Add Mojo interfaces for GpuJpegDecodeAccelerator and GpuJpegDecodeAcceleratorHost

media/mojo/interfaces/media_types.mojom

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 module media.mojom;
 
 import "gpu/ipc/common/mailbox_holder.mojom";
 import "mojo/common/time.mojom";
 import "ui/gfx/geometry/mojo/geometry.mojom";
 
@@ skipping 154 matching lines @@
   array<uint8> side_data;
 
   // DecryptConfig for a encrypted buffer. NULL if the buffer is not encrypted.
   DecryptConfig? decrypt_config;
 
   // These fields indicate the amount of data to discard after decoding.
   mojo.common.mojom.TimeDelta front_discard;
   mojo.common.mojom.TimeDelta back_discard;
 };
 
+// This defines a mojo transport format for media::BitstreamBuffer.
+struct BitstreamBuffer {

[xhwang, 2017/06/01 16:59:01]

sandersd: Will you also need this for the mojo VideoDecoder work? I wonder
whether we should just put this under media/gpu/mojo as well...

[sandersd (OOO until July 31), 2017/06/01 18:13:33]

No, MVD transports DecoderBuffers.

I am implementing GPU-side support for converting DecoderBuffers to
BitstreamBuffers, for compatibility with VDAs, but it's an ugly hack due to
BitstreamBuffer forcing us to use platform SHM.

I plan to implement an SHM virtual interface and change BitstreamBuffer to use
it, so that I can substitute the platform SHM type for a non-shared buffer.

+  int32 id;
+  handle<shared_buffer> memory_handle;
+  uint32 size;
+  uint64 offset;
+  mojo.common.mojom.TimeDelta timestamp;
+  string key_id;
+  string iv;
+  array<SubsampleEntry> subsamples;
+};
+
 // This defines a mojo transport format for media::AudioBuffer.
 struct AudioBuffer {
   // Format of the audio.
   SampleFormat sample_format;
 
   // How the channels are laid out.
   ChannelLayout channel_layout;
 
   // Number of channels.
   int32 channel_count;
@@ skipping 66 matching lines @@
 };
 
 struct PipelineStatistics {
   uint64 audio_bytes_decoded;
   uint64 video_bytes_decoded;
   uint32 video_frames_decoded;
   uint32 video_frames_dropped;
   int64 audio_memory_usage;
   int64 video_memory_usage;
 };