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)
31 #include "libavutil/cpu.h"
32 #include "libavutil/intreadwrite.h"
33 #include "libxvid_internal.h"
39 * Buffer management macros.
41 #define BUFFER_SIZE 1024
42 #define BUFFER_REMAINING(x) (BUFFER_SIZE - strlen(x))
43 #define BUFFER_CAT(x) (&((x)[strlen(x)]))
46 * Structure for the private Xvid context.
47 * This stores all the private context for the codec.
50 void *encoder_handle; /**< Handle for Xvid encoder */
51 int xsize; /**< Frame x size */
52 int ysize; /**< Frame y size */
53 int vop_flags; /**< VOP flags for Xvid encoder */
54 int vol_flags; /**< VOL flags for Xvid encoder */
55 int me_flags; /**< Motion Estimation flags */
56 int qscale; /**< Do we use constant scale? */
57 int quicktime_format; /**< Are we in a QT-based format? */
58 AVFrame encoded_picture; /**< Encoded frame information */
59 char *twopassbuffer; /**< Character buffer for two-pass */
60 char *old_twopassbuffer; /**< Old character buffer (two-pass) */
61 char *twopassfile; /**< second pass temp file name */
62 unsigned char *intra_matrix; /**< P-Frame Quant Matrix */
63 unsigned char *inter_matrix; /**< I-Frame Quant Matrix */
67 * Structure for the private first-pass plugin.
69 struct xvid_ff_pass1 {
70 int version; /**< Xvid version */
71 struct xvid_context *context; /**< Pointer to private context */
74 /* Prototypes - See function implementation for details */
75 int xvid_strip_vol_header(AVCodecContext *avctx, unsigned char *frame, unsigned int header_len, unsigned int frame_len);
76 int xvid_ff_2pass(void *ref, int opt, void *p1, void *p2);
77 void xvid_correct_framerate(AVCodecContext *avctx);
79 /* Wrapper to work around the lack of mkstemp() on mingw.
80 * Also, tries to create file in /tmp first, if possible.
81 * *prefix can be a character constant; *filename will be allocated internally.
82 * @return file descriptor of opened file (or -1 on error)
83 * and opened file name in **filename. */
84 int ff_tempfile(const char *prefix, char **filename) {
87 *filename = tempnam(".", prefix);
89 size_t len = strlen(prefix) + 12; /* room for "/tmp/" and "XXXXXX\0" */
90 *filename = av_malloc(len);
92 /* -----common section-----*/
93 if (*filename == NULL) {
94 av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot allocate file name\n");
98 fd = open(*filename, O_RDWR | O_BINARY | O_CREAT, 0444);
100 snprintf(*filename, len, "/tmp/%sXXXXXX", prefix);
101 fd = mkstemp(*filename);
103 snprintf(*filename, len, "./%sXXXXXX", prefix);
104 fd = mkstemp(*filename);
107 /* -----common section-----*/
109 av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot open temporary file %s\n", *filename);
112 return fd; /* success */
115 #if CONFIG_LIBXVID_ENCODER
118 * Create the private context for the encoder.
119 * All buffers are allocated, settings are loaded from the user,
120 * and the encoder context created.
122 * @param avctx AVCodecContext pointer to context
123 * @return Returns 0 on success, -1 on failure
125 static av_cold int xvid_encode_init(AVCodecContext *avctx) {
127 int xvid_flags = avctx->flags;
128 struct xvid_context *x = avctx->priv_data;
129 uint16_t *intra, *inter;
132 xvid_plugin_single_t single;
133 struct xvid_ff_pass1 rc2pass1;
134 xvid_plugin_2pass2_t rc2pass2;
135 xvid_gbl_init_t xvid_gbl_init;
136 xvid_enc_create_t xvid_enc_create;
137 xvid_enc_plugin_t plugins[7];
139 /* Bring in VOP flags from ffmpeg command-line */
140 x->vop_flags = XVID_VOP_HALFPEL; /* Bare minimum quality */
141 if( xvid_flags & CODEC_FLAG_4MV )
142 x->vop_flags |= XVID_VOP_INTER4V; /* Level 3 */
145 x->vop_flags |= XVID_VOP_TRELLISQUANT; /* Level 5 */
146 if( xvid_flags & CODEC_FLAG_AC_PRED )
147 x->vop_flags |= XVID_VOP_HQACPRED; /* Level 6 */
148 if( xvid_flags & CODEC_FLAG_GRAY )
149 x->vop_flags |= XVID_VOP_GREYSCALE;
151 /* Decide which ME quality setting to use */
153 switch( avctx->me_method ) {
154 case ME_FULL: /* Quality 6 */
155 x->me_flags |= XVID_ME_EXTSEARCH16
156 | XVID_ME_EXTSEARCH8;
158 case ME_EPZS: /* Quality 4 */
159 x->me_flags |= XVID_ME_ADVANCEDDIAMOND8
160 | XVID_ME_HALFPELREFINE8
161 | XVID_ME_CHROMA_PVOP
162 | XVID_ME_CHROMA_BVOP;
164 case ME_LOG: /* Quality 2 */
167 x->me_flags |= XVID_ME_ADVANCEDDIAMOND16
168 | XVID_ME_HALFPELREFINE16;
170 case ME_ZERO: /* Quality 0 */
175 /* Decide how we should decide blocks */
176 switch( avctx->mb_decision ) {
178 x->vop_flags |= XVID_VOP_MODEDECISION_RD;
179 x->me_flags |= XVID_ME_HALFPELREFINE8_RD
180 | XVID_ME_QUARTERPELREFINE8_RD
181 | XVID_ME_EXTSEARCH_RD
182 | XVID_ME_CHECKPREDICTION_RD;
184 if( !(x->vop_flags & XVID_VOP_MODEDECISION_RD) )
185 x->vop_flags |= XVID_VOP_FAST_MODEDECISION_RD;
186 x->me_flags |= XVID_ME_HALFPELREFINE16_RD
187 | XVID_ME_QUARTERPELREFINE16_RD;
193 /* Bring in VOL flags from ffmpeg command-line */
195 if( xvid_flags & CODEC_FLAG_GMC ) {
196 x->vol_flags |= XVID_VOL_GMC;
197 x->me_flags |= XVID_ME_GME_REFINE;
199 if( xvid_flags & CODEC_FLAG_QPEL ) {
200 x->vol_flags |= XVID_VOL_QUARTERPEL;
201 x->me_flags |= XVID_ME_QUARTERPELREFINE16;
202 if( x->vop_flags & XVID_VOP_INTER4V )
203 x->me_flags |= XVID_ME_QUARTERPELREFINE8;
206 memset(&xvid_gbl_init, 0, sizeof(xvid_gbl_init));
207 xvid_gbl_init.version = XVID_VERSION;
208 xvid_gbl_init.debug = 0;
211 /* Xvid's PPC support is borked, use libavcodec to detect */
213 if (av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC) {
214 xvid_gbl_init.cpu_flags = XVID_CPU_FORCE | XVID_CPU_ALTIVEC;
217 xvid_gbl_init.cpu_flags = XVID_CPU_FORCE;
219 /* Xvid can detect on x86 */
220 xvid_gbl_init.cpu_flags = 0;
224 xvid_global(NULL, XVID_GBL_INIT, &xvid_gbl_init, NULL);
226 /* Create the encoder reference */
227 memset(&xvid_enc_create, 0, sizeof(xvid_enc_create));
228 xvid_enc_create.version = XVID_VERSION;
230 /* Store the desired frame size */
231 xvid_enc_create.width = x->xsize = avctx->width;
232 xvid_enc_create.height = x->ysize = avctx->height;
234 /* Xvid can determine the proper profile to use */
235 /* xvid_enc_create.profile = XVID_PROFILE_S_L3; */
237 /* We don't use zones */
238 xvid_enc_create.zones = NULL;
239 xvid_enc_create.num_zones = 0;
241 xvid_enc_create.num_threads = avctx->thread_count;
243 xvid_enc_create.plugins = plugins;
244 xvid_enc_create.num_plugins = 0;
246 /* Initialize Buffers */
247 x->twopassbuffer = NULL;
248 x->old_twopassbuffer = NULL;
249 x->twopassfile = NULL;
251 if( xvid_flags & CODEC_FLAG_PASS1 ) {
252 memset(&rc2pass1, 0, sizeof(struct xvid_ff_pass1));
253 rc2pass1.version = XVID_VERSION;
254 rc2pass1.context = x;
255 x->twopassbuffer = av_malloc(BUFFER_SIZE);
256 x->old_twopassbuffer = av_malloc(BUFFER_SIZE);
257 if( x->twopassbuffer == NULL || x->old_twopassbuffer == NULL ) {
258 av_log(avctx, AV_LOG_ERROR,
259 "Xvid: Cannot allocate 2-pass log buffers\n");
262 x->twopassbuffer[0] = x->old_twopassbuffer[0] = 0;
264 plugins[xvid_enc_create.num_plugins].func = xvid_ff_2pass;
265 plugins[xvid_enc_create.num_plugins].param = &rc2pass1;
266 xvid_enc_create.num_plugins++;
267 } else if( xvid_flags & CODEC_FLAG_PASS2 ) {
268 memset(&rc2pass2, 0, sizeof(xvid_plugin_2pass2_t));
269 rc2pass2.version = XVID_VERSION;
270 rc2pass2.bitrate = avctx->bit_rate;
272 fd = ff_tempfile("xvidff.", &(x->twopassfile));
274 av_log(avctx, AV_LOG_ERROR,
275 "Xvid: Cannot write 2-pass pipe\n");
279 if( avctx->stats_in == NULL ) {
280 av_log(avctx, AV_LOG_ERROR,
281 "Xvid: No 2-pass information loaded for second pass\n");
285 if( strlen(avctx->stats_in) >
286 write(fd, avctx->stats_in, strlen(avctx->stats_in)) ) {
288 av_log(avctx, AV_LOG_ERROR,
289 "Xvid: Cannot write to 2-pass pipe\n");
294 rc2pass2.filename = x->twopassfile;
295 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_2pass2;
296 plugins[xvid_enc_create.num_plugins].param = &rc2pass2;
297 xvid_enc_create.num_plugins++;
298 } else if( !(xvid_flags & CODEC_FLAG_QSCALE) ) {
299 /* Single Pass Bitrate Control! */
300 memset(&single, 0, sizeof(xvid_plugin_single_t));
301 single.version = XVID_VERSION;
302 single.bitrate = avctx->bit_rate;
304 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_single;
305 plugins[xvid_enc_create.num_plugins].param = &single;
306 xvid_enc_create.num_plugins++;
309 /* Luminance Masking */
310 if( 0.0 != avctx->lumi_masking ) {
311 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_lumimasking;
312 plugins[xvid_enc_create.num_plugins].param = NULL;
313 xvid_enc_create.num_plugins++;
316 /* Frame Rate and Key Frames */
317 xvid_correct_framerate(avctx);
318 xvid_enc_create.fincr = avctx->time_base.num;
319 xvid_enc_create.fbase = avctx->time_base.den;
320 if( avctx->gop_size > 0 )
321 xvid_enc_create.max_key_interval = avctx->gop_size;
323 xvid_enc_create.max_key_interval = 240; /* Xvid's best default */
326 if( xvid_flags & CODEC_FLAG_QSCALE ) x->qscale = 1;
329 xvid_enc_create.min_quant[0] = avctx->qmin;
330 xvid_enc_create.min_quant[1] = avctx->qmin;
331 xvid_enc_create.min_quant[2] = avctx->qmin;
332 xvid_enc_create.max_quant[0] = avctx->qmax;
333 xvid_enc_create.max_quant[1] = avctx->qmax;
334 xvid_enc_create.max_quant[2] = avctx->qmax;
337 x->intra_matrix = x->inter_matrix = NULL;
338 if( avctx->mpeg_quant )
339 x->vol_flags |= XVID_VOL_MPEGQUANT;
340 if( (avctx->intra_matrix || avctx->inter_matrix) ) {
341 x->vol_flags |= XVID_VOL_MPEGQUANT;
343 if( avctx->intra_matrix ) {
344 intra = avctx->intra_matrix;
345 x->intra_matrix = av_malloc(sizeof(unsigned char) * 64);
348 if( avctx->inter_matrix ) {
349 inter = avctx->inter_matrix;
350 x->inter_matrix = av_malloc(sizeof(unsigned char) * 64);
354 for( i = 0; i < 64; i++ ) {
356 x->intra_matrix[i] = (unsigned char)intra[i];
358 x->inter_matrix[i] = (unsigned char)inter[i];
363 xvid_enc_create.frame_drop_ratio = 0;
364 xvid_enc_create.global = 0;
365 if( xvid_flags & CODEC_FLAG_CLOSED_GOP )
366 xvid_enc_create.global |= XVID_GLOBAL_CLOSED_GOP;
368 /* Determines which codec mode we are operating in */
369 avctx->extradata = NULL;
370 avctx->extradata_size = 0;
371 if( xvid_flags & CODEC_FLAG_GLOBAL_HEADER ) {
372 /* In this case, we are claiming to be MPEG4 */
373 x->quicktime_format = 1;
374 avctx->codec_id = CODEC_ID_MPEG4;
376 /* We are claiming to be Xvid */
377 x->quicktime_format = 0;
378 if(!avctx->codec_tag)
379 avctx->codec_tag = AV_RL32("xvid");
383 xvid_enc_create.max_bframes = avctx->max_b_frames;
384 xvid_enc_create.bquant_offset = 100 * avctx->b_quant_offset;
385 xvid_enc_create.bquant_ratio = 100 * avctx->b_quant_factor;
386 if( avctx->max_b_frames > 0 && !x->quicktime_format ) xvid_enc_create.global |= XVID_GLOBAL_PACKED;
388 /* Create encoder context */
389 xerr = xvid_encore(NULL, XVID_ENC_CREATE, &xvid_enc_create, NULL);
391 av_log(avctx, AV_LOG_ERROR, "Xvid: Could not create encoder reference\n");
395 x->encoder_handle = xvid_enc_create.handle;
396 avctx->coded_frame = &x->encoded_picture;
402 * Encode a single frame.
404 * @param avctx AVCodecContext pointer to context
405 * @param frame Pointer to encoded frame buffer
406 * @param buf_size Size of encoded frame buffer
407 * @param data Pointer to AVFrame of unencoded frame
408 * @return Returns 0 on success, -1 on failure
410 static int xvid_encode_frame(AVCodecContext *avctx,
411 unsigned char *frame, int buf_size, void *data) {
414 struct xvid_context *x = avctx->priv_data;
415 AVFrame *picture = data;
416 AVFrame *p = &(x->encoded_picture);
418 xvid_enc_frame_t xvid_enc_frame;
419 xvid_enc_stats_t xvid_enc_stats;
421 /* Start setting up the frame */
422 memset(&xvid_enc_frame, 0, sizeof(xvid_enc_frame));
423 xvid_enc_frame.version = XVID_VERSION;
424 memset(&xvid_enc_stats, 0, sizeof(xvid_enc_stats));
425 xvid_enc_stats.version = XVID_VERSION;
428 /* Let Xvid know where to put the frame. */
429 xvid_enc_frame.bitstream = frame;
430 xvid_enc_frame.length = buf_size;
432 /* Initialize input image fields */
433 if( avctx->pix_fmt != PIX_FMT_YUV420P ) {
434 av_log(avctx, AV_LOG_ERROR, "Xvid: Color spaces other than 420p not supported\n");
438 xvid_enc_frame.input.csp = XVID_CSP_PLANAR; /* YUV420P */
440 for( i = 0; i < 4; i++ ) {
441 xvid_enc_frame.input.plane[i] = picture->data[i];
442 xvid_enc_frame.input.stride[i] = picture->linesize[i];
446 xvid_enc_frame.vop_flags = x->vop_flags;
447 xvid_enc_frame.vol_flags = x->vol_flags;
448 xvid_enc_frame.motion = x->me_flags;
449 xvid_enc_frame.type =
450 picture->pict_type == AV_PICTURE_TYPE_I ? XVID_TYPE_IVOP :
451 picture->pict_type == AV_PICTURE_TYPE_P ? XVID_TYPE_PVOP :
452 picture->pict_type == AV_PICTURE_TYPE_B ? XVID_TYPE_BVOP :
455 /* Pixel aspect ratio setting */
456 if (avctx->sample_aspect_ratio.num < 0 || avctx->sample_aspect_ratio.num > 255 ||
457 avctx->sample_aspect_ratio.den < 0 || avctx->sample_aspect_ratio.den > 255) {
458 av_log(avctx, AV_LOG_ERROR, "Invalid pixel aspect ratio %i/%i\n",
459 avctx->sample_aspect_ratio.num, avctx->sample_aspect_ratio.den);
462 xvid_enc_frame.par = XVID_PAR_EXT;
463 xvid_enc_frame.par_width = avctx->sample_aspect_ratio.num;
464 xvid_enc_frame.par_height = avctx->sample_aspect_ratio.den;
467 if( x->qscale ) xvid_enc_frame.quant = picture->quality / FF_QP2LAMBDA;
468 else xvid_enc_frame.quant = 0;
471 xvid_enc_frame.quant_intra_matrix = x->intra_matrix;
472 xvid_enc_frame.quant_inter_matrix = x->inter_matrix;
475 xerr = xvid_encore(x->encoder_handle, XVID_ENC_ENCODE,
476 &xvid_enc_frame, &xvid_enc_stats);
478 /* Two-pass log buffer swapping */
479 avctx->stats_out = NULL;
480 if( x->twopassbuffer ) {
481 tmp = x->old_twopassbuffer;
482 x->old_twopassbuffer = x->twopassbuffer;
483 x->twopassbuffer = tmp;
484 x->twopassbuffer[0] = 0;
485 if( x->old_twopassbuffer[0] != 0 ) {
486 avctx->stats_out = x->old_twopassbuffer;
491 p->quality = xvid_enc_stats.quant * FF_QP2LAMBDA;
492 if( xvid_enc_stats.type == XVID_TYPE_PVOP )
493 p->pict_type = AV_PICTURE_TYPE_P;
494 else if( xvid_enc_stats.type == XVID_TYPE_BVOP )
495 p->pict_type = AV_PICTURE_TYPE_B;
496 else if( xvid_enc_stats.type == XVID_TYPE_SVOP )
497 p->pict_type = AV_PICTURE_TYPE_S;
499 p->pict_type = AV_PICTURE_TYPE_I;
500 if( xvid_enc_frame.out_flags & XVID_KEYFRAME ) {
502 if( x->quicktime_format )
503 return xvid_strip_vol_header(avctx, frame,
504 xvid_enc_stats.hlength, xerr);
510 av_log(avctx, AV_LOG_ERROR, "Xvid: Encoding Error Occurred: %i\n", xerr);
516 * Destroy the private context for the encoder.
517 * All buffers are freed, and the Xvid encoder context is destroyed.
519 * @param avctx AVCodecContext pointer to context
520 * @return Returns 0, success guaranteed
522 static av_cold int xvid_encode_close(AVCodecContext *avctx) {
523 struct xvid_context *x = avctx->priv_data;
525 xvid_encore(x->encoder_handle, XVID_ENC_DESTROY, NULL, NULL);
527 av_freep(&avctx->extradata);
528 if( x->twopassbuffer != NULL ) {
529 av_free(x->twopassbuffer);
530 av_free(x->old_twopassbuffer);
532 av_free(x->twopassfile);
533 av_free(x->intra_matrix);
534 av_free(x->inter_matrix);
540 * Routine to create a global VO/VOL header for MP4 container.
541 * What we do here is extract the header from the Xvid bitstream
542 * as it is encoded. We also strip the repeated headers from the
543 * bitstream when a global header is requested for MPEG-4 ISO
546 * @param avctx AVCodecContext pointer to context
547 * @param frame Pointer to encoded frame data
548 * @param header_len Length of header to search
549 * @param frame_len Length of encoded frame data
550 * @return Returns new length of frame data
552 int xvid_strip_vol_header(AVCodecContext *avctx,
553 unsigned char *frame,
554 unsigned int header_len,
555 unsigned int frame_len) {
558 for( i = 0; i < header_len - 3; i++ ) {
559 if( frame[i] == 0x00 &&
560 frame[i+1] == 0x00 &&
561 frame[i+2] == 0x01 &&
562 frame[i+3] == 0xB6 ) {
569 /* We need to store the header, so extract it */
570 if( avctx->extradata == NULL ) {
571 avctx->extradata = av_malloc(vo_len);
572 memcpy(avctx->extradata, frame, vo_len);
573 avctx->extradata_size = vo_len;
575 /* Less dangerous now, memmove properly copies the two
576 chunks of overlapping data */
577 memmove(frame, &(frame[vo_len]), frame_len - vo_len);
578 return frame_len - vo_len;
584 * Routine to correct a possibly erroneous framerate being fed to us.
585 * Xvid currently chokes on framerates where the ticks per frame is
586 * extremely large. This function works to correct problems in this area
587 * by estimating a new framerate and taking the simpler fraction of
590 * @param avctx Context that contains the framerate to correct.
592 void xvid_correct_framerate(AVCodecContext *avctx) {
594 int est_frate, est_fbase;
598 frate = avctx->time_base.den;
599 fbase = avctx->time_base.num;
601 gcd = av_gcd(frate, fbase);
607 if( frate <= 65000 && fbase <= 65000 ) {
608 avctx->time_base.den = frate;
609 avctx->time_base.num = fbase;
613 fps = (float)frate / (float)fbase;
614 est_fps = roundf(fps * 1000.0) / 1000.0;
616 est_frate = (int)est_fps;
617 if( est_fps > (int)est_fps ) {
618 est_frate = (est_frate + 1) * 1000;
619 est_fbase = (int)roundf((float)est_frate / est_fps);
623 gcd = av_gcd(est_frate, est_fbase);
629 if( fbase > est_fbase ) {
630 avctx->time_base.den = est_frate;
631 avctx->time_base.num = est_fbase;
632 av_log(avctx, AV_LOG_DEBUG,
633 "Xvid: framerate re-estimated: %.2f, %.3f%% correction\n",
634 est_fps, (((est_fps - fps)/fps) * 100.0));
636 avctx->time_base.den = frate;
637 avctx->time_base.num = fbase;
642 * Xvid 2-Pass Kludge Section
644 * Xvid's default 2-pass doesn't allow us to create data as we need to, so
645 * this section spends time replacing the first pass plugin so we can write
646 * statistic information as libavcodec requests in. We have another kludge
647 * that allows us to pass data to the second pass in Xvid without a custom
648 * rate-control plugin.
652 * Initialize the two-pass plugin and context.
654 * @param param Input construction parameter structure
655 * @param handle Private context handle
656 * @return Returns XVID_ERR_xxxx on failure, or 0 on success.
658 static int xvid_ff_2pass_create(xvid_plg_create_t * param,
660 struct xvid_ff_pass1 *x = (struct xvid_ff_pass1 *)param->param;
661 char *log = x->context->twopassbuffer;
663 /* Do a quick bounds check */
665 return XVID_ERR_FAIL;
667 /* We use snprintf() */
668 /* This is because we can safely prevent a buffer overflow */
670 snprintf(log, BUFFER_REMAINING(log),
671 "# ffmpeg 2-pass log file, using xvid codec\n");
672 snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log),
673 "# Do not modify. libxvidcore version: %d.%d.%d\n\n",
674 XVID_VERSION_MAJOR(XVID_VERSION),
675 XVID_VERSION_MINOR(XVID_VERSION),
676 XVID_VERSION_PATCH(XVID_VERSION));
678 *handle = x->context;
683 * Destroy the two-pass plugin context.
685 * @param ref Context pointer for the plugin
686 * @param param Destrooy context
687 * @return Returns 0, success guaranteed
689 static int xvid_ff_2pass_destroy(struct xvid_context *ref,
690 xvid_plg_destroy_t *param) {
691 /* Currently cannot think of anything to do on destruction */
692 /* Still, the framework should be here for reference/use */
693 if( ref->twopassbuffer != NULL )
694 ref->twopassbuffer[0] = 0;
699 * Enable fast encode mode during the first pass.
701 * @param ref Context pointer for the plugin
702 * @param param Frame data
703 * @return Returns 0, success guaranteed
705 static int xvid_ff_2pass_before(struct xvid_context *ref,
706 xvid_plg_data_t *param) {
708 int motion_replacements;
711 /* Nothing to do here, result is changed too much */
712 if( param->zone && param->zone->mode == XVID_ZONE_QUANT )
715 /* We can implement a 'turbo' first pass mode here */
719 motion_remove = ~XVID_ME_CHROMA_PVOP &
720 ~XVID_ME_CHROMA_BVOP &
721 ~XVID_ME_EXTSEARCH16 &
722 ~XVID_ME_ADVANCEDDIAMOND16;
723 motion_replacements = XVID_ME_FAST_MODEINTERPOLATE |
724 XVID_ME_SKIP_DELTASEARCH |
725 XVID_ME_FASTREFINE16 |
726 XVID_ME_BFRAME_EARLYSTOP;
727 vop_remove = ~XVID_VOP_MODEDECISION_RD &
728 ~XVID_VOP_FAST_MODEDECISION_RD &
729 ~XVID_VOP_TRELLISQUANT &
733 param->vol_flags &= ~XVID_VOL_GMC;
734 param->vop_flags &= vop_remove;
735 param->motion_flags &= motion_remove;
736 param->motion_flags |= motion_replacements;
742 * Capture statistic data and write it during first pass.
744 * @param ref Context pointer for the plugin
745 * @param param Statistic data
746 * @return Returns XVID_ERR_xxxx on failure, or 0 on success
748 static int xvid_ff_2pass_after(struct xvid_context *ref,
749 xvid_plg_data_t *param) {
750 char *log = ref->twopassbuffer;
751 char *frame_types = " ipbs";
754 /* Quick bounds check */
756 return XVID_ERR_FAIL;
758 /* Convert the type given to us into a character */
759 if( param->type < 5 && param->type > 0 ) {
760 frame_type = frame_types[param->type];
762 return XVID_ERR_FAIL;
765 snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log),
766 "%c %d %d %d %d %d %d\n",
767 frame_type, param->stats.quant, param->stats.kblks, param->stats.mblks,
768 param->stats.ublks, param->stats.length, param->stats.hlength);
774 * Dispatch function for our custom plugin.
775 * This handles the dispatch for the Xvid plugin. It passes data
776 * on to other functions for actual processing.
778 * @param ref Context pointer for the plugin
779 * @param cmd The task given for us to complete
780 * @param p1 First parameter (varies)
781 * @param p2 Second parameter (varies)
782 * @return Returns XVID_ERR_xxxx on failure, or 0 on success
784 int xvid_ff_2pass(void *ref, int cmd, void *p1, void *p2) {
790 case XVID_PLG_BEFORE:
791 return xvid_ff_2pass_before(ref, p1);
793 case XVID_PLG_CREATE:
794 return xvid_ff_2pass_create(p1, p2);
797 return xvid_ff_2pass_after(ref, p1);
799 case XVID_PLG_DESTROY:
800 return xvid_ff_2pass_destroy(ref, p1);
803 return XVID_ERR_FAIL;
808 * Xvid codec definition for libavcodec.
810 AVCodec ff_libxvid_encoder = {
814 sizeof(struct xvid_context),
818 .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
819 .long_name= NULL_IF_CONFIG_SMALL("libxvidcore MPEG-4 part 2"),
822 #endif /* CONFIG_LIBXVID_ENCODER */