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-rw-r--r--src/pcm_format.c75
1 files changed, 75 insertions, 0 deletions
diff --git a/src/pcm_format.c b/src/pcm_format.c
index d22dfb896..bb731b2b6 100644
--- a/src/pcm_format.c
+++ b/src/pcm_format.c
@@ -46,6 +46,18 @@ pcm_convert_32_to_16(struct pcm_dither *dither,
pcm_dither_32_to_16(dither, out, in, in_end);
}
+static void
+pcm_convert_float_to_16(int16_t *out, const float *in, const float *in_end)
+{
+ const unsigned OUT_BITS = 16;
+ const float factor = 1 << (OUT_BITS - 1);
+
+ while (in < in_end) {
+ int sample = *in++ * factor;
+ *out++ = pcm_clamp_16(sample);
+ }
+}
+
static int16_t *
pcm_allocate_8_to_16(struct pcm_buffer *buffer,
const int8_t *src, size_t src_size, size_t *dest_size_r)
@@ -112,6 +124,20 @@ pcm_allocate_32_to_16(struct pcm_buffer *buffer, struct pcm_dither *dither,
return dest;
}
+static int16_t *
+pcm_allocate_float_to_16(struct pcm_buffer *buffer,
+ const float *src, size_t src_size,
+ size_t *dest_size_r)
+{
+ int16_t *dest;
+ *dest_size_r = src_size / 2;
+ assert(*dest_size_r == src_size / sizeof(*src) * sizeof(*dest));
+ dest = pcm_buffer_get(buffer, *dest_size_r);
+ pcm_convert_float_to_16(dest, src,
+ pcm_end_pointer(src, src_size));
+ return dest;
+}
+
const int16_t *
pcm_convert_to_16(struct pcm_buffer *buffer, struct pcm_dither *dither,
enum sample_format src_format, const void *src,
@@ -142,6 +168,10 @@ pcm_convert_to_16(struct pcm_buffer *buffer, struct pcm_dither *dither,
case SAMPLE_FORMAT_S32:
return pcm_allocate_32_to_16(buffer, dither, src, src_size,
dest_size_r);
+
+ case SAMPLE_FORMAT_FLOAT:
+ return pcm_allocate_float_to_16(buffer, src, src_size,
+ dest_size_r);
}
return NULL;
@@ -170,6 +200,18 @@ pcm_convert_32_to_24(int32_t *restrict out,
*out++ = *in++ >> 8;
}
+static void
+pcm_convert_float_to_24(int32_t *out, const float *in, const float *in_end)
+{
+ const unsigned OUT_BITS = 24;
+ const float factor = 1 << (OUT_BITS - 1);
+
+ while (in < in_end) {
+ int sample = *in++ * factor;
+ *out++ = pcm_clamp_24(sample);
+ }
+}
+
static int32_t *
pcm_allocate_8_to_24(struct pcm_buffer *buffer,
const int8_t *src, size_t src_size, size_t *dest_size_r)
@@ -203,6 +245,17 @@ pcm_allocate_32_to_24(struct pcm_buffer *buffer,
return dest;
}
+static int32_t *
+pcm_allocate_float_to_24(struct pcm_buffer *buffer,
+ const float *src, size_t src_size,
+ size_t *dest_size_r)
+{
+ *dest_size_r = src_size;
+ int32_t *dest = pcm_buffer_get(buffer, *dest_size_r);
+ pcm_convert_float_to_24(dest, src, pcm_end_pointer(src, src_size));
+ return dest;
+}
+
const int32_t *
pcm_convert_to_24(struct pcm_buffer *buffer,
enum sample_format src_format, const void *src,
@@ -233,6 +286,10 @@ pcm_convert_to_24(struct pcm_buffer *buffer,
case SAMPLE_FORMAT_S32:
return pcm_allocate_32_to_24(buffer, src, src_size,
dest_size_r);
+
+ case SAMPLE_FORMAT_FLOAT:
+ return pcm_allocate_float_to_24(buffer, src, src_size,
+ dest_size_r);
}
return NULL;
@@ -309,6 +366,20 @@ pcm_allocate_24p32_to_32(struct pcm_buffer *buffer,
return dest;
}
+static int32_t *
+pcm_allocate_float_to_32(struct pcm_buffer *buffer,
+ const float *src, size_t src_size,
+ size_t *dest_size_r)
+{
+ /* convert to S24_P32 first */
+ int32_t *dest = pcm_allocate_float_to_24(buffer, src, src_size,
+ dest_size_r);
+
+ /* convert to 32 bit in-place */
+ pcm_convert_24_to_32(dest, dest, pcm_end_pointer(dest, *dest_size_r));
+ return dest;
+}
+
const int32_t *
pcm_convert_to_32(struct pcm_buffer *buffer,
enum sample_format src_format, const void *src,
@@ -339,6 +410,10 @@ pcm_convert_to_32(struct pcm_buffer *buffer,
case SAMPLE_FORMAT_S32:
*dest_size_r = src_size;
return src;
+
+ case SAMPLE_FORMAT_FLOAT:
+ return pcm_allocate_float_to_32(buffer, src, src_size,
+ dest_size_r);
}
return NULL;