2 * Interface to xvidcore for mpeg4 encoding
3 * Copyright (c) 2004 Adam Thayer <krevnik@comcast.net>
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
24 * Interface to xvidcore for MPEG-4 compliant encoding.
25 * @author Adam Thayer (krevnik@comcast.net)
28 /* needed for mkstemp() */
29 #define _XOPEN_SOURCE 600
34 #include "libavutil/cpu.h"
35 #include "libavutil/intreadwrite.h"
36 #include "libxvid_internal.h"
42 * Buffer management macros.
44 #define BUFFER_SIZE 1024
45 #define BUFFER_REMAINING(x) (BUFFER_SIZE - strlen(x))
46 #define BUFFER_CAT(x) (&((x)[strlen(x)]))
49 * Structure for the private Xvid context.
50 * This stores all the private context for the codec.
53 void *encoder_handle; /**< Handle for Xvid encoder */
54 int xsize; /**< Frame x size */
55 int ysize; /**< Frame y size */
56 int vop_flags; /**< VOP flags for Xvid encoder */
57 int vol_flags; /**< VOL flags for Xvid encoder */
58 int me_flags; /**< Motion Estimation flags */
59 int qscale; /**< Do we use constant scale? */
60 int quicktime_format; /**< Are we in a QT-based format? */
61 AVFrame encoded_picture; /**< Encoded frame information */
62 char *twopassbuffer; /**< Character buffer for two-pass */
63 char *old_twopassbuffer; /**< Old character buffer (two-pass) */
64 char *twopassfile; /**< second pass temp file name */
65 unsigned char *intra_matrix; /**< P-Frame Quant Matrix */
66 unsigned char *inter_matrix; /**< I-Frame Quant Matrix */
70 * Structure for the private first-pass plugin.
72 struct xvid_ff_pass1 {
73 int version; /**< Xvid version */
74 struct xvid_context *context; /**< Pointer to private context */
77 /* Prototypes - See function implementation for details */
78 int xvid_strip_vol_header(AVCodecContext *avctx, unsigned char *frame, unsigned int header_len, unsigned int frame_len);
79 int xvid_ff_2pass(void *ref, int opt, void *p1, void *p2);
80 void xvid_correct_framerate(AVCodecContext *avctx);
82 /* Wrapper to work around the lack of mkstemp() on mingw.
83 * Also, tries to create file in /tmp first, if possible.
84 * *prefix can be a character constant; *filename will be allocated internally.
85 * @return file descriptor of opened file (or -1 on error)
86 * and opened file name in **filename. */
87 int ff_tempfile(const char *prefix, char **filename) {
90 *filename = tempnam(".", prefix);
92 size_t len = strlen(prefix) + 12; /* room for "/tmp/" and "XXXXXX\0" */
93 *filename = av_malloc(len);
95 /* -----common section-----*/
96 if (*filename == NULL) {
97 av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot allocate file name\n");
101 fd = open(*filename, O_RDWR | O_BINARY | O_CREAT, 0444);
103 snprintf(*filename, len, "/tmp/%sXXXXXX", prefix);
104 fd = mkstemp(*filename);
106 snprintf(*filename, len, "./%sXXXXXX", prefix);
107 fd = mkstemp(*filename);
110 /* -----common section-----*/
112 av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot open temporary file %s\n", *filename);
115 return fd; /* success */
118 #if CONFIG_LIBXVID_ENCODER
121 * Create the private context for the encoder.
122 * All buffers are allocated, settings are loaded from the user,
123 * and the encoder context created.
125 * @param avctx AVCodecContext pointer to context
126 * @return Returns 0 on success, -1 on failure
128 static av_cold int xvid_encode_init(AVCodecContext *avctx) {
130 int xvid_flags = avctx->flags;
131 struct xvid_context *x = avctx->priv_data;
132 uint16_t *intra, *inter;
135 xvid_plugin_single_t single;
136 struct xvid_ff_pass1 rc2pass1;
137 xvid_plugin_2pass2_t rc2pass2;
138 xvid_gbl_init_t xvid_gbl_init;
139 xvid_enc_create_t xvid_enc_create;
140 xvid_enc_plugin_t plugins[7];
142 /* Bring in VOP flags from ffmpeg command-line */
143 x->vop_flags = XVID_VOP_HALFPEL; /* Bare minimum quality */
144 if( xvid_flags & CODEC_FLAG_4MV )
145 x->vop_flags |= XVID_VOP_INTER4V; /* Level 3 */
148 x->vop_flags |= XVID_VOP_TRELLISQUANT; /* Level 5 */
149 if( xvid_flags & CODEC_FLAG_AC_PRED )
150 x->vop_flags |= XVID_VOP_HQACPRED; /* Level 6 */
151 if( xvid_flags & CODEC_FLAG_GRAY )
152 x->vop_flags |= XVID_VOP_GREYSCALE;
154 /* Decide which ME quality setting to use */
156 switch( avctx->me_method ) {
157 case ME_FULL: /* Quality 6 */
158 x->me_flags |= XVID_ME_EXTSEARCH16
159 | XVID_ME_EXTSEARCH8;
161 case ME_EPZS: /* Quality 4 */
162 x->me_flags |= XVID_ME_ADVANCEDDIAMOND8
163 | XVID_ME_HALFPELREFINE8
164 | XVID_ME_CHROMA_PVOP
165 | XVID_ME_CHROMA_BVOP;
167 case ME_LOG: /* Quality 2 */
170 x->me_flags |= XVID_ME_ADVANCEDDIAMOND16
171 | XVID_ME_HALFPELREFINE16;
173 case ME_ZERO: /* Quality 0 */
178 /* Decide how we should decide blocks */
179 switch( avctx->mb_decision ) {
181 x->vop_flags |= XVID_VOP_MODEDECISION_RD;
182 x->me_flags |= XVID_ME_HALFPELREFINE8_RD
183 | XVID_ME_QUARTERPELREFINE8_RD
184 | XVID_ME_EXTSEARCH_RD
185 | XVID_ME_CHECKPREDICTION_RD;
187 if( !(x->vop_flags & XVID_VOP_MODEDECISION_RD) )
188 x->vop_flags |= XVID_VOP_FAST_MODEDECISION_RD;
189 x->me_flags |= XVID_ME_HALFPELREFINE16_RD
190 | XVID_ME_QUARTERPELREFINE16_RD;
196 /* Bring in VOL flags from ffmpeg command-line */
198 if( xvid_flags & CODEC_FLAG_GMC ) {
199 x->vol_flags |= XVID_VOL_GMC;
200 x->me_flags |= XVID_ME_GME_REFINE;
202 if( xvid_flags & CODEC_FLAG_QPEL ) {
203 x->vol_flags |= XVID_VOL_QUARTERPEL;
204 x->me_flags |= XVID_ME_QUARTERPELREFINE16;
205 if( x->vop_flags & XVID_VOP_INTER4V )
206 x->me_flags |= XVID_ME_QUARTERPELREFINE8;
209 memset(&xvid_gbl_init, 0, sizeof(xvid_gbl_init));
210 xvid_gbl_init.version = XVID_VERSION;
211 xvid_gbl_init.debug = 0;
214 /* Xvid's PPC support is borked, use libavcodec to detect */
216 if (av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC) {
217 xvid_gbl_init.cpu_flags = XVID_CPU_FORCE | XVID_CPU_ALTIVEC;
220 xvid_gbl_init.cpu_flags = XVID_CPU_FORCE;
222 /* Xvid can detect on x86 */
223 xvid_gbl_init.cpu_flags = 0;
227 xvid_global(NULL, XVID_GBL_INIT, &xvid_gbl_init, NULL);
229 /* Create the encoder reference */
230 memset(&xvid_enc_create, 0, sizeof(xvid_enc_create));
231 xvid_enc_create.version = XVID_VERSION;
233 /* Store the desired frame size */
234 xvid_enc_create.width = x->xsize = avctx->width;
235 xvid_enc_create.height = x->ysize = avctx->height;
237 /* Xvid can determine the proper profile to use */
238 /* xvid_enc_create.profile = XVID_PROFILE_S_L3; */
240 /* We don't use zones */
241 xvid_enc_create.zones = NULL;
242 xvid_enc_create.num_zones = 0;
244 xvid_enc_create.num_threads = avctx->thread_count;
246 xvid_enc_create.plugins = plugins;
247 xvid_enc_create.num_plugins = 0;
249 /* Initialize Buffers */
250 x->twopassbuffer = NULL;
251 x->old_twopassbuffer = NULL;
252 x->twopassfile = NULL;
254 if( xvid_flags & CODEC_FLAG_PASS1 ) {
255 memset(&rc2pass1, 0, sizeof(struct xvid_ff_pass1));
256 rc2pass1.version = XVID_VERSION;
257 rc2pass1.context = x;
258 x->twopassbuffer = av_malloc(BUFFER_SIZE);
259 x->old_twopassbuffer = av_malloc(BUFFER_SIZE);
260 if( x->twopassbuffer == NULL || x->old_twopassbuffer == NULL ) {
261 av_log(avctx, AV_LOG_ERROR,
262 "Xvid: Cannot allocate 2-pass log buffers\n");
265 x->twopassbuffer[0] = x->old_twopassbuffer[0] = 0;
267 plugins[xvid_enc_create.num_plugins].func = xvid_ff_2pass;
268 plugins[xvid_enc_create.num_plugins].param = &rc2pass1;
269 xvid_enc_create.num_plugins++;
270 } else if( xvid_flags & CODEC_FLAG_PASS2 ) {
271 memset(&rc2pass2, 0, sizeof(xvid_plugin_2pass2_t));
272 rc2pass2.version = XVID_VERSION;
273 rc2pass2.bitrate = avctx->bit_rate;
275 fd = ff_tempfile("xvidff.", &(x->twopassfile));
277 av_log(avctx, AV_LOG_ERROR,
278 "Xvid: Cannot write 2-pass pipe\n");
282 if( avctx->stats_in == NULL ) {
283 av_log(avctx, AV_LOG_ERROR,
284 "Xvid: No 2-pass information loaded for second pass\n");
288 if( strlen(avctx->stats_in) >
289 write(fd, avctx->stats_in, strlen(avctx->stats_in)) ) {
291 av_log(avctx, AV_LOG_ERROR,
292 "Xvid: Cannot write to 2-pass pipe\n");
297 rc2pass2.filename = x->twopassfile;
298 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_2pass2;
299 plugins[xvid_enc_create.num_plugins].param = &rc2pass2;
300 xvid_enc_create.num_plugins++;
301 } else if( !(xvid_flags & CODEC_FLAG_QSCALE) ) {
302 /* Single Pass Bitrate Control! */
303 memset(&single, 0, sizeof(xvid_plugin_single_t));
304 single.version = XVID_VERSION;
305 single.bitrate = avctx->bit_rate;
307 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_single;
308 plugins[xvid_enc_create.num_plugins].param = &single;
309 xvid_enc_create.num_plugins++;
312 /* Luminance Masking */
313 if( 0.0 != avctx->lumi_masking ) {
314 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_lumimasking;
315 plugins[xvid_enc_create.num_plugins].param = NULL;
316 xvid_enc_create.num_plugins++;
319 /* Frame Rate and Key Frames */
320 xvid_correct_framerate(avctx);
321 xvid_enc_create.fincr = avctx->time_base.num;
322 xvid_enc_create.fbase = avctx->time_base.den;
323 if( avctx->gop_size > 0 )
324 xvid_enc_create.max_key_interval = avctx->gop_size;
326 xvid_enc_create.max_key_interval = 240; /* Xvid's best default */
329 if( xvid_flags & CODEC_FLAG_QSCALE ) x->qscale = 1;
332 xvid_enc_create.min_quant[0] = avctx->qmin;
333 xvid_enc_create.min_quant[1] = avctx->qmin;
334 xvid_enc_create.min_quant[2] = avctx->qmin;
335 xvid_enc_create.max_quant[0] = avctx->qmax;
336 xvid_enc_create.max_quant[1] = avctx->qmax;
337 xvid_enc_create.max_quant[2] = avctx->qmax;
340 x->intra_matrix = x->inter_matrix = NULL;
341 if( avctx->mpeg_quant )
342 x->vol_flags |= XVID_VOL_MPEGQUANT;
343 if( (avctx->intra_matrix || avctx->inter_matrix) ) {
344 x->vol_flags |= XVID_VOL_MPEGQUANT;
346 if( avctx->intra_matrix ) {
347 intra = avctx->intra_matrix;
348 x->intra_matrix = av_malloc(sizeof(unsigned char) * 64);
351 if( avctx->inter_matrix ) {
352 inter = avctx->inter_matrix;
353 x->inter_matrix = av_malloc(sizeof(unsigned char) * 64);
357 for( i = 0; i < 64; i++ ) {
359 x->intra_matrix[i] = (unsigned char)intra[i];
361 x->inter_matrix[i] = (unsigned char)inter[i];
366 xvid_enc_create.frame_drop_ratio = 0;
367 xvid_enc_create.global = 0;
368 if( xvid_flags & CODEC_FLAG_CLOSED_GOP )
369 xvid_enc_create.global |= XVID_GLOBAL_CLOSED_GOP;
371 /* Determines which codec mode we are operating in */
372 avctx->extradata = NULL;
373 avctx->extradata_size = 0;
374 if( xvid_flags & CODEC_FLAG_GLOBAL_HEADER ) {
375 /* In this case, we are claiming to be MPEG4 */
376 x->quicktime_format = 1;
377 avctx->codec_id = CODEC_ID_MPEG4;
379 /* We are claiming to be Xvid */
380 x->quicktime_format = 0;
381 if(!avctx->codec_tag)
382 avctx->codec_tag = AV_RL32("xvid");
386 xvid_enc_create.max_bframes = avctx->max_b_frames;
387 xvid_enc_create.bquant_offset = 100 * avctx->b_quant_offset;
388 xvid_enc_create.bquant_ratio = 100 * avctx->b_quant_factor;
389 if( avctx->max_b_frames > 0 && !x->quicktime_format ) xvid_enc_create.global |= XVID_GLOBAL_PACKED;
391 /* Create encoder context */
392 xerr = xvid_encore(NULL, XVID_ENC_CREATE, &xvid_enc_create, NULL);
394 av_log(avctx, AV_LOG_ERROR, "Xvid: Could not create encoder reference\n");
398 x->encoder_handle = xvid_enc_create.handle;
399 avctx->coded_frame = &x->encoded_picture;
405 * Encode a single frame.
407 * @param avctx AVCodecContext pointer to context
408 * @param frame Pointer to encoded frame buffer
409 * @param buf_size Size of encoded frame buffer
410 * @param data Pointer to AVFrame of unencoded frame
411 * @return Returns 0 on success, -1 on failure
413 static int xvid_encode_frame(AVCodecContext *avctx,
414 unsigned char *frame, int buf_size, void *data) {
417 struct xvid_context *x = avctx->priv_data;
418 AVFrame *picture = data;
419 AVFrame *p = &(x->encoded_picture);
421 xvid_enc_frame_t xvid_enc_frame;
422 xvid_enc_stats_t xvid_enc_stats;
424 /* Start setting up the frame */
425 memset(&xvid_enc_frame, 0, sizeof(xvid_enc_frame));
426 xvid_enc_frame.version = XVID_VERSION;
427 memset(&xvid_enc_stats, 0, sizeof(xvid_enc_stats));
428 xvid_enc_stats.version = XVID_VERSION;
431 /* Let Xvid know where to put the frame. */
432 xvid_enc_frame.bitstream = frame;
433 xvid_enc_frame.length = buf_size;
435 /* Initialize input image fields */
436 if( avctx->pix_fmt != PIX_FMT_YUV420P ) {
437 av_log(avctx, AV_LOG_ERROR, "Xvid: Color spaces other than 420p not supported\n");
441 xvid_enc_frame.input.csp = XVID_CSP_PLANAR; /* YUV420P */
443 for( i = 0; i < 4; i++ ) {
444 xvid_enc_frame.input.plane[i] = picture->data[i];
445 xvid_enc_frame.input.stride[i] = picture->linesize[i];
449 xvid_enc_frame.vop_flags = x->vop_flags;
450 xvid_enc_frame.vol_flags = x->vol_flags;
451 xvid_enc_frame.motion = x->me_flags;
452 xvid_enc_frame.type =
453 picture->pict_type == FF_I_TYPE ? XVID_TYPE_IVOP :
454 picture->pict_type == FF_P_TYPE ? XVID_TYPE_PVOP :
455 picture->pict_type == FF_B_TYPE ? XVID_TYPE_BVOP :
458 /* Pixel aspect ratio setting */
459 if (avctx->sample_aspect_ratio.num < 1 || avctx->sample_aspect_ratio.num > 255 ||
460 avctx->sample_aspect_ratio.den < 1 || avctx->sample_aspect_ratio.den > 255) {
461 av_log(avctx, AV_LOG_ERROR, "Invalid pixel aspect ratio %i/%i\n",
462 avctx->sample_aspect_ratio.num, avctx->sample_aspect_ratio.den);
465 xvid_enc_frame.par = XVID_PAR_EXT;
466 xvid_enc_frame.par_width = avctx->sample_aspect_ratio.num;
467 xvid_enc_frame.par_height = avctx->sample_aspect_ratio.den;
470 if( x->qscale ) xvid_enc_frame.quant = picture->quality / FF_QP2LAMBDA;
471 else xvid_enc_frame.quant = 0;
474 xvid_enc_frame.quant_intra_matrix = x->intra_matrix;
475 xvid_enc_frame.quant_inter_matrix = x->inter_matrix;
478 xerr = xvid_encore(x->encoder_handle, XVID_ENC_ENCODE,
479 &xvid_enc_frame, &xvid_enc_stats);
481 /* Two-pass log buffer swapping */
482 avctx->stats_out = NULL;
483 if( x->twopassbuffer ) {
484 tmp = x->old_twopassbuffer;
485 x->old_twopassbuffer = x->twopassbuffer;
486 x->twopassbuffer = tmp;
487 x->twopassbuffer[0] = 0;
488 if( x->old_twopassbuffer[0] != 0 ) {
489 avctx->stats_out = x->old_twopassbuffer;
494 p->quality = xvid_enc_stats.quant * FF_QP2LAMBDA;
495 if( xvid_enc_stats.type == XVID_TYPE_PVOP )
496 p->pict_type = FF_P_TYPE;
497 else if( xvid_enc_stats.type == XVID_TYPE_BVOP )
498 p->pict_type = FF_B_TYPE;
499 else if( xvid_enc_stats.type == XVID_TYPE_SVOP )
500 p->pict_type = FF_S_TYPE;
502 p->pict_type = FF_I_TYPE;
503 if( xvid_enc_frame.out_flags & XVID_KEYFRAME ) {
505 if( x->quicktime_format )
506 return xvid_strip_vol_header(avctx, frame,
507 xvid_enc_stats.hlength, xerr);
513 av_log(avctx, AV_LOG_ERROR, "Xvid: Encoding Error Occurred: %i\n", xerr);
519 * Destroy the private context for the encoder.
520 * All buffers are freed, and the Xvid encoder context is destroyed.
522 * @param avctx AVCodecContext pointer to context
523 * @return Returns 0, success guaranteed
525 static av_cold int xvid_encode_close(AVCodecContext *avctx) {
526 struct xvid_context *x = avctx->priv_data;
528 xvid_encore(x->encoder_handle, XVID_ENC_DESTROY, NULL, NULL);
530 if( avctx->extradata != NULL )
531 av_freep(&avctx->extradata);
532 if( x->twopassbuffer != NULL ) {
533 av_free(x->twopassbuffer);
534 av_free(x->old_twopassbuffer);
536 if( x->twopassfile != NULL )
537 av_free(x->twopassfile);
538 if( x->intra_matrix != NULL )
539 av_free(x->intra_matrix);
540 if( x->inter_matrix != NULL )
541 av_free(x->inter_matrix);
547 * Routine to create a global VO/VOL header for MP4 container.
548 * What we do here is extract the header from the Xvid bitstream
549 * as it is encoded. We also strip the repeated headers from the
550 * bitstream when a global header is requested for MPEG-4 ISO
553 * @param avctx AVCodecContext pointer to context
554 * @param frame Pointer to encoded frame data
555 * @param header_len Length of header to search
556 * @param frame_len Length of encoded frame data
557 * @return Returns new length of frame data
559 int xvid_strip_vol_header(AVCodecContext *avctx,
560 unsigned char *frame,
561 unsigned int header_len,
562 unsigned int frame_len) {
565 for( i = 0; i < header_len - 3; i++ ) {
566 if( frame[i] == 0x00 &&
567 frame[i+1] == 0x00 &&
568 frame[i+2] == 0x01 &&
569 frame[i+3] == 0xB6 ) {
576 /* We need to store the header, so extract it */
577 if( avctx->extradata == NULL ) {
578 avctx->extradata = av_malloc(vo_len);
579 memcpy(avctx->extradata, frame, vo_len);
580 avctx->extradata_size = vo_len;
582 /* Less dangerous now, memmove properly copies the two
583 chunks of overlapping data */
584 memmove(frame, &(frame[vo_len]), frame_len - vo_len);
585 return frame_len - vo_len;
591 * Routine to correct a possibly erroneous framerate being fed to us.
592 * Xvid currently chokes on framerates where the ticks per frame is
593 * extremely large. This function works to correct problems in this area
594 * by estimating a new framerate and taking the simpler fraction of
597 * @param avctx Context that contains the framerate to correct.
599 void xvid_correct_framerate(AVCodecContext *avctx) {
601 int est_frate, est_fbase;
605 frate = avctx->time_base.den;
606 fbase = avctx->time_base.num;
608 gcd = av_gcd(frate, fbase);
614 if( frate <= 65000 && fbase <= 65000 ) {
615 avctx->time_base.den = frate;
616 avctx->time_base.num = fbase;
620 fps = (float)frate / (float)fbase;
621 est_fps = roundf(fps * 1000.0) / 1000.0;
623 est_frate = (int)est_fps;
624 if( est_fps > (int)est_fps ) {
625 est_frate = (est_frate + 1) * 1000;
626 est_fbase = (int)roundf((float)est_frate / est_fps);
630 gcd = av_gcd(est_frate, est_fbase);
636 if( fbase > est_fbase ) {
637 avctx->time_base.den = est_frate;
638 avctx->time_base.num = est_fbase;
639 av_log(avctx, AV_LOG_DEBUG,
640 "Xvid: framerate re-estimated: %.2f, %.3f%% correction\n",
641 est_fps, (((est_fps - fps)/fps) * 100.0));
643 avctx->time_base.den = frate;
644 avctx->time_base.num = fbase;
649 * Xvid 2-Pass Kludge Section
651 * Xvid's default 2-pass doesn't allow us to create data as we need to, so
652 * this section spends time replacing the first pass plugin so we can write
653 * statistic information as libavcodec requests in. We have another kludge
654 * that allows us to pass data to the second pass in Xvid without a custom
655 * rate-control plugin.
659 * Initialize the two-pass plugin and context.
661 * @param param Input construction parameter structure
662 * @param handle Private context handle
663 * @return Returns XVID_ERR_xxxx on failure, or 0 on success.
665 static int xvid_ff_2pass_create(xvid_plg_create_t * param,
667 struct xvid_ff_pass1 *x = (struct xvid_ff_pass1 *)param->param;
668 char *log = x->context->twopassbuffer;
670 /* Do a quick bounds check */
672 return XVID_ERR_FAIL;
674 /* We use snprintf() */
675 /* This is because we can safely prevent a buffer overflow */
677 snprintf(log, BUFFER_REMAINING(log),
678 "# ffmpeg 2-pass log file, using xvid codec\n");
679 snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log),
680 "# Do not modify. libxvidcore version: %d.%d.%d\n\n",
681 XVID_VERSION_MAJOR(XVID_VERSION),
682 XVID_VERSION_MINOR(XVID_VERSION),
683 XVID_VERSION_PATCH(XVID_VERSION));
685 *handle = x->context;
690 * Destroy the two-pass plugin context.
692 * @param ref Context pointer for the plugin
693 * @param param Destrooy context
694 * @return Returns 0, success guaranteed
696 static int xvid_ff_2pass_destroy(struct xvid_context *ref,
697 xvid_plg_destroy_t *param) {
698 /* Currently cannot think of anything to do on destruction */
699 /* Still, the framework should be here for reference/use */
700 if( ref->twopassbuffer != NULL )
701 ref->twopassbuffer[0] = 0;
706 * Enable fast encode mode during the first pass.
708 * @param ref Context pointer for the plugin
709 * @param param Frame data
710 * @return Returns 0, success guaranteed
712 static int xvid_ff_2pass_before(struct xvid_context *ref,
713 xvid_plg_data_t *param) {
715 int motion_replacements;
718 /* Nothing to do here, result is changed too much */
719 if( param->zone && param->zone->mode == XVID_ZONE_QUANT )
722 /* We can implement a 'turbo' first pass mode here */
726 motion_remove = ~XVID_ME_CHROMA_PVOP &
727 ~XVID_ME_CHROMA_BVOP &
728 ~XVID_ME_EXTSEARCH16 &
729 ~XVID_ME_ADVANCEDDIAMOND16;
730 motion_replacements = XVID_ME_FAST_MODEINTERPOLATE |
731 XVID_ME_SKIP_DELTASEARCH |
732 XVID_ME_FASTREFINE16 |
733 XVID_ME_BFRAME_EARLYSTOP;
734 vop_remove = ~XVID_VOP_MODEDECISION_RD &
735 ~XVID_VOP_FAST_MODEDECISION_RD &
736 ~XVID_VOP_TRELLISQUANT &
740 param->vol_flags &= ~XVID_VOL_GMC;
741 param->vop_flags &= vop_remove;
742 param->motion_flags &= motion_remove;
743 param->motion_flags |= motion_replacements;
749 * Capture statistic data and write it during first pass.
751 * @param ref Context pointer for the plugin
752 * @param param Statistic data
753 * @return Returns XVID_ERR_xxxx on failure, or 0 on success
755 static int xvid_ff_2pass_after(struct xvid_context *ref,
756 xvid_plg_data_t *param) {
757 char *log = ref->twopassbuffer;
758 char *frame_types = " ipbs";
761 /* Quick bounds check */
763 return XVID_ERR_FAIL;
765 /* Convert the type given to us into a character */
766 if( param->type < 5 && param->type > 0 ) {
767 frame_type = frame_types[param->type];
769 return XVID_ERR_FAIL;
772 snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log),
773 "%c %d %d %d %d %d %d\n",
774 frame_type, param->stats.quant, param->stats.kblks, param->stats.mblks,
775 param->stats.ublks, param->stats.length, param->stats.hlength);
781 * Dispatch function for our custom plugin.
782 * This handles the dispatch for the Xvid plugin. It passes data
783 * on to other functions for actual processing.
785 * @param ref Context pointer for the plugin
786 * @param cmd The task given for us to complete
787 * @param p1 First parameter (varies)
788 * @param p2 Second parameter (varies)
789 * @return Returns XVID_ERR_xxxx on failure, or 0 on success
791 int xvid_ff_2pass(void *ref, int cmd, void *p1, void *p2) {
797 case XVID_PLG_BEFORE:
798 return xvid_ff_2pass_before(ref, p1);
800 case XVID_PLG_CREATE:
801 return xvid_ff_2pass_create(p1, p2);
804 return xvid_ff_2pass_after(ref, p1);
806 case XVID_PLG_DESTROY:
807 return xvid_ff_2pass_destroy(ref, p1);
810 return XVID_ERR_FAIL;
815 * Xvid codec definition for libavcodec.
817 AVCodec libxvid_encoder = {
821 sizeof(struct xvid_context),
825 .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
826 .long_name= NULL_IF_CONFIG_SMALL("libxvidcore MPEG-4 part 2"),
829 #endif /* CONFIG_LIBXVID_ENCODER */