static int rm_write_header(AVFormatContext *s)
{
RMMuxContext *rm = s->priv_data;
StreamInfo *stream;
int n;
AVCodecParameters *par;
if (s->nb_streams > 2) {
av_log(s, AV_LOG_ERROR, "At most 2 streams are currently supported for muxing in RM\n");
return AVERROR_PATCHWELCOME;
}
for(n=0;n<s->nb_streams;n++) {
AVStream *st = s->streams[n];
int frame_size;
s->streams[n]->id = n;
par = s->streams[n]->codecpar;
stream = &rm->streams[n];
memset(stream, 0, sizeof(StreamInfo));
stream->num = n;
stream->bit_rate = par->bit_rate;
stream->par = par;
switch (par->codec_type) {
case AVMEDIA_TYPE_AUDIO:
rm->audio_stream = stream;
frame_size = av_get_audio_frame_duration2(par, 0);
stream->frame_rate = (AVRational){par->sample_rate, frame_size};
/* XXX: dummy values */
stream->packet_max_size = 1024;
stream->nb_packets = 0;
stream->total_frames = stream->nb_packets;
break;
case AVMEDIA_TYPE_VIDEO:
rm->video_stream = stream;
// TODO: should be avg_frame_rate
stream->frame_rate = av_inv_q(st->time_base);
/* XXX: dummy values */
stream->packet_max_size = 4096;
stream->nb_packets = 0;
stream->total_frames = stream->nb_packets;
break;
default:
return -1;
}
}
if (rv10_write_header(s, 0, 0))
return AVERROR_INVALIDDATA;
avio_flush(s->pb);
return 0;
}
static int rm_write_header(AVFormatContext *s)
{
RMMuxContext *rm = s->priv_data;
StreamInfo *stream;
int n;
AVCodecParameters *par;
for(n=0;n<s->nb_streams;n++) {
AVStream *st = s->streams[n];
int frame_size;
s->streams[n]->id = n;
par = s->streams[n]->codecpar;
stream = &rm->streams[n];
memset(stream, 0, sizeof(StreamInfo));
stream->num = n;
stream->bit_rate = par->bit_rate;
stream->par = par;
switch (par->codec_type) {
case AVMEDIA_TYPE_AUDIO:
rm->audio_stream = stream;
frame_size = av_get_audio_frame_duration2(par, 0);
stream->frame_rate = (float)par->sample_rate / (float)frame_size;
/* XXX: dummy values */
stream->packet_max_size = 1024;
stream->nb_packets = 0;
stream->total_frames = stream->nb_packets;
break;
case AVMEDIA_TYPE_VIDEO:
rm->video_stream = stream;
// TODO: should be avg_frame_rate
stream->frame_rate = (float)st->time_base.den / (float)st->time_base.num;
/* XXX: dummy values */
stream->packet_max_size = 4096;
stream->nb_packets = 0;
stream->total_frames = stream->nb_packets;
break;
default:
return -1;
}
}
if (rv10_write_header(s, 0, 0))
return AVERROR_INVALIDDATA;
avio_flush(s->pb);
return 0;
}
static int adp_read_header(AVFormatContext *s)
{
AVStream *st;
st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
st->codecpar->codec_id = AV_CODEC_ID_ADPCM_DTK;
st->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;
st->codecpar->channels = 2;
st->codecpar->sample_rate = 48000;
st->start_time = 0;
if (s->pb->seekable & AVIO_SEEKABLE_NORMAL)
st->duration = av_get_audio_frame_duration2(st->codecpar, avio_size(s->pb));
avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
return 0;
}
static int swf_write_audio(AVFormatContext *s,
AVCodecParameters *par, uint8_t *buf, int size)
{
SWFContext *swf = s->priv_data;
/* Flash Player limit */
if (swf->swf_frame_number == 16000)
av_log(s, AV_LOG_INFO, "warning: Flash Player limit of 16000 frames reached\n");
if (av_fifo_size(swf->audio_fifo) + size > AUDIO_FIFO_SIZE) {
av_log(s, AV_LOG_ERROR, "audio fifo too small to mux audio essence\n");
return -1;
}
av_fifo_generic_write(swf->audio_fifo, buf, size, NULL);
swf->sound_samples += av_get_audio_frame_duration2(par, size);
/* if audio only stream make sure we add swf frames */
if (!swf->video_par)
swf_write_video(s, par, 0, 0);
return 0;
}
static int rv10_write_header(AVFormatContext *ctx,
int data_size, int index_pos)
{
RMMuxContext *rm = ctx->priv_data;
AVIOContext *s = ctx->pb;
StreamInfo *stream;
unsigned char *data_offset_ptr, *start_ptr;
const char *desc, *mimetype;
int nb_packets, packet_total_size, packet_max_size, size, packet_avg_size, i;
int bit_rate, v, duration, flags, data_pos;
AVDictionaryEntry *tag;
start_ptr = s->buf_ptr;
ffio_wfourcc(s, ".RMF");
avio_wb32(s,18); /* header size */
avio_wb16(s,0);
avio_wb32(s,0);
avio_wb32(s,4 + ctx->nb_streams); /* num headers */
ffio_wfourcc(s,"PROP");
avio_wb32(s, 50);
avio_wb16(s, 0);
packet_max_size = 0;
packet_total_size = 0;
nb_packets = 0;
bit_rate = 0;
duration = 0;
for(i=0;i<ctx->nb_streams;i++) {
StreamInfo *stream = &rm->streams[i];
bit_rate += stream->bit_rate;
if (stream->packet_max_size > packet_max_size)
packet_max_size = stream->packet_max_size;
nb_packets += stream->nb_packets;
packet_total_size += stream->packet_total_size;
/* select maximum duration */
v = (int) (1000.0 * (float)stream->total_frames / stream->frame_rate);
if (v > duration)
duration = v;
}
avio_wb32(s, bit_rate); /* max bit rate */
avio_wb32(s, bit_rate); /* avg bit rate */
avio_wb32(s, packet_max_size); /* max packet size */
if (nb_packets > 0)
packet_avg_size = packet_total_size / nb_packets;
else
packet_avg_size = 0;
avio_wb32(s, packet_avg_size); /* avg packet size */
avio_wb32(s, nb_packets); /* num packets */
avio_wb32(s, duration); /* duration */
avio_wb32(s, BUFFER_DURATION); /* preroll */
avio_wb32(s, index_pos); /* index offset */
/* computation of data the data offset */
data_offset_ptr = s->buf_ptr;
avio_wb32(s, 0); /* data offset : will be patched after */
avio_wb16(s, ctx->nb_streams); /* num streams */
flags = 1 | 2; /* save allowed & perfect play */
if (!s->seekable)
flags |= 4; /* live broadcast */
avio_wb16(s, flags);
/* comments */
ffio_wfourcc(s,"CONT");
size = 4 * 2 + 10;
for(i=0; i<FF_ARRAY_ELEMS(ff_rm_metadata); i++) {
tag = av_dict_get(ctx->metadata, ff_rm_metadata[i], NULL, 0);
if(tag) size += strlen(tag->value);
}
avio_wb32(s,size);
avio_wb16(s,0);
for(i=0; i<FF_ARRAY_ELEMS(ff_rm_metadata); i++) {
tag = av_dict_get(ctx->metadata, ff_rm_metadata[i], NULL, 0);
put_str(s, tag ? tag->value : "");
}
for(i=0;i<ctx->nb_streams;i++) {
int codec_data_size;
stream = &rm->streams[i];
if (stream->par->codec_type == AVMEDIA_TYPE_AUDIO) {
desc = "The Audio Stream";
mimetype = "audio/x-pn-realaudio";
codec_data_size = 73;
} else {
desc = "The Video Stream";
mimetype = "video/x-pn-realvideo";
codec_data_size = 34;
}
ffio_wfourcc(s,"MDPR");
size = 10 + 9 * 4 + strlen(desc) + strlen(mimetype) + codec_data_size;
avio_wb32(s, size);
avio_wb16(s, 0);
avio_wb16(s, i); /* stream number */
avio_wb32(s, stream->bit_rate); /* max bit rate */
avio_wb32(s, stream->bit_rate); /* avg bit rate */
avio_wb32(s, stream->packet_max_size); /* max packet size */
if (stream->nb_packets > 0)
packet_avg_size = stream->packet_total_size /
stream->nb_packets;
else
packet_avg_size = 0;
avio_wb32(s, packet_avg_size); /* avg packet size */
avio_wb32(s, 0); /* start time */
avio_wb32(s, BUFFER_DURATION); /* preroll */
/* duration */
if (!s->seekable || !stream->total_frames)
avio_wb32(s, (int)(3600 * 1000));
else
avio_wb32(s, (int)(stream->total_frames * 1000 / stream->frame_rate));
put_str8(s, desc);
put_str8(s, mimetype);
avio_wb32(s, codec_data_size);
if (stream->par->codec_type == AVMEDIA_TYPE_AUDIO) {
int coded_frame_size, fscode, sample_rate;
int frame_size = av_get_audio_frame_duration2(stream->par, 0);
sample_rate = stream->par->sample_rate;
coded_frame_size = (stream->par->bit_rate *
frame_size) / (8 * sample_rate);
/* audio codec info */
avio_write(s, ".ra", 3);
avio_w8(s, 0xfd);
avio_wb32(s, 0x00040000); /* version */
ffio_wfourcc(s, ".ra4");
avio_wb32(s, 0x01b53530); /* stream length */
avio_wb16(s, 4); /* unknown */
avio_wb32(s, 0x39); /* header size */
switch(sample_rate) {
case 48000:
case 24000:
case 12000:
fscode = 1;
break;
default:
case 44100:
case 22050:
case 11025:
fscode = 2;
break;
case 32000:
case 16000:
case 8000:
fscode = 3;
}
avio_wb16(s, fscode); /* codec additional info, for AC-3, seems
to be a frequency code */
/* special hack to compensate rounding errors... */
if (coded_frame_size == 557)
coded_frame_size--;
avio_wb32(s, coded_frame_size); /* frame length */
avio_wb32(s, 0x51540); /* unknown */
avio_wb32(s, 0x249f0); /* unknown */
avio_wb32(s, 0x249f0); /* unknown */
avio_wb16(s, 0x01);
/* frame length : seems to be very important */
avio_wb16(s, coded_frame_size);
avio_wb32(s, 0); /* unknown */
avio_wb16(s, stream->par->sample_rate); /* sample rate */
avio_wb32(s, 0x10); /* unknown */
avio_wb16(s, stream->par->channels);
put_str8(s, "Int0"); /* codec name */
if (stream->par->codec_tag) {
avio_w8(s, 4); /* tag length */
avio_wl32(s, stream->par->codec_tag);
} else {
av_log(ctx, AV_LOG_ERROR, "Invalid codec tag\n");
return -1;
}
avio_wb16(s, 0); /* title length */
avio_wb16(s, 0); /* author length */
avio_wb16(s, 0); /* copyright length */
avio_w8(s, 0); /* end of header */
} else {
/* video codec info */
avio_wb32(s,34); /* size */
ffio_wfourcc(s, "VIDO");
if(stream->par->codec_id == AV_CODEC_ID_RV10)
ffio_wfourcc(s,"RV10");
else
ffio_wfourcc(s,"RV20");
avio_wb16(s, stream->par->width);
avio_wb16(s, stream->par->height);
avio_wb16(s, (int) stream->frame_rate); /* frames per seconds ? */
avio_wb32(s,0); /* unknown meaning */
avio_wb16(s, (int) stream->frame_rate); /* unknown meaning */
avio_wb32(s,0); /* unknown meaning */
avio_wb16(s, 8); /* unknown meaning */
/* Seems to be the codec version: only use basic H.263. The next
versions seems to add a differential DC coding as in
MPEG... nothing new under the sun. */
if(stream->par->codec_id == AV_CODEC_ID_RV10)
avio_wb32(s,0x10000000);
else
avio_wb32(s,0x20103001);
//avio_wb32(s,0x10003000);
}
}
/* patch data offset field */
data_pos = s->buf_ptr - start_ptr;
rm->data_pos = data_pos;
data_offset_ptr[0] = data_pos >> 24;
data_offset_ptr[1] = data_pos >> 16;
data_offset_ptr[2] = data_pos >> 8;
data_offset_ptr[3] = data_pos;
/* data stream */
ffio_wfourcc(s, "DATA");
avio_wb32(s,data_size + 10 + 8);
avio_wb16(s,0);
avio_wb32(s, nb_packets); /* number of packets */
avio_wb32(s,0); /* next data header */
return 0;
}
int
ff_voc_get_packet(AVFormatContext *s, AVPacket *pkt, AVStream *st, int max_size)
{
VocDecContext *voc = s->priv_data;
AVCodecParameters *par = st->codecpar;
AVIOContext *pb = s->pb;
VocType type;
int size, tmp_codec=-1;
int sample_rate = 0;
int channels = 1;
int64_t duration;
int ret;
av_add_index_entry(st,
avio_tell(pb),
voc->pts,
voc->remaining_size,
0,
AVINDEX_KEYFRAME);
while (!voc->remaining_size) {
type = avio_r8(pb);
if (type == VOC_TYPE_EOF)
return AVERROR_EOF;
voc->remaining_size = avio_rl24(pb);
if (!voc->remaining_size) {
if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL))
return AVERROR(EIO);
voc->remaining_size = avio_size(pb) - avio_tell(pb);
}
max_size -= 4;
switch (type) {
case VOC_TYPE_VOICE_DATA:
if (!par->sample_rate) {
par->sample_rate = 1000000 / (256 - avio_r8(pb));
if (sample_rate)
par->sample_rate = sample_rate;
avpriv_set_pts_info(st, 64, 1, par->sample_rate);
par->channels = channels;
par->bits_per_coded_sample = av_get_bits_per_sample(par->codec_id);
} else
avio_skip(pb, 1);
tmp_codec = avio_r8(pb);
voc->remaining_size -= 2;
max_size -= 2;
channels = 1;
break;
case VOC_TYPE_VOICE_DATA_CONT:
break;
case VOC_TYPE_EXTENDED:
sample_rate = avio_rl16(pb);
avio_r8(pb);
channels = avio_r8(pb) + 1;
sample_rate = 256000000 / (channels * (65536 - sample_rate));
voc->remaining_size = 0;
max_size -= 4;
break;
case VOC_TYPE_NEW_VOICE_DATA:
if (!par->sample_rate) {
par->sample_rate = avio_rl32(pb);
avpriv_set_pts_info(st, 64, 1, par->sample_rate);
par->bits_per_coded_sample = avio_r8(pb);
par->channels = avio_r8(pb);
} else
avio_skip(pb, 6);
tmp_codec = avio_rl16(pb);
avio_skip(pb, 4);
voc->remaining_size -= 12;
max_size -= 12;
break;
default:
avio_skip(pb, voc->remaining_size);
max_size -= voc->remaining_size;
voc->remaining_size = 0;
break;
}
}
if (par->sample_rate <= 0) {
av_log(s, AV_LOG_ERROR, "Invalid sample rate %d\n", par->sample_rate);
return AVERROR_INVALIDDATA;
}
if (tmp_codec >= 0) {
tmp_codec = ff_codec_get_id(ff_voc_codec_tags, tmp_codec);
if (par->codec_id == AV_CODEC_ID_NONE)
par->codec_id = tmp_codec;
else if (par->codec_id != tmp_codec)
av_log(s, AV_LOG_WARNING, "Ignoring mid-stream change in audio codec\n");
if (par->codec_id == AV_CODEC_ID_NONE) {
if (s->audio_codec_id == AV_CODEC_ID_NONE) {
av_log(s, AV_LOG_ERROR, "unknown codec tag\n");
return AVERROR(EINVAL);
}
av_log(s, AV_LOG_WARNING, "unknown codec tag\n");
}
}
par->bit_rate = (int64_t)par->sample_rate * par->channels * par->bits_per_coded_sample;
if (max_size <= 0)
max_size = 2048;
size = FFMIN(voc->remaining_size, max_size);
voc->remaining_size -= size;
ret = av_get_packet(pb, pkt, size);
pkt->dts = pkt->pts = voc->pts;
duration = av_get_audio_frame_duration2(st->codecpar, size);
if (duration > 0 && voc->pts != AV_NOPTS_VALUE)
voc->pts += duration;
else
voc->pts = AV_NOPTS_VALUE;
return ret;
}
