25 #include "libavutil/bswap.h"
26 #include "libavutil/common.h"
27 #include "libavutil/intreadwrite.h"
28 #include "libavutil/lzo.h"
29 #include "libavutil/imgutils.h"
42 uint32_t lq[64], cq[64];
47 16, 11, 10, 16, 24, 40, 51, 61,
48 12, 12, 14, 19, 26, 58, 60, 55,
49 14, 13, 16, 24, 40, 57, 69, 56,
50 14, 17, 22, 29, 51, 87, 80, 62,
51 18, 22, 37, 56, 68, 109, 103, 77,
52 24, 35, 55, 64, 81, 104, 113, 92,
53 49, 64, 78, 87, 103, 121, 120, 101,
54 72, 92, 95, 98, 112, 100, 103, 99
58 17, 18, 24, 47, 99, 99, 99, 99,
59 18, 21, 26, 66, 99, 99, 99, 99,
60 24, 26, 56, 99, 99, 99, 99, 99,
61 47, 66, 99, 99, 99, 99, 99, 99,
62 99, 99, 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
89 if (size < 2 * 64 * 4) {
93 for (i = 0; i < 64; i++, buf += 4)
95 for (i = 0; i < 64; i++, buf += 4)
106 quality =
FFMAX(quality, 1);
107 for (i = 0; i < 64; i++) {
135 "Can't allocate decompression buffer.\n");
141 }
else if (quality != c->
quality)
151 int buf_size = avpkt->
size;
154 int orig_size = buf_size;
158 NUV_UNCOMPRESSED =
'0',
160 NUV_RTJPEG_IN_LZO =
'2',
172 if (buf[0] ==
'D' && buf[1] ==
'R') {
177 ret =
get_quant(avctx, c, buf, buf_size);
184 if (buf[0] !=
'V' || buf_size < 12) {
190 case NUV_RTJPEG_IN_LZO:
204 if (comptype == NUV_RTJPEG_IN_LZO || comptype == NUV_LZO) {
206 int inlen = buf_size;
226 if (comptype == NUV_RTJPEG_IN_LZO || comptype == NUV_LZO)
253 case NUV_UNCOMPRESSED: {
255 if (buf_size < c->
width * height * 3 / 2) {
257 height = buf_size / c->
width / 3 * 2;
262 case NUV_RTJPEG_IN_LZO:
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.
int avpicture_fill(AVPicture *picture, uint8_t *ptr, enum AVPixelFormat pix_fmt, int width, int height)
Fill in the AVPicture fields.
#define RTJPEG_FILE_VERSION
static int get_quant(AVCodecContext *avctx, NuvContext *c, const uint8_t *buf, int size)
extract quantization tables from codec data into our context
void av_log(void *avcl, int level, const char *fmt,...) av_printf_format(3
Send the specified message to the log if the level is less than or equal to the current av_log_level...
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[]
four components are given, that's all.
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
void av_freep(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
void av_picture_copy(AVPicture *dst, const AVPicture *src, enum AVPixelFormat pix_fmt, int width, int height)
Copy image src to dst.
static int decode(MimicContext *ctx, int quality, int num_coeffs, int is_iframe)
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)
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
const char * name
Name of the codec implementation.
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
#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. ...
Libavcodec external API header.
static av_cold int decode_init(AVCodecContext *avctx)
#define FF_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
unsigned char * decomp_buf
int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
Check if the given dimension of an image is valid, meaning that all bytes of the image can be address...
int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame)
Identical in function to av_frame_make_writable(), except it uses ff_get_buffer() to allocate the 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.
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
main external API structure.
static void close(AVCodecParserContext *s)
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').
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
#define MKTAG(a, b, c, d)
static const uint8_t fallback_cquant[]
common internal api header.
static av_cold int init(AVCodecParserContext *s)
static int codec_reinit(AVCodecContext *avctx, int width, int height, int quality)
#define RTJPEG_HEADER_SIZE
void * av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
Reallocate the given block if it is not large enough, otherwise do nothing.
int key_frame
1 -> keyframe, 0-> not
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)
This structure stores compressed data.
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.