2 * OpenH264 video encoder
3 * Copyright (C) 2014 Martin Storsjo
5 * This file is part of FFmpeg.
7 * FFmpeg 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.
12 * FFmpeg 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.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include <wels/codec_api.h>
23 #include <wels/codec_ver.h>
25 #include "libavutil/attributes.h"
26 #include "libavutil/common.h"
27 #include "libavutil/opt.h"
28 #include "libavutil/intreadwrite.h"
29 #include "libavutil/mathematics.h"
34 typedef struct SVCContext {
35 const AVClass *av_class;
42 #define OPENH264_VER_AT_LEAST(maj, min) \
43 ((OPENH264_MAJOR > (maj)) || \
44 (OPENH264_MAJOR == (maj) && OPENH264_MINOR >= (min)))
46 #define OFFSET(x) offsetof(SVCContext, x)
47 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
48 static const AVOption options[] = {
49 { "slice_mode", "set slice mode", OFFSET(slice_mode), AV_OPT_TYPE_INT, { .i64 = SM_AUTO_SLICE }, SM_SINGLE_SLICE, SM_RESERVED, VE, "slice_mode" },
50 { "fixed", "a fixed number of slices", 0, AV_OPT_TYPE_CONST, { .i64 = SM_FIXEDSLCNUM_SLICE }, 0, 0, VE, "slice_mode" },
51 { "rowmb", "one slice per row of macroblocks", 0, AV_OPT_TYPE_CONST, { .i64 = SM_ROWMB_SLICE }, 0, 0, VE, "slice_mode" },
52 { "auto", "automatic number of slices according to number of threads", 0, AV_OPT_TYPE_CONST, { .i64 = SM_AUTO_SLICE }, 0, 0, VE, "slice_mode" },
53 { "loopfilter", "enable loop filter", OFFSET(loopfilter), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, VE },
54 { "profile", "set profile restrictions", OFFSET(profile), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },
58 static const AVClass class = {
59 "libopenh264enc", av_default_item_name, options, LIBAVUTIL_VERSION_INT
62 // Convert libopenh264 log level to equivalent ffmpeg log level.
63 static int libopenh264_to_libav_log_level(int libopenh264_log_level)
65 if (libopenh264_log_level >= WELS_LOG_DETAIL) return AV_LOG_TRACE;
66 else if (libopenh264_log_level >= WELS_LOG_DEBUG) return AV_LOG_DEBUG;
67 else if (libopenh264_log_level >= WELS_LOG_INFO) return AV_LOG_VERBOSE;
68 else if (libopenh264_log_level >= WELS_LOG_WARNING) return AV_LOG_WARNING;
69 else if (libopenh264_log_level >= WELS_LOG_ERROR) return AV_LOG_ERROR;
70 else return AV_LOG_QUIET;
73 // This function will be provided to the libopenh264 library. The function will be called
74 // when libopenh264 wants to log a message (error, warning, info, etc.). The signature for
75 // this function (defined in .../codec/api/svc/codec_api.h) is:
77 // typedef void (*WelsTraceCallback) (void* ctx, int level, const char* string);
79 static void libopenh264_trace_callback(void *ctx, int level, char const *msg)
81 // The message will be logged only if the requested EQUIVALENT ffmpeg log level is
82 // less than or equal to the current ffmpeg log level.
83 int equiv_libav_log_level = libopenh264_to_libav_log_level(level);
84 av_log(ctx, equiv_libav_log_level, "%s\n", msg);
87 static av_cold int svc_encode_close(AVCodecContext *avctx)
89 SVCContext *s = avctx->priv_data;
92 WelsDestroySVCEncoder(s->encoder);
96 static av_cold int svc_encode_init(AVCodecContext *avctx)
98 SVCContext *s = avctx->priv_data;
99 SEncParamExt param = { 0 };
100 int err = AVERROR_UNKNOWN;
102 WelsTraceCallback callback_function;
104 // Mingw GCC < 4.7 on x86_32 uses an incorrect/buggy ABI for the WelsGetCodecVersion
105 // function (for functions returning larger structs), thus skip the check in those
107 #if !defined(_WIN32) || !defined(__GNUC__) || !ARCH_X86_32 || AV_GCC_VERSION_AT_LEAST(4, 7)
108 OpenH264Version libver = WelsGetCodecVersion();
109 if (memcmp(&libver, &g_stCodecVersion, sizeof(libver))) {
110 av_log(avctx, AV_LOG_ERROR, "Incorrect library version loaded\n");
111 return AVERROR(EINVAL);
115 if (WelsCreateSVCEncoder(&s->encoder)) {
116 av_log(avctx, AV_LOG_ERROR, "Unable to create encoder\n");
117 return AVERROR_UNKNOWN;
120 // Pass all libopenh264 messages to our callback, to allow ourselves to filter them.
121 log_level = WELS_LOG_DETAIL;
122 (*s->encoder)->SetOption(s->encoder, ENCODER_OPTION_TRACE_LEVEL, &log_level);
124 // Set the logging callback function to one that uses av_log() (see implementation above).
125 callback_function = (WelsTraceCallback) libopenh264_trace_callback;
126 (*s->encoder)->SetOption(s->encoder, ENCODER_OPTION_TRACE_CALLBACK, (void *)&callback_function);
128 // Set the AVCodecContext as the libopenh264 callback context so that it can be passed to av_log().
129 (*s->encoder)->SetOption(s->encoder, ENCODER_OPTION_TRACE_CALLBACK_CONTEXT, (void *)&avctx);
131 (*s->encoder)->GetDefaultParams(s->encoder, ¶m);
133 param.fMaxFrameRate = 1/av_q2d(avctx->time_base);
134 param.iPicWidth = avctx->width;
135 param.iPicHeight = avctx->height;
136 param.iTargetBitrate = avctx->bit_rate;
137 param.iMaxBitrate = FFMAX(avctx->rc_max_rate, avctx->bit_rate);
138 param.iRCMode = RC_QUALITY_MODE;
139 param.iTemporalLayerNum = 1;
140 param.iSpatialLayerNum = 1;
141 param.bEnableDenoise = 0;
142 param.bEnableBackgroundDetection = 1;
143 param.bEnableAdaptiveQuant = 1;
144 param.bEnableFrameSkip = 0;
145 param.bEnableLongTermReference = 0;
146 param.iLtrMarkPeriod = 30;
147 param.uiIntraPeriod = avctx->gop_size;
148 #if OPENH264_VER_AT_LEAST(1, 4)
149 param.eSpsPpsIdStrategy = CONSTANT_ID;
151 param.bEnableSpsPpsIdAddition = 0;
153 param.bPrefixNalAddingCtrl = 0;
154 param.iLoopFilterDisableIdc = !s->loopfilter;
155 param.iEntropyCodingModeFlag = 0;
156 param.iMultipleThreadIdc = avctx->thread_count;
157 if (s->profile && !strcmp(s->profile, "main"))
158 param.iEntropyCodingModeFlag = 1;
159 else if (!s->profile && avctx->coder_type == FF_CODER_TYPE_AC)
160 param.iEntropyCodingModeFlag = 1;
162 param.sSpatialLayers[0].iVideoWidth = param.iPicWidth;
163 param.sSpatialLayers[0].iVideoHeight = param.iPicHeight;
164 param.sSpatialLayers[0].fFrameRate = param.fMaxFrameRate;
165 param.sSpatialLayers[0].iSpatialBitrate = param.iTargetBitrate;
166 param.sSpatialLayers[0].iMaxSpatialBitrate = param.iMaxBitrate;
168 if (avctx->slices > 1)
169 s->slice_mode = SM_FIXEDSLCNUM_SLICE;
170 param.sSpatialLayers[0].sSliceCfg.uiSliceMode = s->slice_mode;
171 param.sSpatialLayers[0].sSliceCfg.sSliceArgument.uiSliceNum = avctx->slices;
173 if ((*s->encoder)->InitializeExt(s->encoder, ¶m) != cmResultSuccess) {
174 av_log(avctx, AV_LOG_ERROR, "Initialize failed\n");
178 if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) {
179 SFrameBSInfo fbi = { 0 };
181 (*s->encoder)->EncodeParameterSets(s->encoder, &fbi);
182 for (i = 0; i < fbi.sLayerInfo[0].iNalCount; i++)
183 size += fbi.sLayerInfo[0].pNalLengthInByte[i];
184 avctx->extradata = av_mallocz(size + AV_INPUT_BUFFER_PADDING_SIZE);
185 if (!avctx->extradata) {
186 err = AVERROR(ENOMEM);
189 avctx->extradata_size = size;
190 memcpy(avctx->extradata, fbi.sLayerInfo[0].pBsBuf, size);
196 svc_encode_close(avctx);
200 static int svc_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
201 const AVFrame *frame, int *got_packet)
203 SVCContext *s = avctx->priv_data;
204 SFrameBSInfo fbi = { 0 };
207 SSourcePicture sp = { 0 };
208 int size = 0, layer, first_layer = 0;
209 int layer_size[MAX_LAYER_NUM_OF_FRAME] = { 0 };
211 sp.iColorFormat = videoFormatI420;
212 for (i = 0; i < 3; i++) {
213 sp.iStride[i] = frame->linesize[i];
214 sp.pData[i] = frame->data[i];
216 sp.iPicWidth = avctx->width;
217 sp.iPicHeight = avctx->height;
219 encoded = (*s->encoder)->EncodeFrame(s->encoder, &sp, &fbi);
220 if (encoded != cmResultSuccess) {
221 av_log(avctx, AV_LOG_ERROR, "EncodeFrame failed\n");
222 return AVERROR_UNKNOWN;
224 if (fbi.eFrameType == videoFrameTypeSkip) {
225 av_log(avctx, AV_LOG_DEBUG, "frame skipped\n");
229 // Normal frames are returned with one single layer, while IDR
230 // frames have two layers, where the first layer contains the SPS/PPS.
231 // If using global headers, don't include the SPS/PPS in the returned
232 // packet - thus, only return one layer.
233 if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER)
234 first_layer = fbi.iLayerNum - 1;
236 for (layer = first_layer; layer < fbi.iLayerNum; layer++) {
237 for (i = 0; i < fbi.sLayerInfo[layer].iNalCount; i++)
238 layer_size[layer] += fbi.sLayerInfo[layer].pNalLengthInByte[i];
239 size += layer_size[layer];
241 av_log(avctx, AV_LOG_DEBUG, "%d slices\n", fbi.sLayerInfo[fbi.iLayerNum - 1].iNalCount);
243 if ((ret = ff_alloc_packet2(avctx, avpkt, size, size))) {
244 av_log(avctx, AV_LOG_ERROR, "Error getting output packet\n");
248 for (layer = first_layer; layer < fbi.iLayerNum; layer++) {
249 memcpy(avpkt->data + size, fbi.sLayerInfo[layer].pBsBuf, layer_size[layer]);
250 size += layer_size[layer];
252 avpkt->pts = frame->pts;
253 if (fbi.eFrameType == videoFrameTypeIDR)
254 avpkt->flags |= AV_PKT_FLAG_KEY;
259 AVCodec ff_libopenh264_encoder = {
260 .name = "libopenh264",
261 .long_name = NULL_IF_CONFIG_SMALL("OpenH264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
262 .type = AVMEDIA_TYPE_VIDEO,
263 .id = AV_CODEC_ID_H264,
264 .priv_data_size = sizeof(SVCContext),
265 .init = svc_encode_init,
266 .encode2 = svc_encode_frame,
267 .close = svc_encode_close,
268 .capabilities = AV_CODEC_CAP_AUTO_THREADS,
269 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P,
271 .priv_class = &class,