pcm_convert: add method _reset()

Resets the libsamplerate state.  Not being used yet.

6 files changed, 39 insertions, 0 deletions

diff --git a/src/pcm_convert.c b/src/pcm_convert.c
index daf1cd23..a3b3bb44 100644
--- a/src/pcm_convert.c
+++ b/src/pcm_convert.c
@@ -57,6 +57,12 @@ void pcm_convert_deinit(struct pcm_convert_state *state)
 	pcm_buffer_deinit(&state->byteswap_buffer);
 }
 
+void
+pcm_convert_reset(struct pcm_convert_state *state)
+{
+	pcm_resample_reset(&state->resample);
+}
+
 static const void *
 pcm_convert_channels(struct pcm_buffer *buffer, enum sample_format format,
 		     uint8_t dest_channels,
diff --git a/src/pcm_convert.h b/src/pcm_convert.h
index 6dbd7541..41a9f938 100644
--- a/src/pcm_convert.h
+++ b/src/pcm_convert.h
@@ -67,6 +67,13 @@ void pcm_convert_init(struct pcm_convert_state *state);
 void pcm_convert_deinit(struct pcm_convert_state *state);
 
 /**
+ * Reset the pcm_convert_state object.  Use this at the boundary
+ * between two distinct songs and each time the format changes.
+ */
+void
+pcm_convert_reset(struct pcm_convert_state *state);
+
+/**
  * Converts PCM data between two audio formats.
  *
  * @param state an initialized pcm_convert_state object
diff --git a/src/pcm_resample.c b/src/pcm_resample.c
index 892d1c63..4bc057a7 100644
--- a/src/pcm_resample.c
+++ b/src/pcm_resample.c
@@ -76,6 +76,16 @@ void pcm_resample_deinit(struct pcm_resample_state *state)
 		pcm_resample_fallback_deinit(state);
 }
 
+void
+pcm_resample_reset(struct pcm_resample_state *state)
+{
+#ifdef HAVE_LIBSAMPLERATE
+	pcm_resample_lsr_reset(state);
+#else
+	(void)state;
+#endif
+}
+
 const float *
 pcm_resample_float(struct pcm_resample_state *state,
 		   unsigned channels,
diff --git a/src/pcm_resample.h b/src/pcm_resample.h
index 24fa1d04..a49a2414 100644
--- a/src/pcm_resample.h
+++ b/src/pcm_resample.h
@@ -69,6 +69,12 @@ void pcm_resample_init(struct pcm_resample_state *state);
 void pcm_resample_deinit(struct pcm_resample_state *state);
 
 /**
+ * @see pcm_convert_reset()
+ */
+void
+pcm_resample_reset(struct pcm_resample_state *state);
+
+/**
  * Resamples 32 bit float data.
  *
  * @param state an initialized pcm_resample_state object
diff --git a/src/pcm_resample_internal.h b/src/pcm_resample_internal.h
index 0b0a0500..a0e108d4 100644
--- a/src/pcm_resample_internal.h
+++ b/src/pcm_resample_internal.h
@@ -41,6 +41,9 @@ pcm_resample_lsr_init(struct pcm_resample_state *state);
 void
 pcm_resample_lsr_deinit(struct pcm_resample_state *state);
 
+void
+pcm_resample_lsr_reset(struct pcm_resample_state *state);
+
 const float *
 pcm_resample_lsr_float(struct pcm_resample_state *state,
 		       unsigned channels,
diff --git a/src/pcm_resample_libsamplerate.c b/src/pcm_resample_libsamplerate.c
index c1b1760a..f957e515 100644
--- a/src/pcm_resample_libsamplerate.c
+++ b/src/pcm_resample_libsamplerate.c
@@ -104,6 +104,13 @@ pcm_resample_lsr_deinit(struct pcm_resample_state *state)
 	pcm_buffer_deinit(&state->buffer);
 }
 
+void
+pcm_resample_lsr_reset(struct pcm_resample_state *state)
+{
+	if (state->state != NULL)
+		src_reset(state->state);
+}
+
 static bool
 pcm_resample_set(struct pcm_resample_state *state,
 		 unsigned channels, unsigned src_rate, unsigned dest_rate,