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- made --extra-cflags option work on darwin

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- 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
pull/126/head
Tinic Uro 21 years ago committed by Michael Niedermayer
parent 8cb5d4c060
commit 747a0554ea
4 changed files with 538 additions and 133 deletions
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  1. 8
      configure
  2. 2
      libavcodec/mpegvideo.c
  3. 11
      libavformat/flvenc.c
  4. 650
      libavformat/swf.c

8
configure vendored
Unescape View File

@ -431,21 +431,21 @@ fi
needmdynamicnopic="no"
if test $targetos = Darwin; then
if test -n "`$cc -v 2>&1 | grep xlc`"; then
CFLAGS="-qpdf2 -qlanglvl=extc99 -qmaxmem=-1 -qarch=auto -qtune=auto"
CFLAGS="$CFLAGS -qpdf2 -qlanglvl=extc99 -qmaxmem=-1 -qarch=auto -qtune=auto"
else
gcc_version="`$cc -v 2>&1 | grep version | cut -d ' ' -f3-`"
case "$gcc_version" in
*2.95*)
CFLAGS="-no-cpp-precomp -pipe -fomit-frame-pointer"
CFLAGS="$CFLAGS -no-cpp-precomp -pipe -fomit-frame-pointer"
;;
*3.*)
CFLAGS="-no-cpp-precomp -pipe -fomit-frame-pointer -force_cpusubtype_ALL -Wno-sign-compare"
CFLAGS="$CFLAGS -no-cpp-precomp -pipe -fomit-frame-pointer -force_cpusubtype_ALL -Wno-sign-compare"
if test "$lshared" = no; then
needmdynamicnopic="yes"
fi
;;
*)
CFLAGS="-no-cpp-precomp -pipe -fomit-frame-pointer"
CFLAGS="$CFLAGS -no-cpp-precomp -pipe -fomit-frame-pointer"
if test "$lshared" = no; then
needmdynamicnopic="yes"
fi

2
libavcodec/mpegvideo.c
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@ -748,7 +748,7 @@ int MPV_encode_init(AVCodecContext *avctx)
}
if((s->flags & CODEC_FLAG_4MV) && s->codec_id != CODEC_ID_MPEG4
&& s->codec_id != CODEC_ID_H263 && s->codec_id != CODEC_ID_H263P){
&& s->codec_id != CODEC_ID_H263 && s->codec_id != CODEC_ID_H263P && s->codec_id != CODEC_ID_FLV1){
av_log(avctx, AV_LOG_ERROR, "4MV not supported by codec\n");
return -1;
}

11
libavformat/flvenc.c
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@ -121,7 +121,7 @@ static int mp3info(void *data, int *byteSize, int *samplesPerFrame, int *sampleR
}
}
*byteSize = ( ( ( ( *samplesPerFrame * (bitRate / bitsPerSlot) ) / *sampleRate ) + isPadded ) * bitsPerSlot);
*byteSize = ( ( ( ( *samplesPerFrame * (bitRate / bitsPerSlot) ) / *sampleRate ) + isPadded ) );
return 1;
}
@ -295,8 +295,15 @@ static int flv_write_packet(AVFormatContext *s, int stream_index,
int mp3SampleRate = 0;
int mp3IsMono = 0;
int mp3SamplesPerFrame = 0;
int c=0;
/* copy out mp3 header from ring buffer */
uint8_t header[4];
for (c=0; c<4; c++) {
header[c] = flv->audio_fifo[(flv->audioInPos+c) % AUDIO_FIFO_SIZE];
}
if ( mp3info(&flv->audioFifo[flv->audioInPos],&mp3FrameSize,&mp3SamplesPerFrame,&mp3SampleRate,&mp3IsMono) ) {
if ( mp3info(header,&mp3FrameSize,&mp3SamplesPerFrame,&mp3SampleRate,&mp3IsMono) ) {
if ( flv->audioSize >= mp3FrameSize ) {
int soundFormat = 0x22;

650
libavformat/swf.c
Unescape View File

@ -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,

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