diff options
Diffstat (limited to 'contrib/ffmpeg/libavformat/mpegtsenc.c')
| -rw-r--r-- | contrib/ffmpeg/libavformat/mpegtsenc.c | 695 |
1 files changed, 0 insertions, 695 deletions
diff --git a/contrib/ffmpeg/libavformat/mpegtsenc.c b/contrib/ffmpeg/libavformat/mpegtsenc.c deleted file mode 100644 index c521b68b8..000000000 --- a/contrib/ffmpeg/libavformat/mpegtsenc.c +++ /dev/null @@ -1,695 +0,0 @@ -/* - * 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" - -/* 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 + 1) & 0xf; - *q++ = 0x10 | 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 - -typedef struct MpegTSWriteStream { - 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 { - 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; -} 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 i, total_bit_rate; - 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->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 */ - total_bit_rate = 0; - 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; - total_bit_rate += st->codec->bit_rate; - } - - /* 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 (total_bit_rate <= 8 * 1024) - total_bit_rate = 8 * 1024; - service->pcr_packet_freq = (total_bit_rate * PCR_RETRANS_TIME) / - (TS_PACKET_SIZE * 8 * 1000); - ts->sdt_packet_freq = (total_bit_rate * SDT_RETRANS_TIME) / - (TS_PACKET_SIZE * 8 * 1000); - ts->pat_packet_freq = (total_bit_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 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; -} - -/* NOTE: pes_data contains all the PES packet */ -static void mpegts_write_pes(AVFormatContext *s, AVStream *st, - const uint8_t *payload, int payload_size, - int64_t pts, int64_t dts) -{ - MpegTSWriteStream *ts_st = st->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 */ - - is_start = 1; - while (payload_size > 0) { - retransmit_si_info(s); - - 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) { - ts_st->service->pcr_packet_count = 0; - write_pcr = 1; - /* XXX: this is incorrect, but at least we have a PCR - value */ - pcr = pts; - } - } - - /* prepare packet header */ - q = buf; - *q++ = 0x47; - val = (ts_st->pid >> 8); - if (is_start) - val |= 0x40; - *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; - } - if (is_start) { - /* write PES header */ - *q++ = 0x00; - *q++ = 0x00; - *q++ = 0x01; - private_code = 0; - if (st->codec->codec_type == CODEC_TYPE_VIDEO) { - *q++ = 0xe0; - } else if (st->codec->codec_type == CODEC_TYPE_AUDIO && - (st->codec->codec_id == CODEC_ID_MP2 || - st->codec->codec_id == CODEC_ID_MP3)) { - *q++ = 0xc0; - } else { - *q++ = 0xbd; - if (st->codec->codec_type == CODEC_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) { - header_len += 5; - flags |= 0x40; - } - len = payload_size + header_len + 3; - if (private_code != 0) - len++; - *q++ = len >> 8; - *q++ = len; - val = 0x80; - /* data alignment indicator is required for subtitle data */ - if (st->codec->codec_type == CODEC_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) { - write_pts(q, 1, dts); - q += 5; - } - 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; - put_buffer(&s->pb, buf, TS_PACKET_SIZE); - } - put_flush_packet(&s->pb); -} - -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; - MpegTSWriteStream *ts_st = st->priv_data; - int len, max_payload_size; - - if (st->codec->codec_type == CODEC_TYPE_SUBTITLE) { - /* for subtitle, a single PES packet must be generated */ - mpegts_write_pes(s, st, buf, size, pkt->pts, AV_NOPTS_VALUE); - return 0; - } - - max_payload_size = DEFAULT_PES_PAYLOAD_SIZE; - while (size > 0) { - len = max_payload_size - ts_st->payload_index; - if (len > size) - len = size; - memcpy(ts_st->payload + ts_st->payload_index, buf, len); - buf += len; - size -= len; - ts_st->payload_index += len; - if (ts_st->payload_pts == AV_NOPTS_VALUE) - ts_st->payload_pts = pkt->pts; - if (ts_st->payload_dts == AV_NOPTS_VALUE) - ts_st->payload_dts = pkt->dts; - if (ts_st->payload_index >= max_payload_size) { - mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_index, - ts_st->payload_pts, ts_st->payload_dts); - ts_st->payload_pts = AV_NOPTS_VALUE; - ts_st->payload_dts = AV_NOPTS_VALUE; - ts_st->payload_index = 0; - } - } - 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_index > 0) { - mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_index, - ts_st->payload_pts, ts_st->payload_dts); - } - } - put_flush_packet(&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 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, -}; |