Add libmodplug support.

Changelog

@@ -61,6 +61,7 @@ easier to use. The changes are:
 - Apple ProRes decoder
 - CELT in Ogg demuxing
 - G.723.1 demuxer and decoder
+- libmodplug support (--enable-libmodplug)
 
 
 version 0.8:

MAINTAINERS

@@ -287,6 +287,7 @@ Muxers/Demuxers:
   img2.c                                Michael Niedermayer
   iss.c                                 Stefan Gehrer
   jvdec.c                               Peter Ross
+  libmodplug.c                          Clément Bœsch
   libnut.c                              Oded Shimon
   lmlm4.c                               Ivo van Poorten
   lxfdec.c                              Tomas Härdin

configure

@@ -176,6 +176,7 @@ External library support:
   --enable-libfaac         enable FAAC support via libfaac [no]
   --enable-libfreetype     enable libfreetype [no]
   --enable-libgsm          enable GSM support via libgsm [no]
+  --enable-libmodplug      enable ModPlug via libmodplug [no]
   --enable-libmp3lame      enable MP3 encoding via libmp3lame [no]
   --enable-libnut          enable NUT (de)muxing via libnut,
                            native (de)muxer exists [no]
@@ -1003,6 +1004,7 @@ CONFIG_LIST="
     libfaac
     libfreetype
     libgsm
+    libmodplug
     libmp3lame
     libnut
     libopencore_amrnb
@@ -1495,6 +1497,7 @@ libgsm_decoder_deps="libgsm"
 libgsm_encoder_deps="libgsm"
 libgsm_ms_decoder_deps="libgsm"
 libgsm_ms_encoder_deps="libgsm"
+libmodplug_decode_deps="libmodplug"
 libmp3lame_encoder_deps="libmp3lame"
 libopencore_amrnb_decoder_deps="libopencore_amrnb"
 libopencore_amrnb_encoder_deps="libopencore_amrnb"
@@ -3026,6 +3029,7 @@ enabled libdirac   && require_pkg_config dirac                          \
 enabled libfaac    && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
 enabled libfreetype && require_pkg_config freetype2 "ft2build.h freetype/freetype.h" FT_Init_FreeType
 enabled libgsm     && require  libgsm gsm/gsm.h gsm_create -lgsm
+enabled libmodplug && require  libmodplug libmodplug/modplug.h ModPlug_Load -lmodplug
 enabled libmp3lame && require  "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
 enabled libnut     && require  libnut libnut.h nut_demuxer_init -lnut
 enabled libopencore_amrnb  && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
@@ -3352,6 +3356,7 @@ echo "libdirac enabled          ${libdirac-no}"
 echo "libfaac enabled           ${libfaac-no}"
 echo "libaacplus enabled        ${libaacplus-no}"
 echo "libgsm enabled            ${libgsm-no}"
+echo "libmodplug enabled        ${libmodplug-no}"
 echo "libmp3lame enabled        ${libmp3lame-no}"
 echo "libnut enabled            ${libnut-no}"
 echo "libopencore-amrnb support ${libopencore_amrnb-no}"

libavformat/Makefile

@@ -324,6 +324,7 @@ OBJS-$(CONFIG_YUV4MPEGPIPE_MUXER)        += yuv4mpeg.o
 OBJS-$(CONFIG_YUV4MPEGPIPE_DEMUXER)      += yuv4mpeg.o
 
 # external libraries
+OBJS-$(CONFIG_LIBMODPLUG_DEMUXER)        += libmodplug.o
 OBJS-$(CONFIG_LIBNUT_DEMUXER)            += libnut.o riff.o
 OBJS-$(CONFIG_LIBNUT_MUXER)              += libnut.o riff.o
 

libavformat/allformats.c

@@ -242,6 +242,9 @@ void av_register_all(void)
     REGISTER_MUXDEMUX (YUV4MPEGPIPE, yuv4mpegpipe);
 
     /* external libraries */
+#if CONFIG_LIBMODPLUG
+    REGISTER_DEMUXER  (LIBMODPLUG, libmodplug);
+#endif
     REGISTER_MUXDEMUX (LIBNUT, libnut);
 
     /* protocols */

libavformat/libmodplug.c

@@ -0,0 +1,110 @@
+/*
+ * 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
+* ModPlug demuxer
+* @todo ModPlug options (noise reduction, reverb, bass boost, ...)
+* @todo metadata
+*/
+
+#include <libmodplug/modplug.h>
+#include "avformat.h"
+
+typedef struct ModPlugContext {
+    ModPlugFile *f;
+    uint8_t buf[5 * 1<<20]; ///< input file content, 5M max
+} ModPlugContext;
+
+static int modplug_read_header(AVFormatContext *s, AVFormatParameters *ap)
+{
+    AVStream *st;
+    AVIOContext *pb = s->pb;
+    ModPlug_Settings settings;
+    ModPlugContext *modplug = s->priv_data;
+
+    int sz = avio_read(pb, modplug->buf, sizeof modplug->buf);
+
+    ModPlug_GetSettings(&settings);
+    settings.mChannels       = 2;
+    settings.mBits           = 16;
+    settings.mFrequency      = 44100;
+    settings.mResamplingMode = MODPLUG_RESAMPLE_FIR; // best quality
+    settings.mLoopCount      = 0; // prevents looping forever
+    ModPlug_SetSettings(&settings);
+
+    modplug->f = ModPlug_Load(modplug->buf, sz);
+    if (!modplug->f)
+        return AVERROR_INVALIDDATA;
+
+    st = av_new_stream(s, 0);
+    if (!st)
+        return AVERROR(ENOMEM);
+    av_set_pts_info(st, 64, 1, 1000);
+    st->duration = ModPlug_GetLength(modplug->f);
+    st->codec->codec_type  = AVMEDIA_TYPE_AUDIO;
+    st->codec->codec_id    = CODEC_ID_PCM_S16LE;
+    st->codec->channels    = settings.mChannels;
+    st->codec->sample_rate = settings.mFrequency;
+    return 0;
+}
+
+static int modplug_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+    int ret, n;
+    ModPlugContext *modplug = s->priv_data;
+    uint8_t buf[512];
+
+    n = ModPlug_Read(modplug->f, buf, sizeof buf);
+    if (n <= 0)
+        return AVERROR(EIO);
+
+    ret = av_new_packet(pkt, n);
+    if (ret)
+        return ret;
+    pkt->pts  = pkt->dts = AV_NOPTS_VALUE;
+    pkt->size = n;
+    memcpy(pkt->data, buf, n);
+    return 0;
+}
+
+static int modplug_read_close(AVFormatContext *s)
+{
+    ModPlugContext *modplug = s->priv_data;
+    ModPlug_Unload(modplug->f);
+    return 0;
+}
+
+static int modplug_read_seek(AVFormatContext *s, int stream_idx, int64_t ts, int flags)
+{
+    const ModPlugContext *modplug = s->priv_data;
+    ModPlug_Seek(modplug->f, (int)ts);
+    return 0;
+}
+
+AVInputFormat ff_libmodplug_demuxer = {
+    .name           = "libmodplug",
+    .long_name      = NULL_IF_CONFIG_SMALL("ModPlug demuxer"),
+    .priv_data_size = sizeof(ModPlugContext),
+    .read_header    = modplug_read_header,
+    .read_packet    = modplug_read_packet,
+    .read_close     = modplug_read_close,
+    .read_seek      = modplug_read_seek,
+    .extensions     = "669,abc,amf,ams,dbm,dmf,dsm,far,it,mdl,med,mid,mod,mt2,mtm,okt,psm,ptm,s3m,stm,ult,umx,xm"
+                      ",itgz,itr,itz,mdgz,mdr,mdz,s3gz,s3r,s3z,xmgz,xmr,xmz", // compressed mods
+};

libavformat/version.h

@@ -24,7 +24,7 @@
 #include "libavutil/avutil.h"
 
 #define LIBAVFORMAT_VERSION_MAJOR 53
-#define LIBAVFORMAT_VERSION_MINOR 13
+#define LIBAVFORMAT_VERSION_MINOR 14
 #define LIBAVFORMAT_VERSION_MICRO  0
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \