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
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++) {
132 if (buf_size > INT_MAX/8)
140 if (!
c->decomp_buf) {
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') {
194 if (buf_size < 12 || buf[0] !=
'V') {
200 case NUV_RTJPEG_IN_LZO:
203 if (
c->width < 16 ||
c->height < 16) {
216 case NUV_UNCOMPRESSED:
217 minsize =
c->width *
c->height * 3 / 2;
220 minsize =
c->width/16 * (
c->height/16) * 6;
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;
248 if (
c->codec_frameheader) {
257 if (buf[0] !=
'V' &&
AV_RL16(&buf[4]) != 0x000c) {
268 buf_size = avpkt->
size;
276 if (size_change || keyframe) {
284 memset(
c->pic->data[0], 0, avctx->
height *
c->pic->linesize[0]);
285 memset(
c->pic->data[1], 0x80, avctx->
height *
c->pic->linesize[1] / 2);
286 memset(
c->pic->data[2], 0x80, avctx->
height *
c->pic->linesize[2] / 2);
290 c->pic->key_frame = keyframe;
294 case NUV_UNCOMPRESSED: {
298 height = buf_size /
c->width / 3 * 2;
304 case NUV_RTJPEG_IN_LZO:
311 memset(
c->pic->data[0], 0,
c->width *
c->height);
312 memset(
c->pic->data[1], 128,
c->width *
c->height / 4);
313 memset(
c->pic->data[2], 128,
c->width *
c->height / 4);
337 c->decomp_buf =
NULL;
Libavcodec external API header.
static av_cold int init(AVCodecContext *avctx)
#define flags(name, subs,...)
common internal and external API header
#define MKTAG(a, b, c, d)
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.
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding.
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
int av_lzo1x_decode(void *out, int *outlen, const void *in, int *inlen)
Decodes LZO 1x compressed data.
#define AV_LZO_OUTPUT_PADDING
void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)
Allocate a buffer, reusing the given one if large enough.
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.
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.
@ AV_PICTURE_TYPE_I
Intra.
@ AV_PICTURE_TYPE_P
Predicted.
static void init_frame(FlacEncodeContext *s, int nb_samples)
#define FF_REGET_BUFFER_FLAG_READONLY
the returned buffer does not need to be writable
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
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 void get_quant_quality(NuvContext *c, int quality)
set quantization tables from a quality value
static const uint8_t fallback_cquant[]
static void copy_frame(AVFrame *f, const uint8_t *src, int width, int height)
copy frame data from buffer to AVFrame, handling stride.
static av_cold int decode_init(AVCodecContext *avctx)
static const uint8_t fallback_lquant[]
static av_cold int decode_end(AVCodecContext *avctx)
static int get_quant(AVCodecContext *avctx, NuvContext *c, const uint8_t *buf, int size)
extract quantization tables from codec data into our context
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
static int codec_reinit(AVCodecContext *avctx, int width, int height, int quality)
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
void ff_rtjpeg_init(RTJpegContext *c, AVCodecContext *avctx)
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 ff_rtjpeg_decode_frame_yuv420(RTJpegContext *c, AVFrame *f, const uint8_t *buf, int buf_size)
decode one rtjpeg YUV420 frame
#define RTJPEG_HEADER_SIZE
main external API structure.
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
int width
picture width / height.
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
int frame_number
Frame counter, set by libavcodec.
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
const char * name
Name of the codec implementation.
This structure describes decoded (raw) audio or video data.
This structure stores compressed data.
unsigned char * decomp_buf