48 16, 11, 10, 16, 24, 40, 51, 61,
49 12, 12, 14, 19, 26, 58, 60, 55,
50 14, 13, 16, 24, 40, 57, 69, 56,
51 14, 17, 22, 29, 51, 87, 80, 62,
52 18, 22, 37, 56, 68, 109, 103, 77,
53 24, 35, 55, 64, 81, 104, 113, 92,
54 49, 64, 78, 87, 103, 121, 120, 101,
55 72, 92, 95, 98, 112, 100, 103, 99
59 17, 18, 24, 47, 99, 99, 99, 99,
60 18, 21, 26, 66, 99, 99, 99, 99,
61 24, 26, 56, 99, 99, 99, 99, 99,
62 47, 66, 99, 99, 99, 99, 99, 99,
63 99, 99, 99, 99, 99, 99, 99, 99,
64 99, 99, 99, 99, 99, 99, 99, 99,
65 99, 99, 99, 99, 99, 99, 99, 99,
66 99, 99, 99, 99, 99, 99, 99, 99
81 f->
format, width, height, 1);
93 if (size < 2 * 64 * 4) {
97 for (i = 0; i < 64; i++, buf += 4)
99 for (i = 0; i < 64; i++, buf += 4)
110 quality =
FFMAX(quality, 1);
111 for (i = 0; i < 64; i++) {
129 int64_t buf_size = height * (int64_t)width * 3 / 2
132 if (buf_size > INT_MAX/8)
142 "Can't allocate decompression buffer.\n");
148 }
else if (quality != c->
quality)
158 int buf_size = avpkt->
size;
161 int orig_size = buf_size;
168 NUV_UNCOMPRESSED =
'0',
170 NUV_RTJPEG_IN_LZO =
'2',
182 if (buf[0] ==
'D' && buf[1] ==
'R') {
187 ret =
get_quant(avctx, c, buf, buf_size);
194 if (buf_size < 12 || buf[0] !=
'V') {
200 case NUV_RTJPEG_IN_LZO:
216 case NUV_UNCOMPRESSED:
225 case NUV_RTJPEG_IN_LZO:
231 if (buf_size < minsize / 4)
237 if (comptype == NUV_RTJPEG_IN_LZO || comptype == NUV_LZO) {
239 int inlen = buf_size;
257 if (buf[0] !=
'V' &&
AV_RL16(&buf[4]) != 0x000c) {
268 buf_size = avpkt->
size;
276 if (size_change || keyframe) {
294 case NUV_UNCOMPRESSED: {
296 if (buf_size < c->
width * height * 3 / 2) {
298 height = buf_size / c->
width / 3 * 2;
304 case NUV_RTJPEG_IN_LZO:
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
static av_cold int decode_end(AVCodecContext *avctx)
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
This structure describes decoded (raw) audio or video data.
ptrdiff_t const GLvoid * data
int ff_set_dimensions(AVCodecContext *s, int width, int height)
Check that the provided frame dimensions are valid and set them on the codec context.
static av_cold int init(AVCodecContext *avctx)
int av_image_fill_arrays(uint8_t *dst_data[4], int dst_linesize[4], const uint8_t *src, enum AVPixelFormat pix_fmt, int width, int height, int align)
Setup the data pointers and linesizes based on the specified image parameters and the provided array...
static int get_quant(AVCodecContext *avctx, NuvContext *c, const uint8_t *buf, int size)
extract quantization tables from codec data into our context
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
static void get_quant_quality(NuvContext *c, int quality)
set quantization tables from a quality value
static const uint8_t fallback_lquant[]
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
int ff_rtjpeg_decode_frame_yuv420(RTJpegContext *c, AVFrame *f, const uint8_t *buf, int buf_size)
decode one rtjpeg YUV420 frame
void ff_rtjpeg_init(RTJpegContext *c, AVCodecContext *avctx)
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
#define AV_LZO_OUTPUT_PADDING
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
#define FF_REGET_BUFFER_FLAG_READONLY
the returned buffer does not need to be writable
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Identical in function to ff_get_buffer(), except it reuses the existing buffer if available...
const char * name
Name of the codec implementation.
void av_image_copy(uint8_t *dst_data[4], int dst_linesizes[4], const uint8_t *src_data[4], const int src_linesizes[4], enum AVPixelFormat pix_fmt, int width, int height)
Copy image in src_data to dst_data.
static av_cold int decode_init(AVCodecContext *avctx)
void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)
Allocate a buffer, reusing the given one if large enough.
unsigned char * decomp_buf
enum AVPictureType pict_type
Picture type of the frame.
int width
picture width / height.
void ff_rtjpeg_decode_init(RTJpegContext *c, int width, int height, const uint32_t *lquant, const uint32_t *cquant)
initialize an RTJpegContext, may be called multiple times
int av_lzo1x_decode(void *out, int *outlen, const void *in, int *inlen)
Decodes LZO 1x compressed data.
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
main external API structure.
static void copy_frame(AVFrame *f, const uint8_t *src, int width, int height)
copy frame data from buffer to AVFrame, handling stride.
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
#define flags(name, subs,...)
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
static const uint8_t fallback_cquant[]
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
common internal api header.
common internal and external API header
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
static int codec_reinit(AVCodecContext *avctx, int width, int height, int quality)
#define RTJPEG_HEADER_SIZE
int key_frame
1 -> keyframe, 0-> not
and forward the result(frame or status change) to the corresponding input.If nothing is possible
int frame_number
Frame counter, set by libavcodec.
static void init_frame(FlacEncodeContext *s, int nb_samples)
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
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 MKTAG(a, b, c, d)
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
This structure stores compressed data.
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.