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https://github.com/mpv-player/mpv
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demux_lavf: reorganize hacks
An attempt to make format-specifics more declarative. (In my opinion, all of this should be either provided by libavformat, or should not be needed.) I'm still leaving many checks with matches_avinputformat_name(), because they're so specific. Also useful for the following commit.
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wm4
parent
c7f450723f
commit
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@ -94,9 +94,49 @@ const struct m_sub_options demux_lavf_conf = {
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},
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};
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struct format_hack {
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const char *ff_name;
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const char *mime_type;
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int probescore;
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float analyzeduration;
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bool max_probe : 1; // use probescore only if max. probe size reached
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bool ignore : 1; // blacklisted
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bool no_stream : 1; // do not wrap struct stream as AVIOContext
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bool use_stream_ids : 1; // export the native stream IDs
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// Do not confuse player's position estimation (position is into external
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// segment, with e.g. HLS, player knows about the playlist main file only).
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bool clear_filepos : 1;
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};
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#define BLACKLIST(fmt) {fmt, .ignore = true}
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static const struct format_hack format_hacks[] = {
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// for webradios
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{"aac", "audio/aacp", 25, 0.5},
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{"aac", "audio/aac", 25, 0.5},
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// some mp3 files don't detect correctly (usually id3v2 too large)
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{"mp3", "audio/mpeg", 24, 0.5},
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{"mp3", NULL, 24, .max_probe = true},
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{"hls", .no_stream = true, .clear_filepos = true},
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{"mpeg", .use_stream_ids = true},
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{"mpegts", .use_stream_ids = true},
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// Useless non-sense, sometimes breaks MLP2 subreader.c fallback
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BLACKLIST("tty"),
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// Image demuxers, disabled in favor of demux_mf (for now):
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BLACKLIST("image"),
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BLACKLIST("image2pipe"),
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BLACKLIST("bmp_pipe"), BLACKLIST("dpx_pipe"), BLACKLIST("exr_pipe"),
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BLACKLIST("j2k_pipe"), BLACKLIST("png_pipe"), BLACKLIST("tiff_pipe"),
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BLACKLIST("jpeg_pipe"),
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{0}
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};
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typedef struct lavf_priv {
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char *filename;
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const struct format_hack *format_hack;
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struct format_hack format_hack;
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AVInputFormat *avif;
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AVFormatContext *avfc;
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AVIOContext *pb;
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@ -109,32 +149,22 @@ typedef struct lavf_priv {
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bool merge_track_metadata;
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} lavf_priv_t;
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struct format_hack {
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const char *ff_name;
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const char *mime_type;
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int probescore;
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float analyzeduration;
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bool max_probe; // use probescore only if max. probe size reached
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};
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static const struct format_hack format_hacks[] = {
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// for webradios
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{"aac", "audio/aacp", 25, 0.5},
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{"aac", "audio/aac", 25, 0.5},
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// some mp3 files don't detect correctly
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{"mp3", "audio/mpeg", 24, 0.5},
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{"mp3", NULL, 24, .max_probe = true},
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{0}
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};
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static const char *const format_blacklist[] = {
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"tty", // Useless non-sense, sometimes breaks MLP2 subreader.c fallback
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// Image demuxers, disabled in favor of demux_mf:
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"image2", "image2pipe",
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"bmp_pipe", "dpx_pipe", "exr_pipe", "j2k_pipe", "png_pipe", "tiff_pipe",
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"jpeg_pipe",
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0
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};
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// At least mp4 has name="mov,mp4,m4a,3gp,3g2,mj2", so we split the name
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// on "," in general.
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static bool matches_avinputformat_name(struct lavf_priv *priv,
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const char *name)
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{
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const char *avifname = priv->avif->name;
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while (1) {
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const char *next = strchr(avifname, ',');
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if (!next)
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return !strcmp(avifname, name);
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int len = next - avifname;
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if (len == strlen(name) && !memcmp(avifname, name, len))
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return true;
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avifname = next + 1;
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}
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}
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static int mp_read(void *opaque, uint8_t *buf, int size)
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{
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@ -306,41 +336,34 @@ static int lavf_check_file(demuxer_t *demuxer, enum demux_check check)
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MP_VERBOSE(demuxer, "Found '%s' at score=%d size=%d.\n",
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priv->avif->name, score, avpd.buf_size);
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priv->format_hack = NULL;
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for (int n = 0; format_hacks[n].ff_name; n++) {
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const struct format_hack *entry = &format_hacks[n];
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if (strcmp(entry->ff_name, priv->avif->name) != 0)
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if (!matches_avinputformat_name(priv, entry->ff_name))
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continue;
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if (entry->mime_type && strcasecmp(entry->mime_type, mime_type) != 0)
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continue;
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priv->format_hack = entry;
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priv->format_hack = *entry;
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break;
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}
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if (score >= min_probe)
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break;
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if (priv->format_hack) {
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if (score >= priv->format_hack->probescore &&
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(!priv->format_hack->max_probe || final_probe))
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break;
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}
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if (priv->format_hack.probescore &&
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score >= priv->format_hack.probescore &&
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(!priv->format_hack.max_probe || final_probe))
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break;
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}
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priv->avif = NULL;
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priv->format_hack = NULL;
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priv->format_hack = (struct format_hack){0};
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} while (!final_probe);
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av_free(avpd.buf);
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if (priv->avif && !format) {
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for (int n = 0; format_blacklist[n]; n++) {
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if (strcmp(format_blacklist[n], priv->avif->name) == 0) {
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MP_VERBOSE(demuxer, "Format blacklisted.\n");
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priv->avif = NULL;
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break;
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}
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}
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if (priv->avif && !format && priv->format_hack.ignore) {
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MP_VERBOSE(demuxer, "Format blacklisted.\n");
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priv->avif = NULL;
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}
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if (!priv->avif) {
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@ -355,23 +378,6 @@ success:
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return 0;
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}
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static bool matches_avinputformat_name(struct lavf_priv *priv,
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const char *name)
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{
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// At least mp4 has name="mov,mp4,m4a,3gp,3g2,mj2", so we split the name
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// on "," in general.
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const char *avifname = priv->avif->name;
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while (1) {
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const char *next = strchr(avifname, ',');
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if (!next)
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return !strcmp(avifname, name);
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int len = next - avifname;
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if (len == strlen(name) && !memcmp(avifname, name, len))
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return true;
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avifname = next + 1;
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}
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}
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static uint8_t char2int(char c)
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{
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if (c >= '0' && c <= '9') return c - '0';
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@ -597,8 +603,7 @@ static void handle_stream(demuxer_t *demuxer, int i)
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if (st->disposition & AV_DISPOSITION_DEFAULT)
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sh->default_track = 1;
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if (matches_avinputformat_name(priv, "mpeg") ||
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matches_avinputformat_name(priv, "mpegts"))
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if (priv->format_hack.use_stream_ids)
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sh->demuxer_id = st->id;
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AVDictionaryEntry *title = av_dict_get(st->metadata, "title", NULL, 0);
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if (title && title->value)
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@ -708,8 +713,8 @@ static int demux_open_lavf(demuxer_t *demuxer, enum demux_check check)
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lavfdopts->probesize);
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}
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if (priv->format_hack && priv->format_hack->analyzeduration)
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analyze_duration = priv->format_hack->analyzeduration;
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if (priv->format_hack.analyzeduration)
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analyze_duration = priv->format_hack.analyzeduration;
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if (lavfdopts->analyzeduration)
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analyze_duration = lavfdopts->analyzeduration;
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if (analyze_duration > 0) {
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@ -723,7 +728,7 @@ static int demux_open_lavf(demuxer_t *demuxer, enum demux_check check)
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if ((priv->avif->flags & AVFMT_NOFILE) ||
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demuxer->stream->type == STREAMTYPE_AVDEVICE ||
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matches_avinputformat_name(priv, "hls"))
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priv->format_hack.no_stream)
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{
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mp_setup_av_network_options(&dopts, demuxer->global, demuxer->log, opts);
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// This might be incorrect.
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@ -870,9 +875,7 @@ static int demux_lavf_fill_buffer(demuxer_t *demux)
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}
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av_free_packet(pkt);
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// Do not confuse player's position estimation (position is into segment,
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// player knows about the playlist main file only).
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if (matches_avinputformat_name(priv, "hls"))
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if (priv->format_hack.clear_filepos)
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dp->pos = -1;
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demux_add_packet(stream, dp);
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