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-rw-r--r--src/pcm_volume.c190
1 files changed, 0 insertions, 190 deletions
diff --git a/src/pcm_volume.c b/src/pcm_volume.c
deleted file mode 100644
index 49c86026f..000000000
--- a/src/pcm_volume.c
+++ /dev/null
@@ -1,190 +0,0 @@
-/*
- * 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 "pcm_volume.h"
-#include "pcm_utils.h"
-#include "audio_format.h"
-
-#include <glib.h>
-
-#include <stdint.h>
-#include <string.h>
-
-#undef G_LOG_DOMAIN
-#define G_LOG_DOMAIN "pcm_volume"
-
-static void
-pcm_volume_change_8(int8_t *buffer, const int8_t *end, int volume)
-{
- while (buffer < end) {
- int32_t sample = *buffer;
-
- sample = (sample * volume + pcm_volume_dither() +
- PCM_VOLUME_1 / 2)
- / PCM_VOLUME_1;
-
- *buffer++ = pcm_range(sample, 8);
- }
-}
-
-static void
-pcm_volume_change_16(int16_t *buffer, const int16_t *end, int volume)
-{
- while (buffer < end) {
- int32_t sample = *buffer;
-
- sample = (sample * volume + pcm_volume_dither() +
- PCM_VOLUME_1 / 2)
- / PCM_VOLUME_1;
-
- *buffer++ = pcm_range(sample, 16);
- }
-}
-
-#ifdef __i386__
-/**
- * Optimized volume function for i386. Use the EDX:EAX 2*32 bit
- * multiplication result instead of emulating 64 bit multiplication.
- */
-static inline int32_t
-pcm_volume_sample_24(int32_t sample, int32_t volume, G_GNUC_UNUSED int32_t dither)
-{
- int32_t result;
-
- asm(/* edx:eax = sample * volume */
- "imul %2\n"
-
- /* "add %3, %1\n" dithering disabled for now, because we
- have no overflow check - is dithering really important
- here? */
-
- /* eax = edx:eax / PCM_VOLUME_1 */
- "sal $22, %%edx\n"
- "shr $10, %1\n"
- "or %%edx, %1\n"
-
- : "=a"(result)
- : "0"(sample), "r"(volume) /* , "r"(dither) */
- : "edx"
- );
-
- return result;
-}
-#endif
-
-static void
-pcm_volume_change_24(int32_t *buffer, const int32_t *end, int volume)
-{
- while (buffer < end) {
-#ifdef __i386__
- /* assembly version for i386 */
- int32_t sample = *buffer;
-
- sample = pcm_volume_sample_24(sample, volume,
- pcm_volume_dither());
-#else
- /* portable version */
- int64_t sample = *buffer;
-
- sample = (sample * volume + pcm_volume_dither() +
- PCM_VOLUME_1 / 2)
- / PCM_VOLUME_1;
-#endif
- *buffer++ = pcm_range(sample, 24);
- }
-}
-
-static void
-pcm_volume_change_32(int32_t *buffer, const int32_t *end, int volume)
-{
- while (buffer < end) {
-#ifdef __i386__
- /* assembly version for i386 */
- int32_t sample = *buffer;
-
- *buffer++ = pcm_volume_sample_24(sample, volume, 0);
-#else
- /* portable version */
- int64_t sample = *buffer;
-
- sample = (sample * volume + pcm_volume_dither() +
- PCM_VOLUME_1 / 2)
- / PCM_VOLUME_1;
- *buffer++ = pcm_range_64(sample, 32);
-#endif
- }
-}
-
-static void
-pcm_volume_change_float(float *buffer, const float *end, float volume)
-{
- while (buffer < end) {
- float sample = *buffer;
- sample *= volume;
- *buffer++ = sample;
- }
-}
-
-bool
-pcm_volume(void *buffer, size_t length,
- enum sample_format format,
- int volume)
-{
- if (volume == PCM_VOLUME_1)
- return true;
-
- if (volume <= 0) {
- memset(buffer, 0, length);
- return true;
- }
-
- const void *end = pcm_end_pointer(buffer, length);
- switch (format) {
- case SAMPLE_FORMAT_UNDEFINED:
- case SAMPLE_FORMAT_DSD:
- /* not implemented */
- return false;
-
- case SAMPLE_FORMAT_S8:
- pcm_volume_change_8(buffer, end, volume);
- return true;
-
- case SAMPLE_FORMAT_S16:
- pcm_volume_change_16(buffer, end, volume);
- return true;
-
- case SAMPLE_FORMAT_S24_P32:
- pcm_volume_change_24(buffer, end, volume);
- return true;
-
- case SAMPLE_FORMAT_S32:
- pcm_volume_change_32(buffer, end, volume);
- return true;
-
- case SAMPLE_FORMAT_FLOAT:
- pcm_volume_change_float(buffer, end,
- pcm_volume_to_float(volume));
- return true;
- }
-
- /* unreachable */
- assert(false);
- return false;
-}