36 #define RoQ_MAGIC_NUMBER 0x1084 37 #define RoQ_CHUNK_PREAMBLE_SIZE 8 38 #define RoQ_AUDIO_SAMPLE_RATE 22050 39 #define RoQ_CHUNKS_TO_SCAN 30 41 #define RoQ_INFO 0x1001 42 #define RoQ_QUAD_CODEBOOK 0x1002 43 #define RoQ_QUAD_VQ 0x1011 44 #define RoQ_SOUND_MONO 0x1020 45 #define RoQ_SOUND_STEREO 0x1021 100 unsigned int chunk_size;
101 unsigned int chunk_type;
102 unsigned int codebook_size;
105 int64_t codebook_offset;
107 while (!packet_read) {
117 chunk_type =
AV_RL16(&preamble[0]);
118 chunk_size =
AV_RL32(&preamble[2]);
119 if(chunk_size > INT_MAX)
124 switch (chunk_type) {
152 codebook_size = chunk_size;
160 if (chunk_size > INT_MAX)
164 avio_seek(pb, codebook_offset, SEEK_SET);
168 if (ret != chunk_size)
226 if (ret != chunk_size) {
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
unsigned int audio_frame_count
int64_t pos
byte position in stream, -1 if unknown
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
int index
stream index in AVFormatContext
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.
#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_RL16
int ffio_limit(AVIOContext *s, int size)
static int roq_read_packet(AVFormatContext *s, AVPacket *pkt)
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media 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.
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
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.
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
int block_align
Audio only.
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.
#define RoQ_CHUNK_PREAMBLE_SIZE
static int roq_probe(const AVProbeData *p)
#define RoQ_AUDIO_SAMPLE_RATE
This structure contains the data a format has to probe a file.
int sample_rate
Audio only.
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.
#define RoQ_QUAD_CODEBOOK
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
AVInputFormat ff_roq_demuxer
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
This structure stores compressed data.
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
static int roq_read_header(AVFormatContext *s)