* RTP output format
* Copyright (c) 2002 Fabrice Bellard
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav 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 FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avformat.h"
#include "mpegts.h"
#include "internal.h"
+#include "libavutil/mathematics.h"
#include "libavutil/random_seed.h"
+#include "libavutil/opt.h"
#include "rtpenc.h"
//#define DEBUG
+static const AVOption options[] = {
+ FF_RTP_FLAG_OPTS(RTPMuxContext, flags),
+ { "payload_type", "Specify RTP payload type", offsetof(RTPMuxContext, payload_type), AV_OPT_TYPE_INT, {.dbl = -1 }, -1, 127, AV_OPT_FLAG_ENCODING_PARAM },
+ { NULL },
+};
+
+static const AVClass rtp_muxer_class = {
+ .class_name = "RTP muxer",
+ .item_name = av_default_item_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
#define RTCP_SR_SIZE 28
static int is_supported(enum CodecID id)
case CODEC_ID_VORBIS:
case CODEC_ID_THEORA:
case CODEC_ID_VP8:
+ case CODEC_ID_ADPCM_G722:
+ case CODEC_ID_ADPCM_G726:
return 1;
default:
return 0;
return -1;
}
- s->payload_type = ff_rtp_get_payload_type(st->codec);
if (s->payload_type < 0)
- s->payload_type = RTP_PT_PRIVATE + (st->codec->codec_type == AVMEDIA_TYPE_AUDIO);
-
+ s->payload_type = ff_rtp_get_payload_type(s1, st->codec);
s->base_timestamp = av_get_random_seed();
s->timestamp = s->base_timestamp;
s->cur_timestamp = 0;
s->first_rtcp_ntp_time = (s1->start_time_realtime / 1000) * 1000 +
NTP_OFFSET_US;
- max_packet_size = url_fget_max_packet_size(s1->pb);
+ max_packet_size = s1->pb->max_packet_size;
if (max_packet_size <= 12)
return AVERROR(EIO);
s->buf = av_malloc(max_packet_size);
if (st->codec->frame_size == 0) {
av_log(s1, AV_LOG_ERROR, "Cannot respect max delay: frame size = 0\n");
} else {
- s->max_frames_per_packet = av_rescale_rnd(s1->max_delay, st->codec->sample_rate, AV_TIME_BASE * st->codec->frame_size, AV_ROUND_DOWN);
+ s->max_frames_per_packet = av_rescale_rnd(s1->max_delay, st->codec->sample_rate, AV_TIME_BASE * (int64_t)st->codec->frame_size, AV_ROUND_DOWN);
}
}
if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
}
}
- av_set_pts_info(st, 32, 1, 90000);
+ avpriv_set_pts_info(st, 32, 1, 90000);
switch(st->codec->codec_id) {
case CODEC_ID_MP2:
case CODEC_ID_MP3:
s->num_frames = 0;
goto defaultcase;
case CODEC_ID_VP8:
- av_log(s1, AV_LOG_WARNING, "RTP VP8 payload is still experimental\n");
+ av_log(s1, AV_LOG_ERROR, "RTP VP8 payload implementation is "
+ "incompatible with the latest spec drafts.\n");
+ break;
+ case CODEC_ID_ADPCM_G722:
+ /* Due to a historical error, the clock rate for G722 in RTP is
+ * 8000, even if the sample rate is 16000. See RFC 3551. */
+ avpriv_set_pts_info(st, 32, 1, 8000);
break;
case CODEC_ID_AMR_NB:
case CODEC_ID_AMR_WB:
default:
defaultcase:
if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
- av_set_pts_info(st, 32, 1, st->codec->sample_rate);
+ avpriv_set_pts_info(st, 32, 1, st->codec->sample_rate);
}
s->buf_ptr = s->buf;
break;
RTPMuxContext *s = s1->priv_data;
uint32_t rtp_ts;
- dprintf(s1, "RTCP: %02x %"PRIx64" %x\n", s->payload_type, ntp_time, s->timestamp);
+ av_dlog(s1, "RTCP: %02x %"PRIx64" %x\n", s->payload_type, ntp_time, s->timestamp);
s->last_rtcp_ntp_time = ntp_time;
rtp_ts = av_rescale_q(ntp_time - s->first_rtcp_ntp_time, (AVRational){1, 1000000},
s1->streams[0]->time_base) + s->base_timestamp;
- put_byte(s1->pb, (RTP_VERSION << 6));
- put_byte(s1->pb, RTCP_SR);
- put_be16(s1->pb, 6); /* length in words - 1 */
- put_be32(s1->pb, s->ssrc);
- put_be32(s1->pb, ntp_time / 1000000);
- put_be32(s1->pb, ((ntp_time % 1000000) << 32) / 1000000);
- put_be32(s1->pb, rtp_ts);
- put_be32(s1->pb, s->packet_count);
- put_be32(s1->pb, s->octet_count);
- put_flush_packet(s1->pb);
+ avio_w8(s1->pb, (RTP_VERSION << 6));
+ avio_w8(s1->pb, RTCP_SR);
+ avio_wb16(s1->pb, 6); /* length in words - 1 */
+ avio_wb32(s1->pb, s->ssrc);
+ avio_wb32(s1->pb, ntp_time / 1000000);
+ avio_wb32(s1->pb, ((ntp_time % 1000000) << 32) / 1000000);
+ avio_wb32(s1->pb, rtp_ts);
+ avio_wb32(s1->pb, s->packet_count);
+ avio_wb32(s1->pb, s->octet_count);
+ avio_flush(s1->pb);
}
/* send an rtp packet. sequence number is incremented, but the caller
{
RTPMuxContext *s = s1->priv_data;
- dprintf(s1, "rtp_send_data size=%d\n", len);
+ av_dlog(s1, "rtp_send_data size=%d\n", len);
/* build the RTP header */
- put_byte(s1->pb, (RTP_VERSION << 6));
- put_byte(s1->pb, (s->payload_type & 0x7f) | ((m & 0x01) << 7));
- put_be16(s1->pb, s->seq);
- put_be32(s1->pb, s->timestamp);
- put_be32(s1->pb, s->ssrc);
+ avio_w8(s1->pb, (RTP_VERSION << 6));
+ avio_w8(s1->pb, (s->payload_type & 0x7f) | ((m & 0x01) << 7));
+ avio_wb16(s1->pb, s->seq);
+ avio_wb32(s1->pb, s->timestamp);
+ avio_wb32(s1->pb, s->ssrc);
- put_buffer(s1->pb, buf1, len);
- put_flush_packet(s1->pb);
+ avio_write(s1->pb, buf1, len);
+ avio_flush(s1->pb);
s->seq++;
s->octet_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)
+ 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 / sample_size) * sample_size;
- /* not needed, but who nows */
- if ((size % sample_size) != 0)
+ 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)
av_abort();
n = 0;
while (size > 0) {
s->buf_ptr += len;
buf1 += len;
size -= len;
- s->timestamp = s->cur_timestamp + n / sample_size;
+ 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);
}
int rtcp_bytes;
int size= pkt->size;
- dprintf(s1, "%d: write len=%d\n", pkt->stream_index, size);
+ av_dlog(s1, "%d: write len=%d\n", pkt->stream_index, size);
rtcp_bytes = ((s->octet_count - s->last_octet_count) * RTCP_TX_RATIO_NUM) /
RTCP_TX_RATIO_DEN;
case CODEC_ID_PCM_ALAW:
case CODEC_ID_PCM_U8:
case CODEC_ID_PCM_S8:
- rtp_send_samples(s1, pkt->data, size, 1 * st->codec->channels);
+ rtp_send_samples(s1, pkt->data, size, 8 * st->codec->channels);
break;
case CODEC_ID_PCM_U16BE:
case CODEC_ID_PCM_U16LE:
case CODEC_ID_PCM_S16BE:
case CODEC_ID_PCM_S16LE:
- rtp_send_samples(s1, pkt->data, size, 2 * st->codec->channels);
+ rtp_send_samples(s1, pkt->data, size, 16 * st->codec->channels);
+ break;
+ case CODEC_ID_ADPCM_G722:
+ /* The actual sample size is half a byte per sample, but since the
+ * stream clock rate is 8000 Hz while the sample rate is 16000 Hz,
+ * the correct parameter for send_samples_bits is 8 bits per stream
+ * clock. */
+ rtp_send_samples(s1, pkt->data, size, 8 * st->codec->channels);
+ break;
+ case CODEC_ID_ADPCM_G726:
+ rtp_send_samples(s1, pkt->data, size,
+ st->codec->bits_per_coded_sample * st->codec->channels);
break;
case CODEC_ID_MP2:
case CODEC_ID_MP3:
ff_rtp_send_mpegvideo(s1, pkt->data, size);
break;
case CODEC_ID_AAC:
- ff_rtp_send_aac(s1, pkt->data, size);
+ if (s->flags & FF_RTP_FLAG_MP4A_LATM)
+ ff_rtp_send_latm(s1, pkt->data, size);
+ else
+ ff_rtp_send_aac(s1, pkt->data, size);
break;
case CODEC_ID_AMR_NB:
case CODEC_ID_AMR_WB:
return 0;
}
-AVOutputFormat rtp_muxer = {
- "rtp",
- NULL_IF_CONFIG_SMALL("RTP output format"),
- NULL,
- NULL,
- sizeof(RTPMuxContext),
- CODEC_ID_PCM_MULAW,
- CODEC_ID_NONE,
- rtp_write_header,
- rtp_write_packet,
- rtp_write_trailer,
+AVOutputFormat ff_rtp_muxer = {
+ .name = "rtp",
+ .long_name = NULL_IF_CONFIG_SMALL("RTP output format"),
+ .priv_data_size = sizeof(RTPMuxContext),
+ .audio_codec = CODEC_ID_PCM_MULAW,
+ .video_codec = CODEC_ID_MPEG4,
+ .write_header = rtp_write_header,
+ .write_packet = rtp_write_packet,
+ .write_trailer = rtp_write_trailer,
+ .priv_class = &rtp_muxer_class,
};
projects / ffmpeg / blobdiff