Signed-off-by: Vittorio Giovara <[email protected]>
---
Changelog | 1 +
configure | 1 +
doc/general.texi | 1 +
libavcodec/Makefile | 1 +
libavcodec/allcodecs.c | 1 +
libavcodec/avcodec.h | 1 +
libavcodec/codec_desc.c | 7 ++
libavcodec/screenpresso.c | 183 ++++++++++++++++++++++++++++++++++++++++++++++
libavcodec/version.h | 2 +-
libavformat/riff.c | 1 +
10 files changed, 198 insertions(+), 1 deletion(-)
create mode 100644 libavcodec/screenpresso.c
diff --git a/Changelog b/Changelog
index 461c5b1..696c881 100644
--- a/Changelog
+++ b/Changelog
@@ -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:
diff --git a/configure b/configure
index 852b931..ba827f9 100755
--- a/configure
+++ b/configure
@@ -1962,6 +1962,7 @@ 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"
diff --git a/doc/general.texi b/doc/general.texi
index 7cd7693..6e43269 100644
--- a/doc/general.texi
+++ b/doc/general.texi
@@ -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.
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index f163a79..632a8a6 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -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
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index 49f5a70..2d8474a 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -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);
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 8c635d7..de59320 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -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
diff --git a/libavcodec/codec_desc.c b/libavcodec/codec_desc.c
index c1be40b..d28fe9a 100644
--- a/libavcodec/codec_desc.c
+++ b/libavcodec/codec_desc.c
@@ -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 */
{
diff --git a/libavcodec/screenpresso.c b/libavcodec/screenpresso.c
new file mode 100644
index 0000000..b2d8338
--- /dev/null
+++ b/libavcodec/screenpresso.c
@@ -0,0 +1,183 @@
+/*
+ * Screenpresso decoder
+ * Copyright (C) 2015 Vittorio Giovara <[email protected]>
+ *
+ * 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 (from the currently rebuilt frame).
+ * No coordinate system (or any meaningful header), so a full frame is
+ * sent every time, with black for delta frames instead of pixel data.
+ *
+ * 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 *deflatebuffer;
+ uLongf deflatelen;
+} ScreenpressoContext;
+
+static av_cold int screenpresso_close(AVCodecContext *avctx)
+{
+ ScreenpressoContext *ctx = avctx->priv_data;
+
+ av_frame_free(&ctx->current);
+ av_freep(&ctx->deflatebuffer);
+
+ 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 copy_plane_flipped(uint8_t *dst, int dst_linesize,
+ const uint8_t *src, int src_linesize,
+ int bytewidth, int height)
+{
+ for (; height > 0; height--) {
+ memcpy(dst, src + (height - 1) * src_linesize, bytewidth);
+ dst += dst_linesize;
+ }
+}
+
+static void copy_delta_flipped(uint8_t *dst, int dst_linesize,
+ const uint8_t *src, int src_linesize,
+ int bytewidth, int height)
+{
+ int i, j;
+ for (i = 0; i < height; i++) {
+ for (j = 0; j < bytewidth; j++)
+ dst[j] += src[(height - 1 - i) * src_linesize + j];
+ 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 = (avpkt->data[0] == 0x73);
+ int ret;
+
+ /* 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]);
+ }
+
+ /* Resize deflate buffer and frame on resolution change */
+ if (ctx->deflatelen != avctx->width * avctx->height * 3) {
+ ret = ff_get_buffer(avctx, ctx->current, 0);
+ if (ret < 0)
+ return ret;
+
+ ctx->deflatelen = avctx->width * avctx->height * 3;
+ ret = av_reallocp(&ctx->deflatebuffer, ctx->deflatelen);
+ if (ret < 0)
+ return ret;
+ }
+
+ /* Skip the 2 byte header, and then inflate the frame */
+ ret = uncompress(ctx->deflatebuffer, &ctx->deflatelen,
+ 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 sent, copy it as it contains the whole picture */
+ if (keyframe)
+ copy_plane_flipped(ctx->current->data[0], ctx->current->linesize[0],
+ ctx->deflatebuffer, avctx->width * 3,
+ avctx->width * 3, avctx->height);
+ /* Otherwise sum the delta on top of the current frame */
+ else
+ copy_delta_flipped(ctx->current->data[0], ctx->current->linesize[0],
+ ctx->deflatebuffer, 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,
+};
diff --git a/libavcodec/version.h b/libavcodec/version.h
index ecd6e1d..5997f31 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -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, \
diff --git a/libavformat/riff.c b/libavformat/riff.c
index 9093b3a..74e8338 100644
--- a/libavformat/riff.c
+++ b/libavformat/riff.c
@@ -359,6 +359,7 @@ const AVCodecTag ff_codec_bmp_tags[] = {
{ AV_CODEC_ID_HQX, MKTAG('C', 'H', 'Q', 'X') },
{ AV_CODEC_ID_TDSC, MKTAG('T', 'D', 'S', 'C') },
{ AV_CODEC_ID_HQ_HQA, MKTAG('C', 'U', 'V', 'C') },
+ { AV_CODEC_ID_SCREENPRESSO, MKTAG('S', 'P', 'V', '1') },
{ AV_CODEC_ID_NONE, 0 }
};
--
1.9.5 (Apple Git-50.3)
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