videolan
/
ffmpeg
mirror of https://git.videolan.org/git/ffmpeg.git
1
Fork 0
Code Releases Activity

Silicon Graphics RLE 8-bit video decoder 

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
This commit is contained in:
Peter Ross 2012-12-17 20:37:54 +11:00 committed by Vittorio Giovara
parent 34c5a6660a
commit 07761294fc
9 changed files with 174 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
Changelog
View File

@ -19,6 +19,7 @@ version <next>:
- LucasArts SMUSH demuxer
- MP2 encoding via TwoLAME
- asettb filter
- Silicon Graphics RLE 8-bit video decoder
version 10:

1
doc/general.texi
View File

@ -693,6 +693,7 @@ following image formats are supported:
@tab used in some games by Entertainment Software Partners
@item Sierra VMD video @tab @tab X
@tab Used in Sierra VMD files.
@item Silicon Graphics RLE 8-bit video @tab @tab X
@item Smacker video @tab @tab X
@tab Video encoding used in Smacker.
@item SMPTE VC-1 @tab @tab X

1
libavcodec/Makefile
View File

@ -329,6 +329,7 @@ OBJS-$(CONFIG_S302M_DECODER) += s302m.o
OBJS-$(CONFIG_SANM_DECODER) += sanm.o
OBJS-$(CONFIG_SGI_DECODER) += sgidec.o
OBJS-$(CONFIG_SGI_ENCODER) += sgienc.o rle.o
OBJS-$(CONFIG_SGIRLE_DECODER) += sgirledec.o
OBJS-$(CONFIG_SHORTEN_DECODER) += shorten.o
OBJS-$(CONFIG_SIPR_DECODER) += sipr.o acelp_pitch_delay.o \
celp_math.o acelp_vectors.o \

1
libavcodec/allcodecs.c
View File

@ -228,6 +228,7 @@ void avcodec_register_all(void)
REGISTER_DECODER(S302M, s302m);
REGISTER_DECODER(SANM, sanm);
REGISTER_ENCDEC (SGI, sgi);
REGISTER_DECODER(SGIRLE, sgirle);
REGISTER_DECODER(SMACKER, smacker);
REGISTER_DECODER(SMC, smc);
REGISTER_DECODER(SP5X, sp5x);

1
libavcodec/avcodec.h
View File

@ -290,6 +290,7 @@ enum AVCodecID {
AV_CODEC_ID_EXR,
AV_CODEC_ID_VP7,
AV_CODEC_ID_SANM,
AV_CODEC_ID_SGIRLE,
/* various PCM "codecs" */
AV_CODEC_ID_FIRST_AUDIO = 0x10000, ///< A dummy id pointing at the start of audio codecs

7
libavcodec/codec_desc.c
View File

@ -1113,6 +1113,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
.long_name = NULL_IF_CONFIG_SMALL("LucasArts SANM video"),
.props = AV_CODEC_PROP_LOSSY,
},
{
.id = AV_CODEC_ID_SGIRLE,
.type = AVMEDIA_TYPE_VIDEO,
.name = "sgirle",
.long_name = NULL_IF_CONFIG_SMALL("SGI RLE 8-bit"),
.props = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSLESS,
},
/* image codecs */
{

160
libavcodec/sgirledec.c Normal file
View File

@ -0,0 +1,160 @@
/*
* Silicon Graphics RLE 8-bit video decoder
* Copyright (c) 2012 Peter Ross
*
* This file is part of Libav.
*
* 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.
*
* 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* Silicon Graphics RLE 8-bit video decoder
* @note Data is packed in rbg323 with rle, contained in mv or mov.
* The algorithm and pixfmt are subtly different from SGI images.
*/
#include "libavutil/common.h"
#include "avcodec.h"
#include "internal.h"
typedef struct SGIRLEContext {
AVFrame *frame;
} SGIRLEContext;
static av_cold int sgirle_decode_init(AVCodecContext *avctx)
{
SGIRLEContext *s = avctx->priv_data;
avctx->pix_fmt = AV_PIX_FMT_BGR8;
s->frame = av_frame_alloc();
if (!s->frame)
return AVERROR(ENOMEM);
return 0;
}
/**
* Convert SGI RBG323 pixel into AV_PIX_FMT_BGR8
* SGI RGB data is packed as 8bpp, (msb)3R 2B 3G(lsb)
*/
#define RBG323_TO_BGR8(x) (((x << 3) & 0xC0) | \
((x << 3) & 0x38) | \
((x >> 5) & 7))
static av_always_inline
void rbg323_to_bgr8(uint8_t *dst, const uint8_t *src, int size)
{
int i;
for (i = 0; i < size; i++)
dst[i] = RBG323_TO_BGR8(src[i]);
}
/**
* @param[out] dst Destination buffer
* @param[in] src Source buffer
* @param src_size Source buffer size (bytes)
* @param width Width of destination buffer (pixels)
* @param height Height of destination buffer (pixels)
* @param linesize Line size of destination buffer (bytes)
*
* @return <0 on error
*/
static int decode_sgirle8(AVCodecContext *avctx, uint8_t *dst,
const uint8_t *src, int src_size,
int width, int height, ptrdiff_t linesize)
{
const uint8_t *src_end = src + src_size;
int x = 0, y = 0;
#define INC_XY(n) \
x += n; \
if (x >= width) { \
y++; \
if (y >= height) \
return 0; \
x = 0; \
}
while (src_end - src >= 2) {
uint8_t v = *src++;
if (v > 0 && v < 0xC0) {
do {
int length = FFMIN(v, width - x);
if (length <= 0)
break;
memset(dst + y * linesize + x, RBG323_TO_BGR8(*src), length);
INC_XY(length);
v -= length;
} while (v > 0);
src++;
} else if (v >= 0xC1) {
v -= 0xC0;
do {
int length = FFMIN3(v, width - x, src_end - src);
if (src_end - src < length || length <= 0)
break;
rbg323_to_bgr8(dst + y * linesize + x, src, length);
INC_XY(length);
src += length;
v -= length;
} while (v > 0);
} else {
av_log(avctx, AV_LOG_ERROR, "Invalid opcode %d.\n", v);
return AVERROR_INVALIDDATA;
}
}
return 0;
}
static int sgirle_decode_frame(AVCodecContext *avctx, void *data,
int *got_frame, AVPacket *avpkt)
{
SGIRLEContext *s = avctx->priv_data;
int ret;
if ((ret = ff_reget_buffer(avctx, s->frame)) < 0)
return ret;
ret = decode_sgirle8(avctx, s->frame->data[0], avpkt->data, avpkt->size,
avctx->width, avctx->height, s->frame->linesize[0]);
if (ret < 0)
return ret;
*got_frame = 1;
if ((ret = av_frame_ref(data, s->frame)) < 0)
return ret;
return avpkt->size;
}
static av_cold int sgirle_decode_end(AVCodecContext *avctx)
{
SGIRLEContext *s = avctx->priv_data;
av_frame_free(&s->frame);
return 0;
}
AVCodec ff_sgirle_decoder = {
.name = "sgirle",
.long_name = NULL_IF_CONFIG_SMALL("Silicon Graphics RLE 8-bit video"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_SGIRLE,
.priv_data_size = sizeof(SGIRLEContext),
.init = sgirle_decode_init,
.close = sgirle_decode_end,
.decode = sgirle_decode_frame,
.capabilities = CODEC_CAP_DR1,
};

2
libavcodec/version.h
View File

@ -29,7 +29,7 @@
#include "libavutil/version.h"
#define LIBAVCODEC_VERSION_MAJOR 55
#define LIBAVCODEC_VERSION_MINOR 46
#define LIBAVCODEC_VERSION_MINOR 47
#define LIBAVCODEC_VERSION_MICRO 0
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \

1
libavformat/isom.c
View File

@ -141,6 +141,7 @@ const AVCodecTag ff_codec_movvideo_tags[] = {
{ AV_CODEC_ID_8BPS, MKTAG('8', 'B', 'P', 'S') }, /* Planar RGB (8BPS) */
{ AV_CODEC_ID_SMC, MKTAG('s', 'm', 'c', ' ') }, /* Apple Graphics (SMC) */
{ AV_CODEC_ID_QTRLE, MKTAG('r', 'l', 'e', ' ') }, /* Apple Animation (RLE) */
{ AV_CODEC_ID_SGIRLE, MKTAG('r', 'l', 'e', '1') }, /* SGI RLE 8-bit */
{ AV_CODEC_ID_MSRLE, MKTAG('W', 'R', 'L', 'E') },
{ AV_CODEC_ID_QDRAW, MKTAG('q', 'd', 'r', 'w') }, /* QuickDraw */