0);
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}
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static void libsamplerate_reset(pa_resampler *r) {
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SRC_STATE *state;
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pa_assert(r);
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state = r->impl.data;
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pa_assert_se(src_reset(state) == 0);
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}
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static void libsamplerate_free(pa_resampler *r) {
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SRC_STATE *state;
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pa_assert(r);
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state = r->impl.data;
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if (state)
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src_delete(state);
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}
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int pa_resampler_libsamplerate_init(pa_resampler *r) {
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int err;
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SRC_STATE *state;
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pa_assert(r);
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if (!(state = src_new(r->method, r->work_channels, &err)))
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return -1;
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r->impl.free = libsamplerate_free;
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r->impl.update_rates = libsamplerate_update_rates;
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r->impl.resample = libsamplerate_resample;
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r->impl.reset = libsamplerate_reset;
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r->impl.data = state;
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return 0;
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}
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