mpeg4audio: Make avpriv_copy_pce_data() inline

The function currently accepts a PutBitContext and a GetBitContext,
which hardcodes their sizes into the lavc ABI. Since the function is
quite small and only called in a few places, the simplest solution is
making it inline, thus avoiding a runtime dependency completely.
Signed-off-by: Diego Biurrun <diego@biurrun.de>

libavcodec/aac_adtstoasc_bsf.c

@@ -91,7 +91,7 @@ static int aac_adtstoasc_filter(AVBSFContext *bsfc, AVPacket *out)
                 goto fail;
             }
             init_put_bits(&pb, pce_data, MAX_PCE_SIZE);
-            pce_size = avpriv_copy_pce_data(&pb, &gb)/8;
+            pce_size = ff_copy_pce_data(&pb, &gb) / 8;
             flush_put_bits(&pb);
             in->size -= get_bits_count(&gb)/8;
             in->data += get_bits_count(&gb)/8;

libavcodec/mpeg4audio.c

@@ -145,43 +145,3 @@ int avpriv_mpeg4audio_get_config(MPEG4AudioConfig *c, const uint8_t *buf,
 
     return specific_config_bitindex;
 }
-
-static av_always_inline unsigned int copy_bits(PutBitContext *pb,
-                                               GetBitContext *gb,
-                                               int bits)
-{
-    unsigned int el = get_bits(gb, bits);
-    put_bits(pb, bits, el);
-    return el;
-}
-
-int avpriv_copy_pce_data(PutBitContext *pb, GetBitContext *gb)
-{
-    int five_bit_ch, four_bit_ch, comment_size, bits;
-    int offset = put_bits_count(pb);
-
-    copy_bits(pb, gb, 10);                  //Tag, Object Type, Frequency
-    five_bit_ch  = copy_bits(pb, gb, 4);    //Front
-    five_bit_ch += copy_bits(pb, gb, 4);    //Side
-    five_bit_ch += copy_bits(pb, gb, 4);    //Back
-    four_bit_ch  = copy_bits(pb, gb, 2);    //LFE
-    four_bit_ch += copy_bits(pb, gb, 3);    //Data
-    five_bit_ch += copy_bits(pb, gb, 4);    //Coupling
-    if (copy_bits(pb, gb, 1))               //Mono Mixdown
-        copy_bits(pb, gb, 4);
-    if (copy_bits(pb, gb, 1))               //Stereo Mixdown
-        copy_bits(pb, gb, 4);
-    if (copy_bits(pb, gb, 1))               //Matrix Mixdown
-        copy_bits(pb, gb, 3);
-    for (bits = five_bit_ch*5+four_bit_ch*4; bits > 16; bits -= 16)
-        copy_bits(pb, gb, 16);
-    if (bits)
-        copy_bits(pb, gb, bits);
-    avpriv_align_put_bits(pb);
-    align_get_bits(gb);
-    comment_size = copy_bits(pb, gb, 8);
-    for (; comment_size > 0; comment_size--)
-        copy_bits(pb, gb, 8);
-
-    return put_bits_count(pb) - offset;
-}

libavcodec/mpeg4audio.h

@@ -23,6 +23,9 @@
 #define AVCODEC_MPEG4AUDIO_H
 
 #include <stdint.h>
+
+#include "libavutil/attributes.h"
+
 #include "get_bits.h"
 #include "put_bits.h"
 
@@ -105,6 +108,44 @@ enum AudioObjectType {
 #define MAX_PCE_SIZE 304 ///<Maximum size of a PCE including the 3-bit ID_PCE
                          ///<marker and the comment
 
-int avpriv_copy_pce_data(PutBitContext *pb, GetBitContext *gb);
+static av_always_inline unsigned int ff_pce_copy_bits(PutBitContext *pb,
+                                                      GetBitContext *gb,
+                                                      int bits)
+{
+    unsigned int el = get_bits(gb, bits);
+    put_bits(pb, bits, el);
+    return el;
+}
+
+static inline int ff_copy_pce_data(PutBitContext *pb, GetBitContext *gb)
+{
+    int five_bit_ch, four_bit_ch, comment_size, bits;
+    int offset = put_bits_count(pb);
+
+    ff_pce_copy_bits(pb, gb, 10);               // Tag, Object Type, Frequency
+    five_bit_ch  = ff_pce_copy_bits(pb, gb, 4); // Front
+    five_bit_ch += ff_pce_copy_bits(pb, gb, 4); // Side
+    five_bit_ch += ff_pce_copy_bits(pb, gb, 4); // Back
+    four_bit_ch  = ff_pce_copy_bits(pb, gb, 2); // LFE
+    four_bit_ch += ff_pce_copy_bits(pb, gb, 3); // Data
+    five_bit_ch += ff_pce_copy_bits(pb, gb, 4); // Coupling
+    if (ff_pce_copy_bits(pb, gb, 1))            // Mono Mixdown
+        ff_pce_copy_bits(pb, gb, 4);
+    if (ff_pce_copy_bits(pb, gb, 1))            // Stereo Mixdown
+        ff_pce_copy_bits(pb, gb, 4);
+    if (ff_pce_copy_bits(pb, gb, 1))            // Matrix Mixdown
+        ff_pce_copy_bits(pb, gb, 3);
+    for (bits = five_bit_ch*5+four_bit_ch*4; bits > 16; bits -= 16)
+        ff_pce_copy_bits(pb, gb, 16);
+    if (bits)
+        ff_pce_copy_bits(pb, gb, bits);
+    avpriv_align_put_bits(pb);
+    align_get_bits(gb);
+    comment_size = ff_pce_copy_bits(pb, gb, 8);
+    for (; comment_size > 0; comment_size--)
+        ff_pce_copy_bits(pb, gb, 8);
+
+    return put_bits_count(pb) - offset;
+}
 
 #endif /* AVCODEC_MPEG4AUDIO_H */

libavformat/adtsenc.c

@@ -79,7 +79,7 @@ static int adts_decode_extradata(AVFormatContext *s, ADTSContext *adts, uint8_t
         init_put_bits(&pb, adts->pce_data, MAX_PCE_SIZE);
 
         put_bits(&pb, 3, 5); //ID_PCE
-        adts->pce_size = (avpriv_copy_pce_data(&pb, &gb) + 3) / 8;
+        adts->pce_size = (ff_copy_pce_data(&pb, &gb) + 3) / 8;
         flush_put_bits(&pb);
     }
 

libavformat/latmenc.c

@@ -111,7 +111,7 @@ static int latm_write_frame_header(AVFormatContext *s, PutBitContext *bs)
             avpriv_copy_bits(bs, par->extradata, ctx->off + 3);
 
             if (!ctx->channel_conf) {
-                avpriv_copy_pce_data(bs, &gb);
+                ff_copy_pce_data(bs, &gb);
             }
         }