summaryrefslogtreecommitdiff
path: root/libavcodec/libopenh264dec.c (plain)
blob: 26cc8db9d16eea4e84846dba920d9d6aefe108da
1/*
2 * OpenH264 video decoder
3 * Copyright (C) 2016 Martin Storsjo
4 *
5 * This file is part of FFmpeg.
6 *
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.
11 *
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.
16 *
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
20 */
21
22#include <wels/codec_api.h>
23#include <wels/codec_ver.h>
24
25#include "libavutil/common.h"
26#include "libavutil/fifo.h"
27#include "libavutil/imgutils.h"
28#include "libavutil/intreadwrite.h"
29#include "libavutil/mathematics.h"
30#include "libavutil/opt.h"
31
32#include "avcodec.h"
33#include "internal.h"
34#include "libopenh264.h"
35
36typedef struct SVCContext {
37 ISVCDecoder *decoder;
38 AVBSFContext *bsf;
39 AVFifoBuffer *packet_fifo;
40 AVPacket pkt_filtered;
41} SVCContext;
42
43static av_cold int svc_decode_close(AVCodecContext *avctx)
44{
45 SVCContext *s = avctx->priv_data;
46 AVPacket pkt;
47
48 if (s->decoder)
49 WelsDestroyDecoder(s->decoder);
50
51 while (s->packet_fifo && av_fifo_size(s->packet_fifo) >= sizeof(pkt)) {
52 av_fifo_generic_read(s->packet_fifo, &pkt, sizeof(pkt), NULL);
53 av_packet_unref(&pkt);
54 }
55
56 av_bsf_free(&s->bsf);
57 av_packet_unref(&s->pkt_filtered);
58 av_fifo_free(s->packet_fifo);
59
60 return 0;
61}
62
63static av_cold int svc_decode_init(AVCodecContext *avctx)
64{
65 SVCContext *s = avctx->priv_data;
66 SDecodingParam param = { 0 };
67 int err;
68 int log_level;
69 WelsTraceCallback callback_function;
70
71 if ((err = ff_libopenh264_check_version(avctx)) < 0)
72 return err;
73
74 s->packet_fifo = av_fifo_alloc(sizeof(AVPacket));
75 if (!s->packet_fifo)
76 return AVERROR(ENOMEM);
77
78 if (WelsCreateDecoder(&s->decoder)) {
79 av_log(avctx, AV_LOG_ERROR, "Unable to create decoder\n");
80 return AVERROR_UNKNOWN;
81 }
82
83 // Pass all libopenh264 messages to our callback, to allow ourselves to filter them.
84 log_level = WELS_LOG_DETAIL;
85 callback_function = ff_libopenh264_trace_callback;
86 (*s->decoder)->SetOption(s->decoder, DECODER_OPTION_TRACE_LEVEL, &log_level);
87 (*s->decoder)->SetOption(s->decoder, DECODER_OPTION_TRACE_CALLBACK, (void *)&callback_function);
88 (*s->decoder)->SetOption(s->decoder, DECODER_OPTION_TRACE_CALLBACK_CONTEXT, (void *)&avctx);
89
90#if !OPENH264_VER_AT_LEAST(1, 6)
91 param.eOutputColorFormat = videoFormatI420;
92#endif
93 param.eEcActiveIdc = ERROR_CON_DISABLE;
94 param.sVideoProperty.eVideoBsType = VIDEO_BITSTREAM_DEFAULT;
95
96 if ((*s->decoder)->Initialize(s->decoder, &param) != cmResultSuccess) {
97 av_log(avctx, AV_LOG_ERROR, "Initialize failed\n");
98 return AVERROR_UNKNOWN;
99 }
100
101 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
102
103 return 0;
104}
105
106static int init_bsf(AVCodecContext *avctx)
107{
108 SVCContext *s = avctx->priv_data;
109 const AVBitStreamFilter *filter;
110 int ret;
111
112 if (s->bsf)
113 return 0;
114
115 // If the input stream already is annex b, this BSF only passes the
116 // packets through unchanged.
117 filter = av_bsf_get_by_name("h264_mp4toannexb");
118 if (!filter)
119 return AVERROR_BUG;
120
121 ret = av_bsf_alloc(filter, &s->bsf);
122 if (ret < 0)
123 return ret;
124
125 ret = avcodec_parameters_from_context(s->bsf->par_in, avctx);
126 if (ret < 0)
127 return ret;
128
129 s->bsf->time_base_in = avctx->time_base;
130
131 ret = av_bsf_init(s->bsf);
132 if (ret < 0)
133 return ret;
134
135 return ret;
136}
137
138static int svc_decode_frame(AVCodecContext *avctx, void *data,
139 int *got_frame, AVPacket *avpkt)
140{
141 SVCContext *s = avctx->priv_data;
142 SBufferInfo info = { 0 };
143 uint8_t* ptrs[3];
144 int linesize[3];
145 AVFrame *avframe = data;
146 int ret;
147 DECODING_STATE state;
148
149 if ((ret = init_bsf(avctx)) < 0)
150 return ret;
151
152 if (avpkt->size) {
153 AVPacket input_ref = { 0 };
154 if (av_fifo_space(s->packet_fifo) < sizeof(input_ref)) {
155 ret = av_fifo_realloc2(s->packet_fifo,
156 av_fifo_size(s->packet_fifo) + sizeof(input_ref));
157 if (ret < 0)
158 return ret;
159 }
160
161 ret = av_packet_ref(&input_ref, avpkt);
162 if (ret < 0)
163 return ret;
164 av_fifo_generic_write(s->packet_fifo, &input_ref, sizeof(input_ref), NULL);
165 }
166
167 while (!*got_frame) {
168 /* prepare the input data -- convert to Annex B if needed */
169 if (s->pkt_filtered.size <= 0) {
170 AVPacket input_ref;
171
172 /* no more data */
173 if (av_fifo_size(s->packet_fifo) < sizeof(AVPacket))
174 return avpkt->size ? avpkt->size : 0;
175
176 av_packet_unref(&s->pkt_filtered);
177
178 av_fifo_generic_read(s->packet_fifo, &input_ref, sizeof(input_ref), NULL);
179 ret = av_bsf_send_packet(s->bsf, &input_ref);
180 if (ret < 0) {
181 av_packet_unref(&input_ref);
182 return ret;
183 }
184
185 ret = av_bsf_receive_packet(s->bsf, &s->pkt_filtered);
186 if (ret < 0)
187 av_packet_move_ref(&s->pkt_filtered, &input_ref);
188 else
189 av_packet_unref(&input_ref);
190 }
191
192 state = (*s->decoder)->DecodeFrame2(s->decoder, s->pkt_filtered.data, s->pkt_filtered.size, ptrs, &info);
193 s->pkt_filtered.size = 0;
194 if (state != dsErrorFree) {
195 av_log(avctx, AV_LOG_ERROR, "DecodeFrame2 failed\n");
196 return AVERROR_UNKNOWN;
197 }
198 if (info.iBufferStatus != 1) {
199 av_log(avctx, AV_LOG_DEBUG, "No frame produced\n");
200 continue;
201 }
202
203 ret = ff_set_dimensions(avctx, info.UsrData.sSystemBuffer.iWidth, info.UsrData.sSystemBuffer.iHeight);
204 if (ret < 0)
205 return ret;
206 // The decoder doesn't (currently) support decoding into a user
207 // provided buffer, so do a copy instead.
208 if (ff_get_buffer(avctx, avframe, 0) < 0) {
209 av_log(avctx, AV_LOG_ERROR, "Unable to allocate buffer\n");
210 return AVERROR(ENOMEM);
211 }
212
213 linesize[0] = info.UsrData.sSystemBuffer.iStride[0];
214 linesize[1] = linesize[2] = info.UsrData.sSystemBuffer.iStride[1];
215 av_image_copy(avframe->data, avframe->linesize, (const uint8_t **) ptrs, linesize, avctx->pix_fmt, avctx->width, avctx->height);
216
217 avframe->pts = s->pkt_filtered.pts;
218 avframe->pkt_dts = s->pkt_filtered.dts;
219#if FF_API_PKT_PTS
220FF_DISABLE_DEPRECATION_WARNINGS
221 avframe->pkt_pts = s->pkt_filtered.pts;
222FF_ENABLE_DEPRECATION_WARNINGS
223#endif
224
225 *got_frame = 1;
226 }
227 return avpkt->size;
228}
229
230AVCodec ff_libopenh264_decoder = {
231 .name = "libopenh264",
232 .long_name = NULL_IF_CONFIG_SMALL("OpenH264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
233 .type = AVMEDIA_TYPE_VIDEO,
234 .id = AV_CODEC_ID_H264,
235 .priv_data_size = sizeof(SVCContext),
236 .init = svc_decode_init,
237 .decode = svc_decode_frame,
238 .close = svc_decode_close,
239 // The decoder doesn't currently support B-frames, and the decoder's API
240 // doesn't support reordering/delay, but the BSF could incur delay.
241 .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_DR1,
242 .caps_internal = FF_CODEC_CAP_SETS_PKT_DTS | FF_CODEC_CAP_INIT_THREADSAFE |
243 FF_CODEC_CAP_INIT_CLEANUP,
244};
245
generated by cgit at 2024-05-17 03:08:40 (GMT)