FFmpeg  4.3.8
libdavs2.c
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1 /*
2  * AVS2 decoding using the davs2 library
3  *
4  * Copyright (C) 2018 Yiqun Xu, <yiqun.xu@vipl.ict.ac.cn>
5  * Falei Luo, <falei.luo@gmail.com>
6  * Huiwen Ren, <hwrenx@gmail.com>
7  *
8  * This file is part of FFmpeg.
9  *
10  * FFmpeg is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU Lesser General Public
12  * License as published by the Free Software Foundation; either
13  * version 2.1 of the License, or (at your option) any later version.
14  *
15  * FFmpeg is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18  * Lesser General Public License for more details.
19  *
20  * You should have received a copy of the GNU Lesser General Public
21  * License along with FFmpeg; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23  */
24 
25 #include "avcodec.h"
26 #include "davs2.h"
27 
28 typedef struct DAVS2Context {
29  void *decoder;
30 
32  davs2_param_t param; // decoding parameters
33  davs2_packet_t packet; // input bitstream
34 
35  davs2_picture_t out_frame; // output data, frame data
36  davs2_seq_info_t headerset; // output data, sequence header
37 
39 
40 static av_cold int davs2_init(AVCodecContext *avctx)
41 {
42  DAVS2Context *cad = avctx->priv_data;
44 
45  /* init the decoder */
46  cad->param.threads = avctx->thread_count;
47  cad->param.info_level = 0;
48  cad->param.disable_avx = !(cpu_flags & AV_CPU_FLAG_AVX &&
49  cpu_flags & AV_CPU_FLAG_AVX2);
50  cad->decoder = davs2_decoder_open(&cad->param);
51 
52  if (!cad->decoder) {
53  av_log(avctx, AV_LOG_ERROR, "decoder created error.");
54  return AVERROR_EXTERNAL;
55  }
56 
57  av_log(avctx, AV_LOG_VERBOSE, "decoder created. %p\n", cad->decoder);
58  return 0;
59 }
60 
61 static int davs2_dump_frames(AVCodecContext *avctx, davs2_picture_t *pic, int *got_frame,
62  davs2_seq_info_t *headerset, int ret_type, AVFrame *frame)
63 {
64  DAVS2Context *cad = avctx->priv_data;
65  int bytes_per_sample = pic->bytes_per_sample;
66  int plane = 0;
67  int line = 0;
68 
69  if (!headerset) {
70  *got_frame = 0;
71  return 0;
72  }
73 
74  if (!pic || ret_type == DAVS2_GOT_HEADER) {
75  avctx->width = headerset->width;
76  avctx->height = headerset->height;
77  avctx->pix_fmt = headerset->output_bit_depth == 10 ?
79 
80  avctx->framerate = av_d2q(headerset->frame_rate,4096);
81  *got_frame = 0;
82  return 0;
83  }
84 
85  switch (pic->type) {
86  case DAVS2_PIC_I:
87  case DAVS2_PIC_G:
89  break;
90  case DAVS2_PIC_P:
91  case DAVS2_PIC_S:
93  break;
94  case DAVS2_PIC_B:
96  break;
97  case DAVS2_PIC_F:
99  break;
100  default:
101  av_log(avctx, AV_LOG_ERROR, "Decoder error: unknown frame type\n");
102  return AVERROR_EXTERNAL;
103  }
104 
105  for (plane = 0; plane < 3; ++plane) {
106  int size_line = pic->widths[plane] * bytes_per_sample;
107  frame->buf[plane] = av_buffer_alloc(size_line * pic->lines[plane]);
108 
109  if (!frame->buf[plane]){
110  av_log(avctx, AV_LOG_ERROR, "Decoder error: allocation failure, can't dump frames.\n");
111  return AVERROR(ENOMEM);
112  }
113 
114  frame->data[plane] = frame->buf[plane]->data;
115  frame->linesize[plane] = size_line;
116 
117  for (line = 0; line < pic->lines[plane]; ++line)
118  memcpy(frame->data[plane] + line * size_line,
119  pic->planes[plane] + line * pic->strides[plane],
120  pic->widths[plane] * bytes_per_sample);
121  }
122 
123  frame->width = cad->headerset.width;
124  frame->height = cad->headerset.height;
125  frame->pts = cad->out_frame.pts;
126  frame->format = avctx->pix_fmt;
127 
128  *got_frame = 1;
129  return 0;
130 }
131 
132 static void davs2_flush(AVCodecContext *avctx)
133 {
134  DAVS2Context *cad = avctx->priv_data;
135  int ret = DAVS2_GOT_FRAME;
136 
137  while (ret == DAVS2_GOT_FRAME) {
138  ret = davs2_decoder_flush(cad->decoder, &cad->headerset, &cad->out_frame);
139  davs2_decoder_frame_unref(cad->decoder, &cad->out_frame);
140  }
141 
142  if (ret == DAVS2_ERROR) {
143  av_log(avctx, AV_LOG_WARNING, "Decoder flushing failed.\n");
144  }
145 }
146 
147 static int send_delayed_frame(AVCodecContext *avctx, AVFrame *frame, int *got_frame)
148 {
149  DAVS2Context *cad = avctx->priv_data;
150  int ret = DAVS2_DEFAULT;
151 
152  ret = davs2_decoder_flush(cad->decoder, &cad->headerset, &cad->out_frame);
153  if (ret == DAVS2_ERROR) {
154  av_log(avctx, AV_LOG_ERROR, "Decoder error: can't flush delayed frame\n");
155  return AVERROR_EXTERNAL;
156  }
157  if (ret == DAVS2_GOT_FRAME) {
158  ret = davs2_dump_frames(avctx, &cad->out_frame, got_frame, &cad->headerset, ret, frame);
159  davs2_decoder_frame_unref(cad->decoder, &cad->out_frame);
160  }
161  return ret;
162 }
163 
164 static av_cold int davs2_end(AVCodecContext *avctx)
165 {
166  DAVS2Context *cad = avctx->priv_data;
167 
168  /* close the decoder */
169  if (cad->decoder) {
170  davs2_decoder_close(cad->decoder);
171  cad->decoder = NULL;
172  }
173 
174  return 0;
175 }
176 
177 static int davs2_decode_frame(AVCodecContext *avctx, void *data,
178  int *got_frame, AVPacket *avpkt)
179 {
180  DAVS2Context *cad = avctx->priv_data;
181  int buf_size = avpkt->size;
182  uint8_t *buf_ptr = avpkt->data;
183  AVFrame *frame = data;
184  int ret = DAVS2_DEFAULT;
185 
186  /* end of stream, output what is still in the buffers */
187  if (!buf_size) {
188  return send_delayed_frame(avctx, frame, got_frame);
189  }
190 
191  cad->packet.data = buf_ptr;
192  cad->packet.len = buf_size;
193  cad->packet.pts = avpkt->pts;
194  cad->packet.dts = avpkt->dts;
195 
196  ret = davs2_decoder_send_packet(cad->decoder, &cad->packet);
197 
198 
199  if (ret == DAVS2_ERROR) {
200  av_log(avctx, AV_LOG_ERROR, "Decoder error: can't read packet\n");
201  return AVERROR_EXTERNAL;
202  }
203 
204  ret = davs2_decoder_recv_frame(cad->decoder, &cad->headerset, &cad->out_frame);
205 
206  if (ret != DAVS2_DEFAULT) {
207  ret = davs2_dump_frames(avctx, &cad->out_frame, got_frame, &cad->headerset, ret, frame);
208  davs2_decoder_frame_unref(cad->decoder, &cad->out_frame);
209  }
210 
211  return ret == 0 ? buf_size : ret;
212 }
213 
215  .name = "libdavs2",
216  .long_name = NULL_IF_CONFIG_SMALL("libdavs2 AVS2-P2/IEEE1857.4"),
217  .type = AVMEDIA_TYPE_VIDEO,
218  .id = AV_CODEC_ID_AVS2,
219  .priv_data_size = sizeof(DAVS2Context),
220  .init = davs2_init,
221  .close = davs2_end,
223  .flush = davs2_flush,
225  .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
226  AV_PIX_FMT_NONE },
227  .wrapper_name = "libdavs2",
228 };
#define AV_CPU_FLAG_AVX
AVX functions: requires OS support even if YMM registers aren&#39;t used.
Definition: cpu.h:49
#define NULL
Definition: coverity.c:32
AVRational framerate
Definition: avcodec.h:2069
S(GMC)-VOP MPEG-4.
Definition: avutil.h:277
This structure describes decoded (raw) audio or video data.
Definition: frame.h:300
static void flush(AVCodecContext *avctx)
davs2_picture_t out_frame
Definition: libdavs2.c:35
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
AVFrame * frame
Definition: libdavs2.c:31
AVBufferRef * buf[AV_NUM_DATA_POINTERS]
AVBuffer references backing the data for this frame.
Definition: frame.h:491
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
davs2_packet_t packet
Definition: libdavs2.c:33
int size
Definition: packet.h:356
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:736
static atomic_int cpu_flags
Definition: cpu.c:50
#define AV_CODEC_CAP_AUTO_THREADS
Codec supports avctx->thread_count == 0 (auto).
Definition: codec.h:118
AVCodec.
Definition: codec.h:190
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
static int send_delayed_frame(AVCodecContext *avctx, AVFrame *frame, int *got_frame)
Definition: libdavs2.c:147
#define AV_CODEC_CAP_DELAY
Encoder or decoder requires flushing with NULL input at the end in order to give the complete and cor...
Definition: codec.h:75
uint8_t
#define av_cold
Definition: attributes.h:88
AVCodec ff_libdavs2_decoder
Definition: libdavs2.c:214
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:393
const char data[16]
Definition: mxf.c:91
uint8_t * data
Definition: packet.h:355
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
#define AV_CPU_FLAG_AVX2
AVX2 functions: requires OS support even if YMM registers aren&#39;t used.
Definition: cpu.h:54
#define av_log(a,...)
int width
Definition: frame.h:358
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define AVERROR(e)
Definition: error.h:43
static av_cold int davs2_end(AVCodecContext *avctx)
Definition: libdavs2.c:164
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:188
Definition: graph2dot.c:48
const char * name
Name of the codec implementation.
Definition: codec.h:197
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:383
int width
picture width / height.
Definition: avcodec.h:699
static av_cold int davs2_init(AVCodecContext *avctx)
Definition: libdavs2.c:40
int thread_count
thread count is used to decide how many independent tasks should be passed to execute() ...
Definition: avcodec.h:1785
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:373
Libavcodec external API header.
AVBufferRef * av_buffer_alloc(int size)
Allocate an AVBuffer of the given size using av_malloc().
Definition: buffer.c:67
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:331
main external API structure.
Definition: avcodec.h:526
uint8_t * data
The data buffer.
Definition: buffer.h:89
#define AV_PIX_FMT_YUV420P10
Definition: pixfmt.h:397
static int davs2_dump_frames(AVCodecContext *avctx, davs2_picture_t *pic, int *got_frame, davs2_seq_info_t *headerset, int ret_type, AVFrame *frame)
Definition: libdavs2.c:61
static void davs2_flush(AVCodecContext *avctx)
Definition: libdavs2.c:132
void * decoder
Definition: libdavs2.c:29
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:93
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:275
davs2_seq_info_t headerset
Definition: libdavs2.c:36
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:314
AVRational av_d2q(double d, int max)
Convert a double precision floating point number to a rational.
Definition: rational.c:106
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
static int davs2_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: libdavs2.c:177
Bi-dir predicted.
Definition: avutil.h:276
void * priv_data
Definition: avcodec.h:553
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: packet.h:354
int height
Definition: frame.h:358
davs2_param_t param
Definition: libdavs2.c:32
#define AVERROR_EXTERNAL
Generic error in an external library.
Definition: error.h:57
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
This structure stores compressed data.
Definition: packet.h:332
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:348
Predicted.
Definition: avutil.h:275