yuv4 libquicktime packed 4:2:0 encoder and decoder.

Reviewed-by: Derek Buitenhuis
Reviewed-by: Paul B Mahol

6 files changed, 207 insertions, 1 deletions

diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 7bf16880f9..0060433c6c 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -473,6 +473,8 @@ OBJS-$(CONFIG_XSUB_ENCODER)            += xsubenc.o
 OBJS-$(CONFIG_Y41P_DECODER)            += y41pdec.o
 OBJS-$(CONFIG_Y41P_ENCODER)            += y41penc.o
 OBJS-$(CONFIG_YOP_DECODER)             += yop.o
+OBJS-$(CONFIG_YUV4_DECODER)            += yuv4dec.o
+OBJS-$(CONFIG_YUV4_ENCODER)            += yuv4enc.o
 OBJS-$(CONFIG_ZLIB_DECODER)            += lcldec.o
 OBJS-$(CONFIG_ZLIB_ENCODER)            += lclenc.o
 OBJS-$(CONFIG_ZMBV_DECODER)            += zmbv.o
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index aafb7201c1..a15d56262e 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -247,6 +247,7 @@ void avcodec_register_all(void)
     REGISTER_DECODER (XL, xl);
     REGISTER_ENCDEC  (Y41P, y41p);
     REGISTER_DECODER (YOP, yop);
+    REGISTER_ENCDEC  (YUV4, yuv4);
     REGISTER_ENCDEC  (ZLIB, zlib);
     REGISTER_ENCDEC  (ZMBV, zmbv);
 
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index e37cb0df67..2b7ac65c13 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -262,6 +262,7 @@ enum CodecID {
 
     CODEC_ID_G2M        = MKBETAG( 0 ,'G','2','M'),
     CODEC_ID_V308       = MKBETAG('V','3','0','8'),
+    CODEC_ID_YUV4       = MKBETAG('Y','U','V','4'),
 
     /* various PCM "codecs" */
     CODEC_ID_FIRST_AUDIO = 0x10000,     ///< A dummy id pointing at the start of audio codecs
diff --git a/libavcodec/version.h b/libavcodec/version.h
index 30e05898ef..12d9082802 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -21,7 +21,7 @@
 #define AVCODEC_VERSION_H
 
 #define LIBAVCODEC_VERSION_MAJOR 53
-#define LIBAVCODEC_VERSION_MINOR 52
+#define LIBAVCODEC_VERSION_MINOR 53
 #define LIBAVCODEC_VERSION_MICRO 100
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
diff --git a/libavcodec/yuv4dec.c b/libavcodec/yuv4dec.c
new file mode 100644
index 0000000000..206accbf0d
--- /dev/null
+++ b/libavcodec/yuv4dec.c
@@ -0,0 +1,109 @@
+/*
+ * libquicktime yuv4 decoder
+ *
+ * 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"
+
+static av_cold int yuv4_decode_init(AVCodecContext *avctx)
+{
+    avctx->pix_fmt = PIX_FMT_YUV420P;
+
+    avctx->coded_frame = avcodec_alloc_frame();
+
+    if (!avctx->coded_frame) {
+        av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
+        return AVERROR(ENOMEM);
+    }
+
+    return 0;
+}
+
+static int yuv4_decode_frame(AVCodecContext *avctx, void *data,
+                             int *data_size, AVPacket *avpkt)
+{
+    AVFrame *pic = avctx->coded_frame;
+    const uint8_t *src = avpkt->data;
+    uint8_t *y, *u, *v;
+    int i, j;
+
+    if (pic->data[0])
+        avctx->release_buffer(avctx, pic);
+
+    if (avpkt->size < 6 * (avctx->width + 1 >> 1) * (avctx->height + 1 >> 1)) {
+        av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
+        return AVERROR(EINVAL);
+    }
+
+    pic->reference = 0;
+
+    if (avctx->get_buffer(avctx, pic) < 0) {
+        av_log(avctx, AV_LOG_ERROR, "Could not allocate buffer.\n");
+        return AVERROR(ENOMEM);
+    }
+
+    pic->key_frame = 1;
+    pic->pict_type = FF_I_TYPE;
+
+    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++) {
+            u[j] = *src++ ^ 0x80;
+            v[j] = *src++ ^ 0x80;
+            y[                   2 * j    ] = *src++;
+            y[                   2 * j + 1] = *src++;
+            y[pic->linesize[0] + 2 * j    ] = *src++;
+            y[pic->linesize[0] + 2 * j + 1] = *src++;
+        }
+
+        y += 2 * pic->linesize[0];
+        u +=     pic->linesize[1];
+        v +=     pic->linesize[2];
+    }
+
+    *data_size = sizeof(AVFrame);
+    *(AVFrame *)data = *pic;
+
+    return avpkt->size;
+}
+
+static av_cold int yuv4_decode_close(AVCodecContext *avctx)
+{
+    if (avctx->coded_frame->data[0])
+        avctx->release_buffer(avctx, avctx->coded_frame);
+
+    av_freep(&avctx->coded_frame);
+
+    return 0;
+}
+
+AVCodec ff_yuv4_decoder = {
+    .name         = "yuv4",
+    .type         = AVMEDIA_TYPE_VIDEO,
+    .id           = CODEC_ID_YUV4,
+    .init         = yuv4_decode_init,
+    .decode       = yuv4_decode_frame,
+    .close        = yuv4_decode_close,
+    .capabilities = CODEC_CAP_DR1,
+    .long_name    = NULL_IF_CONFIG_SMALL("Uncompressed packed 4:2:0"),
+};
diff --git a/libavcodec/yuv4enc.c b/libavcodec/yuv4enc.c
new file mode 100644
index 0000000000..f15b7e82de
--- /dev/null
+++ b/libavcodec/yuv4enc.c
@@ -0,0 +1,93 @@
+/*
+ * 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"
+
+static av_cold int yuv4_encode_init(AVCodecContext *avctx)
+{
+    avctx->coded_frame = avcodec_alloc_frame();
+
+    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, uint8_t *buf,
+                             int buf_size, void *data)
+{
+    AVFrame *pic = data;
+    uint8_t *dst = buf;
+    uint8_t *y, *u, *v;
+    int i, j;
+    int output_size = 0;
+
+    if (buf_size < 6 * (avctx->width + 1 >> 1) * (avctx->height + 1 >> 1)) {
+        av_log(avctx, AV_LOG_ERROR, "Out buffer is too small.\n");
+        return AVERROR(ENOMEM);
+    }
+
+    avctx->coded_frame->reference = 0;
+    avctx->coded_frame->key_frame = 1;
+    avctx->coded_frame->pict_type = FF_I_TYPE;
+
+    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];
+            output_size += 6;
+        }
+        y += 2 * pic->linesize[0];
+        u +=     pic->linesize[1];
+        v +=     pic->linesize[2];
+    }
+
+    return output_size;
+}
+
+static av_cold int yuv4_encode_close(AVCodecContext *avctx)
+{
+    av_freep(&avctx->coded_frame);
+
+    return 0;
+}
+
+AVCodec ff_yuv4_encoder = {
+    .name         = "yuv4",
+    .type         = AVMEDIA_TYPE_VIDEO,
+    .id           = CODEC_ID_YUV4,
+    .init         = yuv4_encode_init,
+    .encode       = yuv4_encode_frame,
+    .close        = yuv4_encode_close,
+    .pix_fmts     = (const enum PixelFormat[]){ PIX_FMT_YUV420P, PIX_FMT_NONE },
+    .long_name    = NULL_IF_CONFIG_SMALL("Uncompressed packed 4:2:0"),
+};