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https://github.com/FFmpeg/FFmpeg.git
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04b53746ad
* qatar/master: rtpdec: Use 4 byte startcodes for H.264 matroskadec: Mark variable as av_unused. Move some conditionally used variables into the block where they are used. Drop some completely unnecessary av_unused attributes. swscale: Remove unused variable alpMmxFilter. Drop unnecessary av_uninit attributes from some variable declarations. movenc: Support muxing wmapro in ismv/isma mpegtsenc: Add an AVOption for forcing a new PAT/PMT/SDT to be written swscale: move YUV2PACKED16WRAPPER() macro down to where it is used. swscale: handle gray16 as a "planar" YUV format (Y-only, of course). swscale: use yuv2packed1() functions for unscaled chroma also. swscale: fix incorrect chroma bias in yuv2rgb48_1_c(). swscale: fix invalid memory accesses in yuvpacked1() functions. Move PS2 MMI code below the mips subdirectory, where it belongs. mips: Move MMI function declarations to a header. build: Set correct dependencies for rtmp* protocols implemented by librtmp. Conflicts: libavcodec/ac3enc_template.c libavformat/mpegtsenc.c libswscale/output.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
1137 lines
37 KiB
C
1137 lines
37 KiB
C
/*
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* MPEG2 transport stream (aka DVB) muxer
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* Copyright (c) 2003 Fabrice Bellard
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/bswap.h"
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#include "libavutil/crc.h"
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#include "libavutil/dict.h"
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#include "libavutil/mathematics.h"
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#include "libavutil/opt.h"
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#include "libavutil/avassert.h"
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#include "libavcodec/mpegvideo.h"
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#include "avformat.h"
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#include "internal.h"
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#include "mpegts.h"
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#include "adts.h"
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#define PCR_TIME_BASE 27000000
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/* write DVB SI sections */
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/*********************************************/
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/* mpegts section writer */
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typedef struct MpegTSSection {
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int pid;
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int cc;
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void (*write_packet)(struct MpegTSSection *s, const uint8_t *packet);
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void *opaque;
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} MpegTSSection;
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typedef struct MpegTSService {
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MpegTSSection pmt; /* MPEG2 pmt table context */
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int sid; /* service ID */
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char *name;
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char *provider_name;
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int pcr_pid;
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int pcr_packet_count;
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int pcr_packet_period;
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} MpegTSService;
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typedef struct MpegTSWrite {
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const AVClass *av_class;
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MpegTSSection pat; /* MPEG2 pat table */
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MpegTSSection sdt; /* MPEG2 sdt table context */
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MpegTSService **services;
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int sdt_packet_count;
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int sdt_packet_period;
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int pat_packet_count;
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int pat_packet_period;
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int nb_services;
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int onid;
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int tsid;
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int64_t first_pcr;
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int mux_rate; ///< set to 1 when VBR
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int pes_payload_size;
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int transport_stream_id;
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int original_network_id;
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int service_id;
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int pmt_start_pid;
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int start_pid;
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int m2ts_mode;
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int reemit_pat_pmt;
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} MpegTSWrite;
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/* a PES packet header is generated every DEFAULT_PES_HEADER_FREQ packets */
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#define DEFAULT_PES_HEADER_FREQ 16
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#define DEFAULT_PES_PAYLOAD_SIZE ((DEFAULT_PES_HEADER_FREQ - 1) * 184 + 170)
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static const AVOption options[] = {
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{ "mpegts_transport_stream_id", "Set transport_stream_id field.",
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offsetof(MpegTSWrite, transport_stream_id), AV_OPT_TYPE_INT, {.dbl = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM},
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{ "mpegts_original_network_id", "Set original_network_id field.",
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offsetof(MpegTSWrite, original_network_id), AV_OPT_TYPE_INT, {.dbl = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM},
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{ "mpegts_service_id", "Set service_id field.",
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offsetof(MpegTSWrite, service_id), AV_OPT_TYPE_INT, {.dbl = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM},
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{ "mpegts_pmt_start_pid", "Set the first pid of the PMT.",
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offsetof(MpegTSWrite, pmt_start_pid), AV_OPT_TYPE_INT, {.dbl = 0x1000 }, 0x0010, 0x1f00, AV_OPT_FLAG_ENCODING_PARAM},
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{ "mpegts_start_pid", "Set the first pid.",
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offsetof(MpegTSWrite, start_pid), AV_OPT_TYPE_INT, {.dbl = 0x0100 }, 0x0100, 0x0f00, AV_OPT_FLAG_ENCODING_PARAM},
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{"mpegts_m2ts_mode", "Enable m2ts mode.",
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offsetof(MpegTSWrite, m2ts_mode), AV_OPT_TYPE_INT, {.dbl = -1 },
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-1,1, AV_OPT_FLAG_ENCODING_PARAM},
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{ "muxrate", NULL, offsetof(MpegTSWrite, mux_rate), AV_OPT_TYPE_INT, {1}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM},
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{ "pes_payload_size", "Minimum PES packet payload in bytes",
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offsetof(MpegTSWrite, pes_payload_size), AV_OPT_TYPE_INT, {DEFAULT_PES_PAYLOAD_SIZE}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM},
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{ "resend_headers", "Reemit PAT/PMT before writing the next packet",
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offsetof(MpegTSWrite, reemit_pat_pmt), AV_OPT_TYPE_INT, {0}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM},
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{ NULL },
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};
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static const AVClass mpegts_muxer_class = {
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.class_name = "MPEGTS muxer",
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.item_name = av_default_item_name,
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.option = options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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/* NOTE: 4 bytes must be left at the end for the crc32 */
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static void mpegts_write_section(MpegTSSection *s, uint8_t *buf, int len)
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{
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unsigned int crc;
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unsigned char packet[TS_PACKET_SIZE];
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const unsigned char *buf_ptr;
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unsigned char *q;
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int first, b, len1, left;
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crc = av_bswap32(av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, buf, len - 4));
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buf[len - 4] = (crc >> 24) & 0xff;
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buf[len - 3] = (crc >> 16) & 0xff;
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buf[len - 2] = (crc >> 8) & 0xff;
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buf[len - 1] = (crc) & 0xff;
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/* send each packet */
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buf_ptr = buf;
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while (len > 0) {
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first = (buf == buf_ptr);
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q = packet;
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*q++ = 0x47;
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b = (s->pid >> 8);
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if (first)
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b |= 0x40;
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*q++ = b;
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*q++ = s->pid;
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s->cc = (s->cc + 1) & 0xf;
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*q++ = 0x10 | s->cc;
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if (first)
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*q++ = 0; /* 0 offset */
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len1 = TS_PACKET_SIZE - (q - packet);
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if (len1 > len)
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len1 = len;
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memcpy(q, buf_ptr, len1);
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q += len1;
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/* add known padding data */
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left = TS_PACKET_SIZE - (q - packet);
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if (left > 0)
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memset(q, 0xff, left);
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s->write_packet(s, packet);
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buf_ptr += len1;
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len -= len1;
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}
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}
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static inline void put16(uint8_t **q_ptr, int val)
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{
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uint8_t *q;
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q = *q_ptr;
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*q++ = val >> 8;
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*q++ = val;
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*q_ptr = q;
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}
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static int mpegts_write_section1(MpegTSSection *s, int tid, int id,
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int version, int sec_num, int last_sec_num,
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uint8_t *buf, int len)
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{
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uint8_t section[1024], *q;
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unsigned int tot_len;
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/* reserved_future_use field must be set to 1 for SDT */
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unsigned int flags = tid == SDT_TID ? 0xf000 : 0xb000;
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tot_len = 3 + 5 + len + 4;
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/* check if not too big */
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if (tot_len > 1024)
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return AVERROR_INVALIDDATA;
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q = section;
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*q++ = tid;
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put16(&q, flags | (len + 5 + 4)); /* 5 byte header + 4 byte CRC */
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put16(&q, id);
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*q++ = 0xc1 | (version << 1); /* current_next_indicator = 1 */
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*q++ = sec_num;
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*q++ = last_sec_num;
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memcpy(q, buf, len);
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mpegts_write_section(s, section, tot_len);
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return 0;
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}
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/*********************************************/
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/* mpegts writer */
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#define DEFAULT_PROVIDER_NAME "FFmpeg"
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#define DEFAULT_SERVICE_NAME "Service01"
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/* we retransmit the SI info at this rate */
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#define SDT_RETRANS_TIME 500
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#define PAT_RETRANS_TIME 100
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#define PCR_RETRANS_TIME 20
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typedef struct MpegTSWriteStream {
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struct MpegTSService *service;
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int pid; /* stream associated pid */
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int cc;
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int payload_size;
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int first_pts_check; ///< first pts check needed
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int prev_payload_key;
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int64_t payload_pts;
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int64_t payload_dts;
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int payload_flags;
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uint8_t *payload;
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ADTSContext *adts;
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} MpegTSWriteStream;
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static void mpegts_write_pat(AVFormatContext *s)
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{
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MpegTSWrite *ts = s->priv_data;
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MpegTSService *service;
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uint8_t data[1012], *q;
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int i;
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q = data;
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for(i = 0; i < ts->nb_services; i++) {
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service = ts->services[i];
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put16(&q, service->sid);
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put16(&q, 0xe000 | service->pmt.pid);
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}
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mpegts_write_section1(&ts->pat, PAT_TID, ts->tsid, 0, 0, 0,
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data, q - data);
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}
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static void mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
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{
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// MpegTSWrite *ts = s->priv_data;
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uint8_t data[1012], *q, *desc_length_ptr, *program_info_length_ptr;
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int val, stream_type, i;
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q = data;
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put16(&q, 0xe000 | service->pcr_pid);
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program_info_length_ptr = q;
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q += 2; /* patched after */
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/* put program info here */
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val = 0xf000 | (q - program_info_length_ptr - 2);
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program_info_length_ptr[0] = val >> 8;
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program_info_length_ptr[1] = val;
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for(i = 0; i < s->nb_streams; i++) {
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AVStream *st = s->streams[i];
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MpegTSWriteStream *ts_st = st->priv_data;
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AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL,0);
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switch(st->codec->codec_id) {
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case CODEC_ID_MPEG1VIDEO:
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case CODEC_ID_MPEG2VIDEO:
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stream_type = STREAM_TYPE_VIDEO_MPEG2;
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break;
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case CODEC_ID_MPEG4:
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stream_type = STREAM_TYPE_VIDEO_MPEG4;
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break;
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case CODEC_ID_H264:
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stream_type = STREAM_TYPE_VIDEO_H264;
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break;
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case CODEC_ID_DIRAC:
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stream_type = STREAM_TYPE_VIDEO_DIRAC;
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break;
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case CODEC_ID_MP2:
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case CODEC_ID_MP3:
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stream_type = STREAM_TYPE_AUDIO_MPEG1;
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break;
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case CODEC_ID_AAC:
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stream_type = STREAM_TYPE_AUDIO_AAC;
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break;
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case CODEC_ID_AAC_LATM:
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stream_type = STREAM_TYPE_AUDIO_AAC_LATM;
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break;
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case CODEC_ID_AC3:
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stream_type = STREAM_TYPE_AUDIO_AC3;
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break;
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default:
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stream_type = STREAM_TYPE_PRIVATE_DATA;
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break;
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}
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*q++ = stream_type;
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put16(&q, 0xe000 | ts_st->pid);
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desc_length_ptr = q;
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q += 2; /* patched after */
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/* write optional descriptors here */
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switch(st->codec->codec_type) {
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case AVMEDIA_TYPE_AUDIO:
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if(st->codec->codec_id==CODEC_ID_EAC3){
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*q++=0x7a; // EAC3 descriptor see A038 DVB SI
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*q++=1; // 1 byte, all flags sets to 0
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*q++=0; // omit all fields...
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}
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if (lang) {
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char *p;
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char *next = lang->value;
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uint8_t *len_ptr;
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*q++ = 0x0a; /* ISO 639 language descriptor */
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len_ptr = q++;
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*len_ptr = 0;
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for (p = lang->value; next && *len_ptr < 255 / 4 * 4; p = next + 1) {
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next = strchr(p, ',');
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if (strlen(p) != 3 && (!next || next != p + 3))
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continue; /* not a 3-letter code */
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*q++ = *p++;
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*q++ = *p++;
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*q++ = *p++;
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if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
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*q++ = 0x01;
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else if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
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*q++ = 0x02;
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else if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
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*q++ = 0x03;
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else
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*q++ = 0; /* undefined type */
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*len_ptr += 4;
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}
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if (*len_ptr == 0)
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q -= 2; /* no language codes were written */
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}
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break;
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case AVMEDIA_TYPE_SUBTITLE:
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{
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const char *language;
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language = lang && strlen(lang->value)==3 ? lang->value : "eng";
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*q++ = 0x59;
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*q++ = 8;
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*q++ = language[0];
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*q++ = language[1];
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*q++ = language[2];
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*q++ = 0x10; /* normal subtitles (0x20 = if hearing pb) */
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if(st->codec->extradata_size == 4) {
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memcpy(q, st->codec->extradata, 4);
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q += 4;
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} else {
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put16(&q, 1); /* page id */
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put16(&q, 1); /* ancillary page id */
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}
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}
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break;
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case AVMEDIA_TYPE_VIDEO:
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if (stream_type == STREAM_TYPE_VIDEO_DIRAC) {
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*q++ = 0x05; /*MPEG-2 registration descriptor*/
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*q++ = 4;
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*q++ = 'd';
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*q++ = 'r';
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*q++ = 'a';
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*q++ = 'c';
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}
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break;
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}
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val = 0xf000 | (q - desc_length_ptr - 2);
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desc_length_ptr[0] = val >> 8;
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desc_length_ptr[1] = val;
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}
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mpegts_write_section1(&service->pmt, PMT_TID, service->sid, 0, 0, 0,
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data, q - data);
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}
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/* NOTE: str == NULL is accepted for an empty string */
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static void putstr8(uint8_t **q_ptr, const char *str)
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{
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uint8_t *q;
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int len;
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q = *q_ptr;
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if (!str)
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len = 0;
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else
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len = strlen(str);
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*q++ = len;
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memcpy(q, str, len);
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q += len;
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*q_ptr = q;
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}
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static void mpegts_write_sdt(AVFormatContext *s)
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{
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MpegTSWrite *ts = s->priv_data;
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MpegTSService *service;
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uint8_t data[1012], *q, *desc_list_len_ptr, *desc_len_ptr;
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int i, running_status, free_ca_mode, val;
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q = data;
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put16(&q, ts->onid);
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*q++ = 0xff;
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for(i = 0; i < ts->nb_services; i++) {
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service = ts->services[i];
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put16(&q, service->sid);
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*q++ = 0xfc | 0x00; /* currently no EIT info */
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desc_list_len_ptr = q;
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q += 2;
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running_status = 4; /* running */
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free_ca_mode = 0;
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/* write only one descriptor for the service name and provider */
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*q++ = 0x48;
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desc_len_ptr = q;
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q++;
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*q++ = 0x01; /* digital television service */
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putstr8(&q, service->provider_name);
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putstr8(&q, service->name);
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desc_len_ptr[0] = q - desc_len_ptr - 1;
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/* fill descriptor length */
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val = (running_status << 13) | (free_ca_mode << 12) |
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(q - desc_list_len_ptr - 2);
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desc_list_len_ptr[0] = val >> 8;
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desc_list_len_ptr[1] = val;
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}
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mpegts_write_section1(&ts->sdt, SDT_TID, ts->tsid, 0, 0, 0,
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data, q - data);
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}
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static MpegTSService *mpegts_add_service(MpegTSWrite *ts,
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int sid,
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const char *provider_name,
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const char *name)
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{
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MpegTSService *service;
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service = av_mallocz(sizeof(MpegTSService));
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if (!service)
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return NULL;
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service->pmt.pid = ts->pmt_start_pid + ts->nb_services;
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service->sid = sid;
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service->provider_name = av_strdup(provider_name);
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service->name = av_strdup(name);
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service->pcr_pid = 0x1fff;
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dynarray_add(&ts->services, &ts->nb_services, service);
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return service;
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}
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|
|
static int64_t get_pcr(const MpegTSWrite *ts, AVIOContext *pb)
|
|
{
|
|
return av_rescale(avio_tell(pb) + 11, 8 * PCR_TIME_BASE, ts->mux_rate) +
|
|
ts->first_pcr;
|
|
}
|
|
|
|
static void mpegts_prefix_m2ts_header(AVFormatContext *s)
|
|
{
|
|
MpegTSWrite *ts = s->priv_data;
|
|
if (ts->m2ts_mode) {
|
|
int64_t pcr = get_pcr(s->priv_data, s->pb);
|
|
uint32_t tp_extra_header = pcr % 0x3fffffff;
|
|
tp_extra_header = AV_RB32(&tp_extra_header);
|
|
avio_write(s->pb, (unsigned char *) &tp_extra_header,
|
|
sizeof(tp_extra_header));
|
|
}
|
|
}
|
|
|
|
static void section_write_packet(MpegTSSection *s, const uint8_t *packet)
|
|
{
|
|
AVFormatContext *ctx = s->opaque;
|
|
mpegts_prefix_m2ts_header(ctx);
|
|
avio_write(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, *pcr_st = NULL;
|
|
AVDictionaryEntry *title, *provider;
|
|
int i, j;
|
|
const char *service_name;
|
|
const char *provider_name;
|
|
int *pids;
|
|
|
|
// round up to a whole number of TS packets
|
|
ts->pes_payload_size = (ts->pes_payload_size + 14 + 183) / 184 * 184 - 14;
|
|
|
|
ts->tsid = ts->transport_stream_id;
|
|
ts->onid = ts->original_network_id;
|
|
/* allocate a single DVB service */
|
|
title = av_dict_get(s->metadata, "service_name", NULL, 0);
|
|
if (!title)
|
|
title = av_dict_get(s->metadata, "title", NULL, 0);
|
|
service_name = title ? title->value : DEFAULT_SERVICE_NAME;
|
|
provider = av_dict_get(s->metadata, "service_provider", NULL, 0);
|
|
provider_name = provider ? provider->value : DEFAULT_PROVIDER_NAME;
|
|
service = mpegts_add_service(ts, ts->service_id, provider_name, service_name);
|
|
service->pmt.write_packet = section_write_packet;
|
|
service->pmt.opaque = s;
|
|
service->pmt.cc = 15;
|
|
|
|
ts->pat.pid = PAT_PID;
|
|
ts->pat.cc = 15; // Initialize at 15 so that it wraps and be equal to 0 for the first packet we write
|
|
ts->pat.write_packet = section_write_packet;
|
|
ts->pat.opaque = s;
|
|
|
|
ts->sdt.pid = SDT_PID;
|
|
ts->sdt.cc = 15;
|
|
ts->sdt.write_packet = section_write_packet;
|
|
ts->sdt.opaque = s;
|
|
|
|
pids = av_malloc(s->nb_streams * sizeof(*pids));
|
|
if (!pids)
|
|
return AVERROR(ENOMEM);
|
|
|
|
/* assign pids to each stream */
|
|
for(i = 0;i < s->nb_streams; i++) {
|
|
st = s->streams[i];
|
|
avpriv_set_pts_info(st, 33, 1, 90000);
|
|
ts_st = av_mallocz(sizeof(MpegTSWriteStream));
|
|
if (!ts_st)
|
|
goto fail;
|
|
st->priv_data = ts_st;
|
|
ts_st->payload = av_mallocz(ts->pes_payload_size);
|
|
if (!ts_st->payload)
|
|
goto fail;
|
|
ts_st->service = service;
|
|
/* MPEG pid values < 16 are reserved. Applications which set st->id in
|
|
* this range are assigned a calculated pid. */
|
|
if (st->id < 16) {
|
|
ts_st->pid = ts->start_pid + i;
|
|
} else if (st->id < 0x1FFF) {
|
|
ts_st->pid = st->id;
|
|
} else {
|
|
av_log(s, AV_LOG_ERROR, "Invalid stream id %d, must be less than 8191\n", st->id);
|
|
goto fail;
|
|
}
|
|
if (ts_st->pid == service->pmt.pid) {
|
|
av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
|
|
goto fail;
|
|
}
|
|
for (j = 0; j < i; j++)
|
|
if (pids[j] == ts_st->pid) {
|
|
av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
|
|
goto fail;
|
|
}
|
|
pids[i] = ts_st->pid;
|
|
ts_st->payload_pts = AV_NOPTS_VALUE;
|
|
ts_st->payload_dts = AV_NOPTS_VALUE;
|
|
ts_st->first_pts_check = 1;
|
|
ts_st->cc = 15;
|
|
/* update PCR pid by using the first video stream */
|
|
if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
|
|
service->pcr_pid == 0x1fff) {
|
|
service->pcr_pid = ts_st->pid;
|
|
pcr_st = st;
|
|
}
|
|
if (st->codec->codec_id == CODEC_ID_AAC &&
|
|
st->codec->extradata_size > 0) {
|
|
ts_st->adts = av_mallocz(sizeof(*ts_st->adts));
|
|
if (!ts_st->adts)
|
|
goto fail;
|
|
if (ff_adts_decode_extradata(s, ts_st->adts, st->codec->extradata,
|
|
st->codec->extradata_size) < 0)
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
av_free(pids);
|
|
|
|
/* if no video stream, use the first stream as PCR */
|
|
if (service->pcr_pid == 0x1fff && s->nb_streams > 0) {
|
|
pcr_st = s->streams[0];
|
|
ts_st = pcr_st->priv_data;
|
|
service->pcr_pid = ts_st->pid;
|
|
}
|
|
|
|
if (ts->mux_rate > 1) {
|
|
service->pcr_packet_period = (ts->mux_rate * PCR_RETRANS_TIME) /
|
|
(TS_PACKET_SIZE * 8 * 1000);
|
|
ts->sdt_packet_period = (ts->mux_rate * SDT_RETRANS_TIME) /
|
|
(TS_PACKET_SIZE * 8 * 1000);
|
|
ts->pat_packet_period = (ts->mux_rate * PAT_RETRANS_TIME) /
|
|
(TS_PACKET_SIZE * 8 * 1000);
|
|
|
|
ts->first_pcr = av_rescale(s->max_delay, PCR_TIME_BASE, AV_TIME_BASE);
|
|
} else {
|
|
/* Arbitrary values, PAT/PMT will also be written on video key frames */
|
|
ts->sdt_packet_period = 200;
|
|
ts->pat_packet_period = 40;
|
|
if (pcr_st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
|
|
if (!pcr_st->codec->frame_size) {
|
|
av_log(s, AV_LOG_WARNING, "frame size not set\n");
|
|
service->pcr_packet_period =
|
|
pcr_st->codec->sample_rate/(10*512);
|
|
} else {
|
|
service->pcr_packet_period =
|
|
pcr_st->codec->sample_rate/(10*pcr_st->codec->frame_size);
|
|
}
|
|
} else {
|
|
// max delta PCR 0.1s
|
|
service->pcr_packet_period =
|
|
pcr_st->codec->time_base.den/(10*pcr_st->codec->time_base.num);
|
|
}
|
|
}
|
|
|
|
// output a PCR as soon as possible
|
|
service->pcr_packet_count = service->pcr_packet_period;
|
|
ts->pat_packet_count = ts->pat_packet_period-1;
|
|
ts->sdt_packet_count = ts->sdt_packet_period-1;
|
|
|
|
if (ts->mux_rate == 1)
|
|
av_log(s, AV_LOG_INFO, "muxrate VBR, ");
|
|
else
|
|
av_log(s, AV_LOG_INFO, "muxrate %d, ", ts->mux_rate);
|
|
av_log(s, AV_LOG_INFO, "pcr every %d pkts, "
|
|
"sdt every %d, pat/pmt every %d pkts\n",
|
|
service->pcr_packet_period,
|
|
ts->sdt_packet_period, ts->pat_packet_period);
|
|
|
|
if (ts->m2ts_mode == -1) {
|
|
if (av_match_ext(s->filename, "m2ts")) {
|
|
ts->m2ts_mode = 1;
|
|
} else {
|
|
ts->m2ts_mode = 0;
|
|
}
|
|
}
|
|
|
|
avio_flush(s->pb);
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
av_free(pids);
|
|
for(i = 0;i < s->nb_streams; i++) {
|
|
MpegTSWriteStream *ts_st;
|
|
st = s->streams[i];
|
|
ts_st = st->priv_data;
|
|
if (ts_st) {
|
|
av_freep(&ts_st->payload);
|
|
av_freep(&ts_st->adts);
|
|
}
|
|
av_freep(&st->priv_data);
|
|
}
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
/* send SDT, PAT and PMT tables regulary */
|
|
static void retransmit_si_info(AVFormatContext *s, int force_pat)
|
|
{
|
|
MpegTSWrite *ts = s->priv_data;
|
|
int i;
|
|
|
|
if (++ts->sdt_packet_count == ts->sdt_packet_period) {
|
|
ts->sdt_packet_count = 0;
|
|
mpegts_write_sdt(s);
|
|
}
|
|
if (++ts->pat_packet_count == ts->pat_packet_period || force_pat) {
|
|
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 int write_pcr_bits(uint8_t *buf, int64_t pcr)
|
|
{
|
|
int64_t pcr_low = pcr % 300, pcr_high = pcr / 300;
|
|
|
|
*buf++ = pcr_high >> 25;
|
|
*buf++ = pcr_high >> 17;
|
|
*buf++ = pcr_high >> 9;
|
|
*buf++ = pcr_high >> 1;
|
|
*buf++ = pcr_high << 7 | pcr_low >> 8 | 0x7e;
|
|
*buf++ = pcr_low;
|
|
|
|
return 6;
|
|
}
|
|
|
|
/* Write a single null transport stream packet */
|
|
static void mpegts_insert_null_packet(AVFormatContext *s)
|
|
{
|
|
uint8_t *q;
|
|
uint8_t buf[TS_PACKET_SIZE];
|
|
|
|
q = buf;
|
|
*q++ = 0x47;
|
|
*q++ = 0x00 | 0x1f;
|
|
*q++ = 0xff;
|
|
*q++ = 0x10;
|
|
memset(q, 0x0FF, TS_PACKET_SIZE - (q - buf));
|
|
mpegts_prefix_m2ts_header(s);
|
|
avio_write(s->pb, buf, TS_PACKET_SIZE);
|
|
}
|
|
|
|
/* Write a single transport stream packet with a PCR and no payload */
|
|
static void mpegts_insert_pcr_only(AVFormatContext *s, AVStream *st)
|
|
{
|
|
MpegTSWrite *ts = s->priv_data;
|
|
MpegTSWriteStream *ts_st = st->priv_data;
|
|
uint8_t *q;
|
|
uint8_t buf[TS_PACKET_SIZE];
|
|
|
|
q = buf;
|
|
*q++ = 0x47;
|
|
*q++ = ts_st->pid >> 8;
|
|
*q++ = ts_st->pid;
|
|
*q++ = 0x20 | ts_st->cc; /* Adaptation only */
|
|
/* Continuity Count field does not increment (see 13818-1 section 2.4.3.3) */
|
|
*q++ = TS_PACKET_SIZE - 5; /* Adaptation Field Length */
|
|
*q++ = 0x10; /* Adaptation flags: PCR present */
|
|
|
|
/* PCR coded into 6 bytes */
|
|
q += write_pcr_bits(q, get_pcr(ts, s->pb));
|
|
|
|
/* stuffing bytes */
|
|
memset(q, 0xFF, TS_PACKET_SIZE - (q - buf));
|
|
mpegts_prefix_m2ts_header(s);
|
|
avio_write(s->pb, buf, TS_PACKET_SIZE);
|
|
}
|
|
|
|
static void write_pts(uint8_t *q, int fourbits, int64_t pts)
|
|
{
|
|
int val;
|
|
|
|
val = fourbits << 4 | (((pts >> 30) & 0x07) << 1) | 1;
|
|
*q++ = val;
|
|
val = (((pts >> 15) & 0x7fff) << 1) | 1;
|
|
*q++ = val >> 8;
|
|
*q++ = val;
|
|
val = (((pts) & 0x7fff) << 1) | 1;
|
|
*q++ = val >> 8;
|
|
*q++ = val;
|
|
}
|
|
|
|
/* Set an adaptation field flag in an MPEG-TS packet*/
|
|
static void set_af_flag(uint8_t *pkt, int flag)
|
|
{
|
|
// expect at least one flag to set
|
|
assert(flag);
|
|
|
|
if ((pkt[3] & 0x20) == 0) {
|
|
// no AF yet, set adaptation field flag
|
|
pkt[3] |= 0x20;
|
|
// 1 byte length, no flags
|
|
pkt[4] = 1;
|
|
pkt[5] = 0;
|
|
}
|
|
pkt[5] |= flag;
|
|
}
|
|
|
|
/* Extend the adaptation field by size bytes */
|
|
static void extend_af(uint8_t *pkt, int size)
|
|
{
|
|
// expect already existing adaptation field
|
|
assert(pkt[3] & 0x20);
|
|
pkt[4] += size;
|
|
}
|
|
|
|
/* Get a pointer to MPEG-TS payload (right after TS packet header) */
|
|
static uint8_t *get_ts_payload_start(uint8_t *pkt)
|
|
{
|
|
if (pkt[3] & 0x20)
|
|
return pkt + 5 + pkt[4];
|
|
else
|
|
return pkt + 4;
|
|
}
|
|
|
|
/* Add a pes header to the front of payload, and segment into an integer number of
|
|
* ts packets. The final ts packet is padded using an over-sized adaptation header
|
|
* to exactly fill the last ts packet.
|
|
* NOTE: 'payload' contains a complete PES payload.
|
|
*/
|
|
static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
|
|
const uint8_t *payload, int payload_size,
|
|
int64_t pts, int64_t dts, int key)
|
|
{
|
|
MpegTSWriteStream *ts_st = st->priv_data;
|
|
MpegTSWrite *ts = s->priv_data;
|
|
uint8_t buf[TS_PACKET_SIZE];
|
|
uint8_t *q;
|
|
int val, is_start, len, header_len, write_pcr, private_code, flags;
|
|
int afc_len, stuffing_len;
|
|
int64_t pcr = -1; /* avoid warning */
|
|
int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE);
|
|
int force_pat = st->codec->codec_type == AVMEDIA_TYPE_VIDEO && key && !ts_st->prev_payload_key;
|
|
|
|
is_start = 1;
|
|
while (payload_size > 0) {
|
|
retransmit_si_info(s, force_pat);
|
|
force_pat = 0;
|
|
|
|
write_pcr = 0;
|
|
if (ts_st->pid == ts_st->service->pcr_pid) {
|
|
if (ts->mux_rate > 1 || is_start) // VBR pcr period is based on frames
|
|
ts_st->service->pcr_packet_count++;
|
|
if (ts_st->service->pcr_packet_count >=
|
|
ts_st->service->pcr_packet_period) {
|
|
ts_st->service->pcr_packet_count = 0;
|
|
write_pcr = 1;
|
|
}
|
|
}
|
|
|
|
if (ts->mux_rate > 1 && dts != AV_NOPTS_VALUE &&
|
|
(dts - get_pcr(ts, s->pb)/300) > delay) {
|
|
/* pcr insert gets priority over null packet insert */
|
|
if (write_pcr)
|
|
mpegts_insert_pcr_only(s, st);
|
|
else
|
|
mpegts_insert_null_packet(s);
|
|
continue; /* recalculate write_pcr and possibly retransmit si_info */
|
|
}
|
|
|
|
/* prepare packet header */
|
|
q = buf;
|
|
*q++ = 0x47;
|
|
val = (ts_st->pid >> 8);
|
|
if (is_start)
|
|
val |= 0x40;
|
|
*q++ = val;
|
|
*q++ = ts_st->pid;
|
|
ts_st->cc = (ts_st->cc + 1) & 0xf;
|
|
*q++ = 0x10 | ts_st->cc; // payload indicator + CC
|
|
if (key && is_start && pts != AV_NOPTS_VALUE) {
|
|
// set Random Access for key frames
|
|
if (ts_st->pid == ts_st->service->pcr_pid)
|
|
write_pcr = 1;
|
|
set_af_flag(buf, 0x40);
|
|
q = get_ts_payload_start(buf);
|
|
}
|
|
if (write_pcr) {
|
|
set_af_flag(buf, 0x10);
|
|
q = get_ts_payload_start(buf);
|
|
// add 11, pcr references the last byte of program clock reference base
|
|
if (ts->mux_rate > 1)
|
|
pcr = get_pcr(ts, s->pb);
|
|
else
|
|
pcr = (dts - delay)*300;
|
|
if (dts != AV_NOPTS_VALUE && dts < pcr / 300)
|
|
av_log(s, AV_LOG_WARNING, "dts < pcr, TS is invalid\n");
|
|
extend_af(buf, write_pcr_bits(q, pcr));
|
|
q = get_ts_payload_start(buf);
|
|
}
|
|
if (is_start) {
|
|
int pes_extension = 0;
|
|
/* write PES header */
|
|
*q++ = 0x00;
|
|
*q++ = 0x00;
|
|
*q++ = 0x01;
|
|
private_code = 0;
|
|
if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
|
|
if (st->codec->codec_id == CODEC_ID_DIRAC) {
|
|
*q++ = 0xfd;
|
|
} else
|
|
*q++ = 0xe0;
|
|
} else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
|
|
(st->codec->codec_id == CODEC_ID_MP2 ||
|
|
st->codec->codec_id == CODEC_ID_MP3 ||
|
|
st->codec->codec_id == CODEC_ID_AAC)) {
|
|
*q++ = 0xc0;
|
|
} else {
|
|
*q++ = 0xbd;
|
|
if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
|
|
private_code = 0x20;
|
|
}
|
|
}
|
|
header_len = 0;
|
|
flags = 0;
|
|
if (pts != AV_NOPTS_VALUE) {
|
|
header_len += 5;
|
|
flags |= 0x80;
|
|
}
|
|
if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
|
|
header_len += 5;
|
|
flags |= 0x40;
|
|
}
|
|
if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
|
|
st->codec->codec_id == CODEC_ID_DIRAC) {
|
|
/* set PES_extension_flag */
|
|
pes_extension = 1;
|
|
flags |= 0x01;
|
|
|
|
/*
|
|
* One byte for PES2 extension flag +
|
|
* one byte for extension length +
|
|
* one byte for extension id
|
|
*/
|
|
header_len += 3;
|
|
}
|
|
len = payload_size + header_len + 3;
|
|
if (private_code != 0)
|
|
len++;
|
|
if (len > 0xffff)
|
|
len = 0;
|
|
*q++ = len >> 8;
|
|
*q++ = len;
|
|
val = 0x80;
|
|
/* data alignment indicator is required for subtitle data */
|
|
if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE)
|
|
val |= 0x04;
|
|
*q++ = val;
|
|
*q++ = flags;
|
|
*q++ = header_len;
|
|
if (pts != AV_NOPTS_VALUE) {
|
|
write_pts(q, flags >> 6, pts);
|
|
q += 5;
|
|
}
|
|
if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
|
|
write_pts(q, 1, dts);
|
|
q += 5;
|
|
}
|
|
if (pes_extension && st->codec->codec_id == CODEC_ID_DIRAC) {
|
|
flags = 0x01; /* set PES_extension_flag_2 */
|
|
*q++ = flags;
|
|
*q++ = 0x80 | 0x01; /* marker bit + extension length */
|
|
/*
|
|
* Set the stream id extension flag bit to 0 and
|
|
* write the extended stream id
|
|
*/
|
|
*q++ = 0x00 | 0x60;
|
|
}
|
|
if (private_code != 0)
|
|
*q++ = private_code;
|
|
is_start = 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, len);
|
|
payload += len;
|
|
payload_size -= len;
|
|
mpegts_prefix_m2ts_header(s);
|
|
avio_write(s->pb, buf, TS_PACKET_SIZE);
|
|
}
|
|
avio_flush(s->pb);
|
|
ts_st->prev_payload_key = key;
|
|
}
|
|
|
|
static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
AVStream *st = s->streams[pkt->stream_index];
|
|
int size = pkt->size;
|
|
uint8_t *buf= pkt->data;
|
|
uint8_t *data= NULL;
|
|
MpegTSWrite *ts = s->priv_data;
|
|
MpegTSWriteStream *ts_st = st->priv_data;
|
|
const uint64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE)*2;
|
|
int64_t dts = AV_NOPTS_VALUE, pts = AV_NOPTS_VALUE;
|
|
|
|
if (ts->reemit_pat_pmt) {
|
|
ts->pat_packet_count = ts->pat_packet_period - 1;
|
|
ts->sdt_packet_count = ts->sdt_packet_period - 1;
|
|
ts->reemit_pat_pmt = 0;
|
|
}
|
|
|
|
if (pkt->pts != AV_NOPTS_VALUE)
|
|
pts = pkt->pts + delay;
|
|
if (pkt->dts != AV_NOPTS_VALUE)
|
|
dts = pkt->dts + delay;
|
|
|
|
if (ts_st->first_pts_check && pts == AV_NOPTS_VALUE) {
|
|
av_log(s, AV_LOG_ERROR, "first pts value must set\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
ts_st->first_pts_check = 0;
|
|
|
|
if (st->codec->codec_id == CODEC_ID_H264) {
|
|
const uint8_t *p = buf, *buf_end = p+size;
|
|
uint32_t state = -1;
|
|
|
|
if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001) {
|
|
av_log(s, AV_LOG_ERROR, "H.264 bitstream malformed, "
|
|
"no startcode found, use the h264_mp4toannexb bitstream filter (-bsf h264_mp4toannexb)\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
do {
|
|
p = avpriv_mpv_find_start_code(p, buf_end, &state);
|
|
//av_log(s, AV_LOG_INFO, "nal %d\n", state & 0x1f);
|
|
} while (p < buf_end && (state & 0x1f) != 9 &&
|
|
(state & 0x1f) != 5 && (state & 0x1f) != 1);
|
|
|
|
if ((state & 0x1f) != 9) { // AUD NAL
|
|
data = av_malloc(pkt->size+6);
|
|
if (!data)
|
|
return AVERROR(ENOMEM);
|
|
memcpy(data+6, pkt->data, pkt->size);
|
|
AV_WB32(data, 0x00000001);
|
|
data[4] = 0x09;
|
|
data[5] = 0xf0; // any slice type (0xe) + rbsp stop one bit
|
|
buf = data;
|
|
size = pkt->size+6;
|
|
}
|
|
} else if (st->codec->codec_id == CODEC_ID_AAC) {
|
|
if (pkt->size < 2)
|
|
return AVERROR_INVALIDDATA;
|
|
if ((AV_RB16(pkt->data) & 0xfff0) != 0xfff0) {
|
|
ADTSContext *adts = ts_st->adts;
|
|
int new_size, err;
|
|
if (!adts) {
|
|
av_log(s, AV_LOG_ERROR, "AAC bitstream not in ADTS format "
|
|
"and extradata missing\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
new_size = ADTS_HEADER_SIZE+adts->pce_size+pkt->size;
|
|
if ((unsigned)new_size >= INT_MAX)
|
|
return AVERROR_INVALIDDATA;
|
|
data = av_malloc(new_size);
|
|
if (!data)
|
|
return AVERROR(ENOMEM);
|
|
err = ff_adts_write_frame_header(adts, data, pkt->size,
|
|
adts->pce_size);
|
|
if (err < 0) {
|
|
av_free(data);
|
|
return err;
|
|
}
|
|
if (adts->pce_size) {
|
|
memcpy(data+ADTS_HEADER_SIZE, adts->pce_data, adts->pce_size);
|
|
adts->pce_size = 0;
|
|
}
|
|
memcpy(data+ADTS_HEADER_SIZE+adts->pce_size, pkt->data, pkt->size);
|
|
buf = data;
|
|
size = new_size;
|
|
}
|
|
}
|
|
|
|
if (ts_st->payload_size && ts_st->payload_size + size > ts->pes_payload_size) {
|
|
mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
|
|
ts_st->payload_pts, ts_st->payload_dts,
|
|
ts_st->payload_flags & AV_PKT_FLAG_KEY);
|
|
ts_st->payload_size = 0;
|
|
}
|
|
|
|
if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO || size > ts->pes_payload_size) {
|
|
av_assert0(!ts_st->payload_size);
|
|
// for video and subtitle, write a single pes packet
|
|
mpegts_write_pes(s, st, buf, size, pts, dts, pkt->flags & AV_PKT_FLAG_KEY);
|
|
av_free(data);
|
|
return 0;
|
|
}
|
|
|
|
if (!ts_st->payload_size) {
|
|
ts_st->payload_pts = pts;
|
|
ts_st->payload_dts = dts;
|
|
ts_st->payload_flags = pkt->flags;
|
|
}
|
|
|
|
memcpy(ts_st->payload + ts_st->payload_size, buf, size);
|
|
ts_st->payload_size += size;
|
|
|
|
av_free(data);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mpegts_write_end(AVFormatContext *s)
|
|
{
|
|
MpegTSWrite *ts = s->priv_data;
|
|
MpegTSWriteStream *ts_st;
|
|
MpegTSService *service;
|
|
AVStream *st;
|
|
int i;
|
|
|
|
/* flush current packets */
|
|
for(i = 0; i < s->nb_streams; i++) {
|
|
st = s->streams[i];
|
|
ts_st = st->priv_data;
|
|
if (ts_st->payload_size > 0) {
|
|
mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
|
|
ts_st->payload_pts, ts_st->payload_dts,
|
|
ts_st->payload_flags & AV_PKT_FLAG_KEY);
|
|
}
|
|
av_freep(&ts_st->payload);
|
|
av_freep(&ts_st->adts);
|
|
}
|
|
avio_flush(s->pb);
|
|
|
|
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 ff_mpegts_muxer = {
|
|
.name = "mpegts",
|
|
.long_name = NULL_IF_CONFIG_SMALL("MPEG-2 transport stream format"),
|
|
.mime_type = "video/x-mpegts",
|
|
.extensions = "ts,m2t,m2ts,mts",
|
|
.priv_data_size = sizeof(MpegTSWrite),
|
|
.audio_codec = CODEC_ID_MP2,
|
|
.video_codec = CODEC_ID_MPEG2VIDEO,
|
|
.write_header = mpegts_write_header,
|
|
.write_packet = mpegts_write_packet,
|
|
.write_trailer = mpegts_write_end,
|
|
.priv_class = &mpegts_muxer_class,
|
|
};
|