43
static const uint8_t fallback_lquant[] = {
44
16, 11, 10, 16, 24, 40, 51, 61,
45
12, 12, 14, 19, 26, 58, 60, 55,
46
14, 13, 16, 24, 40, 57, 69, 56,
47
14, 17, 22, 29, 51, 87, 80, 62,
48
18, 22, 37, 56, 68, 109, 103, 77,
49
24, 35, 55, 64, 81, 104, 113, 92,
50
49, 64, 78, 87, 103, 121, 120, 101,
51
72, 92, 95, 98, 112, 100, 103, 99
54
static const uint8_t fallback_cquant[] = {
55
17, 18, 24, 47, 99, 99, 99, 99,
56
18, 21, 26, 66, 99, 99, 99, 99,
57
24, 26, 56, 99, 99, 99, 99, 99,
58
47, 66, 99, 99, 99, 99, 99, 99,
59
99, 99, 99, 99, 99, 99, 99, 99,
60
99, 99, 99, 99, 99, 99, 99, 99,
61
99, 99, 99, 99, 99, 99, 99, 99,
62
99, 99, 99, 99, 99, 99, 99, 99
43
66
* \brief copy frame data from buffer to AVFrame, handling stride.
44
67
* \param f destination AVFrame
46
69
* \param width width of the video frame
47
70
* \param height height of the video frame
49
static void copy_frame(AVFrame *f, uint8_t *src,
72
static void copy_frame(AVFrame *f, const uint8_t *src,
50
73
int width, int height) {
52
75
avpicture_fill(&pic, src, PIX_FMT_YUV420P, width, height);
53
img_copy((AVPicture *)f, &pic, PIX_FMT_YUV420P, width, height);
76
av_picture_copy((AVPicture *)f, &pic, PIX_FMT_YUV420P, width, height);
57
80
* \brief extract quantization tables from codec data into our context
59
82
static int get_quant(AVCodecContext *avctx, NuvContext *c,
60
uint8_t *buf, int size) {
83
const uint8_t *buf, int size) {
62
85
if (size < 2 * 64 * 4) {
63
86
av_log(avctx, AV_LOG_ERROR, "insufficient rtjpeg quant data\n");
97
* \brief set quantization tables from a quality value
99
static void get_quant_quality(NuvContext *c, int quality) {
101
quality = FFMAX(quality, 1);
102
for (i = 0; i < 64; i++) {
103
c->lq[i] = (fallback_lquant[i] << 7) / quality;
104
c->cq[i] = (fallback_cquant[i] << 7) / quality;
108
static int codec_reinit(AVCodecContext *avctx, int width, int height, int quality) {
109
NuvContext *c = avctx->priv_data;
110
width = (width + 1) & ~1;
111
height = (height + 1) & ~1;
113
get_quant_quality(c, quality);
114
if (width != c->width || height != c->height) {
115
if (avcodec_check_dimensions(avctx, height, width) < 0)
117
avctx->width = c->width = width;
118
avctx->height = c->height = height;
119
c->decomp_size = c->height * c->width * 3 / 2;
120
c->decomp_buf = av_realloc(c->decomp_buf, c->decomp_size + LZO_OUTPUT_PADDING);
121
if (!c->decomp_buf) {
122
av_log(avctx, AV_LOG_ERROR, "Can't allocate decompression buffer.\n");
125
rtjpeg_decode_init(&c->rtj, &c->dsp, c->width, c->height, c->lq, c->cq);
126
} else if (quality != c->quality)
127
rtjpeg_decode_init(&c->rtj, &c->dsp, c->width, c->height, c->lq, c->cq);
73
131
static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
74
uint8_t *buf, int buf_size) {
75
NuvContext *c = (NuvContext *)avctx->priv_data;
132
const uint8_t *buf, int buf_size) {
133
NuvContext *c = avctx->priv_data;
76
134
AVFrame *picture = data;
77
135
int orig_size = buf_size;
78
136
enum {NUV_UNCOMPRESSED = '0', NUV_RTJPEG = '1',
115
163
// skip rest of the frameheader.
166
if (comptype == NUV_RTJPEG_IN_LZO || comptype == NUV_LZO) {
167
int outlen = c->decomp_size, inlen = buf_size;
168
if (lzo1x_decode(c->decomp_buf, &outlen, buf, &inlen))
169
av_log(avctx, AV_LOG_ERROR, "error during lzo decompression\n");
171
buf_size = c->decomp_size;
173
if (c->codec_frameheader) {
176
av_log(avctx, AV_LOG_ERROR, "invalid nuv video frame\n");
179
w = AV_RL16(&buf[6]);
180
h = AV_RL16(&buf[8]);
182
if (!codec_reinit(avctx, w, h, q))
189
avctx->release_buffer(avctx, &c->pic);
190
c->pic.reference = 1;
191
c->pic.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_READABLE |
192
FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
193
if (avctx->get_buffer(avctx, &c->pic) < 0) {
194
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
119
198
c->pic.pict_type = FF_I_TYPE;
120
199
c->pic.key_frame = 1;
121
200
// decompress/copy/whatever data
122
201
switch (comptype) {
123
203
case NUV_UNCOMPRESSED: {
124
204
int height = c->height;
125
205
if (buf_size < c->width * height * 3 / 2) {
129
209
copy_frame(&c->pic, buf, c->width, height);
212
case NUV_RTJPEG_IN_LZO:
132
213
case NUV_RTJPEG: {
133
214
rtjpeg_decode_frame_yuv420(&c->rtj, &c->pic, buf, buf_size);
136
case NUV_RTJPEG_IN_LZO: {
137
int outlen = c->decomp_size, inlen = buf_size;
138
if (lzo1x_decode(c->decomp_buf, &outlen, buf, &inlen))
139
av_log(avctx, AV_LOG_ERROR, "error during lzo decompression\n");
140
rtjpeg_decode_frame_yuv420(&c->rtj, &c->pic, c->decomp_buf, c->decomp_size);
144
int outlen = c->decomp_size, inlen = buf_size;
145
if (lzo1x_decode(c->decomp_buf, &outlen, buf, &inlen))
146
av_log(avctx, AV_LOG_ERROR, "error during lzo decompression\n");
147
copy_frame(&c->pic, c->decomp_buf, c->width, c->height);
150
217
case NUV_BLACK: {
151
218
memset(c->pic.data[0], 0, c->width * c->height);
152
219
memset(c->pic.data[1], 128, c->width * c->height / 4);
169
236
return orig_size;
172
static int decode_init(AVCodecContext *avctx) {
173
NuvContext *c = (NuvContext *)avctx->priv_data;
174
avctx->width = (avctx->width + 1) & ~1;
175
avctx->height = (avctx->height + 1) & ~1;
176
if (avcodec_check_dimensions(avctx, avctx->height, avctx->width) < 0) {
179
avctx->has_b_frames = 0;
239
static av_cold int decode_init(AVCodecContext *avctx) {
240
NuvContext *c = avctx->priv_data;
180
241
avctx->pix_fmt = PIX_FMT_YUV420P;
181
242
c->pic.data[0] = NULL;
182
c->width = avctx->width;
183
c->height = avctx->height;
184
c->decomp_size = c->height * c->width * 3 / 2;
185
c->decomp_buf = av_malloc(c->decomp_size + LZO_OUTPUT_PADDING);
186
if (!c->decomp_buf) {
187
av_log(avctx, AV_LOG_ERROR, "Can't allocate decompression buffer.\n");
190
dsputil_init(&c->dsp, avctx);
243
c->decomp_buf = NULL;
247
c->codec_frameheader = avctx->codec_tag == MKTAG('R', 'J', 'P', 'G');
191
248
if (avctx->extradata_size)
192
249
get_quant(avctx, c, avctx->extradata, avctx->extradata_size);
193
rtjpeg_decode_init(&c->rtj, &c->dsp, c->width, c->height, c->lq, c->cq);
250
dsputil_init(&c->dsp, avctx);
251
if (!codec_reinit(avctx, avctx->width, avctx->height, -1))
197
static int decode_end(AVCodecContext *avctx) {
198
NuvContext *c = (NuvContext *)avctx->priv_data;
256
static av_cold int decode_end(AVCodecContext *avctx) {
257
NuvContext *c = avctx->priv_data;
199
258
av_freep(&c->decomp_buf);
200
259
if (c->pic.data[0])
201
260
avctx->release_buffer(avctx, &c->pic);