Merge commit '81eec081afea9fc017a175581ceea7c420a0dfc3'
[ffmpeg.git] / libavformat / rm.c
index 96752f2..0591a17 100644 (file)
@@ -1,6 +1,6 @@
 /*
- * "Real" compatible muxer and demuxer.
- * Copyright (c) 2000, 2001 Fabrice Bellard.
+ * "Real" compatible muxer and demuxer common code.
+ * Copyright (c) 2009  Aurelien Jacobs <aurel@gnuage.org>
  *
  * This file is part of FFmpeg.
  *
  * 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"
 
-/* in ms */
-#define BUFFER_DURATION 0
+#include "rm.h"
 
-typedef struct {
-    int nb_packets;
-    int packet_total_size;
-    int packet_max_size;
-    /* codec related output */
-    int bit_rate;
-    float frame_rate;
-    int nb_frames;    /* current frame number */
-    int total_frames; /* total number of frames */
-    int num;
-    AVCodecContext *enc;
-} StreamInfo;
-
-typedef struct {
-    StreamInfo streams[2];
-    StreamInfo *audio_stream, *video_stream;
-    int data_pos; /* position of the data after the header */
-    int nb_packets;
-    int old_format;
-    int current_stream;
-    int remaining_len;
-    /// Audio descrambling matrix parameters
-    uint8_t *audiobuf; ///< place to store reordered audio data
-    int64_t audiotimestamp; ///< Audio packet timestamp
-    int sub_packet_cnt; // Subpacket counter, used while reading
-    int sub_packet_size, sub_packet_h, coded_framesize; ///< Descrambling parameters from container
-    int audio_stream_num; ///< Stream number for audio packets
-    int audio_pkt_cnt; ///< Output packet counter
-    int audio_framesize; /// Audio frame size from container
-    int sub_packet_lengths[16]; /// Length of each aac subpacket
-} RMContext;
-
-#ifdef CONFIG_MUXERS
-static void put_str(ByteIOContext *s, const char *tag)
-{
-    put_be16(s,strlen(tag));
-    while (*tag) {
-        put_byte(s, *tag++);
-    }
-}
-
-static void put_str8(ByteIOContext *s, const char *tag)
-{
-    put_byte(s, strlen(tag));
-    while (*tag) {
-        put_byte(s, *tag++);
-    }
-}
-
-static void rv10_write_header(AVFormatContext *ctx,
-                              int data_size, int index_pos)
-{
-    RMContext *rm = ctx->priv_data;
-    ByteIOContext *s = &ctx->pb;
-    StreamInfo *stream;
-    unsigned char *data_offset_ptr, *start_ptr;
-    const char *desc, *mimetype;
-    int nb_packets, packet_total_size, packet_max_size, size, packet_avg_size, i;
-    int bit_rate, v, duration, flags, data_pos;
-
-    start_ptr = s->buf_ptr;
-
-    put_tag(s, ".RMF");
-    put_be32(s,18); /* header size */
-    put_be16(s,0);
-    put_be32(s,0);
-    put_be32(s,4 + ctx->nb_streams); /* num headers */
-
-    put_tag(s,"PROP");
-    put_be32(s, 50);
-    put_be16(s, 0);
-    packet_max_size = 0;
-    packet_total_size = 0;
-    nb_packets = 0;
-    bit_rate = 0;
-    duration = 0;
-    for(i=0;i<ctx->nb_streams;i++) {
-        StreamInfo *stream = &rm->streams[i];
-        bit_rate += stream->bit_rate;
-        if (stream->packet_max_size > packet_max_size)
-            packet_max_size = stream->packet_max_size;
-        nb_packets += stream->nb_packets;
-        packet_total_size += stream->packet_total_size;
-        /* select maximum duration */
-        v = (int) (1000.0 * (float)stream->total_frames / stream->frame_rate);
-        if (v > duration)
-            duration = v;
-    }
-    put_be32(s, bit_rate); /* max bit rate */
-    put_be32(s, bit_rate); /* avg bit rate */
-    put_be32(s, packet_max_size);        /* max packet size */
-    if (nb_packets > 0)
-        packet_avg_size = packet_total_size / nb_packets;
-    else
-        packet_avg_size = 0;
-    put_be32(s, packet_avg_size);        /* avg packet size */
-    put_be32(s, nb_packets);  /* num packets */
-    put_be32(s, duration); /* duration */
-    put_be32(s, BUFFER_DURATION);           /* preroll */
-    put_be32(s, index_pos);           /* index offset */
-    /* computation of data the data offset */
-    data_offset_ptr = s->buf_ptr;
-    put_be32(s, 0);           /* data offset : will be patched after */
-    put_be16(s, ctx->nb_streams);    /* num streams */
-    flags = 1 | 2; /* save allowed & perfect play */
-    if (url_is_streamed(s))
-        flags |= 4; /* live broadcast */
-    put_be16(s, flags);
-
-    /* comments */
-
-    put_tag(s,"CONT");
-    size = strlen(ctx->title) + strlen(ctx->author) + strlen(ctx->copyright) +
-        strlen(ctx->comment) + 4 * 2 + 10;
-    put_be32(s,size);
-    put_be16(s,0);
-    put_str(s, ctx->title);
-    put_str(s, ctx->author);
-    put_str(s, ctx->copyright);
-    put_str(s, ctx->comment);
-
-    for(i=0;i<ctx->nb_streams;i++) {
-        int codec_data_size;
-
-        stream = &rm->streams[i];
-
-        if (stream->enc->codec_type == CODEC_TYPE_AUDIO) {
-            desc = "The Audio Stream";
-            mimetype = "audio/x-pn-realaudio";
-            codec_data_size = 73;
-        } else {
-            desc = "The Video Stream";
-            mimetype = "video/x-pn-realvideo";
-            codec_data_size = 34;
-        }
-
-        put_tag(s,"MDPR");
-        size = 10 + 9 * 4 + strlen(desc) + strlen(mimetype) + codec_data_size;
-        put_be32(s, size);
-        put_be16(s, 0);
-
-        put_be16(s, i); /* stream number */
-        put_be32(s, stream->bit_rate); /* max bit rate */
-        put_be32(s, stream->bit_rate); /* avg bit rate */
-        put_be32(s, stream->packet_max_size);        /* max packet size */
-        if (stream->nb_packets > 0)
-            packet_avg_size = stream->packet_total_size /
-                stream->nb_packets;
-        else
-            packet_avg_size = 0;
-        put_be32(s, packet_avg_size);        /* avg packet size */
-        put_be32(s, 0);           /* start time */
-        put_be32(s, BUFFER_DURATION);           /* preroll */
-        /* duration */
-        if (url_is_streamed(s) || !stream->total_frames)
-            put_be32(s, (int)(3600 * 1000));
-        else
-            put_be32(s, (int)(stream->total_frames * 1000 / stream->frame_rate));
-        put_str8(s, desc);
-        put_str8(s, mimetype);
-        put_be32(s, codec_data_size);
-
-        if (stream->enc->codec_type == CODEC_TYPE_AUDIO) {
-            int coded_frame_size, fscode, sample_rate;
-            sample_rate = stream->enc->sample_rate;
-            coded_frame_size = (stream->enc->bit_rate *
-                                stream->enc->frame_size) / (8 * sample_rate);
-            /* audio codec info */
-            put_tag(s, ".ra");
-            put_byte(s, 0xfd);
-            put_be32(s, 0x00040000); /* version */
-            put_tag(s, ".ra4");
-            put_be32(s, 0x01b53530); /* stream length */
-            put_be16(s, 4); /* unknown */
-            put_be32(s, 0x39); /* header size */
-
-            switch(sample_rate) {
-            case 48000:
-            case 24000:
-            case 12000:
-                fscode = 1;
-                break;
-            default:
-            case 44100:
-            case 22050:
-            case 11025:
-                fscode = 2;
-                break;
-            case 32000:
-            case 16000:
-            case 8000:
-                fscode = 3;
-            }
-            put_be16(s, fscode); /* codec additional info, for AC3, seems
-                                     to be a frequency code */
-            /* special hack to compensate rounding errors... */
-            if (coded_frame_size == 557)
-                coded_frame_size--;
-            put_be32(s, coded_frame_size); /* frame length */
-            put_be32(s, 0x51540); /* unknown */
-            put_be32(s, 0x249f0); /* unknown */
-            put_be32(s, 0x249f0); /* unknown */
-            put_be16(s, 0x01);
-            /* frame length : seems to be very important */
-            put_be16(s, coded_frame_size);
-            put_be32(s, 0); /* unknown */
-            put_be16(s, stream->enc->sample_rate); /* sample rate */
-            put_be32(s, 0x10); /* unknown */
-            put_be16(s, stream->enc->channels);
-            put_str8(s, "Int0"); /* codec name */
-            put_str8(s, "dnet"); /* codec name */
-            put_be16(s, 0); /* title length */
-            put_be16(s, 0); /* author length */
-            put_be16(s, 0); /* copyright length */
-            put_byte(s, 0); /* end of header */
-        } else {
-            /* video codec info */
-            put_be32(s,34); /* size */
-            if(stream->enc->codec_id == CODEC_ID_RV10)
-                put_tag(s,"VIDORV10");
-            else
-                put_tag(s,"VIDORV20");
-            put_be16(s, stream->enc->width);
-            put_be16(s, stream->enc->height);
-            put_be16(s, (int) stream->frame_rate); /* frames per seconds ? */
-            put_be32(s,0);     /* unknown meaning */
-            put_be16(s, (int) stream->frame_rate);  /* unknown meaning */
-            put_be32(s,0);     /* unknown meaning */
-            put_be16(s, 8);    /* unknown meaning */
-            /* Seems to be the codec version: only use basic H263. The next
-               versions seems to add a diffential DC coding as in
-               MPEG... nothing new under the sun */
-            if(stream->enc->codec_id == CODEC_ID_RV10)
-                put_be32(s,0x10000000);
-            else
-                put_be32(s,0x20103001);
-            //put_be32(s,0x10003000);
-        }
-    }
-
-    /* patch data offset field */
-    data_pos = s->buf_ptr - start_ptr;
-    rm->data_pos = data_pos;
-    data_offset_ptr[0] = data_pos >> 24;
-    data_offset_ptr[1] = data_pos >> 16;
-    data_offset_ptr[2] = data_pos >> 8;
-    data_offset_ptr[3] = data_pos;
-
-    /* data stream */
-    put_tag(s,"DATA");
-    put_be32(s,data_size + 10 + 8);
-    put_be16(s,0);
-
-    put_be32(s, nb_packets); /* number of packets */
-    put_be32(s,0); /* next data header */
-}
-
-static void write_packet_header(AVFormatContext *ctx, StreamInfo *stream,
-                                int length, int key_frame)
-{
-    int timestamp;
-    ByteIOContext *s = &ctx->pb;
-
-    stream->nb_packets++;
-    stream->packet_total_size += length;
-    if (length > stream->packet_max_size)
-        stream->packet_max_size =  length;
-
-    put_be16(s,0); /* version */
-    put_be16(s,length + 12);
-    put_be16(s, stream->num); /* stream number */
-    timestamp = (1000 * (float)stream->nb_frames) / stream->frame_rate;
-    put_be32(s, timestamp); /* timestamp */
-    put_byte(s, 0); /* reserved */
-    put_byte(s, key_frame ? 2 : 0); /* flags */
-}
-
-static int rm_write_header(AVFormatContext *s)
-{
-    RMContext *rm = s->priv_data;
-    StreamInfo *stream;
-    int n;
-    AVCodecContext *codec;
-
-    for(n=0;n<s->nb_streams;n++) {
-        s->streams[n]->id = n;
-        codec = s->streams[n]->codec;
-        stream = &rm->streams[n];
-        memset(stream, 0, sizeof(StreamInfo));
-        stream->num = n;
-        stream->bit_rate = codec->bit_rate;
-        stream->enc = codec;
-
-        switch(codec->codec_type) {
-        case CODEC_TYPE_AUDIO:
-            rm->audio_stream = stream;
-            stream->frame_rate = (float)codec->sample_rate / (float)codec->frame_size;
-            /* XXX: dummy values */
-            stream->packet_max_size = 1024;
-            stream->nb_packets = 0;
-            stream->total_frames = stream->nb_packets;
-            break;
-        case CODEC_TYPE_VIDEO:
-            rm->video_stream = stream;
-            stream->frame_rate = (float)codec->time_base.den / (float)codec->time_base.num;
-            /* XXX: dummy values */
-            stream->packet_max_size = 4096;
-            stream->nb_packets = 0;
-            stream->total_frames = stream->nb_packets;
-            break;
-        default:
-            return -1;
-        }
-    }
-
-    rv10_write_header(s, 0, 0);
-    put_flush_packet(&s->pb);
-    return 0;
-}
-
-static int rm_write_audio(AVFormatContext *s, const uint8_t *buf, int size, int flags)
-{
-    uint8_t *buf1;
-    RMContext *rm = s->priv_data;
-    ByteIOContext *pb = &s->pb;
-    StreamInfo *stream = rm->audio_stream;
-    int i;
-
-    /* XXX: suppress this malloc */
-    buf1= (uint8_t*) av_malloc( size * sizeof(uint8_t) );
-
-    write_packet_header(s, stream, size, !!(flags & PKT_FLAG_KEY));
-
-    /* for AC3, the words seems to be reversed */
-    for(i=0;i<size;i+=2) {
-        buf1[i] = buf[i+1];
-        buf1[i+1] = buf[i];
-    }
-    put_buffer(pb, buf1, size);
-    put_flush_packet(pb);
-    stream->nb_frames++;
-    av_free(buf1);
-    return 0;
-}
-
-static int rm_write_video(AVFormatContext *s, const uint8_t *buf, int size, int flags)
-{
-    RMContext *rm = s->priv_data;
-    ByteIOContext *pb = &s->pb;
-    StreamInfo *stream = rm->video_stream;
-    int key_frame = !!(flags & PKT_FLAG_KEY);
-
-    /* XXX: this is incorrect: should be a parameter */
-
-    /* Well, I spent some time finding the meaning of these bits. I am
-       not sure I understood everything, but it works !! */
-#if 1
-    write_packet_header(s, stream, size + 7, key_frame);
-    /* bit 7: '1' if final packet of a frame converted in several packets */
-    put_byte(pb, 0x81);
-    /* bit 7: '1' if I frame. bits 6..0 : sequence number in current
-       frame starting from 1 */
-    if (key_frame) {
-        put_byte(pb, 0x81);
-    } else {
-        put_byte(pb, 0x01);
-    }
-    put_be16(pb, 0x4000 + (size)); /* total frame size */
-    put_be16(pb, 0x4000 + (size));              /* offset from the start or the end */
-#else
-    /* full frame */
-    write_packet_header(s, size + 6);
-    put_byte(pb, 0xc0);
-    put_be16(pb, 0x4000 + size); /* total frame size */
-    put_be16(pb, 0x4000 + packet_number * 126); /* position in stream */
-#endif
-    put_byte(pb, stream->nb_frames & 0xff);
-
-    put_buffer(pb, buf, size);
-    put_flush_packet(pb);
-
-    stream->nb_frames++;
-    return 0;
-}
-
-static int rm_write_packet(AVFormatContext *s, AVPacket *pkt)
-{
-    if (s->streams[pkt->stream_index]->codec->codec_type ==
-        CODEC_TYPE_AUDIO)
-        return rm_write_audio(s, pkt->data, pkt->size, pkt->flags);
-    else
-        return rm_write_video(s, pkt->data, pkt->size, pkt->flags);
-}
-
-static int rm_write_trailer(AVFormatContext *s)
-{
-    RMContext *rm = s->priv_data;
-    int data_size, index_pos, i;
-    ByteIOContext *pb = &s->pb;
-
-    if (!url_is_streamed(&s->pb)) {
-        /* end of file: finish to write header */
-        index_pos = url_fseek(pb, 0, SEEK_CUR);
-        data_size = index_pos - rm->data_pos;
-
-        /* index */
-        put_tag(pb, "INDX");
-        put_be32(pb, 10 + 10 * s->nb_streams);
-        put_be16(pb, 0);
-
-        for(i=0;i<s->nb_streams;i++) {
-            put_be32(pb, 0); /* zero indices */
-            put_be16(pb, i); /* stream number */
-            put_be32(pb, 0); /* next index */
-        }
-        /* undocumented end header */
-        put_be32(pb, 0);
-        put_be32(pb, 0);
-
-        url_fseek(pb, 0, SEEK_SET);
-        for(i=0;i<s->nb_streams;i++)
-            rm->streams[i].total_frames = rm->streams[i].nb_frames;
-        rv10_write_header(s, data_size, index_pos);
-    } else {
-        /* undocumented end header */
-        put_be32(pb, 0);
-        put_be32(pb, 0);
-    }
-    put_flush_packet(pb);
-    return 0;
-}
-#endif //CONFIG_MUXERS
-
-/***************************************************/
-
-static void get_str(ByteIOContext *pb, char *buf, int buf_size)
-{
-    int len, i;
-    char *q;
-
-    len = get_be16(pb);
-    q = buf;
-    for(i=0;i<len;i++) {
-        if (i < buf_size - 1)
-            *q++ = get_byte(pb);
-    }
-    *q = '\0';
-}
-
-static void get_str8(ByteIOContext *pb, char *buf, int buf_size)
-{
-    int len, i;
-    char *q;
-
-    len = get_byte(pb);
-    q = buf;
-    for(i=0;i<len;i++) {
-        if (i < buf_size - 1)
-            *q++ = get_byte(pb);
-    }
-    *q = '\0';
-}
-
-static int rm_read_audio_stream_info(AVFormatContext *s, AVStream *st,
-                                      int read_all)
-{
-    RMContext *rm = s->priv_data;
-    ByteIOContext *pb = &s->pb;
-    char buf[256];
-    uint32_t version;
-    int i;
-
-    /* ra type header */
-    version = get_be32(pb); /* version */
-    if (((version >> 16) & 0xff) == 3) {
-        int64_t startpos = url_ftell(pb);
-        /* very old version */
-        for(i = 0; i < 14; i++)
-            get_byte(pb);
-        get_str8(pb, s->title, sizeof(s->title));
-        get_str8(pb, s->author, sizeof(s->author));
-        get_str8(pb, s->copyright, sizeof(s->copyright));
-        get_str8(pb, s->comment, sizeof(s->comment));
-        if ((startpos + (version & 0xffff)) >= url_ftell(pb) + 2) {
-        // fourcc (should always be "lpcJ")
-        get_byte(pb);
-        get_str8(pb, buf, sizeof(buf));
-        }
-        // Skip extra header crap (this should never happen)
-        if ((startpos + (version & 0xffff)) > url_ftell(pb))
-            url_fskip(pb, (version & 0xffff) + startpos - url_ftell(pb));
-        st->codec->sample_rate = 8000;
-        st->codec->channels = 1;
-        st->codec->codec_type = CODEC_TYPE_AUDIO;
-        st->codec->codec_id = CODEC_ID_RA_144;
-    } else {
-        int flavor, sub_packet_h, coded_framesize, sub_packet_size;
-        /* old version (4) */
-        get_be32(pb); /* .ra4 */
-        get_be32(pb); /* data size */
-        get_be16(pb); /* version2 */
-        get_be32(pb); /* header size */
-        flavor= get_be16(pb); /* add codec info / flavor */
-        rm->coded_framesize = coded_framesize = get_be32(pb); /* coded frame size */
-        get_be32(pb); /* ??? */
-        get_be32(pb); /* ??? */
-        get_be32(pb); /* ??? */
-        rm->sub_packet_h = sub_packet_h = get_be16(pb); /* 1 */
-        st->codec->block_align= get_be16(pb); /* frame size */
-        rm->sub_packet_size = sub_packet_size = get_be16(pb); /* sub packet size */
-        get_be16(pb); /* ??? */
-        if (((version >> 16) & 0xff) == 5) {
-            get_be16(pb); get_be16(pb); get_be16(pb); }
-        st->codec->sample_rate = get_be16(pb);
-        get_be32(pb);
-        st->codec->channels = get_be16(pb);
-        if (((version >> 16) & 0xff) == 5) {
-            get_be32(pb);
-            buf[0] = get_byte(pb);
-            buf[1] = get_byte(pb);
-            buf[2] = get_byte(pb);
-            buf[3] = get_byte(pb);
-            buf[4] = 0;
-        } else {
-            get_str8(pb, buf, sizeof(buf)); /* desc */
-            get_str8(pb, buf, sizeof(buf)); /* desc */
-        }
-        st->codec->codec_type = CODEC_TYPE_AUDIO;
-        if (!strcmp(buf, "dnet")) {
-            st->codec->codec_id = CODEC_ID_AC3;
-        } else if (!strcmp(buf, "28_8")) {
-            st->codec->codec_id = CODEC_ID_RA_288;
-            st->codec->extradata_size= 0;
-            rm->audio_framesize = st->codec->block_align;
-            st->codec->block_align = coded_framesize;
-
-            if(rm->audio_framesize >= UINT_MAX / sub_packet_h){
-                av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
-                return -1;
-            }
-
-            rm->audiobuf = av_malloc(rm->audio_framesize * sub_packet_h);
-        } else if ((!strcmp(buf, "cook")) || (!strcmp(buf, "atrc"))) {
-            int codecdata_length, i;
-            get_be16(pb); get_byte(pb);
-            if (((version >> 16) & 0xff) == 5)
-                get_byte(pb);
-            codecdata_length = get_be32(pb);
-            if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
-                av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
-                return -1;
-            }
-
-            if (!strcmp(buf, "cook")) st->codec->codec_id = CODEC_ID_COOK;
-            else st->codec->codec_id = CODEC_ID_ATRAC3;
-            st->codec->extradata_size= codecdata_length;
-            st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
-            for(i = 0; i < codecdata_length; i++)
-                ((uint8_t*)st->codec->extradata)[i] = get_byte(pb);
-            rm->audio_framesize = st->codec->block_align;
-            st->codec->block_align = rm->sub_packet_size;
-
-            if(rm->audio_framesize >= UINT_MAX / sub_packet_h){
-                av_log(s, AV_LOG_ERROR, "rm->audio_framesize * sub_packet_h too large\n");
-                return -1;
-            }
-
-            rm->audiobuf = av_malloc(rm->audio_framesize * sub_packet_h);
-        } else if (!strcmp(buf, "raac") || !strcmp(buf, "racp")) {
-            int codecdata_length, i;
-            get_be16(pb); get_byte(pb);
-            if (((version >> 16) & 0xff) == 5)
-                get_byte(pb);
-            st->codec->codec_id = CODEC_ID_AAC;
-            codecdata_length = get_be32(pb);
-            if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
-                av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
-                return -1;
-            }
-            if (codecdata_length >= 1) {
-                st->codec->extradata_size = codecdata_length - 1;
-                st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
-                get_byte(pb);
-                for(i = 0; i < st->codec->extradata_size; i++)
-                    ((uint8_t*)st->codec->extradata)[i] = get_byte(pb);
-            }
-        } else {
-            st->codec->codec_id = CODEC_ID_NONE;
-            pstrcpy(st->codec->codec_name, sizeof(st->codec->codec_name),
-                    buf);
-        }
-        if (read_all) {
-            get_byte(pb);
-            get_byte(pb);
-            get_byte(pb);
-
-            get_str8(pb, s->title, sizeof(s->title));
-            get_str8(pb, s->author, sizeof(s->author));
-            get_str8(pb, s->copyright, sizeof(s->copyright));
-            get_str8(pb, s->comment, sizeof(s->comment));
-        }
-    }
-    return 0;
-}
-
-static int rm_read_header_old(AVFormatContext *s, AVFormatParameters *ap)
-{
-    RMContext *rm = s->priv_data;
-    AVStream *st;
-
-    rm->old_format = 1;
-    st = av_new_stream(s, 0);
-    if (!st)
-        return -1;
-    return rm_read_audio_stream_info(s, st, 1);
-}
-
-static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap)
-{
-    RMContext *rm = s->priv_data;
-    AVStream *st;
-    ByteIOContext *pb = &s->pb;
-    unsigned int tag, v;
-    int tag_size, size, codec_data_size, i;
-    int64_t codec_pos;
-    unsigned int start_time, duration;
-    char buf[128];
-    int flags = 0;
-
-    tag = get_le32(pb);
-    if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
-        /* very old .ra format */
-        return rm_read_header_old(s, ap);
-    } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
-        return AVERROR_IO;
-    }
-
-    get_be32(pb); /* header size */
-    get_be16(pb);
-    get_be32(pb);
-    get_be32(pb); /* number of headers */
-
-    for(;;) {
-        if (url_feof(pb))
-            goto fail;
-        tag = get_le32(pb);
-        tag_size = get_be32(pb);
-        get_be16(pb);
-#if 0
-        printf("tag=%c%c%c%c (%08x) size=%d\n",
-               (tag) & 0xff,
-               (tag >> 8) & 0xff,
-               (tag >> 16) & 0xff,
-               (tag >> 24) & 0xff,
-               tag,
-               tag_size);
-#endif
-        if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
-            goto fail;
-        switch(tag) {
-        case MKTAG('P', 'R', 'O', 'P'):
-            /* file header */
-            get_be32(pb); /* max bit rate */
-            get_be32(pb); /* avg bit rate */
-            get_be32(pb); /* max packet size */
-            get_be32(pb); /* avg packet size */
-            get_be32(pb); /* nb packets */
-            get_be32(pb); /* duration */
-            get_be32(pb); /* preroll */
-            get_be32(pb); /* index offset */
-            get_be32(pb); /* data offset */
-            get_be16(pb); /* nb streams */
-            flags = get_be16(pb); /* flags */
-            break;
-        case MKTAG('C', 'O', 'N', 'T'):
-            get_str(pb, s->title, sizeof(s->title));
-            get_str(pb, s->author, sizeof(s->author));
-            get_str(pb, s->copyright, sizeof(s->copyright));
-            get_str(pb, s->comment, sizeof(s->comment));
-            break;
-        case MKTAG('M', 'D', 'P', 'R'):
-            st = av_new_stream(s, 0);
-            if (!st)
-                goto fail;
-            st->id = get_be16(pb);
-            get_be32(pb); /* max bit rate */
-            st->codec->bit_rate = get_be32(pb); /* bit rate */
-            get_be32(pb); /* max packet size */
-            get_be32(pb); /* avg packet size */
-            start_time = get_be32(pb); /* start time */
-            get_be32(pb); /* preroll */
-            duration = get_be32(pb); /* duration */
-            st->start_time = start_time;
-            st->duration = duration;
-            get_str8(pb, buf, sizeof(buf)); /* desc */
-            get_str8(pb, buf, sizeof(buf)); /* mimetype */
-            codec_data_size = get_be32(pb);
-            codec_pos = url_ftell(pb);
-            st->codec->codec_type = CODEC_TYPE_DATA;
-            av_set_pts_info(st, 64, 1, 1000);
-
-            v = get_be32(pb);
-            if (v == MKTAG(0xfd, 'a', 'r', '.')) {
-                /* ra type header */
-                if (rm_read_audio_stream_info(s, st, 0))
-                    return -1;
-            } else {
-                int fps, fps2;
-                if (get_le32(pb) != MKTAG('V', 'I', 'D', 'O')) {
-                fail1:
-                    av_log(st->codec, AV_LOG_ERROR, "Unsupported video codec\n");
-                    goto skip;
-                }
-                st->codec->codec_tag = get_le32(pb);
-//                av_log(NULL, AV_LOG_DEBUG, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
-                if (   st->codec->codec_tag != MKTAG('R', 'V', '1', '0')
-                    && st->codec->codec_tag != MKTAG('R', 'V', '2', '0')
-                    && st->codec->codec_tag != MKTAG('R', 'V', '3', '0')
-                    && st->codec->codec_tag != MKTAG('R', 'V', '4', '0'))
-                    goto fail1;
-                st->codec->width = get_be16(pb);
-                st->codec->height = get_be16(pb);
-                st->codec->time_base.num= 1;
-                fps= get_be16(pb);
-                st->codec->codec_type = CODEC_TYPE_VIDEO;
-                get_be32(pb);
-                fps2= get_be16(pb);
-                get_be16(pb);
-
-                st->codec->extradata_size= codec_data_size - (url_ftell(pb) - codec_pos);
-
-                if(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)st->codec->extradata_size){
-                    //check is redundant as get_buffer() will catch this
-                    av_log(s, AV_LOG_ERROR, "st->codec->extradata_size too large\n");
-                    return -1;
-                }
-                st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
-                get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
-
-//                av_log(NULL, AV_LOG_DEBUG, "fps= %d fps2= %d\n", fps, fps2);
-                st->codec->time_base.den = fps * st->codec->time_base.num;
-                switch(((uint8_t*)st->codec->extradata)[4]>>4){
-                case 1: st->codec->codec_id = CODEC_ID_RV10; break;
-                case 2: st->codec->codec_id = CODEC_ID_RV20; break;
-                case 3: st->codec->codec_id = CODEC_ID_RV30; break;
-                case 4: st->codec->codec_id = CODEC_ID_RV40; break;
-                default: goto fail1;
-                }
-            }
-skip:
-            /* skip codec info */
-            size = url_ftell(pb) - codec_pos;
-            url_fskip(pb, codec_data_size - size);
-            break;
-        case MKTAG('D', 'A', 'T', 'A'):
-            goto header_end;
-        default:
-            /* unknown tag: skip it */
-            url_fskip(pb, tag_size - 10);
-            break;
-        }
-    }
- header_end:
-    rm->nb_packets = get_be32(pb); /* number of packets */
-    if (!rm->nb_packets && (flags & 4))
-        rm->nb_packets = 3600 * 25;
-    get_be32(pb); /* next data header */
-    return 0;
-
- fail:
-    for(i=0;i<s->nb_streams;i++) {
-        av_free(s->streams[i]);
-    }
-    return AVERROR_IO;
-}
-
-static int get_num(ByteIOContext *pb, int *len)
-{
-    int n, n1;
-
-    n = get_be16(pb);
-    (*len)-=2;
-    if (n >= 0x4000) {
-        return n - 0x4000;
-    } else {
-        n1 = get_be16(pb);
-        (*len)-=2;
-        return (n << 16) | n1;
-    }
-}
-
-/* multiple of 20 bytes for ra144 (ugly) */
-#define RAW_PACKET_SIZE 1000
-
-static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
-    RMContext *rm = s->priv_data;
-    ByteIOContext *pb = &s->pb;
-    int len, num, res, i;
-    AVStream *st;
-    uint32_t state=0xFFFFFFFF;
-
-    while(!url_feof(pb)){
-        *pos= url_ftell(pb);
-        if(rm->remaining_len > 0){
-            num= rm->current_stream;
-            len= rm->remaining_len;
-            *timestamp = AV_NOPTS_VALUE;
-            *flags= 0;
-        }else{
-            state= (state<<8) + get_byte(pb);
-
-            if(state == MKBETAG('I', 'N', 'D', 'X')){
-                len = get_be16(pb) - 6;
-                if(len<0)
-                    continue;
-                goto skip;
-            }
-
-            if(state > (unsigned)0xFFFF || state < 12)
-                continue;
-            len=state;
-            state= 0xFFFFFFFF;
-
-            num = get_be16(pb);
-            *timestamp = get_be32(pb);
-            res= get_byte(pb); /* reserved */
-            *flags = get_byte(pb); /* flags */
-
-
-            len -= 12;
-        }
-        for(i=0;i<s->nb_streams;i++) {
-            st = s->streams[i];
-            if (num == st->id)
-                break;
-        }
-        if (i == s->nb_streams) {
-skip:
-            /* skip packet if unknown number */
-            url_fskip(pb, len);
-            rm->remaining_len -= len;
-            continue;
-        }
-        *stream_index= i;
-
-        return len;
-    }
-    return -1;
-}
-
-static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
-{
-    RMContext *rm = s->priv_data;
-    ByteIOContext *pb = &s->pb;
-    AVStream *st;
-    int i, len, tmp, j;
-    int64_t timestamp, pos;
-    uint8_t *ptr;
-    int flags;
-
-    if (rm->audio_pkt_cnt) {
-        // If there are queued audio packet return them first
-        st = s->streams[rm->audio_stream_num];
-        if (st->codec->codec_id == CODEC_ID_AAC)
-            av_get_packet(pb, pkt, rm->sub_packet_lengths[rm->sub_packet_cnt - rm->audio_pkt_cnt]);
-        else {
-        av_new_packet(pkt, st->codec->block_align);
-        memcpy(pkt->data, rm->audiobuf + st->codec->block_align *
-               (rm->sub_packet_h * rm->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
-               st->codec->block_align);
-        }
-        rm->audio_pkt_cnt--;
-        pkt->flags = 0;
-        pkt->stream_index = rm->audio_stream_num;
-    } else if (rm->old_format) {
-        st = s->streams[0];
-        if (st->codec->codec_id == CODEC_ID_RA_288) {
-            int x, y;
-
-            for (y = 0; y < rm->sub_packet_h; y++)
-                for (x = 0; x < rm->sub_packet_h/2; x++)
-                    if (get_buffer(pb, rm->audiobuf+x*2*rm->audio_framesize+y*rm->coded_framesize, rm->coded_framesize) <= 0)
-                        return AVERROR_IO;
-            rm->audio_stream_num = 0;
-            rm->audio_pkt_cnt = rm->sub_packet_h * rm->audio_framesize / st->codec->block_align - 1;
-            // Release first audio packet
-            av_new_packet(pkt, st->codec->block_align);
-            memcpy(pkt->data, rm->audiobuf, st->codec->block_align);
-            pkt->flags |= PKT_FLAG_KEY; // Mark first packet as keyframe
-            pkt->stream_index = 0;
-        } else {
-            /* just read raw bytes */
-            len = RAW_PACKET_SIZE;
-            len= av_get_packet(pb, pkt, len);
-            pkt->stream_index = 0;
-            if (len <= 0) {
-                return AVERROR_IO;
-            }
-            pkt->size = len;
-        }
-    } else {
-        int seq=1;
-resync:
-        len=sync(s, &timestamp, &flags, &i, &pos);
-        if(len<0)
-            return AVERROR_IO;
-        st = s->streams[i];
-
-        if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
-            int h, pic_num, len2, pos;
-
-            h= get_byte(pb); len--;
-            if(!(h & 0x40)){
-                seq = get_byte(pb); len--;
-            }
-
-            if((h & 0xc0) == 0x40){
-                len2= pos= 0;
-            }else{
-                len2 = get_num(pb, &len);
-                pos = get_num(pb, &len);
-            }
-            /* picture number */
-            pic_num= get_byte(pb); len--;
-            rm->remaining_len= len;
-            rm->current_stream= st->id;
-
-//            av_log(NULL, AV_LOG_DEBUG, "%X len:%d pos:%d len2:%d pic_num:%d\n",h, len, pos, len2, pic_num);
-            if(len2 && len2<len)
-                len=len2;
-            rm->remaining_len-= len;
-            av_get_packet(pb, pkt, len);
-
-        } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
-            if ((st->codec->codec_id == CODEC_ID_RA_288) ||
-                (st->codec->codec_id == CODEC_ID_COOK) ||
-                (st->codec->codec_id == CODEC_ID_ATRAC3)) {
-                int x;
-                int sps = rm->sub_packet_size;
-                int cfs = rm->coded_framesize;
-                int h = rm->sub_packet_h;
-                int y = rm->sub_packet_cnt;
-                int w = rm->audio_framesize;
-
-                if (flags & 2)
-                    y = rm->sub_packet_cnt = 0;
-                if (!y)
-                    rm->audiotimestamp = timestamp;
-
-                switch(st->codec->codec_id) {
-                    case CODEC_ID_RA_288:
-                        for (x = 0; x < h/2; x++)
-                            get_buffer(pb, rm->audiobuf+x*2*w+y*cfs, cfs);
-                        break;
-                    case CODEC_ID_ATRAC3:
-                    case CODEC_ID_COOK:
-                        for (x = 0; x < w/sps; x++)
-                            get_buffer(pb, rm->audiobuf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
-                        break;
-                }
-
-                if (++(rm->sub_packet_cnt) < h)
-                    goto resync;
-                else {
-                    rm->sub_packet_cnt = 0;
-                    rm->audio_stream_num = i;
-                    rm->audio_pkt_cnt = h * w / st->codec->block_align - 1;
-                    // Release first audio packet
-                    av_new_packet(pkt, st->codec->block_align);
-                    memcpy(pkt->data, rm->audiobuf, st->codec->block_align);
-                    timestamp = rm->audiotimestamp;
-                    flags = 2; // Mark first packet as keyframe
-                }
-            } else if (st->codec->codec_id == CODEC_ID_AAC) {
-                int x;
-                rm->audio_stream_num = i;
-                rm->sub_packet_cnt = (get_be16(pb) & 0xf0) >> 4;
-                if (rm->sub_packet_cnt) {
-                    for (x = 0; x < rm->sub_packet_cnt; x++)
-                        rm->sub_packet_lengths[x] = get_be16(pb);
-                    // Release first audio packet
-                    rm->audio_pkt_cnt = rm->sub_packet_cnt - 1;
-                    av_get_packet(pb, pkt, rm->sub_packet_lengths[0]);
-                    flags = 2; // Mark first packet as keyframe
-                }
-            } else
-                av_get_packet(pb, pkt, len);
-
-        } else
-            av_get_packet(pb, pkt, len);
-
-        if(  (st->discard >= AVDISCARD_NONKEY && !(flags&2))
-           || st->discard >= AVDISCARD_ALL){
-            av_free_packet(pkt);
-            goto resync;
-        }
-
-        pkt->stream_index = i;
-
-#if 0
-        if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
-            if(st->codec->codec_id == CODEC_ID_RV20){
-                int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
-                av_log(NULL, AV_LOG_DEBUG, "%d %"PRId64" %d\n", timestamp, timestamp*512LL/25, seq);
-
-                seq |= (timestamp&~0x3FFF);
-                if(seq - timestamp >  0x2000) seq -= 0x4000;
-                if(seq - timestamp < -0x2000) seq += 0x4000;
-            }
-        }
-#endif
-        pkt->pts= timestamp;
-        if(flags&2){
-            pkt->flags |= PKT_FLAG_KEY;
-            if((seq&0x7F) == 1)
-                av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
-        }
-    }
-
-    /* for AC3, needs to swap bytes */
-    if (st->codec->codec_id == CODEC_ID_AC3) {
-        ptr = pkt->data;
-        for(j=0;j<len;j+=2) {
-            tmp = ptr[0];
-            ptr[0] = ptr[1];
-            ptr[1] = tmp;
-                ptr += 2;
-        }
-    }
-    return 0;
-}
-
-static int rm_read_close(AVFormatContext *s)
-{
-    RMContext *rm = s->priv_data;
-
-    av_free(rm->audiobuf);
-    return 0;
-}
-
-static int rm_probe(AVProbeData *p)
-{
-    /* check file header */
-    if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
-         p->buf[2] == 'M' && p->buf[3] == 'F' &&
-         p->buf[4] == 0 && p->buf[5] == 0) ||
-        (p->buf[0] == '.' && p->buf[1] == 'r' &&
-         p->buf[2] == 'a' && p->buf[3] == 0xfd))
-        return AVPROBE_SCORE_MAX;
-    else
-        return 0;
-}
-
-static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
-                               int64_t *ppos, int64_t pos_limit)
-{
-    RMContext *rm = s->priv_data;
-    int64_t pos, dts;
-    int stream_index2, flags, len, h;
-
-    pos = *ppos;
-
-    if(rm->old_format)
-        return AV_NOPTS_VALUE;
-
-    url_fseek(&s->pb, pos, SEEK_SET);
-    rm->remaining_len=0;
-    for(;;){
-        int seq=1;
-        AVStream *st;
-
-        len=sync(s, &dts, &flags, &stream_index2, &pos);
-        if(len<0)
-            return AV_NOPTS_VALUE;
-
-        st = s->streams[stream_index2];
-        if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
-            h= get_byte(&s->pb); len--;
-            if(!(h & 0x40)){
-                seq = get_byte(&s->pb); len--;
-            }
-        }
-
-        if((flags&2) && (seq&0x7F) == 1){
-//            av_log(s, AV_LOG_DEBUG, "%d %d-%d %"PRId64" %d\n", flags, stream_index2, stream_index, dts, seq);
-            av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
-            if(stream_index2 == stream_index)
-                break;
-        }
-
-        url_fskip(&s->pb, len);
-    }
-    *ppos = pos;
-    return dts;
-}
-
-#ifdef CONFIG_RM_DEMUXER
-AVInputFormat rm_demuxer = {
-    "rm",
-    "rm format",
-    sizeof(RMContext),
-    rm_probe,
-    rm_read_header,
-    rm_read_packet,
-    rm_read_close,
-    NULL,
-    rm_read_dts,
+const char * const ff_rm_metadata[4] = {
+    "title",
+    "author",
+    "copyright",
+    "comment"
 };
-#endif
-#ifdef CONFIG_RM_MUXER
-AVOutputFormat rm_muxer = {
-    "rm",
-    "rm format",
-    "application/vnd.rn-realmedia",
-    "rm,ra",
-    sizeof(RMContext),
-    CODEC_ID_AC3,
-    CODEC_ID_RV10,
-    rm_write_header,
-    rm_write_packet,
-    rm_write_trailer,
+
+const AVCodecTag ff_rm_codec_tags[] = {
+    { AV_CODEC_ID_RV10,   MKTAG('R','V','1','0') },
+    { AV_CODEC_ID_RV20,   MKTAG('R','V','2','0') },
+    { AV_CODEC_ID_RV20,   MKTAG('R','V','T','R') },
+    { AV_CODEC_ID_RV30,   MKTAG('R','V','3','0') },
+    { AV_CODEC_ID_RV40,   MKTAG('R','V','4','0') },
+    { AV_CODEC_ID_AC3,    MKTAG('d','n','e','t') },
+    { AV_CODEC_ID_RA_144, MKTAG('l','p','c','J') },
+    { AV_CODEC_ID_RA_288, MKTAG('2','8','_','8') },
+    { AV_CODEC_ID_COOK,   MKTAG('c','o','o','k') },
+    { AV_CODEC_ID_ATRAC3, MKTAG('a','t','r','c') },
+    { AV_CODEC_ID_SIPR,   MKTAG('s','i','p','r') },
+    { AV_CODEC_ID_AAC,    MKTAG('r','a','a','c') },
+    { AV_CODEC_ID_AAC,    MKTAG('r','a','c','p') },
+    { AV_CODEC_ID_RALF,   MKTAG('L','S','D',':') },
+    { AV_CODEC_ID_NONE },
 };
-#endif