avformat: add CRI ADX format demuxer

Changelog

@@ -102,6 +102,7 @@ easier to use. The changes are:
 - Discworld II BMV decoding support
 - VBLE Decoder
 - OS X Video Decoder Acceleration (VDA) support
+- CRI ADX audio format demuxer
 
 
 version 0.7:

doc/general.texi

@@ -67,6 +67,8 @@ 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 CRI ADX                   @tab   @tab X
+    @tab Audio-only format used in console video games.
 @item Discworld II BMV          @tab   @tab X
 @item Interplay C93             @tab   @tab X
     @tab Used in the game Cyberia from Interplay.

libavcodec/Makefile

@@ -528,6 +528,7 @@ OBJS-$(CONFIG_ADPCM_YAMAHA_ENCODER)       += adpcmenc.o adpcm_data.o
 
 # libavformat dependencies
 OBJS-$(CONFIG_ADTS_MUXER)              += mpeg4audio.o
+OBJS-$(CONFIG_ADX_DEMUXER)             += adx.o
 OBJS-$(CONFIG_CAF_DEMUXER)             += mpeg4audio.o mpegaudiodata.o
 OBJS-$(CONFIG_DV_DEMUXER)              += dvdata.o
 OBJS-$(CONFIG_DV_MUXER)                += dvdata.o

libavformat/Makefile

@@ -21,6 +21,7 @@ OBJS-$(CONFIG_A64_MUXER)                 += a64.o
 OBJS-$(CONFIG_AAC_DEMUXER)               += aacdec.o rawdec.o
 OBJS-$(CONFIG_AC3_DEMUXER)               += ac3dec.o rawdec.o
 OBJS-$(CONFIG_AC3_MUXER)                 += rawenc.o
+OBJS-$(CONFIG_ADX_DEMUXER)               += adxdec.o
 OBJS-$(CONFIG_ADTS_MUXER)                += adtsenc.o
 OBJS-$(CONFIG_AEA_DEMUXER)               += aea.o pcm.o
 OBJS-$(CONFIG_AIFF_DEMUXER)              += aiffdec.o riff.o pcm.o

libavformat/adxdec.c

@@ -0,0 +1,110 @@
+/*
+ * Copyright (c) 2011 Justin Ruggles
+ *
+ * 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
+ * CRI ADX demuxer
+ */
+
+#include "libavutil/intreadwrite.h"
+#include "libavcodec/adx.h"
+#include "avformat.h"
+
+#define BLOCK_SIZE    18
+#define BLOCK_SAMPLES 32
+
+typedef struct ADXDemuxerContext {
+    int header_size;
+} ADXDemuxerContext;
+
+static int adx_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+    ADXDemuxerContext *c = s->priv_data;
+    AVCodecContext *avctx = s->streams[0]->codec;
+    int ret, size;
+
+    size = BLOCK_SIZE * avctx->channels;
+
+    pkt->pos = avio_tell(s->pb);
+    pkt->stream_index = 0;
+
+    ret = av_get_packet(s->pb, pkt, size);
+    if (ret != size) {
+        av_free_packet(pkt);
+        return ret < 0 ? ret : AVERROR(EIO);
+    }
+    if (AV_RB16(pkt->data) & 0x8000) {
+        av_free_packet(pkt);
+        return AVERROR_EOF;
+    }
+    pkt->size     = size;
+    pkt->duration = 1;
+    pkt->pts      = (pkt->pos - c->header_size) / size;
+
+    return 0;
+}
+
+static int adx_read_header(AVFormatContext *s, AVFormatParameters *ap)
+{
+    ADXDemuxerContext *c = s->priv_data;
+    AVCodecContext *avctx;
+    int ret;
+
+    AVStream *st = avformat_new_stream(s, NULL);
+    if (!st)
+        return AVERROR(ENOMEM);
+    avctx = s->streams[0]->codec;
+
+    if (avio_rb16(s->pb) != 0x8000)
+        return AVERROR_INVALIDDATA;
+    c->header_size = avio_rb16(s->pb) + 4;
+    avio_seek(s->pb, -4, SEEK_CUR);
+
+    avctx->extradata = av_mallocz(c->header_size + FF_INPUT_BUFFER_PADDING_SIZE);
+    if (!avctx->extradata)
+        return AVERROR(ENOMEM);
+    if (avio_read(s->pb, avctx->extradata, c->header_size) < c->header_size) {
+        av_freep(&avctx->extradata);
+        return AVERROR(EIO);
+    }
+    avctx->extradata_size = c->header_size;
+
+    ret = ff_adx_decode_header(avctx, avctx->extradata, avctx->extradata_size,
+                               &c->header_size, NULL);
+    if (ret)
+        return ret;
+
+    st->codec->codec_type  = AVMEDIA_TYPE_AUDIO;
+    st->codec->codec_id    = s->iformat->value;
+
+    av_set_pts_info(st, 64, BLOCK_SAMPLES, avctx->sample_rate);
+
+    return 0;
+}
+
+AVInputFormat ff_adx_demuxer = {
+    .name           = "adx",
+    .long_name      = NULL_IF_CONFIG_SMALL("CRI ADX"),
+    .priv_data_size = sizeof(ADXDemuxerContext),
+    .read_header    = adx_read_header,
+    .read_packet    = adx_read_packet,
+    .extensions     = "adx",
+    .value          = CODEC_ID_ADPCM_ADX,
+};

libavformat/allformats.c

@@ -52,6 +52,7 @@ void av_register_all(void)
     REGISTER_DEMUXER  (AAC, aac);
     REGISTER_MUXDEMUX (AC3, ac3);
     REGISTER_MUXER    (ADTS, adts);
+    REGISTER_DEMUXER  (ADX, adx);
     REGISTER_DEMUXER  (AEA, aea);
     REGISTER_MUXDEMUX (AIFF, aiff);
     REGISTER_MUXDEMUX (AMR, amr);

libavformat/version.h

@@ -24,7 +24,7 @@
 #include "libavutil/avutil.h"
 
 #define LIBAVFORMAT_VERSION_MAJOR 53
-#define LIBAVFORMAT_VERSION_MINOR 15
+#define LIBAVFORMAT_VERSION_MINOR 16
 #define LIBAVFORMAT_VERSION_MICRO  0
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \