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28 #define MAGIC "Packed Animation File V1.0\n(c) 1992-96 Amazing Studio\x0a\x1a"
83 for (
i = 0;
i < count;
i++) {
98 int frame_ms,
ret = 0;
154 p->
nb_frames > INT_MAX /
sizeof(uint32_t) ||
228 for (
i = 0;
i < count;
i++) {
static int read_header(AVFormatContext *s)
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 AVMediaType codec_type
General type of the encoded data.
static int read_probe(const AVProbeData *p)
#define AV_CHANNEL_LAYOUT_STEREO
AVStream * avformat_new_stream(AVFormatContext *s, const struct AVCodec *c)
Add a new stream to a media file.
#define AVERROR_EOF
End of file.
uint32_t * frames_offset_table
#define PAF_SOUND_FRAME_SIZE
uint32_t current_frame_count
uint32_t current_frame_block
static const uint16_t table[]
static int read_close(AVFormatContext *s)
uint32_t * blocks_count_table
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
int buf_size
Size of buf except extra allocated bytes.
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
int64_t duration
Decoding: duration of the stream, in stream time base.
uint32_t * blocks_offset_table
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
#define FF_INFMT_FLAG_INIT_CLEANUP
For an FFInputFormat with this flag set read_close() needs to be called by the caller upon read_heade...
AVCodecParameters * codecpar
Codec parameters associated with this stream.
This structure contains the data a format has to probe a file.
AVChannelLayout ch_layout
Audio only.
int sample_rate
Audio only.
int64_t nb_frames
number of frames in this stream if known or 0
static int read_packet(AVFormatContext *s, AVPacket *pkt)
unsigned int avio_rl32(AVIOContext *s)
uint8_t * temp_audio_frame
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
An AVChannelLayout holds information about the channel layout of audio data.
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 offset
int flags
A combination of AV_PKT_FLAG values.
#define i(width, name, range_min, range_max)
#define PAF_SOUND_SAMPLES
#define av_malloc_array(a, b)
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
const FFInputFormat ff_paf_demuxer
static int read_table(AVFormatContext *s, uint32_t *table, uint32_t count)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
This structure stores compressed data.
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base.
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.