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Diffstat (limited to 'libavcodec/yuv4enc.c')
-rw-r--r--libavcodec/yuv4enc.c91
1 files changed, 91 insertions, 0 deletions
diff --git a/libavcodec/yuv4enc.c b/libavcodec/yuv4enc.c
new file mode 100644
index 0000000000..ed0fc776db
--- /dev/null
+++ b/libavcodec/yuv4enc.c
@@ -0,0 +1,91 @@
+/*
+ * libquicktime yuv4 encoder
+ *
+ * Copyright (c) 2011 Carl Eugen Hoyos
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "avcodec.h"
+#include "internal.h"
+
+static av_cold int yuv4_encode_init(AVCodecContext *avctx)
+{
+ avctx->coded_frame = av_frame_alloc();
+
+ if (!avctx->coded_frame) {
+ av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
+ return AVERROR(ENOMEM);
+ }
+
+ return 0;
+}
+
+static int yuv4_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
+ const AVFrame *pic, int *got_packet)
+{
+ uint8_t *dst;
+ uint8_t *y, *u, *v;
+ int i, j, ret;
+
+ if ((ret = ff_alloc_packet2(avctx, pkt, 6 * (avctx->width + 1 >> 1) * (avctx->height + 1 >> 1))) < 0)
+ return ret;
+ dst = pkt->data;
+
+ avctx->coded_frame->key_frame = 1;
+ avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
+
+ y = pic->data[0];
+ u = pic->data[1];
+ v = pic->data[2];
+
+ for (i = 0; i < avctx->height + 1 >> 1; i++) {
+ for (j = 0; j < avctx->width + 1 >> 1; j++) {
+ *dst++ = u[j] ^ 0x80;
+ *dst++ = v[j] ^ 0x80;
+ *dst++ = y[ 2 * j ];
+ *dst++ = y[ 2 * j + 1];
+ *dst++ = y[pic->linesize[0] + 2 * j ];
+ *dst++ = y[pic->linesize[0] + 2 * j + 1];
+ }
+ y += 2 * pic->linesize[0];
+ u += pic->linesize[1];
+ v += pic->linesize[2];
+ }
+
+ pkt->flags |= AV_PKT_FLAG_KEY;
+ *got_packet = 1;
+ return 0;
+}
+
+static av_cold int yuv4_encode_close(AVCodecContext *avctx)
+{
+ av_freep(&avctx->coded_frame);
+
+ return 0;
+}
+
+AVCodec ff_yuv4_encoder = {
+ .name = "yuv4",
+ .long_name = NULL_IF_CONFIG_SMALL("Uncompressed packed 4:2:0"),
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_YUV4,
+ .init = yuv4_encode_init,
+ .encode2 = yuv4_encode_frame,
+ .close = yuv4_encode_close,
+ .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
+};