Merge commit 'a3a0af4fb1237bed0af75868073f9a63db8b1864'

* commit 'a3a0af4fb1237bed0af75868073f9a63db8b1864':
  avutil: make aes and sha api public
  handle malloc failures in ff_get_wav_header
  add xWMA demuxer
  mpegts: force the default timebase
  libavcodec: Bump micro after adding the dtx AVOptions

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

18 files changed, 305 insertions, 19 deletions

diff --git a/Changelog b/Changelog
index d56780b9c2..a57c1e72e7 100644
--- a/Changelog
+++ b/Changelog
@@ -93,6 +93,7 @@ version <next>:
 - fieldorder video filter added
 - AAC encoding via libvo-aacenc
 - AMR-WB encoding via libvo-amrwbenc
+- xWMA demuxer
 
 
 version 0.6:
diff --git a/doc/general.texi b/doc/general.texi
index 5f75cef99c..303b5fbba6 100644
--- a/doc/general.texi
+++ b/doc/general.texi
@@ -259,6 +259,8 @@ library:
     @tab Multimedia format used in Westwood Studios games.
 @item Westwood Studios VQA      @tab   @tab X
     @tab Multimedia format used in Westwood Studios games.
+@item xWMA                      @tab   @tab X
+    @tab Microsoft audio container used by XAudio 2.
 @item YUV4MPEG pipe             @tab X @tab X
 @item Psygnosis YOP             @tab   @tab X
 @end multitable
diff --git a/libavcodec/libvo-aacenc.c b/libavcodec/libvo-aacenc.c
index f2a19a1814..3475a5cfe6 100644
--- a/libavcodec/libvo-aacenc.c
+++ b/libavcodec/libvo-aacenc.c
@@ -2,20 +2,20 @@
  * AAC encoder wrapper
  * Copyright (c) 2010 Martin Storsjo
  *
- * This file is part of Libav.
+ * This file is part of FFmpeg.
  *
- * Libav is free software; you can redistribute it and/or
+ * 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.
  *
- * Libav is distributed in the hope that it will be useful,
+ * 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 Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
diff --git a/libavcodec/libvo-amrwbenc.c b/libavcodec/libvo-amrwbenc.c
index d8a6099561..7b9e66a247 100644
--- a/libavcodec/libvo-amrwbenc.c
+++ b/libavcodec/libvo-amrwbenc.c
@@ -2,20 +2,20 @@
  * AMR Audio encoder stub
  * Copyright (c) 2003 the ffmpeg project
  *
- * This file is part of Libav.
+ * This file is part of FFmpeg.
  *
- * Libav is free software; you can redistribute it and/or
+ * 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.
  *
- * Libav is distributed in the hope that it will be useful,
+ * 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 Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
diff --git a/libavcodec/version.h b/libavcodec/version.h
index bad6509a03..0e2d766bfe 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -22,7 +22,7 @@
 
 #define LIBAVCODEC_VERSION_MAJOR 52
 #define LIBAVCODEC_VERSION_MINOR 119
-#define LIBAVCODEC_VERSION_MICRO  0
+#define LIBAVCODEC_VERSION_MICRO  1
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \
diff --git a/libavformat/Makefile b/libavformat/Makefile
index c687d86831..18f8c492d0 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -302,6 +302,7 @@ OBJS-$(CONFIG_WSVQA_DEMUXER)             += westwood.o
 OBJS-$(CONFIG_WTV_DEMUXER)               += wtv.o asf.o asfdec.o mpegts.o riff.o
 OBJS-$(CONFIG_WV_DEMUXER)                += wv.o apetag.o
 OBJS-$(CONFIG_XA_DEMUXER)                += xa.o
+OBJS-$(CONFIG_XWMA_DEMUXER)              += xwma.o riff.o
 OBJS-$(CONFIG_YOP_DEMUXER)               += yop.o
 OBJS-$(CONFIG_YUV4MPEGPIPE_MUXER)        += yuv4mpeg.o
 OBJS-$(CONFIG_YUV4MPEGPIPE_DEMUXER)      += yuv4mpeg.o
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index f0e98eddbe..4f28ab7e08 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -227,6 +227,7 @@ void av_register_all(void)
     REGISTER_DEMUXER  (WTV, wtv);
     REGISTER_DEMUXER  (WV, wv);
     REGISTER_DEMUXER  (XA, xa);
+    REGISTER_DEMUXER  (XWMA, xwma);
     REGISTER_DEMUXER  (YOP, yop);
     REGISTER_MUXDEMUX (YUV4MPEGPIPE, yuv4mpegpipe);
 
diff --git a/libavformat/asfdec.c b/libavformat/asfdec.c
index dbb3f82205..0ff992c691 100644
--- a/libavformat/asfdec.c
+++ b/libavformat/asfdec.c
@@ -280,7 +280,9 @@ static int asf_read_stream_properties(AVFormatContext *s, int64_t size)
 
     st->codec->codec_type = type;
     if (type == AVMEDIA_TYPE_AUDIO) {
-        ff_get_wav_header(pb, st->codec, type_specific_size);
+        int ret = ff_get_wav_header(pb, st->codec, type_specific_size);
+        if (ret < 0)
+            return ret;
         if (is_dvr_ms_audio) {
             // codec_id and codec_tag are unreliable in dvr_ms
             // files. Set them later by probing stream.
diff --git a/libavformat/avidec.c b/libavformat/avidec.c
index ad0d098a12..7df37065ec 100644
--- a/libavformat/avidec.c
+++ b/libavformat/avidec.c
@@ -345,6 +345,7 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
     int avih_width=0, avih_height=0;
     int amv_file_format=0;
     uint64_t list_end = 0;
+    int ret;
 
     avi->stream_index= -1;
 
@@ -623,7 +624,9 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
 //                    avio_skip(pb, size - 5 * 4);
                     break;
                 case AVMEDIA_TYPE_AUDIO:
-                    ff_get_wav_header(pb, st->codec, size);
+                    ret = ff_get_wav_header(pb, st->codec, size);
+                    if (ret < 0)
+                        return ret;
                     ast->dshow_block_align= st->codec->block_align;
                     if(ast->sample_size && st->codec->block_align && ast->sample_size != st->codec->block_align){
                         av_log(s, AV_LOG_WARNING, "sample size (%d) != block align (%d)\n", ast->sample_size, st->codec->block_align);
diff --git a/libavformat/dxa.c b/libavformat/dxa.c
index cf93df70d4..15147a7a8d 100644
--- a/libavformat/dxa.c
+++ b/libavformat/dxa.c
@@ -60,6 +60,7 @@ static int dxa_read_header(AVFormatContext *s, AVFormatParameters *ap)
     int w, h;
     int num, den;
     int flags;
+    int ret;
 
     tag = avio_rl32(pb);
     if (tag != MKTAG('D', 'E', 'X', 'A'))
@@ -102,7 +103,9 @@ static int dxa_read_header(AVFormatContext *s, AVFormatParameters *ap)
         ast = av_new_stream(s, 0);
         if (!ast)
             return -1;
-        ff_get_wav_header(pb, ast->codec, fsize);
+        ret = ff_get_wav_header(pb, ast->codec, fsize);
+        if (ret < 0)
+            return ret;
         // find 'data' chunk
         while(avio_tell(pb) < c->vidpos && !url_feof(pb)){
             tag = avio_rl32(pb);
diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c
index 55f62b8f6f..ab67e110c2 100644
--- a/libavformat/matroskadec.c
+++ b/libavformat/matroskadec.c
@@ -1332,9 +1332,12 @@ static int matroska_read_header(AVFormatContext *s, AVFormatParameters *ap)
         } else if (!strcmp(track->codec_id, "A_MS/ACM")
                    && track->codec_priv.size >= 14
                    && track->codec_priv.data != NULL) {
+            int ret;
             ffio_init_context(&b, track->codec_priv.data, track->codec_priv.size,
                           AVIO_RDONLY, NULL, NULL, NULL, NULL);
-            ff_get_wav_header(&b, st->codec, track->codec_priv.size);
+            ret = ff_get_wav_header(&b, st->codec, track->codec_priv.size);
+            if (ret < 0)
+                return ret;
             codec_id = st->codec->codec_id;
             extradata_offset = FFMIN(track->codec_priv.size, 18);
         } else if (!strcmp(track->codec_id, "V_QUICKTIME")
diff --git a/libavformat/mpegtsenc.c b/libavformat/mpegtsenc.c
index 3461a33a6a..ccaa2f80aa 100644
--- a/libavformat/mpegtsenc.c
+++ b/libavformat/mpegtsenc.c
@@ -479,6 +479,7 @@ static int mpegts_write_header(AVFormatContext *s)
     /* assign pids to each stream */
     for(i = 0;i < s->nb_streams; i++) {
         st = s->streams[i];
+        av_set_pts_info(st, 33, 1, 90000);
         ts_st = av_mallocz(sizeof(MpegTSWriteStream));
         if (!ts_st)
             goto fail;
diff --git a/libavformat/riff.c b/libavformat/riff.c
index a818fe5c94..5a40d9a339 100644
--- a/libavformat/riff.c
+++ b/libavformat/riff.c
@@ -488,7 +488,7 @@ void ff_put_bmp_header(AVIOContext *pb, AVCodecContext *enc, const AVCodecTag *t
  * WAVEFORMATEX adds 'WORD  cbSize' and basically makes itself
  * an openended structure.
  */
-void ff_get_wav_header(AVIOContext *pb, AVCodecContext *codec, int size)
+int ff_get_wav_header(AVIOContext *pb, AVCodecContext *codec, int size)
 {
     int id;
 
@@ -531,6 +531,8 @@ void ff_get_wav_header(AVIOContext *pb, AVCodecContext *codec, int size)
         codec->extradata_size = cbSize;
         if (cbSize > 0) {
             codec->extradata = av_mallocz(codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
+            if (!codec->extradata)
+                return AVERROR(ENOMEM);
             avio_read(pb, codec->extradata, codec->extradata_size);
             size -= cbSize;
         }
@@ -544,6 +546,8 @@ void ff_get_wav_header(AVIOContext *pb, AVCodecContext *codec, int size)
         codec->channels    = 0;
         codec->sample_rate = 0;
     }
+
+    return 0;
 }
 
 
diff --git a/libavformat/riff.h b/libavformat/riff.h
index d5e1cdf7d8..85caacbb69 100644
--- a/libavformat/riff.h
+++ b/libavformat/riff.h
@@ -45,7 +45,7 @@ int ff_get_bmp_header(AVIOContext *pb, AVStream *st);
 void ff_put_bmp_header(AVIOContext *pb, AVCodecContext *enc, const AVCodecTag *tags, int for_asf);
 int ff_put_wav_header(AVIOContext *pb, AVCodecContext *enc);
 enum CodecID ff_wav_codec_get_id(unsigned int tag, int bps);
-void ff_get_wav_header(AVIOContext *pb, AVCodecContext *codec, int size);
+int ff_get_wav_header(AVIOContext *pb, AVCodecContext *codec, int size);
 
 extern const AVCodecTag ff_codec_bmp_tags[];
 extern const AVCodecTag ff_codec_wav_tags[];
diff --git a/libavformat/version.h b/libavformat/version.h
index e795263a6d..eec52b2363 100644
--- a/libavformat/version.h
+++ b/libavformat/version.h
@@ -24,7 +24,7 @@
 #include "libavutil/avutil.h"
 
 #define LIBAVFORMAT_VERSION_MAJOR 52
-#define LIBAVFORMAT_VERSION_MINOR 107
+#define LIBAVFORMAT_VERSION_MINOR 108
 #define LIBAVFORMAT_VERSION_MICRO  0
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
diff --git a/libavformat/wav.c b/libavformat/wav.c
index afdd70114e..588aff512b 100644
--- a/libavformat/wav.c
+++ b/libavformat/wav.c
@@ -195,6 +195,7 @@ static int wav_read_header(AVFormatContext *s,
     AVIOContext *pb = s->pb;
     AVStream *st;
     WAVContext *wav = s->priv_data;
+    int ret;
 
     /* check RIFF header */
     tag = avio_rl32(pb);
@@ -227,7 +228,9 @@ static int wav_read_header(AVFormatContext *s,
     if (!st)
         return AVERROR(ENOMEM);
 
-    ff_get_wav_header(pb, st->codec, size);
+    ret = ff_get_wav_header(pb, st->codec, size);
+    if (ret < 0)
+        return ret;
     st->need_parsing = AVSTREAM_PARSE_FULL;
 
     av_set_pts_info(st, 64, 1, st->codec->sample_rate);
@@ -383,6 +386,7 @@ static int w64_read_header(AVFormatContext *s, AVFormatParameters *ap)
     WAVContext    *wav = s->priv_data;
     AVStream *st;
     uint8_t guid[16];
+    int ret;
 
     avio_read(pb, guid, 16);
     if (memcmp(guid, guid_riff, 16))
@@ -408,7 +412,9 @@ static int w64_read_header(AVFormatContext *s, AVFormatParameters *ap)
         return AVERROR(ENOMEM);
 
     /* subtract chunk header size - normal wav file doesn't count it */
-    ff_get_wav_header(pb, st->codec, size - 24);
+    ret = ff_get_wav_header(pb, st->codec, size - 24);
+    if (ret < 0)
+        return ret;
     avio_skip(pb, FFALIGN(size, INT64_C(8)) - size);
 
     st->need_parsing = AVSTREAM_PARSE_FULL;
diff --git a/libavformat/wtv.c b/libavformat/wtv.c
index 756ba93e7a..795ea39bf9 100644
--- a/libavformat/wtv.c
+++ b/libavformat/wtv.c
@@ -645,7 +645,9 @@ static AVStream * parse_media_type(AVFormatContext *s, AVStream *st, int sid,
         if (!st)
             return NULL;
         if (!ff_guidcmp(formattype, format_waveformatex)) {
-            ff_get_wav_header(pb, st->codec, size);
+            int ret = ff_get_wav_header(pb, st->codec, size);
+            if (ret < 0)
+                return NULL;
         } else {
             if (ff_guidcmp(formattype, format_none))
                 av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
diff --git a/libavformat/xwma.c b/libavformat/xwma.c
new file mode 100644
index 0000000000..543d998007
--- /dev/null
+++ b/libavformat/xwma.c
@@ -0,0 +1,257 @@
+/*
+ * xWMA demuxer
+ * Copyright (c) 2011 Max Horn
+ *
+ * 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
+ */
+
+#include "avformat.h"
+#include "riff.h"
+
+/*
+ * Demuxer for xWMA, a Microsoft audio container used by XAudio 2.
+ */
+
+typedef struct {
+    int64_t data_end;
+} XWMAContext;
+
+static int xwma_probe(AVProbeData *p)
+{
+    if (!memcmp(p->buf, "RIFF", 4) && !memcmp(p->buf + 8, "XWMA", 4))
+        return AVPROBE_SCORE_MAX;
+    return 0;
+}
+
+static int xwma_read_header(AVFormatContext *s, AVFormatParameters *ap)
+{
+    int64_t size, av_uninit(data_size);
+    int ret;
+    uint32_t dpds_table_size = 0;
+    uint32_t *dpds_table = 0;
+    unsigned int tag;
+    AVIOContext *pb = s->pb;
+    AVStream *st;
+    XWMAContext *xwma = s->priv_data;
+    int i;
+
+    /* The following code is mostly copied from wav.c, with some
+     * minor alterations.
+     */
+
+    /* check RIFF header */
+    tag = avio_rl32(pb);
+    if (tag != MKTAG('R', 'I', 'F', 'F'))
+        return -1;
+    avio_rl32(pb); /* file size */
+    tag = avio_rl32(pb);
+    if (tag != MKTAG('X', 'W', 'M', 'A'))
+        return -1;
+
+    /* parse fmt header */
+    tag = avio_rl32(pb);
+    if (tag != MKTAG('f', 'm', 't', ' '))
+        return -1;
+    size = avio_rl32(pb);
+    st = av_new_stream(s, 0);
+    if (!st)
+        return AVERROR(ENOMEM);
+
+    ret = ff_get_wav_header(pb, st->codec, size);
+    if (ret < 0)
+        return ret;
+    st->need_parsing = AVSTREAM_PARSE_NONE;
+
+    /* All xWMA files I have seen contained WMAv2 data. If there are files
+     * using WMA Pro or some other codec, then we need to figure out the right
+     * extradata for that. Thus, ask the user for feedback, but try to go on
+     * anyway.
+     */
+    if (st->codec->codec_id != CODEC_ID_WMAV2) {
+        av_log(s, AV_LOG_WARNING, "unexpected codec (tag 0x04%x; id %d)\n",
+                              st->codec->codec_tag, st->codec->codec_id);
+        av_log_ask_for_sample(s, NULL);
+    } else {
+        /* In all xWMA files I have seen, there is no extradata. But the WMA
+         * codecs require extradata, so we provide our own fake extradata.
+         *
+         * First, check that there really was no extradata in the header. If
+         * there was, then try to use, after asking the the user to provide a
+         * sample of this unusual file.
+         */
+        if (st->codec->extradata_size != 0) {
+            /* Surprise, surprise: We *did* get some extradata. No idea
+             * if it will work, but just go on and try it, after asking
+             * the user for a sample.
+             */
+            av_log(s, AV_LOG_WARNING, "unexpected extradata (%d bytes)\n",
+                                  st->codec->extradata_size);
+            av_log_ask_for_sample(s, NULL);
+        } else {
+            st->codec->extradata_size = 6;
+            st->codec->extradata      = av_mallocz(6 + FF_INPUT_BUFFER_PADDING_SIZE);
+            if (!st->codec->extradata)
+                return AVERROR(ENOMEM);
+
+            /* setup extradata with our experimentally obtained value */
+            st->codec->extradata[4] = 31;
+        }
+    }
+
+    /* set the sample rate */
+    av_set_pts_info(st, 64, 1, st->codec->sample_rate);
+
+    /* parse the remaining RIFF chunks */
+    for (;;) {
+        if (pb->eof_reached)
+            return -1;
+        /* read next chunk tag */
+        tag = avio_rl32(pb);
+        size = avio_rl32(pb);
+        if (tag == MKTAG('d', 'a', 't', 'a')) {
+            /* We assume that the data chunk comes last. */
+            break;
+        } else if (tag == MKTAG('d','p','d','s')) {
+            /* Quoting the MSDN xWMA docs on the dpds chunk: "Contains the
+             * decoded packet cumulative data size array, each element is the
+             * number of bytes accumulated after the corresponding xWMA packet
+             * is decoded in order"
+             *
+             * Each packet has size equal to st->codec->block_align, which in
+             * all cases I saw so far was always 2230. Thus, we can use the
+             * dpds data to compute a seeking index.
+             */
+
+            /* Error out if there is more than one dpds chunk. */
+            if (dpds_table) {
+                av_log(s, AV_LOG_ERROR, "two dpds chunks present\n");
+                return -1;
+            }
+
+            /* Compute the number of entries in the dpds chunk. */
+            if (size & 3) {  /* Size should be divisible by four */
+                av_log(s, AV_LOG_WARNING, "dpds chunk size "PRId64" not divisible by 4\n", size);
+            }
+            dpds_table_size = size / 4;
+            if (dpds_table_size == 0 || dpds_table_size >= INT_MAX / 4) {
+                av_log(s, AV_LOG_ERROR, "dpds chunk size "PRId64" invalid\n", size);
+                return -1;
+            }
+
+            /* Allocate some temporary storage to keep the dpds data around.
+             * for processing later on.
+             */
+            dpds_table = av_malloc(dpds_table_size * sizeof(uint32_t));
+            if (!dpds_table) {
+                return AVERROR(ENOMEM);
+            }
+
+            for (i = 0; i < dpds_table_size; ++i) {
+                dpds_table[i] = avio_rl32(pb);
+                size -= 4;
+            }
+        }
+        avio_skip(pb, size);
+    }
+
+    /* Determine overall data length */
+    if (size < 0)
+        return -1;
+    if (!size) {
+        xwma->data_end = INT64_MAX;
+    } else
+        xwma->data_end = avio_tell(pb) + size;
+
+
+    if (dpds_table && dpds_table_size) {
+        int64_t cur_pos;
+        const uint32_t bytes_per_sample
+                = (st->codec->channels * st->codec->bits_per_coded_sample) >> 3;
+
+        /* Estimate the duration from the total number of output bytes. */
+        const uint64_t total_decoded_bytes = dpds_table[dpds_table_size - 1];
+        st->duration = total_decoded_bytes / bytes_per_sample;
+
+        /* Use the dpds data to build a seek table.  We can only do this after
+         * we know the offset to the data chunk, as we need that to determine
+         * the actual offset to each input block.
+         * Note: If we allowed ourselves to assume that the data chunk always
+         * follows immediately after the dpds block, we could of course guess
+         * the data block's start offset already while reading the dpds chunk.
+         * I decided against that, just in case other chunks ever are
+         * discovered.
+         */
+        cur_pos = avio_tell(pb);
+        for (i = 0; i < dpds_table_size; ++i) {
+            /* From the number of output bytes that would accumulate in the
+             * output buffer after decoding the first (i+1) packets, we compute
+             * an offset / timestamp pair.
+             */
+            av_add_index_entry(st,
+                               cur_pos + (i+1) * st->codec->block_align, /* pos */
+                               dpds_table[i] / bytes_per_sample,         /* timestamp */
+                               st->codec->block_align,                   /* size */
+                               0,                                        /* duration */
+                               AVINDEX_KEYFRAME);
+        }
+    } else if (st->codec->bit_rate) {
+        /* No dpds chunk was present (or only an empty one), so estimate
+         * the total duration using the average bits per sample and the
+         * total data length.
+         */
+        st->duration = (size<<3) * st->codec->sample_rate / st->codec->bit_rate;
+    }
+
+    av_free(dpds_table);
+
+    return 0;
+}
+
+static int xwma_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+    int ret, size;
+    int64_t left;
+    AVStream *st;
+    XWMAContext *xwma = s->priv_data;
+
+    st = s->streams[0];
+
+    left = xwma->data_end - avio_tell(s->pb);
+    if (left <= 0) {
+        return AVERROR_EOF;
+    }
+
+    /* read a single block; the default block size is 2230. */
+    size = (st->codec->block_align > 1) ? st->codec->block_align : 2230;
+    size = FFMIN(size, left);
+
+    ret  = av_get_packet(s->pb, pkt, size);
+    if (ret < 0)
+        return ret;
+
+    pkt->stream_index = 0;
+    return ret;
+}
+
+AVInputFormat ff_xwma_demuxer = {
+    "xwma",
+    NULL_IF_CONFIG_SMALL("Microsoft xWMA"),
+    sizeof(XWMAContext),
+    xwma_probe,
+    xwma_read_header,
+    xwma_read_packet,
+};