Merge remote-tracking branch 'qatar/master'

* qatar/master:
  avformat: Avoid a warning about mixed declarations and code
  BMV demuxer and decoder
  matroskaenc: Make sure the seekhead struct is freed even on seek failure
  mpeg12enc: Remove write-only variables.
  mpeg12enc: Don't set up run-level info for level 0.
  msmpeg4: Don't set up run-level info for level 0.
  avformat: Warn about using network functions without calling avformat_network_init
  avformat: Revise wording
  rdt: Set AVFMT_NOFILE on ff_rdt_demuxer
  rdt: Check the return value of avformat_open
  rtsp: Discard the dynamic handler, if it has an alloc function which failed
  dsputil: use cpuflags in x86 versions of vector_clip_int32()

Conflicts:
	libavcodec/avcodec.h
	libavcodec/version.h
	libavformat/Makefile
	libavformat/allformats.c
	libavformat/version.h

Merged-by: Michael Niedermayer <michaelni@gmx.at>

23 files changed, 572 insertions, 46 deletions

diff --git a/Changelog b/Changelog
index 084bac32a9..2e8d8af455 100644
--- a/Changelog
+++ b/Changelog
@@ -118,6 +118,7 @@ easier to use. The changes are:
   AVCodecContext deprecated. Codec private options should be used instead.
 - Properly working defaults in libx264 wrapper, support for native presets.
 - Encrypted OMA files support
+- Discworld II BMV decoding support
 
 
 version 0.8:
diff --git a/doc/general.texi b/doc/general.texi
index e5f83d6d30..f026bfba17 100644
--- a/doc/general.texi
+++ b/doc/general.texi
@@ -71,6 +71,7 @@ library:
 @item Brute Force & Ignorance   @tab   @tab X
     @tab Used in the game Flash Traffic: City of Angels.
 @item BWF                       @tab X @tab X
+@item Discworld II BMV          @tab   @tab X
 @item Interplay C93             @tab   @tab X
     @tab Used in the game Cyberia from Interplay.
 @item Delphine Software International CIN @tab   @tab X
@@ -386,6 +387,7 @@ following image formats are supported:
     @tab AVS1-P2, JiZhun profile, encoding through external library libxavs
 @item Delphine Software International CIN video  @tab     @tab  X
     @tab Codec used in Delphine Software International games.
+@item Discworld II BMV Video @tab     @tab  X
 @item Cinepak                @tab     @tab  X
 @item Cirrus Logic AccuPak   @tab     @tab  X
     @tab fourcc: CLJR
@@ -624,6 +626,7 @@ following image formats are supported:
     @tab decoding supported through external library libcelt
 @item Delphine Software International CIN audio  @tab     @tab  X
     @tab Codec used in Delphine Software International games.
+@item Discworld II BMV Audio @tab     @tab  X
 @item COOK                   @tab     @tab  X
     @tab All versions except 5.1 are supported.
 @item DCA (DTS Coherent Acoustics)  @tab  X  @tab  X
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 0178f8fc6e..2ffb5fdec6 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -100,6 +100,8 @@ OBJS-$(CONFIG_BINKAUDIO_RDFT_DECODER)  += binkaudio.o wma.o
 OBJS-$(CONFIG_BINTEXT_DECODER)         += bintext.o cga_data.o
 OBJS-$(CONFIG_BMP_DECODER)             += bmp.o msrledec.o
 OBJS-$(CONFIG_BMP_ENCODER)             += bmpenc.o
+OBJS-$(CONFIG_BMV_VIDEO_DECODER)       += bmv.o
+OBJS-$(CONFIG_BMV_AUDIO_DECODER)       += bmv.o
 OBJS-$(CONFIG_C93_DECODER)             += c93.o
 OBJS-$(CONFIG_CAVS_DECODER)            += cavs.o cavsdec.o cavsdsp.o \
                                           mpeg12data.o mpegvideo.o
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index 7ba2ab3f89..61678a64e9 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -84,6 +84,7 @@ void avcodec_register_all(void)
     REGISTER_DECODER (BFI, bfi);
     REGISTER_DECODER (BINK, bink);
     REGISTER_ENCDEC  (BMP, bmp);
+    REGISTER_DECODER (BMV_VIDEO, bmv_video);
     REGISTER_DECODER (C93, c93);
     REGISTER_DECODER (CAVS, cavs);
     REGISTER_DECODER (CDGRAPHICS, cdgraphics);
@@ -256,6 +257,7 @@ void avcodec_register_all(void)
     REGISTER_DECODER (ATRAC3, atrac3);
     REGISTER_DECODER (BINKAUDIO_DCT, binkaudio_dct);
     REGISTER_DECODER (BINKAUDIO_RDFT, binkaudio_rdft);
+    REGISTER_DECODER (BMV_AUDIO, bmv_audio);
     REGISTER_DECODER (COOK, cook);
     REGISTER_ENCDEC  (DCA, dca);
     REGISTER_DECODER (DSICINAUDIO, dsicinaudio);
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index aedacd76c8..07377c87c7 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -220,6 +220,7 @@ enum CodecID {
     CODEC_ID_G729_DEPRECATED,
 #endif
     CODEC_ID_UTVIDEO_DEPRECATED,
+    CODEC_ID_BMV_VIDEO,
     CODEC_ID_UTVIDEO = 0x800,
 
     CODEC_ID_G2M        = MKBETAG( 0 ,'G','2','M'),
@@ -363,6 +364,7 @@ enum CodecID {
     CODEC_ID_8SVX_EXP,
     CODEC_ID_8SVX_FIB,
 #endif
+    CODEC_ID_BMV_AUDIO,
     CODEC_ID_G729 = 0x15800,
     CODEC_ID_G723_1= 0x15801,
     CODEC_ID_8SVX_RAW   = MKBETAG('8','S','V','X'),
diff --git a/libavcodec/bmv.c b/libavcodec/bmv.c
new file mode 100644
index 0000000000..86d1e913a2
--- /dev/null
+++ b/libavcodec/bmv.c
@@ -0,0 +1,360 @@
+/*
+ * Discworld II BMV video and audio 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
+ */
+
+#include "avcodec.h"
+#include "bytestream.h"
+
+enum BMVFlags{
+    BMV_NOP = 0,
+    BMV_END,
+    BMV_DELTA,
+    BMV_INTRA,
+
+    BMV_SCROLL  = 0x04,
+    BMV_PALETTE = 0x08,
+    BMV_COMMAND = 0x10,
+    BMV_AUDIO   = 0x20,
+    BMV_EXT     = 0x40,
+    BMV_PRINT   = 0x80
+};
+
+#define SCREEN_WIDE 640
+#define SCREEN_HIGH 429
+
+typedef struct BMVDecContext {
+    AVCodecContext *avctx;
+    AVFrame pic;
+
+    uint8_t *frame, frame_base[SCREEN_WIDE * (SCREEN_HIGH + 1)];
+    uint32_t pal[256];
+    const uint8_t *stream;
+} BMVDecContext;
+
+#define NEXT_BYTE(v) v = forward ? v + 1 : v - 1;
+
+static int decode_bmv_frame(const uint8_t *source, int src_len, uint8_t *frame, int frame_off)
+{
+    int val, saved_val = 0;
+    int tmplen = src_len;
+    const uint8_t *src, *source_end = source + src_len;
+    uint8_t *frame_end = frame + SCREEN_WIDE * SCREEN_HIGH;
+    uint8_t *dst, *dst_end;
+    int len, mask;
+    int forward = (frame_off <= -SCREEN_WIDE) || (frame_off >= 0);
+    int read_two_nibbles, flag;
+    int advance_mode;
+    int mode = 0;
+    int i;
+
+    if (src_len <= 0)
+        return -1;
+
+    if (forward) {
+        src = source;
+        dst = frame;
+        dst_end = frame_end;
+    } else {
+        src = source + src_len - 1;
+        dst = frame_end - 1;
+        dst_end = frame - 1;
+    }
+    for (;;) {
+        int shift = 0;
+        flag = 0;
+
+        /* The mode/len decoding is a bit strange:
+         * values are coded as variable-length codes with nibble units,
+         * code end is signalled by two top bits in the nibble being nonzero.
+         * And since data is bytepacked and we read two nibbles at a time,
+         * we may get a nibble belonging to the next code.
+         * Hence this convoluted loop.
+         */
+        if (!mode || (tmplen == 4)) {
+            if (src < source || src >= source_end)
+                return -1;
+            val = *src;
+            read_two_nibbles = 1;
+        } else {
+            val = saved_val;
+            read_two_nibbles = 0;
+        }
+        if (!(val & 0xC)) {
+            for (;;) {
+                if (!read_two_nibbles) {
+                    if (src < source || src >= source_end)
+                        return -1;
+                    shift += 2;
+                    val |= *src << shift;
+                    if (*src & 0xC)
+                        break;
+                }
+                // two upper bits of the nibble is zero,
+                // so shift top nibble value down into their place
+                read_two_nibbles = 0;
+                shift += 2;
+                mask = (1 << shift) - 1;
+                val = ((val >> 2) & ~mask) | (val & mask);
+                NEXT_BYTE(src);
+                if ((val & (0xC << shift))) {
+                    flag = 1;
+                    break;
+                }
+            }
+        } else if (mode) {
+            flag = tmplen != 4;
+        }
+        if (flag) {
+            tmplen = 4;
+        } else {
+            saved_val = val >> (4 + shift);
+            tmplen = 0;
+            val &= (1 << (shift + 4)) - 1;
+            NEXT_BYTE(src);
+        }
+        advance_mode = val & 1;
+        len = (val >> 1) - 1;
+        mode += 1 + advance_mode;
+        if (mode >= 4)
+            mode -= 3;
+        if (FFABS(dst_end - dst) < len)
+            return -1;
+        switch (mode) {
+        case 1:
+            if (forward) {
+                if (dst - frame + SCREEN_WIDE < frame_off ||
+                        frame_end - dst < frame_off + len)
+                    return -1;
+                for (i = 0; i < len; i++)
+                    dst[i] = dst[frame_off + i];
+                dst += len;
+            } else {
+                dst -= len;
+                if (dst - frame + SCREEN_WIDE < frame_off ||
+                        frame_end - dst < frame_off + len)
+                    return -1;
+                for (i = len - 1; i >= 0; i--)
+                    dst[i] = dst[frame_off + i];
+            }
+            break;
+        case 2:
+            if (forward) {
+                if (source + src_len - src < len)
+                    return -1;
+                memcpy(dst, src, len);
+                dst += len;
+                src += len;
+            } else {
+                if (src - source < len)
+                    return -1;
+                dst -= len;
+                src -= len;
+                memcpy(dst, src, len);
+            }
+            break;
+        case 3:
+            val = forward ? dst[-1] : dst[1];
+            if (forward) {
+                memset(dst, val, len);
+                dst += len;
+            } else {
+                dst -= len;
+                memset(dst, val, len);
+            }
+            break;
+        default:
+            break;
+        }
+        if (dst == dst_end)
+            return 0;
+    }
+    return 0;
+}
+
+static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *pkt)
+{
+    BMVDecContext * const c = avctx->priv_data;
+    int type, scr_off;
+    int i;
+    uint8_t *srcptr, *outptr;
+
+    c->stream = pkt->data;
+    type = bytestream_get_byte(&c->stream);
+    if (type & BMV_AUDIO) {
+        int blobs = bytestream_get_byte(&c->stream);
+        if (pkt->size < blobs * 65 + 2) {
+            av_log(avctx, AV_LOG_ERROR, "Audio data doesn't fit in frame\n");
+            return AVERROR_INVALIDDATA;
+        }
+        c->stream += blobs * 65;
+    }
+    if (type & BMV_COMMAND) {
+        int command_size = (type & BMV_PRINT) ? 8 : 10;
+        if (c->stream - pkt->data + command_size > pkt->size) {
+            av_log(avctx, AV_LOG_ERROR, "Command data doesn't fit in frame\n");
+            return AVERROR_INVALIDDATA;
+        }
+        c->stream += command_size;
+    }
+    if (type & BMV_PALETTE) {
+        if (c->stream - pkt->data > pkt->size - 768) {
+            av_log(avctx, AV_LOG_ERROR, "Palette data doesn't fit in frame\n");
+            return AVERROR_INVALIDDATA;
+        }
+        for (i = 0; i < 256; i++)
+            c->pal[i] = bytestream_get_be24(&c->stream);
+    }
+    if (type & BMV_SCROLL) {
+        if (c->stream - pkt->data > pkt->size - 2) {
+            av_log(avctx, AV_LOG_ERROR, "Screen offset data doesn't fit in frame\n");
+            return AVERROR_INVALIDDATA;
+        }
+        scr_off = (int16_t)bytestream_get_le16(&c->stream);
+    } else if ((type & BMV_INTRA) == BMV_INTRA) {
+        scr_off = -640;
+    } else {
+        scr_off = 0;
+    }
+
+    if (decode_bmv_frame(c->stream, pkt->size - (c->stream - pkt->data), c->frame, scr_off)) {
+        av_log(avctx, AV_LOG_ERROR, "Error decoding frame data\n");
+        return AVERROR_INVALIDDATA;
+    }
+
+    memcpy(c->pic.data[1], c->pal, AVPALETTE_SIZE);
+    c->pic.palette_has_changed = type & BMV_PALETTE;
+
+    outptr = c->pic.data[0];
+    srcptr = c->frame;
+
+    for (i = 0; i < avctx->height; i++) {
+        memcpy(outptr, srcptr, avctx->width);
+        srcptr += avctx->width;
+        outptr += c->pic.linesize[0];
+    }
+
+    *data_size = sizeof(AVFrame);
+    *(AVFrame*)data = c->pic;
+
+    /* always report that the buffer was completely consumed */
+    return pkt->size;
+}
+
+static av_cold int decode_init(AVCodecContext *avctx)
+{
+    BMVDecContext * const c = avctx->priv_data;
+
+    c->avctx = avctx;
+    avctx->pix_fmt = PIX_FMT_PAL8;
+
+    c->pic.reference = 1;
+    if (avctx->get_buffer(avctx, &c->pic) < 0) {
+        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+        return -1;
+    }
+
+    c->frame = c->frame_base + 640;
+
+    return 0;
+}
+
+static av_cold int decode_end(AVCodecContext *avctx)
+{
+    BMVDecContext *c = avctx->priv_data;
+
+    if (c->pic.data[0])
+        avctx->release_buffer(avctx, &c->pic);
+
+    return 0;
+}
+
+static const int bmv_aud_mults[16] = {
+    16512, 8256, 4128, 2064, 1032, 516, 258, 192, 129, 88, 64, 56, 48, 40, 36, 32
+};
+
+static av_cold int bmv_aud_decode_init(AVCodecContext *avctx)
+{
+
+    if (avctx->channels != 2) {
+        av_log(avctx, AV_LOG_INFO, "invalid number of channels\n");
+        return AVERROR(EINVAL);
+    }
+
+    avctx->sample_fmt = AV_SAMPLE_FMT_S16;
+
+    return 0;
+}
+
+static int bmv_aud_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
+                                AVPacket *avpkt)
+{
+    const uint8_t *buf = avpkt->data;
+    int buf_size = avpkt->size;
+    int blocks = 0, total_blocks, i;
+    int out_size;
+    int16_t *output_samples = data;
+    int scale[2];
+
+    total_blocks = *buf++;
+    if (buf_size < total_blocks * 65 + 1) {
+        av_log(avctx, AV_LOG_ERROR, "expected %d bytes, got %d\n",
+               total_blocks * 65 + 1, buf_size);
+        return AVERROR_INVALIDDATA;
+    }
+    out_size = total_blocks * 64 * sizeof(*output_samples);
+    if (*data_size < out_size) {
+        av_log(avctx, AV_LOG_ERROR, "Output buffer is too small\n");
+        return AVERROR(EINVAL);
+    }
+
+    for (blocks = 0; blocks < total_blocks; blocks++) {
+        uint8_t code = *buf++;
+        code = (code >> 1) | (code << 7);
+        scale[0] = bmv_aud_mults[code & 0xF];
+        scale[1] = bmv_aud_mults[code >> 4];
+        for (i = 0; i < 32; i++) {
+            *output_samples++ = av_clip_int16((scale[0] * (int8_t)*buf++) >> 5);
+            *output_samples++ = av_clip_int16((scale[1] * (int8_t)*buf++) >> 5);
+        }
+    }
+
+    *data_size = out_size;
+    return buf_size;
+}
+
+AVCodec ff_bmv_video_decoder = {
+    .name           = "bmv_video",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = CODEC_ID_BMV_VIDEO,
+    .priv_data_size = sizeof(BMVDecContext),
+    .init           = decode_init,
+    .close          = decode_end,
+    .decode         = decode_frame,
+    .long_name      = NULL_IF_CONFIG_SMALL("Discworld II BMV video"),
+};
+
+AVCodec ff_bmv_audio_decoder = {
+    .name           = "bmv_audio",
+    .type           = AVMEDIA_TYPE_AUDIO,
+    .id             = CODEC_ID_BMV_AUDIO,
+    .init           = bmv_aud_decode_init,
+    .decode         = bmv_aud_decode_frame,
+    .long_name      = NULL_IF_CONFIG_SMALL("Discworld II BMV audio"),
+};
diff --git a/libavcodec/mpeg12enc.c b/libavcodec/mpeg12enc.c
index 21b957c8cc..653fb4015c 100644
--- a/libavcodec/mpeg12enc.c
+++ b/libavcodec/mpeg12enc.c
@@ -75,11 +75,12 @@ static void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len){
     for(i=0; i<128; i++){
         int level= i-64;
         int run;
+        if (!level)
+            continue;
         for(run=0; run<64; run++){
-            int len, bits, code;
+            int len, code;
 
             int alevel= FFABS(level);
-            int sign= (level>>31)&1;
 
             if (alevel > rl->max_level[0][run])
                 code= 111; /*rl->n*/
@@ -87,25 +88,15 @@ static void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len){
                 code= rl->index_run[0][run] + alevel - 1;
 
             if (code < 111 /* rl->n */) {
-                /* store the vlc & sign at once */
+                /* length of vlc and sign */
                 len=   rl->table_vlc[code][1]+1;
-                bits= (rl->table_vlc[code][0]<<1) + sign;
             } else {
                 len=  rl->table_vlc[111/*rl->n*/][1]+6;
-                bits= rl->table_vlc[111/*rl->n*/][0]<<6;
 
-                bits|= run;
                 if (alevel < 128) {
-                    bits<<=8; len+=8;
-                    bits|= level & 0xff;
+                    len += 8;
                 } else {
-                    bits<<=16; len+=16;
-                    bits|= level & 0xff;
-                    if (level < 0) {
-                        bits|= 0x8001 + level + 255;
-                    } else {
-                        bits|= level & 0xffff;
-                    }
+                    len += 16;
                 }
             }
 
diff --git a/libavcodec/msmpeg4.c b/libavcodec/msmpeg4.c
index 8997f6d054..b364845c25 100644
--- a/libavcodec/msmpeg4.c
+++ b/libavcodec/msmpeg4.c
@@ -266,7 +266,7 @@ av_cold void ff_msmpeg4_encode_init(MpegEncContext *s)
 
         for(i=0; i<NB_RL_TABLES; i++){
             int level;
-            for(level=0; level<=MAX_LEVEL; level++){
+            for (level = 1; level <= MAX_LEVEL; level++) {
                 int run;
                 for(run=0; run<=MAX_RUN; run++){
                     int last;
diff --git a/libavcodec/version.h b/libavcodec/version.h
index 6cbc3f650a..b09a9c5314 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -21,7 +21,7 @@
 #define AVCODEC_VERSION_H
 
 #define LIBAVCODEC_VERSION_MAJOR 53
-#define LIBAVCODEC_VERSION_MINOR 28
+#define LIBAVCODEC_VERSION_MINOR 29
 #define LIBAVCODEC_VERSION_MICRO  0
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
diff --git a/libavcodec/x86/dsputil_mmx.c b/libavcodec/x86/dsputil_mmx.c
index 8ec3a081aa..844066200b 100644
--- a/libavcodec/x86/dsputil_mmx.c
+++ b/libavcodec/x86/dsputil_mmx.c
@@ -2402,9 +2402,9 @@ void ff_vector_clip_int32_mmx     (int32_t *dst, const int32_t *src, int32_t min
                                    int32_t max, unsigned int len);
 void ff_vector_clip_int32_sse2    (int32_t *dst, const int32_t *src, int32_t min,
                                    int32_t max, unsigned int len);
-void ff_vector_clip_int32_sse2_int(int32_t *dst, const int32_t *src, int32_t min,
+void ff_vector_clip_int32_int_sse2(int32_t *dst, const int32_t *src, int32_t min,
                                    int32_t max, unsigned int len);
-void ff_vector_clip_int32_sse41   (int32_t *dst, const int32_t *src, int32_t min,
+void ff_vector_clip_int32_sse4    (int32_t *dst, const int32_t *src, int32_t min,
                                    int32_t max, unsigned int len);
 
 void dsputil_init_mmx(DSPContext* c, AVCodecContext *avctx)
@@ -2858,7 +2858,7 @@ void dsputil_init_mmx(DSPContext* c, AVCodecContext *avctx)
             c->scalarproduct_int16 = ff_scalarproduct_int16_sse2;
             c->scalarproduct_and_madd_int16 = ff_scalarproduct_and_madd_int16_sse2;
             if (mm_flags & AV_CPU_FLAG_ATOM) {
-                c->vector_clip_int32 = ff_vector_clip_int32_sse2_int;
+                c->vector_clip_int32 = ff_vector_clip_int32_int_sse2;
             } else {
                 c->vector_clip_int32 = ff_vector_clip_int32_sse2;
             }
@@ -2890,7 +2890,7 @@ void dsputil_init_mmx(DSPContext* c, AVCodecContext *avctx)
 
         if (mm_flags & AV_CPU_FLAG_SSE4 && HAVE_SSE) {
 #if HAVE_YASM
-            c->vector_clip_int32 = ff_vector_clip_int32_sse41;
+            c->vector_clip_int32 = ff_vector_clip_int32_sse4;
 #endif
         }
 
diff --git a/libavcodec/x86/dsputil_yasm.asm b/libavcodec/x86/dsputil_yasm.asm
index 6627d21bd8..82678f1880 100644
--- a/libavcodec/x86/dsputil_yasm.asm
+++ b/libavcodec/x86/dsputil_yasm.asm
@@ -1055,9 +1055,14 @@ emu_edge mmx
 ;                           int32_t max, unsigned int len)
 ;-----------------------------------------------------------------------------
 
-%macro VECTOR_CLIP_INT32 4
-cglobal vector_clip_int32_%1, 5,5,%2, dst, src, min, max, len
-%ifidn %1, sse2
+; %1 = number of xmm registers used
+; %2 = number of inline load/process/store loops per asm loop
+; %3 = process 4*mmsize (%3=0) or 8*mmsize (%3=1) bytes per loop
+; %4 = CLIPD function takes min/max as float instead of int (CLIPD_SSE2)
+; %5 = suffix
+%macro VECTOR_CLIP_INT32 4-5
+cglobal vector_clip_int32%5, 5,5,%2, dst, src, min, max, len
+%if %4
     cvtsi2ss  m4, minm
     cvtsi2ss  m5, maxm
 %else
@@ -1068,12 +1073,12 @@ cglobal vector_clip_int32_%1, 5,5,%2, dst, src, min, max, len
     SPLATD    m5
 .loop:
 %assign %%i 1
-%rep %3
+%rep %2
     mova      m0,  [srcq+mmsize*0*%%i]
     mova      m1,  [srcq+mmsize*1*%%i]
     mova      m2,  [srcq+mmsize*2*%%i]
     mova      m3,  [srcq+mmsize*3*%%i]
-%if %4
+%if %3
     mova      m7,  [srcq+mmsize*4*%%i]
     mova      m8,  [srcq+mmsize*5*%%i]
     mova      m9,  [srcq+mmsize*6*%%i]
@@ -1083,7 +1088,7 @@ cglobal vector_clip_int32_%1, 5,5,%2, dst, src, min, max, len
     CLIPD  m1,  m4, m5, m6
     CLIPD  m2,  m4, m5, m6
     CLIPD  m3,  m4, m5, m6
-%if %4
+%if %3
     CLIPD  m7,  m4, m5, m6
     CLIPD  m8,  m4, m5, m6
     CLIPD  m9,  m4, m5, m6
@@ -1093,7 +1098,7 @@ cglobal vector_clip_int32_%1, 5,5,%2, dst, src, min, max, len
     mova  [dstq+mmsize*1*%%i], m1
     mova  [dstq+mmsize*2*%%i], m2
     mova  [dstq+mmsize*3*%%i], m3
-%if %4
+%if %3
     mova  [dstq+mmsize*4*%%i], m7
     mova  [dstq+mmsize*5*%%i], m8
     mova  [dstq+mmsize*6*%%i], m9
@@ -1101,25 +1106,26 @@ cglobal vector_clip_int32_%1, 5,5,%2, dst, src, min, max, len
 %endif
 %assign %%i %%i+1
 %endrep
-    add     srcq, mmsize*4*(%3+%4)
-    add     dstq, mmsize*4*(%3+%4)
-    sub     lend, mmsize*(%3+%4)
+    add     srcq, mmsize*4*(%2+%3)
+    add     dstq, mmsize*4*(%2+%3)
+    sub     lend, mmsize*(%2+%3)
     jg .loop
     REP_RET
 %endmacro
 
-INIT_MMX
+INIT_MMX mmx
 %define SPLATD SPLATD_MMX
 %define CLIPD CLIPD_MMX
-VECTOR_CLIP_INT32 mmx, 0, 1, 0
-INIT_XMM
+VECTOR_CLIP_INT32 0, 1, 0, 0
+INIT_XMM sse2
 %define SPLATD SPLATD_SSE2
-VECTOR_CLIP_INT32 sse2_int, 6, 1, 0
+VECTOR_CLIP_INT32 6, 1, 0, 0, _int
 %define CLIPD CLIPD_SSE2
-VECTOR_CLIP_INT32 sse2, 6, 2, 0
+VECTOR_CLIP_INT32 6, 2, 0, 1
+INIT_XMM sse4
 %define CLIPD CLIPD_SSE41
 %ifdef m8
-VECTOR_CLIP_INT32 sse41, 11, 1, 1
+VECTOR_CLIP_INT32 11, 1, 1, 0
 %else
-VECTOR_CLIP_INT32 sse41, 6, 1, 0
+VECTOR_CLIP_INT32 6, 1, 0, 0
 %endif
diff --git a/libavformat/Makefile b/libavformat/Makefile
index 420143db67..32fac6a8e9 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -53,6 +53,7 @@ OBJS-$(CONFIG_BINK_DEMUXER)              += bink.o
 OBJS-$(CONFIG_BINTEXT_DEMUXER)           += bintext.o sauce.o
 OBJS-$(CONFIG_BIT_DEMUXER)               += bit.o
 OBJS-$(CONFIG_BIT_MUXER)                 += bit.o
+OBJS-$(CONFIG_BMV_DEMUXER)               += bmv.o
 OBJS-$(CONFIG_C93_DEMUXER)               += c93.o vocdec.o voc.o
 OBJS-$(CONFIG_CAF_DEMUXER)               += cafdec.o caf.o mov.o riff.o isom.o
 OBJS-$(CONFIG_CAF_MUXER)                 += cafenc.o caf.o riff.o isom.o
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index ced4b0a217..23d568c017 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -74,6 +74,7 @@ void av_register_all(void)
     REGISTER_DEMUXER  (BINTEXT, bintext);
     REGISTER_DEMUXER  (BINK, bink);
     REGISTER_MUXDEMUX (BIT, bit);
+    REGISTER_DEMUXER  (BMV, bmv);
     REGISTER_DEMUXER  (C93, c93);
     REGISTER_MUXDEMUX (CAF, caf);
     REGISTER_MUXDEMUX (CAVSVIDEO, cavsvideo);
diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index 0fcc38baf9..1b0229daee 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -1860,8 +1860,8 @@ const AVClass *avformat_get_class(void);
  * but recommended, since it avoids the overhead of implicitly
  * doing the setup for each session.
  *
- * Since the next major version bump, calling this function will become
- * mandatory if using network protocols.
+ * Calling this function will become mandatory if using network
+ * protocols at some major version bump.
  */
 int avformat_network_init(void);
 
diff --git a/libavformat/bmv.c b/libavformat/bmv.c
new file mode 100644
index 0000000000..fb41712868
--- /dev/null
+++ b/libavformat/bmv.c
@@ -0,0 +1,136 @@
+/*
+ * Discworld II BMV demuxer
+ * 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
+ */
+
+#include "avformat.h"
+
+enum BMVFlags {
+    BMV_NOP = 0,
+    BMV_END,
+    BMV_DELTA,
+    BMV_INTRA,
+
+    BMV_AUDIO   = 0x20,
+};
+
+typedef struct BMVContext {
+    uint8_t *packet;
+    int      size;
+    int      get_next;
+    int64_t  audio_pos;
+} BMVContext;
+
+static int bmv_read_header(AVFormatContext *s, AVFormatParameters *ap)
+{
+    AVStream *st, *ast;
+    BMVContext *c = s->priv_data;
+
+    st = avformat_new_stream(s, 0);
+    if (!st)
+        return AVERROR(ENOMEM);
+    st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
+    st->codec->codec_id   = CODEC_ID_BMV_VIDEO;
+    st->codec->width      = 640;
+    st->codec->height     = 429;
+    st->codec->pix_fmt    = PIX_FMT_PAL8;
+    av_set_pts_info(st, 16, 1, 12);
+    ast = avformat_new_stream(s, 0);
+    if (!ast)
+        return AVERROR(ENOMEM);
+    ast->codec->codec_type      = AVMEDIA_TYPE_AUDIO;
+    ast->codec->codec_id        = CODEC_ID_BMV_AUDIO;
+    ast->codec->channels        = 2;
+    ast->codec->sample_rate     = 22050;
+    av_set_pts_info(ast, 16, 1, 22050);
+
+    c->get_next  = 1;
+    c->audio_pos = 0;
+    return 0;
+}
+
+static int bmv_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+    BMVContext *c = s->priv_data;
+    int type;
+    void *tmp;
+
+    while (c->get_next) {
+        if (s->pb->eof_reached)
+            return AVERROR_EOF;
+        type = avio_r8(s->pb);
+        if (type == BMV_NOP)
+            continue;
+        if (type == BMV_END)
+            return AVERROR_EOF;
+        c->size = avio_rl24(s->pb);
+        if (!c->size)
+            return AVERROR_INVALIDDATA;
+        tmp = av_realloc(c->packet, c->size + 1);
+        if (!tmp)
+            return AVERROR(ENOMEM);
+        c->packet = tmp;
+        c->packet[0] = type;
+        if (avio_read(s->pb, c->packet + 1, c->size) != c->size)
+            return AVERROR(EIO);
+        if (type & BMV_AUDIO) {
+            int audio_size = c->packet[1] * 65 + 1;
+            if (audio_size >= c->size) {
+                av_log(s, AV_LOG_ERROR, "Reported audio size %d is bigger than packet size (%d)\n",
+                       audio_size, c->size);
+                return AVERROR_INVALIDDATA;
+            }
+            if (av_new_packet(pkt, audio_size) < 0)
+                return AVERROR(ENOMEM);
+            memcpy(pkt->data, c->packet + 1, pkt->size);
+            pkt->stream_index = 1;
+            pkt->pts          = c->audio_pos;
+            pkt->duration     = c->packet[1] * 32;
+            c->audio_pos += pkt->duration;
+            c->get_next   = 0;
+            return pkt->size;
+        } else
+            break;
+    }
+    if (av_new_packet(pkt, c->size + 1) < 0)
+        return AVERROR(ENOMEM);
+    pkt->stream_index = 0;
+    c->get_next = 1;
+    memcpy(pkt->data, c->packet, pkt->size);
+    return pkt->size;
+}
+
+static int bmv_read_close(AVFormatContext *s)
+{
+    BMVContext *c = s->priv_data;
+
+    av_freep(&c->packet);
+
+    return 0;
+}
+
+AVInputFormat ff_bmv_demuxer = {
+    .name           = "bmv",
+    .long_name      = NULL_IF_CONFIG_SMALL("Discworld II BMV"),
+    .priv_data_size = sizeof(BMVContext),
+    .read_header    = bmv_read_header,
+    .read_packet    = bmv_read_packet,
+    .read_close     = bmv_read_close,
+    .extensions     = "bmv"
+};
diff --git a/libavformat/matroskaenc.c b/libavformat/matroskaenc.c
index 131a7498af..f22e084449 100644
--- a/libavformat/matroskaenc.c
+++ b/libavformat/matroskaenc.c
@@ -317,9 +317,12 @@ static int64_t mkv_write_seekhead(AVIOContext *pb, mkv_seekhead *seekhead)
 
     currentpos = avio_tell(pb);
 
-    if (seekhead->reserved_size > 0)
-        if (avio_seek(pb, seekhead->filepos, SEEK_SET) < 0)
-            return -1;
+    if (seekhead->reserved_size > 0) {
+        if (avio_seek(pb, seekhead->filepos, SEEK_SET) < 0) {
+            currentpos = -1;
+            goto fail;
+        }
+    }
 
     metaseek = start_ebml_master(pb, MATROSKA_ID_SEEKHEAD, seekhead->reserved_size);
     for (i = 0; i < seekhead->num_entries; i++) {
@@ -343,6 +346,7 @@ static int64_t mkv_write_seekhead(AVIOContext *pb, mkv_seekhead *seekhead)
 
         currentpos = seekhead->filepos;
     }
+fail:
     av_free(seekhead->entries);
     av_free(seekhead);
 
diff --git a/libavformat/network.c b/libavformat/network.c
index e5482a1475..e27c64d3c0 100644
--- a/libavformat/network.c
+++ b/libavformat/network.c
@@ -120,8 +120,15 @@ void ff_tls_deinit(void)
     avpriv_unlock_avformat();
 }
 
+int ff_network_inited_globally;
+
 int ff_network_init(void)
 {
+    if (!ff_network_inited_globally)
+        av_log(NULL, AV_LOG_WARNING, "Using network protocols without global "
+                                     "network initialization. Please use "
+                                     "avformat_network_init(), this will "
+                                     "become mandatory later.\n");
 #if HAVE_WINSOCK2_H
     WSADATA wsaData;
     if (WSAStartup(MAKEWORD(1,1), &wsaData))
diff --git a/libavformat/network.h b/libavformat/network.h
index cfbbd83ab2..9f7b78202e 100644
--- a/libavformat/network.h
+++ b/libavformat/network.h
@@ -56,6 +56,7 @@ int ff_neterrno(void);
 
 int ff_socket_nonblock(int socket, int enable);
 
+extern int ff_network_inited_globally;
 int ff_network_init(void);
 void ff_network_close(void);
 
diff --git a/libavformat/rdt.c b/libavformat/rdt.c
index 74f9c55fba..947ba80b54 100644
--- a/libavformat/rdt.c
+++ b/libavformat/rdt.c
@@ -524,7 +524,11 @@ rdt_new_context (void)
 {
     PayloadContext *rdt = av_mallocz(sizeof(PayloadContext));
 
-    avformat_open_input(&rdt->rmctx, "", &ff_rdt_demuxer, NULL);
+    int ret = avformat_open_input(&rdt->rmctx, "", &ff_rdt_demuxer, NULL);
+    if (ret < 0) {
+        av_free(rdt);
+        return NULL;
+    }
 
     return rdt;
 }
diff --git a/libavformat/rmdec.c b/libavformat/rmdec.c
index b73b51aaf8..0d88e765d1 100644
--- a/libavformat/rmdec.c
+++ b/libavformat/rmdec.c
@@ -975,4 +975,5 @@ AVInputFormat ff_rdt_demuxer = {
     .long_name      = NULL_IF_CONFIG_SMALL("RDT demuxer"),
     .priv_data_size = sizeof(RMDemuxContext),
     .read_close     = rm_read_close,
+    .flags          = AVFMT_NOFILE,
 };
diff --git a/libavformat/rtsp.c b/libavformat/rtsp.c
index b23100df62..c53b728271 100644
--- a/libavformat/rtsp.c
+++ b/libavformat/rtsp.c
@@ -172,8 +172,11 @@ static void init_rtp_handler(RTPDynamicProtocolHandler *handler,
         return;
     codec->codec_id          = handler->codec_id;
     rtsp_st->dynamic_handler = handler;
-    if (handler->alloc)
+    if (handler->alloc) {
         rtsp_st->dynamic_protocol_context = handler->alloc();
+        if (!rtsp_st->dynamic_protocol_context)
+            rtsp_st->dynamic_handler = NULL;
+    }
 }
 
 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */
diff --git a/libavformat/utils.c b/libavformat/utils.c
index 35a6ab89a5..f32f2384ed 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -4188,6 +4188,7 @@ int avformat_network_init(void)
 {
 #if CONFIG_NETWORK
     int ret;
+    ff_network_inited_globally = 1;
     if ((ret = ff_network_init()) < 0)
         return ret;
     ff_tls_init();
diff --git a/libavformat/version.h b/libavformat/version.h
index bc427d3f4e..954d87a88e 100644
--- a/libavformat/version.h
+++ b/libavformat/version.h
@@ -24,7 +24,7 @@
 #include "libavutil/avutil.h"
 
 #define LIBAVFORMAT_VERSION_MAJOR 53
-#define LIBAVFORMAT_VERSION_MINOR 19
+#define LIBAVFORMAT_VERSION_MINOR 20
 #define LIBAVFORMAT_VERSION_MICRO  0
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \