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/intreadwrite.h"
35 #include "libxvid_internal.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 int has_altivec(void);
51 * Structure for the private Xvid context.
52 * This stores all the private context for the codec.
55 void *encoder_handle; /**< Handle for Xvid encoder */
56 int xsize; /**< Frame x size */
57 int ysize; /**< Frame y size */
58 int vop_flags; /**< VOP flags for Xvid encoder */
59 int vol_flags; /**< VOL flags for Xvid encoder */
60 int me_flags; /**< Motion Estimation flags */
61 int qscale; /**< Do we use constant scale? */
62 int quicktime_format; /**< Are we in a QT-based format? */
63 AVFrame encoded_picture; /**< Encoded frame information */
64 char *twopassbuffer; /**< Character buffer for two-pass */
65 char *old_twopassbuffer; /**< Old character buffer (two-pass) */
66 char *twopassfile; /**< second pass temp file name */
67 unsigned char *intra_matrix; /**< P-Frame Quant Matrix */
68 unsigned char *inter_matrix; /**< I-Frame Quant Matrix */
72 * Structure for the private first-pass plugin.
74 struct xvid_ff_pass1 {
75 int version; /**< Xvid version */
76 struct xvid_context *context; /**< Pointer to private context */
79 /* Prototypes - See function implementation for details */
80 int xvid_strip_vol_header(AVCodecContext *avctx, unsigned char *frame, unsigned int header_len, unsigned int frame_len);
81 int xvid_ff_2pass(void *ref, int opt, void *p1, void *p2);
82 void xvid_correct_framerate(AVCodecContext *avctx);
84 /* Wrapper to work around the lack of mkstemp() on mingw.
85 * Also, tries to create file in /tmp first, if possible.
86 * *prefix can be a character constant; *filename will be allocated internally.
87 * @return file descriptor of opened file (or -1 on error)
88 * and opened file name in **filename. */
89 int ff_tempfile(const char *prefix, char **filename) {
92 *filename = tempnam(".", prefix);
94 size_t len = strlen(prefix) + 12; /* room for "/tmp/" and "XXXXXX\0" */
95 *filename = av_malloc(len);
97 /* -----common section-----*/
98 if (*filename == NULL) {
99 av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot allocate file name\n");
103 fd = open(*filename, O_RDWR | O_BINARY | O_CREAT, 0444);
105 snprintf(*filename, len, "/tmp/%sXXXXXX", prefix);
106 fd = mkstemp(*filename);
108 snprintf(*filename, len, "./%sXXXXXX", prefix);
109 fd = mkstemp(*filename);
112 /* -----common section-----*/
114 av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot open temporary file %s\n", *filename);
117 return fd; /* success */
120 #if CONFIG_LIBXVID_ENCODER
123 * Create the private context for the encoder.
124 * All buffers are allocated, settings are loaded from the user,
125 * and the encoder context created.
127 * @param avctx AVCodecContext pointer to context
128 * @return Returns 0 on success, -1 on failure
130 static av_cold int xvid_encode_init(AVCodecContext *avctx) {
132 int xvid_flags = avctx->flags;
133 struct xvid_context *x = avctx->priv_data;
134 uint16_t *intra, *inter;
137 xvid_plugin_single_t single;
138 struct xvid_ff_pass1 rc2pass1;
139 xvid_plugin_2pass2_t rc2pass2;
140 xvid_gbl_init_t xvid_gbl_init;
141 xvid_enc_create_t xvid_enc_create;
142 xvid_enc_plugin_t plugins[7];
144 /* Bring in VOP flags from ffmpeg command-line */
145 x->vop_flags = XVID_VOP_HALFPEL; /* Bare minimum quality */
146 if( xvid_flags & CODEC_FLAG_4MV )
147 x->vop_flags |= XVID_VOP_INTER4V; /* Level 3 */
150 x->vop_flags |= XVID_VOP_TRELLISQUANT; /* Level 5 */
151 if( xvid_flags & CODEC_FLAG_AC_PRED )
152 x->vop_flags |= XVID_VOP_HQACPRED; /* Level 6 */
153 if( xvid_flags & CODEC_FLAG_GRAY )
154 x->vop_flags |= XVID_VOP_GREYSCALE;
156 /* Decide which ME quality setting to use */
158 switch( avctx->me_method ) {
159 case ME_FULL: /* Quality 6 */
160 x->me_flags |= XVID_ME_EXTSEARCH16
161 | XVID_ME_EXTSEARCH8;
163 case ME_EPZS: /* Quality 4 */
164 x->me_flags |= XVID_ME_ADVANCEDDIAMOND8
165 | XVID_ME_HALFPELREFINE8
166 | XVID_ME_CHROMA_PVOP
167 | XVID_ME_CHROMA_BVOP;
169 case ME_LOG: /* Quality 2 */
172 x->me_flags |= XVID_ME_ADVANCEDDIAMOND16
173 | XVID_ME_HALFPELREFINE16;
175 case ME_ZERO: /* Quality 0 */
180 /* Decide how we should decide blocks */
181 switch( avctx->mb_decision ) {
183 x->vop_flags |= XVID_VOP_MODEDECISION_RD;
184 x->me_flags |= XVID_ME_HALFPELREFINE8_RD
185 | XVID_ME_QUARTERPELREFINE8_RD
186 | XVID_ME_EXTSEARCH_RD
187 | XVID_ME_CHECKPREDICTION_RD;
189 if( !(x->vop_flags & XVID_VOP_MODEDECISION_RD) )
190 x->vop_flags |= XVID_VOP_FAST_MODEDECISION_RD;
191 x->me_flags |= XVID_ME_HALFPELREFINE16_RD
192 | XVID_ME_QUARTERPELREFINE16_RD;
198 /* Bring in VOL flags from ffmpeg command-line */
200 if( xvid_flags & CODEC_FLAG_GMC ) {
201 x->vol_flags |= XVID_VOL_GMC;
202 x->me_flags |= XVID_ME_GME_REFINE;
204 if( xvid_flags & CODEC_FLAG_QPEL ) {
205 x->vol_flags |= XVID_VOL_QUARTERPEL;
206 x->me_flags |= XVID_ME_QUARTERPELREFINE16;
207 if( x->vop_flags & XVID_VOP_INTER4V )
208 x->me_flags |= XVID_ME_QUARTERPELREFINE8;
211 memset(&xvid_gbl_init, 0, sizeof(xvid_gbl_init));
212 xvid_gbl_init.version = XVID_VERSION;
213 xvid_gbl_init.debug = 0;
216 /* Xvid's PPC support is borked, use libavcodec to detect */
218 if( has_altivec() ) {
219 xvid_gbl_init.cpu_flags = XVID_CPU_FORCE | XVID_CPU_ALTIVEC;
222 xvid_gbl_init.cpu_flags = XVID_CPU_FORCE;
224 /* Xvid can detect on x86 */
225 xvid_gbl_init.cpu_flags = 0;
229 xvid_global(NULL, XVID_GBL_INIT, &xvid_gbl_init, NULL);
231 /* Create the encoder reference */
232 memset(&xvid_enc_create, 0, sizeof(xvid_enc_create));
233 xvid_enc_create.version = XVID_VERSION;
235 /* Store the desired frame size */
236 xvid_enc_create.width = x->xsize = avctx->width;
237 xvid_enc_create.height = x->ysize = avctx->height;
239 /* Xvid can determine the proper profile to use */
240 /* xvid_enc_create.profile = XVID_PROFILE_S_L3; */
242 /* We don't use zones */
243 xvid_enc_create.zones = NULL;
244 xvid_enc_create.num_zones = 0;
246 xvid_enc_create.num_threads = avctx->thread_count;
248 xvid_enc_create.plugins = plugins;
249 xvid_enc_create.num_plugins = 0;
251 /* Initialize Buffers */
252 x->twopassbuffer = NULL;
253 x->old_twopassbuffer = NULL;
254 x->twopassfile = NULL;
256 if( xvid_flags & CODEC_FLAG_PASS1 ) {
257 memset(&rc2pass1, 0, sizeof(struct xvid_ff_pass1));
258 rc2pass1.version = XVID_VERSION;
259 rc2pass1.context = x;
260 x->twopassbuffer = av_malloc(BUFFER_SIZE);
261 x->old_twopassbuffer = av_malloc(BUFFER_SIZE);
262 if( x->twopassbuffer == NULL || x->old_twopassbuffer == NULL ) {
263 av_log(avctx, AV_LOG_ERROR,
264 "Xvid: Cannot allocate 2-pass log buffers\n");
267 x->twopassbuffer[0] = x->old_twopassbuffer[0] = 0;
269 plugins[xvid_enc_create.num_plugins].func = xvid_ff_2pass;
270 plugins[xvid_enc_create.num_plugins].param = &rc2pass1;
271 xvid_enc_create.num_plugins++;
272 } else if( xvid_flags & CODEC_FLAG_PASS2 ) {
273 memset(&rc2pass2, 0, sizeof(xvid_plugin_2pass2_t));
274 rc2pass2.version = XVID_VERSION;
275 rc2pass2.bitrate = avctx->bit_rate;
277 fd = ff_tempfile("xvidff.", &(x->twopassfile));
279 av_log(avctx, AV_LOG_ERROR,
280 "Xvid: Cannot write 2-pass pipe\n");
284 if( avctx->stats_in == NULL ) {
285 av_log(avctx, AV_LOG_ERROR,
286 "Xvid: No 2-pass information loaded for second pass\n");
290 if( strlen(avctx->stats_in) >
291 write(fd, avctx->stats_in, strlen(avctx->stats_in)) ) {
293 av_log(avctx, AV_LOG_ERROR,
294 "Xvid: Cannot write to 2-pass pipe\n");
299 rc2pass2.filename = x->twopassfile;
300 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_2pass2;
301 plugins[xvid_enc_create.num_plugins].param = &rc2pass2;
302 xvid_enc_create.num_plugins++;
303 } else if( !(xvid_flags & CODEC_FLAG_QSCALE) ) {
304 /* Single Pass Bitrate Control! */
305 memset(&single, 0, sizeof(xvid_plugin_single_t));
306 single.version = XVID_VERSION;
307 single.bitrate = avctx->bit_rate;
309 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_single;
310 plugins[xvid_enc_create.num_plugins].param = &single;
311 xvid_enc_create.num_plugins++;
314 /* Luminance Masking */
315 if( 0.0 != avctx->lumi_masking ) {
316 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_lumimasking;
317 plugins[xvid_enc_create.num_plugins].param = NULL;
318 xvid_enc_create.num_plugins++;
321 /* Frame Rate and Key Frames */
322 xvid_correct_framerate(avctx);
323 xvid_enc_create.fincr = avctx->time_base.num;
324 xvid_enc_create.fbase = avctx->time_base.den;
325 if( avctx->gop_size > 0 )
326 xvid_enc_create.max_key_interval = avctx->gop_size;
328 xvid_enc_create.max_key_interval = 240; /* Xvid's best default */
331 if( xvid_flags & CODEC_FLAG_QSCALE ) x->qscale = 1;
334 xvid_enc_create.min_quant[0] = avctx->qmin;
335 xvid_enc_create.min_quant[1] = avctx->qmin;
336 xvid_enc_create.min_quant[2] = avctx->qmin;
337 xvid_enc_create.max_quant[0] = avctx->qmax;
338 xvid_enc_create.max_quant[1] = avctx->qmax;
339 xvid_enc_create.max_quant[2] = avctx->qmax;
342 x->intra_matrix = x->inter_matrix = NULL;
343 if( avctx->mpeg_quant )
344 x->vol_flags |= XVID_VOL_MPEGQUANT;
345 if( (avctx->intra_matrix || avctx->inter_matrix) ) {
346 x->vol_flags |= XVID_VOL_MPEGQUANT;
348 if( avctx->intra_matrix ) {
349 intra = avctx->intra_matrix;
350 x->intra_matrix = av_malloc(sizeof(unsigned char) * 64);
353 if( avctx->inter_matrix ) {
354 inter = avctx->inter_matrix;
355 x->inter_matrix = av_malloc(sizeof(unsigned char) * 64);
359 for( i = 0; i < 64; i++ ) {
361 x->intra_matrix[i] = (unsigned char)intra[i];
363 x->inter_matrix[i] = (unsigned char)inter[i];
368 xvid_enc_create.frame_drop_ratio = 0;
369 xvid_enc_create.global = 0;
370 if( xvid_flags & CODEC_FLAG_CLOSED_GOP )
371 xvid_enc_create.global |= XVID_GLOBAL_CLOSED_GOP;
373 /* Determines which codec mode we are operating in */
374 avctx->extradata = NULL;
375 avctx->extradata_size = 0;
376 if( xvid_flags & CODEC_FLAG_GLOBAL_HEADER ) {
377 /* In this case, we are claiming to be MPEG4 */
378 x->quicktime_format = 1;
379 avctx->codec_id = CODEC_ID_MPEG4;
381 /* We are claiming to be Xvid */
382 x->quicktime_format = 0;
383 if(!avctx->codec_tag)
384 avctx->codec_tag = AV_RL32("xvid");
388 xvid_enc_create.max_bframes = avctx->max_b_frames;
389 xvid_enc_create.bquant_offset = 100 * avctx->b_quant_offset;
390 xvid_enc_create.bquant_ratio = 100 * avctx->b_quant_factor;
391 if( avctx->max_b_frames > 0 && !x->quicktime_format ) xvid_enc_create.global |= XVID_GLOBAL_PACKED;
393 /* Create encoder context */
394 xerr = xvid_encore(NULL, XVID_ENC_CREATE, &xvid_enc_create, NULL);
396 av_log(avctx, AV_LOG_ERROR, "Xvid: Could not create encoder reference\n");
400 x->encoder_handle = xvid_enc_create.handle;
401 avctx->coded_frame = &x->encoded_picture;
407 * Encode a single frame.
409 * @param avctx AVCodecContext pointer to context
410 * @param frame Pointer to encoded frame buffer
411 * @param buf_size Size of encoded frame buffer
412 * @param data Pointer to AVFrame of unencoded frame
413 * @return Returns 0 on success, -1 on failure
415 static int xvid_encode_frame(AVCodecContext *avctx,
416 unsigned char *frame, int buf_size, void *data) {
419 struct xvid_context *x = avctx->priv_data;
420 AVFrame *picture = data;
421 AVFrame *p = &(x->encoded_picture);
423 xvid_enc_frame_t xvid_enc_frame;
424 xvid_enc_stats_t xvid_enc_stats;
426 /* Start setting up the frame */
427 memset(&xvid_enc_frame, 0, sizeof(xvid_enc_frame));
428 xvid_enc_frame.version = XVID_VERSION;
429 memset(&xvid_enc_stats, 0, sizeof(xvid_enc_stats));
430 xvid_enc_stats.version = XVID_VERSION;
433 /* Let Xvid know where to put the frame. */
434 xvid_enc_frame.bitstream = frame;
435 xvid_enc_frame.length = buf_size;
437 /* Initialize input image fields */
438 if( avctx->pix_fmt != PIX_FMT_YUV420P ) {
439 av_log(avctx, AV_LOG_ERROR, "Xvid: Color spaces other than 420p not supported\n");
443 xvid_enc_frame.input.csp = XVID_CSP_PLANAR; /* YUV420P */
445 for( i = 0; i < 4; i++ ) {
446 xvid_enc_frame.input.plane[i] = picture->data[i];
447 xvid_enc_frame.input.stride[i] = picture->linesize[i];
451 xvid_enc_frame.vop_flags = x->vop_flags;
452 xvid_enc_frame.vol_flags = x->vol_flags;
453 xvid_enc_frame.motion = x->me_flags;
454 xvid_enc_frame.type = XVID_TYPE_AUTO;
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;
492 p->quality = xvid_enc_stats.quant * FF_QP2LAMBDA;
493 if( xvid_enc_stats.type == XVID_TYPE_PVOP )
494 p->pict_type = FF_P_TYPE;
495 else if( xvid_enc_stats.type == XVID_TYPE_BVOP )
496 p->pict_type = FF_B_TYPE;
497 else if( xvid_enc_stats.type == XVID_TYPE_SVOP )
498 p->pict_type = FF_S_TYPE;
500 p->pict_type = FF_I_TYPE;
501 if( xvid_enc_frame.out_flags & XVID_KEYFRAME ) {
503 if( x->quicktime_format )
504 return xvid_strip_vol_header(avctx, frame,
505 xvid_enc_stats.hlength, xerr);
511 av_log(avctx, AV_LOG_ERROR, "Xvid: Encoding Error Occurred: %i\n", xerr);
517 * Destroy the private context for the encoder.
518 * All buffers are freed, and the Xvid encoder context is destroyed.
520 * @param avctx AVCodecContext pointer to context
521 * @return Returns 0, success guaranteed
523 static av_cold int xvid_encode_close(AVCodecContext *avctx) {
524 struct xvid_context *x = avctx->priv_data;
526 xvid_encore(x->encoder_handle, XVID_ENC_DESTROY, NULL, NULL);
528 if( avctx->extradata != NULL )
529 av_freep(&avctx->extradata);
530 if( x->twopassbuffer != NULL ) {
531 av_free(x->twopassbuffer);
532 av_free(x->old_twopassbuffer);
534 if( x->twopassfile != NULL )
535 av_free(x->twopassfile);
536 if( x->intra_matrix != NULL )
537 av_free(x->intra_matrix);
538 if( x->inter_matrix != NULL )
539 av_free(x->inter_matrix);
545 * Routine to create a global VO/VOL header for MP4 container.
546 * What we do here is extract the header from the Xvid bitstream
547 * as it is encoded. We also strip the repeated headers from the
548 * bitstream when a global header is requested for MPEG-4 ISO
551 * @param avctx AVCodecContext pointer to context
552 * @param frame Pointer to encoded frame data
553 * @param header_len Length of header to search
554 * @param frame_len Length of encoded frame data
555 * @return Returns new length of frame data
557 int xvid_strip_vol_header(AVCodecContext *avctx,
558 unsigned char *frame,
559 unsigned int header_len,
560 unsigned int frame_len) {
563 for( i = 0; i < header_len - 3; i++ ) {
564 if( frame[i] == 0x00 &&
565 frame[i+1] == 0x00 &&
566 frame[i+2] == 0x01 &&
567 frame[i+3] == 0xB6 ) {
574 /* We need to store the header, so extract it */
575 if( avctx->extradata == NULL ) {
576 avctx->extradata = av_malloc(vo_len);
577 memcpy(avctx->extradata, frame, vo_len);
578 avctx->extradata_size = vo_len;
580 /* Less dangerous now, memmove properly copies the two
581 chunks of overlapping data */
582 memmove(frame, &(frame[vo_len]), frame_len - vo_len);
583 return frame_len - vo_len;
589 * Routine to correct a possibly erroneous framerate being fed to us.
590 * Xvid currently chokes on framerates where the ticks per frame is
591 * extremely large. This function works to correct problems in this area
592 * by estimating a new framerate and taking the simpler fraction of
595 * @param avctx Context that contains the framerate to correct.
597 void xvid_correct_framerate(AVCodecContext *avctx) {
599 int est_frate, est_fbase;
603 frate = avctx->time_base.den;
604 fbase = avctx->time_base.num;
606 gcd = av_gcd(frate, fbase);
612 if( frate <= 65000 && fbase <= 65000 ) {
613 avctx->time_base.den = frate;
614 avctx->time_base.num = fbase;
618 fps = (float)frate / (float)fbase;
619 est_fps = roundf(fps * 1000.0) / 1000.0;
621 est_frate = (int)est_fps;
622 if( est_fps > (int)est_fps ) {
623 est_frate = (est_frate + 1) * 1000;
624 est_fbase = (int)roundf((float)est_frate / est_fps);
628 gcd = av_gcd(est_frate, est_fbase);
634 if( fbase > est_fbase ) {
635 avctx->time_base.den = est_frate;
636 avctx->time_base.num = est_fbase;
637 av_log(avctx, AV_LOG_DEBUG,
638 "Xvid: framerate re-estimated: %.2f, %.3f%% correction\n",
639 est_fps, (((est_fps - fps)/fps) * 100.0));
641 avctx->time_base.den = frate;
642 avctx->time_base.num = fbase;
647 * Xvid 2-Pass Kludge Section
649 * Xvid's default 2-pass doesn't allow us to create data as we need to, so
650 * this section spends time replacing the first pass plugin so we can write
651 * statistic information as libavcodec requests in. We have another kludge
652 * that allows us to pass data to the second pass in Xvid without a custom
653 * rate-control plugin.
657 * Initialize the two-pass plugin and context.
659 * @param param Input construction parameter structure
660 * @param handle Private context handle
661 * @return Returns XVID_ERR_xxxx on failure, or 0 on success.
663 static int xvid_ff_2pass_create(xvid_plg_create_t * param,
665 struct xvid_ff_pass1 *x = (struct xvid_ff_pass1 *)param->param;
666 char *log = x->context->twopassbuffer;
668 /* Do a quick bounds check */
670 return XVID_ERR_FAIL;
672 /* We use snprintf() */
673 /* This is because we can safely prevent a buffer overflow */
675 snprintf(log, BUFFER_REMAINING(log),
676 "# ffmpeg 2-pass log file, using xvid codec\n");
677 snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log),
678 "# Do not modify. libxvidcore version: %d.%d.%d\n\n",
679 XVID_VERSION_MAJOR(XVID_VERSION),
680 XVID_VERSION_MINOR(XVID_VERSION),
681 XVID_VERSION_PATCH(XVID_VERSION));
683 *handle = x->context;
688 * Destroy the two-pass plugin context.
690 * @param ref Context pointer for the plugin
691 * @param param Destrooy context
692 * @return Returns 0, success guaranteed
694 static int xvid_ff_2pass_destroy(struct xvid_context *ref,
695 xvid_plg_destroy_t *param) {
696 /* Currently cannot think of anything to do on destruction */
697 /* Still, the framework should be here for reference/use */
698 if( ref->twopassbuffer != NULL )
699 ref->twopassbuffer[0] = 0;
704 * Enable fast encode mode during the first pass.
706 * @param ref Context pointer for the plugin
707 * @param param Frame data
708 * @return Returns 0, success guaranteed
710 static int xvid_ff_2pass_before(struct xvid_context *ref,
711 xvid_plg_data_t *param) {
713 int motion_replacements;
716 /* Nothing to do here, result is changed too much */
717 if( param->zone && param->zone->mode == XVID_ZONE_QUANT )
720 /* We can implement a 'turbo' first pass mode here */
724 motion_remove = ~XVID_ME_CHROMA_PVOP &
725 ~XVID_ME_CHROMA_BVOP &
726 ~XVID_ME_EXTSEARCH16 &
727 ~XVID_ME_ADVANCEDDIAMOND16;
728 motion_replacements = XVID_ME_FAST_MODEINTERPOLATE |
729 XVID_ME_SKIP_DELTASEARCH |
730 XVID_ME_FASTREFINE16 |
731 XVID_ME_BFRAME_EARLYSTOP;
732 vop_remove = ~XVID_VOP_MODEDECISION_RD &
733 ~XVID_VOP_FAST_MODEDECISION_RD &
734 ~XVID_VOP_TRELLISQUANT &
738 param->vol_flags &= ~XVID_VOL_GMC;
739 param->vop_flags &= vop_remove;
740 param->motion_flags &= motion_remove;
741 param->motion_flags |= motion_replacements;
747 * Capture statistic data and write it during first pass.
749 * @param ref Context pointer for the plugin
750 * @param param Statistic data
751 * @return Returns XVID_ERR_xxxx on failure, or 0 on success
753 static int xvid_ff_2pass_after(struct xvid_context *ref,
754 xvid_plg_data_t *param) {
755 char *log = ref->twopassbuffer;
756 char *frame_types = " ipbs";
759 /* Quick bounds check */
761 return XVID_ERR_FAIL;
763 /* Convert the type given to us into a character */
764 if( param->type < 5 && param->type > 0 ) {
765 frame_type = frame_types[param->type];
767 return XVID_ERR_FAIL;
770 snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log),
771 "%c %d %d %d %d %d %d\n",
772 frame_type, param->stats.quant, param->stats.kblks, param->stats.mblks,
773 param->stats.ublks, param->stats.length, param->stats.hlength);
779 * Dispatch function for our custom plugin.
780 * This handles the dispatch for the Xvid plugin. It passes data
781 * on to other functions for actual processing.
783 * @param ref Context pointer for the plugin
784 * @param cmd The task given for us to complete
785 * @param p1 First parameter (varies)
786 * @param p2 Second parameter (varies)
787 * @return Returns XVID_ERR_xxxx on failure, or 0 on success
789 int xvid_ff_2pass(void *ref, int cmd, void *p1, void *p2) {
795 case XVID_PLG_BEFORE:
796 return xvid_ff_2pass_before(ref, p1);
798 case XVID_PLG_CREATE:
799 return xvid_ff_2pass_create(p1, p2);
802 return xvid_ff_2pass_after(ref, p1);
804 case XVID_PLG_DESTROY:
805 return xvid_ff_2pass_destroy(ref, p1);
808 return XVID_ERR_FAIL;
813 * Xvid codec definition for libavcodec.
815 AVCodec libxvid_encoder = {
819 sizeof(struct xvid_context),
823 .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
824 .long_name= NULL_IF_CONFIG_SMALL("libxvidcore MPEG-4 part 2"),
827 #endif /* CONFIG_LIBXVID_ENCODER */