void ff_rtp_send_aac(AVFormatContext *s1, const uint8_t *buff, int size)
{
RTPMuxContext *s = s1->priv_data;
AVStream *st = s1->streams[0];
const int max_au_headers_size = 2 + 2 * s->max_frames_per_packet;
int len, max_packet_size = s->max_payload_size - max_au_headers_size;
uint8_t *p;
/* skip ADTS header, if present */
if ((s1->streams[0]->codecpar->extradata_size) == 0) {
size -= 7;
buff += 7;
}
/* test if the packet must be sent */
len = (s->buf_ptr - s->buf);
if (s->num_frames &&
(s->num_frames == s->max_frames_per_packet ||
(len + size) > s->max_payload_size ||
av_compare_ts(s->cur_timestamp - s->timestamp, st->time_base,
s1->max_delay, AV_TIME_BASE_Q) >= 0)) {
int au_size = s->num_frames * 2;
p = s->buf + max_au_headers_size - au_size - 2;
if (p != s->buf) {
memmove(p + 2, s->buf + 2, au_size);
}
/* Write the AU header size */
AV_WB16(p, au_size * 8);
ff_rtp_send_data(s1, p, s->buf_ptr - p, 1);
s->num_frames = 0;
}
if (s->num_frames == 0) {
s->buf_ptr = s->buf + max_au_headers_size;
s->timestamp = s->cur_timestamp;
}
if (size <= max_packet_size) {
p = s->buf + s->num_frames++ * 2 + 2;
AV_WB16(p, size * 8);
memcpy(s->buf_ptr, buff, size);
s->buf_ptr += size;
} else {
int au_size = size;
max_packet_size = s->max_payload_size - 4;
p = s->buf;
AV_WB16(p, 2 * 8);
while (size > 0) {
len = FFMIN(size, max_packet_size);
AV_WB16(&p[2], au_size * 8);
memcpy(p + 4, buff, len);
ff_rtp_send_data(s1, p, len + 4, len == size);
size -= len;
buff += len;
}
}
}
static void nal_send(AVFormatContext *s1, const uint8_t *buf, int size, int last)
{
RTPMuxContext *s = s1->priv_data;
av_log(s1, AV_LOG_DEBUG, "Sending NAL %x of len %d M=%d\n", buf[0] & 0x1F, size, last);
if (size <= s->max_payload_size) {
ff_rtp_send_data(s1, buf, size, last);
} else {
uint8_t type = buf[0] & 0x1F;
uint8_t nri = buf[0] & 0x60;
av_log(s1, AV_LOG_DEBUG, "NAL size %d > %d\n", size, s->max_payload_size);
s->buf[0] = 28; /* FU Indicator; Type = 28 ---> FU-A */
s->buf[0] |= nri;
s->buf[1] = type;
s->buf[1] |= 1 << 7;
buf += 1;
size -= 1;
while (size + 2 > s->max_payload_size) {
memcpy(&s->buf[2], buf, s->max_payload_size - 2);
ff_rtp_send_data(s1, s->buf, s->max_payload_size, 0);
buf += s->max_payload_size - 2;
size -= s->max_payload_size - 2;
s->buf[1] &= ~(1 << 7);
}
s->buf[1] |= 1 << 6;
memcpy(&s->buf[2], buf, size);
ff_rtp_send_data(s1, s->buf, size + 2, last);
}
}
static void send_mode_b(AVFormatContext *s1, const struct H263Info *info,
const struct H263State *state, const uint8_t *buf,
int len, int sbits, int ebits, int m)
{
RTPMuxContext *s = s1->priv_data;
PutBitContext pb;
init_put_bits(&pb, s->buf, 64);
put_bits(&pb, 1, 1); /* F - 1, mode B */
put_bits(&pb, 1, 0); /* P - 0, mode B */
put_bits(&pb, 3, sbits); /* SBIT - 0 bits */
put_bits(&pb, 3, ebits); /* EBIT - 0 bits */
put_bits(&pb, 3, info->src); /* SRC - source format */
put_bits(&pb, 5, state->quant); /* QUANT - quantizer for the first MB */
put_bits(&pb, 5, state->gobn); /* GOBN - GOB number */
put_bits(&pb, 9, state->mba); /* MBA - MB address */
put_bits(&pb, 2, 0); /* R - reserved */
put_bits(&pb, 1, info->i); /* I - inter/intra */
put_bits(&pb, 1, info->u); /* U - unrestricted motion vector */
put_bits(&pb, 1, info->s); /* S - syntax-baesd arithmetic coding */
put_bits(&pb, 1, info->a); /* A - advanced prediction */
put_bits(&pb, 7, state->hmv1); /* HVM1 - horizontal motion vector 1 */
put_bits(&pb, 7, state->vmv1); /* VMV1 - vertical motion vector 1 */
put_bits(&pb, 7, state->hmv2); /* HVM2 - horizontal motion vector 2 */
put_bits(&pb, 7, state->vmv2); /* VMV2 - vertical motion vector 2 */
flush_put_bits(&pb);
memcpy(s->buf + 8, buf, len);
ff_rtp_send_data(s1, s->buf, len + 8, m);
}
static void send_mode_a(AVFormatContext *s1, const struct H263Info *info,
const uint8_t *buf, int len, int ebits, int m)
{
RTPMuxContext *s = s1->priv_data;
PutBitContext pb;
init_put_bits(&pb, s->buf, 32);
put_bits(&pb, 1, 0); /* F - 0, mode A */
put_bits(&pb, 1, 0); /* P - 0, normal I/P */
put_bits(&pb, 3, 0); /* SBIT - 0 bits */
put_bits(&pb, 3, ebits); /* EBIT */
put_bits(&pb, 3, info->src); /* SRC - source format */
put_bits(&pb, 1, info->i); /* I - inter/intra */
put_bits(&pb, 1, info->u); /* U - unrestricted motion vector */
put_bits(&pb, 1, info->s); /* S - syntax-baesd arithmetic coding */
put_bits(&pb, 1, info->a); /* A - advanced prediction */
put_bits(&pb, 4, 0); /* R - reserved */
put_bits(&pb, 2, 0); /* DBQ - 0 */
put_bits(&pb, 3, 0); /* TRB - 0 */
put_bits(&pb, 8, info->tr); /* TR */
flush_put_bits(&pb);
memcpy(s->buf + 4, buf, len);
ff_rtp_send_data(s1, s->buf, len + 4, m);
}
/* send an integer number of samples and compute time stamp and fill
the rtp send buffer before sending. */
static void rtp_send_samples(AVFormatContext *s1,
const uint8_t *buf1, int size, int sample_size)
{
RTPMuxContext *s = s1->priv_data;
int len, max_packet_size, n;
max_packet_size = (s->max_payload_size / sample_size) * sample_size;
/* not needed, but who nows */
if ((size % sample_size) != 0)
av_abort();
n = 0;
while (size > 0) {
s->buf_ptr = s->buf;
len = FFMIN(max_packet_size, size);
/* copy data */
memcpy(s->buf_ptr, buf1, len);
s->buf_ptr += len;
buf1 += len;
size -= len;
s->timestamp = s->cur_timestamp + n / sample_size;
ff_rtp_send_data(s1, s->buf, s->buf_ptr - s->buf, 0);
n += (s->buf_ptr - s->buf);
}
}
/* send an integer number of samples and compute time stamp and fill
the rtp send buffer before sending. */
static int rtp_send_samples(AVFormatContext *s1,
const uint8_t *buf1, int size, int sample_size_bits)
{
RTPMuxContext *s = s1->priv_data;
int len, max_packet_size, n;
/* Calculate the number of bytes to get samples aligned on a byte border */
int aligned_samples_size = sample_size_bits/av_gcd(sample_size_bits, 8);
max_packet_size = (s->max_payload_size / aligned_samples_size) * aligned_samples_size;
/* Not needed, but who knows. Don't check if samples aren't an even number of bytes. */
if ((sample_size_bits % 8) == 0 && ((8 * size) % sample_size_bits) != 0)
return AVERROR(EINVAL);
n = 0;
while (size > 0) {
s->buf_ptr = s->buf;
len = FFMIN(max_packet_size, size);
/* copy data */
memcpy(s->buf_ptr, buf1, len);
s->buf_ptr += len;
buf1 += len;
size -= len;
s->timestamp = s->cur_timestamp + n * 8 / sample_size_bits;
ff_rtp_send_data(s1, s->buf, s->buf_ptr - s->buf, 0);
n += (s->buf_ptr - s->buf);
}
return 0;
}
void ff_rtp_send_aac(AVFormatContext *s1, const uint8_t *buff, int size)
{
RTPMuxContext *s = s1->priv_data;
int len, max_packet_size;
uint8_t *p;
const int max_frames_per_packet = s->max_frames_per_packet ? s->max_frames_per_packet : 5;
const int max_au_headers_size = 2 + 2 * max_frames_per_packet;
/* skip ADTS header, if present */
if ((s1->streams[0]->codec->extradata_size) == 0)
{
size -= 7;
buff += 7;
}
max_packet_size = s->max_payload_size - max_au_headers_size;
/* test if the packet must be sent */
len = (s->buf_ptr - s->buf);
if ((s->num_frames == max_frames_per_packet) || (len && (len + size) > s->max_payload_size))
{
int au_size = s->num_frames * 2;
p = s->buf + max_au_headers_size - au_size - 2;
if (p != s->buf)
{
memmove(p + 2, s->buf + 2, au_size);
}
/* Write the AU header size */
p[0] = ((au_size * 8) & 0xFF) >> 8;
p[1] = (au_size * 8) & 0xFF;
ff_rtp_send_data(s1, p, s->buf_ptr - p, 1);
s->num_frames = 0;
}
static void rtp_send_mpegaudio(AVFormatContext *s1,
const uint8_t *buf1, int size)
{
RTPMuxContext *s = s1->priv_data;
int len, count, max_packet_size;
max_packet_size = s->max_payload_size;
/* test if we must flush because not enough space */
len = (s->buf_ptr - s->buf);
if ((len + size) > max_packet_size)
{
if (len > 4)
{
ff_rtp_send_data(s1, s->buf, s->buf_ptr - s->buf, 0);
s->buf_ptr = s->buf + 4;
}
}
if (s->buf_ptr == s->buf + 4)
{
s->timestamp = s->cur_timestamp;
}
/* add the packet */
if (size > max_packet_size)
{
/* big packet: fragment */
count = 0;
while (size > 0)
{
len = max_packet_size - 4;
if (len > size)
len = size;
/* build fragmented packet */
s->buf[0] = 0;
s->buf[1] = 0;
s->buf[2] = count >> 8;
s->buf[3] = count;
memcpy(s->buf + 4, buf1, len);
ff_rtp_send_data(s1, s->buf, len + 4, 0);
size -= len;
buf1 += len;
count += len;
}
}
/* send an integer number of samples and compute time stamp and fill
the rtp send buffer before sending. */
static void rtp_send_samples(AVFormatContext *s1,
const uint8_t *buf1, int size, int sample_size)
{
RTPMuxContext *s = s1->priv_data;
int len, max_packet_size, n;
/* modify max packet size to 20ms according to rtp default */
//max_packet_size = (s->max_payload_size / sample_size) * sample_size;
max_packet_size = 160 * sample_size;
/* not needed, but who nows */
if ((size % sample_size) != 0)
av_abort();
n = 0;
s->buf_ptr = s->buf;
if (s->stock_len > 0) {
memcpy(s->buf, s->stock_buf, s->stock_len);
s->buf_ptr += s->stock_len;
s->stock_len = 0;
}
//while (size > 0) {
while (size+s->buf_ptr-s->buf >= max_packet_size) {
//s->buf_ptr = s->buf;
len = FFMIN(max_packet_size, size) - (s->buf_ptr-s->buf);
/* copy data */
memcpy(s->buf_ptr, buf1, len);
s->buf_ptr += len;
buf1 += len;
size -= len;
s->timestamp = s->cur_timestamp + n / sample_size;
ff_rtp_send_data(s1, s->buf, s->buf_ptr - s->buf, 0);
//usleep(19*1000);
n += (s->buf_ptr - s->buf);
s->buf_ptr = s->buf;
}
if (size > 0) {
memcpy(s->stock_buf, buf1, size);
s->stock_len = size;
}
s->cur_timestamp += n / sample_size;
}
/* Based on a draft spec for VP8 RTP.
* ( http://www.webmproject.org/code/specs/rtp/ ) */
void ff_rtp_send_vp8(AVFormatContext *s1, const uint8_t *buf, int size)
{
RTPMuxContext *s = s1->priv_data;
int len, max_packet_size;
s->buf_ptr = s->buf;
s->timestamp = s->cur_timestamp;
max_packet_size = s->max_payload_size - 1; // minus one for header byte
*s->buf_ptr++ = 1; // 0b1 indicates start of frame
while (size > 0) {
len = FFMIN(size, max_packet_size);
memcpy(s->buf_ptr, buf, len);
ff_rtp_send_data(s1, s->buf, len+1, size == len); // marker bit is last packet in frame
size -= len;
buf += len;
s->buf_ptr = s->buf;
*s->buf_ptr++ = 0; // payload descriptor
}
}
/**
* Packetize H.263 frames into RTP packets according to RFC 4629
*/
void ff_rtp_send_h263(AVFormatContext *s1, const uint8_t *buf1, int size)
{
RTPMuxContext *s = s1->priv_data;
int len, max_packet_size;
uint8_t *q;
max_packet_size = s->max_payload_size;
while (size > 0) {
q = s->buf;
if (size >= 2 && (buf1[0] == 0) && (buf1[1] == 0)) {
*q++ = 0x04;
buf1 += 2;
size -= 2;
} else {
*q++ = 0;
}
*q++ = 0;
len = FFMIN(max_packet_size - 2, size);
/* Look for a better place to split the frame into packets. */
if (len < size) {
const uint8_t *end = find_resync_marker_reverse(buf1, buf1 + len);
len = end - buf1;
}
memcpy(q, buf1, len);
q += len;
/* 90 KHz time stamp */
s->timestamp = s->cur_timestamp;
ff_rtp_send_data(s1, s->buf, q - s->buf, (len == size));
buf1 += len;
size -= len;
}
}
/* Based on a draft spec for VP8 RTP.
* ( http://tools.ietf.org/html/draft-ietf-payload-vp8-05 ) */
void ff_rtp_send_vp8(AVFormatContext *s1, const uint8_t *buf, int size)
{
RTPMuxContext *s = s1->priv_data;
int len, max_packet_size;
s->buf_ptr = s->buf;
s->timestamp = s->cur_timestamp;
max_packet_size = s->max_payload_size - 1; // minus one for header byte
// no extended control bits, reference frame, start of partition,
// partition id 0
*s->buf_ptr++ = 0x10;
while (size > 0) {
len = FFMIN(size, max_packet_size);
memcpy(s->buf_ptr, buf, len);
ff_rtp_send_data(s1, s->buf, len+1, size == len); // marker bit is last packet in frame
size -= len;
buf += len;
s->buf_ptr = s->buf;
*s->buf_ptr++ = 0; // payload descriptor
}
}
void ff_rtp_send_jpeg(AVFormatContext *s1, const uint8_t *buf, int size)
{
RTPMuxContext *s = s1->priv_data;
const uint8_t *qtables[4] = { NULL };
int nb_qtables = 0;
uint8_t type;
uint8_t w, h;
uint8_t *p;
int off = 0; /* fragment offset of the current JPEG frame */
int len;
int i;
int default_huffman_tables = 0;
s->buf_ptr = s->buf;
s->timestamp = s->cur_timestamp;
/* convert video pixel dimensions from pixels to blocks */
w = AV_CEIL_RSHIFT(s1->streams[0]->codecpar->width, 3);
h = AV_CEIL_RSHIFT(s1->streams[0]->codecpar->height, 3);
/* get the pixel format type or fail */
if (s1->streams[0]->codecpar->format == AV_PIX_FMT_YUVJ422P ||
(s1->streams[0]->codecpar->color_range == AVCOL_RANGE_JPEG &&
s1->streams[0]->codecpar->format == AV_PIX_FMT_YUV422P)) {
type = 0;
} else if (s1->streams[0]->codecpar->format == AV_PIX_FMT_YUVJ420P ||
(s1->streams[0]->codecpar->color_range == AVCOL_RANGE_JPEG &&
s1->streams[0]->codecpar->format == AV_PIX_FMT_YUV420P)) {
type = 1;
} else {
av_log(s1, AV_LOG_ERROR, "Unsupported pixel format\n");
return;
}
/* preparse the header for getting some infos */
for (i = 0; i < size; i++) {
if (buf[i] != 0xff)
continue;
if (buf[i + 1] == DQT) {
int tables, j;
if (buf[i + 4] & 0xF0)
av_log(s1, AV_LOG_WARNING,
"Only 8-bit precision is supported.\n");
/* a quantization table is 64 bytes long */
tables = AV_RB16(&buf[i + 2]) / 65;
if (i + 5 + tables * 65 > size) {
av_log(s1, AV_LOG_ERROR, "Too short JPEG header. Aborted!\n");
return;
}
if (nb_qtables + tables > 4) {
av_log(s1, AV_LOG_ERROR, "Invalid number of quantisation tables\n");
return;
}
for (j = 0; j < tables; j++)
qtables[nb_qtables + j] = buf + i + 5 + j * 65;
nb_qtables += tables;
} else if (buf[i + 1] == SOF0) {
if (buf[i + 14] != 17 || buf[i + 17] != 17) {
av_log(s1, AV_LOG_ERROR,
"Only 1x1 chroma blocks are supported. Aborted!\n");
return;
}
} else if (buf[i + 1] == DHT) {
int dht_size = AV_RB16(&buf[i + 2]);
default_huffman_tables |= 1 << 4;
i += 3;
dht_size -= 2;
if (i + dht_size >= size)
continue;
while (dht_size > 0)
switch (buf[i + 1]) {
case 0x00:
if ( dht_size >= 29
&& !memcmp(buf + i + 2, avpriv_mjpeg_bits_dc_luminance + 1, 16)
&& !memcmp(buf + i + 18, avpriv_mjpeg_val_dc, 12)) {
default_huffman_tables |= 1;
i += 29;
dht_size -= 29;
} else {
i += dht_size;
dht_size = 0;
}
break;
case 0x01:
if ( dht_size >= 29
&& !memcmp(buf + i + 2, avpriv_mjpeg_bits_dc_chrominance + 1, 16)
&& !memcmp(buf + i + 18, avpriv_mjpeg_val_dc, 12)) {
default_huffman_tables |= 1 << 1;
i += 29;
dht_size -= 29;
} else {
i += dht_size;
dht_size = 0;
}
break;
case 0x10:
if ( dht_size >= 179
&& !memcmp(buf + i + 2, avpriv_mjpeg_bits_ac_luminance + 1, 16)
&& !memcmp(buf + i + 18, avpriv_mjpeg_val_ac_luminance, 162)) {
default_huffman_tables |= 1 << 2;
i += 179;
dht_size -= 179;
} else {
i += dht_size;
dht_size = 0;
}
break;
case 0x11:
if ( dht_size >= 179
&& !memcmp(buf + i + 2, avpriv_mjpeg_bits_ac_chrominance + 1, 16)
&& !memcmp(buf + i + 18, avpriv_mjpeg_val_ac_chrominance, 162)) {
default_huffman_tables |= 1 << 3;
i += 179;
dht_size -= 179;
} else {
i += dht_size;
dht_size = 0;
}
break;
default:
i += dht_size;
dht_size = 0;
continue;
}
} else if (buf[i + 1] == SOS) {
/* SOS is last marker in the header */
i += AV_RB16(&buf[i + 2]) + 2;
if (i > size) {
av_log(s1, AV_LOG_ERROR,
"Insufficient data. Aborted!\n");
return;
}
break;
}
}
if (default_huffman_tables && default_huffman_tables != 31) {
av_log(s1, AV_LOG_ERROR,
"RFC 2435 requires standard Huffman tables for jpeg\n");
return;
}
if (nb_qtables && nb_qtables != 2)
av_log(s1, AV_LOG_WARNING,
"RFC 2435 suggests two quantization tables, %d provided\n",
nb_qtables);
/* skip JPEG header */
buf += i;
size -= i;
for (i = size - 2; i >= 0; i--) {
if (buf[i] == 0xff && buf[i + 1] == EOI) {
/* Remove the EOI marker */
size = i;
break;
}
}
p = s->buf_ptr;
while (size > 0) {
int hdr_size = 8;
if (off == 0 && nb_qtables)
hdr_size += 4 + 64 * nb_qtables;
/* payload max in one packet */
len = FFMIN(size, s->max_payload_size - hdr_size);
/* set main header */
bytestream_put_byte(&p, 0);
bytestream_put_be24(&p, off);
bytestream_put_byte(&p, type);
bytestream_put_byte(&p, 255);
bytestream_put_byte(&p, w);
bytestream_put_byte(&p, h);
if (off == 0 && nb_qtables) {
/* set quantization tables header */
bytestream_put_byte(&p, 0);
bytestream_put_byte(&p, 0);
bytestream_put_be16(&p, 64 * nb_qtables);
for (i = 0; i < nb_qtables; i++)
bytestream_put_buffer(&p, qtables[i], 64);
}
/* copy payload data */
memcpy(p, buf, len);
/* marker bit is last packet in frame */
ff_rtp_send_data(s1, s->buf, len + hdr_size, size == len);
buf += len;
size -= len;
off += len;
p = s->buf;
}
}
void ff_rtp_send_jpeg(AVFormatContext *s1, const uint8_t *buf, int size)
{
RTPMuxContext *s = s1->priv_data;
const uint8_t *qtables = NULL;
int nb_qtables = 0;
uint8_t type;
uint8_t w, h;
uint8_t *p;
int off = 0; /* fragment offset of the current JPEG frame */
int len;
int i;
s->buf_ptr = s->buf;
s->timestamp = s->cur_timestamp;
/* convert video pixel dimensions from pixels to blocks */
w = (s1->streams[0]->codec->width + 7) >> 3;
h = (s1->streams[0]->codec->height + 7) >> 3;
/* get the pixel format type or fail */
if (s1->streams[0]->codec->pix_fmt == AV_PIX_FMT_YUVJ422P ||
(s1->streams[0]->codec->color_range == AVCOL_RANGE_JPEG &&
s1->streams[0]->codec->pix_fmt == AV_PIX_FMT_YUV422P)) {
type = 0;
} else if (s1->streams[0]->codec->pix_fmt == AV_PIX_FMT_YUVJ420P ||
(s1->streams[0]->codec->color_range == AVCOL_RANGE_JPEG &&
s1->streams[0]->codec->pix_fmt == AV_PIX_FMT_YUV420P)) {
type = 1;
} else {
av_log(s1, AV_LOG_ERROR, "Unsupported pixel format\n");
return;
}
/* preparse the header for getting some infos */
for (i = 0; i < size; i++) {
if (buf[i] != 0xff)
continue;
if (buf[i + 1] == DQT) {
if (buf[i + 4])
av_log(s1, AV_LOG_WARNING,
"Only 8-bit precision is supported.\n");
/* a quantization table is 64 bytes long */
nb_qtables = AV_RB16(&buf[i + 2]) / 65;
if (i + 4 + nb_qtables * 65 > size) {
av_log(s1, AV_LOG_ERROR, "Too short JPEG header. Aborted!\n");
return;
}
qtables = &buf[i + 4];
} else if (buf[i + 1] == SOF0) {
if (buf[i + 14] != 17 || buf[i + 17] != 17) {
av_log(s1, AV_LOG_ERROR,
"Only 1x1 chroma blocks are supported. Aborted!\n");
return;
}
} else if (buf[i + 1] == SOS) {
/* SOS is last marker in the header */
i += AV_RB16(&buf[i + 2]) + 2;
break;
}
}
/* skip JPEG header */
buf += i;
size -= i;
for (i = size - 2; i >= 0; i--) {
if (buf[i] == 0xff && buf[i + 1] == EOI) {
/* Remove the EOI marker */
size = i;
break;
}
}
p = s->buf_ptr;
while (size > 0) {
int hdr_size = 8;
if (off == 0 && nb_qtables)
hdr_size += 4 + 64 * nb_qtables;
/* payload max in one packet */
len = FFMIN(size, s->max_payload_size - hdr_size);
/* set main header */
bytestream_put_byte(&p, 0);
bytestream_put_be24(&p, off);
bytestream_put_byte(&p, type);
bytestream_put_byte(&p, 255);
bytestream_put_byte(&p, w);
bytestream_put_byte(&p, h);
if (off == 0 && nb_qtables) {
/* set quantization tables header */
bytestream_put_byte(&p, 0);
bytestream_put_byte(&p, 0);
bytestream_put_be16(&p, 64 * nb_qtables);
for (i = 0; i < nb_qtables; i++)
bytestream_put_buffer(&p, &qtables[65 * i + 1], 64);
}
/* copy payload data */
memcpy(p, buf, len);
/* marker bit is last packet in frame */
ff_rtp_send_data(s1, s->buf, len + hdr_size, size == len);
buf += len;
size -= len;
off += len;
p = s->buf;
}
}
