Go to the documentation of this file.
49 #if FF_API_OLD_CHANNEL_LAYOUT
57 if (!
link->frame_pool) {
60 if (!
link->frame_pool)
63 int pool_channels = 0;
64 int pool_nb_samples = 0;
69 &pool_channels, &pool_nb_samples,
70 &pool_format, &pool_align) < 0) {
74 if (pool_channels !=
channels || pool_nb_samples < nb_samples ||
80 if (!
link->frame_pool)
90 #if FF_API_OLD_CHANNEL_LAYOUT
111 if (
link->dstpad->get_buffer.audio)
112 ret =
link->dstpad->get_buffer.audio(
link, nb_samples);
AVFrame * ff_get_audio_buffer(AVFilterLink *link, int nb_samples)
Request an audio samples buffer with a specific set of permissions.
#define FF_ENABLE_DEPRECATION_WARNINGS
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.
int av_samples_set_silence(uint8_t *const *audio_data, int offset, int nb_samples, int nb_channels, enum AVSampleFormat sample_fmt)
Fill an audio buffer with silence.
enum AVChannelOrder order
Channel order used in this layout.
int av_get_channel_layout_nb_channels(uint64_t channel_layout)
Return the number of channels in the channel layout.
int nb_channels
Number of channels in this layout.
A link between two filters.
AVChannelLayout ch_layout
Channel layout of the audio data.
A filter pad used for either input or output.
attribute_deprecated uint64_t channel_layout
Channel layout of the audio data.
@ AV_CHANNEL_ORDER_UNSPEC
Only the channel count is specified, without any further information about the channel order.
#define av_assert0(cond)
assert() equivalent, that is always enabled.
AVFrame * ff_null_get_audio_buffer(AVFilterLink *link, int nb_samples)
get_audio_buffer() handler for filters which simply pass audio along
AVFrame * ff_frame_pool_get(FFFramePool *pool)
Allocate a new AVFrame, reussing old buffers from the pool when available.
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 link
const AVFilterPad ff_audio_default_filterpad[1]
An AVFilterPad array whose only entry has name "default" and is of type AVMEDIA_TYPE_AUDIO.
size_t av_cpu_max_align(void)
Get the maximum data alignment that may be required by FFmpeg.
void ff_frame_pool_uninit(FFFramePool **pool)
Deallocate the frame pool.
int sample_rate
Sample rate of the audio data.
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames,...
static const uint8_t *BS_FUNC() align(BSCTX *bc)
Skip bits to a byte boundary.
int nb_samples
number of audio samples (per channel) described by this frame
uint8_t ** extended_data
pointers to the data planes/channels.
AVSampleFormat
Audio sample formats.
const char * name
Pad name.
FFFramePool * ff_frame_pool_audio_init(AVBufferRef *(*alloc)(size_t size), int channels, int nb_samples, enum AVSampleFormat format, int align)
Allocate and initialize an audio frame pool.
AVBufferRef * av_buffer_allocz(size_t size)
Same as av_buffer_alloc(), except the returned buffer will be initialized to zero.
int av_channel_layout_copy(AVChannelLayout *dst, const AVChannelLayout *src)
Make a copy of a channel layout.
#define FF_DISABLE_DEPRECATION_WARNINGS
AVFrame * ff_default_get_audio_buffer(AVFilterLink *link, int nb_samples)
default handler for get_audio_buffer() for audio inputs
int ff_frame_pool_get_audio_config(FFFramePool *pool, int *channels, int *nb_samples, enum AVSampleFormat *format, int *align)
Get the audio frame pool configuration.