Index: webkit/media/crypto/ppapi/ffmpeg_video_decoder.cc |
diff --git a/webkit/media/crypto/ppapi/ffmpeg_video_decoder.cc b/webkit/media/crypto/ppapi/ffmpeg_video_decoder.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..c2dec918f06e9bee36659c6f3e77eb5f838b4ff8 |
--- /dev/null |
+++ b/webkit/media/crypto/ppapi/ffmpeg_video_decoder.cc |
@@ -0,0 +1,315 @@ |
+// 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 "base/logging.h" |
+#include "base/memory/ref_counted.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 "webkit/media/crypto/ppapi/ffmpeg_video_decoder.h" |
+#include "webkit/media/crypto/ppapi/video_frame.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 { |
+ |
+cdm::VideoFormat PixelFormatToVideoFormat(PixelFormat pixel_format) { |
+ switch (pixel_format) { |
+ case PIX_FMT_YUV420P: |
+ return cdm::kYv12; |
+ default: |
+ DVLOG(1) << "Unsupported PixelFormat: " << pixel_format; |
+ } |
+ return cdm::kUnknownVideoFormat; |
+} |
+ |
+PixelFormat VideoFormatToPixelFormat(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; |
+} |
+ |
+CodecID VideoCodecToCodecID(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; |
+} |
+ |
+void VideoDecoderConfigToAVCodecContext( |
+ const cdm::VideoDecoderConfig& config, |
+ AVCodecContext* codec_context) { |
+ codec_context->codec_type = AVMEDIA_TYPE_VIDEO; |
+ codec_context->codec_id = VideoCodecToCodecID(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 = VideoFormatToPixelFormat(config.format); |
+} |
+ |
+void VideoFrameToVideoDecoderConfig(const cdm::VideoFrame& frame, |
+ cdm::VideoDecoderConfig* config) { |
+ DCHECK(config); |
ddorwin
2012/10/13 03:54:42
NOTIMPLEMENTED()?
Tom Finegan
2012/10/13 23:47:26
Forgot to remove this... something I thought I nee
|
+} |
+ |
+cdm::VideoFrame::VideoPlane VideoPlane(int32_t plane_index) { |
+ DCHECK(plane_index >= cdm::VideoFrame::kYPlane && |
+ plane_index < cdm::VideoFrame::kMaxPlanes); |
+ return static_cast<cdm::VideoFrame::VideoPlane>(plane_index); |
+} |
+ |
+uint8_t* PlanePointer(cdm::VideoFrame* frame, int plane_index) { |
+ DCHECK(frame); |
+ return frame->frame_buffer()->data() + |
+ frame->plane_offset(VideoPlane(plane_index)); |
+ |
+} |
+ |
+} // anonymous name space |
ddorwin
2012/10/13 03:54:42
// namespace
Tom Finegan
2012/10/13 23:47:26
Done.
|
+ |
+namespace webkit_media { |
+ |
+bool IsValidConfig(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); |
+} |
+ |
+static int GetVideoBufferImpl(AVCodecContext* s, AVFrame* frame) { |
+ FFmpegVideoDecoder* vd = static_cast<FFmpegVideoDecoder*>(s->opaque); |
+ return vd->GetVideoBuffer(s, frame); |
+} |
+ |
+static void ReleaseVideoBufferImpl(AVCodecContext* s, AVFrame* frame) { |
+ // The FFmpeg API expects us to zero the data pointers in |
+ // this callback |
+ memset(frame->data, 0, sizeof(frame->data)); |
+ frame->opaque = NULL; |
+} |
+ |
+FFmpegVideoDecoder::FFmpegVideoDecoder(cdm::Allocator* allocator) |
+ : codec_context_(NULL), |
+ av_frame_(NULL), |
+ allocator_(allocator) { |
+} |
+ |
+FFmpegVideoDecoder::~FFmpegVideoDecoder() { |
+ ReleaseFFmpegResources(); |
+} |
+ |
+bool FFmpegVideoDecoder::Initialize(const cdm::VideoDecoderConfig& config) { |
+ if (!IsValidConfig(config.format, config.coded_size)) { |
+ DLOG(ERROR) << "Invalid VideoDecoderConfig."; |
+ return false; |
+ } |
+ |
+ av_register_all(); |
+ |
+ // Release existing resources if necessary. |
+ ReleaseFFmpegResources(); |
+ |
+ // Initialize AVCodecContext structure. |
+ codec_context_ = avcodec_alloc_context3(NULL); |
+ VideoDecoderConfigToAVCodecContext(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; |
+ codec_context_->get_buffer = GetVideoBufferImpl; |
+ codec_context_->release_buffer = ReleaseVideoBufferImpl; |
+ DCHECK_EQ(CODEC_ID_VP8, codec_context_->codec_id); |
+ |
+ AVCodec* codec = avcodec_find_decoder(codec_context_->codec_id); |
+ if (!codec) { |
+ LOG(ERROR) << "avcodec_find_decoder failed."; |
+ return false; |
+ } |
+ |
+ int status; |
+ if ((status = avcodec_open2(codec_context_, codec, NULL)) < 0) { |
+ LOG(ERROR) << "avcodec_open2 failed: " << status; |
+ return false; |
+ } |
+ |
+ av_frame_ = avcodec_alloc_frame(); |
+ config_ = config; |
+ // TODO(tomfinegan): Do we need to copy the extra data? Zeroing the members |
+ // because we don't own this memory. |
+ config_.extra_data = NULL; |
+ config_.extra_data_size = 0; |
+ return true; |
+} |
+ |
+void FFmpegVideoDecoder::Deinitialize() { |
+ ReleaseFFmpegResources(); |
+} |
+ |
+void FFmpegVideoDecoder::Reset() { |
+ avcodec_flush_buffers(codec_context_); |
+} |
+ |
+void CopyCdmVideoFrame(cdm::VideoFrame* source, cdm::VideoFrame* target) { |
ddorwin
2012/10/13 03:54:42
More of a Move. Maybe we should clear source as we
Tom Finegan
2012/10/13 23:47:26
Renamed to MoveCdmVideoFrame(), changed arg 1 to w
|
+ DCHECK(source); |
+ DCHECK(target); |
+ target->set_format(source->format()); |
+ target->set_frame_buffer(source->frame_buffer()); |
+ |
+ typedef cdm::VideoFrame::VideoPlane VideoPlane; |
+ const int kMaxPlanes = cdm::VideoFrame::kMaxPlanes; |
+ for (int i = 0; static_cast<VideoPlane>(i) < kMaxPlanes; ++i) { |
+ cdm::VideoFrame::VideoPlane plane = static_cast<VideoPlane>(i); |
+ target->set_plane_offset(plane, source->plane_offset(plane)); |
+ target->set_stride(plane, source->stride(plane)); |
+ } |
+ |
+ target->set_timestamp(source->timestamp()); |
+} |
+ |
+bool FFmpegVideoDecoder::DecodeFrame(const uint8_t* compressed_frame, |
+ int32_t frame_length, |
+ int64_t timestamp, |
+ cdm::VideoFrame* decoded_frame) { |
+ DCHECK(decoded_frame); |
+ |
+ // Create a packet for input data. |
+ // Due to FFmpeg API changes we no longer have const read-only pointers. |
+ AVPacket packet; |
+ av_init_packet(&packet); |
+ packet.data = const_cast<uint8_t*>(compressed_frame); |
+ packet.size = frame_length; |
+ |
+ // 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) << "Error decoding a video frame with timestamp: " << timestamp |
+ << " us, packet size: " << frame_length << " bytes"; |
+ return false; |
+ } |
+ |
+ // 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) |
+ return true; |
+ |
+ // 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) << "Video frame was produced yet has invalid frame data."; |
+ return false; |
+ } |
+ |
+ if (!av_frame_->opaque) { |
+ LOG(ERROR) << "VideoFrame object associated with frame data not set."; |
+ return false; |
+ } |
+ |
+ scoped_ptr<VideoFrame> video_frame( |
+ static_cast<VideoFrame*>(av_frame_->opaque)); |
+ DCHECK(video_frame->frame()); |
+ CopyCdmVideoFrame(video_frame->frame(), decoded_frame); |
+ video_frame->ReleaseCdmVideoFrame(); |
+ return true; |
+} |
+ |
+int FFmpegVideoDecoder::GetVideoBuffer(AVCodecContext* codec_context, |
+ AVFrame* av_frame) { |
+ // Don't use |codec_context_| here! With threaded decoding, |
+ // it will contain unsynchronized width/height/pix_fmt values, |
+ // whereas |codec_context| contains the current threads's |
+ // updated width/height/pix_fmt, which can change for adaptive |
+ // content. |
+ cdm::VideoFormat format = |
+ PixelFormatToVideoFormat(codec_context->pix_fmt); |
+ if (format == cdm::kUnknownVideoFormat) |
+ return AVERROR(EINVAL); |
+ DCHECK(format == cdm::kYv12 || format == cdm::kI420); |
+ |
+ cdm::Size size(codec_context->width, codec_context->height); |
+ int ret; |
+ if ((ret = av_image_check_size(size.width, size.height, 0, NULL)) < 0) |
+ return ret; |
+ |
+ if (!IsValidConfig(format, size)) |
+ return AVERROR(EINVAL); |
+ |
+ VideoFrame* video_frame = VideoFrame::Create(allocator_, format, size, 0); |
+ if (!video_frame) { |
+ LOG(ERROR) << "FFmpegVideoDecoder::GetVideoBuffer VideoFrame Create failed"; |
+ return AVERROR(ENOMEM); |
+ } |
+ |
+ for (int i = 0; i < cdm::VideoFrame::kMaxPlanes; ++i) { |
+ av_frame->base[i] = PlanePointer(video_frame->frame(), i); |
+ av_frame->data[i] = PlanePointer(video_frame->frame(), i); |
+ av_frame->linesize[i] = video_frame->frame()->stride(VideoPlane(i)); |
+ } |
+ |
+ av_frame->opaque = reinterpret_cast<void*>(video_frame); |
+ av_frame->type = FF_BUFFER_TYPE_USER; |
+ av_frame->pkt_pts = codec_context->pkt ? codec_context->pkt->pts : |
+ AV_NOPTS_VALUE; |
+ av_frame->width = codec_context->width; |
+ av_frame->height = codec_context->height; |
+ av_frame->format = codec_context->pix_fmt; |
+ |
+ return 0; |
+} |
+ |
+void FFmpegVideoDecoder::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 |