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-rw-r--r--src/PcmConvert.cxx326
1 files changed, 326 insertions, 0 deletions
diff --git a/src/PcmConvert.cxx b/src/PcmConvert.cxx
new file mode 100644
index 000000000..9618b9642
--- /dev/null
+++ b/src/PcmConvert.cxx
@@ -0,0 +1,326 @@
+/*
+ * 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 "PcmConvert.hxx"
+#include "PcmChannels.hxx"
+#include "PcmFormat.hxx"
+#include "pcm_pack.h"
+#include "audio_format.h"
+
+#include <assert.h>
+#include <string.h>
+#include <math.h>
+#include <glib.h>
+
+#undef G_LOG_DOMAIN
+#define G_LOG_DOMAIN "pcm"
+
+PcmConvert::PcmConvert()
+{
+ memset(this, 0, sizeof(*this));
+
+ pcm_dsd_init(&dsd);
+ pcm_resample_init(&resample);
+
+ pcm_buffer_init(&format_buffer);
+ pcm_buffer_init(&channels_buffer);
+}
+
+PcmConvert::~PcmConvert()
+{
+ pcm_dsd_deinit(&dsd);
+ pcm_resample_deinit(&resample);
+
+ pcm_buffer_deinit(&format_buffer);
+ pcm_buffer_deinit(&channels_buffer);
+}
+
+void
+PcmConvert::Reset()
+{
+ pcm_dsd_reset(&dsd);
+ pcm_resample_reset(&resample);
+}
+
+inline const int16_t *
+PcmConvert::Convert16(const audio_format *src_format,
+ const void *src_buffer, size_t src_size,
+ const audio_format *dest_format, size_t *dest_size_r,
+ GError **error_r)
+{
+ const int16_t *buf;
+ size_t len;
+
+ assert(dest_format->format == SAMPLE_FORMAT_S16);
+
+ buf = pcm_convert_to_16(&format_buffer, dither,
+ sample_format(src_format->format),
+ src_buffer, src_size,
+ &len);
+ if (buf == NULL) {
+ g_set_error(error_r, pcm_convert_quark(), 0,
+ "Conversion from %s to 16 bit is not implemented",
+ sample_format_to_string(sample_format(src_format->format)));
+ return NULL;
+ }
+
+ if (src_format->channels != dest_format->channels) {
+ buf = pcm_convert_channels_16(&channels_buffer,
+ dest_format->channels,
+ src_format->channels,
+ buf, len, &len);
+ if (buf == NULL) {
+ g_set_error(error_r, pcm_convert_quark(), 0,
+ "Conversion from %u to %u channels "
+ "is not implemented",
+ src_format->channels,
+ dest_format->channels);
+ return NULL;
+ }
+ }
+
+ if (src_format->sample_rate != dest_format->sample_rate) {
+ buf = pcm_resample_16(&resample,
+ dest_format->channels,
+ src_format->sample_rate, buf, len,
+ dest_format->sample_rate, &len,
+ error_r);
+ if (buf == NULL)
+ return NULL;
+ }
+
+ *dest_size_r = len;
+ return buf;
+}
+
+inline const int32_t *
+PcmConvert::Convert24(const audio_format *src_format,
+ const void *src_buffer, size_t src_size,
+ const audio_format *dest_format, size_t *dest_size_r,
+ GError **error_r)
+{
+ const int32_t *buf;
+ size_t len;
+
+ assert(dest_format->format == SAMPLE_FORMAT_S24_P32);
+
+ buf = pcm_convert_to_24(&format_buffer,
+ sample_format(src_format->format),
+ src_buffer, src_size, &len);
+ if (buf == NULL) {
+ g_set_error(error_r, pcm_convert_quark(), 0,
+ "Conversion from %s to 24 bit is not implemented",
+ sample_format_to_string(sample_format(src_format->format)));
+ return NULL;
+ }
+
+ if (src_format->channels != dest_format->channels) {
+ buf = pcm_convert_channels_24(&channels_buffer,
+ dest_format->channels,
+ src_format->channels,
+ buf, len, &len);
+ if (buf == NULL) {
+ g_set_error(error_r, pcm_convert_quark(), 0,
+ "Conversion from %u to %u channels "
+ "is not implemented",
+ src_format->channels,
+ dest_format->channels);
+ return NULL;
+ }
+ }
+
+ if (src_format->sample_rate != dest_format->sample_rate) {
+ buf = pcm_resample_24(&resample,
+ dest_format->channels,
+ src_format->sample_rate, buf, len,
+ dest_format->sample_rate, &len,
+ error_r);
+ if (buf == NULL)
+ return NULL;
+ }
+
+ *dest_size_r = len;
+ return buf;
+}
+
+inline const int32_t *
+PcmConvert::Convert32(const audio_format *src_format,
+ const void *src_buffer, size_t src_size,
+ const audio_format *dest_format, size_t *dest_size_r,
+ GError **error_r)
+{
+ const int32_t *buf;
+ size_t len;
+
+ assert(dest_format->format == SAMPLE_FORMAT_S32);
+
+ buf = pcm_convert_to_32(&format_buffer,
+ sample_format(src_format->format),
+ src_buffer, src_size, &len);
+ if (buf == NULL) {
+ g_set_error(error_r, pcm_convert_quark(), 0,
+ "Conversion from %s to 32 bit is not implemented",
+ sample_format_to_string(sample_format(src_format->format)));
+ return NULL;
+ }
+
+ if (src_format->channels != dest_format->channels) {
+ buf = pcm_convert_channels_32(&channels_buffer,
+ dest_format->channels,
+ src_format->channels,
+ buf, len, &len);
+ if (buf == NULL) {
+ g_set_error(error_r, pcm_convert_quark(), 0,
+ "Conversion from %u to %u channels "
+ "is not implemented",
+ src_format->channels,
+ dest_format->channels);
+ return NULL;
+ }
+ }
+
+ if (src_format->sample_rate != dest_format->sample_rate) {
+ buf = pcm_resample_32(&resample,
+ dest_format->channels,
+ src_format->sample_rate, buf, len,
+ dest_format->sample_rate, &len,
+ error_r);
+ if (buf == NULL)
+ return buf;
+ }
+
+ *dest_size_r = len;
+ return buf;
+}
+
+inline const float *
+PcmConvert::ConvertFloat(const audio_format *src_format,
+ const void *src_buffer, size_t src_size,
+ const audio_format *dest_format, size_t *dest_size_r,
+ GError **error_r)
+{
+ const float *buffer = (const float *)src_buffer;
+ size_t size = src_size;
+
+ assert(dest_format->format == SAMPLE_FORMAT_FLOAT);
+
+ /* convert to float now */
+
+ buffer = pcm_convert_to_float(&format_buffer,
+ sample_format(src_format->format),
+ buffer, size, &size);
+ if (buffer == NULL) {
+ g_set_error(error_r, pcm_convert_quark(), 0,
+ "Conversion from %s to float is not implemented",
+ sample_format_to_string(sample_format(src_format->format)));
+ return NULL;
+ }
+
+ /* convert channels */
+
+ if (src_format->channels != dest_format->channels) {
+ buffer = pcm_convert_channels_float(&channels_buffer,
+ dest_format->channels,
+ src_format->channels,
+ buffer, size, &size);
+ if (buffer == NULL) {
+ g_set_error(error_r, pcm_convert_quark(), 0,
+ "Conversion from %u to %u channels "
+ "is not implemented",
+ src_format->channels,
+ dest_format->channels);
+ return NULL;
+ }
+ }
+
+ /* resample with float, because this is the best format for
+ libsamplerate */
+
+ if (src_format->sample_rate != dest_format->sample_rate) {
+ buffer = pcm_resample_float(&resample,
+ dest_format->channels,
+ src_format->sample_rate,
+ buffer, size,
+ dest_format->sample_rate, &size,
+ error_r);
+ if (buffer == NULL)
+ return NULL;
+ }
+
+ *dest_size_r = size;
+ return buffer;
+}
+
+const void *
+PcmConvert::Convert(const audio_format *src_format,
+ const void *src, size_t src_size,
+ const audio_format *dest_format,
+ size_t *dest_size_r,
+ GError **error_r)
+{
+ struct audio_format float_format;
+ if (src_format->format == SAMPLE_FORMAT_DSD) {
+ size_t f_size;
+ const float *f = pcm_dsd_to_float(&dsd,
+ src_format->channels,
+ false, (const uint8_t *)src,
+ src_size, &f_size);
+ if (f == NULL) {
+ g_set_error_literal(error_r, pcm_convert_quark(), 0,
+ "DSD to PCM conversion failed");
+ return NULL;
+ }
+
+ float_format = *src_format;
+ float_format.format = SAMPLE_FORMAT_FLOAT;
+
+ src_format = &float_format;
+ src = f;
+ src_size = f_size;
+ }
+
+ switch (sample_format(dest_format->format)) {
+ case SAMPLE_FORMAT_S16:
+ return Convert16(src_format, src, src_size,
+ dest_format, dest_size_r,
+ error_r);
+
+ case SAMPLE_FORMAT_S24_P32:
+ return Convert24(src_format, src, src_size,
+ dest_format, dest_size_r,
+ error_r);
+
+ case SAMPLE_FORMAT_S32:
+ return Convert32(src_format, src, src_size,
+ dest_format, dest_size_r,
+ error_r);
+
+ case SAMPLE_FORMAT_FLOAT:
+ return ConvertFloat(src_format, src, src_size,
+ dest_format, dest_size_r,
+ error_r);
+
+ default:
+ g_set_error(error_r, pcm_convert_quark(), 0,
+ "PCM conversion to %s is not implemented",
+ sample_format_to_string(sample_format(dest_format->format)));
+ return NULL;
+ }
+}
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