29 #define CDXL_HEADER_SIZE 32 63 if (p->
buf[18] || !p->
buf[19])
92 "Could not parse framerate: %s.\n", cdxl->
framerate);
111 uint32_t current_size, video_size, image_size;
123 if (cdxl->
header[0] != 1) {
128 format = cdxl->
header[1] & 0xE0;
134 if (cdxl->
header[19] == 0 ||
135 FFALIGN(width, 16) * (uint64_t)height * cdxl->
header[19] > INT_MAX)
138 image_size = width * height * cdxl->
header[19] / 8;
140 image_size =
FFALIGN(width, 16) * height * cdxl->
header[19] / 8;
141 video_size = palette_size + image_size;
143 if (palette_size > 512)
157 if (cdxl->
header[1] & 0x10) {
189 if (audio_size + video_size && cdxl->
filesize > 0) {
190 frames = cdxl->
filesize / (audio_size + video_size);
195 st->
duration = frames * (int64_t)audio_size;
225 #define OFFSET(x) offsetof(CDXLDemuxContext, x) 246 .extensions =
"cdxl,xl",
248 .priv_class = &cdxl_demuxer_class,
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
int64_t avio_size(AVIOContext *s)
Get the filesize.
int av_parse_video_rate(AVRational *rate, const char *arg)
Parse str and store the detected values in *rate.
#define LIBAVUTIL_VERSION_INT
int64_t pos
byte position in stream, -1 if unknown
void av_shrink_packet(AVPacket *pkt, int size)
Reduce packet size, correctly zeroing padding.
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
int index
stream index in AVFormatContext
const char * av_default_item_name(void *ptr)
Return the context name.
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
#define AV_CH_LAYOUT_STEREO
int ctx_flags
Flags signalling stream properties.
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_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_RB16
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 format(the sample packing is implied by the sample format) and sample rate.The lists are not just lists
if it could not because there are no more frames
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
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.
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
uint64_t channel_layout
Audio only.
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
#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.
int flags
A combination of AV_PKT_FLAG values.
int buf_size
Size of buf except extra allocated bytes.
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
uint8_t header[CDXL_HEADER_SIZE]
audio channel layout utility functions
static int read_header(FFV1Context *f)
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
AVIOContext * pb
I/O context.
Describe the class of an AVClass context structure.
Rational number (pair of numerator and denominator).
#define AV_OPT_FLAG_DECODING_PARAM
a generic parameter which can be set by the user for demuxing or decoding
This structure contains the data a format has to probe a file.
#define flags(name, subs,...)
int64_t duration
Decoding: duration of the stream, in stream time base.
int sample_rate
Audio only.
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base...
void * priv_data
Format private data.
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).
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 AV_CH_LAYOUT_MONO
This structure stores compressed data.