summaryrefslogtreecommitdiff
path: root/libavcodec/libopenh264enc.c
blob: fdadb101f513a369bf121701361a325c5e41f3bc (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
/*
 * OpenH264 video encoder
 * Copyright (C) 2014 Martin Storsjo
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <wels/codec_api.h>
#include <wels/codec_ver.h>

#include "libavutil/attributes.h"
#include "libavutil/common.h"
#include "libavutil/opt.h"
#include "libavutil/internal.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mathematics.h"

#include "avcodec.h"
#include "internal.h"
#include "libopenh264.h"

#if !OPENH264_VER_AT_LEAST(1, 6)
#define SM_SIZELIMITED_SLICE SM_DYN_SLICE
#endif

typedef struct SVCContext {
    const AVClass *av_class;
    ISVCEncoder *encoder;
    int slice_mode;
    int loopfilter;
    char *profile;
    int max_nal_size;
    int skip_frames;
    int skipped;
    int cabac;
} SVCContext;

#define OFFSET(x) offsetof(SVCContext, x)
#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
static const AVOption options[] = {
#if OPENH264_VER_AT_LEAST(1, 6)
    { "slice_mode", "set slice mode", OFFSET(slice_mode), AV_OPT_TYPE_INT, { .i64 = SM_FIXEDSLCNUM_SLICE }, SM_SINGLE_SLICE, SM_RESERVED, VE, "slice_mode" },
#else
    { "slice_mode", "set slice mode", OFFSET(slice_mode), AV_OPT_TYPE_INT, { .i64 = SM_AUTO_SLICE }, SM_SINGLE_SLICE, SM_RESERVED, VE, "slice_mode" },
#endif
        { "fixed", "a fixed number of slices", 0, AV_OPT_TYPE_CONST, { .i64 = SM_FIXEDSLCNUM_SLICE }, 0, 0, VE, "slice_mode" },
#if OPENH264_VER_AT_LEAST(1, 6)
        { "dyn", "Size limited (compatibility name)", 0, AV_OPT_TYPE_CONST, { .i64 = SM_SIZELIMITED_SLICE }, 0, 0, VE, "slice_mode" },
        { "sizelimited", "Size limited", 0, AV_OPT_TYPE_CONST, { .i64 = SM_SIZELIMITED_SLICE }, 0, 0, VE, "slice_mode" },
#else
        { "rowmb", "one slice per row of macroblocks", 0, AV_OPT_TYPE_CONST, { .i64 = SM_ROWMB_SLICE }, 0, 0, VE, "slice_mode" },
        { "auto", "automatic number of slices according to number of threads", 0, AV_OPT_TYPE_CONST, { .i64 = SM_AUTO_SLICE }, 0, 0, VE, "slice_mode" },
        { "dyn", "Dynamic slicing", 0, AV_OPT_TYPE_CONST, { .i64 = SM_DYN_SLICE }, 0, 0, VE, "slice_mode" },
#endif
    { "loopfilter", "enable loop filter", OFFSET(loopfilter), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, VE },
    { "profile", "set profile restrictions", OFFSET(profile), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, VE },
    { "max_nal_size", "set maximum NAL size in bytes", OFFSET(max_nal_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VE },
    { "allow_skip_frames", "allow skipping frames to hit the target bitrate", OFFSET(skip_frames), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
    { "cabac", "Enable cabac", OFFSET(cabac), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
    { NULL }
};

static const AVClass class = {
    .class_name = "libvo_amrwbenc",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
};

static av_cold int svc_encode_close(AVCodecContext *avctx)
{
    SVCContext *s = avctx->priv_data;

    if (s->encoder)
        WelsDestroySVCEncoder(s->encoder);
    if (s->skipped > 0)
        av_log(avctx, AV_LOG_WARNING, "%d frames skipped\n", s->skipped);
    return 0;
}

static av_cold int svc_encode_init(AVCodecContext *avctx)
{
    SVCContext *s = avctx->priv_data;
    SEncParamExt param = { 0 };
    int err;
    int log_level;
    WelsTraceCallback callback_function;
    AVCPBProperties *props;

    if ((err = ff_libopenh264_check_version(avctx)) < 0)
        return err;

    if (WelsCreateSVCEncoder(&s->encoder)) {
        av_log(avctx, AV_LOG_ERROR, "Unable to create encoder\n");
        return AVERROR_UNKNOWN;
    }

    // Pass all libopenh264 messages to our callback, to allow ourselves to filter them.
    log_level = WELS_LOG_DETAIL;
    (*s->encoder)->SetOption(s->encoder, ENCODER_OPTION_TRACE_LEVEL, &log_level);

    // Set the logging callback function to one that uses av_log() (see implementation above).
    callback_function = (WelsTraceCallback) ff_libopenh264_trace_callback;
    (*s->encoder)->SetOption(s->encoder, ENCODER_OPTION_TRACE_CALLBACK, &callback_function);

    // Set the AVCodecContext as the libopenh264 callback context so that it can be passed to av_log().
    (*s->encoder)->SetOption(s->encoder, ENCODER_OPTION_TRACE_CALLBACK_CONTEXT, &avctx);

    (*s->encoder)->GetDefaultParams(s->encoder, &param);

#if FF_API_CODER_TYPE
FF_DISABLE_DEPRECATION_WARNINGS
    if (!s->cabac)
        s->cabac = avctx->coder_type == FF_CODER_TYPE_AC;
FF_ENABLE_DEPRECATION_WARNINGS
#endif

    param.fMaxFrameRate              = 1/av_q2d(avctx->time_base);
    param.iPicWidth                  = avctx->width;
    param.iPicHeight                 = avctx->height;
    param.iTargetBitrate             = avctx->bit_rate;
    param.iMaxBitrate                = FFMAX(avctx->rc_max_rate, avctx->bit_rate);
    param.iRCMode                    = RC_QUALITY_MODE;
    param.iTemporalLayerNum          = 1;
    param.iSpatialLayerNum           = 1;
    param.bEnableDenoise             = 0;
    param.bEnableBackgroundDetection = 1;
    param.bEnableAdaptiveQuant       = 1;
    param.bEnableFrameSkip           = s->skip_frames;
    param.bEnableLongTermReference   = 0;
    param.iLtrMarkPeriod             = 30;
    param.uiIntraPeriod              = avctx->gop_size;
#if OPENH264_VER_AT_LEAST(1, 4)
    param.eSpsPpsIdStrategy          = CONSTANT_ID;
#else
    param.bEnableSpsPpsIdAddition    = 0;
#endif
    param.bPrefixNalAddingCtrl       = 0;
    param.iLoopFilterDisableIdc      = !s->loopfilter;
    param.iEntropyCodingModeFlag     = 0;
    param.iMultipleThreadIdc         = avctx->thread_count;
    if (s->profile && !strcmp(s->profile, "main"))
        param.iEntropyCodingModeFlag = 1;
    else if (!s->profile && s->cabac)
        param.iEntropyCodingModeFlag = 1;

    param.sSpatialLayers[0].iVideoWidth         = param.iPicWidth;
    param.sSpatialLayers[0].iVideoHeight        = param.iPicHeight;
    param.sSpatialLayers[0].fFrameRate          = param.fMaxFrameRate;
    param.sSpatialLayers[0].iSpatialBitrate     = param.iTargetBitrate;
    param.sSpatialLayers[0].iMaxSpatialBitrate  = param.iMaxBitrate;

    if ((avctx->slices > 1) && (s->max_nal_size)) {
        av_log(avctx, AV_LOG_ERROR,
               "Invalid combination -slices %d and -max_nal_size %d.\n",
               avctx->slices, s->max_nal_size);
        return AVERROR(EINVAL);
    }

    if (avctx->slices > 1)
        s->slice_mode = SM_FIXEDSLCNUM_SLICE;

    if (s->max_nal_size)
        s->slice_mode = SM_SIZELIMITED_SLICE;

#if OPENH264_VER_AT_LEAST(1, 6)
    param.sSpatialLayers[0].sSliceArgument.uiSliceMode = s->slice_mode;
    param.sSpatialLayers[0].sSliceArgument.uiSliceNum  = avctx->slices;
#else
    param.sSpatialLayers[0].sSliceCfg.uiSliceMode               = s->slice_mode;
    param.sSpatialLayers[0].sSliceCfg.sSliceArgument.uiSliceNum = avctx->slices;
#endif

    if (s->slice_mode == SM_SIZELIMITED_SLICE) {
        if (s->max_nal_size){
            param.uiMaxNalSize = s->max_nal_size;
#if OPENH264_VER_AT_LEAST(1, 6)
            param.sSpatialLayers[0].sSliceArgument.uiSliceSizeConstraint = s->max_nal_size;
#else
            param.sSpatialLayers[0].sSliceCfg.sSliceArgument.uiSliceSizeConstraint = s->max_nal_size;
#endif
        } else {
            av_log(avctx, AV_LOG_ERROR, "Invalid -max_nal_size, "
                   "specify a valid max_nal_size to use -slice_mode dyn\n");
            return AVERROR(EINVAL);
        }
    }

    if ((*s->encoder)->InitializeExt(s->encoder, &param) != cmResultSuccess) {
        av_log(avctx, AV_LOG_ERROR, "Initialize failed\n");
        return AVERROR_UNKNOWN;
    }

    if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) {
        SFrameBSInfo fbi = { 0 };
        int i, size = 0;
        (*s->encoder)->EncodeParameterSets(s->encoder, &fbi);
        for (i = 0; i < fbi.sLayerInfo[0].iNalCount; i++)
            size += fbi.sLayerInfo[0].pNalLengthInByte[i];
        avctx->extradata = av_mallocz(size + AV_INPUT_BUFFER_PADDING_SIZE);
        if (!avctx->extradata)
            return AVERROR(ENOMEM);
        avctx->extradata_size = size;
        memcpy(avctx->extradata, fbi.sLayerInfo[0].pBsBuf, size);
    }

    props = ff_add_cpb_side_data(avctx);
    if (!props)
        return AVERROR(ENOMEM);
    props->max_bitrate = param.iMaxBitrate;
    props->avg_bitrate = param.iTargetBitrate;

    return 0;
}

static int svc_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
                            const AVFrame *frame, int *got_packet)
{
    SVCContext *s = avctx->priv_data;
    SFrameBSInfo fbi = { 0 };
    int i, ret;
    int encoded;
    SSourcePicture sp = { 0 };
    int size = 0, layer, first_layer = 0;
    int layer_size[MAX_LAYER_NUM_OF_FRAME] = { 0 };

    sp.iColorFormat = videoFormatI420;
    for (i = 0; i < 3; i++) {
        sp.iStride[i] = frame->linesize[i];
        sp.pData[i]   = frame->data[i];
    }
    sp.iPicWidth  = avctx->width;
    sp.iPicHeight = avctx->height;

    encoded = (*s->encoder)->EncodeFrame(s->encoder, &sp, &fbi);
    if (encoded != cmResultSuccess) {
        av_log(avctx, AV_LOG_ERROR, "EncodeFrame failed\n");
        return AVERROR_UNKNOWN;
    }
    if (fbi.eFrameType == videoFrameTypeSkip) {
        s->skipped++;
        av_log(avctx, AV_LOG_DEBUG, "frame skipped\n");
        return 0;
    }
    first_layer = 0;
    // Normal frames are returned with one single layer, while IDR
    // frames have two layers, where the first layer contains the SPS/PPS.
    // If using global headers, don't include the SPS/PPS in the returned
    // packet - thus, only return one layer.
    if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER)
        first_layer = fbi.iLayerNum - 1;

    for (layer = first_layer; layer < fbi.iLayerNum; layer++) {
        for (i = 0; i < fbi.sLayerInfo[layer].iNalCount; i++)
            layer_size[layer] += fbi.sLayerInfo[layer].pNalLengthInByte[i];
        size += layer_size[layer];
    }
    av_log(avctx, AV_LOG_DEBUG, "%d slices\n", fbi.sLayerInfo[fbi.iLayerNum - 1].iNalCount);

    if ((ret = ff_alloc_packet2(avctx, avpkt, size, size))) {
        av_log(avctx, AV_LOG_ERROR, "Error getting output packet\n");
        return ret;
    }
    size = 0;
    for (layer = first_layer; layer < fbi.iLayerNum; layer++) {
        memcpy(avpkt->data + size, fbi.sLayerInfo[layer].pBsBuf, layer_size[layer]);
        size += layer_size[layer];
    }
    avpkt->pts = frame->pts;
    if (fbi.eFrameType == videoFrameTypeIDR)
        avpkt->flags |= AV_PKT_FLAG_KEY;
    *got_packet = 1;
    return 0;
}

AVCodec ff_libopenh264_encoder = {
    .name           = "libopenh264",
    .long_name      = NULL_IF_CONFIG_SMALL("OpenH264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_H264,
    .priv_data_size = sizeof(SVCContext),
    .init           = svc_encode_init,
    .encode2        = svc_encode_frame,
    .close          = svc_encode_close,
    .capabilities   = AV_CODEC_CAP_AUTO_THREADS,
    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
    .pix_fmts       = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P,
                                                    AV_PIX_FMT_NONE },
    .priv_class     = &class,
    .wrapper_name   = "libopenh264",
};