* Lagarith lossless decoder
* Copyright (c) 2009 Nathan Caldwell <saintdev (at) gmail.com>
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file libavcodec/lagarith.c
+ * @file
* Lagarith lossless decoder
* @author Nathan Caldwell
*/
#include "lagarithrac.h"
enum LagarithFrameType {
- FRAME_RAW = 1, /*!< uncompressed */
- FRAME_U_RGB24 = 2, /*!< unaligned RGB24 */
- FRAME_ARITH_YUY2 = 3, /*!< arithmetic coded YUY2 */
- FRAME_ARITH_RGB24 = 4, /*!< arithmetic coded RGB24 */
- FRAME_SOLID_GRAY = 5, /*!< solid grayscale color frame */
- FRAME_SOLID_COLOR = 6, /*!< solid non-grayscale color frame */
- FRAME_OLD_ARITH_RGB = 7, /*!< obsolete arithmetic coded RGB (no longer encoded by upstream since version 1.1.0) */
- FRAME_ARITH_RGBA = 8, /*!< arithmetic coded RGBA */
- FRAME_SOLID_RGBA = 9, /*!< solid RGBA color frame */
- FRAME_ARITH_YV12 = 10, /*!< arithmetic coded YV12 */
- FRAME_REDUCED_RES = 11, /*!< reduced resolution YV12 frame */
+ FRAME_RAW = 1, /**< uncompressed */
+ FRAME_U_RGB24 = 2, /**< unaligned RGB24 */
+ FRAME_ARITH_YUY2 = 3, /**< arithmetic coded YUY2 */
+ FRAME_ARITH_RGB24 = 4, /**< arithmetic coded RGB24 */
+ FRAME_SOLID_GRAY = 5, /**< solid grayscale color frame */
+ FRAME_SOLID_COLOR = 6, /**< solid non-grayscale color frame */
+ FRAME_OLD_ARITH_RGB = 7, /**< obsolete arithmetic coded RGB (no longer encoded by upstream since version 1.1.0) */
+ FRAME_ARITH_RGBA = 8, /**< arithmetic coded RGBA */
+ FRAME_SOLID_RGBA = 9, /**< solid RGBA color frame */
+ FRAME_ARITH_YV12 = 10, /**< arithmetic coded YV12 */
+ FRAME_REDUCED_RES = 11, /**< reduced resolution YV12 frame */
};
typedef struct LagarithContext {
AVCodecContext *avctx;
AVFrame picture;
DSPContext dsp;
- int zeros; /*!< number of consecutive zero bytes encountered */
- int zeros_rem; /*!< number of zero bytes remaining to output */
+ int zeros; /**< number of consecutive zero bytes encountered */
+ int zeros_rem; /**< number of zero bytes remaining to output */
} LagarithContext;
/**
}
}
} else if (esc_count == 0xff) {
- /* Plane is a solid run of 0 bytes */
+ /* Plane is a solid run of given value */
for (i = 0; i < height; i++)
- memset(dst + i * stride, 0, width);
+ memset(dst + i * stride, src[1], width);
+ /* Do not apply prediction.
+ Note: memset to 0 above, setting first value to src[1]
+ and applying prediction gives the same result. */
+ return 0;
} else {
av_log(l->avctx, AV_LOG_ERROR,
"Invalid zero run escape code! (%#x)\n", esc_count);
return 0;
}
-AVCodec lagarith_decoder = {
- "lagarith",
- CODEC_TYPE_VIDEO,
- CODEC_ID_LAGARITH,
- sizeof(LagarithContext),
- lag_decode_init,
- NULL,
- lag_decode_end,
- lag_decode_frame,
- CODEC_CAP_DR1,
+AVCodec ff_lagarith_decoder = {
+ .name = "lagarith",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = CODEC_ID_LAGARITH,
+ .priv_data_size = sizeof(LagarithContext),
+ .init = lag_decode_init,
+ .close = lag_decode_end,
+ .decode = lag_decode_frame,
+ .capabilities = CODEC_CAP_DR1,
.long_name = NULL_IF_CONFIG_SMALL("Lagarith lossless"),
};