Implemented HEVC video demuxing and parsing

media/filters/ffmpeg_demuxer.cc

 // Copyright (c) 2012 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.
 
 #include "media/filters/ffmpeg_demuxer.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/base64.h"
@@ skipping 17 matching lines @@
 #include "media/base/media_log.h"
 #include "media/base/video_decoder_config.h"
 #include "media/ffmpeg/ffmpeg_common.h"
 #include "media/filters/ffmpeg_aac_bitstream_converter.h"
 #include "media/filters/ffmpeg_bitstream_converter.h"
 #include "media/filters/ffmpeg_glue.h"
 #include "media/filters/ffmpeg_h264_to_annex_b_bitstream_converter.h"
 #include "media/filters/webvtt_util.h"
 #include "media/formats/webm/webm_crypto_helpers.h"
 
+#if defined(USE_PROPRIETARY_CODECS) && defined(ENABLE_HEVC_DEMUXING)
+#include "media/filters/ffmpeg_h265_to_annex_b_bitstream_converter.h"
+#endif
+
 namespace media {
 
 static base::Time ExtractTimelineOffset(AVFormatContext* format_context) {
   if (strstr(format_context->iformat->name, "webm") ||
       strstr(format_context->iformat->name, "matroska")) {
     const AVDictionaryEntry* entry =
         av_dict_get(format_context->metadata, "creation_time", NULL, 0);
 
     base::Time timeline_offset;
     if (entry != NULL && entry->value != NULL &&
@@ skipping 405 matching lines @@
   if (bitstream_converter_)
     InitBitstreamConverter();
 #endif  // defined(USE_PROPRIETARY_CODECS)
 }
 
 void FFmpegDemuxerStream::InitBitstreamConverter() {
 #if defined(USE_PROPRIETARY_CODECS)
   if (stream_->codec->codec_id == AV_CODEC_ID_H264) {
     bitstream_converter_.reset(
         new FFmpegH264ToAnnexBBitstreamConverter(stream_->codec));
+#if defined(ENABLE_HEVC_DEMUXING)
+  } else if (stream_->codec->codec_id == AV_CODEC_ID_HEVC) {
+    bitstream_converter_.reset(
+        new FFmpegH265ToAnnexBBitstreamConverter(stream_->codec));
+#endif
   } else if (stream_->codec->codec_id == AV_CODEC_ID_AAC) {
     bitstream_converter_.reset(
         new FFmpegAACBitstreamConverter(stream_->codec));
   }
 #endif  // defined(USE_PROPRIETARY_CODECS)
 }
 
 bool FFmpegDemuxerStream::SupportsConfigChanges() { return false; }
 
 AudioDecoderConfig FFmpegDemuxerStream::audio_decoder_config() {
@@ skipping 408 matching lines @@
       // Ensure the codec is supported. IsValidConfig() also checks that the
       // channel layout and sample format are valid.
       AVStreamToAudioDecoderConfig(stream, &audio_config, false);
       if (!audio_config.IsValidConfig())
         continue;
       audio_stream = stream;
     } else if (codec_type == AVMEDIA_TYPE_VIDEO) {
       if (video_stream)
         continue;
 
+
+#if defined(ENABLE_HEVC_DEMUXING)
+      if (stream->codec->codec_id == AV_CODEC_ID_HEVC) {
+        // If ffmpeg is built without HEVC parser/decoder support, it will be
+        // able to demux HEVC based solely on container-provided information,
+        // but unable to get some of the parameters without parsing the stream
+        // (e.g. coded size needs to be read from SPS, pixel format is typically
+        // deduced from decoder config in hvcC box). These are not really needed
+        // when using external decoder (e.g. hardware decoder), so override them
+        // here, to make sure this translates into a valid VideoDecoderConfig.
+        if (stream->codec->coded_width == 0 &&
+            stream->codec->coded_height == 0) {
+          DCHECK(stream->codec->width > 0);
+          DCHECK(stream->codec->height > 0);
+          stream->codec->coded_width = stream->codec->width;
+          stream->codec->coded_height = stream->codec->height;
+        }
+        if (stream->codec->pix_fmt == AV_PIX_FMT_NONE) {
+          stream->codec->pix_fmt = PIX_FMT_YUV420P;
+        }
+      }
+#endif
       // Log the codec detected, whether it is supported or not.
       UMA_HISTOGRAM_SPARSE_SLOWLY("Media.DetectedVideoCodec",
                                   codec_context->codec_id);
       // Ensure the codec is supported. IsValidConfig() also checks that the
       // frame size and visible size are valid.
       AVStreamToVideoDecoderConfig(stream, &video_config, false);
 
       if (!video_config.IsValidConfig())
         continue;
       video_stream = stream;
@@ skipping 392 matching lines @@
 
 void FFmpegDemuxer::SetLiveness(DemuxerStream::Liveness liveness) {
   DCHECK(task_runner_->BelongsToCurrentThread());
   for (const auto& stream : streams_) {  // |stream| is a ref to a pointer.
     if (stream)
       stream->SetLiveness(liveness);
   }
 }
 
 }  // namespace media