media/cdm/ppapi/ffmpeg_cdm_video_decoder.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "media/cdm/ppapi/ffmpeg_cdm_video_decoder.h"
   6
   7 #include "base/logging.h"
   8 #include "base/memory/scoped_ptr.h"
   9 #include "media/base/buffers.h"
  10 #include "media/base/limits.h"
  11 #include "media/ffmpeg/ffmpeg_common.h"
  12
  13 // Include FFmpeg header files.
  14 extern "C" {
  15 // Temporarily disable possible loss of data warning.
  16 MSVC_PUSH_DISABLE_WARNING(4244);
  17 #include <libavcodec/avcodec.h>
  18 MSVC_POP_WARNING();
  19 }  // extern "C"
  20
  21 namespace media {
  22
  23 static const int kDecodeThreads = 1;
  24
  25 static cdm::VideoFormat PixelFormatToCdmVideoFormat(PixelFormat pixel_format) {
  26   switch (pixel_format) {
  27     case PIX_FMT_YUV420P:
  28       return cdm::kYv12;
  29     default:
  30       DVLOG(1) << "Unsupported PixelFormat: " << pixel_format;
  31   }
  32   return cdm::kUnknownVideoFormat;
  33 }
  34
  35 static PixelFormat CdmVideoFormatToPixelFormat(cdm::VideoFormat video_format) {
  36   switch (video_format) {
  37     case cdm::kYv12:
  38     case cdm::kI420:
  39       return PIX_FMT_YUV420P;
  40     case cdm::kUnknownVideoFormat:
  41     default:
  42       DVLOG(1) << "Unsupported cdm::VideoFormat: " << video_format;
  43   }
  44   return PIX_FMT_NONE;
  45 }
  46
  47 static AVCodecID CdmVideoCodecToCodecID(
  48     cdm::VideoDecoderConfig::VideoCodec video_codec) {
  49   switch (video_codec) {
  50     case cdm::VideoDecoderConfig::kCodecVp8:
  51       return AV_CODEC_ID_VP8;
  52     case cdm::VideoDecoderConfig::kCodecH264:
  53       return AV_CODEC_ID_H264;
  54     case cdm::VideoDecoderConfig::kUnknownVideoCodec:
  55     default:
  56       NOTREACHED() << "Unsupported cdm::VideoCodec: " << video_codec;
  57       return AV_CODEC_ID_NONE;
  58   }
  59 }
  60
  61 static int CdmVideoCodecProfileToProfileID(
  62     cdm::VideoDecoderConfig::VideoCodecProfile profile) {
  63   switch (profile) {
  64     case cdm::VideoDecoderConfig::kVp8ProfileMain:
  65       return FF_PROFILE_UNKNOWN;  // VP8 does not define an FFmpeg profile.
  66     case cdm::VideoDecoderConfig::kH264ProfileBaseline:
  67       return FF_PROFILE_H264_BASELINE;
  68     case cdm::VideoDecoderConfig::kH264ProfileMain:
  69       return FF_PROFILE_H264_MAIN;
  70     case cdm::VideoDecoderConfig::kH264ProfileExtended:
  71       return FF_PROFILE_H264_EXTENDED;
  72     case cdm::VideoDecoderConfig::kH264ProfileHigh:
  73       return FF_PROFILE_H264_HIGH;
  74     case cdm::VideoDecoderConfig::kH264ProfileHigh10:
  75       return FF_PROFILE_H264_HIGH_10;
  76     case cdm::VideoDecoderConfig::kH264ProfileHigh422:
  77       return FF_PROFILE_H264_HIGH_422;
  78     case cdm::VideoDecoderConfig::kH264ProfileHigh444Predictive:
  79       return FF_PROFILE_H264_HIGH_444_PREDICTIVE;
  80     case cdm::VideoDecoderConfig::kUnknownVideoCodecProfile:
  81     default:
  82       NOTREACHED() << "Unknown cdm::VideoCodecProfile: " << profile;
  83       return FF_PROFILE_UNKNOWN;
  84   }
  85 }
  86
  87 static void CdmVideoDecoderConfigToAVCodecContext(
  88     const cdm::VideoDecoderConfig& config,
  89     AVCodecContext* codec_context) {
  90   codec_context->codec_type = AVMEDIA_TYPE_VIDEO;
  91   codec_context->codec_id = CdmVideoCodecToCodecID(config.codec);
  92   codec_context->profile = CdmVideoCodecProfileToProfileID(config.profile);
  93   codec_context->coded_width = config.coded_size.width;
  94   codec_context->coded_height = config.coded_size.height;
  95   codec_context->pix_fmt = CdmVideoFormatToPixelFormat(config.format);
  96
  97   if (config.extra_data) {
  98     codec_context->extradata_size = config.extra_data_size;
  99     codec_context->extradata = reinterpret_cast<uint8_t*>(
 100         av_malloc(config.extra_data_size + FF_INPUT_BUFFER_PADDING_SIZE));
 101     memcpy(codec_context->extradata, config.extra_data,
 102            config.extra_data_size);
 103     memset(codec_context->extradata + config.extra_data_size, 0,
 104            FF_INPUT_BUFFER_PADDING_SIZE);
 105   } else {
 106     codec_context->extradata = NULL;
 107     codec_context->extradata_size = 0;
 108   }
 109 }
 110
 111 static void CopyPlane(const uint8_t* source,
 112                       int32_t source_stride,
 113                       int32_t target_stride,
 114                       int32_t rows,
 115                       int32_t copy_bytes_per_row,
 116                       uint8_t* target) {
 117   DCHECK(source);
 118   DCHECK(target);
 119   DCHECK_LE(copy_bytes_per_row, source_stride);
 120   DCHECK_LE(copy_bytes_per_row, target_stride);
 121
 122   for (int i = 0; i < rows; ++i) {
 123     const int source_offset = i * source_stride;
 124     const int target_offset = i * target_stride;
 125     memcpy(target + target_offset,
 126            source + source_offset,
 127            copy_bytes_per_row);
 128   }
 129 }
 130
 131 FFmpegCdmVideoDecoder::FFmpegCdmVideoDecoder(cdm::Host* host)
 132     : is_initialized_(false),
 133       host_(host) {
 134 }
 135
 136 FFmpegCdmVideoDecoder::~FFmpegCdmVideoDecoder() {
 137   ReleaseFFmpegResources();
 138 }
 139
 140 bool FFmpegCdmVideoDecoder::Initialize(const cdm::VideoDecoderConfig& config) {
 141   DVLOG(1) << "Initialize()";
 142
 143   if (!IsValidOutputConfig(config.format, config.coded_size)) {
 144     LOG(ERROR) << "Initialize(): invalid video decoder configuration.";
 145     return false;
 146   }
 147
 148   if (is_initialized_) {
 149     LOG(ERROR) << "Initialize(): Already initialized.";
 150     return false;
 151   }
 152
 153   // Initialize AVCodecContext structure.
 154   codec_context_.reset(avcodec_alloc_context3(NULL));
 155   CdmVideoDecoderConfigToAVCodecContext(config, codec_context_.get());
 156
 157   // Enable motion vector search (potentially slow), strong deblocking filter
 158   // for damaged macroblocks, and set our error detection sensitivity.
 159   codec_context_->error_concealment = FF_EC_GUESS_MVS | FF_EC_DEBLOCK;
 160   codec_context_->err_recognition = AV_EF_CAREFUL;
 161   codec_context_->thread_count = kDecodeThreads;
 162   codec_context_->opaque = this;
 163   codec_context_->flags |= CODEC_FLAG_EMU_EDGE;
 164
 165   AVCodec* codec = avcodec_find_decoder(codec_context_->codec_id);
 166   if (!codec) {
 167     LOG(ERROR) << "Initialize(): avcodec_find_decoder failed.";
 168     return false;
 169   }
 170
 171   int status;
 172   if ((status = avcodec_open2(codec_context_.get(), codec, NULL)) < 0) {
 173     LOG(ERROR) << "Initialize(): avcodec_open2 failed: " << status;
 174     return false;
 175   }
 176
 177   av_frame_.reset(avcodec_alloc_frame());
 178   is_initialized_ = true;
 179
 180   return true;
 181 }
 182
 183 void FFmpegCdmVideoDecoder::Deinitialize() {
 184   DVLOG(1) << "Deinitialize()";
 185   ReleaseFFmpegResources();
 186   is_initialized_ = false;
 187 }
 188
 189 void FFmpegCdmVideoDecoder::Reset() {
 190   DVLOG(1) << "Reset()";
 191   avcodec_flush_buffers(codec_context_.get());
 192 }
 193
 194 // static
 195 bool FFmpegCdmVideoDecoder::IsValidOutputConfig(cdm::VideoFormat format,
 196                                                 const cdm::Size& data_size) {
 197   return ((format == cdm::kYv12 || format == cdm::kI420) &&
 198           (data_size.width % 2) == 0 && (data_size.height % 2) == 0 &&
 199           data_size.width > 0 && data_size.height > 0 &&
 200           data_size.width <= limits::kMaxDimension &&
 201           data_size.height <= limits::kMaxDimension &&
 202           data_size.width * data_size.height <= limits::kMaxCanvas);
 203 }
 204
 205 cdm::Status FFmpegCdmVideoDecoder::DecodeFrame(
 206     const uint8_t* compressed_frame,
 207     int32_t compressed_frame_size,
 208     int64_t timestamp,
 209     cdm::VideoFrame* decoded_frame) {
 210   DVLOG(1) << "DecodeFrame()";
 211   DCHECK(decoded_frame);
 212
 213   // Create a packet for input data.
 214   AVPacket packet;
 215   av_init_packet(&packet);
 216
 217   // The FFmpeg API does not allow us to have const read-only pointers.
 218   packet.data = const_cast<uint8_t*>(compressed_frame);
 219   packet.size = compressed_frame_size;
 220
 221   // Let FFmpeg handle presentation timestamp reordering.
 222   codec_context_->reordered_opaque = timestamp;
 223
 224   // Reset frame to default values.
 225   avcodec_get_frame_defaults(av_frame_.get());
 226
 227   // This is for codecs not using get_buffer to initialize
 228   // |av_frame_->reordered_opaque|
 229   av_frame_->reordered_opaque = codec_context_->reordered_opaque;
 230
 231   int frame_decoded = 0;
 232   int result = avcodec_decode_video2(codec_context_.get(),
 233                                      av_frame_.get(),
 234                                      &frame_decoded,
 235                                      &packet);
 236   // Log the problem when we can't decode a video frame and exit early.
 237   if (result < 0) {
 238     LOG(ERROR) << "DecodeFrame(): Error decoding video frame with timestamp: "
 239                << timestamp << " us, packet size: " << packet.size  << " bytes";
 240     return cdm::kDecodeError;
 241   }
 242
 243   // If no frame was produced then signal that more data is required to produce
 244   // more frames.
 245   if (frame_decoded == 0)
 246     return cdm::kNeedMoreData;
 247
 248   // The decoder is in a bad state and not decoding correctly.
 249   // Checking for NULL avoids a crash.
 250   if (!av_frame_->data[cdm::VideoFrame::kYPlane] ||
 251       !av_frame_->data[cdm::VideoFrame::kUPlane] ||
 252       !av_frame_->data[cdm::VideoFrame::kVPlane]) {
 253     LOG(ERROR) << "DecodeFrame(): Video frame has invalid frame data.";
 254     return cdm::kDecodeError;
 255   }
 256
 257   if (!CopyAvFrameTo(decoded_frame)) {
 258     LOG(ERROR) << "DecodeFrame() could not copy video frame to output buffer.";
 259     return cdm::kDecodeError;
 260   }
 261
 262   return cdm::kSuccess;
 263 }
 264
 265 bool FFmpegCdmVideoDecoder::CopyAvFrameTo(cdm::VideoFrame* cdm_video_frame) {
 266   DCHECK(cdm_video_frame);
 267   DCHECK_EQ(av_frame_->format, PIX_FMT_YUV420P);
 268   DCHECK_EQ(av_frame_->width % 2, 0);
 269   DCHECK_EQ(av_frame_->height % 2, 0);
 270
 271   const int y_size = av_frame_->width * av_frame_->height;
 272   const int uv_size = y_size / 2;
 273   const int space_required = y_size + (uv_size * 2);
 274
 275   DCHECK(!cdm_video_frame->FrameBuffer());
 276   cdm_video_frame->SetFrameBuffer(host_->Allocate(space_required));
 277   if (!cdm_video_frame->FrameBuffer()) {
 278     LOG(ERROR) << "CopyAvFrameTo() cdm::Host::Allocate failed.";
 279     return false;
 280   }
 281   cdm_video_frame->FrameBuffer()->SetSize(space_required);
 282
 283   CopyPlane(av_frame_->data[cdm::VideoFrame::kYPlane],
 284             av_frame_->linesize[cdm::VideoFrame::kYPlane],
 285             av_frame_->width,
 286             av_frame_->height,
 287             av_frame_->width,
 288             cdm_video_frame->FrameBuffer()->Data());
 289
 290   const int uv_stride = av_frame_->width / 2;
 291   const int uv_rows = av_frame_->height / 2;
 292   CopyPlane(av_frame_->data[cdm::VideoFrame::kUPlane],
 293             av_frame_->linesize[cdm::VideoFrame::kUPlane],
 294             uv_stride,
 295             uv_rows,
 296             uv_stride,
 297             cdm_video_frame->FrameBuffer()->Data() + y_size);
 298
 299   CopyPlane(av_frame_->data[cdm::VideoFrame::kVPlane],
 300             av_frame_->linesize[cdm::VideoFrame::kVPlane],
 301             uv_stride,
 302             uv_rows,
 303             uv_stride,
 304             cdm_video_frame->FrameBuffer()->Data() + y_size + uv_size);
 305
 306   PixelFormat format = static_cast<PixelFormat>(av_frame_->format);
 307   cdm_video_frame->SetFormat(PixelFormatToCdmVideoFormat(format));
 308
 309   cdm::Size video_frame_size;
 310   video_frame_size.width = av_frame_->width;
 311   video_frame_size.height = av_frame_->height;
 312   cdm_video_frame->SetSize(video_frame_size);
 313
 314   cdm_video_frame->SetPlaneOffset(cdm::VideoFrame::kYPlane, 0);
 315   cdm_video_frame->SetPlaneOffset(cdm::VideoFrame::kUPlane, y_size);
 316   cdm_video_frame->SetPlaneOffset(cdm::VideoFrame::kVPlane,
 317                                     y_size + uv_size);
 318
 319   cdm_video_frame->SetStride(cdm::VideoFrame::kYPlane, av_frame_->width);
 320   cdm_video_frame->SetStride(cdm::VideoFrame::kUPlane, uv_stride);
 321   cdm_video_frame->SetStride(cdm::VideoFrame::kVPlane, uv_stride);
 322
 323   cdm_video_frame->SetTimestamp(av_frame_->reordered_opaque);
 324
 325   return true;
 326 }
 327
 328 void FFmpegCdmVideoDecoder::ReleaseFFmpegResources() {
 329   DVLOG(1) << "ReleaseFFmpegResources()";
 330
 331   codec_context_.reset();
 332   av_frame_.reset();
 333 }
 334
 335 }  // namespace media