Libav
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AVFrame is an abstraction for reference-counted raw multimedia data. More...
Files | |
file | frame.h |
reference-counted frame API |
Data Structures | |
struct | AVFrameSideData |
struct | AVFrame |
This structure describes decoded (raw) audio or video data. More... |
Enumerations | |
enum | AVFrameSideDataType { AV_FRAME_DATA_PANSCAN, AV_FRAME_DATA_A53_CC, AV_FRAME_DATA_STEREO3D, AV_FRAME_DATA_MATRIXENCODING, AV_FRAME_DATA_DOWNMIX_INFO } |
Functions | |
AVFrame * | av_frame_alloc (void) |
Allocate an AVFrame and set its fields to default values. | |
void | av_frame_free (AVFrame **frame) |
Free the frame and any dynamically allocated objects in it, e.g. | |
int | av_frame_ref (AVFrame *dst, const AVFrame *src) |
Set up a new reference to the data described by the source frame. | |
AVFrame * | av_frame_clone (const AVFrame *src) |
Create a new frame that references the same data as src. | |
void | av_frame_unref (AVFrame *frame) |
Unreference all the buffers referenced by frame and reset the frame fields. | |
void | av_frame_move_ref (AVFrame *dst, AVFrame *src) |
Move everythnig contained in src to dst and reset src. | |
int | av_frame_get_buffer (AVFrame *frame, int align) |
Allocate new buffer(s) for audio or video data. | |
int | av_frame_is_writable (AVFrame *frame) |
Check if the frame data is writable. | |
int | av_frame_make_writable (AVFrame *frame) |
Ensure that the frame data is writable, avoiding data copy if possible. | |
int | av_frame_copy_props (AVFrame *dst, const AVFrame *src) |
Copy only "metadata" fields from src to dst. | |
AVBufferRef * | av_frame_get_plane_buffer (AVFrame *frame, int plane) |
Get the buffer reference a given data plane is stored in. | |
AVFrameSideData * | av_frame_new_side_data (AVFrame *frame, enum AVFrameSideDataType type, int size) |
Add a new side data to a frame. | |
AVFrameSideData * | av_frame_get_side_data (const AVFrame *frame, enum AVFrameSideDataType type) |
AVFrame is an abstraction for reference-counted raw multimedia data.
enum AVFrameSideDataType |
AV_FRAME_DATA_PANSCAN |
The data is the AVPanScan struct defined in libavcodec. |
AV_FRAME_DATA_A53_CC |
ATSC A53 Part 4 Closed Captions. A53 CC bitstream is stored as uint8_t in AVFrameSideData.data. The number of bytes of CC data is AVFrameSideData.size. |
AV_FRAME_DATA_STEREO3D |
Stereoscopic 3d metadata. The data is the AVStereo3D struct defined in libavutil/stereo3d.h. |
AV_FRAME_DATA_MATRIXENCODING |
The data is the AVMatrixEncoding enum defined in libavutil/channel_layout.h. |
AV_FRAME_DATA_DOWNMIX_INFO |
Metadata relevant to a downmix procedure. The data is the AVDownmixInfo struct defined in libavutil/downmix_info.h. |
Allocate an AVFrame and set its fields to default values.
The resulting struct must be freed using av_frame_free().
Definition at line 43 of file frame.c.
Referenced by a64multi_init_encoder(), aasc_decode_init(), alac_encode_init(), alloc_picture(), audio_decode_example(), audio_decode_frame(), audio_encode_example(), av_buffersrc_add_frame(), av_buffersrc_write_frame(), av_frame_clone(), avcodec_open2(), avs_decode_init(), bethsoftvid_decode_init(), bmp_encode_init(), cdg_decode_init(), cinepak_decode_init(), cinvideo_decode_init(), cmv_decode_init(), config_output(), decode_audio(), decode_entropy_coded_image(), decode_init(), decode_video(), dnxhd_encode_init(), dvvideo_init_encoder(), encode_init(), encode_init_ls(), escape124_decode_init(), ff_cavs_init(), ff_default_get_audio_buffer(), ff_default_get_video_buffer(), ff_frame_thread_init(), ff_mjpeg_decode_init(), ff_MPV_encode_init(), ff_vp56_init(), ffv1_decode_init(), ffv1_encode_init(), fic_decode_init(), flashsv_decode_init(), flashsv_encode_init(), flic_decode_init(), gif_encode_init(), hevc_init_context(), init_frames(), init_input_frame(), init_output_frame(), ipvideo_decode_init(), ir2_decode_init(), join_request_frame(), libopenjpeg_encode_init(), libschroedinger_encode_init(), libwebp_encode_frame(), ljpeg_encode_init(), mimic_decode_init(), mimic_init_thread_copy(), mm_decode_init(), movie_get_frame(), mp_decode_init(), msrle_decode_init(), mss1_decode_init(), mss2_decode_init(), mss3_decode_init(), mss4_decode_init(), msvideo1_decode_init(), mxpeg_decode_init(), pad_last_frame(), pam_encode_init(), pcm_encode_init(), pcx_encode_init(), png_dec_init(), png_enc_init(), pnm_encode_init(), poll_filter(), qtrle_decode_init(), qtrle_encode_init(), roq_decode_init(), roq_encode_init(), rpza_decode_init(), seqvideo_decode_init(), smc_decode_init(), sunrast_encode_init(), svq1_decode_init(), svq1_encode_init(), targa_encode_init(), tgv_decode_init(), truemotion1_decode_init(), try_decode_frame(), tscc2_decode_init(), ulti_decode_init(), utvideo_encode_init(), v410_encode_init(), vc1_decode_init(), vdpau_alloc(), video_decode_example(), video_encode_example(), video_thread(), vmdvideo_decode_init(), vp8_init_frames(), vp8_lossy_decode_alpha(), vp9_decode_init(), vpx_init(), write_audio_frame(), X264_init(), xan_decode_init(), XAVS_init(), xbm_encode_init(), xvid_encode_init(), xwd_encode_init(), and zerocodec_decode_init().
Free the frame and any dynamically allocated objects in it, e.g.
extended_data. If the frame is reference counted, it will be unreferenced first.
frame | frame to be freed. The pointer will be set to NULL. |
Definition at line 55 of file frame.c.
Referenced by a64multi_close_encoder(), aasc_decode_end(), add_to_queue(), asv_encode_close(), audio_decode_example(), audio_encode_example(), av_buffersink_get_frame(), av_buffersink_get_samples(), av_buffersrc_add_frame(), av_buffersrc_write_frame(), av_frame_clone(), avcodec_close(), avcodec_encode_audio2(), avcodec_open2(), avconv_cleanup(), avs_decode_end(), bethsoftvid_decode_end(), bmp_encode_close(), cdg_decode_end(), channelmap_filter_frame(), cinepak_decode_end(), cinvideo_decode_end(), cmv_decode_end(), cmv_decode_init(), compand_delay(), compand_nodelay(), decode_close(), decode_end(), dnxhd_encode_end(), dvvideo_encode_close(), encode_close(), encode_end(), escape124_decode_close(), ff_cavs_end(), ff_default_get_audio_buffer(), ff_default_get_video_buffer(), ff_filter_frame(), ff_frame_thread_free(), ff_mjpeg_decode_end(), ff_MPV_encode_end(), ff_vc1_decode_end(), ff_vp56_free(), ff_vp8_decode_free(), ffv1_decode_close(), ffv1_encode_close(), fic_decode_close(), filter_frame(), flashsv_decode_end(), flashsv_encode_end(), flic_decode_end(), flush_fifo(), framepack_uninit(), gif_encode_close(), hevc_decode_free(), image_ctx_free(), init_frames(), init_output_frame(), ipvideo_decode_end(), ipvideo_decode_init(), ir2_decode_end(), join_request_frame(), join_uninit(), libschroedinger_encode_close(), libwebp_encode_frame(), ljpeg_encode_close(), load_encode_and_write(), mimic_decode_end(), mm_decode_end(), mp_decode_end(), msrle_decode_end(), mss1_decode_end(), mss2_decode_end(), mss3_decode_end(), mss4_decode_end(), msvideo1_decode_end(), mxpeg_decode_end(), null_filter_frame(), output_frame(), pad_last_frame(), pam_encode_close(), pcx_encode_close(), png_dec_end(), png_enc_close(), pnm_encode_close(), qtrle_decode_end(), qtrle_encode_end(), read_decode_convert_and_store(), read_from_fifo(), request_frame(), return_audio_frame(), roq_decode_end(), roq_decode_init(), roq_encode_end(), rpza_decode_end(), seqvideo_decode_end(), smc_decode_end(), stream_component_close(), sunrast_encode_close(), svq1_decode_end(), svq1_encode_end(), targa_encode_close(), tgv_decode_end(), truemotion1_decode_end(), try_decode_frame(), tscc2_decode_end(), ulti_decode_end(), uninit(), vdpau_uninit(), video_decode_example(), video_encode_example(), video_thread(), vmdvideo_decode_end(), vp3_decode_end(), vp8_lossy_decode_alpha(), vp9_decode_free(), write_audio_frame(), write_to_fifo(), X264_close(), xan_decode_end(), XAVS_close(), and zerocodec_decode_close().
Set up a new reference to the data described by the source frame.
Copy frame properties from src to dst and create a new reference for each AVBufferRef from src.
If src is not reference counted, new buffers are allocated and the data is copied.
Definition at line 174 of file frame.c.
Referenced by aasc_decode_frame(), av_buffersrc_add_frame(), av_buffersrc_write_frame(), av_frame_clone(), avs_decode_frame(), bethsoftvid_decode_frame(), cavs_decode_frame(), cdg_decode_frame(), cinepak_decode_frame(), cinvideo_decode_frame(), cmv_decode_frame(), decode_frame(), decode_frame_byterun1(), decode_frame_ilbm(), decode_video(), escape124_decode_frame(), ff_h263_decode_frame(), ff_hevc_output_frame(), ff_mjpeg_decode_frame(), ff_rv34_decode_frame(), ff_thread_ref_frame(), ff_vp56_decode_frame(), ff_vp8_decode_frame(), ffv1_decode_frame(), fic_decode_frame(), finish_frame(), flashsv_decode_frame(), flic_decode_frame_15_16BPP(), flic_decode_frame_8BPP(), h261_decode_frame(), ipvideo_decode_frame(), ir2_decode_frame(), load_input_picture(), mimic_decode_frame(), mjpegb_decode_frame(), mm_decode_frame(), mp_decode_frame(), mpeg_decode_frame(), msrle_decode_frame(), mss1_decode_frame(), mss2_decode_frame(), mss3_decode_frame(), mss4_decode_frame(), msvideo1_decode_frame(), mxpeg_decode_frame(), output_frame(), qtrle_decode_frame(), roq_decode_frame(), rpza_decode_frame(), rv10_decode_frame(), seqvideo_decode_frame(), slice_end(), smc_decode_frame(), svq1_decode_frame(), svq3_decode_frame(), tgv_decode_frame(), truemotion1_decode_frame(), tscc2_decode_frame(), ulti_decode_frame(), vc1_decode_frame(), vmdvideo_decode_frame(), vp9_decode_frame(), xan_decode_frame(), and zerocodec_decode_frame().
Create a new frame that references the same data as src.
This is a shortcut for av_frame_alloc()+av_frame_ref().
Definition at line 260 of file frame.c.
Referenced by filter_frame(), request_frame(), and return_audio_frame().
Unreference all the buffers referenced by frame and reset the frame fields.
Definition at line 273 of file frame.c.
Referenced by audio_get_buffer(), av_frame_free(), av_frame_make_writable(), av_frame_ref(), avcodec_decode_audio4(), avcodec_decode_video2(), avcodec_default_release_buffer(), avcodec_flush_buffers(), cavs_decode_frame(), cdg_decode_frame(), cmv_decode_frame(), cmv_process_header(), codec_reinit(), decode_frame(), decode_pic(), decode_subframe(), decode_update_thread_context(), decode_video(), escape124_decode_frame(), execute_code(), ff_h264_alloc_tables(), ff_mjpeg_decode_end(), ff_mjpeg_decode_sof(), ff_mpeg_unref_picture(), ff_MPV_common_init(), ff_reget_buffer(), ff_thread_flush(), ff_thread_release_buffer(), ff_vp56_decode_frame(), ffv1_decode_frame(), flashsv_decode_frame(), frame_configure_elements(), frame_worker_thread(), free_picture(), get_audio_buffer(), get_video_buffer(), get_video_frame(), hevc_frame_start(), ipvideo_decode_frame(), mss2_decode_frame(), mxpeg_decode_frame(), output_picture2(), poll_filter(), release_delayed_buffers(), select_input_picture(), set_sps(), svq1_decode_frame(), svq1_flush(), svq3_decode_end(), svq3_decode_frame(), tgv_decode_frame(), truemotion1_decode_header(), unrefcount_frame(), vdpau_retrieve_data(), video_get_buffer(), vmdvideo_decode_frame(), vorbis_decode_frame(), vp9_decode_flush(), vp9_decode_frame(), xan_decode_frame(), and zerocodec_decode_frame().
Move everythnig contained in src to dst and reset src.
Definition at line 292 of file frame.c.
Referenced by av_buffersink_get_frame(), av_buffersrc_add_frame(), cavs_decode_frame(), cmv_decode_frame(), decode_packet(), ff_reget_buffer(), ff_thread_decode_frame(), ff_thread_release_buffer(), hevc_decode_frame(), read_from_fifo(), unrefcount_frame(), and vdpau_retrieve_data().
int av_frame_get_buffer | ( | AVFrame * | frame, |
int | align | ||
) |
Allocate new buffer(s) for audio or video data.
The following fields must be set on frame before calling this function:
This function will fill AVFrame.data and AVFrame.buf arrays and, if necessary, allocate and fill AVFrame.extended_data and AVFrame.extended_buf. For planar formats, one buffer will be allocated for each plane.
frame | frame in which to store the new buffers. |
align | required buffer size alignment |
Definition at line 161 of file frame.c.
Referenced by av_frame_make_writable(), av_frame_ref(), config_output(), decode_entropy_coded_image(), ff_default_get_audio_buffer(), ff_default_get_video_buffer(), ff_MPV_encode_init(), init_output_frame(), libwebp_encode_frame(), pad_last_frame(), and vdpau_retrieve_data().
int av_frame_is_writable | ( | AVFrame * | frame | ) |
Check if the frame data is writable.
If 1 is returned the answer is valid until av_buffer_ref() is called on any of the underlying AVBufferRefs (e.g. through av_frame_ref() or directly).
Definition at line 301 of file frame.c.
Referenced by av_frame_make_writable(), compand_nodelay(), ff_filter_frame(), ff_reget_buffer(), filter_frame(), and frame_needs_copy().
int av_frame_make_writable | ( | AVFrame * | frame | ) |
Ensure that the frame data is writable, avoiding data copy if possible.
Do nothing if the frame is writable, allocate new buffers and copy the data if it is not.
Copy only "metadata" fields from src to dst.
Metadata for the purpose of this function are those fields that do not affect the data layout in the buffers. E.g. pts, sample rate (for audio) or sample aspect ratio (for video), but not width/height or channel layout. Side data is also copied.
Definition at line 362 of file frame.c.
Referenced by av_frame_make_writable(), av_frame_ref(), compand_delay(), compand_nodelay(), ff_filter_frame(), filter_frame(), load_input_picture(), pad_last_frame(), request_frame(), return_frame(), select_input_picture(), unrefcount_frame(), and vdpau_retrieve_data().
AVBufferRef* av_frame_get_plane_buffer | ( | AVFrame * | frame, |
int | plane | ||
) |
Get the buffer reference a given data plane is stored in.
plane | index of the data plane of interest in frame->extended_data. |
Definition at line 406 of file frame.c.
Referenced by buffer_needs_copy(), and join_request_frame().
AVFrameSideData* av_frame_new_side_data | ( | AVFrame * | frame, |
enum AVFrameSideDataType | type, | ||
int | size | ||
) |
Add a new side data to a frame.
frame | a frame to which the side data should be added |
type | type of the added side data |
size | size of the side data |
Definition at line 436 of file frame.c.
Referenced by av_downmix_info_update_side_data(), av_frame_copy_props(), av_stereo3d_create_side_data(), ff_side_data_update_matrix_encoding(), and mpeg_field_start().
AVFrameSideData* av_frame_get_side_data | ( | const AVFrame * | frame, |
enum AVFrameSideDataType | type | ||
) |
Definition at line 469 of file frame.c.
Referenced by av_downmix_info_update_side_data(), ff_mpeg1_encode_picture_header(), ff_side_data_update_matrix_encoding(), and X264_frame().