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36 p->
buf[6] >= 8 && p->
buf[6] <= 28)
45 for (
i = 0;
i < 120;
i += 2) {
46 unsigned sample = ((unsigned)
src[
i + 0] << 25) + ((unsigned)
src[
i + 1] << 18);
56 for (
i = 0;
i < 120;
i += 3) {
59 sample = ((unsigned)
src[
i + 0] << 25) | ((unsigned)
src[
i + 1] << 18) | ((unsigned)
src[
i + 2] << 11);
68 for (
i = 0;
i < 120;
i += 4) {
71 sample = ((unsigned)
src[
i + 0] << 25) | ((unsigned)
src[
i + 1] << 18) | ((unsigned)
src[
i + 2] << 11) | ((unsigned)
src[
i + 3] << 4);
76 #define SDS_3BYTE_TO_INT_DECODE(x) (((x) & 0x7F) | (((x) & 0x7F00) >> 1) | (((x) & 0x7F0000) >> 2))
81 unsigned sample_period;
93 if (
s->bit_depth < 8 ||
s->bit_depth > 28)
96 if (
s->bit_depth < 14) {
99 }
else if (
s->bit_depth < 21) {
143 s->read_block(
s->data, (uint32_t *)
pkt->
data);
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
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
enum AVMediaType codec_type
General type of the encoded data.
#define AVERROR_EOF
End of file.
static int sds_probe(const AVProbeData *p)
int64_t avio_size(AVIOContext *s)
Get the filesize.
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
int64_t duration
Decoding: duration of the stream, in stream time base.
AVInputFormat ff_sds_demuxer
#define AV_PKT_FLAG_CORRUPT
The packet content is corrupted.
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.
void(* read_block)(const uint8_t *src, uint32_t *dst)
AVCodecParameters * codecpar
Codec parameters associated with this stream.
static int read_header(FFV1Context *f)
static void byte3_read(const uint8_t *src, uint32_t *dst)
static void byte2_read(const uint8_t *src, uint32_t *dst)
AVIOContext * pb
I/O context.
This structure contains the data a format has to probe a file.
int sample_rate
Audio only.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
static void byte4_read(const uint8_t *src, uint32_t *dst)
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
int avio_r8(AVIOContext *s)
int flags
A combination of AV_PKT_FLAG values.
#define SDS_3BYTE_TO_INT_DECODE(x)
#define i(width, name, range_min, range_max)
unsigned int avio_rl24(AVIOContext *s)
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
unsigned int avio_rb16(AVIOContext *s)
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.
int64_t pos
byte position in stream, -1 if unknown
#define flags(name, subs,...)
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
static int sds_read_packet(AVFormatContext *ctx, AVPacket *pkt)
static int sds_read_header(AVFormatContext *ctx)
void * priv_data
Format private data.
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.