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-rw-r--r--premix.c294
1 files changed, 294 insertions, 0 deletions
diff --git a/premix.c b/premix.c
new file mode 100644
index 00000000..89cbef11
--- /dev/null
+++ b/premix.c
@@ -0,0 +1,294 @@
+/*
+ DeaDBeeF - ultimate music player for GNU/Linux systems with X11
+ Copyright (C) 2009-2010 Alexey Yakovenko <waker@users.sourceforge.net>
+
+ 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 <assert.h>
+#include <string.h>
+#include <stdlib.h>
+#include "deadbeef.h"
+#include "premix.h"
+
+#define trace(...) { fprintf(stderr, __VA_ARGS__); }
+//#define trace(fmt,...)
+
+
+static inline void
+pcm_write_samples_8_to_8 (const ddb_waveformat_t * restrict inputfmt, const char * restrict input, const ddb_waveformat_t * restrict outputfmt, char * restrict output, int nsamples, int * restrict channelmap, int outputsamplesize) {
+ for (int s = 0; s < nsamples; s++) {
+ for (int c = 0; c < inputfmt->channels; c++) {
+ if (channelmap[c] != -1) {
+ *(output + (outputfmt->bps >> 3) * channelmap[c]) = *input;
+ }
+ input++;
+ }
+ output += outputsamplesize;
+ }
+}
+
+static inline void
+pcm_write_samples_8_to_16 (const ddb_waveformat_t * restrict inputfmt, const char * restrict input, const ddb_waveformat_t * restrict outputfmt, char * restrict output, int nsamples, int * restrict channelmap, int outputsamplesize) {
+ for (int s = 0; s < nsamples; s++) {
+ for (int c = 0; c < inputfmt->channels; c++) {
+ if (channelmap[c] != -1) {
+ *((int16_t*)(output + (outputfmt->bps >> 3) * channelmap[c])) = (int16_t)(*input) << 8;
+ }
+ input++;
+ }
+ output += outputsamplesize;
+ }
+}
+
+static inline void
+pcm_write_samples_8_to_24 (const ddb_waveformat_t * restrict inputfmt, const char * restrict input, const ddb_waveformat_t * restrict outputfmt, char * restrict output, int nsamples, int * restrict channelmap, int outputsamplesize) {
+ for (int s = 0; s < nsamples; s++) {
+ for (int c = 0; c < inputfmt->channels; c++) {
+ if (channelmap[c] != -1) {
+ char *out = output + (outputfmt->bps >> 3) * channelmap[c];
+ out[0] = 0;
+ out[1] = 0;
+ out[2] = input[0];
+ }
+ input += 1;
+ }
+ output += outputsamplesize;
+ }
+}
+
+static inline void
+pcm_write_samples_8_to_32 (const ddb_waveformat_t * restrict inputfmt, const char * restrict input, const ddb_waveformat_t * restrict outputfmt, char * restrict output, int nsamples, int * restrict channelmap, int outputsamplesize) {
+ for (int s = 0; s < nsamples; s++) {
+ for (int c = 0; c < inputfmt->channels; c++) {
+ if (channelmap[c] != -1) {
+ char *out = output + (outputfmt->bps >> 3) * channelmap[c];
+ out[0] = 0;
+ out[1] = 0;
+ out[2] = 0;
+ out[3] = input[0];
+ }
+ input += 1;
+ }
+ output += outputsamplesize;
+ }
+}
+
+static inline void
+pcm_write_samples_8_to_float (const ddb_waveformat_t * restrict inputfmt, const char * restrict input, const ddb_waveformat_t * restrict outputfmt, char * restrict output, int nsamples, int * restrict channelmap, int outputsamplesize) {
+ for (int s = 0; s < nsamples; s++) {
+ for (int c = 0; c < inputfmt->channels; c++) {
+ if (channelmap[c] != -1) {
+ float sample = (*input) / (float)0x7f;
+ *((float *)(output + (outputfmt->bps >> 3) * channelmap[c])) = sample;
+ }
+ input++;
+ }
+ output += outputsamplesize;
+ }
+}
+
+static inline void
+pcm_write_samples_16_to_16 (const ddb_waveformat_t * restrict inputfmt, const char * restrict input, const ddb_waveformat_t * restrict outputfmt, char * restrict output, int nsamples, int * restrict channelmap, int outputsamplesize) {
+ for (int s = 0; s < nsamples; s++) {
+ for (int c = 0; c < inputfmt->channels; c++) {
+ if (channelmap[c] != -1) {
+ *((int16_t*)(output + (outputfmt->bps >> 3) * channelmap[c])) = *((int16_t*)input);
+ }
+ input += 2;
+ }
+ output += outputsamplesize;
+ }
+}
+
+static inline void
+pcm_write_samples_16_to_8 (const ddb_waveformat_t * restrict inputfmt, const char * restrict input, const ddb_waveformat_t * restrict outputfmt, char * restrict output, int nsamples, int * restrict channelmap, int outputsamplesize) {
+ for (int s = 0; s < nsamples; s++) {
+ for (int c = 0; c < inputfmt->channels; c++) {
+ if (channelmap[c] != -1) {
+ *((int8_t*)(output + (outputfmt->bps >> 3) * channelmap[c])) = *((int16_t*)input) >> 8;
+ }
+ input += 2;
+ }
+ output += outputsamplesize;
+ }
+}
+
+static inline void
+pcm_write_samples_16_to_24 (const ddb_waveformat_t * restrict inputfmt, const char * restrict input, const ddb_waveformat_t * restrict outputfmt, char * restrict output, int nsamples, int * restrict channelmap, int outputsamplesize) {
+ for (int s = 0; s < nsamples; s++) {
+ for (int c = 0; c < inputfmt->channels; c++) {
+ if (channelmap[c] != -1) {
+ char *out = output + (outputfmt->bps >> 3) * channelmap[c];
+ out[0] = 0;
+ out[1] = input[0];
+ out[2] = input[1];
+ }
+ input += 2;
+ }
+ output += outputsamplesize;
+ }
+}
+
+static inline void
+pcm_write_samples_16_to_32 (const ddb_waveformat_t * restrict inputfmt, const char * restrict input, const ddb_waveformat_t * restrict outputfmt, char * restrict output, int nsamples, int * restrict channelmap, int outputsamplesize) {
+ for (int s = 0; s < nsamples; s++) {
+ for (int c = 0; c < inputfmt->channels; c++) {
+ if (channelmap[c] != -1) {
+ char *out = output + (outputfmt->bps >> 3) * channelmap[c];
+ out[0] = 0;
+ out[1] = 0;
+ out[2] = input[0];
+ out[3] = input[1];
+ }
+ input += 2;
+ }
+ output += outputsamplesize;
+ }
+}
+
+static inline void
+pcm_write_samples_16_to_float (const ddb_waveformat_t * restrict inputfmt, const char * restrict input, const ddb_waveformat_t * restrict outputfmt, char * restrict output, int nsamples, int * restrict channelmap, int outputsamplesize) {
+ for (int s = 0; s < nsamples; s++) {
+ for (int c = 0; c < inputfmt->channels; c++) {
+ if (channelmap[c] != -1) {
+ float sample = (*((int16_t*)input)) / (float)0x7fff;
+ *((float *)(output + (outputfmt->bps >> 3) * channelmap[c])) = sample;
+ }
+ input += 2;
+ }
+ output += outputsamplesize;
+ }
+}
+
+static inline void
+pcm_write_samples_32_to_32 (const ddb_waveformat_t * restrict inputfmt, const char * restrict input, const ddb_waveformat_t * restrict outputfmt, char * restrict output, int nsamples, int * restrict channelmap, int outputsamplesize) {
+ for (int s = 0; s < nsamples; s++) {
+ for (int c = 0; c < inputfmt->channels; c++) {
+ if (channelmap[c] != -1) {
+ *((int32_t*)(output + (outputfmt->bps >> 3) * channelmap[c])) = *((int32_t*)input);
+ }
+ input += 4;
+ }
+ output += outputsamplesize;
+ }
+}
+
+static inline void
+pcm_write_samples_24_to_24 (const ddb_waveformat_t * restrict inputfmt, const char * restrict input, const ddb_waveformat_t * restrict outputfmt, char * restrict output, int nsamples, int * restrict channelmap, int outputsamplesize) {
+ for (int s = 0; s < nsamples; s++) {
+ for (int c = 0; c < inputfmt->channels; c++) {
+ if (channelmap[c] != -1) {
+ char *out = output + (outputfmt->bps >> 3) * channelmap[c];
+ out[0] = input[0];
+ out[1] = input[1];
+ out[2] = input[2];
+ }
+ input += 3;
+ }
+ output += outputsamplesize;
+ }
+}
+
+int
+pcm_convert (const ddb_waveformat_t * restrict inputfmt, const char * restrict input, const ddb_waveformat_t * restrict outputfmt, char * restrict output, int inputsize) {
+ // calculate output size
+ int inputsamplesize = (inputfmt->bps >> 3) * inputfmt->channels;
+ int outputsamplesize = (outputfmt->bps >> 3) * outputfmt->channels;
+ int nsamples = inputsize / inputsamplesize;
+
+ uint32_t outchannels = 0;
+
+ if (output) {
+ // build channelmap
+ int channelmap[32] = {-1};
+ uint32_t inputbitmask = 1;
+ for (int i = 0; i < inputfmt->channels; i++) {
+ // find next input channel
+ while (inputbitmask < 0x80000000 && !(inputfmt->channelmask & inputbitmask)) {
+ inputbitmask <<= 1;
+ }
+ if (!(inputfmt->channelmask & inputbitmask)) {
+ trace ("pcm_convert: channelmask doesn't correspond inputfmt (channels=%d, channelmask=%X)!\n", inputfmt->channels, inputfmt->channelmask);
+ break;
+ }
+ if (outputfmt->channelmask & inputbitmask) {
+ int o = 0;
+ uint32_t outputbitmask = 1;
+ while (outputbitmask < 0x80000000 && (outputfmt->channelmask & outputbitmask) != inputbitmask) {
+ outputbitmask <<= 1;
+ o++;
+ }
+ if (!(inputfmt->channelmask & outputbitmask)) {
+ // no corresponding output channel -- ignore
+ continue;
+ }
+ outchannels |= outputbitmask;
+ channelmap[i] = o; // input channel i going to output channel o
+ //trace ("channelmap[%d]=%d\n", i, o);
+ }
+ inputbitmask <<= 1;
+ }
+
+ if (outchannels != outputfmt->channelmask) {
+ // some of the channels are not used
+ memset (output, 0, nsamples * outputsamplesize);
+ }
+
+ // FIXME: access through function pointer table
+ //trace ("converting from %d to %d\n", inputfmt->bps, outputfmt->bps);
+ if (inputfmt->bps == 8 && outputfmt->bps == 8) {
+ pcm_write_samples_8_to_8 (inputfmt, input, outputfmt, output, nsamples, channelmap, outputsamplesize);
+ }
+ else if (inputfmt->bps == 8 && outputfmt->bps == 16) {
+ pcm_write_samples_8_to_16 (inputfmt, input, outputfmt, output, nsamples, channelmap, outputsamplesize);
+ }
+ else if (inputfmt->bps == 8 && outputfmt->bps == 24) {
+ pcm_write_samples_8_to_24 (inputfmt, input, outputfmt, output, nsamples, channelmap, outputsamplesize);
+ }
+ else if (inputfmt->bps == 8 && outputfmt->bps == 32 && !outputfmt->is_float) {
+ pcm_write_samples_8_to_32 (inputfmt, input, outputfmt, output, nsamples, channelmap, outputsamplesize);
+ }
+ else if (inputfmt->bps == 8 && outputfmt->bps == 32 && outputfmt->is_float) {
+ pcm_write_samples_8_to_float (inputfmt, input, outputfmt, output, nsamples, channelmap, outputsamplesize);
+ }
+ else if (inputfmt->bps == 16 && outputfmt->bps == 16) {
+ pcm_write_samples_16_to_16 (inputfmt, input, outputfmt, output, nsamples, channelmap, outputsamplesize);
+ }
+ else if (inputfmt->bps == 16 && outputfmt->bps == 8) {
+ pcm_write_samples_16_to_8 (inputfmt, input, outputfmt, output, nsamples, channelmap, outputsamplesize);
+ }
+ else if (inputfmt->bps == 16 && outputfmt->bps == 24) {
+ pcm_write_samples_16_to_24 (inputfmt, input, outputfmt, output, nsamples, channelmap, outputsamplesize);
+ }
+ else if (inputfmt->bps == 16 && outputfmt->bps == 32 && !outputfmt->is_float) {
+ pcm_write_samples_16_to_32 (inputfmt, input, outputfmt, output, nsamples, channelmap, outputsamplesize);
+ }
+ else if (inputfmt->bps == 16 && outputfmt->bps == 32 && outputfmt->is_float) {
+ pcm_write_samples_16_to_float (inputfmt, input, outputfmt, output, nsamples, channelmap, outputsamplesize);
+ }
+ else if (inputfmt->bps == 24 && outputfmt->bps == 24) {
+ pcm_write_samples_24_to_24 (inputfmt, input, outputfmt, output, nsamples, channelmap, outputsamplesize);
+ }
+ else if (inputfmt->bps == 32 && outputfmt->bps == 32) {
+ pcm_write_samples_32_to_32 (inputfmt, input, outputfmt, output, nsamples, channelmap, outputsamplesize);
+ }
+ else {
+ trace ("no converter from %d to %d\n", inputfmt->bps, outputfmt->bps);
+ }
+ }
+ return nsamples * outputsamplesize;
+}
+
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