/*
* 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
#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
#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
+#undef NDEBUG
+#include <assert.h>
+
typedef struct {
+
offset_t duration_pos;
offset_t tag_pos;
+
+ int samples_per_frame;
+ int sound_samples;
+ int video_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;
} 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)
{
SWFContext *swf = s->priv_data;
int xmin, int xmax, int ymin, int ymax)
{
PutBitContext p;
- UINT8 buf[256];
+ uint8_t buf[256];
int nbits, mask;
- init_put_bits(&p, buf, sizeof(buf), NULL, NULL);
+ init_put_bits(&p, buf, sizeof(buf));
nbits = 0;
max_nbits(&nbits, xmin);
#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 buf[256];
+ uint8_t buf[256];
+ int nbits;
- init_put_bits(&p, buf, sizeof(buf), NULL, NULL);
+ 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;
ByteIOContext *pb = &s->pb;
AVCodecContext *enc, *audio_enc, *video_enc;
PutBitContext p;
- UINT8 buf1[256];
- int i, width, height, rate;
+ uint8_t buf1[256];
+ int i, width, height, rate, rate_base;
swf = av_malloc(sizeof(SWFContext));
if (!swf)
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->sound_samples = 0;
+ swf->video_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)
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 {
+ av_log(enc, AV_LOG_ERROR, "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 * FRAME_RATE_BASE;
+ 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_le16(pb, (rate * 256) / FRAME_RATE_BASE); /* frame rate */
+ 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)(DUMMY_DURATION * (INT64)rate / FRAME_RATE_BASE)); /* frame count */
+ 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 */
-
- /* shape drawing */
- init_put_bits(&p, buf1, sizeof(buf1), NULL, NULL);
- put_bits(&p, 4, 1); /* one fill bit */
- put_bits(&p, 4, 0); /* zero line bit */
+ 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 */
- 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 */
+ /* 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);
+ /* 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) {
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 * FRAME_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);
}
}
static int swf_write_video(AVFormatContext *s,
- AVCodecContext *enc, UINT8 *buf, int size)
+ AVCodecContext *enc, const uint8_t *buf, int size)
{
+ SWFContext *swf = s->priv_data;
ByteIOContext *pb = &s->pb;
- static int tag_id = 0;
+ int c = 0;
+ int outSize = 0;
+ int outSamples = 0;
+
+ /* 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 (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);
+ 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;
+ }
+ }
- /* free the bitmap */
- put_swf_tag(s, TAG_FREECHARACTER);
- put_le16(pb, BITMAP_ID);
- put_swf_end_tag(s);
+ /* audio stream is behind video stream, bail */
+ if ( ( swf->sound_samples + outSamples + swf->samples_per_frame ) < swf->video_samples ) {
+ return 0;
+ }
}
- put_swf_tag(s, TAG_JPEG2 | TAG_LONG);
-
- put_le16(pb, tag_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);
+ 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);
+ }
+
+ /* 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 ++;
- /* 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, UINT8 *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 ) {
+ av_log(enc, AV_LOG_INFO, "warning: Flash Player limit of 16000 frames reached\n");
+ }
+
+ 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;
}
-static int swf_write_packet(AVFormatContext *s, int stream_index,
- UINT8 *buf, int size, int force_pts)
+static int swf_write_packet(AVFormatContext *s, AVPacket *pkt)
{
- AVCodecContext *codec = &s->streams[stream_index]->codec;
+ AVCodecContext *codec = &s->streams[pkt->stream_index]->codec;
if (codec->codec_type == CODEC_TYPE_AUDIO)
- return swf_write_audio(s, buf, size);
+ return swf_write_audio(s, codec, pkt->data, pkt->size);
else
- return swf_write_video(s, codec, buf, size);
+ return swf_write_video(s, codec, pkt->data, pkt->size);
}
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)
{
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;
+ return AVERROR_IO;
get_le32(pb);
/* skip rectangle size */
nbits = get_byte(pb) >> 3;
url_fskip(pb, len);
frame_rate = get_le16(pb);
get_le16(pb); /* frame count */
-
+
+ /* 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");
- return -EIO;
+ 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;
+ }
+ av_log(s, AV_LOG_ERROR, "No media found in SWF\n");
+ return AVERROR_IO;
}
- 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);
+ av_set_pts_info(vst, 24, 1, 1000); /* 24 bit pts in ms */
+
+ 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_mallocz(sizeof(AVStream));
- if (!st)
+ if ( tag == TAG_STREAMHEAD2 ) {
+ get_le16(pb);
+ }
+ ast = av_new_stream(s, 1);
+ av_set_pts_info(ast, 24, 1, 1000); /* 24 bit pts in ms */
+ if (!ast)
return -ENOMEM;
+
if (v & 0x01)
- st->codec.channels = 2;
+ ast->codec.channels = 2;
else
- st->codec.channels = 1;
- s->nb_streams = 1;
- s->streams[0] = st;
+ 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);
- return -EIO;
+ av_free(ast);
+ return AVERROR_IO;
}
- 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;
+ return AVERROR_IO;
+ 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);
}
static AVInputFormat swf_iformat = {
"swf",
"Flash format",
- 0,
+ sizeof(SWFContext),
swf_probe,
swf_read_header,
swf_read_packet,
swf_read_close,
};
+#ifdef CONFIG_ENCODERS
static AVOutputFormat swf_oformat = {
"swf",
"Flash format",
"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,
};
+#endif //CONFIG_ENCODERS
int swf_init(void)
{
av_register_input_format(&swf_iformat);
+#ifdef CONFIG_ENCODERS
av_register_output_format(&swf_oformat);
+#endif //CONFIG_ENCODERS
return 0;
}
projects / ffmpeg / blobdiff