ff_png_zfree       60 libavcodec/png.h void ff_png_zfree(void *opaque, void *ptr);
ff_png_zfree      424 libavcodec/pngdec.c     zstream.zfree  = ff_png_zfree;
ff_png_zfree     1129 libavcodec/pngdec.c     s->zstream.zfree  = ff_png_zfree;
ff_png_zfree     1176 libavcodec/pngdec.c         s->zstream.zfree  = ff_png_zfree;
ff_png_zfree      352 libavcodec/pngenc.c     s->zstream.zfree  = ff_png_zfree;