56 if (min_samples <= 0 || min_samples > INT_MAX / s->
sample_size - 1)
91 pkt->
size -= drain_data;
92 pkt->
data += drain_data;
94 pkt->
dts += drain_samples;
96 pkt->
pts += drain_samples;
145 pkt->
size = data_size;
173 #define OFFSET(x) offsetof(PCMContext, x) 174 #define FLAGS (AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_BSF_PARAM) 212 .
name =
"pcm_rechunk",
214 .priv_class = &pcm_rechunk_class,
#define LIBAVUTIL_VERSION_INT
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
The bitstream filter state.
const char * av_default_item_name(void *ptr)
Return the context name.
void * priv_data
Opaque filter-specific private data.
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
#define av_assert0(cond)
assert() equivalent, that is always enabled.
void av_packet_free(AVPacket **pkt)
Free the packet, if the packet is reference counted, it will be unreferenced first.
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
void av_packet_move_ref(AVPacket *dst, AVPacket *src)
Move every field in src to dst and reset src.
#define AVERROR_EOF
End of file.
int av_packet_ref(AVPacket *dst, const AVPacket *src)
Setup a new reference to the data described by a given packet.
static void flush(AVBSFContext *ctx)
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
AVCodecID
Identify the syntax and semantics of the bitstream.
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
void av_packet_rescale_ts(AVPacket *pkt, AVRational src_tb, AVRational dst_tb)
Convert valid timing fields (timestamps / durations) in a packet from one timebase to another...
filter_frame For filters that do not use the this method is called when a frame is pushed to the filter s input It can be called at any time except in a reentrant way If the input frame is enough to produce then the filter should push the output frames on the output link immediately As an exception to the previous rule if the input frame is enough to produce several output frames then the filter needs output only at least one per link The additional frames can be left buffered in the filter
AVRational time_base_in
The timebase used for the timestamps of the input packets.
simple assert() macros that are a bit more flexible than ISO C assert().
const AVBitStreamFilter ff_pcm_rechunk_bsf
int av_packet_copy_props(AVPacket *dst, const AVPacket *src)
Copy only "properties" fields from src to dst.
AVRational time_base_out
The timebase used for the timestamps of the output packets.
static enum AVCodecID codec_ids[]
Libavcodec external API header.
static AVRational av_make_q(int num, int den)
Create an AVRational.
static int rechunk_filter(AVBSFContext *ctx, AVPacket *pkt)
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Describe the class of an AVClass context structure.
Rational number (pair of numerator and denominator).
static void drain_packet(AVPacket *pkt, int drain_data, int drain_samples)
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
int sample_rate
Audio only.
static int get_next_nb_samples(AVBSFContext *ctx)
static int send_packet(PCMContext *s, int nb_samples, AVPacket *pkt)
static int init(AVBSFContext *ctx)
static void uninit(AVBSFContext *ctx)
static const AVClass pcm_rechunk_class
static const AVOption options[]
AVPacket * av_packet_alloc(void)
Allocate an AVPacket and set its fields to default values.
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
int64_t av_rescale_q_rnd(int64_t a, AVRational bq, AVRational cq, enum AVRounding rnd)
Rescale a 64-bit integer by 2 rational numbers with specified rounding.
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
This structure stores compressed data.
AVCodecParameters * par_in
Parameters of the input stream.
int ff_bsf_get_packet_ref(AVBSFContext *ctx, AVPacket *pkt)
Called by bitstream filters to get packet for filtering.
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
#define AV_NOPTS_VALUE
Undefined timestamp value.