ff_png_get_nb_channels 62 libavcodec/png.h int ff_png_get_nb_channels(int color_type); ff_png_get_nb_channels 595 libavcodec/pngdec.c s->channels = ff_png_get_nb_channels(s->color_type); ff_png_get_nb_channels 348 libavcodec/pngenc.c bits_per_pixel = ff_png_get_nb_channels(color_type) * bit_depth;