35 #define FILM_TAG MKBETAG('F', 'I', 'L', 'M') 36 #define FDSC_TAG MKBETAG('F', 'D', 'S', 'C') 37 #define STAB_TAG MKBETAG('S', 'T', 'A', 'B') 38 #define CVID_TAG MKBETAG('c', 'v', 'i', 'd') 39 #define RAW_TAG MKBETAG('r', 'a', 'w', ' ') 92 unsigned char scratch[256];
94 unsigned int data_offset;
95 unsigned int audio_frame_counter;
96 unsigned int video_frame_counter;
103 data_offset =
AV_RB32(&scratch[4]);
163 if (scratch[20] == 24) {
218 audio_frame_counter = video_frame_counter = 0;
226 data_offset +
AV_RB32(&scratch[0]);
232 if (
AV_RB32(&scratch[8]) == 0xFFFFFFFF) {
246 video_frame_counter++;
288 while (next_sample ==
NULL) {
310 if (next_sample !=
NULL)
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp, int size, int distance, int flags)
Add an index entry into a sorted list.
packed RGB 8:8:8, 24bpp, RGBRGB...
static int film_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
int index
stream index in AVFormatContext
unsigned int sample_count
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
static int film_read_close(AVFormatContext *s)
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
unsigned int audio_channels
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
enum AVStreamParseType need_parsing
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
AVStream ** streams
A list of all streams in the file.
#define AVERROR_EOF
End of file.
static av_cold int read_close(AVFormatContext *ctx)
unsigned int audio_samplerate
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
AVCodecID
Identify the syntax and semantics of the bitstream.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags)
Get the index for a specific timestamp.
#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.
unsigned int current_sample
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.
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
int block_align
Audio only.
film_sample * sample_table
enum AVCodecID video_type
static int film_read_header(AVFormatContext *s)
static int read_header(FFV1Context *f)
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
AVStreamInternal * internal
An opaque field for libavformat internal usage.
static int film_probe(const AVProbeData *p)
AVIOContext * pb
I/O context.
This structure contains the data a format has to probe a file.
AVInputFormat ff_segafilm_demuxer
#define flags(name, subs,...)
int64_t duration
Decoding: duration of the stream, in stream time base.
int sample_rate
Audio only.
static int film_read_packet(AVFormatContext *s, AVPacket *pkt)
void * priv_data
Format private data.
int bits_per_coded_sample
The number of bits per sample in the codedwords.
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
enum AVCodecID audio_type
AVCodecParameters * codecpar
Codec parameters associated with this stream.
#define av_malloc_array(a, b)
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
This structure stores compressed data.
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...