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[79.124.17.100]) by mx.google.com with ESMTP id b65si5298101wmi.205.2017.08.10.13.08.56; Thu, 10 Aug 2017 13:08:56 -0700 (PDT) Received-SPF: pass (google.com: domain of ffmpeg-devel-bounces@ffmpeg.org designates 79.124.17.100 as permitted sender) client-ip=79.124.17.100; Authentication-Results: mx.google.com; dkim=neutral (body hash did not verify) header.i=@google.com header.s=20161025 header.b=r7piSe1Z; dkim=neutral (body hash did not verify) header.i=@chromium.org header.s=google header.b=Z9fYDvUO; spf=pass (google.com: domain of ffmpeg-devel-bounces@ffmpeg.org designates 79.124.17.100 as permitted sender) smtp.mailfrom=ffmpeg-devel-bounces@ffmpeg.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=chromium.org Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 91ED5689C09; Thu, 10 Aug 2017 23:08:50 +0300 (EEST) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from mail-wr0-f174.google.com (mail-wr0-f174.google.com [209.85.128.174]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id C48F5689B88 for ; Thu, 10 Aug 2017 23:08:43 +0300 (EEST) Received: by mail-wr0-f174.google.com with SMTP id c24so6827300wra.1 for ; Thu, 10 Aug 2017 13:08:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to; bh=PwCFvt8bvXrz1B9htEj0QfrzeM188Aqf0bWWdXCp+fI=; b=r7piSe1ZOEqlxHPrPFeDCVobFo52wtDYI5V3SnV9Q8iNKZ6kekvyOZ7bSPVOIJHNuN WN171q2+/Ui5JEBBBMFLWaAy0tsDg8+732HrZgYjXBD81GJMVeFkJnxC+q311LDp7J8S KHzy9he+e2GdJFM97WWVQ79m1+WIc8kGcuNRUtTqixkhyVFEY1lxfJg8FyewR/+dICQK 0+eB2g1RRL0UfYRYPo0hm5na6P4U4Sw4HWJqbFyRLaVI8ptxPsTCtJpXSv//Vwt7mKxK NGkt8scVWBOd10cYzRVBp1Mxw0XKjqBxpsQzzt3Xbf1lOa8Qlms/LjYjJuUBE+esi0bC wh4Q== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to; bh=PwCFvt8bvXrz1B9htEj0QfrzeM188Aqf0bWWdXCp+fI=; b=Z9fYDvUORq5mIyjtEWqs8IXvS6by9xA7GR9d+rbrIwQtRqeQzWLRu2l/9o8Dt7Pdcr YJGHtHDpbTdAxnxZk0tyz6BaPb/KWE/zbsAw3O5Pw7LNHwgmVWtC3PSiZKDD1gFHx4OU YIusbW50UBo1qRuyTL9BnteP1aiVWW4C/QsrE= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:sender:in-reply-to:references:from :date:message-id:subject:to; bh=PwCFvt8bvXrz1B9htEj0QfrzeM188Aqf0bWWdXCp+fI=; b=ffvDy+cUQTvAa+4w9ux4A1CpUjQCubeVdAcg4YXEZ70B65ce5gO3OAj+6g80R89fGy NFjEaqySorR1SfoCD1ybiHNFk+J8Qh0Gh7op8V5LTbfg/3PvuPHgjpwEqcPropHencKQ Gjw+6wLzbn5Tb9HN8kJwm3K9aBmLL/vGCxGOLKA2Cr2HgBNXK8M+gbzAJJW7hpaqZ7q1 +I0ty3Jfs7x/Af6rZE8jM4/qnj8DWars3BdzHj8l7jPGBk6z7LlbeB0ej1VjiNrT4jQ8 q11WmJQdlIPi1m8TKGJArhfEYcwzY2xsgr5ActEon0N3NB14zADPbenhXsIVl+zBHorE 1uOw== X-Gm-Message-State: AHYfb5ja+ARFpShpz5wQmAvQxor3oJ1yMX/Cah+FI7J/j6pJ+9IL26mZ c9cyKWfArJEg+Gi2rq+cQUv5BbfBtAvPJTAlxg== X-Received: by 10.223.150.108 with SMTP id c41mr9096193wra.115.1502395371707; Thu, 10 Aug 2017 13:02:51 -0700 (PDT) MIME-Version: 1.0 Received: by 10.28.11.131 with HTTP; Thu, 10 Aug 2017 13:02:29 -0700 (PDT) In-Reply-To: <20170809014805.GL29506@nb4> References: <20170719222837.GE3740@nb4> <20170720120059.GF3740@nb4> <20170725200319.GL3740@nb4> <913B51B0-3E87-4A4D-A87C-B5CE223D3819@gmail.com> <20170809014805.GL29506@nb4> From: Dale Curtis Date: Thu, 10 Aug 2017 13:02:29 -0700 X-Google-Sender-Auth: OgE6VWrWwsnXNFZA3UjQ2fN7QgY Message-ID: To: FFmpeg development discussions and patches X-Content-Filtered-By: Mailman/MimeDel 2.1.20 Subject: Re: [FFmpeg-devel] [mov] Fix trampling of ctts during seeks when sidx support is enabled. X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: FFmpeg development discussions and patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: FFmpeg development discussions and patches Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" On Tue, Aug 8, 2017 at 6:48 PM, Michael Niedermayer wrote: > > the fate test seems to fail: > > did i do something silly ? > Ah no, I did when I remuxed the test file. Updated expectations and test clip at http://storage.googleapis.com/dalecurtis/buck480p30_na.mp4 - dale From 6e77ff3deaa6e0ac04fb4e51dba1d4a0e69e9d5d Mon Sep 17 00:00:00 2001 From: Dale Curtis Date: Mon, 17 Jul 2017 17:38:09 -0700 Subject: [PATCH] Fix trampling of ctts during seeks when sidx support is enabled. When sidx box support is enabled, the code will skip reading all trun boxes (each containing ctts entries for samples inthat box). If seeks are attempted before all ctts values are known, the old code would dump ctts entries into the wrong location. These are then used to compute pts values which leads to out of order and incorrectly timestamped packets. This patch fixes ctts processing by always using the index returned by av_add_index_entry() as the ctts_data index. When the index gains new entries old values are reshuffled as appropriate. This approach makes sense since the mov demuxer is already relying on the mapping of AVIndex entries to samples for correct demuxing. As a result of this all ctts entries are now 1-count. A followup change will be submitted to remove support for > 1 count entries which will simplify seeking. Notes for future improvement: Probably there are other boxes (stts, stsc, etc) that are impacted by this issue... this patch only attempts to fix ctts since it completely breaks packet timestamping. This patch continues using an array for the ctts data, which is not the most ideal given the rearrangement that needs to happen (via memmove as new entries are read in). Ideally AVIndex and the ctts data would be set-type structures so addition is always worst case O(lg(n)) instead of the O(n^2) that exists now; this slowdown is noticeable during seeks. Signed-off-by: Dale Curtis --- libavformat/isom.h | 1 + libavformat/mov.c | 79 ++++++++++++++++++---------- tests/fate/seek.mak | 3 ++ tests/ref/seek/extra-mp4 | 134 +++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 189 insertions(+), 28 deletions(-) create mode 100644 tests/ref/seek/extra-mp4 diff --git a/libavformat/isom.h b/libavformat/isom.h index ff009b0896..fdd98c28f5 100644 --- a/libavformat/isom.h +++ b/libavformat/isom.h @@ -137,6 +137,7 @@ typedef struct MOVStreamContext { unsigned int stts_count; MOVStts *stts_data; unsigned int ctts_count; + unsigned int ctts_allocated_size; MOVStts *ctts_data; unsigned int stsc_count; MOVStsc *stsc_data; diff --git a/libavformat/mov.c b/libavformat/mov.c index 63f84be782..85377f39a9 100644 --- a/libavformat/mov.c +++ b/libavformat/mov.c @@ -74,6 +74,8 @@ typedef struct MOVParseTableEntry { static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom); static int mov_read_mfra(MOVContext *c, AVIOContext *f); +static int64_t add_ctts_entry(MOVStts** ctts_data, unsigned int* ctts_count, unsigned int* allocated_size, + int count, int duration); static int mov_metadata_track_or_disc_number(MOVContext *c, AVIOContext *pb, unsigned len, const char *key) @@ -2708,7 +2710,7 @@ static int mov_read_ctts(MOVContext *c, AVIOContext *pb, MOVAtom atom) { AVStream *st; MOVStreamContext *sc; - unsigned int i, entries, ctts_count = 0; + unsigned int i, j, entries, ctts_count = 0; if (c->fc->nb_streams < 1) return 0; @@ -2726,7 +2728,7 @@ static int mov_read_ctts(MOVContext *c, AVIOContext *pb, MOVAtom atom) if (entries >= UINT_MAX / sizeof(*sc->ctts_data)) return AVERROR_INVALIDDATA; av_freep(&sc->ctts_data); - sc->ctts_data = av_realloc(NULL, entries * sizeof(*sc->ctts_data)); + sc->ctts_data = av_fast_realloc(NULL, &sc->ctts_allocated_size, entries * sizeof(*sc->ctts_data)); if (!sc->ctts_data) return AVERROR(ENOMEM); @@ -2741,9 +2743,9 @@ static int mov_read_ctts(MOVContext *c, AVIOContext *pb, MOVAtom atom) continue; } - sc->ctts_data[ctts_count].count = count; - sc->ctts_data[ctts_count].duration = duration; - ctts_count++; + /* Expand entries such that we have a 1-1 mapping with samples. */ + for (j = 0; j < count; j++) + add_ctts_entry(&sc->ctts_data, &ctts_count, &sc->ctts_allocated_size, 1, duration); av_log(c->fc, AV_LOG_TRACE, "count=%d, duration=%d\n", count, duration); @@ -3046,7 +3048,6 @@ static void mov_fix_index(MOVContext *mov, AVStream *st) int64_t index; int64_t index_ctts_count; int flags; - unsigned int ctts_allocated_size = 0; int64_t start_dts = 0; int64_t edit_list_media_time_dts = 0; int64_t edit_list_start_encountered = 0; @@ -3081,6 +3082,7 @@ static void mov_fix_index(MOVContext *mov, AVStream *st) msc->ctts_count = 0; msc->ctts_index = 0; msc->ctts_sample = 0; + msc->ctts_allocated_size = 0; // If the dts_shift is positive (in case of negative ctts values in mov), // then negate the DTS by dts_shift @@ -3190,7 +3192,7 @@ static void mov_fix_index(MOVContext *mov, AVStream *st) ctts_sample_old++; if (ctts_sample_old == ctts_data_old[ctts_index_old].count) { if (add_ctts_entry(&msc->ctts_data, &msc->ctts_count, - &ctts_allocated_size, + &msc->ctts_allocated_size, ctts_data_old[ctts_index_old].count - edit_list_start_ctts_sample, ctts_data_old[ctts_index_old].duration) == -1) { av_log(mov->fc, AV_LOG_ERROR, "Cannot add CTTS entry %"PRId64" - {%"PRId64", %d}\n", @@ -3289,7 +3291,7 @@ static void mov_fix_index(MOVContext *mov, AVStream *st) if (ctts_data_old && ctts_sample_old != 0) { if (add_ctts_entry(&msc->ctts_data, &msc->ctts_count, - &ctts_allocated_size, + &msc->ctts_allocated_size, ctts_sample_old - edit_list_start_ctts_sample, ctts_data_old[ctts_index_old].duration) == -1) { av_log(mov->fc, AV_LOG_ERROR, "Cannot add CTTS entry %"PRId64" - {%"PRId64", %d}\n", @@ -4259,7 +4261,7 @@ static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom) int64_t dts; int data_offset = 0; unsigned entries, first_sample_flags = frag->flags; - int flags, distance, i, err; + int flags, distance, i; for (i = 0; i < c->fc->nb_streams; i++) { if (c->fc->streams[i]->id == frag->track_id) { @@ -4287,21 +4289,20 @@ static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom) if (!sc->ctts_count && sc->sample_count) { /* Complement ctts table if moov atom doesn't have ctts atom. */ - ctts_data = av_realloc(NULL, sizeof(*sc->ctts_data)); + ctts_data = av_fast_realloc(NULL, &sc->ctts_allocated_size, sizeof(*sc->ctts_data) * sc->sample_count); if (!ctts_data) return AVERROR(ENOMEM); + /* Don't use a count greater than 1 here since it will leave a gap in + * the ctts index which the code below relies on being sequential. */ sc->ctts_data = ctts_data; - sc->ctts_data[sc->ctts_count].count = sc->sample_count; - sc->ctts_data[sc->ctts_count].duration = 0; - sc->ctts_count++; + for (i = 0; i < sc->sample_count; i++) { + sc->ctts_data[sc->ctts_count].count = 1; + sc->ctts_data[sc->ctts_count].duration = 0; + sc->ctts_count++; + } } if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data)) return AVERROR_INVALIDDATA; - if ((err = av_reallocp_array(&sc->ctts_data, entries + sc->ctts_count, - sizeof(*sc->ctts_data))) < 0) { - sc->ctts_count = 0; - return err; - } if (flags & MOV_TRUN_DATA_OFFSET) data_offset = avio_rb32(pb); if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS) first_sample_flags = avio_rb32(pb); dts = sc->track_end - sc->time_offset; @@ -4312,26 +4313,28 @@ static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom) unsigned sample_size = frag->size; int sample_flags = i ? frag->flags : first_sample_flags; unsigned sample_duration = frag->duration; + unsigned ctts_duration = 0; int keyframe = 0; + int ctts_index = 0; + int old_nb_index_entries = st->nb_index_entries; if (flags & MOV_TRUN_SAMPLE_DURATION) sample_duration = avio_rb32(pb); if (flags & MOV_TRUN_SAMPLE_SIZE) sample_size = avio_rb32(pb); if (flags & MOV_TRUN_SAMPLE_FLAGS) sample_flags = avio_rb32(pb); - sc->ctts_data[sc->ctts_count].count = 1; - sc->ctts_data[sc->ctts_count].duration = (flags & MOV_TRUN_SAMPLE_CTS) ? - avio_rb32(pb) : 0; - mov_update_dts_shift(sc, sc->ctts_data[sc->ctts_count].duration); + if (flags & MOV_TRUN_SAMPLE_CTS) ctts_duration = avio_rb32(pb); + + mov_update_dts_shift(sc, ctts_duration); if (frag->time != AV_NOPTS_VALUE) { if (c->use_mfra_for == FF_MOV_FLAG_MFRA_PTS) { int64_t pts = frag->time; av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64 " sc->dts_shift %d ctts.duration %d" " sc->time_offset %"PRId64" flags & MOV_TRUN_SAMPLE_CTS %d\n", pts, - sc->dts_shift, sc->ctts_data[sc->ctts_count].duration, + sc->dts_shift, ctts_duration, sc->time_offset, flags & MOV_TRUN_SAMPLE_CTS); dts = pts - sc->dts_shift; if (flags & MOV_TRUN_SAMPLE_CTS) { - dts -= sc->ctts_data[sc->ctts_count].duration; + dts -= ctts_duration; } else { dts -= sc->time_offset; } @@ -4343,7 +4346,7 @@ static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom) } frag->time = AV_NOPTS_VALUE; } - sc->ctts_count++; + if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) keyframe = 1; else @@ -4352,11 +4355,31 @@ static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom) MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES)); if (keyframe) distance = 0; - err = av_add_index_entry(st, offset, dts, sample_size, distance, - keyframe ? AVINDEX_KEYFRAME : 0); - if (err < 0) { + ctts_index = av_add_index_entry(st, offset, dts, sample_size, distance, + keyframe ? AVINDEX_KEYFRAME : 0); + if (ctts_index >= 0 && old_nb_index_entries < st->nb_index_entries) { + unsigned int size_needed = st->nb_index_entries * sizeof(*sc->ctts_data); + unsigned int request_size = size_needed > sc->ctts_allocated_size ? + FFMAX(size_needed, 2 * sc->ctts_allocated_size) : size_needed; + ctts_data = av_fast_realloc(sc->ctts_data, &sc->ctts_allocated_size, request_size); + if (!ctts_data) { + av_freep(&sc->ctts_data); + return AVERROR(ENOMEM); + } + + sc->ctts_data = ctts_data; + if (ctts_index != old_nb_index_entries) { + memmove(sc->ctts_data + ctts_index + 1, sc->ctts_data + ctts_index, + sizeof(*sc->ctts_data) * (sc->ctts_count - ctts_index)); + } + + sc->ctts_data[ctts_index].count = 1; + sc->ctts_data[ctts_index].duration = ctts_duration; + sc->ctts_count++; + } else { av_log(c->fc, AV_LOG_ERROR, "Failed to add index entry\n"); } + av_log(c->fc, AV_LOG_TRACE, "AVIndex stream %d, sample %u, offset %"PRIx64", dts %"PRId64", " "size %u, distance %d, keyframe %d\n", st->index, sc->sample_count+i, offset, dts, sample_size, distance, keyframe); diff --git a/tests/fate/seek.mak b/tests/fate/seek.mak index f835da5226..1a6e584987 100644 --- a/tests/fate/seek.mak +++ b/tests/fate/seek.mak @@ -248,7 +248,10 @@ FATE_SEEK += $(FATE_SEEK_LAVF-yes:%=fate-seek-lavf-%) FATE_SEEK_EXTRA-$(CONFIG_MP3_DEMUXER) += fate-seek-extra-mp3 FATE_SEEK_EXTRA-$(call ALLYES, CACHE_PROTOCOL PIPE_PROTOCOL MP3_DEMUXER) += fate-seek-cache-pipe FATE_SEEK_EXTRA-$(CONFIG_MATROSKA_DEMUXER) += fate-seek-mkv-codec-delay +FATE_SEEK_EXTRA-$(CONFIG_MOV_DEMUXER) += fate-seek-extra-mp4 + fate-seek-extra-mp3: CMD = run libavformat/tests/seek$(EXESUF) $(TARGET_SAMPLES)/gapless/gapless.mp3 -fastseek 1 +fate-seek-extra-mp4: CMD = run libavformat/tests/seek$(EXESUF) $(TARGET_SAMPLES)/mov/buck480p30_na.mp4 -duration 180 -frames 4 fate-seek-cache-pipe: CMD = cat $(TARGET_SAMPLES)/gapless/gapless.mp3 | run libavformat/tests/seek$(EXESUF) cache:pipe:0 -read_ahead_limit -1 fate-seek-mkv-codec-delay: CMD = run libavformat/tests/seek$(EXESUF) $(TARGET_SAMPLES)/mkv/codec_delay_opus.mkv diff --git a/tests/ref/seek/extra-mp4 b/tests/ref/seek/extra-mp4 new file mode 100644 index 0000000000..c25544c095 --- /dev/null +++ b/tests/ref/seek/extra-mp4 @@ -0,0 +1,134 @@ +ret: 0 st: 0 flags:1 dts:-0.033333 pts: 0.000000 pos: 1287 size: 183 +ret: 0 st: 0 flags:0 dts: 0.000000 pts: 0.033333 pos: 1470 size: 24 +ret: 0 st: 0 flags:0 dts: 0.033333 pts: 0.066667 pos: 1494 size: 6779 +ret: 0 st: 0 flags:0 dts: 0.066667 pts: 0.100000 pos: 8273 size: 11041 +ret: 0 st:-1 flags:0 ts:-1.000000 +ret: 0 st: 0 flags:1 dts:-0.033333 pts: 0.000000 pos: 1287 size: 183 +ret: 0 st: 0 flags:0 dts: 0.000000 pts: 0.033333 pos: 1470 size: 24 +ret: 0 st: 0 flags:0 dts: 0.033333 pts: 0.066667 pos: 1494 size: 6779 +ret: 0 st: 0 flags:0 dts: 0.066667 pts: 0.100000 pos: 8273 size: 11041 +ret: 0 st:-1 flags:1 ts: 101.894167 +ret: 0 st: 0 flags:1 dts: 101.300000 pts: 101.333333 pos:10982311 size: 67237 +ret: 0 st: 0 flags:0 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