demux: use no overlapping packets for lossless audio

Worthless optimization, but at least it justifies that the
--audio-backward-overlap option has an "auto" choice. Tested with PCM
and FLAC.

2 files changed, 9 insertions, 0 deletions

diff --git a/common/av_common.c b/common/av_common.c
index 3ea1ceb872..01428ff2f4 100644
--- a/common/av_common.c
+++ b/common/av_common.c
@@ -292,6 +292,13 @@ const char *mp_codec_from_av_codec_id(int codec_id)
     return name;
 }
 
+bool mp_codec_is_lossless(const char *codec)
+{
+    const AVCodecDescriptor *desc =
+        avcodec_descriptor_get(mp_codec_to_av_codec_id(codec));
+    return desc && (desc->props & AV_CODEC_PROP_LOSSLESS);
+}
+
 // kv is in the format as by OPT_KEYVALUELIST(): kv[0]=key0, kv[1]=val0, ...
 // Copy them to the dict.
 void mp_set_avdict(AVDictionary **dict, char **kv)
diff --git a/common/av_common.h b/common/av_common.h
index 4037afa0ad..1b3e468884 100644
--- a/common/av_common.h
+++ b/common/av_common.h
@@ -19,6 +19,7 @@
 #define MP_AVCOMMON_H
 
 #include <inttypes.h>
+#include <stdbool.h>
 
 #include <libavutil/avutil.h>
 #include <libavutil/rational.h>
@@ -44,6 +45,7 @@ void mp_add_lavc_encoders(struct mp_decoder_list *list);
 char **mp_get_lavf_demuxers(void);
 int mp_codec_to_av_codec_id(const char *codec);
 const char *mp_codec_from_av_codec_id(int codec_id);
+bool mp_codec_is_lossless(const char *codec);
 void mp_set_avdict(struct AVDictionary **dict, char **kv);
 void mp_avdict_print_unset(struct mp_log *log, int msgl, struct AVDictionary *d);
 int mp_set_avopts(struct mp_log *log, void *avobj, char **kv);