35 #define VMD_HEADER_SIZE 0x0330
36 #define BYTES_PER_FRAME_RECORD 16
75 if (!w || w > 2048 || !h || h > 2048)
87 unsigned int toc_offset;
88 unsigned char *raw_frame_table;
89 int raw_frame_table_size;
90 int64_t current_offset;
92 unsigned int total_frames;
93 int64_t current_audio_pts = 0;
115 vst->codec->codec_tag = 0;
118 if(vmd->
is_indeo3 && vst->codec->width > 320){
119 vst->codec->width >>= 1;
120 vst->codec->height >>= 1;
157 av_reduce(&den, &num, den, num, (1UL<<31)-1);
167 raw_frame_table =
NULL;
175 raw_frame_table =
av_malloc(raw_frame_table_size);
181 if (
avio_read(pb, raw_frame_table, raw_frame_table_size) !=
182 raw_frame_table_size) {
190 current_offset =
AV_RL32(&raw_frame_table[6 * i + 2]);
200 if (size > INT_MAX / 2) {
205 if(!size && type != 1)
217 if(!current_audio_pts)
218 current_audio_pts += sound_buffers - 1;
231 current_offset +=
size;
void * av_malloc(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
void av_free_packet(AVPacket *pkt)
Free a packet.
int64_t pos
byte position in stream, -1 if unknown
int index
stream index in AVFormatContext
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
int64_t audio_sample_counter
#define AV_CH_LAYOUT_STEREO
unsigned int frames_per_block
int block_align
number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs...
unsigned int current_frame
static int vmd_read_close(AVFormatContext *s)
static av_cold int read_close(AVFormatContext *ctx)
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
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.
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
void av_log(void *avcl, int level, const char *fmt,...)
AVStream * avformat_new_stream(AVFormatContext *s, AVCodec *c)
Add a new stream to a media file.
uint64_t channel_layout
Audio channel layout.
AVCodecContext * codec
Codec context associated with this stream.
int av_reduce(int *dst_num, int *dst_den, int64_t num, int64_t den, int64_t max)
Reduce a fraction.
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.
#define FF_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
int bit_rate
the average bitrate
audio channel layout utility functions
AVInputFormat ff_vmd_demuxer
#define BYTES_PER_FRAME_RECORD
static int read_header(FFV1Context *f)
static int vmd_read_packet(AVFormatContext *s, AVPacket *pkt)
enum AVMediaType codec_type
int sample_rate
samples per second
AVIOContext * pb
I/O context.
static int vmd_read_header(AVFormatContext *s)
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
static int read_packet(AVFormatContext *ctx, AVPacket *pkt)
This structure contains the data a format has to probe a file.
unsigned char vmd_header[VMD_HEADER_SIZE]
unsigned char frame_record[BYTES_PER_FRAME_RECORD]
int channels
number of audio channels
void * priv_data
Format private data.
static int vmd_probe(AVProbeData *p)
#define AV_CH_LAYOUT_MONO
This structure stores compressed data.
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...