ff_png_zfree       55 libavcodec/png.h void ff_png_zfree(void *opaque, void *ptr);
ff_png_zfree      454 libavcodec/pngdec.c     zstream.zfree  = ff_png_zfree;
ff_png_zfree     1502 libavcodec/pngdec.c     s->zstream.zfree  = ff_png_zfree;
ff_png_zfree     1551 libavcodec/pngdec.c         s->zstream.zfree  = ff_png_zfree;
ff_png_zfree     1621 libavcodec/pngdec.c         s->zstream.zfree  = ff_png_zfree;
ff_png_zfree     1087 libavcodec/pngenc.c     s->zstream.zfree  = ff_png_zfree;