[FFmpeg-soc] [soc]: r1110 - dvbmuxer/mpegtsenc.c
realsun
subversion at mplayerhq.hu
Tue Aug 21 02:44:07 CEST 2007
Author: realsun
Date: Tue Aug 21 02:44:07 2007
New Revision: 1110
Log:
add modified TS muxer file
Added:
dvbmuxer/mpegtsenc.c
Added: dvbmuxer/mpegtsenc.c
==============================================================================
--- (empty file)
+++ dvbmuxer/mpegtsenc.c Tue Aug 21 02:44:07 2007
@@ -0,0 +1,840 @@
+/*
+ * MPEG2 transport stream (aka DVB) muxer
+ * Copyright (c) 2003 Fabrice Bellard.
+ *
+ * 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 2.1 of the License, or (at your option) any later version.
+ *
+ * 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+#include "avformat.h"
+#include "crc.h"
+#include "mpegts.h"
+#include "bytestream.h"
+#include "mpeg_pes.h"
+
+/* write DVB SI sections */
+
+/*********************************************/
+/* mpegts section writer */
+
+typedef struct MpegTSSection {
+ int pid;
+ int cc;
+ void (*write_packet)(struct MpegTSSection *s, const uint8_t *packet);
+ void *opaque;
+} MpegTSSection;
+
+/* NOTE: 4 bytes must be left at the end for the crc32 */
+static void mpegts_write_section(MpegTSSection *s, uint8_t *buf, int len)
+{
+ unsigned int crc;
+ unsigned char packet[TS_PACKET_SIZE];
+ const unsigned char *buf_ptr;
+ unsigned char *q;
+ int first, b, len1, left;
+
+ crc = bswap_32(av_crc(av_crc04C11DB7, -1, buf, len - 4));
+ buf[len - 4] = (crc >> 24) & 0xff;
+ buf[len - 3] = (crc >> 16) & 0xff;
+ buf[len - 2] = (crc >> 8) & 0xff;
+ buf[len - 1] = (crc) & 0xff;
+
+ /* send each packet */
+ buf_ptr = buf;
+ while (len > 0) {
+ first = (buf == buf_ptr);
+ q = packet;
+ *q++ = 0x47;
+ b = (s->pid >> 8);
+ if (first)
+ b |= 0x40;
+ *q++ = b;
+ *q++ = s->pid;
+ s->cc = (s->cc) & 0xf;
+ *q++ = 0x10 | s->cc;
+ s->cc++;
+ if (first)
+ *q++ = 0; /* 0 offset */
+ len1 = TS_PACKET_SIZE - (q - packet);
+ if (len1 > len)
+ len1 = len;
+ memcpy(q, buf_ptr, len1);
+ q += len1;
+ /* add known padding data */
+ left = TS_PACKET_SIZE - (q - packet);
+ if (left > 0)
+ memset(q, 0xff, left);
+
+ s->write_packet(s, packet);
+
+ buf_ptr += len1;
+ len -= len1;
+ }
+}
+
+static inline void put16(uint8_t **q_ptr, int val)
+{
+ uint8_t *q;
+ q = *q_ptr;
+ *q++ = val >> 8;
+ *q++ = val;
+ *q_ptr = q;
+}
+
+static int mpegts_write_section1(MpegTSSection *s, int tid, int id,
+ int version, int sec_num, int last_sec_num,
+ uint8_t *buf, int len)
+{
+ uint8_t section[1024], *q;
+ unsigned int tot_len;
+
+ tot_len = 3 + 5 + len + 4;
+ /* check if not too big */
+ if (tot_len > 1024)
+ return -1;
+
+ q = section;
+ *q++ = tid;
+ put16(&q, 0xb000 | (len + 5 + 4)); /* 5 byte header + 4 byte CRC */
+ put16(&q, id);
+ *q++ = 0xc1 | (version << 1); /* current_next_indicator = 1 */
+ *q++ = sec_num;
+ *q++ = last_sec_num;
+ memcpy(q, buf, len);
+
+ mpegts_write_section(s, section, tot_len);
+ return 0;
+}
+
+/*********************************************/
+/* mpegts writer */
+
+#define DEFAULT_PMT_START_PID 0x1000
+#define DEFAULT_START_PID 0x0100
+#define DEFAULT_PROVIDER_NAME "FFmpeg"
+#define DEFAULT_SERVICE_NAME "Service01"
+
+/* default network id, transport stream and service identifiers */
+#define DEFAULT_ONID 0x0001
+#define DEFAULT_TSID 0x0001
+#define DEFAULT_SID 0x0001
+
+/* a PES packet header is generated every DEFAULT_PES_HEADER_FREQ packets */
+#define DEFAULT_PES_HEADER_FREQ 16
+#define DEFAULT_PES_PAYLOAD_SIZE ((DEFAULT_PES_HEADER_FREQ - 1) * 184 + 170)
+
+/* we retransmit the SI info at this rate */
+#define SDT_RETRANS_TIME 500
+#define PAT_RETRANS_TIME 100
+#define PCR_RETRANS_TIME 20
+
+
+/**
+ * lookup table from codec id to pes stream id
+ */
+static int pes_streamid[5] = {
+ 0xe0, /**< CODEC_TYPE_VIDEO */
+ 0xc0, /**< CODEC_TYPE_AUDIO */
+ 0xbd, /**< CODEC_TYPE_DATA */
+ 0xbd, /**< CODEC_TYPE_SUBTITLE */
+ 0xbd /**< CODEC_TYPE_NB */
+};
+
+typedef struct MpegTSWriteStream {
+ PESStream pes_stream;
+ int packet_size;
+ int packet_number;
+ int startcode; /**< PES header start code */
+ uint8_t id;
+ struct MpegTSService *service;
+ int pid; /* stream associated pid */
+ int cc;
+ int payload_index;
+ int64_t payload_pts;
+ int64_t payload_dts;
+ uint8_t payload[DEFAULT_PES_PAYLOAD_SIZE];
+} MpegTSWriteStream;
+
+typedef struct MpegTSService {
+ MpegTSSection pmt; /* MPEG2 pmt table context */
+ int sid; /* service ID */
+ char *name;
+ char *provider_name;
+ int pcr_pid;
+ int pcr_packet_count;
+ int pcr_packet_freq;
+} MpegTSService;
+
+typedef struct MpegTSWrite {
+ PESContext pes_context;
+ MpegTSSection pat; /* MPEG2 pat table */
+ MpegTSSection sdt; /* MPEG2 sdt table context */
+ MpegTSService **services;
+ int sdt_packet_count;
+ int sdt_packet_freq;
+ int pat_packet_count;
+ int pat_packet_freq;
+ int nb_services;
+ int onid;
+ int tsid;
+ int packet_number;
+ int64_t last_pcr; /* current programme clock reference */
+ int mux_rate;
+ int packet_size;
+} MpegTSWrite;
+
+static void mpegts_write_pat(AVFormatContext *s)
+{
+ MpegTSWrite *ts = s->priv_data;
+ MpegTSService *service;
+ uint8_t data[1012], *q;
+ int i;
+
+ q = data;
+ for(i = 0; i < ts->nb_services; i++) {
+ service = ts->services[i];
+ put16(&q, service->sid);
+ put16(&q, 0xe000 | service->pmt.pid);
+ }
+ mpegts_write_section1(&ts->pat, PAT_TID, ts->tsid, 0, 0, 0,
+ data, q - data);
+}
+
+static void mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
+{
+ // MpegTSWrite *ts = s->priv_data;
+ uint8_t data[1012], *q, *desc_length_ptr, *program_info_length_ptr;
+ int val, stream_type, i;
+
+ q = data;
+ put16(&q, 0xe000 | service->pcr_pid);
+
+ program_info_length_ptr = q;
+ q += 2; /* patched after */
+
+ /* put program info here */
+
+ val = 0xf000 | (q - program_info_length_ptr - 2);
+ program_info_length_ptr[0] = val >> 8;
+ program_info_length_ptr[1] = val;
+
+ for(i = 0; i < s->nb_streams; i++) {
+ AVStream *st = s->streams[i];
+ MpegTSWriteStream *ts_st = st->priv_data;
+ switch(st->codec->codec_id) {
+ case CODEC_ID_MPEG1VIDEO:
+ case CODEC_ID_MPEG2VIDEO:
+ stream_type = STREAM_TYPE_VIDEO_MPEG2;
+ break;
+ case CODEC_ID_MPEG4:
+ stream_type = STREAM_TYPE_VIDEO_MPEG4;
+ break;
+ case CODEC_ID_H264:
+ stream_type = STREAM_TYPE_VIDEO_H264;
+ break;
+ case CODEC_ID_MP2:
+ case CODEC_ID_MP3:
+ stream_type = STREAM_TYPE_AUDIO_MPEG1;
+ break;
+ case CODEC_ID_AAC:
+ stream_type = STREAM_TYPE_AUDIO_AAC;
+ break;
+ case CODEC_ID_AC3:
+ stream_type = STREAM_TYPE_AUDIO_AC3;
+ break;
+ default:
+ stream_type = STREAM_TYPE_PRIVATE_DATA;
+ break;
+ }
+ *q++ = stream_type;
+ put16(&q, 0xe000 | ts_st->pid);
+ desc_length_ptr = q;
+ q += 2; /* patched after */
+
+ /* write optional descriptors here */
+ switch(st->codec->codec_type) {
+ case CODEC_TYPE_AUDIO:
+ if (strlen(st->language) == 3) {
+ *q++ = 0x0a; /* ISO 639 language descriptor */
+ *q++ = 4;
+ *q++ = st->language[0];
+ *q++ = st->language[1];
+ *q++ = st->language[2];
+ *q++ = 0; /* undefined type */
+ }
+ break;
+ case CODEC_TYPE_SUBTITLE:
+ {
+ const char *language;
+ language = st->language;
+ if (strlen(language) != 3)
+ language = "eng";
+ *q++ = 0x59;
+ *q++ = 8;
+ *q++ = language[0];
+ *q++ = language[1];
+ *q++ = language[2];
+ *q++ = 0x10; /* normal subtitles (0x20 = if hearing pb) */
+ put16(&q, 1); /* page id */
+ put16(&q, 1); /* ancillary page id */
+ }
+ break;
+ }
+
+ val = 0xf000 | (q - desc_length_ptr - 2);
+ desc_length_ptr[0] = val >> 8;
+ desc_length_ptr[1] = val;
+ }
+ mpegts_write_section1(&service->pmt, PMT_TID, service->sid, 0, 0, 0,
+ data, q - data);
+}
+
+/* NOTE: str == NULL is accepted for an empty string */
+static void putstr8(uint8_t **q_ptr, const char *str)
+{
+ uint8_t *q;
+ int len;
+
+ q = *q_ptr;
+ if (!str)
+ len = 0;
+ else
+ len = strlen(str);
+ *q++ = len;
+ memcpy(q, str, len);
+ q += len;
+ *q_ptr = q;
+}
+
+static void mpegts_write_sdt(AVFormatContext *s)
+{
+ MpegTSWrite *ts = s->priv_data;
+ MpegTSService *service;
+ uint8_t data[1012], *q, *desc_list_len_ptr, *desc_len_ptr;
+ int i, running_status, free_ca_mode, val;
+
+ q = data;
+ put16(&q, ts->onid);
+ *q++ = 0xff;
+ for(i = 0; i < ts->nb_services; i++) {
+ service = ts->services[i];
+ put16(&q, service->sid);
+ *q++ = 0xfc | 0x00; /* currently no EIT info */
+ desc_list_len_ptr = q;
+ q += 2;
+ running_status = 4; /* running */
+ free_ca_mode = 0;
+
+ /* write only one descriptor for the service name and provider */
+ *q++ = 0x48;
+ desc_len_ptr = q;
+ q++;
+ *q++ = 0x01; /* digital television service */
+ putstr8(&q, service->provider_name);
+ putstr8(&q, service->name);
+ desc_len_ptr[0] = q - desc_len_ptr - 1;
+
+ /* fill descriptor length */
+ val = (running_status << 13) | (free_ca_mode << 12) |
+ (q - desc_list_len_ptr - 2);
+ desc_list_len_ptr[0] = val >> 8;
+ desc_list_len_ptr[1] = val;
+ }
+ mpegts_write_section1(&ts->sdt, SDT_TID, ts->tsid, 0, 0, 0,
+ data, q - data);
+}
+
+static MpegTSService *mpegts_add_service(MpegTSWrite *ts,
+ int sid,
+ const char *provider_name,
+ const char *name)
+{
+ MpegTSService *service;
+
+ service = av_mallocz(sizeof(MpegTSService));
+ if (!service)
+ return NULL;
+ service->pmt.pid = DEFAULT_PMT_START_PID + ts->nb_services - 1;
+ service->sid = sid;
+ service->provider_name = av_strdup(provider_name);
+ service->name = av_strdup(name);
+ service->pcr_pid = 0x1fff;
+ dynarray_add(&ts->services, &ts->nb_services, service);
+ return service;
+}
+
+static void section_write_packet(MpegTSSection *s, const uint8_t *packet)
+{
+ AVFormatContext *ctx = s->opaque;
+ put_buffer(&ctx->pb, packet, TS_PACKET_SIZE);
+}
+
+static int mpegts_write_header(AVFormatContext *s)
+{
+ MpegTSWrite *ts = s->priv_data;
+ MpegTSWriteStream *ts_st;
+ MpegTSService *service;
+ AVStream *st;
+ int bitrate;
+ int i;
+ const char *service_name;
+
+ ts->tsid = DEFAULT_TSID;
+ ts->onid = DEFAULT_ONID;
+ /* allocate a single DVB service */
+ service_name = s->title;
+ if (service_name[0] == '\0')
+ service_name = DEFAULT_SERVICE_NAME;
+ service = mpegts_add_service(ts, DEFAULT_SID,
+ DEFAULT_PROVIDER_NAME, service_name);
+ service->pmt.write_packet = section_write_packet;
+ service->pmt.opaque = s;
+
+ ts->packet_number = 0;
+
+ if(s->packet_size)
+ ts->packet_size = s->packet_size;
+ else
+ ts->packet_size = DEFAULT_PES_PAYLOAD_SIZE;
+
+
+ ts->pat.pid = PAT_PID;
+ ts->pat.cc = 0;
+ ts->pat.write_packet = section_write_packet;
+ ts->pat.opaque = s;
+
+ ts->sdt.pid = SDT_PID;
+ ts->sdt.cc = 0;
+ ts->sdt.write_packet = section_write_packet;
+ ts->sdt.opaque = s;
+
+ /* assign pids to each stream */
+ for(i = 0;i < s->nb_streams; i++) {
+ st = s->streams[i];
+ ts_st = av_mallocz(sizeof(MpegTSWriteStream));
+ if (!ts_st)
+ goto fail;
+ st->priv_data = ts_st;
+ ts_st->service = service;
+ ts_st->pid = DEFAULT_START_PID + i;
+ ts_st->payload_pts = AV_NOPTS_VALUE;
+ ts_st->payload_dts = AV_NOPTS_VALUE;
+ /* update PCR pid by using the first video stream */
+ if (st->codec->codec_type == CODEC_TYPE_VIDEO &&
+ service->pcr_pid == 0x1fff)
+ service->pcr_pid = ts_st->pid;
+
+ ts_st->id = pes_streamid[st->codec->codec_type];
+
+ if(ts_st->id < 0xc0)
+ ts_st->startcode = PRIVATE_STREAM_1;
+ else
+ ts_st->startcode = 0x100 + ts_st->id;
+ }
+
+ /* if no video stream, use the first stream as PCR */
+ if (service->pcr_pid == 0x1fff && s->nb_streams > 0) {
+ ts_st = s->streams[0]->priv_data;
+ service->pcr_pid = ts_st->pid;
+ }
+
+ if(ff_pes_muxer_init(s) != 0)
+ goto fail;
+
+ bitrate = 0;
+ for(i=0;i<s->nb_streams;i++) {
+ int codec_rate;
+ st = s->streams[i];
+ ts_st = (MpegTSWriteStream*) st->priv_data;
+ if(st->codec->rc_max_rate || st->codec->codec_type == CODEC_TYPE_VIDEO)
+ codec_rate= st->codec->rc_max_rate;
+ else
+ codec_rate= st->codec->bit_rate;
+
+ if(!codec_rate)
+ bitrate= (1<<21) * 8/s->nb_streams;
+ bitrate += codec_rate;
+
+ bitrate += st->codec->bit_rate;
+ }
+
+ if(s->mux_rate) {
+ ts->mux_rate= s->mux_rate;
+ } else {
+ bitrate += bitrate * 25 / (8 * DEFAULT_PES_PAYLOAD_SIZE) + /* PES header size */
+ bitrate * 4 / (8 * TS_PACKET_SIZE) + /* TS header size */
+ 500 * 12 + /* SDT size */
+ 100 * 16; /* PAT size */
+ ts->mux_rate = bitrate;
+ }
+ ts->last_pcr = 0;
+
+ service->pcr_packet_freq = (ts->mux_rate * PCR_RETRANS_TIME) /
+ (TS_PACKET_SIZE * 8 * 1000);
+ ts->sdt_packet_freq = (ts->mux_rate * SDT_RETRANS_TIME) /
+ (TS_PACKET_SIZE * 8 * 1000);
+ ts->pat_packet_freq = (ts->mux_rate * PAT_RETRANS_TIME) /
+ (TS_PACKET_SIZE * 8 * 1000);
+#if 0
+ printf("%d %d %d\n",
+ total_bit_rate, ts->sdt_packet_freq, ts->pat_packet_freq);
+#endif
+
+ /* write info at the start of the file, so that it will be fast to
+ find them */
+ mpegts_write_sdt(s);
+ mpegts_write_pat(s);
+ for(i = 0; i < ts->nb_services; i++) {
+ mpegts_write_pmt(s, ts->services[i]);
+ }
+ put_flush_packet(&s->pb);
+
+ return 0;
+
+ fail:
+ for(i = 0;i < s->nb_streams; i++) {
+ st = s->streams[i];
+ av_free(st->priv_data);
+ }
+ return -1;
+}
+
+/* send SDT, PAT and PMT tables regulary */
+static void retransmit_si_info(AVFormatContext *s)
+{
+ MpegTSWrite *ts = s->priv_data;
+ int i;
+
+ if (++ts->sdt_packet_count == ts->sdt_packet_freq) {
+ ts->sdt_packet_count = 0;
+ mpegts_write_sdt(s);
+ }
+ if (++ts->pat_packet_count == ts->pat_packet_freq) {
+ ts->pat_packet_count = 0;
+ mpegts_write_pat(s);
+ for(i = 0; i < ts->nb_services; i++) {
+ mpegts_write_pmt(s, ts->services[i]);
+ }
+ }
+}
+
+static void mpegts_write_pes(AVFormatContext *s, MpegTSWriteStream *ts_st,
+ const uint8_t *payload, int payload_size,
+ int64_t pts, int64_t dts)
+{
+ MpegTSWrite *ts = s->priv_data;
+ uint8_t buf[TS_PACKET_SIZE];
+ uint8_t *q;
+ int val, is_start, len, header_len, write_pcr;
+ int afc_len, stuffing_len;
+ int64_t pcr = -1; /* avoid warning */
+
+ int offset = 0;
+ static int p = 0;
+ is_start = 1;
+ while (payload_size > 0) {
+ retransmit_si_info(s);
+
+ p++;
+ write_pcr = 0;
+ if (ts_st->pid == ts_st->service->pcr_pid) {
+ ts_st->service->pcr_packet_count++;
+ if (ts_st->service->pcr_packet_count >=
+ ts_st->service->pcr_packet_freq && dts != AV_NOPTS_VALUE) {
+ ts_st->service->pcr_packet_count = 0;
+ write_pcr = 1;
+ pcr = ts->last_pcr + offset* 8*90000LL / ts->mux_rate;
+ }
+ }
+
+ /* prepare packet header */
+ q = buf;
+ *q++ = 0x47;
+ val = (ts_st->pid >> 8);
+ if (is_start) {
+ val |= 0x40;
+ is_start = 0;
+ }
+ *q++ = val;
+ *q++ = ts_st->pid;
+ *q++ = 0x10 | ts_st->cc | (write_pcr ? 0x20 : 0);
+ ts_st->cc = (ts_st->cc + 1) & 0xf;
+ if (write_pcr) {
+ *q++ = 7; /* AFC length */
+ *q++ = 0x10; /* flags: PCR present */
+ *q++ = pcr >> 25;
+ *q++ = pcr >> 17;
+ *q++ = pcr >> 9;
+ *q++ = pcr >> 1;
+ *q++ = (pcr & 1) << 7;
+ *q++ = 0;
+ }
+ /* header size */
+ header_len = q - buf;
+ /* data len */
+ len = TS_PACKET_SIZE - header_len;
+ if (len > payload_size)
+ len = payload_size;
+ stuffing_len = TS_PACKET_SIZE - header_len - len;
+ if (stuffing_len > 0) {
+ /* add stuffing with AFC */
+ if (buf[3] & 0x20) {
+ /* stuffing already present: increase its size */
+ afc_len = buf[4] + 1;
+ memmove(buf + 4 + afc_len + stuffing_len,
+ buf + 4 + afc_len,
+ header_len - (4 + afc_len));
+ buf[4] += stuffing_len;
+ memset(buf + 4 + afc_len, 0xff, stuffing_len);
+ } else {
+ /* add stuffing */
+ memmove(buf + 4 + stuffing_len, buf + 4, header_len - 4);
+ buf[3] |= 0x20;
+ buf[4] = stuffing_len - 1;
+ if (stuffing_len >= 2) {
+ buf[5] = 0x00;
+ memset(buf + 6, 0xff, stuffing_len - 2);
+ }
+ }
+ }
+ memcpy(buf + TS_PACKET_SIZE - len, payload + offset, len);
+ offset += len;
+ payload_size -= len;
+ put_buffer(&s->pb, buf, TS_PACKET_SIZE);
+ }
+ put_flush_packet(&s->pb);
+}
+
+/* Write an MPEG padding packet header. */
+static void put_padding_packet(uint8_t** pes_payload, int packet_bytes)
+{
+ int i;
+
+ bytestream_put_be32(pes_payload, PADDING_STREAM);
+ bytestream_put_be16(pes_payload, packet_bytes - 6);
+ packet_bytes -= 6;
+
+ for(i=0;i<packet_bytes;i++)
+ bytestream_put_byte(pes_payload, 0xff);
+}
+/* flush the packet on stream stream_index */
+static int flush_packet(AVFormatContext *ctx, int stream_index,
+ int64_t pts, int64_t dts, int64_t pcr, int trailer_size)
+{
+ MpegTSWrite *s = ctx->priv_data;
+ MpegTSWriteStream *stream = ctx->streams[stream_index]->priv_data;
+ PESContext* pes_context = &s->pes_context;
+ PESStream *pes_stream = &stream->pes_stream;
+ int payload_size, id, stuffing_size, i, header_len;
+ int packet_size, es_size;
+ int zero_trail_bytes = 0;
+ int pad_packet_bytes = 0;
+ int general_pack = 0; /*"general" pack without data specific to one stream?*/
+ int pes_size;
+ uint8_t* q = stream->payload;
+
+ id = stream->id;
+ packet_size = s->packet_size;
+
+ if (packet_size > 0) {
+
+ /* packet header size */
+ packet_size -= 6;
+
+ /* packet header */
+ header_len = 3;
+ header_len += 1; /* obligatory stuffing byte */
+ if (pts != AV_NOPTS_VALUE) {
+ if (dts != pts)
+ header_len += 5 + 5;
+ else
+ header_len += 5;
+ }
+ payload_size = packet_size - header_len;
+
+ stuffing_size = payload_size - av_fifo_size(&pes_stream->fifo);
+
+ // first byte does not fit -> reset pts/dts + stuffing
+ if(payload_size <= trailer_size && pts != AV_NOPTS_VALUE){
+ int timestamp_len=0;
+ if(dts != pts)
+ timestamp_len += 5;
+ if(pts != AV_NOPTS_VALUE)
+ timestamp_len += 5;
+ pts=dts= AV_NOPTS_VALUE;
+ header_len -= timestamp_len;
+ payload_size += timestamp_len;
+ stuffing_size += timestamp_len;
+ if(payload_size > trailer_size)
+ stuffing_size += payload_size - trailer_size;
+ }
+
+ if (stuffing_size < 0)
+ stuffing_size = 0;
+ if (stuffing_size > 16) { /*<=16 for MPEG-1, <=32 for MPEG-2*/
+ pad_packet_bytes += stuffing_size;
+ packet_size -= stuffing_size;
+ payload_size -= stuffing_size;
+ stuffing_size = 0;
+ }
+ pes_context->packet_number = s->packet_number;
+ pes_context->muxer_type = PESMUXER_TS;
+ pes_size = ff_pes_muxer_write(ctx, stream_index, stream->payload, pts, dts, id, stream->startcode, NULL, 0,
+ header_len, packet_size, payload_size, stuffing_size);
+ if(pes_size < 0)
+ return -1;
+ q += pes_size;
+ }else{
+ payload_size=
+ stuffing_size= 0;
+ }
+
+ if (pad_packet_bytes > 0)
+ put_padding_packet(&q, pad_packet_bytes);
+
+ for(i=0;i<zero_trail_bytes;i++)
+ bytestream_put_byte(&q, 0x00);
+
+ mpegts_write_pes(ctx, stream, stream->payload, q - stream->payload, pts, dts);
+ put_flush_packet(&ctx->pb);
+
+ s->packet_number++;
+
+ /* only increase the stream packet number if this pack actually contains
+ something that is specific to this stream! I.e. a dedicated header
+ or some data.*/
+ if (!general_pack)
+ stream->packet_number++;
+
+ es_size = payload_size - stuffing_size;
+ pes_stream->buffer_index += payload_size - stuffing_size;
+ while(pes_stream->premux_packet && pes_stream->premux_packet->unwritten_size <= es_size){
+ es_size -= pes_stream->premux_packet->unwritten_size;
+ pes_stream->premux_packet= pes_stream->premux_packet->next;
+ }
+
+ if(es_size)
+ pes_stream->premux_packet->unwritten_size -= es_size;
+
+ return payload_size - stuffing_size;
+}
+
+static int output_packet(AVFormatContext *ctx, int flush){
+ MpegTSWrite *s = ctx->priv_data;
+ AVStream *st;
+ PESStream *stream;
+ int es_size, trailer_size;
+ int result;
+ int best_i= -1;
+ int64_t pcr = s->last_pcr;
+ PacketDesc *timestamp_packet;
+
+ if((result = ff_pes_find_beststream(ctx, s->packet_size, flush, &pcr, &best_i)) <= 0)
+ return result;
+
+ s->last_pcr = pcr;
+ assert(best_i >= 0);
+
+ st = ctx->streams[best_i];
+ stream = st->priv_data;
+
+ assert(av_fifo_size(&stream->fifo) > 0);
+
+ timestamp_packet= stream->premux_packet;
+ if(timestamp_packet->unwritten_size == timestamp_packet->size){
+ trailer_size= 0;
+ }else{
+ trailer_size= timestamp_packet->unwritten_size;
+ timestamp_packet= timestamp_packet->next;
+ }
+
+ if(timestamp_packet){
+//av_log(ctx, AV_LOG_DEBUG, "dts:%f pts:%f pcr:%f stream:%d\n", timestamp_packet->dts/90000.0, timestamp_packet->pts/90000.0, pcr/90000.0, best_i);
+ es_size= flush_packet(ctx, best_i, timestamp_packet->pts, timestamp_packet->dts, pcr, trailer_size);
+ }else{
+ assert(av_fifo_size(&stream->fifo) == trailer_size);
+ es_size= flush_packet(ctx, best_i, AV_NOPTS_VALUE, AV_NOPTS_VALUE, pcr, trailer_size);
+ }
+
+
+ if(ff_pes_remove_decoded_packets(ctx, s->last_pcr) < 0)
+ return -1;
+
+ return 1;
+}
+
+
+static int mpegts_write_packet(AVFormatContext *ctx, AVPacket *pkt)
+{
+ int stream_index= pkt->stream_index;
+ int size = pkt->size;
+ static int total_size = 0;
+ AVStream *st = ctx->streams[stream_index];
+ MpegTSWriteStream *stream = st->priv_data;
+ PESStream *pes_stream = &stream->pes_stream;
+ int64_t pts;
+
+ /* add a preload value to avoid negative dts*/
+ pkt->pts += 10000;
+ pkt->dts += 10000;
+ total_size += size;
+ ff_pes_write_packet(ctx, pkt);
+ pts= pes_stream->predecode_packet->pts;
+
+ for(;;){
+ int ret = output_packet(ctx, 0);
+ if(ret<=0)
+ return ret;
+ }
+}
+
+static int mpegts_write_end(AVFormatContext *s)
+{
+ MpegTSWrite *ts = s->priv_data;
+ MpegTSService *service;
+ int i;
+
+ for(;;){
+ int ret= output_packet(s, 1);
+ if(ret<0)
+ return ret;
+ else if(ret==0)
+ break;
+ }
+
+ ff_pes_muxer_end(s);
+ for(i = 0; i < ts->nb_services; i++) {
+ service = ts->services[i];
+ av_freep(&service->provider_name);
+ av_freep(&service->name);
+ av_free(service);
+ }
+ av_free(ts->services);
+
+ return 0;
+}
+
+AVOutputFormat mpegts_muxer = {
+ "mpegts",
+ "MPEG2 transport stream format",
+ "video/x-mpegts",
+ "ts",
+ sizeof(MpegTSWrite),
+ CODEC_ID_MP2,
+ CODEC_ID_MPEG2VIDEO,
+ mpegts_write_header,
+ mpegts_write_packet,
+ mpegts_write_end,
+};
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