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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "media/filters/ffmpeg_video_decoder.h" | 5 #include "media/filters/ffmpeg_video_decoder.h" |
| 6 | 6 |
| 7 #include <algorithm> | 7 #include <algorithm> |
| 8 #include <string> | 8 #include <string> |
| 9 | 9 |
| 10 #include "base/bind.h" | 10 #include "base/bind.h" |
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| 277 // are discarded. | 277 // are discarded. |
| 278 // kFlushCodec: There isn't any more input data. Call avcodec_decode_video2 | 278 // kFlushCodec: There isn't any more input data. Call avcodec_decode_video2 |
| 279 // until no more data is returned to flush out remaining | 279 // until no more data is returned to flush out remaining |
| 280 // frames. The input buffer is ignored at this point. | 280 // frames. The input buffer is ignored at this point. |
| 281 // kDecodeFinished: All calls return empty frames. | 281 // kDecodeFinished: All calls return empty frames. |
| 282 // kError: Unexpected error happened. | 282 // kError: Unexpected error happened. |
| 283 // | 283 // |
| 284 // These are the possible state transitions. | 284 // These are the possible state transitions. |
| 285 // | 285 // |
| 286 // kNormal -> kFlushCodec: | 286 // kNormal -> kFlushCodec: |
| 287 // When buffer->IsEndOfStream() is first true. | 287 // When buffer->end_of_stream() is first true. |
| 288 // kNormal -> kError: | 288 // kNormal -> kError: |
| 289 // A decoding error occurs and decoding needs to stop. | 289 // A decoding error occurs and decoding needs to stop. |
| 290 // kFlushCodec -> kDecodeFinished: | 290 // kFlushCodec -> kDecodeFinished: |
| 291 // When avcodec_decode_video2() returns 0 data. | 291 // When avcodec_decode_video2() returns 0 data. |
| 292 // kFlushCodec -> kError: | 292 // kFlushCodec -> kError: |
| 293 // When avcodec_decode_video2() errors out. | 293 // When avcodec_decode_video2() errors out. |
| 294 // (any state) -> kNormal: | 294 // (any state) -> kNormal: |
| 295 // Any time Reset() is called. | 295 // Any time Reset() is called. |
| 296 | 296 |
| 297 // Transition to kFlushCodec on the first end of stream buffer. | 297 // Transition to kFlushCodec on the first end of stream buffer. |
| 298 if (state_ == kNormal && buffer->IsEndOfStream()) { | 298 if (state_ == kNormal && buffer->end_of_stream()) { |
| 299 state_ = kFlushCodec; | 299 state_ = kFlushCodec; |
| 300 } | 300 } |
| 301 | 301 |
| 302 scoped_refptr<VideoFrame> video_frame; | 302 scoped_refptr<VideoFrame> video_frame; |
| 303 if (!Decode(buffer, &video_frame)) { | 303 if (!Decode(buffer, &video_frame)) { |
| 304 state_ = kError; | 304 state_ = kError; |
| 305 base::ResetAndReturn(&read_cb_).Run(kDecodeError, NULL); | 305 base::ResetAndReturn(&read_cb_).Run(kDecodeError, NULL); |
| 306 return; | 306 return; |
| 307 } | 307 } |
| 308 | 308 |
| 309 // Any successful decode counts! | 309 // Any successful decode counts! |
| 310 if (!buffer->IsEndOfStream() && buffer->GetDataSize() > 0) { | 310 if (!buffer->end_of_stream() && buffer->data_size() > 0) { |
| 311 PipelineStatistics statistics; | 311 PipelineStatistics statistics; |
| 312 statistics.video_bytes_decoded = buffer->GetDataSize(); | 312 statistics.video_bytes_decoded = buffer->data_size(); |
| 313 statistics_cb_.Run(statistics); | 313 statistics_cb_.Run(statistics); |
| 314 } | 314 } |
| 315 | 315 |
| 316 if (!video_frame.get()) { | 316 if (!video_frame.get()) { |
| 317 if (state_ == kFlushCodec) { | 317 if (state_ == kFlushCodec) { |
| 318 DCHECK(buffer->IsEndOfStream()); | 318 DCHECK(buffer->end_of_stream()); |
| 319 state_ = kDecodeFinished; | 319 state_ = kDecodeFinished; |
| 320 base::ResetAndReturn(&read_cb_).Run(kOk, VideoFrame::CreateEmptyFrame()); | 320 base::ResetAndReturn(&read_cb_).Run(kOk, VideoFrame::CreateEmptyFrame()); |
| 321 return; | 321 return; |
| 322 } | 322 } |
| 323 | 323 |
| 324 ReadFromDemuxerStream(); | 324 ReadFromDemuxerStream(); |
| 325 return; | 325 return; |
| 326 } | 326 } |
| 327 | 327 |
| 328 base::ResetAndReturn(&read_cb_).Run(kOk, video_frame); | 328 base::ResetAndReturn(&read_cb_).Run(kOk, video_frame); |
| 329 } | 329 } |
| 330 | 330 |
| 331 bool FFmpegVideoDecoder::Decode( | 331 bool FFmpegVideoDecoder::Decode( |
| 332 const scoped_refptr<DecoderBuffer>& buffer, | 332 const scoped_refptr<DecoderBuffer>& buffer, |
| 333 scoped_refptr<VideoFrame>* video_frame) { | 333 scoped_refptr<VideoFrame>* video_frame) { |
| 334 DCHECK(video_frame); | 334 DCHECK(video_frame); |
| 335 | 335 |
| 336 // Reset frame to default values. | 336 // Reset frame to default values. |
| 337 avcodec_get_frame_defaults(av_frame_); | 337 avcodec_get_frame_defaults(av_frame_); |
| 338 | 338 |
| 339 // Create a packet for input data. | 339 // Create a packet for input data. |
| 340 // Due to FFmpeg API changes we no longer have const read-only pointers. | 340 // Due to FFmpeg API changes we no longer have const read-only pointers. |
| 341 AVPacket packet; | 341 AVPacket packet; |
| 342 av_init_packet(&packet); | 342 av_init_packet(&packet); |
| 343 if (buffer->IsEndOfStream()) { | 343 if (buffer->end_of_stream()) { |
| 344 packet.data = NULL; | 344 packet.data = NULL; |
| 345 packet.size = 0; | 345 packet.size = 0; |
| 346 } else { | 346 } else { |
| 347 packet.data = const_cast<uint8*>(buffer->GetData()); | 347 packet.data = const_cast<uint8*>(buffer->data()); |
| 348 packet.size = buffer->GetDataSize(); | 348 packet.size = buffer->data_size(); |
| 349 | 349 |
| 350 // Let FFmpeg handle presentation timestamp reordering. | 350 // Let FFmpeg handle presentation timestamp reordering. |
| 351 codec_context_->reordered_opaque = buffer->GetTimestamp().InMicroseconds(); | 351 codec_context_->reordered_opaque = buffer->timestamp().InMicroseconds(); |
| 352 | 352 |
| 353 // This is for codecs not using get_buffer to initialize | 353 // This is for codecs not using get_buffer to initialize |
| 354 // |av_frame_->reordered_opaque| | 354 // |av_frame_->reordered_opaque| |
| 355 av_frame_->reordered_opaque = codec_context_->reordered_opaque; | 355 av_frame_->reordered_opaque = codec_context_->reordered_opaque; |
| 356 } | 356 } |
| 357 | 357 |
| 358 int frame_decoded = 0; | 358 int frame_decoded = 0; |
| 359 int result = avcodec_decode_video2(codec_context_, | 359 int result = avcodec_decode_video2(codec_context_, |
| 360 av_frame_, | 360 av_frame_, |
| 361 &frame_decoded, | 361 &frame_decoded, |
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| 445 if (!codec || avcodec_open2(codec_context_, codec, NULL) < 0) { | 445 if (!codec || avcodec_open2(codec_context_, codec, NULL) < 0) { |
| 446 ReleaseFFmpegResources(); | 446 ReleaseFFmpegResources(); |
| 447 return false; | 447 return false; |
| 448 } | 448 } |
| 449 | 449 |
| 450 av_frame_ = avcodec_alloc_frame(); | 450 av_frame_ = avcodec_alloc_frame(); |
| 451 return true; | 451 return true; |
| 452 } | 452 } |
| 453 | 453 |
| 454 } // namespace media | 454 } // namespace media |
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