lu-zero

static void amf_dump(AVFormatContext *s)
{
    AVIOContext *pb = s->pb;
    int v;
    char buf[1024];

    if (pb->eof_reached)
        return;

    switch ((v = avio_r8(pb))) {

lu-zero

static inline int get_ue_golomb(GetBitContext *gb)
{
    unsigned int buf;

    unsigned int re_index                         = (gb)->index;
    unsigned int __attribute__((unused)) re_cache = 0;
    unsigned int re_size_plus8                    = (gb)->size_in_bits_plus8;
    re_cache = av_bswap32((((const union unaligned_32 *)((gb)->buffer + (re_index >> 3)))->l)) << (re_index & 7);
    buf      = ((uint32_t)re_cache);

lu-zero

# prepare your environment
make distclean
mkdir .build-topic
cd .build-topic
../configure
make -j 8
# expand the file you are interested on
make libavcodec/h264_parser.i
uncrustify -c ~/uncrustify-libav.cfg libavcodec/h264_parser.i

now you can take the expanded macros from there and copy them in h264_parser.c and put as much logging as possible.

lu-zero

#define bistream_read_count(bb) ({\
    int _ret = bitstream_read_count(bb); \
    printf("%s:%d %s, read_count %d\n", __FILE__, __LINE__, __func__, _ret); \
    _ret; \
})

#define bistream_read_bit(bb) ({\
    int _ret = bitstream_read_bit(bb); \
    printf("%s:%d %s, read_bit %d\n", __FILE__, __LINE__, __func__, _ret); \
    _ret; \

lu-zero

#define get_bits_count(gb)                                                        \
    ({                                                                            \
         int _ret = get_bits_count(gb);                                           \
         printf("%s:%d %s, read_count %d\n", __FILE__, __LINE__, __func__, _ret); \
         _ret;                                                                    \
     })

#define get_bits1(gb)                                                           \
    ({                                                                          \
         unsigned int _ret = get_bits1(gb);                                     \

lu-zero

diff --git a/libavcodec/svq3.c b/libavcodec/svq3.c
index 80bc46a..d651406 100644
--- a/libavcodec/svq3.c
+++ b/libavcodec/svq3.c
@@ -75,6 +75,7 @@ typedef struct SVQ3Context {
     H264Picture *cur_pic;
     H264Picture *next_pic;
     H264Picture *last_pic;
+    GetBitContext slice;
     int halfpel_flag;

lu-zero

--- /tmp/apedec.S	2016-04-13 07:07:23.000000000 +0200
+++ libavcodec/apedec.S	2016-04-13 07:08:39.000000000 +0200
@@ -47815,7 +47815,7 @@
 	.loc	18 1308 41              ## /Users/lu_zero/Sources/libav/libavcodec/apedec.c:1308:41
 	andl	$-2147483648, %eax      ## imm = 0xFFFFFFFF80000000
 Ltmp4162:
-	.loc	18 1308 56 is_stmt 0    ## /Users/lu_zero/Sources/libav/libavcodec/apedec.c:1308:56
+	.loc	18 1308 53 is_stmt 0    ## /Users/lu_zero/Sources/libav/libavcodec/apedec.c:1308:53
 	xorl	$-1073741824, %eax      ## imm = 0xFFFFFFFFC0000000
 	.loc	18 1309 55 is_stmt 1    ## /Users/lu_zero/Sources/libav/libavcodec/apedec.c:1309:55

lu-zero

diff --git a/libavcodec/mpegaudiodec_template.c b/libavcodec/mpegaudiodec_template.c
index 820a7ae..51a1943 100644
--- a/libavcodec/mpegaudiodec_template.c
+++ b/libavcodec/mpegaudiodec_template.c
@@ -33,6 +33,7 @@
 #include "internal.h"
 #include "mathops.h"
 #include "mpegaudiodsp.h"
+#include "bitstream_debug.h"
 

lu-zero

Setup

• install msys2 from https://msys2.github.io/
• use the MingW64 shell
• install git and mingw-w64-x86_64-gcc using pacman -S git mingw-w64-x86_64-gcc
• download the SDK from https://software.intel.com/en-us/media-sdk
  • will update PATH and INTELMEDIASDKROOT
• optional download the code samples a https://software.intel.com/en-us/media-sdk-support/code-samples
• Install mfx_dispatch
  • download the repackaged mfx_dispatch using git clone git://github.com/lu-zero/mfx_dispatch

lu-zero

fate .x86_32 # perf stat -r 30  ./avconv_old -v quiet -nostats -threads 1 -t 100 -i /tmp/test.mov -f null -

 Performance counter stats for './avconv_old -v quiet -nostats -threads 1 -t 100 -i /tmp/test.mov -f null -' (30 runs):

      33067.977078      task-clock (msec)         #    0.999 CPUs utilized
              2331      context-switches          #    0.070 K/sec
                13      cpu-migrations            #    0.000 K/sec
              8137      page-faults               #    0.246 K/sec
      125030253229      cycles                    #    3.778 GHz
       25015097060      stalled-cycles-frontend   #   20.02% frontend cycles idle