[FFmpeg-cvslog] avcodec: add ClearVideo decoder
Kostya Shishkov
git at videolan.org
Thu Mar 2 12:40:06 EET 2017
ffmpeg | branch: master | Kostya Shishkov <kostya.shishkov at gmail.com> | Thu Mar 2 11:21:48 2017 +0100| [a63496cc882428aefafc85d2f60e0908b020bffe] | committer: Paul B Mahol
avcodec: add ClearVideo decoder
Only I-frames are decoded for now.
Signed-off-by: Paul B Mahol <onemda at gmail.com>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=a63496cc882428aefafc85d2f60e0908b020bffe
---
Changelog | 1 +
doc/general.texi | 1 +
libavcodec/Makefile | 1 +
libavcodec/allcodecs.c | 1 +
libavcodec/avcodec.h | 1 +
libavcodec/clearvideo.c | 387 ++++++++++++++++++++++++++++++++++++++++++++++++
libavcodec/codec_desc.c | 7 +
libavcodec/version.h | 4 +-
libavformat/riff.c | 1 +
libavformat/rm.c | 1 +
10 files changed, 403 insertions(+), 2 deletions(-)
diff --git a/Changelog b/Changelog
index beb3486..13628ca 100644
--- a/Changelog
+++ b/Changelog
@@ -25,6 +25,7 @@ version <next>:
- FM Screen Capture Codec decoder
- native Opus encoder
- ScreenPressor decoder
+- incomplete ClearVideo decoder
version 3.2:
- libopenmpt demuxer
diff --git a/doc/general.texi b/doc/general.texi
index 626590c..30450c0 100644
--- a/doc/general.texi
+++ b/doc/general.texi
@@ -342,6 +342,7 @@ library:
@item iLBC @tab X @tab X
@item Interplay MVE @tab @tab X
@tab Format used in various Interplay computer games.
+ at item Iterated Systems ClearVideo @tab @tab X
@item IV8 @tab @tab X
@tab A format generated by IndigoVision 8000 video server.
@item IVF (On2) @tab X @tab X
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 1bea44a..65ccbad 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -228,6 +228,7 @@ OBJS-$(CONFIG_CDXL_DECODER) += cdxl.o
OBJS-$(CONFIG_CFHD_DECODER) += cfhd.o cfhddata.o
OBJS-$(CONFIG_CINEPAK_DECODER) += cinepak.o
OBJS-$(CONFIG_CINEPAK_ENCODER) += cinepakenc.o elbg.o
+OBJS-$(CONFIG_CLEARVIDEO_DECODER) += clearvideo.o
OBJS-$(CONFIG_CLJR_DECODER) += cljrdec.o
OBJS-$(CONFIG_CLJR_ENCODER) += cljrenc.o
OBJS-$(CONFIG_CLLC_DECODER) += cllc.o canopus.o
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index eee322b..a265ce5 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -157,6 +157,7 @@ void avcodec_register_all(void)
REGISTER_DECODER(CDXL, cdxl);
REGISTER_DECODER(CFHD, cfhd);
REGISTER_ENCDEC (CINEPAK, cinepak);
+ REGISTER_DECODER(CLEARVIDEO, clearvideo);
REGISTER_ENCDEC (CLJR, cljr);
REGISTER_DECODER(CLLC, cllc);
REGISTER_ENCDEC (COMFORTNOISE, comfortnoise);
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 298b914..af054f3 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -416,6 +416,7 @@ enum AVCodecID {
AV_CODEC_ID_SPEEDHQ,
AV_CODEC_ID_FMVC,
AV_CODEC_ID_SCPR,
+ AV_CODEC_ID_CLEARVIDEO,
/* various PCM "codecs" */
AV_CODEC_ID_FIRST_AUDIO = 0x10000, ///< A dummy id pointing at the start of audio codecs
diff --git a/libavcodec/clearvideo.c b/libavcodec/clearvideo.c
new file mode 100644
index 0000000..91f37e1
--- /dev/null
+++ b/libavcodec/clearvideo.c
@@ -0,0 +1,387 @@
+/*
+ * ClearVideo decoder
+ * Copyright (c) 2012 Konstantin Shishkov
+ *
+ * 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
+ * ClearVideo decoder
+ */
+
+#include "avcodec.h"
+#include "idctdsp.h"
+#include "internal.h"
+#include "get_bits.h"
+#include "bytestream.h"
+
+#define NUM_DC_CODES 127
+#define NUM_AC_CODES 103
+
+static const uint8_t clv_dc_codes[NUM_DC_CODES] = {
+ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
+ 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
+ 0x10, 0x11, 0x12, 0x13, 0x13, 0x14, 0x07, 0x0B,
+ 0x0C, 0x08, 0x08, 0x09, 0x04, 0x06, 0x07, 0x05,
+ 0x04, 0x05, 0x04, 0x06, 0x05, 0x06, 0x07, 0x05,
+ 0x06, 0x07, 0x06, 0x07, 0x08, 0x06, 0x07, 0x08,
+ 0x09, 0x0A, 0x0B, 0x07, 0x08, 0x09, 0x07, 0x08,
+ 0x06, 0x07, 0x08, 0x06, 0x04, 0x05, 0x02, 0x01,
+ 0x03, 0x06, 0x07, 0x07, 0x09, 0x0A, 0x0B, 0x09,
+ 0x0A, 0x0B, 0x0A, 0x0B, 0x0C, 0x0D, 0x0C, 0x09,
+ 0x0D, 0x0A, 0x0B, 0x08, 0x09, 0x0A, 0x0B, 0x07,
+ 0x08, 0x09, 0x0A, 0x0B, 0x06, 0x07, 0x06, 0x08,
+ 0x07, 0x09, 0x0A, 0x0B, 0x09, 0x0A, 0x0B, 0x0C,
+ 0x14, 0x0D, 0x0D, 0x0E, 0x0F, 0x15, 0x15, 0x16,
+ 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E,
+ 0x1F, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25,
+};
+
+static const uint8_t clv_dc_bits[NUM_DC_CODES] = {
+ 22, 22, 22, 22, 22, 22, 22, 22,
+ 22, 22, 22, 22, 22, 22, 22, 22,
+ 22, 22, 22, 21, 22, 22, 19, 20,
+ 20, 19, 18, 18, 15, 17, 17, 16,
+ 14, 15, 12, 13, 14, 14, 14, 12,
+ 12, 12, 11, 11, 11, 10, 10, 10,
+ 10, 10, 10, 9, 9, 9, 8, 8,
+ 7, 7, 7, 6, 5, 5, 3, 1,
+ 3, 5, 5, 6, 7, 7, 7, 8,
+ 8, 8, 9, 9, 9, 9, 10, 11,
+ 10, 11, 11, 12, 12, 12, 12, 13,
+ 14, 14, 14, 14, 15, 15, 16, 17,
+ 16, 17, 18, 18, 19, 19, 19, 19,
+ 21, 19, 20, 19, 19, 21, 22, 22,
+ 22, 22, 22, 22, 22, 22, 22, 22,
+ 22, 22, 22, 22, 22, 22, 22,
+};
+
+static const uint16_t clv_ac_syms[NUM_AC_CODES] = {
+ 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007, 0x0008,
+ 0x0009, 0x000A, 0x000B, 0x000C, 0x0011, 0x0012, 0x0013, 0x0014,
+ 0x0015, 0x0016, 0x0021, 0x0022, 0x0023, 0x0024, 0x0031, 0x0032,
+ 0x0033, 0x0041, 0x0042, 0x0043, 0x0051, 0x0052, 0x0053, 0x0061,
+ 0x0062, 0x0063, 0x0071, 0x0072, 0x0081, 0x0082, 0x0091, 0x0092,
+ 0x00A1, 0x00A2, 0x00B1, 0x00C1, 0x00D1, 0x00E1, 0x00F1, 0x0101,
+ 0x0111, 0x0121, 0x0131, 0x0141, 0x0151, 0x0161, 0x0171, 0x0181,
+ 0x0191, 0x01A1, 0x1001, 0x1002, 0x1003, 0x1011, 0x1012, 0x1021,
+ 0x1031, 0x1041, 0x1051, 0x1061, 0x1071, 0x1081, 0x1091, 0x10A1,
+ 0x10B1, 0x10C1, 0x10D1, 0x10E1, 0x10F1, 0x1101, 0x1111, 0x1121,
+ 0x1131, 0x1141, 0x1151, 0x1161, 0x1171, 0x1181, 0x1191, 0x11A1,
+ 0x11B1, 0x11C1, 0x11D1, 0x11E1, 0x11F1, 0x1201, 0x1211, 0x1221,
+ 0x1231, 0x1241, 0x1251, 0x1261, 0x1271, 0x1281, 0x1BFF,
+};
+
+static const uint8_t clv_ac_codes[NUM_AC_CODES] = {
+ 0x02, 0x0F, 0x15, 0x17, 0x1F, 0x25, 0x24, 0x21,
+ 0x20, 0x07, 0x06, 0x20, 0x06, 0x14, 0x1E, 0x0F,
+ 0x21, 0x50, 0x0E, 0x1D, 0x0E, 0x51, 0x0D, 0x23,
+ 0x0D, 0x0C, 0x22, 0x52, 0x0B, 0x0C, 0x53, 0x13,
+ 0x0B, 0x54, 0x12, 0x0A, 0x11, 0x09, 0x10, 0x08,
+ 0x16, 0x55, 0x15, 0x14, 0x1C, 0x1B, 0x21, 0x20,
+ 0x1F, 0x1E, 0x1D, 0x1C, 0x1B, 0x1A, 0x22, 0x23,
+ 0x56, 0x57, 0x07, 0x19, 0x05, 0x0F, 0x04, 0x0E,
+ 0x0D, 0x0C, 0x13, 0x12, 0x11, 0x10, 0x1A, 0x19,
+ 0x18, 0x17, 0x16, 0x15, 0x14, 0x13, 0x18, 0x17,
+ 0x16, 0x15, 0x14, 0x13, 0x12, 0x11, 0x07, 0x06,
+ 0x05, 0x04, 0x24, 0x25, 0x26, 0x27, 0x58, 0x59,
+ 0x5A, 0x5B, 0x5C, 0x5D, 0x5E, 0x5F, 0x03,
+};
+
+static const uint8_t clv_ac_bits[NUM_AC_CODES] = {
+ 2, 4, 6, 7, 8, 9, 9, 10,
+ 10, 11, 11, 11, 3, 6, 8, 10,
+ 11, 12, 4, 8, 10, 12, 5, 9,
+ 10, 5, 9, 12, 5, 10, 12, 6,
+ 10, 12, 6, 10, 6, 10, 6, 10,
+ 7, 12, 7, 7, 8, 8, 9, 9,
+ 9, 9, 9, 9, 9, 9, 11, 11,
+ 12, 12, 4, 9, 11, 6, 11, 6,
+ 6, 6, 7, 7, 7, 7, 8, 8,
+ 8, 8, 8, 8, 8, 8, 9, 9,
+ 9, 9, 9, 9, 9, 9, 10, 10,
+ 10, 10, 11, 11, 11, 11, 12, 12,
+ 12, 12, 12, 12, 12, 12, 7,
+};
+
+typedef struct CLVContext {
+ AVCodecContext *avctx;
+ IDCTDSPContext idsp;
+ AVFrame *pic;
+ GetBitContext gb;
+ int mb_width, mb_height;
+ VLC dc_vlc, ac_vlc;
+ int luma_dc_quant, chroma_dc_quant, ac_quant;
+ DECLARE_ALIGNED(16, int16_t, block)[64];
+ int top_dc[3], left_dc[4];
+} CLVContext;
+
+static inline int decode_block(CLVContext *ctx, int16_t *blk, int has_ac,
+ int ac_quant)
+{
+ GetBitContext *gb = &ctx->gb;
+ int idx = 1, last = 0, val, skip;
+
+ memset(blk, 0, sizeof(*blk) * 64);
+ blk[0] = get_vlc2(gb, ctx->dc_vlc.table, 9, 3);
+ if (blk[0] < 0)
+ return AVERROR_INVALIDDATA;
+ blk[0] -= 63;
+
+ if (!has_ac)
+ return 0;
+
+ while (idx < 64 && !last) {
+ val = get_vlc2(gb, ctx->ac_vlc.table, 9, 2);
+ if (val < 0)
+ return AVERROR_INVALIDDATA;
+ if (val != 0x1BFF) {
+ last = val >> 12;
+ skip = (val >> 4) & 0xFF;
+ val &= 0xF;
+ if (get_bits1(gb))
+ val = -val;
+ } else {
+ last = get_bits1(gb);
+ skip = get_bits(gb, 6);
+ val = get_sbits(gb, 8);
+ }
+ if (val) {
+ int aval = FFABS(val), sign = val < 0;
+ val = ac_quant * (2 * aval + 1);
+ if (!(ac_quant & 1))
+ val--;
+ if (sign)
+ val = -val;
+ }
+ idx += skip;
+ if (idx >= 64)
+ return AVERROR_INVALIDDATA;
+ blk[ff_zigzag_direct[idx++]] = val;
+ }
+
+ return (idx <= 64 && last) ? 0 : -1;
+}
+
+#define DCT_TEMPLATE(blk, step, bias, shift, dshift, OP) \
+ const int t0 = OP( 2841 * blk[1 * step] + 565 * blk[7 * step]); \
+ const int t1 = OP( 565 * blk[1 * step] - 2841 * blk[7 * step]); \
+ const int t2 = OP( 1609 * blk[5 * step] + 2408 * blk[3 * step]); \
+ const int t3 = OP( 2408 * blk[5 * step] - 1609 * blk[3 * step]); \
+ const int t4 = OP( 1108 * blk[2 * step] - 2676 * blk[6 * step]); \
+ const int t5 = OP( 2676 * blk[2 * step] + 1108 * blk[6 * step]); \
+ const int t6 = ((blk[0 * step] + blk[4 * step]) << dshift) + bias; \
+ const int t7 = ((blk[0 * step] - blk[4 * step]) << dshift) + bias; \
+ const int t8 = t0 + t2; \
+ const int t9 = t0 - t2; \
+ const int tA = 181 * (t9 + (t1 - t3)) + 0x80 >> 8; \
+ const int tB = 181 * (t9 - (t1 - t3)) + 0x80 >> 8; \
+ const int tC = t1 + t3; \
+ \
+ blk[0 * step] = (t6 + t5 + t8) >> shift; \
+ blk[1 * step] = (t7 + t4 + tA) >> shift; \
+ blk[2 * step] = (t7 - t4 + tB) >> shift; \
+ blk[3 * step] = (t6 - t5 + tC) >> shift; \
+ blk[4 * step] = (t6 - t5 - tC) >> shift; \
+ blk[5 * step] = (t7 - t4 - tB) >> shift; \
+ blk[6 * step] = (t7 + t4 - tA) >> shift; \
+ blk[7 * step] = (t6 + t5 - t8) >> shift; \
+
+#define ROP(x) x
+#define COP(x) (((x) + 4) >> 3)
+
+static void clv_dct(int16_t *block)
+{
+ int i;
+ int16_t *ptr;
+
+ ptr = block;
+ for (i = 0; i < 8; i++) {
+ DCT_TEMPLATE(ptr, 1, 0x80, 8, 11, ROP);
+ ptr += 8;
+ }
+
+ ptr = block;
+ for (i = 0; i < 8; i++) {
+ DCT_TEMPLATE(ptr, 8, 0x2000, 14, 8, COP);
+ ptr++;
+ }
+}
+
+static int decode_mb(CLVContext *c, int x, int y)
+{
+ int i;
+ int has_ac[6];
+ int off;
+
+ for (i = 0; i < 6; i++)
+ has_ac[i] = get_bits1(&c->gb);
+
+ off = x * 16 + y * 16 * c->pic->linesize[0];
+ for (i = 0; i < 4; i++) {
+ if (decode_block(c, c->block, has_ac[i], c->ac_quant) < 0)
+ return AVERROR_INVALIDDATA;
+ if (!x && !(i & 1)) {
+ c->block[0] += c->top_dc[0];
+ c->top_dc[0] = c->block[0];
+ } else {
+ c->block[0] += c->left_dc[(i & 2) >> 1];
+ }
+ c->left_dc[(i & 2) >> 1] = c->block[0];
+ c->block[0] *= c->luma_dc_quant;
+ clv_dct(c->block);
+ if (i == 2)
+ off += c->pic->linesize[0] * 8;
+ c->idsp.put_pixels_clamped(c->block, c->pic->data[0] + off + (i & 1) * 8,
+ c->pic->linesize[0]);
+ }
+
+ off = x * 8 + y * 8 * c->pic->linesize[1];
+ for (i = 1; i < 3; i++) {
+ if (decode_block(c, c->block, has_ac[i + 3], c->ac_quant) < 0)
+ return AVERROR_INVALIDDATA;
+ if (!x) {
+ c->block[0] += c->top_dc[i];
+ c->top_dc[i] = c->block[0];
+ } else {
+ c->block[0] += c->left_dc[i + 1];
+ }
+ c->left_dc[i + 1] = c->block[0];
+ c->block[0] *= c->chroma_dc_quant;
+ clv_dct(c->block);
+ c->idsp.put_pixels_clamped(c->block, c->pic->data[i] + off,
+ c->pic->linesize[i]);
+ }
+
+ return 0;
+}
+
+static int clv_decode_frame(AVCodecContext *avctx, void *data,
+ int *got_frame, AVPacket *avpkt)
+{
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
+ CLVContext *c = avctx->priv_data;
+ GetByteContext gb;
+ uint32_t frame_type;
+ int i, j;
+ int ret;
+
+ bytestream2_init(&gb, buf, buf_size);
+ if (avctx->codec_tag == MKTAG('C','L','V','1')) {
+ int skip = bytestream2_get_byte(&gb);
+ bytestream2_skip(&gb, (skip + 1) * 8);
+ }
+
+ frame_type = bytestream2_get_byte(&gb);
+ if ((ret = ff_reget_buffer(avctx, c->pic)) < 0)
+ return ret;
+
+ c->pic->key_frame = frame_type & 0x20 ? 1 : 0;
+ c->pic->pict_type = frame_type & 0x20 ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
+
+ if (frame_type & 0x2) {
+ bytestream2_get_be32(&gb); // frame size;
+ c->ac_quant = bytestream2_get_byte(&gb);
+ c->luma_dc_quant = 32;
+ c->chroma_dc_quant = 32;
+
+ if ((ret = init_get_bits8(&c->gb, buf + bytestream2_tell(&gb),
+ (buf_size - bytestream2_tell(&gb)))) < 0)
+ return ret;
+
+ for (i = 0; i < 3; i++)
+ c->top_dc[i] = 32;
+ for (i = 0; i < 4; i++)
+ c->left_dc[i] = 32;
+
+ for (j = 0; j < c->mb_height; j++) {
+ for (i = 0; i < c->mb_width; i++) {
+ ret |= decode_mb(c, i, j);
+ }
+ }
+ } else {
+ }
+
+ if ((ret = av_frame_ref(data, c->pic)) < 0)
+ return ret;
+
+ *got_frame = 1;
+
+ return ret < 0 ? ret : buf_size;
+}
+
+static av_cold int clv_decode_init(AVCodecContext *avctx)
+{
+ CLVContext * const c = avctx->priv_data;
+ int ret;
+
+ c->avctx = avctx;
+
+ avctx->pix_fmt = AV_PIX_FMT_YUV420P;
+
+ c->pic = av_frame_alloc();
+ if (!c->pic)
+ return AVERROR(ENOMEM);
+
+ c->mb_width = FFALIGN(avctx->width, 16) >> 4;
+ c->mb_height = FFALIGN(avctx->height, 16) >> 4;
+
+ ff_idctdsp_init(&c->idsp, avctx);
+ ret = init_vlc(&c->dc_vlc, 9, NUM_DC_CODES,
+ clv_dc_bits, 1, 1,
+ clv_dc_codes, 1, 1, 0);
+ if (ret) {
+ av_log(avctx, AV_LOG_ERROR, "Error initialising DC VLC\n");
+ return ret;
+ }
+ ret = ff_init_vlc_sparse(&c->ac_vlc, 9, NUM_AC_CODES,
+ clv_ac_bits, 1, 1,
+ clv_ac_codes, 1, 1,
+ clv_ac_syms, 2, 2, 0);
+ if (ret) {
+ av_log(avctx, AV_LOG_ERROR, "Error initialising AC VLC\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static av_cold int clv_decode_end(AVCodecContext *avctx)
+{
+ CLVContext * const c = avctx->priv_data;
+
+ av_frame_free(&c->pic);
+
+ ff_free_vlc(&c->dc_vlc);
+ ff_free_vlc(&c->ac_vlc);
+
+ return 0;
+}
+
+AVCodec ff_clearvideo_decoder = {
+ .name = "clearvideo",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_CLEARVIDEO,
+ .priv_data_size = sizeof(CLVContext),
+ .init = clv_decode_init,
+ .close = clv_decode_end,
+ .decode = clv_decode_frame,
+ .capabilities = CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("Iterated Systems ClearVideo"),
+};
diff --git a/libavcodec/codec_desc.c b/libavcodec/codec_desc.c
index 42935d7..06bcfc3 100644
--- a/libavcodec/codec_desc.c
+++ b/libavcodec/codec_desc.c
@@ -1367,6 +1367,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
.long_name = NULL_IF_CONFIG_SMALL("ScreenPressor"),
.props = AV_CODEC_PROP_LOSSLESS | AV_CODEC_PROP_LOSSY,
},
+ {
+ .id = AV_CODEC_ID_CLEARVIDEO,
+ .type = AVMEDIA_TYPE_VIDEO,
+ .name = "clearvideo",
+ .long_name = NULL_IF_CONFIG_SMALL("Iterated Systems ClearVideo"),
+ .props = AV_CODEC_PROP_LOSSY,
+ },
/* image codecs */
{
diff --git a/libavcodec/version.h b/libavcodec/version.h
index 5d8b22c..7647ad2 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -28,8 +28,8 @@
#include "libavutil/version.h"
#define LIBAVCODEC_VERSION_MAJOR 57
-#define LIBAVCODEC_VERSION_MINOR 81
-#define LIBAVCODEC_VERSION_MICRO 103
+#define LIBAVCODEC_VERSION_MINOR 82
+#define LIBAVCODEC_VERSION_MICRO 100
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
LIBAVCODEC_VERSION_MINOR, \
diff --git a/libavformat/riff.c b/libavformat/riff.c
index e38c636..e3fb953 100644
--- a/libavformat/riff.c
+++ b/libavformat/riff.c
@@ -450,6 +450,7 @@ const AVCodecTag ff_codec_bmp_tags[] = {
{ AV_CODEC_ID_SPEEDHQ, MKTAG('S', 'H', 'Q', '9') },
{ AV_CODEC_ID_FMVC, MKTAG('F', 'M', 'V', 'C') },
{ AV_CODEC_ID_SCPR, MKTAG('S', 'C', 'P', 'R') },
+ { AV_CODEC_ID_CLEARVIDEO, MKTAG('U', 'C', 'O', 'D') },
{ AV_CODEC_ID_NONE, 0 }
};
diff --git a/libavformat/rm.c b/libavformat/rm.c
index 0591a17..52c7ccc 100644
--- a/libavformat/rm.c
+++ b/libavformat/rm.c
@@ -43,5 +43,6 @@ const AVCodecTag ff_rm_codec_tags[] = {
{ AV_CODEC_ID_AAC, MKTAG('r','a','a','c') },
{ AV_CODEC_ID_AAC, MKTAG('r','a','c','p') },
{ AV_CODEC_ID_RALF, MKTAG('L','S','D',':') },
+ { AV_CODEC_ID_CLEARVIDEO, MKTAG('C','L','V','1') },
{ AV_CODEC_ID_NONE },
};
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