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authorChase Geigle <geigle1@illinois.edu>2014-01-21 12:34:06 -0600
committerMax Kellermann <max@duempel.org>2014-01-21 20:35:26 +0100
commit716bdc36fd5427c8e24589a00d90d47d99c81cd6 (patch)
tree16f4aeb088c29ee3cc4350cbccefccceba3f26af /src/pcm/SoxrResampler.cxx
parent4f120f371474dbdc3e7ec4182d257dc9492d827b (diff)
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pcm/SoxrResampler: Add configurable quality levels
Diffstat (limited to 'src/pcm/SoxrResampler.cxx')
-rw-r--r--src/pcm/SoxrResampler.cxx69
1 files changed, 68 insertions, 1 deletions
diff --git a/src/pcm/SoxrResampler.cxx b/src/pcm/SoxrResampler.cxx
index 99277fac7..2508e816e 100644
--- a/src/pcm/SoxrResampler.cxx
+++ b/src/pcm/SoxrResampler.cxx
@@ -31,6 +31,72 @@
static constexpr Domain soxr_domain("soxr");
+static unsigned long soxr_quality_recipe = SOXR_HQ;
+
+static const char *
+soxr_quality_name(unsigned long recipe)
+{
+ switch (recipe) {
+ case SOXR_VHQ:
+ return "Very High Quality";
+ case SOXR_HQ:
+ return "High Quality";
+ case SOXR_MQ:
+ return "Medium Quality";
+ case SOXR_LQ:
+ return "Low Quality";
+ case SOXR_QQ:
+ return "Quick";
+ }
+
+ gcc_unreachable();
+}
+
+static bool
+soxr_parse_converter(const char *converter)
+{
+ assert(converter != nullptr);
+
+ assert(memcmp(converter, "soxr", 4) == 0);
+ if (converter[4] == '\0')
+ return true;
+ if (converter[4] != ' ')
+ return false;
+
+ // converter example is "soxr very high", we want the "very high" part
+ const char *quality = converter + 5;
+ if (strcmp(quality, "very high") == 0)
+ soxr_quality_recipe = SOXR_VHQ;
+ else if (strcmp(quality, "high") == 0)
+ soxr_quality_recipe = SOXR_HQ;
+ else if (strcmp(quality, "medium") == 0)
+ soxr_quality_recipe = SOXR_MQ;
+ else if (strcmp(quality, "low") == 0)
+ soxr_quality_recipe = SOXR_LQ;
+ else if (strcmp(quality, "quick") == 0)
+ soxr_quality_recipe = SOXR_QQ;
+ else
+ return false;
+
+ return true;
+}
+
+bool
+pcm_resample_soxr_global_init(const char *converter, Error &error)
+{
+ if (!soxr_parse_converter(converter)) {
+ error.Format(soxr_domain,
+ "unknown samplerate converter '%s'", converter);
+ return false;
+ }
+
+ FormatDebug(soxr_domain,
+ "soxr converter '%s'",
+ soxr_quality_name(soxr_quality_recipe));
+
+ return true;
+}
+
AudioFormat
SoxrPcmResampler::Open(AudioFormat &af, unsigned new_sample_rate,
Error &error)
@@ -39,9 +105,10 @@ SoxrPcmResampler::Open(AudioFormat &af, unsigned new_sample_rate,
assert(audio_valid_sample_rate(new_sample_rate));
soxr_error_t e;
+ soxr_quality_spec_t quality = soxr_quality_spec(soxr_quality_recipe, 0);
soxr = soxr_create(af.sample_rate, new_sample_rate,
af.channels, &e,
- nullptr, nullptr, nullptr);
+ nullptr, &quality, nullptr);
if (soxr == nullptr) {
error.Format(soxr_domain,
"soxr initialization has failed: %s", e);