lavc: introduce av_get_pcm_codec.

doc/APIchanges

@@ -13,6 +13,9 @@ libavutil:   2011-04-18
 
 API changes, most recent first:
 
+2012-02-21 - xxxxxxx - lavc 54.4.100
+  Add av_get_pcm_codec() function.
+
 2012-02-16 - xxxxxxx - libswr 0.7.100
   Add swr_set_matrix() function.
 

libavcodec/avcodec.h

@@ -4055,6 +4055,14 @@ void avcodec_default_free_buffers(AVCodecContext *s);
  */
 int av_get_bits_per_sample(enum CodecID codec_id);
 
+/**
+ * Return the PCM codec associated with a sample format.
+ * @param be  endianness, 0 for little, 1 for big,
+ *            -1 (or anything else) for native
+ * @return  CODEC_ID_PCM_* or CODEC_ID_NONE
+ */
+enum CodecID av_get_pcm_codec(enum AVSampleFormat fmt, int be);
+
 /* frame parsing */
 typedef struct AVCodecParserContext {
     void *priv_data;

libavcodec/utils.c

@@ -1902,6 +1902,27 @@ int av_get_bits_per_sample(enum CodecID codec_id){
     }
 }
 
+enum CodecID av_get_pcm_codec(enum AVSampleFormat fmt, int be)
+{
+    static const enum CodecID map[AV_SAMPLE_FMT_NB][2] = {
+        [AV_SAMPLE_FMT_U8  ] = { CODEC_ID_PCM_U8,    CODEC_ID_PCM_U8    },
+        [AV_SAMPLE_FMT_S16 ] = { CODEC_ID_PCM_S16LE, CODEC_ID_PCM_S16BE },
+        [AV_SAMPLE_FMT_S32 ] = { CODEC_ID_PCM_S32LE, CODEC_ID_PCM_S32BE },
+        [AV_SAMPLE_FMT_FLT ] = { CODEC_ID_PCM_F32LE, CODEC_ID_PCM_F32BE },
+        [AV_SAMPLE_FMT_DBL ] = { CODEC_ID_PCM_F64LE, CODEC_ID_PCM_F64BE },
+        [AV_SAMPLE_FMT_U8P ] = { CODEC_ID_PCM_U8,    CODEC_ID_PCM_U8    },
+        [AV_SAMPLE_FMT_S16P] = { CODEC_ID_PCM_S16LE, CODEC_ID_PCM_S16BE },
+        [AV_SAMPLE_FMT_S32P] = { CODEC_ID_PCM_S32LE, CODEC_ID_PCM_S32BE },
+        [AV_SAMPLE_FMT_FLTP] = { CODEC_ID_PCM_F32LE, CODEC_ID_PCM_F32BE },
+        [AV_SAMPLE_FMT_DBLP] = { CODEC_ID_PCM_F64LE, CODEC_ID_PCM_F64BE },
+    };
+    if (fmt < 0 || fmt >= AV_SAMPLE_FMT_NB)
+        return CODEC_ID_NONE;
+    if (be < 0 || be > 1)
+        be = AV_NE(1, 0);
+    return map[fmt][be];
+}
+
 #if !HAVE_THREADS
 int ff_thread_init(AVCodecContext *s){
     return -1;

libavcodec/version.h

@@ -21,8 +21,8 @@
 #define AVCODEC_VERSION_H
 
 #define LIBAVCODEC_VERSION_MAJOR 54
-#define LIBAVCODEC_VERSION_MINOR  3
-#define LIBAVCODEC_VERSION_MICRO 101
+#define LIBAVCODEC_VERSION_MINOR  4
+#define LIBAVCODEC_VERSION_MICRO 100
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \