initial commit for Id RoQ and Interplay MVE multimedia subsystems

Originally committed as revision 2195 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/Makefile

@@ -17,7 +17,8 @@ OBJS= common.o utils.o mem.o allcodecs.o \
       mpeg12.o mpegaudiodec.o pcm.o simple_idct.o \
       ratecontrol.o adpcm.o eval.o dv.o error_resilience.o \
       fft.o mdct.o mace.o huffyuv.o cyuv.o opts.o raw.o h264.o golomb.o \
-      vp3.o asv1.o 4xm.o cabac.o ffv1.o ra144.o ra288.o vcr1.o cljr.o
+      vp3.o asv1.o 4xm.o cabac.o ffv1.o ra144.o ra288.o vcr1.o cljr.o \
+      roqvideo.o dpcm.o interplayvideo.o
 
 ifeq ($(AMR_NB),yes)
 ifeq ($(AMR_NB_FIXED),yes)

libavcodec/allcodecs.c

@@ -121,11 +121,15 @@ void avcodec_register_all(void)
     register_avcodec(&cljr_decoder);
     register_avcodec(&fourxm_decoder);
     register_avcodec(&mdec_decoder);
+    register_avcodec(&roq_decoder);
+    register_avcodec(&interplay_video_decoder);
 #ifdef CONFIG_AC3
     register_avcodec(&ac3_decoder);
 #endif
     register_avcodec(&ra_144_decoder);
     register_avcodec(&ra_288_decoder);
+    register_avcodec(&roq_dpcm_decoder);
+    register_avcodec(&interplay_dpcm_decoder);
 #endif /* CONFIG_DECODERS */
 
 #ifdef AMR_NB

libavcodec/avcodec.h

@@ -66,6 +66,8 @@ enum CodecID {
     CODEC_ID_VCR1,
     CODEC_ID_CLJR,
     CODEC_ID_MDEC,
+    CODEC_ID_ROQ,
+    CODEC_ID_INTERPLAY_VIDEO,
 
     /* various pcm "codecs" */
     CODEC_ID_PCM_S16LE,
@@ -88,6 +90,10 @@ enum CodecID {
     /* RealAudio codecs*/
     CODEC_ID_RA_144,
     CODEC_ID_RA_288,
+
+    /* various DPCM codecs */
+    CODEC_ID_ROQ_DPCM,
+    CODEC_ID_INTERPLAY_DPCM,
 };
 
 enum CodecType {
@@ -1347,8 +1353,12 @@ extern AVCodec cljr_decoder;
 extern AVCodec ffv1_decoder;
 extern AVCodec fourxm_decoder;
 extern AVCodec mdec_decoder;
+extern AVCodec roq_decoder;
+extern AVCodec interplay_video_decoder;
 extern AVCodec ra_144_decoder;
 extern AVCodec ra_288_decoder;
+extern AVCodec roq_dpcm_decoder;
+extern AVCodec interplay_dpcm_decoder;
 
 /* pcm codecs */
 #define PCM_CODEC(id, name) \

libavcodec/dpcm.c

+/*
+ * Assorted DPCM codecs
+ * Copyright (c) 2003 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: dpcm.c
+ * Assorted DPCM (differential pulse code modulation) audio codecs
+ * by Mike Melanson (melanson@pcisys.net)
+ * for more information on the specific data formats, visit:
+ *   http://www.pcisys.net/~melanson/codecs/simpleaudio.html
+ */
+
+#include "avcodec.h"
+
+typedef struct DPCMContext {
+    int channels;
+    short roq_square_array[256];
+    int last_delta[2];
+} DPCMContext;
+
+#define SATURATE_S16(x)  if (x < -32768) x = -32768; \
+  else if (x > 32767) x = 32767;
+#define SE_16BIT(x)  if (x & 0x8000) x -= 0x10000;
+#define LE_16(x)  ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
+#define LE_32(x)  ((((uint8_t*)(x))[3] << 24) | \
+                   (((uint8_t*)(x))[2] << 16) | \
+                   (((uint8_t*)(x))[1] << 8) | \
+                    ((uint8_t*)(x))[0])
+
+static int interplay_delta_table[] = {
+         0,      1,      2,      3,      4,      5,      6,      7,
+         8,      9,     10,     11,     12,     13,     14,     15,
+        16,     17,     18,     19,     20,     21,     22,     23,
+        24,     25,     26,     27,     28,     29,     30,     31,
+        32,     33,     34,     35,     36,     37,     38,     39,
+        40,     41,     42,     43,     47,     51,     56,     61,
+        66,     72,     79,     86,     94,    102,    112,    122,
+       133,    145,    158,    173,    189,    206,    225,    245,
+       267,    292,    318,    348,    379,    414,    452,    493,
+       538,    587,    640,    699,    763,    832,    908,    991,
+      1081,   1180,   1288,   1405,   1534,   1673,   1826,   1993,
+      2175,   2373,   2590,   2826,   3084,   3365,   3672,   4008,
+      4373,   4772,   5208,   5683,   6202,   6767,   7385,   8059,
+      8794,   9597,  10472,  11428,  12471,  13609,  14851,  16206,
+     17685,  19298,  21060,  22981,  25078,  27367,  29864,  32589,
+    -29973, -26728, -23186, -19322, -15105, -10503,  -5481,     -1,
+         1,      1,   5481,  10503,  15105,  19322,  23186,  26728,
+     29973, -32589, -29864, -27367, -25078, -22981, -21060, -19298,
+    -17685, -16206, -14851, -13609, -12471, -11428, -10472,  -9597,
+     -8794,  -8059,  -7385,  -6767,  -6202,  -5683,  -5208,  -4772,
+     -4373,  -4008,  -3672,  -3365,  -3084,  -2826,  -2590,  -2373,
+     -2175,  -1993,  -1826,  -1673,  -1534,  -1405,  -1288,  -1180,
+     -1081,   -991,   -908,   -832,   -763,   -699,   -640,   -587,
+      -538,   -493,   -452,   -414,   -379,   -348,   -318,   -292,
+      -267,   -245,   -225,   -206,   -189,   -173,   -158,   -145,
+      -133,   -122,   -112,   -102,    -94,    -86,    -79,    -72,
+       -66,    -61,    -56,    -51,    -47,    -43,    -42,    -41,
+       -40,    -39,    -38,    -37,    -36,    -35,    -34,    -33,
+       -32,    -31,    -30,    -29,    -28,    -27,    -26,    -25,
+       -24,    -23,    -22,    -21,    -20,    -19,    -18,    -17,
+       -16,    -15,    -14,    -13,    -12,    -11,    -10,     -9,
+        -8,     -7,     -6,     -5,     -4,     -3,     -2,     -1
+
+};
+
+static int dpcm_decode_init(AVCodecContext *avctx)
+{
+    DPCMContext *s = avctx->priv_data;
+    int i;
+    short square;
+
+    s->channels = avctx->channels;
+
+    switch(avctx->codec->id) {
+
+    case CODEC_ID_ROQ_DPCM:
+        /* initialize square table */
+        for (i = 0; i < 128; i++) {
+            square = i * i;
+            s->roq_square_array[i] = square;
+            s->roq_square_array[i + 128] = -square;
+        }
+        break;
+
+    default:
+        break;
+    }
+
+    return 0;
+}
+
+static int dpcm_decode_frame(AVCodecContext *avctx,
+                             void *data, int *data_size,
+                             uint8_t *buf, int buf_size)
+{
+    DPCMContext *s = avctx->priv_data;
+    int in, out = 0;
+    int i;
+    int predictor[2];
+    int channel_number = 0;
+    short *output_samples = data;
+    int sequence_number;
+
+    switch(avctx->codec->id) {
+
+    case CODEC_ID_ROQ_DPCM:
+        if (s->channels == 1)
+            predictor[0] = LE_16(&buf[6]);
+        else {
+            predictor[0] = buf[7] << 8;
+            predictor[1] = buf[6] << 8;
+        }
+        SE_16BIT(predictor[0]);
+        SE_16BIT(predictor[1]);
+
+        /* decode the samples */
+        for (in = 8, out = 0; in < buf_size; in++, out++) {
+            predictor[channel_number] += s->roq_square_array[buf[in]];
+            SATURATE_S16(predictor[channel_number]);
+            output_samples[out] = predictor[channel_number];
+
+            /* toggle channel */
+            channel_number ^= s->channels - 1;
+        }
+        break;
+
+    case CODEC_ID_INTERPLAY_DPCM:
+        in = 0;
+        sequence_number = LE_16(&buf[in]);
+        in += 6;  /* skip over the stream mask and stream length */
+        if (sequence_number == 1) {
+            predictor[0] = LE_16(&buf[in]);
+            in += 2;
+            SE_16BIT(predictor[0])
+            if (s->channels == 2) {
+                predictor[1] = LE_16(&buf[in]);
+                SE_16BIT(predictor[1])
+                in += 2;
+            }
+        } else {
+            for (i = 0; i < s->channels; i++)
+                predictor[i] = s->last_delta[i];
+        }
+
+        while (in < buf_size) {
+            predictor[channel_number] += interplay_delta_table[buf[in++]];
+            SATURATE_S16(predictor[channel_number]);
+            output_samples[out++] = predictor[channel_number];
+
+            /* toggle channel */
+            channel_number ^= s->channels - 1;
+        }
+
+        /* save predictors for next round */
+        for (i = 0; i < s->channels; i++)
+            s->last_delta[i] = predictor[i];
+
+        break;
+    }
+
+    *data_size = out * sizeof(short);
+    return buf_size;
+}
+
+AVCodec roq_dpcm_decoder = {
+    "roq_dpcm",
+    CODEC_TYPE_AUDIO,
+    CODEC_ID_ROQ_DPCM,
+    sizeof(DPCMContext),
+    dpcm_decode_init,
+    NULL,
+    NULL,
+    dpcm_decode_frame,
+};
+
+AVCodec interplay_dpcm_decoder = {
+    "interplay_dpcm",
+    CODEC_TYPE_AUDIO,
+    CODEC_ID_INTERPLAY_DPCM,
+    sizeof(DPCMContext),
+    dpcm_decode_init,
+    NULL,
+    NULL,
+    dpcm_decode_frame,
+};

libavcodec/interplayvideo.c

+/*
+ * Interplay MVE Video Decoder
+ * Copyright (C) 2003 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 roqvideo.c
+ * Interplay MVE Video Decoder by Mike Melanson
+ * For more information about the Interplay MVE format, visit:
+ *   http://www.pcisys.net/~melanson/codecs/
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "common.h"
+#include "avcodec.h"
+#include "dsputil.h"
+
+typedef struct IpvideoContext {
+
+    AVCodecContext *avctx;
+    DSPContext dsp;
+    AVFrame last_frame;
+    AVFrame current_frame;
+    int first_frame;
+    int receiving_decoding_map;
+    unsigned char *decoding_map;
+    int decoding_map_size;
+
+    unsigned char *buf;
+    int size;
+
+} IpvideoContext;
+
+static int ipvideo_decode_init(AVCodecContext *avctx)
+{
+    IpvideoContext *s = avctx->priv_data;
+
+    s->avctx = avctx;
+    avctx->pix_fmt = PIX_FMT_YUV444P;
+    avctx->has_b_frames = 0;
+    dsputil_init(&s->dsp, avctx);
+
+    s->first_frame = 1;
+    s->receiving_decoding_map = 1;  /* decoding map will be received first */
+
+    /* decoding map contains 4 bits of information per 8x8 block */
+    s->decoding_map_size = avctx->width * avctx->height / (8 * 8 * 2);
+    s->decoding_map = av_malloc(s->decoding_map_size);
+
+    return 0;
+}
+
+static int ipvideo_decode_frame(AVCodecContext *avctx,
+                                void *data, int *data_size,
+                                uint8_t *buf, int buf_size)
+{
+    IpvideoContext *s = avctx->priv_data;
+
+    if (s->receiving_decoding_map) {
+        /* receiving the decoding map on this iteration */
+        s->receiving_decoding_map = 0;
+
+        if (buf_size != s->decoding_map_size)
+            printf (" Interplay video: buf_size != decoding_map_size (%d != %d)\n",
+                buf_size, s->decoding_map_size);
+        else
+            memcpy(s->decoding_map, buf, buf_size);
+
+        *data_size = 0;
+        *(AVFrame*)data = s->last_frame;
+    } else {
+        /* receiving the compressed video data on this iteration */
+        s->receiving_decoding_map = 1;
+        s->buf = buf;
+        s->size = buf_size;
+
+        if (avctx->get_buffer(avctx, &s->current_frame)) {
+            printf ("  Interplay Video: get_buffer() failed\n");
+            return -1;
+        }
+
+//        ipvideo_decode_frame(s);
+memset(s->current_frame.data[0], 0x80, s->current_frame.linesize[0] * avctx->height);
+memset(s->current_frame.data[1], 0x80, s->current_frame.linesize[1] * avctx->height / 4);
+memset(s->current_frame.data[2], 0x80, s->current_frame.linesize[2] * avctx->height / 4);
+
+        /* release the last frame if it is allocated */
+        if (s->first_frame)
+            s->first_frame = 0;
+        else
+            avctx->release_buffer(avctx, &s->last_frame);
+
+        /* shuffle frames */
+        s->last_frame = s->current_frame;
+
+        *data_size = sizeof(AVFrame);
+        *(AVFrame*)data = s->current_frame;
+    }
+
+    /* always report that the buffer was completely consumed */
+    return buf_size;
+}
+
+static int ipvideo_decode_end(AVCodecContext *avctx)
+{
+    IpvideoContext *s = avctx->priv_data;
+
+    /* release the last frame */
+    avctx->release_buffer(avctx, &s->last_frame);
+
+    av_free(s->decoding_map);
+
+    return 0;
+}
+
+AVCodec interplay_video_decoder = {
+    "interplayvideo",
+    CODEC_TYPE_VIDEO,
+    CODEC_ID_INTERPLAY_VIDEO,
+    sizeof(IpvideoContext),
+    ipvideo_decode_init,
+    NULL,
+    ipvideo_decode_end,
+    ipvideo_decode_frame,
+    CODEC_CAP_DR1,
+};

libavformat/Makefile

@@ -14,7 +14,7 @@ PPOBJS=
 # mux and demuxes
 OBJS+=mpeg.o mpegts.o mpegtsenc.o ffm.o crc.o img.o raw.o rm.o \
       avienc.o avidec.o wav.o swf.o au.o gif.o mov.o mpjpeg.o dvcore.o dv.o \
-      yuv4mpeg.o 4xm.o flvenc.o flvdec.o movenc.o psxstr.o
+      yuv4mpeg.o 4xm.o flvenc.o flvdec.o movenc.o psxstr.o idroq.o ipmovie.o
 
 ifeq ($(CONFIG_RISKY),yes)
 OBJS+= asf.o

libavformat/allformats.c

@@ -52,6 +52,8 @@ void av_register_all(void)
     flvenc_init();
     flvdec_init();
     str_init();
+    roq_init();
+    ipmovie_init();
 
 #ifdef AMR_NB
     amr_init();

libavformat/avformat.h

@@ -383,6 +383,12 @@ int fourxm_init(void);
 /* psxstr.c */
 int str_init(void);
 
+/* idroq.c */
+int roq_init(void);
+
+/* ipmovie.c */
+int ipmovie_init(void);
+
 #include "rtp.h"
 
 #include "rtsp.h"

libavformat/idroq.c

+/*
+ * Id RoQ (.roq) File Demuxer
+ * Copyright (c) 2003 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 idroq.c
+ * Id RoQ format file demuxer
+ * by Mike Melanson (melanson@pcisys.net)
+ * for more information on the .roq file format, visit:
+ *   http://www.csse.monash.edu.au/~timf/
+ */
+
+#include "avformat.h"
+
+#define LE_16(x)  ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
+#define LE_32(x)  ((((uint8_t*)(x))[3] << 24) | \
+                   (((uint8_t*)(x))[2] << 16) | \
+                   (((uint8_t*)(x))[1] << 8) | \
+                    ((uint8_t*)(x))[0])
+
+#define RoQ_MAGIC_NUMBER 0x1084
+#define RoQ_CHUNK_PREAMBLE_SIZE 8
+#define RoQ_AUDIO_SAMPLE_RATE 22050
+#define RoQ_CHUNKS_TO_SCAN 30
+
+#define RoQ_INFO           0x1001
+#define RoQ_QUAD_CODEBOOK  0x1002
+#define RoQ_QUAD_VQ        0x1011
+#define RoQ_SOUND_MONO     0x1020
+#define RoQ_SOUND_STEREO   0x1021
+
+typedef struct RoqDemuxContext {
+
+    int width;
+    int height;
+    int audio_channels;
+    int framerate;
+    int frame_pts_inc;
+
+    int video_stream_index;
+    int audio_stream_index;
+
+    int64_t video_pts;
+    unsigned int audio_frame_count;
+
+} RoqDemuxContext;
+
+static int roq_probe(AVProbeData *p)
+{
+    if ((LE_16(&p->buf[0]) != RoQ_MAGIC_NUMBER) ||
+        (LE_32(&p->buf[2]) != 0xFFFFFFFF))
+        return 0;
+
+    return AVPROBE_SCORE_MAX;
+}
+
+static int roq_read_header(AVFormatContext *s,
+                           AVFormatParameters *ap)
+{
+    RoqDemuxContext *roq = s->priv_data;
+    ByteIOContext *pb = &s->pb;
+    AVStream *st;
+    unsigned char preamble[RoQ_CHUNK_PREAMBLE_SIZE];
+    int i;
+    unsigned int chunk_size;
+    unsigned int chunk_type;
+
+    /* get the main header */
+    if (get_buffer(pb, preamble, RoQ_CHUNK_PREAMBLE_SIZE) != 
+        RoQ_CHUNK_PREAMBLE_SIZE)
+        return AVERROR_IO;
+    roq->framerate = LE_16(&preamble[6]);
+    roq->frame_pts_inc = 90000 / roq->framerate;
+
+    /* set the pts reference (1 pts = 1/90000) */
+    s->pts_num = 1;
+    s->pts_den = 90000;
+
+    /* init private context parameters */
+    roq->width = roq->height = roq->audio_channels = roq->video_pts = 
+    roq->audio_frame_count = 0;
+
+    /* scan the first n chunks searching for A/V parameters */
+    for (i = 0; i < RoQ_CHUNKS_TO_SCAN; i++) {
+        if (get_buffer(pb, preamble, RoQ_CHUNK_PREAMBLE_SIZE) != 
+            RoQ_CHUNK_PREAMBLE_SIZE)
+            return AVERROR_IO;
+
+        chunk_type = LE_16(&preamble[0]);
+        chunk_size = LE_32(&preamble[2]);
+
+        switch (chunk_type) {
+
+        case RoQ_INFO:
+            /* fetch the width and height; reuse the preamble bytes */
+            if (get_buffer(pb, preamble, RoQ_CHUNK_PREAMBLE_SIZE) != 
+                RoQ_CHUNK_PREAMBLE_SIZE)
+                return AVERROR_IO;
+            roq->width = LE_16(&preamble[0]);
+            roq->height = LE_16(&preamble[2]);
+            break;
+
+        case RoQ_QUAD_CODEBOOK:
+        case RoQ_QUAD_VQ:
+            /* ignore during this scan */
+            url_fseek(pb, chunk_size, SEEK_CUR);
+            break;
+
+        case RoQ_SOUND_MONO:
+            roq->audio_channels = 1;
+            url_fseek(pb, chunk_size, SEEK_CUR);
+            break;
+
+        case RoQ_SOUND_STEREO:
+            roq->audio_channels = 2;
+            url_fseek(pb, chunk_size, SEEK_CUR);
+            break;
+
+        default:
+            printf (" unknown RoQ chunk type (%04X)\n", LE_16(&preamble[0]));
+            return AVERROR_INVALIDDATA;
+            break;
+        }
+
+        /* if all necessary parameters have been gathered, exit early */
+        if ((roq->width && roq->height) && roq->audio_channels)
+            break;
+    }
+
+    /* seek back to the first chunk */
+    url_fseek(pb, RoQ_CHUNK_PREAMBLE_SIZE, SEEK_SET);
+
+    /* initialize the decoders */
+    st = av_new_stream(s, 0);
+    if (!st)
+        return AVERROR_NOMEM;
+    roq->video_stream_index = st->index;
+    st->codec.codec_type = CODEC_TYPE_VIDEO;
+    st->codec.codec_id = CODEC_ID_ROQ;
+    st->codec.codec_tag = 0;  /* no fourcc */
+    st->codec.width = roq->width;
+    st->codec.height = roq->height;
+
+    if (roq->audio_channels) {
+        st = av_new_stream(s, 0);
+        if (!st)
+            return AVERROR_NOMEM;
+        roq->audio_stream_index = st->index;
+        st->codec.codec_type = CODEC_TYPE_AUDIO;
+        st->codec.codec_id = CODEC_ID_ROQ_DPCM;
+        st->codec.codec_tag = 0;  /* no tag */
+        st->codec.channels = roq->audio_channels;
+        st->codec.sample_rate = RoQ_AUDIO_SAMPLE_RATE;
+        st->codec.bits_per_sample = 16;
+        st->codec.bit_rate = st->codec.channels * st->codec.sample_rate *
+            st->codec.bits_per_sample;
+        st->codec.block_align = st->codec.channels * st->codec.bits_per_sample;
+    }
+printf (" video is %d x %d, audio is %d channels\n",
+  roq->width, roq->height, roq->audio_channels);
+
+    return 0;
+}
+
+static int roq_read_packet(AVFormatContext *s,
+                           AVPacket *pkt)
+{
+    RoqDemuxContext *roq = s->priv_data;
+    ByteIOContext *pb = &s->pb;
+    int ret = 0;
+    unsigned int chunk_size;
+    unsigned int chunk_type;
+    unsigned int codebook_size;
+    unsigned char preamble[RoQ_CHUNK_PREAMBLE_SIZE];
+    int packet_read = 0;
+    offset_t codebook_offset;
+
+    while (!packet_read) {
+
+        if (url_feof(&s->pb))
+            return -EIO;
+
+        /* get the next chunk preamble */
+        if ((ret = get_buffer(pb, preamble, RoQ_CHUNK_PREAMBLE_SIZE)) != 
+            RoQ_CHUNK_PREAMBLE_SIZE)
+            return -EIO;
+
+        chunk_type = LE_16(&preamble[0]);
+        chunk_size = LE_32(&preamble[2]);
+
+        switch (chunk_type) {
+
+        case RoQ_INFO:
+            /* don't care about this chunk anymore */
+            url_fseek(pb, RoQ_CHUNK_PREAMBLE_SIZE, SEEK_CUR);
+            break;
+
+        case RoQ_QUAD_CODEBOOK:
+            /* packet needs to contain both this codebook and next VQ chunk */
+            codebook_offset = url_ftell(pb) - RoQ_CHUNK_PREAMBLE_SIZE;
+            codebook_size = chunk_size;
+            url_fseek(pb, codebook_size, SEEK_CUR);
+            if (get_buffer(pb, preamble, RoQ_CHUNK_PREAMBLE_SIZE) != 
+                RoQ_CHUNK_PREAMBLE_SIZE)
+                return -EIO;
+            chunk_size = LE_32(&preamble[2]) + RoQ_CHUNK_PREAMBLE_SIZE * 2 + 
+                codebook_size;
+
+            /* rewind */
+            url_fseek(pb, codebook_offset, SEEK_SET);
+
+            /* load up the packet */
+            if (av_new_packet(pkt, chunk_size))
+                return -EIO;
+            pkt->stream_index = roq->video_stream_index;
+            pkt->pts = roq->video_pts;
+            ret = get_buffer(pb, pkt->data, chunk_size);
+            if (ret != chunk_size)
+                ret = -EIO;
+
+            roq->video_pts += roq->frame_pts_inc;
+            packet_read = 1;
+            break;
+
+        case RoQ_SOUND_MONO:
+        case RoQ_SOUND_STEREO:
+        case RoQ_QUAD_VQ:
+            /* load up the packet */
+            if (av_new_packet(pkt, chunk_size + RoQ_CHUNK_PREAMBLE_SIZE))
+                return -EIO;
+            /* copy over preamble */
+            memcpy(pkt->data, preamble, RoQ_CHUNK_PREAMBLE_SIZE);
+
+            if (chunk_type == RoQ_QUAD_VQ) {
+                pkt->stream_index = roq->video_stream_index;
+                pkt->pts = roq->video_pts;
+                roq->video_pts += roq->frame_pts_inc;
+            } else {
+                pkt->stream_index = roq->audio_stream_index;
+                pkt->pts = roq->audio_frame_count;
+                pkt->pts *= 90000;
+                pkt->pts /= RoQ_AUDIO_SAMPLE_RATE;
+                roq->audio_frame_count += (chunk_size / roq->audio_channels);
+            }
+
+            ret = get_buffer(pb, pkt->data, chunk_size);
+            if (ret != chunk_size)
+                ret = -EIO;
+
+            packet_read = 1;
+            break;
+
+        default:
+            printf ("  unknown RoQ chunk (%04X)\n", chunk_type);
+            return AVERROR_INVALIDDATA;
+            break;
+        }
+    }
+
+    return ret;
+}
+
+static int roq_read_close(AVFormatContext *s)
+{
+//    RoqDemuxContext *roq = (RoqDemuxContext *)s->priv_data;
+
+    return 0;
+}
+
+static AVInputFormat roq_iformat = {
+    "RoQ",
+    "Id RoQ format",
+    sizeof(RoqDemuxContext),
+    roq_probe,
+    roq_read_header,
+    roq_read_packet,
+    roq_read_close,
+};
+
+int roq_init(void)
+{
+    av_register_input_format(&roq_iformat);
+    return 0;
+}