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authorMax Kellermann <max@duempel.org>2009-01-07 18:06:22 +0100
committerMax Kellermann <max@duempel.org>2009-01-07 18:06:22 +0100
commit3fd1fa31ca26c0cbf0f74a1f11dbaeaa176ab6ff (patch)
treec753a6d701a53ba73050b9f19acae1150e9ca870 /src/pcm_utils.c
parent9d0579996c66273b87baae5ef1bde433f5c1ff71 (diff)
downloadmpd-3fd1fa31ca26c0cbf0f74a1f11dbaeaa176ab6ff.tar.gz
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pcm_utils: moved code to pcm_mix.c
Moved the software mixing code (used by crossfading) to a separate library.
Diffstat (limited to 'src/pcm_utils.c')
-rw-r--r--src/pcm_utils.c89
1 files changed, 0 insertions, 89 deletions
diff --git a/src/pcm_utils.c b/src/pcm_utils.c
index d619c9dd7..fd2786e3a 100644
--- a/src/pcm_utils.c
+++ b/src/pcm_utils.c
@@ -18,8 +18,6 @@
#include "pcm_utils.h"
#include "pcm_channels.h"
-#include "pcm_prng.h"
-#include "pcm_volume.h"
#include "conf.h"
#include "audio_format.h"
@@ -31,93 +29,6 @@
#undef G_LOG_DOMAIN
#define G_LOG_DOMAIN "pcm"
-static void
-pcm_add_8(int8_t *buffer1, const int8_t *buffer2,
- unsigned num_samples, int volume1, int volume2)
-{
- while (num_samples > 0) {
- int32_t sample1 = *buffer1;
- int32_t sample2 = *buffer2++;
-
- sample1 = ((sample1 * volume1 + sample2 * volume2) +
- pcm_dither() + PCM_VOLUME_1 / 2) / PCM_VOLUME_1;
-
- *buffer1++ = pcm_range(sample1, 8);
- --num_samples;
- }
-}
-
-static void
-pcm_add_16(int16_t *buffer1, const int16_t *buffer2,
- unsigned num_samples, int volume1, int volume2)
-{
- while (num_samples > 0) {
- int32_t sample1 = *buffer1;
- int32_t sample2 = *buffer2++;
-
- sample1 = ((sample1 * volume1 + sample2 * volume2) +
- pcm_dither() + PCM_VOLUME_1 / 2) / PCM_VOLUME_1;
-
- *buffer1++ = pcm_range(sample1, 16);
- --num_samples;
- }
-}
-
-static void
-pcm_add_24(int32_t *buffer1, const int32_t *buffer2,
- unsigned num_samples, unsigned volume1, unsigned volume2)
-{
- while (num_samples > 0) {
- int64_t sample1 = *buffer1;
- int64_t sample2 = *buffer2++;
-
- sample1 = ((sample1 * volume1 + sample2 * volume2) +
- pcm_dither() + PCM_VOLUME_1 / 2) / PCM_VOLUME_1;
-
- *buffer1++ = pcm_range(sample1, 24);
- --num_samples;
- }
-}
-
-static void pcm_add(char *buffer1, const char *buffer2, size_t size,
- int vol1, int vol2,
- const struct audio_format *format)
-{
- switch (format->bits) {
- case 8:
- pcm_add_8((int8_t *)buffer1, (const int8_t *)buffer2,
- size, vol1, vol2);
- break;
-
- case 16:
- pcm_add_16((int16_t *)buffer1, (const int16_t *)buffer2,
- size / 2, vol1, vol2);
- break;
-
- case 24:
- pcm_add_24((int32_t*)buffer1,
- (const int32_t*)buffer2,
- size / 4, vol1, vol2);
- break;
-
- default:
- g_error("%u bits not supported by pcm_add!\n", format->bits);
- }
-}
-
-void pcm_mix(char *buffer1, const char *buffer2, size_t size,
- const struct audio_format *format, float portion1)
-{
- int vol1;
- float s = sin(M_PI_2 * portion1);
- s *= s;
-
- vol1 = s * PCM_VOLUME_1 + 0.5;
- vol1 = vol1 > PCM_VOLUME_1 ? PCM_VOLUME_1 : (vol1 < 0 ? 0 : vol1);
-
- pcm_add(buffer1, buffer2, size, vol1, PCM_VOLUME_1 - vol1, format);
-}
-
void pcm_convert_init(struct pcm_convert_state *state)
{
memset(state, 0, sizeof(*state));