Changeset 950110ee in mainline for uspace/srv/audio/hound/audio_format.c

Timestamp:

2012-07-17T07:33:43Z (11 years ago)

Author:

Jan Vesely <jano.vesely@…>

Branches:

lfn, master, serial

Children:

ea6c838

Parents:

389ef25

Message:

hound: convert format while mixing.

Still no resampling.

File:

• uspace/srv/audio/hound/audio_format.c (modified) (4 diffs)

uspace/srv/audio/hound/audio_format.c

@@ -90 +90 @@
 int audio_format_mix(void *dst, const void *src, size_t size, const audio_format_t *f)
 {
-        if (!dst || !src || !f)
+        return audio_format_convert_and_mix(dst, size, src, size, f, f);
+}
+int audio_format_convert_and_mix(void *dst, size_t dst_size, const void *src,
+    size_t src_size, const audio_format_t *sf, const audio_format_t *df)
+{
+        if (!dst || !src || !sf || !df)
                 return EINVAL;
-        const size_t sample_size = pcm_sample_format_size(f->sample_format);
-        if ((size % sample_size) != 0)
+        const size_t src_frame_size = audio_format_frame_size(sf);
+        if ((src_size % src_frame_size) != 0)
+                return EINVAL;
+
+        const size_t dst_frame_size = audio_format_frame_size(df);
+        if ((src_size % dst_frame_size) != 0)
                 return EINVAL;
 
@@ -101 +110 @@
 #define LOOP_ADD(type, endian, low, high) \
 do { \
-        const unsigned frame_size = audio_format_frame_size(f); \
-        const unsigned frame_count = size / frame_size; \
+        const unsigned frame_count = dst_size / dst_frame_size; \
         for (size_t i = 0; i < frame_count; ++i) { \
-                for (unsigned j = 0; j < f->channels; ++j) { \
+                for (unsigned j = 0; j < df->channels; ++j) { \
                         const float a = \
-                            get_normalized_sample(dst, size, i, j, f);\
+                            get_normalized_sample(dst, src_size, i, j, df);\
                         const float b = \
-                            get_normalized_sample(src, size, i, j, f);\
+                            get_normalized_sample(src, dst_size, i, j, sf);\
                         float c = (a + b); \
                         if (c < -1.0) c = -1.0; \
@@ -115 +123 @@
                         c *= ((float)(type)high - (float)(type)low) / 2; \
                         c += (float)(type)low; \
-                        if (c > (float)(type)high) { \
-                                printf("SCALE HIGH failed\n"); \
-                        } \
-                        if (c < (float)(type)low) { \
-                                printf("SCALE LOW failed\n"); \
-                        } \
                         type *dst_buf = dst; \
-                        const unsigned pos = i * f->channels  + j; \
-                        if (pos < (size / sizeof(type))) \
+                        const unsigned pos = i * df->channels  + j; \
+                        if (pos < (dst_size / sizeof(type))) \
                                 dst_buf[pos] = to((type)c, type, endian); \
                 } \
@@ -129 +131 @@
 } while (0)
 
-        switch (f->sample_format) {
+        switch (df->sample_format) {
         case PCM_SAMPLE_UINT8:
                 LOOP_ADD(uint8_t, le, UINT8_MIN, UINT8_MAX); break;