Add API functions to limit minimum bitrate

Quite a lot of decoders have trouble streaming or seeking in a
file with frames that only consist of constant subframes because
of the large difference between the largest and smallest subframe.

To remedy this, this commit makes it possible to disable the use
of constant subframes for the last subframe in case all others are
constant with a new API function. This means the minimum bitrate
for a FLAC file encoded with this function used is raised to
1bit/sample (i.e. 48kbit/s for 48kHz material). This commit also
adds tests to the test suite

1 files changed, 12 insertions, 0 deletions

diff --git a/src/libFLAC++/stream_encoder.cpp b/src/libFLAC++/stream_encoder.cpp
index 8230f609..e4ae2d6a 100644
--- a/src/libFLAC++/stream_encoder.cpp
+++ b/src/libFLAC++/stream_encoder.cpp
@@ -211,6 +211,12 @@ namespace FLAC {
 			return ok;
 		}
 
+		bool Stream::set_limit_min_bitrate(bool value)
+		{
+			FLAC__ASSERT(is_valid());
+			return static_cast<bool>(::FLAC__stream_encoder_set_limit_min_bitrate(encoder_, value));
+		}
+
 		Stream::State Stream::get_state() const
 		{
 			FLAC__ASSERT(is_valid());
@@ -331,6 +337,12 @@ namespace FLAC {
 			return ::FLAC__stream_encoder_get_total_samples_estimate(encoder_);
 		}
 
+		bool Stream::get_limit_min_bitrate() const
+		{
+			FLAC__ASSERT(is_valid());
+			return static_cast<bool>(::FLAC__stream_encoder_get_limit_min_bitrate(encoder_));
+		}
+
 		::FLAC__StreamEncoderInitStatus Stream::init()
 		{
 			FLAC__ASSERT(is_valid());