Electronic Arts Game Multimedia format demuxer (WVE/UV2/etc.)

Originally committed as revision 3600 to svn://svn.ffmpeg.org/ffmpeg/trunk

Changelog

@@ -4,6 +4,7 @@ version <next>
 - Sierra Online audio file demuxer and decoder
 - Apple QuickDraw (qdrw) video decoder
 - Creative ADPCM audio decoder
+- Electronic Arts Multimedia (WVE/UV2/etc.) file demuxer
 
 version 0.4.9-pre1:
 

doc/ffmpeg-doc.texi

@@ -687,6 +687,8 @@ library:
 @tab .sol files used in Sierra Online games
 @item Matroska         @tab    @tab X
 @end multitable
+@item Electronic Arts Multimedia    @tab    @tab X
+@tab used in various EA games; files have extensions like WVE and UV2
 
 @code{X} means that the encoding (resp. decoding) is supported.
 

libavformat/Makefile

@@ -16,7 +16,7 @@ OBJS+=mpeg.o mpegts.o mpegtsenc.o ffm.o crc.o img.o img2.o raw.o rm.o \
       avienc.o avidec.o wav.o swf.o au.o gif.o mov.o mpjpeg.o dv.o \
       yuv4mpeg.o 4xm.o flvenc.o flvdec.o movenc.o psxstr.o idroq.o ipmovie.o \
       nut.o wc3movie.o mp3.o westwood.o segafilm.o idcin.o flic.o \
-      sierravmd.o matroska.o sol.o
+      sierravmd.o matroska.o sol.o electronicarts.o
 
 ifeq ($(CONFIG_RISKY),yes)
 OBJS+= asf.o

libavformat/allformats.c

@@ -105,6 +105,7 @@ void av_register_all(void)
     nut_init();
     matroska_init();
     sol_init();
+    ea_init();
 
 #ifdef CONFIG_ENCODERS
     /* image formats */

libavformat/avformat.h

@@ -502,6 +502,9 @@ int matroska_init(void);
 /* sol.c */
 int sol_init(void);
 
+/* electronicarts.c */
+int ea_init(void);
+
 #include "rtp.h"
 
 #include "rtsp.h"

libavformat/electronicarts.c

+/* Electronic Arts Multimedia File Demuxer
+ * Copyright (c) 2004  The ffmpeg Project
+ *
+ * This library 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 of the License, or (at your option) any later version.
+ *
+ * This library 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 this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+/**
+ * @file electronicarts.c
+ * Electronic Arts Multimedia file demuxer (WVE/UV2/etc.)
+ * by Robin Kay (komadori at gekkou.co.uk)
+ */
+
+#include "avformat.h"
+
+#define SCHl_TAG MKTAG('S', 'C', 'H', 'l')
+#define PT00_TAG MKTAG('P', 'T', 0x0, 0x0)
+#define SCDl_TAG MKTAG('S', 'C', 'D', 'l')
+#define pIQT_TAG MKTAG('p', 'I', 'Q', 'T')
+#define SCEl_TAG MKTAG('S', 'C', 'E', 'l')
+#define _TAG MKTAG('', '', '', '')
+
+#define EA_SAMPLE_RATE 22050
+#define EA_BITS_PER_SAMPLE 16
+#define EA_PREAMBLE_SIZE 8
+
+typedef struct EaDemuxContext {
+    int width;
+    int height;
+    int video_stream_index;
+    int track_count;
+
+    int audio_stream_index;
+    int audio_frame_counter;
+
+    int64_t audio_pts;
+    int64_t video_pts;
+    int video_pts_inc;
+    float fps;
+
+    int num_channels;
+    int num_samples;
+    int compression_type;
+} EaDemuxContext;
+
+static uint32_t read_arbitary(ByteIOContext *pb) {
+    uint8_t size, byte;
+    int i;
+    uint32_t word;
+
+    size = get_byte(pb);
+
+    word = 0;
+    for (i = 0; i < size; i++) {
+        byte = get_byte(pb);
+        word <<= 8;
+        word |= byte;
+    }
+
+    return word;
+}
+
+/*
+ * Process WVE file header
+ * Returns 1 if the WVE file is valid and successfully opened, 0 otherwise
+ */
+static int process_ea_header(AVFormatContext *s) {
+    int inHeader;
+    uint32_t blockid, size;
+    EaDemuxContext *ea = (EaDemuxContext *)s->priv_data;
+    ByteIOContext *pb = &s->pb;
+
+    if (get_buffer(pb, (void*)&blockid, 4) != 4) {
+        return 0;
+    }
+    if (le2me_32(blockid) != SCHl_TAG) {
+        return 0;
+    }
+
+    if (get_buffer(pb, (void*)&size, 4) != 4) {
+        return 0;
+    }
+    size = le2me_32(size);
+
+    if (get_buffer(pb, (void*)&blockid, 4) != 4) {
+        return 0;
+    }
+    if (le2me_32(blockid) != PT00_TAG) {
+        av_log (s, AV_LOG_ERROR, "PT header missing\n");
+        return 0;
+    }
+
+    inHeader = 1;
+    while (inHeader) {
+        int inSubheader;
+        uint8_t byte;
+        byte = get_byte(pb) & 0xFF;
+
+        switch (byte) {
+        case 0xFD:
+            av_log (s, AV_LOG_INFO, "entered audio subheader\n");
+            inSubheader = 1;
+            while (inSubheader) {
+                uint8_t subbyte;
+                subbyte = get_byte(pb) & 0xFF;
+
+                switch (subbyte) {
+                case 0x82:
+                    ea->num_channels = read_arbitary(pb);
+                    av_log (s, AV_LOG_INFO, "num_channels (element 0x82) set to 0x%08x\n", ea->num_channels);
+                    break;
+                case 0x83:
+                    ea->compression_type = read_arbitary(pb);
+                    av_log (s, AV_LOG_INFO, "compression_type (element 0x83) set to 0x%08x\n", ea->compression_type);
+                    break;
+                case 0x85:
+                    ea->num_samples = read_arbitary(pb);
+                    av_log (s, AV_LOG_INFO, "num_samples (element 0x85) set to 0x%08x\n", ea->num_samples);
+                    break;
+                case 0x8A:
+                    av_log (s, AV_LOG_INFO, "element 0x%02x set to 0x%08x\n", subbyte, read_arbitary(pb));
+                    av_log (s, AV_LOG_INFO, "exited audio subheader\n");
+                    inSubheader = 0;
+                    break;
+                default:
+                    av_log (s, AV_LOG_INFO, "element 0x%02x set to 0x%08x\n", subbyte, read_arbitary(pb));
+                    break;
+                }
+            }
+            break;
+        case 0xFF:
+            av_log (s, AV_LOG_INFO, "end of header block reached\n");
+            inHeader = 0;
+            break;
+        default:
+            av_log (s, AV_LOG_INFO, "header element 0x%02x set to 0x%08x\n", byte, read_arbitary(pb));
+            break;
+        }
+    }
+
+    if ((ea->num_channels != 2) || (ea->compression_type != 7)) {
+        av_log (s, AV_LOG_ERROR, "unsupported stream type\n");
+        return 0;
+    }
+
+    /* skip to the start of the data */
+    url_fseek(pb, size, SEEK_SET);
+
+    return 1;
+}
+
+
+static int ea_probe(AVProbeData *p)
+{
+    if (p->buf_size < 4)
+        return 0;
+
+    if (LE_32(&p->buf[0]) != SCHl_TAG)
+        return 0;
+
+    return AVPROBE_SCORE_MAX;
+}
+
+static int ea_read_header(AVFormatContext *s,
+                          AVFormatParameters *ap)
+{
+    EaDemuxContext *ea = (EaDemuxContext *)s->priv_data;
+    AVStream *st;
+
+    if (!process_ea_header(s))
+        return AVERROR_IO;
+
+#if 0
+    /* initialize the video decoder stream */
+    st = av_new_stream(s, 0);
+    if (!st)
+        return AVERROR_NOMEM;
+    av_set_pts_info(st, 33, 1, 90000);
+    ea->video_stream_index = st->index;
+    st->codec.codec_type = CODEC_TYPE_VIDEO;
+    st->codec.codec_id = CODEC_ID_EA_MJPEG;
+    st->codec.codec_tag = 0;  /* no fourcc */
+#endif    
+
+    /* initialize the audio decoder stream */
+    st = av_new_stream(s, 0);
+    if (!st)
+        return AVERROR_NOMEM;
+    av_set_pts_info(st, 33, 1, EA_SAMPLE_RATE);
+    st->codec.codec_type = CODEC_TYPE_AUDIO;
+    st->codec.codec_id = CODEC_ID_ADPCM_EA;
+    st->codec.codec_tag = 0;  /* no tag */
+    st->codec.channels = ea->num_channels;
+    st->codec.sample_rate = EA_SAMPLE_RATE;
+    st->codec.bits_per_sample = EA_BITS_PER_SAMPLE;
+    st->codec.bit_rate = st->codec.channels * st->codec.sample_rate *
+        st->codec.bits_per_sample / 4;
+    st->codec.block_align = st->codec.channels * st->codec.bits_per_sample;
+
+    ea->audio_stream_index = st->index;
+    ea->audio_frame_counter = 0;
+
+    return 1;
+}
+
+static int ea_read_packet(AVFormatContext *s,
+                          AVPacket *pkt)
+{
+    EaDemuxContext *ea = s->priv_data;
+    ByteIOContext *pb = &s->pb;
+    int ret = 0;
+    int packet_read = 0;
+    unsigned char preamble[EA_PREAMBLE_SIZE];
+    unsigned int chunk_type, chunk_size;
+
+    while (!packet_read) {
+
+        if (get_buffer(pb, preamble, EA_PREAMBLE_SIZE) != EA_PREAMBLE_SIZE)
+            return AVERROR_IO;
+        chunk_type = LE_32(&preamble[0]);
+        chunk_size = LE_32(&preamble[4]) - EA_PREAMBLE_SIZE;
+
+        switch (chunk_type) {
+        /* audio data */
+        case SCDl_TAG:
+            if (av_new_packet(pkt, chunk_size))
+                ret = AVERROR_IO;
+            else {
+                ret = get_buffer(pb, pkt->data, chunk_size);
+                if (ret != chunk_size)
+                    ret = AVERROR_IO;
+                else {
+                    pkt->stream_index = ea->audio_stream_index;
+                    pkt->pts = 90000;
+                    pkt->pts *= ea->audio_frame_counter;
+                    pkt->pts /= EA_SAMPLE_RATE;
+
+                    /* 2 samples/byte, 1 or 2 samples per frame depending 
+                     * on stereo; chunk also has 12-byte header */
+                    ea->audio_frame_counter += ((chunk_size - 12) * 2) /
+                        ea->num_channels;
+                }
+            }
+
+            packet_read = 1;
+            break;
+
+        /* ending tag */
+        case SCEl_TAG:
+            ret = AVERROR_IO;
+            packet_read = 1;
+            break;
+
+        default:
+            url_fseek(pb, chunk_size, SEEK_CUR);
+            break;
+        }
+
+        /* ending packet */
+        if (chunk_type == SCEl_TAG) {
+        }
+    }
+
+    return ret;
+}
+
+static int ea_read_close(AVFormatContext *s)
+{
+//    EaDemuxContext *ea = (EaDemuxContext *)s->priv_data;
+
+    return 0;
+}
+
+static AVInputFormat ea_iformat = {
+    "ea",
+    "Electronic Arts Multimedia Format",
+    sizeof(EaDemuxContext),
+    ea_probe,
+    ea_read_header,
+    ea_read_packet,
+    ea_read_close,
+};
+
+int ea_init(void)
+{
+    av_register_input_format(&ea_iformat);
+    return 0;
+}