32 int start_pos,
type, temporal_id, spatial_id;
36 &type, &temporal_id, &spatial_id);
44 obu->
data = buf + start_pos;
50 "obu_type: %d, temporal_id: %d, spatial_id: %d, payload size: %d\n",
71 if (new_size >= INT_MAX /
sizeof(*tmp))
Memory handling functions.
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
int ff_av1_extract_obu(AV1OBU *obu, const uint8_t *buf, int length, void *logctx)
Extract an OBU from a raw bitstream.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
static av_always_inline unsigned int bytestream2_get_bytes_left(GetByteContext *g)
GetBitContext gb
GetBitContext initialized to the start of the payload.
static int parse_obu_header(const uint8_t *buf, int buf_size, int64_t *obu_size, int *start_pos, int *type, int *temporal_id, int *spatial_id)
void * av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
Reallocate the given buffer if it is not large enough, otherwise do nothing.
int ff_av1_packet_split(AV1Packet *pkt, const uint8_t *buf, int length, void *logctx)
Split an input packet into OBUs.
unsigned obus_allocated_size
void ff_av1_packet_uninit(AV1Packet *pkt)
Free all the allocated memory in the packet.
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
int size_bits
Size, in bits, of just the data, excluding the trailing_one_bit and any trailing padding.
An input packet split into OBUs.
int raw_size
Size of entire OBU, including header.
static int get_obu_bit_length(const uint8_t *buf, int size, int type)
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