/* * Copyright (C) 2004 Michael Niedermayer * * This file is part of mpv. * * mpv 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. * * mpv 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 mpv. If not, see . */ #include #include #include #include #include #include #include #include "config.h" #include #include #include #include #include #include #include #include #include "common/msg.h" #include "common/tags.h" #include "common/av_common.h" #include "misc/bstr.h" #include "misc/charset_conv.h" #include "misc/thread_tools.h" #include "stream/stream.h" #include "demux.h" #include "stheader.h" #include "options/m_config.h" #include "options/m_option.h" #include "options/path.h" #ifndef AV_DISPOSITION_TIMED_THUMBNAILS #define AV_DISPOSITION_TIMED_THUMBNAILS 0 #endif #ifndef AV_DISPOSITION_STILL_IMAGE #define AV_DISPOSITION_STILL_IMAGE 0 #endif #define INITIAL_PROBE_SIZE STREAM_BUFFER_SIZE #define PROBE_BUF_SIZE (10 * 1024 * 1024) // Should correspond to IO_BUFFER_SIZE in libavformat/aviobuf.c (not public) // libavformat (almost) always reads data in blocks of this size. #define BIO_BUFFER_SIZE 32768 #define OPT_BASE_STRUCT struct demux_lavf_opts struct demux_lavf_opts { int probesize; int probeinfo; int probescore; float analyzeduration; int buffersize; int allow_mimetype; char *format; char **avopts; int hacks; char *sub_cp; int rtsp_transport; int linearize_ts; }; const struct m_sub_options demux_lavf_conf = { .opts = (const m_option_t[]) { OPT_INTRANGE("demuxer-lavf-probesize", probesize, 0, 32, INT_MAX), OPT_CHOICE("demuxer-lavf-probe-info", probeinfo, 0, ({"no", 0}, {"yes", 1}, {"auto", -1}, {"nostreams", -2})), OPT_STRING("demuxer-lavf-format", format, 0), OPT_FLOATRANGE("demuxer-lavf-analyzeduration", analyzeduration, 0, 0, 3600), OPT_INTRANGE("demuxer-lavf-buffersize", buffersize, 0, 1, 10 * 1024 * 1024, OPTDEF_INT(BIO_BUFFER_SIZE)), OPT_FLAG("demuxer-lavf-allow-mimetype", allow_mimetype, 0), OPT_INTRANGE("demuxer-lavf-probescore", probescore, 0, 1, AVPROBE_SCORE_MAX), OPT_FLAG("demuxer-lavf-hacks", hacks, 0), OPT_KEYVALUELIST("demuxer-lavf-o", avopts, 0), OPT_STRING("sub-codepage", sub_cp, 0), OPT_CHOICE("rtsp-transport", rtsp_transport, 0, ({"lavf", 0}, {"udp", 1}, {"tcp", 2}, {"http", 3})), OPT_CHOICE("demuxer-lavf-linearize-timestamps", linearize_ts, 0, ({"no", 0}, {"auto", -1}, {"yes", 1})), {0} }, .size = sizeof(struct demux_lavf_opts), .defaults = &(const struct demux_lavf_opts){ .probeinfo = -1, .allow_mimetype = 1, .hacks = 1, // AVPROBE_SCORE_MAX/4 + 1 is the "recommended" limit. Below that, the // user is supposed to retry with larger probe sizes until a higher // value is reached. .probescore = AVPROBE_SCORE_MAX/4 + 1, .sub_cp = "auto", .rtsp_transport = 2, .linearize_ts = -1, }, }; struct format_hack { const char *ff_name; const char *mime_type; int probescore; float analyzeduration; bool skipinfo : 1; // skip avformat_find_stream_info() unsigned int if_flags; // additional AVInputFormat.flags flags bool max_probe : 1; // use probescore only if max. probe size reached bool ignore : 1; // blacklisted bool no_stream : 1; // do not wrap struct stream as AVIOContext bool use_stream_ids : 1; // export the native stream IDs bool fully_read : 1; // set demuxer.fully_read flag bool detect_charset : 1; // format is a small text file, possibly not UTF8 bool image_format : 1; // expected to contain exactly 1 frame // Do not confuse player's position estimation (position is into external // segment, with e.g. HLS, player knows about the playlist main file only). bool clear_filepos : 1; bool linearize_audio_ts : 1;// compensate timestamp resets (audio only) bool fix_editlists : 1; bool is_network : 1; bool no_seek : 1; bool no_pcm_seek : 1; }; #define BLACKLIST(fmt) {fmt, .ignore = true} #define TEXTSUB(fmt) {fmt, .fully_read = true, .detect_charset = true} #define TEXTSUB_UTF8(fmt) {fmt, .fully_read = true} static const struct format_hack format_hacks[] = { // for webradios {"aac", "audio/aacp", 25, 0.5}, {"aac", "audio/aac", 25, 0.5}, // some mp3 files don't detect correctly (usually id3v2 too large) {"mp3", "audio/mpeg", 24, 0.5}, {"mp3", NULL, 24, .max_probe = true}, {"hls", .no_stream = true, .clear_filepos = true}, {"dash", .no_stream = true, .clear_filepos = true}, {"sdp", .clear_filepos = true, .is_network = true, .no_seek = true}, {"mpeg", .use_stream_ids = true}, {"mpegts", .use_stream_ids = true}, {"mp4", .skipinfo = true, .fix_editlists = true, .no_pcm_seek = true}, {"matroska", .skipinfo = true, .no_pcm_seek = true}, {"v4l2", .no_seek = true}, // In theory, such streams might contain timestamps, but virtually none do. {"h264", .if_flags = AVFMT_NOTIMESTAMPS }, {"hevc", .if_flags = AVFMT_NOTIMESTAMPS }, // Some Ogg shoutcast streams are essentially concatenated OGG files. They // reset timestamps, which causes all sorts of problems. {"ogg", .linearize_audio_ts = true}, TEXTSUB("aqtitle"), TEXTSUB("jacosub"), TEXTSUB("microdvd"), TEXTSUB("mpl2"), TEXTSUB("mpsub"), TEXTSUB("pjs"), TEXTSUB("realtext"), TEXTSUB("sami"), TEXTSUB("srt"), TEXTSUB("stl"), TEXTSUB("subviewer"), TEXTSUB("subviewer1"), TEXTSUB("vplayer"), TEXTSUB("ass"), TEXTSUB_UTF8("webvtt"), // Useless non-sense, sometimes breaks MLP2 subreader.c fallback BLACKLIST("tty"), // Let's open files with extremely generic extensions (.bin) with a // demuxer that doesn't have a probe function! NO. BLACKLIST("bin"), // Useless, does not work with custom streams. BLACKLIST("image2"), // Image demuxers ("_pipe" is detected explicitly) {"image2pipe", .image_format = true}, {0} }; struct nested_stream { AVIOContext *id; int64_t last_bytes; }; struct stream_info { struct sh_stream *sh; double last_key_pts; double highest_pts; double ts_offset; }; typedef struct lavf_priv { struct stream *stream; bool own_stream; char *filename; struct format_hack format_hack; AVInputFormat *avif; int avif_flags; AVFormatContext *avfc; AVIOContext *pb; struct stream_info **streams; // NULL for unknown streams int num_streams; char *mime_type; double seek_delay; struct demux_lavf_opts *opts; double mf_fps; bool pcm_seek_hack_disabled; AVStream *pcm_seek_hack; int pcm_seek_hack_packet_size; int linearize_ts; bool any_ts_fixed; // Proxying nested streams. struct nested_stream *nested; int num_nested; int (*default_io_open)(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **options); void (*default_io_close)(struct AVFormatContext *s, AVIOContext *pb); } lavf_priv_t; static void update_read_stats(struct demuxer *demuxer) { lavf_priv_t *priv = demuxer->priv; for (int n = 0; n < priv->num_nested; n++) { struct nested_stream *nest = &priv->nested[n]; #if !HAVE_FFMPEG_STRICT_ABI // Note: accessing the bytes_read field is not allowed by FFmpeg's API. // This is fully intentional - there is no other way to get this // information (not even by custom I/O, because the connection reuse // mechanism by the HLS demuxer would get disabled). int64_t cur = nest->id->bytes_read; int64_t new = cur - nest->last_bytes; nest->last_bytes = cur; demux_report_unbuffered_read_bytes(demuxer, new); #endif } } // At least mp4 has name="mov,mp4,m4a,3gp,3g2,mj2", so we split the name // on "," in general. static bool matches_avinputformat_name(struct lavf_priv *priv, const char *name) { const char *avifname = priv->avif->name; while (1) { const char *next = strchr(avifname, ','); if (!next) return !strcmp(avifname, name); int len = next - avifname; if (len == strlen(name) && !memcmp(avifname, name, len)) return true; avifname = next + 1; } } static int mp_read(void *opaque, uint8_t *buf, int size) { struct demuxer *demuxer = opaque; lavf_priv_t *priv = demuxer->priv; struct stream *stream = priv->stream; int ret = stream_read_partial(stream, buf, size); MP_TRACE(demuxer, "%d=mp_read(%p, %p, %d), pos: %"PRId64", eof:%d\n", ret, stream, buf, size, stream_tell(stream), stream->eof); return ret ? ret : AVERROR_EOF; } static int64_t mp_seek(void *opaque, int64_t pos, int whence) { struct demuxer *demuxer = opaque; lavf_priv_t *priv = demuxer->priv; struct stream *stream = priv->stream; MP_TRACE(demuxer, "mp_seek(%p, %"PRId64", %s)\n", stream, pos, whence == SEEK_END ? "end" : whence == SEEK_CUR ? "cur" : whence == SEEK_SET ? "set" : "size"); if (whence == SEEK_END || whence == AVSEEK_SIZE) { int64_t end = stream_get_size(stream); if (end < 0) return -1; if (whence == AVSEEK_SIZE) return end; pos += end; } else if (whence == SEEK_CUR) { pos += stream_tell(stream); } else if (whence != SEEK_SET) { return -1; } if (pos < 0) return -1; int64_t current_pos = stream_tell(stream); if (stream_seek(stream, pos) == 0) { stream_seek(stream, current_pos); return -1; } return pos; } static int64_t mp_read_seek(void *opaque, int stream_idx, int64_t ts, int flags) { struct demuxer *demuxer = opaque; lavf_priv_t *priv = demuxer->priv; struct stream *stream = priv->stream; struct stream_avseek cmd = { .stream_index = stream_idx, .timestamp = ts, .flags = flags, }; if (stream_control(stream, STREAM_CTRL_AVSEEK, &cmd) == STREAM_OK) { stream_drop_buffers(stream); return 0; } return AVERROR(ENOSYS); } static void list_formats(struct demuxer *demuxer) { MP_INFO(demuxer, "Available lavf input formats:\n"); const AVInputFormat *fmt; void *iter = NULL; while ((fmt = av_demuxer_iterate(&iter))) MP_INFO(demuxer, "%15s : %s\n", fmt->name, fmt->long_name); } static void convert_charset(struct demuxer *demuxer) { lavf_priv_t *priv = demuxer->priv; char *cp = priv->opts->sub_cp; if (!cp || mp_charset_is_utf8(cp)) return; bstr data = stream_read_complete(priv->stream, NULL, 128 * 1024 * 1024); if (!data.start) { MP_WARN(demuxer, "File too big (or error reading) - skip charset probing.\n"); return; } void *alloc = data.start; cp = (char *)mp_charset_guess(priv, demuxer->log, data, cp, 0); if (cp && !mp_charset_is_utf8(cp)) MP_INFO(demuxer, "Using subtitle charset: %s\n", cp); // libavformat transparently converts UTF-16 to UTF-8 if (!mp_charset_is_utf16(cp) && !mp_charset_is_utf8(cp)) { bstr conv = mp_iconv_to_utf8(demuxer->log, data, cp, MP_ICONV_VERBOSE); if (conv.start && conv.start != data.start) talloc_steal(alloc, conv.start); if (conv.start) data = conv; } if (data.start) { priv->stream = stream_memory_open(demuxer->global, data.start, data.len); priv->own_stream = true; } talloc_free(alloc); } static char *remove_prefix(char *s, const char *const *prefixes) { for (int n = 0; prefixes[n]; n++) { int len = strlen(prefixes[n]); if (strncmp(s, prefixes[n], len) == 0) return s + len; } return s; } static const char *const prefixes[] = {"ffmpeg://", "lavf://", "avdevice://", "av://", NULL}; static int lavf_check_file(demuxer_t *demuxer, enum demux_check check) { lavf_priv_t *priv = demuxer->priv; struct demux_lavf_opts *lavfdopts = priv->opts; struct stream *s = priv->stream; priv->filename = remove_prefix(s->url, prefixes); char *avdevice_format = NULL; if (s->info && strcmp(s->info->name, "avdevice") == 0) { // always require filename in the form "format:filename" char *sep = strchr(priv->filename, ':'); if (!sep) { MP_FATAL(demuxer, "Must specify filename in 'format:filename' form\n"); return -1; } avdevice_format = talloc_strndup(priv, priv->filename, sep - priv->filename); priv->filename = sep + 1; } char *mime_type = s->mime_type; if (!lavfdopts->allow_mimetype || !mime_type) mime_type = ""; AVInputFormat *forced_format = NULL; const char *format = lavfdopts->format; if (!format) format = s->lavf_type; if (!format) format = avdevice_format; if (format) { if (strcmp(format, "help") == 0) { list_formats(demuxer); return -1; } forced_format = av_find_input_format(format); if (!forced_format) { MP_FATAL(demuxer, "Unknown lavf format %s\n", format); return -1; } } AVProbeData avpd = { // Disable file-extension matching with normal checks .filename = priv->filename, .buf_size = 0, .buf = av_mallocz(PROBE_BUF_SIZE + AV_INPUT_BUFFER_PADDING_SIZE), }; if (!avpd.buf) return -1; bool final_probe = false; do { int score = 0; if (forced_format) { priv->avif = forced_format; score = AVPROBE_SCORE_MAX; } else { int nsize = av_clip(avpd.buf_size * 2, INITIAL_PROBE_SIZE, PROBE_BUF_SIZE); bstr buf = stream_peek(s, nsize); if (buf.len <= avpd.buf_size) final_probe = true; memcpy(avpd.buf, buf.start, buf.len); avpd.buf_size = buf.len; priv->avif = av_probe_input_format2(&avpd, avpd.buf_size > 0, &score); } if (priv->avif) { MP_VERBOSE(demuxer, "Found '%s' at score=%d size=%d%s.\n", priv->avif->name, score, avpd.buf_size, forced_format ? " (forced)" : ""); for (int n = 0; lavfdopts->hacks && format_hacks[n].ff_name; n++) { const struct format_hack *entry = &format_hacks[n]; if (!matches_avinputformat_name(priv, entry->ff_name)) continue; if (entry->mime_type && strcasecmp(entry->mime_type, mime_type) != 0) continue; priv->format_hack = *entry; break; } if (score >= lavfdopts->probescore) break; if (priv->format_hack.probescore && score >= priv->format_hack.probescore && (!priv->format_hack.max_probe || final_probe)) break; } priv->avif = NULL; priv->format_hack = (struct format_hack){0}; } while (!final_probe); av_free(avpd.buf); if (priv->avif && !forced_format && priv->format_hack.ignore) { MP_VERBOSE(demuxer, "Format blacklisted.\n"); priv->avif = NULL; } if (!priv->avif) { MP_VERBOSE(demuxer, "No format found, try lowering probescore or forcing the format.\n"); return -1; } if (bstr_endswith0(bstr0(priv->avif->name), "_pipe")) { MP_VERBOSE(demuxer, "Assuming this is an image format.\n"); priv->format_hack.image_format = true; } if (lavfdopts->hacks) priv->avif_flags = priv->avif->flags | priv->format_hack.if_flags; priv->linearize_ts = lavfdopts->linearize_ts; if (priv->linearize_ts < 0 && !priv->format_hack.linearize_audio_ts) priv->linearize_ts = 0; demuxer->filetype = priv->avif->name; if (priv->format_hack.detect_charset) convert_charset(demuxer); return 0; } static char *replace_idx_ext(void *ta_ctx, bstr f) { if (f.len < 4 || f.start[f.len - 4] != '.') return NULL; char *ext = bstr_endswith0(f, "IDX") ? "SUB" : "sub"; // match case return talloc_asprintf(ta_ctx, "%.*s.%s", BSTR_P(bstr_splice(f, 0, -4)), ext); } static void guess_and_set_vobsub_name(struct demuxer *demuxer, AVDictionary **d) { lavf_priv_t *priv = demuxer->priv; if (!matches_avinputformat_name(priv, "vobsub")) return; void *tmp = talloc_new(NULL); bstr bfilename = bstr0(priv->filename); char *subname = NULL; if (mp_is_url(bfilename)) { // It might be a http URL, which has additional parameters after the // end of the actual file path. bstr start, end; if (bstr_split_tok(bfilename, "?", &start, &end)) { subname = replace_idx_ext(tmp, start); if (subname) subname = talloc_asprintf(tmp, "%s?%.*s", subname, BSTR_P(end)); } } if (!subname) subname = replace_idx_ext(tmp, bfilename); if (!subname) subname = talloc_asprintf(tmp, "%.*s.sub", BSTR_P(bfilename)); MP_VERBOSE(demuxer, "Assuming associated .sub file: %s\n", subname); av_dict_set(d, "sub_name", subname, 0); talloc_free(tmp); } static void select_tracks(struct demuxer *demuxer, int start) { lavf_priv_t *priv = demuxer->priv; for (int n = start; n < priv->num_streams; n++) { struct sh_stream *stream = priv->streams[n]->sh; AVStream *st = priv->avfc->streams[n]; bool selected = stream && demux_stream_is_selected(stream) && !stream->attached_picture; st->discard = selected ? AVDISCARD_DEFAULT : AVDISCARD_ALL; } } static void export_replaygain(demuxer_t *demuxer, struct sh_stream *sh, AVStream *st) { for (int i = 0; i < st->nb_side_data; i++) { AVReplayGain *av_rgain; struct replaygain_data *rgain; AVPacketSideData *src_sd = &st->side_data[i]; if (src_sd->type != AV_PKT_DATA_REPLAYGAIN) continue; av_rgain = (AVReplayGain*)src_sd->data; rgain = talloc_ptrtype(demuxer, rgain); // Set values in *rgain, using track gain as a fallback for album gain // if the latter is not present. This behavior matches that in // demux/demux.c's decode_rgain; if you change this, please make // equivalent changes there too. if (av_rgain->track_gain != INT32_MIN && av_rgain->track_peak != 0.0) { // Track gain is defined. rgain->track_gain = av_rgain->track_gain / 100000.0f; rgain->track_peak = av_rgain->track_peak / 100000.0f; if (av_rgain->album_gain != INT32_MIN && av_rgain->album_peak != 0.0) { // Album gain is also defined. rgain->album_gain = av_rgain->album_gain / 100000.0f; rgain->album_peak = av_rgain->album_peak / 100000.0f; } else { // Album gain is undefined; fall back to track gain. rgain->album_gain = rgain->track_gain; rgain->album_peak = rgain->track_peak; } } // This must be run only before the stream was added, otherwise there // will be race conditions with accesses from the user thread. assert(!sh->ds); sh->codec->replaygain_data = rgain; } } // Return a dictionary entry as (decimal) integer. static int dict_get_decimal(AVDictionary *dict, const char *entry, int def) { AVDictionaryEntry *e = av_dict_get(dict, entry, NULL, 0); if (e && e->value) { char *end = NULL; long int r = strtol(e->value, &end, 10); if (end && !end[0] && r >= INT_MIN && r <= INT_MAX) return r; } return def; } static void handle_new_stream(demuxer_t *demuxer, int i) { lavf_priv_t *priv = demuxer->priv; AVFormatContext *avfc = priv->avfc; AVStream *st = avfc->streams[i]; struct sh_stream *sh = NULL; AVCodecParameters *codec = st->codecpar; int lavc_delay = codec->initial_padding; switch (codec->codec_type) { case AVMEDIA_TYPE_AUDIO: { sh = demux_alloc_sh_stream(STREAM_AUDIO); // probably unneeded mp_chmap_set_unknown(&sh->codec->channels, codec->channels); if (codec->channel_layout) mp_chmap_from_lavc(&sh->codec->channels, codec->channel_layout); sh->codec->samplerate = codec->sample_rate; sh->codec->bitrate = codec->bit_rate; double delay = 0; if (codec->sample_rate > 0) delay = lavc_delay / (double)codec->sample_rate; priv->seek_delay = MPMAX(priv->seek_delay, delay); export_replaygain(demuxer, sh, st); sh->seek_preroll = delay; break; } case AVMEDIA_TYPE_VIDEO: { sh = demux_alloc_sh_stream(STREAM_VIDEO); if ((st->disposition & AV_DISPOSITION_ATTACHED_PIC) && !(st->disposition & AV_DISPOSITION_TIMED_THUMBNAILS)) { sh->attached_picture = new_demux_packet_from_avpacket(&st->attached_pic); if (sh->attached_picture) { sh->attached_picture->pts = 0; talloc_steal(sh, sh->attached_picture); sh->attached_picture->keyframe = true; } } if (!sh->attached_picture) { // A real video stream probably means it's a packet based format. priv->pcm_seek_hack_disabled = true; priv->pcm_seek_hack = NULL; // Also, we don't want to do this shit for ogv videos. if (priv->linearize_ts < 0) priv->linearize_ts = 0; } sh->codec->disp_w = codec->width; sh->codec->disp_h = codec->height; if (st->avg_frame_rate.num) sh->codec->fps = av_q2d(st->avg_frame_rate); if (priv->format_hack.image_format) sh->codec->fps = priv->mf_fps; sh->codec->par_w = st->sample_aspect_ratio.num; sh->codec->par_h = st->sample_aspect_ratio.den; uint8_t *sd = av_stream_get_side_data(st, AV_PKT_DATA_DISPLAYMATRIX, NULL); if (sd) { double r = av_display_rotation_get((uint32_t *)sd); if (!isnan(r)) sh->codec->rotate = (((int)(-r) % 360) + 360) % 360; } // This also applies to vfw-muxed mkv, but we can't detect these easily. sh->codec->avi_dts = matches_avinputformat_name(priv, "avi"); break; } case AVMEDIA_TYPE_SUBTITLE: { sh = demux_alloc_sh_stream(STREAM_SUB); if (codec->extradata_size) { sh->codec->extradata = talloc_size(sh, codec->extradata_size); memcpy(sh->codec->extradata, codec->extradata, codec->extradata_size); sh->codec->extradata_size = codec->extradata_size; } if (matches_avinputformat_name(priv, "microdvd")) { AVRational r; if (av_opt_get_q(avfc, "subfps", AV_OPT_SEARCH_CHILDREN, &r) >= 0) { // File headers don't have a FPS set. if (r.num < 1 || r.den < 1) sh->codec->frame_based = 23.976; // default timebase } } break; } case AVMEDIA_TYPE_ATTACHMENT: { AVDictionaryEntry *ftag = av_dict_get(st->metadata, "filename", NULL, 0); char *filename = ftag ? ftag->value : NULL; AVDictionaryEntry *mt = av_dict_get(st->metadata, "mimetype", NULL, 0); char *mimetype = mt ? mt->value : NULL; if (mimetype) { demuxer_add_attachment(demuxer, filename, mimetype, codec->extradata, codec->extradata_size); } break; } default: ; } struct stream_info *info = talloc_zero(priv, struct stream_info); *info = (struct stream_info){ .sh = sh, .last_key_pts = MP_NOPTS_VALUE, .highest_pts = MP_NOPTS_VALUE, }; assert(priv->num_streams == i); // directly mapped MP_TARRAY_APPEND(priv, priv->streams, priv->num_streams, info); if (sh) { sh->ff_index = st->index; sh->codec->codec = mp_codec_from_av_codec_id(codec->codec_id); sh->codec->codec_tag = codec->codec_tag; sh->codec->lav_codecpar = avcodec_parameters_alloc(); if (sh->codec->lav_codecpar) avcodec_parameters_copy(sh->codec->lav_codecpar, codec); sh->codec->native_tb_num = st->time_base.num; sh->codec->native_tb_den = st->time_base.den; if (st->disposition & AV_DISPOSITION_DEFAULT) sh->default_track = true; if (st->disposition & AV_DISPOSITION_FORCED) sh->forced_track = true; if (st->disposition & AV_DISPOSITION_DEPENDENT) sh->dependent_track = true; if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED) sh->visual_impaired_track = true; if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED) sh->hearing_impaired_track = true; if (st->disposition & AV_DISPOSITION_STILL_IMAGE) sh->still_image = true; if (priv->format_hack.use_stream_ids) sh->demuxer_id = st->id; AVDictionaryEntry *title = av_dict_get(st->metadata, "title", NULL, 0); if (title && title->value) sh->title = talloc_strdup(sh, title->value); if (!sh->title && st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED) sh->title = talloc_asprintf(sh, "visual impaired"); if (!sh->title && st->disposition & AV_DISPOSITION_HEARING_IMPAIRED) sh->title = talloc_asprintf(sh, "hearing impaired"); AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0); if (lang && lang->value && strcmp(lang->value, "und") != 0) sh->lang = talloc_strdup(sh, lang->value); sh->hls_bitrate = dict_get_decimal(st->metadata, "variant_bitrate", 0); if (!sh->title && sh->hls_bitrate > 0) sh->title = talloc_asprintf(sh, "bitrate %d", sh->hls_bitrate); sh->missing_timestamps = !!(priv->avif_flags & AVFMT_NOTIMESTAMPS); mp_tags_copy_from_av_dictionary(sh->tags, st->metadata); demux_add_sh_stream(demuxer, sh); // Unfortunately, there is no better way to detect PCM codecs, other // than listing them all manually. (Or other "frameless" codecs. Or // rather, codecs with frames so small libavformat will put multiple of // them into a single packet, but not preserve these artificial packet // boundaries on seeking.) if (sh->codec->codec && strncmp(sh->codec->codec, "pcm_", 4) == 0 && codec->block_align && !priv->pcm_seek_hack_disabled && priv->opts->hacks && !priv->format_hack.no_pcm_seek && st->time_base.num == 1 && st->time_base.den == codec->sample_rate) { if (priv->pcm_seek_hack) { // More than 1 audio stream => usually doesn't apply. priv->pcm_seek_hack_disabled = true; priv->pcm_seek_hack = NULL; } else { priv->pcm_seek_hack = st; } } } select_tracks(demuxer, i); } // Add any new streams that might have been added static void add_new_streams(demuxer_t *demuxer) { lavf_priv_t *priv = demuxer->priv; while (priv->num_streams < priv->avfc->nb_streams) handle_new_stream(demuxer, priv->num_streams); } static void update_metadata(demuxer_t *demuxer) { lavf_priv_t *priv = demuxer->priv; if (priv->avfc->event_flags & AVFMT_EVENT_FLAG_METADATA_UPDATED) { mp_tags_copy_from_av_dictionary(demuxer->metadata, priv->avfc->metadata); priv->avfc->event_flags = 0; demux_metadata_changed(demuxer); } } static int interrupt_cb(void *ctx) { struct demuxer *demuxer = ctx; return mp_cancel_test(demuxer->cancel); } static int block_io_open(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **options) { struct demuxer *demuxer = s->opaque; MP_ERR(demuxer, "Not opening '%s' due to --access-references=no.\n", url); return AVERROR(EACCES); } static int nested_io_open(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **options) { struct demuxer *demuxer = s->opaque; lavf_priv_t *priv = demuxer->priv; int r = priv->default_io_open(s, pb, url, flags, options); if (r >= 0) { struct nested_stream nest = { .id = *pb, }; MP_TARRAY_APPEND(priv, priv->nested, priv->num_nested, nest); } return r; } static void nested_io_close(struct AVFormatContext *s, AVIOContext *pb) { struct demuxer *demuxer = s->opaque; lavf_priv_t *priv = demuxer->priv; for (int n = 0; n < priv->num_nested; n++) { if (priv->nested[n].id == pb) { MP_TARRAY_REMOVE_AT(priv->nested, priv->num_nested, n); break; } } priv->default_io_close(s, pb); } static int demux_open_lavf(demuxer_t *demuxer, enum demux_check check) { AVFormatContext *avfc; AVDictionaryEntry *t = NULL; float analyze_duration = 0; lavf_priv_t *priv = talloc_zero(NULL, lavf_priv_t); demuxer->priv = priv; priv->stream = demuxer->stream; priv->opts = mp_get_config_group(priv, demuxer->global, &demux_lavf_conf); struct demux_lavf_opts *lavfdopts = priv->opts; int index_mode; mp_read_option_raw(demuxer->global, "index", &m_option_type_choice, &index_mode); mp_read_option_raw(demuxer->global, "mf-fps", &m_option_type_double, &priv->mf_fps); if (lavf_check_file(demuxer, check) < 0) return -1; avfc = avformat_alloc_context(); if (!avfc) return -1; if (index_mode != 1) avfc->flags |= AVFMT_FLAG_IGNIDX; if (lavfdopts->probesize) { if (av_opt_set_int(avfc, "probesize", lavfdopts->probesize, 0) < 0) MP_ERR(demuxer, "couldn't set option probesize to %u\n", lavfdopts->probesize); } if (priv->format_hack.analyzeduration) analyze_duration = priv->format_hack.analyzeduration; if (lavfdopts->analyzeduration) analyze_duration = lavfdopts->analyzeduration; if (analyze_duration > 0) { if (av_opt_set_int(avfc, "analyzeduration", analyze_duration * AV_TIME_BASE, 0) < 0) MP_ERR(demuxer, "demux_lavf, couldn't set option " "analyzeduration to %f\n", analyze_duration); } AVDictionary *dopts = NULL; if ((priv->avif_flags & AVFMT_NOFILE) || priv->format_hack.no_stream) { mp_setup_av_network_options(&dopts, demuxer->global, demuxer->log); // This might be incorrect. demuxer->seekable = true; } else { void *buffer = av_malloc(lavfdopts->buffersize); if (!buffer) return -1; priv->pb = avio_alloc_context(buffer, lavfdopts->buffersize, 0, demuxer, mp_read, NULL, mp_seek); if (!priv->pb) { av_free(buffer); return -1; } priv->pb->read_seek = mp_read_seek; priv->pb->seekable = demuxer->seekable ? AVIO_SEEKABLE_NORMAL : 0; avfc->pb = priv->pb; if (stream_control(priv->stream, STREAM_CTRL_HAS_AVSEEK, NULL) > 0) demuxer->seekable = true; demuxer->seekable |= priv->format_hack.fully_read; } if (matches_avinputformat_name(priv, "rtsp")) { const char *transport = NULL; switch (lavfdopts->rtsp_transport) { case 1: transport = "udp"; break; case 2: transport = "tcp"; break; case 3: transport = "http"; break; } if (transport) av_dict_set(&dopts, "rtsp_transport", transport, 0); } guess_and_set_vobsub_name(demuxer, &dopts); if (priv->format_hack.fix_editlists) av_dict_set(&dopts, "advanced_editlist", "0", 0); avfc->interrupt_callback = (AVIOInterruptCB){ .callback = interrupt_cb, .opaque = demuxer, }; avfc->opaque = demuxer; if (demuxer->access_references) { priv->default_io_open = avfc->io_open; priv->default_io_close = avfc->io_close; #if !HAVE_FFMPEG_STRICT_ABI avfc->io_open = nested_io_open; avfc->io_close = nested_io_close; #endif } else { avfc->io_open = block_io_open; } mp_set_avdict(&dopts, lavfdopts->avopts); if (avformat_open_input(&avfc, priv->filename, priv->avif, &dopts) < 0) { MP_ERR(demuxer, "avformat_open_input() failed\n"); av_dict_free(&dopts); return -1; } mp_avdict_print_unset(demuxer->log, MSGL_V, dopts); av_dict_free(&dopts); priv->avfc = avfc; bool probeinfo = lavfdopts->probeinfo != 0; switch (lavfdopts->probeinfo) { case -2: probeinfo = priv->avfc->nb_streams == 0; break; case -1: probeinfo = !priv->format_hack.skipinfo; break; } if (demuxer->params && demuxer->params->skip_lavf_probing) probeinfo = false; if (probeinfo) { if (avformat_find_stream_info(avfc, NULL) < 0) { MP_ERR(demuxer, "av_find_stream_info() failed\n"); return -1; } MP_VERBOSE(demuxer, "avformat_find_stream_info() finished after %"PRId64 " bytes.\n", stream_tell(priv->stream)); } for (int i = 0; i < avfc->nb_chapters; i++) { AVChapter *c = avfc->chapters[i]; t = av_dict_get(c->metadata, "title", NULL, 0); int index = demuxer_add_chapter(demuxer, t ? t->value : "", c->start * av_q2d(c->time_base), i); mp_tags_copy_from_av_dictionary(demuxer->chapters[index].metadata, c->metadata); } add_new_streams(demuxer); mp_tags_copy_from_av_dictionary(demuxer->metadata, avfc->metadata); demuxer->ts_resets_possible = priv->avif_flags & (AVFMT_TS_DISCONT | AVFMT_NOTIMESTAMPS); if (avfc->start_time != AV_NOPTS_VALUE) demuxer->start_time = avfc->start_time / (double)AV_TIME_BASE; demuxer->fully_read = priv->format_hack.fully_read; #ifdef AVFMTCTX_UNSEEKABLE if (avfc->ctx_flags & AVFMTCTX_UNSEEKABLE) demuxer->seekable = false; #endif demuxer->is_network |= priv->format_hack.is_network; demuxer->seekable &= !priv->format_hack.no_seek; if (priv->avfc->duration > 0) { demuxer->duration = (double)priv->avfc->duration / AV_TIME_BASE; } else { double total_duration = 0; double av_duration = 0; for (int n = 0; n < priv->avfc->nb_streams; n++) { AVStream *st = priv->avfc->streams[n]; if (st->duration <= 0) continue; double f_duration = st->duration * av_q2d(st->time_base); total_duration = MPMAX(total_duration, f_duration); if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO || st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) av_duration = MPMAX(av_duration, f_duration); } double duration = av_duration > 0 ? av_duration : total_duration; if (duration > 0) demuxer->duration = duration; } // In some cases, libavformat will export bogus bullshit timestamps anyway, // such as with mjpeg. if (priv->avif_flags & AVFMT_NOTIMESTAMPS) { MP_WARN(demuxer, "This format is marked by FFmpeg as having no timestamps!\n" "FFmpeg will likely make up its own broken timestamps. For\n" "video streams you can correct this with:\n" " --no-correct-pts --fps=VALUE\n" "with VALUE being the real framerate of the stream. You can\n" "expect seeking and buffering estimation to be generally\n" "broken as well.\n"); } if (demuxer->fully_read) { demux_close_stream(demuxer); if (priv->own_stream) free_stream(priv->stream); priv->own_stream = false; priv->stream = demuxer->stream; } return 0; } static bool demux_lavf_read_packet(struct demuxer *demux, struct demux_packet **mp_pkt) { lavf_priv_t *priv = demux->priv; AVPacket *pkt = &(AVPacket){0}; int r = av_read_frame(priv->avfc, pkt); update_read_stats(demux); if (r < 0) { av_packet_unref(pkt); if (r == AVERROR(EAGAIN)) return true; if (r == AVERROR_EOF) return false; MP_WARN(demux, "error reading packet.\n"); return false; } add_new_streams(demux); update_metadata(demux); assert(pkt->stream_index >= 0 && pkt->stream_index < priv->num_streams); struct stream_info *info = priv->streams[pkt->stream_index]; struct sh_stream *stream = info->sh; AVStream *st = priv->avfc->streams[pkt->stream_index]; if (!demux_stream_is_selected(stream)) { av_packet_unref(pkt); return true; // don't signal EOF if skipping a packet } struct demux_packet *dp = new_demux_packet_from_avpacket(pkt); if (!dp) { av_packet_unref(pkt); return true; } if (priv->pcm_seek_hack == st && !priv->pcm_seek_hack_packet_size) priv->pcm_seek_hack_packet_size = pkt->size; dp->pts = mp_pts_from_av(pkt->pts, &st->time_base); dp->dts = mp_pts_from_av(pkt->dts, &st->time_base); dp->duration = pkt->duration * av_q2d(st->time_base); dp->pos = pkt->pos; dp->keyframe = pkt->flags & AV_PKT_FLAG_KEY; #if LIBAVFORMAT_VERSION_MICRO >= 100 if (pkt->flags & AV_PKT_FLAG_DISCARD) MP_ERR(demux, "Edit lists are not correctly supported (FFmpeg issue).\n"); #endif av_packet_unref(pkt); if (priv->format_hack.clear_filepos) dp->pos = -1; dp->stream = stream->index; if (priv->linearize_ts) { dp->pts = MP_ADD_PTS(dp->pts, info->ts_offset); dp->dts = MP_ADD_PTS(dp->dts, info->ts_offset); double pts = MP_PTS_OR_DEF(dp->pts, dp->dts); if (pts != MP_NOPTS_VALUE) { if (dp->keyframe) { if (pts < info->highest_pts) { MP_WARN(demux, "Linearizing discontinuity: %f -> %f\n", pts, info->highest_pts); // Note: introduces a small discontinuity by a frame size. double diff = info->highest_pts - pts; dp->pts = MP_ADD_PTS(dp->pts, diff); dp->dts = MP_ADD_PTS(dp->dts, diff); pts += diff; info->ts_offset += diff; priv->any_ts_fixed = true; } info->last_key_pts = pts; } info->highest_pts = MP_PTS_MAX(info->highest_pts, pts); } } if (st->event_flags & AVSTREAM_EVENT_FLAG_METADATA_UPDATED) { st->event_flags = 0; struct mp_tags *tags = talloc_zero(NULL, struct mp_tags); mp_tags_copy_from_av_dictionary(tags, st->metadata); double pts = MP_PTS_OR_DEF(dp->pts, dp->dts); demux_stream_tags_changed(demux, stream, tags, pts); } *mp_pkt = dp; return true; } static void demux_seek_lavf(demuxer_t *demuxer, double seek_pts, int flags) { lavf_priv_t *priv = demuxer->priv; int avsflags = 0; int64_t seek_pts_av = 0; int seek_stream = -1; if (priv->any_ts_fixed) { // helpful message to piss of users MP_WARN(demuxer, "Some timestamps returned by the demuxer were linearized. " "A low level seek was requested; this won't work due to " "restrictions in libavformat's API. You may have more " "luck by enabling or enlarging the mpv cache.\n"); } if (priv->linearize_ts < 0) priv->linearize_ts = 0; if (!(flags & SEEK_FORWARD)) avsflags = AVSEEK_FLAG_BACKWARD; if (flags & SEEK_FACTOR) { struct stream *s = priv->stream; int64_t end = stream_get_size(s); if (end > 0 && demuxer->ts_resets_possible && !(priv->avif_flags & AVFMT_NO_BYTE_SEEK)) { avsflags |= AVSEEK_FLAG_BYTE; seek_pts_av = end * seek_pts; } else if (priv->avfc->duration != 0 && priv->avfc->duration != AV_NOPTS_VALUE) { seek_pts_av = seek_pts * priv->avfc->duration; } } else { if (!(flags & SEEK_FORWARD)) seek_pts -= priv->seek_delay; seek_pts_av = seek_pts * AV_TIME_BASE; } // Hack to make wav seeking "deterministic". Without this, features like // backward playback won't work. if (priv->pcm_seek_hack && !priv->pcm_seek_hack_packet_size) { // This might for example be the initial seek. Fuck it up like the // bullshit it is. AVPacket pkt = {0}; if (av_read_frame(priv->avfc, &pkt) >= 0) priv->pcm_seek_hack_packet_size = pkt.size; av_packet_unref(&pkt); add_new_streams(demuxer); } if (priv->pcm_seek_hack && priv->pcm_seek_hack_packet_size && !(avsflags & AVSEEK_FLAG_BYTE)) { int samples = priv->pcm_seek_hack_packet_size / priv->pcm_seek_hack->codecpar->block_align; if (samples > 0) { MP_VERBOSE(demuxer, "using bullshit libavformat PCM seek hack\n"); double pts = seek_pts_av / (double)AV_TIME_BASE; seek_pts_av = pts / av_q2d(priv->pcm_seek_hack->time_base); int64_t align = seek_pts_av % samples; seek_pts_av -= align; seek_stream = priv->pcm_seek_hack->index; } } int r = av_seek_frame(priv->avfc, seek_stream, seek_pts_av, avsflags); if (r < 0 && (avsflags & AVSEEK_FLAG_BACKWARD)) { // When seeking before the beginning of the file, and seeking fails, // try again without the backwards flag to make it seek to the // beginning. avsflags &= ~AVSEEK_FLAG_BACKWARD; r = av_seek_frame(priv->avfc, seek_stream, seek_pts_av, avsflags); } if (r < 0) { char buf[180]; av_strerror(r, buf, sizeof(buf)); MP_VERBOSE(demuxer, "Seek failed (%s)\n", buf); } update_read_stats(demuxer); } static void demux_lavf_switched_tracks(struct demuxer *demuxer) { select_tracks(demuxer, 0); } static void demux_close_lavf(demuxer_t *demuxer) { lavf_priv_t *priv = demuxer->priv; if (priv) { // This will be a dangling pointer; but see below. AVIOContext *leaking = priv->avfc ? priv->avfc->pb : NULL; avformat_close_input(&priv->avfc); // The ffmpeg garbage breaks its own API yet again: hls.c will call // io_open on the main playlist, but never calls io_close. This happens // to work out for us (since we don't really use custom I/O), but it's // still weird. Compensate. if (priv->num_nested == 1 && priv->nested[0].id == leaking) priv->num_nested = 0; if (priv->num_nested) { MP_WARN(demuxer, "Leaking %d nested connections (FFmpeg bug).\n", priv->num_nested); } if (priv->pb) av_freep(&priv->pb->buffer); av_freep(&priv->pb); for (int n = 0; n < priv->num_streams; n++) { struct stream_info *info = priv->streams[n]; if (info->sh) avcodec_parameters_free(&info->sh->codec->lav_codecpar); } if (priv->own_stream) free_stream(priv->stream); talloc_free(priv); demuxer->priv = NULL; } } const demuxer_desc_t demuxer_desc_lavf = { .name = "lavf", .desc = "libavformat", .read_packet = demux_lavf_read_packet, .open = demux_open_lavf, .close = demux_close_lavf, .seek = demux_seek_lavf, .switched_tracks = demux_lavf_switched_tracks, };