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Screenpresso SPV1 decoder

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Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
This commit is contained in:
Vittorio Giovara 2015-09-25 00:36:50 +02:00
parent 1aa24df74c
commit 9a3202a98b
12 changed files with 209 additions and 1 deletions
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1
Changelog
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@ -43,6 +43,7 @@ version <next>:
- Intel QSV-accelerated MPEG-2 video and HEVC decoding
- Support DNx100 (1440x1080@8)
- DXV decoding
- Screenpresso SPV1 decoding
version 11:

1
configure vendored
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@ -1972,6 +1972,7 @@ rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
rv20_encoder_select="h263_encoder"
rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
screenpresso_decoder_deps="zlib"
shorten_decoder_select="golomb"
sipr_decoder_select="lsp"
sp5x_decoder_select="mjpeg_decoder"

1
doc/general.texi
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@ -409,6 +409,7 @@ library:
@item RTP @tab X @tab X
@item RTSP @tab X @tab X
@item SAP @tab X @tab X
@item Screenpresso @tab @tab X
@item SDP @tab @tab X
@item Sega FILM/CPK @tab @tab X
@tab Used in many Sega Saturn console games.

1
libavcodec/Makefile
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@ -385,6 +385,7 @@ OBJS-$(CONFIG_RV30_DECODER) += rv30.o rv34.o rv30dsp.o
OBJS-$(CONFIG_RV40_DECODER) += rv40.o rv34.o rv40dsp.o
OBJS-$(CONFIG_S302M_DECODER) += s302m.o
OBJS-$(CONFIG_SANM_DECODER) += sanm.o
OBJS-$(CONFIG_SCREENPRESSO_DECODER) += screenpresso.o
OBJS-$(CONFIG_SGI_DECODER) += sgidec.o
OBJS-$(CONFIG_SGI_ENCODER) += sgienc.o rle.o
OBJS-$(CONFIG_SGIRLE_DECODER) += sgirledec.o

1
libavcodec/allcodecs.c
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@ -249,6 +249,7 @@ void avcodec_register_all(void)
REGISTER_DECODER(RV40, rv40);
REGISTER_DECODER(S302M, s302m);
REGISTER_DECODER(SANM, sanm);
REGISTER_DECODER(SCREENPRESSO, screenpresso);
REGISTER_ENCDEC (SGI, sgi);
REGISTER_DECODER(SGIRLE, sgirle);
REGISTER_DECODER(SMACKER, smacker);

1
libavcodec/avcodec.h
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@ -299,6 +299,7 @@ enum AVCodecID {
AV_CODEC_ID_HAP,
AV_CODEC_ID_DDS,
AV_CODEC_ID_DXV,
AV_CODEC_ID_SCREENPRESSO,
/* various PCM "codecs" */
AV_CODEC_ID_FIRST_AUDIO = 0x10000, ///< A dummy id pointing at the start of audio codecs

7
libavcodec/codec_desc.c
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@ -1162,6 +1162,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
.long_name = NULL_IF_CONFIG_SMALL("Resolume DXV"),
.props = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSY,
},
{
.id = AV_CODEC_ID_SCREENPRESSO,
.type = AVMEDIA_TYPE_VIDEO,
.name = "screenpresso",
.long_name = NULL_IF_CONFIG_SMALL("Screenpresso"),
.props = AV_CODEC_PROP_LOSSLESS,
},
/* image codecs */
{

186
libavcodec/screenpresso.c Normal file
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@ -0,0 +1,186 @@
/*
* Screenpresso decoder
* Copyright (C) 2015 Vittorio Giovara <vittorio.giovara@gmail.com>
*
* 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
* Screenpresso decoder
*
* Fourcc: SPV1
*
* Screenpresso simply horizontally flips and then deflates frames,
* alternating full pictures and deltas. Deltas are related to the currently
* rebuilt frame (not the reference), and since there is no coordinate system
* they contain exactly as many pixel as the keyframe.
*
* Supports: BGR24
*/
#include <stdint.h>
#include <string.h>
#include <zlib.h>
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "avcodec.h"
#include "internal.h"
typedef struct ScreenpressoContext {
AVFrame *current;
/* zlib interation */
uint8_t *inflated_buf;
uLongf inflated_size;
} ScreenpressoContext;
static av_cold int screenpresso_close(AVCodecContext *avctx)
{
ScreenpressoContext *ctx = avctx->priv_data;
av_frame_free(&ctx->current);
av_freep(&ctx->inflated_buf);
return 0;
}
static av_cold int screenpresso_init(AVCodecContext *avctx)
{
ScreenpressoContext *ctx = avctx->priv_data;
/* These needs to be set to estimate uncompressed buffer */
int ret = av_image_check_size(avctx->width, avctx->height, 0, avctx);
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR, "Invalid image size %dx%d.\n",
avctx->width, avctx->height);
return ret;
}
/* Allocate current frame */
ctx->current = av_frame_alloc();
if (!ctx->current)
return AVERROR(ENOMEM);
avctx->pix_fmt = AV_PIX_FMT_BGR24;
return 0;
}
static void sum_delta_flipped(uint8_t *dst, int dst_linesize,
const uint8_t *src, int src_linesize,
int bytewidth, int height)
{
int i;
for (; height > 0; height--) {
for (i = 0; i < bytewidth; i++)
dst[i] += src[(height - 1) * src_linesize + i];
dst += dst_linesize;
}
}
static int screenpresso_decode_frame(AVCodecContext *avctx, void *data,
int *got_frame, AVPacket *avpkt)
{
ScreenpressoContext *ctx = avctx->priv_data;
AVFrame *frame = data;
int keyframe;
int ret;
/* Size check */
if (avpkt->size < 3) {
av_log(avctx, AV_LOG_ERROR, "Packet too small (%d)\n", avpkt->size);
return AVERROR_INVALIDDATA;
}
/* Basic sanity check, but not really harmful */
if ((avpkt->data[0] != 0x73 && avpkt->data[0] != 0x72) ||
avpkt->data[1] != 8) { // bpp probably
av_log(avctx, AV_LOG_WARNING, "Unknown header 0x%02X%02X\n",
avpkt->data[0], avpkt->data[1]);
}
keyframe = (avpkt->data[0] == 0x73);
/* Resize deflate buffer and frame on resolution change */
if (ctx->inflated_size != avctx->width * avctx->height * 3) {
av_frame_unref(ctx->current);
ret = ff_get_buffer(avctx, ctx->current, AV_GET_BUFFER_FLAG_REF);
if (ret < 0)
return ret;
/* If malloc fails, reset len to avoid preserving an invalid value */
ctx->inflated_size = avctx->width * avctx->height * 3;
ret = av_reallocp(&ctx->inflated_buf, ctx->inflated_size);
if (ret < 0) {
ctx->inflated_size = 0;
return ret;
}
}
/* Inflate the frame after the 2 byte header */
ret = uncompress(ctx->inflated_buf, &ctx->inflated_size,
avpkt->data + 2, avpkt->size - 2);
if (ret) {
av_log(avctx, AV_LOG_ERROR, "Deflate error %d.\n", ret);
return AVERROR_UNKNOWN;
}
/* When a keyframe is found, copy it (flipped) */
if (keyframe)
av_image_copy_plane(ctx->current->data[0] +
ctx->current->linesize[0] * (avctx->height - 1),
-1 * ctx->current->linesize[0],
ctx->inflated_buf, avctx->width * 3,
avctx->width * 3, avctx->height);
/* Otherwise sum the delta on top of the current frame */
else
sum_delta_flipped(ctx->current->data[0], ctx->current->linesize[0],
ctx->inflated_buf, avctx->width * 3,
avctx->width * 3, avctx->height);
/* Frame is ready to be output */
ret = av_frame_ref(frame, ctx->current);
if (ret < 0)
return ret;
/* Usual properties */
if (keyframe) {
frame->pict_type = AV_PICTURE_TYPE_I;
frame->key_frame = 1;
} else {
frame->pict_type = AV_PICTURE_TYPE_P;
}
*got_frame = 1;
return 0;
}
AVCodec ff_screenpresso_decoder = {
.name = "screenpresso",
.long_name = NULL_IF_CONFIG_SMALL("Screenpresso"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_SCREENPRESSO,
.init = screenpresso_init,
.decode = screenpresso_decode_frame,
.close = screenpresso_close,
.priv_data_size = sizeof(ScreenpressoContext),
.capabilities = AV_CODEC_CAP_DR1,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
FF_CODEC_CAP_INIT_CLEANUP,
};

2
libavcodec/version.h
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@ -29,7 +29,7 @@
#include "libavutil/version.h"
#define LIBAVCODEC_VERSION_MAJOR 57
#define LIBAVCODEC_VERSION_MINOR 2
#define LIBAVCODEC_VERSION_MINOR 3
#define LIBAVCODEC_VERSION_MICRO 0
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \

1
libavformat/riff.c
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@ -360,6 +360,7 @@ const AVCodecTag ff_codec_bmp_tags[] = {
{ AV_CODEC_ID_TDSC, MKTAG('T', 'D', 'S', 'C') },
{ AV_CODEC_ID_HQ_HQA, MKTAG('C', 'U', 'V', 'C') },
{ AV_CODEC_ID_RV40, MKTAG('R', 'V', '4', '0') },
{ AV_CODEC_ID_SCREENPRESSO, MKTAG('S', 'P', 'V', '1') },
{ AV_CODEC_ID_NONE, 0 }
};

3
tests/fate/video.mak
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@ -275,6 +275,9 @@ fate-roqvideo: CMD = framecrc -i $(TARGET_SAMPLES)/idroq/idlogo.roq -an
FATE_SAMPLES_AVCONV-$(call DEMDEC, SMUSH, SANM) += fate-sanm
fate-sanm: CMD = framecrc -i $(TARGET_SAMPLES)/smush/ronin_part.znm -an -pix_fmt rgb24
FATE_SAMPLES_AVCONV-$(call DEMDEC, AVI, SCREENPRESSO) += fate-screenpresso
fate-screenpresso: CMD = framecrc -i $(TARGET_SAMPLES)/spv1/bunny.avi
FATE_SAMPLES_AVCONV-$(call DEMDEC, VMD, VMDVIDEO) += fate-sierra-vmd-video
fate-sierra-vmd-video: CMD = framecrc -i $(TARGET_SAMPLES)/vmd/12.vmd -pix_fmt rgb24 -an

5
tests/ref/fate/screenpresso Normal file
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@ -0,0 +1,5 @@
#tb 0: 1/15
0, 0, 0, 1, 691200, 0xfdbdfad6
0, 1, 1, 1, 691200, 0xc5feb961
0, 4, 4, 1, 691200, 0x4c8c7e23
0, 8, 8, 1, 691200, 0xd95c89f8