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"
40 * Buffer management macros.
42 #define BUFFER_SIZE 1024
43 #define BUFFER_REMAINING(x) (BUFFER_SIZE - strlen(x))
44 #define BUFFER_CAT(x) (&((x)[strlen(x)]))
47 * Structure for the private Xvid context.
48 * This stores all the private context for the codec.
51 void *encoder_handle; /**< Handle for Xvid encoder */
52 int xsize; /**< Frame x size */
53 int ysize; /**< Frame y size */
54 int vop_flags; /**< VOP flags for Xvid encoder */
55 int vol_flags; /**< VOL flags for Xvid encoder */
56 int me_flags; /**< Motion Estimation flags */
57 int qscale; /**< Do we use constant scale? */
58 int quicktime_format; /**< Are we in a QT-based format? */
59 AVFrame encoded_picture; /**< Encoded frame information */
60 char *twopassbuffer; /**< Character buffer for two-pass */
61 char *old_twopassbuffer; /**< Old character buffer (two-pass) */
62 char *twopassfile; /**< second pass temp file name */
63 unsigned char *intra_matrix; /**< P-Frame Quant Matrix */
64 unsigned char *inter_matrix; /**< I-Frame Quant Matrix */
68 * Structure for the private first-pass plugin.
70 struct xvid_ff_pass1 {
71 int version; /**< Xvid version */
72 struct xvid_context *context; /**< Pointer to private context */
75 /* Prototypes - See function implementation for details */
76 int xvid_strip_vol_header(AVCodecContext *avctx, unsigned char *frame, unsigned int header_len, unsigned int frame_len);
77 int xvid_ff_2pass(void *ref, int opt, void *p1, void *p2);
78 void xvid_correct_framerate(AVCodecContext *avctx);
80 /* Wrapper to work around the lack of mkstemp() on mingw.
81 * Also, tries to create file in /tmp first, if possible.
82 * *prefix can be a character constant; *filename will be allocated internally.
83 * @return file descriptor of opened file (or -1 on error)
84 * and opened file name in **filename. */
85 int ff_tempfile(const char *prefix, char **filename) {
88 *filename = tempnam(".", prefix);
90 size_t len = strlen(prefix) + 12; /* room for "/tmp/" and "XXXXXX\0" */
91 *filename = av_malloc(len);
93 /* -----common section-----*/
94 if (*filename == NULL) {
95 av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot allocate file name\n");
99 fd = open(*filename, O_RDWR | O_BINARY | O_CREAT, 0444);
101 snprintf(*filename, len, "/tmp/%sXXXXXX", prefix);
102 fd = mkstemp(*filename);
104 snprintf(*filename, len, "./%sXXXXXX", prefix);
105 fd = mkstemp(*filename);
108 /* -----common section-----*/
110 av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot open temporary file %s\n", *filename);
113 return fd; /* success */
116 #if CONFIG_LIBXVID_ENCODER
119 * Create the private context for the encoder.
120 * All buffers are allocated, settings are loaded from the user,
121 * and the encoder context created.
123 * @param avctx AVCodecContext pointer to context
124 * @return Returns 0 on success, -1 on failure
126 static av_cold int xvid_encode_init(AVCodecContext *avctx) {
128 int xvid_flags = avctx->flags;
129 struct xvid_context *x = avctx->priv_data;
130 uint16_t *intra, *inter;
133 xvid_plugin_single_t single;
134 struct xvid_ff_pass1 rc2pass1;
135 xvid_plugin_2pass2_t rc2pass2;
136 xvid_gbl_init_t xvid_gbl_init;
137 xvid_enc_create_t xvid_enc_create;
138 xvid_enc_plugin_t plugins[7];
140 /* Bring in VOP flags from ffmpeg command-line */
141 x->vop_flags = XVID_VOP_HALFPEL; /* Bare minimum quality */
142 if( xvid_flags & CODEC_FLAG_4MV )
143 x->vop_flags |= XVID_VOP_INTER4V; /* Level 3 */
146 x->vop_flags |= XVID_VOP_TRELLISQUANT; /* Level 5 */
147 if( xvid_flags & CODEC_FLAG_AC_PRED )
148 x->vop_flags |= XVID_VOP_HQACPRED; /* Level 6 */
149 if( xvid_flags & CODEC_FLAG_GRAY )
150 x->vop_flags |= XVID_VOP_GREYSCALE;
152 /* Decide which ME quality setting to use */
154 switch( avctx->me_method ) {
155 case ME_FULL: /* Quality 6 */
156 x->me_flags |= XVID_ME_EXTSEARCH16
157 | XVID_ME_EXTSEARCH8;
159 case ME_EPZS: /* Quality 4 */
160 x->me_flags |= XVID_ME_ADVANCEDDIAMOND8
161 | XVID_ME_HALFPELREFINE8
162 | XVID_ME_CHROMA_PVOP
163 | XVID_ME_CHROMA_BVOP;
165 case ME_LOG: /* Quality 2 */
168 x->me_flags |= XVID_ME_ADVANCEDDIAMOND16
169 | XVID_ME_HALFPELREFINE16;
171 case ME_ZERO: /* Quality 0 */
176 /* Decide how we should decide blocks */
177 switch( avctx->mb_decision ) {
179 x->vop_flags |= XVID_VOP_MODEDECISION_RD;
180 x->me_flags |= XVID_ME_HALFPELREFINE8_RD
181 | XVID_ME_QUARTERPELREFINE8_RD
182 | XVID_ME_EXTSEARCH_RD
183 | XVID_ME_CHECKPREDICTION_RD;
185 if( !(x->vop_flags & XVID_VOP_MODEDECISION_RD) )
186 x->vop_flags |= XVID_VOP_FAST_MODEDECISION_RD;
187 x->me_flags |= XVID_ME_HALFPELREFINE16_RD
188 | XVID_ME_QUARTERPELREFINE16_RD;
194 /* Bring in VOL flags from ffmpeg command-line */
196 if( xvid_flags & CODEC_FLAG_GMC ) {
197 x->vol_flags |= XVID_VOL_GMC;
198 x->me_flags |= XVID_ME_GME_REFINE;
200 if( xvid_flags & CODEC_FLAG_QPEL ) {
201 x->vol_flags |= XVID_VOL_QUARTERPEL;
202 x->me_flags |= XVID_ME_QUARTERPELREFINE16;
203 if( x->vop_flags & XVID_VOP_INTER4V )
204 x->me_flags |= XVID_ME_QUARTERPELREFINE8;
207 memset(&xvid_gbl_init, 0, sizeof(xvid_gbl_init));
208 xvid_gbl_init.version = XVID_VERSION;
209 xvid_gbl_init.debug = 0;
212 /* Xvid's PPC support is borked, use libavcodec to detect */
214 if (av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC) {
215 xvid_gbl_init.cpu_flags = XVID_CPU_FORCE | XVID_CPU_ALTIVEC;
218 xvid_gbl_init.cpu_flags = XVID_CPU_FORCE;
220 /* Xvid can detect on x86 */
221 xvid_gbl_init.cpu_flags = 0;
225 xvid_global(NULL, XVID_GBL_INIT, &xvid_gbl_init, NULL);
227 /* Create the encoder reference */
228 memset(&xvid_enc_create, 0, sizeof(xvid_enc_create));
229 xvid_enc_create.version = XVID_VERSION;
231 /* Store the desired frame size */
232 xvid_enc_create.width = x->xsize = avctx->width;
233 xvid_enc_create.height = x->ysize = avctx->height;
235 /* Xvid can determine the proper profile to use */
236 /* xvid_enc_create.profile = XVID_PROFILE_S_L3; */
238 /* We don't use zones */
239 xvid_enc_create.zones = NULL;
240 xvid_enc_create.num_zones = 0;
242 xvid_enc_create.num_threads = avctx->thread_count;
244 xvid_enc_create.plugins = plugins;
245 xvid_enc_create.num_plugins = 0;
247 /* Initialize Buffers */
248 x->twopassbuffer = NULL;
249 x->old_twopassbuffer = NULL;
250 x->twopassfile = NULL;
252 if( xvid_flags & CODEC_FLAG_PASS1 ) {
253 memset(&rc2pass1, 0, sizeof(struct xvid_ff_pass1));
254 rc2pass1.version = XVID_VERSION;
255 rc2pass1.context = x;
256 x->twopassbuffer = av_malloc(BUFFER_SIZE);
257 x->old_twopassbuffer = av_malloc(BUFFER_SIZE);
258 if( x->twopassbuffer == NULL || x->old_twopassbuffer == NULL ) {
259 av_log(avctx, AV_LOG_ERROR,
260 "Xvid: Cannot allocate 2-pass log buffers\n");
263 x->twopassbuffer[0] = x->old_twopassbuffer[0] = 0;
265 plugins[xvid_enc_create.num_plugins].func = xvid_ff_2pass;
266 plugins[xvid_enc_create.num_plugins].param = &rc2pass1;
267 xvid_enc_create.num_plugins++;
268 } else if( xvid_flags & CODEC_FLAG_PASS2 ) {
269 memset(&rc2pass2, 0, sizeof(xvid_plugin_2pass2_t));
270 rc2pass2.version = XVID_VERSION;
271 rc2pass2.bitrate = avctx->bit_rate;
273 fd = ff_tempfile("xvidff.", &(x->twopassfile));
275 av_log(avctx, AV_LOG_ERROR,
276 "Xvid: Cannot write 2-pass pipe\n");
280 if( avctx->stats_in == NULL ) {
281 av_log(avctx, AV_LOG_ERROR,
282 "Xvid: No 2-pass information loaded for second pass\n");
286 if( strlen(avctx->stats_in) >
287 write(fd, avctx->stats_in, strlen(avctx->stats_in)) ) {
289 av_log(avctx, AV_LOG_ERROR,
290 "Xvid: Cannot write to 2-pass pipe\n");
295 rc2pass2.filename = x->twopassfile;
296 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_2pass2;
297 plugins[xvid_enc_create.num_plugins].param = &rc2pass2;
298 xvid_enc_create.num_plugins++;
299 } else if( !(xvid_flags & CODEC_FLAG_QSCALE) ) {
300 /* Single Pass Bitrate Control! */
301 memset(&single, 0, sizeof(xvid_plugin_single_t));
302 single.version = XVID_VERSION;
303 single.bitrate = avctx->bit_rate;
305 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_single;
306 plugins[xvid_enc_create.num_plugins].param = &single;
307 xvid_enc_create.num_plugins++;
310 /* Luminance Masking */
311 if( 0.0 != avctx->lumi_masking ) {
312 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_lumimasking;
313 plugins[xvid_enc_create.num_plugins].param = NULL;
314 xvid_enc_create.num_plugins++;
317 /* Frame Rate and Key Frames */
318 xvid_correct_framerate(avctx);
319 xvid_enc_create.fincr = avctx->time_base.num;
320 xvid_enc_create.fbase = avctx->time_base.den;
321 if( avctx->gop_size > 0 )
322 xvid_enc_create.max_key_interval = avctx->gop_size;
324 xvid_enc_create.max_key_interval = 240; /* Xvid's best default */
327 if( xvid_flags & CODEC_FLAG_QSCALE ) x->qscale = 1;
330 xvid_enc_create.min_quant[0] = avctx->qmin;
331 xvid_enc_create.min_quant[1] = avctx->qmin;
332 xvid_enc_create.min_quant[2] = avctx->qmin;
333 xvid_enc_create.max_quant[0] = avctx->qmax;
334 xvid_enc_create.max_quant[1] = avctx->qmax;
335 xvid_enc_create.max_quant[2] = avctx->qmax;
338 x->intra_matrix = x->inter_matrix = NULL;
339 if( avctx->mpeg_quant )
340 x->vol_flags |= XVID_VOL_MPEGQUANT;
341 if( (avctx->intra_matrix || avctx->inter_matrix) ) {
342 x->vol_flags |= XVID_VOL_MPEGQUANT;
344 if( avctx->intra_matrix ) {
345 intra = avctx->intra_matrix;
346 x->intra_matrix = av_malloc(sizeof(unsigned char) * 64);
349 if( avctx->inter_matrix ) {
350 inter = avctx->inter_matrix;
351 x->inter_matrix = av_malloc(sizeof(unsigned char) * 64);
355 for( i = 0; i < 64; i++ ) {
357 x->intra_matrix[i] = (unsigned char)intra[i];
359 x->inter_matrix[i] = (unsigned char)inter[i];
364 xvid_enc_create.frame_drop_ratio = 0;
365 xvid_enc_create.global = 0;
366 if( xvid_flags & CODEC_FLAG_CLOSED_GOP )
367 xvid_enc_create.global |= XVID_GLOBAL_CLOSED_GOP;
369 /* Determines which codec mode we are operating in */
370 avctx->extradata = NULL;
371 avctx->extradata_size = 0;
372 if( xvid_flags & CODEC_FLAG_GLOBAL_HEADER ) {
373 /* In this case, we are claiming to be MPEG4 */
374 x->quicktime_format = 1;
375 avctx->codec_id = CODEC_ID_MPEG4;
377 /* We are claiming to be Xvid */
378 x->quicktime_format = 0;
379 if(!avctx->codec_tag)
380 avctx->codec_tag = AV_RL32("xvid");
384 xvid_enc_create.max_bframes = avctx->max_b_frames;
385 xvid_enc_create.bquant_offset = 100 * avctx->b_quant_offset;
386 xvid_enc_create.bquant_ratio = 100 * avctx->b_quant_factor;
387 if( avctx->max_b_frames > 0 && !x->quicktime_format ) xvid_enc_create.global |= XVID_GLOBAL_PACKED;
389 /* Create encoder context */
390 xerr = xvid_encore(NULL, XVID_ENC_CREATE, &xvid_enc_create, NULL);
392 av_log(avctx, AV_LOG_ERROR, "Xvid: Could not create encoder reference\n");
396 x->encoder_handle = xvid_enc_create.handle;
397 avctx->coded_frame = &x->encoded_picture;
403 * Encode a single frame.
405 * @param avctx AVCodecContext pointer to context
406 * @param frame Pointer to encoded frame buffer
407 * @param buf_size Size of encoded frame buffer
408 * @param data Pointer to AVFrame of unencoded frame
409 * @return Returns 0 on success, -1 on failure
411 static int xvid_encode_frame(AVCodecContext *avctx,
412 unsigned char *frame, int buf_size, void *data) {
415 struct xvid_context *x = avctx->priv_data;
416 AVFrame *picture = data;
417 AVFrame *p = &(x->encoded_picture);
419 xvid_enc_frame_t xvid_enc_frame;
420 xvid_enc_stats_t xvid_enc_stats;
422 /* Start setting up the frame */
423 memset(&xvid_enc_frame, 0, sizeof(xvid_enc_frame));
424 xvid_enc_frame.version = XVID_VERSION;
425 memset(&xvid_enc_stats, 0, sizeof(xvid_enc_stats));
426 xvid_enc_stats.version = XVID_VERSION;
429 /* Let Xvid know where to put the frame. */
430 xvid_enc_frame.bitstream = frame;
431 xvid_enc_frame.length = buf_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;
492 p->quality = xvid_enc_stats.quant * FF_QP2LAMBDA;
493 if( xvid_enc_stats.type == XVID_TYPE_PVOP )
494 p->pict_type = AV_PICTURE_TYPE_P;
495 else if( xvid_enc_stats.type == XVID_TYPE_BVOP )
496 p->pict_type = AV_PICTURE_TYPE_B;
497 else if( xvid_enc_stats.type == XVID_TYPE_SVOP )
498 p->pict_type = AV_PICTURE_TYPE_S;
500 p->pict_type = AV_PICTURE_TYPE_I;
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 av_freep(&avctx->extradata);
529 if( x->twopassbuffer != NULL ) {
530 av_free(x->twopassbuffer);
531 av_free(x->old_twopassbuffer);
533 av_free(x->twopassfile);
534 av_free(x->intra_matrix);
535 av_free(x->inter_matrix);
541 * Routine to create a global VO/VOL header for MP4 container.
542 * What we do here is extract the header from the Xvid bitstream
543 * as it is encoded. We also strip the repeated headers from the
544 * bitstream when a global header is requested for MPEG-4 ISO
547 * @param avctx AVCodecContext pointer to context
548 * @param frame Pointer to encoded frame data
549 * @param header_len Length of header to search
550 * @param frame_len Length of encoded frame data
551 * @return Returns new length of frame data
553 int xvid_strip_vol_header(AVCodecContext *avctx,
554 unsigned char *frame,
555 unsigned int header_len,
556 unsigned int frame_len) {
559 for( i = 0; i < header_len - 3; i++ ) {
560 if( frame[i] == 0x00 &&
561 frame[i+1] == 0x00 &&
562 frame[i+2] == 0x01 &&
563 frame[i+3] == 0xB6 ) {
570 /* We need to store the header, so extract it */
571 if( avctx->extradata == NULL ) {
572 avctx->extradata = av_malloc(vo_len);
573 memcpy(avctx->extradata, frame, vo_len);
574 avctx->extradata_size = vo_len;
576 /* Less dangerous now, memmove properly copies the two
577 chunks of overlapping data */
578 memmove(frame, &(frame[vo_len]), frame_len - vo_len);
579 return frame_len - vo_len;
585 * Routine to correct a possibly erroneous framerate being fed to us.
586 * Xvid currently chokes on framerates where the ticks per frame is
587 * extremely large. This function works to correct problems in this area
588 * by estimating a new framerate and taking the simpler fraction of
591 * @param avctx Context that contains the framerate to correct.
593 void xvid_correct_framerate(AVCodecContext *avctx) {
595 int est_frate, est_fbase;
599 frate = avctx->time_base.den;
600 fbase = avctx->time_base.num;
602 gcd = av_gcd(frate, fbase);
608 if( frate <= 65000 && fbase <= 65000 ) {
609 avctx->time_base.den = frate;
610 avctx->time_base.num = fbase;
614 fps = (float)frate / (float)fbase;
615 est_fps = roundf(fps * 1000.0) / 1000.0;
617 est_frate = (int)est_fps;
618 if( est_fps > (int)est_fps ) {
619 est_frate = (est_frate + 1) * 1000;
620 est_fbase = (int)roundf((float)est_frate / est_fps);
624 gcd = av_gcd(est_frate, est_fbase);
630 if( fbase > est_fbase ) {
631 avctx->time_base.den = est_frate;
632 avctx->time_base.num = est_fbase;
633 av_log(avctx, AV_LOG_DEBUG,
634 "Xvid: framerate re-estimated: %.2f, %.3f%% correction\n",
635 est_fps, (((est_fps - fps)/fps) * 100.0));
637 avctx->time_base.den = frate;
638 avctx->time_base.num = fbase;
643 * Xvid 2-Pass Kludge Section
645 * Xvid's default 2-pass doesn't allow us to create data as we need to, so
646 * this section spends time replacing the first pass plugin so we can write
647 * statistic information as libavcodec requests in. We have another kludge
648 * that allows us to pass data to the second pass in Xvid without a custom
649 * rate-control plugin.
653 * Initialize the two-pass plugin and context.
655 * @param param Input construction parameter structure
656 * @param handle Private context handle
657 * @return Returns XVID_ERR_xxxx on failure, or 0 on success.
659 static int xvid_ff_2pass_create(xvid_plg_create_t * param,
661 struct xvid_ff_pass1 *x = (struct xvid_ff_pass1 *)param->param;
662 char *log = x->context->twopassbuffer;
664 /* Do a quick bounds check */
666 return XVID_ERR_FAIL;
668 /* We use snprintf() */
669 /* This is because we can safely prevent a buffer overflow */
671 snprintf(log, BUFFER_REMAINING(log),
672 "# ffmpeg 2-pass log file, using xvid codec\n");
673 snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log),
674 "# Do not modify. libxvidcore version: %d.%d.%d\n\n",
675 XVID_VERSION_MAJOR(XVID_VERSION),
676 XVID_VERSION_MINOR(XVID_VERSION),
677 XVID_VERSION_PATCH(XVID_VERSION));
679 *handle = x->context;
684 * Destroy the two-pass plugin context.
686 * @param ref Context pointer for the plugin
687 * @param param Destrooy context
688 * @return Returns 0, success guaranteed
690 static int xvid_ff_2pass_destroy(struct xvid_context *ref,
691 xvid_plg_destroy_t *param) {
692 /* Currently cannot think of anything to do on destruction */
693 /* Still, the framework should be here for reference/use */
694 if( ref->twopassbuffer != NULL )
695 ref->twopassbuffer[0] = 0;
700 * Enable fast encode mode during the first pass.
702 * @param ref Context pointer for the plugin
703 * @param param Frame data
704 * @return Returns 0, success guaranteed
706 static int xvid_ff_2pass_before(struct xvid_context *ref,
707 xvid_plg_data_t *param) {
709 int motion_replacements;
712 /* Nothing to do here, result is changed too much */
713 if( param->zone && param->zone->mode == XVID_ZONE_QUANT )
716 /* We can implement a 'turbo' first pass mode here */
720 motion_remove = ~XVID_ME_CHROMA_PVOP &
721 ~XVID_ME_CHROMA_BVOP &
722 ~XVID_ME_EXTSEARCH16 &
723 ~XVID_ME_ADVANCEDDIAMOND16;
724 motion_replacements = XVID_ME_FAST_MODEINTERPOLATE |
725 XVID_ME_SKIP_DELTASEARCH |
726 XVID_ME_FASTREFINE16 |
727 XVID_ME_BFRAME_EARLYSTOP;
728 vop_remove = ~XVID_VOP_MODEDECISION_RD &
729 ~XVID_VOP_FAST_MODEDECISION_RD &
730 ~XVID_VOP_TRELLISQUANT &
734 param->vol_flags &= ~XVID_VOL_GMC;
735 param->vop_flags &= vop_remove;
736 param->motion_flags &= motion_remove;
737 param->motion_flags |= motion_replacements;
743 * Capture statistic data and write it during first pass.
745 * @param ref Context pointer for the plugin
746 * @param param Statistic data
747 * @return Returns XVID_ERR_xxxx on failure, or 0 on success
749 static int xvid_ff_2pass_after(struct xvid_context *ref,
750 xvid_plg_data_t *param) {
751 char *log = ref->twopassbuffer;
752 const char *frame_types = " ipbs";
755 /* Quick bounds check */
757 return XVID_ERR_FAIL;
759 /* Convert the type given to us into a character */
760 if( param->type < 5 && param->type > 0 ) {
761 frame_type = frame_types[param->type];
763 return XVID_ERR_FAIL;
766 snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log),
767 "%c %d %d %d %d %d %d\n",
768 frame_type, param->stats.quant, param->stats.kblks, param->stats.mblks,
769 param->stats.ublks, param->stats.length, param->stats.hlength);
775 * Dispatch function for our custom plugin.
776 * This handles the dispatch for the Xvid plugin. It passes data
777 * on to other functions for actual processing.
779 * @param ref Context pointer for the plugin
780 * @param cmd The task given for us to complete
781 * @param p1 First parameter (varies)
782 * @param p2 Second parameter (varies)
783 * @return Returns XVID_ERR_xxxx on failure, or 0 on success
785 int xvid_ff_2pass(void *ref, int cmd, void *p1, void *p2) {
791 case XVID_PLG_BEFORE:
792 return xvid_ff_2pass_before(ref, p1);
794 case XVID_PLG_CREATE:
795 return xvid_ff_2pass_create(p1, p2);
798 return xvid_ff_2pass_after(ref, p1);
800 case XVID_PLG_DESTROY:
801 return xvid_ff_2pass_destroy(ref, p1);
804 return XVID_ERR_FAIL;
809 * Xvid codec definition for libavcodec.
811 AVCodec ff_libxvid_encoder = {
813 .type = AVMEDIA_TYPE_VIDEO,
814 .id = CODEC_ID_MPEG4,
815 .priv_data_size = sizeof(struct xvid_context),
816 .init = xvid_encode_init,
817 .encode = xvid_encode_frame,
818 .close = xvid_encode_close,
819 .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
820 .long_name= NULL_IF_CONFIG_SMALL("libxvidcore MPEG-4 part 2"),
823 #endif /* CONFIG_LIBXVID_ENCODER */