X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;ds=inline;f=synfig-core%2Ftags%2Fsynfig_0_61_05%2Fsynfig-core%2Fsrc%2Fmodules%2Fmod_libavcodec%2Flibavformat%2Fmpegts.c;fp=synfig-core%2Ftags%2Fsynfig_0_61_05%2Fsynfig-core%2Fsrc%2Fmodules%2Fmod_libavcodec%2Flibavformat%2Fmpegts.c;h=0000000000000000000000000000000000000000;hb=6fa8f2f38d4b0b35f8539bf94e27ae27015c7689;hp=2fd8bf89653eb6c5525f910e879a983ae94ea9fe;hpb=47fce282611fbba1044921d22ca887f9b53ad91a;p=synfig.git diff --git a/synfig-core/tags/synfig_0_61_05/synfig-core/src/modules/mod_libavcodec/libavformat/mpegts.c b/synfig-core/tags/synfig_0_61_05/synfig-core/src/modules/mod_libavcodec/libavformat/mpegts.c deleted file mode 100644 index 2fd8bf8..0000000 --- a/synfig-core/tags/synfig_0_61_05/synfig-core/src/modules/mod_libavcodec/libavformat/mpegts.c +++ /dev/null @@ -1,1052 +0,0 @@ -/* - * MPEG2 transport stream (aka DVB) demux - * Copyright (c) 2002-2003 Fabrice Bellard. - * - * This library 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 of the License, or (at your option) any later version. - * - * This library 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 this library; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ -#include "avformat.h" - -#include "mpegts.h" - -//#define DEBUG_SI - -/* 1.0 second at 24Mbit/s */ -#define MAX_SCAN_PACKETS 32000 - -/* maximum size in which we look for synchronisation if - synchronisation is lost */ -#define MAX_RESYNC_SIZE 4096 - -static int add_pes_stream(AVFormatContext *s, int pid); - -enum MpegTSFilterType { - MPEGTS_PES, - MPEGTS_SECTION, -}; - -typedef void PESCallback(void *opaque, const uint8_t *buf, int len, int is_start); - -typedef struct MpegTSPESFilter { - PESCallback *pes_cb; - void *opaque; -} MpegTSPESFilter; - -typedef void SectionCallback(void *opaque, const uint8_t *buf, int len); - -typedef void SetServiceCallback(void *opaque, int ret); - -typedef struct MpegTSSectionFilter { - int section_index; - int section_h_size; - uint8_t *section_buf; - int check_crc:1; - int end_of_section_reached:1; - SectionCallback *section_cb; - void *opaque; -} MpegTSSectionFilter; - -typedef struct MpegTSFilter { - int pid; - int last_cc; /* last cc code (-1 if first packet) */ - enum MpegTSFilterType type; - union { - MpegTSPESFilter pes_filter; - MpegTSSectionFilter section_filter; - } u; -} MpegTSFilter; - -typedef struct MpegTSService { - int running:1; - int sid; - char *provider_name; - char *name; -} MpegTSService; - -typedef struct MpegTSContext { - /* user data */ - AVFormatContext *stream; - int raw_packet_size; /* raw packet size, including FEC if present */ - int auto_guess; /* if true, all pids are analized to find streams */ - int set_service_ret; - - /* data needed to handle file based ts */ - int stop_parse; /* stop parsing loop */ - AVPacket *pkt; /* packet containing av data */ - - /******************************************/ - /* private mpegts data */ - /* scan context */ - MpegTSFilter *sdt_filter; - int nb_services; - MpegTSService **services; - - /* set service context (XXX: allocated it ?) */ - SetServiceCallback *set_service_cb; - void *set_service_opaque; - MpegTSFilter *pat_filter; - MpegTSFilter *pmt_filter; - int req_sid; - - MpegTSFilter *pids[NB_PID_MAX]; -} MpegTSContext; - -static void write_section_data(AVFormatContext *s, MpegTSFilter *tss1, - const uint8_t *buf, int buf_size, int is_start) -{ - MpegTSSectionFilter *tss = &tss1->u.section_filter; - int len; - unsigned int crc; - - if (is_start) { - memcpy(tss->section_buf, buf, buf_size); - tss->section_index = buf_size; - tss->section_h_size = -1; - tss->end_of_section_reached = 0; - } else { - if (tss->end_of_section_reached) - return; - len = 4096 - tss->section_index; - if (buf_size < len) - len = buf_size; - memcpy(tss->section_buf + tss->section_index, buf, len); - tss->section_index += len; - } - - /* compute section length if possible */ - if (tss->section_h_size == -1 && tss->section_index >= 3) { - len = (((tss->section_buf[1] & 0xf) << 8) | tss->section_buf[2]) + 3; - if (len > 4096) - return; - tss->section_h_size = len; - } - - if (tss->section_h_size != -1 && tss->section_index >= tss->section_h_size) { - if (tss->check_crc) { - crc = mpegts_crc32(tss->section_buf, tss->section_h_size); - if (crc != 0) - goto invalid_crc; - } - tss->section_cb(tss->opaque, tss->section_buf, tss->section_h_size); - invalid_crc: - tss->end_of_section_reached = 1; - } -} - -MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts, unsigned int pid, - SectionCallback *section_cb, void *opaque, - int check_crc) - -{ - MpegTSFilter *filter; - MpegTSSectionFilter *sec; - - if (pid >= NB_PID_MAX || ts->pids[pid]) - return NULL; - filter = av_mallocz(sizeof(MpegTSFilter)); - if (!filter) - return NULL; - ts->pids[pid] = filter; - filter->type = MPEGTS_SECTION; - filter->pid = pid; - filter->last_cc = -1; - sec = &filter->u.section_filter; - sec->section_cb = section_cb; - sec->opaque = opaque; - sec->section_buf = av_malloc(MAX_SECTION_SIZE); - sec->check_crc = check_crc; - if (!sec->section_buf) { - av_free(filter); - return NULL; - } - return filter; -} - -MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid, - PESCallback *pes_cb, - void *opaque) -{ - MpegTSFilter *filter; - MpegTSPESFilter *pes; - - if (pid >= NB_PID_MAX || ts->pids[pid]) - return NULL; - filter = av_mallocz(sizeof(MpegTSFilter)); - if (!filter) - return NULL; - ts->pids[pid] = filter; - filter->type = MPEGTS_PES; - filter->pid = pid; - filter->last_cc = -1; - pes = &filter->u.pes_filter; - pes->pes_cb = pes_cb; - pes->opaque = opaque; - return filter; -} - -void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter) -{ - int pid; - - pid = filter->pid; - if (filter->type == MPEGTS_SECTION) - av_freep(&filter->u.section_filter.section_buf); - av_free(filter); - ts->pids[pid] = NULL; -} - -/* autodetect fec presence. Must have at least 1024 bytes */ -static int get_packet_size(const uint8_t *buf, int size) -{ - int i; - - if (size < (TS_FEC_PACKET_SIZE * 5 + 1)) - return -1; - for(i=0;i<5;i++) { - if (buf[i * TS_PACKET_SIZE] != 0x47) - goto try_fec; - } - return TS_PACKET_SIZE; - try_fec: - for(i=0;i<5;i++) { - if (buf[i * TS_FEC_PACKET_SIZE] != 0x47) - return -1; - } - return TS_FEC_PACKET_SIZE; -} - -typedef struct SectionHeader { - uint8_t tid; - uint16_t id; - uint8_t version; - uint8_t sec_num; - uint8_t last_sec_num; -} SectionHeader; - -static inline int get8(const uint8_t **pp, const uint8_t *p_end) -{ - const uint8_t *p; - int c; - - p = *pp; - if (p >= p_end) - return -1; - c = *p++; - *pp = p; - return c; -} - -static inline int get16(const uint8_t **pp, const uint8_t *p_end) -{ - const uint8_t *p; - int c; - - p = *pp; - if ((p + 1) >= p_end) - return -1; - c = (p[0] << 8) | p[1]; - p += 2; - *pp = p; - return c; -} - -/* read and allocate a DVB string preceeded by its length */ -static char *getstr8(const uint8_t **pp, const uint8_t *p_end) -{ - int len; - const uint8_t *p; - char *str; - - p = *pp; - len = get8(&p, p_end); - if (len < 0) - return NULL; - if ((p + len) > p_end) - return NULL; - str = av_malloc(len + 1); - if (!str) - return NULL; - memcpy(str, p, len); - str[len] = '\0'; - p += len; - *pp = p; - return str; -} - -static int parse_section_header(SectionHeader *h, - const uint8_t **pp, const uint8_t *p_end) -{ - int val; - - val = get8(pp, p_end); - if (val < 0) - return -1; - h->tid = val; - *pp += 2; - val = get16(pp, p_end); - if (val < 0) - return -1; - h->id = val; - val = get8(pp, p_end); - if (val < 0) - return -1; - h->version = (val >> 1) & 0x1f; - val = get8(pp, p_end); - if (val < 0) - return -1; - h->sec_num = val; - val = get8(pp, p_end); - if (val < 0) - return -1; - h->last_sec_num = val; - return 0; -} - -static MpegTSService *new_service(MpegTSContext *ts, int sid, - char *provider_name, char *name) -{ - MpegTSService *service; - -#ifdef DEBUG_SI - printf("new_service: sid=0x%04x provider='%s' name='%s'\n", - sid, provider_name, name); -#endif - - service = av_mallocz(sizeof(MpegTSService)); - if (!service) - return NULL; - service->sid = sid; - service->provider_name = provider_name; - service->name = name; - dynarray_add(&ts->services, &ts->nb_services, service); - return service; -} - -static void pmt_cb(void *opaque, const uint8_t *section, int section_len) -{ - MpegTSContext *ts = opaque; - SectionHeader h1, *h = &h1; - const uint8_t *p, *p_end; - int program_info_length, pcr_pid, pid, stream_type, desc_length; - -#ifdef DEBUG_SI - printf("PMT:\n"); - av_hex_dump((uint8_t *)section, section_len); -#endif - p_end = section + section_len - 4; - p = section; - if (parse_section_header(h, &p, p_end) < 0) - return; -#ifdef DEBUG_SI - printf("sid=0x%x sec_num=%d/%d\n", h->id, h->sec_num, h->last_sec_num); -#endif - if (h->tid != PMT_TID || (ts->req_sid >= 0 && h->id != ts->req_sid) ) - return; - - pcr_pid = get16(&p, p_end) & 0x1fff; - if (pcr_pid < 0) - return; -#ifdef DEBUG_SI - printf("pcr_pid=0x%x\n", pcr_pid); -#endif - program_info_length = get16(&p, p_end) & 0xfff; - if (program_info_length < 0) - return; - p += program_info_length; - if (p >= p_end) - return; - for(;;) { - stream_type = get8(&p, p_end); - if (stream_type < 0) - break; - pid = get16(&p, p_end) & 0x1fff; - if (pid < 0) - break; - desc_length = get16(&p, p_end) & 0xfff; - if (desc_length < 0) - break; - p += desc_length; - if (p > p_end) - return; - -#ifdef DEBUG_SI - printf("stream_type=%d pid=0x%x\n", stream_type, pid); -#endif - - /* now create ffmpeg stream */ - switch(stream_type) { - case STREAM_TYPE_AUDIO_MPEG1: - case STREAM_TYPE_AUDIO_MPEG2: - case STREAM_TYPE_VIDEO_MPEG1: - case STREAM_TYPE_VIDEO_MPEG2: - case STREAM_TYPE_AUDIO_AC3: - add_pes_stream(ts->stream, pid); - break; - default: - /* we ignore the other streams */ - break; - } - } - /* all parameters are there */ - ts->set_service_cb(ts->set_service_opaque, 0); - mpegts_close_filter(ts, ts->pmt_filter); - ts->pmt_filter = NULL; -} - -static void pat_cb(void *opaque, const uint8_t *section, int section_len) -{ - MpegTSContext *ts = opaque; - SectionHeader h1, *h = &h1; - const uint8_t *p, *p_end; - int sid, pmt_pid; - -#ifdef DEBUG_SI - printf("PAT:\n"); - av_hex_dump((uint8_t *)section, section_len); -#endif - p_end = section + section_len - 4; - p = section; - if (parse_section_header(h, &p, p_end) < 0) - return; - if (h->tid != PAT_TID) - return; - - for(;;) { - sid = get16(&p, p_end); - if (sid < 0) - break; - pmt_pid = get16(&p, p_end) & 0x1fff; - if (pmt_pid < 0) - break; -#ifdef DEBUG_SI - printf("sid=0x%x pid=0x%x\n", sid, pmt_pid); -#endif - if (sid == 0x0000) { - /* NIT info */ - } else { - if (ts->req_sid == sid) { - ts->pmt_filter = mpegts_open_section_filter(ts, pmt_pid, - pmt_cb, ts, 1); - goto found; - } - } - } - /* not found */ - ts->set_service_cb(ts->set_service_opaque, -1); - - found: - mpegts_close_filter(ts, ts->pat_filter); - ts->pat_filter = NULL; -} - -/* add all services found in the PAT */ -static void pat_scan_cb(void *opaque, const uint8_t *section, int section_len) -{ - MpegTSContext *ts = opaque; - SectionHeader h1, *h = &h1; - const uint8_t *p, *p_end; - int sid, pmt_pid; - char *provider_name, *name; - char buf[256]; - -#ifdef DEBUG_SI - printf("PAT:\n"); - av_hex_dump((uint8_t *)section, section_len); -#endif - p_end = section + section_len - 4; - p = section; - if (parse_section_header(h, &p, p_end) < 0) - return; - if (h->tid != PAT_TID) - return; - - for(;;) { - sid = get16(&p, p_end); - if (sid < 0) - break; - pmt_pid = get16(&p, p_end) & 0x1fff; - if (pmt_pid < 0) - break; -#ifdef DEBUG_SI - printf("sid=0x%x pid=0x%x\n", sid, pmt_pid); -#endif - if (sid == 0x0000) { - /* NIT info */ - } else { - /* add the service with a dummy name */ - snprintf(buf, sizeof(buf), "Service %x\n", sid); - name = av_strdup(buf); - provider_name = av_strdup(""); - if (name && provider_name) { - new_service(ts, sid, provider_name, name); - } else { - av_freep(&name); - av_freep(&provider_name); - } - } - } - ts->stop_parse = 1; - - /* remove filter */ - mpegts_close_filter(ts, ts->pat_filter); - ts->pat_filter = NULL; -} - -void mpegts_set_service(MpegTSContext *ts, int sid, - SetServiceCallback *set_service_cb, void *opaque) -{ - ts->set_service_cb = set_service_cb; - ts->set_service_opaque = opaque; - ts->req_sid = sid; - ts->pat_filter = mpegts_open_section_filter(ts, PAT_PID, - pat_cb, ts, 1); -} - -static void sdt_cb(void *opaque, const uint8_t *section, int section_len) -{ - MpegTSContext *ts = opaque; - SectionHeader h1, *h = &h1; - const uint8_t *p, *p_end, *desc_list_end, *desc_end; - int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type; - char *name, *provider_name; - -#ifdef DEBUG_SI - printf("SDT:\n"); - av_hex_dump((uint8_t *)section, section_len); -#endif - - p_end = section + section_len - 4; - p = section; - if (parse_section_header(h, &p, p_end) < 0) - return; - if (h->tid != SDT_TID) - return; - onid = get16(&p, p_end); - if (onid < 0) - return; - val = get8(&p, p_end); - if (val < 0) - return; - for(;;) { - sid = get16(&p, p_end); - if (sid < 0) - break; - val = get8(&p, p_end); - if (val < 0) - break; - desc_list_len = get16(&p, p_end) & 0xfff; - if (desc_list_len < 0) - break; - desc_list_end = p + desc_list_len; - if (desc_list_end > p_end) - break; - for(;;) { - desc_tag = get8(&p, desc_list_end); - if (desc_tag < 0) - break; - desc_len = get8(&p, desc_list_end); - desc_end = p + desc_len; - if (desc_end > desc_list_end) - break; -#ifdef DEBUG_SI - printf("tag: 0x%02x len=%d\n", desc_tag, desc_len); -#endif - switch(desc_tag) { - case 0x48: - service_type = get8(&p, p_end); - if (service_type < 0) - break; - provider_name = getstr8(&p, p_end); - if (!provider_name) - break; - name = getstr8(&p, p_end); - if (!name) - break; - new_service(ts, sid, provider_name, name); - break; - default: - break; - } - p = desc_end; - } - p = desc_list_end; - } - ts->stop_parse = 1; - - /* remove filter */ - mpegts_close_filter(ts, ts->sdt_filter); - ts->sdt_filter = NULL; -} - -/* scan services in a transport stream by looking at the SDT */ -void mpegts_scan_sdt(MpegTSContext *ts) -{ - ts->sdt_filter = mpegts_open_section_filter(ts, SDT_PID, - sdt_cb, ts, 1); -} - -/* scan services in a transport stream by looking at the PAT (better - than nothing !) */ -void mpegts_scan_pat(MpegTSContext *ts) -{ - ts->pat_filter = mpegts_open_section_filter(ts, PAT_PID, - pat_scan_cb, ts, 1); -} - -/* TS stream handling */ - -enum MpegTSState { - MPEGTS_HEADER = 0, - MPEGTS_PESHEADER_FILL, - MPEGTS_PAYLOAD, - MPEGTS_SKIP, -}; - -/* enough for PES header + length */ -#define PES_START_SIZE 9 -#define MAX_PES_HEADER_SIZE (9 + 255) - -typedef struct PESContext { - int pid; - AVFormatContext *stream; - AVStream *st; - enum MpegTSState state; - /* used to get the format */ - int data_index; - int total_size; - int pes_header_size; - int64_t pts, dts; - uint8_t header[MAX_PES_HEADER_SIZE]; -} PESContext; - -static int64_t get_pts(const uint8_t *p) -{ - int64_t pts; - int val; - - pts = (int64_t)((p[0] >> 1) & 0x07) << 30; - val = (p[1] << 8) | p[2]; - pts |= (int64_t)(val >> 1) << 15; - val = (p[3] << 8) | p[4]; - pts |= (int64_t)(val >> 1); - return pts; -} - -/* return non zero if a packet could be constructed */ -static void mpegts_push_data(void *opaque, - const uint8_t *buf, int buf_size, int is_start) -{ - PESContext *pes = opaque; - MpegTSContext *ts = pes->stream->priv_data; - AVStream *st; - const uint8_t *p; - int len, code, codec_type, codec_id; - - if (is_start) { - pes->state = MPEGTS_HEADER; - pes->data_index = 0; - } - p = buf; - while (buf_size > 0) { - switch(pes->state) { - case MPEGTS_HEADER: - len = PES_START_SIZE - pes->data_index; - if (len > buf_size) - len = buf_size; - memcpy(pes->header + pes->data_index, p, len); - pes->data_index += len; - p += len; - buf_size -= len; - if (pes->data_index == PES_START_SIZE) { - /* we got all the PES or section header. We can now - decide */ -#if 0 - av_hex_dump(pes->header, pes->data_index); -#endif - if (pes->header[0] == 0x00 && pes->header[1] == 0x00 && - pes->header[2] == 0x01) { - /* it must be an mpeg2 PES stream */ - code = pes->header[3] | 0x100; - if (!((code >= 0x1c0 && code <= 0x1df) || - (code >= 0x1e0 && code <= 0x1ef) || - (code == 0x1bd))) - goto skip; - if (!pes->st) { - /* allocate stream */ - if (code >= 0x1c0 && code <= 0x1df) { - codec_type = CODEC_TYPE_AUDIO; - codec_id = CODEC_ID_MP2; - } else if (code == 0x1bd) { - codec_type = CODEC_TYPE_AUDIO; - codec_id = CODEC_ID_AC3; - } else { - codec_type = CODEC_TYPE_VIDEO; - codec_id = CODEC_ID_MPEG1VIDEO; - } - st = av_new_stream(pes->stream, pes->pid); - if (st) { - st->priv_data = pes; - st->codec.codec_type = codec_type; - st->codec.codec_id = codec_id; - pes->st = st; - } - } - pes->state = MPEGTS_PESHEADER_FILL; - pes->total_size = (pes->header[4] << 8) | pes->header[5]; - /* NOTE: a zero total size means the PES size is - unbounded */ - if (pes->total_size) - pes->total_size += 6; - pes->pes_header_size = pes->header[8] + 9; - } else { - /* otherwise, it should be a table */ - /* skip packet */ - skip: - pes->state = MPEGTS_SKIP; - continue; - } - } - break; - /**********************************************/ - /* PES packing parsing */ - case MPEGTS_PESHEADER_FILL: - len = pes->pes_header_size - pes->data_index; - if (len > buf_size) - len = buf_size; - memcpy(pes->header + pes->data_index, p, len); - pes->data_index += len; - p += len; - buf_size -= len; - if (pes->data_index == pes->pes_header_size) { - const uint8_t *r; - unsigned int flags; - - flags = pes->header[7]; - r = pes->header + 9; - pes->pts = AV_NOPTS_VALUE; - pes->dts = AV_NOPTS_VALUE; - if ((flags & 0xc0) == 0x80) { - pes->pts = get_pts(r); - r += 5; - } else if ((flags & 0xc0) == 0xc0) { - pes->pts = get_pts(r); - r += 5; - pes->dts = get_pts(r); - r += 5; - } - /* we got the full header. We parse it and get the payload */ - pes->state = MPEGTS_PAYLOAD; - } - break; - case MPEGTS_PAYLOAD: - if (pes->total_size) { - len = pes->total_size - pes->data_index; - if (len > buf_size) - len = buf_size; - } else { - len = buf_size; - } - if (len > 0) { - AVPacket *pkt = ts->pkt; - if (pes->st && av_new_packet(pkt, len) == 0) { - memcpy(pkt->data, p, len); - pkt->stream_index = pes->st->index; - pkt->pts = pes->pts; - /* reset pts values */ - pes->pts = AV_NOPTS_VALUE; - pes->dts = AV_NOPTS_VALUE; - ts->stop_parse = 1; - return; - } - } - buf_size = 0; - break; - case MPEGTS_SKIP: - buf_size = 0; - break; - } - } -} - -static int add_pes_stream(AVFormatContext *s, int pid) -{ - MpegTSContext *ts = s->priv_data; - MpegTSFilter *tss; - PESContext *pes; - - /* if no pid found, then add a pid context */ - pes = av_mallocz(sizeof(PESContext)); - if (!pes) - return -1; - pes->stream = s; - pes->pid = pid; - tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes); - if (!tss) { - av_free(pes); - return -1; - } - return 0; -} - -/* handle one TS packet */ -static void handle_packet(AVFormatContext *s, uint8_t *packet) -{ - MpegTSContext *ts = s->priv_data; - MpegTSFilter *tss; - int len, pid, cc, cc_ok, afc, is_start; - const uint8_t *p, *p_end; - - pid = ((packet[1] & 0x1f) << 8) | packet[2]; - is_start = packet[1] & 0x40; - tss = ts->pids[pid]; - if (ts->auto_guess && tss == NULL && is_start) { - add_pes_stream(s, pid); - tss = ts->pids[pid]; - } - if (!tss) - return; - - /* continuity check (currently not used) */ - cc = (packet[3] & 0xf); - cc_ok = (tss->last_cc < 0) || ((((tss->last_cc + 1) & 0x0f) == cc)); - tss->last_cc = cc; - - /* skip adaptation field */ - afc = (packet[3] >> 4) & 3; - p = packet + 4; - if (afc == 0) /* reserved value */ - return; - if (afc == 2) /* adaptation field only */ - return; - if (afc == 3) { - /* skip adapation field */ - p += p[0] + 1; - } - /* if past the end of packet, ignore */ - p_end = packet + TS_PACKET_SIZE; - if (p >= p_end) - return; - - if (tss->type == MPEGTS_SECTION) { - if (is_start) { - /* pointer field present */ - len = *p++; - if (p + len > p_end) - return; - if (len && cc_ok) { - /* write remaning section bytes */ - write_section_data(s, tss, - p, len, 0); - } - p += len; - if (p < p_end) { - write_section_data(s, tss, - p, p_end - p, 1); - } - } else { - if (cc_ok) { - write_section_data(s, tss, - p, p_end - p, 0); - } - } - } else { - tss->u.pes_filter.pes_cb(tss->u.pes_filter.opaque, - p, p_end - p, is_start); - } -} - -/* XXX: try to find a better synchro over several packets (use - get_packet_size() ?) */ -static int mpegts_resync(AVFormatContext *s) -{ - ByteIOContext *pb = &s->pb; - int c, i; - - for(i = 0;i < MAX_RESYNC_SIZE; i++) { - c = url_fgetc(pb); - if (c < 0) - return -1; - if (c == 0x47) { - url_fseek(pb, -1, SEEK_CUR); - return 0; - } - } - /* no sync found */ - return -1; -} - -static int handle_packets(AVFormatContext *s, int nb_packets) -{ - MpegTSContext *ts = s->priv_data; - ByteIOContext *pb = &s->pb; - uint8_t packet[TS_FEC_PACKET_SIZE]; - int packet_num, len; - int64_t pos; - - ts->stop_parse = 0; - packet_num = 0; - for(;;) { - if (ts->stop_parse) - break; - packet_num++; - if (nb_packets != 0 && packet_num >= nb_packets) - break; - pos = url_ftell(pb); - len = get_buffer(pb, packet, ts->raw_packet_size); - if (len != ts->raw_packet_size) - return AVERROR_IO; - /* check paquet sync byte */ - if (packet[0] != 0x47) { - /* find a new packet start */ - url_fseek(pb, -ts->raw_packet_size, SEEK_CUR); - if (mpegts_resync(s) < 0) - return AVERROR_INVALIDDATA; - else - continue; - } - handle_packet(s, packet); - } - return 0; -} - -static int mpegts_probe(AVProbeData *p) -{ -#if 1 - int size; - size = get_packet_size(p->buf, p->buf_size); - if (size < 0) - return 0; - return AVPROBE_SCORE_MAX - 1; -#else - /* only use the extension for safer guess */ - if (match_ext(p->filename, "ts")) - return AVPROBE_SCORE_MAX; - else - return 0; -#endif -} - -void set_service_cb(void *opaque, int ret) -{ - MpegTSContext *ts = opaque; - ts->set_service_ret = ret; - ts->stop_parse = 1; -} - -static int mpegts_read_header(AVFormatContext *s, - AVFormatParameters *ap) -{ - MpegTSContext *ts = s->priv_data; - ByteIOContext *pb = &s->pb; - uint8_t buf[1024]; - int len, sid; - int64_t pos; - MpegTSService *service; - - /* read the first 1024 bytes to get packet size */ - pos = url_ftell(pb); - len = get_buffer(pb, buf, sizeof(buf)); - if (len != sizeof(buf)) - goto fail; - ts->raw_packet_size = get_packet_size(buf, sizeof(buf)); - if (ts->raw_packet_size <= 0) - goto fail; - ts->auto_guess = 0; - - if (!ts->auto_guess) { - ts->set_service_ret = -1; - - /* first do a scaning to get all the services */ - url_fseek(pb, pos, SEEK_SET); - mpegts_scan_sdt(ts); - - handle_packets(s, MAX_SCAN_PACKETS); - - if (ts->nb_services <= 0) { - /* no SDT found, we try to look at the PAT */ - - url_fseek(pb, pos, SEEK_SET); - mpegts_scan_pat(ts); - - handle_packets(s, MAX_SCAN_PACKETS); - } - - if (ts->nb_services <= 0) - return -1; - - /* tune to first service found */ - service = ts->services[0]; - sid = service->sid; -#ifdef DEBUG_SI - printf("tuning to '%s'\n", service->name); -#endif - - /* now find the info for the first service if we found any, - otherwise try to filter all PATs */ - - url_fseek(pb, pos, SEEK_SET); - ts->stream = s; - mpegts_set_service(ts, sid, set_service_cb, ts); - - handle_packets(s, MAX_SCAN_PACKETS); - - /* if could not find service, exit */ - if (ts->set_service_ret != 0) - return -1; - -#ifdef DEBUG_SI - printf("tuning done\n"); -#endif - } - - url_fseek(pb, pos, SEEK_SET); - return 0; - fail: - return -1; -} - -static int mpegts_read_packet(AVFormatContext *s, - AVPacket *pkt) -{ - MpegTSContext *ts = s->priv_data; - ts->pkt = pkt; - return handle_packets(s, 0); -} - -static int mpegts_read_close(AVFormatContext *s) -{ - MpegTSContext *ts = s->priv_data; - int i; - for(i=0;ipids[i]); - return 0; -} - -AVInputFormat mpegts_demux = { - "mpegts", - "MPEG2 transport stream format", - sizeof(MpegTSContext), - mpegts_probe, - mpegts_read_header, - mpegts_read_packet, - mpegts_read_close, - .flags = AVFMT_NOHEADER | AVFMT_SHOW_IDS, -}; - -int mpegts_init(void) -{ - av_register_input_format(&mpegts_demux); - av_register_output_format(&mpegts_mux); - return 0; -}