2 * Interface to xvidcore for mpeg4 encoding
3 * Copyright (c) 2004 Adam Thayer <krevnik@comcast.net>
5 * This file is part of Libav.
7 * Libav 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 * Libav 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 Libav; 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 "libavutil/mathematics.h"
34 #include "libxvid_internal.h"
35 #include "mpegvideo.h"
41 * Buffer management macros.
43 #define BUFFER_SIZE 1024
44 #define BUFFER_REMAINING(x) (BUFFER_SIZE - strlen(x))
45 #define BUFFER_CAT(x) (&((x)[strlen(x)]))
48 * Structure for the private Xvid context.
49 * This stores all the private context for the codec.
52 void *encoder_handle; /**< Handle for Xvid encoder */
53 int xsize; /**< Frame x size */
54 int ysize; /**< Frame y size */
55 int vop_flags; /**< VOP flags for Xvid encoder */
56 int vol_flags; /**< VOL flags for Xvid encoder */
57 int me_flags; /**< Motion Estimation flags */
58 int qscale; /**< Do we use constant scale? */
59 int quicktime_format; /**< Are we in a QT-based format? */
60 AVFrame encoded_picture; /**< Encoded frame information */
61 char *twopassbuffer; /**< Character buffer for two-pass */
62 char *old_twopassbuffer; /**< Old character buffer (two-pass) */
63 char *twopassfile; /**< second pass temp file name */
64 unsigned char *intra_matrix; /**< P-Frame Quant Matrix */
65 unsigned char *inter_matrix; /**< I-Frame Quant Matrix */
69 * Structure for the private first-pass plugin.
71 struct xvid_ff_pass1 {
72 int version; /**< Xvid version */
73 struct xvid_context *context; /**< Pointer to private context */
76 /* Prototypes - See function implementation for details */
77 int xvid_strip_vol_header(AVCodecContext *avctx, AVPacket *pkt, unsigned int header_len, unsigned int frame_len);
78 int xvid_ff_2pass(void *ref, int opt, void *p1, void *p2);
79 void xvid_correct_framerate(AVCodecContext *avctx);
81 /* Wrapper to work around the lack of mkstemp() on mingw.
82 * Also, tries to create file in /tmp first, if possible.
83 * *prefix can be a character constant; *filename will be allocated internally.
84 * @return file descriptor of opened file (or -1 on error)
85 * and opened file name in **filename. */
86 int ff_tempfile(const char *prefix, char **filename) {
89 *filename = tempnam(".", prefix);
91 size_t len = strlen(prefix) + 12; /* room for "/tmp/" and "XXXXXX\0" */
92 *filename = av_malloc(len);
94 /* -----common section-----*/
95 if (*filename == NULL) {
96 av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot allocate file name\n");
100 fd = open(*filename, O_RDWR | O_BINARY | O_CREAT, 0444);
102 snprintf(*filename, len, "/tmp/%sXXXXXX", prefix);
103 fd = mkstemp(*filename);
105 snprintf(*filename, len, "./%sXXXXXX", prefix);
106 fd = mkstemp(*filename);
109 /* -----common section-----*/
111 av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot open temporary file %s\n", *filename);
114 return fd; /* success */
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 = { 0 };
133 struct xvid_ff_pass1 rc2pass1 = { 0 };
134 xvid_plugin_2pass2_t rc2pass2 = { 0 };
135 xvid_gbl_init_t xvid_gbl_init = { 0 };
136 xvid_enc_create_t xvid_enc_create = { 0 };
137 xvid_enc_plugin_t plugins[7];
139 /* Bring in VOP flags from avconv 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 avconv 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 xvid_gbl_init.version = XVID_VERSION;
207 xvid_gbl_init.debug = 0;
210 /* Xvid's PPC support is borked, use libavcodec to detect */
212 if (av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC) {
213 xvid_gbl_init.cpu_flags = XVID_CPU_FORCE | XVID_CPU_ALTIVEC;
216 xvid_gbl_init.cpu_flags = XVID_CPU_FORCE;
218 /* Xvid can detect on x86 */
219 xvid_gbl_init.cpu_flags = 0;
223 xvid_global(NULL, XVID_GBL_INIT, &xvid_gbl_init, NULL);
225 /* Create the encoder reference */
226 xvid_enc_create.version = XVID_VERSION;
228 /* Store the desired frame size */
229 xvid_enc_create.width = x->xsize = avctx->width;
230 xvid_enc_create.height = x->ysize = avctx->height;
232 /* Xvid can determine the proper profile to use */
233 /* xvid_enc_create.profile = XVID_PROFILE_S_L3; */
235 /* We don't use zones */
236 xvid_enc_create.zones = NULL;
237 xvid_enc_create.num_zones = 0;
239 xvid_enc_create.num_threads = avctx->thread_count;
241 xvid_enc_create.plugins = plugins;
242 xvid_enc_create.num_plugins = 0;
244 /* Initialize Buffers */
245 x->twopassbuffer = NULL;
246 x->old_twopassbuffer = NULL;
247 x->twopassfile = NULL;
249 if( xvid_flags & CODEC_FLAG_PASS1 ) {
250 rc2pass1.version = XVID_VERSION;
251 rc2pass1.context = x;
252 x->twopassbuffer = av_malloc(BUFFER_SIZE);
253 x->old_twopassbuffer = av_malloc(BUFFER_SIZE);
254 if( x->twopassbuffer == NULL || x->old_twopassbuffer == NULL ) {
255 av_log(avctx, AV_LOG_ERROR,
256 "Xvid: Cannot allocate 2-pass log buffers\n");
259 x->twopassbuffer[0] = x->old_twopassbuffer[0] = 0;
261 plugins[xvid_enc_create.num_plugins].func = xvid_ff_2pass;
262 plugins[xvid_enc_create.num_plugins].param = &rc2pass1;
263 xvid_enc_create.num_plugins++;
264 } else if( xvid_flags & CODEC_FLAG_PASS2 ) {
265 rc2pass2.version = XVID_VERSION;
266 rc2pass2.bitrate = avctx->bit_rate;
268 fd = ff_tempfile("xvidff.", &x->twopassfile);
270 av_log(avctx, AV_LOG_ERROR,
271 "Xvid: Cannot write 2-pass pipe\n");
275 if( avctx->stats_in == NULL ) {
276 av_log(avctx, AV_LOG_ERROR,
277 "Xvid: No 2-pass information loaded for second pass\n");
281 if( strlen(avctx->stats_in) >
282 write(fd, avctx->stats_in, strlen(avctx->stats_in)) ) {
284 av_log(avctx, AV_LOG_ERROR,
285 "Xvid: Cannot write to 2-pass pipe\n");
290 rc2pass2.filename = x->twopassfile;
291 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_2pass2;
292 plugins[xvid_enc_create.num_plugins].param = &rc2pass2;
293 xvid_enc_create.num_plugins++;
294 } else if( !(xvid_flags & CODEC_FLAG_QSCALE) ) {
295 /* Single Pass Bitrate Control! */
296 single.version = XVID_VERSION;
297 single.bitrate = avctx->bit_rate;
299 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_single;
300 plugins[xvid_enc_create.num_plugins].param = &single;
301 xvid_enc_create.num_plugins++;
304 /* Luminance Masking */
305 if( 0.0 != avctx->lumi_masking ) {
306 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_lumimasking;
307 plugins[xvid_enc_create.num_plugins].param = NULL;
308 xvid_enc_create.num_plugins++;
311 /* Frame Rate and Key Frames */
312 xvid_correct_framerate(avctx);
313 xvid_enc_create.fincr = avctx->time_base.num;
314 xvid_enc_create.fbase = avctx->time_base.den;
315 if( avctx->gop_size > 0 )
316 xvid_enc_create.max_key_interval = avctx->gop_size;
318 xvid_enc_create.max_key_interval = 240; /* Xvid's best default */
321 if( xvid_flags & CODEC_FLAG_QSCALE ) x->qscale = 1;
324 xvid_enc_create.min_quant[0] = avctx->qmin;
325 xvid_enc_create.min_quant[1] = avctx->qmin;
326 xvid_enc_create.min_quant[2] = avctx->qmin;
327 xvid_enc_create.max_quant[0] = avctx->qmax;
328 xvid_enc_create.max_quant[1] = avctx->qmax;
329 xvid_enc_create.max_quant[2] = avctx->qmax;
332 x->intra_matrix = x->inter_matrix = NULL;
333 if( avctx->mpeg_quant )
334 x->vol_flags |= XVID_VOL_MPEGQUANT;
335 if( (avctx->intra_matrix || avctx->inter_matrix) ) {
336 x->vol_flags |= XVID_VOL_MPEGQUANT;
338 if( avctx->intra_matrix ) {
339 intra = avctx->intra_matrix;
340 x->intra_matrix = av_malloc(sizeof(unsigned char) * 64);
343 if( avctx->inter_matrix ) {
344 inter = avctx->inter_matrix;
345 x->inter_matrix = av_malloc(sizeof(unsigned char) * 64);
349 for( i = 0; i < 64; i++ ) {
351 x->intra_matrix[i] = (unsigned char)intra[i];
353 x->inter_matrix[i] = (unsigned char)inter[i];
358 xvid_enc_create.frame_drop_ratio = 0;
359 xvid_enc_create.global = 0;
360 if( xvid_flags & CODEC_FLAG_CLOSED_GOP )
361 xvid_enc_create.global |= XVID_GLOBAL_CLOSED_GOP;
363 /* Determines which codec mode we are operating in */
364 avctx->extradata = NULL;
365 avctx->extradata_size = 0;
366 if( xvid_flags & CODEC_FLAG_GLOBAL_HEADER ) {
367 /* In this case, we are claiming to be MPEG4 */
368 x->quicktime_format = 1;
369 avctx->codec_id = CODEC_ID_MPEG4;
371 /* We are claiming to be Xvid */
372 x->quicktime_format = 0;
373 if(!avctx->codec_tag)
374 avctx->codec_tag = AV_RL32("xvid");
378 xvid_enc_create.max_bframes = avctx->max_b_frames;
379 xvid_enc_create.bquant_offset = 100 * avctx->b_quant_offset;
380 xvid_enc_create.bquant_ratio = 100 * avctx->b_quant_factor;
381 if( avctx->max_b_frames > 0 && !x->quicktime_format ) xvid_enc_create.global |= XVID_GLOBAL_PACKED;
383 /* Create encoder context */
384 xerr = xvid_encore(NULL, XVID_ENC_CREATE, &xvid_enc_create, NULL);
386 av_log(avctx, AV_LOG_ERROR, "Xvid: Could not create encoder reference\n");
390 x->encoder_handle = xvid_enc_create.handle;
391 avctx->coded_frame = &x->encoded_picture;
397 * Encode a single frame.
399 * @param avctx AVCodecContext pointer to context
400 * @param frame Pointer to encoded frame buffer
401 * @param buf_size Size of encoded frame buffer
402 * @param data Pointer to AVFrame of unencoded frame
403 * @return Returns 0 on success, -1 on failure
405 static int xvid_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
406 const AVFrame *picture, int *got_packet)
408 int xerr, i, ret, user_packet = !!pkt->data;
410 struct xvid_context *x = avctx->priv_data;
411 AVFrame *p = &x->encoded_picture;
412 int mb_width = (avctx->width + 15) / 16;
413 int mb_height = (avctx->height + 15) / 16;
415 xvid_enc_frame_t xvid_enc_frame = { 0 };
416 xvid_enc_stats_t xvid_enc_stats = { 0 };
419 (ret = av_new_packet(pkt, mb_width*mb_height*MAX_MB_BYTES + FF_MIN_BUFFER_SIZE)) < 0) {
420 av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
424 /* Start setting up the frame */
425 xvid_enc_frame.version = XVID_VERSION;
426 xvid_enc_stats.version = XVID_VERSION;
429 /* Let Xvid know where to put the frame. */
430 xvid_enc_frame.bitstream = pkt->data;
431 xvid_enc_frame.length = pkt->size;
433 /* Initialize input image fields */
434 if( avctx->pix_fmt != PIX_FMT_YUV420P ) {
435 av_log(avctx, AV_LOG_ERROR, "Xvid: Color spaces other than 420p not supported\n");
439 xvid_enc_frame.input.csp = XVID_CSP_PLANAR; /* YUV420P */
441 for( i = 0; i < 4; i++ ) {
442 xvid_enc_frame.input.plane[i] = picture->data[i];
443 xvid_enc_frame.input.stride[i] = picture->linesize[i];
447 xvid_enc_frame.vop_flags = x->vop_flags;
448 xvid_enc_frame.vol_flags = x->vol_flags;
449 xvid_enc_frame.motion = x->me_flags;
450 xvid_enc_frame.type =
451 picture->pict_type == AV_PICTURE_TYPE_I ? XVID_TYPE_IVOP :
452 picture->pict_type == AV_PICTURE_TYPE_P ? XVID_TYPE_PVOP :
453 picture->pict_type == AV_PICTURE_TYPE_B ? XVID_TYPE_BVOP :
456 /* Pixel aspect ratio setting */
457 if (avctx->sample_aspect_ratio.num < 1 || avctx->sample_aspect_ratio.num > 255 ||
458 avctx->sample_aspect_ratio.den < 1 || avctx->sample_aspect_ratio.den > 255) {
459 av_log(avctx, AV_LOG_ERROR, "Invalid pixel aspect ratio %i/%i\n",
460 avctx->sample_aspect_ratio.num, avctx->sample_aspect_ratio.den);
463 xvid_enc_frame.par = XVID_PAR_EXT;
464 xvid_enc_frame.par_width = avctx->sample_aspect_ratio.num;
465 xvid_enc_frame.par_height = avctx->sample_aspect_ratio.den;
468 if( x->qscale ) xvid_enc_frame.quant = picture->quality / FF_QP2LAMBDA;
469 else xvid_enc_frame.quant = 0;
472 xvid_enc_frame.quant_intra_matrix = x->intra_matrix;
473 xvid_enc_frame.quant_inter_matrix = x->inter_matrix;
476 xerr = xvid_encore(x->encoder_handle, XVID_ENC_ENCODE,
477 &xvid_enc_frame, &xvid_enc_stats);
479 /* Two-pass log buffer swapping */
480 avctx->stats_out = NULL;
481 if( x->twopassbuffer ) {
482 tmp = x->old_twopassbuffer;
483 x->old_twopassbuffer = x->twopassbuffer;
484 x->twopassbuffer = tmp;
485 x->twopassbuffer[0] = 0;
486 if( x->old_twopassbuffer[0] != 0 ) {
487 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 = AV_PICTURE_TYPE_P;
497 else if( xvid_enc_stats.type == XVID_TYPE_BVOP )
498 p->pict_type = AV_PICTURE_TYPE_B;
499 else if( xvid_enc_stats.type == XVID_TYPE_SVOP )
500 p->pict_type = AV_PICTURE_TYPE_S;
502 p->pict_type = AV_PICTURE_TYPE_I;
503 if( xvid_enc_frame.out_flags & XVID_KEYFRAME ) {
505 pkt->flags |= AV_PKT_FLAG_KEY;
506 if( x->quicktime_format )
507 return xvid_strip_vol_header(avctx, pkt,
508 xvid_enc_stats.hlength, xerr);
520 av_log(avctx, AV_LOG_ERROR, "Xvid: Encoding Error Occurred: %i\n", xerr);
526 * Destroy the private context for the encoder.
527 * All buffers are freed, and the Xvid encoder context is destroyed.
529 * @param avctx AVCodecContext pointer to context
530 * @return Returns 0, success guaranteed
532 static av_cold int xvid_encode_close(AVCodecContext *avctx) {
533 struct xvid_context *x = avctx->priv_data;
535 xvid_encore(x->encoder_handle, XVID_ENC_DESTROY, NULL, NULL);
537 av_freep(&avctx->extradata);
538 if( x->twopassbuffer != NULL ) {
539 av_free(x->twopassbuffer);
540 av_free(x->old_twopassbuffer);
542 av_free(x->twopassfile);
543 av_free(x->intra_matrix);
544 av_free(x->inter_matrix);
550 * Routine to create a global VO/VOL header for MP4 container.
551 * What we do here is extract the header from the Xvid bitstream
552 * as it is encoded. We also strip the repeated headers from the
553 * bitstream when a global header is requested for MPEG-4 ISO
556 * @param avctx AVCodecContext pointer to context
557 * @param frame Pointer to encoded frame data
558 * @param header_len Length of header to search
559 * @param frame_len Length of encoded frame data
560 * @return Returns new length of frame data
562 int xvid_strip_vol_header(AVCodecContext *avctx,
564 unsigned int header_len,
565 unsigned int frame_len) {
568 for( i = 0; i < header_len - 3; i++ ) {
569 if( pkt->data[i] == 0x00 &&
570 pkt->data[i+1] == 0x00 &&
571 pkt->data[i+2] == 0x01 &&
572 pkt->data[i+3] == 0xB6 ) {
579 /* We need to store the header, so extract it */
580 if( avctx->extradata == NULL ) {
581 avctx->extradata = av_malloc(vo_len);
582 memcpy(avctx->extradata, pkt->data, vo_len);
583 avctx->extradata_size = vo_len;
585 /* Less dangerous now, memmove properly copies the two
586 chunks of overlapping data */
587 memmove(pkt->data, &pkt->data[vo_len], frame_len - vo_len);
588 pkt->size = frame_len - vo_len;
594 * Routine to correct a possibly erroneous framerate being fed to us.
595 * Xvid currently chokes on framerates where the ticks per frame is
596 * extremely large. This function works to correct problems in this area
597 * by estimating a new framerate and taking the simpler fraction of
600 * @param avctx Context that contains the framerate to correct.
602 void xvid_correct_framerate(AVCodecContext *avctx) {
604 int est_frate, est_fbase;
608 frate = avctx->time_base.den;
609 fbase = avctx->time_base.num;
611 gcd = av_gcd(frate, fbase);
617 if( frate <= 65000 && fbase <= 65000 ) {
618 avctx->time_base.den = frate;
619 avctx->time_base.num = fbase;
623 fps = (float)frate / (float)fbase;
624 est_fps = roundf(fps * 1000.0) / 1000.0;
626 est_frate = (int)est_fps;
627 if( est_fps > (int)est_fps ) {
628 est_frate = (est_frate + 1) * 1000;
629 est_fbase = (int)roundf((float)est_frate / est_fps);
633 gcd = av_gcd(est_frate, est_fbase);
639 if( fbase > est_fbase ) {
640 avctx->time_base.den = est_frate;
641 avctx->time_base.num = est_fbase;
642 av_log(avctx, AV_LOG_DEBUG,
643 "Xvid: framerate re-estimated: %.2f, %.3f%% correction\n",
644 est_fps, (((est_fps - fps)/fps) * 100.0));
646 avctx->time_base.den = frate;
647 avctx->time_base.num = fbase;
652 * Xvid 2-Pass Kludge Section
654 * Xvid's default 2-pass doesn't allow us to create data as we need to, so
655 * this section spends time replacing the first pass plugin so we can write
656 * statistic information as libavcodec requests in. We have another kludge
657 * that allows us to pass data to the second pass in Xvid without a custom
658 * rate-control plugin.
662 * Initialize the two-pass plugin and context.
664 * @param param Input construction parameter structure
665 * @param handle Private context handle
666 * @return Returns XVID_ERR_xxxx on failure, or 0 on success.
668 static int xvid_ff_2pass_create(xvid_plg_create_t * param,
670 struct xvid_ff_pass1 *x = (struct xvid_ff_pass1 *)param->param;
671 char *log = x->context->twopassbuffer;
673 /* Do a quick bounds check */
675 return XVID_ERR_FAIL;
677 /* We use snprintf() */
678 /* This is because we can safely prevent a buffer overflow */
680 snprintf(log, BUFFER_REMAINING(log),
681 "# avconv 2-pass log file, using xvid codec\n");
682 snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log),
683 "# Do not modify. libxvidcore version: %d.%d.%d\n\n",
684 XVID_VERSION_MAJOR(XVID_VERSION),
685 XVID_VERSION_MINOR(XVID_VERSION),
686 XVID_VERSION_PATCH(XVID_VERSION));
688 *handle = x->context;
693 * Destroy the two-pass plugin context.
695 * @param ref Context pointer for the plugin
696 * @param param Destrooy context
697 * @return Returns 0, success guaranteed
699 static int xvid_ff_2pass_destroy(struct xvid_context *ref,
700 xvid_plg_destroy_t *param) {
701 /* Currently cannot think of anything to do on destruction */
702 /* Still, the framework should be here for reference/use */
703 if( ref->twopassbuffer != NULL )
704 ref->twopassbuffer[0] = 0;
709 * Enable fast encode mode during the first pass.
711 * @param ref Context pointer for the plugin
712 * @param param Frame data
713 * @return Returns 0, success guaranteed
715 static int xvid_ff_2pass_before(struct xvid_context *ref,
716 xvid_plg_data_t *param) {
718 int motion_replacements;
721 /* Nothing to do here, result is changed too much */
722 if( param->zone && param->zone->mode == XVID_ZONE_QUANT )
725 /* We can implement a 'turbo' first pass mode here */
729 motion_remove = ~XVID_ME_CHROMA_PVOP &
730 ~XVID_ME_CHROMA_BVOP &
731 ~XVID_ME_EXTSEARCH16 &
732 ~XVID_ME_ADVANCEDDIAMOND16;
733 motion_replacements = XVID_ME_FAST_MODEINTERPOLATE |
734 XVID_ME_SKIP_DELTASEARCH |
735 XVID_ME_FASTREFINE16 |
736 XVID_ME_BFRAME_EARLYSTOP;
737 vop_remove = ~XVID_VOP_MODEDECISION_RD &
738 ~XVID_VOP_FAST_MODEDECISION_RD &
739 ~XVID_VOP_TRELLISQUANT &
743 param->vol_flags &= ~XVID_VOL_GMC;
744 param->vop_flags &= vop_remove;
745 param->motion_flags &= motion_remove;
746 param->motion_flags |= motion_replacements;
752 * Capture statistic data and write it during first pass.
754 * @param ref Context pointer for the plugin
755 * @param param Statistic data
756 * @return Returns XVID_ERR_xxxx on failure, or 0 on success
758 static int xvid_ff_2pass_after(struct xvid_context *ref,
759 xvid_plg_data_t *param) {
760 char *log = ref->twopassbuffer;
761 const char *frame_types = " ipbs";
764 /* Quick bounds check */
766 return XVID_ERR_FAIL;
768 /* Convert the type given to us into a character */
769 if( param->type < 5 && param->type > 0 ) {
770 frame_type = frame_types[param->type];
772 return XVID_ERR_FAIL;
775 snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log),
776 "%c %d %d %d %d %d %d\n",
777 frame_type, param->stats.quant, param->stats.kblks, param->stats.mblks,
778 param->stats.ublks, param->stats.length, param->stats.hlength);
784 * Dispatch function for our custom plugin.
785 * This handles the dispatch for the Xvid plugin. It passes data
786 * on to other functions for actual processing.
788 * @param ref Context pointer for the plugin
789 * @param cmd The task given for us to complete
790 * @param p1 First parameter (varies)
791 * @param p2 Second parameter (varies)
792 * @return Returns XVID_ERR_xxxx on failure, or 0 on success
794 int xvid_ff_2pass(void *ref, int cmd, void *p1, void *p2) {
800 case XVID_PLG_BEFORE:
801 return xvid_ff_2pass_before(ref, p1);
803 case XVID_PLG_CREATE:
804 return xvid_ff_2pass_create(p1, p2);
807 return xvid_ff_2pass_after(ref, p1);
809 case XVID_PLG_DESTROY:
810 return xvid_ff_2pass_destroy(ref, p1);
813 return XVID_ERR_FAIL;
818 * Xvid codec definition for libavcodec.
820 AVCodec ff_libxvid_encoder = {
822 .type = AVMEDIA_TYPE_VIDEO,
823 .id = CODEC_ID_MPEG4,
824 .priv_data_size = sizeof(struct xvid_context),
825 .init = xvid_encode_init,
826 .encode2 = xvid_encode_frame,
827 .close = xvid_encode_close,
828 .pix_fmts = (const enum PixelFormat[]){ PIX_FMT_YUV420P, PIX_FMT_NONE },
829 .long_name = NULL_IF_CONFIG_SMALL("libxvidcore MPEG-4 part 2"),