1 /*
2 * Copyright (c) 2016, Alliance for Open Media. All rights reserved.
3 *
4 * This source code is subject to the terms of the BSD 2 Clause License and
5 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
6 * was not distributed with this source code in the LICENSE file, you can
7 * obtain it at www.aomedia.org/license/software. If the Alliance for Open
8 * Media Patent License 1.0 was not distributed with this source code in the
9 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
10 */
11
12 // AV1 Set Reference Frame
13 // ============================
14 //
15 // This is an example demonstrating how to overwrite the AV1 encoder's
16 // internal reference frame. In the sample we set the last frame to the
17 // current frame. This technique could be used to bounce between two cameras.
18 //
19 // The decoder would also have to set the reference frame to the same value
20 // on the same frame, or the video will become corrupt. The 'test_decode'
21 // variable is set to 1 in this example that tests if the encoder and decoder
22 // results are matching.
23 //
24 // Usage
25 // -----
26 // This example encodes a raw video. And the last argument passed in specifies
27 // the frame number to update the reference frame on. For example, run
28 // examples/aom_cx_set_ref av1 352 288 in.yuv out.ivf 4 30
29 // The parameter is parsed as follows:
30 //
31 //
32 // Extra Variables
33 // ---------------
34 // This example maintains the frame number passed on the command line
35 // in the `update_frame_num` variable.
36 //
37 //
38 // Configuration
39 // -------------
40 //
41 // The reference frame is updated on the frame specified on the command
42 // line.
43 //
44 // Observing The Effects
45 // ---------------------
46 // The encoder and decoder results should be matching when the same reference
47 // frame setting operation is done in both encoder and decoder. Otherwise,
48 // the encoder/decoder mismatch would be seen.
49
50 #include <stdio.h>
51 #include <stdlib.h>
52 #include <string.h>
53
54 #include "aom/aom_decoder.h"
55 #include "aom/aom_encoder.h"
56 #include "aom/aomcx.h"
57 #include "aom_scale/yv12config.h"
58 #include "common/tools_common.h"
59 #include "common/video_writer.h"
60 #include "examples/encoder_util.h"
61
62 static const char *exec_name;
63
usage_exit(void)64 void usage_exit(void) {
65 fprintf(stderr,
66 "Usage: %s <codec> <width> <height> <infile> <outfile> "
67 "<frame> <limit(optional)>\n",
68 exec_name);
69 exit(EXIT_FAILURE);
70 }
71
testing_decode(aom_codec_ctx_t * encoder,aom_codec_ctx_t * decoder,unsigned int frame_out,int * mismatch_seen)72 static void testing_decode(aom_codec_ctx_t *encoder, aom_codec_ctx_t *decoder,
73 unsigned int frame_out, int *mismatch_seen) {
74 aom_image_t enc_img, dec_img;
75
76 if (*mismatch_seen) return;
77
78 /* Get the internal reference frame */
79 if (aom_codec_control(encoder, AV1_GET_NEW_FRAME_IMAGE, &enc_img))
80 die_codec(encoder, "Failed to get encoder reference frame");
81 if (aom_codec_control(decoder, AV1_GET_NEW_FRAME_IMAGE, &dec_img))
82 die_codec(decoder, "Failed to get decoder reference frame");
83
84 if ((enc_img.fmt & AOM_IMG_FMT_HIGHBITDEPTH) !=
85 (dec_img.fmt & AOM_IMG_FMT_HIGHBITDEPTH)) {
86 if (enc_img.fmt & AOM_IMG_FMT_HIGHBITDEPTH) {
87 aom_image_t enc_hbd_img;
88 aom_img_alloc(&enc_hbd_img, enc_img.fmt - AOM_IMG_FMT_HIGHBITDEPTH,
89 enc_img.d_w, enc_img.d_h, 16);
90 aom_img_truncate_16_to_8(&enc_hbd_img, &enc_img);
91 enc_img = enc_hbd_img;
92 }
93 if (dec_img.fmt & AOM_IMG_FMT_HIGHBITDEPTH) {
94 aom_image_t dec_hbd_img;
95 aom_img_alloc(&dec_hbd_img, dec_img.fmt - AOM_IMG_FMT_HIGHBITDEPTH,
96 dec_img.d_w, dec_img.d_h, 16);
97 aom_img_truncate_16_to_8(&dec_hbd_img, &dec_img);
98 dec_img = dec_hbd_img;
99 }
100 }
101
102 if (!aom_compare_img(&enc_img, &dec_img)) {
103 int y[4], u[4], v[4];
104 if (enc_img.fmt & AOM_IMG_FMT_HIGHBITDEPTH) {
105 aom_find_mismatch_high(&enc_img, &dec_img, y, u, v);
106 } else {
107 aom_find_mismatch(&enc_img, &dec_img, y, u, v);
108 }
109
110 printf(
111 "Encode/decode mismatch on frame %u at"
112 " Y[%d, %d] {%d/%d},"
113 " U[%d, %d] {%d/%d},"
114 " V[%d, %d] {%d/%d}",
115 frame_out, y[0], y[1], y[2], y[3], u[0], u[1], u[2], u[3], v[0], v[1],
116 v[2], v[3]);
117 *mismatch_seen = 1;
118 }
119
120 aom_img_free(&enc_img);
121 aom_img_free(&dec_img);
122 }
123
encode_frame(aom_codec_ctx_t * ecodec,aom_image_t * img,unsigned int frame_in,AvxVideoWriter * writer,int test_decode,aom_codec_ctx_t * dcodec,unsigned int * frame_out,int * mismatch_seen,aom_image_t * ext_ref)124 static int encode_frame(aom_codec_ctx_t *ecodec, aom_image_t *img,
125 unsigned int frame_in, AvxVideoWriter *writer,
126 int test_decode, aom_codec_ctx_t *dcodec,
127 unsigned int *frame_out, int *mismatch_seen,
128 aom_image_t *ext_ref) {
129 int got_pkts = 0;
130 aom_codec_iter_t iter = NULL;
131 const aom_codec_cx_pkt_t *pkt = NULL;
132 int got_data;
133 const aom_codec_err_t res = aom_codec_encode(ecodec, img, frame_in, 1, 0);
134 if (res != AOM_CODEC_OK) die_codec(ecodec, "Failed to encode frame");
135
136 got_data = 0;
137
138 while ((pkt = aom_codec_get_cx_data(ecodec, &iter)) != NULL) {
139 got_pkts = 1;
140
141 if (pkt->kind == AOM_CODEC_CX_FRAME_PKT) {
142 const int keyframe = (pkt->data.frame.flags & AOM_FRAME_IS_KEY) != 0;
143
144 ++*frame_out;
145
146 if (!aom_video_writer_write_frame(writer, pkt->data.frame.buf,
147 pkt->data.frame.sz,
148 pkt->data.frame.pts)) {
149 die_codec(ecodec, "Failed to write compressed frame");
150 }
151 printf(keyframe ? "K" : ".");
152 fflush(stdout);
153 got_data = 1;
154
155 // Decode 1 frame.
156 if (test_decode) {
157 if (aom_codec_decode(dcodec, pkt->data.frame.buf,
158 (unsigned int)pkt->data.frame.sz, NULL))
159 die_codec(dcodec, "Failed to decode frame.");
160
161 // Copy out first decoded frame, and use it as reference later.
162 if (*frame_out == 1 && ext_ref != NULL)
163 if (aom_codec_control(dcodec, AV1_COPY_NEW_FRAME_IMAGE, ext_ref))
164 die_codec(dcodec, "Failed to get decoder new frame");
165 }
166 }
167 }
168
169 // Mismatch checking
170 if (got_data && test_decode) {
171 testing_decode(ecodec, dcodec, *frame_out, mismatch_seen);
172 }
173
174 return got_pkts;
175 }
176
main(int argc,char ** argv)177 int main(int argc, char **argv) {
178 FILE *infile = NULL;
179 // Encoder
180 aom_codec_ctx_t ecodec;
181 aom_codec_enc_cfg_t cfg;
182 unsigned int frame_in = 0;
183 aom_image_t raw;
184 aom_image_t raw_shift;
185 aom_image_t ext_ref;
186 aom_codec_err_t res;
187 AvxVideoInfo info;
188 AvxVideoWriter *writer = NULL;
189 int flags = 0;
190 int allocated_raw_shift = 0;
191 aom_img_fmt_t raw_fmt = AOM_IMG_FMT_I420;
192 aom_img_fmt_t ref_fmt = AOM_IMG_FMT_I420;
193
194 // Test encoder/decoder mismatch.
195 int test_decode = 1;
196 // Decoder
197 aom_codec_ctx_t dcodec;
198 unsigned int frame_out = 0;
199
200 // The frame number to set reference frame on
201 unsigned int update_frame_num = 0;
202 int mismatch_seen = 0;
203
204 const int fps = 30;
205 const int bitrate = 500;
206
207 const char *codec_arg = NULL;
208 const char *width_arg = NULL;
209 const char *height_arg = NULL;
210 const char *infile_arg = NULL;
211 const char *outfile_arg = NULL;
212 const char *update_frame_num_arg = NULL;
213 unsigned int limit = 0;
214 exec_name = argv[0];
215
216 // Clear explicitly, as simply assigning "{ 0 }" generates
217 // "missing-field-initializers" warning in some compilers.
218 memset(&ecodec, 0, sizeof(ecodec));
219 memset(&cfg, 0, sizeof(cfg));
220 memset(&info, 0, sizeof(info));
221
222 if (argc < 7) die("Invalid number of arguments");
223
224 codec_arg = argv[1];
225 width_arg = argv[2];
226 height_arg = argv[3];
227 infile_arg = argv[4];
228 outfile_arg = argv[5];
229 update_frame_num_arg = argv[6];
230
231 aom_codec_iface_t *encoder = get_aom_encoder_by_short_name(codec_arg);
232 if (!encoder) die("Unsupported codec.");
233
234 update_frame_num = (unsigned int)strtoul(update_frame_num_arg, NULL, 0);
235 // In AV1, the reference buffers (cm->buffer_pool->frame_bufs[i].buf) are
236 // allocated while calling aom_codec_encode(), thus, setting reference for
237 // 1st frame isn't supported.
238 if (update_frame_num <= 1) {
239 die("Couldn't parse frame number '%s'\n", update_frame_num_arg);
240 }
241
242 if (argc > 7) {
243 limit = (unsigned int)strtoul(argv[7], NULL, 0);
244 if (update_frame_num > limit)
245 die("Update frame number couldn't larger than limit\n");
246 }
247
248 info.codec_fourcc = get_fourcc_by_aom_encoder(encoder);
249 info.frame_width = (int)strtol(width_arg, NULL, 0);
250 info.frame_height = (int)strtol(height_arg, NULL, 0);
251 info.time_base.numerator = 1;
252 info.time_base.denominator = fps;
253
254 if (info.frame_width <= 0 || info.frame_height <= 0) {
255 die("Invalid frame size: %dx%d", info.frame_width, info.frame_height);
256 }
257
258 // In this test, the bit depth of input video is 8-bit, and the input format
259 // is AOM_IMG_FMT_I420.
260 if (!aom_img_alloc(&raw, raw_fmt, info.frame_width, info.frame_height, 32)) {
261 die("Failed to allocate image.");
262 }
263
264 if (FORCE_HIGHBITDEPTH_DECODING) ref_fmt |= AOM_IMG_FMT_HIGHBITDEPTH;
265 // Allocate memory with the border so that it can be used as a reference.
266 if (!aom_img_alloc_with_border(&ext_ref, ref_fmt, info.frame_width,
267 info.frame_height, 32, 8,
268 AOM_DEC_BORDER_IN_PIXELS)) {
269 die("Failed to allocate image.");
270 }
271
272 printf("Using %s\n", aom_codec_iface_name(encoder));
273
274 #if CONFIG_REALTIME_ONLY
275 res = aom_codec_enc_config_default(encoder, &cfg, 1);
276 #else
277 res = aom_codec_enc_config_default(encoder, &cfg, 0);
278 #endif
279 if (res) die_codec(&ecodec, "Failed to get default codec config.");
280
281 cfg.g_w = info.frame_width;
282 cfg.g_h = info.frame_height;
283 cfg.g_timebase.num = info.time_base.numerator;
284 cfg.g_timebase.den = info.time_base.denominator;
285 cfg.rc_target_bitrate = bitrate;
286 cfg.g_lag_in_frames = 3;
287 cfg.g_bit_depth = AOM_BITS_8;
288
289 flags |= (cfg.g_bit_depth > AOM_BITS_8 || FORCE_HIGHBITDEPTH_DECODING)
290 ? AOM_CODEC_USE_HIGHBITDEPTH
291 : 0;
292
293 writer = aom_video_writer_open(outfile_arg, kContainerIVF, &info);
294 if (!writer) die("Failed to open %s for writing.", outfile_arg);
295
296 if (!(infile = fopen(infile_arg, "rb")))
297 die("Failed to open %s for reading.", infile_arg);
298
299 if (aom_codec_enc_init(&ecodec, encoder, &cfg, flags))
300 die("Failed to initialize encoder");
301
302 // Disable alt_ref.
303 if (aom_codec_control(&ecodec, AOME_SET_ENABLEAUTOALTREF, 0))
304 die_codec(&ecodec, "Failed to set enable auto alt ref");
305
306 if (test_decode) {
307 aom_codec_iface_t *decoder = get_aom_decoder_by_short_name(codec_arg);
308 if (aom_codec_dec_init(&dcodec, decoder, NULL, 0))
309 die("Failed to initialize decoder.");
310 }
311
312 // Encode frames.
313 while (aom_img_read(&raw, infile)) {
314 if (limit && frame_in >= limit) break;
315 aom_image_t *frame_to_encode;
316
317 if (FORCE_HIGHBITDEPTH_DECODING) {
318 // Need to allocate larger buffer to use hbd internal.
319 int input_shift = 0;
320 if (!allocated_raw_shift) {
321 aom_img_alloc(&raw_shift, raw_fmt | AOM_IMG_FMT_HIGHBITDEPTH,
322 info.frame_width, info.frame_height, 32);
323 allocated_raw_shift = 1;
324 }
325 aom_img_upshift(&raw_shift, &raw, input_shift);
326 frame_to_encode = &raw_shift;
327 } else {
328 frame_to_encode = &raw;
329 }
330
331 if (update_frame_num > 1 && frame_out + 1 == update_frame_num) {
332 av1_ref_frame_t ref;
333 ref.idx = 0;
334 ref.use_external_ref = 0;
335 ref.img = ext_ref;
336 // Set reference frame in encoder.
337 if (aom_codec_control(&ecodec, AV1_SET_REFERENCE, &ref))
338 die_codec(&ecodec, "Failed to set encoder reference frame");
339 printf(" <SET_REF>");
340
341 #if CONFIG_REALTIME_ONLY
342 // Set cpu speed in encoder.
343 if (aom_codec_control(&ecodec, AOME_SET_CPUUSED, 7))
344 die_codec(&ecodec, "Failed to set cpu speed");
345 #endif
346
347 // If set_reference in decoder is commented out, the enc/dec mismatch
348 // would be seen.
349 if (test_decode) {
350 ref.use_external_ref = 1;
351 if (aom_codec_control(&dcodec, AV1_SET_REFERENCE, &ref))
352 die_codec(&dcodec, "Failed to set decoder reference frame");
353 }
354 }
355
356 encode_frame(&ecodec, frame_to_encode, frame_in, writer, test_decode,
357 &dcodec, &frame_out, &mismatch_seen, &ext_ref);
358 frame_in++;
359 if (mismatch_seen) break;
360 }
361
362 // Flush encoder.
363 if (!mismatch_seen)
364 while (encode_frame(&ecodec, NULL, frame_in, writer, test_decode, &dcodec,
365 &frame_out, &mismatch_seen, NULL)) {
366 }
367
368 printf("\n");
369 fclose(infile);
370 printf("Processed %u frames.\n", frame_out);
371
372 if (test_decode) {
373 if (!mismatch_seen)
374 printf("Encoder/decoder results are matching.\n");
375 else
376 printf("Encoder/decoder results are NOT matching.\n");
377 }
378
379 if (test_decode)
380 if (aom_codec_destroy(&dcodec))
381 die_codec(&dcodec, "Failed to destroy decoder");
382
383 if (allocated_raw_shift) aom_img_free(&raw_shift);
384 aom_img_free(&ext_ref);
385 aom_img_free(&raw);
386 if (aom_codec_destroy(&ecodec))
387 die_codec(&ecodec, "Failed to destroy encoder.");
388
389 aom_video_writer_close(writer);
390
391 return EXIT_SUCCESS;
392 }
393