plugins/ffmpeg/AVCodecDecoder.cpp

266 AVCodecDecoder::SeekedTo(int64 frame, bigtime_t time)
283 	fFrame = frame;
398 		TRACE("[a] decoding first audio frame chunk failed\n");
457 		"output frame size: %d, count: %" B_PRId32 ", rate: %.2f\n",
515 		TRACE("[v] decoding first video frame failed\n");
555 	// first frame which we just decoded (that updates fCodecContext inside ffmpeg).
558 	// presentation timestamps for each individual frame.
560 	// TODO The field_rate is twice the frame rate for interlaced streams, so we need to determine
561 	// if we are decoding an interlaced stream, and wether ffmpeg delivers every half-frame or not
602 		properties of the decoded audio frame being the first in the outBuffer.
632 /*! \brief Fills the outBuffer with an already decoded video frame.
638 		frame to.
640 		copied video frames (usually one video frame).
642 		decoded video frame properties.
645 	\returns B_OK Decoding a video frame succeeded.
669 /*!	\brief Decodes next audio frame.
671 	We decode at least one audio frame into fDecodedData. To achieve this goal,
675     The length of the decoded audio frame(s) is stored in
699 		3. fHeader is populated with the audio frame properties of the first
700 		   audio frame in fDecodedData. Especially the start_time field of
701 		   fHeader relates to that first audio frame. Start times of
703 		   manually (using the frame rate and the frame duration) if the
707 	the audio frame size and thus has different buffer requirements.
756 	TRACE_AUDIO("  frame count: %d current: %" B_PRId64 "\n",
900 		- fRawDecodedAudio->format: Format of first audio frame
901 		- fRawDecodedAudio->pkt_dts: Start time of first audio frame
904 		  audio frame:
905 		      - channels: Channel count of first audio frame
906 		      - sample_rate: Frame rate of first audio frame
915 		3. The audio frame rate is known so that we can calculate the time
945 		debugger("fDecodedDataBufferSize not multiple of frame size!");
1052 	\returns B_OK on successfully decoding one audio frame chunk.
1053 	\returns B_LAST_BUFFER_ERROR No more audio frame chunks available. From
1095 /*!	\brief Tries to decode at least one audio frame and store it in the
1111 	When this function failed to decode at least one audio frame due to a
1116 	Note: It is possible that there wasn't any audio frame decoded into
1164 		properties of the most recently decoded audio frame.
1177 		1. We actually got a new audio frame decoded by the audio decoder.
1178 		2. fHeader wasn't updated for the new audio frame yet. You MUST call
1179 		   this method only once per decoded audio frame.
1180 		3. fRawDecodedAudio's fields relate to the first audio frame contained
1182 		       - fRawDecodedAudio->pkt_dts: Start time of first audio frame
1184 		         the first audio frame:
1185 			         - channels: Channel count of first audio frame
1186 			         - sample_rate: Frame rate of first audio frame
1204 /*! \brief Decodes next video frame.
1206     We decode exactly one video frame into fDecodedData. To achieve this goal,
1210     The length of the decoded video frame is stored in
1212     assert that there is a valid video frame available in fDecodedData.
1214     The decoded video frame in fDecodedData has color space conversion and
1217     To every decoded video frame there is a media_header populated in
1218     fHeader, containing the corresponding video frame properties.
1220 	Normally every decoded video frame has a start_time field populated in the
1221 	associated fHeader, that determines the presentation time of the frame.
1224 	frame (one complete frame) - not more and not less.
1226 	We can decode data chunks that contain partial video frame data, too. In
1229 	between an incomplete frame and the start time it should be presented.
1232 	We can decode data chunks that contain more than one video frame, too. In
1235 	video frames. So a meaningful relationship between the 2nd, 3rd, ... frame
1242 	\returns B_OK when we successfully decoded one video frame
1282 				TRACE("[v] AVCodecDecoder: ignoring error in decoding frame %" B_PRId64 ": %d\n",
1292 				TRACE("[v] frame %" B_PRId64 " decoding error: error code: %d, chunk size: %ld\n",
1409 		// decoded a/v frame. By doing so we are simply copying the way how it
1488 /*! \brief Executes all steps needed for a freshly decoded video frame.
1494 	\returns B_OK when video frame was handled successfully
1515 /*! \brief Flushes one video frame - if any - still buffered by the decoder.
1524 	\returns B_OK Retrieved one video frame, handled it accordingly and updated
1529 	\returns B_LAST_BUFFER_ERROR No video frame left.
1540 	// Get any remaining frame
1554 		properties of the most recently decoded video frame.
1560 		   method only once per decoded video frame.
1564 		4. There will be at maximumn only one decoded video frame in our cache
1566 		   cached decoded video frame the properties in fHeader relate to.
1567 		5. AVCodecContext is still valid for this video frame (This is the case
1607 	conversion to the video frame in fRawDecodedPicture.
1619 	When this function finishes the postprocessed video frame will be available
1623 	\returns B_OK video frame successfully deinterlaced and color converted.
1656 	// Some decoders do not set pix_fmt until they have decoded 1 frame
1790     We decode exactly one video frame into dst.
1793 	\returns B_OK video frame successfully deinterlaced.
1794 	\returns B_BAD_DATA No frame could be output.