X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=synfig-core%2Ftags%2Fsynfig_0_61_05%2Fsynfig-core%2Fsrc%2Fmodules%2Fmod_libavcodec%2Flibavformat%2Fmpeg.c;fp=synfig-core%2Ftags%2Fsynfig_0_61_05%2Fsynfig-core%2Fsrc%2Fmodules%2Fmod_libavcodec%2Flibavformat%2Fmpeg.c;h=98103a6b285c4dfc14fe8947b99842185d0522ca;hb=299aecad571ca490ce017004a0d7e555d6df0520;hp=0000000000000000000000000000000000000000;hpb=42861dc634bef4059ca95e5292033315a0b9ce30;p=synfig.git

diff --git a/synfig-core/tags/synfig_0_61_05/synfig-core/src/modules/mod_libavcodec/libavformat/mpeg.c b/synfig-core/tags/synfig_0_61_05/synfig-core/src/modules/mod_libavcodec/libavformat/mpeg.c
new file mode 100644
index 0000000..98103a6
--- /dev/null
+++ b/synfig-core/tags/synfig_0_61_05/synfig-core/src/modules/mod_libavcodec/libavformat/mpeg.c
@@ -0,0 +1,710 @@
+/*
+ * MPEG1/2 mux/demux
+ * Copyright (c) 2000, 2001, 2002 Fabrice Bellard.
+ *
+ * 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
+ */
+#include "avformat.h"
+
+#define MAX_PAYLOAD_SIZE 4096
+#define NB_STREAMS 2
+
+typedef struct {
+    uint8_t buffer[MAX_PAYLOAD_SIZE];
+    int buffer_ptr;
+    uint8_t id;
+    int max_buffer_size; /* in bytes */
+    int packet_number;
+    int64_t start_pts;
+} StreamInfo;
+
+typedef struct {
+    int packet_size; /* required packet size */
+    int packet_data_max_size; /* maximum data size inside a packet */
+    int packet_number;
+    int pack_header_freq;     /* frequency (in packets^-1) at which we send pack headers */
+    int system_header_freq;
+    int mux_rate; /* bitrate in units of 50 bytes/s */
+    /* stream info */
+    int audio_bound;
+    int video_bound;
+    int is_mpeg2;
+    int is_vcd;
+} MpegMuxContext;
+
+#define PACK_START_CODE             ((unsigned int)0x000001ba)
+#define SYSTEM_HEADER_START_CODE    ((unsigned int)0x000001bb)
+#define SEQUENCE_END_CODE           ((unsigned int)0x000001b7)
+#define PACKET_START_CODE_MASK      ((unsigned int)0xffffff00)
+#define PACKET_START_CODE_PREFIX    ((unsigned int)0x00000100)
+#define ISO_11172_END_CODE          ((unsigned int)0x000001b9)
+  
+/* mpeg2 */
+#define PROGRAM_STREAM_MAP 0x1bc
+#define PRIVATE_STREAM_1   0x1bd
+#define PADDING_STREAM     0x1be
+#define PRIVATE_STREAM_2   0x1bf
+
+
+#define AUDIO_ID 0xc0
+#define VIDEO_ID 0xe0
+
+extern AVOutputFormat mpeg1system_mux;
+extern AVOutputFormat mpeg1vcd_mux;
+extern AVOutputFormat mpeg2vob_mux;
+
+static int put_pack_header(AVFormatContext *ctx, 
+                           uint8_t *buf, int64_t timestamp)
+{
+    MpegMuxContext *s = ctx->priv_data;
+    PutBitContext pb;
+    
+    init_put_bits(&pb, buf, 128, NULL, NULL);
+
+    put_bits(&pb, 32, PACK_START_CODE);
+    if (s->is_mpeg2) {
+        put_bits(&pb, 2, 0x1);
+    } else {
+        put_bits(&pb, 4, 0x2);
+    }
+    put_bits(&pb, 3, (uint32_t)((timestamp >> 30) & 0x07));
+    put_bits(&pb, 1, 1);
+    put_bits(&pb, 15, (uint32_t)((timestamp >> 15) & 0x7fff));
+    put_bits(&pb, 1, 1);
+    put_bits(&pb, 15, (uint32_t)((timestamp) & 0x7fff));
+    put_bits(&pb, 1, 1);
+    if (s->is_mpeg2) {
+        /* clock extension */
+        put_bits(&pb, 9, 0);
+        put_bits(&pb, 1, 1);
+    }
+    put_bits(&pb, 1, 1);
+    put_bits(&pb, 22, s->mux_rate);
+    put_bits(&pb, 1, 1);
+    if (s->is_mpeg2) {
+        put_bits(&pb, 5, 0x1f); /* reserved */
+        put_bits(&pb, 3, 0); /* stuffing length */
+    }
+    flush_put_bits(&pb);
+    return pbBufPtr(&pb) - pb.buf;
+}
+
+static int put_system_header(AVFormatContext *ctx, uint8_t *buf)
+{
+    MpegMuxContext *s = ctx->priv_data;
+    int size, rate_bound, i, private_stream_coded, id;
+    PutBitContext pb;
+
+    init_put_bits(&pb, buf, 128, NULL, NULL);
+
+    put_bits(&pb, 32, SYSTEM_HEADER_START_CODE);
+    put_bits(&pb, 16, 0);
+    put_bits(&pb, 1, 1);
+    
+    rate_bound = s->mux_rate; /* maximum bit rate of the multiplexed stream */
+    put_bits(&pb, 22, rate_bound);
+    put_bits(&pb, 1, 1); /* marker */
+    put_bits(&pb, 6, s->audio_bound);
+
+    put_bits(&pb, 1, 1); /* variable bitrate */
+    put_bits(&pb, 1, 1); /* non constrainted bit stream */
+    
+    put_bits(&pb, 1, 0); /* audio locked */
+    put_bits(&pb, 1, 0); /* video locked */
+    put_bits(&pb, 1, 1); /* marker */
+
+    put_bits(&pb, 5, s->video_bound);
+    put_bits(&pb, 8, 0xff); /* reserved byte */
+    
+    /* audio stream info */
+    private_stream_coded = 0;
+    for(i=0;i<ctx->nb_streams;i++) {
+        StreamInfo *stream = ctx->streams[i]->priv_data;
+        id = stream->id;
+        if (id < 0xc0) {
+            /* special case for private streams (AC3 use that) */
+            if (private_stream_coded)
+                continue;
+            private_stream_coded = 1;
+            id = 0xbd;
+        }
+        put_bits(&pb, 8, id); /* stream ID */
+        put_bits(&pb, 2, 3);
+        if (id < 0xe0) {
+            /* audio */
+            put_bits(&pb, 1, 0);
+            put_bits(&pb, 13, stream->max_buffer_size / 128);
+        } else {
+            /* video */
+            put_bits(&pb, 1, 1);
+            put_bits(&pb, 13, stream->max_buffer_size / 1024);
+        }
+    }
+    flush_put_bits(&pb);
+    size = pbBufPtr(&pb) - pb.buf;
+    /* patch packet size */
+    buf[4] = (size - 6) >> 8;
+    buf[5] = (size - 6) & 0xff;
+
+    return size;
+}
+
+static int mpeg_mux_init(AVFormatContext *ctx)
+{
+    MpegMuxContext *s = ctx->priv_data;
+    int bitrate, i, mpa_id, mpv_id, ac3_id;
+    AVStream *st;
+    StreamInfo *stream;
+
+    s->packet_number = 0;
+    s->is_vcd = (ctx->oformat == &mpeg1vcd_mux);
+    s->is_mpeg2 = (ctx->oformat == &mpeg2vob_mux);
+    
+    if (s->is_vcd)
+        s->packet_size = 2324; /* VCD packet size */
+    else
+        s->packet_size = 2048;
+        
+    /* startcode(4) + length(2) + flags(1) */
+    s->packet_data_max_size = s->packet_size - 7;
+    s->audio_bound = 0;
+    s->video_bound = 0;
+    mpa_id = AUDIO_ID;
+    ac3_id = 0x80;
+    mpv_id = VIDEO_ID;
+    for(i=0;i<ctx->nb_streams;i++) {
+        st = ctx->streams[i];
+        stream = av_mallocz(sizeof(StreamInfo));
+        if (!stream)
+            goto fail;
+        st->priv_data = stream;
+
+        switch(st->codec.codec_type) {
+        case CODEC_TYPE_AUDIO:
+            if (st->codec.codec_id == CODEC_ID_AC3)
+                stream->id = ac3_id++;
+            else
+                stream->id = mpa_id++;
+            stream->max_buffer_size = 4 * 1024; 
+            s->audio_bound++;
+            break;
+        case CODEC_TYPE_VIDEO:
+            stream->id = mpv_id++;
+            stream->max_buffer_size = 46 * 1024; 
+            s->video_bound++;
+            break;
+        default:
+            av_abort();
+        }
+    }
+
+    /* we increase slightly the bitrate to take into account the
+       headers. XXX: compute it exactly */
+    bitrate = 2000;
+    for(i=0;i<ctx->nb_streams;i++) {
+        st = ctx->streams[i];
+        bitrate += st->codec.bit_rate;
+    }
+    s->mux_rate = (bitrate + (8 * 50) - 1) / (8 * 50);
+    
+    if (s->is_vcd || s->is_mpeg2)
+        /* every packet */
+        s->pack_header_freq = 1;
+    else
+        /* every 2 seconds */
+        s->pack_header_freq = 2 * bitrate / s->packet_size / 8;
+    
+    if (s->is_mpeg2)
+        /* every 200 packets. Need to look at the spec.  */
+        s->system_header_freq = s->pack_header_freq * 40;
+    else if (s->is_vcd)
+        /* every 40 packets, this is my invention */
+        s->system_header_freq = s->pack_header_freq * 40;
+    else
+        s->system_header_freq = s->pack_header_freq * 5;
+    
+    for(i=0;i<ctx->nb_streams;i++) {
+        stream = ctx->streams[i]->priv_data;
+        stream->buffer_ptr = 0;
+        stream->packet_number = 0;
+        stream->start_pts = -1;
+    }
+    return 0;
+ fail:
+    for(i=0;i<ctx->nb_streams;i++) {
+        av_free(ctx->streams[i]->priv_data);
+    }
+    return -ENOMEM;
+}
+
+/* flush the packet on stream stream_index */
+static void flush_packet(AVFormatContext *ctx, int stream_index)
+{
+    MpegMuxContext *s = ctx->priv_data;
+    StreamInfo *stream = ctx->streams[stream_index]->priv_data;
+    uint8_t *buf_ptr;
+    int size, payload_size, startcode, id, len, stuffing_size, i, header_len;
+    int64_t timestamp;
+    uint8_t buffer[128];
+    
+    id = stream->id;
+    timestamp = stream->start_pts;
+
+#if 0
+    printf("packet ID=%2x PTS=%0.3f\n", 
+           id, timestamp / 90000.0);
+#endif
+
+    buf_ptr = buffer;
+    if (((s->packet_number % s->pack_header_freq) == 0)) {
+        /* output pack and systems header if needed */
+        size = put_pack_header(ctx, buf_ptr, timestamp);
+        buf_ptr += size;
+        if ((s->packet_number % s->system_header_freq) == 0) {
+            size = put_system_header(ctx, buf_ptr);
+            buf_ptr += size;
+        }
+    }
+    size = buf_ptr - buffer;
+    put_buffer(&ctx->pb, buffer, size);
+
+    /* packet header */
+    if (s->is_mpeg2) {
+        header_len = 8;
+    } else {
+        header_len = 5;
+    }
+    payload_size = s->packet_size - (size + 6 + header_len);
+    if (id < 0xc0) {
+        startcode = PRIVATE_STREAM_1;
+        payload_size -= 4;
+    } else {
+        startcode = 0x100 + id;
+    }
+    stuffing_size = payload_size - stream->buffer_ptr;
+    if (stuffing_size < 0)
+        stuffing_size = 0;
+
+    put_be32(&ctx->pb, startcode);
+
+    put_be16(&ctx->pb, payload_size + header_len);
+    /* stuffing */
+    for(i=0;i<stuffing_size;i++)
+        put_byte(&ctx->pb, 0xff);
+
+    if (s->is_mpeg2) {
+        put_byte(&ctx->pb, 0x80); /* mpeg2 id */
+        put_byte(&ctx->pb, 0x80); /* flags */
+        put_byte(&ctx->pb, 0x05); /* header len (only pts is included) */
+    }
+    put_byte(&ctx->pb, 
+             (0x02 << 4) | 
+             (((timestamp >> 30) & 0x07) << 1) | 
+             1);
+    put_be16(&ctx->pb, (uint16_t)((((timestamp >> 15) & 0x7fff) << 1) | 1));
+    put_be16(&ctx->pb, (uint16_t)((((timestamp) & 0x7fff) << 1) | 1));
+
+    if (startcode == PRIVATE_STREAM_1) {
+        put_byte(&ctx->pb, id);
+        if (id >= 0x80 && id <= 0xbf) {
+            /* XXX: need to check AC3 spec */
+            put_byte(&ctx->pb, 1);
+            put_byte(&ctx->pb, 0);
+            put_byte(&ctx->pb, 2);
+        }
+    }
+
+    /* output data */
+    put_buffer(&ctx->pb, stream->buffer, payload_size - stuffing_size);
+    put_flush_packet(&ctx->pb);
+    
+    /* preserve remaining data */
+    len = stream->buffer_ptr - payload_size;
+    if (len < 0) 
+        len = 0;
+    memmove(stream->buffer, stream->buffer + stream->buffer_ptr - len, len);
+    stream->buffer_ptr = len;
+
+    s->packet_number++;
+    stream->packet_number++;
+    stream->start_pts = -1;
+}
+
+static int mpeg_mux_write_packet(AVFormatContext *ctx, int stream_index,
+                                 const uint8_t *buf, int size, int64_t pts)
+{
+    MpegMuxContext *s = ctx->priv_data;
+    AVStream *st = ctx->streams[stream_index];
+    StreamInfo *stream = st->priv_data;
+    int len;
+    
+    while (size > 0) {
+        /* set pts */
+        if (stream->start_pts == -1) {
+            stream->start_pts = pts;
+        }
+        len = s->packet_data_max_size - stream->buffer_ptr;
+        if (len > size)
+            len = size;
+        memcpy(stream->buffer + stream->buffer_ptr, buf, len);
+        stream->buffer_ptr += len;
+        buf += len;
+        size -= len;
+        while (stream->buffer_ptr >= s->packet_data_max_size) {
+            /* output the packet */
+            if (stream->start_pts == -1)
+                stream->start_pts = pts;
+            flush_packet(ctx, stream_index);
+        }
+    }
+    return 0;
+}
+
+static int mpeg_mux_end(AVFormatContext *ctx)
+{
+    StreamInfo *stream;
+    int i;
+
+    /* flush each packet */
+    for(i=0;i<ctx->nb_streams;i++) {
+        stream = ctx->streams[i]->priv_data;
+        if (stream->buffer_ptr > 0) {
+            flush_packet(ctx, i);
+        }
+    }
+
+    /* End header according to MPEG1 systems standard. We do not write
+       it as it is usually not needed by decoders and because it
+       complicates MPEG stream concatenation. */
+    //put_be32(&ctx->pb, ISO_11172_END_CODE);
+    //put_flush_packet(&ctx->pb);
+
+    for(i=0;i<ctx->nb_streams;i++)
+        av_freep(&ctx->streams[i]->priv_data);
+
+    return 0;
+}
+
+/*********************************************/
+/* demux code */
+
+#define MAX_SYNC_SIZE 100000
+
+static int mpegps_probe(AVProbeData *p)
+{
+    int code, c, i;
+
+    code = 0xff;
+    /* we search the first start code. If it is a packet start code,
+       then we decide it is mpeg ps. We do not send highest value to
+       give a chance to mpegts */
+    /* NOTE: the search range was restricted to avoid too many false
+       detections */
+
+    if (p->buf_size < 6)
+        return 0;
+
+    for (i = 0; i < 20; i++) {
+        c = p->buf[i];
+        code = (code << 8) | c;
+        if ((code & 0xffffff00) == 0x100) {
+            if (code == PACK_START_CODE ||
+                code == SYSTEM_HEADER_START_CODE ||
+                (code >= 0x1e0 && code <= 0x1ef) ||
+                (code >= 0x1c0 && code <= 0x1df) ||
+                code == PRIVATE_STREAM_2 ||
+                code == PROGRAM_STREAM_MAP ||
+                code == PRIVATE_STREAM_1 ||
+                code == PADDING_STREAM)
+                return AVPROBE_SCORE_MAX - 2;
+            else
+                return 0;
+        }
+    }
+    return 0;
+}
+
+
+typedef struct MpegDemuxContext {
+    int header_state;
+} MpegDemuxContext;
+
+static int find_start_code(ByteIOContext *pb, int *size_ptr, 
+                           uint32_t *header_state)
+{
+    unsigned int state, v;
+    int val, n;
+
+    state = *header_state;
+    n = *size_ptr;
+    while (n > 0) {
+        if (url_feof(pb))
+            break;
+        v = get_byte(pb);
+        n--;
+        if (state == 0x000001) {
+            state = ((state << 8) | v) & 0xffffff;
+            val = state;
+            goto found;
+        }
+        state = ((state << 8) | v) & 0xffffff;
+    }
+    val = -1;
+ found:
+    *header_state = state;
+    *size_ptr = n;
+    return val;
+}
+
+static int mpegps_read_header(AVFormatContext *s,
+                                  AVFormatParameters *ap)
+{
+    MpegDemuxContext *m = s->priv_data;
+    m->header_state = 0xff;
+    /* no need to do more */
+    return 0;
+}
+
+static int64_t get_pts(ByteIOContext *pb, int c)
+{
+    int64_t pts;
+    int val;
+
+    if (c < 0)
+        c = get_byte(pb);
+    pts = (int64_t)((c >> 1) & 0x07) << 30;
+    val = get_be16(pb);
+    pts |= (int64_t)(val >> 1) << 15;
+    val = get_be16(pb);
+    pts |= (int64_t)(val >> 1);
+    return pts;
+}
+
+static int mpegps_read_packet(AVFormatContext *s,
+                                  AVPacket *pkt)
+{
+    MpegDemuxContext *m = s->priv_data;
+    AVStream *st;
+    int len, size, startcode, i, c, flags, header_len, type, codec_id;
+    int64_t pts, dts;
+
+    /* next start code (should be immediately after) */
+ redo:
+    m->header_state = 0xff;
+    size = MAX_SYNC_SIZE;
+    startcode = find_start_code(&s->pb, &size, &m->header_state);
+    //printf("startcode=%x pos=0x%Lx\n", startcode, url_ftell(&s->pb));
+    if (startcode < 0)
+        return -EIO;
+    if (startcode == PACK_START_CODE)
+        goto redo;
+    if (startcode == SYSTEM_HEADER_START_CODE)
+        goto redo;
+    if (startcode == PADDING_STREAM ||
+        startcode == PRIVATE_STREAM_2) {
+        /* skip them */
+        len = get_be16(&s->pb);
+        url_fskip(&s->pb, len);
+        goto redo;
+    }
+    /* find matching stream */
+    if (!((startcode >= 0x1c0 && startcode <= 0x1df) ||
+          (startcode >= 0x1e0 && startcode <= 0x1ef) ||
+          (startcode == 0x1bd)))
+        goto redo;
+
+    len = get_be16(&s->pb);
+    pts = AV_NOPTS_VALUE;
+    dts = AV_NOPTS_VALUE;
+    /* stuffing */
+    for(;;) {
+        c = get_byte(&s->pb);
+        len--;
+        /* XXX: for mpeg1, should test only bit 7 */
+        if (c != 0xff) 
+            break;
+    }
+    if ((c & 0xc0) == 0x40) {
+        /* buffer scale & size */
+        get_byte(&s->pb);
+        c = get_byte(&s->pb);
+        len -= 2;
+    }
+    if ((c & 0xf0) == 0x20) {
+        pts = get_pts(&s->pb, c);
+        len -= 4;
+    } else if ((c & 0xf0) == 0x30) {
+        pts = get_pts(&s->pb, c);
+        dts = get_pts(&s->pb, -1);
+        len -= 9;
+    } else if ((c & 0xc0) == 0x80) {
+        /* mpeg 2 PES */
+        if ((c & 0x30) != 0) {
+            fprintf(stderr, "Encrypted multiplex not handled\n");
+            return -EIO;
+        }
+        flags = get_byte(&s->pb);
+        header_len = get_byte(&s->pb);
+        len -= 2;
+        if (header_len > len)
+            goto redo;
+        if ((flags & 0xc0) == 0x80) {
+            pts = get_pts(&s->pb, -1);
+            header_len -= 5;
+            len -= 5;
+        } if ((flags & 0xc0) == 0xc0) {
+            pts = get_pts(&s->pb, -1);
+            dts = get_pts(&s->pb, -1);
+            header_len -= 10;
+            len -= 10;
+        }
+        len -= header_len;
+        while (header_len > 0) {
+            get_byte(&s->pb);
+            header_len--;
+        }
+    }
+    if (startcode == 0x1bd) {
+        startcode = get_byte(&s->pb);
+        len--;
+        if (startcode >= 0x80 && startcode <= 0xbf) {
+            /* audio: skip header */
+            get_byte(&s->pb);
+            get_byte(&s->pb);
+            get_byte(&s->pb);
+            len -= 3;
+        }
+    }
+
+    /* now find stream */
+    for(i=0;i<s->nb_streams;i++) {
+        st = s->streams[i];
+        if (st->id == startcode)
+            goto found;
+    }
+    if (startcode >= 0x1e0 && startcode <= 0x1ef) {
+        type = CODEC_TYPE_VIDEO;
+        codec_id = CODEC_ID_MPEG1VIDEO;
+    } else if (startcode >= 0x1c0 && startcode <= 0x1df) {
+        type = CODEC_TYPE_AUDIO;
+        codec_id = CODEC_ID_MP2;
+    } else if (startcode >= 0x80 && startcode <= 0x9f) {
+        type = CODEC_TYPE_AUDIO;
+        codec_id = CODEC_ID_AC3;
+    } else if (startcode >= 0xa0 && startcode <= 0xbf) {
+        type = CODEC_TYPE_AUDIO;
+        codec_id = CODEC_ID_PCM_S16BE;
+    } else {
+    skip:
+        /* skip packet */
+        url_fskip(&s->pb, len);
+        goto redo;
+    }
+    /* no stream found: add a new stream */
+    st = av_new_stream(s, startcode);
+    if (!st) 
+        goto skip;
+    st->codec.codec_type = type;
+    st->codec.codec_id = codec_id;
+ found:
+    if (startcode >= 0xa0 && startcode <= 0xbf) {
+        int b1, freq;
+        static const int lpcm_freq_tab[4] = { 48000, 96000, 44100, 32000 };
+
+        /* for LPCM, we just skip the header and consider it is raw
+           audio data */
+        if (len <= 3)
+            goto skip;
+        get_byte(&s->pb); /* emphasis (1), muse(1), reserved(1), frame number(5) */
+        b1 = get_byte(&s->pb); /* quant (2), freq(2), reserved(1), channels(3) */
+        get_byte(&s->pb); /* dynamic range control (0x80 = off) */
+        len -= 3;
+        freq = (b1 >> 4) & 3;
+        st->codec.sample_rate = lpcm_freq_tab[freq];
+        st->codec.channels = 1 + (b1 & 7);
+        st->codec.bit_rate = st->codec.channels * st->codec.sample_rate * 2;
+    }
+    av_new_packet(pkt, len);
+    //printf("\nRead Packet ID: %x PTS: %f Size: %d", startcode,
+    //       (float)pts/90000, len);
+    get_buffer(&s->pb, pkt->data, pkt->size);
+    pkt->pts = pts;
+    pkt->stream_index = st->index;
+    return 0;
+}
+
+static int mpegps_read_close(AVFormatContext *s)
+{
+    return 0;
+}
+
+static AVOutputFormat mpeg1system_mux = {
+    "mpeg",
+    "MPEG1 System format",
+    "video/mpeg",
+    "mpg,mpeg",
+    sizeof(MpegMuxContext),
+    CODEC_ID_MP2,
+    CODEC_ID_MPEG1VIDEO,
+    mpeg_mux_init,
+    mpeg_mux_write_packet,
+    mpeg_mux_end,
+};
+
+static AVOutputFormat mpeg1vcd_mux = {
+    "vcd",
+    "MPEG1 System format (VCD)",
+    "video/mpeg",
+    NULL,
+    sizeof(MpegMuxContext),
+    CODEC_ID_MP2,
+    CODEC_ID_MPEG1VIDEO,
+    mpeg_mux_init,
+    mpeg_mux_write_packet,
+    mpeg_mux_end,
+};
+
+static AVOutputFormat mpeg2vob_mux = {
+    "vob",
+    "MPEG2 PS format (VOB)",
+    "video/mpeg",
+    "vob",
+    sizeof(MpegMuxContext),
+    CODEC_ID_MP2,
+    CODEC_ID_MPEG1VIDEO,
+    mpeg_mux_init,
+    mpeg_mux_write_packet,
+    mpeg_mux_end,
+};
+
+AVInputFormat mpegps_demux = {
+    "mpeg",
+    "MPEG PS format",
+    sizeof(MpegDemuxContext),
+    mpegps_probe,
+    mpegps_read_header,
+    mpegps_read_packet,
+    mpegps_read_close,
+    .flags = AVFMT_NOHEADER,
+};
+
+int mpegps_init(void)
+{
+    av_register_output_format(&mpeg1system_mux);
+    av_register_output_format(&mpeg1vcd_mux);
+    av_register_output_format(&mpeg2vob_mux);
+    av_register_input_format(&mpegps_demux);
+    return 0;
+}