Statistics
| Branch: | Revision:

ffmpeg / libavcodec / libxavs.c @ 2912e87a

History | View | Annotate | Download (11.7 KB)

1
/*
2
 * AVS encoding using the xavs library
3
 * Copyright (C) 2010 Amanda, Y.N. Wu <amanda11192003@gmail.com>
4
 *
5
 * This file is part of Libav.
6
 *
7
 * Libav is free software; you can redistribute it and/or
8
 * modify it under the terms of the GNU Lesser General Public
9
 * License as published by the Free Software Foundation; either
10
 * version 2.1 of the License, or (at your option) any later version.
11
 *
12
 * Libav is distributed in the hope that it will be useful,
13
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 * Lesser General Public License for more details.
16
 *
17
 * You should have received a copy of the GNU Lesser General Public
18
 * License along with Libav; if not, write to the Free Software
19
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20
 */
21

    
22
#include <stdio.h>
23
#include <stdlib.h>
24
#include <string.h>
25
#include <math.h>
26
#include <stdint.h>
27
#include <xavs.h>
28
#include "avcodec.h"
29

    
30
#define END_OF_STREAM 0x001
31

    
32
#define XAVS_PART_I8X8 0x002 /* Analyze i8x8 (requires 8x8 transform) */
33
#define XAVS_PART_P8X8 0x010 /* Analyze p16x8, p8x16 and p8x8 */
34
#define XAVS_PART_B8X8 0x100 /* Analyze b16x8, b*/
35

    
36
typedef struct XavsContext {
37
    xavs_param_t    params;
38
    xavs_t         *enc;
39
    xavs_picture_t  pic;
40
    uint8_t        *sei;
41
    int             sei_size;
42
    AVFrame         out_pic;
43
    int             end_of_stream;
44
} XavsContext;
45

    
46
static void XAVS_log(void *p, int level, const char *fmt, va_list args)
47
{
48
    static const int level_map[] = {
49
        [XAVS_LOG_ERROR]   = AV_LOG_ERROR,
50
        [XAVS_LOG_WARNING] = AV_LOG_WARNING,
51
        [XAVS_LOG_INFO]    = AV_LOG_INFO,
52
        [XAVS_LOG_DEBUG]   = AV_LOG_DEBUG
53
    };
54

    
55
    if (level < 0 || level > XAVS_LOG_DEBUG)
56
        return;
57

    
58
    av_vlog(p, level_map[level], fmt, args);
59
}
60

    
61
static int encode_nals(AVCodecContext *ctx, uint8_t *buf,
62
                       int size, xavs_nal_t *nals,
63
                       int nnal, int skip_sei)
64
{
65
    XavsContext *x4 = ctx->priv_data;
66
    uint8_t *p = buf;
67
    int i, s;
68

    
69
    /* Write the SEI as part of the first frame. */
70
    if (x4->sei_size > 0 && nnal > 0) {
71
        memcpy(p, x4->sei, x4->sei_size);
72
        p += x4->sei_size;
73
        x4->sei_size = 0;
74
    }
75

    
76
    for (i = 0; i < nnal; i++) {
77
        /* Don't put the SEI in extradata. */
78
        if (skip_sei && nals[i].i_type == NAL_SEI) {
79
            x4->sei = av_malloc( 5 + nals[i].i_payload * 4 / 3 );
80
            if (xavs_nal_encode(x4->sei, &x4->sei_size, 1, nals + i) < 0)
81
                return -1;
82

    
83
            continue;
84
        }
85
        s = xavs_nal_encode(p, &size, 1, nals + i);
86
        if (s < 0)
87
            return -1;
88
        p += s;
89
    }
90

    
91
    return p - buf;
92
}
93

    
94
static int XAVS_frame(AVCodecContext *ctx, uint8_t *buf,
95
                      int bufsize, void *data)
96
{
97
    XavsContext *x4 = ctx->priv_data;
98
    AVFrame *frame = data;
99
    xavs_nal_t *nal;
100
    int nnal, i;
101
    xavs_picture_t pic_out;
102

    
103
    x4->pic.img.i_csp   = XAVS_CSP_I420;
104
    x4->pic.img.i_plane = 3;
105

    
106
    if (frame) {
107
       for (i = 0; i < 3; i++) {
108
            x4->pic.img.plane[i] = frame->data[i];
109
            x4->pic.img.i_stride[i] = frame->linesize[i];
110
       }
111

    
112
        x4->pic.i_pts  = frame->pts;
113
        x4->pic.i_type = XAVS_TYPE_AUTO;
114
    }
115

    
116
    if (xavs_encoder_encode(x4->enc, &nal, &nnal,
117
                            frame? &x4->pic: NULL, &pic_out) < 0)
118
    return -1;
119

    
120
    bufsize = encode_nals(ctx, buf, bufsize, nal, nnal, 0);
121

    
122
    if (bufsize < 0)
123
        return -1;
124

    
125
    if (!bufsize && !frame && !(x4->end_of_stream)){
126
        buf[bufsize]   = 0x0;
127
        buf[bufsize+1] = 0x0;
128
        buf[bufsize+2] = 0x01;
129
        buf[bufsize+3] = 0xb1;
130
        bufsize += 4;
131
        x4->end_of_stream = END_OF_STREAM;
132
        return bufsize;
133
    }
134
    /* FIXME: libxavs now provides DTS */
135
    /* but AVFrame doesn't have a field for it. */
136
    x4->out_pic.pts = pic_out.i_pts;
137

    
138
    switch (pic_out.i_type) {
139
    case XAVS_TYPE_IDR:
140
    case XAVS_TYPE_I:
141
        x4->out_pic.pict_type = FF_I_TYPE;
142
        break;
143
    case XAVS_TYPE_P:
144
        x4->out_pic.pict_type = FF_P_TYPE;
145
        break;
146
    case XAVS_TYPE_B:
147
    case XAVS_TYPE_BREF:
148
        x4->out_pic.pict_type = FF_B_TYPE;
149
        break;
150
    }
151

    
152
    /* There is no IDR frame in AVS JiZhun */
153
    /* Sequence header is used as a flag */
154
    x4->out_pic.key_frame = pic_out.i_type == XAVS_TYPE_I;
155

    
156
    x4->out_pic.quality   = (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA;
157

    
158
    return bufsize;
159
}
160

    
161
static av_cold int XAVS_close(AVCodecContext *avctx)
162
{
163
    XavsContext *x4 = avctx->priv_data;
164

    
165
    av_freep(&avctx->extradata);
166
    av_free(x4->sei);
167

    
168
    if (x4->enc)
169
        xavs_encoder_close(x4->enc);
170

    
171
    return 0;
172
}
173

    
174
static av_cold int XAVS_init(AVCodecContext *avctx)
175
{
176
    XavsContext *x4 = avctx->priv_data;
177

    
178
    x4->sei_size = 0;
179
    xavs_param_default(&x4->params);
180

    
181
    x4->params.pf_log               = XAVS_log;
182
    x4->params.p_log_private        = avctx;
183
    x4->params.i_keyint_max         = avctx->gop_size;
184
    x4->params.rc.i_bitrate         = avctx->bit_rate       / 1000;
185
    x4->params.rc.i_vbv_buffer_size = avctx->rc_buffer_size / 1000;
186
    x4->params.rc.i_vbv_max_bitrate = avctx->rc_max_rate    / 1000;
187
    x4->params.rc.b_stat_write      = avctx->flags & CODEC_FLAG_PASS1;
188
    if (avctx->flags & CODEC_FLAG_PASS2) {
189
        x4->params.rc.b_stat_read = 1;
190
    } else {
191
        if (avctx->crf) {
192
            x4->params.rc.i_rc_method   = XAVS_RC_CRF;
193
            x4->params.rc.f_rf_constant = avctx->crf;
194
        } else if (avctx->cqp > -1) {
195
            x4->params.rc.i_rc_method   = XAVS_RC_CQP;
196
            x4->params.rc.i_qp_constant = avctx->cqp;
197
        }
198
    }
199

    
200
    /* if neither crf nor cqp modes are selected we have to enable the RC */
201
    /* we do it this way because we cannot check if the bitrate has been set */
202
    if (!(avctx->crf || (avctx->cqp > -1)))
203
        x4->params.rc.i_rc_method = XAVS_RC_ABR;
204

    
205
    x4->params.i_bframe          = avctx->max_b_frames;
206
    /* cabac is not included in AVS JiZhun Profile */
207
    x4->params.b_cabac           = 0;
208

    
209
    x4->params.i_bframe_adaptive = avctx->b_frame_strategy;
210
    x4->params.i_bframe_bias     = avctx->bframebias;
211

    
212
    avctx->has_b_frames          = !!avctx->max_b_frames;
213

    
214
    /* AVS doesn't allow B picture as reference */
215
    /* The max allowed reference frame number of B is 2 */
216
    x4->params.i_keyint_min      = avctx->keyint_min;
217
    if (x4->params.i_keyint_min > x4->params.i_keyint_max)
218
        x4->params.i_keyint_min = x4->params.i_keyint_max;
219

    
220
    x4->params.i_scenecut_threshold        = avctx->scenechange_threshold;
221

    
222
   // x4->params.b_deblocking_filter       = avctx->flags & CODEC_FLAG_LOOP_FILTER;
223
    x4->params.i_deblocking_filter_alphac0 = avctx->deblockalpha;
224
    x4->params.i_deblocking_filter_beta    = avctx->deblockbeta;
225

    
226
    x4->params.rc.i_qp_min                 = avctx->qmin;
227
    x4->params.rc.i_qp_max                 = avctx->qmax;
228
    x4->params.rc.i_qp_step                = avctx->max_qdiff;
229

    
230
    x4->params.rc.f_qcompress       = avctx->qcompress; /* 0.0 => cbr, 1.0 => constant qp */
231
    x4->params.rc.f_qblur           = avctx->qblur;     /* temporally blur quants */
232
    x4->params.rc.f_complexity_blur = avctx->complexityblur;
233

    
234
    x4->params.i_frame_reference    = avctx->refs;
235

    
236
    x4->params.i_width              = avctx->width;
237
    x4->params.i_height             = avctx->height;
238
    x4->params.vui.i_sar_width      = avctx->sample_aspect_ratio.num;
239
    x4->params.vui.i_sar_height     = avctx->sample_aspect_ratio.den;
240
    /* This is only used for counting the fps */
241
    x4->params.i_fps_num            = avctx->time_base.den;
242
    x4->params.i_fps_den            = avctx->time_base.num;
243
    x4->params.analyse.inter        = XAVS_ANALYSE_I8x8 |XAVS_ANALYSE_PSUB16x16| XAVS_ANALYSE_BSUB16x16;
244
    if (avctx->partitions) {
245
        if (avctx->partitions & XAVS_PART_I8X8)
246
            x4->params.analyse.inter |= XAVS_ANALYSE_I8x8;
247

    
248
        if (avctx->partitions & XAVS_PART_P8X8)
249
            x4->params.analyse.inter |= XAVS_ANALYSE_PSUB16x16;
250

    
251
        if (avctx->partitions & XAVS_PART_B8X8)
252
            x4->params.analyse.inter |= XAVS_ANALYSE_BSUB16x16;
253
    }
254

    
255
    x4->params.analyse.i_direct_mv_pred  = avctx->directpred;
256

    
257
    x4->params.analyse.b_weighted_bipred = avctx->flags2 & CODEC_FLAG2_WPRED;
258

    
259
    switch (avctx->me_method) {
260
         case  ME_EPZS:
261
               x4->params.analyse.i_me_method = XAVS_ME_DIA;
262
               break;
263
         case  ME_HEX:
264
               x4->params.analyse.i_me_method = XAVS_ME_HEX;
265
               break;
266
         case  ME_UMH:
267
               x4->params.analyse.i_me_method = XAVS_ME_UMH;
268
               break;
269
         case  ME_FULL:
270
               x4->params.analyse.i_me_method = XAVS_ME_ESA;
271
               break;
272
         case  ME_TESA:
273
               x4->params.analyse.i_me_method = XAVS_ME_TESA;
274
               break;
275
         default:
276
               x4->params.analyse.i_me_method = XAVS_ME_HEX;
277
    }
278

    
279
    x4->params.analyse.i_me_range = avctx->me_range;
280
    x4->params.analyse.i_subpel_refine    = avctx->me_subpel_quality;
281

    
282
    x4->params.analyse.b_mixed_references = avctx->flags2 & CODEC_FLAG2_MIXED_REFS;
283
    x4->params.analyse.b_chroma_me        = avctx->me_cmp & FF_CMP_CHROMA;
284
    /* AVS P2 only enables 8x8 transform */
285
    x4->params.analyse.b_transform_8x8    = 1; //avctx->flags2 & CODEC_FLAG2_8X8DCT;
286
    x4->params.analyse.b_fast_pskip       = avctx->flags2 & CODEC_FLAG2_FASTPSKIP;
287

    
288
    x4->params.analyse.i_trellis          = avctx->trellis;
289
    x4->params.analyse.i_noise_reduction  = avctx->noise_reduction;
290

    
291
    if (avctx->level > 0)
292
        x4->params.i_level_idc = avctx->level;
293

    
294
    x4->params.rc.f_rate_tolerance =
295
        (float)avctx->bit_rate_tolerance/avctx->bit_rate;
296

    
297
    if ((avctx->rc_buffer_size) &&
298
        (avctx->rc_initial_buffer_occupancy <= avctx->rc_buffer_size)) {
299
        x4->params.rc.f_vbv_buffer_init =
300
            (float)avctx->rc_initial_buffer_occupancy / avctx->rc_buffer_size;
301
    } else
302
        x4->params.rc.f_vbv_buffer_init = 0.9;
303

    
304
    /* TAG:do we have MB tree RC method */
305
    /* what is the RC method we are now using? Default NO */
306
    x4->params.rc.b_mb_tree               = !!(avctx->flags2 & CODEC_FLAG2_MBTREE);
307
    x4->params.rc.f_ip_factor             = 1 / fabs(avctx->i_quant_factor);
308
    x4->params.rc.f_pb_factor             = avctx->b_quant_factor;
309
    x4->params.analyse.i_chroma_qp_offset = avctx->chromaoffset;
310

    
311
    x4->params.analyse.b_psnr = avctx->flags & CODEC_FLAG_PSNR;
312
    x4->params.i_log_level    = XAVS_LOG_DEBUG;
313
    x4->params.b_aud          = avctx->flags2 & CODEC_FLAG2_AUD;
314
    x4->params.i_threads      = avctx->thread_count;
315
    x4->params.b_interlaced   = avctx->flags & CODEC_FLAG_INTERLACED_DCT;
316

    
317
    if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER)
318
        x4->params.b_repeat_headers = 0;
319

    
320
    x4->enc = xavs_encoder_open(&x4->params);
321
    if (!x4->enc)
322
        return -1;
323

    
324
    avctx->coded_frame = &x4->out_pic;
325
    /* TAG: Do we have GLOBAL HEADER in AVS */
326
    /* We Have PPS and SPS in AVS */
327
    if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) {
328
        xavs_nal_t *nal;
329
        int nnal, s;
330

    
331
        s = xavs_encoder_headers(x4->enc, &nal, &nnal);
332

    
333
        avctx->extradata      = av_malloc(s);
334
        avctx->extradata_size = encode_nals(avctx, avctx->extradata, s, nal, nnal, 1);
335
    }
336
    return 0;
337
}
338

    
339
AVCodec ff_libxavs_encoder = {
340
    .name           = "libxavs",
341
    .type           = AVMEDIA_TYPE_VIDEO,
342
    .id             = CODEC_ID_CAVS,
343
    .priv_data_size = sizeof(XavsContext),
344
    .init           = XAVS_init,
345
    .encode         = XAVS_frame,
346
    .close          = XAVS_close,
347
    .capabilities   = CODEC_CAP_DELAY,
348
    .pix_fmts       = (const enum PixelFormat[]) { PIX_FMT_YUV420P, PIX_FMT_NONE },
349
    .long_name      = NULL_IF_CONFIG_SMALL("libxavs - the Chinese Audio Video Standard Encoder"),
350
};
351