player: add audio drop/duplicate mode

Not very robust in the moment.

2 files changed, 10 insertions, 0 deletions

diff --git a/audio/audio_buffer.c b/audio/audio_buffer.c
index 2bd546a532..c0f1341afe 100644
--- a/audio/audio_buffer.c
+++ b/audio/audio_buffer.c
@@ -119,6 +119,15 @@ void mp_audio_buffer_prepend_silence(struct mp_audio_buffer *ab, int samples)
     mp_audio_fill_silence(ab->buffer, 0, samples);
 }
 
+void mp_audio_buffer_duplicate(struct mp_audio_buffer *ab, int samples)
+{
+    assert(samples >= 0 && samples <= ab->buffer->samples);
+    int oldlen = ab->buffer->samples;
+    ab->buffer->samples += samples;
+    mp_audio_realloc_min(ab->buffer, ab->buffer->samples);
+    mp_audio_copy(ab->buffer, oldlen, ab->buffer, oldlen - samples, samples);
+}
+
 // Get the start of the current readable buffer.
 void mp_audio_buffer_peek(struct mp_audio_buffer *ab, struct mp_audio *out_mpa)
 {
diff --git a/audio/audio_buffer.h b/audio/audio_buffer.h
index 8cd0df30d0..f517542ef5 100644
--- a/audio/audio_buffer.h
+++ b/audio/audio_buffer.h
@@ -35,6 +35,7 @@ void mp_audio_buffer_get_write_buffer(struct mp_audio_buffer *ab, int minsamples
 void mp_audio_buffer_finish_write(struct mp_audio_buffer *ab, int samples);
 void mp_audio_buffer_append(struct mp_audio_buffer *ab, struct mp_audio *mpa);
 void mp_audio_buffer_prepend_silence(struct mp_audio_buffer *ab, int samples);
+void mp_audio_buffer_duplicate(struct mp_audio_buffer *ab, int samples);
 void mp_audio_buffer_peek(struct mp_audio_buffer *ab, struct mp_audio *out_mpa);
 void mp_audio_buffer_skip(struct mp_audio_buffer *ab, int samples);
 void mp_audio_buffer_clear(struct mp_audio_buffer *ab);