Add m-esr52 at 52.6.0

1 files changed, 178 insertions, 0 deletions

diff --git a/dom/media/platforms/ffmpeg/FFmpegLibWrapper.cpp b/dom/media/platforms/ffmpeg/FFmpegLibWrapper.cpp
new file mode 100644
index 000000000..f3dc00ad7
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/FFmpegLibWrapper.cpp
@@ -0,0 +1,178 @@
+/* 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 "FFmpegLibWrapper.h"
+#include "FFmpegLog.h"
+#include "MediaPrefs.h"
+#include "mozilla/PodOperations.h"
+#include "mozilla/Types.h"
+#include "prlink.h"
+
+#define AV_LOG_DEBUG    48
+
+namespace mozilla
+{
+
+FFmpegLibWrapper::FFmpegLibWrapper()
+{
+  PodZero(this);
+}
+
+FFmpegLibWrapper::~FFmpegLibWrapper()
+{
+  Unlink();
+}
+
+FFmpegLibWrapper::LinkResult
+FFmpegLibWrapper::Link()
+{
+  if (!mAVCodecLib || !mAVUtilLib) {
+    Unlink();
+    return LinkResult::NoProvidedLib;
+  }
+
+  avcodec_version =
+    (decltype(avcodec_version))PR_FindSymbol(mAVCodecLib, "avcodec_version");
+  if (!avcodec_version) {
+    Unlink();
+    return LinkResult::NoAVCodecVersion;
+  }
+  uint32_t version = avcodec_version();
+  uint32_t macro = (version >> 16) & 0xFFu;
+  mVersion = static_cast<int>(macro);
+  uint32_t micro = version & 0xFFu;
+  // A micro version >= 100 indicates that it's FFmpeg (as opposed to LibAV).
+  bool isFFMpeg = micro >= 100;
+  if (!isFFMpeg) {
+    if (macro == 57) {
+      // Due to current AVCodecContext binary incompatibility we can only
+      // support FFmpeg 57 at this stage.
+      Unlink();
+      return LinkResult::CannotUseLibAV57;
+    }
+#ifdef MOZ_FFMPEG
+    if (version < (54u << 16 | 35u << 8 | 1u)
+        && !MediaPrefs::LibavcodecAllowObsolete()) {
+      // Refuse any libavcodec version prior to 54.35.1.
+      // (Unless media.libavcodec.allow-obsolete==true)
+      Unlink();
+      return LinkResult::BlockedOldLibAVVersion;
+    }
+#endif
+  }
+
+  enum {
+    AV_FUNC_AVUTIL_MASK = 1 << 8,
+    AV_FUNC_53 = 1 << 0,
+    AV_FUNC_54 = 1 << 1,
+    AV_FUNC_55 = 1 << 2,
+    AV_FUNC_56 = 1 << 3,
+    AV_FUNC_57 = 1 << 4,
+    AV_FUNC_AVUTIL_53 = AV_FUNC_53 | AV_FUNC_AVUTIL_MASK,
+    AV_FUNC_AVUTIL_54 = AV_FUNC_54 | AV_FUNC_AVUTIL_MASK,
+    AV_FUNC_AVUTIL_55 = AV_FUNC_55 | AV_FUNC_AVUTIL_MASK,
+    AV_FUNC_AVUTIL_56 = AV_FUNC_56 | AV_FUNC_AVUTIL_MASK,
+    AV_FUNC_AVUTIL_57 = AV_FUNC_57 | AV_FUNC_AVUTIL_MASK,
+    AV_FUNC_AVCODEC_ALL = AV_FUNC_53 | AV_FUNC_54 | AV_FUNC_55 | AV_FUNC_56 | AV_FUNC_57,
+    AV_FUNC_AVUTIL_ALL = AV_FUNC_AVCODEC_ALL | AV_FUNC_AVUTIL_MASK
+  };
+
+  switch (macro) {
+    case 53:
+      version = AV_FUNC_53;
+      break;
+    case 54:
+      version = AV_FUNC_54;
+      break;
+    case 55:
+      version = AV_FUNC_55;
+      break;
+    case 56:
+      version = AV_FUNC_56;
+      break;
+    case 57:
+      version = AV_FUNC_57;
+      break;
+    default:
+      FFMPEG_LOG("Unknown avcodec version");
+      Unlink();
+      return isFFMpeg
+             ? ((macro > 57)
+                ? LinkResult::UnknownFutureFFMpegVersion
+                : LinkResult::UnknownOlderFFMpegVersion)
+             // All LibAV versions<54.35.1 are blocked, therefore we must be
+             // dealing with a later one.
+             : LinkResult::UnknownFutureLibAVVersion;
+  }
+
+#define AV_FUNC_OPTION(func, ver)                                              \
+  if ((ver) & version) {                                                       \
+    if (!(func = (decltype(func))PR_FindSymbol(((ver) & AV_FUNC_AVUTIL_MASK) ? mAVUtilLib : mAVCodecLib, #func))) { \
+      FFMPEG_LOG("Couldn't load function " # func);                            \
+    }                                                                          \
+  } else {                                                                     \
+    func = (decltype(func))nullptr;                                            \
+  }
+
+#define AV_FUNC(func, ver)                                                     \
+  AV_FUNC_OPTION(func, ver)                                                    \
+  if ((ver) & version && !func) {                                              \
+    Unlink();                                                                  \
+    return isFFMpeg ? LinkResult::MissingFFMpegFunction                        \
+                    : LinkResult::MissingLibAVFunction;                        \
+  }
+
+  AV_FUNC(av_lockmgr_register, AV_FUNC_AVCODEC_ALL)
+  AV_FUNC(avcodec_alloc_context3, AV_FUNC_AVCODEC_ALL)
+  AV_FUNC(avcodec_close, AV_FUNC_AVCODEC_ALL)
+  AV_FUNC(avcodec_decode_audio4, AV_FUNC_AVCODEC_ALL)
+  AV_FUNC(avcodec_decode_video2, AV_FUNC_AVCODEC_ALL)
+  AV_FUNC(avcodec_find_decoder, AV_FUNC_AVCODEC_ALL)
+  AV_FUNC(avcodec_flush_buffers, AV_FUNC_AVCODEC_ALL)
+  AV_FUNC(avcodec_open2, AV_FUNC_AVCODEC_ALL)
+  AV_FUNC(avcodec_register_all, AV_FUNC_AVCODEC_ALL)
+  AV_FUNC(av_init_packet, AV_FUNC_AVCODEC_ALL)
+  AV_FUNC(av_parser_init, AV_FUNC_AVCODEC_ALL)
+  AV_FUNC(av_parser_close, AV_FUNC_AVCODEC_ALL)
+  AV_FUNC(av_parser_parse2, AV_FUNC_AVCODEC_ALL)
+  AV_FUNC(avcodec_alloc_frame, (AV_FUNC_53 | AV_FUNC_54))
+  AV_FUNC(avcodec_get_frame_defaults, (AV_FUNC_53 | AV_FUNC_54))
+  AV_FUNC(avcodec_free_frame, AV_FUNC_54)
+  AV_FUNC(av_log_set_level, AV_FUNC_AVUTIL_ALL)
+  AV_FUNC(av_malloc, AV_FUNC_AVUTIL_ALL)
+  AV_FUNC(av_freep, AV_FUNC_AVUTIL_ALL)
+  AV_FUNC(av_frame_alloc, (AV_FUNC_AVUTIL_55 | AV_FUNC_AVUTIL_56 | AV_FUNC_AVUTIL_57))
+  AV_FUNC(av_frame_free, (AV_FUNC_AVUTIL_55 | AV_FUNC_AVUTIL_56 | AV_FUNC_AVUTIL_57))
+  AV_FUNC(av_frame_unref, (AV_FUNC_AVUTIL_55 | AV_FUNC_AVUTIL_56 | AV_FUNC_AVUTIL_57))
+  AV_FUNC_OPTION(av_frame_get_colorspace, AV_FUNC_AVUTIL_ALL)
+#undef AV_FUNC
+#undef AV_FUNC_OPTION
+
+  avcodec_register_all();
+#ifdef DEBUG
+  av_log_set_level(AV_LOG_DEBUG);
+#endif
+
+  return LinkResult::Success;
+}
+
+void
+FFmpegLibWrapper::Unlink()
+{
+  if (av_lockmgr_register) {
+    // Registering a null lockmgr cause the destruction of libav* global mutexes
+    // as the default lockmgr that allocated them will be deregistered.
+    // This prevents ASAN and valgrind to report sizeof(pthread_mutex_t) leaks.
+    av_lockmgr_register(nullptr);
+  }
+  if (mAVUtilLib && mAVUtilLib != mAVCodecLib) {
+    PR_UnloadLibrary(mAVUtilLib);
+  }
+  if (mAVCodecLib) {
+    PR_UnloadLibrary(mAVCodecLib);
+  }
+  PodZero(this);
+}
+
+} // namespace mozilla
\ No newline at end of file