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, ysize; /** Frame size */
57 int vop_flags; /** VOP flags for Xvid encoder */
58 int vol_flags; /** VOL flags for Xvid encoder */
59 int me_flags; /** Motion Estimation flags */
60 int qscale; /** Do we use constant scale? */
61 int quicktime_format; /** Are we in a QT-based format? */
62 AVFrame encoded_picture; /** Encoded frame information */
63 char *twopassbuffer; /** Character buffer for two-pass */
64 char *old_twopassbuffer; /** Old character buffer (two-pass) */
65 char *twopassfile; /** second pass temp file name */
66 unsigned char *intra_matrix; /** P-Frame Quant Matrix */
67 unsigned char *inter_matrix; /** I-Frame Quant Matrix */
71 * Structure for the private first-pass plugin.
73 struct xvid_ff_pass1 {
74 int version; /** Xvid version */
75 struct xvid_context *context; /** Pointer to private context */
78 /* Prototypes - See function implementation for details */
79 int xvid_strip_vol_header(AVCodecContext *avctx, unsigned char *frame, unsigned int header_len, unsigned int frame_len);
80 int xvid_ff_2pass(void *ref, int opt, void *p1, void *p2);
81 void xvid_correct_framerate(AVCodecContext *avctx);
83 /* Wrapper to work around the lack of mkstemp() on mingw.
84 * Also, tries to create file in /tmp first, if possible.
85 * *prefix can be a character constant; *filename will be allocated internally.
86 * @return file descriptor of opened file (or -1 on error)
87 * and opened file name in **filename. */
88 int ff_tempfile(const char *prefix, char **filename) {
91 *filename = tempnam(".", prefix);
93 size_t len = strlen(prefix) + 12; /* room for "/tmp/" and "XXXXXX\0" */
94 *filename = av_malloc(len);
96 /* -----common section-----*/
97 if (*filename == NULL) {
98 av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot allocate file name\n");
102 fd = open(*filename, O_RDWR | O_BINARY | O_CREAT, 0444);
104 snprintf(*filename, len, "/tmp/%sXXXXXX", prefix);
105 fd = mkstemp(*filename);
107 snprintf(*filename, len, "./%sXXXXXX", prefix);
108 fd = mkstemp(*filename);
111 /* -----common section-----*/
113 av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot open temporary file %s\n", *filename);
116 return fd; /* success */
119 #if CONFIG_LIBXVID_ENCODER
122 * Create the private context for the encoder.
123 * All buffers are allocated, settings are loaded from the user,
124 * and the encoder context created.
126 * @param avctx AVCodecContext pointer to context
127 * @return Returns 0 on success, -1 on failure
129 static av_cold int xvid_encode_init(AVCodecContext *avctx) {
131 int xvid_flags = avctx->flags;
132 struct xvid_context *x = avctx->priv_data;
133 uint16_t *intra, *inter;
136 xvid_plugin_single_t single;
137 struct xvid_ff_pass1 rc2pass1;
138 xvid_plugin_2pass2_t rc2pass2;
139 xvid_gbl_init_t xvid_gbl_init;
140 xvid_enc_create_t xvid_enc_create;
141 xvid_enc_plugin_t plugins[7];
143 /* Bring in VOP flags from ffmpeg command-line */
144 x->vop_flags = XVID_VOP_HALFPEL; /* Bare minimum quality */
145 if( xvid_flags & CODEC_FLAG_4MV )
146 x->vop_flags |= XVID_VOP_INTER4V; /* Level 3 */
149 x->vop_flags |= XVID_VOP_TRELLISQUANT; /* Level 5 */
150 if( xvid_flags & CODEC_FLAG_AC_PRED )
151 x->vop_flags |= XVID_VOP_HQACPRED; /* Level 6 */
152 if( xvid_flags & CODEC_FLAG_GRAY )
153 x->vop_flags |= XVID_VOP_GREYSCALE;
155 /* Decide which ME quality setting to use */
157 switch( avctx->me_method ) {
158 case ME_FULL: /* Quality 6 */
159 x->me_flags |= XVID_ME_EXTSEARCH16
160 | XVID_ME_EXTSEARCH8;
162 case ME_EPZS: /* Quality 4 */
163 x->me_flags |= XVID_ME_ADVANCEDDIAMOND8
164 | XVID_ME_HALFPELREFINE8
165 | XVID_ME_CHROMA_PVOP
166 | XVID_ME_CHROMA_BVOP;
168 case ME_LOG: /* Quality 2 */
171 x->me_flags |= XVID_ME_ADVANCEDDIAMOND16
172 | XVID_ME_HALFPELREFINE16;
174 case ME_ZERO: /* Quality 0 */
179 /* Decide how we should decide blocks */
180 switch( avctx->mb_decision ) {
182 x->vop_flags |= XVID_VOP_MODEDECISION_RD;
183 x->me_flags |= XVID_ME_HALFPELREFINE8_RD
184 | XVID_ME_QUARTERPELREFINE8_RD
185 | XVID_ME_EXTSEARCH_RD
186 | XVID_ME_CHECKPREDICTION_RD;
188 if( !(x->vop_flags & XVID_VOP_MODEDECISION_RD) )
189 x->vop_flags |= XVID_VOP_FAST_MODEDECISION_RD;
190 x->me_flags |= XVID_ME_HALFPELREFINE16_RD
191 | XVID_ME_QUARTERPELREFINE16_RD;
197 /* Bring in VOL flags from ffmpeg command-line */
199 if( xvid_flags & CODEC_FLAG_GMC ) {
200 x->vol_flags |= XVID_VOL_GMC;
201 x->me_flags |= XVID_ME_GME_REFINE;
203 if( xvid_flags & CODEC_FLAG_QPEL ) {
204 x->vol_flags |= XVID_VOL_QUARTERPEL;
205 x->me_flags |= XVID_ME_QUARTERPELREFINE16;
206 if( x->vop_flags & XVID_VOP_INTER4V )
207 x->me_flags |= XVID_ME_QUARTERPELREFINE8;
210 memset(&xvid_gbl_init, 0, sizeof(xvid_gbl_init));
211 xvid_gbl_init.version = XVID_VERSION;
212 xvid_gbl_init.debug = 0;
215 /* Xvid's PPC support is borked, use libavcodec to detect */
217 if( has_altivec() ) {
218 xvid_gbl_init.cpu_flags = XVID_CPU_FORCE | XVID_CPU_ALTIVEC;
221 xvid_gbl_init.cpu_flags = XVID_CPU_FORCE;
223 /* Xvid can detect on x86 */
224 xvid_gbl_init.cpu_flags = 0;
228 xvid_global(NULL, XVID_GBL_INIT, &xvid_gbl_init, NULL);
230 /* Create the encoder reference */
231 memset(&xvid_enc_create, 0, sizeof(xvid_enc_create));
232 xvid_enc_create.version = XVID_VERSION;
234 /* Store the desired frame size */
235 xvid_enc_create.width = x->xsize = avctx->width;
236 xvid_enc_create.height = x->ysize = avctx->height;
238 /* Xvid can determine the proper profile to use */
239 /* xvid_enc_create.profile = XVID_PROFILE_S_L3; */
241 /* We don't use zones */
242 xvid_enc_create.zones = NULL;
243 xvid_enc_create.num_zones = 0;
245 xvid_enc_create.num_threads = avctx->thread_count;
247 xvid_enc_create.plugins = plugins;
248 xvid_enc_create.num_plugins = 0;
250 /* Initialize Buffers */
251 x->twopassbuffer = NULL;
252 x->old_twopassbuffer = NULL;
253 x->twopassfile = NULL;
255 if( xvid_flags & CODEC_FLAG_PASS1 ) {
256 memset(&rc2pass1, 0, sizeof(struct xvid_ff_pass1));
257 rc2pass1.version = XVID_VERSION;
258 rc2pass1.context = x;
259 x->twopassbuffer = av_malloc(BUFFER_SIZE);
260 x->old_twopassbuffer = av_malloc(BUFFER_SIZE);
261 if( x->twopassbuffer == NULL || x->old_twopassbuffer == NULL ) {
262 av_log(avctx, AV_LOG_ERROR,
263 "Xvid: Cannot allocate 2-pass log buffers\n");
266 x->twopassbuffer[0] = x->old_twopassbuffer[0] = 0;
268 plugins[xvid_enc_create.num_plugins].func = xvid_ff_2pass;
269 plugins[xvid_enc_create.num_plugins].param = &rc2pass1;
270 xvid_enc_create.num_plugins++;
271 } else if( xvid_flags & CODEC_FLAG_PASS2 ) {
272 memset(&rc2pass2, 0, sizeof(xvid_plugin_2pass2_t));
273 rc2pass2.version = XVID_VERSION;
274 rc2pass2.bitrate = avctx->bit_rate;
276 fd = ff_tempfile("xvidff.", &(x->twopassfile));
278 av_log(avctx, AV_LOG_ERROR,
279 "Xvid: Cannot write 2-pass pipe\n");
283 if( avctx->stats_in == NULL ) {
284 av_log(avctx, AV_LOG_ERROR,
285 "Xvid: No 2-pass information loaded for second pass\n");
289 if( strlen(avctx->stats_in) >
290 write(fd, avctx->stats_in, strlen(avctx->stats_in)) ) {
292 av_log(avctx, AV_LOG_ERROR,
293 "Xvid: Cannot write to 2-pass pipe\n");
298 rc2pass2.filename = x->twopassfile;
299 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_2pass2;
300 plugins[xvid_enc_create.num_plugins].param = &rc2pass2;
301 xvid_enc_create.num_plugins++;
302 } else if( !(xvid_flags & CODEC_FLAG_QSCALE) ) {
303 /* Single Pass Bitrate Control! */
304 memset(&single, 0, sizeof(xvid_plugin_single_t));
305 single.version = XVID_VERSION;
306 single.bitrate = avctx->bit_rate;
308 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_single;
309 plugins[xvid_enc_create.num_plugins].param = &single;
310 xvid_enc_create.num_plugins++;
313 /* Luminance Masking */
314 if( 0.0 != avctx->lumi_masking ) {
315 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_lumimasking;
316 plugins[xvid_enc_create.num_plugins].param = NULL;
317 xvid_enc_create.num_plugins++;
320 /* Frame Rate and Key Frames */
321 xvid_correct_framerate(avctx);
322 xvid_enc_create.fincr = avctx->time_base.num;
323 xvid_enc_create.fbase = avctx->time_base.den;
324 if( avctx->gop_size > 0 )
325 xvid_enc_create.max_key_interval = avctx->gop_size;
327 xvid_enc_create.max_key_interval = 240; /* Xvid's best default */
330 if( xvid_flags & CODEC_FLAG_QSCALE ) x->qscale = 1;
333 xvid_enc_create.min_quant[0] = avctx->qmin;
334 xvid_enc_create.min_quant[1] = avctx->qmin;
335 xvid_enc_create.min_quant[2] = avctx->qmin;
336 xvid_enc_create.max_quant[0] = avctx->qmax;
337 xvid_enc_create.max_quant[1] = avctx->qmax;
338 xvid_enc_create.max_quant[2] = avctx->qmax;
341 x->intra_matrix = x->inter_matrix = NULL;
342 if( avctx->mpeg_quant )
343 x->vol_flags |= XVID_VOL_MPEGQUANT;
344 if( (avctx->intra_matrix || avctx->inter_matrix) ) {
345 x->vol_flags |= XVID_VOL_MPEGQUANT;
347 if( avctx->intra_matrix ) {
348 intra = avctx->intra_matrix;
349 x->intra_matrix = av_malloc(sizeof(unsigned char) * 64);
352 if( avctx->inter_matrix ) {
353 inter = avctx->inter_matrix;
354 x->inter_matrix = av_malloc(sizeof(unsigned char) * 64);
358 for( i = 0; i < 64; i++ ) {
360 x->intra_matrix[i] = (unsigned char)intra[i];
362 x->inter_matrix[i] = (unsigned char)inter[i];
367 xvid_enc_create.frame_drop_ratio = 0;
368 xvid_enc_create.global = 0;
369 if( xvid_flags & CODEC_FLAG_CLOSED_GOP )
370 xvid_enc_create.global |= XVID_GLOBAL_CLOSED_GOP;
372 /* Determines which codec mode we are operating in */
373 avctx->extradata = NULL;
374 avctx->extradata_size = 0;
375 if( xvid_flags & CODEC_FLAG_GLOBAL_HEADER ) {
376 /* In this case, we are claiming to be MPEG4 */
377 x->quicktime_format = 1;
378 avctx->codec_id = CODEC_ID_MPEG4;
380 /* We are claiming to be Xvid */
381 x->quicktime_format = 0;
382 if(!avctx->codec_tag)
383 avctx->codec_tag = AV_RL32("xvid");
387 xvid_enc_create.max_bframes = avctx->max_b_frames;
388 xvid_enc_create.bquant_offset = 100 * avctx->b_quant_offset;
389 xvid_enc_create.bquant_ratio = 100 * avctx->b_quant_factor;
390 if( avctx->max_b_frames > 0 && !x->quicktime_format ) xvid_enc_create.global |= XVID_GLOBAL_PACKED;
392 /* Create encoder context */
393 xerr = xvid_encore(NULL, XVID_ENC_CREATE, &xvid_enc_create, NULL);
395 av_log(avctx, AV_LOG_ERROR, "Xvid: Could not create encoder reference\n");
399 x->encoder_handle = xvid_enc_create.handle;
400 avctx->coded_frame = &x->encoded_picture;
406 * Encode a single frame.
408 * @param avctx AVCodecContext pointer to context
409 * @param frame Pointer to encoded frame buffer
410 * @param buf_size Size of encoded frame buffer
411 * @param data Pointer to AVFrame of unencoded frame
412 * @return Returns 0 on success, -1 on failure
414 static int xvid_encode_frame(AVCodecContext *avctx,
415 unsigned char *frame, int buf_size, void *data) {
418 struct xvid_context *x = avctx->priv_data;
419 AVFrame *picture = data;
420 AVFrame *p = &(x->encoded_picture);
422 xvid_enc_frame_t xvid_enc_frame;
423 xvid_enc_stats_t xvid_enc_stats;
425 /* Start setting up the frame */
426 memset(&xvid_enc_frame, 0, sizeof(xvid_enc_frame));
427 xvid_enc_frame.version = XVID_VERSION;
428 memset(&xvid_enc_stats, 0, sizeof(xvid_enc_stats));
429 xvid_enc_stats.version = XVID_VERSION;
432 /* Let Xvid know where to put the frame. */
433 xvid_enc_frame.bitstream = frame;
434 xvid_enc_frame.length = buf_size;
436 /* Initialize input image fields */
437 if( avctx->pix_fmt != PIX_FMT_YUV420P ) {
438 av_log(avctx, AV_LOG_ERROR, "Xvid: Color spaces other than 420p not supported\n");
442 xvid_enc_frame.input.csp = XVID_CSP_PLANAR; /* YUV420P */
444 for( i = 0; i < 4; i++ ) {
445 xvid_enc_frame.input.plane[i] = picture->data[i];
446 xvid_enc_frame.input.stride[i] = picture->linesize[i];
450 xvid_enc_frame.vop_flags = x->vop_flags;
451 xvid_enc_frame.vol_flags = x->vol_flags;
452 xvid_enc_frame.motion = x->me_flags;
453 xvid_enc_frame.type = XVID_TYPE_AUTO;
455 /* Pixel aspect ratio setting */
456 if (avctx->sample_aspect_ratio.num < 1 || avctx->sample_aspect_ratio.num > 255 ||
457 avctx->sample_aspect_ratio.den < 1 || 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 = FF_P_TYPE;
494 else if( xvid_enc_stats.type == XVID_TYPE_BVOP )
495 p->pict_type = FF_B_TYPE;
496 else if( xvid_enc_stats.type == XVID_TYPE_SVOP )
497 p->pict_type = FF_S_TYPE;
499 p->pict_type = FF_I_TYPE;
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 if( avctx->extradata != NULL )
528 av_freep(&avctx->extradata);
529 if( x->twopassbuffer != NULL ) {
530 av_free(x->twopassbuffer);
531 av_free(x->old_twopassbuffer);
533 if( x->twopassfile != NULL )
534 av_free(x->twopassfile);
535 if( x->intra_matrix != NULL )
536 av_free(x->intra_matrix);
537 if( x->inter_matrix != NULL )
538 av_free(x->inter_matrix);
544 * Routine to create a global VO/VOL header for MP4 container.
545 * What we do here is extract the header from the Xvid bitstream
546 * as it is encoded. We also strip the repeated headers from the
547 * bitstream when a global header is requested for MPEG-4 ISO
550 * @param avctx AVCodecContext pointer to context
551 * @param frame Pointer to encoded frame data
552 * @param header_len Length of header to search
553 * @param frame_len Length of encoded frame data
554 * @return Returns new length of frame data
556 int xvid_strip_vol_header(AVCodecContext *avctx,
557 unsigned char *frame,
558 unsigned int header_len,
559 unsigned int frame_len) {
562 for( i = 0; i < header_len - 3; i++ ) {
563 if( frame[i] == 0x00 &&
564 frame[i+1] == 0x00 &&
565 frame[i+2] == 0x01 &&
566 frame[i+3] == 0xB6 ) {
573 /* We need to store the header, so extract it */
574 if( avctx->extradata == NULL ) {
575 avctx->extradata = av_malloc(vo_len);
576 memcpy(avctx->extradata, frame, vo_len);
577 avctx->extradata_size = vo_len;
579 /* Less dangerous now, memmove properly copies the two
580 chunks of overlapping data */
581 memmove(frame, &(frame[vo_len]), frame_len - vo_len);
582 return frame_len - vo_len;
588 * Routine to correct a possibly erroneous framerate being fed to us.
589 * Xvid currently chokes on framerates where the ticks per frame is
590 * extremely large. This function works to correct problems in this area
591 * by estimating a new framerate and taking the simpler fraction of
594 * @param avctx Context that contains the framerate to correct.
596 void xvid_correct_framerate(AVCodecContext *avctx) {
598 int est_frate, est_fbase;
602 frate = avctx->time_base.den;
603 fbase = avctx->time_base.num;
605 gcd = av_gcd(frate, fbase);
611 if( frate <= 65000 && fbase <= 65000 ) {
612 avctx->time_base.den = frate;
613 avctx->time_base.num = fbase;
617 fps = (float)frate / (float)fbase;
618 est_fps = roundf(fps * 1000.0) / 1000.0;
620 est_frate = (int)est_fps;
621 if( est_fps > (int)est_fps ) {
622 est_frate = (est_frate + 1) * 1000;
623 est_fbase = (int)roundf((float)est_frate / est_fps);
627 gcd = av_gcd(est_frate, est_fbase);
633 if( fbase > est_fbase ) {
634 avctx->time_base.den = est_frate;
635 avctx->time_base.num = est_fbase;
636 av_log(avctx, AV_LOG_DEBUG,
637 "Xvid: framerate re-estimated: %.2f, %.3f%% correction\n",
638 est_fps, (((est_fps - fps)/fps) * 100.0));
640 avctx->time_base.den = frate;
641 avctx->time_base.num = fbase;
646 * Xvid 2-Pass Kludge Section
648 * Xvid's default 2-pass doesn't allow us to create data as we need to, so
649 * this section spends time replacing the first pass plugin so we can write
650 * statistic information as libavcodec requests in. We have another kludge
651 * that allows us to pass data to the second pass in Xvid without a custom
652 * rate-control plugin.
656 * Initialize the two-pass plugin and context.
658 * @param param Input construction parameter structure
659 * @param handle Private context handle
660 * @return Returns XVID_ERR_xxxx on failure, or 0 on success.
662 static int xvid_ff_2pass_create(xvid_plg_create_t * param,
664 struct xvid_ff_pass1 *x = (struct xvid_ff_pass1 *)param->param;
665 char *log = x->context->twopassbuffer;
667 /* Do a quick bounds check */
669 return XVID_ERR_FAIL;
671 /* We use snprintf() */
672 /* This is because we can safely prevent a buffer overflow */
674 snprintf(log, BUFFER_REMAINING(log),
675 "# ffmpeg 2-pass log file, using xvid codec\n");
676 snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log),
677 "# Do not modify. libxvidcore version: %d.%d.%d\n\n",
678 XVID_VERSION_MAJOR(XVID_VERSION),
679 XVID_VERSION_MINOR(XVID_VERSION),
680 XVID_VERSION_PATCH(XVID_VERSION));
682 *handle = x->context;
687 * Destroy the two-pass plugin context.
689 * @param ref Context pointer for the plugin
690 * @param param Destrooy context
691 * @return Returns 0, success guaranteed
693 static int xvid_ff_2pass_destroy(struct xvid_context *ref,
694 xvid_plg_destroy_t *param) {
695 /* Currently cannot think of anything to do on destruction */
696 /* Still, the framework should be here for reference/use */
697 if( ref->twopassbuffer != NULL )
698 ref->twopassbuffer[0] = 0;
703 * Enable fast encode mode during the first pass.
705 * @param ref Context pointer for the plugin
706 * @param param Frame data
707 * @return Returns 0, success guaranteed
709 static int xvid_ff_2pass_before(struct xvid_context *ref,
710 xvid_plg_data_t *param) {
712 int motion_replacements;
715 /* Nothing to do here, result is changed too much */
716 if( param->zone && param->zone->mode == XVID_ZONE_QUANT )
719 /* We can implement a 'turbo' first pass mode here */
723 motion_remove = ~XVID_ME_CHROMA_PVOP &
724 ~XVID_ME_CHROMA_BVOP &
725 ~XVID_ME_EXTSEARCH16 &
726 ~XVID_ME_ADVANCEDDIAMOND16;
727 motion_replacements = XVID_ME_FAST_MODEINTERPOLATE |
728 XVID_ME_SKIP_DELTASEARCH |
729 XVID_ME_FASTREFINE16 |
730 XVID_ME_BFRAME_EARLYSTOP;
731 vop_remove = ~XVID_VOP_MODEDECISION_RD &
732 ~XVID_VOP_FAST_MODEDECISION_RD &
733 ~XVID_VOP_TRELLISQUANT &
737 param->vol_flags &= ~XVID_VOL_GMC;
738 param->vop_flags &= vop_remove;
739 param->motion_flags &= motion_remove;
740 param->motion_flags |= motion_replacements;
746 * Capture statistic data and write it during first pass.
748 * @param ref Context pointer for the plugin
749 * @param param Statistic data
750 * @return Returns XVID_ERR_xxxx on failure, or 0 on success
752 static int xvid_ff_2pass_after(struct xvid_context *ref,
753 xvid_plg_data_t *param) {
754 char *log = ref->twopassbuffer;
755 char *frame_types = " ipbs";
758 /* Quick bounds check */
760 return XVID_ERR_FAIL;
762 /* Convert the type given to us into a character */
763 if( param->type < 5 && param->type > 0 ) {
764 frame_type = frame_types[param->type];
766 return XVID_ERR_FAIL;
769 snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log),
770 "%c %d %d %d %d %d %d\n",
771 frame_type, param->stats.quant, param->stats.kblks, param->stats.mblks,
772 param->stats.ublks, param->stats.length, param->stats.hlength);
778 * Dispatch function for our custom plugin.
779 * This handles the dispatch for the Xvid plugin. It passes data
780 * on to other functions for actual processing.
782 * @param ref Context pointer for the plugin
783 * @param cmd The task given for us to complete
784 * @param p1 First parameter (varies)
785 * @param p2 Second parameter (varies)
786 * @return Returns XVID_ERR_xxxx on failure, or 0 on success
788 int xvid_ff_2pass(void *ref, int cmd, void *p1, void *p2) {
794 case XVID_PLG_BEFORE:
795 return xvid_ff_2pass_before(ref, p1);
797 case XVID_PLG_CREATE:
798 return xvid_ff_2pass_create(p1, p2);
801 return xvid_ff_2pass_after(ref, p1);
803 case XVID_PLG_DESTROY:
804 return xvid_ff_2pass_destroy(ref, p1);
807 return XVID_ERR_FAIL;
812 * Xvid codec definition for libavcodec.
814 AVCodec libxvid_encoder = {
818 sizeof(struct xvid_context),
822 .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
823 .long_name= NULL_IF_CONFIG_SMALL("libxvidcore MPEG-4 part 2"),
826 #endif /* CONFIG_LIBXVID_ENCODER */