+/*
+ * Wrap the new avcodec API from FFMpeg 3.1 to minimize the changes in the
+ * user code.
+ *
+ * If the use of the wrappers were to be made conditional, a check like the
+ * following could be used:
+ *
+ * #if (LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(57, 48, 101))
+ *
+ * As derived from the APIchanges document:
+ * https://github.com/FFmpeg/FFmpeg/blob/master/doc/APIchanges
+ *
+ * The wrapper implementation has been taken from:
+ * https://blogs.gentoo.org/lu_zero/2016/03/29/new-avcodec-api/
+ */
+static int decode(AVCodecContext *avctx, AVFrame *frame, int *got_frame, AVPacket *pkt)
+{
+ int ret;
+
+ *got_frame = 0;
+
+ if (pkt) {
+ ret = avcodec_send_packet(avctx, pkt);
+ /*
+ * In particular, we don't expect AVERROR(EAGAIN), because we
+ * read all decoded frames with avcodec_receive_frame() until
+ * done.
+ */
+ if (ret < 0)
+ return ret == AVERROR_EOF ? 0 : ret;
+ }
+
+ ret = avcodec_receive_frame(avctx, frame);
+ if (ret < 0 && ret != AVERROR(EAGAIN) && ret != AVERROR_EOF)
+ return ret;
+ if (ret >= 0)
+ *got_frame = 1;
+
+ return 0;
+}
+
+static int encode(AVCodecContext *avctx, AVPacket *pkt, int *got_packet, AVFrame *frame)
+{
+ int ret;
+
+ *got_packet = 0;
+
+ ret = avcodec_send_frame(avctx, frame);
+ if (ret < 0)
+ return ret;
+
+ ret = avcodec_receive_packet(avctx, pkt);
+ if (!ret)
+ *got_packet = 1;
+ if (ret == AVERROR(EAGAIN))
+ return 0;
+
+ return ret;
+}
+
+
projects / libam7xxx.git / blobdiff