from waftools.plugin import plugin

## Code fragments for configuration
avcodec_send_packet_fragment = """
#ifdef HAVE_LIBAVCODEC_AVCODEC_H
# include "libavcodec/avcodec.h"
#else
# include "avcodec.h"
#endif
int main(void) {
    AVCodecContext *ctx;
    AVPacket *pkt;

    avcodec_send_packet (ctx, pkt);

    return 0;
}
"""

avcodec_free_frame_fragment = """
#ifdef HAVE_LIBAVCODEC_AVCODEC_H
# include "libavcodec/avcodec.h"
#else
# include "avcodec.h"
#endif
int main(void) {
    AVFrame *frame;

    avcodec_free_frame (&frame);

    return 0;
}
"""

def plugin_configure(conf):
    conf.check_cfg(package="libavcodec", uselib_store="avcodec",
            args="--cflags --libs")
    conf.check_cc(header_name="avcodec.h", uselib="avcodec", type="cshlib", mandatory=False)
    conf.check_cc(header_name="libavcodec/avcodec.h", uselib="avcodec", type="cshlib", mandatory=False)

    # mandatory function avcodec_send_packet available since
    # * ffmpeg: commit 7fc329e, lavc 57.37.100, release 3.1
    # * libav: commit 05f6670, lavc 57.16.0, release 12
    conf.check_cc(fragment=avcodec_send_packet_fragment, uselib="avcodec",
                  uselib_store="avcodec_send_packet",
                  msg="Checking for function avcodec_send_packet", mandatory=True)

    # non-mandatory function avcodec_free_frame since
    # * ffmpeg: commit 46a3595, lavc 54.59.100, release 1.0
    # * libav: commit a42aada, lavc 54.28.0, release 9
    conf.check_cc(fragment=avcodec_free_frame_fragment, uselib="avcodec",
                  uselib_store="avcodec_free_frame",
                  msg="Checking for function avcodec_free_frame", mandatory=False)

configure, build = plugin('avcodec', configure=plugin_configure,
                          libs=["avcodec"])
