42 #define EXTRADATA1_SIZE (6 + 256 * 3) 44 #define FORM_TAG MKBETAG('F', 'O', 'R', 'M') 45 #define RLV2_TAG MKBETAG('R', 'L', 'V', '2') 46 #define RLV3_TAG MKBETAG('R', 'L', 'V', '3') 80 unsigned int frame_count;
81 unsigned int audio_frame_counter = 0;
82 unsigned int video_frame_counter = 0;
83 unsigned int back_size;
84 unsigned short sound_rate;
87 unsigned short def_sound_size;
89 unsigned int pts_den = 11025;
90 unsigned int pts_num = 1103;
91 unsigned int* chunk_offset =
NULL;
92 int* chunk_size =
NULL;
93 int* audio_size =
NULL;
104 if(back_size > INT_MAX/2 || frame_count > INT_MAX /
sizeof(uint32_t))
127 if(signature ==
RLV3_TAG && back_size > 0)
136 if (!channels || channels > 42) {
141 pts_num = def_sound_size;
162 chunk_size =
av_malloc(frame_count *
sizeof(uint32_t));
163 audio_size =
av_malloc(frame_count *
sizeof(uint32_t));
164 chunk_offset =
av_malloc(frame_count *
sizeof(uint32_t));
166 if(!chunk_size || !audio_size || !chunk_offset){
174 for(i=0; i < frame_count;i++) {
181 for(i=0; i < frame_count;i++) {
188 for(i=0; i < frame_count;i++) {
197 for(i=0;i<frame_count;i++){
198 if(chunk_size[i] < 0 || audio_size[i] > chunk_size[i]){
203 if(sound_rate && audio_size[i]){
206 audio_frame_counter += audio_size[
i] /
channels;
210 ++video_frame_counter;
236 int64_t
pos = INT64_MAX;
258 if(ret != sample->
size){
#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.
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).
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
static const char signature[]
unsigned int avio_rb32(AVIOContext *s)
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.
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
#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.
unsigned int avio_rl32(AVIOContext *s)
int64_t timestamp
Timestamp in AVStream.time_base units, preferably the time from which on correctly decoded frames are...
#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 extradata_size
Size of the extradata content in bytes.
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.
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.
AVIOContext * pb
I/O context.
This structure contains the data a format has to probe a file.
#define flags(name, subs,...)
int sample_rate
Audio only.
unsigned int avio_rl16(AVIOContext *s)
unsigned int index_pos[2]
indexes in the sample tables
void * priv_data
Format private data.
int bits_per_coded_sample
The number of bits per sample in the codedwords.
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
This structure stores compressed data.
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...