split asf patch by (Konstantin Andreyev <kandreyev at bcsii dot com>)

Originally committed as revision 2850 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 4 insertions, 681 deletions

diff --git a/libavformat/asf.c b/libavformat/asf.c
index bcc0f1a26a..ab80eb4d36 100644
--- a/libavformat/asf.c
+++ b/libavformat/asf.c
@@ -1,5 +1,5 @@
 /*
- * ASF compatible encoder and decoder.
+ * ASF compatible decoder.
  * Copyright (c) 2000, 2001 Fabrice Bellard.
  *
  * This library is free software; you can redistribute it and/or
@@ -19,661 +19,15 @@
 #include "avformat.h"
 #include "avi.h"
 #include "mpegaudio.h"
+#include "asf.h"
 
 #undef NDEBUG
 #include <assert.h>
 
-#define PACKET_SIZE 3200
-#define PACKET_HEADER_SIZE 12
-#define FRAME_HEADER_SIZE 17
-
-typedef struct {
-    int num;
-    int seq;
-    /* use for reading */
-    AVPacket pkt;
-    int frag_offset;
-    int timestamp;
-    int64_t duration;
-
-    int ds_span;		/* descrambling  */
-    int ds_packet_size;
-    int ds_chunk_size;
-    int ds_data_size;
-    int ds_silence_data;
-    
-    int packet_pos;
-
-} ASFStream;
-
-typedef struct {
-    uint32_t v1;
-    uint16_t v2;
-    uint16_t v3;
-    uint8_t v4[8];
-} GUID;
-
-typedef struct {
-    GUID guid;			// generated by client computer
-    uint64_t file_size;		// in bytes
-                                // invalid if broadcasting
-    uint64_t create_time;	// time of creation, in 100-nanosecond units since 1.1.1601
-                                // invalid if broadcasting
-    uint64_t packets_count;	// how many packets are there in the file
-                                // invalid if broadcasting
-    uint64_t play_time;		// play time, in 100-nanosecond units
-                                // invalid if broadcasting
-    uint64_t send_time;		// time to send file, in 100-nanosecond units
-                                // invalid if broadcasting (could be ignored)
-    uint32_t preroll;		// timestamp of the first packet, in milliseconds
-    				// if nonzero - substract from time
-    uint32_t ignore;            // preroll is 64bit - but let's just ignore it
-    uint32_t flags;		// 0x01 - broadcast
-    				// 0x02 - seekable
-                                // rest is reserved should be 0
-    uint32_t min_pktsize;	// size of a data packet
-                                // invalid if broadcasting
-    uint32_t max_pktsize;	// shall be the same as for min_pktsize
-                                // invalid if broadcasting
-    uint32_t max_bitrate;	// bandwith of stream in bps
-    				// should be the sum of bitrates of the
-                                // individual media streams
-} ASFMainHeader;
-
-
-typedef struct {
-    int seqno;
-    int packet_size;
-    int is_streamed;
-    int asfid2avid[128];        /* conversion table from asf ID 2 AVStream ID */
-    ASFStream streams[128];	/* it's max number and it's not that big */
-    /* non streamed additonnal info */
-    int64_t nb_packets;
-    int64_t duration; /* in 100ns units */
-    /* packet filling */
-    int packet_size_left;
-    int packet_timestamp_start;
-    int packet_timestamp_end;
-    int packet_nb_frames;
-    uint8_t packet_buf[PACKET_SIZE];
-    ByteIOContext pb;
-    /* only for reading */
-    uint64_t data_offset; /* begining of the first data packet */
-
-    ASFMainHeader hdr;
-
-    int packet_flags;
-    int packet_property;
-    int packet_timestamp;
-    int packet_segsizetype;
-    int packet_segments;
-    int packet_seq;
-    int packet_replic_size;
-    int packet_key_frame;
-    int packet_padsize;
-    int packet_frag_offset;
-    int packet_frag_size;
-    int packet_frag_timestamp;
-    int packet_multi_size;
-    int packet_obj_size;
-    int packet_time_delta;
-    int packet_time_start;
-    int packet_pos;
-
-    int stream_index;
-    ASFStream* asf_st; /* currently decoded stream */
-} ASFContext;
-
-static const GUID asf_header = {
-    0x75B22630, 0x668E, 0x11CF, { 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C },
-};
-
-static const GUID file_header = {
-    0x8CABDCA1, 0xA947, 0x11CF, { 0x8E, 0xE4, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 },
-};
-
-static const GUID stream_header = {
-    0xB7DC0791, 0xA9B7, 0x11CF, { 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 },
-};
-
-static const GUID audio_stream = {
-    0xF8699E40, 0x5B4D, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
-};
-
-static const GUID audio_conceal_none = {
-    // 0x49f1a440, 0x4ece, 0x11d0, { 0xa3, 0xac, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6 },
-    // New value lifted from avifile
-    0x20fb5700, 0x5b55, 0x11cf, { 0xa8, 0xfd, 0x00, 0x80, 0x5f, 0x5c, 0x44, 0x2b },
-};
-
-static const GUID video_stream = {
-    0xBC19EFC0, 0x5B4D, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
-};
-
-static const GUID video_conceal_none = {
-    0x20FB5700, 0x5B55, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
-};
-
-
-static const GUID comment_header = {
-    0x75b22633, 0x668e, 0x11cf, { 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c },
-};
-
-static const GUID codec_comment_header = {
-    0x86D15240, 0x311D, 0x11D0, { 0xA3, 0xA4, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 },
-};
-static const GUID codec_comment1_header = {
-    0x86d15241, 0x311d, 0x11d0, { 0xa3, 0xa4, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6 },
-};
-
-static const GUID data_header = {
-    0x75b22636, 0x668e, 0x11cf, { 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c },
-};
-
 static const GUID index_guid = {
     0x33000890, 0xe5b1, 0x11cf, { 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb },
 };
 
-static const GUID head1_guid = {
-    0x5fbf03b5, 0xa92e, 0x11cf, { 0x8e, 0xe3, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65 },
-};
-
-static const GUID head2_guid = {
-    0xabd3d211, 0xa9ba, 0x11cf, { 0x8e, 0xe6, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65 },
-};
-
-static const GUID extended_content_header = {
-        0xD2D0A440, 0xE307, 0x11D2, { 0x97, 0xF0, 0x00, 0xA0, 0xC9, 0x5E, 0xA8, 0x50 },
-};
-
-/* I am not a number !!! This GUID is the one found on the PC used to
-   generate the stream */
-static const GUID my_guid = {
-    0, 0, 0, { 0, 0, 0, 0, 0, 0, 0, 0 },
-};
-
-#ifdef CONFIG_ENCODERS
-static void put_guid(ByteIOContext *s, const GUID *g)
-{
-    int i;
-
-    put_le32(s, g->v1);
-    put_le16(s, g->v2);
-    put_le16(s, g->v3);
-    for(i=0;i<8;i++)
-        put_byte(s, g->v4[i]);
-}
-
-static void put_str16(ByteIOContext *s, const char *tag)
-{
-    int c;
-
-    put_le16(s,strlen(tag) + 1);
-    for(;;) {
-        c = (uint8_t)*tag++;
-        put_le16(s, c);
-        if (c == '\0')
-            break;
-    }
-}
-
-static void put_str16_nolen(ByteIOContext *s, const char *tag)
-{
-    int c;
-
-    for(;;) {
-        c = (uint8_t)*tag++;
-        put_le16(s, c);
-        if (c == '\0')
-            break;
-    }
-}
-
-static int64_t put_header(ByteIOContext *pb, const GUID *g)
-{
-    int64_t pos;
-
-    pos = url_ftell(pb);
-    put_guid(pb, g);
-    put_le64(pb, 24);
-    return pos;
-}
-
-/* update header size */
-static void end_header(ByteIOContext *pb, int64_t pos)
-{
-    int64_t pos1;
-
-    pos1 = url_ftell(pb);
-    url_fseek(pb, pos + 16, SEEK_SET);
-    put_le64(pb, pos1 - pos);
-    url_fseek(pb, pos1, SEEK_SET);
-}
-
-/* write an asf chunk (only used in streaming case) */
-static void put_chunk(AVFormatContext *s, int type, int payload_length, int flags)
-{
-    ASFContext *asf = s->priv_data;
-    ByteIOContext *pb = &s->pb;
-    int length;
-
-    length = payload_length + 8;
-    put_le16(pb, type);
-    put_le16(pb, length);
-    put_le32(pb, asf->seqno);
-    put_le16(pb, flags); /* unknown bytes */
-    put_le16(pb, length);
-    asf->seqno++;
-}
-
-/* convert from unix to windows time */
-static int64_t unix_to_file_time(int ti)
-{
-    int64_t t;
-
-    t = ti * int64_t_C(10000000);
-    t += int64_t_C(116444736000000000);
-    return t;
-}
-
-/* write the header (used two times if non streamed) */
-static int asf_write_header1(AVFormatContext *s, int64_t file_size, int64_t data_chunk_size)
-{
-    ASFContext *asf = s->priv_data;
-    ByteIOContext *pb = &s->pb;
-    int header_size, n, extra_size, extra_size2, wav_extra_size, file_time;
-    int has_title;
-    AVCodecContext *enc;
-    int64_t header_offset, cur_pos, hpos;
-    int bit_rate;
-
-    has_title = (s->title[0] || s->author[0] || s->copyright[0] || s->comment[0]);
-
-    bit_rate = 0;
-    for(n=0;n<s->nb_streams;n++) {
-        enc = &s->streams[n]->codec;
-
-        bit_rate += enc->bit_rate;
-    }
-
-    if (asf->is_streamed) {
-        put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */
-    }
-
-    put_guid(pb, &asf_header);
-    put_le64(pb, -1); /* header length, will be patched after */
-    put_le32(pb, 3 + has_title + s->nb_streams); /* number of chunks in header */
-    put_byte(pb, 1); /* ??? */
-    put_byte(pb, 2); /* ??? */
-
-    /* file header */
-    header_offset = url_ftell(pb);
-    hpos = put_header(pb, &file_header);
-    put_guid(pb, &my_guid);
-    put_le64(pb, file_size);
-    file_time = 0;
-    put_le64(pb, unix_to_file_time(file_time));
-    put_le64(pb, asf->nb_packets); /* number of packets */
-    put_le64(pb, asf->duration); /* end time stamp (in 100ns units) */
-    put_le64(pb, asf->duration); /* duration (in 100ns units) */
-    put_le32(pb, 0); /* start time stamp */
-    put_le32(pb, 0); /* ??? */
-    put_le32(pb, asf->is_streamed ? 1 : 0); /* ??? */
-    put_le32(pb, asf->packet_size); /* packet size */
-    put_le32(pb, asf->packet_size); /* packet size */
-    put_le32(pb, bit_rate); /* Nominal data rate in bps */
-    end_header(pb, hpos);
-
-    /* unknown headers */
-    hpos = put_header(pb, &head1_guid);
-    put_guid(pb, &head2_guid);
-    put_le32(pb, 6);
-    put_le16(pb, 0);
-    end_header(pb, hpos);
-
-    /* title and other infos */
-    if (has_title) {
-        hpos = put_header(pb, &comment_header);
-        put_le16(pb, 2 * (strlen(s->title) + 1));
-        put_le16(pb, 2 * (strlen(s->author) + 1));
-        put_le16(pb, 2 * (strlen(s->copyright) + 1));
-        put_le16(pb, 2 * (strlen(s->comment) + 1));
-        put_le16(pb, 0);
-        put_str16_nolen(pb, s->title);
-        put_str16_nolen(pb, s->author);
-        put_str16_nolen(pb, s->copyright);
-        put_str16_nolen(pb, s->comment);
-        end_header(pb, hpos);
-    }
-
-    /* stream headers */
-    for(n=0;n<s->nb_streams;n++) {
-        int64_t es_pos;
-        //        ASFStream *stream = &asf->streams[n];
-
-        enc = &s->streams[n]->codec;
-        asf->streams[n].num = n + 1;
-        asf->streams[n].seq = 0;
-
-        switch(enc->codec_type) {
-        case CODEC_TYPE_AUDIO:
-            wav_extra_size = 0;
-            extra_size = 18 + wav_extra_size;
-            extra_size2 = 0;
-            break;
-        default:
-        case CODEC_TYPE_VIDEO:
-            wav_extra_size = 0;
-            extra_size = 0x33;
-            extra_size2 = 0;
-            break;
-        }
-
-        hpos = put_header(pb, &stream_header);
-        if (enc->codec_type == CODEC_TYPE_AUDIO) {
-            put_guid(pb, &audio_stream);
-            put_guid(pb, &audio_conceal_none);
-        } else {
-            put_guid(pb, &video_stream);
-            put_guid(pb, &video_conceal_none);
-        }
-        put_le64(pb, 0); /* ??? */
-        es_pos = url_ftell(pb);
-        put_le32(pb, extra_size); /* wav header len */
-        put_le32(pb, extra_size2); /* additional data len */
-        put_le16(pb, n + 1); /* stream number */
-        put_le32(pb, 0); /* ??? */
-
-        if (enc->codec_type == CODEC_TYPE_AUDIO) {
-            /* WAVEFORMATEX header */
-            int wavsize = put_wav_header(pb, enc);
-
-            if (wavsize < 0)
-                return -1;
-            if (wavsize != extra_size) {
-                cur_pos = url_ftell(pb);
-                url_fseek(pb, es_pos, SEEK_SET);
-                put_le32(pb, wavsize); /* wav header len */
-                url_fseek(pb, cur_pos, SEEK_SET);
-            }
-        } else {
-            put_le32(pb, enc->width);
-            put_le32(pb, enc->height);
-            put_byte(pb, 2); /* ??? */
-            put_le16(pb, 40); /* size */
-
-            /* BITMAPINFOHEADER header */
-            put_bmp_header(pb, enc, codec_bmp_tags, 1);
-        }
-        end_header(pb, hpos);
-    }
-
-    /* media comments */
-
-    hpos = put_header(pb, &codec_comment_header);
-    put_guid(pb, &codec_comment1_header);
-    put_le32(pb, s->nb_streams);
-    for(n=0;n<s->nb_streams;n++) {
-        AVCodec *p;
-
-        enc = &s->streams[n]->codec;
-        p = avcodec_find_encoder(enc->codec_id);
-
-        put_le16(pb, asf->streams[n].num);
-        put_str16(pb, p ? p->name : enc->codec_name);
-        put_le16(pb, 0); /* no parameters */
-        
-        
-        /* id */
-        if (enc->codec_type == CODEC_TYPE_AUDIO) {
-            put_le16(pb, 2);
-            if(!enc->codec_tag)
-                enc->codec_tag = codec_get_tag(codec_wav_tags, enc->codec_id);
-            if(!enc->codec_tag)
-                return -1;
-            put_le16(pb, enc->codec_tag);
-        } else {
-            put_le16(pb, 4);
-            if(!enc->codec_tag)
-                enc->codec_tag = codec_get_tag(codec_bmp_tags, enc->codec_id);
-            if(!enc->codec_tag)
-                return -1;
-            put_le32(pb, enc->codec_tag);
-        }
-    }
-    end_header(pb, hpos);
-
-    /* patch the header size fields */
-
-    cur_pos = url_ftell(pb);
-    header_size = cur_pos - header_offset;
-    if (asf->is_streamed) {
-        header_size += 8 + 30 + 50;
-
-        url_fseek(pb, header_offset - 10 - 30, SEEK_SET);
-        put_le16(pb, header_size);
-        url_fseek(pb, header_offset - 2 - 30, SEEK_SET);
-        put_le16(pb, header_size);
-
-        header_size -= 8 + 30 + 50;
-    }
-    header_size += 24 + 6;
-    url_fseek(pb, header_offset - 14, SEEK_SET);
-    put_le64(pb, header_size);
-    url_fseek(pb, cur_pos, SEEK_SET);
-
-    /* movie chunk, followed by packets of packet_size */
-    asf->data_offset = cur_pos;
-    put_guid(pb, &data_header);
-    put_le64(pb, data_chunk_size);
-    put_guid(pb, &my_guid);
-    put_le64(pb, asf->nb_packets); /* nb packets */
-    put_byte(pb, 1); /* ??? */
-    put_byte(pb, 1); /* ??? */
-    return 0;
-}
-
-static int asf_write_header(AVFormatContext *s)
-{
-    ASFContext *asf = s->priv_data;
-
-    av_set_pts_info(s, 32, 1, 1000); /* 32 bit pts in ms */
-
-    asf->packet_size = PACKET_SIZE;
-    asf->nb_packets = 0;
-
-    if (asf_write_header1(s, 0, 50) < 0) {
-        //av_free(asf);
-        return -1;
-    }
-
-    put_flush_packet(&s->pb);
-
-    asf->packet_nb_frames = 0;
-    asf->packet_timestamp_start = -1;
-    asf->packet_timestamp_end = -1;
-    asf->packet_size_left = asf->packet_size - PACKET_HEADER_SIZE;
-    init_put_byte(&asf->pb, asf->packet_buf, asf->packet_size, 1,
-                  NULL, NULL, NULL, NULL);
-
-    return 0;
-}
-
-static int asf_write_stream_header(AVFormatContext *s)
-{
-    ASFContext *asf = s->priv_data;
-
-    asf->is_streamed = 1;
-
-    return asf_write_header(s);
-}
-
-/* write a fixed size packet */
-static int put_packet(AVFormatContext *s,
-                       unsigned int timestamp, unsigned int duration,
-                       int nb_frames, int padsize)
-{
-    ASFContext *asf = s->priv_data;
-    ByteIOContext *pb = &s->pb;
-    int flags;
-
-    if (asf->is_streamed) {
-        put_chunk(s, 0x4424, asf->packet_size, 0);
-    }
-
-    put_byte(pb, 0x82);
-    put_le16(pb, 0);
-
-    flags = 0x01; /* nb segments present */
-    if (padsize > 0) {
-        if (padsize < 256)
-            flags |= 0x08;
-        else
-            flags |= 0x10;
-    }
-    put_byte(pb, flags); /* flags */
-    put_byte(pb, 0x5d);
-    if (flags & 0x10)
-        put_le16(pb, padsize - 2);
-    if (flags & 0x08)
-        put_byte(pb, padsize - 1);
-    put_le32(pb, timestamp);
-    put_le16(pb, duration);
-    put_byte(pb, nb_frames | 0x80);
-
-    return PACKET_HEADER_SIZE + ((flags & 0x18) >> 3);
-}
-
-static void flush_packet(AVFormatContext *s)
-{
-    ASFContext *asf = s->priv_data;
-    int hdr_size, ptr;
-
-    hdr_size = put_packet(s, asf->packet_timestamp_start,
-               asf->packet_timestamp_end - asf->packet_timestamp_start,
-               asf->packet_nb_frames, asf->packet_size_left);
-
-    /* Clear out the padding bytes */
-    ptr = asf->packet_size - hdr_size - asf->packet_size_left;
-    memset(asf->packet_buf + ptr, 0, asf->packet_size_left);
-
-    put_buffer(&s->pb, asf->packet_buf, asf->packet_size - hdr_size);
-
-    put_flush_packet(&s->pb);
-    asf->nb_packets++;
-    asf->packet_nb_frames = 0;
-    asf->packet_timestamp_start = -1;
-    asf->packet_timestamp_end = -1;
-    asf->packet_size_left = asf->packet_size - PACKET_HEADER_SIZE;
-    init_put_byte(&asf->pb, asf->packet_buf, asf->packet_size, 1,
-                  NULL, NULL, NULL, NULL);
-}
-
-static void put_frame_header(AVFormatContext *s, ASFStream *stream, int timestamp,
-                             int payload_size, int frag_offset, int frag_len)
-{
-    ASFContext *asf = s->priv_data;
-    ByteIOContext *pb = &asf->pb;
-    int val;
-
-    val = stream->num;
-    if (s->streams[val - 1]->codec.coded_frame->key_frame /* && frag_offset == 0 */)
-        val |= 0x80;
-    put_byte(pb, val);
-    put_byte(pb, stream->seq);
-    put_le32(pb, frag_offset); /* fragment offset */
-    put_byte(pb, 0x08); /* flags */
-    put_le32(pb, payload_size);
-    put_le32(pb, timestamp);
-    put_le16(pb, frag_len);
-}
-
-
-/* Output a frame. We suppose that payload_size <= PACKET_SIZE.
-
-   It is there that you understand that the ASF format is really
-   crap. They have misread the MPEG Systems spec !
- */
-static void put_frame(AVFormatContext *s, ASFStream *stream, int timestamp,
-                      const uint8_t *buf, int payload_size)
-{
-    ASFContext *asf = s->priv_data;
-    int frag_pos, frag_len, frag_len1;
-
-    frag_pos = 0;
-    while (frag_pos < payload_size) {
-        frag_len = payload_size - frag_pos;
-        frag_len1 = asf->packet_size_left - FRAME_HEADER_SIZE;
-        if (frag_len1 > 0) {
-            if (frag_len > frag_len1)
-                frag_len = frag_len1;
-            put_frame_header(s, stream, timestamp+1, payload_size, frag_pos, frag_len);
-            put_buffer(&asf->pb, buf, frag_len);
-            asf->packet_size_left -= (frag_len + FRAME_HEADER_SIZE);
-            asf->packet_timestamp_end = timestamp;
-            if (asf->packet_timestamp_start == -1)
-                asf->packet_timestamp_start = timestamp;
-            asf->packet_nb_frames++;
-        } else {
-            frag_len = 0;
-        }
-        frag_pos += frag_len;
-        buf += frag_len;
-        /* output the frame if filled */
-        if (asf->packet_size_left <= FRAME_HEADER_SIZE)
-            flush_packet(s);
-    }
-    stream->seq++;
-}
-
-
-static int asf_write_packet(AVFormatContext *s, int stream_index,
-                            const uint8_t *buf, int size, int64_t timestamp)
-{
-    ASFContext *asf = s->priv_data;
-    ASFStream *stream;
-    int64_t duration;
-    AVCodecContext *codec;
-
-    codec = &s->streams[stream_index]->codec;
-    stream = &asf->streams[stream_index];
-
-    if (codec->codec_type == CODEC_TYPE_AUDIO) {
-        duration = (codec->frame_number * codec->frame_size * int64_t_C(10000000)) /
-            codec->sample_rate;
-    } else {
-        duration = av_rescale(codec->frame_number * codec->frame_rate_base, 10000000, codec->frame_rate);
-    }
-    if (duration > asf->duration)
-        asf->duration = duration;
-
-    put_frame(s, stream, timestamp, buf, size);
-    return 0;
-}
-
-static int asf_write_trailer(AVFormatContext *s)
-{
-    ASFContext *asf = s->priv_data;
-    int64_t file_size;
-
-    /* flush the current packet */
-    if (asf->pb.buf_ptr > asf->pb.buffer)
-        flush_packet(s);
-
-    if (asf->is_streamed) {
-        put_chunk(s, 0x4524, 0, 0); /* end of stream */
-    } else {
-        /* rewrite an updated header */
-        file_size = url_ftell(&s->pb);
-        url_fseek(&s->pb, 0, SEEK_SET);
-        asf_write_header1(s, file_size, file_size - asf->data_offset);
-    }
-
-    put_flush_packet(&s->pb);
-    return 0;
-}
-#endif //CONFIG_ENCODERS
-
 /**********************************/
 /* decoding */
 
@@ -1520,39 +874,8 @@ static AVInputFormat asf_iformat = {
 };
 
 #ifdef CONFIG_ENCODERS
-static AVOutputFormat asf_oformat = {
-    "asf",
-    "asf format",
-    "video/x-ms-asf",
-    "asf,wmv",
-    sizeof(ASFContext),
-#ifdef CONFIG_MP3LAME
-    CODEC_ID_MP3,
-#else
-    CODEC_ID_MP2,
-#endif
-    CODEC_ID_MSMPEG4V3,
-    asf_write_header,
-    asf_write_packet,
-    asf_write_trailer,
-};
-
-static AVOutputFormat asf_stream_oformat = {
-    "asf_stream",
-    "asf format",
-    "video/x-ms-asf",
-    "asf,wmv",
-    sizeof(ASFContext),
-#ifdef CONFIG_MP3LAME
-    CODEC_ID_MP3,
-#else
-    CODEC_ID_MP2,
-#endif
-    CODEC_ID_MSMPEG4V3,
-    asf_write_stream_header,
-    asf_write_packet,
-    asf_write_trailer,
-};
+    extern AVOutputFormat asf_oformat;
+    extern AVOutputFormat asf_stream_oformat;
 #endif //CONFIG_ENCODERS
 
 int asf_init(void)