- made --extra-cflags option work on darwin

- allow INTER4V macroblocks for FLV1 codec
- fixed issue in flv file format saving 8 mp3 frames per packet instead of 1
- fixed crasher in flv file format involving mp3 buffer handling
- added FLV1 codec support for swf file format (FlashPlayer6 or above
required) and made it default
- fixed broken mp3 support in swf file format
patch by (Tinic Uro <turo at macromedia dot com>)
cleanup by me

Originally committed as revision 2756 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 524 insertions, 126 deletions

diff --git a/libavformat/swf.c b/libavformat/swf.c
index e9999f41b3..bf740d3e91 100644
--- a/libavformat/swf.c
+++ b/libavformat/swf.c
@@ -1,6 +1,7 @@
 /*
  * Flash Compatible Streaming Format
  * Copyright (c) 2000 Fabrice Bellard.
+ * Copyright (c) 2003 Tinic Uro.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -28,9 +29,13 @@
 #define TAG_FREECHARACTER 3
 #define TAG_PLACEOBJECT   4
 #define TAG_REMOVEOBJECT  5
-#define TAG_STREAMHEAD    18
+#define TAG_STREAMHEAD    45
 #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_LONG         0x100
 
@@ -39,16 +44,117 @@
 #define FLAG_SETFILL0    0x02
 #define FLAG_SETFILL1    0x04
 
+#define SWF_VIDEO_CODEC_FLV1	0x02
+
+#define AUDIO_FIFO_SIZE 65536
+
 /* character id used */
 #define BITMAP_ID 0
+#define VIDEO_ID 0
 #define SHAPE_ID  1
 
+typedef struct SWFFrame_s {
+    void *data;
+    int size;
+    struct SWFFrame_s *prev;
+    struct SWFFrame_s *next;
+} SWFFrame;
+
 typedef struct {
+
     offset_t duration_pos;
     offset_t tag_pos;
+    
+    int samples_per_frame;
+    int sound_samples;
+    int video_samples;
+    int skip_samples;
+    int swf_frame_number;
+    int video_frame_number;
+    int ms_per_frame;
+    int ch_id;
     int tag;
+
+    uint8_t *audio_fifo;
+    int audio_in_pos;
+    int audio_out_pos;
+    int audio_size;
+
+    int video_type;
+    int audio_type;
+    
+    SWFFrame *frame_head;
+    SWFFrame *frame_tail;
 } SWFContext;
 
+static const int sSampleRates[3][4] = {
+    {44100, 48000, 32000, 0},
+    {22050, 24000, 16000, 0},
+    {11025, 12000,  8000, 0},
+};
+
+static const int sBitRates[2][3][15] = {
+    {   {  0, 32, 64, 96,128,160,192,224,256,288,320,352,384,416,448},
+        {  0, 32, 48, 56, 64, 80, 96,112,128,160,192,224,256,320,384},
+        {  0, 32, 40, 48, 56, 64, 80, 96,112,128,160,192,224,256,320}
+    },
+    {   {  0, 32, 48, 56, 64, 80, 96,112,128,144,160,176,192,224,256},
+        {  0,  8, 16, 24, 32, 40, 48, 56, 64, 80, 96,112,128,144,160},
+        {  0,  8, 16, 24, 32, 40, 48, 56, 64, 80, 96,112,128,144,160}
+    },
+};
+
+static const int sSamplesPerFrame[3][3] =
+{
+    {  384,     1152,    1152 },
+    {  384,     1152,     576 },
+    {  384,     1152,     576 }
+};
+
+static const int sBitsPerSlot[3] = {
+    32,
+    8,
+    8
+};
+
+static int swf_mp3_info(void *data, int *byteSize, int *samplesPerFrame, int *sampleRate, int *isMono )
+{
+    uint8_t *dataTmp = (uint8_t *)data;
+    uint32_t header = ( (uint32_t)dataTmp[0] << 24 ) | ( (uint32_t)dataTmp[1] << 16 ) | ( (uint32_t)dataTmp[2] << 8 ) | (uint32_t)dataTmp[3];
+    int layerID = 3 - ((header >> 17) & 0x03);
+    int bitRateID = ((header >> 12) & 0x0f);
+    int sampleRateID = ((header >> 10) & 0x03);
+    int bitRate = 0;
+    int bitsPerSlot = sBitsPerSlot[layerID];
+    int isPadded = ((header >> 9) & 0x01);
+    
+    if ( (( header >> 21 ) & 0x7ff) != 0x7ff ) {
+        return 0;
+    }
+
+    *isMono = ((header >>  6) & 0x03) == 0x03;
+
+    if ( (header >> 19 ) & 0x01 ) {
+        *sampleRate = sSampleRates[0][sampleRateID];
+        bitRate = sBitRates[0][layerID][bitRateID] * 1000;
+        *samplesPerFrame = sSamplesPerFrame[0][layerID];
+    } else {
+        if ( (header >> 20) & 0x01 ) {
+            *sampleRate = sSampleRates[1][sampleRateID];
+            bitRate = sBitRates[1][layerID][bitRateID] * 1000;
+            *samplesPerFrame = sSamplesPerFrame[1][layerID];
+        } else {
+            *sampleRate = sSampleRates[2][sampleRateID];
+            bitRate = sBitRates[1][layerID][bitRateID] * 1000;
+            *samplesPerFrame = sSamplesPerFrame[2][layerID];
+        }
+    }
+
+    *byteSize = ( ( ( ( *samplesPerFrame * (bitRate / bitsPerSlot) ) / *sampleRate ) + isPadded ) );
+
+    return 1;
+}
+
 #ifdef CONFIG_ENCODERS
 static void put_swf_tag(AVFormatContext *s, int tag)
 {
@@ -160,34 +266,44 @@ static void put_swf_line_edge(PutBitContext *pb, int dx, int dy)
 
 #define FRAC_BITS 16
 
-/* put matrix (not size optimized */
+/* 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 */
-    put_bits(&p, 5, 20); /* nb bits */
-    put_bits(&p, 20, a);
-    put_bits(&p, 20, d);
+    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 */
-    put_bits(&p, 5, 20); /* nb bits */
-    put_bits(&p, 20, c);
-    put_bits(&p, 20, b);
-
-    put_bits(&p, 5, 20); /* nb bits */
-    put_bits(&p, 20, tx);
-    put_bits(&p, 20, ty);
+    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);
 }
 
-/* XXX: handle audio only */
+/* */
 static int swf_write_header(AVFormatContext *s)
 {
     SWFContext *swf;
@@ -202,87 +318,122 @@ static int swf_write_header(AVFormatContext *s)
         return -1;
     s->priv_data = swf;
 
+    swf->ch_id = -1;
+    swf->audio_in_pos = 0;
+    swf->audio_out_pos = 0;
+    swf->audio_size = 0;
+    swf->audio_fifo = av_malloc(AUDIO_FIFO_SIZE);
+    swf->frame_head = 0;
+    swf->frame_tail = 0;
+    swf->sound_samples = 0;
+    swf->video_samples = 0;
+    swf->swf_frame_number = 0;
+    swf->video_frame_number = 0;
+    swf->skip_samples = 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)
             audio_enc = enc;
-        else
-            video_enc = enc;
+        else {
+            if ( enc->codec_id == CODEC_ID_FLV1 || enc->codec_id == CODEC_ID_MJPEG ) {
+                video_enc = enc;
+            } else {
+                fprintf(stderr, "SWF only supports FLV1 and MJPEG\n");
+                return -1;
+            }
+        }
     }
 
     if (!video_enc) {
         /* currenty, 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->frame_rate;
         rate_base = video_enc->frame_rate_base;
     }
 
+    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;
+    }
+
     put_tag(pb, "FWS");
-    put_byte(pb, 4); /* version (should use 4 for mpeg audio support) */
+    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, 0, height);
+    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 */
     
     /* define a shape with the jpeg inside */
-
-    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 */
+    if ( video_enc && 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 */
+        /* 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 */
     
-    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);
     
-    /* 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);
+        /* end of shape */
+        put_bits(&p, 1, 0); /* not an edge */
+        put_bits(&p, 5, 0);
 
-    put_swf_end_tag(s);
+        flush_put_bits(&p);
+        put_buffer(pb, buf1, pbBufPtr(&p) - p.buf);
 
+        put_swf_end_tag(s);
+    }
     
-    if (audio_enc) {
+    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) {
@@ -297,19 +448,18 @@ static int swf_write_header(AVFormatContext *s)
             break;
         default:
             /* not supported */
+            av_free(swf->audio_fifo);
             av_free(swf);
             return -1;
         }
+        v |= 0x02; /* 16 bit playback */
         if (audio_enc->channels == 2)
-            v |= 1;
+            v |= 0x01; /* stereo playback */
+        put_byte(&s->pb, v);
         v |= 0x20; /* mp3 compressed */
-        v |= 0x02; /* 16 bits */
-        
-        put_swf_tag(s, TAG_STREAMHEAD);
-        put_byte(&s->pb, 0);
         put_byte(&s->pb, v);
-        put_le16(&s->pb, (audio_enc->sample_rate * rate_base) / rate);  /* avg samples per frame */
-        
+        put_le16(&s->pb, swf->samples_per_frame);  /* avg samples per frame */
+        put_le16(&s->pb, 0);
         
         put_swf_end_tag(s);
     }
@@ -321,62 +471,232 @@ static int swf_write_header(AVFormatContext *s)
 static int swf_write_video(AVFormatContext *s, 
                            AVCodecContext *enc, const uint8_t *buf, int size)
 {
+    SWFContext *swf = s->priv_data;
     ByteIOContext *pb = &s->pb;
-    static int tag_id = 0;
-
-    if (enc->frame_number > 1) {
-        /* 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);
+    int c = 0;
+    int outSize = 0;
+    int outSamples = 0;
+    
+    /* Flash Player limit */
+    if ( swf->swf_frame_number >= 16000 ) {
+        return 0;
     }
 
-    put_swf_tag(s, TAG_JPEG2 | TAG_LONG);
+    /* Store video data in queue */
+    if ( enc->codec_type == CODEC_TYPE_VIDEO ) {
+        SWFFrame *new_frame = av_malloc(sizeof(SWFFrame));
+        new_frame->prev = 0;
+        new_frame->next = swf->frame_head;
+        new_frame->data = av_malloc(size);
+        new_frame->size = size;
+        memcpy(new_frame->data,buf,size);
+        swf->frame_head = new_frame;
+        if ( swf->frame_tail == 0 ) {
+            swf->frame_tail = new_frame;
+        }
+    }
+    
+    if ( swf->audio_type ) {
+        /* Prescan audio data for this swf frame */
+retry_swf_audio_packet:
+        if ( ( swf->audio_size-outSize ) >= 4 ) {
+            int mp3FrameSize = 0;
+            int mp3SampleRate = 0;
+            int mp3IsMono = 0;
+            int mp3SamplesPerFrame = 0;
+            
+            /* copy out mp3 header from ring buffer */
+            uint8_t header[4];
+            for (c=0; c<4; c++) {
+                header[c] = swf->audio_fifo[(swf->audio_in_pos+outSize+c) % AUDIO_FIFO_SIZE];
+            }
+            
+            if ( swf_mp3_info(header,&mp3FrameSize,&mp3SamplesPerFrame,&mp3SampleRate,&mp3IsMono) ) {
+                if ( ( swf->audio_size-outSize ) >= mp3FrameSize ) {
+                    outSize += mp3FrameSize;
+                    outSamples += mp3SamplesPerFrame;
+                    if ( ( swf->sound_samples + outSamples + swf->samples_per_frame ) < swf->video_samples ) {
+                        goto retry_swf_audio_packet;
+                    }
+                }
+            } else {
+                /* invalid mp3 data, skip forward
+                we need to do this since the Flash Player 
+                does not like custom headers */
+                swf->audio_in_pos ++;
+                swf->audio_size --;
+                swf->audio_in_pos %= AUDIO_FIFO_SIZE;
+                goto retry_swf_audio_packet;
+            }
+        }
+        
+        /* audio stream is behind video stream, bail */
+        if ( ( swf->sound_samples + outSamples + swf->samples_per_frame ) < swf->video_samples ) {
+            return 0;
+        }
 
-    put_le16(pb, tag_id); /* ID of the image */
+        /* compute audio/video drift */
+        if ( enc->codec_type == CODEC_TYPE_VIDEO ) {
+            swf->skip_samples = (int)( ( (double)(swf->swf_frame_number) * (double)enc->frame_rate_base * 44100. ) / (double)(enc->frame_rate) );
+            swf->skip_samples -=  swf->video_samples;
+        }
+    }
 
-    /* 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);
+    /* check if we need to insert a padding frame */
+    if (swf->skip_samples <= ( swf->samples_per_frame / 2 ) ) {
+        /* no, it is time for a real frame, check if one is available */
+        if ( swf->frame_tail ) {
+            if ( 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, SWF_VIDEO_CODEC_FLV1);
+                    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);
+                }
+    
+                // write out pending frames
+                for (; ( enc->frame_number - swf->video_frame_number ) > 0;) {
+                    /* 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, swf->frame_tail->data, swf->frame_tail->size);
+                    put_swf_end_tag(s);
+                }
 
-    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, swf->frame_tail->data, swf->frame_tail->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 */
+            }
+    
+            av_free(swf->frame_tail->data);
+            swf->frame_tail = swf->frame_tail->prev;
+            if ( swf->frame_tail ) {
+                if ( swf->frame_tail->next ) {
+                    av_free(swf->frame_tail->next);
+                }
+                swf->frame_tail->next = 0;
+            } else {
+                swf->frame_head = 0;
+            }
+            swf->swf_frame_number ++;
+        }
+    }
 
-    /* draw the shape */
+    swf->video_samples += swf->samples_per_frame;
 
-    put_swf_tag(s, TAG_PLACEOBJECT);
-    put_le16(pb, SHAPE_ID); /* shape ID */
-    put_le16(pb, 1); /* depth */
-    put_swf_matrix(pb, 1 << FRAC_BITS, 0, 0, 1 << FRAC_BITS, 0, 0);
-    put_swf_end_tag(s);
+    /* streaming sound always should be placed just before showframe tags */
+    if ( outSize > 0 ) {
+        put_swf_tag(s, TAG_STREAMBLOCK | TAG_LONG);
+        put_le16(pb, outSamples);
+        put_le16(pb, 0);
+        for (c=0; c<outSize; c++) {
+            put_byte(pb,swf->audio_fifo[(swf->audio_in_pos+c) % AUDIO_FIFO_SIZE]);
+        }
+        put_swf_end_tag(s);
     
+        /* update FIFO */
+        swf->sound_samples += outSamples;
+        swf->audio_in_pos += outSize;
+        swf->audio_size -= outSize;
+        swf->audio_in_pos %= AUDIO_FIFO_SIZE;
+    }
+
     /* 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, const uint8_t *buf, int size)
+static int swf_write_audio(AVFormatContext *s, 
+                           AVCodecContext *enc, const uint8_t *buf, int size)
 {
-    ByteIOContext *pb = &s->pb;
+    SWFContext *swf = s->priv_data;
+    int c = 0;
 
-    put_swf_tag(s, TAG_STREAMBLOCK | TAG_LONG);
+    /* Flash Player limit */
+    if ( swf->swf_frame_number >= 16000 ) {
+        return 0;
+    }
+
+    if (enc->codec_id == CODEC_ID_MP3 ) {
+        for (c=0; c<size; c++) {
+            swf->audio_fifo[(swf->audio_out_pos+c)%AUDIO_FIFO_SIZE] = buf[c];
+        }
+        swf->audio_size += size;
+        swf->audio_out_pos += size;
+        swf->audio_out_pos %= AUDIO_FIFO_SIZE;
+    }
+
+    /* if audio only stream make sure we add swf frames */
+    if ( swf->video_type == 0 ) {
+        swf_write_video(s, enc, 0, 0);
+    }
 
-    put_buffer(pb, buf, size);
-    
-    put_swf_end_tag(s);
-    put_flush_packet(&s->pb);
     return 0;
 }
 
@@ -385,7 +705,7 @@ static int swf_write_packet(AVFormatContext *s, int stream_index,
 {
     AVCodecContext *codec = &s->streams[stream_index]->codec;
     if (codec->codec_type == CODEC_TYPE_AUDIO)
-        return swf_write_audio(s, buf, size);
+        return swf_write_audio(s, codec, buf, size);
     else
         return swf_write_video(s, codec, buf, size);
 }
@@ -417,12 +737,19 @@ static int swf_write_trailer(AVFormatContext *s)
         url_fseek(pb, swf->duration_pos, SEEK_SET);
         put_le16(pb, video_enc->frame_number);
     }
+    
+    av_free(swf->audio_fifo);
+
     return 0;
 }
 #endif //CONFIG_ENCODERS
 
-/***********************************/
-/* just to extract MP3 from swf */
+/*********************************************/
+/* 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)
 {
@@ -456,9 +783,17 @@ static int swf_probe(AVProbeData *p)
 
 static int swf_read_header(AVFormatContext *s, AVFormatParameters *ap)
 {
+    SWFContext *swf = 0;
     ByteIOContext *pb = &s->pb;
     int nbits, len, frame_rate, tag, v;
-    AVStream *st;
+    offset_t firstTagOff;
+    AVStream *ast = 0;
+    AVStream *vst = 0;
+
+    swf = av_malloc(sizeof(SWFContext));
+    if (!swf)
+        return -1;
+    s->priv_data = swf;
 
     if ((get_be32(pb) & 0xffffff00) != MKBETAG('F', 'W', 'S', 0))
         return -EIO;
@@ -469,70 +804,133 @@ static int swf_read_header(AVFormatContext *s, AVFormatParameters *ap)
     url_fskip(pb, len);
     frame_rate = get_le16(pb);
     get_le16(pb); /* frame count */
-
+    
+    av_set_pts_info(s, 24, 1, 1000); /* 24 bit pts in ms */
+    
+    /* The Flash Player converts 8.8 frame rates 
+       to milliseconds internally. Do the same to get 
+       a correct framerate */
+    swf->ms_per_frame = ( 1000 * 256 ) / frame_rate;
+    swf->samples_per_frame = 0;
+    swf->ch_id = -1;
+
+    firstTagOff = url_ftell(pb);
     for(;;) {
         tag = get_swf_tag(pb, &len);
         if (tag < 0) {
-            fprintf(stderr, "No streaming found in SWF\n");
+            if ( ast || vst ) {
+                if ( vst && ast ) {
+                    vst->codec.frame_rate = ast->codec.sample_rate / swf->samples_per_frame;
+                    vst->codec.frame_rate_base = 1;
+                }
+                break;
+            }
+            fprintf(stderr, "No media found in SWF\n");
             return -EIO;
         }
-        if (tag == TAG_STREAMHEAD) {
+        if ( tag == TAG_VIDEOSTREAM && !vst) {
+            swf->ch_id = get_le16(pb);
+            get_le16(pb);
+            get_le16(pb);
+            get_le16(pb);
+            get_byte(pb);
+            /* Check for FLV1 */
+            if ( get_byte(pb) == SWF_VIDEO_CODEC_FLV1 ) {
+                vst = av_new_stream(s, 0);
+                vst->codec.codec_type = CODEC_TYPE_VIDEO;
+                vst->codec.codec_id = CODEC_ID_FLV1;
+                if ( swf->samples_per_frame ) {
+                    vst->codec.frame_rate = 1000. / swf->ms_per_frame;
+                    vst->codec.frame_rate_base = 1;
+                }
+            }
+        } else if ( ( tag == TAG_STREAMHEAD || tag == TAG_STREAMHEAD2 ) && !ast) {
             /* streaming found */
             get_byte(pb);
             v = get_byte(pb);
-            get_le16(pb);
+            swf->samples_per_frame = get_le16(pb);
             if (len!=4)
                 url_fskip(pb,len-4);
             /* if mp3 streaming found, OK */
             if ((v & 0x20) != 0) {
-                st = av_new_stream(s, 0);
-                if (!st)
+                if ( tag == TAG_STREAMHEAD2 ) {
+                    get_le16(pb);
+                }
+                ast = av_new_stream(s, 1);
+                if (!ast)
                     return -ENOMEM;
 
                 if (v & 0x01)
-                    st->codec.channels = 2;
+                    ast->codec.channels = 2;
                 else
-                    st->codec.channels = 1;
+                    ast->codec.channels = 1;
 
                 switch((v>> 2) & 0x03) {
                 case 1:
-                    st->codec.sample_rate = 11025;
+                    ast->codec.sample_rate = 11025;
                     break;
                 case 2:
-                    st->codec.sample_rate = 22050;
+                    ast->codec.sample_rate = 22050;
                     break;
                 case 3:
-                    st->codec.sample_rate = 44100;
+                    ast->codec.sample_rate = 44100;
                     break;
                 default:
-                    av_free(st);
+                    av_free(ast);
                     return -EIO;
                 }
-                st->codec.codec_type = CODEC_TYPE_AUDIO;
-                st->codec.codec_id = CODEC_ID_MP2;
-                break;
+                ast->codec.codec_type = CODEC_TYPE_AUDIO;
+                ast->codec.codec_id = CODEC_ID_MP3;
             }
         } else {
             url_fskip(pb, len);
         }
     }
-
+    url_fseek(pb, firstTagOff, SEEK_SET);
+    
     return 0;
 }
 
 static int swf_read_packet(AVFormatContext *s, AVPacket *pkt)
 {
+    SWFContext *swf = s->priv_data;
     ByteIOContext *pb = &s->pb;
-    int tag, len;
+    AVStream *st = 0;
+    int tag, len, i, frame;
     
     for(;;) {
         tag = get_swf_tag(pb, &len);
         if (tag < 0) 
             return -EIO;
-        if (tag == TAG_STREAMBLOCK) {
-            av_new_packet(pkt, len);
-            get_buffer(pb, pkt->data, pkt->size);
-            break;
+        if (tag == TAG_VIDEOFRAME) {
+            for( i=0; i<s->nb_streams; i++ ) {
+        	st = s->streams[i];
+                if (st->id == 0) {
+                    if ( get_le16(pb) == swf->ch_id ) {
+                        frame = get_le16(pb);
+                        av_new_packet(pkt, len-4);
+                        pkt->pts = frame * swf->ms_per_frame;
+                        pkt->stream_index = st->index;
+                        get_buffer(pb, pkt->data, pkt->size);
+                        return pkt->size;
+                    } else {
+                        url_fskip(pb, len-2);
+                        continue;
+                    }
+                }
+            }    
+            url_fskip(pb, len);
+        } else if (tag == TAG_STREAMBLOCK) {
+            for( i=0; i<s->nb_streams; i++ ) {
+        	st = s->streams[i];
+                if (st->id == 1) {
+                    av_new_packet(pkt, len);
+                    pkt->stream_index = st->index;
+                    get_buffer(pb, pkt->data, pkt->size);
+                    return pkt->size;
+                }
+            }
+            url_fskip(pb, len);
         } else {
             url_fskip(pb, len);
         }
@@ -548,7 +946,7 @@ static int swf_read_close(AVFormatContext *s)
 static AVInputFormat swf_iformat = {
     "swf",
     "Flash format",
-    0,
+    sizeof(SWFContext),
     swf_probe,
     swf_read_header,
     swf_read_packet,
@@ -562,8 +960,8 @@ static AVOutputFormat swf_oformat = {
     "application/x-shockwave-flash",
     "swf",
     sizeof(SWFContext),
-    CODEC_ID_MP2,
-    CODEC_ID_MJPEG,
+    CODEC_ID_MP3,
+    CODEC_ID_FLV1,
     swf_write_header,
     swf_write_packet,
     swf_write_trailer,