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FFmpeg
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a very simple circular buffer FIFO implementation More...
Go to the source code of this file.
Data Structures | |
| struct | AVFifoBuffer |
Functions | |
| AVFifoBuffer * | av_fifo_alloc (unsigned int size) |
| Initialize an AVFifoBuffer. More... | |
| AVFifoBuffer * | av_fifo_alloc_array (size_t nmemb, size_t size) |
| Initialize an AVFifoBuffer. More... | |
| void | av_fifo_free (AVFifoBuffer *f) |
| Free an AVFifoBuffer. More... | |
| void | av_fifo_freep (AVFifoBuffer **f) |
| Free an AVFifoBuffer and reset pointer to NULL. More... | |
| void | av_fifo_reset (AVFifoBuffer *f) |
| Reset the AVFifoBuffer to the state right after av_fifo_alloc, in particular it is emptied. More... | |
| int | av_fifo_size (const AVFifoBuffer *f) |
| Return the amount of data in bytes in the AVFifoBuffer, that is the amount of data you can read from it. More... | |
| int | av_fifo_space (const AVFifoBuffer *f) |
| Return the amount of space in bytes in the AVFifoBuffer, that is the amount of data you can write into it. More... | |
| int | av_fifo_generic_peek_at (AVFifoBuffer *f, void *dest, int offset, int buf_size, void(*func)(void *, void *, int)) |
| Feed data at specific position from an AVFifoBuffer to a user-supplied callback. More... | |
| int | av_fifo_generic_peek (AVFifoBuffer *f, void *dest, int buf_size, void(*func)(void *, void *, int)) |
| Feed data from an AVFifoBuffer to a user-supplied callback. More... | |
| int | av_fifo_generic_read (AVFifoBuffer *f, void *dest, int buf_size, void(*func)(void *, void *, int)) |
| Feed data from an AVFifoBuffer to a user-supplied callback. More... | |
| int | av_fifo_generic_write (AVFifoBuffer *f, void *src, int size, int(*func)(void *, void *, int)) |
| Feed data from a user-supplied callback to an AVFifoBuffer. More... | |
| int | av_fifo_realloc2 (AVFifoBuffer *f, unsigned int size) |
| Resize an AVFifoBuffer. More... | |
| int | av_fifo_grow (AVFifoBuffer *f, unsigned int additional_space) |
| Enlarge an AVFifoBuffer. More... | |
| void | av_fifo_drain (AVFifoBuffer *f, int size) |
| Read and discard the specified amount of data from an AVFifoBuffer. More... | |
| static uint8_t * | av_fifo_peek2 (const AVFifoBuffer *f, int offs) |
| Return a pointer to the data stored in a FIFO buffer at a certain offset. More... | |
a very simple circular buffer FIFO implementation
Definition in file fifo.h.
| AVFifoBuffer* av_fifo_alloc | ( | unsigned int | size | ) |
Initialize an AVFifoBuffer.
| size | of FIFO |
Definition at line 43 of file fifo.c.
Referenced by av_audio_fifo_alloc(), av_fifo_realloc2(), av_thread_message_queue_alloc(), ff_qsv_enc_init(), init_audio(), init_video(), libvorbis_encode_init(), mpeg_mux_init(), qsv_decode_init(), qsv_packet_push_front(), ring_init(), swf_write_header(), and udp_open().
| AVFifoBuffer* av_fifo_alloc_array | ( | size_t | nmemb, |
| size_t | size | ||
| ) |
Initialize an AVFifoBuffer.
| nmemb | number of elements |
| size | size of the single element |
Definition at line 49 of file fifo.c.
Referenced by common_init(), dv_init_mux(), ff_audio_interleave_init(), ff_frame_thread_encoder_init(), flac_parse_init(), init(), and start_jack().
| void av_fifo_free | ( | AVFifoBuffer * | f | ) |
Free an AVFifoBuffer.
| f | AVFifoBuffer to free |
Definition at line 55 of file fifo.c.
Referenced by av_audio_fifo_free(), av_fifo_freep(), ff_qsv_decode_close(), ff_qsv_enc_close(), and qsv_packet_push_front().
| void av_fifo_freep | ( | AVFifoBuffer ** | f | ) |
Free an AVFifoBuffer and reset pointer to NULL.
| f | AVFifoBuffer to free |
Definition at line 63 of file fifo.c.
Referenced by av_thread_message_queue_free(), dv_delete_mux(), dv_init_mux(), ff_audio_interleave_close(), ff_frame_thread_encoder_free(), flac_parse_close(), free_pkt_fifo(), libvorbis_encode_close(), mpeg_mux_end(), ring_destroy(), swf_write_trailer(), udp_close(), udp_open(), and uninit().
| void av_fifo_reset | ( | AVFifoBuffer * | f | ) |
Reset the AVFifoBuffer to the state right after av_fifo_alloc, in particular it is emptied.
| f | AVFifoBuffer to reset |
Definition at line 71 of file fifo.c.
Referenced by av_audio_fifo_reset(), do_qsv_decode(), ff_qsv_decode_reset(), fifo_alloc_common(), and ring_reset().
| int av_fifo_size | ( | const AVFifoBuffer * | f | ) |
Return the amount of data in bytes in the AVFifoBuffer, that is the amount of data you can read from it.
| f | AVFifoBuffer to read from |
Definition at line 77 of file fifo.c.
Referenced by add_buffer_ref(), av_buffersink_get_frame_flags(), av_buffersrc_add_frame_internal(), av_fifo_drain(), av_fifo_grow(), av_fifo_realloc2(), av_fifo_space(), av_thread_message_flush(), do_qsv_decode(), dv_assemble_frame(), ff_audio_rechunk_interleave(), ff_qsv_decode(), ff_qsv_decode_reset(), ff_qsv_enc_close(), ff_qsv_encode(), filter_frame(), find_new_headers(), flac_parse(), flush_fifo(), flush_packet(), free_pkt_fifo(), get_best_header(), interleave_new_audio_packet(), libvorbis_encode_frame(), mpeg_mux_end(), mpeg_mux_write_packet(), output_packet(), poll_frame(), process_callback(), qsv_fifo_relocate(), qsv_packet_push_front(), request_frame(), ring_size(), swf_write_audio(), swf_write_video(), udp_read(), uninit(), worker(), and write_to_fifo().
| int av_fifo_space | ( | const AVFifoBuffer * | f | ) |
Return the amount of space in bytes in the AVFifoBuffer, that is the amount of data you can write into it.
| f | AVFifoBuffer to write into |
Definition at line 82 of file fifo.c.
Referenced by add_buffer_ref(), av_buffersrc_add_frame_internal(), do_qsv_decode(), ff_qsv_encode(), flac_parse(), libvorbis_encode_frame(), process_callback(), qsv_packet_push_front(), ring_space(), supply_new_packets(), and write_to_fifo().
| int av_fifo_generic_peek_at | ( | AVFifoBuffer * | f, |
| void * | dest, | ||
| int | offset, | ||
| int | buf_size, | ||
| void(*)(void *, void *, int) | func | ||
| ) |
Feed data at specific position from an AVFifoBuffer to a user-supplied callback.
Similar as av_fifo_gereric_read but without discarding data.
| f | AVFifoBuffer to read from |
| offset | offset from current read position |
| buf_size | number of bytes to read |
| func | generic read function |
| dest | data destination |
Definition at line 151 of file fifo.c.
Referenced by av_thread_message_flush(), and ring_generic_read().
| int av_fifo_generic_peek | ( | AVFifoBuffer * | f, |
| void * | dest, | ||
| int | buf_size, | ||
| void(*)(void *, void *, int) | func | ||
| ) |
Feed data from an AVFifoBuffer to a user-supplied callback.
Similar as av_fifo_gereric_read but without discarding data.
| f | AVFifoBuffer to read from |
| buf_size | number of bytes to read |
| func | generic read function |
| dest | data destination |
Definition at line 189 of file fifo.c.
Referenced by av_audio_fifo_peek().
| int av_fifo_generic_read | ( | AVFifoBuffer * | f, |
| void * | dest, | ||
| int | buf_size, | ||
| void(*)(void *, void *, int) | func | ||
| ) |
Feed data from an AVFifoBuffer to a user-supplied callback.
| f | AVFifoBuffer to read from |
| buf_size | number of bytes to read |
| func | generic read function |
| dest | data destination |
Definition at line 213 of file fifo.c.
Referenced by audio_read_packet(), av_audio_fifo_read(), av_buffersink_get_frame_flags(), av_fifo_realloc2(), do_qsv_decode(), ff_qsv_decode(), ff_qsv_decode_reset(), ff_qsv_enc_close(), ff_qsv_encode(), filter_frame(), flush_fifo(), flush_packet(), free_pkt_fifo(), interleave_new_audio_packet(), libvorbis_encode_frame(), process_callback(), qsv_packet_push_front(), request_frame(), swf_write_video(), udp_read(), uninit(), and worker().
| int av_fifo_generic_write | ( | AVFifoBuffer * | f, |
| void * | src, | ||
| int | size, | ||
| int(*)(void *, void *, int) | func | ||
| ) |
Feed data from a user-supplied callback to an AVFifoBuffer.
| f | AVFifoBuffer to write to |
| src | data source; non-const since it may be used as a modifiable context by the function defined in func |
| size | number of bytes to write |
| func | generic write function; the first parameter is src, the second is dest_buf, the third is dest_buf_size. func must return the number of bytes written to dest_buf, or <= 0 to indicate no more data available to write. If func is NULL, src is interpreted as a simple byte array for source data. |
Definition at line 122 of file fifo.c.
Referenced by add_buffer_ref(), av_audio_fifo_write(), av_buffersrc_add_frame_internal(), do_qsv_decode(), dv_assemble_frame(), encode_frame(), ff_audio_rechunk_interleave(), ff_qsv_decode(), ff_thread_video_encode_frame(), flac_parse(), libvorbis_encode_frame(), mpeg_mux_write_packet(), process_callback(), qsv_packet_push_front(), ring_generic_write(), supply_new_packets(), swf_write_audio(), and write_to_fifo().
| int av_fifo_realloc2 | ( | AVFifoBuffer * | f, |
| unsigned int | size | ||
| ) |
Resize an AVFifoBuffer.
In case of reallocation failure, the old FIFO is kept unchanged.
| f | AVFifoBuffer to resize |
| size | new AVFifoBuffer size in bytes |
Definition at line 87 of file fifo.c.
Referenced by add_buffer_ref(), av_audio_fifo_realloc(), av_buffersrc_add_frame_internal(), av_fifo_grow(), ff_audio_rechunk_interleave(), flac_parse(), mpeg_mux_write_packet(), and write_to_fifo().
| int av_fifo_grow | ( | AVFifoBuffer * | f, |
| unsigned int | additional_space | ||
| ) |
Enlarge an AVFifoBuffer.
In case of reallocation failure, the old FIFO is kept unchanged. The new fifo size may be larger than the requested size.
| f | AVFifoBuffer to resize |
| additional_space | the amount of space in bytes to allocate in addition to av_fifo_size() |
Definition at line 107 of file fifo.c.
Referenced by do_qsv_decode().
| void av_fifo_drain | ( | AVFifoBuffer * | f, |
| int | size | ||
| ) |
Read and discard the specified amount of data from an AVFifoBuffer.
| f | AVFifoBuffer to read from |
| size | amount of data to read in bytes |
Read and discard the specified amount of data from an AVFifoBuffer.
Definition at line 233 of file fifo.c.
Referenced by av_audio_fifo_drain(), av_fifo_generic_read(), av_thread_message_flush(), dv_assemble_frame(), flac_parse(), qsv_fifo_relocate(), ring_generic_read(), and udp_read().
|
inlinestatic |
Return a pointer to the data stored in a FIFO buffer at a certain offset.
The FIFO buffer is not modified.
| f | AVFifoBuffer to peek at, f must be non-NULL |
| offs | an offset in bytes, its absolute value must be less than the used buffer size or the returned pointer will point outside to the buffer data. The used buffer size can be checked with av_fifo_size(). |
Definition at line 169 of file fifo.h.
Referenced by av_buffersink_get_frame_flags(), and dv_inject_audio().
1.8.6