/**
* Resizes a FIFO.
*/
void av_fifo_realloc(AVFifoBuffer *f, unsigned int new_size) {
unsigned int old_size= f->end - f->buffer;
if(old_size < new_size){
int len= av_fifo_size(f);
AVFifoBuffer f2;
av_fifo_init(&f2, new_size);
av_fifo_read(f, f2.buffer, len);
f2.wptr += len;
av_free(f->buffer);
*f= f2;
}
}
int av_fifo_realloc2(AVFifoBuffer *f, unsigned int new_size) {
unsigned int old_size= f->end - f->buffer;
if(old_size <= new_size){
int len= av_fifo_size(f);
AVFifoBuffer f2;
if (av_fifo_init(&f2, new_size) < 0)
return -1;
av_fifo_read(f, f2.buffer, len);
f2.wptr += len;
av_free(f->buffer);
*f= f2;
}
return 0;
}
static int swf_write_header(AVFormatContext *s)
{
SWFContext *swf = s->priv_data;
ByteIOContext *pb = s->pb;
PutBitContext p;
uint8_t buf1[256];
int i, width, height, rate, rate_base;
int version;
swf->sound_samples = 0;
swf->swf_frame_number = 0;
swf->video_frame_number = 0;
for(i=0;i<s->nb_streams;i++) {
AVCodecContext *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;
}
swf->audio_enc = enc;
av_fifo_init(&swf->audio_fifo, AUDIO_FIFO_SIZE);
} 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) {
swf->video_enc = enc;
} else {
av_log(s, AV_LOG_ERROR, "SWF muxer only supports VP6, FLV1 and MJPEG\n");
return -1;
}
}
}
if (!swf->video_enc) {
/* currently, cannot work correctly if audio only */
width = 320;
height = 200;
rate = 10;
rate_base= 1;
} else {
width = swf->video_enc->width;
height = swf->video_enc->height;
rate = swf->video_enc->time_base.den;
rate_base = swf->video_enc->time_base.num;
}
if (!swf->audio_enc)
swf->samples_per_frame = (44100. * rate_base) / rate;
else
swf->samples_per_frame = (swf->audio_enc->sample_rate * rate_base) / rate;
put_tag(pb, "FWS");
if (!strcmp("avm2", s->oformat->name))
version = 9;
else if (swf->video_enc && swf->video_enc->codec_id == CODEC_ID_VP6F)
version = 8; /* version 8 and above support VP6 codec */
else if (swf->video_enc && swf->video_enc->codec_id == CODEC_ID_FLV1)
version = 6; /* version 6 and above support FLV1 codec */
else
version = 4; /* version 4 for mpeg audio support */
put_byte(pb, version);
put_le32(pb, DUMMY_FILE_SIZE); /* dummy size
(will be patched if not streamed) */
put_swf_rect(pb, 0, width * 20, 0, height * 20);
put_le16(pb, (rate * 256) / rate_base); /* frame rate */
swf->duration_pos = url_ftell(pb);
put_le16(pb, (uint16_t)(DUMMY_DURATION * (int64_t)rate / rate_base)); /* frame count */
/* avm2/swf v9 (also v8?) files require a file attribute tag */
if (version == 9) {
put_swf_tag(s, TAG_FILEATTRIBUTES);
put_le32(pb, 1<<3); /* set ActionScript v3/AVM2 flag */
put_swf_end_tag(s);
}
/* define a shape with the jpeg inside */
if (swf->video_enc && swf->video_enc->codec_id == CODEC_ID_MJPEG) {
put_swf_tag(s, TAG_DEFINESHAPE);
put_le16(pb, SHAPE_ID); /* ID of shape */
/* bounding rectangle */
put_swf_rect(pb, 0, width, 0, height);
/* style info */
put_byte(pb, 1); /* one fill style */
put_byte(pb, 0x41); /* clipped bitmap fill */
put_le16(pb, BITMAP_ID); /* bitmap ID */
/* position of the bitmap */
put_swf_matrix(pb, (int)(1.0 * (1 << FRAC_BITS)), 0,
0, (int)(1.0 * (1 << FRAC_BITS)), 0, 0);
put_byte(pb, 0); /* no line style */
/* shape drawing */
init_put_bits(&p, buf1, sizeof(buf1));
put_bits(&p, 4, 1); /* one fill bit */
put_bits(&p, 4, 0); /* zero line bit */
put_bits(&p, 1, 0); /* not an edge */
put_bits(&p, 5, FLAG_MOVETO | FLAG_SETFILL0);
put_bits(&p, 5, 1); /* nbits */
put_bits(&p, 1, 0); /* X */
put_bits(&p, 1, 0); /* Y */
put_bits(&p, 1, 1); /* set fill style 1 */
/* draw the rectangle ! */
put_swf_line_edge(&p, width, 0);
put_swf_line_edge(&p, 0, height);
put_swf_line_edge(&p, -width, 0);
put_swf_line_edge(&p, 0, -height);
/* end of shape */
put_bits(&p, 1, 0); /* not an edge */
put_bits(&p, 5, 0);
flush_put_bits(&p);
put_buffer(pb, buf1, pbBufPtr(&p) - p.buf);
put_swf_end_tag(s);
}
if (swf->audio_enc && swf->audio_enc->codec_id == CODEC_ID_MP3) {
int v = 0;
/* start sound */
put_swf_tag(s, TAG_STREAMHEAD2);
switch(swf->audio_enc->sample_rate) {
case 11025: v |= 1 << 2; break;
case 22050: v |= 2 << 2; break;
case 44100: v |= 3 << 2; break;
default:
/* not supported */
av_log(s, AV_LOG_ERROR, "swf does not support that sample rate, choose from (44100, 22050, 11025).\n");
return -1;
}
v |= 0x02; /* 16 bit playback */
if (swf->audio_enc->channels == 2)
v |= 0x01; /* stereo playback */
put_byte(s->pb, v);
v |= 0x20; /* mp3 compressed */
put_byte(s->pb, v);
put_le16(s->pb, swf->samples_per_frame); /* avg samples per frame */
put_le16(s->pb, 0);
put_swf_end_tag(s);
}
put_flush_packet(s->pb);
return 0;
}
DVMuxContext* dv_init_mux(AVFormatContext* s)
{
DVMuxContext *c = (DVMuxContext *)s->priv_data;
AVStream *vst = NULL;
int i;
/* we support at most 1 video and 2 audio streams */
if (s->nb_streams > 3)
return NULL;
c->n_ast = 0;
c->ast[0] = c->ast[1] = NULL;
/* We have to sort out where audio and where video stream is */
for (i=0; i<s->nb_streams; i++) {
switch (s->streams[i]->codec->codec_type) {
case CODEC_TYPE_VIDEO:
vst = s->streams[i];
break;
case CODEC_TYPE_AUDIO:
c->ast[c->n_ast++] = s->streams[i];
break;
default:
goto bail_out;
}
}
/* Some checks -- DV format is very picky about its incoming streams */
if (!vst || vst->codec->codec_id != CODEC_ID_DVVIDEO)
goto bail_out;
for (i=0; i<c->n_ast; i++) {
if (c->ast[i] && (c->ast[i]->codec->codec_id != CODEC_ID_PCM_S16LE ||
c->ast[i]->codec->sample_rate != 48000 ||
c->ast[i]->codec->channels != 2))
goto bail_out;
}
c->sys = dv_codec_profile(vst->codec);
if (!c->sys)
goto bail_out;
if((c->n_ast > 1) && (c->sys->n_difchan < 2)) {
/* only 1 stereo pair is allowed in 25Mbps mode */
goto bail_out;
}
/* Ok, everything seems to be in working order */
c->frames = 0;
c->has_audio = 0;
c->has_video = 0;
c->start_time = (time_t)s->timestamp;
for (i=0; i<c->n_ast; i++) {
if (c->ast[i] && av_fifo_init(&c->audio_data[i], 100*AVCODEC_MAX_AUDIO_FRAME_SIZE) < 0) {
while (i>0) {
i--;
av_fifo_free(&c->audio_data[i]);
}
goto bail_out;
}
}
return c;
bail_out:
return NULL;
}
static int gxf_write_header(AVFormatContext *s)
{
ByteIOContext *pb = s->pb;
GXFContext *gxf = s->priv_data;
int i;
gxf->fc = s;
gxf->flags |= 0x00080000; /* material is simple clip */
for (i = 0; i < s->nb_streams; ++i) {
AVStream *st = s->streams[i];
GXFStreamContext *sc = &gxf->streams[i];
sc->codec = st->codec;
sc->index = i;
sc->media_type = codec_get_tag(gxf_media_types, sc->codec->codec_id);
if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
if (st->codec->codec_id != CODEC_ID_PCM_S16LE) {
av_log(s, AV_LOG_ERROR, "only 16 BIT PCM LE allowed for now\n");
return -1;
}
if (st->codec->sample_rate != 48000) {
av_log(s, AV_LOG_ERROR, "only 48000hz sampling rate is allowed\n");
return -1;
}
if (st->codec->channels != 1) {
av_log(s, AV_LOG_ERROR, "only mono tracks are allowed\n");
return -1;
}
sc->track_type = 2;
sc->sample_rate = st->codec->sample_rate;
av_set_pts_info(st, 64, 1, sc->sample_rate);
sc->sample_size = 16;
sc->frame_rate_index = -2;
sc->lines_index = -2;
sc->fields = -2;
gxf->audio_tracks++;
gxf->flags |= 0x04000000; /* audio is 16 bit pcm */
av_fifo_init(&sc->audio_buffer, 3*GXF_AUDIO_PACKET_SIZE);
} else if (sc->codec->codec_type == CODEC_TYPE_VIDEO) {
/* FIXME check from time_base ? */
if (sc->codec->height == 480 || sc->codec->height == 512) { /* NTSC or NTSC+VBI */
sc->frame_rate_index = 5;
sc->sample_rate = 60;
gxf->flags |= 0x00000080;
} else { /* assume PAL */
sc->frame_rate_index = 6;
sc->media_type++;
sc->sample_rate = 50;
gxf->flags |= 0x00000040;
}
gxf->sample_rate = sc->sample_rate;
av_set_pts_info(st, 64, 1, st->codec->time_base.den);
sc->dts_delay = GXF_NODELAY;
if (gxf_find_lines_index(sc) < 0)
sc->lines_index = -1;
sc->sample_size = st->codec->bit_rate;
sc->fields = 2; /* interlaced */
switch (sc->codec->codec_id) {
case CODEC_ID_MPEG2VIDEO:
sc->first_gop_closed = -1;
sc->track_type = 4;
gxf->mpeg_tracks++;
gxf->flags |= 0x00008000;
break;
case CODEC_ID_DVVIDEO:
if (sc->codec->pix_fmt == PIX_FMT_YUV422P) {
sc->media_type += 2;
sc->track_type = 6;
gxf->flags |= 0x00002000;
} else {
sc->track_type = 5;
gxf->flags |= 0x00001000;
}
break;
default:
av_log(s, AV_LOG_ERROR, "video codec not supported\n");
return -1;
}
}
}
gxf_write_map_packet(pb, gxf);
//gxf_write_flt_packet(pb, gxf);
gxf_write_umf_packet(pb, gxf);
put_flush_packet(pb);
return 0;
}
