51 uint32_t magic, nframes,
size, subversion,
i;
52 uint32_t
width = 0,
height = 0, got_audio = 0, read = 0;
59 if (magic ==
MKBETAG(
'A',
'N',
'I',
'M')) {
64 if (size < 3 * 256 + 6)
75 for (i = 0; i < 256; i++)
79 }
else if (magic ==
MKBETAG(
'S',
'A',
'N',
'M')) {
103 while (!got_audio && ((read + 8) < size)) {
104 uint32_t sig, chunk_size;
113 case MKBETAG(
'W',
'a',
'v',
'e'):
126 case MKBETAG(
'B',
'l',
'1',
'6'):
127 case MKBETAG(
'A',
'N',
'N',
'O'):
165 for (i = 0; i < 256; i++)
206 case MKBETAG(
'F',
'R',
'M',
'E'):
215 case MKBETAG(
'B',
'l',
'1',
'6'):
223 case MKBETAG(
'W',
'a',
'v',
'e'):
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
static int smush_read_packet(AVFormatContext *ctx, AVPacket *pkt)
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
int index
stream index in AVFormatContext
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
AVInputFormat ff_smush_demuxer
unsigned int avio_rb32(AVIOContext *s)
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
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
#define AVERROR_EOF
End of file.
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
unsigned int avio_rl32(AVIOContext *s)
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
enum AVMediaType codec_type
General type of the encoded data.
AVRational avg_frame_rate
Average framerate.
int flags
A combination of AV_PKT_FLAG values.
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
unsigned int avio_rb24(AVIOContext *s)
static int smush_read_probe(const AVProbeData *p)
static int read_header(FFV1Context *f)
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
AVIOContext * pb
I/O context.
static int smush_read_header(AVFormatContext *ctx)
This structure contains the data a format has to probe a file.
int64_t duration
Decoding: duration of the stream, in stream time base.
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
int sample_rate
Audio only.
unsigned int avio_rl16(AVIOContext *s)
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base...
int64_t nb_frames
number of frames in this stream if known or 0
#define MKBETAG(a, b, c, d)
void * priv_data
Format private data.
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
AVCodecParameters * codecpar
Codec parameters associated with this stream.
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
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
#define MKTAG(a, b, c, d)
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
This structure stores compressed data.