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-rw-r--r--toolkit/components/mediasniffer/components.conf20
-rw-r--r--toolkit/components/mediasniffer/moz.build33
-rw-r--r--toolkit/components/mediasniffer/mp3sniff.c156
-rw-r--r--toolkit/components/mediasniffer/mp3sniff.h15
-rw-r--r--toolkit/components/mediasniffer/nsMediaSniffer.cpp261
-rw-r--r--toolkit/components/mediasniffer/nsMediaSniffer.h50
-rw-r--r--toolkit/components/mediasniffer/test/unit/data/bug1079747.mp4bin0 -> 512 bytes
-rw-r--r--toolkit/components/mediasniffer/test/unit/data/bug1725190.cr3bin0 -> 24 bytes
-rw-r--r--toolkit/components/mediasniffer/test/unit/data/detodos.mp3bin0 -> 512 bytes
-rw-r--r--toolkit/components/mediasniffer/test/unit/data/ff-inst.exebin0 -> 512 bytes
-rw-r--r--toolkit/components/mediasniffer/test/unit/data/file.mkvbin0 -> 512 bytes
-rw-r--r--toolkit/components/mediasniffer/test/unit/data/file.webmbin0 -> 512 bytes
-rw-r--r--toolkit/components/mediasniffer/test/unit/data/fl10.mp2bin0 -> 512 bytes
-rw-r--r--toolkit/components/mediasniffer/test/unit/data/he_free.mp3bin0 -> 512 bytes
-rw-r--r--toolkit/components/mediasniffer/test/unit/data/id3tags.mp3bin0 -> 512 bytes
-rw-r--r--toolkit/components/mediasniffer/test/unit/data/mp3-in-riff.wavbin0 -> 512 bytes
-rw-r--r--toolkit/components/mediasniffer/test/unit/data/notags-bad.mp3bin0 -> 512 bytes
-rw-r--r--toolkit/components/mediasniffer/test/unit/data/notags-scan.mp3bin0 -> 512 bytes
-rw-r--r--toolkit/components/mediasniffer/test/unit/data/notags.mp3bin0 -> 512 bytes
-rw-r--r--toolkit/components/mediasniffer/test/unit/test_mediasniffer.js125
-rw-r--r--toolkit/components/mediasniffer/test/unit/test_mediasniffer_ext.js135
-rw-r--r--toolkit/components/mediasniffer/test/unit/xpcshell.toml22
22 files changed, 817 insertions, 0 deletions
diff --git a/toolkit/components/mediasniffer/components.conf b/toolkit/components/mediasniffer/components.conf
new file mode 100644
index 0000000000..ba3c89b942
--- /dev/null
+++ b/toolkit/components/mediasniffer/components.conf
@@ -0,0 +1,20 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+Classes = [
+ {
+ 'cid': '{3fdd6c28-5b87-4e3e-8b57-8e83c23c1a6d}',
+ 'contract_ids': ['@mozilla.org/media/sniffer;1'],
+ 'type': 'nsMediaSniffer',
+ 'headers': ['nsMediaSniffer.h'],
+ 'categories': {
+ 'content-sniffing-services': '@mozilla.org/media/sniffer;1',
+ 'net-content-sniffers': '@mozilla.org/media/sniffer;1',
+ 'orb-content-sniffers': '@mozilla.org/media/sniffer;1',
+ 'net-and-orb-content-sniffers': '@mozilla.org/media/sniffer;1',
+ },
+ },
+]
diff --git a/toolkit/components/mediasniffer/moz.build b/toolkit/components/mediasniffer/moz.build
new file mode 100644
index 0000000000..5557740106
--- /dev/null
+++ b/toolkit/components/mediasniffer/moz.build
@@ -0,0 +1,33 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+XPCSHELL_TESTS_MANIFESTS += ["test/unit/xpcshell.toml"]
+
+EXPORTS += [
+ "nsMediaSniffer.h",
+]
+
+UNIFIED_SOURCES += [
+ "mp3sniff.c",
+ "nsMediaSniffer.cpp",
+]
+
+XPCOM_MANIFESTS += [
+ "components.conf",
+]
+
+FINAL_LIBRARY = "xul"
+
+with Files("**"):
+ BUG_COMPONENT = ("Core", "Audio/Video")
+
+include("/ipc/chromium/chromium-config.mozbuild")
+
+LOCAL_INCLUDES += [
+ # For nsHttpChannel.h
+ "/netwerk/base",
+ "/netwerk/protocol/http",
+]
diff --git a/toolkit/components/mediasniffer/mp3sniff.c b/toolkit/components/mediasniffer/mp3sniff.c
new file mode 100644
index 0000000000..cb1e2fdc1d
--- /dev/null
+++ b/toolkit/components/mediasniffer/mp3sniff.c
@@ -0,0 +1,156 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* MPEG format parsing */
+
+#include "mp3sniff.h"
+
+/* Maximum packet size is 320 kbits/s * 144 / 32 kHz + 1 padding byte */
+#define MP3_MAX_SIZE 1441
+
+typedef struct {
+ int version;
+ int layer;
+ int errp;
+ int bitrate;
+ int freq;
+ int pad;
+ int priv;
+ int mode;
+ int modex;
+ int copyright;
+ int original;
+ int emphasis;
+} mp3_header;
+
+/* Parse the 4-byte header in p and fill in the header struct. */
+static void mp3_parse(const uint8_t* p, mp3_header* header) {
+ const int bitrates[2][16] = {
+ /* MPEG version 1 layer 3 bitrates. */
+ {0, 32000, 40000, 48000, 56000, 64000, 80000, 96000, 112000, 128000,
+ 160000, 192000, 224000, 256000, 320000, 0},
+ /* MPEG Version 2 and 2.5 layer 3 bitrates */
+ {0, 8000, 16000, 24000, 32000, 40000, 48000, 56000, 64000, 80000, 96000,
+ 112000, 128000, 144000, 160000, 0}};
+ const int samplerates[4] = {44100, 48000, 32000, 0};
+
+ header->version = (p[1] & 0x18) >> 3;
+ header->layer = 4 - ((p[1] & 0x06) >> 1);
+ header->errp = (p[1] & 0x01);
+
+ header->bitrate = bitrates[(header->version & 1) ? 0 : 1][(p[2] & 0xf0) >> 4];
+ header->freq = samplerates[(p[2] & 0x0c) >> 2];
+ if (header->version == 2)
+ header->freq >>= 1;
+ else if (header->version == 0)
+ header->freq >>= 2;
+ header->pad = (p[2] & 0x02) >> 1;
+ header->priv = (p[2] & 0x01);
+
+ header->mode = (p[3] & 0xc0) >> 6;
+ header->modex = (p[3] & 0x30) >> 4;
+ header->copyright = (p[3] & 0x08) >> 3;
+ header->original = (p[3] & 0x04) >> 2;
+ header->emphasis = (p[3] & 0x03);
+}
+
+/* calculate the size of an mp3 frame from its header */
+static int mp3_framesize(mp3_header* header) {
+ int size;
+ int scale;
+
+ if ((header->version & 1) == 0)
+ scale = 72;
+ else
+ scale = 144;
+ size = header->bitrate * scale / header->freq;
+ if (header->pad) size += 1;
+
+ return size;
+}
+
+static int is_mp3(const uint8_t* p, long length) {
+ /* Do we have enough room to see a 4 byte header? */
+ if (length < 4) return 0;
+ /* Do we have a sync pattern? */
+ if (p[0] == 0xff && (p[1] & 0xe0) == 0xe0) {
+ /* Do we have any illegal field values? */
+ if (((p[1] & 0x06) >> 1) == 0) return 0; /* No layer 4 */
+ if (((p[2] & 0xf0) >> 4) == 15) return 0; /* Bitrate can't be 1111 */
+ if (((p[2] & 0x0c) >> 2) == 3) return 0; /* Samplerate can't be 11 */
+ /* Looks like a header. */
+ if ((4 - ((p[1] & 0x06) >> 1)) != 3) return 0; /* Only want level 3 */
+ return 1;
+ }
+ return 0;
+}
+
+/* Identify an ID3 tag based on its header. */
+/* http://id3.org/id3v2.4.0-structure */
+static int is_id3(const uint8_t* p, long length) {
+ /* Do we have enough room to see the header? */
+ if (length < 10) return 0;
+ /* Do we have a sync pattern? */
+ if (p[0] == 'I' && p[1] == 'D' && p[2] == '3') {
+ if (p[3] == 0xff || p[4] == 0xff) return 0; /* Illegal version. */
+ if (p[6] & 0x80 || p[7] & 0x80 || p[8] & 0x80)
+ return 0; /* Bad length encoding. */
+ /* Looks like an id3 header. */
+ return 1;
+ }
+ return 0;
+}
+
+/* Calculate the size of an id3 tag structure from its header. */
+static int id3_framesize(const uint8_t* p, long length) {
+ int size;
+
+ /* Header is 10 bytes. */
+ if (length < 10) {
+ return 0;
+ }
+ /* Frame is header plus declared size. */
+ size = 10 + (p[9] | (p[8] << 7) | (p[7] << 14) | (p[6] << 21));
+
+ return size;
+}
+
+int mp3_sniff(const uint8_t* buf, long length) {
+ mp3_header header;
+ const uint8_t* p;
+ long skip;
+ long avail;
+
+ p = buf;
+ avail = length;
+ while (avail >= 4) {
+ if (is_id3(p, avail)) {
+ /* Skip over any id3 tags */
+ skip = id3_framesize(p, avail);
+ p += skip;
+ avail -= skip;
+ } else if (is_mp3(p, avail)) {
+ mp3_parse(p, &header);
+ skip = mp3_framesize(&header);
+ if (skip < 4 || skip + 4 >= avail) {
+ return 0;
+ }
+ p += skip;
+ avail -= skip;
+ /* Check for a second header at the expected offset. */
+ if (is_mp3(p, avail)) {
+ /* Looks like mp3. */
+ return 1;
+ } else {
+ /* No second header. Not mp3. */
+ return 0;
+ }
+ } else {
+ /* No id3 tag or mp3 header. Not mp3. */
+ return 0;
+ }
+ }
+
+ return 0;
+}
diff --git a/toolkit/components/mediasniffer/mp3sniff.h b/toolkit/components/mediasniffer/mp3sniff.h
new file mode 100644
index 0000000000..b189db1873
--- /dev/null
+++ b/toolkit/components/mediasniffer/mp3sniff.h
@@ -0,0 +1,15 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int mp3_sniff(const uint8_t* buf, long length);
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/toolkit/components/mediasniffer/nsMediaSniffer.cpp b/toolkit/components/mediasniffer/nsMediaSniffer.cpp
new file mode 100644
index 0000000000..e1851d3276
--- /dev/null
+++ b/toolkit/components/mediasniffer/nsMediaSniffer.cpp
@@ -0,0 +1,261 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 tw=80 et cindent: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "ADTSDemuxer.h"
+#include "mozilla/ArrayUtils.h"
+#include "mozilla/ModuleUtils.h"
+#include "mozilla/ScopeExit.h"
+#include "mozilla/StaticPrefs_media.h"
+#include "mozilla/Telemetry.h"
+#include "mp3sniff.h"
+#include "nestegg/nestegg.h"
+#include "nsHttpChannel.h"
+#include "nsIClassInfoImpl.h"
+#include "nsIChannel.h"
+#include "nsMediaSniffer.h"
+#include "nsMimeTypes.h"
+#include "nsQueryObject.h"
+#include "nsString.h"
+
+#include <algorithm>
+
+// The minimum number of bytes that are needed to attempt to sniff an mp4 file.
+static const unsigned MP4_MIN_BYTES_COUNT = 12;
+// The maximum number of bytes to consider when attempting to sniff a file.
+static const uint32_t MAX_BYTES_SNIFFED = 512;
+// The maximum number of bytes to consider when attempting to sniff for a mp3
+// bitstream.
+// This is 320kbps * 144 / 32kHz + 1 padding byte + 4 bytes of capture pattern.
+static const uint32_t MAX_BYTES_SNIFFED_MP3 = 320 * 144 / 32 + 1 + 4;
+// Multi-channel low sample-rate AAC packets can be huge, have a higher maximum
+// size.
+static const uint32_t MAX_BYTES_SNIFFED_ADTS = 8096;
+
+NS_IMPL_ISUPPORTS(nsMediaSniffer, nsIContentSniffer)
+
+nsMediaSnifferEntry nsMediaSniffer::sSnifferEntries[] = {
+ // The string OggS, followed by the null byte.
+ PATTERN_ENTRY("\xFF\xFF\xFF\xFF\xFF", "OggS", APPLICATION_OGG),
+ // The string RIFF, followed by four bytes, followed by the string WAVE,
+ // followed by 8 bytes, followed by 0x0055, the codec identifier for mp3 in
+ // a RIFF container. This entry MUST be before the next one, which is
+ // assumed to be a WAV file containing PCM data.
+ PATTERN_ENTRY("\xFF\xFF\xFF\xFF"
+ "\x00\x00\x00\x00"
+ "\xFF\xFF\xFF\xFF"
+ "\x00\x00\x00\x00"
+ "\x00\x00\x00\x00"
+ "\xFF\xFF",
+ "RIFF"
+ "\x00\x00\x00\x00"
+ "WAVE"
+ "\x00\x00\x00\x00"
+ "\x00\x00\x00\x00"
+ "\x55\x00",
+ AUDIO_MP3),
+ // The string RIFF, followed by four bytes, followed by the string WAVE
+ PATTERN_ENTRY("\xFF\xFF\xFF\xFF\x00\x00\x00\x00\xFF\xFF\xFF\xFF",
+ "RIFF\x00\x00\x00\x00WAVE", AUDIO_WAV),
+ // mp3 with ID3 tags, the string "ID3".
+ PATTERN_ENTRY("\xFF\xFF\xFF", "ID3", AUDIO_MP3),
+ // FLAC with standard header
+ PATTERN_ENTRY("\xFF\xFF\xFF\xFF", "fLaC", AUDIO_FLAC),
+ PATTERN_ENTRY("\xFF\xFF\xFF\xFF\xFF\xFF\xFF", "#EXTM3U",
+ APPLICATION_MPEGURL)};
+
+using PatternLabel = mozilla::Telemetry::LABELS_MEDIA_SNIFFER_MP4_BRAND_PATTERN;
+
+struct nsMediaSnifferFtypEntry : nsMediaSnifferEntry {
+ nsMediaSnifferFtypEntry(nsMediaSnifferEntry aBase, const PatternLabel aLabel)
+ : nsMediaSnifferEntry(aBase), mLabel(aLabel) {}
+ PatternLabel mLabel;
+};
+
+// For a complete list of file types, see http://www.ftyps.com/index.html
+nsMediaSnifferFtypEntry sFtypEntries[] = {
+ {PATTERN_ENTRY("\xFF\xFF\xFF", "mp4", VIDEO_MP4),
+ PatternLabel::ftyp_mp4}, // Could be mp41 or mp42.
+ {PATTERN_ENTRY("\xFF\xFF\xFF", "avc", VIDEO_MP4),
+ PatternLabel::ftyp_avc}, // Could be avc1, avc2, ...
+ {PATTERN_ENTRY("\xFF\xFF\xFF\xFF", "3gp4", VIDEO_MP4),
+ PatternLabel::ftyp_3gp4}, // 3gp4 is based on MP4
+ {PATTERN_ENTRY("\xFF\xFF\xFF", "3gp", VIDEO_3GPP),
+ PatternLabel::ftyp_3gp}, // Could be 3gp5, ...
+ {PATTERN_ENTRY("\xFF\xFF\xFF", "M4V", VIDEO_MP4), PatternLabel::ftyp_M4V},
+ {PATTERN_ENTRY("\xFF\xFF\xFF", "M4A", AUDIO_MP4), PatternLabel::ftyp_M4A},
+ {PATTERN_ENTRY("\xFF\xFF\xFF", "M4P", AUDIO_MP4), PatternLabel::ftyp_M4P},
+ {PATTERN_ENTRY("\xFF\xFF", "qt", VIDEO_QUICKTIME), PatternLabel::ftyp_qt},
+ {PATTERN_ENTRY("\xFF\xFF\xFF", "crx", APPLICATION_OCTET_STREAM),
+ PatternLabel::ftyp_crx},
+ {PATTERN_ENTRY("\xFF\xFF\xFF", "iso", VIDEO_MP4),
+ PatternLabel::ftyp_iso}, // Could be isom or iso2.
+ {PATTERN_ENTRY("\xFF\xFF\xFF\xFF", "mmp4", VIDEO_MP4),
+ PatternLabel::ftyp_mmp4},
+ {PATTERN_ENTRY("\xFF\xFF\xFF\xFF", "avif", IMAGE_AVIF),
+ PatternLabel::ftyp_avif},
+};
+
+static bool MatchesBrands(const uint8_t aData[4], nsACString& aSniffedType) {
+ for (const auto& currentEntry : sFtypEntries) {
+ bool matched = true;
+ MOZ_ASSERT(currentEntry.mLength <= 4,
+ "Pattern is too large to match brand strings.");
+ for (uint32_t j = 0; j < currentEntry.mLength; ++j) {
+ if ((currentEntry.mMask[j] & aData[j]) != currentEntry.mPattern[j]) {
+ matched = false;
+ break;
+ }
+ }
+ if (matched) {
+ // If we eventually remove the "iso" pattern entry per bug 1725190,
+ // this block should be removed and the bug1725190.cr3 test in
+ // test_mediasniffer_ext.js will need to be updated
+ if (!mozilla::StaticPrefs::media_mp4_sniff_iso_brand() &&
+ currentEntry.mLabel == PatternLabel::ftyp_iso) {
+ continue;
+ }
+
+ aSniffedType.AssignASCII(currentEntry.mContentType);
+ AccumulateCategorical(currentEntry.mLabel);
+ return true;
+ }
+ }
+
+ return false;
+}
+
+// This function implements sniffing algorithm for MP4 family file types,
+// including MP4 (described at
+// http://mimesniff.spec.whatwg.org/#signature-for-mp4), M4A (Apple iTunes
+// audio), and 3GPP.
+bool MatchesMP4(const uint8_t* aData, const uint32_t aLength,
+ nsACString& aSniffedType) {
+ if (aLength <= MP4_MIN_BYTES_COUNT) {
+ return false;
+ }
+ // Conversion from big endian to host byte order.
+ uint32_t boxSize =
+ (uint32_t)(aData[3] | aData[2] << 8 | aData[1] << 16 | aData[0] << 24);
+
+ // Boxsize should be evenly divisible by 4.
+ if (boxSize % 4 || aLength < boxSize) {
+ return false;
+ }
+ // The string "ftyp".
+ if (aData[4] != 0x66 || aData[5] != 0x74 || aData[6] != 0x79 ||
+ aData[7] != 0x70) {
+ return false;
+ }
+ if (MatchesBrands(&aData[8], aSniffedType)) {
+ return true;
+ }
+ // Skip minor_version (bytes 12-15).
+ uint32_t bytesRead = 16;
+ while (bytesRead < boxSize) {
+ if (MatchesBrands(&aData[bytesRead], aSniffedType)) {
+ return true;
+ }
+ bytesRead += 4;
+ }
+
+ return false;
+}
+
+static bool MatchesWebM(const uint8_t* aData, const uint32_t aLength) {
+ return nestegg_sniff((uint8_t*)aData, aLength);
+}
+
+// This function implements mp3 sniffing based on parsing
+// packet headers and looking for expected boundaries.
+static bool MatchesMP3(const uint8_t* aData, const uint32_t aLength) {
+ return mp3_sniff(aData, (long)aLength);
+}
+
+static bool MatchesADTS(const uint8_t* aData, const uint32_t aLength) {
+ return mozilla::ADTSDemuxer::ADTSSniffer(aData, aLength);
+}
+
+NS_IMETHODIMP
+nsMediaSniffer::GetMIMETypeFromContent(nsIRequest* aRequest,
+ const uint8_t* aData,
+ const uint32_t aLength,
+ nsACString& aSniffedType) {
+ const uint32_t clampedLength = std::min(aLength, MAX_BYTES_SNIFFED);
+
+ nsCOMPtr<nsIChannel> channel = do_QueryInterface(aRequest);
+
+ auto maybeUpdate = mozilla::MakeScopeExit([channel]() {
+ if (channel && XRE_IsParentProcess()) {
+ if (RefPtr<mozilla::net::nsHttpChannel> httpChannel =
+ do_QueryObject(channel)) {
+ // If the audio or video type pattern matching algorithm given bytes
+ // does not return undefined, then disable the further check and allow
+ // the response.
+ httpChannel->DisableIsOpaqueResponseAllowedAfterSniffCheck(
+ mozilla::net::nsHttpChannel::SnifferType::Media);
+ }
+ };
+ });
+
+ // Check if this is a toplevel document served as application/octet-stream
+ // to disable sniffing and allow the file to download. See: Bug 1828441
+ if (channel && XRE_IsParentProcess()) {
+ nsCOMPtr<nsILoadInfo> loadInfo = channel->LoadInfo();
+ nsAutoCString mimeType;
+ channel->GetContentType(mimeType);
+ if (mimeType.EqualsLiteral(APPLICATION_OCTET_STREAM) &&
+ loadInfo->GetExternalContentPolicyType() ==
+ ExtContentPolicy::TYPE_DOCUMENT) {
+ aSniffedType.AssignLiteral(APPLICATION_OCTET_STREAM);
+ maybeUpdate.release();
+ return NS_ERROR_NOT_AVAILABLE;
+ }
+ }
+
+ for (const auto& currentEntry : sSnifferEntries) {
+ if (clampedLength < currentEntry.mLength || currentEntry.mLength == 0) {
+ continue;
+ }
+ bool matched = true;
+ for (uint32_t j = 0; j < currentEntry.mLength; ++j) {
+ if ((currentEntry.mMask[j] & aData[j]) != currentEntry.mPattern[j]) {
+ matched = false;
+ break;
+ }
+ }
+ if (matched) {
+ aSniffedType.AssignASCII(currentEntry.mContentType);
+ return NS_OK;
+ }
+ }
+
+ if (MatchesMP4(aData, clampedLength, aSniffedType)) {
+ return NS_OK;
+ }
+
+ if (MatchesWebM(aData, clampedLength)) {
+ aSniffedType.AssignLiteral(VIDEO_WEBM);
+ return NS_OK;
+ }
+
+ // Bug 950023: 512 bytes are often not enough to sniff for mp3.
+ if (MatchesMP3(aData, std::min(aLength, MAX_BYTES_SNIFFED_MP3))) {
+ aSniffedType.AssignLiteral(AUDIO_MP3);
+ return NS_OK;
+ }
+
+ if (MatchesADTS(aData, std::min(aLength, MAX_BYTES_SNIFFED_ADTS))) {
+ aSniffedType.AssignLiteral(AUDIO_AAC);
+ return NS_OK;
+ }
+
+ maybeUpdate.release();
+
+ // Could not sniff the media type, we are required to set it to
+ // application/octet-stream.
+ aSniffedType.AssignLiteral(APPLICATION_OCTET_STREAM);
+ return NS_ERROR_NOT_AVAILABLE;
+}
diff --git a/toolkit/components/mediasniffer/nsMediaSniffer.h b/toolkit/components/mediasniffer/nsMediaSniffer.h
new file mode 100644
index 0000000000..9608e2e643
--- /dev/null
+++ b/toolkit/components/mediasniffer/nsMediaSniffer.h
@@ -0,0 +1,50 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 tw=80 et cindent: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef nsMediaSniffer_h
+#define nsMediaSniffer_h
+
+#include "nsIContentSniffer.h"
+#include "mozilla/Attributes.h"
+
+// ed905ba3-c656-480e-934e-6bc35bd36aff
+#define NS_MEDIA_SNIFFER_CID \
+ { \
+ 0x3fdd6c28, 0x5b87, 0x4e3e, { \
+ 0x8b, 0x57, 0x8e, 0x83, 0xc2, 0x3c, 0x1a, 0x6d \
+ } \
+ }
+
+#define NS_MEDIA_SNIFFER_CONTRACTID "@mozilla.org/media/sniffer;1"
+
+#define PATTERN_ENTRY(mask, pattern, contentType) \
+ { \
+ (const uint8_t*)mask, (const uint8_t*)pattern, sizeof(mask) - 1, \
+ contentType \
+ }
+
+struct nsMediaSnifferEntry {
+ const uint8_t* mMask;
+ const uint8_t* mPattern;
+ const uint32_t mLength;
+ const char* mContentType;
+};
+
+bool MatchesMP4(const uint8_t* aData, const uint32_t aLength,
+ nsACString& aSniffedType);
+
+class nsMediaSniffer final : public nsIContentSniffer {
+ public:
+ NS_DECL_ISUPPORTS
+ NS_DECL_NSICONTENTSNIFFER
+
+ private:
+ ~nsMediaSniffer() = default;
+
+ static nsMediaSnifferEntry sSnifferEntries[];
+};
+
+#endif
diff --git a/toolkit/components/mediasniffer/test/unit/data/bug1079747.mp4 b/toolkit/components/mediasniffer/test/unit/data/bug1079747.mp4
new file mode 100644
index 0000000000..f00731d7e2
--- /dev/null
+++ b/toolkit/components/mediasniffer/test/unit/data/bug1079747.mp4
Binary files differ
diff --git a/toolkit/components/mediasniffer/test/unit/data/bug1725190.cr3 b/toolkit/components/mediasniffer/test/unit/data/bug1725190.cr3
new file mode 100644
index 0000000000..4e46f36b1d
--- /dev/null
+++ b/toolkit/components/mediasniffer/test/unit/data/bug1725190.cr3
Binary files differ
diff --git a/toolkit/components/mediasniffer/test/unit/data/detodos.mp3 b/toolkit/components/mediasniffer/test/unit/data/detodos.mp3
new file mode 100644
index 0000000000..12e3f89c20
--- /dev/null
+++ b/toolkit/components/mediasniffer/test/unit/data/detodos.mp3
Binary files differ
diff --git a/toolkit/components/mediasniffer/test/unit/data/ff-inst.exe b/toolkit/components/mediasniffer/test/unit/data/ff-inst.exe
new file mode 100644
index 0000000000..0f02f36e1a
--- /dev/null
+++ b/toolkit/components/mediasniffer/test/unit/data/ff-inst.exe
Binary files differ
diff --git a/toolkit/components/mediasniffer/test/unit/data/file.mkv b/toolkit/components/mediasniffer/test/unit/data/file.mkv
new file mode 100644
index 0000000000..4618cda032
--- /dev/null
+++ b/toolkit/components/mediasniffer/test/unit/data/file.mkv
Binary files differ
diff --git a/toolkit/components/mediasniffer/test/unit/data/file.webm b/toolkit/components/mediasniffer/test/unit/data/file.webm
new file mode 100644
index 0000000000..7bc738b8b4
--- /dev/null
+++ b/toolkit/components/mediasniffer/test/unit/data/file.webm
Binary files differ
diff --git a/toolkit/components/mediasniffer/test/unit/data/fl10.mp2 b/toolkit/components/mediasniffer/test/unit/data/fl10.mp2
new file mode 100644
index 0000000000..bf84d73675
--- /dev/null
+++ b/toolkit/components/mediasniffer/test/unit/data/fl10.mp2
Binary files differ
diff --git a/toolkit/components/mediasniffer/test/unit/data/he_free.mp3 b/toolkit/components/mediasniffer/test/unit/data/he_free.mp3
new file mode 100644
index 0000000000..e3da8e6a72
--- /dev/null
+++ b/toolkit/components/mediasniffer/test/unit/data/he_free.mp3
Binary files differ
diff --git a/toolkit/components/mediasniffer/test/unit/data/id3tags.mp3 b/toolkit/components/mediasniffer/test/unit/data/id3tags.mp3
new file mode 100644
index 0000000000..23091e6667
--- /dev/null
+++ b/toolkit/components/mediasniffer/test/unit/data/id3tags.mp3
Binary files differ
diff --git a/toolkit/components/mediasniffer/test/unit/data/mp3-in-riff.wav b/toolkit/components/mediasniffer/test/unit/data/mp3-in-riff.wav
new file mode 100644
index 0000000000..5ccaf351f3
--- /dev/null
+++ b/toolkit/components/mediasniffer/test/unit/data/mp3-in-riff.wav
Binary files differ
diff --git a/toolkit/components/mediasniffer/test/unit/data/notags-bad.mp3 b/toolkit/components/mediasniffer/test/unit/data/notags-bad.mp3
new file mode 100644
index 0000000000..5ad89786fa
--- /dev/null
+++ b/toolkit/components/mediasniffer/test/unit/data/notags-bad.mp3
Binary files differ
diff --git a/toolkit/components/mediasniffer/test/unit/data/notags-scan.mp3 b/toolkit/components/mediasniffer/test/unit/data/notags-scan.mp3
new file mode 100644
index 0000000000..949b7c4687
--- /dev/null
+++ b/toolkit/components/mediasniffer/test/unit/data/notags-scan.mp3
Binary files differ
diff --git a/toolkit/components/mediasniffer/test/unit/data/notags.mp3 b/toolkit/components/mediasniffer/test/unit/data/notags.mp3
new file mode 100644
index 0000000000..c7db943617
--- /dev/null
+++ b/toolkit/components/mediasniffer/test/unit/data/notags.mp3
Binary files differ
diff --git a/toolkit/components/mediasniffer/test/unit/test_mediasniffer.js b/toolkit/components/mediasniffer/test/unit/test_mediasniffer.js
new file mode 100644
index 0000000000..12aa56a855
--- /dev/null
+++ b/toolkit/components/mediasniffer/test/unit/test_mediasniffer.js
@@ -0,0 +1,125 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+const { HttpServer } = ChromeUtils.importESModule(
+ "resource://testing-common/httpd.sys.mjs"
+);
+const { NetUtil } = ChromeUtils.importESModule(
+ "resource://gre/modules/NetUtil.sys.mjs"
+);
+
+const PATH = "/file.meh";
+var httpserver = new HttpServer();
+
+// Each time, the data consist in a string that should be sniffed as Ogg.
+const data = "OggS\0meeeh.";
+var testRan = 0;
+
+// If the content-type is not present, or if it's application/octet-stream, it
+// should be sniffed to application/ogg by the media sniffer. Otherwise, it
+// should not be changed.
+const tests = [
+ // Those three first case are the case of a media loaded in a media element.
+ // All three should be sniffed.
+ {
+ contentType: "",
+ expectedContentType: "application/ogg",
+ flags:
+ Ci.nsIChannel.LOAD_CALL_CONTENT_SNIFFERS |
+ Ci.nsIChannel.LOAD_MEDIA_SNIFFER_OVERRIDES_CONTENT_TYPE,
+ },
+ {
+ contentType: "application/octet-stream",
+ expectedContentType: "application/ogg",
+ flags:
+ Ci.nsIChannel.LOAD_CALL_CONTENT_SNIFFERS |
+ Ci.nsIChannel.LOAD_MEDIA_SNIFFER_OVERRIDES_CONTENT_TYPE,
+ },
+ {
+ contentType: "application/something",
+ expectedContentType: "application/ogg",
+ flags:
+ Ci.nsIChannel.LOAD_CALL_CONTENT_SNIFFERS |
+ Ci.nsIChannel.LOAD_MEDIA_SNIFFER_OVERRIDES_CONTENT_TYPE,
+ },
+ // This last cases test the case of a channel opened while allowing content
+ // sniffers to override the content-type, like in the docshell.
+ {
+ contentType: "application/octet-stream",
+ expectedContentType: "application/ogg",
+ flags: Ci.nsIChannel.LOAD_CALL_CONTENT_SNIFFERS,
+ },
+ {
+ contentType: "",
+ expectedContentType: "application/ogg",
+ flags: Ci.nsIChannel.LOAD_CALL_CONTENT_SNIFFERS,
+ },
+ {
+ contentType: "application/something",
+ expectedContentType: "application/ogg",
+ flags: Ci.nsIChannel.LOAD_CALL_CONTENT_SNIFFERS,
+ },
+];
+
+// A basic listener that reads checks the if we sniffed properly.
+var listener = {
+ onStartRequest(request) {
+ Assert.equal(
+ request.QueryInterface(Ci.nsIChannel).contentType,
+ tests[testRan].expectedContentType
+ );
+ },
+
+ onDataAvailable(request, stream, offset, count) {
+ try {
+ var bis = Cc["@mozilla.org/binaryinputstream;1"].createInstance(
+ Ci.nsIBinaryInputStream
+ );
+ bis.setInputStream(stream);
+ bis.readByteArray(bis.available());
+ } catch (ex) {
+ do_throw("Error in onDataAvailable: " + ex);
+ }
+ },
+
+ onStopRequest(request, status) {
+ testRan++;
+ runNext();
+ },
+};
+
+function setupChannel(url, flags) {
+ let uri = "http://localhost:" + httpserver.identity.primaryPort + url;
+ var chan = NetUtil.newChannel({
+ uri,
+ loadUsingSystemPrincipal: true,
+ contentPolicyType: Ci.nsIContentPolicy.TYPE_MEDIA,
+ });
+ chan.loadFlags |= flags;
+ var httpChan = chan.QueryInterface(Ci.nsIHttpChannel);
+ return httpChan;
+}
+
+function runNext() {
+ if (testRan == tests.length) {
+ do_test_finished();
+ return;
+ }
+ var channel = setupChannel(PATH, tests[testRan].flags);
+ httpserver.registerPathHandler(PATH, function (request, response) {
+ response.setHeader("Content-Type", tests[testRan].contentType, false);
+ response.bodyOutputStream.write(data, data.length);
+ });
+ channel.asyncOpen(listener);
+}
+
+function run_test() {
+ httpserver.start(-1);
+ do_test_pending();
+ try {
+ runNext();
+ } catch (e) {
+ print("ERROR - " + e + "\n");
+ }
+}
diff --git a/toolkit/components/mediasniffer/test/unit/test_mediasniffer_ext.js b/toolkit/components/mediasniffer/test/unit/test_mediasniffer_ext.js
new file mode 100644
index 0000000000..f48ffbb75a
--- /dev/null
+++ b/toolkit/components/mediasniffer/test/unit/test_mediasniffer_ext.js
@@ -0,0 +1,135 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+var CC = Components.Constructor;
+
+var BinaryOutputStream = CC(
+ "@mozilla.org/binaryoutputstream;1",
+ "nsIBinaryOutputStream",
+ "setOutputStream"
+);
+
+const { HttpServer } = ChromeUtils.importESModule(
+ "resource://testing-common/httpd.sys.mjs"
+);
+const { NetUtil } = ChromeUtils.importESModule(
+ "resource://gre/modules/NetUtil.sys.mjs"
+);
+
+var httpserver = new HttpServer();
+
+var testRan = 0;
+
+// The tests files we want to test, and the type we should have after sniffing.
+const tests = [
+ // Real webm and mkv files truncated to 512 bytes.
+ { path: "data/file.webm", expected: "video/webm" },
+ { path: "data/file.mkv", expected: "application/octet-stream" },
+ // MP3 files with and without id3 headers truncated to 512 bytes.
+ // NB these have 208/209 byte frames, but mp3 can require up to
+ // 1445 bytes to detect with our method.
+ { path: "data/id3tags.mp3", expected: "audio/mpeg" },
+ { path: "data/notags.mp3", expected: "audio/mpeg" },
+ // MPEG-2 mp3 files.
+ { path: "data/detodos.mp3", expected: "audio/mpeg" },
+ // Padding bit flipped in the first header: sniffing should fail.
+ { path: "data/notags-bad.mp3", expected: "application/octet-stream" },
+ // Garbage before header: sniffing should fail.
+ { path: "data/notags-scan.mp3", expected: "application/octet-stream" },
+ // VBR from the layer III test patterns. We can't sniff this.
+ { path: "data/he_free.mp3", expected: "application/octet-stream" },
+ // Make sure we reject mp2, which has a similar header.
+ { path: "data/fl10.mp2", expected: "application/octet-stream" },
+ // Truncated ff installer regression test for bug 875769.
+ { path: "data/ff-inst.exe", expected: "application/octet-stream" },
+ // MP4 with invalid box size (0) for "ftyp".
+ { path: "data/bug1079747.mp4", expected: "application/octet-stream" },
+ // An MP3 bytestream in a RIFF container, truncated to 512 bytes.
+ { path: "data/mp3-in-riff.wav", expected: "audio/mpeg" },
+ // The sniffing-relevant portion of a Canon raw image
+ { path: "data/bug1725190.cr3", expected: "application/octet-stream" },
+];
+
+// A basic listener that reads checks the if we sniffed properly.
+var listener = {
+ onStartRequest(request) {
+ info("Sniffing " + tests[testRan].path);
+ Assert.equal(
+ request.QueryInterface(Ci.nsIChannel).contentType,
+ tests[testRan].expected
+ );
+ },
+
+ onDataAvailable(request, stream, offset, count) {
+ try {
+ var bis = Cc["@mozilla.org/binaryinputstream;1"].createInstance(
+ Ci.nsIBinaryInputStream
+ );
+ bis.setInputStream(stream);
+ bis.readByteArray(bis.available());
+ } catch (ex) {
+ do_throw("Error in onDataAvailable: " + ex);
+ }
+ },
+
+ onStopRequest(request, status) {
+ testRan++;
+ runNext();
+ },
+};
+
+function setupChannel(url) {
+ var chan = NetUtil.newChannel({
+ uri: "http://localhost:" + httpserver.identity.primaryPort + url,
+ loadUsingSystemPrincipal: true,
+ contentPolicyType: Ci.nsIContentPolicy.TYPE_MEDIA,
+ });
+ var httpChan = chan.QueryInterface(Ci.nsIHttpChannel);
+ return httpChan;
+}
+
+function runNext() {
+ if (testRan == tests.length) {
+ do_test_finished();
+ return;
+ }
+ var channel = setupChannel("/");
+ channel.asyncOpen(listener);
+}
+
+function getFileContents(aFile) {
+ var fileStream = Cc[
+ "@mozilla.org/network/file-input-stream;1"
+ ].createInstance(Ci.nsIFileInputStream);
+ fileStream.init(aFile, 1, -1, null);
+ var bis = Cc["@mozilla.org/binaryinputstream;1"].createInstance(
+ Ci.nsIBinaryInputStream
+ );
+ bis.setInputStream(fileStream);
+
+ var data = bis.readByteArray(bis.available());
+
+ return data;
+}
+
+function handler(metadata, response) {
+ response.setStatusLine(metadata.httpVersion, 200, "OK");
+ // Send an empty Content-Type, so we are guaranteed to sniff.
+ response.setHeader("Content-Type", "", false);
+ var body = getFileContents(do_get_file(tests[testRan].path));
+ var bos = new BinaryOutputStream(response.bodyOutputStream);
+ bos.writeByteArray(body);
+}
+
+function run_test() {
+ // We use a custom handler so we can change the header to force sniffing.
+ httpserver.registerPathHandler("/", handler);
+ httpserver.start(-1);
+ do_test_pending();
+ try {
+ runNext();
+ } catch (e) {
+ print("ERROR - " + e + "\n");
+ }
+}
diff --git a/toolkit/components/mediasniffer/test/unit/xpcshell.toml b/toolkit/components/mediasniffer/test/unit/xpcshell.toml
new file mode 100644
index 0000000000..196e6cea6c
--- /dev/null
+++ b/toolkit/components/mediasniffer/test/unit/xpcshell.toml
@@ -0,0 +1,22 @@
+[DEFAULT]
+head = ""
+skip-if = ["os == 'android'"]
+support-files = [
+ "data/bug1079747.mp4",
+ "data/bug1725190.cr3",
+ "data/detodos.mp3",
+ "data/ff-inst.exe",
+ "data/file.mkv",
+ "data/file.webm",
+ "data/fl10.mp2",
+ "data/he_free.mp3",
+ "data/id3tags.mp3",
+ "data/mp3-in-riff.wav",
+ "data/notags-bad.mp3",
+ "data/notags-scan.mp3",
+ "data/notags.mp3",
+]
+
+["test_mediasniffer.js"]
+
+["test_mediasniffer_ext.js"]