From 0ea721f7ce81357bc4ec6eea609cd50482c3d15b Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Diego=20=27Flameeyes=27=20Petten=C3=B2?= Date: Sat, 2 Dec 2006 01:19:48 +0000 Subject: 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 --- contrib/ffmpeg/libavformat/utils.c | 3108 ++++++++++++++++++++++++++++++++++++ 1 file changed, 3108 insertions(+) create mode 100644 contrib/ffmpeg/libavformat/utils.c (limited to 'contrib/ffmpeg/libavformat/utils.c') diff --git a/contrib/ffmpeg/libavformat/utils.c b/contrib/ffmpeg/libavformat/utils.c new file mode 100644 index 000000000..eaeeb7c16 --- /dev/null +++ b/contrib/ffmpeg/libavformat/utils.c @@ -0,0 +1,3108 @@ +/* + * Various utilities for ffmpeg system + * Copyright (c) 2000, 2001, 2002 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 "allformats.h" +#include "opt.h" + +#undef NDEBUG +#include + +/** + * @file libavformat/utils.c + * Various utility functions for using ffmpeg library. + */ + +static void av_frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den); +static void av_frac_add(AVFrac *f, int64_t incr); +static void av_frac_set(AVFrac *f, int64_t val); + +/** head of registered input format linked list. */ +AVInputFormat *first_iformat = NULL; +/** head of registered output format linked list. */ +AVOutputFormat *first_oformat = NULL; + +void av_register_input_format(AVInputFormat *format) +{ + AVInputFormat **p; + p = &first_iformat; + while (*p != NULL) p = &(*p)->next; + *p = format; + format->next = NULL; +} + +void av_register_output_format(AVOutputFormat *format) +{ + AVOutputFormat **p; + p = &first_oformat; + while (*p != NULL) p = &(*p)->next; + *p = format; + format->next = NULL; +} + +int match_ext(const char *filename, const char *extensions) +{ + const char *ext, *p; + char ext1[32], *q; + + if(!filename) + return 0; + + ext = strrchr(filename, '.'); + if (ext) { + ext++; + p = extensions; + for(;;) { + q = ext1; + while (*p != '\0' && *p != ',' && q-ext1name && short_name && !strcmp(fmt->name, short_name)) + score += 100; + if (fmt->mime_type && mime_type && !strcmp(fmt->mime_type, mime_type)) + score += 10; + if (filename && fmt->extensions && + match_ext(filename, fmt->extensions)) { + score += 5; + } + if (score > score_max) { + score_max = score; + fmt_found = fmt; + } + fmt = fmt->next; + } + return fmt_found; +} + +AVOutputFormat *guess_stream_format(const char *short_name, const char *filename, + const char *mime_type) +{ + AVOutputFormat *fmt = guess_format(short_name, filename, mime_type); + + if (fmt) { + AVOutputFormat *stream_fmt; + char stream_format_name[64]; + + snprintf(stream_format_name, sizeof(stream_format_name), "%s_stream", fmt->name); + stream_fmt = guess_format(stream_format_name, NULL, NULL); + + if (stream_fmt) + fmt = stream_fmt; + } + + return fmt; +} + +/** + * Guesses the codec id based upon muxer and filename. + */ +enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name, + const char *filename, const char *mime_type, enum CodecType type){ + if(type == CODEC_TYPE_VIDEO){ + enum CodecID codec_id= CODEC_ID_NONE; + +#ifdef CONFIG_IMAGE2_MUXER + if(!strcmp(fmt->name, "image2") || !strcmp(fmt->name, "image2pipe")){ + codec_id= av_guess_image2_codec(filename); + } +#endif + if(codec_id == CODEC_ID_NONE) + codec_id= fmt->video_codec; + return codec_id; + }else if(type == CODEC_TYPE_AUDIO) + return fmt->audio_codec; + else + return CODEC_ID_NONE; +} + +/** + * finds AVInputFormat based on input format's short name. + */ +AVInputFormat *av_find_input_format(const char *short_name) +{ + AVInputFormat *fmt; + for(fmt = first_iformat; fmt != NULL; fmt = fmt->next) { + if (!strcmp(fmt->name, short_name)) + return fmt; + } + return NULL; +} + +/* memory handling */ + +/** + * Default packet destructor. + */ +void av_destruct_packet(AVPacket *pkt) +{ + av_free(pkt->data); + pkt->data = NULL; pkt->size = 0; +} + +/** + * Allocate the payload of a packet and intialized its fields to default values. + * + * @param pkt packet + * @param size wanted payload size + * @return 0 if OK. AVERROR_xxx otherwise. + */ +int av_new_packet(AVPacket *pkt, int size) +{ + uint8_t *data; + if((unsigned)size > (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE) + return AVERROR_NOMEM; + data = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE); + if (!data) + return AVERROR_NOMEM; + memset(data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE); + + av_init_packet(pkt); + pkt->data = data; + pkt->size = size; + pkt->destruct = av_destruct_packet; + return 0; +} + +/** + * Allocate and read the payload of a packet and intialized its fields to default values. + * + * @param pkt packet + * @param size wanted payload size + * @return >0 (read size) if OK. AVERROR_xxx otherwise. + */ +int av_get_packet(ByteIOContext *s, AVPacket *pkt, int size) +{ + int ret= av_new_packet(pkt, size); + + if(ret<0) + return ret; + + pkt->pos= url_ftell(s); + + ret= get_buffer(s, pkt->data, size); + if(ret<=0) + av_free_packet(pkt); + else + pkt->size= ret; + + return ret; +} + +/* This is a hack - the packet memory allocation stuff is broken. The + packet is allocated if it was not really allocated */ +int av_dup_packet(AVPacket *pkt) +{ + if (pkt->destruct != av_destruct_packet) { + uint8_t *data; + /* we duplicate the packet and don't forget to put the padding + again */ + if((unsigned)pkt->size > (unsigned)pkt->size + FF_INPUT_BUFFER_PADDING_SIZE) + return AVERROR_NOMEM; + data = av_malloc(pkt->size + FF_INPUT_BUFFER_PADDING_SIZE); + if (!data) { + return AVERROR_NOMEM; + } + memcpy(data, pkt->data, pkt->size); + memset(data + pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE); + pkt->data = data; + pkt->destruct = av_destruct_packet; + } + return 0; +} + +/** + * Allocate the payload of a packet and intialized its fields to default values. + * + * @param filename possible numbered sequence string + * @return 1 if a valid numbered sequence string, 0 otherwise. + */ +int av_filename_number_test(const char *filename) +{ + char buf[1024]; + return filename && (av_get_frame_filename(buf, sizeof(buf), filename, 1)>=0); +} + +/** + * Guess file format. + */ +AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened) +{ + AVInputFormat *fmt1, *fmt; + int score, score_max; + + fmt = NULL; + score_max = 0; + for(fmt1 = first_iformat; fmt1 != NULL; fmt1 = fmt1->next) { + if (!is_opened && !(fmt1->flags & AVFMT_NOFILE)) + continue; + score = 0; + if (fmt1->read_probe) { + score = fmt1->read_probe(pd); + } else if (fmt1->extensions) { + if (match_ext(pd->filename, fmt1->extensions)) { + score = 50; + } + } + if (score > score_max) { + score_max = score; + fmt = fmt1; + } + } + return fmt; +} + +/************************************************************/ +/* input media file */ + +/** + * Open a media file from an IO stream. 'fmt' must be specified. + */ +static const char* format_to_name(void* ptr) +{ + AVFormatContext* fc = (AVFormatContext*) ptr; + if(fc->iformat) return fc->iformat->name; + else if(fc->oformat) return fc->oformat->name; + else return "NULL"; +} + +#define OFFSET(x) offsetof(AVFormatContext,x) +#define DEFAULT 0 //should be NAN but it doesnt work as its not a constant in glibc as required by ANSI/ISO C +//these names are too long to be readable +#define E AV_OPT_FLAG_ENCODING_PARAM +#define D AV_OPT_FLAG_DECODING_PARAM + +static const AVOption options[]={ +{"probesize", NULL, OFFSET(probesize), FF_OPT_TYPE_INT, 32000, 32, INT_MAX, D}, /* 32000 from mpegts.c: 1.0 second at 24Mbit/s */ +{"muxrate", "set mux rate", OFFSET(mux_rate), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, E}, +{"packetsize", "set packet size", OFFSET(packet_size), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, E}, +{"fflags", NULL, OFFSET(flags), FF_OPT_TYPE_FLAGS, DEFAULT, INT_MIN, INT_MAX, D|E, "fflags"}, +{"ignidx", "ignore index", 0, FF_OPT_TYPE_CONST, AVFMT_FLAG_IGNIDX, INT_MIN, INT_MAX, D, "fflags"}, +{"genpts", "generate pts", 0, FF_OPT_TYPE_CONST, AVFMT_FLAG_GENPTS, INT_MIN, INT_MAX, D, "fflags"}, +{"track", " set the track number", OFFSET(track), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, E}, +{"year", "set the year", OFFSET(year), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, E}, +{NULL}, +}; + +#undef E +#undef D +#undef DEFAULT + +static const AVClass av_format_context_class = { "AVFormatContext", format_to_name, options }; + +#if LIBAVFORMAT_VERSION_INT >= ((51<<16)+(0<<8)+0) +static +#endif +void avformat_get_context_defaults(AVFormatContext *s){ + memset(s, 0, sizeof(AVFormatContext)); + + s->av_class = &av_format_context_class; + + av_opt_set_defaults(s); +} + +AVFormatContext *av_alloc_format_context(void) +{ + AVFormatContext *ic; + ic = av_malloc(sizeof(AVFormatContext)); + if (!ic) return ic; + avformat_get_context_defaults(ic); + ic->av_class = &av_format_context_class; + return ic; +} + +/** + * Allocates all the structures needed to read an input stream. + * This does not open the needed codecs for decoding the stream[s]. + */ +int av_open_input_stream(AVFormatContext **ic_ptr, + ByteIOContext *pb, const char *filename, + AVInputFormat *fmt, AVFormatParameters *ap) +{ + int err; + AVFormatContext *ic; + AVFormatParameters default_ap; + + if(!ap){ + ap=&default_ap; + memset(ap, 0, sizeof(default_ap)); + } + + if(!ap->prealloced_context) + ic = av_alloc_format_context(); + else + ic = *ic_ptr; + if (!ic) { + err = AVERROR_NOMEM; + goto fail; + } + ic->iformat = fmt; + if (pb) + ic->pb = *pb; + ic->duration = AV_NOPTS_VALUE; + ic->start_time = AV_NOPTS_VALUE; + pstrcpy(ic->filename, sizeof(ic->filename), filename); + + /* allocate private data */ + if (fmt->priv_data_size > 0) { + ic->priv_data = av_mallocz(fmt->priv_data_size); + if (!ic->priv_data) { + err = AVERROR_NOMEM; + goto fail; + } + } else { + ic->priv_data = NULL; + } + + err = ic->iformat->read_header(ic, ap); + if (err < 0) + goto fail; + + if (pb && !ic->data_offset) + ic->data_offset = url_ftell(&ic->pb); + + *ic_ptr = ic; + return 0; + fail: + if (ic) { + av_freep(&ic->priv_data); + } + av_free(ic); + *ic_ptr = NULL; + return err; +} + +/** Size of probe buffer, for guessing file type from file contents. */ +#define PROBE_BUF_MIN 2048 +#define PROBE_BUF_MAX (1<<20) + +/** + * Open a media file as input. The codec are not opened. Only the file + * header (if present) is read. + * + * @param ic_ptr the opened media file handle is put here + * @param filename filename to open. + * @param fmt if non NULL, force the file format to use + * @param buf_size optional buffer size (zero if default is OK) + * @param ap additionnal parameters needed when opening the file (NULL if default) + * @return 0 if OK. AVERROR_xxx otherwise. + */ +int av_open_input_file(AVFormatContext **ic_ptr, const char *filename, + AVInputFormat *fmt, + int buf_size, + AVFormatParameters *ap) +{ + int err, must_open_file, file_opened, probe_size; + AVProbeData probe_data, *pd = &probe_data; + ByteIOContext pb1, *pb = &pb1; + + file_opened = 0; + pd->filename = ""; + if (filename) + pd->filename = filename; + pd->buf = NULL; + pd->buf_size = 0; + + if (!fmt) { + /* guess format if no file can be opened */ + fmt = av_probe_input_format(pd, 0); + } + + /* do not open file if the format does not need it. XXX: specific + hack needed to handle RTSP/TCP */ + must_open_file = 1; + if (fmt && (fmt->flags & AVFMT_NOFILE)) { + must_open_file = 0; + pb= NULL; //FIXME this or memset(pb, 0, sizeof(ByteIOContext)); otherwise its uninitalized + } + + if (!fmt || must_open_file) { + /* if no file needed do not try to open one */ + if (url_fopen(pb, filename, URL_RDONLY) < 0) { + err = AVERROR_IO; + goto fail; + } + file_opened = 1; + if (buf_size > 0) { + url_setbufsize(pb, buf_size); + } + + for(probe_size= PROBE_BUF_MIN; probe_size<=PROBE_BUF_MAX && !fmt; probe_size<<=1){ + /* read probe data */ + pd->buf= av_realloc(pd->buf, probe_size); + pd->buf_size = get_buffer(pb, pd->buf, probe_size); + if (url_fseek(pb, 0, SEEK_SET) == (offset_t)-EPIPE) { + url_fclose(pb); + if (url_fopen(pb, filename, URL_RDONLY) < 0) { + file_opened = 0; + err = AVERROR_IO; + goto fail; + } + } + /* guess file format */ + fmt = av_probe_input_format(pd, 1); + } + av_freep(&pd->buf); + } + + /* if still no format found, error */ + if (!fmt) { + err = AVERROR_NOFMT; + goto fail; + } + + /* XXX: suppress this hack for redirectors */ +#ifdef CONFIG_NETWORK + if (fmt == &redir_demuxer) { + err = redir_open(ic_ptr, pb); + url_fclose(pb); + return err; + } +#endif + + /* check filename in case of an image number is expected */ + if (fmt->flags & AVFMT_NEEDNUMBER) { + if (!av_filename_number_test(filename)) { + err = AVERROR_NUMEXPECTED; + goto fail; + } + } + err = av_open_input_stream(ic_ptr, pb, filename, fmt, ap); + if (err) + goto fail; + return 0; + fail: + av_freep(&pd->buf); + if (file_opened) + url_fclose(pb); + *ic_ptr = NULL; + return err; + +} + +/*******************************************************/ + +/** + * Read a transport packet from a media file. + * + * This function is absolete and should never be used. + * Use av_read_frame() instead. + * + * @param s media file handle + * @param pkt is filled + * @return 0 if OK. AVERROR_xxx if error. + */ +int av_read_packet(AVFormatContext *s, AVPacket *pkt) +{ + return s->iformat->read_packet(s, pkt); +} + +/**********************************************************/ + +/** + * Get the number of samples of an audio frame. Return (-1) if error. + */ +static int get_audio_frame_size(AVCodecContext *enc, int size) +{ + int frame_size; + + if (enc->frame_size <= 1) { + int bits_per_sample = av_get_bits_per_sample(enc->codec_id); + + if (bits_per_sample) { + if (enc->channels == 0) + return -1; + frame_size = (size << 3) / (bits_per_sample * enc->channels); + } else { + /* used for example by ADPCM codecs */ + if (enc->bit_rate == 0) + return -1; + frame_size = (size * 8 * enc->sample_rate) / enc->bit_rate; + } + } else { + frame_size = enc->frame_size; + } + return frame_size; +} + + +/** + * Return the frame duration in seconds, return 0 if not available. + */ +static void compute_frame_duration(int *pnum, int *pden, AVStream *st, + AVCodecParserContext *pc, AVPacket *pkt) +{ + int frame_size; + + *pnum = 0; + *pden = 0; + switch(st->codec->codec_type) { + case CODEC_TYPE_VIDEO: + if(st->time_base.num*1000LL > st->time_base.den){ + *pnum = st->time_base.num; + *pden = st->time_base.den; + }else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){ + *pnum = st->codec->time_base.num; + *pden = st->codec->time_base.den; + if (pc && pc->repeat_pict) { + *pden *= 2; + *pnum = (*pnum) * (2 + pc->repeat_pict); + } + } + break; + case CODEC_TYPE_AUDIO: + frame_size = get_audio_frame_size(st->codec, pkt->size); + if (frame_size < 0) + break; + *pnum = frame_size; + *pden = st->codec->sample_rate; + break; + default: + break; + } +} + +static int is_intra_only(AVCodecContext *enc){ + if(enc->codec_type == CODEC_TYPE_AUDIO){ + return 1; + }else if(enc->codec_type == CODEC_TYPE_VIDEO){ + switch(enc->codec_id){ + case CODEC_ID_MJPEG: + case CODEC_ID_MJPEGB: + case CODEC_ID_LJPEG: + case CODEC_ID_RAWVIDEO: + case CODEC_ID_DVVIDEO: + case CODEC_ID_HUFFYUV: + case CODEC_ID_FFVHUFF: + case CODEC_ID_ASV1: + case CODEC_ID_ASV2: + case CODEC_ID_VCR1: + return 1; + default: break; + } + } + return 0; +} + +static int64_t lsb2full(int64_t lsb, int64_t last_ts, int lsb_bits){ + int64_t mask = lsb_bits < 64 ? (1LL<cur_dts != AV_NOPTS_VALUE){ + if(pkt->pts != AV_NOPTS_VALUE) + pkt->pts= lsb2full(pkt->pts, st->cur_dts, st->pts_wrap_bits); + if(pkt->dts != AV_NOPTS_VALUE) + pkt->dts= lsb2full(pkt->dts, st->cur_dts, st->pts_wrap_bits); + } + + if (pkt->duration == 0) { + compute_frame_duration(&num, &den, st, pc, pkt); + if (den && num) { + pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num); + } + } + + if(is_intra_only(st->codec)) + pkt->flags |= PKT_FLAG_KEY; + + /* do we have a video B frame ? */ + presentation_delayed = 0; + if (st->codec->codec_type == CODEC_TYPE_VIDEO) { + /* XXX: need has_b_frame, but cannot get it if the codec is + not initialized */ + if (( st->codec->codec_id == CODEC_ID_H264 + || st->codec->has_b_frames) && + pc && pc->pict_type != FF_B_TYPE) + presentation_delayed = 1; + /* this may be redundant, but it shouldnt hurt */ + if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts) + presentation_delayed = 1; + } + + if(st->cur_dts == AV_NOPTS_VALUE){ + if(presentation_delayed) st->cur_dts = -pkt->duration; + else st->cur_dts = 0; + } + +// av_log(NULL, AV_LOG_DEBUG, "IN delayed:%d pts:%"PRId64", dts:%"PRId64" cur_dts:%"PRId64" st:%d pc:%p\n", presentation_delayed, pkt->pts, pkt->dts, st->cur_dts, pkt->stream_index, pc); + /* interpolate PTS and DTS if they are not present */ + if (presentation_delayed) { + /* DTS = decompression time stamp */ + /* PTS = presentation time stamp */ + if (pkt->dts == AV_NOPTS_VALUE) { + /* if we know the last pts, use it */ + if(st->last_IP_pts != AV_NOPTS_VALUE) + st->cur_dts = pkt->dts = st->last_IP_pts; + else + pkt->dts = st->cur_dts; + } else { + st->cur_dts = pkt->dts; + } + /* this is tricky: the dts must be incremented by the duration + of the frame we are displaying, i.e. the last I or P frame */ + if (st->last_IP_duration == 0) + st->cur_dts += pkt->duration; + else + st->cur_dts += st->last_IP_duration; + st->last_IP_duration = pkt->duration; + st->last_IP_pts= pkt->pts; + /* cannot compute PTS if not present (we can compute it only + by knowing the futur */ + } else if(pkt->pts != AV_NOPTS_VALUE || pkt->dts != AV_NOPTS_VALUE || pkt->duration){ + if(pkt->pts != AV_NOPTS_VALUE && pkt->duration){ + int64_t old_diff= FFABS(st->cur_dts - pkt->duration - pkt->pts); + int64_t new_diff= FFABS(st->cur_dts - pkt->pts); + if(old_diff < new_diff && old_diff < (pkt->duration>>3)){ + pkt->pts += pkt->duration; +// av_log(NULL, AV_LOG_DEBUG, "id:%d old:%"PRId64" new:%"PRId64" dur:%d cur:%"PRId64" size:%d\n", pkt->stream_index, old_diff, new_diff, pkt->duration, st->cur_dts, pkt->size); + } + } + + /* presentation is not delayed : PTS and DTS are the same */ + if (pkt->pts == AV_NOPTS_VALUE) { + if (pkt->dts == AV_NOPTS_VALUE) { + pkt->pts = st->cur_dts; + pkt->dts = st->cur_dts; + } + else { + st->cur_dts = pkt->dts; + pkt->pts = pkt->dts; + } + } else { + st->cur_dts = pkt->pts; + pkt->dts = pkt->pts; + } + st->cur_dts += pkt->duration; + } +// av_log(NULL, AV_LOG_DEBUG, "OUTdelayed:%d pts:%"PRId64", dts:%"PRId64" cur_dts:%"PRId64"\n", presentation_delayed, pkt->pts, pkt->dts, st->cur_dts); + + /* update flags */ + if (pc) { + pkt->flags = 0; + /* key frame computation */ + switch(st->codec->codec_type) { + case CODEC_TYPE_VIDEO: + if (pc->pict_type == FF_I_TYPE) + pkt->flags |= PKT_FLAG_KEY; + break; + case CODEC_TYPE_AUDIO: + pkt->flags |= PKT_FLAG_KEY; + break; + default: + break; + } + } +} + +void av_destruct_packet_nofree(AVPacket *pkt) +{ + pkt->data = NULL; pkt->size = 0; +} + +static int av_read_frame_internal(AVFormatContext *s, AVPacket *pkt) +{ + AVStream *st; + int len, ret, i; + + for(;;) { + /* select current input stream component */ + st = s->cur_st; + if (st) { + if (!st->need_parsing || !st->parser) { + /* no parsing needed: we just output the packet as is */ + /* raw data support */ + *pkt = s->cur_pkt; + compute_pkt_fields(s, st, NULL, pkt); + s->cur_st = NULL; + break; + } else if (s->cur_len > 0 && st->discard < AVDISCARD_ALL) { + len = av_parser_parse(st->parser, st->codec, &pkt->data, &pkt->size, + s->cur_ptr, s->cur_len, + s->cur_pkt.pts, s->cur_pkt.dts); + s->cur_pkt.pts = AV_NOPTS_VALUE; + s->cur_pkt.dts = AV_NOPTS_VALUE; + /* increment read pointer */ + s->cur_ptr += len; + s->cur_len -= len; + + /* return packet if any */ + if (pkt->size) { + got_packet: + pkt->duration = 0; + pkt->stream_index = st->index; + pkt->pts = st->parser->pts; + pkt->dts = st->parser->dts; + pkt->destruct = av_destruct_packet_nofree; + compute_pkt_fields(s, st, st->parser, pkt); + break; + } + } else { + /* free packet */ + av_free_packet(&s->cur_pkt); + s->cur_st = NULL; + } + } else { + /* read next packet */ + ret = av_read_packet(s, &s->cur_pkt); + if (ret < 0) { + if (ret == -EAGAIN) + return ret; + /* return the last frames, if any */ + for(i = 0; i < s->nb_streams; i++) { + st = s->streams[i]; + if (st->parser && st->need_parsing) { + av_parser_parse(st->parser, st->codec, + &pkt->data, &pkt->size, + NULL, 0, + AV_NOPTS_VALUE, AV_NOPTS_VALUE); + if (pkt->size) + goto got_packet; + } + } + /* no more packets: really terminates parsing */ + return ret; + } + + st = s->streams[s->cur_pkt.stream_index]; + if(st->codec->debug & FF_DEBUG_PTS) + av_log(s, AV_LOG_DEBUG, "av_read_packet stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d\n", + s->cur_pkt.stream_index, + s->cur_pkt.pts, + s->cur_pkt.dts, + s->cur_pkt.size); + + s->cur_st = st; + s->cur_ptr = s->cur_pkt.data; + s->cur_len = s->cur_pkt.size; + if (st->need_parsing && !st->parser) { + st->parser = av_parser_init(st->codec->codec_id); + if (!st->parser) { + /* no parser available : just output the raw packets */ + st->need_parsing = 0; + }else if(st->need_parsing == 2){ + st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES; + } + } + } + } + if(st->codec->debug & FF_DEBUG_PTS) + av_log(s, AV_LOG_DEBUG, "av_read_frame_internal stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d\n", + pkt->stream_index, + pkt->pts, + pkt->dts, + pkt->size); + + return 0; +} + +/** + * Return the next frame of a stream. + * + * The returned packet is valid + * until the next av_read_frame() or until av_close_input_file() and + * must be freed with av_free_packet. For video, the packet contains + * exactly one frame. For audio, it contains an integer number of + * frames if each frame has a known fixed size (e.g. PCM or ADPCM + * data). If the audio frames have a variable size (e.g. MPEG audio), + * then it contains one frame. + * + * pkt->pts, pkt->dts and pkt->duration are always set to correct + * values in AV_TIME_BASE unit (and guessed if the format cannot + * provided them). pkt->pts can be AV_NOPTS_VALUE if the video format + * has B frames, so it is better to rely on pkt->dts if you do not + * decompress the payload. + * + * @return 0 if OK, < 0 if error or end of file. + */ +int av_read_frame(AVFormatContext *s, AVPacket *pkt) +{ + AVPacketList *pktl; + int eof=0; + const int genpts= s->flags & AVFMT_FLAG_GENPTS; + + for(;;){ + pktl = s->packet_buffer; + if (pktl) { + AVPacket *next_pkt= &pktl->pkt; + + if(genpts && next_pkt->dts != AV_NOPTS_VALUE){ + while(pktl && next_pkt->pts == AV_NOPTS_VALUE){ + if( pktl->pkt.stream_index == next_pkt->stream_index + && next_pkt->dts < pktl->pkt.dts + && pktl->pkt.pts != pktl->pkt.dts //not b frame + /*&& pktl->pkt.dts != AV_NOPTS_VALUE*/){ + next_pkt->pts= pktl->pkt.dts; + } + pktl= pktl->next; + } + pktl = s->packet_buffer; + } + + if( next_pkt->pts != AV_NOPTS_VALUE + || next_pkt->dts == AV_NOPTS_VALUE + || !genpts || eof){ + /* read packet from packet buffer, if there is data */ + *pkt = *next_pkt; + s->packet_buffer = pktl->next; + av_free(pktl); + return 0; + } + } + if(genpts){ + AVPacketList **plast_pktl= &s->packet_buffer; + int ret= av_read_frame_internal(s, pkt); + if(ret<0){ + if(pktl && ret != -EAGAIN){ + eof=1; + continue; + }else + return ret; + } + + /* duplicate the packet */ + if (av_dup_packet(pkt) < 0) + return AVERROR_NOMEM; + + while(*plast_pktl) plast_pktl= &(*plast_pktl)->next; //FIXME maybe maintain pointer to the last? + + pktl = av_mallocz(sizeof(AVPacketList)); + if (!pktl) + return AVERROR_NOMEM; + + /* add the packet in the buffered packet list */ + *plast_pktl = pktl; + pktl->pkt= *pkt; + }else{ + assert(!s->packet_buffer); + return av_read_frame_internal(s, pkt); + } + } +} + +/* XXX: suppress the packet queue */ +static void flush_packet_queue(AVFormatContext *s) +{ + AVPacketList *pktl; + + for(;;) { + pktl = s->packet_buffer; + if (!pktl) + break; + s->packet_buffer = pktl->next; + av_free_packet(&pktl->pkt); + av_free(pktl); + } +} + +/*******************************************************/ +/* seek support */ + +int av_find_default_stream_index(AVFormatContext *s) +{ + int i; + AVStream *st; + + if (s->nb_streams <= 0) + return -1; + for(i = 0; i < s->nb_streams; i++) { + st = s->streams[i]; + if (st->codec->codec_type == CODEC_TYPE_VIDEO) { + return i; + } + } + return 0; +} + +/** + * Flush the frame reader. + */ +static void av_read_frame_flush(AVFormatContext *s) +{ + AVStream *st; + int i; + + flush_packet_queue(s); + + /* free previous packet */ + if (s->cur_st) { + if (s->cur_st->parser) + av_free_packet(&s->cur_pkt); + s->cur_st = NULL; + } + /* fail safe */ + s->cur_ptr = NULL; + s->cur_len = 0; + + /* for each stream, reset read state */ + for(i = 0; i < s->nb_streams; i++) { + st = s->streams[i]; + + if (st->parser) { + av_parser_close(st->parser); + st->parser = NULL; + } + st->last_IP_pts = AV_NOPTS_VALUE; + st->cur_dts = 0; /* we set the current DTS to an unspecified origin */ + } +} + +/** + * Updates cur_dts of all streams based on given timestamp and AVStream. + * + * Stream ref_st unchanged, others set cur_dts in their native timebase + * only needed for timestamp wrapping or if (dts not set and pts!=dts) + * @param timestamp new dts expressed in time_base of param ref_st + * @param ref_st reference stream giving time_base of param timestamp + */ +void av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp){ + int i; + + for(i = 0; i < s->nb_streams; i++) { + AVStream *st = s->streams[i]; + + st->cur_dts = av_rescale(timestamp, + st->time_base.den * (int64_t)ref_st->time_base.num, + st->time_base.num * (int64_t)ref_st->time_base.den); + } +} + +/** + * Add a index entry into a sorted list updateing if it is already there. + * + * @param timestamp timestamp in the timebase of the given stream + */ +int av_add_index_entry(AVStream *st, + int64_t pos, int64_t timestamp, int size, int distance, int flags) +{ + AVIndexEntry *entries, *ie; + int index; + + if((unsigned)st->nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry)) + return -1; + + entries = av_fast_realloc(st->index_entries, + &st->index_entries_allocated_size, + (st->nb_index_entries + 1) * + sizeof(AVIndexEntry)); + if(!entries) + return -1; + + st->index_entries= entries; + + index= av_index_search_timestamp(st, timestamp, AVSEEK_FLAG_ANY); + + if(index<0){ + index= st->nb_index_entries++; + ie= &entries[index]; + assert(index==0 || ie[-1].timestamp < timestamp); + }else{ + ie= &entries[index]; + if(ie->timestamp != timestamp){ + if(ie->timestamp <= timestamp) + return -1; + memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(st->nb_index_entries - index)); + st->nb_index_entries++; + }else if(ie->pos == pos && distance < ie->min_distance) //dont reduce the distance + distance= ie->min_distance; + } + + ie->pos = pos; + ie->timestamp = timestamp; + ie->min_distance= distance; + ie->size= size; + ie->flags = flags; + + return index; +} + +/** + * build an index for raw streams using a parser. + */ +static void av_build_index_raw(AVFormatContext *s) +{ + AVPacket pkt1, *pkt = &pkt1; + int ret; + AVStream *st; + + st = s->streams[0]; + av_read_frame_flush(s); + url_fseek(&s->pb, s->data_offset, SEEK_SET); + + for(;;) { + ret = av_read_frame(s, pkt); + if (ret < 0) + break; + if (pkt->stream_index == 0 && st->parser && + (pkt->flags & PKT_FLAG_KEY)) { + av_add_index_entry(st, st->parser->frame_offset, pkt->dts, + 0, 0, AVINDEX_KEYFRAME); + } + av_free_packet(pkt); + } +} + +/** + * Returns TRUE if we deal with a raw stream. + * + * Raw codec data and parsing needed. + */ +static int is_raw_stream(AVFormatContext *s) +{ + AVStream *st; + + if (s->nb_streams != 1) + return 0; + st = s->streams[0]; + if (!st->need_parsing) + return 0; + return 1; +} + +/** + * Gets the index for a specific timestamp. + * @param flags if AVSEEK_FLAG_BACKWARD then the returned index will correspond to + * the timestamp which is <= the requested one, if backward is 0 + * then it will be >= + * if AVSEEK_FLAG_ANY seek to any frame, only keyframes otherwise + * @return < 0 if no such timestamp could be found + */ +int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp, + int flags) +{ + AVIndexEntry *entries= st->index_entries; + int nb_entries= st->nb_index_entries; + int a, b, m; + int64_t timestamp; + + a = - 1; + b = nb_entries; + + while (b - a > 1) { + m = (a + b) >> 1; + timestamp = entries[m].timestamp; + if(timestamp >= wanted_timestamp) + b = m; + if(timestamp <= wanted_timestamp) + a = m; + } + m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b; + + if(!(flags & AVSEEK_FLAG_ANY)){ + while(m>=0 && miformat; + int64_t pos_min, pos_max, pos, pos_limit; + int64_t ts_min, ts_max, ts; + int index; + AVStream *st; + + if (stream_index < 0) + return -1; + +#ifdef DEBUG_SEEK + av_log(s, AV_LOG_DEBUG, "read_seek: %d %"PRId64"\n", stream_index, target_ts); +#endif + + ts_max= + ts_min= AV_NOPTS_VALUE; + pos_limit= -1; //gcc falsely says it may be uninitalized + + st= s->streams[stream_index]; + if(st->index_entries){ + AVIndexEntry *e; + + index= av_index_search_timestamp(st, target_ts, flags | AVSEEK_FLAG_BACKWARD); //FIXME whole func must be checked for non keyframe entries in index case, especially read_timestamp() + index= FFMAX(index, 0); + e= &st->index_entries[index]; + + if(e->timestamp <= target_ts || e->pos == e->min_distance){ + pos_min= e->pos; + ts_min= e->timestamp; +#ifdef DEBUG_SEEK + av_log(s, AV_LOG_DEBUG, "using cached pos_min=0x%"PRIx64" dts_min=%"PRId64"\n", + pos_min,ts_min); +#endif + }else{ + assert(index==0); + } + + index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD); + assert(index < st->nb_index_entries); + if(index >= 0){ + e= &st->index_entries[index]; + assert(e->timestamp >= target_ts); + pos_max= e->pos; + ts_max= e->timestamp; + pos_limit= pos_max - e->min_distance; +#ifdef DEBUG_SEEK + av_log(s, AV_LOG_DEBUG, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%"PRId64"\n", + pos_max,pos_limit, ts_max); +#endif + } + } + + pos= av_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp); + if(pos<0) + return -1; + + /* do the seek */ + url_fseek(&s->pb, pos, SEEK_SET); + + av_update_cur_dts(s, st, ts); + + return 0; +} + +/** + * Does a binary search using read_timestamp(). + * this isnt supposed to be called directly by a user application, but by demuxers + * @param target_ts target timestamp in the time base of the given stream + * @param stream_index stream number + */ +int64_t av_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts, int64_t pos_min, int64_t pos_max, int64_t pos_limit, int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret, int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t )){ + int64_t pos, ts; + int64_t start_pos, filesize; + int no_change; + +#ifdef DEBUG_SEEK + av_log(s, AV_LOG_DEBUG, "gen_seek: %d %"PRId64"\n", stream_index, target_ts); +#endif + + if(ts_min == AV_NOPTS_VALUE){ + pos_min = s->data_offset; + ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX); + if (ts_min == AV_NOPTS_VALUE) + return -1; + } + + if(ts_max == AV_NOPTS_VALUE){ + int step= 1024; + filesize = url_fsize(&s->pb); + pos_max = filesize - 1; + do{ + pos_max -= step; + ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step); + step += step; + }while(ts_max == AV_NOPTS_VALUE && pos_max >= step); + if (ts_max == AV_NOPTS_VALUE) + return -1; + + for(;;){ + int64_t tmp_pos= pos_max + 1; + int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX); + if(tmp_ts == AV_NOPTS_VALUE) + break; + ts_max= tmp_ts; + pos_max= tmp_pos; + if(tmp_pos >= filesize) + break; + } + pos_limit= pos_max; + } + + if(ts_min > ts_max){ + return -1; + }else if(ts_min == ts_max){ + pos_limit= pos_min; + } + + no_change=0; + while (pos_min < pos_limit) { +#ifdef DEBUG_SEEK + av_log(s, AV_LOG_DEBUG, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%"PRId64" dts_max=%"PRId64"\n", + pos_min, pos_max, + ts_min, ts_max); +#endif + assert(pos_limit <= pos_max); + + if(no_change==0){ + int64_t approximate_keyframe_distance= pos_max - pos_limit; + // interpolate position (better than dichotomy) + pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min) + + pos_min - approximate_keyframe_distance; + }else if(no_change==1){ + // bisection, if interpolation failed to change min or max pos last time + pos = (pos_min + pos_limit)>>1; + }else{ + // linear search if bisection failed, can only happen if there are very few or no keframes between min/max + pos=pos_min; + } + if(pos <= pos_min) + pos= pos_min + 1; + else if(pos > pos_limit) + pos= pos_limit; + start_pos= pos; + + ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1 + if(pos == pos_max) + no_change++; + else + no_change=0; +#ifdef DEBUG_SEEK +av_log(s, AV_LOG_DEBUG, "%"PRId64" %"PRId64" %"PRId64" / %"PRId64" %"PRId64" %"PRId64" target:%"PRId64" limit:%"PRId64" start:%"PRId64" noc:%d\n", pos_min, pos, pos_max, ts_min, ts, ts_max, target_ts, pos_limit, start_pos, no_change); +#endif + assert(ts != AV_NOPTS_VALUE); + if (target_ts <= ts) { + pos_limit = start_pos - 1; + pos_max = pos; + ts_max = ts; + } + if (target_ts >= ts) { + pos_min = pos; + ts_min = ts; + } + } + + pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max; + ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max; +#ifdef DEBUG_SEEK + pos_min = pos; + ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX); + pos_min++; + ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX); + av_log(s, AV_LOG_DEBUG, "pos=0x%"PRIx64" %"PRId64"<=%"PRId64"<=%"PRId64"\n", + pos, ts_min, target_ts, ts_max); +#endif + *ts_ret= ts; + return pos; +} + +static int av_seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){ + int64_t pos_min, pos_max; +#if 0 + AVStream *st; + + if (stream_index < 0) + return -1; + + st= s->streams[stream_index]; +#endif + + pos_min = s->data_offset; + pos_max = url_fsize(&s->pb) - 1; + + if (pos < pos_min) pos= pos_min; + else if(pos > pos_max) pos= pos_max; + + url_fseek(&s->pb, pos, SEEK_SET); + +#if 0 + av_update_cur_dts(s, st, ts); +#endif + return 0; +} + +static int av_seek_frame_generic(AVFormatContext *s, + int stream_index, int64_t timestamp, int flags) +{ + int index; + AVStream *st; + AVIndexEntry *ie; + + if (!s->index_built) { + if (is_raw_stream(s)) { + av_build_index_raw(s); + } else { + return -1; + } + s->index_built = 1; + } + + st = s->streams[stream_index]; + index = av_index_search_timestamp(st, timestamp, flags); + if (index < 0) + return -1; + + /* now we have found the index, we can seek */ + ie = &st->index_entries[index]; + av_read_frame_flush(s); + url_fseek(&s->pb, ie->pos, SEEK_SET); + + av_update_cur_dts(s, st, ie->timestamp); + + return 0; +} + +/** + * Seek to the key frame at timestamp. + * 'timestamp' in 'stream_index'. + * @param stream_index If stream_index is (-1), a default + * stream is selected, and timestamp is automatically converted + * from AV_TIME_BASE units to the stream specific time_base. + * @param timestamp timestamp in AVStream.time_base units + * or if there is no stream specified then in AV_TIME_BASE units + * @param flags flags which select direction and seeking mode + * @return >= 0 on success + */ +int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags) +{ + int ret; + AVStream *st; + + av_read_frame_flush(s); + + if(flags & AVSEEK_FLAG_BYTE) + return av_seek_frame_byte(s, stream_index, timestamp, flags); + + if(stream_index < 0){ + stream_index= av_find_default_stream_index(s); + if(stream_index < 0) + return -1; + + st= s->streams[stream_index]; + /* timestamp for default must be expressed in AV_TIME_BASE units */ + timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num); + } + st= s->streams[stream_index]; + + /* first, we try the format specific seek */ + if (s->iformat->read_seek) + ret = s->iformat->read_seek(s, stream_index, timestamp, flags); + else + ret = -1; + if (ret >= 0) { + return 0; + } + + if(s->iformat->read_timestamp) + return av_seek_frame_binary(s, stream_index, timestamp, flags); + else + return av_seek_frame_generic(s, stream_index, timestamp, flags); +} + +/*******************************************************/ + +/** + * Returns TRUE if the stream has accurate timings in any stream. + * + * @return TRUE if the stream has accurate timings for at least one component. + */ +static int av_has_timings(AVFormatContext *ic) +{ + int i; + AVStream *st; + + for(i = 0;i < ic->nb_streams; i++) { + st = ic->streams[i]; + if (st->start_time != AV_NOPTS_VALUE && + st->duration != AV_NOPTS_VALUE) + return 1; + } + return 0; +} + +/** + * Estimate the stream timings from the one of each components. + * + * Also computes the global bitrate if possible. + */ +static void av_update_stream_timings(AVFormatContext *ic) +{ + int64_t start_time, start_time1, end_time, end_time1; + int i; + AVStream *st; + + start_time = MAXINT64; + end_time = MININT64; + for(i = 0;i < ic->nb_streams; i++) { + st = ic->streams[i]; + if (st->start_time != AV_NOPTS_VALUE) { + start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q); + if (start_time1 < start_time) + start_time = start_time1; + if (st->duration != AV_NOPTS_VALUE) { + end_time1 = start_time1 + + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q); + if (end_time1 > end_time) + end_time = end_time1; + } + } + } + if (start_time != MAXINT64) { + ic->start_time = start_time; + if (end_time != MININT64) { + ic->duration = end_time - start_time; + if (ic->file_size > 0) { + /* compute the bit rate */ + ic->bit_rate = (double)ic->file_size * 8.0 * AV_TIME_BASE / + (double)ic->duration; + } + } + } + +} + +static void fill_all_stream_timings(AVFormatContext *ic) +{ + int i; + AVStream *st; + + av_update_stream_timings(ic); + for(i = 0;i < ic->nb_streams; i++) { + st = ic->streams[i]; + if (st->start_time == AV_NOPTS_VALUE) { + if(ic->start_time != AV_NOPTS_VALUE) + st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base); + if(ic->duration != AV_NOPTS_VALUE) + st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base); + } + } +} + +static void av_estimate_timings_from_bit_rate(AVFormatContext *ic) +{ + int64_t filesize, duration; + int bit_rate, i; + AVStream *st; + + /* if bit_rate is already set, we believe it */ + if (ic->bit_rate == 0) { + bit_rate = 0; + for(i=0;inb_streams;i++) { + st = ic->streams[i]; + bit_rate += st->codec->bit_rate; + } + ic->bit_rate = bit_rate; + } + + /* if duration is already set, we believe it */ + if (ic->duration == AV_NOPTS_VALUE && + ic->bit_rate != 0 && + ic->file_size != 0) { + filesize = ic->file_size; + if (filesize > 0) { + for(i = 0; i < ic->nb_streams; i++) { + st = ic->streams[i]; + duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num); + if (st->start_time == AV_NOPTS_VALUE || + st->duration == AV_NOPTS_VALUE) { + st->start_time = 0; + st->duration = duration; + } + } + } + } +} + +#define DURATION_MAX_READ_SIZE 250000 + +/* only usable for MPEG-PS streams */ +static void av_estimate_timings_from_pts(AVFormatContext *ic) +{ + AVPacket pkt1, *pkt = &pkt1; + AVStream *st; + int read_size, i, ret; + int64_t end_time; + int64_t filesize, offset, duration; + + /* free previous packet */ + if (ic->cur_st && ic->cur_st->parser) + av_free_packet(&ic->cur_pkt); + ic->cur_st = NULL; + + /* flush packet queue */ + flush_packet_queue(ic); + + for(i=0;inb_streams;i++) { + st = ic->streams[i]; + if (st->parser) { + av_parser_close(st->parser); + st->parser= NULL; + } + } + + /* we read the first packets to get the first PTS (not fully + accurate, but it is enough now) */ + url_fseek(&ic->pb, 0, SEEK_SET); + read_size = 0; + for(;;) { + if (read_size >= DURATION_MAX_READ_SIZE) + break; + /* if all info is available, we can stop */ + for(i = 0;i < ic->nb_streams; i++) { + st = ic->streams[i]; + if (st->start_time == AV_NOPTS_VALUE) + break; + } + if (i == ic->nb_streams) + break; + + ret = av_read_packet(ic, pkt); + if (ret != 0) + break; + read_size += pkt->size; + st = ic->streams[pkt->stream_index]; + if (pkt->pts != AV_NOPTS_VALUE) { + if (st->start_time == AV_NOPTS_VALUE) + st->start_time = pkt->pts; + } + av_free_packet(pkt); + } + + /* estimate the end time (duration) */ + /* XXX: may need to support wrapping */ + filesize = ic->file_size; + offset = filesize - DURATION_MAX_READ_SIZE; + if (offset < 0) + offset = 0; + + url_fseek(&ic->pb, offset, SEEK_SET); + read_size = 0; + for(;;) { + if (read_size >= DURATION_MAX_READ_SIZE) + break; + /* if all info is available, we can stop */ + for(i = 0;i < ic->nb_streams; i++) { + st = ic->streams[i]; + if (st->duration == AV_NOPTS_VALUE) + break; + } + if (i == ic->nb_streams) + break; + + ret = av_read_packet(ic, pkt); + if (ret != 0) + break; + read_size += pkt->size; + st = ic->streams[pkt->stream_index]; + if (pkt->pts != AV_NOPTS_VALUE) { + end_time = pkt->pts; + duration = end_time - st->start_time; + if (duration > 0) { + if (st->duration == AV_NOPTS_VALUE || + st->duration < duration) + st->duration = duration; + } + } + av_free_packet(pkt); + } + + fill_all_stream_timings(ic); + + url_fseek(&ic->pb, 0, SEEK_SET); +} + +static void av_estimate_timings(AVFormatContext *ic) +{ + int64_t file_size; + + /* get the file size, if possible */ + if (ic->iformat->flags & AVFMT_NOFILE) { + file_size = 0; + } else { + file_size = url_fsize(&ic->pb); + if (file_size < 0) + file_size = 0; + } + ic->file_size = file_size; + + if ((!strcmp(ic->iformat->name, "mpeg") || + !strcmp(ic->iformat->name, "mpegts")) && + file_size && !ic->pb.is_streamed) { + /* get accurate estimate from the PTSes */ + av_estimate_timings_from_pts(ic); + } else if (av_has_timings(ic)) { + /* at least one components has timings - we use them for all + the components */ + fill_all_stream_timings(ic); + } else { + /* less precise: use bit rate info */ + av_estimate_timings_from_bit_rate(ic); + } + av_update_stream_timings(ic); + +#if 0 + { + int i; + AVStream *st; + for(i = 0;i < ic->nb_streams; i++) { + st = ic->streams[i]; + printf("%d: start_time: %0.3f duration: %0.3f\n", + i, (double)st->start_time / AV_TIME_BASE, + (double)st->duration / AV_TIME_BASE); + } + printf("stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n", + (double)ic->start_time / AV_TIME_BASE, + (double)ic->duration / AV_TIME_BASE, + ic->bit_rate / 1000); + } +#endif +} + +static int has_codec_parameters(AVCodecContext *enc) +{ + int val; + switch(enc->codec_type) { + case CODEC_TYPE_AUDIO: + val = enc->sample_rate; + break; + case CODEC_TYPE_VIDEO: + val = enc->width && enc->pix_fmt != PIX_FMT_NONE; + break; + default: + val = 1; + break; + } + return (val != 0); +} + +static int try_decode_frame(AVStream *st, const uint8_t *data, int size) +{ + int16_t *samples; + AVCodec *codec; + int got_picture, ret=0; + AVFrame picture; + + if(!st->codec->codec){ + codec = avcodec_find_decoder(st->codec->codec_id); + if (!codec) + return -1; + ret = avcodec_open(st->codec, codec); + if (ret < 0) + return ret; + } + + if(!has_codec_parameters(st->codec)){ + switch(st->codec->codec_type) { + case CODEC_TYPE_VIDEO: + ret = avcodec_decode_video(st->codec, &picture, + &got_picture, (uint8_t *)data, size); + break; + case CODEC_TYPE_AUDIO: + samples = av_malloc(AVCODEC_MAX_AUDIO_FRAME_SIZE); + if (!samples) + goto fail; + ret = avcodec_decode_audio(st->codec, samples, + &got_picture, (uint8_t *)data, size); + av_free(samples); + break; + default: + break; + } + } + fail: + return ret; +} + +/* absolute maximum size we read until we abort */ +#define MAX_READ_SIZE 5000000 + +/* maximum duration until we stop analysing the stream */ +#define MAX_STREAM_DURATION ((int)(AV_TIME_BASE * 3.0)) + +/** + * Read the beginning of a media file to get stream information. This + * is useful for file formats with no headers such as MPEG. This + * function also compute the real frame rate in case of mpeg2 repeat + * frame mode. + * + * @param ic media file handle + * @return >=0 if OK. AVERROR_xxx if error. + * @todo let user decide somehow what information is needed so we dont waste time geting stuff the user doesnt need + */ +int av_find_stream_info(AVFormatContext *ic) +{ + int i, count, ret, read_size, j; + AVStream *st; + AVPacket pkt1, *pkt; + AVPacketList *pktl=NULL, **ppktl; + int64_t last_dts[MAX_STREAMS]; + int64_t duration_sum[MAX_STREAMS]; + int duration_count[MAX_STREAMS]={0}; + + for(i=0;inb_streams;i++) { + st = ic->streams[i]; + if(st->codec->codec_type == CODEC_TYPE_VIDEO){ +/* if(!st->time_base.num) + st->time_base= */ + if(!st->codec->time_base.num) + st->codec->time_base= st->time_base; + } + //only for the split stuff + if (!st->parser) { + st->parser = av_parser_init(st->codec->codec_id); + if(st->need_parsing == 2 && st->parser){ + st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES; + } + } + } + + for(i=0;ipacket_buffer; + for(;;) { + /* check if one codec still needs to be handled */ + for(i=0;inb_streams;i++) { + st = ic->streams[i]; + if (!has_codec_parameters(st->codec)) + break; + /* variable fps and no guess at the real fps */ + if( st->codec->time_base.den >= 101LL*st->codec->time_base.num + && duration_count[i]<20 && st->codec->codec_type == CODEC_TYPE_VIDEO) + break; + if(st->parser && st->parser->parser->split && !st->codec->extradata) + break; + } + if (i == ic->nb_streams) { + /* NOTE: if the format has no header, then we need to read + some packets to get most of the streams, so we cannot + stop here */ + if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) { + /* if we found the info for all the codecs, we can stop */ + ret = count; + break; + } + } + /* we did not get all the codec info, but we read too much data */ + if (read_size >= MAX_READ_SIZE) { + ret = count; + break; + } + + /* NOTE: a new stream can be added there if no header in file + (AVFMTCTX_NOHEADER) */ + ret = av_read_frame_internal(ic, &pkt1); + if (ret < 0) { + /* EOF or error */ + ret = -1; /* we could not have all the codec parameters before EOF */ + for(i=0;inb_streams;i++) { + st = ic->streams[i]; + if (!has_codec_parameters(st->codec)){ + char buf[256]; + avcodec_string(buf, sizeof(buf), st->codec, 0); + av_log(ic, AV_LOG_INFO, "Could not find codec parameters (%s)\n", buf); + } else { + ret = 0; + } + } + break; + } + + pktl = av_mallocz(sizeof(AVPacketList)); + if (!pktl) { + ret = AVERROR_NOMEM; + break; + } + + /* add the packet in the buffered packet list */ + *ppktl = pktl; + ppktl = &pktl->next; + + pkt = &pktl->pkt; + *pkt = pkt1; + + /* duplicate the packet */ + if (av_dup_packet(pkt) < 0) { + ret = AVERROR_NOMEM; + break; + } + + read_size += pkt->size; + + st = ic->streams[pkt->stream_index]; + st->codec_info_duration += pkt->duration; + if (pkt->duration != 0) + st->codec_info_nb_frames++; + + { + int index= pkt->stream_index; + int64_t last= last_dts[index]; + int64_t duration= pkt->dts - last; + + if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && duration>0){ + if(duration*duration_count[index]*10/9 < duration_sum[index]){ + duration_sum[index]= duration; + duration_count[index]=1; + }else{ + int factor= av_rescale(2*duration, duration_count[index], duration_sum[index]); + if(factor==3) + duration_count[index] *= 2; + factor= av_rescale(duration, duration_count[index], duration_sum[index]); + duration_sum[index] += duration; + duration_count[index]+= factor; + } + if(st->codec_info_nb_frames == 0 && 0) + st->codec_info_duration += duration; + } + last_dts[pkt->stream_index]= pkt->dts; + } + if(st->parser && st->parser->parser->split && !st->codec->extradata){ + int i= st->parser->parser->split(st->codec, pkt->data, pkt->size); + if(i){ + st->codec->extradata_size= i; + st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); + memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size); + memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE); + } + } + + /* if still no information, we try to open the codec and to + decompress the frame. We try to avoid that in most cases as + it takes longer and uses more memory. For MPEG4, we need to + decompress for Quicktime. */ + if (!has_codec_parameters(st->codec) /*&& + (st->codec->codec_id == CODEC_ID_FLV1 || + st->codec->codec_id == CODEC_ID_H264 || + st->codec->codec_id == CODEC_ID_H263 || + st->codec->codec_id == CODEC_ID_H261 || + st->codec->codec_id == CODEC_ID_VORBIS || + st->codec->codec_id == CODEC_ID_MJPEG || + st->codec->codec_id == CODEC_ID_PNG || + st->codec->codec_id == CODEC_ID_PAM || + st->codec->codec_id == CODEC_ID_PGM || + st->codec->codec_id == CODEC_ID_PGMYUV || + st->codec->codec_id == CODEC_ID_PBM || + st->codec->codec_id == CODEC_ID_PPM || + st->codec->codec_id == CODEC_ID_SHORTEN || + (st->codec->codec_id == CODEC_ID_MPEG4 && !st->need_parsing))*/) + try_decode_frame(st, pkt->data, pkt->size); + + if (av_rescale_q(st->codec_info_duration, st->time_base, AV_TIME_BASE_Q) >= MAX_STREAM_DURATION) { + break; + } + count++; + } + + // close codecs which where opened in try_decode_frame() + for(i=0;inb_streams;i++) { + st = ic->streams[i]; + if(st->codec->codec) + avcodec_close(st->codec); + } + for(i=0;inb_streams;i++) { + st = ic->streams[i]; + if (st->codec->codec_type == CODEC_TYPE_VIDEO) { + if(st->codec->codec_id == CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_sample) + st->codec->codec_tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt); + + if(duration_count[i] + && (st->codec->time_base.num*101LL <= st->codec->time_base.den || st->codec->codec_id == CODEC_ID_MPEG2VIDEO) && + //FIXME we should not special case mpeg2, but this needs testing with non mpeg2 ... + st->time_base.num*duration_sum[i]/duration_count[i]*101LL > st->time_base.den){ + int64_t num, den, error, best_error; + + num= st->time_base.den*duration_count[i]; + den= st->time_base.num*duration_sum[i]; + + best_error= INT64_MAX; + for(j=1; j<60*12; j++){ + error= FFABS(1001*12*num - 1001*j*den); + if(error < best_error){ + best_error= error; + av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, j, 12, INT_MAX); + } + } + for(j=0; j<3; j++){ + static const int ticks[]= {24,30,60}; + error= FFABS(1001*12*num - 1000*12*den * ticks[j]); + if(error < best_error){ + best_error= error; + av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, ticks[j]*1000, 1001, INT_MAX); + } + } + } + + if (!st->r_frame_rate.num){ + if( st->codec->time_base.den * (int64_t)st->time_base.num + <= st->codec->time_base.num * (int64_t)st->time_base.den){ + st->r_frame_rate.num = st->codec->time_base.den; + st->r_frame_rate.den = st->codec->time_base.num; + }else{ + st->r_frame_rate.num = st->time_base.den; + st->r_frame_rate.den = st->time_base.num; + } + } + } + } + + av_estimate_timings(ic); +#if 0 + /* correct DTS for b frame streams with no timestamps */ + for(i=0;inb_streams;i++) { + st = ic->streams[i]; + if (st->codec->codec_type == CODEC_TYPE_VIDEO) { + if(b-frames){ + ppktl = &ic->packet_buffer; + while(ppkt1){ + if(ppkt1->stream_index != i) + continue; + if(ppkt1->pkt->dts < 0) + break; + if(ppkt1->pkt->pts != AV_NOPTS_VALUE) + break; + ppkt1->pkt->dts -= delta; + ppkt1= ppkt1->next; + } + if(ppkt1) + continue; + st->cur_dts -= delta; + } + } + } +#endif + return ret; +} + +/*******************************************************/ + +/** + * start playing a network based stream (e.g. RTSP stream) at the + * current position + */ +int av_read_play(AVFormatContext *s) +{ + if (!s->iformat->read_play) + return AVERROR_NOTSUPP; + return s->iformat->read_play(s); +} + +/** + * Pause a network based stream (e.g. RTSP stream). + * + * Use av_read_play() to resume it. + */ +int av_read_pause(AVFormatContext *s) +{ + if (!s->iformat->read_pause) + return AVERROR_NOTSUPP; + return s->iformat->read_pause(s); +} + +/** + * Close a media file (but not its codecs). + * + * @param s media file handle + */ +void av_close_input_file(AVFormatContext *s) +{ + int i, must_open_file; + AVStream *st; + + /* free previous packet */ + if (s->cur_st && s->cur_st->parser) + av_free_packet(&s->cur_pkt); + + if (s->iformat->read_close) + s->iformat->read_close(s); + for(i=0;inb_streams;i++) { + /* free all data in a stream component */ + st = s->streams[i]; + if (st->parser) { + av_parser_close(st->parser); + } + av_free(st->index_entries); + av_free(st->codec->extradata); + av_free(st->codec); + av_free(st); + } + flush_packet_queue(s); + must_open_file = 1; + if (s->iformat->flags & AVFMT_NOFILE) { + must_open_file = 0; + } + if (must_open_file) { + url_fclose(&s->pb); + } + av_freep(&s->priv_data); + av_free(s); +} + +/** + * Add a new stream to a media file. + * + * Can only be called in the read_header() function. If the flag + * AVFMTCTX_NOHEADER is in the format context, then new streams + * can be added in read_packet too. + * + * @param s media file handle + * @param id file format dependent stream id + */ +AVStream *av_new_stream(AVFormatContext *s, int id) +{ + AVStream *st; + int i; + + if (s->nb_streams >= MAX_STREAMS) + return NULL; + + st = av_mallocz(sizeof(AVStream)); + if (!st) + return NULL; + + st->codec= avcodec_alloc_context(); + if (s->iformat) { + /* no default bitrate if decoding */ + st->codec->bit_rate = 0; + } + st->index = s->nb_streams; + st->id = id; + st->start_time = AV_NOPTS_VALUE; + st->duration = AV_NOPTS_VALUE; + st->cur_dts = AV_NOPTS_VALUE; + + /* default pts settings is MPEG like */ + av_set_pts_info(st, 33, 1, 90000); + st->last_IP_pts = AV_NOPTS_VALUE; + for(i=0; ipts_buffer[i]= AV_NOPTS_VALUE; + + s->streams[s->nb_streams++] = st; + return st; +} + +/************************************************************/ +/* output media file */ + +int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap) +{ + int ret; + + if (s->oformat->priv_data_size > 0) { + s->priv_data = av_mallocz(s->oformat->priv_data_size); + if (!s->priv_data) + return AVERROR_NOMEM; + } else + s->priv_data = NULL; + + if (s->oformat->set_parameters) { + ret = s->oformat->set_parameters(s, ap); + if (ret < 0) + return ret; + } + return 0; +} + +/** + * allocate the stream private data and write the stream header to an + * output media file + * + * @param s media file handle + * @return 0 if OK. AVERROR_xxx if error. + */ +int av_write_header(AVFormatContext *s) +{ + int ret, i; + AVStream *st; + + // some sanity checks + for(i=0;inb_streams;i++) { + st = s->streams[i]; + + switch (st->codec->codec_type) { + case CODEC_TYPE_AUDIO: + if(st->codec->sample_rate<=0){ + av_log(s, AV_LOG_ERROR, "sample rate not set\n"); + return -1; + } + break; + case CODEC_TYPE_VIDEO: + if(st->codec->time_base.num<=0 || st->codec->time_base.den<=0){ //FIXME audio too? + av_log(s, AV_LOG_ERROR, "time base not set\n"); + return -1; + } + if(st->codec->width<=0 || st->codec->height<=0){ + av_log(s, AV_LOG_ERROR, "dimensions not set\n"); + return -1; + } + break; + } + } + + if(s->oformat->write_header){ + ret = s->oformat->write_header(s); + if (ret < 0) + return ret; + } + + /* init PTS generation */ + for(i=0;inb_streams;i++) { + int64_t den = AV_NOPTS_VALUE; + st = s->streams[i]; + + switch (st->codec->codec_type) { + case CODEC_TYPE_AUDIO: + den = (int64_t)st->time_base.num * st->codec->sample_rate; + break; + case CODEC_TYPE_VIDEO: + den = (int64_t)st->time_base.num * st->codec->time_base.den; + break; + default: + break; + } + if (den != AV_NOPTS_VALUE) { + if (den <= 0) + return AVERROR_INVALIDDATA; + av_frac_init(&st->pts, 0, 0, den); + } + } + return 0; +} + +//FIXME merge with compute_pkt_fields +static int compute_pkt_fields2(AVStream *st, AVPacket *pkt){ + int delay = FFMAX(st->codec->has_b_frames, !!st->codec->max_b_frames); + int num, den, frame_size, i; + +// av_log(st->codec, AV_LOG_DEBUG, "av_write_frame: pts:%"PRId64" dts:%"PRId64" cur_dts:%"PRId64" b:%d size:%d st:%d\n", pkt->pts, pkt->dts, st->cur_dts, delay, pkt->size, pkt->stream_index); + +/* if(pkt->pts == AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE) + return -1;*/ + + /* duration field */ + if (pkt->duration == 0) { + compute_frame_duration(&num, &den, st, NULL, pkt); + if (den && num) { + pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num); + } + } + + //XXX/FIXME this is a temporary hack until all encoders output pts + if((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay){ + pkt->dts= +// pkt->pts= st->cur_dts; + pkt->pts= st->pts.val; + } + + //calculate dts from pts + if(pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE){ + st->pts_buffer[0]= pkt->pts; + for(i=1; ipts_buffer[i] == AV_NOPTS_VALUE; i++) + st->pts_buffer[i]= (i-delay-1) * pkt->duration; + for(i=0; ipts_buffer[i] > st->pts_buffer[i+1]; i++) + FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]); + + pkt->dts= st->pts_buffer[0]; + } + + if(st->cur_dts && st->cur_dts != AV_NOPTS_VALUE && st->cur_dts >= pkt->dts){ + av_log(NULL, AV_LOG_ERROR, "error, non monotone timestamps %"PRId64" >= %"PRId64"\n", st->cur_dts, pkt->dts); + return -1; + } + if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts){ + av_log(NULL, AV_LOG_ERROR, "error, pts < dts\n"); + return -1; + } + +// av_log(NULL, AV_LOG_DEBUG, "av_write_frame: pts2:%"PRId64" dts2:%"PRId64"\n", pkt->pts, pkt->dts); + st->cur_dts= pkt->dts; + st->pts.val= pkt->dts; + + /* update pts */ + switch (st->codec->codec_type) { + case CODEC_TYPE_AUDIO: + frame_size = get_audio_frame_size(st->codec, pkt->size); + + /* HACK/FIXME, we skip the initial 0-size packets as they are most likely equal to the encoder delay, + but it would be better if we had the real timestamps from the encoder */ + if (frame_size >= 0 && (pkt->size || st->pts.num!=st->pts.den>>1 || st->pts.val)) { + av_frac_add(&st->pts, (int64_t)st->time_base.den * frame_size); + } + break; + case CODEC_TYPE_VIDEO: + av_frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num); + break; + default: + break; + } + return 0; +} + +static void truncate_ts(AVStream *st, AVPacket *pkt){ + int64_t pts_mask = (2LL << (st->pts_wrap_bits-1)) - 1; + +// if(pkt->dts < 0) +// pkt->dts= 0; //this happens for low_delay=0 and b frames, FIXME, needs further invstigation about what we should do here + + pkt->pts &= pts_mask; + pkt->dts &= pts_mask; +} + +/** + * Write a packet to an output media file. + * + * The packet shall contain one audio or video frame. + * + * @param s media file handle + * @param pkt the packet, which contains the stream_index, buf/buf_size, dts/pts, ... + * @return < 0 if error, = 0 if OK, 1 if end of stream wanted. + */ +int av_write_frame(AVFormatContext *s, AVPacket *pkt) +{ + int ret; + + ret=compute_pkt_fields2(s->streams[pkt->stream_index], pkt); + if(ret<0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) + return ret; + + truncate_ts(s->streams[pkt->stream_index], pkt); + + ret= s->oformat->write_packet(s, pkt); + if(!ret) + ret= url_ferror(&s->pb); + return ret; +} + +/** + * Interleave a packet per DTS in an output media file. + * + * Packets with pkt->destruct == av_destruct_packet will be freed inside this function, + * so they cannot be used after it, note calling av_free_packet() on them is still safe. + * + * @param s media file handle + * @param out the interleaved packet will be output here + * @param in the input packet + * @param flush 1 if no further packets are available as input and all + * remaining packets should be output + * @return 1 if a packet was output, 0 if no packet could be output, + * < 0 if an error occured + */ +int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush){ + AVPacketList *pktl, **next_point, *this_pktl; + int stream_count=0; + int streams[MAX_STREAMS]; + + if(pkt){ + AVStream *st= s->streams[ pkt->stream_index]; + +// assert(pkt->destruct != av_destruct_packet); //FIXME + + this_pktl = av_mallocz(sizeof(AVPacketList)); + this_pktl->pkt= *pkt; + if(pkt->destruct == av_destruct_packet) + pkt->destruct= NULL; // non shared -> must keep original from being freed + else + av_dup_packet(&this_pktl->pkt); //shared -> must dup + + next_point = &s->packet_buffer; + while(*next_point){ + AVStream *st2= s->streams[ (*next_point)->pkt.stream_index]; + int64_t left= st2->time_base.num * (int64_t)st ->time_base.den; + int64_t right= st ->time_base.num * (int64_t)st2->time_base.den; + if((*next_point)->pkt.dts * left > pkt->dts * right) //FIXME this can overflow + break; + next_point= &(*next_point)->next; + } + this_pktl->next= *next_point; + *next_point= this_pktl; + } + + memset(streams, 0, sizeof(streams)); + pktl= s->packet_buffer; + while(pktl){ +//av_log(s, AV_LOG_DEBUG, "show st:%d dts:%"PRId64"\n", pktl->pkt.stream_index, pktl->pkt.dts); + if(streams[ pktl->pkt.stream_index ] == 0) + stream_count++; + streams[ pktl->pkt.stream_index ]++; + pktl= pktl->next; + } + + if(s->nb_streams == stream_count || (flush && stream_count)){ + pktl= s->packet_buffer; + *out= pktl->pkt; + + s->packet_buffer= pktl->next; + av_freep(&pktl); + return 1; + }else{ + av_init_packet(out); + return 0; + } +} + +/** + * Interleaves a AVPacket correctly so it can be muxed. + * @param out the interleaved packet will be output here + * @param in the input packet + * @param flush 1 if no further packets are available as input and all + * remaining packets should be output + * @return 1 if a packet was output, 0 if no packet could be output, + * < 0 if an error occured + */ +static int av_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush){ + if(s->oformat->interleave_packet) + return s->oformat->interleave_packet(s, out, in, flush); + else + return av_interleave_packet_per_dts(s, out, in, flush); +} + +/** + * Writes a packet to an output media file ensuring correct interleaving. + * + * The packet must contain one audio or video frame. + * If the packets are already correctly interleaved the application should + * call av_write_frame() instead as its slightly faster, its also important + * to keep in mind that completly non interleaved input will need huge amounts + * of memory to interleave with this, so its prefereable to interleave at the + * demuxer level + * + * @param s media file handle + * @param pkt the packet, which contains the stream_index, buf/buf_size, dts/pts, ... + * @return < 0 if error, = 0 if OK, 1 if end of stream wanted. + */ +int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){ + AVStream *st= s->streams[ pkt->stream_index]; + + //FIXME/XXX/HACK drop zero sized packets + if(st->codec->codec_type == CODEC_TYPE_AUDIO && pkt->size==0) + return 0; + +//av_log(NULL, AV_LOG_DEBUG, "av_interleaved_write_frame %d %"PRId64" %"PRId64"\n", pkt->size, pkt->dts, pkt->pts); + if(compute_pkt_fields2(st, pkt) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) + return -1; + + if(pkt->dts == AV_NOPTS_VALUE) + return -1; + + for(;;){ + AVPacket opkt; + int ret= av_interleave_packet(s, &opkt, pkt, 0); + if(ret<=0) //FIXME cleanup needed for ret<0 ? + return ret; + + truncate_ts(s->streams[opkt.stream_index], &opkt); + ret= s->oformat->write_packet(s, &opkt); + + av_free_packet(&opkt); + pkt= NULL; + + if(ret<0) + return ret; + if(url_ferror(&s->pb)) + return url_ferror(&s->pb); + } +} + +/** + * @brief Write the stream trailer to an output media file and + * free the file private data. + * + * @param s media file handle + * @return 0 if OK. AVERROR_xxx if error. + */ +int av_write_trailer(AVFormatContext *s) +{ + int ret, i; + + for(;;){ + AVPacket pkt; + ret= av_interleave_packet(s, &pkt, NULL, 1); + if(ret<0) //FIXME cleanup needed for ret<0 ? + goto fail; + if(!ret) + break; + + truncate_ts(s->streams[pkt.stream_index], &pkt); + ret= s->oformat->write_packet(s, &pkt); + + av_free_packet(&pkt); + + if(ret<0) + goto fail; + if(url_ferror(&s->pb)) + goto fail; + } + + if(s->oformat->write_trailer) + ret = s->oformat->write_trailer(s); +fail: + if(ret == 0) + ret=url_ferror(&s->pb); + for(i=0;inb_streams;i++) + av_freep(&s->streams[i]->priv_data); + av_freep(&s->priv_data); + return ret; +} + +/* "user interface" functions */ + +void dump_format(AVFormatContext *ic, + int index, + const char *url, + int is_output) +{ + int i, flags; + char buf[256]; + + av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n", + is_output ? "Output" : "Input", + index, + is_output ? ic->oformat->name : ic->iformat->name, + is_output ? "to" : "from", url); + if (!is_output) { + av_log(NULL, AV_LOG_INFO, " Duration: "); + if (ic->duration != AV_NOPTS_VALUE) { + int hours, mins, secs, us; + secs = ic->duration / AV_TIME_BASE; + us = ic->duration % AV_TIME_BASE; + mins = secs / 60; + secs %= 60; + hours = mins / 60; + mins %= 60; + av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%01d", hours, mins, secs, + (10 * us) / AV_TIME_BASE); + } else { + av_log(NULL, AV_LOG_INFO, "N/A"); + } + if (ic->start_time != AV_NOPTS_VALUE) { + int secs, us; + av_log(NULL, AV_LOG_INFO, ", start: "); + secs = ic->start_time / AV_TIME_BASE; + us = ic->start_time % AV_TIME_BASE; + av_log(NULL, AV_LOG_INFO, "%d.%06d", + secs, (int)av_rescale(us, 1000000, AV_TIME_BASE)); + } + av_log(NULL, AV_LOG_INFO, ", bitrate: "); + if (ic->bit_rate) { + av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000); + } else { + av_log(NULL, AV_LOG_INFO, "N/A"); + } + av_log(NULL, AV_LOG_INFO, "\n"); + } + for(i=0;inb_streams;i++) { + AVStream *st = ic->streams[i]; + int g= ff_gcd(st->time_base.num, st->time_base.den); + avcodec_string(buf, sizeof(buf), st->codec, is_output); + av_log(NULL, AV_LOG_INFO, " Stream #%d.%d", index, i); + /* the pid is an important information, so we display it */ + /* XXX: add a generic system */ + if (is_output) + flags = ic->oformat->flags; + else + flags = ic->iformat->flags; + if (flags & AVFMT_SHOW_IDS) { + av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id); + } + if (strlen(st->language) > 0) { + av_log(NULL, AV_LOG_INFO, "(%s)", st->language); + } + av_log(NULL, AV_LOG_DEBUG, ", %d/%d", st->time_base.num/g, st->time_base.den/g); + av_log(NULL, AV_LOG_INFO, ": %s", buf); + if(st->codec->codec_type == CODEC_TYPE_VIDEO){ + if(st->r_frame_rate.den && st->r_frame_rate.num) + av_log(NULL, AV_LOG_INFO, ", %5.2f fps(r)", av_q2d(st->r_frame_rate)); +/* else if(st->time_base.den && st->time_base.num) + av_log(NULL, AV_LOG_INFO, ", %5.2f fps(m)", 1/av_q2d(st->time_base));*/ + else + av_log(NULL, AV_LOG_INFO, ", %5.2f fps(c)", 1/av_q2d(st->codec->time_base)); + } + av_log(NULL, AV_LOG_INFO, "\n"); + } +} + +typedef struct { + const char *abv; + int width, height; + int frame_rate, frame_rate_base; +} AbvEntry; + +static AbvEntry frame_abvs[] = { + { "ntsc", 720, 480, 30000, 1001 }, + { "pal", 720, 576, 25, 1 }, + { "qntsc", 352, 240, 30000, 1001 }, /* VCD compliant ntsc */ + { "qpal", 352, 288, 25, 1 }, /* VCD compliant pal */ + { "sntsc", 640, 480, 30000, 1001 }, /* square pixel ntsc */ + { "spal", 768, 576, 25, 1 }, /* square pixel pal */ + { "film", 352, 240, 24, 1 }, + { "ntsc-film", 352, 240, 24000, 1001 }, + { "sqcif", 128, 96, 0, 0 }, + { "qcif", 176, 144, 0, 0 }, + { "cif", 352, 288, 0, 0 }, + { "4cif", 704, 576, 0, 0 }, +}; + +/** + * parses width and height out of string str. + */ +int parse_image_size(int *width_ptr, int *height_ptr, const char *str) +{ + int i; + int n = sizeof(frame_abvs) / sizeof(AbvEntry); + const char *p; + int frame_width = 0, frame_height = 0; + + for(i=0;i 0) + lastch = datestr[len - 1]; + else + lastch = '\0'; + is_utc = (lastch == 'z' || lastch == 'Z'); + + memset(&dt, 0, sizeof(dt)); + + p = datestr; + q = NULL; + if (!duration) { + for (i = 0; i < sizeof(date_fmt) / sizeof(date_fmt[0]); i++) { + q = small_strptime(p, date_fmt[i], &dt); + if (q) { + break; + } + } + + if (!q) { + if (is_utc) { + dt = *gmtime(&now); + } else { + dt = *localtime(&now); + } + dt.tm_hour = dt.tm_min = dt.tm_sec = 0; + } else { + p = q; + } + + if (*p == 'T' || *p == 't' || *p == ' ') + p++; + + for (i = 0; i < sizeof(time_fmt) / sizeof(time_fmt[0]); i++) { + q = small_strptime(p, time_fmt[i], &dt); + if (q) { + break; + } + } + } else { + if (p[0] == '-') { + negative = 1; + ++p; + } + q = small_strptime(p, time_fmt[0], &dt); + if (!q) { + dt.tm_sec = strtol(p, (char **)&q, 10); + dt.tm_min = 0; + dt.tm_hour = 0; + } + } + + /* Now we have all the fields that we can get */ + if (!q) { + if (duration) + return 0; + else + return now * int64_t_C(1000000); + } + + if (duration) { + t = dt.tm_hour * 3600 + dt.tm_min * 60 + dt.tm_sec; + } else { + dt.tm_isdst = -1; /* unknown */ + if (is_utc) { + t = mktimegm(&dt); + } else { + t = mktime(&dt); + } + } + + t *= 1000000; + + if (*q == '.') { + int val, n; + q++; + for (val = 0, n = 100000; n >= 1; n /= 10, q++) { + if (!isdigit(*q)) + break; + val += n * (*q - '0'); + } + t += val; + } + return negative ? -t : t; +} +#endif /* CONFIG_WINCE */ + +/** + * Attempts to find a specific tag in a URL. + * + * syntax: '?tag1=val1&tag2=val2...'. Little URL decoding is done. + * Return 1 if found. + */ +int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info) +{ + const char *p; + char tag[128], *q; + + p = info; + if (*p == '?') + p++; + for(;;) { + q = tag; + while (*p != '\0' && *p != '=' && *p != '&') { + if ((q - tag) < sizeof(tag) - 1) + *q++ = *p; + p++; + } + *q = '\0'; + q = arg; + if (*p == '=') { + p++; + while (*p != '&' && *p != '\0') { + if ((q - arg) < arg_size - 1) { + if (*p == '+') + *q++ = ' '; + else + *q++ = *p; + } + p++; + } + *q = '\0'; + } + if (!strcmp(tag, tag1)) + return 1; + if (*p != '&') + break; + p++; + } + return 0; +} + +/** + * Returns in 'buf' the path with '%d' replaced by number. + + * Also handles the '%0nd' format where 'n' is the total number + * of digits and '%%'. + * + * @param buf destination buffer + * @param buf_size destination buffer size + * @param path numbered sequence string + * @number frame number + * @return 0 if OK, -1 if format error. + */ +int av_get_frame_filename(char *buf, int buf_size, + const char *path, int number) +{ + const char *p; + char *q, buf1[20], c; + int nd, len, percentd_found; + + q = buf; + p = path; + percentd_found = 0; + for(;;) { + c = *p++; + if (c == '\0') + break; + if (c == '%') { + do { + nd = 0; + while (isdigit(*p)) { + nd = nd * 10 + *p++ - '0'; + } + c = *p++; + } while (isdigit(c)); + + switch(c) { + case '%': + goto addchar; + case 'd': + if (percentd_found) + goto fail; + percentd_found = 1; + snprintf(buf1, sizeof(buf1), "%0*d", nd, number); + len = strlen(buf1); + if ((q - buf + len) > buf_size - 1) + goto fail; + memcpy(q, buf1, len); + q += len; + break; + default: + goto fail; + } + } else { + addchar: + if ((q - buf) < buf_size - 1) + *q++ = c; + } + } + if (!percentd_found) + goto fail; + *q = '\0'; + return 0; + fail: + *q = '\0'; + return -1; +} + +/** + * Print nice hexa dump of a buffer + * @param f stream for output + * @param buf buffer + * @param size buffer size + */ +void av_hex_dump(FILE *f, uint8_t *buf, int size) +{ + int len, i, j, c; + + for(i=0;i 16) + len = 16; + fprintf(f, "%08x ", i); + for(j=0;j<16;j++) { + if (j < len) + fprintf(f, " %02x", buf[i+j]); + else + fprintf(f, " "); + } + fprintf(f, " "); + for(j=0;j '~') + c = '.'; + fprintf(f, "%c", c); + } + fprintf(f, "\n"); + } +} + +/** + * Print on 'f' a nice dump of a packet + * @param f stream for output + * @param pkt packet to dump + * @param dump_payload true if the payload must be displayed too + */ + //FIXME needs to know the time_base +void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload) +{ + fprintf(f, "stream #%d:\n", pkt->stream_index); + fprintf(f, " keyframe=%d\n", ((pkt->flags & PKT_FLAG_KEY) != 0)); + fprintf(f, " duration=%0.3f\n", (double)pkt->duration / AV_TIME_BASE); + /* DTS is _always_ valid after av_read_frame() */ + fprintf(f, " dts="); + if (pkt->dts == AV_NOPTS_VALUE) + fprintf(f, "N/A"); + else + fprintf(f, "%0.3f", (double)pkt->dts / AV_TIME_BASE); + /* PTS may be not known if B frames are present */ + fprintf(f, " pts="); + if (pkt->pts == AV_NOPTS_VALUE) + fprintf(f, "N/A"); + else + fprintf(f, "%0.3f", (double)pkt->pts / AV_TIME_BASE); + fprintf(f, "\n"); + fprintf(f, " size=%d\n", pkt->size); + if (dump_payload) + av_hex_dump(f, pkt->data, pkt->size); +} + +void url_split(char *proto, int proto_size, + char *authorization, int authorization_size, + char *hostname, int hostname_size, + int *port_ptr, + char *path, int path_size, + const char *url) +{ + const char *p; + char *q; + int port; + + port = -1; + + p = url; + q = proto; + while (*p != ':' && *p != '\0') { + if ((q - proto) < proto_size - 1) + *q++ = *p; + p++; + } + if (proto_size > 0) + *q = '\0'; + if (authorization_size > 0) + authorization[0] = '\0'; + if (*p == '\0') { + if (proto_size > 0) + proto[0] = '\0'; + if (hostname_size > 0) + hostname[0] = '\0'; + p = url; + } else { + char *at,*slash; // PETR: position of '@' character and '/' character + + p++; + if (*p == '/') + p++; + if (*p == '/') + p++; + at = strchr(p,'@'); // PETR: get the position of '@' + slash = strchr(p,'/'); // PETR: get position of '/' - end of hostname + if (at && slash && at > slash) at = NULL; // PETR: not interested in '@' behind '/' + + q = at ? authorization : hostname; // PETR: if '@' exists starting with auth. + + while ((at || *p != ':') && *p != '/' && *p != '?' && *p != '\0') { // PETR: + if (*p == '@') { // PETR: passed '@' + if (authorization_size > 0) + *q = '\0'; + q = hostname; + at = NULL; + } else if (!at) { // PETR: hostname + if ((q - hostname) < hostname_size - 1) + *q++ = *p; + } else { + if ((q - authorization) < authorization_size - 1) + *q++ = *p; + } + p++; + } + if (hostname_size > 0) + *q = '\0'; + if (*p == ':') { + p++; + port = strtoul(p, (char **)&p, 10); + } + } + if (port_ptr) + *port_ptr = port; + pstrcpy(path, path_size, p); +} + +/** + * Set the pts for a given stream. + * + * @param s stream + * @param pts_wrap_bits number of bits effectively used by the pts + * (used for wrap control, 33 is the value for MPEG) + * @param pts_num numerator to convert to seconds (MPEG: 1) + * @param pts_den denominator to convert to seconds (MPEG: 90000) + */ +void av_set_pts_info(AVStream *s, int pts_wrap_bits, + int pts_num, int pts_den) +{ + s->pts_wrap_bits = pts_wrap_bits; + s->time_base.num = pts_num; + s->time_base.den = pts_den; +} + +/* fraction handling */ + +/** + * f = val + (num / den) + 0.5. + * + * 'num' is normalized so that it is such as 0 <= num < den. + * + * @param f fractional number + * @param val integer value + * @param num must be >= 0 + * @param den must be >= 1 + */ +static void av_frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den) +{ + num += (den >> 1); + if (num >= den) { + val += num / den; + num = num % den; + } + f->val = val; + f->num = num; + f->den = den; +} + +/** + * Set f to (val + 0.5). + */ +static void av_frac_set(AVFrac *f, int64_t val) +{ + f->val = val; + f->num = f->den >> 1; +} + +/** + * Fractionnal addition to f: f = f + (incr / f->den). + * + * @param f fractional number + * @param incr increment, can be positive or negative + */ +static void av_frac_add(AVFrac *f, int64_t incr) +{ + int64_t num, den; + + num = f->num + incr; + den = f->den; + if (num < 0) { + f->val += num / den; + num = num % den; + if (num < 0) { + num += den; + f->val--; + } + } else if (num >= den) { + f->val += num / den; + num = num % den; + } + f->num = num; +} -- cgit v1.2.3