2009-01-07 18:53:36 +01:00
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/*
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* Copyright (C) 2003-2009 The Music Player Daemon Project
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* http://www.musicpd.org
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2004-02-24 18:06:14 +01:00
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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2009-01-07 18:53:36 +01:00
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#include "pcm_convert.h"
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2008-10-23 20:03:14 +02:00
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#include "pcm_channels.h"
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2009-01-07 18:19:09 +01:00
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#include "pcm_format.h"
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2008-09-07 19:19:55 +02:00
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#include "audio_format.h"
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2008-10-08 10:49:29 +02:00
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#include <assert.h>
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#include <string.h>
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#include <math.h>
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2008-12-02 02:22:43 +01:00
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#include <glib.h>
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2004-02-24 00:41:20 +01:00
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2008-12-29 17:28:49 +01:00
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#undef G_LOG_DOMAIN
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#define G_LOG_DOMAIN "pcm"
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2008-10-21 22:53:16 +02:00
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void pcm_convert_init(struct pcm_convert_state *state)
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{
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memset(state, 0, sizeof(*state));
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2008-10-23 16:58:07 +02:00
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2008-10-23 20:00:51 +02:00
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pcm_resample_init(&state->resample);
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2008-10-23 16:58:07 +02:00
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pcm_dither_24_init(&state->dither);
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2009-01-07 23:56:34 +01:00
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pcm_buffer_init(&state->format_buffer);
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2009-01-07 23:56:35 +01:00
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pcm_buffer_init(&state->channels_buffer);
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2008-10-21 22:53:16 +02:00
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}
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2009-01-07 22:20:30 +01:00
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void pcm_convert_deinit(struct pcm_convert_state *state)
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{
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pcm_resample_deinit(&state->resample);
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2009-01-07 23:56:34 +01:00
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pcm_buffer_deinit(&state->format_buffer);
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2009-01-07 23:56:35 +01:00
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pcm_buffer_deinit(&state->channels_buffer);
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2009-01-07 22:20:30 +01:00
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}
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2008-10-23 20:11:24 +02:00
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static size_t
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pcm_convert_16(const struct audio_format *src_format,
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const void *src_buffer, size_t src_size,
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const struct audio_format *dest_format,
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int16_t *dest_buffer,
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struct pcm_convert_state *state)
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2007-05-23 01:11:36 +02:00
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{
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2008-10-12 11:28:37 +02:00
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const int16_t *buf;
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2008-10-23 20:11:24 +02:00
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size_t len;
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size_t dest_size = pcm_convert_size(src_format, src_size, dest_format);
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2007-05-23 01:11:36 +02:00
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2008-10-23 20:11:24 +02:00
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assert(dest_format->bits == 16);
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2007-05-23 01:11:36 +02:00
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2009-01-07 23:56:34 +01:00
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buf = pcm_convert_to_16(&state->format_buffer, &state->dither,
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src_format->bits, src_buffer, src_size,
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&len);
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2007-05-23 01:11:36 +02:00
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if (!buf)
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2009-01-03 14:52:13 +01:00
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g_error("pcm_convert_to_16() failed");
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2007-05-23 01:11:36 +02:00
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2008-10-23 20:11:24 +02:00
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if (src_format->channels != dest_format->channels) {
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2009-01-07 23:56:35 +01:00
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buf = pcm_convert_channels_16(&state->channels_buffer,
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dest_format->channels,
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2008-10-23 20:11:24 +02:00
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src_format->channels,
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2008-10-23 20:03:14 +02:00
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buf, len, &len);
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2007-05-23 01:11:36 +02:00
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if (!buf)
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2009-01-03 14:52:13 +01:00
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g_error("pcm_convert_channels_16() failed");
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2007-05-23 01:11:36 +02:00
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}
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2008-10-23 20:11:24 +02:00
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if (src_format->sample_rate == dest_format->sample_rate) {
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2008-10-21 22:53:13 +02:00
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assert(dest_size >= len);
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2008-10-23 20:11:24 +02:00
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memcpy(dest_buffer, buf, len);
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2007-05-23 01:11:36 +02:00
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} else {
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2008-10-23 20:11:24 +02:00
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len = pcm_resample_16(dest_format->channels,
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src_format->sample_rate, buf, len,
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dest_format->sample_rate,
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dest_buffer, dest_size,
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&state->resample);
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2007-05-23 01:11:36 +02:00
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}
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2007-05-26 18:39:55 +02:00
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return len;
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2004-05-10 16:06:23 +02:00
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}
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2008-10-23 20:11:37 +02:00
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static size_t
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pcm_convert_24(const struct audio_format *src_format,
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const void *src_buffer, size_t src_size,
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const struct audio_format *dest_format,
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int32_t *dest_buffer,
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struct pcm_convert_state *state)
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{
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const int32_t *buf;
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size_t len;
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size_t dest_size = pcm_convert_size(src_format, src_size, dest_format);
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assert(dest_format->bits == 24);
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2009-01-07 23:56:34 +01:00
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buf = pcm_convert_to_24(&state->format_buffer, src_format->bits,
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2008-10-23 20:11:37 +02:00
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src_buffer, src_size, &len);
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if (!buf)
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2009-01-03 14:52:13 +01:00
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g_error("pcm_convert_to_24() failed");
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2008-10-23 20:11:37 +02:00
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if (src_format->channels != dest_format->channels) {
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2009-01-07 23:56:35 +01:00
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buf = pcm_convert_channels_24(&state->channels_buffer,
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dest_format->channels,
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2008-10-23 20:11:37 +02:00
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src_format->channels,
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buf, len, &len);
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if (!buf)
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2009-01-03 14:52:13 +01:00
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g_error("pcm_convert_channels_24() failed");
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2008-10-23 20:11:37 +02:00
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}
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if (src_format->sample_rate == dest_format->sample_rate) {
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assert(dest_size >= len);
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memcpy(dest_buffer, buf, len);
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} else {
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len = pcm_resample_24(dest_format->channels,
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src_format->sample_rate, buf, len,
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dest_format->sample_rate,
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(int32_t*)dest_buffer, dest_size,
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&state->resample);
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}
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return len;
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}
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2008-10-23 20:11:24 +02:00
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size_t pcm_convert(const struct audio_format *inFormat,
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2009-01-07 19:00:02 +01:00
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const void *src, size_t src_size,
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2008-10-23 20:11:24 +02:00
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const struct audio_format *outFormat,
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2009-01-07 19:00:02 +01:00
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void *dest,
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2008-10-23 20:11:24 +02:00
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struct pcm_convert_state *convState)
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{
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switch (outFormat->bits) {
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case 16:
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return pcm_convert_16(inFormat, src, src_size,
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2009-01-07 19:00:02 +01:00
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outFormat, (int16_t*)dest,
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2008-10-23 20:11:24 +02:00
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convState);
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2008-10-23 20:11:37 +02:00
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case 24:
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return pcm_convert_24(inFormat, src, src_size,
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2009-01-07 19:00:02 +01:00
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outFormat, (int32_t*)dest,
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2008-10-23 20:11:37 +02:00
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convState);
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2008-10-23 20:11:24 +02:00
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default:
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2008-12-29 17:28:49 +01:00
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g_error("cannot convert to %u bit\n", outFormat->bits);
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2008-10-23 20:11:24 +02:00
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}
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}
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2008-10-21 22:53:13 +02:00
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size_t pcm_convert_size(const struct audio_format *inFormat, size_t src_size,
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const struct audio_format *outFormat)
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2004-05-10 16:06:23 +02:00
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{
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2008-10-10 14:40:54 +02:00
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const double ratio = (double)outFormat->sample_rate /
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(double)inFormat->sample_rate;
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2008-10-21 22:53:13 +02:00
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size_t dest_size = src_size;
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2004-05-10 17:21:40 +02:00
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2008-10-23 16:48:49 +02:00
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/* no partial frames allowed */
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assert((src_size % audio_format_frame_size(inFormat)) == 0);
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2008-10-23 20:11:28 +02:00
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dest_size /= audio_format_frame_size(inFormat);
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2008-12-08 08:58:27 +01:00
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dest_size = ceil((double)dest_size * ratio);
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2008-10-23 20:11:28 +02:00
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dest_size *= audio_format_frame_size(outFormat);
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2004-05-10 16:06:23 +02:00
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2008-10-21 22:53:13 +02:00
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return dest_size;
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2004-05-10 16:06:23 +02:00
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}
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