Commit 0c251257 authored by Derek Buitenhuis's avatar Derek Buitenhuis Committed by Michael Niedermayer

VBLE Decoder

Add a decoder for the VBLE Lossless Codec, which
still has a cult following. Used to be popular
several years ago on doom9.
Signed-off-by: 's avatarDerek Buitenhuis <derek.buitenhuis@gmail.com>
Signed-off-by: 's avatarMichael Niedermayer <michaelni@gmx.at>
parent 5f36065c
......@@ -119,6 +119,7 @@ easier to use. The changes are:
- Properly working defaults in libx264 wrapper, support for native presets.
- Encrypted OMA files support
- Discworld II BMV decoding support
- VBLE Decoder
version 0.8:
......
......@@ -212,6 +212,7 @@ Codecs:
txd.c Ivo van Poorten
ulti* Kostya Shishkov
vb.c Kostya Shishkov
vble.c Derek Buitenhuis
vc1* Kostya Shishkov
vcr1.c Michael Niedermayer
vmnc.c Kostya Shishkov
......
......@@ -532,6 +532,7 @@ following image formats are supported:
@tab Codec used in DOS CD-ROM FlashBack game.
@item Ut Video @tab @tab X
@item V210 Quicktime Uncompressed 4:2:2 10-bit @tab X @tab X
@item VBLE Lossless Codec @tab @tab X
@item VMware Screen Codec / VMware Video @tab @tab X
@tab Codec used in videos captured by VMware.
@item Westwood Studios VQA (Vector Quantized Animation) video @tab @tab X
......
......@@ -413,6 +413,7 @@ OBJS-$(CONFIG_V210_DECODER) += v210dec.o
OBJS-$(CONFIG_V210_ENCODER) += v210enc.o
OBJS-$(CONFIG_V210X_DECODER) += v210x.o
OBJS-$(CONFIG_VB_DECODER) += vb.o
OBJS-$(CONFIG_VBLE_DECODER) += vble.o
OBJS-$(CONFIG_VC1_DECODER) += vc1dec.o vc1.o vc1data.o vc1dsp.o \
msmpeg4.o msmpeg4data.o \
intrax8.o intrax8dsp.o
......
......@@ -214,6 +214,7 @@ void avcodec_register_all(void)
REGISTER_ENCDEC (V210, v210);
REGISTER_DECODER (V210X, v210x);
REGISTER_DECODER (VB, vb);
REGISTER_DECODER (VBLE, vble);
REGISTER_DECODER (VC1, vc1);
REGISTER_DECODER (VC1_CRYSTALHD, vc1_crystalhd);
REGISTER_DECODER (VC1_VDPAU, vc1_vdpau);
......
......@@ -221,6 +221,7 @@ enum CodecID {
#endif
CODEC_ID_UTVIDEO_DEPRECATED,
CODEC_ID_BMV_VIDEO,
CODEC_ID_VBLE,
CODEC_ID_UTVIDEO = 0x800,
CODEC_ID_G2M = MKBETAG( 0 ,'G','2','M'),
......
/*
* VBLE Decoder
* Copyright (c) 2011 Derek Buitenhuis
*
* 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
*/
/**
* @file
* VBLE Decoder
*/
#define ALT_BITSTREAM_READER_LE
#include "avcodec.h"
#include "get_bits.h"
typedef struct {
AVCodecContext *avctx;
int size;
int flags;
uint8_t *len;
uint8_t *val;
} VBLEContext;
static uint8_t vble_read_reverse_unary(GetBitContext *gb)
{
/* At most we need to read 9 bits total to get indices up to 8 */
uint8_t val = show_bits(gb, 8);
if (val) {
val = 7 - av_log2_16bit(av_reverse[val]);
skip_bits(gb, val + 1);
return val;
} else {
skip_bits(gb, 8);
if (get_bits1(gb))
return 8;
}
/* Return something larger than 8 on error */
return UINT8_MAX;
}
static int vble_unpack(VBLEContext *ctx, GetBitContext *gb)
{
int i;
/* Read all the lengths in first */
for (i = 0; i < ctx->size; i++) {
ctx->len[i] = vble_read_reverse_unary(gb);
if (ctx->len[i] == UINT8_MAX)
return -1;
}
/* For any values that have length 0 */
memset(ctx->val, 0, ctx->size);
for (i = 0; i < ctx->size; i++) {
/* Check we have enough bits left */
if (get_bits_left(gb) < ctx->len[i])
return -1;
/* get_bits can't take a length of 0 */
if (ctx->len[i])
ctx->val[i] = (1 << ctx->len[i]) + get_bits(gb, ctx->len[i]) - 1;
}
return 0;
}
static void vble_restore_plane(VBLEContext *ctx, int plane, int offset,
int width, int height)
{
AVFrame *pic = ctx->avctx->coded_frame;
uint8_t *dst = pic->data[plane];
uint8_t *val = ctx->val + offset;
uint8_t *len = ctx->len + offset;
uint8_t a, b, c;
int stride = pic->linesize[plane];
int i, j;
for (i = 0; i < height; i++) {
for (j = 0; j < width; j++) {
dst[j] = (val[j] >> 1) ^ -(val[j] & 1);
/* Top line and left column are not predicted */
if (!j)
continue;
if (!i) {
dst[j] += dst[j - 1];
continue;
}
a = dst[j - 1];
b = dst[j - stride];
c = a + b - dst[j - 1 - stride];
dst[j] += mid_pred(a, b, c);
}
dst += stride;
val += width;
len += width;
}
}
static int vble_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
AVPacket *avpkt)
{
VBLEContext *ctx = avctx->priv_data;
AVFrame *pic = avctx->coded_frame;
GetBitContext gb;
const uint8_t *src = avpkt->data;
int version;
int offset = 0;
int width_uv = avctx->width / 2, height_uv = avctx->height / 2;
pic->reference = 0;
/* Clear buffer if need be */
if (pic->data[0])
avctx->release_buffer(avctx, pic);
/* Allocate buffer */
if (avctx->get_buffer(avctx, pic) < 0) {
av_log(avctx, AV_LOG_ERROR, "Could not allocate buffer.\n");
return AVERROR(ENOMEM);
}
/* Set flags */
pic->key_frame = 1;
pic->pict_type = FF_I_TYPE;
/* Version should always be 1 */
version = AV_RL32(src);
if (version != 1) {
av_log(avctx, AV_LOG_ERROR, "Unsupported VBLE Version: %d\n", version);
return AVERROR_INVALIDDATA;
}
init_get_bits(&gb, src + 4, (avpkt->size - 4) * 8);
/* Unpack */
if (vble_unpack(ctx, &gb) < 0) {
av_log(avctx, AV_LOG_ERROR, "Invalid Code\n");
return AVERROR_INVALIDDATA;
}
/* Restore planes. Should be almost identical to Huffyuv's. */
vble_restore_plane(ctx, 0, offset, avctx->width, avctx->height);
/* Chroma */
if (!(ctx->flags & CODEC_FLAG_GRAY)) {
offset += avctx->width * avctx->height;
vble_restore_plane(ctx, 1, offset, width_uv, height_uv);
offset += width_uv * height_uv;
vble_restore_plane(ctx, 2, offset, width_uv, height_uv);
}
*data_size = sizeof(AVFrame);
*(AVFrame *)data = *pic;
return avpkt->size;
}
static av_cold int vble_decode_close(AVCodecContext *avctx)
{
VBLEContext *ctx = avctx->priv_data;
AVFrame *pic = avctx->coded_frame;
if (pic->data[0])
avctx->release_buffer(avctx, pic);
av_freep(&avctx->coded_frame);
av_freep(&ctx->len);
av_freep(&ctx->val);
return 0;
}
static av_always_inline int vble_error_close(AVCodecContext *avctx,
const char *message)
{
av_log(avctx, AV_LOG_ERROR, message);
vble_decode_close(avctx);
return AVERROR(ENOMEM);
}
static av_cold int vble_decode_init(AVCodecContext *avctx)
{
VBLEContext *ctx = avctx->priv_data;
/* Stash for later use */
ctx->avctx = avctx;
ctx->flags = avctx->flags;
avctx->pix_fmt = PIX_FMT_YUV420P;
avctx->bits_per_raw_sample = 8;
avctx->coded_frame = avcodec_alloc_frame();
if (!avctx->coded_frame)
return vble_error_close(avctx, "Could not allocate frame.\n");
ctx->size = avpicture_get_size(avctx->pix_fmt,
avctx->width, avctx->height);
ctx->len = av_malloc(ctx->size * sizeof(*ctx->len));
if (!ctx->len)
return vble_error_close(avctx, "Could not allocate lengths buffer.\n");
ctx->val = av_malloc(ctx->size * sizeof(*ctx->val));
if (!ctx->val)
return vble_error_close(avctx, "Could not allocate values buffer.\n");
return 0;
}
AVCodec ff_vble_decoder = {
.name = "vble",
.type = AVMEDIA_TYPE_VIDEO,
.id = CODEC_ID_VBLE,
.priv_data_size = sizeof(VBLEContext),
.init = vble_decode_init,
.close = vble_decode_close,
.decode = vble_decode_frame,
.capabilities = CODEC_CAP_DR1,
.long_name = NULL_IF_CONFIG_SMALL("VBLE Lossless Codec"),
};
......@@ -21,7 +21,7 @@
#define AVCODEC_VERSION_H
#define LIBAVCODEC_VERSION_MAJOR 53
#define LIBAVCODEC_VERSION_MINOR 31
#define LIBAVCODEC_VERSION_MINOR 32
#define LIBAVCODEC_VERSION_MICRO 0
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
......
......@@ -285,6 +285,7 @@ const AVCodecTag ff_codec_bmp_tags[] = {
{ CODEC_ID_UTVIDEO, MKTAG('U', 'L', 'R', 'G') },
{ CODEC_ID_UTVIDEO, MKTAG('U', 'L', 'Y', '0') },
{ CODEC_ID_UTVIDEO, MKTAG('U', 'L', 'Y', '2') },
{ CODEC_ID_VBLE, MKTAG('V', 'B', 'L', 'E') },
{ CODEC_ID_NONE, 0 }
};
......
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