y41p encoder and decoder

y41p is a packed 12-bit 4:1:1 YUV format used by Brooktree.

Fixes issue 1123 / ticket #102.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Changelog

@@ -16,6 +16,7 @@ version next:
 - Indeo 4 decoder
 - SMJPEG demuxer
 - Automatic thread count based on detection number of (available) CPU cores
+- y41p Brooktree Uncompressed 4:1:1 12-bit encoder and decoder
 
 
 version 0.9:

doc/general.texi

@@ -445,6 +445,7 @@ following image formats are supported:
     @tab Used in some games from Bethesda Softworks.
 @item Bink Video             @tab     @tab  X
 @item Bitmap Brothers JV video  @tab   @tab X
+@item y41p Brooktree uncompressed 4:1:1 12-bit     @tab  X  @tab  X
 @item Brute Force & Ignorance   @tab   @tab X
     @tab Used in the game Flash Traffic: City of Angels.
 @item C93 video              @tab     @tab  X

libavcodec/Makefile

@@ -467,6 +467,8 @@ OBJS-$(CONFIG_XBIN_DECODER)            += bintext.o cga_data.o
 OBJS-$(CONFIG_XL_DECODER)              += xl.o
 OBJS-$(CONFIG_XSUB_DECODER)            += xsubdec.o
 OBJS-$(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_ZLIB_DECODER)            += lcldec.o
 OBJS-$(CONFIG_ZLIB_ENCODER)            += lclenc.o

libavcodec/allcodecs.c

@@ -243,6 +243,7 @@ void avcodec_register_all(void)
     REGISTER_DECODER (XAN_WC3, xan_wc3);
     REGISTER_DECODER (XAN_WC4, xan_wc4);
     REGISTER_DECODER (XL, xl);
+    REGISTER_ENCDEC  (Y41P, y41p);
     REGISTER_DECODER (YOP, yop);
     REGISTER_ENCDEC  (ZLIB, zlib);
     REGISTER_ENCDEC  (ZMBV, zmbv);

libavcodec/avcodec.h

@@ -255,6 +255,7 @@ enum CodecID {
     CODEC_ID_VBLE,
     CODEC_ID_DXTORY,
     CODEC_ID_V410,
+    CODEC_ID_Y41P       = MKBETAG('Y','4','1','P'),
     CODEC_ID_UTVIDEO = 0x800,
     CODEC_ID_ESCAPE130  = MKBETAG('E','1','3','0'),
 

libavcodec/version.h

@@ -21,8 +21,8 @@
 #define AVCODEC_VERSION_H
 
 #define LIBAVCODEC_VERSION_MAJOR 53
-#define LIBAVCODEC_VERSION_MINOR 49
-#define LIBAVCODEC_VERSION_MICRO 102
+#define LIBAVCODEC_VERSION_MINOR 50
+#define LIBAVCODEC_VERSION_MICRO 100
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \

libavcodec/y41pdec.c

+/*
+ * y41p decoder
+ *
+ * Copyright (c) 2012 Paul B Mahol
+ *
+ * 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 y41p_decode_init(AVCodecContext *avctx)
+{
+    avctx->pix_fmt             = PIX_FMT_YUV411P;
+    avctx->bits_per_raw_sample = 12;
+
+    if (avctx->width & 7) {
+        av_log(avctx, AV_LOG_WARNING, "y41p requires width to be divisible by 8.\n");
+    }
+
+    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 y41p_decode_frame(AVCodecContext *avctx, void *data,
+                             int *data_size, AVPacket *avpkt)
+{
+    AVFrame *pic = avctx->coded_frame;
+    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 < 1.5 * avctx->height * avctx->width) {
+        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;
+
+    for (i = avctx->height - 1; i >= 0 ; i--) {
+        y = &pic->data[0][i * pic->linesize[0]];
+        u = &pic->data[1][i * pic->linesize[1]];
+        v = &pic->data[2][i * pic->linesize[2]];
+        for (j = 0; j < avctx->width; j += 8) {
+            *(u++) = *src++;
+            *(y++) = *src++;
+            *(v++) = *src++;
+            *(y++) = *src++;
+
+            *(u++) = *src++;
+            *(y++) = *src++;
+            *(v++) = *src++;
+            *(y++) = *src++;
+
+            *(y++) = *src++;
+            *(y++) = *src++;
+            *(y++) = *src++;
+            *(y++) = *src++;
+        }
+    }
+
+    *data_size = sizeof(AVFrame);
+    *(AVFrame *)data = *pic;
+
+    return avpkt->size;
+}
+
+static av_cold int y41p_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_y41p_decoder = {
+    .name         = "y41p",
+    .type         = AVMEDIA_TYPE_VIDEO,
+    .id           = CODEC_ID_Y41P,
+    .init         = y41p_decode_init,
+    .decode       = y41p_decode_frame,
+    .close        = y41p_decode_close,
+    .capabilities = CODEC_CAP_DR1,
+    .long_name    = NULL_IF_CONFIG_SMALL("Uncompressed YUV 4:1:1 12-bit"),
+};

libavcodec/y41penc.c

+/*
+ * y41p encoder
+ *
+ * Copyright (c) 2012 Paul B Mahol
+ *
+ * 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 y41p_encode_init(AVCodecContext *avctx)
+{
+    if (avctx->width & 7) {
+        av_log(avctx, AV_LOG_ERROR, "y41p requires width to be divisible by 8.\n");
+        return AVERROR_INVALIDDATA;
+    }
+
+    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 y41p_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;
+
+    if (buf_size < avctx->width * avctx->height * 1.5) {
+        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;
+
+    for (i = avctx->height - 1; i >= 0; i--) {
+        y = &pic->data[0][i * pic->linesize[0]];
+        u = &pic->data[1][i * pic->linesize[1]];
+        v = &pic->data[2][i * pic->linesize[2]];
+        for (j = 0; j < avctx->width; j += 8) {
+            *(dst++) = *(u++);
+            *(dst++) = *(y++);
+            *(dst++) = *(v++);
+            *(dst++) = *(y++);
+
+            *(dst++) = *(u++);
+            *(dst++) = *(y++);
+            *(dst++) = *(v++);
+            *(dst++) = *(y++);
+
+            *(dst++) = *(y++);
+            *(dst++) = *(y++);
+            *(dst++) = *(y++);
+            *(dst++) = *(y++);
+        }
+    }
+
+    return avctx->width * avctx->height * 1.5;
+}
+
+static av_cold int y41p_encode_close(AVCodecContext *avctx)
+{
+    av_freep(&avctx->coded_frame);
+
+    return 0;
+}
+
+AVCodec ff_y41p_encoder = {
+    .name         = "y41p",
+    .type         = AVMEDIA_TYPE_VIDEO,
+    .id           = CODEC_ID_Y41P,
+    .init         = y41p_encode_init,
+    .encode       = y41p_encode_frame,
+    .close        = y41p_encode_close,
+    .pix_fmts     = (const enum PixelFormat[]) { PIX_FMT_YUV411P,
+                                                 PIX_FMT_NONE },
+    .long_name    = NULL_IF_CONFIG_SMALL("Uncompressed YUV 4:1:1 12-bit"),
+};

libavformat/isom.c

@@ -91,6 +91,7 @@ const AVCodecTag codec_movvideo_tags[] = {
     { CODEC_ID_R210,   MKTAG('r', '2', '1', '0') }, /* UNCOMPRESSED 10BIT RGB */
     { CODEC_ID_V210,   MKTAG('v', '2', '1', '0') }, /* UNCOMPRESSED 10BIT 4:2:2 */
     { CODEC_ID_V410,   MKTAG('v', '4', '1', '0') }, /* UNCOMPRESSED 10BIT 4:4:4 */
+    { CODEC_ID_Y41P,   MKTAG('Y', '4', '1', 'P') }, /* UNCOMPRESSED 12BIT 4:1:1 */
 
     { CODEC_ID_MJPEG,  MKTAG('j', 'p', 'e', 'g') }, /* PhotoJPEG */
     { CODEC_ID_MJPEG,  MKTAG('m', 'j', 'p', 'a') }, /* Motion-JPEG (format A) */

libavformat/riff.c

@@ -290,6 +290,7 @@ const AVCodecTag ff_codec_bmp_tags[] = {
     { CODEC_ID_VBLE,         MKTAG('V', 'B', 'L', 'E') },
     { CODEC_ID_ESCAPE130,    MKTAG('E', '1', '3', '0') },
     { CODEC_ID_DXTORY,       MKTAG('x', 't', 'o', 'r') },
+    { CODEC_ID_Y41P,         MKTAG('Y', '4', '1', 'P') },
     { CODEC_ID_NONE,         0 }
 };