/*
* 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
+ * 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 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avformat.h"
+#include "bitstream.h"
+#include "riff.h" /* for CodecTag */
/* should have a generic way to indicate probable size */
#define DUMMY_FILE_SIZE (100 * 1024 * 1024)
#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_LONG 0x100
#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;
*nbits_ptr = n;
}
-static void put_swf_rect(ByteIOContext *pb,
+static void put_swf_rect(ByteIOContext *pb,
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);
max_nbits(&nbits, xmax);
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);
}
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);
+ 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);
+ 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);
+ put_bits(pb, 1, 1);
+ put_bits(pb, nbits, dx & mask);
+ put_bits(pb, nbits, dy & mask);
}
}
#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));
- init_put_bits(&p, buf, sizeof(buf), NULL, NULL);
-
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);
-
- 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);
+ 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, 5, 20); /* nb bits */
- put_bits(&p, 20, tx);
- put_bits(&p, 20, ty);
+ 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);
}
-/* XXX: handle audio only */
+/* */
static int swf_write_header(AVFormatContext *s)
{
- SWFContext *swf;
+ SWFContext *swf = s->priv_data;
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->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)
- audio_enc = enc;
- else
- video_enc = enc;
+ 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) {
- /* currenty, cannot work correctly if audio only */
+ /* currently, 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 = 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;
}
put_tag(pb, "FWS");
- 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) */
+ 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, 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 */
-
- /* 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 */
-
- 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);
+ put_le16(pb, (uint16_t)(DUMMY_DURATION * (int64_t)rate / rate_base)); /* frame count */
- flush_put_bits(&p);
- put_buffer(pb, buf1, pbBufPtr(&p) - p.buf);
+ /* 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);
+ 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);
+ 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 |= 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);
}
return 0;
}
-static int swf_write_video(AVFormatContext *s,
- AVCodecContext *enc, UINT8 *buf, int size)
+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 */
+ /* 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);
-
- /* free the bitmap */
- put_swf_tag(s, TAG_FREECHARACTER);
- put_le16(pb, BITMAP_ID);
+ } 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);
- }
- put_swf_tag(s, TAG_JPEG2 | TAG_LONG);
+ /* draw the shape */
- put_le16(pb, tag_id); /* ID of the image */
+ 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 */
+ }
- /* 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);
+ swf->swf_frame_number ++;
- put_swf_end_tag(s);
+ /* 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);
- /* draw the shape */
+ /* update FIFO */
+ swf->sound_samples = 0;
+ swf->audio_in_pos = 0;
+ }
- 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);
-
/* 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;
- 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 (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);
+ }
- 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)
video_enc = NULL;
for(i=0;i<s->nb_streams;i++) {
- enc = &s->streams[i]->codec;
+ 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 */
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
-/***********************************/
-/* 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)
{
int tag, len;
-
+
if (url_feof(pb))
return -1;
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_size <= 16)
- return 0;
- if (p->buf[0] == 'F' && p->buf[1] == 'W' &&
+ if ((p->buf[0] == 'F' || p->buf[0] == 'C') && p->buf[1] == 'W' &&
p->buf[2] == 'S')
return AVPROBE_SCORE_MAX;
else
static int swf_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
+ SWFContext *swf = s->priv_data;
ByteIOContext *pb = &s->pb;
- int nbits, len, frame_rate, tag, v;
- AVStream *st;
+ int nbits, len, tag, v;
+ offset_t frame_offset = -1;
+ AVStream *ast = 0;
+ AVStream *vst = 0;
+
+ tag = get_be32(pb) & 0xffffff00;
- if ((get_be32(pb) & 0xffffff00) != MKBETAG('F', 'W', 'S', 0))
- return -EIO;
+ 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);
- frame_rate = get_le16(pb);
+ swf->frame_rate = get_le16(pb); /* 8.8 fixed */
get_le16(pb); /* frame count */
- for(;;) {
- tag = get_swf_tag(pb, &len);
- if (tag < 0) {
- fprintf(stderr, "No streaming found in SWF\n");
- return -EIO;
- }
- if (tag == TAG_STREAMHEAD) {
- /* streaming found */
- get_byte(pb);
- v = get_byte(pb);
- get_le16(pb);
- /* if mp3 streaming found, OK */
- if ((v & 0x20) != 0) {
- st = av_mallocz(sizeof(AVStream));
- if (!st)
- return -ENOMEM;
- if (v & 0x01)
- st->codec.channels = 2;
- else
- st->codec.channels = 1;
- s->nb_streams = 1;
- s->streams[0] = st;
-
- switch((v>> 2) & 0x03) {
- case 1:
- st->codec.sample_rate = 11025;
- break;
- case 2:
- st->codec.sample_rate = 22050;
- break;
- case 3:
- st->codec.sample_rate = 44100;
- break;
- default:
- av_free(st);
- return -EIO;
- }
- st->codec.codec_type = CODEC_TYPE_AUDIO;
- st->codec.codec_id = CODEC_ID_MP2;
- break;
- }
- } else {
- url_fskip(pb, len);
- }
- }
-
+ 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;
- int tag, len;
-
+ AVStream *vst = NULL, *ast = NULL, *st = 0;
+ int tag, len, i, frame, v;
+
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;
- } else {
- url_fskip(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);
+ 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 */
+ 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 */
+ 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) {
+ /* old SWF files containing SOI/EOI as data start */
+ 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;
+ return 0;
}
-static AVInputFormat swf_iformat = {
+#ifdef CONFIG_SWF_DEMUXER
+AVInputFormat swf_demuxer = {
"swf",
"Flash format",
- 0,
+ sizeof(SWFContext),
swf_probe,
swf_read_header,
swf_read_packet,
swf_read_close,
};
-
-static AVOutputFormat swf_oformat = {
+#endif
+#ifdef CONFIG_SWF_MUXER
+AVOutputFormat swf_muxer = {
"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,
};
-
-int swf_init(void)
-{
- av_register_input_format(&swf_iformat);
- av_register_output_format(&swf_oformat);
- return 0;
-}
+#endif
projects / ffmpeg / blobdiff