split swf de/muxer

Originally committed as revision 13203 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 0 insertions, 817 deletions

diff --git a/libavformat/swf.c b/libavformat/swf.c
deleted file mode 100644
index 9d7d0f27e0..0000000000
--- a/libavformat/swf.c
+++ /dev/null
@@ -1,817 +0,0 @@
-/*
- * Flash Compatible Streaming Format
- * Copyright (c) 2000 Fabrice Bellard.
- * Copyright (c) 2003 Tinic Uro.
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg 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 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg 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 FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include "libavcodec/bitstream.h"
-#include "avformat.h"
-#include "riff.h"    /* for CodecTag */
-
-/* should have a generic way to indicate probable size */
-#define DUMMY_FILE_SIZE   (100 * 1024 * 1024)
-#define DUMMY_DURATION    600 /* in seconds */
-
-#define TAG_END           0
-#define TAG_SHOWFRAME     1
-#define TAG_DEFINESHAPE   2
-#define TAG_FREECHARACTER 3
-#define TAG_PLACEOBJECT   4
-#define TAG_REMOVEOBJECT  5
-#define TAG_STREAMHEAD    18
-#define TAG_STREAMBLOCK   19
-#define TAG_JPEG2         21
-#define TAG_PLACEOBJECT2  26
-#define TAG_STREAMHEAD2   45
-#define TAG_VIDEOSTREAM   60
-#define TAG_VIDEOFRAME    61
-#define TAG_FILEATTRIBUTES 69
-
-#define TAG_LONG         0x100
-
-/* flags for shape definition */
-#define FLAG_MOVETO      0x01
-#define FLAG_SETFILL0    0x02
-#define FLAG_SETFILL1    0x04
-
-#define AUDIO_FIFO_SIZE 65536
-
-/* character id used */
-#define BITMAP_ID 0
-#define VIDEO_ID 0
-#define SHAPE_ID  1
-
-#undef NDEBUG
-#include <assert.h>
-
-typedef struct {
-    int audio_stream_index;
-    offset_t duration_pos;
-    offset_t tag_pos;
-
-    int samples_per_frame;
-    int sound_samples;
-    int swf_frame_number;
-    int video_frame_number;
-    int frame_rate;
-    int tag;
-
-    uint8_t audio_fifo[AUDIO_FIFO_SIZE];
-    int audio_in_pos;
-
-    int video_type;
-    int audio_type;
-} SWFContext;
-
-static const AVCodecTag swf_codec_tags[] = {
-    {CODEC_ID_FLV1, 0x02},
-    {CODEC_ID_VP6F, 0x04},
-    {0, 0},
-};
-
-static const AVCodecTag swf_audio_codec_tags[] = {
-    {CODEC_ID_PCM_S16LE,  0x00},
-    {CODEC_ID_ADPCM_SWF,  0x01},
-    {CODEC_ID_MP3,        0x02},
-    {CODEC_ID_PCM_S16LE,  0x03},
-  //{CODEC_ID_NELLYMOSER, 0x06},
-    {0, 0},
-};
-
-#ifdef CONFIG_MUXERS
-static void put_swf_tag(AVFormatContext *s, int tag)
-{
-    SWFContext *swf = s->priv_data;
-    ByteIOContext *pb = s->pb;
-
-    swf->tag_pos = url_ftell(pb);
-    swf->tag = tag;
-    /* reserve some room for the tag */
-    if (tag & TAG_LONG) {
-        put_le16(pb, 0);
-        put_le32(pb, 0);
-    } else {
-        put_le16(pb, 0);
-    }
-}
-
-static void put_swf_end_tag(AVFormatContext *s)
-{
-    SWFContext *swf = s->priv_data;
-    ByteIOContext *pb = s->pb;
-    offset_t pos;
-    int tag_len, tag;
-
-    pos = url_ftell(pb);
-    tag_len = pos - swf->tag_pos - 2;
-    tag = swf->tag;
-    url_fseek(pb, swf->tag_pos, SEEK_SET);
-    if (tag & TAG_LONG) {
-        tag &= ~TAG_LONG;
-        put_le16(pb, (tag << 6) | 0x3f);
-        put_le32(pb, tag_len - 4);
-    } else {
-        assert(tag_len < 0x3f);
-        put_le16(pb, (tag << 6) | tag_len);
-    }
-    url_fseek(pb, pos, SEEK_SET);
-}
-
-static inline void max_nbits(int *nbits_ptr, int val)
-{
-    int n;
-
-    if (val == 0)
-        return;
-    val = abs(val);
-    n = 1;
-    while (val != 0) {
-        n++;
-        val >>= 1;
-    }
-    if (n > *nbits_ptr)
-        *nbits_ptr = n;
-}
-
-static void put_swf_rect(ByteIOContext *pb,
-                         int xmin, int xmax, int ymin, int ymax)
-{
-    PutBitContext p;
-    uint8_t buf[256];
-    int nbits, mask;
-
-    init_put_bits(&p, buf, sizeof(buf));
-
-    nbits = 0;
-    max_nbits(&nbits, xmin);
-    max_nbits(&nbits, xmax);
-    max_nbits(&nbits, ymin);
-    max_nbits(&nbits, ymax);
-    mask = (1 << nbits) - 1;
-
-    /* rectangle info */
-    put_bits(&p, 5, nbits);
-    put_bits(&p, nbits, xmin & mask);
-    put_bits(&p, nbits, xmax & mask);
-    put_bits(&p, nbits, ymin & mask);
-    put_bits(&p, nbits, ymax & mask);
-
-    flush_put_bits(&p);
-    put_buffer(pb, buf, pbBufPtr(&p) - p.buf);
-}
-
-static void put_swf_line_edge(PutBitContext *pb, int dx, int dy)
-{
-    int nbits, mask;
-
-    put_bits(pb, 1, 1); /* edge */
-    put_bits(pb, 1, 1); /* line select */
-    nbits = 2;
-    max_nbits(&nbits, dx);
-    max_nbits(&nbits, dy);
-
-    mask = (1 << nbits) - 1;
-    put_bits(pb, 4, nbits - 2); /* 16 bits precision */
-    if (dx == 0) {
-        put_bits(pb, 1, 0);
-        put_bits(pb, 1, 1);
-        put_bits(pb, nbits, dy & mask);
-    } else if (dy == 0) {
-        put_bits(pb, 1, 0);
-        put_bits(pb, 1, 0);
-        put_bits(pb, nbits, dx & mask);
-    } else {
-        put_bits(pb, 1, 1);
-        put_bits(pb, nbits, dx & mask);
-        put_bits(pb, nbits, dy & mask);
-    }
-}
-
-#define FRAC_BITS 16
-
-/* put matrix */
-static void put_swf_matrix(ByteIOContext *pb,
-                           int a, int b, int c, int d, int tx, int ty)
-{
-    PutBitContext p;
-    uint8_t buf[256];
-    int nbits;
-
-    init_put_bits(&p, buf, sizeof(buf));
-
-    put_bits(&p, 1, 1); /* a, d present */
-    nbits = 1;
-    max_nbits(&nbits, a);
-    max_nbits(&nbits, d);
-    put_bits(&p, 5, nbits); /* nb bits */
-    put_bits(&p, nbits, a);
-    put_bits(&p, nbits, d);
-
-    put_bits(&p, 1, 1); /* b, c present */
-    nbits = 1;
-    max_nbits(&nbits, c);
-    max_nbits(&nbits, b);
-    put_bits(&p, 5, nbits); /* nb bits */
-    put_bits(&p, nbits, c);
-    put_bits(&p, nbits, b);
-
-    nbits = 1;
-    max_nbits(&nbits, tx);
-    max_nbits(&nbits, ty);
-    put_bits(&p, 5, nbits); /* nb bits */
-    put_bits(&p, nbits, tx);
-    put_bits(&p, nbits, ty);
-
-    flush_put_bits(&p);
-    put_buffer(pb, buf, pbBufPtr(&p) - p.buf);
-}
-
-/* */
-static int swf_write_header(AVFormatContext *s)
-{
-    SWFContext *swf = s->priv_data;
-    ByteIOContext *pb = s->pb;
-    AVCodecContext *enc, *audio_enc, *video_enc;
-    PutBitContext p;
-    uint8_t buf1[256];
-    int i, width, height, rate, rate_base;
-    int is_avm2;
-
-    swf->audio_in_pos = 0;
-    swf->sound_samples = 0;
-    swf->swf_frame_number = 0;
-    swf->video_frame_number = 0;
-
-    video_enc = NULL;
-    audio_enc = NULL;
-    for(i=0;i<s->nb_streams;i++) {
-        enc = s->streams[i]->codec;
-        if (enc->codec_type == CODEC_TYPE_AUDIO) {
-            if (enc->codec_id == CODEC_ID_MP3) {
-                if (!enc->frame_size) {
-                    av_log(s, AV_LOG_ERROR, "audio frame size not set\n");
-                    return -1;
-                }
-                audio_enc = enc;
-            } else {
-                av_log(s, AV_LOG_ERROR, "SWF muxer only supports MP3\n");
-                return -1;
-            }
-        } else {
-            if (enc->codec_id == CODEC_ID_VP6F ||
-                enc->codec_id == CODEC_ID_FLV1 ||
-                enc->codec_id == CODEC_ID_MJPEG) {
-                video_enc = enc;
-            } else {
-                av_log(s, AV_LOG_ERROR, "SWF muxer only supports VP6, FLV1 and MJPEG\n");
-                return -1;
-            }
-        }
-    }
-
-    if (!video_enc) {
-        /* currently, cannot work correctly if audio only */
-        swf->video_type = 0;
-        width = 320;
-        height = 200;
-        rate = 10;
-        rate_base= 1;
-    } else {
-        swf->video_type = video_enc->codec_id;
-        width = video_enc->width;
-        height = video_enc->height;
-        rate = video_enc->time_base.den;
-        rate_base = video_enc->time_base.num;
-    }
-
-    if (!audio_enc) {
-        swf->audio_type = 0;
-        swf->samples_per_frame = (44100. * rate_base) / rate;
-    } else {
-        swf->audio_type = audio_enc->codec_id;
-        swf->samples_per_frame = (audio_enc->sample_rate * rate_base) / rate;
-    }
-
-    is_avm2 = !strcmp("avm2", s->oformat->name);
-
-    put_tag(pb, "FWS");
-    if (is_avm2) {
-        put_byte(pb, 9);
-    } else if (video_enc && video_enc->codec_id == CODEC_ID_VP6F) {
-        put_byte(pb, 8); /* version (version 8 and above support VP6 codec) */
-    } else if (video_enc && video_enc->codec_id == CODEC_ID_FLV1) {
-        put_byte(pb, 6); /* version (version 6 and above support FLV1 codec) */
-    } else {
-        put_byte(pb, 4); /* version (should use 4 for mpeg audio support) */
-    }
-    put_le32(pb, DUMMY_FILE_SIZE); /* dummy size
-                                      (will be patched if not streamed) */
-
-    put_swf_rect(pb, 0, width * 20, 0, height * 20);
-    put_le16(pb, (rate * 256) / rate_base); /* frame rate */
-    swf->duration_pos = url_ftell(pb);
-    put_le16(pb, (uint16_t)(DUMMY_DURATION * (int64_t)rate / rate_base)); /* frame count */
-
-    /* avm2/swf v9 (also v8?) files require a file attribute tag */
-    if (is_avm2) {
-        put_swf_tag(s, TAG_FILEATTRIBUTES);
-        put_le32(pb, 1<<3); /* set ActionScript v3/AVM2 flag */
-        put_swf_end_tag(s);
-    }
-
-    /* define a shape with the jpeg inside */
-    if (video_enc && (video_enc->codec_id == CODEC_ID_VP6F ||
-                       video_enc->codec_id == CODEC_ID_FLV1)) {
-    } else if (video_enc && video_enc->codec_id == CODEC_ID_MJPEG) {
-        put_swf_tag(s, TAG_DEFINESHAPE);
-
-        put_le16(pb, SHAPE_ID); /* ID of shape */
-        /* bounding rectangle */
-        put_swf_rect(pb, 0, width, 0, height);
-        /* style info */
-        put_byte(pb, 1); /* one fill style */
-        put_byte(pb, 0x41); /* clipped bitmap fill */
-        put_le16(pb, BITMAP_ID); /* bitmap ID */
-        /* position of the bitmap */
-        put_swf_matrix(pb, (int)(1.0 * (1 << FRAC_BITS)), 0,
-                       0, (int)(1.0 * (1 << FRAC_BITS)), 0, 0);
-        put_byte(pb, 0); /* no line style */
-
-        /* shape drawing */
-        init_put_bits(&p, buf1, sizeof(buf1));
-        put_bits(&p, 4, 1); /* one fill bit */
-        put_bits(&p, 4, 0); /* zero line bit */
-
-        put_bits(&p, 1, 0); /* not an edge */
-        put_bits(&p, 5, FLAG_MOVETO | FLAG_SETFILL0);
-        put_bits(&p, 5, 1); /* nbits */
-        put_bits(&p, 1, 0); /* X */
-        put_bits(&p, 1, 0); /* Y */
-        put_bits(&p, 1, 1); /* set fill style 1 */
-
-        /* draw the rectangle ! */
-        put_swf_line_edge(&p, width, 0);
-        put_swf_line_edge(&p, 0, height);
-        put_swf_line_edge(&p, -width, 0);
-        put_swf_line_edge(&p, 0, -height);
-
-        /* end of shape */
-        put_bits(&p, 1, 0); /* not an edge */
-        put_bits(&p, 5, 0);
-
-        flush_put_bits(&p);
-        put_buffer(pb, buf1, pbBufPtr(&p) - p.buf);
-
-        put_swf_end_tag(s);
-    }
-
-    if (audio_enc && audio_enc->codec_id == CODEC_ID_MP3) {
-        int v;
-
-        /* start sound */
-        put_swf_tag(s, TAG_STREAMHEAD2);
-
-        v = 0;
-        switch(audio_enc->sample_rate) {
-        case 11025:
-            v |= 1 << 2;
-            break;
-        case 22050:
-            v |= 2 << 2;
-            break;
-        case 44100:
-            v |= 3 << 2;
-            break;
-        default:
-            /* not supported */
-            av_log(s, AV_LOG_ERROR, "swf does not support that sample rate, choose from (44100, 22050, 11025).\n");
-            return -1;
-        }
-        v |= 0x02; /* 16 bit playback */
-        if (audio_enc->channels == 2)
-            v |= 0x01; /* stereo playback */
-        put_byte(s->pb, v);
-        v |= 0x20; /* mp3 compressed */
-        put_byte(s->pb, v);
-        put_le16(s->pb, swf->samples_per_frame);  /* avg samples per frame */
-        put_le16(s->pb, 0);
-
-        put_swf_end_tag(s);
-    }
-
-    put_flush_packet(s->pb);
-    return 0;
-}
-
-static int swf_write_video(AVFormatContext *s,
-                           AVCodecContext *enc, const uint8_t *buf, int size)
-{
-    SWFContext *swf = s->priv_data;
-    ByteIOContext *pb = s->pb;
-
-    /* Flash Player limit */
-    if (swf->swf_frame_number == 16000) {
-        av_log(enc, AV_LOG_INFO, "warning: Flash Player limit of 16000 frames reached\n");
-    }
-
-    if (swf->video_type == CODEC_ID_VP6F ||
-        swf->video_type == CODEC_ID_FLV1) {
-        if (swf->video_frame_number == 0) {
-            /* create a new video object */
-            put_swf_tag(s, TAG_VIDEOSTREAM);
-            put_le16(pb, VIDEO_ID);
-            put_le16(pb, 15000); /* hard flash player limit */
-            put_le16(pb, enc->width);
-            put_le16(pb, enc->height);
-            put_byte(pb, 0);
-            put_byte(pb,codec_get_tag(swf_codec_tags,swf->video_type));
-            put_swf_end_tag(s);
-
-            /* place the video object for the first time */
-            put_swf_tag(s, TAG_PLACEOBJECT2);
-            put_byte(pb, 0x36);
-            put_le16(pb, 1);
-            put_le16(pb, VIDEO_ID);
-            put_swf_matrix(pb, 1 << FRAC_BITS, 0, 0, 1 << FRAC_BITS, 0, 0);
-            put_le16(pb, swf->video_frame_number);
-            put_byte(pb, 'v');
-            put_byte(pb, 'i');
-            put_byte(pb, 'd');
-            put_byte(pb, 'e');
-            put_byte(pb, 'o');
-            put_byte(pb, 0x00);
-            put_swf_end_tag(s);
-        } else {
-            /* mark the character for update */
-            put_swf_tag(s, TAG_PLACEOBJECT2);
-            put_byte(pb, 0x11);
-            put_le16(pb, 1);
-            put_le16(pb, swf->video_frame_number);
-            put_swf_end_tag(s);
-        }
-
-        /* set video frame data */
-        put_swf_tag(s, TAG_VIDEOFRAME | TAG_LONG);
-        put_le16(pb, VIDEO_ID);
-        put_le16(pb, swf->video_frame_number++);
-        put_buffer(pb, buf, size);
-        put_swf_end_tag(s);
-    } else if (swf->video_type == CODEC_ID_MJPEG) {
-        if (swf->swf_frame_number > 0) {
-            /* remove the shape */
-            put_swf_tag(s, TAG_REMOVEOBJECT);
-            put_le16(pb, SHAPE_ID); /* shape ID */
-            put_le16(pb, 1); /* depth */
-            put_swf_end_tag(s);
-
-            /* free the bitmap */
-            put_swf_tag(s, TAG_FREECHARACTER);
-            put_le16(pb, BITMAP_ID);
-            put_swf_end_tag(s);
-        }
-
-        put_swf_tag(s, TAG_JPEG2 | TAG_LONG);
-
-        put_le16(pb, BITMAP_ID); /* ID of the image */
-
-        /* a dummy jpeg header seems to be required */
-        put_byte(pb, 0xff);
-        put_byte(pb, 0xd8);
-        put_byte(pb, 0xff);
-        put_byte(pb, 0xd9);
-        /* write the jpeg image */
-        put_buffer(pb, buf, size);
-
-        put_swf_end_tag(s);
-
-        /* draw the shape */
-
-        put_swf_tag(s, TAG_PLACEOBJECT);
-        put_le16(pb, SHAPE_ID); /* shape ID */
-        put_le16(pb, 1); /* depth */
-        put_swf_matrix(pb, 20 << FRAC_BITS, 0, 0, 20 << FRAC_BITS, 0, 0);
-        put_swf_end_tag(s);
-    } else {
-        /* invalid codec */
-    }
-
-    swf->swf_frame_number ++;
-
-    /* streaming sound always should be placed just before showframe tags */
-    if (swf->audio_type && swf->audio_in_pos) {
-        put_swf_tag(s, TAG_STREAMBLOCK | TAG_LONG);
-        put_le16(pb, swf->sound_samples);
-        put_le16(pb, 0); // seek samples
-        put_buffer(pb, swf->audio_fifo, swf->audio_in_pos);
-        put_swf_end_tag(s);
-
-        /* update FIFO */
-        swf->sound_samples = 0;
-        swf->audio_in_pos = 0;
-    }
-
-    /* output the frame */
-    put_swf_tag(s, TAG_SHOWFRAME);
-    put_swf_end_tag(s);
-
-    put_flush_packet(s->pb);
-
-    return 0;
-}
-
-static int swf_write_audio(AVFormatContext *s,
-                           AVCodecContext *enc, const uint8_t *buf, int size)
-{
-    SWFContext *swf = s->priv_data;
-
-    /* Flash Player limit */
-    if (swf->swf_frame_number == 16000) {
-        av_log(enc, AV_LOG_INFO, "warning: Flash Player limit of 16000 frames reached\n");
-    }
-
-    if (swf->audio_in_pos + size >= AUDIO_FIFO_SIZE) {
-        av_log(s, AV_LOG_ERROR, "audio fifo too small to mux audio essence\n");
-        return -1;
-    }
-
-    memcpy(swf->audio_fifo +  swf->audio_in_pos, buf, size);
-    swf->audio_in_pos += size;
-    swf->sound_samples += enc->frame_size;
-
-    /* if audio only stream make sure we add swf frames */
-    if (swf->video_type == 0) {
-        swf_write_video(s, enc, 0, 0);
-    }
-
-    return 0;
-}
-
-static int swf_write_packet(AVFormatContext *s, AVPacket *pkt)
-{
-    AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
-    if (codec->codec_type == CODEC_TYPE_AUDIO)
-        return swf_write_audio(s, codec, pkt->data, pkt->size);
-    else
-        return swf_write_video(s, codec, pkt->data, pkt->size);
-}
-
-static int swf_write_trailer(AVFormatContext *s)
-{
-    SWFContext *swf = s->priv_data;
-    ByteIOContext *pb = s->pb;
-    AVCodecContext *enc, *video_enc;
-    int file_size, i;
-
-    video_enc = NULL;
-    for(i=0;i<s->nb_streams;i++) {
-        enc = s->streams[i]->codec;
-        if (enc->codec_type == CODEC_TYPE_VIDEO)
-            video_enc = enc;
-    }
-
-    put_swf_tag(s, TAG_END);
-    put_swf_end_tag(s);
-
-    put_flush_packet(s->pb);
-
-    /* patch file size and number of frames if not streamed */
-    if (!url_is_streamed(s->pb) && video_enc) {
-        file_size = url_ftell(pb);
-        url_fseek(pb, 4, SEEK_SET);
-        put_le32(pb, file_size);
-        url_fseek(pb, swf->duration_pos, SEEK_SET);
-        put_le16(pb, video_enc->frame_number);
-        url_fseek(pb, file_size, SEEK_SET);
-    }
-    return 0;
-}
-#endif //CONFIG_MUXERS
-
-/*********************************************/
-/* Extract FLV encoded frame and MP3 from swf
-   Note that the detection of the real frame
-   is inaccurate at this point as it can be
-   quite tricky to determine, you almost certainly
-   will get a bad audio/video sync */
-
-static int get_swf_tag(ByteIOContext *pb, int *len_ptr)
-{
-    int tag, len;
-
-    if (url_feof(pb))
-        return -1;
-
-    tag = get_le16(pb);
-    len = tag & 0x3f;
-    tag = tag >> 6;
-    if (len == 0x3f) {
-        len = get_le32(pb);
-    }
-//    av_log(NULL, AV_LOG_DEBUG, "Tag: %d - Len: %d\n", tag, len);
-    *len_ptr = len;
-    return tag;
-}
-
-
-static int swf_probe(AVProbeData *p)
-{
-    /* check file header */
-    if ((p->buf[0] == 'F' || p->buf[0] == 'C') && p->buf[1] == 'W' &&
-        p->buf[2] == 'S')
-        return AVPROBE_SCORE_MAX;
-    else
-        return 0;
-}
-
-static int swf_read_header(AVFormatContext *s, AVFormatParameters *ap)
-{
-    SWFContext *swf = s->priv_data;
-    ByteIOContext *pb = s->pb;
-    int nbits, len, tag;
-
-    tag = get_be32(pb) & 0xffffff00;
-
-    if (tag == MKBETAG('C', 'W', 'S', 0)) {
-        av_log(s, AV_LOG_ERROR, "Compressed SWF format not supported\n");
-        return AVERROR(EIO);
-    }
-    if (tag != MKBETAG('F', 'W', 'S', 0))
-        return AVERROR(EIO);
-    get_le32(pb);
-    /* skip rectangle size */
-    nbits = get_byte(pb) >> 3;
-    len = (4 * nbits - 3 + 7) / 8;
-    url_fskip(pb, len);
-    swf->frame_rate = get_le16(pb); /* 8.8 fixed */
-    get_le16(pb); /* frame count */
-
-    swf->samples_per_frame = 0;
-    s->ctx_flags |= AVFMTCTX_NOHEADER;
-    return 0;
-}
-
-static int swf_read_packet(AVFormatContext *s, AVPacket *pkt)
-{
-    SWFContext *swf = s->priv_data;
-    ByteIOContext *pb = s->pb;
-    AVStream *vst = NULL, *ast = NULL, *st = 0;
-    int tag, len, i, frame, v;
-
-    for(;;) {
-        tag = get_swf_tag(pb, &len);
-        if (tag < 0)
-            return AVERROR(EIO);
-        if (tag == TAG_VIDEOSTREAM && !vst) {
-            int ch_id = get_le16(pb);
-            get_le16(pb);
-            get_le16(pb);
-            get_le16(pb);
-            get_byte(pb);
-            /* Check for FLV1 */
-            vst = av_new_stream(s, ch_id);
-            if (!vst)
-                return -1;
-            vst->codec->codec_type = CODEC_TYPE_VIDEO;
-            vst->codec->codec_id = codec_get_id(swf_codec_tags, get_byte(pb));
-            av_set_pts_info(vst, 64, 256, swf->frame_rate);
-            vst->codec->time_base = (AVRational){ 256, swf->frame_rate };
-            len -= 10;
-        } else if ((tag == TAG_STREAMHEAD || tag == TAG_STREAMHEAD2) && !ast) {
-            /* streaming found */
-            int sample_rate_code;
-            get_byte(pb);
-            v = get_byte(pb);
-            swf->samples_per_frame = get_le16(pb);
-            ast = av_new_stream(s, -1); /* -1 to avoid clash with video stream ch_id */
-            if (!ast)
-                return -1;
-            swf->audio_stream_index = ast->index;
-            ast->codec->channels = 1 + (v&1);
-            ast->codec->codec_type = CODEC_TYPE_AUDIO;
-            ast->codec->codec_id = codec_get_id(swf_audio_codec_tags, (v>>4) & 15);
-            ast->need_parsing = AVSTREAM_PARSE_FULL;
-            sample_rate_code= (v>>2) & 3;
-            if (!sample_rate_code)
-                return AVERROR(EIO);
-            ast->codec->sample_rate = 11025 << (sample_rate_code-1);
-            av_set_pts_info(ast, 64, 1, ast->codec->sample_rate);
-            len -= 4;
-        } else if (tag == TAG_VIDEOFRAME) {
-            int ch_id = get_le16(pb);
-            len -= 2;
-            for(i=0; i<s->nb_streams; i++) {
-                st = s->streams[i];
-                if (st->codec->codec_type == CODEC_TYPE_VIDEO && st->id == ch_id) {
-                    frame = get_le16(pb);
-                    av_get_packet(pb, pkt, len-2);
-                    pkt->pts = frame;
-                    pkt->stream_index = st->index;
-                    return pkt->size;
-                }
-            }
-        } else if (tag == TAG_STREAMBLOCK) {
-            st = s->streams[swf->audio_stream_index];
-            if (st->codec->codec_id == CODEC_ID_MP3) {
-                url_fskip(pb, 4);
-                av_get_packet(pb, pkt, len-4);
-            } else { // ADPCM, PCM
-                av_get_packet(pb, pkt, len);
-            }
-            pkt->stream_index = st->index;
-            return pkt->size;
-        } else if (tag == TAG_JPEG2) {
-            for (i=0; i<s->nb_streams; i++) {
-                st = s->streams[i];
-                if (st->id == -2)
-                    break;
-            }
-            if (i == s->nb_streams) {
-                vst = av_new_stream(s, -2); /* -2 to avoid clash with video stream and audio stream */
-                if (!vst)
-                    return -1;
-                vst->codec->codec_type = CODEC_TYPE_VIDEO;
-                vst->codec->codec_id = CODEC_ID_MJPEG;
-                av_set_pts_info(vst, 64, 256, swf->frame_rate);
-                vst->codec->time_base = (AVRational){ 256, swf->frame_rate };
-                st = vst;
-            }
-            get_le16(pb); /* BITMAP_ID */
-            av_new_packet(pkt, len-2);
-            get_buffer(pb, pkt->data, 4);
-            if (AV_RB32(pkt->data) == 0xffd8ffd9 ||
-                AV_RB32(pkt->data) == 0xffd9ffd8) {
-                /* old SWF files containing SOI/EOI as data start */
-                /* files created by swink have reversed tag */
-                pkt->size -= 4;
-                get_buffer(pb, pkt->data, pkt->size);
-            } else {
-                get_buffer(pb, pkt->data + 4, pkt->size - 4);
-            }
-            pkt->stream_index = st->index;
-            return pkt->size;
-        }
-        url_fskip(pb, len);
-    }
-    return 0;
-}
-
-static int swf_read_close(AVFormatContext *s)
-{
-    return 0;
-}
-
-#ifdef CONFIG_SWF_DEMUXER
-AVInputFormat swf_demuxer = {
-    "swf",
-    "Flash format",
-    sizeof(SWFContext),
-    swf_probe,
-    swf_read_header,
-    swf_read_packet,
-    swf_read_close,
-};
-#endif
-#ifdef CONFIG_SWF_MUXER
-AVOutputFormat swf_muxer = {
-    "swf",
-    "Flash format",
-    "application/x-shockwave-flash",
-    "swf",
-    sizeof(SWFContext),
-    CODEC_ID_MP3,
-    CODEC_ID_FLV1,
-    swf_write_header,
-    swf_write_packet,
-    swf_write_trailer,
-};
-#endif
-#ifdef CONFIG_AVM2_MUXER
-AVOutputFormat avm2_muxer = {
-    "avm2",
-    "Flash 9 (AVM2) format",
-    "application/x-shockwave-flash",
-    NULL,
-    sizeof(SWFContext),
-    CODEC_ID_MP3,
-    CODEC_ID_FLV1,
-    swf_write_header,
-    swf_write_packet,
-    swf_write_trailer,
-};
-#endif