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32 #define FF_INTERNAL_FIELDS 1
63 #define NB_ITEMS(list) (list ## _size / sizeof(*list))
73 for (
i = 0;
i < nb_counts;
i++)
76 for (
i = lc = 0;
i < nb_layouts;
i++) {
78 if (n < 64 && (counts & ((uint64_t)1 << n)))
80 "Removing channel layout 0x%"PRIx64
", redundant with %d channels\n",
130 }
else if (
inlink->frame_wanted_out) {
151 #if FF_API_BUFFERSINK_ALLOC
155 AVBufferSinkParams *params =
av_malloc(
sizeof(AVBufferSinkParams));
165 AVABufferSinkParams *params =
av_mallocz(
sizeof(AVABufferSinkParams));
188 "%d buffers queued in %s, something may be wrong.\n",
205 #define MAKE_AVFILTERLINK_ACCESSOR(type, field) \
206 type av_buffersink_get_##field(const AVFilterContext *ctx) { \
207 av_assert0(ctx->filter->activate == activate); \
208 return ctx->inputs[0]->field; \
226 #define CHECK_LIST_SIZE(field) \
227 if (buf->field ## _size % sizeof(*buf->field)) { \
228 av_log(ctx, AV_LOG_ERROR, "Invalid size for " #field ": %d, " \
229 "should be multiple of %d\n", \
230 buf->field ## _size, (int)sizeof(*buf->field)); \
231 return AVERROR(EINVAL); \
288 "Conflicting all_channel_counts and list in options\n");
308 #define OFFSET(x) offsetof(BufferSinkContext, x)
309 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
315 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_AUDIO_PARAM
337 .
name =
"buffersink",
338 .description =
NULL_IF_CONFIG_SMALL(
"Buffer video frames, and make them available to the end of the filter graph."),
340 .priv_class = &buffersink_class,
356 .
name =
"abuffersink",
357 .description =
NULL_IF_CONFIG_SMALL(
"Buffer audio frames, and make them available to the end of the filter graph."),
358 .priv_class = &abuffersink_class,
static const AVFilterPad avfilter_vsink_buffer_inputs[]
A list of supported channel layouts.
#define AV_LOG_WARNING
Something somehow does not look correct.
int attribute_align_arg av_buffersink_get_samples(AVFilterContext *ctx, AVFrame *frame, int nb_samples)
Same as av_buffersink_get_frame(), but with the ability to specify the number of samples read.
AVPixelFormat
Pixel format.
they must not be accessed directly The fifo field contains the frames that are queued in the input for processing by the filter The status_in and status_out fields contains the queued status(EOF or error) of the link
static const AVOption abuffersink_options[]
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
enum AVSampleFormat * sample_fmts
list of accepted sample formats
static enum AVSampleFormat sample_fmts[]
enum MovChannelLayoutTag * layouts
int attribute_align_arg av_buffersink_get_frame_flags(AVFilterContext *ctx, AVFrame *frame, int flags)
Get a frame with filtered data from sink and put it in frame.
The exact code depends on how similar the blocks are and how related they are to the and needs to apply these operations to the correct inlink or outlink if there are several Macros are available to factor that when no extra processing is inlink
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
This structure describes decoded (raw) audio or video data.
#define FILTER_QUERY_FUNC(func)
static enum AVPixelFormat pixel_fmts[]
int ff_filter_graph_run_once(AVFilterGraph *graph)
Run one round of processing on a filter graph.
const char * name
Filter name.
A link between two filters.
#define CHECK_LIST_SIZE(field)
int64_t * channel_layouts
list of accepted channel layouts
int ff_inlink_consume_frame(AVFilterLink *link, AVFrame **rframe)
Take a frame from the link's FIFO and update the link's stats.
const AVFilter ff_asink_abuffer
void av_buffersink_set_frame_size(AVFilterContext *ctx, unsigned frame_size)
Set the frame size for an audio buffer sink.
@ AV_OPT_TYPE_BINARY
offset must point to a pointer immediately followed by an int for the length
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf type
enum AVPixelFormat * pixel_fmts
list of accepted pixel formats
A filter pad used for either input or output.
#define AV_BUFFERSINK_FLAG_PEEK
Tell av_buffersink_get_buffer_ref() to read video/samples buffer reference, but not remove it from th...
void ff_inlink_request_frame(AVFilterLink *link)
Mark that a frame is wanted on the link.
AVABufferSinkParams * av_abuffersink_params_alloc(void)
static int return_or_keep_frame(BufferSinkContext *buf, AVFrame *out, AVFrame *in, int flags)
static void cleanup_redundant_layouts(AVFilterContext *ctx)
int attribute_align_arg av_buffersink_get_frame(AVFilterContext *ctx, AVFrame *frame)
Get a frame with filtered data from sink and put it in frame.
AVFILTER_DEFINE_CLASS(buffersink)
#define FILTER_INPUTS(array)
static int activate(AVFilterContext *ctx)
Describe the class of an AVClass context structure.
int ff_inlink_consume_samples(AVFilterLink *link, unsigned min, unsigned max, AVFrame **rframe)
Take samples from the link's FIFO and update the link's stats.
Rational number (pair of numerator and denominator).
AVBufferSinkParams * av_buffersink_params_alloc(void)
static int vsink_query_formats(AVFilterContext *ctx)
int ff_inlink_acknowledge_status(AVFilterLink *link, int *rstatus, int64_t *rpts)
Test and acknowledge the change of status on the link.
static const AVOption buffersink_options[]
int av_get_channel_layout_nb_channels(uint64_t channel_layout)
Return the number of channels in the channel layout.
static const AVFilterPad avfilter_asink_abuffer_inputs[]
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
static av_cold int common_init(AVFilterContext *ctx)
#define i(width, name, range_min, range_max)
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
AVSampleFormat
Audio sample formats.
void av_frame_move_ref(AVFrame *dst, AVFrame *src)
Move everything contained in src to dst and reset src.
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
const char * name
Pad name.
const AVFilter ff_vsink_buffer
#define AV_BUFFERSINK_FLAG_NO_REQUEST
Tell av_buffersink_get_buffer_ref() not to request a frame from its input.
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
static size_t ff_framequeue_queued_frames(const FFFrameQueue *fq)
Get the number of queued frames.
static const uint8_t channel_counts[7]
int * channel_counts
list of accepted channel counts
Filter the word “frame” indicates either a video frame or a group of audio samples
static int get_frame_internal(AVFilterContext *ctx, AVFrame *frame, int flags, int samples)
A reference to a data buffer.
#define MAKE_AVFILTERLINK_ACCESSOR(type, field)
static int asink_query_formats(AVFilterContext *ctx)
static const uint16_t channel_layouts[7]
#define flags(name, subs,...)
int * sample_rates
list of accepted sample rates
static void * av_x_if_null(const void *p, const void *x)
Return x default pointer in case p is NULL.