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author | Diego 'Flameeyes' Pettenò <flameeyes@gmail.com> | 2006-12-02 01:19:48 +0000 |
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committer | Diego 'Flameeyes' Pettenò <flameeyes@gmail.com> | 2006-12-02 01:19:48 +0000 |
commit | 0ea721f7ce81357bc4ec6eea609cd50482c3d15b (patch) | |
tree | 25a0871cb3c06f9716acf9c204192d548f214048 /contrib/ffmpeg/libavformat/mpegtsenc.c | |
parent | d8ec380876e7f697ba609546d61757ab3f2d8715 (diff) | |
download | xine-lib-0ea721f7ce81357bc4ec6eea609cd50482c3d15b.tar.gz xine-lib-0ea721f7ce81357bc4ec6eea609cd50482c3d15b.tar.bz2 |
Start working on a branch where FFmpeg is not copied, patched and carved to be built with automake but instead imported inline and built using its own build system. This is an import of a slightly modified FFmpeg current tree. xine-lib builds, install and run fine with it, but there are of course plenty of things that needs to be fixed before it can even be considered for a 1.2.x series. Work will continue in the next days of course.
CVS patchset: 8397
CVS date: 2006/12/02 01:19:48
Diffstat (limited to 'contrib/ffmpeg/libavformat/mpegtsenc.c')
-rw-r--r-- | contrib/ffmpeg/libavformat/mpegtsenc.c | 676 |
1 files changed, 676 insertions, 0 deletions
diff --git a/contrib/ffmpeg/libavformat/mpegtsenc.c b/contrib/ffmpeg/libavformat/mpegtsenc.c new file mode 100644 index 000000000..39868bea4 --- /dev/null +++ b/contrib/ffmpeg/libavformat/mpegtsenc.c @@ -0,0 +1,676 @@ +/* + * 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; + 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; + /* 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]); + } + } +} + +/* 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) +{ + 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; + 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; + } + } + if (pts != AV_NOPTS_VALUE) + header_len = 8; + else + header_len = 3; + if (private_code != 0) + header_len++; + len = payload_size + header_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; + if (pts != AV_NOPTS_VALUE) { + *q++ = 0x80; /* PTS only */ + *q++ = 0x05; /* header len */ + val = (0x02 << 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; + } else { + *q++ = 0x00; + *q++ = 0x00; + } + 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); + 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_index >= max_payload_size) { + mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_index, + ts_st->payload_pts); + ts_st->payload_pts = 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); + } + } + 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, +}; |