Fix build with ffmpeg-4.x

Obtained from:

https://git.archlinux.org/svntogit/packages.git/tree/trunk/qtwebengine-ffmpeg4.patch?h=packages/qt5-webengine&id=421103a8798335f7788498e56b5eef3f33ecba26

--- src/3rdparty/chromium/media/base/decoder_buffer.h.orig	2018-01-15 11:39:43 UTC

+++ src/3rdparty/chromium/media/base/decoder_buffer.h

@@ -37,7 +37,7 @@ class MEDIA_EXPORT DecoderBuffer

     : public base::RefCountedThreadSafe<DecoderBuffer> {

  public:

   enum {

-    kPaddingSize = 32,

+    kPaddingSize = 64,

 #if defined(ARCH_CPU_ARM_FAMILY)

     kAlignmentSize = 16

 #else

--- src/3rdparty/chromium/media/ffmpeg/ffmpeg_common.cc.orig	2018-01-15 11:39:43 UTC

+++ src/3rdparty/chromium/media/ffmpeg/ffmpeg_common.cc

@@ -30,10 +30,10 @@ EncryptionScheme GetEncryptionScheme(const AVStream* s

 }  // namespace

-// Why FF_INPUT_BUFFER_PADDING_SIZE? FFmpeg assumes all input buffers are

+// Why AV_INPUT_BUFFER_PADDING_SIZE? FFmpeg assumes all input buffers are

 // padded. Check here to ensure FFmpeg only receives data padded to its

 // specifications.

-static_assert(DecoderBuffer::kPaddingSize >= FF_INPUT_BUFFER_PADDING_SIZE,

+static_assert(DecoderBuffer::kPaddingSize >= AV_INPUT_BUFFER_PADDING_SIZE,

               "DecoderBuffer padding size does not fit ffmpeg requirement");

 // Alignment requirement by FFmpeg for input and output buffers. This need to

@@ -429,11 +429,11 @@ void AudioDecoderConfigToAVCodecContext(const AudioDec

   } else {

     codec_context->extradata_size = config.extra_data().size();

     codec_context->extradata = reinterpret_cast<uint8_t*>(

-        av_malloc(config.extra_data().size() + FF_INPUT_BUFFER_PADDING_SIZE));

+        av_malloc(config.extra_data().size() + AV_INPUT_BUFFER_PADDING_SIZE));

     memcpy(codec_context->extradata, &config.extra_data()[0],

            config.extra_data().size());

     memset(codec_context->extradata + config.extra_data().size(), '\0',

-           FF_INPUT_BUFFER_PADDING_SIZE);

+           AV_INPUT_BUFFER_PADDING_SIZE);

   }

 }

@@ -561,11 +561,11 @@ void VideoDecoderConfigToAVCodecContext(

   } else {

     codec_context->extradata_size = config.extra_data().size();

     codec_context->extradata = reinterpret_cast<uint8_t*>(

-        av_malloc(config.extra_data().size() + FF_INPUT_BUFFER_PADDING_SIZE));

+        av_malloc(config.extra_data().size() + AV_INPUT_BUFFER_PADDING_SIZE));

     memcpy(codec_context->extradata, &config.extra_data()[0],

            config.extra_data().size());

     memset(codec_context->extradata + config.extra_data().size(), '\0',

-           FF_INPUT_BUFFER_PADDING_SIZE);

+           AV_INPUT_BUFFER_PADDING_SIZE);

   }

 }

--- src/3rdparty/chromium/media/filters/ffmpeg_audio_decoder.cc.orig	2018-01-15 11:39:43 UTC

+++ src/3rdparty/chromium/media/filters/ffmpeg_audio_decoder.cc

@@ -53,7 +53,7 @@ static void ReleaseAudioBufferImpl(void* opaque, uint8

 // AVCodecContext.opaque to get the object reference in order to call

 // GetAudioBuffer() to do the actual allocation.

 static int GetAudioBuffer(struct AVCodecContext* s, AVFrame* frame, int flags) {

-  DCHECK(s->codec->capabilities & CODEC_CAP_DR1);

+  DCHECK(s->codec->capabilities & AV_CODEC_CAP_DR1);

   DCHECK_EQ(s->codec_type, AVMEDIA_TYPE_AUDIO);

   // Since this routine is called by FFmpeg when a buffer is required for audio

--- src/3rdparty/chromium/media/filters/ffmpeg_video_decoder.cc.orig	2018-01-15 11:39:43 UTC

+++ src/3rdparty/chromium/media/filters/ffmpeg_video_decoder.cc

@@ -415,12 +415,11 @@ bool FFmpegVideoDecoder::ConfigureDecoder(bool low_del

   codec_context_->thread_type =

       FF_THREAD_SLICE | (low_delay ? 0 : FF_THREAD_FRAME);

   codec_context_->opaque = this;

-  codec_context_->flags |= CODEC_FLAG_EMU_EDGE;

   codec_context_->get_buffer2 = GetVideoBufferImpl;

   codec_context_->refcounted_frames = 1;

   if (decode_nalus_)

-    codec_context_->flags2 |= CODEC_FLAG2_CHUNKS;

+    codec_context_->flags2 |= AV_CODEC_FLAG2_CHUNKS;

   AVCodec* codec = avcodec_find_decoder(codec_context_->codec_id);

   if (!codec || avcodec_open2(codec_context_.get(), codec, NULL) < 0) {