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| 1 // Copyright (c) 2012 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 "base/logging.h" |
| 6 #include "base/memory/ref_counted.h" |
| 7 #include "media/base/limits.h" |
| 8 #include "media/ffmpeg/ffmpeg_common.h" |
| 9 #include "webkit/media/crypto/decoders/ffmpeg_util.h" |
| 10 #include "webkit/media/crypto/decoders/ffmpeg_video_decoder.h" |
| 11 #include "webkit/media/crypto/ppapi/content_decryption_module.h" |
| 12 |
| 13 namespace webkit_media { |
| 14 |
| 15 using cdm::VideoDecoderConfig; |
| 16 using cdm::VideoFrame; |
| 17 |
| 18 static int GetVideoBufferImpl(AVCodecContext* s, AVFrame* frame) { |
| 19 FFmpegVideoDecoder* vd = static_cast<FFmpegVideoDecoder*>(s->opaque); |
| 20 return vd->GetVideoBuffer(s, frame); |
| 21 } |
| 22 |
| 23 static void ReleaseVideoBufferImpl(AVCodecContext* s, AVFrame* frame) { |
| 24 scoped_refptr<VideoFrame> video_frame; |
| 25 video_frame.swap(reinterpret_cast<VideoFrame**>(&frame->opaque)); |
| 26 |
| 27 // The FFmpeg API expects us to zero the data pointers in |
| 28 // this callback |
| 29 memset(frame->data, 0, sizeof(frame->data)); |
| 30 frame->opaque = NULL; |
| 31 } |
| 32 |
| 33 FFmpegVideoDecoder::FFmpegVideoDecoder() |
| 34 : codec_context_(NULL), |
| 35 av_frame_(NULL) { |
| 36 } |
| 37 |
| 38 FFmpegVideoDecoder::~FFmpegVideoDecoder() { |
| 39 } |
| 40 |
| 41 bool FFmpegVideoDecoder::Initialize(const VideoDecoderConfig& config) { |
| 42 return false; |
| 43 } |
| 44 |
| 45 bool FFmpegVideoDecoder::DecodeFrame(const VideoFrame& compressed_frame, |
| 46 VideoFrame* decompressed_frame) { |
| 47 return false; |
| 48 } |
| 49 |
| 50 int FFmpegVideoDecoder::GetVideoBuffer(AVCodecContext* codec_context, |
| 51 AVFrame* frame) { |
| 52 // Don't use |codec_context_| here! With threaded decoding, |
| 53 // it will contain unsynchronized width/height/pix_fmt values, |
| 54 // whereas |codec_context| contains the current threads's |
| 55 // updated width/height/pix_fmt, which can change for adaptive |
| 56 // content. |
| 57 VideoFrame::Format format = PixelFormatToVideoFormat(codec_context->pix_fmt); |
| 58 if (format == VideoFrame::INVALID) |
| 59 return AVERROR(EINVAL); |
| 60 DCHECK(format == VideoFrame::YV12 || format == VideoFrame::YV16); |
| 61 |
| 62 gfx::Size size(codec_context->width, codec_context->height); |
| 63 int ret; |
| 64 if ((ret = av_image_check_size(size.width(), size.height(), 0, NULL)) < 0) |
| 65 return ret; |
| 66 |
| 67 gfx::Size natural_size; |
| 68 if (codec_context->sample_aspect_ratio.num > 0) { |
| 69 natural_size = GetNaturalSize(size, |
| 70 codec_context->sample_aspect_ratio.num, |
| 71 codec_context->sample_aspect_ratio.den); |
| 72 } else { |
| 73 natural_size = demuxer_stream_->video_decoder_config().natural_size(); |
| 74 } |
| 75 |
| 76 if (!VideoFrame::IsValidConfig(format, size, natural_size)) |
| 77 return AVERROR(EINVAL); |
| 78 |
| 79 scoped_refptr<VideoFrame> video_frame = |
| 80 VideoFrame::CreateFrame(format, size, natural_size, kNoTimestamp()); |
| 81 |
| 82 for (int i = 0; i < 3; i++) { |
| 83 frame->base[i] = video_frame->data(i); |
| 84 frame->data[i] = video_frame->data(i); |
| 85 frame->linesize[i] = video_frame->stride(i); |
| 86 } |
| 87 |
| 88 frame->opaque = NULL; |
| 89 video_frame.swap(reinterpret_cast<VideoFrame**>(&frame->opaque)); |
| 90 frame->type = FF_BUFFER_TYPE_USER; |
| 91 frame->pkt_pts = codec_context->pkt ? codec_context->pkt->pts : |
| 92 AV_NOPTS_VALUE; |
| 93 frame->width = codec_context->width; |
| 94 frame->height = codec_context->height; |
| 95 frame->format = codec_context->pix_fmt; |
| 96 |
| 97 return 0; |
| 98 } |
| 99 |
| 100 // static |
| 101 bool VideoFrame::IsValidConfig(VideoFrame::Format format, |
| 102 const Size& data_size) { |
| 103 return (format != VideoFrame::INVALID && |
| 104 data_size.width() > 0 && data_size.height() > 0 && |
| 105 data_size.width() <= limits::kMaxDimension && |
| 106 data_size.height() <= limits::kMaxDimension && |
| 107 data_size.width() * data_size.height() <= limits::kMaxCanvas && |
| 108 natural_size.width() > 0 && natural_size.height() > 0 && |
| 109 natural_size.width() <= limits::kMaxDimension && |
| 110 natural_size.height() <= limits::kMaxDimension && |
| 111 natural_size.width() * natural_size.height() <= limits::kMaxCanvas); |
| 112 } |
| 113 |
| 114 void FFmpegVideoDecoder::ReleaseFFmpegResources() { |
| 115 if (codec_context_) { |
| 116 av_free(codec_context_->extradata); |
| 117 avcodec_close(codec_context_); |
| 118 av_free(codec_context_); |
| 119 codec_context_ = NULL; |
| 120 } |
| 121 if (av_frame_) { |
| 122 av_free(av_frame_); |
| 123 av_frame_ = NULL; |
| 124 } |
| 125 } |
| 126 |
| 127 } // namespace webkit_media |
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