Index: webkit/media/crypto/ppapi/ffmpeg_cdm_video_decoder.cc |
diff --git a/webkit/media/crypto/ppapi/ffmpeg_cdm_video_decoder.cc b/webkit/media/crypto/ppapi/ffmpeg_cdm_video_decoder.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..fc50632141810a2b347bec63d1c38e1684c51640 |
--- /dev/null |
+++ b/webkit/media/crypto/ppapi/ffmpeg_cdm_video_decoder.cc |
@@ -0,0 +1,331 @@ |
+// 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 "webkit/media/crypto/ppapi/ffmpeg_cdm_video_decoder.h" |
+ |
+#include "base/logging.h" |
+#include "base/memory/scoped_ptr.h" |
+#include "media/base/buffers.h" |
+#include "media/base/limits.h" |
+#include "media/ffmpeg/ffmpeg_common.h" |
+#include "webkit/media/crypto/ppapi/content_decryption_module.h" |
+ |
+// Include FFmpeg header files. |
+extern "C" { |
+// Temporarily disable possible loss of data warning. |
+MSVC_PUSH_DISABLE_WARNING(4244); |
+#include <libavcodec/avcodec.h> |
+MSVC_POP_WARNING(); |
+} // extern "C" |
+ |
+namespace webkit_media { |
+ |
+static const int kDecodeThreads = 1; |
+ |
+static cdm::VideoFormat PixelFormatToCdmVideoFormat(PixelFormat pixel_format) { |
+ switch (pixel_format) { |
+ case PIX_FMT_YUV420P: |
+ return cdm::kYv12; |
+ default: |
+ DVLOG(1) << "Unsupported PixelFormat: " << pixel_format; |
+ } |
+ return cdm::kUnknownVideoFormat; |
+} |
+ |
+static PixelFormat CdmVideoFormatToPixelFormat(cdm::VideoFormat video_format) { |
+ switch (video_format) { |
+ case cdm::kYv12: |
+ case cdm::kI420: |
+ return PIX_FMT_YUV420P; |
+ case cdm::kUnknownVideoFormat: |
+ default: |
+ DVLOG(1) << "Unsupported cdm::VideoFormat: " << video_format; |
+ } |
+ return PIX_FMT_NONE; |
+} |
+ |
+static CodecID CdmVideoCodecToCodecID( |
+ cdm::VideoDecoderConfig::VideoCodec video_codec) { |
+ switch (video_codec) { |
+ case cdm::VideoDecoderConfig::kCodecVP8: |
+ return CODEC_ID_VP8; |
+ case cdm::kUnknownVideoFormat: |
+ default: |
+ DVLOG(1) << "Unsupported cdm::VideoCodec: " << video_codec; |
+ } |
+ NOTREACHED() << "Unsupported video_codec: " << video_codec; |
+ return CODEC_ID_NONE; |
+} |
+ |
+static void CdmVideoDecoderConfigToAVCodecContext( |
+ const cdm::VideoDecoderConfig& config, |
+ AVCodecContext* codec_context) { |
+ codec_context->codec_type = AVMEDIA_TYPE_VIDEO; |
+ codec_context->codec_id = CdmVideoCodecToCodecID(config.codec); |
+ codec_context->profile = FF_PROFILE_UNKNOWN; |
+ codec_context->coded_width = config.coded_size.width; |
+ codec_context->coded_height = config.coded_size.height; |
+ codec_context->pix_fmt = CdmVideoFormatToPixelFormat(config.format); |
+ |
+ if (config.extra_data) { |
+ 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)); |
+ memcpy(codec_context->extradata, config.extra_data, |
+ config.extra_data_size); |
+ memset(codec_context->extradata + config.extra_data_size, 0, |
+ FF_INPUT_BUFFER_PADDING_SIZE); |
+ } else { |
+ codec_context->extradata = NULL; |
+ codec_context->extradata_size = 0; |
+ } |
+ |
+} |
+ |
+static void CopyPlane(const uint8_t* source, |
+ int32_t source_stride, |
+ int32_t target_stride, |
+ int32_t rows, |
+ int32_t copy_bytes_per_row, |
+ uint8_t* target) { |
+ DCHECK(source); |
+ DCHECK(target); |
+ DCHECK_LE(copy_bytes_per_row, source_stride); |
+ DCHECK_LE(copy_bytes_per_row, target_stride); |
+ |
+ for (int i = 0; i < rows; ++i) { |
+ const int source_offset = i * source_stride; |
+ const int target_offset = i * target_stride; |
+ memcpy(target + target_offset, |
+ source + source_offset, |
+ copy_bytes_per_row); |
+ } |
+} |
+ |
+FFmpegCdmVideoDecoder::FFmpegCdmVideoDecoder(cdm::Allocator* allocator) |
+ : codec_context_(NULL), |
+ av_frame_(NULL), |
+ is_initialized_(false), |
+ allocator_(allocator) { |
+} |
+ |
+FFmpegCdmVideoDecoder::~FFmpegCdmVideoDecoder() { |
+ ReleaseFFmpegResources(); |
+} |
+ |
+bool FFmpegCdmVideoDecoder::Initialize(const cdm::VideoDecoderConfig& config) { |
+ DVLOG(1) << "Initialize()"; |
+ |
+ if (!IsValidOutputConfig(config.format, config.coded_size)) { |
+ LOG(ERROR) << "Initialize(): invalid video decoder configuration."; |
+ return false; |
+ } |
+ |
+ if (is_initialized_) { |
+ LOG(ERROR) << "Initialize(): Already initialized."; |
+ return false; |
+ } |
+ |
+ av_register_all(); |
+ |
+ // Release existing resources if necessary. |
+ ReleaseFFmpegResources(); |
+ |
+ // Initialize AVCodecContext structure. |
+ codec_context_ = avcodec_alloc_context3(NULL); |
+ CdmVideoDecoderConfigToAVCodecContext(config, codec_context_); |
+ |
+ // Enable motion vector search (potentially slow), strong deblocking filter |
+ // for damaged macroblocks, and set our error detection sensitivity. |
+ codec_context_->error_concealment = FF_EC_GUESS_MVS | FF_EC_DEBLOCK; |
+ codec_context_->err_recognition = AV_EF_CAREFUL; |
+ codec_context_->thread_count = kDecodeThreads; |
+ codec_context_->opaque = this; |
+ codec_context_->flags |= CODEC_FLAG_EMU_EDGE; |
xhwang
2012/10/18 16:30:25
So without setting "get_buffer" here, are we using
Tom Finegan
2012/10/18 19:29:41
Yes.
|
+ DCHECK_EQ(CODEC_ID_VP8, codec_context_->codec_id); |
+ |
+ AVCodec* codec = avcodec_find_decoder(codec_context_->codec_id); |
+ if (!codec) { |
+ LOG(ERROR) << "Initialize(): avcodec_find_decoder failed."; |
+ return false; |
+ } |
+ |
+ int status; |
+ if ((status = avcodec_open2(codec_context_, codec, NULL)) < 0) { |
+ LOG(ERROR) << "Initialize(): avcodec_open2 failed: " << status; |
+ return false; |
+ } |
+ |
+ av_frame_ = avcodec_alloc_frame(); |
+ is_initialized_ = true; |
+ |
+ return true; |
+} |
+ |
+void FFmpegCdmVideoDecoder::Deinitialize() { |
+ DVLOG(1) << "Deinitialize()"; |
+ ReleaseFFmpegResources(); |
+ is_initialized_ = false; |
+} |
+ |
+void FFmpegCdmVideoDecoder::Reset() { |
+ DVLOG(1) << "Reset()"; |
+ avcodec_flush_buffers(codec_context_); |
+} |
+ |
+// static |
+bool FFmpegCdmVideoDecoder::IsValidOutputConfig(cdm::VideoFormat format, |
+ const cdm::Size& data_size) { |
+ return ((format == cdm::kYv12 || format == cdm::kI420) && |
+ data_size.width > 0 && data_size.height > 0 && |
+ data_size.width <= media::limits::kMaxDimension && |
+ data_size.height <= media::limits::kMaxDimension && |
+ data_size.width * data_size.height <= media::limits::kMaxCanvas); |
+} |
+ |
+cdm::Status FFmpegCdmVideoDecoder::DecodeFrame( |
+ const uint8_t* compressed_frame, |
+ int32_t compressed_frame_size, |
+ int64_t timestamp, |
+ cdm::VideoFrame* decoded_frame) { |
+ DVLOG(1) << "DecodeFrame()"; |
+ DCHECK(decoded_frame); |
+ |
+ // Create a packet for input data. |
+ AVPacket packet; |
+ av_init_packet(&packet); |
+ |
+ // The FFmpeg API changes does not allow us to have const read-only pointers. |
+ packet.data = const_cast<uint8_t*>(compressed_frame); |
+ packet.size = compressed_frame_size; |
+ |
+ // Let FFmpeg handle presentation timestamp reordering. |
+ codec_context_->reordered_opaque = timestamp; |
+ |
+ // Reset frame to default values. |
+ avcodec_get_frame_defaults(av_frame_); |
+ |
+ // This is for codecs not using get_buffer to initialize |
+ // |av_frame_->reordered_opaque| |
+ av_frame_->reordered_opaque = codec_context_->reordered_opaque; |
+ |
+ int frame_decoded = 0; |
+ int result = avcodec_decode_video2(codec_context_, |
+ av_frame_, |
+ &frame_decoded, |
+ &packet); |
+ // Log the problem when we can't decode a video frame and exit early. |
+ if (result < 0) { |
+ LOG(ERROR) << "DecodeFrame(): Error decoding video frame with timestamp: " |
+ << timestamp << " us, packet size: " << packet.size << " bytes"; |
+ return cdm::kDecodeError; |
+ } |
+ |
+ // If no frame was produced then signal that more data is required to |
+ // produce more frames. This can happen under two circumstances: |
+ // 1) Decoder was recently initialized/flushed |
+ // 2) End of stream was reached and all internal frames have been output |
+ if (frame_decoded == 0) { |
+ // There was an input frame, but FFmpeg did not produce an output frame. |
+ // More input data is needed to produce output. |
+ if (compressed_frame && compressed_frame_size > 0) |
+ return cdm::kNeedMoreData; |
+ |
+ // No output frame was produced by FFmpeg, and there was no input data. |
+ // The decoder has been flushed. |
+ else |
+ return cdm::kSuccess; |
+ } |
+ |
+ // The decoder is in a bad state and not decoding correctly. |
+ // Checking for NULL avoids a crash. |
+ if (!av_frame_->data[cdm::VideoFrame::kYPlane] || |
+ !av_frame_->data[cdm::VideoFrame::kUPlane] || |
+ !av_frame_->data[cdm::VideoFrame::kVPlane]) { |
+ LOG(ERROR) << "DecodeFrame(): Video frame has invalid frame data."; |
+ return cdm::kDecodeError; |
+ } |
+ |
+ if (!CopyAvFrameTo(decoded_frame)) { |
+ LOG(ERROR) << "DecodeFrame() could not copy video frame to output buffer."; |
+ return cdm::kDecodeError; |
+ } |
+ |
+ return cdm::kSuccess; |
+} |
+ |
+bool FFmpegCdmVideoDecoder::CopyAvFrameTo(cdm::VideoFrame* cdm_video_frame) { |
+ DCHECK(cdm_video_frame); |
+ DCHECK_EQ(av_frame_->format, PIX_FMT_YUV420P); |
+ |
+ const int y_size = av_frame_->width * av_frame_->height; |
+ const int uv_size = y_size / 2; |
+ const int space_required = y_size + (uv_size * 2); |
+ |
+ DCHECK(!cdm_video_frame->frame_buffer()); |
+ cdm_video_frame->set_frame_buffer(allocator_->Allocate(space_required)); |
+ if (!cdm_video_frame->frame_buffer()) { |
+ LOG(ERROR) << "CopyAvFrameTo() cdm::Allocator::Allocate failed."; |
+ return false; |
+ } |
+ |
+ CopyPlane(av_frame_->base[cdm::VideoFrame::kYPlane], |
+ av_frame_->linesize[cdm::VideoFrame::kYPlane], |
+ av_frame_->width, |
+ av_frame_->height, |
+ av_frame_->width, |
+ cdm_video_frame->frame_buffer()->data()); |
+ |
+ const int uv_stride = av_frame_->width / 2; |
xhwang
2012/10/18 16:30:25
Do we ensure av_frame_->width is even?
Tom Finegan
2012/10/18 19:29:41
I do now. IsValidOutputConfig() will fail, and the
|
+ const int uv_rows = av_frame_->height / 2; |
+ CopyPlane(av_frame_->base[cdm::VideoFrame::kUPlane], |
+ av_frame_->linesize[cdm::VideoFrame::kUPlane], |
+ uv_stride, |
+ uv_rows, |
+ uv_stride, |
+ cdm_video_frame->frame_buffer()->data() + y_size); |
+ |
+ CopyPlane(av_frame_->base[cdm::VideoFrame::kVPlane], |
+ av_frame_->linesize[cdm::VideoFrame::kVPlane], |
+ uv_stride, |
+ uv_rows, |
+ uv_stride, |
+ cdm_video_frame->frame_buffer()->data() + y_size + uv_size); |
+ |
+ PixelFormat format = static_cast<PixelFormat>(av_frame_->format); |
+ cdm_video_frame->set_format(PixelFormatToCdmVideoFormat(format)); |
+ |
+ cdm::Size video_frame_size; |
+ video_frame_size.width = av_frame_->width; |
+ video_frame_size.height = av_frame_->height; |
+ cdm_video_frame->set_size(video_frame_size); |
+ |
+ cdm_video_frame->set_plane_offset(cdm::VideoFrame::kYPlane, 0); |
+ cdm_video_frame->set_plane_offset(cdm::VideoFrame::kUPlane, y_size); |
+ cdm_video_frame->set_plane_offset(cdm::VideoFrame::kVPlane, |
+ y_size + uv_size); |
+ |
+ cdm_video_frame->set_stride(cdm::VideoFrame::kYPlane, av_frame_->width); |
+ cdm_video_frame->set_stride(cdm::VideoFrame::kUPlane, uv_stride); |
+ cdm_video_frame->set_stride(cdm::VideoFrame::kVPlane, uv_stride); |
+ |
+ return true; |
+} |
+ |
+void FFmpegCdmVideoDecoder::ReleaseFFmpegResources() { |
+ DVLOG(1) << "ReleaseFFmpegResources()"; |
+ |
+ if (codec_context_) { |
+ av_free(codec_context_->extradata); |
+ avcodec_close(codec_context_); |
+ av_free(codec_context_); |
+ codec_context_ = NULL; |
+ } |
+ if (av_frame_) { |
+ av_free(av_frame_); |
+ av_frame_ = NULL; |
+ } |
+} |
+ |
+} // namespace webkit_media |