FFmpeg
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Files | |
file | buffersrc.h |
Data Structures | |
struct | AVBufferSrcParameters |
This structure contains the parameters describing the frames that will be passed to this filter. More... | |
Enumerations | |
enum | { AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT = 1, AV_BUFFERSRC_FLAG_PUSH = 4, AV_BUFFERSRC_FLAG_KEEP_REF = 8 } |
Functions | |
unsigned | av_buffersrc_get_nb_failed_requests (AVFilterContext *buffer_src) |
Get the number of failed requests. More... | |
AVBufferSrcParameters * | av_buffersrc_parameters_alloc (void) |
Allocate a new AVBufferSrcParameters instance. More... | |
int | av_buffersrc_parameters_set (AVFilterContext *ctx, AVBufferSrcParameters *param) |
Initialize the buffersrc or abuffersrc filter with the provided parameters. More... | |
av_warn_unused_result int | av_buffersrc_write_frame (AVFilterContext *ctx, const AVFrame *frame) |
Add a frame to the buffer source. More... | |
av_warn_unused_result int | av_buffersrc_add_frame (AVFilterContext *ctx, AVFrame *frame) |
Add a frame to the buffer source. More... | |
av_warn_unused_result int | av_buffersrc_add_frame_flags (AVFilterContext *buffer_src, AVFrame *frame, int flags) |
Add a frame to the buffer source. More... | |
int | av_buffersrc_close (AVFilterContext *ctx, int64_t pts, unsigned flags) |
Close the buffer source after EOF. More... | |
anonymous enum |
Definition at line 36 of file buffersrc.h.
unsigned av_buffersrc_get_nb_failed_requests | ( | AVFilterContext * | buffer_src | ) |
Get the number of failed requests.
A failed request is when the request_frame method is called while no frame is present in the buffer. The number is reset when a frame is added.
Definition at line 287 of file buffersrc.c.
Referenced by sub2video_heartbeat(), and transcode_from_filter().
AVBufferSrcParameters* av_buffersrc_parameters_alloc | ( | void | ) |
Allocate a new AVBufferSrcParameters instance.
It should be freed by the caller with av_free().
Definition at line 87 of file buffersrc.c.
Referenced by configure_input_video_filter().
int av_buffersrc_parameters_set | ( | AVFilterContext * | ctx, |
AVBufferSrcParameters * | param | ||
) |
Initialize the buffersrc or abuffersrc filter with the provided parameters.
This function may be called multiple times, the later calls override the previous ones. Some of the parameters may also be set through AVOptions, then whatever method is used last takes precedence.
ctx | an instance of the buffersrc or abuffersrc filter |
param | the stream parameters. The frames later passed to this filter must conform to those parameters. All the allocated fields in param remain owned by the caller, libavfilter will make internal copies or references when necessary. |
Definition at line 98 of file buffersrc.c.
Referenced by configure_input_video_filter().
av_warn_unused_result int av_buffersrc_write_frame | ( | AVFilterContext * | ctx, |
const AVFrame * | frame | ||
) |
Add a frame to the buffer source.
ctx | an instance of the buffersrc filter |
frame | frame to be added. If the frame is reference counted, this function will make a new reference to it. Otherwise the frame data will be copied. |
This function is equivalent to av_buffersrc_add_frame_flags() with the AV_BUFFERSRC_FLAG_KEEP_REF flag.
Definition at line 141 of file buffersrc.c.
av_warn_unused_result int av_buffersrc_add_frame | ( | AVFilterContext * | ctx, |
AVFrame * | frame | ||
) |
Add a frame to the buffer source.
ctx | an instance of the buffersrc filter |
frame | frame to be added. If the frame is reference counted, this function will take ownership of the reference(s) and reset the frame. Otherwise the frame data will be copied. If this function returns an error, the input frame is not touched. |
This function is equivalent to av_buffersrc_add_frame_flags() without the AV_BUFFERSRC_FLAG_KEEP_REF flag.
Definition at line 147 of file buffersrc.c.
Referenced by audio_thread(), configure_filtergraph(), main(), sub2video_flush(), and video_thread().
av_warn_unused_result int av_buffersrc_add_frame_flags | ( | AVFilterContext * | buffer_src, |
AVFrame * | frame, | ||
int | flags | ||
) |
Add a frame to the buffer source.
By default, if the frame is reference-counted, this function will take ownership of the reference(s) and reset the frame. This can be controlled using the flags.
If this function returns an error, the input frame is not touched.
buffer_src | pointer to a buffer source context |
frame | a frame, or NULL to mark EOF |
flags | a combination of AV_BUFFERSRC_FLAG_* |
Definition at line 155 of file buffersrc.c.
Referenced by av_buffersrc_add_frame(), av_buffersrc_write_frame(), filter_encode_write_frame(), ifilter_send_frame(), main(), and sub2video_push_ref().
int av_buffersrc_close | ( | AVFilterContext * | ctx, |
int64_t | pts, | ||
unsigned | flags | ||
) |
Close the buffer source after EOF.
This is similar to passing NULL to av_buffersrc_add_frame_flags() except it takes the timestamp of the EOF, i.e. the timestamp of the end of the last frame.
Definition at line 255 of file buffersrc.c.
Referenced by av_buffersrc_add_frame_internal(), and ifilter_send_eof().