[FFmpeg-cvslog] Ut Video decoder
Kostya Shishkov
git at videolan.org
Thu Oct 20 02:37:09 CEST 2011
ffmpeg | branch: master | Kostya Shishkov <kostya.shishkov at gmail.com> | Sun Oct 16 17:20:17 2011 +0200| [0d8506b8c52659c5bfff9535391d5e95ddcd45f1] | committer: Anton Khirnov
Ut Video decoder
Signed-off-by: Anton Khirnov <anton at khirnov.net>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=0d8506b8c52659c5bfff9535391d5e95ddcd45f1
---
Changelog | 1 +
doc/general.texi | 1 +
libavcodec/Makefile | 1 +
libavcodec/allcodecs.c | 1 +
libavcodec/avcodec.h | 1 +
libavcodec/utvideo.c | 460 ++++++++++++++++++++++++++++++++++++++++++++++++
libavcodec/version.h | 4 +-
libavformat/riff.c | 4 +
8 files changed, 471 insertions(+), 2 deletions(-)
diff --git a/Changelog b/Changelog
index a70a3db..f61d3e2 100644
--- a/Changelog
+++ b/Changelog
@@ -52,6 +52,7 @@ easier to use. The changes are:
- VC-1 interlaced decoding
- lut, lutrgb, and lutyuv filters
- boxblur filter
+- Ut Video decoder
version 0.7:
diff --git a/doc/general.texi b/doc/general.texi
index 2c463cb..c4c4414 100644
--- a/doc/general.texi
+++ b/doc/general.texi
@@ -516,6 +516,7 @@ following image formats are supported:
@tab encoding supported through external library libtheora
@item Tiertex Limited SEQ video @tab @tab X
@tab Codec used in DOS CD-ROM FlashBack game.
+ at item Ut Video @tab @tab X
@item V210 Quicktime Uncompressed 4:2:2 10-bit @tab X @tab X
@item VMware Screen Codec / VMware Video @tab @tab X
@tab Codec used in videos captured by VMware.
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 4c3eca3..a566df2 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -378,6 +378,7 @@ OBJS-$(CONFIG_TTA_DECODER) += tta.o
OBJS-$(CONFIG_TWINVQ_DECODER) += twinvq.o celp_math.o
OBJS-$(CONFIG_TXD_DECODER) += txd.o s3tc.o
OBJS-$(CONFIG_ULTI_DECODER) += ulti.o
+OBJS-$(CONFIG_UTVIDEO_DECODER) += utvideo.o
OBJS-$(CONFIG_V210_DECODER) += v210dec.o
OBJS-$(CONFIG_V210_ENCODER) += v210enc.o
OBJS-$(CONFIG_V210X_DECODER) += v210x.o
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index fdb0a9c..f85f06d 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -199,6 +199,7 @@ void avcodec_register_all(void)
REGISTER_DECODER (TSCC, tscc);
REGISTER_DECODER (TXD, txd);
REGISTER_DECODER (ULTI, ulti);
+ REGISTER_DECODER (UTVIDEO, utvideo);
REGISTER_ENCDEC (V210, v210);
REGISTER_DECODER (V210X, v210x);
REGISTER_DECODER (VB, vb);
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 440ba9b..a8086c6 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -212,6 +212,7 @@ enum CodecID {
CODEC_ID_VC1IMAGE,
CODEC_ID_G723_1,
CODEC_ID_G729,
+ CODEC_ID_UTVIDEO,
/* various PCM "codecs" */
CODEC_ID_FIRST_AUDIO = 0x10000, ///< A dummy id pointing at the start of audio codecs
diff --git a/libavcodec/utvideo.c b/libavcodec/utvideo.c
new file mode 100644
index 0000000..aac3969
--- /dev/null
+++ b/libavcodec/utvideo.c
@@ -0,0 +1,460 @@
+/*
+ * Ut Video decoder
+ * Copyright (c) 2011 Konstantin Shishkov
+ *
+ * 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
+ * Ut Video decoder
+ */
+
+#include <stdlib.h>
+
+#include "libavutil/intreadwrite.h"
+#include "avcodec.h"
+#include "bytestream.h"
+#include "get_bits.h"
+#include "dsputil.h"
+
+enum {
+ PRED_NONE = 0,
+ PRED_LEFT,
+ PRED_GRADIENT,
+ PRED_MEDIAN,
+};
+
+typedef struct UtvideoContext {
+ AVCodecContext *avctx;
+ AVFrame pic;
+ DSPContext dsp;
+
+ uint32_t frame_info_size, flags, frame_info;
+ int planes;
+ int slices;
+ int compression;
+ int interlaced;
+ int frame_pred;
+
+ uint8_t *slice_bits;
+ int slice_bits_size;
+} UtvideoContext;
+
+typedef struct HuffEntry {
+ uint8_t sym;
+ uint8_t len;
+} HuffEntry;
+
+static int huff_cmp(const void *a, const void *b)
+{
+ const HuffEntry *aa = a, *bb = b;
+ return (aa->len - bb->len)*256 + aa->sym - bb->sym;
+}
+
+static int build_huff(const uint8_t *src, VLC *vlc)
+{
+ int i;
+ HuffEntry he[256];
+ int last;
+ uint32_t codes[256];
+ uint8_t bits[256];
+ uint8_t syms[256];
+ uint32_t code;
+
+ for (i = 0; i < 256; i++) {
+ he[i].sym = i;
+ he[i].len = *src++;
+ }
+ qsort(he, 256, sizeof(*he), huff_cmp);
+
+ if (!he[0].len || he[0].len > 32)
+ return -1;
+
+ last = 255;
+ while (he[last].len == 255 && last)
+ last--;
+
+ code = 1;
+ for (i = last; i >= 0; i--) {
+ codes[i] = code >> (32 - he[i].len);
+ bits[i] = he[i].len;
+ syms[i] = he[i].sym;
+ code += 0x80000000u >> (he[i].len - 1);
+ }
+
+ return init_vlc_sparse(vlc, FFMIN(he[last].len, 9), last + 1,
+ bits, sizeof(*bits), sizeof(*bits),
+ codes, sizeof(*codes), sizeof(*codes),
+ syms, sizeof(*syms), sizeof(*syms), 0);
+}
+
+static int decode_plane(UtvideoContext *c, int plane_no,
+ uint8_t *dst, int step, int stride,
+ int width, int height,
+ const uint8_t *src, int src_size, int use_pred)
+{
+ int i, j, slice, pix;
+ int sstart, send;
+ VLC vlc;
+ GetBitContext gb;
+ int prev;
+
+ if (build_huff(src, &vlc)) {
+ av_log(c->avctx, AV_LOG_ERROR, "Cannot build Huffman codes\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ src += 256;
+ src_size -= 256;
+
+ send = 0;
+ for (slice = 0; slice < c->slices; slice++) {
+ uint8_t *dest;
+ int slice_data_start, slice_data_end, slice_size;
+
+ sstart = send;
+ send = height * (slice + 1) / c->slices;
+ dest = dst + sstart * stride;
+
+ // slice offset and size validation was done earlier
+ slice_data_start = slice ? AV_RL32(src + slice * 4 - 4) : 0;
+ slice_data_end = AV_RL32(src + slice * 4);
+ slice_size = slice_data_end - slice_data_start;
+
+ if (!slice_size) {
+ for (j = sstart; j < send; j++) {
+ for (i = 0; i < width * step; i += step)
+ dest[i] = 0x80;
+ dest += stride;
+ }
+ continue;
+ }
+
+ memcpy(c->slice_bits, src + slice_data_start + c->slices * 4, slice_size);
+ memset(c->slice_bits + slice_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
+ c->dsp.bswap_buf((uint32_t*)c->slice_bits, (uint32_t*)c->slice_bits,
+ (slice_data_end - slice_data_start + 3) >> 2);
+ init_get_bits(&gb, c->slice_bits, slice_size * 8);
+
+ prev = 0x80;
+ for (j = sstart; j < send; j++) {
+ for (i = 0; i < width * step; i += step) {
+ if (get_bits_left(&gb) <= 0) {
+ av_log(c->avctx, AV_LOG_ERROR, "Slice decoding ran out of bits\n");
+ goto fail;
+ }
+ pix = get_vlc2(&gb, vlc.table, vlc.bits, 4);
+ if (pix < 0) {
+ av_log(c->avctx, AV_LOG_ERROR, "Decoding error\n");
+ goto fail;
+ }
+ if (use_pred) {
+ prev += pix;
+ pix = prev;
+ }
+ dest[i] = pix;
+ }
+ dest += stride;
+ }
+ if (get_bits_left(&gb) > 32)
+ av_log(c->avctx, AV_LOG_WARNING, "%d bits left after decoding slice\n",
+ get_bits_left(&gb));
+ }
+
+ free_vlc(&vlc);
+
+ return 0;
+fail:
+ free_vlc(&vlc);
+ return AVERROR_INVALIDDATA;
+}
+
+static const int rgb_order[4] = { 1, 2, 0, 3 };
+
+static void restore_rgb_planes(uint8_t *src, int step, int stride, int width, int height)
+{
+ int i, j;
+ uint8_t r, g, b;
+
+ for (j = 0; j < height; j++) {
+ for (i = 0; i < width * step; i += step) {
+ r = src[i];
+ g = src[i + 1];
+ b = src[i + 2];
+ src[i] = r + g - 0x80;
+ src[i + 2] = b + g - 0x80;
+ }
+ src += stride;
+ }
+}
+
+static void restore_median(uint8_t *src, int step, int stride,
+ int width, int height, int slices)
+{
+ int i, j, slice;
+ int A, B, C;
+ uint8_t *bsrc;
+ int slice_start, slice_height;
+
+ for (slice = 0; slice < slices; slice++) {
+ slice_start = (slice * height) / slices;
+ slice_height = ((slice + 1) * height) / slices - slice_start;
+
+ bsrc = src + slice_start * stride;
+
+ // first line - left neighbour prediction
+ bsrc[0] += 0x80;
+ A = bsrc[0];
+ for (i = step; i < width * step; i += step) {
+ bsrc[i] += A;
+ A = bsrc[i];
+ }
+ bsrc += stride;
+ if (slice_height == 1)
+ continue;
+ // second line - first element has top predition, the rest uses median
+ C = bsrc[-stride];
+ bsrc[0] += C;
+ A = bsrc[0];
+ for (i = step; i < width * step; i += step) {
+ B = bsrc[i - stride];
+ bsrc[i] += mid_pred(A, B, (uint8_t)(A + B - C));
+ C = B;
+ A = bsrc[i];
+ }
+ bsrc += stride;
+ // the rest of lines use continuous median prediction
+ for (j = 2; j < slice_height; j++) {
+ for (i = 0; i < width * step; i += step) {
+ B = bsrc[i - stride];
+ bsrc[i] += mid_pred(A, B, (uint8_t)(A + B - C));
+ C = B;
+ A = bsrc[i];
+ }
+ bsrc += stride;
+ }
+ }
+}
+
+static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
+{
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
+ const uint8_t *buf_end = buf + buf_size;
+ UtvideoContext *c = avctx->priv_data;
+ const uint8_t *ptr;
+ int i, j;
+ const uint8_t *plane_start[5];
+ int plane_size, max_slice_size = 0, slice_start, slice_end, slice_size;
+ int ret;
+
+ if (c->pic.data[0])
+ avctx->release_buffer(avctx, &c->pic);
+
+ c->pic.reference = 1;
+ c->pic.buffer_hints = FF_BUFFER_HINTS_VALID;
+ if ((ret = avctx->get_buffer(avctx, &c->pic)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ return ret;
+ }
+
+ /* parse plane structure to retrieve frame flags and validate slice offsets */
+ ptr = buf;
+ for (i = 0; i < c->planes; i++) {
+ plane_start[i] = ptr;
+ if (buf_end - ptr < 256 + 4 * c->slices) {
+ av_log(avctx, AV_LOG_ERROR, "Insufficient data for a plane\n");
+ return AVERROR_INVALIDDATA;
+ }
+ ptr += 256;
+ slice_start = 0;
+ slice_end = 0;
+ for (j = 0; j < c->slices; j++) {
+ slice_end = bytestream_get_le32(&ptr);
+ slice_size = slice_end - slice_start;
+ if (slice_size < 0) {
+ av_log(avctx, AV_LOG_ERROR, "Incorrect slice size\n");
+ return AVERROR_INVALIDDATA;
+ }
+ slice_start = slice_end;
+ max_slice_size = FFMAX(max_slice_size, slice_size);
+ }
+ plane_size = slice_end;
+ if (buf_end - ptr < plane_size) {
+ av_log(avctx, AV_LOG_ERROR, "Plane size is bigger than available data\n");
+ return AVERROR_INVALIDDATA;
+ }
+ ptr += plane_size;
+ }
+ plane_start[c->planes] = ptr;
+ if (buf_end - ptr < c->frame_info_size) {
+ av_log(avctx, AV_LOG_ERROR, "Not enough data for frame information\n");
+ return AVERROR_INVALIDDATA;
+ }
+ c->frame_info = AV_RL32(ptr);
+ av_log(avctx, AV_LOG_DEBUG, "frame information flags %X\n", c->frame_info);
+
+ c->frame_pred = (c->frame_info >> 8) & 3;
+
+ if (c->frame_pred == PRED_GRADIENT) {
+ av_log_ask_for_sample(avctx, "Frame uses gradient prediction\n");
+ return AVERROR_PATCHWELCOME;
+ }
+
+ av_fast_malloc(&c->slice_bits, &c->slice_bits_size,
+ max_slice_size + FF_INPUT_BUFFER_PADDING_SIZE);
+
+ if (!c->slice_bits) {
+ av_log(avctx, AV_LOG_ERROR, "Cannot allocate temporary buffer\n");
+ return AVERROR(ENOMEM);
+ }
+
+ switch (c->avctx->pix_fmt) {
+ case PIX_FMT_RGB24:
+ case PIX_FMT_RGBA:
+ for (i = 0; i < c->planes; i++) {
+ ret = decode_plane(c, i, c->pic.data[0] + rgb_order[i], c->planes,
+ c->pic.linesize[0], avctx->width, avctx->height,
+ plane_start[i], plane_start[i + 1] - plane_start[i],
+ c->frame_pred == PRED_LEFT);
+ if (ret)
+ return ret;
+ if (c->frame_pred == PRED_MEDIAN)
+ restore_median(c->pic.data[0] + rgb_order[i], c->planes,
+ c->pic.linesize[0], avctx->width, avctx->height,
+ c->slices);
+ }
+ restore_rgb_planes(c->pic.data[0], c->planes, c->pic.linesize[0],
+ avctx->width, avctx->height);
+ break;
+ case PIX_FMT_YUV420P:
+ for (i = 0; i < 3; i++) {
+ ret = decode_plane(c, i, c->pic.data[i], 1,
+ c->pic.linesize[i], avctx->width >> !!i, avctx->height >> !!i,
+ plane_start[i], plane_start[i + 1] - plane_start[i],
+ c->frame_pred == PRED_LEFT);
+ if (ret)
+ return ret;
+ if (c->frame_pred == PRED_MEDIAN)
+ restore_median(c->pic.data[i], 1, c->pic.linesize[i],
+ avctx->width >> !!i, avctx->height >> !!i,
+ c->slices);
+ }
+ break;
+ case PIX_FMT_YUV422P:
+ for (i = 0; i < 3; i++) {
+ ret = decode_plane(c, i, c->pic.data[i], 1,
+ c->pic.linesize[i], avctx->width >> !!i, avctx->height,
+ plane_start[i], plane_start[i + 1] - plane_start[i],
+ c->frame_pred == PRED_LEFT);
+ if (ret)
+ return ret;
+ if (c->frame_pred == PRED_MEDIAN)
+ restore_median(c->pic.data[i], 1, c->pic.linesize[i],
+ avctx->width >> !!i, avctx->height, c->slices);
+ }
+ break;
+ }
+
+ *data_size = sizeof(AVFrame);
+ *(AVFrame*)data = c->pic;
+
+ /* always report that the buffer was completely consumed */
+ return buf_size;
+}
+
+static av_cold int decode_init(AVCodecContext *avctx)
+{
+ UtvideoContext * const c = avctx->priv_data;
+
+ c->avctx = avctx;
+
+ dsputil_init(&c->dsp, avctx);
+
+ if (avctx->extradata_size < 16) {
+ av_log(avctx, AV_LOG_ERROR, "Insufficient extradata size %d, should be at least 16\n",
+ avctx->extradata_size);
+ return AVERROR_INVALIDDATA;
+ }
+
+ av_log(avctx, AV_LOG_DEBUG, "Encoder version %d.%d.%d.%d\n",
+ avctx->extradata[3], avctx->extradata[2],
+ avctx->extradata[1], avctx->extradata[0]);
+ av_log(avctx, AV_LOG_DEBUG, "Original format %X\n", AV_RB32(avctx->extradata + 4));
+ c->frame_info_size = AV_RL32(avctx->extradata + 8);
+ c->flags = AV_RL32(avctx->extradata + 12);
+
+ if (c->frame_info_size != 4)
+ av_log_ask_for_sample(avctx, "Frame info is not 4 bytes\n");
+ av_log(avctx, AV_LOG_DEBUG, "Encoding parameters %08X\n", c->flags);
+ c->slices = (c->flags >> 24) + 1;
+ c->compression = c->flags & 1;
+ c->interlaced = c->flags & 0x800;
+
+ c->slice_bits_size = 0;
+
+ switch (avctx->codec_tag) {
+ case MKTAG('U', 'L', 'R', 'G'):
+ c->planes = 3;
+ avctx->pix_fmt = PIX_FMT_RGB24;
+ break;
+ case MKTAG('U', 'L', 'R', 'A'):
+ c->planes = 4;
+ avctx->pix_fmt = PIX_FMT_RGBA;
+ break;
+ case MKTAG('U', 'L', 'Y', '0'):
+ c->planes = 3;
+ avctx->pix_fmt = PIX_FMT_YUV420P;
+ break;
+ case MKTAG('U', 'L', 'Y', '2'):
+ c->planes = 3;
+ avctx->pix_fmt = PIX_FMT_YUV422P;
+ break;
+ default:
+ av_log(avctx, AV_LOG_ERROR, "Unknown Ut Video FOURCC provided (%08X)\n",
+ avctx->codec_tag);
+ return AVERROR_INVALIDDATA;
+ }
+
+ return 0;
+}
+
+static av_cold int decode_end(AVCodecContext *avctx)
+{
+ UtvideoContext * const c = avctx->priv_data;
+
+ if (c->pic.data[0])
+ avctx->release_buffer(avctx, &c->pic);
+
+ av_freep(&c->slice_bits);
+
+ return 0;
+}
+
+AVCodec ff_utvideo_decoder = {
+ .name = "utvideo",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = CODEC_ID_UTVIDEO,
+ .priv_data_size = sizeof(UtvideoContext),
+ .init = decode_init,
+ .close = decode_end,
+ .decode = decode_frame,
+ .capabilities = CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("Ut Video"),
+};
+
diff --git a/libavcodec/version.h b/libavcodec/version.h
index ee647be..b89e6f1 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -21,8 +21,8 @@
#define AVCODEC_VERSION_H
#define LIBAVCODEC_VERSION_MAJOR 53
-#define LIBAVCODEC_VERSION_MINOR 12
-#define LIBAVCODEC_VERSION_MICRO 2
+#define LIBAVCODEC_VERSION_MINOR 13
+#define LIBAVCODEC_VERSION_MICRO 0
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
LIBAVCODEC_VERSION_MINOR, \
diff --git a/libavformat/riff.c b/libavformat/riff.c
index 8587806..0f4c079 100644
--- a/libavformat/riff.c
+++ b/libavformat/riff.c
@@ -275,6 +275,10 @@ const AVCodecTag ff_codec_bmp_tags[] = {
{ CODEC_ID_DPX, MKTAG('d', 'p', 'x', ' ') },
{ CODEC_ID_KGV1, MKTAG('K', 'G', 'V', '1') },
{ CODEC_ID_LAGARITH, MKTAG('L', 'A', 'G', 'S') },
+ { CODEC_ID_UTVIDEO, MKTAG('U', 'L', 'R', 'A') },
+ { 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_NONE, 0 }
};
More information about the ffmpeg-cvslog
mailing list