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))
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;
239 for(
i=0;
i<
s->nb_streams;
i++){
288 for(
i=0;
i <
s->nb_streams;
i++){
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
unsigned int avio_rl16(AVIOContext *s)
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
unsigned int avio_rl32(AVIOContext *s)
unsigned int avio_rb32(AVIOContext *s)
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
#define flags(name, subs,...)
static int read_header(FFV1Context *f)
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
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.
int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags)
Get the index for a specific timestamp.
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
#define AVERROR_EOF
End of file.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
static const char signature[]
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
int extradata_size
Size of the extradata content in bytes.
int bits_per_coded_sample
The number of bits per sample in the codedwords.
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
enum AVMediaType codec_type
General type of the encoded data.
int block_align
Audio only.
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
int sample_rate
Audio only.
int64_t timestamp
Timestamp in AVStream.time_base units, preferably the time from which on correctly decoded frames are...
This structure stores compressed data.
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
This structure contains the data a format has to probe a file.
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
AVCodecParameters * codecpar
Codec parameters associated with this stream.
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
unsigned int index_pos[2]
indexes in the sample tables