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bitstream tracing support
Originally committed as revision 1698 to svn://svn.ffmpeg.org/ffmpeg/trunk
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@ -786,6 +786,46 @@ static always_inline int get_vlc2(GetBitContext *s, VLC_TYPE (*table)[2],
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return code;
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}
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//#define TRACE
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#ifdef TRACE
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static inline void print_bin(int bits, int n){
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int i;
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for(i=n-1; i>=0; i--){
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printf("%d", (bits>>i)&1);
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}
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for(i=n; i<24; i++)
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printf(" ");
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}
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static inline int get_bits_trace(GetBitContext *s, int n, char *file, char *func, int line){
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int r= get_bits(s, n);
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print_bin(r, n);
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printf("%5d %2d %3d bit @%5d in %s %s:%d\n", r, n, r, get_bits_count(s)-n, file, func, line);
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return r;
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}
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static inline int get_vlc_trace(GetBitContext *s, VLC_TYPE (*table)[2], int bits, int max_depth, char *file, char *func, int line){
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int show= show_bits(s, 24);
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int pos= get_bits_count(s);
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int r= get_vlc2(s, table, bits, max_depth);
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int len= get_bits_count(s) - pos;
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int bits2= show>>(24-len);
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print_bin(bits2, len);
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printf("%5d %2d %3d vlc @%5d in %s %s:%d\n", bits2, len, r, pos, file, func, line);
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return r;
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}
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#define get_bits(s, n) get_bits_trace(s, n, __FILE__, __PRETTY_FUNCTION__, __LINE__)
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#define get_bits1(s) get_bits_trace(s, 1, __FILE__, __PRETTY_FUNCTION__, __LINE__)
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#define get_vlc(s, vlc) get_vlc_trace(s, vlc->table, vlc->bits, 3, __FILE__, __PRETTY_FUNCTION__, __LINE__)
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#define get_vlc2(s, tab, bits, max) get_vlc_trace(s, tab, bits, max, __FILE__, __PRETTY_FUNCTION__, __LINE__)
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#endif
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/* define it to include statistics code (useful only for optimizing
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codec efficiency */
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